diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl3945-base.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl3945-base.c | 8746 |
1 files changed, 8746 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl3945-base.c b/drivers/net/wireless/iwlwifi/iwl3945-base.c new file mode 100644 index 00000000000..75e3b5c3f15 --- /dev/null +++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c @@ -0,0 +1,8746 @@ +/****************************************************************************** + * + * Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved. + * + * Portions of this file are derived from the ipw3945 project, as well + * as portions of the ieee80211 subsystem header files. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA + * + * The full GNU General Public License is included in this distribution in the + * file called LICENSE. + * + * Contact Information: + * James P. Ketrenos <ipw2100-admin@linux.intel.com> + * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 + * + *****************************************************************************/ + +/* + * NOTE: This file (iwl-base.c) is used to build to multiple hardware targets + * by defining IWL to either 3945 or 4965. The Makefile used when building + * the base targets will create base-3945.o and base-4965.o + * + * The eventual goal is to move as many of the #if IWL / #endif blocks out of + * this file and into the hardware specific implementation files (iwl-XXXX.c) + * and leave only the common (non #ifdef sprinkled) code in this file + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/version.h> +#include <linux/init.h> +#include <linux/pci.h> +#include <linux/dma-mapping.h> +#include <linux/delay.h> +#include <linux/skbuff.h> +#include <linux/netdevice.h> +#include <linux/wireless.h> +#include <linux/firmware.h> +#include <linux/skbuff.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/if_arp.h> + +#include <net/ieee80211_radiotap.h> +#include <net/mac80211.h> + +#include <asm/div64.h> + +#define IWL 3945 + +#include "iwlwifi.h" +#include "iwl-3945.h" +#include "iwl-helpers.h" + +#ifdef CONFIG_IWLWIFI_DEBUG +u32 iwl_debug_level; +#endif + +/****************************************************************************** + * + * module boiler plate + * + ******************************************************************************/ + +/* module parameters */ +int iwl_param_disable_hw_scan; +int iwl_param_debug; +int iwl_param_disable; /* def: enable radio */ +int iwl_param_antenna; /* def: 0 = both antennas (use diversity) */ +int iwl_param_hwcrypto; /* def: using software encryption */ +int iwl_param_qos_enable = 1; +int iwl_param_queues_num = IWL_MAX_NUM_QUEUES; + +/* + * module name, copyright, version, etc. + * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk + */ + +#define DRV_DESCRIPTION \ +"Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux" + +#ifdef CONFIG_IWLWIFI_DEBUG +#define VD "d" +#else +#define VD +#endif + +#ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT +#define VS "s" +#else +#define VS +#endif + +#define IWLWIFI_VERSION "1.1.17k" VD VS +#define DRV_COPYRIGHT "Copyright(c) 2003-2007 Intel Corporation" +#define DRV_VERSION IWLWIFI_VERSION + +/* Change firmware file name, using "-" and incrementing number, + * *only* when uCode interface or architecture changes so that it + * is not compatible with earlier drivers. + * This number will also appear in << 8 position of 1st dword of uCode file */ +#define IWL3945_UCODE_API "-1" + +MODULE_DESCRIPTION(DRV_DESCRIPTION); +MODULE_VERSION(DRV_VERSION); +MODULE_AUTHOR(DRV_COPYRIGHT); +MODULE_LICENSE("GPL"); + +__le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr) +{ + u16 fc = le16_to_cpu(hdr->frame_control); + int hdr_len = ieee80211_get_hdrlen(fc); + + if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA)) + return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN); + return NULL; +} + +static const struct ieee80211_hw_mode *iwl_get_hw_mode( + struct iwl_priv *priv, int mode) +{ + int i; + + for (i = 0; i < 3; i++) + if (priv->modes[i].mode == mode) + return &priv->modes[i]; + + return NULL; +} + +static int iwl_is_empty_essid(const char *essid, int essid_len) +{ + /* Single white space is for Linksys APs */ + if (essid_len == 1 && essid[0] == ' ') + return 1; + + /* Otherwise, if the entire essid is 0, we assume it is hidden */ + while (essid_len) { + essid_len--; + if (essid[essid_len] != '\0') + return 0; + } + + return 1; +} + +static const char *iwl_escape_essid(const char *essid, u8 essid_len) +{ + static char escaped[IW_ESSID_MAX_SIZE * 2 + 1]; + const char *s = essid; + char *d = escaped; + + if (iwl_is_empty_essid(essid, essid_len)) { + memcpy(escaped, "<hidden>", sizeof("<hidden>")); + return escaped; + } + + essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE); + while (essid_len--) { + if (*s == '\0') { + *d++ = '\\'; + *d++ = '0'; + s++; + } else + *d++ = *s++; + } + *d = '\0'; + return escaped; +} + +static void iwl_print_hex_dump(int level, void *p, u32 len) +{ +#ifdef CONFIG_IWLWIFI_DEBUG + if (!(iwl_debug_level & level)) + return; + + print_hex_dump(KERN_DEBUG, "iwl data: ", DUMP_PREFIX_OFFSET, 16, 1, + p, len, 1); +#endif +} + +/*************** DMA-QUEUE-GENERAL-FUNCTIONS ***** + * DMA services + * + * Theory of operation + * + * A queue is a circular buffers with 'Read' and 'Write' pointers. + * 2 empty entries always kept in the buffer to protect from overflow. + * + * For Tx queue, there are low mark and high mark limits. If, after queuing + * the packet for Tx, free space become < low mark, Tx queue stopped. When + * reclaiming packets (on 'tx done IRQ), if free space become > high mark, + * Tx queue resumed. + * + * The IWL operates with six queues, one receive queue in the device's + * sram, one transmit queue for sending commands to the device firmware, + * and four transmit queues for data. + ***************************************************/ + +static int iwl_queue_space(const struct iwl_queue *q) +{ + int s = q->last_used - q->first_empty; + + if (q->last_used > q->first_empty) + s -= q->n_bd; + + if (s <= 0) + s += q->n_window; + /* keep some reserve to not confuse empty and full situations */ + s -= 2; + if (s < 0) + s = 0; + return s; +} + +/* XXX: n_bd must be power-of-two size */ +static inline int iwl_queue_inc_wrap(int index, int n_bd) +{ + return ++index & (n_bd - 1); +} + +/* XXX: n_bd must be power-of-two size */ +static inline int iwl_queue_dec_wrap(int index, int n_bd) +{ + return --index & (n_bd - 1); +} + +static inline int x2_queue_used(const struct iwl_queue *q, int i) +{ + return q->first_empty > q->last_used ? + (i >= q->last_used && i < q->first_empty) : + !(i < q->last_used && i >= q->first_empty); +} + +static inline u8 get_cmd_index(struct iwl_queue *q, u32 index, int is_huge) +{ + if (is_huge) + return q->n_window; + + return index & (q->n_window - 1); +} + +static int iwl_queue_init(struct iwl_priv *priv, struct iwl_queue *q, + int count, int slots_num, u32 id) +{ + q->n_bd = count; + q->n_window = slots_num; + q->id = id; + + /* count must be power-of-two size, otherwise iwl_queue_inc_wrap + * and iwl_queue_dec_wrap are broken. */ + BUG_ON(!is_power_of_2(count)); + + /* slots_num must be power-of-two size, otherwise + * get_cmd_index is broken. */ + BUG_ON(!is_power_of_2(slots_num)); + + q->low_mark = q->n_window / 4; + if (q->low_mark < 4) + q->low_mark = 4; + + q->high_mark = q->n_window / 8; + if (q->high_mark < 2) + q->high_mark = 2; + + q->first_empty = q->last_used = 0; + + return 0; +} + +static int iwl_tx_queue_alloc(struct iwl_priv *priv, + struct iwl_tx_queue *txq, u32 id) +{ + struct pci_dev *dev = priv->pci_dev; + + if (id != IWL_CMD_QUEUE_NUM) { + txq->txb = kmalloc(sizeof(txq->txb[0]) * + TFD_QUEUE_SIZE_MAX, GFP_KERNEL); + if (!txq->txb) { + IWL_ERROR("kmalloc for auxilary BD " + "structures failed\n"); + goto error; + } + } else + txq->txb = NULL; + + txq->bd = pci_alloc_consistent(dev, + sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX, + &txq->q.dma_addr); + + if (!txq->bd) { + IWL_ERROR("pci_alloc_consistent(%zd) failed\n", + sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX); + goto error; + } + txq->q.id = id; + + return 0; + + error: + if (txq->txb) { + kfree(txq->txb); + txq->txb = NULL; + } + + return -ENOMEM; +} + +int iwl_tx_queue_init(struct iwl_priv *priv, + struct iwl_tx_queue *txq, int slots_num, u32 txq_id) +{ + struct pci_dev *dev = priv->pci_dev; + int len; + int rc = 0; + + /* alocate command space + one big command for scan since scan + * command is very huge the system will not have two scan at the + * same time */ + len = sizeof(struct iwl_cmd) * slots_num; + if (txq_id == IWL_CMD_QUEUE_NUM) + len += IWL_MAX_SCAN_SIZE; + txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd); + if (!txq->cmd) + return -ENOMEM; + + rc = iwl_tx_queue_alloc(priv, txq, txq_id); + if (rc) { + pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd); + + return -ENOMEM; + } + txq->need_update = 0; + + /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise + * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */ + BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1)); + iwl_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id); + + iwl_hw_tx_queue_init(priv, txq); + + return 0; +} + +/** + * iwl_tx_queue_free - Deallocate DMA queue. + * @txq: Transmit queue to deallocate. + * + * Empty queue by removing and destroying all BD's. + * Free all buffers. txq itself is not freed. + * + */ +void iwl_tx_queue_free(struct iwl_priv *priv, struct iwl_tx_queue *txq) +{ + struct iwl_queue *q = &txq->q; + struct pci_dev *dev = priv->pci_dev; + int len; + + if (q->n_bd == 0) + return; + + /* first, empty all BD's */ + for (; q->first_empty != q->last_used; + q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd)) + iwl_hw_txq_free_tfd(priv, txq); + + len = sizeof(struct iwl_cmd) * q->n_window; + if (q->id == IWL_CMD_QUEUE_NUM) + len += IWL_MAX_SCAN_SIZE; + + pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd); + + /* free buffers belonging to queue itself */ + if (txq->q.n_bd) + pci_free_consistent(dev, sizeof(struct iwl_tfd_frame) * + txq->q.n_bd, txq->bd, txq->q.dma_addr); + + if (txq->txb) { + kfree(txq->txb); + txq->txb = NULL; + } + + /* 0 fill whole structure */ + memset(txq, 0, sizeof(*txq)); +} + +const u8 BROADCAST_ADDR[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; + +/*************** STATION TABLE MANAGEMENT **** + * + * NOTE: This needs to be overhauled to better synchronize between + * how the iwl-4965.c is using iwl_hw_find_station vs. iwl-3945.c + * + * mac80211 should also be examined to determine if sta_info is duplicating + * the functionality provided here + */ + +/**************************************************************/ +#if 0 /* temparary disable till we add real remove station */ +static u8 iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap) +{ + int index = IWL_INVALID_STATION; + int i; + unsigned long flags; + + spin_lock_irqsave(&priv->sta_lock, flags); + + if (is_ap) + index = IWL_AP_ID; + else if (is_broadcast_ether_addr(addr)) + index = priv->hw_setting.bcast_sta_id; + else + for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) + if (priv->stations[i].used && + !compare_ether_addr(priv->stations[i].sta.sta.addr, + addr)) { + index = i; + break; + } + + if (unlikely(index == IWL_INVALID_STATION)) + goto out; + + if (priv->stations[index].used) { + priv->stations[index].used = 0; + priv->num_stations--; + } + + BUG_ON(priv->num_stations < 0); + +out: + spin_unlock_irqrestore(&priv->sta_lock, flags); + return 0; +} +#endif +static void iwl_clear_stations_table(struct iwl_priv *priv) +{ + unsigned long flags; + + spin_lock_irqsave(&priv->sta_lock, flags); + + priv->num_stations = 0; + memset(priv->stations, 0, sizeof(priv->stations)); + + spin_unlock_irqrestore(&priv->sta_lock, flags); +} + + +u8 iwl_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap, u8 flags) +{ + int i; + int index = IWL_INVALID_STATION; + struct iwl_station_entry *station; + unsigned long flags_spin; + DECLARE_MAC_BUF(mac); + u8 rate; + + spin_lock_irqsave(&priv->sta_lock, flags_spin); + if (is_ap) + index = IWL_AP_ID; + else if (is_broadcast_ether_addr(addr)) + index = priv->hw_setting.bcast_sta_id; + else + for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) { + if (!compare_ether_addr(priv->stations[i].sta.sta.addr, + addr)) { + index = i; + break; + } + + if (!priv->stations[i].used && + index == IWL_INVALID_STATION) + index = i; + } + + /* These twh conditions has the same outcome but keep them separate + since they have different meaning */ + if (unlikely(index == IWL_INVALID_STATION)) { + spin_unlock_irqrestore(&priv->sta_lock, flags_spin); + return index; + } + + if (priv->stations[index].used && + !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) { + spin_unlock_irqrestore(&priv->sta_lock, flags_spin); + return index; + } + + IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr)); + station = &priv->stations[index]; + station->used = 1; + priv->num_stations++; + + memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd)); + memcpy(station->sta.sta.addr, addr, ETH_ALEN); + station->sta.mode = 0; + station->sta.sta.sta_id = index; + station->sta.station_flags = 0; + + rate = (priv->phymode == MODE_IEEE80211A) ? IWL_RATE_6M_PLCP : + IWL_RATE_1M_PLCP | priv->hw_setting.cck_flag; + + /* Turn on both antennas for the station... */ + station->sta.rate_n_flags = + iwl_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK); + station->current_rate.rate_n_flags = + le16_to_cpu(station->sta.rate_n_flags); + + spin_unlock_irqrestore(&priv->sta_lock, flags_spin); + iwl_send_add_station(priv, &station->sta, flags); + return index; + +} + +/*************** DRIVER STATUS FUNCTIONS *****/ + +static inline int iwl_is_ready(struct iwl_priv *priv) +{ + /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are + * set but EXIT_PENDING is not */ + return test_bit(STATUS_READY, &priv->status) && + test_bit(STATUS_GEO_CONFIGURED, &priv->status) && + !test_bit(STATUS_EXIT_PENDING, &priv->status); +} + +static inline int iwl_is_alive(struct iwl_priv *priv) +{ + return test_bit(STATUS_ALIVE, &priv->status); +} + +static inline int iwl_is_init(struct iwl_priv *priv) +{ + return test_bit(STATUS_INIT, &priv->status); +} + +static inline int iwl_is_rfkill(struct iwl_priv *priv) +{ + return test_bit(STATUS_RF_KILL_HW, &priv->status) || + test_bit(STATUS_RF_KILL_SW, &priv->status); +} + +static inline int iwl_is_ready_rf(struct iwl_priv *priv) +{ + + if (iwl_is_rfkill(priv)) + return 0; + + return iwl_is_ready(priv); +} + +/*************** HOST COMMAND QUEUE FUNCTIONS *****/ + +#define IWL_CMD(x) case x : return #x + +static const char *get_cmd_string(u8 cmd) +{ + switch (cmd) { + IWL_CMD(REPLY_ALIVE); + IWL_CMD(REPLY_ERROR); + IWL_CMD(REPLY_RXON); + IWL_CMD(REPLY_RXON_ASSOC); + IWL_CMD(REPLY_QOS_PARAM); + IWL_CMD(REPLY_RXON_TIMING); + IWL_CMD(REPLY_ADD_STA); + IWL_CMD(REPLY_REMOVE_STA); + IWL_CMD(REPLY_REMOVE_ALL_STA); + IWL_CMD(REPLY_3945_RX); + IWL_CMD(REPLY_TX); + IWL_CMD(REPLY_RATE_SCALE); + IWL_CMD(REPLY_LEDS_CMD); + IWL_CMD(REPLY_TX_LINK_QUALITY_CMD); + IWL_CMD(RADAR_NOTIFICATION); + IWL_CMD(REPLY_QUIET_CMD); + IWL_CMD(REPLY_CHANNEL_SWITCH); + IWL_CMD(CHANNEL_SWITCH_NOTIFICATION); + IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD); + IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION); + IWL_CMD(POWER_TABLE_CMD); + IWL_CMD(PM_SLEEP_NOTIFICATION); + IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC); + IWL_CMD(REPLY_SCAN_CMD); + IWL_CMD(REPLY_SCAN_ABORT_CMD); + IWL_CMD(SCAN_START_NOTIFICATION); + IWL_CMD(SCAN_RESULTS_NOTIFICATION); + IWL_CMD(SCAN_COMPLETE_NOTIFICATION); + IWL_CMD(BEACON_NOTIFICATION); + IWL_CMD(REPLY_TX_BEACON); + IWL_CMD(WHO_IS_AWAKE_NOTIFICATION); + IWL_CMD(QUIET_NOTIFICATION); + IWL_CMD(REPLY_TX_PWR_TABLE_CMD); + IWL_CMD(MEASURE_ABORT_NOTIFICATION); + IWL_CMD(REPLY_BT_CONFIG); + IWL_CMD(REPLY_STATISTICS_CMD); + IWL_CMD(STATISTICS_NOTIFICATION); + IWL_CMD(REPLY_CARD_STATE_CMD); + IWL_CMD(CARD_STATE_NOTIFICATION); + IWL_CMD(MISSED_BEACONS_NOTIFICATION); + default: + return "UNKNOWN"; + + } +} + +#define HOST_COMPLETE_TIMEOUT (HZ / 2) + +/** + * iwl_enqueue_hcmd - enqueue a uCode command + * @priv: device private data point + * @cmd: a point to the ucode command structure + * + * The function returns < 0 values to indicate the operation is + * failed. On success, it turns the index (> 0) of command in the + * command queue. + */ +static int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd) +{ + struct iwl_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM]; + struct iwl_queue *q = &txq->q; + struct iwl_tfd_frame *tfd; + u32 *control_flags; + struct iwl_cmd *out_cmd; + u32 idx; + u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr)); + dma_addr_t phys_addr; + int pad; + u16 count; + int ret; + unsigned long flags; + + /* If any of the command structures end up being larger than + * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then + * we will need to increase the size of the TFD entries */ + BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) && + !(cmd->meta.flags & CMD_SIZE_HUGE)); + + if (iwl_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) { + IWL_ERROR("No space for Tx\n"); + return -ENOSPC; + } + + spin_lock_irqsave(&priv->hcmd_lock, flags); + + tfd = &txq->bd[q->first_empty]; + memset(tfd, 0, sizeof(*tfd)); + + control_flags = (u32 *) tfd; + + idx = get_cmd_index(q, q->first_empty, cmd->meta.flags & CMD_SIZE_HUGE); + out_cmd = &txq->cmd[idx]; + + out_cmd->hdr.cmd = cmd->id; + memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta)); + memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len); + + /* At this point, the out_cmd now has all of the incoming cmd + * information */ + + out_cmd->hdr.flags = 0; + out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) | + INDEX_TO_SEQ(q->first_empty)); + if (out_cmd->meta.flags & CMD_SIZE_HUGE) + out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME); + + phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx + + offsetof(struct iwl_cmd, hdr); + iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size); + + pad = U32_PAD(cmd->len); + count = TFD_CTL_COUNT_GET(*control_flags); + *control_flags = TFD_CTL_COUNT_SET(count) | TFD_CTL_PAD_SET(pad); + + IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, " + "%d bytes at %d[%d]:%d\n", + get_cmd_string(out_cmd->hdr.cmd), + out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence), + fix_size, q->first_empty, idx, IWL_CMD_QUEUE_NUM); + + txq->need_update = 1; + q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd); + ret = iwl_tx_queue_update_write_ptr(priv, txq); + + spin_unlock_irqrestore(&priv->hcmd_lock, flags); + return ret ? ret : idx; +} + +int iwl_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd) +{ + int ret; + + BUG_ON(!(cmd->meta.flags & CMD_ASYNC)); + + /* An asynchronous command can not expect an SKB to be set. */ + BUG_ON(cmd->meta.flags & CMD_WANT_SKB); + + /* An asynchronous command MUST have a callback. */ + BUG_ON(!cmd->meta.u.callback); + + if (test_bit(STATUS_EXIT_PENDING, &priv->status)) + return -EBUSY; + + ret = iwl_enqueue_hcmd(priv, cmd); + if (ret < 0) { + IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n", + get_cmd_string(cmd->id), ret); + return ret; + } + return 0; +} + +int iwl_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd) +{ + int cmd_idx; + int ret; + static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */ + + BUG_ON(cmd->meta.flags & CMD_ASYNC); + + /* A synchronous command can not have a callback set. */ + BUG_ON(cmd->meta.u.callback != NULL); + + if (atomic_xchg(&entry, 1)) { + IWL_ERROR("Error sending %s: Already sending a host command\n", + get_cmd_string(cmd->id)); + return -EBUSY; + } + + set_bit(STATUS_HCMD_ACTIVE, &priv->status); + + if (cmd->meta.flags & CMD_WANT_SKB) + cmd->meta.source = &cmd->meta; + + cmd_idx = iwl_enqueue_hcmd(priv, cmd); + if (cmd_idx < 0) { + ret = cmd_idx; + IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n", + get_cmd_string(cmd->id), ret); + goto out; + } + + ret = wait_event_interruptible_timeout(priv->wait_command_queue, + !test_bit(STATUS_HCMD_ACTIVE, &priv->status), + HOST_COMPLETE_TIMEOUT); + if (!ret) { + if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) { + IWL_ERROR("Error sending %s: time out after %dms.\n", + get_cmd_string(cmd->id), + jiffies_to_msecs(HOST_COMPLETE_TIMEOUT)); + + clear_bit(STATUS_HCMD_ACTIVE, &priv->status); + ret = -ETIMEDOUT; + goto cancel; + } + } + + if (test_bit(STATUS_RF_KILL_HW, &priv->status)) { + IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n", + get_cmd_string(cmd->id)); + ret = -ECANCELED; + goto fail; + } + if (test_bit(STATUS_FW_ERROR, &priv->status)) { + IWL_DEBUG_INFO("Command %s failed: FW Error\n", + get_cmd_string(cmd->id)); + ret = -EIO; + goto fail; + } + if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) { + IWL_ERROR("Error: Response NULL in '%s'\n", + get_cmd_string(cmd->id)); + ret = -EIO; + goto out; + } + + ret = 0; + goto out; + +cancel: + if (cmd->meta.flags & CMD_WANT_SKB) { + struct iwl_cmd *qcmd; + + /* Cancel the CMD_WANT_SKB flag for the cmd in the + * TX cmd queue. Otherwise in case the cmd comes + * in later, it will possibly set an invalid + * address (cmd->meta.source). */ + qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx]; + qcmd->meta.flags &= ~CMD_WANT_SKB; + } +fail: + if (cmd->meta.u.skb) { + dev_kfree_skb_any(cmd->meta.u.skb); + cmd->meta.u.skb = NULL; + } +out: + atomic_set(&entry, 0); + return ret; +} + +int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd) +{ + /* A command can not be asynchronous AND expect an SKB to be set. */ + BUG_ON((cmd->meta.flags & CMD_ASYNC) && + (cmd->meta.flags & CMD_WANT_SKB)); + + if (cmd->meta.flags & CMD_ASYNC) + return iwl_send_cmd_async(priv, cmd); + + return iwl_send_cmd_sync(priv, cmd); +} + +int iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data) +{ + struct iwl_host_cmd cmd = { + .id = id, + .len = len, + .data = data, + }; + + return iwl_send_cmd_sync(priv, &cmd); +} + +static int __must_check iwl_send_cmd_u32(struct iwl_priv *priv, u8 id, u32 val) +{ + struct iwl_host_cmd cmd = { + .id = id, + .len = sizeof(val), + .data = &val, + }; + + return iwl_send_cmd_sync(priv, &cmd); +} + +int iwl_send_statistics_request(struct iwl_priv *priv) +{ + return iwl_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0); +} + +/** + * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON + * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz + * @channel: Any channel valid for the requested phymode + + * In addition to setting the staging RXON, priv->phymode is also set. + * + * NOTE: Does not commit to the hardware; it sets appropriate bit fields + * in the staging RXON flag structure based on the phymode + */ +static int iwl_set_rxon_channel(struct iwl_priv *priv, u8 phymode, u16 channel) +{ + if (!iwl_get_channel_info(priv, phymode, channel)) { + IWL_DEBUG_INFO("Could not set channel to %d [%d]\n", + channel, phymode); + return -EINVAL; + } + + if ((le16_to_cpu(priv->staging_rxon.channel) == channel) && + (priv->phymode == phymode)) + return 0; + + priv->staging_rxon.channel = cpu_to_le16(channel); + if (phymode == MODE_IEEE80211A) + priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK; + else + priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK; + + priv->phymode = phymode; + + IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, phymode); + + return 0; +} + +/** + * iwl_check_rxon_cmd - validate RXON structure is valid + * + * NOTE: This is really only useful during development and can eventually + * be #ifdef'd out once the driver is stable and folks aren't actively + * making changes + */ +static int iwl_check_rxon_cmd(struct iwl_rxon_cmd *rxon) +{ + int error = 0; + int counter = 1; + + if (rxon->flags & RXON_FLG_BAND_24G_MSK) { + error |= le32_to_cpu(rxon->flags & + (RXON_FLG_TGJ_NARROW_BAND_MSK | + RXON_FLG_RADAR_DETECT_MSK)); + if (error) + IWL_WARNING("check 24G fields %d | %d\n", + counter++, error); + } else { + error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ? + 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK); + if (error) + IWL_WARNING("check 52 fields %d | %d\n", + counter++, error); + error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK); + if (error) + IWL_WARNING("check 52 CCK %d | %d\n", + counter++, error); + } + error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1; + if (error) + IWL_WARNING("check mac addr %d | %d\n", counter++, error); + + /* make sure basic rates 6Mbps and 1Mbps are supported */ + error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) && + ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0)); + if (error) + IWL_WARNING("check basic rate %d | %d\n", counter++, error); + + error |= (le16_to_cpu(rxon->assoc_id) > 2007); + if (error) + IWL_WARNING("check assoc id %d | %d\n", counter++, error); + + error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) + == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)); + if (error) + IWL_WARNING("check CCK and short slot %d | %d\n", + counter++, error); + + error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) + == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)); + if (error) + IWL_WARNING("check CCK & auto detect %d | %d\n", + counter++, error); + + error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK | + RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK); + if (error) + IWL_WARNING("check TGG and auto detect %d | %d\n", + counter++, error); + + if ((rxon->flags & RXON_FLG_DIS_DIV_MSK)) + error |= ((rxon->flags & (RXON_FLG_ANT_B_MSK | + RXON_FLG_ANT_A_MSK)) == 0); + if (error) + IWL_WARNING("check antenna %d %d\n", counter++, error); + + if (error) + IWL_WARNING("Tuning to channel %d\n", + le16_to_cpu(rxon->channel)); + + if (error) { + IWL_ERROR("Not a valid iwl_rxon_assoc_cmd field values\n"); + return -1; + } + return 0; +} + +/** + * iwl_full_rxon_required - determine if RXON_ASSOC can be used in RXON commit + * @priv: staging_rxon is comapred to active_rxon + * + * If the RXON structure is changing sufficient to require a new + * tune or to clear and reset the RXON_FILTER_ASSOC_MSK then return 1 + * to indicate a new tune is required. + */ +static int iwl_full_rxon_required(struct iwl_priv *priv) +{ + + /* These items are only settable from the full RXON command */ + if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) || + compare_ether_addr(priv->staging_rxon.bssid_addr, + priv->active_rxon.bssid_addr) || + compare_ether_addr(priv->staging_rxon.node_addr, + priv->active_rxon.node_addr) || + compare_ether_addr(priv->staging_rxon.wlap_bssid_addr, + priv->active_rxon.wlap_bssid_addr) || + (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) || + (priv->staging_rxon.channel != priv->active_rxon.channel) || + (priv->staging_rxon.air_propagation != + priv->active_rxon.air_propagation) || + (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id)) + return 1; + + /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can + * be updated with the RXON_ASSOC command -- however only some + * flag transitions are allowed using RXON_ASSOC */ + + /* Check if we are not switching bands */ + if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) != + (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)) + return 1; + + /* Check if we are switching association toggle */ + if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) != + (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) + return 1; + + return 0; +} + +static int iwl_send_rxon_assoc(struct iwl_priv *priv) +{ + int rc = 0; + struct iwl_rx_packet *res = NULL; + struct iwl_rxon_assoc_cmd rxon_assoc; + struct iwl_host_cmd cmd = { + .id = REPLY_RXON_ASSOC, + .len = sizeof(rxon_assoc), + .meta.flags = CMD_WANT_SKB, + .data = &rxon_assoc, + }; + const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon; + const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon; + + if ((rxon1->flags == rxon2->flags) && + (rxon1->filter_flags == rxon2->filter_flags) && + (rxon1->cck_basic_rates == rxon2->cck_basic_rates) && + (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) { + IWL_DEBUG_INFO("Using current RXON_ASSOC. Not resending.\n"); + return 0; + } + + rxon_assoc.flags = priv->staging_rxon.flags; + rxon_assoc.filter_flags = priv->staging_rxon.filter_flags; + rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates; + rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates; + rxon_assoc.reserved = 0; + + rc = iwl_send_cmd_sync(priv, &cmd); + if (rc) + return rc; + + res = (struct iwl_rx_packet *)cmd.meta.u.skb->data; + if (res->hdr.flags & IWL_CMD_FAILED_MSK) { + IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n"); + rc = -EIO; + } + + priv->alloc_rxb_skb--; + dev_kfree_skb_any(cmd.meta.u.skb); + + return rc; +} + +/** + * iwl_commit_rxon - commit staging_rxon to hardware + * + * The RXON command in staging_rxon is commited to the hardware and + * the active_rxon structure is updated with the new data. This + * function correctly transitions out of the RXON_ASSOC_MSK state if + * a HW tune is required based on the RXON structure changes. + */ +static int iwl_commit_rxon(struct iwl_priv *priv) +{ + /* cast away the const for active_rxon in this function */ + struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon; + int rc = 0; + DECLARE_MAC_BUF(mac); + + if (!iwl_is_alive(priv)) + return -1; + + /* always get timestamp with Rx frame */ + priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK; + + /* select antenna */ + priv->staging_rxon.flags &= + ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK); + priv->staging_rxon.flags |= iwl3945_get_antenna_flags(priv); + + rc = iwl_check_rxon_cmd(&priv->staging_rxon); + if (rc) { + IWL_ERROR("Invalid RXON configuration. Not committing.\n"); + return -EINVAL; + } + + /* If we don't need to send a full RXON, we can use + * iwl_rxon_assoc_cmd which is used to reconfigure filter + * and other flags for the current radio configuration. */ + if (!iwl_full_rxon_required(priv)) { + rc = iwl_send_rxon_assoc(priv); + if (rc) { + IWL_ERROR("Error setting RXON_ASSOC " + "configuration (%d).\n", rc); + return rc; + } + + memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon)); + + return 0; + } + + /* If we are currently associated and the new config requires + * an RXON_ASSOC and the new config wants the associated mask enabled, + * we must clear the associated from the active configuration + * before we apply the new config */ + if (iwl_is_associated(priv) && + (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) { + IWL_DEBUG_INFO("Toggling associated bit on current RXON\n"); + active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK; + + rc = iwl_send_cmd_pdu(priv, REPLY_RXON, + sizeof(struct iwl_rxon_cmd), + &priv->active_rxon); + + /* If the mask clearing failed then we set + * active_rxon back to what it was previously */ + if (rc) { + active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK; + IWL_ERROR("Error clearing ASSOC_MSK on current " + "configuration (%d).\n", rc); + return rc; + } + } + + IWL_DEBUG_INFO("Sending RXON\n" + "* with%s RXON_FILTER_ASSOC_MSK\n" + "* channel = %d\n" + "* bssid = %s\n", + ((priv->staging_rxon.filter_flags & + RXON_FILTER_ASSOC_MSK) ? "" : "out"), + le16_to_cpu(priv->staging_rxon.channel), + print_mac(mac, priv->staging_rxon.bssid_addr)); + + /* Apply the new configuration */ + rc = iwl_send_cmd_pdu(priv, REPLY_RXON, + sizeof(struct iwl_rxon_cmd), &priv->staging_rxon); + if (rc) { + IWL_ERROR("Error setting new configuration (%d).\n", rc); + return rc; + } + + memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon)); + + iwl_clear_stations_table(priv); + + /* If we issue a new RXON command which required a tune then we must + * send a new TXPOWER command or we won't be able to Tx any frames */ + rc = iwl_hw_reg_send_txpower(priv); + if (rc) { + IWL_ERROR("Error setting Tx power (%d).\n", rc); + return rc; + } + + /* Add the broadcast address so we can send broadcast frames */ + if (iwl_add_station(priv, BROADCAST_ADDR, 0, 0) == + IWL_INVALID_STATION) { + IWL_ERROR("Error adding BROADCAST address for transmit.\n"); + return -EIO; + } + + /* If we have set the ASSOC_MSK and we are in BSS mode then + * add the IWL_AP_ID to the station rate table */ + if (iwl_is_associated(priv) && + (priv->iw_mode == IEEE80211_IF_TYPE_STA)) + if (iwl_add_station(priv, priv->active_rxon.bssid_addr, 1, 0) + == IWL_INVALID_STATION) { + IWL_ERROR("Error adding AP address for transmit.\n"); + return -EIO; + } + + /* Init the hardware's rate fallback order based on the + * phymode */ + rc = iwl3945_init_hw_rate_table(priv); + if (rc) { + IWL_ERROR("Error setting HW rate table: %02X\n", rc); + return -EIO; + } + + return 0; +} + +static int iwl_send_bt_config(struct iwl_priv *priv) +{ + struct iwl_bt_cmd bt_cmd = { + .flags = 3, + .lead_time = 0xAA, + .max_kill = 1, + .kill_ack_mask = 0, + .kill_cts_mask = 0, + }; + + return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG, + sizeof(struct iwl_bt_cmd), &bt_cmd); +} + +static int iwl_send_scan_abort(struct iwl_priv *priv) +{ + int rc = 0; + struct iwl_rx_packet *res; + struct iwl_host_cmd cmd = { + .id = REPLY_SCAN_ABORT_CMD, + .meta.flags = CMD_WANT_SKB, + }; + + /* If there isn't a scan actively going on in the hardware + * then we are in between scan bands and not actually + * actively scanning, so don't send the abort command */ + if (!test_bit(STATUS_SCAN_HW, &priv->status)) { + clear_bit(STATUS_SCAN_ABORTING, &priv->status); + return 0; + } + + rc = iwl_send_cmd_sync(priv, &cmd); + if (rc) { + clear_bit(STATUS_SCAN_ABORTING, &priv->status); + return rc; + } + + res = (struct iwl_rx_packet *)cmd.meta.u.skb->data; + if (res->u.status != CAN_ABORT_STATUS) { + /* The scan abort will return 1 for success or + * 2 for "failure". A failure condition can be + * due to simply not being in an active scan which + * can occur if we send the scan abort before we + * the microcode has notified us that a scan is + * completed. */ + IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status); + clear_bit(STATUS_SCAN_ABORTING, &priv->status); + clear_bit(STATUS_SCAN_HW, &priv->status); + } + + dev_kfree_skb_any(cmd.meta.u.skb); + + return rc; +} + +static int iwl_card_state_sync_callback(struct iwl_priv *priv, + struct iwl_cmd *cmd, + struct sk_buff *skb) +{ + return 1; +} + +/* + * CARD_STATE_CMD + * + * Use: Sets the internal card state to enable, disable, or halt + * + * When in the 'enable' state the card operates as normal. + * When in the 'disable' state, the card enters into a low power mode. + * When in the 'halt' state, the card is shut down and must be fully + * restarted to come back on. + */ +static int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag) +{ + struct iwl_host_cmd cmd = { + .id = REPLY_CARD_STATE_CMD, + .len = sizeof(u32), + .data = &flags, + .meta.flags = meta_flag, + }; + + if (meta_flag & CMD_ASYNC) + cmd.meta.u.callback = iwl_card_state_sync_callback; + + return iwl_send_cmd(priv, &cmd); +} + +static int iwl_add_sta_sync_callback(struct iwl_priv *priv, + struct iwl_cmd *cmd, struct sk_buff *skb) +{ + struct iwl_rx_packet *res = NULL; + + if (!skb) { + IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n"); + return 1; + } + + res = (struct iwl_rx_packet *)skb->data; + if (res->hdr.flags & IWL_CMD_FAILED_MSK) { + IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n", + res->hdr.flags); + return 1; + } + + switch (res->u.add_sta.status) { + case ADD_STA_SUCCESS_MSK: + break; + default: + break; + } + + /* We didn't cache the SKB; let the caller free it */ + return 1; +} + +int iwl_send_add_station(struct iwl_priv *priv, + struct iwl_addsta_cmd *sta, u8 flags) +{ + struct iwl_rx_packet *res = NULL; + int rc = 0; + struct iwl_host_cmd cmd = { + .id = REPLY_ADD_STA, + .len = sizeof(struct iwl_addsta_cmd), + .meta.flags = flags, + .data = sta, + }; + + if (flags & CMD_ASYNC) + cmd.meta.u.callback = iwl_add_sta_sync_callback; + else + cmd.meta.flags |= CMD_WANT_SKB; + + rc = iwl_send_cmd(priv, &cmd); + + if (rc || (flags & CMD_ASYNC)) + return rc; + + res = (struct iwl_rx_packet *)cmd.meta.u.skb->data; + if (res->hdr.flags & IWL_CMD_FAILED_MSK) { + IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n", + res->hdr.flags); + rc = -EIO; + } + + if (rc == 0) { + switch (res->u.add_sta.status) { + case ADD_STA_SUCCESS_MSK: + IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n"); + break; + default: + rc = -EIO; + IWL_WARNING("REPLY_ADD_STA failed\n"); + break; + } + } + + priv->alloc_rxb_skb--; + dev_kfree_skb_any(cmd.meta.u.skb); + + return rc; +} + +static int iwl_update_sta_key_info(struct iwl_priv *priv, + struct ieee80211_key_conf *keyconf, + u8 sta_id) +{ + unsigned long flags; + __le16 key_flags = 0; + + switch (keyconf->alg) { + case ALG_CCMP: + key_flags |= STA_KEY_FLG_CCMP; + key_flags |= cpu_to_le16( + keyconf->keyidx << STA_KEY_FLG_KEYID_POS); + key_flags &= ~STA_KEY_FLG_INVALID; + break; + case ALG_TKIP: + case ALG_WEP: + return -EINVAL; + default: + return -EINVAL; + } + spin_lock_irqsave(&priv->sta_lock, flags); + priv->stations[sta_id].keyinfo.alg = keyconf->alg; + priv->stations[sta_id].keyinfo.keylen = keyconf->keylen; + memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, + keyconf->keylen); + + memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, + keyconf->keylen); + priv->stations[sta_id].sta.key.key_flags = key_flags; + priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK; + priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; + + spin_unlock_irqrestore(&priv->sta_lock, flags); + + IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n"); + iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0); + return 0; +} + +static int iwl_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id) +{ + unsigned long flags; + + spin_lock_irqsave(&priv->sta_lock, flags); + memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key)); + memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl_keyinfo)); + priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC; + priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK; + priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; + spin_unlock_irqrestore(&priv->sta_lock, flags); + + IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n"); + iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0); + return 0; +} + +static void iwl_clear_free_frames(struct iwl_priv *priv) +{ + struct list_head *element; + + IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n", + priv->frames_count); + + while (!list_empty(&priv->free_frames)) { + element = priv->free_frames.next; + list_del(element); + kfree(list_entry(element, struct iwl_frame, list)); + priv->frames_count--; + } + + if (priv->frames_count) { + IWL_WARNING("%d frames still in use. Did we lose one?\n", + priv->frames_count); + priv->frames_count = 0; + } +} + +static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv) +{ + struct iwl_frame *frame; + struct list_head *element; + if (list_empty(&priv->free_frames)) { + frame = kzalloc(sizeof(*frame), GFP_KERNEL); + if (!frame) { + IWL_ERROR("Could not allocate frame!\n"); + return NULL; + } + + priv->frames_count++; + return frame; + } + + element = priv->free_frames.next; + list_del(element); + return list_entry(element, struct iwl_frame, list); +} + +static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame) +{ + memset(frame, 0, sizeof(*frame)); + list_add(&frame->list, &priv->free_frames); +} + +unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv, + struct ieee80211_hdr *hdr, + const u8 *dest, int left) +{ + + if (!iwl_is_associated(priv) || !priv->ibss_beacon || + ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) && + (priv->iw_mode != IEEE80211_IF_TYPE_AP))) + return 0; + + if (priv->ibss_beacon->len > left) + return 0; + + memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len); + + return priv->ibss_beacon->len; +} + +static int iwl_rate_index_from_plcp(int plcp) +{ + int i = 0; + + for (i = 0; i < IWL_RATE_COUNT; i++) + if (iwl_rates[i].plcp == plcp) + return i; + return -1; +} + +static u8 iwl_rate_get_lowest_plcp(int rate_mask) +{ + u8 i; + + for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID; + i = iwl_rates[i].next_ieee) { + if (rate_mask & (1 << i)) + return iwl_rates[i].plcp; + } + + return IWL_RATE_INVALID; +} + +static int iwl_send_beacon_cmd(struct iwl_priv *priv) +{ + struct iwl_frame *frame; + unsigned int frame_size; + int rc; + u8 rate; + + frame = iwl_get_free_frame(priv); + + if (!frame) { + IWL_ERROR("Could not obtain free frame buffer for beacon " + "command.\n"); + return -ENOMEM; + } + + if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) { + rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic & + 0xFF0); + if (rate == IWL_INVALID_RATE) + rate = IWL_RATE_6M_PLCP; + } else { + rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic & 0xF); + if (rate == IWL_INVALID_RATE) + rate = IWL_RATE_1M_PLCP; + } + + frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate); + + rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size, + &frame->u.cmd[0]); + + iwl_free_frame(priv, frame); + + return rc; +} + +/****************************************************************************** + * + * EEPROM related functions + * + ******************************************************************************/ + +static void get_eeprom_mac(struct iwl_priv *priv, u8 *mac) +{ + memcpy(mac, priv->eeprom.mac_address, 6); +} + +/** + * iwl_eeprom_init - read EEPROM contents + * + * Load the EEPROM from adapter into priv->eeprom + * + * NOTE: This routine uses the non-debug IO access functions. + */ +int iwl_eeprom_init(struct iwl_priv *priv) +{ + u16 *e = (u16 *)&priv->eeprom; + u32 gp = iwl_read32(priv, CSR_EEPROM_GP); + u32 r; + int sz = sizeof(priv->eeprom); + int rc; + int i; + u16 addr; + + /* The EEPROM structure has several padding buffers within it + * and when adding new EEPROM maps is subject to programmer errors + * which may be very difficult to identify without explicitly + * checking the resulting size of the eeprom map. */ + BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE); + + if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) { + IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp); + return -ENOENT; + } + + rc = iwl_eeprom_aqcuire_semaphore(priv); + if (rc < 0) { + IWL_ERROR("Failed to aqcuire EEPROM semaphore.\n"); + return -ENOENT; + } + + /* eeprom is an array of 16bit values */ + for (addr = 0; addr < sz; addr += sizeof(u16)) { + _iwl_write32(priv, CSR_EEPROM_REG, addr << 1); + _iwl_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD); + + for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT; + i += IWL_EEPROM_ACCESS_DELAY) { + r = _iwl_read_restricted(priv, CSR_EEPROM_REG); + if (r & CSR_EEPROM_REG_READ_VALID_MSK) + break; + udelay(IWL_EEPROM_ACCESS_DELAY); + } + + if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) { + IWL_ERROR("Time out reading EEPROM[%d]", addr); + return -ETIMEDOUT; + } + e[addr / 2] = le16_to_cpu(r >> 16); + } + + return 0; +} + +/****************************************************************************** + * + * Misc. internal state and helper functions + * + ******************************************************************************/ +#ifdef CONFIG_IWLWIFI_DEBUG + +/** + * iwl_report_frame - dump frame to syslog during debug sessions + * + * hack this function to show different aspects of received frames, + * including selective frame dumps. + * group100 parameter selects whether to show 1 out of 100 good frames. + * + * TODO: ieee80211_hdr stuff is common to 3945 and 4965, so frame type + * info output is okay, but some of this stuff (e.g. iwl_rx_frame_stats) + * is 3945-specific and gives bad output for 4965. Need to split the + * functionality, keep common stuff here. + */ +void iwl_report_frame(struct iwl_priv *priv, + struct iwl_rx_packet *pkt, + struct ieee80211_hdr *header, int group100) +{ + u32 to_us; + u32 print_summary = 0; + u32 print_dump = 0; /* set to 1 to dump all frames' contents */ + u32 hundred = 0; + u32 dataframe = 0; + u16 fc; + u16 seq_ctl; + u16 channel; + u16 phy_flags; + int rate_sym; + u16 length; + u16 status; + u16 bcn_tmr; + u32 tsf_low; + u64 tsf; + u8 rssi; + u8 agc; + u16 sig_avg; + u16 noise_diff; + struct iwl_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt); + struct iwl_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt); + struct iwl_rx_frame_end *rx_end = IWL_RX_END(pkt); + u8 *data = IWL_RX_DATA(pkt); + + /* MAC header */ + fc = le16_to_cpu(header->frame_control); + seq_ctl = le16_to_cpu(header->seq_ctrl); + + /* metadata */ + channel = le16_to_cpu(rx_hdr->channel); + phy_flags = le16_to_cpu(rx_hdr->phy_flags); + rate_sym = rx_hdr->rate; + length = le16_to_cpu(rx_hdr->len); + + /* end-of-frame status and timestamp */ + status = le32_to_cpu(rx_end->status); + bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp); + tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff; + tsf = le64_to_cpu(rx_end->timestamp); + + /* signal statistics */ + rssi = rx_stats->rssi; + agc = rx_stats->agc; + sig_avg = le16_to_cpu(rx_stats->sig_avg); + noise_diff = le16_to_cpu(rx_stats->noise_diff); + + to_us = !compare_ether_addr(header->addr1, priv->mac_addr); + + /* if data frame is to us and all is good, + * (optionally) print summary for only 1 out of every 100 */ + if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) == + (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) { + dataframe = 1; + if (!group100) + print_summary = 1; /* print each frame */ + else if (priv->framecnt_to_us < 100) { + priv->framecnt_to_us++; + print_summary = 0; + } else { + priv->framecnt_to_us = 0; + print_summary = 1; + hundred = 1; + } + } else { + /* print summary for all other frames */ + print_summary = 1; + } + + if (print_summary) { + char *title; + u32 rate; + + if (hundred) + title = "100Frames"; + else if (fc & IEEE80211_FCTL_RETRY) + title = "Retry"; + else if (ieee80211_is_assoc_response(fc)) + title = "AscRsp"; + else if (ieee80211_is_reassoc_response(fc)) + title = "RasRsp"; + else if (ieee80211_is_probe_response(fc)) { + title = "PrbRsp"; + print_dump = 1; /* dump frame contents */ + } else if (ieee80211_is_beacon(fc)) { + title = "Beacon"; + print_dump = 1; /* dump frame contents */ + } else if (ieee80211_is_atim(fc)) + title = "ATIM"; + else if (ieee80211_is_auth(fc)) + title = "Auth"; + else if (ieee80211_is_deauth(fc)) + title = "DeAuth"; + else if (ieee80211_is_disassoc(fc)) + title = "DisAssoc"; + else + title = "Frame"; + + rate = iwl_rate_index_from_plcp(rate_sym); + if (rate == -1) + rate = 0; + else + rate = iwl_rates[rate].ieee / 2; + + /* print frame summary. + * MAC addresses show just the last byte (for brevity), + * but you can hack it to show more, if you'd like to. */ + if (dataframe) + IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, " + "len=%u, rssi=%d, chnl=%d, rate=%u, \n", + title, fc, header->addr1[5], + length, rssi, channel, rate); + else { + /* src/dst addresses assume managed mode */ + IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, " + "src=0x%02x, rssi=%u, tim=%lu usec, " + "phy=0x%02x, chnl=%d\n", + title, fc, header->addr1[5], + header->addr3[5], rssi, + tsf_low - priv->scan_start_tsf, + phy_flags, channel); + } + } + if (print_dump) + iwl_print_hex_dump(IWL_DL_RX, data, length); +} +#endif + +static void iwl_unset_hw_setting(struct iwl_priv *priv) +{ + if (priv->hw_setting.shared_virt) + pci_free_consistent(priv->pci_dev, + sizeof(struct iwl_shared), + priv->hw_setting.shared_virt, + priv->hw_setting.shared_phys); +} + +/** + * iwl_supported_rate_to_ie - fill in the supported rate in IE field + * + * return : set the bit for each supported rate insert in ie + */ +static u16 iwl_supported_rate_to_ie(u8 *ie, u16 supported_rate, + u16 basic_rate, int max_count) +{ + u16 ret_rates = 0, bit; + int i; + u8 *rates; + + rates = &(ie[1]); + + for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) { + if (bit & supported_rate) { + ret_rates |= bit; + rates[*ie] = iwl_rates[i].ieee | + ((bit & basic_rate) ? 0x80 : 0x00); + *ie = *ie + 1; + if (*ie >= max_count) + break; + } + } + + return ret_rates; +} + +/** + * iwl_fill_probe_req - fill in all required fields and IE for probe request + */ +static u16 iwl_fill_probe_req(struct iwl_priv *priv, + struct ieee80211_mgmt *frame, + int left, int is_direct) +{ + int len = 0; + u8 *pos = NULL; + u16 ret_rates; + + /* Make sure there is enough space for the probe request, + * two mandatory IEs and the data */ + left -= 24; + if (left < 0) + return 0; + len += 24; + + frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ); + memcpy(frame->da, BROADCAST_ADDR, ETH_ALEN); + memcpy(frame->sa, priv->mac_addr, ETH_ALEN); + memcpy(frame->bssid, BROADCAST_ADDR, ETH_ALEN); + frame->seq_ctrl = 0; + + /* fill in our indirect SSID IE */ + /* ...next IE... */ + + left -= 2; + if (left < 0) + return 0; + len += 2; + pos = &(frame->u.probe_req.variable[0]); + *pos++ = WLAN_EID_SSID; + *pos++ = 0; + + /* fill in our direct SSID IE... */ + if (is_direct) { + /* ...next IE... */ + left -= 2 + priv->essid_len; + if (left < 0) + return 0; + /* ... fill it in... */ + *pos++ = WLAN_EID_SSID; + *pos++ = priv->essid_len; + memcpy(pos, priv->essid, priv->essid_len); + pos += priv->essid_len; + len += 2 + priv->essid_len; + } + + /* fill in supported rate */ + /* ...next IE... */ + left -= 2; + if (left < 0) + return 0; + /* ... fill it in... */ + *pos++ = WLAN_EID_SUPP_RATES; + *pos = 0; + ret_rates = priv->active_rate = priv->rates_mask; + priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK; + + iwl_supported_rate_to_ie(pos, priv->active_rate, + priv->active_rate_basic, left); + len += 2 + *pos; + pos += (*pos) + 1; + ret_rates = ~ret_rates & priv->active_rate; + + if (ret_rates == 0) + goto fill_end; + + /* fill in supported extended rate */ + /* ...next IE... */ + left -= 2; + if (left < 0) + return 0; + /* ... fill it in... */ + *pos++ = WLAN_EID_EXT_SUPP_RATES; + *pos = 0; + iwl_supported_rate_to_ie(pos, ret_rates, priv->active_rate_basic, left); + if (*pos > 0) + len += 2 + *pos; + + fill_end: + return (u16)len; +} + +/* + * QoS support +*/ +#ifdef CONFIG_IWLWIFI_QOS +static int iwl_send_qos_params_command(struct iwl_priv *priv, + struct iwl_qosparam_cmd *qos) +{ + + return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM, + sizeof(struct iwl_qosparam_cmd), qos); +} + +static void iwl_reset_qos(struct iwl_priv *priv) +{ + u16 cw_min = 15; + u16 cw_max = 1023; + u8 aifs = 2; + u8 is_legacy = 0; + unsigned long flags; + int i; + + spin_lock_irqsave(&priv->lock, flags); + priv->qos_data.qos_active = 0; + + if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) { + if (priv->qos_data.qos_enable) + priv->qos_data.qos_active = 1; + if (!(priv->active_rate & 0xfff0)) { + cw_min = 31; + is_legacy = 1; + } + } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { + if (priv->qos_data.qos_enable) + priv->qos_data.qos_active = 1; + } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) { + cw_min = 31; + is_legacy = 1; + } + + if (priv->qos_data.qos_active) + aifs = 3; + + priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min); + priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max); + priv->qos_data.def_qos_parm.ac[0].aifsn = aifs; + priv->qos_data.def_qos_parm.ac[0].edca_txop = 0; + priv->qos_data.def_qos_parm.ac[0].reserved1 = 0; + + if (priv->qos_data.qos_active) { + i = 1; + priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min); + priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max); + priv->qos_data.def_qos_parm.ac[i].aifsn = 7; + priv->qos_data.def_qos_parm.ac[i].edca_txop = 0; + priv->qos_data.def_qos_parm.ac[i].reserved1 = 0; + + i = 2; + priv->qos_data.def_qos_parm.ac[i].cw_min = + cpu_to_le16((cw_min + 1) / 2 - 1); + priv->qos_data.def_qos_parm.ac[i].cw_max = + cpu_to_le16(cw_max); + priv->qos_data.def_qos_parm.ac[i].aifsn = 2; + if (is_legacy) + priv->qos_data.def_qos_parm.ac[i].edca_txop = + cpu_to_le16(6016); + else + priv->qos_data.def_qos_parm.ac[i].edca_txop = + cpu_to_le16(3008); + priv->qos_data.def_qos_parm.ac[i].reserved1 = 0; + + i = 3; + priv->qos_data.def_qos_parm.ac[i].cw_min = + cpu_to_le16((cw_min + 1) / 4 - 1); + priv->qos_data.def_qos_parm.ac[i].cw_max = + cpu_to_le16((cw_max + 1) / 2 - 1); + priv->qos_data.def_qos_parm.ac[i].aifsn = 2; + priv->qos_data.def_qos_parm.ac[i].reserved1 = 0; + if (is_legacy) + priv->qos_data.def_qos_parm.ac[i].edca_txop = + cpu_to_le16(3264); + else + priv->qos_data.def_qos_parm.ac[i].edca_txop = + cpu_to_le16(1504); + } else { + for (i = 1; i < 4; i++) { + priv->qos_data.def_qos_parm.ac[i].cw_min = + cpu_to_le16(cw_min); + priv->qos_data.def_qos_parm.ac[i].cw_max = + cpu_to_le16(cw_max); + priv->qos_data.def_qos_parm.ac[i].aifsn = aifs; + priv->qos_data.def_qos_parm.ac[i].edca_txop = 0; + priv->qos_data.def_qos_parm.ac[i].reserved1 = 0; + } + } + IWL_DEBUG_QOS("set QoS to default \n"); + + spin_unlock_irqrestore(&priv->lock, flags); +} + +static void iwl_activate_qos(struct iwl_priv *priv, u8 force) +{ + unsigned long flags; + + if (priv == NULL) + return; + + if (test_bit(STATUS_EXIT_PENDING, &priv->status)) + return; + + if (!priv->qos_data.qos_enable) + return; + + spin_lock_irqsave(&priv->lock, flags); + priv->qos_data.def_qos_parm.qos_flags = 0; + + if (priv->qos_data.qos_cap.q_AP.queue_request && + !priv->qos_data.qos_cap.q_AP.txop_request) + priv->qos_data.def_qos_parm.qos_flags |= + QOS_PARAM_FLG_TXOP_TYPE_MSK; + + if (priv->qos_data.qos_active) + priv->qos_data.def_qos_parm.qos_flags |= + QOS_PARAM_FLG_UPDATE_EDCA_MSK; + + spin_unlock_irqrestore(&priv->lock, flags); + + if (force || iwl_is_associated(priv)) { + IWL_DEBUG_QOS("send QoS cmd with Qos active %d \n", + priv->qos_data.qos_active); + + iwl_send_qos_params_command(priv, + &(priv->qos_data.def_qos_parm)); + } +} + +#endif /* CONFIG_IWLWIFI_QOS */ +/* + * Power management (not Tx power!) functions + */ +#define MSEC_TO_USEC 1024 + +#define NOSLP __constant_cpu_to_le32(0) +#define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK +#define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC) +#define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \ + __constant_cpu_to_le32(X1), \ + __constant_cpu_to_le32(X2), \ + __constant_cpu_to_le32(X3), \ + __constant_cpu_to_le32(X4)} + + +/* default power management (not Tx power) table values */ +/* for tim 0-10 */ +static struct iwl_power_vec_entry range_0[IWL_POWER_AC] = { + {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0}, + {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0}, + {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0}, + {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0}, + {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1}, + {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1} +}; + +/* for tim > 10 */ +static struct iwl_power_vec_entry range_1[IWL_POWER_AC] = { + {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0}, + {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), + SLP_VEC(1, 2, 3, 4, 0xFF)}, 0}, + {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), + SLP_VEC(2, 4, 6, 7, 0xFF)}, 0}, + {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), + SLP_VEC(2, 6, 9, 9, 0xFF)}, 0}, + {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0}, + {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), + SLP_VEC(4, 7, 10, 10, 0xFF)}, 0} +}; + +int iwl_power_init_handle(struct iwl_priv *priv) +{ + int rc = 0, i; + struct iwl_power_mgr *pow_data; + int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_AC; + u16 pci_pm; + + IWL_DEBUG_POWER("Initialize power \n"); + + pow_data = &(priv->power_data); + + memset(pow_data, 0, sizeof(*pow_data)); + + pow_data->active_index = IWL_POWER_RANGE_0; + pow_data->dtim_val = 0xffff; + + memcpy(&pow_data->pwr_range_0[0], &range_0[0], size); + memcpy(&pow_data->pwr_range_1[0], &range_1[0], size); + + rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm); + if (rc != 0) + return 0; + else { + struct iwl_powertable_cmd *cmd; + + IWL_DEBUG_POWER("adjust power command flags\n"); + + for (i = 0; i < IWL_POWER_AC; i++) { + cmd = &pow_data->pwr_range_0[i].cmd; + + if (pci_pm & 0x1) + cmd->flags &= ~IWL_POWER_PCI_PM_MSK; + else + cmd->flags |= IWL_POWER_PCI_PM_MSK; + } + } + return rc; +} + +static int iwl_update_power_cmd(struct iwl_priv *priv, + struct iwl_powertable_cmd *cmd, u32 mode) +{ + int rc = 0, i; + u8 skip; + u32 max_sleep = 0; + struct iwl_power_vec_entry *range; + u8 period = 0; + struct iwl_power_mgr *pow_data; + + if (mode > IWL_POWER_INDEX_5) { + IWL_DEBUG_POWER("Error invalid power mode \n"); + return -1; + } + pow_data = &(priv->power_data); + + if (pow_data->active_index == IWL_POWER_RANGE_0) + range = &pow_data->pwr_range_0[0]; + else + range = &pow_data->pwr_range_1[1]; + + memcpy(cmd, &range[mode].cmd, sizeof(struct iwl_powertable_cmd)); + +#ifdef IWL_MAC80211_DISABLE + if (priv->assoc_network != NULL) { + unsigned long flags; + + period = priv->assoc_network->tim.tim_period; + } +#endif /*IWL_MAC80211_DISABLE */ + skip = range[mode].no_dtim; + + if (period == 0) { + period = 1; + skip = 0; + } + + if (skip == 0) { + max_sleep = period; + cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK; + } else { + __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1]; + max_sleep = (le32_to_cpu(slp_itrvl) / period) * period; + cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK; + } + + for (i = 0; i < IWL_POWER_VEC_SIZE; i++) { + if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep) + cmd->sleep_interval[i] = cpu_to_le32(max_sleep); + } + + IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags); + IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout)); + IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout)); + IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n", + le32_to_cpu(cmd->sleep_interval[0]), + le32_to_cpu(cmd->sleep_interval[1]), + le32_to_cpu(cmd->sleep_interval[2]), + le32_to_cpu(cmd->sleep_interval[3]), + le32_to_cpu(cmd->sleep_interval[4])); + + return rc; +} + +static int iwl_send_power_mode(struct iwl_priv *priv, u32 mode) +{ + u32 final_mode = mode; + int rc; + struct iwl_powertable_cmd cmd; + + /* If on battery, set to 3, + * if plugged into AC power, set to CAM ("continuosly aware mode"), + * else user level */ + switch (mode) { + case IWL_POWER_BATTERY: + final_mode = IWL_POWER_INDEX_3; + break; + case IWL_POWER_AC: + final_mode = IWL_POWER_MODE_CAM; + break; + default: + final_mode = mode; + break; + } + + iwl_update_power_cmd(priv, &cmd, final_mode); + + rc = iwl_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd); + + if (final_mode == IWL_POWER_MODE_CAM) + clear_bit(STATUS_POWER_PMI, &priv->status); + else + set_bit(STATUS_POWER_PMI, &priv->status); + + return rc; +} + +int iwl_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header) +{ + /* Filter incoming packets to determine if they are targeted toward + * this network, discarding packets coming from ourselves */ + switch (priv->iw_mode) { + case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source | BSSID */ + /* packets from our adapter are dropped (echo) */ + if (!compare_ether_addr(header->addr2, priv->mac_addr)) + return 0; + /* {broad,multi}cast packets to our IBSS go through */ + if (is_multicast_ether_addr(header->addr1)) + return !compare_ether_addr(header->addr3, priv->bssid); + /* packets to our adapter go through */ + return !compare_ether_addr(header->addr1, priv->mac_addr); + case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */ + /* packets from our adapter are dropped (echo) */ + if (!compare_ether_addr(header->addr3, priv->mac_addr)) + return 0; + /* {broad,multi}cast packets to our BSS go through */ + if (is_multicast_ether_addr(header->addr1)) + return !compare_ether_addr(header->addr2, priv->bssid); + /* packets to our adapter go through */ + return !compare_ether_addr(header->addr1, priv->mac_addr); + } + + return 1; +} + +#define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x + +const char *iwl_get_tx_fail_reason(u32 status) +{ + switch (status & TX_STATUS_MSK) { + case TX_STATUS_SUCCESS: + return "SUCCESS"; + TX_STATUS_ENTRY(SHORT_LIMIT); + TX_STATUS_ENTRY(LONG_LIMIT); + TX_STATUS_ENTRY(FIFO_UNDERRUN); + TX_STATUS_ENTRY(MGMNT_ABORT); + TX_STATUS_ENTRY(NEXT_FRAG); + TX_STATUS_ENTRY(LIFE_EXPIRE); + TX_STATUS_ENTRY(DEST_PS); + TX_STATUS_ENTRY(ABORTED); + TX_STATUS_ENTRY(BT_RETRY); + TX_STATUS_ENTRY(STA_INVALID); + TX_STATUS_ENTRY(FRAG_DROPPED); + TX_STATUS_ENTRY(TID_DISABLE); + TX_STATUS_ENTRY(FRAME_FLUSHED); + TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL); + TX_STATUS_ENTRY(TX_LOCKED); + TX_STATUS_ENTRY(NO_BEACON_ON_RADAR); + } + + return "UNKNOWN"; +} + +/** + * iwl_scan_cancel - Cancel any currently executing HW scan + * + * NOTE: priv->mutex is not required before calling this function + */ +static int iwl_scan_cancel(struct iwl_priv *priv) +{ + if (!test_bit(STATUS_SCAN_HW, &priv->status)) { + clear_bit(STATUS_SCANNING, &priv->status); + return 0; + } + + if (test_bit(STATUS_SCANNING, &priv->status)) { + if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) { + IWL_DEBUG_SCAN("Queuing scan abort.\n"); + set_bit(STATUS_SCAN_ABORTING, &priv->status); + queue_work(priv->workqueue, &priv->abort_scan); + + } else + IWL_DEBUG_SCAN("Scan abort already in progress.\n"); + + return test_bit(STATUS_SCANNING, &priv->status); + } + + return 0; +} + +/** + * iwl_scan_cancel_timeout - Cancel any currently executing HW scan + * @ms: amount of time to wait (in milliseconds) for scan to abort + * + * NOTE: priv->mutex must be held before calling this function + */ +static int iwl_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms) +{ + unsigned long now = jiffies; + int ret; + + ret = iwl_scan_cancel(priv); + if (ret && ms) { + mutex_unlock(&priv->mutex); + while (!time_after(jiffies, now + msecs_to_jiffies(ms)) && + test_bit(STATUS_SCANNING, &priv->status)) + msleep(1); + mutex_lock(&priv->mutex); + + return test_bit(STATUS_SCANNING, &priv->status); + } + + return ret; +} + +static void iwl_sequence_reset(struct iwl_priv *priv) +{ + /* Reset ieee stats */ + + /* We don't reset the net_device_stats (ieee->stats) on + * re-association */ + + priv->last_seq_num = -1; + priv->last_frag_num = -1; + priv->last_packet_time = 0; + + iwl_scan_cancel(priv); +} + +#define MAX_UCODE_BEACON_INTERVAL 1024 +#define INTEL_CONN_LISTEN_INTERVAL __constant_cpu_to_le16(0xA) + +static __le16 iwl_adjust_beacon_interval(u16 beacon_val) +{ + u16 new_val = 0; + u16 beacon_factor = 0; + + beacon_factor = + (beacon_val + MAX_UCODE_BEACON_INTERVAL) + / MAX_UCODE_BEACON_INTERVAL; + new_val = beacon_val / beacon_factor; + + return cpu_to_le16(new_val); +} + +static void iwl_setup_rxon_timing(struct iwl_priv *priv) +{ + u64 interval_tm_unit; + u64 tsf, result; + unsigned long flags; + struct ieee80211_conf *conf = NULL; + u16 beacon_int = 0; + + conf = ieee80211_get_hw_conf(priv->hw); + + spin_lock_irqsave(&priv->lock, flags); + priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1); + priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0); + + priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL; + + tsf = priv->timestamp1; + tsf = ((tsf << 32) | priv->timestamp0); + + beacon_int = priv->beacon_int; + spin_unlock_irqrestore(&priv->lock, flags); + + if (priv->iw_mode == IEEE80211_IF_TYPE_STA) { + if (beacon_int == 0) { + priv->rxon_timing.beacon_interval = cpu_to_le16(100); + priv->rxon_timing.beacon_init_val = cpu_to_le32(102400); + } else { + priv->rxon_timing.beacon_interval = + cpu_to_le16(beacon_int); + priv->rxon_timing.beacon_interval = + iwl_adjust_beacon_interval( + le16_to_cpu(priv->rxon_timing.beacon_interval)); + } + + priv->rxon_timing.atim_window = 0; + } else { + priv->rxon_timing.beacon_interval = + iwl_adjust_beacon_interval(conf->beacon_int); + /* TODO: we need to get atim_window from upper stack + * for now we set to 0 */ + priv->rxon_timing.atim_window = 0; + } + + interval_tm_unit = + (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024); + result = do_div(tsf, interval_tm_unit); + priv->rxon_timing.beacon_init_val = + cpu_to_le32((u32) ((u64) interval_tm_unit - result)); + + IWL_DEBUG_ASSOC + ("beacon interval %d beacon timer %d beacon tim %d\n", + le16_to_cpu(priv->rxon_timing.beacon_interval), + le32_to_cpu(priv->rxon_timing.beacon_init_val), + le16_to_cpu(priv->rxon_timing.atim_window)); +} + +static int iwl_scan_initiate(struct iwl_priv *priv) +{ + if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { + IWL_ERROR("APs don't scan.\n"); + return 0; + } + + if (!iwl_is_ready_rf(priv)) { + IWL_DEBUG_SCAN("Aborting scan due to not ready.\n"); + return -EIO; + } + + if (test_bit(STATUS_SCANNING, &priv->status)) { + IWL_DEBUG_SCAN("Scan already in progress.\n"); + return -EAGAIN; + } + + if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) { + IWL_DEBUG_SCAN("Scan request while abort pending. " + "Queuing.\n"); + return -EAGAIN; + } + + IWL_DEBUG_INFO("Starting scan...\n"); + priv->scan_bands = 2; + set_bit(STATUS_SCANNING, &priv->status); + priv->scan_start = jiffies; + priv->scan_pass_start = priv->scan_start; + + queue_work(priv->workqueue, &priv->request_scan); + + return 0; +} + +static int iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt) +{ + struct iwl_rxon_cmd *rxon = &priv->staging_rxon; + + if (hw_decrypt) + rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK; + else + rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK; + + return 0; +} + +static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode) +{ + if (phymode == MODE_IEEE80211A) { + priv->staging_rxon.flags &= + ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK + | RXON_FLG_CCK_MSK); + priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK; + } else { + /* Copied from iwl_bg_post_associate() */ + if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) + priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK; + else + priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK; + + if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) + priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK; + + priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK; + priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK; + priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK; + } +} + +/* + * initilize rxon structure with default values fromm eeprom + */ +static void iwl_connection_init_rx_config(struct iwl_priv *priv) +{ + const struct iwl_channel_info *ch_info; + + memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon)); + + switch (priv->iw_mode) { + case IEEE80211_IF_TYPE_AP: + priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP; + break; + + case IEEE80211_IF_TYPE_STA: + priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS; + priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK; + break; + + case IEEE80211_IF_TYPE_IBSS: + priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS; + priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK; + priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK | + RXON_FILTER_ACCEPT_GRP_MSK; + break; + + case IEEE80211_IF_TYPE_MNTR: + priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER; + priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK | + RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK; + break; + } + +#if 0 + /* TODO: Figure out when short_preamble would be set and cache from + * that */ + if (!hw_to_local(priv->hw)->short_preamble) + priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK; + else + priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK; +#endif + + ch_info = iwl_get_channel_info(priv, priv->phymode, + le16_to_cpu(priv->staging_rxon.channel)); + + if (!ch_info) + ch_info = &priv->channel_info[0]; + + /* + * in some case A channels are all non IBSS + * in this case force B/G channel + */ + if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && + !(is_channel_ibss(ch_info))) + ch_info = &priv->channel_info[0]; + + priv->staging_rxon.channel = cpu_to_le16(ch_info->channel); + if (is_channel_a_band(ch_info)) + priv->phymode = MODE_IEEE80211A; + else + priv->phymode = MODE_IEEE80211G; + + iwl_set_flags_for_phymode(priv, priv->phymode); + + priv->staging_rxon.ofdm_basic_rates = + (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF; + priv->staging_rxon.cck_basic_rates = + (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF; +} + +static int iwl_set_mode(struct iwl_priv *priv, int mode) +{ + if (!iwl_is_ready_rf(priv)) + return -EAGAIN; + + if (mode == IEEE80211_IF_TYPE_IBSS) { + const struct iwl_channel_info *ch_info; + + ch_info = iwl_get_channel_info(priv, + priv->phymode, + le16_to_cpu(priv->staging_rxon.channel)); + + if (!ch_info || !is_channel_ibss(ch_info)) { + IWL_ERROR("channel %d not IBSS channel\n", + le16_to_cpu(priv->staging_rxon.channel)); + return -EINVAL; + } + } + + cancel_delayed_work(&priv->scan_check); + if (iwl_scan_cancel_timeout(priv, 100)) { + IWL_WARNING("Aborted scan still in progress after 100ms\n"); + IWL_DEBUG_MAC80211("leaving - scan abort failed.\n"); + return -EAGAIN; + } + + priv->iw_mode = mode; + + iwl_connection_init_rx_config(priv); + memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN); + + iwl_clear_stations_table(priv); + + iwl_commit_rxon(priv); + + return 0; +} + +static void iwl_build_tx_cmd_hwcrypto(struct iwl_priv *priv, + struct ieee80211_tx_control *ctl, + struct iwl_cmd *cmd, + struct sk_buff *skb_frag, + int last_frag) +{ + struct iwl_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo; + + switch (keyinfo->alg) { + case ALG_CCMP: + cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM; + memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen); + IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n"); + break; + + case ALG_TKIP: +#if 0 + cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP; + + if (last_frag) + memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8, + 8); + else + memset(cmd->cmd.tx.tkip_mic.byte, 0, 8); +#endif + break; + + case ALG_WEP: + cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP | + (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT; + + if (keyinfo->keylen == 13) + cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128; + + memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen); + + IWL_DEBUG_TX("Configuring packet for WEP encryption " + "with key %d\n", ctl->key_idx); + break; + + default: + printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg); + break; + } +} + +/* + * handle build REPLY_TX command notification. + */ +static void iwl_build_tx_cmd_basic(struct iwl_priv *priv, + struct iwl_cmd *cmd, + struct ieee80211_tx_control *ctrl, + struct ieee80211_hdr *hdr, + int is_unicast, u8 std_id) +{ + __le16 *qc; + u16 fc = le16_to_cpu(hdr->frame_control); + __le32 tx_flags = cmd->cmd.tx.tx_flags; + + cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; + if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) { + tx_flags |= TX_CMD_FLG_ACK_MSK; + if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) + tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; + if (ieee80211_is_probe_response(fc) && + !(le16_to_cpu(hdr->seq_ctrl) & 0xf)) + tx_flags |= TX_CMD_FLG_TSF_MSK; + } else { + tx_flags &= (~TX_CMD_FLG_ACK_MSK); + tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; + } + + cmd->cmd.tx.sta_id = std_id; + if (ieee80211_get_morefrag(hdr)) + tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK; + + qc = ieee80211_get_qos_ctrl(hdr); + if (qc) { + cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf); + tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK; + } else + tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; + + if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) { + tx_flags |= TX_CMD_FLG_RTS_MSK; + tx_flags &= ~TX_CMD_FLG_CTS_MSK; + } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) { + tx_flags &= ~TX_CMD_FLG_RTS_MSK; + tx_flags |= TX_CMD_FLG_CTS_MSK; + } + + if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK)) + tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK; + + tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK); + if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) { + if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ || + (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ) + cmd->cmd.tx.timeout.pm_frame_timeout = + cpu_to_le16(3); + else + cmd->cmd.tx.timeout.pm_frame_timeout = + cpu_to_le16(2); + } else + cmd->cmd.tx.timeout.pm_frame_timeout = 0; + + cmd->cmd.tx.driver_txop = 0; + cmd->cmd.tx.tx_flags = tx_flags; + cmd->cmd.tx.next_frame_len = 0; +} + +static int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr) +{ + int sta_id; + u16 fc = le16_to_cpu(hdr->frame_control); + + /* If this frame is broadcast or not data then use the broadcast + * station id */ + if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) || + is_multicast_ether_addr(hdr->addr1)) + return priv->hw_setting.bcast_sta_id; + + switch (priv->iw_mode) { + + /* If this frame is part of a BSS network (we're a station), then + * we use the AP's station id */ + case IEEE80211_IF_TYPE_STA: + return IWL_AP_ID; + + /* If we are an AP, then find the station, or use BCAST */ + case IEEE80211_IF_TYPE_AP: + sta_id = iwl_hw_find_station(priv, hdr->addr1); + if (sta_id != IWL_INVALID_STATION) + return sta_id; + return priv->hw_setting.bcast_sta_id; + + /* If this frame is part of a IBSS network, then we use the + * target specific station id */ + case IEEE80211_IF_TYPE_IBSS: { + DECLARE_MAC_BUF(mac); + + sta_id = iwl_hw_find_station(priv, hdr->addr1); + if (sta_id != IWL_INVALID_STATION) + return sta_id; + + sta_id = iwl_add_station(priv, hdr->addr1, 0, CMD_ASYNC); + + if (sta_id != IWL_INVALID_STATION) + return sta_id; + + IWL_DEBUG_DROP("Station %s not in station map. " + "Defaulting to broadcast...\n", + print_mac(mac, hdr->addr1)); + iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr)); + return priv->hw_setting.bcast_sta_id; + } + default: + IWL_WARNING("Unkown mode of operation: %d", priv->iw_mode); + return priv->hw_setting.bcast_sta_id; + } +} + +/* + * start REPLY_TX command process + */ +static int iwl_tx_skb(struct iwl_priv *priv, + struct sk_buff *skb, struct ieee80211_tx_control *ctl) +{ + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; + struct iwl_tfd_frame *tfd; + u32 *control_flags; + int txq_id = ctl->queue; + struct iwl_tx_queue *txq = NULL; + struct iwl_queue *q = NULL; + dma_addr_t phys_addr; + dma_addr_t txcmd_phys; + struct iwl_cmd *out_cmd = NULL; + u16 len, idx, len_org; + u8 id, hdr_len, unicast; + u8 sta_id; + u16 seq_number = 0; + u16 fc; + __le16 *qc; + u8 wait_write_ptr = 0; + unsigned long flags; + int rc; + + spin_lock_irqsave(&priv->lock, flags); + if (iwl_is_rfkill(priv)) { + IWL_DEBUG_DROP("Dropping - RF KILL\n"); + goto drop_unlock; + } + + if (!priv->interface_id) { + IWL_DEBUG_DROP("Dropping - !priv->interface_id\n"); + goto drop_unlock; + } + + if ((ctl->tx_rate & 0xFF) == IWL_INVALID_RATE) { + IWL_ERROR("ERROR: No TX rate available.\n"); + goto drop_unlock; + } + + unicast = !is_multicast_ether_addr(hdr->addr1); + id = 0; + + fc = le16_to_cpu(hdr->frame_control); + +#ifdef CONFIG_IWLWIFI_DEBUG + if (ieee80211_is_auth(fc)) + IWL_DEBUG_TX("Sending AUTH frame\n"); + else if (ieee80211_is_assoc_request(fc)) + IWL_DEBUG_TX("Sending ASSOC frame\n"); + else if (ieee80211_is_reassoc_request(fc)) + IWL_DEBUG_TX("Sending REASSOC frame\n"); +#endif + + if (!iwl_is_associated(priv) && + ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) { + IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n"); + goto drop_unlock; + } + + spin_unlock_irqrestore(&priv->lock, flags); + + hdr_len = ieee80211_get_hdrlen(fc); + sta_id = iwl_get_sta_id(priv, hdr); + if (sta_id == IWL_INVALID_STATION) { + DECLARE_MAC_BUF(mac); + + IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n", + print_mac(mac, hdr->addr1)); + goto drop; + } + + IWL_DEBUG_RATE("station Id %d\n", sta_id); + + qc = ieee80211_get_qos_ctrl(hdr); + if (qc) { + u8 tid = (u8)(le16_to_cpu(*qc) & 0xf); + seq_number = priv->stations[sta_id].tid[tid].seq_number & + IEEE80211_SCTL_SEQ; + hdr->seq_ctrl = cpu_to_le16(seq_number) | + (hdr->seq_ctrl & + __constant_cpu_to_le16(IEEE80211_SCTL_FRAG)); + seq_number += 0x10; + } + txq = &priv->txq[txq_id]; + q = &txq->q; + + spin_lock_irqsave(&priv->lock, flags); + + tfd = &txq->bd[q->first_empty]; + memset(tfd, 0, sizeof(*tfd)); + control_flags = (u32 *) tfd; + idx = get_cmd_index(q, q->first_empty, 0); + + memset(&(txq->txb[q->first_empty]), 0, sizeof(struct iwl_tx_info)); + txq->txb[q->first_empty].skb[0] = skb; + memcpy(&(txq->txb[q->first_empty].status.control), + ctl, sizeof(struct ieee80211_tx_control)); + out_cmd = &txq->cmd[idx]; + memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr)); + memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx)); + out_cmd->hdr.cmd = REPLY_TX; + out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) | + INDEX_TO_SEQ(q->first_empty))); + /* copy frags header */ + memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len); + + /* hdr = (struct ieee80211_hdr *)out_cmd->cmd.tx.hdr; */ + len = priv->hw_setting.tx_cmd_len + + sizeof(struct iwl_cmd_header) + hdr_len; + + len_org = len; + len = (len + 3) & ~3; + + if (len_org != len) + len_org = 1; + else + len_org = 0; + + txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx + + offsetof(struct iwl_cmd, hdr); + + iwl_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len); + + if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)) + iwl_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0); + + /* 802.11 null functions have no payload... */ + len = skb->len - hdr_len; + if (len) { + phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len, + len, PCI_DMA_TODEVICE); + iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len); + } + + /* If there is no payload, then only one TFD is used */ + if (!len) + *control_flags = TFD_CTL_COUNT_SET(1); + else + *control_flags = TFD_CTL_COUNT_SET(2) | + TFD_CTL_PAD_SET(U32_PAD(len)); + + len = (u16)skb->len; + out_cmd->cmd.tx.len = cpu_to_le16(len); + + /* TODO need this for burst mode later on */ + iwl_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id); + + /* set is_hcca to 0; it probably will never be implemented */ + iwl_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0); + + out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_A_MSK; + out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_B_MSK; + + if (!ieee80211_get_morefrag(hdr)) { + txq->need_update = 1; + if (qc) { + u8 tid = (u8)(le16_to_cpu(*qc) & 0xf); + priv->stations[sta_id].tid[tid].seq_number = seq_number; + } + } else { + wait_write_ptr = 1; + txq->need_update = 0; + } + + iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload, + sizeof(out_cmd->cmd.tx)); + + iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr, + ieee80211_get_hdrlen(fc)); + + q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd); + rc = iwl_tx_queue_update_write_ptr(priv, txq); + spin_unlock_irqrestore(&priv->lock, flags); + + if (rc) + return rc; + + if ((iwl_queue_space(q) < q->high_mark) + && priv->mac80211_registered) { + if (wait_write_ptr) { + spin_lock_irqsave(&priv->lock, flags); + txq->need_update = 1; + iwl_tx_queue_update_write_ptr(priv, txq); + spin_unlock_irqrestore(&priv->lock, flags); + } + + ieee80211_stop_queue(priv->hw, ctl->queue); + } + + return 0; + +drop_unlock: + spin_unlock_irqrestore(&priv->lock, flags); +drop: + return -1; +} + +static void iwl_set_rate(struct iwl_priv *priv) +{ + const struct ieee80211_hw_mode *hw = NULL; + struct ieee80211_rate *rate; + int i; + + hw = iwl_get_hw_mode(priv, priv->phymode); + + priv->active_rate = 0; + priv->active_rate_basic = 0; + + IWL_DEBUG_RATE("Setting rates for 802.11%c\n", + hw->mode == MODE_IEEE80211A ? + 'a' : ((hw->mode == MODE_IEEE80211B) ? 'b' : 'g')); + + for (i = 0; i < hw->num_rates; i++) { + rate = &(hw->rates[i]); + if ((rate->val < IWL_RATE_COUNT) && + (rate->flags & IEEE80211_RATE_SUPPORTED)) { + IWL_DEBUG_RATE("Adding rate index %d (plcp %d)%s\n", + rate->val, iwl_rates[rate->val].plcp, + (rate->flags & IEEE80211_RATE_BASIC) ? + "*" : ""); + priv->active_rate |= (1 << rate->val); + if (rate->flags & IEEE80211_RATE_BASIC) + priv->active_rate_basic |= (1 << rate->val); + } else + IWL_DEBUG_RATE("Not adding rate %d (plcp %d)\n", + rate->val, iwl_rates[rate->val].plcp); + } + + IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n", + priv->active_rate, priv->active_rate_basic); + + /* + * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK) + * otherwise set it to the default of all CCK rates and 6, 12, 24 for + * OFDM + */ + if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK) + priv->staging_rxon.cck_basic_rates = + ((priv->active_rate_basic & + IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF; + else + priv->staging_rxon.cck_basic_rates = + (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF; + + if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK) + priv->staging_rxon.ofdm_basic_rates = + ((priv->active_rate_basic & + (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >> + IWL_FIRST_OFDM_RATE) & 0xFF; + else + priv->staging_rxon.ofdm_basic_rates = + (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF; +} + +static void iwl_radio_kill_sw(struct iwl_priv *priv, int disable_radio) +{ + unsigned long flags; + + if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status)) + return; + + IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n", + disable_radio ? "OFF" : "ON"); + + if (disable_radio) { + iwl_scan_cancel(priv); + /* FIXME: This is a workaround for AP */ + if (priv->iw_mode != IEEE80211_IF_TYPE_AP) { + spin_lock_irqsave(&priv->lock, flags); + iwl_write32(priv, CSR_UCODE_DRV_GP1_SET, + CSR_UCODE_SW_BIT_RFKILL); + spin_unlock_irqrestore(&priv->lock, flags); + iwl_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0); + set_bit(STATUS_RF_KILL_SW, &priv->status); + } + return; + } + + spin_lock_irqsave(&priv->lock, flags); + iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); + + clear_bit(STATUS_RF_KILL_SW, &priv->status); + spin_unlock_irqrestore(&priv->lock, flags); + + /* wake up ucode */ + msleep(10); + + spin_lock_irqsave(&priv->lock, flags); + iwl_read32(priv, CSR_UCODE_DRV_GP1); + if (!iwl_grab_restricted_access(priv)) + iwl_release_restricted_access(priv); + spin_unlock_irqrestore(&priv->lock, flags); + + if (test_bit(STATUS_RF_KILL_HW, &priv->status)) { + IWL_DEBUG_RF_KILL("Can not turn radio back on - " + "disabled by HW switch\n"); + return; + } + + queue_work(priv->workqueue, &priv->restart); + return; +} + +void iwl_set_decrypted_flag(struct iwl_priv *priv, struct sk_buff *skb, + u32 decrypt_res, struct ieee80211_rx_status *stats) +{ + u16 fc = + le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control); + + if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK) + return; + + if (!(fc & IEEE80211_FCTL_PROTECTED)) + return; + + IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res); + switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) { + case RX_RES_STATUS_SEC_TYPE_TKIP: + if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) == + RX_RES_STATUS_BAD_ICV_MIC) + stats->flag |= RX_FLAG_MMIC_ERROR; + case RX_RES_STATUS_SEC_TYPE_WEP: + case RX_RES_STATUS_SEC_TYPE_CCMP: + if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) == + RX_RES_STATUS_DECRYPT_OK) { + IWL_DEBUG_RX("hw decrypt successfully!!!\n"); + stats->flag |= RX_FLAG_DECRYPTED; + } + break; + + default: + break; + } +} + +void iwl_handle_data_packet_monitor(struct iwl_priv *priv, + struct iwl_rx_mem_buffer *rxb, + void *data, short len, + struct ieee80211_rx_status *stats, + u16 phy_flags) +{ + struct iwl_rt_rx_hdr *iwl_rt; + + /* First cache any information we need before we overwrite + * the information provided in the skb from the hardware */ + s8 signal = stats->ssi; + s8 noise = 0; + int rate = stats->rate; + u64 tsf = stats->mactime; + __le16 phy_flags_hw = cpu_to_le16(phy_flags); + + /* We received data from the HW, so stop the watchdog */ + if (len > IWL_RX_BUF_SIZE - sizeof(*iwl_rt)) { + IWL_DEBUG_DROP("Dropping too large packet in monitor\n"); + return; + } + + /* copy the frame data to write after where the radiotap header goes */ + iwl_rt = (void *)rxb->skb->data; + memmove(iwl_rt->payload, data, len); + + iwl_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION; + iwl_rt->rt_hdr.it_pad = 0; /* always good to zero */ + + /* total header + data */ + iwl_rt->rt_hdr.it_len = cpu_to_le16(sizeof(*iwl_rt)); + + /* Set the size of the skb to the size of the frame */ + skb_put(rxb->skb, sizeof(*iwl_rt) + len); + + /* Big bitfield of all the fields we provide in radiotap */ + iwl_rt->rt_hdr.it_present = + cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) | + (1 << IEEE80211_RADIOTAP_FLAGS) | + (1 << IEEE80211_RADIOTAP_RATE) | + (1 << IEEE80211_RADIOTAP_CHANNEL) | + (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) | + (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) | + (1 << IEEE80211_RADIOTAP_ANTENNA)); + + /* Zero the flags, we'll add to them as we go */ + iwl_rt->rt_flags = 0; + + iwl_rt->rt_tsf = cpu_to_le64(tsf); + + /* Convert to dBm */ + iwl_rt->rt_dbmsignal = signal; + iwl_rt->rt_dbmnoise = noise; + + /* Convert the channel frequency and set the flags */ + iwl_rt->rt_channelMHz = cpu_to_le16(stats->freq); + if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK)) + iwl_rt->rt_chbitmask = + cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ)); + else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK) + iwl_rt->rt_chbitmask = + cpu_to_le16((IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ)); + else /* 802.11g */ + iwl_rt->rt_chbitmask = + cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ)); + + rate = iwl_rate_index_from_plcp(rate); + if (rate == -1) + iwl_rt->rt_rate = 0; + else + iwl_rt->rt_rate = iwl_rates[rate].ieee; + + /* antenna number */ + iwl_rt->rt_antenna = + le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4; + + /* set the preamble flag if we have it */ + if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK) + iwl_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE; + + IWL_DEBUG_RX("Rx packet of %d bytes.\n", rxb->skb->len); + + stats->flag |= RX_FLAG_RADIOTAP; + ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats); + rxb->skb = NULL; +} + + +#define IWL_PACKET_RETRY_TIME HZ + +int is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header) +{ + u16 sc = le16_to_cpu(header->seq_ctrl); + u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4; + u16 frag = sc & IEEE80211_SCTL_FRAG; + u16 *last_seq, *last_frag; + unsigned long *last_time; + + switch (priv->iw_mode) { + case IEEE80211_IF_TYPE_IBSS:{ + struct list_head *p; + struct iwl_ibss_seq *entry = NULL; + u8 *mac = header->addr2; + int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1); + + __list_for_each(p, &priv->ibss_mac_hash[index]) { + entry = + list_entry(p, struct iwl_ibss_seq, list); + if (!compare_ether_addr(entry->mac, mac)) + break; + } + if (p == &priv->ibss_mac_hash[index]) { + entry = kzalloc(sizeof(*entry), GFP_ATOMIC); + if (!entry) { + IWL_ERROR + ("Cannot malloc new mac entry\n"); + return 0; + } + memcpy(entry->mac, mac, ETH_ALEN); + entry->seq_num = seq; + entry->frag_num = frag; + entry->packet_time = jiffies; + list_add(&entry->list, + &priv->ibss_mac_hash[index]); + return 0; + } + last_seq = &entry->seq_num; + last_frag = &entry->frag_num; + last_time = &entry->packet_time; + break; + } + case IEEE80211_IF_TYPE_STA: + last_seq = &priv->last_seq_num; + last_frag = &priv->last_frag_num; + last_time = &priv->last_packet_time; + break; + default: + return 0; + } + if ((*last_seq == seq) && + time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) { + if (*last_frag == frag) + goto drop; + if (*last_frag + 1 != frag) + /* out-of-order fragment */ + goto drop; + } else + *last_seq = seq; + + *last_frag = frag; + *last_time = jiffies; + return 0; + + drop: + return 1; +} + +#ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT + +#include "iwl-spectrum.h" + +#define BEACON_TIME_MASK_LOW 0x00FFFFFF +#define BEACON_TIME_MASK_HIGH 0xFF000000 +#define TIME_UNIT 1024 + +/* + * extended beacon time format + * time in usec will be changed into a 32-bit value in 8:24 format + * the high 1 byte is the beacon counts + * the lower 3 bytes is the time in usec within one beacon interval + */ + +static u32 iwl_usecs_to_beacons(u32 usec, u32 beacon_interval) +{ + u32 quot; + u32 rem; + u32 interval = beacon_interval * 1024; + + if (!interval || !usec) + return 0; + + quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24); + rem = (usec % interval) & BEACON_TIME_MASK_LOW; + + return (quot << 24) + rem; +} + +/* base is usually what we get from ucode with each received frame, + * the same as HW timer counter counting down + */ + +static __le32 iwl_add_beacon_time(u32 base, u32 addon, u32 beacon_interval) +{ + u32 base_low = base & BEACON_TIME_MASK_LOW; + u32 addon_low = addon & BEACON_TIME_MASK_LOW; + u32 interval = beacon_interval * TIME_UNIT; + u32 res = (base & BEACON_TIME_MASK_HIGH) + + (addon & BEACON_TIME_MASK_HIGH); + + if (base_low > addon_low) + res += base_low - addon_low; + else if (base_low < addon_low) { + res += interval + base_low - addon_low; + res += (1 << 24); + } else + res += (1 << 24); + + return cpu_to_le32(res); +} + +static int iwl_get_measurement(struct iwl_priv *priv, + struct ieee80211_measurement_params *params, + u8 type) +{ + struct iwl_spectrum_cmd spectrum; + struct iwl_rx_packet *res; + struct iwl_host_cmd cmd = { + .id = REPLY_SPECTRUM_MEASUREMENT_CMD, + .data = (void *)&spectrum, + .meta.flags = CMD_WANT_SKB, + }; + u32 add_time = le64_to_cpu(params->start_time); + int rc; + int spectrum_resp_status; + int duration = le16_to_cpu(params->duration); + + if (iwl_is_associated(priv)) + add_time = + iwl_usecs_to_beacons( + le64_to_cpu(params->start_time) - priv->last_tsf, + le16_to_cpu(priv->rxon_timing.beacon_interval)); + + memset(&spectrum, 0, sizeof(spectrum)); + + spectrum.channel_count = cpu_to_le16(1); + spectrum.flags = + RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK; + spectrum.filter_flags = MEASUREMENT_FILTER_FLAG; + cmd.len = sizeof(spectrum); + spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len)); + + if (iwl_is_associated(priv)) + spectrum.start_time = + iwl_add_beacon_time(priv->last_beacon_time, + add_time, + le16_to_cpu(priv->rxon_timing.beacon_interval)); + else + spectrum.start_time = 0; + + spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT); + spectrum.channels[0].channel = params->channel; + spectrum.channels[0].type = type; + if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK) + spectrum.flags |= RXON_FLG_BAND_24G_MSK | + RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK; + + rc = iwl_send_cmd_sync(priv, &cmd); + if (rc) + return rc; + + res = (struct iwl_rx_packet *)cmd.meta.u.skb->data; + if (res->hdr.flags & IWL_CMD_FAILED_MSK) { + IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n"); + rc = -EIO; + } + + spectrum_resp_status = le16_to_cpu(res->u.spectrum.status); + switch (spectrum_resp_status) { + case 0: /* Command will be handled */ + if (res->u.spectrum.id != 0xff) { + IWL_DEBUG_INFO + ("Replaced existing measurement: %d\n", + res->u.spectrum.id); + priv->measurement_status &= ~MEASUREMENT_READY; + } + priv->measurement_status |= MEASUREMENT_ACTIVE; + rc = 0; + break; + + case 1: /* Command will not be handled */ + rc = -EAGAIN; + break; + } + + dev_kfree_skb_any(cmd.meta.u.skb); + + return rc; +} +#endif + +static void iwl_txstatus_to_ieee(struct iwl_priv *priv, + struct iwl_tx_info *tx_sta) +{ + + tx_sta->status.ack_signal = 0; + tx_sta->status.excessive_retries = 0; + tx_sta->status.queue_length = 0; + tx_sta->status.queue_number = 0; + + if (in_interrupt()) + ieee80211_tx_status_irqsafe(priv->hw, + tx_sta->skb[0], &(tx_sta->status)); + else + ieee80211_tx_status(priv->hw, + tx_sta->skb[0], &(tx_sta->status)); + + tx_sta->skb[0] = NULL; +} + +/** + * iwl_tx_queue_reclaim - Reclaim Tx queue entries no more used by NIC. + * + * When FW advances 'R' index, all entries between old and + * new 'R' index need to be reclaimed. As result, some free space + * forms. If there is enough free space (> low mark), wake Tx queue. + */ +int iwl_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index) +{ + struct iwl_tx_queue *txq = &priv->txq[txq_id]; + struct iwl_queue *q = &txq->q; + int nfreed = 0; + + if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) { + IWL_ERROR("Read index for DMA queue txq id (%d), index %d, " + "is out of range [0-%d] %d %d.\n", txq_id, + index, q->n_bd, q->first_empty, q->last_used); + return 0; + } + + for (index = iwl_queue_inc_wrap(index, q->n_bd); + q->last_used != index; + q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd)) { + if (txq_id != IWL_CMD_QUEUE_NUM) { + iwl_txstatus_to_ieee(priv, + &(txq->txb[txq->q.last_used])); + iwl_hw_txq_free_tfd(priv, txq); + } else if (nfreed > 1) { + IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index, + q->first_empty, q->last_used); + queue_work(priv->workqueue, &priv->restart); + } + nfreed++; + } + + if (iwl_queue_space(q) > q->low_mark && (txq_id >= 0) && + (txq_id != IWL_CMD_QUEUE_NUM) && + priv->mac80211_registered) + ieee80211_wake_queue(priv->hw, txq_id); + + + return nfreed; +} + +static int iwl_is_tx_success(u32 status) +{ + return (status & 0xFF) == 0x1; +} + +/****************************************************************************** + * + * Generic RX handler implementations + * + ******************************************************************************/ +static void iwl_rx_reply_tx(struct iwl_priv *priv, + struct iwl_rx_mem_buffer *rxb) +{ + struct iwl_rx_packet *pkt = (void *)rxb->skb->data; + u16 sequence = le16_to_cpu(pkt->hdr.sequence); + int txq_id = SEQ_TO_QUEUE(sequence); + int index = SEQ_TO_INDEX(sequence); + struct iwl_tx_queue *txq = &priv->txq[txq_id]; + struct ieee80211_tx_status *tx_status; + struct iwl_tx_resp *tx_resp = (void *)&pkt->u.raw[0]; + u32 status = le32_to_cpu(tx_resp->status); + + if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) { + IWL_ERROR("Read index for DMA queue txq_id (%d) index %d " + "is out of range [0-%d] %d %d\n", txq_id, + index, txq->q.n_bd, txq->q.first_empty, + txq->q.last_used); + return; + } + + tx_status = &(txq->txb[txq->q.last_used].status); + + tx_status->retry_count = tx_resp->failure_frame; + tx_status->queue_number = status; + tx_status->queue_length = tx_resp->bt_kill_count; + tx_status->queue_length |= tx_resp->failure_rts; + + tx_status->flags = + iwl_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0; + + tx_status->control.tx_rate = iwl_rate_index_from_plcp(tx_resp->rate); + + IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) plcp rate %d retries %d\n", + txq_id, iwl_get_tx_fail_reason(status), status, + tx_resp->rate, tx_resp->failure_frame); + + IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index); + if (index != -1) + iwl_tx_queue_reclaim(priv, txq_id, index); + + if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK)) + IWL_ERROR("TODO: Implement Tx ABORT REQUIRED!!!\n"); +} + + +static void iwl_rx_reply_alive(struct iwl_priv *priv, + struct iwl_rx_mem_buffer *rxb) +{ + struct iwl_rx_packet *pkt = (void *)rxb->skb->data; + struct iwl_alive_resp *palive; + struct delayed_work *pwork; + + palive = &pkt->u.alive_frame; + + IWL_DEBUG_INFO("Alive ucode status 0x%08X revision " + "0x%01X 0x%01X\n", + palive->is_valid, palive->ver_type, + palive->ver_subtype); + + if (palive->ver_subtype == INITIALIZE_SUBTYPE) { + IWL_DEBUG_INFO("Initialization Alive received.\n"); + memcpy(&priv->card_alive_init, + &pkt->u.alive_frame, + sizeof(struct iwl_init_alive_resp)); + pwork = &priv->init_alive_start; + } else { + IWL_DEBUG_INFO("Runtime Alive received.\n"); + memcpy(&priv->card_alive, &pkt->u.alive_frame, + sizeof(struct iwl_alive_resp)); + pwork = &priv->alive_start; + iwl_disable_events(priv); + } + + /* We delay the ALIVE response by 5ms to + * give the HW RF Kill time to activate... */ + if (palive->is_valid == UCODE_VALID_OK) + queue_delayed_work(priv->workqueue, pwork, + msecs_to_jiffies(5)); + else + IWL_WARNING("uCode did not respond OK.\n"); +} + +static void iwl_rx_reply_add_sta(struct iwl_priv *priv, + struct iwl_rx_mem_buffer *rxb) +{ + struct iwl_rx_packet *pkt = (void *)rxb->skb->data; + + IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status); + return; +} + +static void iwl_rx_reply_error(struct iwl_priv *priv, + struct iwl_rx_mem_buffer *rxb) +{ + struct iwl_rx_packet *pkt = (void *)rxb->skb->data; + + IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) " + "seq 0x%04X ser 0x%08X\n", + le32_to_cpu(pkt->u.err_resp.error_type), + get_cmd_string(pkt->u.err_resp.cmd_id), + pkt->u.err_resp.cmd_id, + le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num), + le32_to_cpu(pkt->u.err_resp.error_info)); +} + +#define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x + +static void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) +{ + struct iwl_rx_packet *pkt = (void *)rxb->skb->data; + struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon; + struct iwl_csa_notification *csa = &(pkt->u.csa_notif); + IWL_DEBUG_11H("CSA notif: channel %d, status %d\n", + le16_to_cpu(csa->channel), le32_to_cpu(csa->status)); + rxon->channel = csa->channel; + priv->staging_rxon.channel = csa->channel; +} + +static void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv, + struct iwl_rx_mem_buffer *rxb) +{ +#ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT + struct iwl_rx_packet *pkt = (void *)rxb->skb->data; + struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif); + + if (!report->state) { + IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO, + "Spectrum Measure Notification: Start\n"); + return; + } + + memcpy(&priv->measure_report, report, sizeof(*report)); + priv->measurement_status |= MEASUREMENT_READY; +#endif +} + +static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv, + struct iwl_rx_mem_buffer *rxb) +{ +#ifdef CONFIG_IWLWIFI_DEBUG + struct iwl_rx_packet *pkt = (void *)rxb->skb->data; + struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif); + IWL_DEBUG_RX("sleep mode: %d, src: %d\n", + sleep->pm_sleep_mode, sleep->pm_wakeup_src); +#endif +} + +static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv, + struct iwl_rx_mem_buffer *rxb) +{ + struct iwl_rx_packet *pkt = (void *)rxb->skb->data; + IWL_DEBUG_RADIO("Dumping %d bytes of unhandled " + "notification for %s:\n", + le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd)); + iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len)); +} + +static void iwl_bg_beacon_update(struct work_struct *work) +{ + struct iwl_priv *priv = + container_of(work, struct iwl_priv, beacon_update); + struct sk_buff *beacon; + + /* Pull updated AP beacon from mac80211. will fail if not in AP mode */ + beacon = ieee80211_beacon_get(priv->hw, priv->interface_id, NULL); + + if (!beacon) { + IWL_ERROR("update beacon failed\n"); + return; + } + + mutex_lock(&priv->mutex); + /* new beacon skb is allocated every time; dispose previous.*/ + if (priv->ibss_beacon) + dev_kfree_skb(priv->ibss_beacon); + + priv->ibss_beacon = beacon; + mutex_unlock(&priv->mutex); + + iwl_send_beacon_cmd(priv); +} + +static void iwl_rx_beacon_notif(struct iwl_priv *priv, + struct iwl_rx_mem_buffer *rxb) +{ +#ifdef CONFIG_IWLWIFI_DEBUG + struct iwl_rx_packet *pkt = (void *)rxb->skb->data; + struct iwl_beacon_notif *beacon = &(pkt->u.beacon_status); + u8 rate = beacon->beacon_notify_hdr.rate; + + IWL_DEBUG_RX("beacon status %x retries %d iss %d " + "tsf %d %d rate %d\n", + le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK, + beacon->beacon_notify_hdr.failure_frame, + le32_to_cpu(beacon->ibss_mgr_status), + le32_to_cpu(beacon->high_tsf), + le32_to_cpu(beacon->low_tsf), rate); +#endif + + if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) && + (!test_bit(STATUS_EXIT_PENDING, &priv->status))) + queue_work(priv->workqueue, &priv->beacon_update); +} + +/* Service response to REPLY_SCAN_CMD (0x80) */ +static void iwl_rx_reply_scan(struct iwl_priv *priv, + struct iwl_rx_mem_buffer *rxb) +{ +#ifdef CONFIG_IWLWIFI_DEBUG + struct iwl_rx_packet *pkt = (void *)rxb->skb->data; + struct iwl_scanreq_notification *notif = + (struct iwl_scanreq_notification *)pkt->u.raw; + + IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status); +#endif +} + +/* Service SCAN_START_NOTIFICATION (0x82) */ +static void iwl_rx_scan_start_notif(struct iwl_priv *priv, + struct iwl_rx_mem_buffer *rxb) +{ + struct iwl_rx_packet *pkt = (void *)rxb->skb->data; + struct iwl_scanstart_notification *notif = + (struct iwl_scanstart_notification *)pkt->u.raw; + priv->scan_start_tsf = le32_to_cpu(notif->tsf_low); + IWL_DEBUG_SCAN("Scan start: " + "%d [802.11%s] " + "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n", + notif->channel, + notif->band ? "bg" : "a", + notif->tsf_high, + notif->tsf_low, notif->status, notif->beacon_timer); +} + +/* Service SCAN_RESULTS_NOTIFICATION (0x83) */ +static void iwl_rx_scan_results_notif(struct iwl_priv *priv, + struct iwl_rx_mem_buffer *rxb) +{ + struct iwl_rx_packet *pkt = (void *)rxb->skb->data; + struct iwl_scanresults_notification *notif = + (struct iwl_scanresults_notification *)pkt->u.raw; + + IWL_DEBUG_SCAN("Scan ch.res: " + "%d [802.11%s] " + "(TSF: 0x%08X:%08X) - %d " + "elapsed=%lu usec (%dms since last)\n", + notif->channel, + notif->band ? "bg" : "a", + le32_to_cpu(notif->tsf_high), + le32_to_cpu(notif->tsf_low), + le32_to_cpu(notif->statistics[0]), + le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf, + jiffies_to_msecs(elapsed_jiffies + (priv->last_scan_jiffies, jiffies))); + + priv->last_scan_jiffies = jiffies; +} + +/* Service SCAN_COMPLETE_NOTIFICATION (0x84) */ +static void iwl_rx_scan_complete_notif(struct iwl_priv *priv, + struct iwl_rx_mem_buffer *rxb) +{ + struct iwl_rx_packet *pkt = (void *)rxb->skb->data; + struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw; + + IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n", + scan_notif->scanned_channels, + scan_notif->tsf_low, + scan_notif->tsf_high, scan_notif->status); + + /* The HW is no longer scanning */ + clear_bit(STATUS_SCAN_HW, &priv->status); + + /* The scan completion notification came in, so kill that timer... */ + cancel_delayed_work(&priv->scan_check); + + IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n", + (priv->scan_bands == 2) ? "2.4" : "5.2", + jiffies_to_msecs(elapsed_jiffies + (priv->scan_pass_start, jiffies))); + + /* Remove this scanned band from the list + * of pending bands to scan */ + priv->scan_bands--; + + /* If a request to abort was given, or the scan did not succeed + * then we reset the scan state machine and terminate, + * re-queuing another scan if one has been requested */ + if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) { + IWL_DEBUG_INFO("Aborted scan completed.\n"); + clear_bit(STATUS_SCAN_ABORTING, &priv->status); + } else { + /* If there are more bands on this scan pass reschedule */ + if (priv->scan_bands > 0) + goto reschedule; + } + + priv->last_scan_jiffies = jiffies; + IWL_DEBUG_INFO("Setting scan to off\n"); + + clear_bit(STATUS_SCANNING, &priv->status); + + IWL_DEBUG_INFO("Scan took %dms\n", + jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies))); + + queue_work(priv->workqueue, &priv->scan_completed); + + return; + +reschedule: + priv->scan_pass_start = jiffies; + queue_work(priv->workqueue, &priv->request_scan); +} + +/* Handle notification from uCode that card's power state is changing + * due to software, hardware, or critical temperature RFKILL */ +static void iwl_rx_card_state_notif(struct iwl_priv *priv, + struct iwl_rx_mem_buffer *rxb) +{ + struct iwl_rx_packet *pkt = (void *)rxb->skb->data; + u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags); + unsigned long status = priv->status; + + IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n", + (flags & HW_CARD_DISABLED) ? "Kill" : "On", + (flags & SW_CARD_DISABLED) ? "Kill" : "On"); + + iwl_write32(priv, CSR_UCODE_DRV_GP1_SET, + CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); + + if (flags & HW_CARD_DISABLED) + set_bit(STATUS_RF_KILL_HW, &priv->status); + else + clear_bit(STATUS_RF_KILL_HW, &priv->status); + + + if (flags & SW_CARD_DISABLED) + set_bit(STATUS_RF_KILL_SW, &priv->status); + else + clear_bit(STATUS_RF_KILL_SW, &priv->status); + + iwl_scan_cancel(priv); + + if ((test_bit(STATUS_RF_KILL_HW, &status) != + test_bit(STATUS_RF_KILL_HW, &priv->status)) || + (test_bit(STATUS_RF_KILL_SW, &status) != + test_bit(STATUS_RF_KILL_SW, &priv->status))) + queue_work(priv->workqueue, &priv->rf_kill); + else + wake_up_interruptible(&priv->wait_command_queue); +} + +/** + * iwl_setup_rx_handlers - Initialize Rx handler callbacks + * + * Setup the RX handlers for each of the reply types sent from the uCode + * to the host. + * + * This function chains into the hardware specific files for them to setup + * any hardware specific handlers as well. + */ +static void iwl_setup_rx_handlers(struct iwl_priv *priv) +{ + priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive; + priv->rx_handlers[REPLY_ADD_STA] = iwl_rx_reply_add_sta; + priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error; + priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa; + priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] = + iwl_rx_spectrum_measure_notif; + priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif; + priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] = + iwl_rx_pm_debug_statistics_notif; + priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif; + + /* NOTE: iwl_rx_statistics is different based on whether + * the build is for the 3945 or the 4965. See the + * corresponding implementation in iwl-XXXX.c + * + * The same handler is used for both the REPLY to a + * discrete statistics request from the host as well as + * for the periodic statistics notification from the uCode + */ + priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_hw_rx_statistics; + priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_hw_rx_statistics; + + priv->rx_handlers[REPLY_SCAN_CMD] = iwl_rx_reply_scan; + priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl_rx_scan_start_notif; + priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] = + iwl_rx_scan_results_notif; + priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] = + iwl_rx_scan_complete_notif; + priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif; + priv->rx_handlers[REPLY_TX] = iwl_rx_reply_tx; + + /* Setup hardware specific Rx handlers */ + iwl_hw_rx_handler_setup(priv); +} + +/** + * iwl_tx_cmd_complete - Pull unused buffers off the queue and reclaim them + * @rxb: Rx buffer to reclaim + * + * If an Rx buffer has an async callback associated with it the callback + * will be executed. The attached skb (if present) will only be freed + * if the callback returns 1 + */ +static void iwl_tx_cmd_complete(struct iwl_priv *priv, + struct iwl_rx_mem_buffer *rxb) +{ + struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; + u16 sequence = le16_to_cpu(pkt->hdr.sequence); + int txq_id = SEQ_TO_QUEUE(sequence); + int index = SEQ_TO_INDEX(sequence); + int huge = sequence & SEQ_HUGE_FRAME; + int cmd_index; + struct iwl_cmd *cmd; + + /* If a Tx command is being handled and it isn't in the actual + * command queue then there a command routing bug has been introduced + * in the queue management code. */ + if (txq_id != IWL_CMD_QUEUE_NUM) + IWL_ERROR("Error wrong command queue %d command id 0x%X\n", + txq_id, pkt->hdr.cmd); + BUG_ON(txq_id != IWL_CMD_QUEUE_NUM); + + cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge); + cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index]; + + /* Input error checking is done when commands are added to queue. */ + if (cmd->meta.flags & CMD_WANT_SKB) { + cmd->meta.source->u.skb = rxb->skb; + rxb->skb = NULL; + } else if (cmd->meta.u.callback && + !cmd->meta.u.callback(priv, cmd, rxb->skb)) + rxb->skb = NULL; + + iwl_tx_queue_reclaim(priv, txq_id, index); + + if (!(cmd->meta.flags & CMD_ASYNC)) { + clear_bit(STATUS_HCMD_ACTIVE, &priv->status); + wake_up_interruptible(&priv->wait_command_queue); + } +} + +/************************** RX-FUNCTIONS ****************************/ +/* + * Rx theory of operation + * + * The host allocates 32 DMA target addresses and passes the host address + * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is + * 0 to 31 + * + * Rx Queue Indexes + * The host/firmware share two index registers for managing the Rx buffers. + * + * The READ index maps to the first position that the firmware may be writing + * to -- the driver can read up to (but not including) this position and get + * good data. + * The READ index is managed by the firmware once the card is enabled. + * + * The WRITE index maps to the last position the driver has read from -- the + * position preceding WRITE is the last slot the firmware can place a packet. + * + * The queue is empty (no good data) if WRITE = READ - 1, and is full if + * WRITE = READ. + * + * During initialization the host sets up the READ queue position to the first + * INDEX position, and WRITE to the last (READ - 1 wrapped) + * + * When the firmware places a packet in a buffer it will advance the READ index + * and fire the RX interrupt. The driver can then query the READ index and + * process as many packets as possible, moving the WRITE index forward as it + * resets the Rx queue buffers with new memory. + * + * The management in the driver is as follows: + * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When + * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled + * to replensish the iwl->rxq->rx_free. + * + In iwl_rx_replenish (scheduled) if 'processed' != 'read' then the + * iwl->rxq is replenished and the READ INDEX is updated (updating the + * 'processed' and 'read' driver indexes as well) + * + A received packet is processed and handed to the kernel network stack, + * detached from the iwl->rxq. The driver 'processed' index is updated. + * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free + * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ + * INDEX is not incremented and iwl->status(RX_STALLED) is set. If there + * were enough free buffers and RX_STALLED is set it is cleared. + * + * + * Driver sequence: + * + * iwl_rx_queue_alloc() Allocates rx_free + * iwl_rx_replenish() Replenishes rx_free list from rx_used, and calls + * iwl_rx_queue_restock + * iwl_rx_queue_restock() Moves available buffers from rx_free into Rx + * queue, updates firmware pointers, and updates + * the WRITE index. If insufficient rx_free buffers + * are available, schedules iwl_rx_replenish + * + * -- enable interrupts -- + * ISR - iwl_rx() Detach iwl_rx_mem_buffers from pool up to the + * READ INDEX, detaching the SKB from the pool. + * Moves the packet buffer from queue to rx_used. + * Calls iwl_rx_queue_restock to refill any empty + * slots. + * ... + * + */ + +/** + * iwl_rx_queue_space - Return number of free slots available in queue. + */ +static int iwl_rx_queue_space(const struct iwl_rx_queue *q) +{ + int s = q->read - q->write; + if (s <= 0) + s += RX_QUEUE_SIZE; + /* keep some buffer to not confuse full and empty queue */ + s -= 2; + if (s < 0) + s = 0; + return s; +} + +/** + * iwl_rx_queue_update_write_ptr - Update the write pointer for the RX queue + * + * NOTE: This function has 3945 and 4965 specific code sections + * but is declared in base due to the majority of the + * implementation being the same (only a numeric constant is + * different) + * + */ +int iwl_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl_rx_queue *q) +{ + u32 reg = 0; + int rc = 0; + unsigned long flags; + + spin_lock_irqsave(&q->lock, flags); + + if (q->need_update == 0) + goto exit_unlock; + + if (test_bit(STATUS_POWER_PMI, &priv->status)) { + reg = iwl_read32(priv, CSR_UCODE_DRV_GP1); + + if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) { + iwl_set_bit(priv, CSR_GP_CNTRL, + CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); + goto exit_unlock; + } + + rc = iwl_grab_restricted_access(priv); + if (rc) + goto exit_unlock; + + iwl_write_restricted(priv, FH_RSCSR_CHNL0_WPTR, + q->write & ~0x7); + iwl_release_restricted_access(priv); + } else + iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7); + + + q->need_update = 0; + + exit_unlock: + spin_unlock_irqrestore(&q->lock, flags); + return rc; +} + +/** + * iwl_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer pointer. + * + * NOTE: This function has 3945 and 4965 specific code paths in it. + */ +static inline __le32 iwl_dma_addr2rbd_ptr(struct iwl_priv *priv, + dma_addr_t dma_addr) +{ + return cpu_to_le32((u32)dma_addr); +} + +/** + * iwl_rx_queue_restock - refill RX queue from pre-allocated pool + * + * If there are slots in the RX queue that need to be restocked, + * and we have free pre-allocated buffers, fill the ranks as much + * as we can pulling from rx_free. + * + * This moves the 'write' index forward to catch up with 'processed', and + * also updates the memory address in the firmware to reference the new + * target buffer. + */ +int iwl_rx_queue_restock(struct iwl_priv *priv) +{ + struct iwl_rx_queue *rxq = &priv->rxq; + struct list_head *element; + struct iwl_rx_mem_buffer *rxb; + unsigned long flags; + int write, rc; + + spin_lock_irqsave(&rxq->lock, flags); + write = rxq->write & ~0x7; + while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) { + element = rxq->rx_free.next; + rxb = list_entry(element, struct iwl_rx_mem_buffer, list); + list_del(element); + rxq->bd[rxq->write] = iwl_dma_addr2rbd_ptr(priv, rxb->dma_addr); + rxq->queue[rxq->write] = rxb; + rxq->write = (rxq->write + 1) & RX_QUEUE_MASK; + rxq->free_count--; + } + spin_unlock_irqrestore(&rxq->lock, flags); + /* If the pre-allocated buffer pool is dropping low, schedule to + * refill it */ + if (rxq->free_count <= RX_LOW_WATERMARK) + queue_work(priv->workqueue, &priv->rx_replenish); + + + /* If we've added more space for the firmware to place data, tell it */ + if ((write != (rxq->write & ~0x7)) + || (abs(rxq->write - rxq->read) > 7)) { + spin_lock_irqsave(&rxq->lock, flags); + rxq->need_update = 1; + spin_unlock_irqrestore(&rxq->lock, flags); + rc = iwl_rx_queue_update_write_ptr(priv, rxq); + if (rc) + return rc; + } + + return 0; +} + +/** + * iwl_rx_replensih - Move all used packet from rx_used to rx_free + * + * When moving to rx_free an SKB is allocated for the slot. + * + * Also restock the Rx queue via iwl_rx_queue_restock. + * This is called as a scheduled work item (except for during intialization) + */ +void iwl_rx_replenish(void *data) +{ + struct iwl_priv *priv = data; + struct iwl_rx_queue *rxq = &priv->rxq; + struct list_head *element; + struct iwl_rx_mem_buffer *rxb; + unsigned long flags; + spin_lock_irqsave(&rxq->lock, flags); + while (!list_empty(&rxq->rx_used)) { + element = rxq->rx_used.next; + rxb = list_entry(element, struct iwl_rx_mem_buffer, list); + rxb->skb = + alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC); + if (!rxb->skb) { + if (net_ratelimit()) + printk(KERN_CRIT DRV_NAME + ": Can not allocate SKB buffers\n"); + /* We don't reschedule replenish work here -- we will + * call the restock method and if it still needs + * more buffers it will schedule replenish */ + break; + } + priv->alloc_rxb_skb++; + list_del(element); + rxb->dma_addr = + pci_map_single(priv->pci_dev, rxb->skb->data, + IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE); + list_add_tail(&rxb->list, &rxq->rx_free); + rxq->free_count++; + } + spin_unlock_irqrestore(&rxq->lock, flags); + + spin_lock_irqsave(&priv->lock, flags); + iwl_rx_queue_restock(priv); + spin_unlock_irqrestore(&priv->lock, flags); +} + +/* Assumes that the skb field of the buffers in 'pool' is kept accurate. + * If an SKB has been detached, the POOL needs to have it's SKB set to NULL + * This free routine walks the list of POOL entries and if SKB is set to + * non NULL it is unmapped and freed + */ +void iwl_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq) +{ + int i; + for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) { + if (rxq->pool[i].skb != NULL) { + pci_unmap_single(priv->pci_dev, + rxq->pool[i].dma_addr, + IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE); + dev_kfree_skb(rxq->pool[i].skb); + } + } + + pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd, + rxq->dma_addr); + rxq->bd = NULL; +} + +int iwl_rx_queue_alloc(struct iwl_priv *priv) +{ + struct iwl_rx_queue *rxq = &priv->rxq; + struct pci_dev *dev = priv->pci_dev; + int i; + + spin_lock_init(&rxq->lock); + INIT_LIST_HEAD(&rxq->rx_free); + INIT_LIST_HEAD(&rxq->rx_used); + rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr); + if (!rxq->bd) + return -ENOMEM; + /* Fill the rx_used queue with _all_ of the Rx buffers */ + for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) + list_add_tail(&rxq->pool[i].list, &rxq->rx_used); + /* Set us so that we have processed and used all buffers, but have + * not restocked the Rx queue with fresh buffers */ + rxq->read = rxq->write = 0; + rxq->free_count = 0; + rxq->need_update = 0; + return 0; +} + +void iwl_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq) +{ + unsigned long flags; + int i; + spin_lock_irqsave(&rxq->lock, flags); + INIT_LIST_HEAD(&rxq->rx_free); + INIT_LIST_HEAD(&rxq->rx_used); + /* Fill the rx_used queue with _all_ of the Rx buffers */ + for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) { + /* In the reset function, these buffers may have been allocated + * to an SKB, so we need to unmap and free potential storage */ + if (rxq->pool[i].skb != NULL) { + pci_unmap_single(priv->pci_dev, + rxq->pool[i].dma_addr, + IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE); + priv->alloc_rxb_skb--; + dev_kfree_skb(rxq->pool[i].skb); + rxq->pool[i].skb = NULL; + } + list_add_tail(&rxq->pool[i].list, &rxq->rx_used); + } + + /* Set us so that we have processed and used all buffers, but have + * not restocked the Rx queue with fresh buffers */ + rxq->read = rxq->write = 0; + rxq->free_count = 0; + spin_unlock_irqrestore(&rxq->lock, flags); +} + +/* Convert linear signal-to-noise ratio into dB */ +static u8 ratio2dB[100] = { +/* 0 1 2 3 4 5 6 7 8 9 */ + 0, 0, 6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */ + 20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */ + 26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */ + 29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */ + 32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */ + 34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */ + 36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */ + 37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */ + 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */ + 39, 39, 39, 39, 39, 40, 40, 40, 40, 40 /* 90 - 99 */ +}; + +/* Calculates a relative dB value from a ratio of linear + * (i.e. not dB) signal levels. + * Conversion assumes that levels are voltages (20*log), not powers (10*log). */ +int iwl_calc_db_from_ratio(int sig_ratio) +{ + /* Anything above 1000:1 just report as 60 dB */ + if (sig_ratio > 1000) + return 60; + + /* Above 100:1, divide by 10 and use table, + * add 20 dB to make up for divide by 10 */ + if (sig_ratio > 100) + return (20 + (int)ratio2dB[sig_ratio/10]); + + /* We shouldn't see this */ + if (sig_ratio < 1) + return 0; + + /* Use table for ratios 1:1 - 99:1 */ + return (int)ratio2dB[sig_ratio]; +} + +#define PERFECT_RSSI (-20) /* dBm */ +#define WORST_RSSI (-95) /* dBm */ +#define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI) + +/* Calculate an indication of rx signal quality (a percentage, not dBm!). + * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info + * about formulas used below. */ +int iwl_calc_sig_qual(int rssi_dbm, int noise_dbm) +{ + int sig_qual; + int degradation = PERFECT_RSSI - rssi_dbm; + + /* If we get a noise measurement, use signal-to-noise ratio (SNR) + * as indicator; formula is (signal dbm - noise dbm). + * SNR at or above 40 is a great signal (100%). + * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator. + * Weakest usable signal is usually 10 - 15 dB SNR. */ + if (noise_dbm) { + if (rssi_dbm - noise_dbm >= 40) + return 100; + else if (rssi_dbm < noise_dbm) + return 0; + sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2; + + /* Else use just the signal level. + * This formula is a least squares fit of data points collected and + * compared with a reference system that had a percentage (%) display + * for signal quality. */ + } else + sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation * + (15 * RSSI_RANGE + 62 * degradation)) / + (RSSI_RANGE * RSSI_RANGE); + + if (sig_qual > 100) + sig_qual = 100; + else if (sig_qual < 1) + sig_qual = 0; + + return sig_qual; +} + +/** + * iwl_rx_handle - Main entry function for receiving responses from the uCode + * + * Uses the priv->rx_handlers callback function array to invoke + * the appropriate handlers, including command responses, + * frame-received notifications, and other notifications. + */ +static void iwl_rx_handle(struct iwl_priv *priv) +{ + struct iwl_rx_mem_buffer *rxb; + struct iwl_rx_packet *pkt; + struct iwl_rx_queue *rxq = &priv->rxq; + u32 r, i; + int reclaim; + unsigned long flags; + + r = iwl_hw_get_rx_read(priv); + i = rxq->read; + + /* Rx interrupt, but nothing sent from uCode */ + if (i == r) + IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i); + + while (i != r) { + rxb = rxq->queue[i]; + + /* If an RXB doesn't have a queue slot associated with it + * then a bug has been introduced in the queue refilling + * routines -- catch it here */ + BUG_ON(rxb == NULL); + + rxq->queue[i] = NULL; + + pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr, + IWL_RX_BUF_SIZE, + PCI_DMA_FROMDEVICE); + pkt = (struct iwl_rx_packet *)rxb->skb->data; + + /* Reclaim a command buffer only if this packet is a response + * to a (driver-originated) command. + * If the packet (e.g. Rx frame) originated from uCode, + * there is no command buffer to reclaim. + * Ucode should set SEQ_RX_FRAME bit if ucode-originated, + * but apparently a few don't get set; catch them here. */ + reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) && + (pkt->hdr.cmd != STATISTICS_NOTIFICATION) && + (pkt->hdr.cmd != REPLY_TX); + + /* Based on type of command response or notification, + * handle those that need handling via function in + * rx_handlers table. See iwl_setup_rx_handlers() */ + if (priv->rx_handlers[pkt->hdr.cmd]) { + IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR, + "r = %d, i = %d, %s, 0x%02x\n", r, i, + get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd); + priv->rx_handlers[pkt->hdr.cmd] (priv, rxb); + } else { + /* No handling needed */ + IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR, + "r %d i %d No handler needed for %s, 0x%02x\n", + r, i, get_cmd_string(pkt->hdr.cmd), + pkt->hdr.cmd); + } + + if (reclaim) { + /* Invoke any callbacks, transfer the skb to caller, + * and fire off the (possibly) blocking iwl_send_cmd() + * as we reclaim the driver command queue */ + if (rxb && rxb->skb) + iwl_tx_cmd_complete(priv, rxb); + else + IWL_WARNING("Claim null rxb?\n"); + } + + /* For now we just don't re-use anything. We can tweak this + * later to try and re-use notification packets and SKBs that + * fail to Rx correctly */ + if (rxb->skb != NULL) { + priv->alloc_rxb_skb--; + dev_kfree_skb_any(rxb->skb); + rxb->skb = NULL; + } + + pci_unmap_single(priv->pci_dev, rxb->dma_addr, + IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE); + spin_lock_irqsave(&rxq->lock, flags); + list_add_tail(&rxb->list, &priv->rxq.rx_used); + spin_unlock_irqrestore(&rxq->lock, flags); + i = (i + 1) & RX_QUEUE_MASK; + } + + /* Backtrack one entry */ + priv->rxq.read = i; + iwl_rx_queue_restock(priv); +} + +int iwl_tx_queue_update_write_ptr(struct iwl_priv *priv, + struct iwl_tx_queue *txq) +{ + u32 reg = 0; + int rc = 0; + int txq_id = txq->q.id; + + if (txq->need_update == 0) + return rc; + + /* if we're trying to save power */ + if (test_bit(STATUS_POWER_PMI, &priv->status)) { + /* wake up nic if it's powered down ... + * uCode will wake up, and interrupt us again, so next + * time we'll skip this part. */ + reg = iwl_read32(priv, CSR_UCODE_DRV_GP1); + + if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) { + IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg); + iwl_set_bit(priv, CSR_GP_CNTRL, + CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); + return rc; + } + + /* restore this queue's parameters in nic hardware. */ + rc = iwl_grab_restricted_access(priv); + if (rc) + return rc; + iwl_write_restricted(priv, HBUS_TARG_WRPTR, + txq->q.first_empty | (txq_id << 8)); + iwl_release_restricted_access(priv); + + /* else not in power-save mode, uCode will never sleep when we're + * trying to tx (during RFKILL, we're not trying to tx). */ + } else + iwl_write32(priv, HBUS_TARG_WRPTR, + txq->q.first_empty | (txq_id << 8)); + + txq->need_update = 0; + + return rc; +} + +#ifdef CONFIG_IWLWIFI_DEBUG +static void iwl_print_rx_config_cmd(struct iwl_rxon_cmd *rxon) +{ + DECLARE_MAC_BUF(mac); + + IWL_DEBUG_RADIO("RX CONFIG:\n"); + iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon)); + IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel)); + IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags)); + IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n", + le32_to_cpu(rxon->filter_flags)); + IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type); + IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n", + rxon->ofdm_basic_rates); + IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates); + IWL_DEBUG_RADIO("u8[6] node_addr: %s\n", + print_mac(mac, rxon->node_addr)); + IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n", + print_mac(mac, rxon->bssid_addr)); + IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id)); +} +#endif + +static void iwl_enable_interrupts(struct iwl_priv *priv) +{ + IWL_DEBUG_ISR("Enabling interrupts\n"); + set_bit(STATUS_INT_ENABLED, &priv->status); + iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK); +} + +static inline void iwl_disable_interrupts(struct iwl_priv *priv) +{ + clear_bit(STATUS_INT_ENABLED, &priv->status); + + /* disable interrupts from uCode/NIC to host */ + iwl_write32(priv, CSR_INT_MASK, 0x00000000); + + /* acknowledge/clear/reset any interrupts still pending + * from uCode or flow handler (Rx/Tx DMA) */ + iwl_write32(priv, CSR_INT, 0xffffffff); + iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff); + IWL_DEBUG_ISR("Disabled interrupts\n"); +} + +static const char *desc_lookup(int i) +{ + switch (i) { + case 1: + return "FAIL"; + case 2: + return "BAD_PARAM"; + case 3: + return "BAD_CHECKSUM"; + case 4: + return "NMI_INTERRUPT"; + case 5: + return "SYSASSERT"; + case 6: + return "FATAL_ERROR"; + } + + return "UNKNOWN"; +} + +#define ERROR_START_OFFSET (1 * sizeof(u32)) +#define ERROR_ELEM_SIZE (7 * sizeof(u32)) + +static void iwl_dump_nic_error_log(struct iwl_priv *priv) +{ + u32 i; + u32 desc, time, count, base, data1; + u32 blink1, blink2, ilink1, ilink2; + int rc; + + base = le32_to_cpu(priv->card_alive.error_event_table_ptr); + + if (!iwl_hw_valid_rtc_data_addr(base)) { + IWL_ERROR("Not valid error log pointer 0x%08X\n", base); + return; + } + + rc = iwl_grab_restricted_access(priv); + if (rc) { + IWL_WARNING("Can not read from adapter at this time.\n"); + return; + } + + count = iwl_read_restricted_mem(priv, base); + + if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) { + IWL_ERROR("Start IWL Error Log Dump:\n"); + IWL_ERROR("Status: 0x%08lX, Config: %08X count: %d\n", + priv->status, priv->config, count); + } + + IWL_ERROR("Desc Time asrtPC blink2 " + "ilink1 nmiPC Line\n"); + for (i = ERROR_START_OFFSET; + i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET; + i += ERROR_ELEM_SIZE) { + desc = iwl_read_restricted_mem(priv, base + i); + time = + iwl_read_restricted_mem(priv, base + i + 1 * sizeof(u32)); + blink1 = + iwl_read_restricted_mem(priv, base + i + 2 * sizeof(u32)); + blink2 = + iwl_read_restricted_mem(priv, base + i + 3 * sizeof(u32)); + ilink1 = + iwl_read_restricted_mem(priv, base + i + 4 * sizeof(u32)); + ilink2 = + iwl_read_restricted_mem(priv, base + i + 5 * sizeof(u32)); + data1 = + iwl_read_restricted_mem(priv, base + i + 6 * sizeof(u32)); + + IWL_ERROR + ("%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n", + desc_lookup(desc), desc, time, blink1, blink2, + ilink1, ilink2, data1); + } + + iwl_release_restricted_access(priv); + +} + +#define EVENT_START_OFFSET (4 * sizeof(u32)) + +/** + * iwl_print_event_log - Dump error event log to syslog + * + * NOTE: Must be called with iwl_grab_restricted_access() already obtained! + */ +static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx, + u32 num_events, u32 mode) +{ + u32 i; + u32 base; /* SRAM byte address of event log header */ + u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */ + u32 ptr; /* SRAM byte address of log data */ + u32 ev, time, data; /* event log data */ + + if (num_events == 0) + return; + + base = le32_to_cpu(priv->card_alive.log_event_table_ptr); + + if (mode == 0) + event_size = 2 * sizeof(u32); + else + event_size = 3 * sizeof(u32); + + ptr = base + EVENT_START_OFFSET + (start_idx * event_size); + + /* "time" is actually "data" for mode 0 (no timestamp). + * place event id # at far right for easier visual parsing. */ + for (i = 0; i < num_events; i++) { + ev = iwl_read_restricted_mem(priv, ptr); + ptr += sizeof(u32); + time = iwl_read_restricted_mem(priv, ptr); + ptr += sizeof(u32); + if (mode == 0) + IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */ + else { + data = iwl_read_restricted_mem(priv, ptr); + ptr += sizeof(u32); + IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev); + } + } +} + +static void iwl_dump_nic_event_log(struct iwl_priv *priv) +{ + int rc; + u32 base; /* SRAM byte address of event log header */ + u32 capacity; /* event log capacity in # entries */ + u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */ + u32 num_wraps; /* # times uCode wrapped to top of log */ + u32 next_entry; /* index of next entry to be written by uCode */ + u32 size; /* # entries that we'll print */ + + base = le32_to_cpu(priv->card_alive.log_event_table_ptr); + if (!iwl_hw_valid_rtc_data_addr(base)) { + IWL_ERROR("Invalid event log pointer 0x%08X\n", base); + return; + } + + rc = iwl_grab_restricted_access(priv); + if (rc) { + IWL_WARNING("Can not read from adapter at this time.\n"); + return; + } + + /* event log header */ + capacity = iwl_read_restricted_mem(priv, base); + mode = iwl_read_restricted_mem(priv, base + (1 * sizeof(u32))); + num_wraps = iwl_read_restricted_mem(priv, base + (2 * sizeof(u32))); + next_entry = iwl_read_restricted_mem(priv, base + (3 * sizeof(u32))); + + size = num_wraps ? capacity : next_entry; + + /* bail out if nothing in log */ + if (size == 0) { + IWL_ERROR("Start IWL Event Log Dump: nothing in log\n"); + iwl_release_restricted_access(priv); + return; + } + + IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n", + size, num_wraps); + + /* if uCode has wrapped back to top of log, start at the oldest entry, + * i.e the next one that uCode would fill. */ + if (num_wraps) + iwl_print_event_log(priv, next_entry, + capacity - next_entry, mode); + + /* (then/else) start at top of log */ + iwl_print_event_log(priv, 0, next_entry, mode); + + iwl_release_restricted_access(priv); +} + +/** + * iwl_irq_handle_error - called for HW or SW error interrupt from card + */ +static void iwl_irq_handle_error(struct iwl_priv *priv) +{ + /* Set the FW error flag -- cleared on iwl_down */ + set_bit(STATUS_FW_ERROR, &priv->status); + + /* Cancel currently queued command. */ + clear_bit(STATUS_HCMD_ACTIVE, &priv->status); + +#ifdef CONFIG_IWLWIFI_DEBUG + if (iwl_debug_level & IWL_DL_FW_ERRORS) { + iwl_dump_nic_error_log(priv); + iwl_dump_nic_event_log(priv); + iwl_print_rx_config_cmd(&priv->staging_rxon); + } +#endif + + wake_up_interruptible(&priv->wait_command_queue); + + /* Keep the restart process from trying to send host + * commands by clearing the INIT status bit */ + clear_bit(STATUS_READY, &priv->status); + + if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) { + IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS, + "Restarting adapter due to uCode error.\n"); + + if (iwl_is_associated(priv)) { + memcpy(&priv->recovery_rxon, &priv->active_rxon, + sizeof(priv->recovery_rxon)); + priv->error_recovering = 1; + } + queue_work(priv->workqueue, &priv->restart); + } +} + +static void iwl_error_recovery(struct iwl_priv *priv) +{ + unsigned long flags; + + memcpy(&priv->staging_rxon, &priv->recovery_rxon, + sizeof(priv->staging_rxon)); + priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK; + iwl_commit_rxon(priv); + + iwl_add_station(priv, priv->bssid, 1, 0); + + spin_lock_irqsave(&priv->lock, flags); + priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id); + priv->error_recovering = 0; + spin_unlock_irqrestore(&priv->lock, flags); +} + +static void iwl_irq_tasklet(struct iwl_priv *priv) +{ + u32 inta, handled = 0; + u32 inta_fh; + unsigned long flags; +#ifdef CONFIG_IWLWIFI_DEBUG + u32 inta_mask; +#endif + + spin_lock_irqsave(&priv->lock, flags); + + /* Ack/clear/reset pending uCode interrupts. + * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS, + * and will clear only when CSR_FH_INT_STATUS gets cleared. */ + inta = iwl_read32(priv, CSR_INT); + iwl_write32(priv, CSR_INT, inta); + + /* Ack/clear/reset pending flow-handler (DMA) interrupts. + * Any new interrupts that happen after this, either while we're + * in this tasklet, or later, will show up in next ISR/tasklet. */ + inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS); + iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh); + +#ifdef CONFIG_IWLWIFI_DEBUG + if (iwl_debug_level & IWL_DL_ISR) { + inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */ + IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", + inta, inta_mask, inta_fh); + } +#endif + + /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not + * atomic, make sure that inta covers all the interrupts that + * we've discovered, even if FH interrupt came in just after + * reading CSR_INT. */ + if (inta_fh & CSR_FH_INT_RX_MASK) + inta |= CSR_INT_BIT_FH_RX; + if (inta_fh & CSR_FH_INT_TX_MASK) + inta |= CSR_INT_BIT_FH_TX; + + /* Now service all interrupt bits discovered above. */ + if (inta & CSR_INT_BIT_HW_ERR) { + IWL_ERROR("Microcode HW error detected. Restarting.\n"); + + /* Tell the device to stop sending interrupts */ + iwl_disable_interrupts(priv); + + iwl_irq_handle_error(priv); + + handled |= CSR_INT_BIT_HW_ERR; + + spin_unlock_irqrestore(&priv->lock, flags); + + return; + } + +#ifdef CONFIG_IWLWIFI_DEBUG + if (iwl_debug_level & (IWL_DL_ISR)) { + /* NIC fires this, but we don't use it, redundant with WAKEUP */ + if (inta & CSR_INT_BIT_MAC_CLK_ACTV) + IWL_DEBUG_ISR("Microcode started or stopped.\n"); + + /* Alive notification via Rx interrupt will do the real work */ + if (inta & CSR_INT_BIT_ALIVE) + IWL_DEBUG_ISR("Alive interrupt\n"); + } +#endif + /* Safely ignore these bits for debug checks below */ + inta &= ~(CSR_INT_BIT_MAC_CLK_ACTV | CSR_INT_BIT_ALIVE); + + /* HW RF KILL switch toggled (4965 only) */ + if (inta & CSR_INT_BIT_RF_KILL) { + int hw_rf_kill = 0; + if (!(iwl_read32(priv, CSR_GP_CNTRL) & + CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)) + hw_rf_kill = 1; + + IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR, + "RF_KILL bit toggled to %s.\n", + hw_rf_kill ? "disable radio":"enable radio"); + + /* Queue restart only if RF_KILL switch was set to "kill" + * when we loaded driver, and is now set to "enable". + * After we're Alive, RF_KILL gets handled by + * iwl_rx_card_state_notif() */ + if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) + queue_work(priv->workqueue, &priv->restart); + + handled |= CSR_INT_BIT_RF_KILL; + } + + /* Chip got too hot and stopped itself (4965 only) */ + if (inta & CSR_INT_BIT_CT_KILL) { + IWL_ERROR("Microcode CT kill error detected.\n"); + handled |= CSR_INT_BIT_CT_KILL; + } + + /* Error detected by uCode */ + if (inta & CSR_INT_BIT_SW_ERR) { + IWL_ERROR("Microcode SW error detected. Restarting 0x%X.\n", + inta); + iwl_irq_handle_error(priv); + handled |= CSR_INT_BIT_SW_ERR; + } + + /* uCode wakes up after power-down sleep */ + if (inta & CSR_INT_BIT_WAKEUP) { + IWL_DEBUG_ISR("Wakeup interrupt\n"); + iwl_rx_queue_update_write_ptr(priv, &priv->rxq); + iwl_tx_queue_update_write_ptr(priv, &priv->txq[0]); + iwl_tx_queue_update_write_ptr(priv, &priv->txq[1]); + iwl_tx_queue_update_write_ptr(priv, &priv->txq[2]); + iwl_tx_queue_update_write_ptr(priv, &priv->txq[3]); + iwl_tx_queue_update_write_ptr(priv, &priv->txq[4]); + iwl_tx_queue_update_write_ptr(priv, &priv->txq[5]); + + handled |= CSR_INT_BIT_WAKEUP; + } + + /* All uCode command responses, including Tx command responses, + * Rx "responses" (frame-received notification), and other + * notifications from uCode come through here*/ + if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) { + iwl_rx_handle(priv); + handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX); + } + + if (inta & CSR_INT_BIT_FH_TX) { + IWL_DEBUG_ISR("Tx interrupt\n"); + + iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6)); + if (!iwl_grab_restricted_access(priv)) { + iwl_write_restricted(priv, + FH_TCSR_CREDIT + (ALM_FH_SRVC_CHNL), 0x0); + iwl_release_restricted_access(priv); + } + handled |= CSR_INT_BIT_FH_TX; + } + + if (inta & ~handled) + IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled); + + if (inta & ~CSR_INI_SET_MASK) { + IWL_WARNING("Disabled INTA bits 0x%08x were pending\n", + inta & ~CSR_INI_SET_MASK); + IWL_WARNING(" with FH_INT = 0x%08x\n", inta_fh); + } + + /* Re-enable all interrupts */ + iwl_enable_interrupts(priv); + +#ifdef CONFIG_IWLWIFI_DEBUG + if (iwl_debug_level & (IWL_DL_ISR)) { + inta = iwl_read32(priv, CSR_INT); + inta_mask = iwl_read32(priv, CSR_INT_MASK); + inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS); + IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, " + "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags); + } +#endif + spin_unlock_irqrestore(&priv->lock, flags); +} + +static irqreturn_t iwl_isr(int irq, void *data) +{ + struct iwl_priv *priv = data; + u32 inta, inta_mask; + u32 inta_fh; + if (!priv) + return IRQ_NONE; + + spin_lock(&priv->lock); + + /* Disable (but don't clear!) interrupts here to avoid + * back-to-back ISRs and sporadic interrupts from our NIC. + * If we have something to service, the tasklet will re-enable ints. + * If we *don't* have something, we'll re-enable before leaving here. */ + inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */ + iwl_write32(priv, CSR_INT_MASK, 0x00000000); + + /* Discover which interrupts are active/pending */ + inta = iwl_read32(priv, CSR_INT); + inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS); + + /* Ignore interrupt if there's nothing in NIC to service. + * This may be due to IRQ shared with another device, + * or due to sporadic interrupts thrown from our NIC. */ + if (!inta && !inta_fh) { + IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n"); + goto none; + } + + if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) { + /* Hardware disappeared */ + IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta); + goto none; + } + + IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", + inta, inta_mask, inta_fh); + + /* iwl_irq_tasklet() will service interrupts and re-enable them */ + tasklet_schedule(&priv->irq_tasklet); + spin_unlock(&priv->lock); + + return IRQ_HANDLED; + + none: + /* re-enable interrupts here since we don't have anything to service. */ + iwl_enable_interrupts(priv); + spin_unlock(&priv->lock); + return IRQ_NONE; +} + +/************************** EEPROM BANDS **************************** + * + * The iwl_eeprom_band definitions below provide the mapping from the + * EEPROM contents to the specific channel number supported for each + * band. + * + * For example, iwl_priv->eeprom.band_3_channels[4] from the band_3 + * definition below maps to physical channel 42 in the 5.2GHz spectrum. + * The specific geography and calibration information for that channel + * is contained in the eeprom map itself. + * + * During init, we copy the eeprom information and channel map + * information into priv->channel_info_24/52 and priv->channel_map_24/52 + * + * channel_map_24/52 provides the index in the channel_info array for a + * given channel. We have to have two separate maps as there is channel + * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and + * band_2 + * + * A value of 0xff stored in the channel_map indicates that the channel + * is not supported by the hardware at all. + * + * A value of 0xfe in the channel_map indicates that the channel is not + * valid for Tx with the current hardware. This means that + * while the system can tune and receive on a given channel, it may not + * be able to associate or transmit any frames on that + * channel. There is no corresponding channel information for that + * entry. + * + *********************************************************************/ + +/* 2.4 GHz */ +static const u8 iwl_eeprom_band_1[14] = { + 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 +}; + +/* 5.2 GHz bands */ +static const u8 iwl_eeprom_band_2[] = { + 183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16 +}; + +static const u8 iwl_eeprom_band_3[] = { /* 5205-5320MHz */ + 34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64 +}; + +static const u8 iwl_eeprom_band_4[] = { /* 5500-5700MHz */ + 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140 +}; + +static const u8 iwl_eeprom_band_5[] = { /* 5725-5825MHz */ + 145, 149, 153, 157, 161, 165 +}; + +static void iwl_init_band_reference(const struct iwl_priv *priv, int band, + int *eeprom_ch_count, + const struct iwl_eeprom_channel + **eeprom_ch_info, + const u8 **eeprom_ch_index) +{ + switch (band) { + case 1: /* 2.4GHz band */ + *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_1); + *eeprom_ch_info = priv->eeprom.band_1_channels; + *eeprom_ch_index = iwl_eeprom_band_1; + break; + case 2: /* 5.2GHz band */ + *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_2); + *eeprom_ch_info = priv->eeprom.band_2_channels; + *eeprom_ch_index = iwl_eeprom_band_2; + break; + case 3: /* 5.2GHz band */ + *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_3); + *eeprom_ch_info = priv->eeprom.band_3_channels; + *eeprom_ch_index = iwl_eeprom_band_3; + break; + case 4: /* 5.2GHz band */ + *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_4); + *eeprom_ch_info = priv->eeprom.band_4_channels; + *eeprom_ch_index = iwl_eeprom_band_4; + break; + case 5: /* 5.2GHz band */ + *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_5); + *eeprom_ch_info = priv->eeprom.band_5_channels; + *eeprom_ch_index = iwl_eeprom_band_5; + break; + default: + BUG(); + return; + } +} + +const struct iwl_channel_info *iwl_get_channel_info(const struct iwl_priv *priv, + int phymode, u16 channel) +{ + int i; + + switch (phymode) { + case MODE_IEEE80211A: + for (i = 14; i < priv->channel_count; i++) { + if (priv->channel_info[i].channel == channel) + return &priv->channel_info[i]; + } + break; + + case MODE_IEEE80211B: + case MODE_IEEE80211G: + if (channel >= 1 && channel <= 14) + return &priv->channel_info[channel - 1]; + break; + + } + + return NULL; +} + +#define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \ + ? # x " " : "") + +static int iwl_init_channel_map(struct iwl_priv *priv) +{ + int eeprom_ch_count = 0; + const u8 *eeprom_ch_index = NULL; + const struct iwl_eeprom_channel *eeprom_ch_info = NULL; + int band, ch; + struct iwl_channel_info *ch_info; + + if (priv->channel_count) { + IWL_DEBUG_INFO("Channel map already initialized.\n"); + return 0; + } + + if (priv->eeprom.version < 0x2f) { + IWL_WARNING("Unsupported EEPROM version: 0x%04X\n", + priv->eeprom.version); + return -EINVAL; + } + + IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n"); + + priv->channel_count = + ARRAY_SIZE(iwl_eeprom_band_1) + + ARRAY_SIZE(iwl_eeprom_band_2) + + ARRAY_SIZE(iwl_eeprom_band_3) + + ARRAY_SIZE(iwl_eeprom_band_4) + + ARRAY_SIZE(iwl_eeprom_band_5); + + IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count); + + priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) * + priv->channel_count, GFP_KERNEL); + if (!priv->channel_info) { + IWL_ERROR("Could not allocate channel_info\n"); + priv->channel_count = 0; + return -ENOMEM; + } + + ch_info = priv->channel_info; + + /* Loop through the 5 EEPROM bands adding them in order to the + * channel map we maintain (that contains additional information than + * what just in the EEPROM) */ + for (band = 1; band <= 5; band++) { + + iwl_init_band_reference(priv, band, &eeprom_ch_count, + &eeprom_ch_info, &eeprom_ch_index); + + /* Loop through each band adding each of the channels */ + for (ch = 0; ch < eeprom_ch_count; ch++) { + ch_info->channel = eeprom_ch_index[ch]; + ch_info->phymode = (band == 1) ? MODE_IEEE80211B : + MODE_IEEE80211A; + + /* permanently store EEPROM's channel regulatory flags + * and max power in channel info database. */ + ch_info->eeprom = eeprom_ch_info[ch]; + + /* Copy the run-time flags so they are there even on + * invalid channels */ + ch_info->flags = eeprom_ch_info[ch].flags; + + if (!(is_channel_valid(ch_info))) { + IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - " + "No traffic\n", + ch_info->channel, + ch_info->flags, + is_channel_a_band(ch_info) ? + "5.2" : "2.4"); + ch_info++; + continue; + } + + /* Initialize regulatory-based run-time data */ + ch_info->max_power_avg = ch_info->curr_txpow = + eeprom_ch_info[ch].max_power_avg; + ch_info->scan_power = eeprom_ch_info[ch].max_power_avg; + ch_info->min_power = 0; + + IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x" + " %ddBm): Ad-Hoc %ssupported\n", + ch_info->channel, + is_channel_a_band(ch_info) ? + "5.2" : "2.4", + CHECK_AND_PRINT(IBSS), + CHECK_AND_PRINT(ACTIVE), + CHECK_AND_PRINT(RADAR), + CHECK_AND_PRINT(WIDE), + CHECK_AND_PRINT(NARROW), + CHECK_AND_PRINT(DFS), + eeprom_ch_info[ch].flags, + eeprom_ch_info[ch].max_power_avg, + ((eeprom_ch_info[ch]. + flags & EEPROM_CHANNEL_IBSS) + && !(eeprom_ch_info[ch]. + flags & EEPROM_CHANNEL_RADAR)) + ? "" : "not "); + + /* Set the user_txpower_limit to the highest power + * supported by any channel */ + if (eeprom_ch_info[ch].max_power_avg > + priv->user_txpower_limit) + priv->user_txpower_limit = + eeprom_ch_info[ch].max_power_avg; + + ch_info++; + } + } + + if (iwl3945_txpower_set_from_eeprom(priv)) + return -EIO; + + return 0; +} + +/* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after + * sending probe req. This should be set long enough to hear probe responses + * from more than one AP. */ +#define IWL_ACTIVE_DWELL_TIME_24 (20) /* all times in msec */ +#define IWL_ACTIVE_DWELL_TIME_52 (10) + +/* For faster active scanning, scan will move to the next channel if fewer than + * PLCP_QUIET_THRESH packets are heard on this channel within + * ACTIVE_QUIET_TIME after sending probe request. This shortens the dwell + * time if it's a quiet channel (nothing responded to our probe, and there's + * no other traffic). + * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */ +#define IWL_PLCP_QUIET_THRESH __constant_cpu_to_le16(1) /* packets */ +#define IWL_ACTIVE_QUIET_TIME __constant_cpu_to_le16(5) /* msec */ + +/* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel. + * Must be set longer than active dwell time. + * For the most reliable scan, set > AP beacon interval (typically 100msec). */ +#define IWL_PASSIVE_DWELL_TIME_24 (20) /* all times in msec */ +#define IWL_PASSIVE_DWELL_TIME_52 (10) +#define IWL_PASSIVE_DWELL_BASE (100) +#define IWL_CHANNEL_TUNE_TIME 5 + +static inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv, int phymode) +{ + if (phymode == MODE_IEEE80211A) + return IWL_ACTIVE_DWELL_TIME_52; + else + return IWL_ACTIVE_DWELL_TIME_24; +} + +static u16 iwl_get_passive_dwell_time(struct iwl_priv *priv, int phymode) +{ + u16 active = iwl_get_active_dwell_time(priv, phymode); + u16 passive = (phymode != MODE_IEEE80211A) ? + IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 : + IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52; + + if (iwl_is_associated(priv)) { + /* If we're associated, we clamp the maximum passive + * dwell time to be 98% of the beacon interval (minus + * 2 * channel tune time) */ + passive = priv->beacon_int; + if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive) + passive = IWL_PASSIVE_DWELL_BASE; + passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2; + } + + if (passive <= active) + passive = active + 1; + + return passive; +} + +static int iwl_get_channels_for_scan(struct iwl_priv *priv, int phymode, + u8 is_active, u8 direct_mask, + struct iwl_scan_channel *scan_ch) +{ + const struct ieee80211_channel *channels = NULL; + const struct ieee80211_hw_mode *hw_mode; + const struct iwl_channel_info *ch_info; + u16 passive_dwell = 0; + u16 active_dwell = 0; + int added, i; + + hw_mode = iwl_get_hw_mode(priv, phymode); + if (!hw_mode) + return 0; + + channels = hw_mode->channels; + + active_dwell = iwl_get_active_dwell_time(priv, phymode); + passive_dwell = iwl_get_passive_dwell_time(priv, phymode); + + for (i = 0, added = 0; i < hw_mode->num_channels; i++) { + if (channels[i].chan == + le16_to_cpu(priv->active_rxon.channel)) { + if (iwl_is_associated(priv)) { + IWL_DEBUG_SCAN + ("Skipping current channel %d\n", + le16_to_cpu(priv->active_rxon.channel)); + continue; + } + } else if (priv->only_active_channel) + continue; + + scan_ch->channel = channels[i].chan; + + ch_info = iwl_get_channel_info(priv, phymode, scan_ch->channel); + if (!is_channel_valid(ch_info)) { + IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n", + scan_ch->channel); + continue; + } + + if (!is_active || is_channel_passive(ch_info) || + !(channels[i].flag & IEEE80211_CHAN_W_ACTIVE_SCAN)) + scan_ch->type = 0; /* passive */ + else + scan_ch->type = 1; /* active */ + + if (scan_ch->type & 1) + scan_ch->type |= (direct_mask << 1); + + if (is_channel_narrow(ch_info)) + scan_ch->type |= (1 << 7); + + scan_ch->active_dwell = cpu_to_le16(active_dwell); + scan_ch->passive_dwell = cpu_to_le16(passive_dwell); + + /* Set power levels to defaults */ + scan_ch->tpc.dsp_atten = 110; + /* scan_pwr_info->tpc.dsp_atten; */ + + /*scan_pwr_info->tpc.tx_gain; */ + if (phymode == MODE_IEEE80211A) + scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3; + else { + scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3)); + /* NOTE: if we were doing 6Mb OFDM for scans we'd use + * power level + scan_ch->tpc.tx_gain = ((1<<5) | (2 << 3)) | 3; + */ + } + + IWL_DEBUG_SCAN("Scanning %d [%s %d]\n", + scan_ch->channel, + (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE", + (scan_ch->type & 1) ? + active_dwell : passive_dwell); + + scan_ch++; + added++; + } + + IWL_DEBUG_SCAN("total channels to scan %d \n", added); + return added; +} + +static void iwl_reset_channel_flag(struct iwl_priv *priv) +{ + int i, j; + for (i = 0; i < 3; i++) { + struct ieee80211_hw_mode *hw_mode = (void *)&priv->modes[i]; + for (j = 0; j < hw_mode->num_channels; j++) + hw_mode->channels[j].flag = hw_mode->channels[j].val; + } +} + +static void iwl_init_hw_rates(struct iwl_priv *priv, + struct ieee80211_rate *rates) +{ + int i; + + for (i = 0; i < IWL_RATE_COUNT; i++) { + rates[i].rate = iwl_rates[i].ieee * 5; + rates[i].val = i; /* Rate scaling will work on indexes */ + rates[i].val2 = i; + rates[i].flags = IEEE80211_RATE_SUPPORTED; + /* Only OFDM have the bits-per-symbol set */ + if ((i <= IWL_LAST_OFDM_RATE) && (i >= IWL_FIRST_OFDM_RATE)) + rates[i].flags |= IEEE80211_RATE_OFDM; + else { + /* + * If CCK 1M then set rate flag to CCK else CCK_2 + * which is CCK | PREAMBLE2 + */ + rates[i].flags |= (iwl_rates[i].plcp == 10) ? + IEEE80211_RATE_CCK : IEEE80211_RATE_CCK_2; + } + + /* Set up which ones are basic rates... */ + if (IWL_BASIC_RATES_MASK & (1 << i)) + rates[i].flags |= IEEE80211_RATE_BASIC; + } +} + +/** + * iwl_init_geos - Initialize mac80211's geo/channel info based from eeprom + */ +static int iwl_init_geos(struct iwl_priv *priv) +{ + struct iwl_channel_info *ch; + struct ieee80211_hw_mode *modes; + struct ieee80211_channel *channels; + struct ieee80211_channel *geo_ch; + struct ieee80211_rate *rates; + int i = 0; + enum { + A = 0, + B = 1, + G = 2, + }; + int mode_count = 3; + + if (priv->modes) { + IWL_DEBUG_INFO("Geography modes already initialized.\n"); + set_bit(STATUS_GEO_CONFIGURED, &priv->status); + return 0; + } + + modes = kzalloc(sizeof(struct ieee80211_hw_mode) * mode_count, + GFP_KERNEL); + if (!modes) + return -ENOMEM; + + channels = kzalloc(sizeof(struct ieee80211_channel) * + priv->channel_count, GFP_KERNEL); + if (!channels) { + kfree(modes); + return -ENOMEM; + } + + rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_MAX_RATES + 1)), + GFP_KERNEL); + if (!rates) { + kfree(modes); + kfree(channels); + return -ENOMEM; + } + + /* 0 = 802.11a + * 1 = 802.11b + * 2 = 802.11g + */ + + /* 5.2GHz channels start after the 2.4GHz channels */ + modes[A].mode = MODE_IEEE80211A; + modes[A].channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)]; + modes[A].rates = rates; + modes[A].num_rates = 8; /* just OFDM */ + modes[A].num_channels = 0; + + modes[B].mode = MODE_IEEE80211B; + modes[B].channels = channels; + modes[B].rates = &rates[8]; + modes[B].num_rates = 4; /* just CCK */ + modes[B].num_channels = 0; + + modes[G].mode = MODE_IEEE80211G; + modes[G].channels = channels; + modes[G].rates = rates; + modes[G].num_rates = 12; /* OFDM & CCK */ + modes[G].num_channels = 0; + + priv->ieee_channels = channels; + priv->ieee_rates = rates; + + iwl_init_hw_rates(priv, rates); + + for (i = 0, geo_ch = channels; i < priv->channel_count; i++) { + ch = &priv->channel_info[i]; + + if (!is_channel_valid(ch)) { + IWL_DEBUG_INFO("Channel %d [%sGHz] is restricted -- " + "skipping.\n", + ch->channel, is_channel_a_band(ch) ? + "5.2" : "2.4"); + continue; + } + + if (is_channel_a_band(ch)) + geo_ch = &modes[A].channels[modes[A].num_channels++]; + else { + geo_ch = &modes[B].channels[modes[B].num_channels++]; + modes[G].num_channels++; + } + + geo_ch->freq = ieee80211chan2mhz(ch->channel); + geo_ch->chan = ch->channel; + geo_ch->power_level = ch->max_power_avg; + geo_ch->antenna_max = 0xff; + + if (is_channel_valid(ch)) { + geo_ch->flag = IEEE80211_CHAN_W_SCAN; + if (ch->flags & EEPROM_CHANNEL_IBSS) + geo_ch->flag |= IEEE80211_CHAN_W_IBSS; + + if (ch->flags & EEPROM_CHANNEL_ACTIVE) + geo_ch->flag |= IEEE80211_CHAN_W_ACTIVE_SCAN; + + if (ch->flags & EEPROM_CHANNEL_RADAR) + geo_ch->flag |= IEEE80211_CHAN_W_RADAR_DETECT; + + if (ch->max_power_avg > priv->max_channel_txpower_limit) + priv->max_channel_txpower_limit = + ch->max_power_avg; + } + + geo_ch->val = geo_ch->flag; + } + + if ((modes[A].num_channels == 0) && priv->is_abg) { + printk(KERN_INFO DRV_NAME + ": Incorrectly detected BG card as ABG. Please send " + "your PCI ID 0x%04X:0x%04X to maintainer.\n", + priv->pci_dev->device, priv->pci_dev->subsystem_device); + priv->is_abg = 0; + } + + printk(KERN_INFO DRV_NAME + ": Tunable channels: %d 802.11bg, %d 802.11a channels\n", + modes[G].num_channels, modes[A].num_channels); + + /* + * NOTE: We register these in preference of order -- the + * stack doesn't currently (as of 7.0.6 / Apr 24 '07) pick + * a phymode based on rates or AP capabilities but seems to + * configure it purely on if the channel being configured + * is supported by a mode -- and the first match is taken + */ + + if (modes[G].num_channels) + ieee80211_register_hwmode(priv->hw, &modes[G]); + if (modes[B].num_channels) + ieee80211_register_hwmode(priv->hw, &modes[B]); + if (modes[A].num_channels) + ieee80211_register_hwmode(priv->hw, &modes[A]); + + priv->modes = modes; + set_bit(STATUS_GEO_CONFIGURED, &priv->status); + + return 0; +} + +/****************************************************************************** + * + * uCode download functions + * + ******************************************************************************/ + +static void iwl_dealloc_ucode_pci(struct iwl_priv *priv) +{ + if (priv->ucode_code.v_addr != NULL) { + pci_free_consistent(priv->pci_dev, + priv->ucode_code.len, + priv->ucode_code.v_addr, + priv->ucode_code.p_addr); + priv->ucode_code.v_addr = NULL; + } + if (priv->ucode_data.v_addr != NULL) { + pci_free_consistent(priv->pci_dev, + priv->ucode_data.len, + priv->ucode_data.v_addr, + priv->ucode_data.p_addr); + priv->ucode_data.v_addr = NULL; + } + if (priv->ucode_data_backup.v_addr != NULL) { + pci_free_consistent(priv->pci_dev, + priv->ucode_data_backup.len, + priv->ucode_data_backup.v_addr, + priv->ucode_data_backup.p_addr); + priv->ucode_data_backup.v_addr = NULL; + } + if (priv->ucode_init.v_addr != NULL) { + pci_free_consistent(priv->pci_dev, + priv->ucode_init.len, + priv->ucode_init.v_addr, + priv->ucode_init.p_addr); + priv->ucode_init.v_addr = NULL; + } + if (priv->ucode_init_data.v_addr != NULL) { + pci_free_consistent(priv->pci_dev, + priv->ucode_init_data.len, + priv->ucode_init_data.v_addr, + priv->ucode_init_data.p_addr); + priv->ucode_init_data.v_addr = NULL; + } + if (priv->ucode_boot.v_addr != NULL) { + pci_free_consistent(priv->pci_dev, + priv->ucode_boot.len, + priv->ucode_boot.v_addr, + priv->ucode_boot.p_addr); + priv->ucode_boot.v_addr = NULL; + } +} + +/** + * iwl_verify_inst_full - verify runtime uCode image in card vs. host, + * looking at all data. + */ +static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 * image, u32 len) +{ + u32 val; + u32 save_len = len; + int rc = 0; + u32 errcnt; + + IWL_DEBUG_INFO("ucode inst image size is %u\n", len); + + rc = iwl_grab_restricted_access(priv); + if (rc) + return rc; + + iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND); + + errcnt = 0; + for (; len > 0; len -= sizeof(u32), image++) { + /* read data comes through single port, auto-incr addr */ + /* NOTE: Use the debugless read so we don't flood kernel log + * if IWL_DL_IO is set */ + val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT); + if (val != le32_to_cpu(*image)) { + IWL_ERROR("uCode INST section is invalid at " + "offset 0x%x, is 0x%x, s/b 0x%x\n", + save_len - len, val, le32_to_cpu(*image)); + rc = -EIO; + errcnt++; + if (errcnt >= 20) + break; + } + } + + iwl_release_restricted_access(priv); + + if (!errcnt) + IWL_DEBUG_INFO + ("ucode image in INSTRUCTION memory is good\n"); + + return rc; +} + + +/** + * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host, + * using sample data 100 bytes apart. If these sample points are good, + * it's a pretty good bet that everything between them is good, too. + */ +static int iwl_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len) +{ + u32 val; + int rc = 0; + u32 errcnt = 0; + u32 i; + + IWL_DEBUG_INFO("ucode inst image size is %u\n", len); + + rc = iwl_grab_restricted_access(priv); + if (rc) + return rc; + + for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) { + /* read data comes through single port, auto-incr addr */ + /* NOTE: Use the debugless read so we don't flood kernel log + * if IWL_DL_IO is set */ + iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR, + i + RTC_INST_LOWER_BOUND); + val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT); + if (val != le32_to_cpu(*image)) { +#if 0 /* Enable this if you want to see details */ + IWL_ERROR("uCode INST section is invalid at " + "offset 0x%x, is 0x%x, s/b 0x%x\n", + i, val, *image); +#endif + rc = -EIO; + errcnt++; + if (errcnt >= 3) + break; + } + } + + iwl_release_restricted_access(priv); + + return rc; +} + + +/** + * iwl_verify_ucode - determine which instruction image is in SRAM, + * and verify its contents + */ +static int iwl_verify_ucode(struct iwl_priv *priv) +{ + __le32 *image; + u32 len; + int rc = 0; + + /* Try bootstrap */ + image = (__le32 *)priv->ucode_boot.v_addr; + len = priv->ucode_boot.len; + rc = iwl_verify_inst_sparse(priv, image, len); + if (rc == 0) { + IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n"); + return 0; + } + + /* Try initialize */ + image = (__le32 *)priv->ucode_init.v_addr; + len = priv->ucode_init.len; + rc = iwl_verify_inst_sparse(priv, image, len); + if (rc == 0) { + IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n"); + return 0; + } + + /* Try runtime/protocol */ + image = (__le32 *)priv->ucode_code.v_addr; + len = priv->ucode_code.len; + rc = iwl_verify_inst_sparse(priv, image, len); + if (rc == 0) { + IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n"); + return 0; + } + + IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n"); + + /* Show first several data entries in instruction SRAM. + * Selection of bootstrap image is arbitrary. */ + image = (__le32 *)priv->ucode_boot.v_addr; + len = priv->ucode_boot.len; + rc = iwl_verify_inst_full(priv, image, len); + + return rc; +} + + +/* check contents of special bootstrap uCode SRAM */ +static int iwl_verify_bsm(struct iwl_priv *priv) +{ + __le32 *image = priv->ucode_boot.v_addr; + u32 len = priv->ucode_boot.len; + u32 reg; + u32 val; + + IWL_DEBUG_INFO("Begin verify bsm\n"); + + /* verify BSM SRAM contents */ + val = iwl_read_restricted_reg(priv, BSM_WR_DWCOUNT_REG); + for (reg = BSM_SRAM_LOWER_BOUND; + reg < BSM_SRAM_LOWER_BOUND + len; + reg += sizeof(u32), image ++) { + val = iwl_read_restricted_reg(priv, reg); + if (val != le32_to_cpu(*image)) { + IWL_ERROR("BSM uCode verification failed at " + "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n", + BSM_SRAM_LOWER_BOUND, + reg - BSM_SRAM_LOWER_BOUND, len, + val, le32_to_cpu(*image)); + return -EIO; + } + } + + IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n"); + + return 0; +} + +/** + * iwl_load_bsm - Load bootstrap instructions + * + * BSM operation: + * + * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program + * in special SRAM that does not power down during RFKILL. When powering back + * up after power-saving sleeps (or during initial uCode load), the BSM loads + * the bootstrap program into the on-board processor, and starts it. + * + * The bootstrap program loads (via DMA) instructions and data for a new + * program from host DRAM locations indicated by the host driver in the + * BSM_DRAM_* registers. Once the new program is loaded, it starts + * automatically. + * + * When initializing the NIC, the host driver points the BSM to the + * "initialize" uCode image. This uCode sets up some internal data, then + * notifies host via "initialize alive" that it is complete. + * + * The host then replaces the BSM_DRAM_* pointer values to point to the + * normal runtime uCode instructions and a backup uCode data cache buffer + * (filled initially with starting data values for the on-board processor), + * then triggers the "initialize" uCode to load and launch the runtime uCode, + * which begins normal operation. + * + * When doing a power-save shutdown, runtime uCode saves data SRAM into + * the backup data cache in DRAM before SRAM is powered down. + * + * When powering back up, the BSM loads the bootstrap program. This reloads + * the runtime uCode instructions and the backup data cache into SRAM, + * and re-launches the runtime uCode from where it left off. + */ +static int iwl_load_bsm(struct iwl_priv *priv) +{ + __le32 *image = priv->ucode_boot.v_addr; + u32 len = priv->ucode_boot.len; + dma_addr_t pinst; + dma_addr_t pdata; + u32 inst_len; + u32 data_len; + int rc; + int i; + u32 done; + u32 reg_offset; + + IWL_DEBUG_INFO("Begin load bsm\n"); + + /* make sure bootstrap program is no larger than BSM's SRAM size */ + if (len > IWL_MAX_BSM_SIZE) + return -EINVAL; + + /* Tell bootstrap uCode where to find the "Initialize" uCode + * in host DRAM ... bits 31:0 for 3945, bits 35:4 for 4965. + * NOTE: iwl_initialize_alive_start() will replace these values, + * after the "initialize" uCode has run, to point to + * runtime/protocol instructions and backup data cache. */ + pinst = priv->ucode_init.p_addr; + pdata = priv->ucode_init_data.p_addr; + inst_len = priv->ucode_init.len; + data_len = priv->ucode_init_data.len; + + rc = iwl_grab_restricted_access(priv); + if (rc) + return rc; + + iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst); + iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata); + iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len); + iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len); + + /* Fill BSM memory with bootstrap instructions */ + for (reg_offset = BSM_SRAM_LOWER_BOUND; + reg_offset < BSM_SRAM_LOWER_BOUND + len; + reg_offset += sizeof(u32), image++) + _iwl_write_restricted_reg(priv, reg_offset, + le32_to_cpu(*image)); + + rc = iwl_verify_bsm(priv); + if (rc) { + iwl_release_restricted_access(priv); + return rc; + } + + /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */ + iwl_write_restricted_reg(priv, BSM_WR_MEM_SRC_REG, 0x0); + iwl_write_restricted_reg(priv, BSM_WR_MEM_DST_REG, + RTC_INST_LOWER_BOUND); + iwl_write_restricted_reg(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32)); + + /* Load bootstrap code into instruction SRAM now, + * to prepare to load "initialize" uCode */ + iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG, + BSM_WR_CTRL_REG_BIT_START); + + /* Wait for load of bootstrap uCode to finish */ + for (i = 0; i < 100; i++) { + done = iwl_read_restricted_reg(priv, BSM_WR_CTRL_REG); + if (!(done & BSM_WR_CTRL_REG_BIT_START)) + break; + udelay(10); + } + if (i < 100) + IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i); + else { + IWL_ERROR("BSM write did not complete!\n"); + return -EIO; + } + + /* Enable future boot loads whenever power management unit triggers it + * (e.g. when powering back up after power-save shutdown) */ + iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG, + BSM_WR_CTRL_REG_BIT_START_EN); + + iwl_release_restricted_access(priv); + + return 0; +} + +static void iwl_nic_start(struct iwl_priv *priv) +{ + /* Remove all resets to allow NIC to operate */ + iwl_write32(priv, CSR_RESET, 0); +} + +/** + * iwl_read_ucode - Read uCode images from disk file. + * + * Copy into buffers for card to fetch via bus-mastering + */ +static int iwl_read_ucode(struct iwl_priv *priv) +{ + struct iwl_ucode *ucode; + int rc = 0; + const struct firmware *ucode_raw; + /* firmware file name contains uCode/driver compatibility version */ + const char *name = "iwlwifi-3945" IWL3945_UCODE_API ".ucode"; + u8 *src; + size_t len; + u32 ver, inst_size, data_size, init_size, init_data_size, boot_size; + + /* Ask kernel firmware_class module to get the boot firmware off disk. + * request_firmware() is synchronous, file is in memory on return. */ + rc = request_firmware(&ucode_raw, name, &priv->pci_dev->dev); + if (rc < 0) { + IWL_ERROR("%s firmware file req failed: Reason %d\n", name, rc); + goto error; + } + + IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n", + name, ucode_raw->size); + + /* Make sure that we got at least our header! */ + if (ucode_raw->size < sizeof(*ucode)) { + IWL_ERROR("File size way too small!\n"); + rc = -EINVAL; + goto err_release; + } + + /* Data from ucode file: header followed by uCode images */ + ucode = (void *)ucode_raw->data; + + ver = le32_to_cpu(ucode->ver); + inst_size = le32_to_cpu(ucode->inst_size); + data_size = le32_to_cpu(ucode->data_size); + init_size = le32_to_cpu(ucode->init_size); + init_data_size = le32_to_cpu(ucode->init_data_size); + boot_size = le32_to_cpu(ucode->boot_size); + + IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver); + IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n", + inst_size); + IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n", + data_size); + IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n", + init_size); + IWL_DEBUG_INFO("f/w package hdr init data size = %u\n", + init_data_size); + IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n", + boot_size); + + /* Verify size of file vs. image size info in file's header */ + if (ucode_raw->size < sizeof(*ucode) + + inst_size + data_size + init_size + + init_data_size + boot_size) { + + IWL_DEBUG_INFO("uCode file size %d too small\n", + (int)ucode_raw->size); + rc = -EINVAL; + goto err_release; + } + + /* Verify that uCode images will fit in card's SRAM */ + if (inst_size > IWL_MAX_INST_SIZE) { + IWL_DEBUG_INFO("uCode instr len %d too large to fit in card\n", + (int)inst_size); + rc = -EINVAL; + goto err_release; + } + + if (data_size > IWL_MAX_DATA_SIZE) { + IWL_DEBUG_INFO("uCode data len %d too large to fit in card\n", + (int)data_size); + rc = -EINVAL; + goto err_release; + } + if (init_size > IWL_MAX_INST_SIZE) { + IWL_DEBUG_INFO + ("uCode init instr len %d too large to fit in card\n", + (int)init_size); + rc = -EINVAL; + goto err_release; + } + if (init_data_size > IWL_MAX_DATA_SIZE) { + IWL_DEBUG_INFO + ("uCode init data len %d too large to fit in card\n", + (int)init_data_size); + rc = -EINVAL; + goto err_release; + } + if (boot_size > IWL_MAX_BSM_SIZE) { + IWL_DEBUG_INFO + ("uCode boot instr len %d too large to fit in bsm\n", + (int)boot_size); + rc = -EINVAL; + goto err_release; + } + + /* Allocate ucode buffers for card's bus-master loading ... */ + + /* Runtime instructions and 2 copies of data: + * 1) unmodified from disk + * 2) backup cache for save/restore during power-downs */ + priv->ucode_code.len = inst_size; + priv->ucode_code.v_addr = + pci_alloc_consistent(priv->pci_dev, + priv->ucode_code.len, + &(priv->ucode_code.p_addr)); + + priv->ucode_data.len = data_size; + priv->ucode_data.v_addr = + pci_alloc_consistent(priv->pci_dev, + priv->ucode_data.len, + &(priv->ucode_data.p_addr)); + + priv->ucode_data_backup.len = data_size; + priv->ucode_data_backup.v_addr = + pci_alloc_consistent(priv->pci_dev, + priv->ucode_data_backup.len, + &(priv->ucode_data_backup.p_addr)); + + + /* Initialization instructions and data */ + priv->ucode_init.len = init_size; + priv->ucode_init.v_addr = + pci_alloc_consistent(priv->pci_dev, + priv->ucode_init.len, + &(priv->ucode_init.p_addr)); + + priv->ucode_init_data.len = init_data_size; + priv->ucode_init_data.v_addr = + pci_alloc_consistent(priv->pci_dev, + priv->ucode_init_data.len, + &(priv->ucode_init_data.p_addr)); + + /* Bootstrap (instructions only, no data) */ + priv->ucode_boot.len = boot_size; + priv->ucode_boot.v_addr = + pci_alloc_consistent(priv->pci_dev, + priv->ucode_boot.len, + &(priv->ucode_boot.p_addr)); + + if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr || + !priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr || + !priv->ucode_boot.v_addr || !priv->ucode_data_backup.v_addr) + goto err_pci_alloc; + + /* Copy images into buffers for card's bus-master reads ... */ + + /* Runtime instructions (first block of data in file) */ + src = &ucode->data[0]; + len = priv->ucode_code.len; + IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %d\n", + (int)len); + memcpy(priv->ucode_code.v_addr, src, len); + IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n", + priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr); + + /* Runtime data (2nd block) + * NOTE: Copy into backup buffer will be done in iwl_up() */ + src = &ucode->data[inst_size]; + len = priv->ucode_data.len; + IWL_DEBUG_INFO("Copying (but not loading) uCode data len %d\n", + (int)len); + memcpy(priv->ucode_data.v_addr, src, len); + memcpy(priv->ucode_data_backup.v_addr, src, len); + + /* Initialization instructions (3rd block) */ + if (init_size) { + src = &ucode->data[inst_size + data_size]; + len = priv->ucode_init.len; + IWL_DEBUG_INFO("Copying (but not loading) init instr len %d\n", + (int)len); + memcpy(priv->ucode_init.v_addr, src, len); + } + + /* Initialization data (4th block) */ + if (init_data_size) { + src = &ucode->data[inst_size + data_size + init_size]; + len = priv->ucode_init_data.len; + IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n", + (int)len); + memcpy(priv->ucode_init_data.v_addr, src, len); + } + + /* Bootstrap instructions (5th block) */ + src = &ucode->data[inst_size + data_size + init_size + init_data_size]; + len = priv->ucode_boot.len; + IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n", + (int)len); + memcpy(priv->ucode_boot.v_addr, src, len); + + /* We have our copies now, allow OS release its copies */ + release_firmware(ucode_raw); + return 0; + + err_pci_alloc: + IWL_ERROR("failed to allocate pci memory\n"); + rc = -ENOMEM; + iwl_dealloc_ucode_pci(priv); + + err_release: + release_firmware(ucode_raw); + + error: + return rc; +} + + +/** + * iwl_set_ucode_ptrs - Set uCode address location + * + * Tell initialization uCode where to find runtime uCode. + * + * BSM registers initially contain pointers to initialization uCode. + * We need to replace them to load runtime uCode inst and data, + * and to save runtime data when powering down. + */ +static int iwl_set_ucode_ptrs(struct iwl_priv *priv) +{ + dma_addr_t pinst; + dma_addr_t pdata; + int rc = 0; + unsigned long flags; + + /* bits 31:0 for 3945 */ + pinst = priv->ucode_code.p_addr; + pdata = priv->ucode_data_backup.p_addr; + + spin_lock_irqsave(&priv->lock, flags); + rc = iwl_grab_restricted_access(priv); + if (rc) { + spin_unlock_irqrestore(&priv->lock, flags); + return rc; + } + + /* Tell bootstrap uCode where to find image to load */ + iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst); + iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata); + iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG, + priv->ucode_data.len); + + /* Inst bytecount must be last to set up, bit 31 signals uCode + * that all new ptr/size info is in place */ + iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG, + priv->ucode_code.len | BSM_DRAM_INST_LOAD); + + iwl_release_restricted_access(priv); + + spin_unlock_irqrestore(&priv->lock, flags); + + IWL_DEBUG_INFO("Runtime uCode pointers are set.\n"); + + return rc; +} + +/** + * iwl_init_alive_start - Called after REPLY_ALIVE notification receieved + * + * Called after REPLY_ALIVE notification received from "initialize" uCode. + * + * The 4965 "initialize" ALIVE reply contains calibration data for: + * Voltage, temperature, and MIMO tx gain correction, now stored in priv + * (3945 does not contain this data). + * + * Tell "initialize" uCode to go ahead and load the runtime uCode. +*/ +static void iwl_init_alive_start(struct iwl_priv *priv) +{ + /* Check alive response for "valid" sign from uCode */ + if (priv->card_alive_init.is_valid != UCODE_VALID_OK) { + /* We had an error bringing up the hardware, so take it + * all the way back down so we can try again */ + IWL_DEBUG_INFO("Initialize Alive failed.\n"); + goto restart; + } + + /* Bootstrap uCode has loaded initialize uCode ... verify inst image. + * This is a paranoid check, because we would not have gotten the + * "initialize" alive if code weren't properly loaded. */ + if (iwl_verify_ucode(priv)) { + /* Runtime instruction load was bad; + * take it all the way back down so we can try again */ + IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n"); + goto restart; + } + + /* Send pointers to protocol/runtime uCode image ... init code will + * load and launch runtime uCode, which will send us another "Alive" + * notification. */ + IWL_DEBUG_INFO("Initialization Alive received.\n"); + if (iwl_set_ucode_ptrs(priv)) { + /* Runtime instruction load won't happen; + * take it all the way back down so we can try again */ + IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n"); + goto restart; + } + return; + + restart: + queue_work(priv->workqueue, &priv->restart); +} + + +/** + * iwl_alive_start - called after REPLY_ALIVE notification received + * from protocol/runtime uCode (initialization uCode's + * Alive gets handled by iwl_init_alive_start()). + */ +static void iwl_alive_start(struct iwl_priv *priv) +{ + int rc = 0; + int thermal_spin = 0; + u32 rfkill; + + IWL_DEBUG_INFO("Runtime Alive received.\n"); + + if (priv->card_alive.is_valid != UCODE_VALID_OK) { + /* We had an error bringing up the hardware, so take it + * all the way back down so we can try again */ + IWL_DEBUG_INFO("Alive failed.\n"); + goto restart; + } + + /* Initialize uCode has loaded Runtime uCode ... verify inst image. + * This is a paranoid check, because we would not have gotten the + * "runtime" alive if code weren't properly loaded. */ + if (iwl_verify_ucode(priv)) { + /* Runtime instruction load was bad; + * take it all the way back down so we can try again */ + IWL_DEBUG_INFO("Bad runtime uCode load.\n"); + goto restart; + } + + iwl_clear_stations_table(priv); + + rc = iwl_grab_restricted_access(priv); + if (rc) { + IWL_WARNING("Can not read rfkill status from adapter\n"); + return; + } + + rfkill = iwl_read_restricted_reg(priv, APMG_RFKILL_REG); + IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill); + iwl_release_restricted_access(priv); + + if (rfkill & 0x1) { + clear_bit(STATUS_RF_KILL_HW, &priv->status); + /* if rfkill is not on, then wait for thermal + * sensor in adapter to kick in */ + while (iwl_hw_get_temperature(priv) == 0) { + thermal_spin++; + udelay(10); + } + + if (thermal_spin) + IWL_DEBUG_INFO("Thermal calibration took %dus\n", + thermal_spin * 10); + } else + set_bit(STATUS_RF_KILL_HW, &priv->status); + + /* After the ALIVE response, we can process host commands */ + set_bit(STATUS_ALIVE, &priv->status); + + /* Clear out the uCode error bit if it is set */ + clear_bit(STATUS_FW_ERROR, &priv->status); + + rc = iwl_init_channel_map(priv); + if (rc) { + IWL_ERROR("initializing regulatory failed: %d\n", rc); + return; + } + + iwl_init_geos(priv); + + if (iwl_is_rfkill(priv)) + return; + + if (!priv->mac80211_registered) { + /* Unlock so any user space entry points can call back into + * the driver without a deadlock... */ + mutex_unlock(&priv->mutex); + iwl_rate_control_register(priv->hw); + rc = ieee80211_register_hw(priv->hw); + priv->hw->conf.beacon_int = 100; + mutex_lock(&priv->mutex); + + if (rc) { + IWL_ERROR("Failed to register network " + "device (error %d)\n", rc); + return; + } + + priv->mac80211_registered = 1; + + iwl_reset_channel_flag(priv); + } else + ieee80211_start_queues(priv->hw); + + priv->active_rate = priv->rates_mask; + priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK; + + iwl_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode)); + + if (iwl_is_associated(priv)) { + struct iwl_rxon_cmd *active_rxon = + (struct iwl_rxon_cmd *)(&priv->active_rxon); + + memcpy(&priv->staging_rxon, &priv->active_rxon, + sizeof(priv->staging_rxon)); + active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK; + } else { + /* Initialize our rx_config data */ + iwl_connection_init_rx_config(priv); + memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN); + } + + /* Configure BT coexistence */ + iwl_send_bt_config(priv); + + /* Configure the adapter for unassociated operation */ + iwl_commit_rxon(priv); + + /* At this point, the NIC is initialized and operational */ + priv->notif_missed_beacons = 0; + set_bit(STATUS_READY, &priv->status); + + iwl3945_reg_txpower_periodic(priv); + + IWL_DEBUG_INFO("ALIVE processing complete.\n"); + + if (priv->error_recovering) + iwl_error_recovery(priv); + + return; + + restart: + queue_work(priv->workqueue, &priv->restart); +} + +static void iwl_cancel_deferred_work(struct iwl_priv *priv); + +static void __iwl_down(struct iwl_priv *priv) +{ + unsigned long flags; + int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status); + struct ieee80211_conf *conf = NULL; + + IWL_DEBUG_INFO(DRV_NAME " is going down\n"); + + conf = ieee80211_get_hw_conf(priv->hw); + + if (!exit_pending) + set_bit(STATUS_EXIT_PENDING, &priv->status); + + iwl_clear_stations_table(priv); + + /* Unblock any waiting calls */ + wake_up_interruptible_all(&priv->wait_command_queue); + + iwl_cancel_deferred_work(priv); + + /* Wipe out the EXIT_PENDING status bit if we are not actually + * exiting the module */ + if (!exit_pending) + clear_bit(STATUS_EXIT_PENDING, &priv->status); + + /* stop and reset the on-board processor */ + iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET); + + /* tell the device to stop sending interrupts */ + iwl_disable_interrupts(priv); + + if (priv->mac80211_registered) + ieee80211_stop_queues(priv->hw); + + /* If we have not previously called iwl_init() then + * clear all bits but the RF Kill and SUSPEND bits and return */ + if (!iwl_is_init(priv)) { + priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) << + STATUS_RF_KILL_HW | + test_bit(STATUS_RF_KILL_SW, &priv->status) << + STATUS_RF_KILL_SW | + test_bit(STATUS_IN_SUSPEND, &priv->status) << + STATUS_IN_SUSPEND; + goto exit; + } + + /* ...otherwise clear out all the status bits but the RF Kill and + * SUSPEND bits and continue taking the NIC down. */ + priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) << + STATUS_RF_KILL_HW | + test_bit(STATUS_RF_KILL_SW, &priv->status) << + STATUS_RF_KILL_SW | + test_bit(STATUS_IN_SUSPEND, &priv->status) << + STATUS_IN_SUSPEND | + test_bit(STATUS_FW_ERROR, &priv->status) << + STATUS_FW_ERROR; + + spin_lock_irqsave(&priv->lock, flags); + iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); + spin_unlock_irqrestore(&priv->lock, flags); + + iwl_hw_txq_ctx_stop(priv); + iwl_hw_rxq_stop(priv); + + spin_lock_irqsave(&priv->lock, flags); + if (!iwl_grab_restricted_access(priv)) { + iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG, + APMG_CLK_VAL_DMA_CLK_RQT); + iwl_release_restricted_access(priv); + } + spin_unlock_irqrestore(&priv->lock, flags); + + udelay(5); + + iwl_hw_nic_stop_master(priv); + iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET); + iwl_hw_nic_reset(priv); + + exit: + memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp)); + + if (priv->ibss_beacon) + dev_kfree_skb(priv->ibss_beacon); + priv->ibss_beacon = NULL; + + /* clear out any free frames */ + iwl_clear_free_frames(priv); +} + +static void iwl_down(struct iwl_priv *priv) +{ + mutex_lock(&priv->mutex); + __iwl_down(priv); + mutex_unlock(&priv->mutex); +} + +#define MAX_HW_RESTARTS 5 + +static int __iwl_up(struct iwl_priv *priv) +{ + DECLARE_MAC_BUF(mac); + int rc, i; + + if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { + IWL_WARNING("Exit pending; will not bring the NIC up\n"); + return -EIO; + } + + if (test_bit(STATUS_RF_KILL_SW, &priv->status)) { + IWL_WARNING("Radio disabled by SW RF kill (module " + "parameter)\n"); + return 0; + } + + iwl_write32(priv, CSR_INT, 0xFFFFFFFF); + + rc = iwl_hw_nic_init(priv); + if (rc) { + IWL_ERROR("Unable to int nic\n"); + return rc; + } + + /* make sure rfkill handshake bits are cleared */ + iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); + iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, + CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); + + /* clear (again), then enable host interrupts */ + iwl_write32(priv, CSR_INT, 0xFFFFFFFF); + iwl_enable_interrupts(priv); + + /* really make sure rfkill handshake bits are cleared */ + iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); + iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); + + /* Copy original ucode data image from disk into backup cache. + * This will be used to initialize the on-board processor's + * data SRAM for a clean start when the runtime program first loads. */ + memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr, + priv->ucode_data.len); + + for (i = 0; i < MAX_HW_RESTARTS; i++) { + + iwl_clear_stations_table(priv); + + /* load bootstrap state machine, + * load bootstrap program into processor's memory, + * prepare to load the "initialize" uCode */ + rc = iwl_load_bsm(priv); + + if (rc) { + IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc); + continue; + } + + /* start card; "initialize" will load runtime ucode */ + iwl_nic_start(priv); + + /* MAC Address location in EEPROM same for 3945/4965 */ + get_eeprom_mac(priv, priv->mac_addr); + IWL_DEBUG_INFO("MAC address: %s\n", + print_mac(mac, priv->mac_addr)); + + SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr); + + IWL_DEBUG_INFO(DRV_NAME " is coming up\n"); + + return 0; + } + + set_bit(STATUS_EXIT_PENDING, &priv->status); + __iwl_down(priv); + + /* tried to restart and config the device for as long as our + * patience could withstand */ + IWL_ERROR("Unable to initialize device after %d attempts.\n", i); + return -EIO; +} + + +/***************************************************************************** + * + * Workqueue callbacks + * + *****************************************************************************/ + +static void iwl_bg_init_alive_start(struct work_struct *data) +{ + struct iwl_priv *priv = + container_of(data, struct iwl_priv, init_alive_start.work); + + if (test_bit(STATUS_EXIT_PENDING, &priv->status)) + return; + + mutex_lock(&priv->mutex); + iwl_init_alive_start(priv); + mutex_unlock(&priv->mutex); +} + +static void iwl_bg_alive_start(struct work_struct *data) +{ + struct iwl_priv *priv = + container_of(data, struct iwl_priv, alive_start.work); + + if (test_bit(STATUS_EXIT_PENDING, &priv->status)) + return; + + mutex_lock(&priv->mutex); + iwl_alive_start(priv); + mutex_unlock(&priv->mutex); +} + +static void iwl_bg_rf_kill(struct work_struct *work) +{ + struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill); + + wake_up_interruptible(&priv->wait_command_queue); + + if (test_bit(STATUS_EXIT_PENDING, &priv->status)) + return; + + mutex_lock(&priv->mutex); + + if (!iwl_is_rfkill(priv)) { + IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL, + "HW and/or SW RF Kill no longer active, restarting " + "device\n"); + if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) + queue_work(priv->workqueue, &priv->restart); + } else { + + if (!test_bit(STATUS_RF_KILL_HW, &priv->status)) + IWL_DEBUG_RF_KILL("Can not turn radio back on - " + "disabled by SW switch\n"); + else + IWL_WARNING("Radio Frequency Kill Switch is On:\n" + "Kill switch must be turned off for " + "wireless networking to work.\n"); + } + mutex_unlock(&priv->mutex); +} + +#define IWL_SCAN_CHECK_WATCHDOG (7 * HZ) + +static void iwl_bg_scan_check(struct work_struct *data) +{ + struct iwl_priv *priv = + container_of(data, struct iwl_priv, scan_check.work); + + if (test_bit(STATUS_EXIT_PENDING, &priv->status)) + return; + + mutex_lock(&priv->mutex); + if (test_bit(STATUS_SCANNING, &priv->status) || + test_bit(STATUS_SCAN_ABORTING, &priv->status)) { + IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, + "Scan completion watchdog resetting adapter (%dms)\n", + jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG)); + if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) + queue_work(priv->workqueue, &priv->restart); + } + mutex_unlock(&priv->mutex); +} + +static void iwl_bg_request_scan(struct work_struct *data) +{ + struct iwl_priv *priv = + container_of(data, struct iwl_priv, request_scan); + struct iwl_host_cmd cmd = { + .id = REPLY_SCAN_CMD, + .len = sizeof(struct iwl_scan_cmd), + .meta.flags = CMD_SIZE_HUGE, + }; + int rc = 0; + struct iwl_scan_cmd *scan; + struct ieee80211_conf *conf = NULL; + u8 direct_mask; + int phymode; + + conf = ieee80211_get_hw_conf(priv->hw); + + mutex_lock(&priv->mutex); + + if (!iwl_is_ready(priv)) { + IWL_WARNING("request scan called when driver not ready.\n"); + goto done; + } + + /* Make sure the scan wasn't cancelled before this queued work + * was given the chance to run... */ + if (!test_bit(STATUS_SCANNING, &priv->status)) + goto done; + + /* This should never be called or scheduled if there is currently + * a scan active in the hardware. */ + if (test_bit(STATUS_SCAN_HW, &priv->status)) { + IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. " + "Ignoring second request.\n"); + rc = -EIO; + goto done; + } + + if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { + IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n"); + goto done; + } + + if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) { + IWL_DEBUG_HC("Scan request while abort pending. Queuing.\n"); + goto done; + } + + if (iwl_is_rfkill(priv)) { + IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n"); + goto done; + } + + if (!test_bit(STATUS_READY, &priv->status)) { + IWL_DEBUG_HC("Scan request while uninitialized. Queuing.\n"); + goto done; + } + + if (!priv->scan_bands) { + IWL_DEBUG_HC("Aborting scan due to no requested bands\n"); + goto done; + } + + if (!priv->scan) { + priv->scan = kmalloc(sizeof(struct iwl_scan_cmd) + + IWL_MAX_SCAN_SIZE, GFP_KERNEL); + if (!priv->scan) { + rc = -ENOMEM; + goto done; + } + } + scan = priv->scan; + memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE); + + scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH; + scan->quiet_time = IWL_ACTIVE_QUIET_TIME; + + if (iwl_is_associated(priv)) { + u16 interval = 0; + u32 extra; + u32 suspend_time = 100; + u32 scan_suspend_time = 100; + unsigned long flags; + + IWL_DEBUG_INFO("Scanning while associated...\n"); + + spin_lock_irqsave(&priv->lock, flags); + interval = priv->beacon_int; + spin_unlock_irqrestore(&priv->lock, flags); + + scan->suspend_time = 0; + scan->max_out_time = cpu_to_le32(600 * 1024); + if (!interval) + interval = suspend_time; + /* + * suspend time format: + * 0-19: beacon interval in usec (time before exec.) + * 20-23: 0 + * 24-31: number of beacons (suspend between channels) + */ + + extra = (suspend_time / interval) << 24; + scan_suspend_time = 0xFF0FFFFF & + (extra | ((suspend_time % interval) * 1024)); + + scan->suspend_time = cpu_to_le32(scan_suspend_time); + IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n", + scan_suspend_time, interval); + } + + /* We should add the ability for user to lock to PASSIVE ONLY */ + if (priv->one_direct_scan) { + IWL_DEBUG_SCAN + ("Kicking off one direct scan for '%s'\n", + iwl_escape_essid(priv->direct_ssid, + priv->direct_ssid_len)); + scan->direct_scan[0].id = WLAN_EID_SSID; + scan->direct_scan[0].len = priv->direct_ssid_len; + memcpy(scan->direct_scan[0].ssid, + priv->direct_ssid, priv->direct_ssid_len); + direct_mask = 1; + } else if (!iwl_is_associated(priv)) { + scan->direct_scan[0].id = WLAN_EID_SSID; + scan->direct_scan[0].len = priv->essid_len; + memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len); + direct_mask = 1; + } else + direct_mask = 0; + + /* We don't build a direct scan probe request; the uCode will do + * that based on the direct_mask added to each channel entry */ + scan->tx_cmd.len = cpu_to_le16( + iwl_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data, + IWL_MAX_SCAN_SIZE - sizeof(scan), 0)); + scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK; + scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id; + scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; + + /* flags + rate selection */ + + switch (priv->scan_bands) { + case 2: + scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK; + scan->tx_cmd.rate = IWL_RATE_1M_PLCP; + scan->good_CRC_th = 0; + phymode = MODE_IEEE80211G; + break; + + case 1: + scan->tx_cmd.rate = IWL_RATE_6M_PLCP; + scan->good_CRC_th = IWL_GOOD_CRC_TH; + phymode = MODE_IEEE80211A; + break; + + default: + IWL_WARNING("Invalid scan band count\n"); + goto done; + } + + /* select Rx antennas */ + scan->flags |= iwl3945_get_antenna_flags(priv); + + if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) + scan->filter_flags = RXON_FILTER_PROMISC_MSK; + + if (direct_mask) + IWL_DEBUG_SCAN + ("Initiating direct scan for %s.\n", + iwl_escape_essid(priv->essid, priv->essid_len)); + else + IWL_DEBUG_SCAN("Initiating indirect scan.\n"); + + scan->channel_count = + iwl_get_channels_for_scan( + priv, phymode, 1, /* active */ + direct_mask, + (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]); + + cmd.len += le16_to_cpu(scan->tx_cmd.len) + + scan->channel_count * sizeof(struct iwl_scan_channel); + cmd.data = scan; + scan->len = cpu_to_le16(cmd.len); + + set_bit(STATUS_SCAN_HW, &priv->status); + rc = iwl_send_cmd_sync(priv, &cmd); + if (rc) + goto done; + + queue_delayed_work(priv->workqueue, &priv->scan_check, + IWL_SCAN_CHECK_WATCHDOG); + + mutex_unlock(&priv->mutex); + return; + + done: + /* inform mac80211 sacn aborted */ + queue_work(priv->workqueue, &priv->scan_completed); + mutex_unlock(&priv->mutex); +} + +static void iwl_bg_up(struct work_struct *data) +{ + struct iwl_priv *priv = container_of(data, struct iwl_priv, up); + + if (test_bit(STATUS_EXIT_PENDING, &priv->status)) + return; + + mutex_lock(&priv->mutex); + __iwl_up(priv); + mutex_unlock(&priv->mutex); +} + +static void iwl_bg_restart(struct work_struct *data) +{ + struct iwl_priv *priv = container_of(data, struct iwl_priv, restart); + + if (test_bit(STATUS_EXIT_PENDING, &priv->status)) + return; + + iwl_down(priv); + queue_work(priv->workqueue, &priv->up); +} + +static void iwl_bg_rx_replenish(struct work_struct *data) +{ + struct iwl_priv *priv = + container_of(data, struct iwl_priv, rx_replenish); + + if (test_bit(STATUS_EXIT_PENDING, &priv->status)) + return; + + mutex_lock(&priv->mutex); + iwl_rx_replenish(priv); + mutex_unlock(&priv->mutex); +} + +static void iwl_bg_post_associate(struct work_struct *data) +{ + struct iwl_priv *priv = container_of(data, struct iwl_priv, + post_associate.work); + + int rc = 0; + struct ieee80211_conf *conf = NULL; + DECLARE_MAC_BUF(mac); + + if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { + IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__); + return; + } + + + IWL_DEBUG_ASSOC("Associated as %d to: %s\n", + priv->assoc_id, + print_mac(mac, priv->active_rxon.bssid_addr)); + + if (test_bit(STATUS_EXIT_PENDING, &priv->status)) + return; + + mutex_lock(&priv->mutex); + + conf = ieee80211_get_hw_conf(priv->hw); + + priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK; + iwl_commit_rxon(priv); + + memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd)); + iwl_setup_rxon_timing(priv); + rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING, + sizeof(priv->rxon_timing), &priv->rxon_timing); + if (rc) + IWL_WARNING("REPLY_RXON_TIMING failed - " + "Attempting to continue.\n"); + + priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK; + + priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id); + + IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n", + priv->assoc_id, priv->beacon_int); + + if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE) + priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK; + else + priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK; + + if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) { + if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) + priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK; + else + priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK; + + if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) + priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK; + + } + + iwl_commit_rxon(priv); + + switch (priv->iw_mode) { + case IEEE80211_IF_TYPE_STA: + iwl_rate_scale_init(priv->hw, IWL_AP_ID); + break; + + case IEEE80211_IF_TYPE_IBSS: + + /* clear out the station table */ + iwl_clear_stations_table(priv); + + iwl_add_station(priv, BROADCAST_ADDR, 0, 0); + iwl_add_station(priv, priv->bssid, 0, 0); + iwl3945_sync_sta(priv, IWL_STA_ID, + (priv->phymode == MODE_IEEE80211A)? + IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP, + CMD_ASYNC); + iwl_rate_scale_init(priv->hw, IWL_STA_ID); + iwl_send_beacon_cmd(priv); + + break; + + default: + IWL_ERROR("%s Should not be called in %d mode\n", + __FUNCTION__, priv->iw_mode); + break; + } + + iwl_sequence_reset(priv); + +#ifdef CONFIG_IWLWIFI_QOS + iwl_activate_qos(priv, 0); +#endif /* CONFIG_IWLWIFI_QOS */ + mutex_unlock(&priv->mutex); +} + +static void iwl_bg_abort_scan(struct work_struct *work) +{ + struct iwl_priv *priv = container_of(work, struct iwl_priv, + abort_scan); + + if (!iwl_is_ready(priv)) + return; + + mutex_lock(&priv->mutex); + + set_bit(STATUS_SCAN_ABORTING, &priv->status); + iwl_send_scan_abort(priv); + + mutex_unlock(&priv->mutex); +} + +static void iwl_bg_scan_completed(struct work_struct *work) +{ + struct iwl_priv *priv = + container_of(work, struct iwl_priv, scan_completed); + + IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n"); + + if (test_bit(STATUS_EXIT_PENDING, &priv->status)) + return; + + ieee80211_scan_completed(priv->hw); + + /* Since setting the TXPOWER may have been deferred while + * performing the scan, fire one off */ + mutex_lock(&priv->mutex); + iwl_hw_reg_send_txpower(priv); + mutex_unlock(&priv->mutex); +} + +/***************************************************************************** + * + * mac80211 entry point functions + * + *****************************************************************************/ + +static int iwl_mac_start(struct ieee80211_hw *hw) +{ + struct iwl_priv *priv = hw->priv; + + IWL_DEBUG_MAC80211("enter\n"); + + /* we should be verifying the device is ready to be opened */ + mutex_lock(&priv->mutex); + + priv->is_open = 1; + + if (!iwl_is_rfkill(priv)) + ieee80211_start_queues(priv->hw); + + mutex_unlock(&priv->mutex); + IWL_DEBUG_MAC80211("leave\n"); + return 0; +} + +static void iwl_mac_stop(struct ieee80211_hw *hw) +{ + struct iwl_priv *priv = hw->priv; + + IWL_DEBUG_MAC80211("enter\n"); + priv->is_open = 0; + /*netif_stop_queue(dev); */ + flush_workqueue(priv->workqueue); + IWL_DEBUG_MAC80211("leave\n"); +} + +static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb, + struct ieee80211_tx_control *ctl) +{ + struct iwl_priv *priv = hw->priv; + + IWL_DEBUG_MAC80211("enter\n"); + + if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) { + IWL_DEBUG_MAC80211("leave - monitor\n"); + return -1; + } + + IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len, + ctl->tx_rate); + + if (iwl_tx_skb(priv, skb, ctl)) + dev_kfree_skb_any(skb); + + IWL_DEBUG_MAC80211("leave\n"); + return 0; +} + +static int iwl_mac_add_interface(struct ieee80211_hw *hw, + struct ieee80211_if_init_conf *conf) +{ + struct iwl_priv *priv = hw->priv; + unsigned long flags; + DECLARE_MAC_BUF(mac); + + IWL_DEBUG_MAC80211("enter: id %d, type %d\n", conf->if_id, conf->type); + if (conf->mac_addr) + IWL_DEBUG_MAC80211("enter: MAC %s\n", + print_mac(mac, conf->mac_addr)); + + if (priv->interface_id) { + IWL_DEBUG_MAC80211("leave - interface_id != 0\n"); + return 0; + } + + spin_lock_irqsave(&priv->lock, flags); + priv->interface_id = conf->if_id; + + spin_unlock_irqrestore(&priv->lock, flags); + + mutex_lock(&priv->mutex); + iwl_set_mode(priv, conf->type); + + IWL_DEBUG_MAC80211("leave\n"); + mutex_unlock(&priv->mutex); + + return 0; +} + +/** + * iwl_mac_config - mac80211 config callback + * + * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to + * be set inappropriately and the driver currently sets the hardware up to + * use it whenever needed. + */ +static int iwl_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf) +{ + struct iwl_priv *priv = hw->priv; + const struct iwl_channel_info *ch_info; + unsigned long flags; + + mutex_lock(&priv->mutex); + IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel); + + if (!iwl_is_ready(priv)) { + IWL_DEBUG_MAC80211("leave - not ready\n"); + mutex_unlock(&priv->mutex); + return -EIO; + } + + /* TODO: Figure out how to get ieee80211_local->sta_scanning w/ only + * what is exposed through include/ declrations */ + if (unlikely(!iwl_param_disable_hw_scan && + test_bit(STATUS_SCANNING, &priv->status))) { + IWL_DEBUG_MAC80211("leave - scanning\n"); + mutex_unlock(&priv->mutex); + return 0; + } + + spin_lock_irqsave(&priv->lock, flags); + + ch_info = iwl_get_channel_info(priv, conf->phymode, conf->channel); + if (!is_channel_valid(ch_info)) { + IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n", + conf->channel, conf->phymode); + IWL_DEBUG_MAC80211("leave - invalid channel\n"); + spin_unlock_irqrestore(&priv->lock, flags); + mutex_unlock(&priv->mutex); + return -EINVAL; + } + + iwl_set_rxon_channel(priv, conf->phymode, conf->channel); + + iwl_set_flags_for_phymode(priv, conf->phymode); + + /* The list of supported rates and rate mask can be different + * for each phymode; since the phymode may have changed, reset + * the rate mask to what mac80211 lists */ + iwl_set_rate(priv); + + spin_unlock_irqrestore(&priv->lock, flags); + +#ifdef IEEE80211_CONF_CHANNEL_SWITCH + if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) { + iwl_hw_channel_switch(priv, conf->channel); + mutex_unlock(&priv->mutex); + return 0; + } +#endif + + iwl_radio_kill_sw(priv, !conf->radio_enabled); + + if (!conf->radio_enabled) { + IWL_DEBUG_MAC80211("leave - radio disabled\n"); + mutex_unlock(&priv->mutex); + return 0; + } + + if (iwl_is_rfkill(priv)) { + IWL_DEBUG_MAC80211("leave - RF kill\n"); + mutex_unlock(&priv->mutex); + return -EIO; + } + + iwl_set_rate(priv); + + if (memcmp(&priv->active_rxon, + &priv->staging_rxon, sizeof(priv->staging_rxon))) + iwl_commit_rxon(priv); + else + IWL_DEBUG_INFO("No re-sending same RXON configuration.\n"); + + IWL_DEBUG_MAC80211("leave\n"); + + mutex_unlock(&priv->mutex); + + return 0; +} + +static void iwl_config_ap(struct iwl_priv *priv) +{ + int rc = 0; + + if (priv->status & STATUS_EXIT_PENDING) + return; + + /* The following should be done only at AP bring up */ + if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) { + + /* RXON - unassoc (to set timing command) */ + priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK; + iwl_commit_rxon(priv); + + /* RXON Timing */ + memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd)); + iwl_setup_rxon_timing(priv); + rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING, + sizeof(priv->rxon_timing), &priv->rxon_timing); + if (rc) + IWL_WARNING("REPLY_RXON_TIMING failed - " + "Attempting to continue.\n"); + + /* FIXME: what should be the assoc_id for AP? */ + priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id); + if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE) + priv->staging_rxon.flags |= + RXON_FLG_SHORT_PREAMBLE_MSK; + else + priv->staging_rxon.flags &= + ~RXON_FLG_SHORT_PREAMBLE_MSK; + + if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) { + if (priv->assoc_capability & + WLAN_CAPABILITY_SHORT_SLOT_TIME) + priv->staging_rxon.flags |= + RXON_FLG_SHORT_SLOT_MSK; + else + priv->staging_rxon.flags &= + ~RXON_FLG_SHORT_SLOT_MSK; + + if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) + priv->staging_rxon.flags &= + ~RXON_FLG_SHORT_SLOT_MSK; + } + /* restore RXON assoc */ + priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK; + iwl_commit_rxon(priv); + iwl_add_station(priv, BROADCAST_ADDR, 0, 0); + } + iwl_send_beacon_cmd(priv); + + /* FIXME - we need to add code here to detect a totally new + * configuration, reset the AP, unassoc, rxon timing, assoc, + * clear sta table, add BCAST sta... */ +} + +static int iwl_mac_config_interface(struct ieee80211_hw *hw, int if_id, + struct ieee80211_if_conf *conf) +{ + struct iwl_priv *priv = hw->priv; + DECLARE_MAC_BUF(mac); + unsigned long flags; + int rc; + + if (conf == NULL) + return -EIO; + + /* XXX: this MUST use conf->mac_addr */ + + if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) && + (!conf->beacon || !conf->ssid_len)) { + IWL_DEBUG_MAC80211 + ("Leaving in AP mode because HostAPD is not ready.\n"); + return 0; + } + + mutex_lock(&priv->mutex); + + IWL_DEBUG_MAC80211("enter: interface id %d\n", if_id); + if (conf->bssid) + IWL_DEBUG_MAC80211("bssid: %s\n", + print_mac(mac, conf->bssid)); + +/* + * very dubious code was here; the probe filtering flag is never set: + * + if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) && + !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) { + */ + if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) { + IWL_DEBUG_MAC80211("leave - scanning\n"); + mutex_unlock(&priv->mutex); + return 0; + } + + if (priv->interface_id != if_id) { + IWL_DEBUG_MAC80211("leave - interface_id != if_id\n"); + mutex_unlock(&priv->mutex); + return 0; + } + + if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { + if (!conf->bssid) { + conf->bssid = priv->mac_addr; + memcpy(priv->bssid, priv->mac_addr, ETH_ALEN); + IWL_DEBUG_MAC80211("bssid was set to: %s\n", + print_mac(mac, conf->bssid)); + } + if (priv->ibss_beacon) + dev_kfree_skb(priv->ibss_beacon); + + priv->ibss_beacon = conf->beacon; + } + + if (conf->bssid && !is_zero_ether_addr(conf->bssid) && + !is_multicast_ether_addr(conf->bssid)) { + /* If there is currently a HW scan going on in the background + * then we need to cancel it else the RXON below will fail. */ + if (iwl_scan_cancel_timeout(priv, 100)) { + IWL_WARNING("Aborted scan still in progress " + "after 100ms\n"); + IWL_DEBUG_MAC80211("leaving - scan abort failed.\n"); + mutex_unlock(&priv->mutex); + return -EAGAIN; + } + memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN); + + /* TODO: Audit driver for usage of these members and see + * if mac80211 deprecates them (priv->bssid looks like it + * shouldn't be there, but I haven't scanned the IBSS code + * to verify) - jpk */ + memcpy(priv->bssid, conf->bssid, ETH_ALEN); + + if (priv->iw_mode == IEEE80211_IF_TYPE_AP) + iwl_config_ap(priv); + else { + priv->staging_rxon.filter_flags |= + RXON_FILTER_ASSOC_MSK; + rc = iwl_commit_rxon(priv); + if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc) + iwl_add_station(priv, + priv->active_rxon.bssid_addr, 1, 0); + } + + } else { + priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK; + iwl_commit_rxon(priv); + } + + spin_lock_irqsave(&priv->lock, flags); + if (!conf->ssid_len) + memset(priv->essid, 0, IW_ESSID_MAX_SIZE); + else + memcpy(priv->essid, conf->ssid, conf->ssid_len); + + priv->essid_len = conf->ssid_len; + spin_unlock_irqrestore(&priv->lock, flags); + + IWL_DEBUG_MAC80211("leave\n"); + mutex_unlock(&priv->mutex); + + return 0; +} + +static void iwl_configure_filter(struct ieee80211_hw *hw, + unsigned int changed_flags, + unsigned int *total_flags, + int mc_count, struct dev_addr_list *mc_list) +{ + /* + * XXX: dummy + * see also iwl_connection_init_rx_config + */ + *total_flags = 0; +} + +static void iwl_mac_remove_interface(struct ieee80211_hw *hw, + struct ieee80211_if_init_conf *conf) +{ + struct iwl_priv *priv = hw->priv; + + IWL_DEBUG_MAC80211("enter\n"); + + mutex_lock(&priv->mutex); + if (priv->interface_id == conf->if_id) { + priv->interface_id = 0; + memset(priv->bssid, 0, ETH_ALEN); + memset(priv->essid, 0, IW_ESSID_MAX_SIZE); + priv->essid_len = 0; + } + mutex_unlock(&priv->mutex); + + IWL_DEBUG_MAC80211("leave\n"); + +} + +#define IWL_DELAY_NEXT_SCAN (HZ*2) +static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len) +{ + int rc = 0; + unsigned long flags; + struct iwl_priv *priv = hw->priv; + + IWL_DEBUG_MAC80211("enter\n"); + + spin_lock_irqsave(&priv->lock, flags); + + if (!iwl_is_ready_rf(priv)) { + rc = -EIO; + IWL_DEBUG_MAC80211("leave - not ready or exit pending\n"); + goto out_unlock; + } + + if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { /* APs don't scan */ + rc = -EIO; + IWL_ERROR("ERROR: APs don't scan\n"); + goto out_unlock; + } + + /* if we just finished scan ask for delay */ + if (priv->last_scan_jiffies && + time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN, + jiffies)) { + rc = -EAGAIN; + goto out_unlock; + } + if (len) { + IWL_DEBUG_SCAN("direct scan for " + "%s [%d]\n ", + iwl_escape_essid(ssid, len), (int)len); + + priv->one_direct_scan = 1; + priv->direct_ssid_len = (u8) + min((u8) len, (u8) IW_ESSID_MAX_SIZE); + memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len); + } + + rc = iwl_scan_initiate(priv); + + IWL_DEBUG_MAC80211("leave\n"); + +out_unlock: + spin_unlock_irqrestore(&priv->lock, flags); + + return rc; +} + +static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, + const u8 *local_addr, const u8 *addr, + struct ieee80211_key_conf *key) +{ + struct iwl_priv *priv = hw->priv; + int rc = 0; + u8 sta_id; + + IWL_DEBUG_MAC80211("enter\n"); + + if (!iwl_param_hwcrypto) { + IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n"); + return -EOPNOTSUPP; + } + + if (is_zero_ether_addr(addr)) + /* only support pairwise keys */ + return -EOPNOTSUPP; + + sta_id = iwl_hw_find_station(priv, addr); + if (sta_id == IWL_INVALID_STATION) { + DECLARE_MAC_BUF(mac); + + IWL_DEBUG_MAC80211("leave - %s not in station map.\n", + print_mac(mac, addr)); + return -EINVAL; + } + + mutex_lock(&priv->mutex); + + switch (cmd) { + case SET_KEY: + rc = iwl_update_sta_key_info(priv, key, sta_id); + if (!rc) { + iwl_set_rxon_hwcrypto(priv, 1); + iwl_commit_rxon(priv); + key->hw_key_idx = sta_id; + IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n"); + key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; + } + break; + case DISABLE_KEY: + rc = iwl_clear_sta_key_info(priv, sta_id); + if (!rc) { + iwl_set_rxon_hwcrypto(priv, 0); + iwl_commit_rxon(priv); + IWL_DEBUG_MAC80211("disable hwcrypto key\n"); + } + break; + default: + rc = -EINVAL; + } + + IWL_DEBUG_MAC80211("leave\n"); + mutex_unlock(&priv->mutex); + + return rc; +} + +static int iwl_mac_conf_tx(struct ieee80211_hw *hw, int queue, + const struct ieee80211_tx_queue_params *params) +{ + struct iwl_priv *priv = hw->priv; +#ifdef CONFIG_IWLWIFI_QOS + unsigned long flags; + int q; +#endif /* CONFIG_IWL_QOS */ + + IWL_DEBUG_MAC80211("enter\n"); + + if (!iwl_is_ready_rf(priv)) { + IWL_DEBUG_MAC80211("leave - RF not ready\n"); + return -EIO; + } + + if (queue >= AC_NUM) { + IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue); + return 0; + } + +#ifdef CONFIG_IWLWIFI_QOS + if (!priv->qos_data.qos_enable) { + priv->qos_data.qos_active = 0; + IWL_DEBUG_MAC80211("leave - qos not enabled\n"); + return 0; + } + q = AC_NUM - 1 - queue; + + spin_lock_irqsave(&priv->lock, flags); + + priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min); + priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max); + priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs; + priv->qos_data.def_qos_parm.ac[q].edca_txop = + cpu_to_le16((params->burst_time * 100)); + + priv->qos_data.def_qos_parm.ac[q].reserved1 = 0; + priv->qos_data.qos_active = 1; + + spin_unlock_irqrestore(&priv->lock, flags); + + mutex_lock(&priv->mutex); + if (priv->iw_mode == IEEE80211_IF_TYPE_AP) + iwl_activate_qos(priv, 1); + else if (priv->assoc_id && iwl_is_associated(priv)) + iwl_activate_qos(priv, 0); + + mutex_unlock(&priv->mutex); + +#endif /*CONFIG_IWLWIFI_QOS */ + + IWL_DEBUG_MAC80211("leave\n"); + return 0; +} + +static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw, + struct ieee80211_tx_queue_stats *stats) +{ + struct iwl_priv *priv = hw->priv; + int i, avail; + struct iwl_tx_queue *txq; + struct iwl_queue *q; + unsigned long flags; + + IWL_DEBUG_MAC80211("enter\n"); + + if (!iwl_is_ready_rf(priv)) { + IWL_DEBUG_MAC80211("leave - RF not ready\n"); + return -EIO; + } + + spin_lock_irqsave(&priv->lock, flags); + + for (i = 0; i < AC_NUM; i++) { + txq = &priv->txq[i]; + q = &txq->q; + avail = iwl_queue_space(q); + + stats->data[i].len = q->n_window - avail; + stats->data[i].limit = q->n_window - q->high_mark; + stats->data[i].count = q->n_window; + + } + spin_unlock_irqrestore(&priv->lock, flags); + + IWL_DEBUG_MAC80211("leave\n"); + + return 0; +} + +static int iwl_mac_get_stats(struct ieee80211_hw *hw, + struct ieee80211_low_level_stats *stats) +{ + IWL_DEBUG_MAC80211("enter\n"); + IWL_DEBUG_MAC80211("leave\n"); + + return 0; +} + +static u64 iwl_mac_get_tsf(struct ieee80211_hw *hw) +{ + IWL_DEBUG_MAC80211("enter\n"); + IWL_DEBUG_MAC80211("leave\n"); + + return 0; +} + +static void iwl_mac_reset_tsf(struct ieee80211_hw *hw) +{ + struct iwl_priv *priv = hw->priv; + unsigned long flags; + + mutex_lock(&priv->mutex); + IWL_DEBUG_MAC80211("enter\n"); + +#ifdef CONFIG_IWLWIFI_QOS + iwl_reset_qos(priv); +#endif + cancel_delayed_work(&priv->post_associate); + + spin_lock_irqsave(&priv->lock, flags); + priv->assoc_id = 0; + priv->assoc_capability = 0; + priv->call_post_assoc_from_beacon = 0; + + /* new association get rid of ibss beacon skb */ + if (priv->ibss_beacon) + dev_kfree_skb(priv->ibss_beacon); + + priv->ibss_beacon = NULL; + + priv->beacon_int = priv->hw->conf.beacon_int; + priv->timestamp1 = 0; + priv->timestamp0 = 0; + if ((priv->iw_mode == IEEE80211_IF_TYPE_STA)) + priv->beacon_int = 0; + + spin_unlock_irqrestore(&priv->lock, flags); + + /* Per mac80211.h: This is only used in IBSS mode... */ + if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) { + IWL_DEBUG_MAC80211("leave - not in IBSS\n"); + mutex_unlock(&priv->mutex); + return; + } + + if (!iwl_is_ready_rf(priv)) { + IWL_DEBUG_MAC80211("leave - not ready\n"); + mutex_unlock(&priv->mutex); + return; + } + + priv->only_active_channel = 0; + + iwl_set_rate(priv); + + mutex_unlock(&priv->mutex); + + IWL_DEBUG_MAC80211("leave\n"); + +} + +static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb, + struct ieee80211_tx_control *control) +{ + struct iwl_priv *priv = hw->priv; + unsigned long flags; + + mutex_lock(&priv->mutex); + IWL_DEBUG_MAC80211("enter\n"); + + if (!iwl_is_ready_rf(priv)) { + IWL_DEBUG_MAC80211("leave - RF not ready\n"); + mutex_unlock(&priv->mutex); + return -EIO; + } + + if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) { + IWL_DEBUG_MAC80211("leave - not IBSS\n"); + mutex_unlock(&priv->mutex); + return -EIO; + } + + spin_lock_irqsave(&priv->lock, flags); + + if (priv->ibss_beacon) + dev_kfree_skb(priv->ibss_beacon); + + priv->ibss_beacon = skb; + + priv->assoc_id = 0; + + IWL_DEBUG_MAC80211("leave\n"); + spin_unlock_irqrestore(&priv->lock, flags); + +#ifdef CONFIG_IWLWIFI_QOS + iwl_reset_qos(priv); +#endif + + queue_work(priv->workqueue, &priv->post_associate.work); + + mutex_unlock(&priv->mutex); + + return 0; +} + +/***************************************************************************** + * + * sysfs attributes + * + *****************************************************************************/ + +#ifdef CONFIG_IWLWIFI_DEBUG + +/* + * The following adds a new attribute to the sysfs representation + * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/) + * used for controlling the debug level. + * + * See the level definitions in iwl for details. + */ + +static ssize_t show_debug_level(struct device_driver *d, char *buf) +{ + return sprintf(buf, "0x%08X\n", iwl_debug_level); +} +static ssize_t store_debug_level(struct device_driver *d, + const char *buf, size_t count) +{ + char *p = (char *)buf; + u32 val; + + val = simple_strtoul(p, &p, 0); + if (p == buf) + printk(KERN_INFO DRV_NAME + ": %s is not in hex or decimal form.\n", buf); + else + iwl_debug_level = val; + + return strnlen(buf, count); +} + +static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO, + show_debug_level, store_debug_level); + +#endif /* CONFIG_IWLWIFI_DEBUG */ + +static ssize_t show_rf_kill(struct device *d, + struct device_attribute *attr, char *buf) +{ + /* + * 0 - RF kill not enabled + * 1 - SW based RF kill active (sysfs) + * 2 - HW based RF kill active + * 3 - Both HW and SW based RF kill active + */ + struct iwl_priv *priv = (struct iwl_priv *)d->driver_data; + int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) | + (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0); + + return sprintf(buf, "%i\n", val); +} + +static ssize_t store_rf_kill(struct device *d, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct iwl_priv *priv = (struct iwl_priv *)d->driver_data; + + mutex_lock(&priv->mutex); + iwl_radio_kill_sw(priv, buf[0] == '1'); + mutex_unlock(&priv->mutex); + + return count; +} + +static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill); + +static ssize_t show_temperature(struct device *d, + struct device_attribute *attr, char *buf) +{ + struct iwl_priv *priv = (struct iwl_priv *)d->driver_data; + + if (!iwl_is_alive(priv)) + return -EAGAIN; + + return sprintf(buf, "%d\n", iwl_hw_get_temperature(priv)); +} + +static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL); + +static ssize_t show_rs_window(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct iwl_priv *priv = d->driver_data; + return iwl_fill_rs_info(priv->hw, buf, IWL_AP_ID); +} +static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL); + +static ssize_t show_tx_power(struct device *d, + struct device_attribute *attr, char *buf) +{ + struct iwl_priv *priv = (struct iwl_priv *)d->driver_data; + return sprintf(buf, "%d\n", priv->user_txpower_limit); +} + +static ssize_t store_tx_power(struct device *d, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct iwl_priv *priv = (struct iwl_priv *)d->driver_data; + char *p = (char *)buf; + u32 val; + + val = simple_strtoul(p, &p, 10); + if (p == buf) + printk(KERN_INFO DRV_NAME + ": %s is not in decimal form.\n", buf); + else + iwl_hw_reg_set_txpower(priv, val); + + return count; +} + +static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power); + +static ssize_t show_flags(struct device *d, + struct device_attribute *attr, char *buf) +{ + struct iwl_priv *priv = (struct iwl_priv *)d->driver_data; + + return sprintf(buf, "0x%04X\n", priv->active_rxon.flags); +} + +static ssize_t store_flags(struct device *d, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct iwl_priv *priv = (struct iwl_priv *)d->driver_data; + u32 flags = simple_strtoul(buf, NULL, 0); + + mutex_lock(&priv->mutex); + if (le32_to_cpu(priv->staging_rxon.flags) != flags) { + /* Cancel any currently running scans... */ + if (iwl_scan_cancel_timeout(priv, 100)) + IWL_WARNING("Could not cancel scan.\n"); + else { + IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n", + flags); + priv->staging_rxon.flags = cpu_to_le32(flags); + iwl_commit_rxon(priv); + } + } + mutex_unlock(&priv->mutex); + + return count; +} + +static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags); + +static ssize_t show_filter_flags(struct device *d, + struct device_attribute *attr, char *buf) +{ + struct iwl_priv *priv = (struct iwl_priv *)d->driver_data; + + return sprintf(buf, "0x%04X\n", + le32_to_cpu(priv->active_rxon.filter_flags)); +} + +static ssize_t store_filter_flags(struct device *d, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct iwl_priv *priv = (struct iwl_priv *)d->driver_data; + u32 filter_flags = simple_strtoul(buf, NULL, 0); + + mutex_lock(&priv->mutex); + if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) { + /* Cancel any currently running scans... */ + if (iwl_scan_cancel_timeout(priv, 100)) + IWL_WARNING("Could not cancel scan.\n"); + else { + IWL_DEBUG_INFO("Committing rxon.filter_flags = " + "0x%04X\n", filter_flags); + priv->staging_rxon.filter_flags = + cpu_to_le32(filter_flags); + iwl_commit_rxon(priv); + } + } + mutex_unlock(&priv->mutex); + + return count; +} + +static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags, + store_filter_flags); + +static ssize_t show_tune(struct device *d, + struct device_attribute *attr, char *buf) +{ + struct iwl_priv *priv = (struct iwl_priv *)d->driver_data; + + return sprintf(buf, "0x%04X\n", + (priv->phymode << 8) | + le16_to_cpu(priv->active_rxon.channel)); +} + +static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode); + +static ssize_t store_tune(struct device *d, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct iwl_priv *priv = (struct iwl_priv *)d->driver_data; + char *p = (char *)buf; + u16 tune = simple_strtoul(p, &p, 0); + u8 phymode = (tune >> 8) & 0xff; + u16 channel = tune & 0xff; + + IWL_DEBUG_INFO("Tune request to:%d channel:%d\n", phymode, channel); + + mutex_lock(&priv->mutex); + if ((le16_to_cpu(priv->staging_rxon.channel) != channel) || + (priv->phymode != phymode)) { + const struct iwl_channel_info *ch_info; + + ch_info = iwl_get_channel_info(priv, phymode, channel); + if (!ch_info) { + IWL_WARNING("Requested invalid phymode/channel " + "combination: %d %d\n", phymode, channel); + mutex_unlock(&priv->mutex); + return -EINVAL; + } + + /* Cancel any currently running scans... */ + if (iwl_scan_cancel_timeout(priv, 100)) + IWL_WARNING("Could not cancel scan.\n"); + else { + IWL_DEBUG_INFO("Committing phymode and " + "rxon.channel = %d %d\n", + phymode, channel); + + iwl_set_rxon_channel(priv, phymode, channel); + iwl_set_flags_for_phymode(priv, phymode); + + iwl_set_rate(priv); + iwl_commit_rxon(priv); + } + } + mutex_unlock(&priv->mutex); + + return count; +} + +static DEVICE_ATTR(tune, S_IWUSR | S_IRUGO, show_tune, store_tune); + +#ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT + +static ssize_t show_measurement(struct device *d, + struct device_attribute *attr, char *buf) +{ + struct iwl_priv *priv = dev_get_drvdata(d); + struct iwl_spectrum_notification measure_report; + u32 size = sizeof(measure_report), len = 0, ofs = 0; + u8 *data = (u8 *) & measure_report; + unsigned long flags; + + spin_lock_irqsave(&priv->lock, flags); + if (!(priv->measurement_status & MEASUREMENT_READY)) { + spin_unlock_irqrestore(&priv->lock, flags); + return 0; + } + memcpy(&measure_report, &priv->measure_report, size); + priv->measurement_status = 0; + spin_unlock_irqrestore(&priv->lock, flags); + + while (size && (PAGE_SIZE - len)) { + hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len, + PAGE_SIZE - len, 1); + len = strlen(buf); + if (PAGE_SIZE - len) + buf[len++] = '\n'; + + ofs += 16; + size -= min(size, 16U); + } + + return len; +} + +static ssize_t store_measurement(struct device *d, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct iwl_priv *priv = dev_get_drvdata(d); + struct ieee80211_measurement_params params = { + .channel = le16_to_cpu(priv->active_rxon.channel), + .start_time = cpu_to_le64(priv->last_tsf), + .duration = cpu_to_le16(1), + }; + u8 type = IWL_MEASURE_BASIC; + u8 buffer[32]; + u8 channel; + + if (count) { + char *p = buffer; + strncpy(buffer, buf, min(sizeof(buffer), count)); + channel = simple_strtoul(p, NULL, 0); + if (channel) + params.channel = channel; + + p = buffer; + while (*p && *p != ' ') + p++; + if (*p) + type = simple_strtoul(p + 1, NULL, 0); + } + + IWL_DEBUG_INFO("Invoking measurement of type %d on " + "channel %d (for '%s')\n", type, params.channel, buf); + iwl_get_measurement(priv, ¶ms, type); + + return count; +} + +static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR, + show_measurement, store_measurement); +#endif /* CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT */ + +static ssize_t show_rate(struct device *d, + struct device_attribute *attr, char *buf) +{ + struct iwl_priv *priv = dev_get_drvdata(d); + unsigned long flags; + int i; + + spin_lock_irqsave(&priv->sta_lock, flags); + if (priv->iw_mode == IEEE80211_IF_TYPE_STA) + i = priv->stations[IWL_AP_ID].current_rate.s.rate; + else + i = priv->stations[IWL_STA_ID].current_rate.s.rate; + spin_unlock_irqrestore(&priv->sta_lock, flags); + + i = iwl_rate_index_from_plcp(i); + if (i == -1) + return sprintf(buf, "0\n"); + + return sprintf(buf, "%d%s\n", + (iwl_rates[i].ieee >> 1), + (iwl_rates[i].ieee & 0x1) ? ".5" : ""); +} + +static DEVICE_ATTR(rate, S_IRUSR, show_rate, NULL); + +static ssize_t store_retry_rate(struct device *d, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct iwl_priv *priv = dev_get_drvdata(d); + + priv->retry_rate = simple_strtoul(buf, NULL, 0); + if (priv->retry_rate <= 0) + priv->retry_rate = 1; + + return count; +} + +static ssize_t show_retry_rate(struct device *d, + struct device_attribute *attr, char *buf) +{ + struct iwl_priv *priv = dev_get_drvdata(d); + return sprintf(buf, "%d", priv->retry_rate); +} + +static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate, + store_retry_rate); + +static ssize_t store_power_level(struct device *d, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct iwl_priv *priv = dev_get_drvdata(d); + int rc; + int mode; + + mode = simple_strtoul(buf, NULL, 0); + mutex_lock(&priv->mutex); + + if (!iwl_is_ready(priv)) { + rc = -EAGAIN; + goto out; + } + + if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC)) + mode = IWL_POWER_AC; + else + mode |= IWL_POWER_ENABLED; + + if (mode != priv->power_mode) { + rc = iwl_send_power_mode(priv, IWL_POWER_LEVEL(mode)); + if (rc) { + IWL_DEBUG_MAC80211("failed setting power mode.\n"); + goto out; + } + priv->power_mode = mode; + } + + rc = count; + + out: + mutex_unlock(&priv->mutex); + return rc; +} + +#define MAX_WX_STRING 80 + +/* Values are in microsecond */ +static const s32 timeout_duration[] = { + 350000, + 250000, + 75000, + 37000, + 25000, +}; +static const s32 period_duration[] = { + 400000, + 700000, + 1000000, + 1000000, + 1000000 +}; + +static ssize_t show_power_level(struct device *d, + struct device_attribute *attr, char *buf) +{ + struct iwl_priv *priv = dev_get_drvdata(d); + int level = IWL_POWER_LEVEL(priv->power_mode); + char *p = buf; + + p += sprintf(p, "%d ", level); + switch (level) { + case IWL_POWER_MODE_CAM: + case IWL_POWER_AC: + p += sprintf(p, "(AC)"); + break; + case IWL_POWER_BATTERY: + p += sprintf(p, "(BATTERY)"); + break; + default: + p += sprintf(p, + "(Timeout %dms, Period %dms)", + timeout_duration[level - 1] / 1000, + period_duration[level - 1] / 1000); + } + + if (!(priv->power_mode & IWL_POWER_ENABLED)) + p += sprintf(p, " OFF\n"); + else + p += sprintf(p, " \n"); + + return (p - buf + 1); + +} + +static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level, + store_power_level); + +static ssize_t show_channels(struct device *d, + struct device_attribute *attr, char *buf) +{ + struct iwl_priv *priv = dev_get_drvdata(d); + int len = 0, i; + struct ieee80211_channel *channels = NULL; + const struct ieee80211_hw_mode *hw_mode = NULL; + int count = 0; + + if (!iwl_is_ready(priv)) + return -EAGAIN; + + hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211G); + if (!hw_mode) + hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211B); + if (hw_mode) { + channels = hw_mode->channels; + count = hw_mode->num_channels; + } + + len += + sprintf(&buf[len], + "Displaying %d channels in 2.4GHz band " + "(802.11bg):\n", count); + + for (i = 0; i < count; i++) + len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n", + channels[i].chan, + channels[i].power_level, + channels[i]. + flag & IEEE80211_CHAN_W_RADAR_DETECT ? + " (IEEE 802.11h required)" : "", + (!(channels[i].flag & IEEE80211_CHAN_W_IBSS) + || (channels[i]. + flag & + IEEE80211_CHAN_W_RADAR_DETECT)) ? "" : + ", IBSS", + channels[i]. + flag & IEEE80211_CHAN_W_ACTIVE_SCAN ? + "active/passive" : "passive only"); + + hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211A); + if (hw_mode) { + channels = hw_mode->channels; + count = hw_mode->num_channels; + } else { + channels = NULL; + count = 0; + } + + len += sprintf(&buf[len], "Displaying %d channels in 5.2GHz band " + "(802.11a):\n", count); + + for (i = 0; i < count; i++) + len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n", + channels[i].chan, + channels[i].power_level, + channels[i]. + flag & IEEE80211_CHAN_W_RADAR_DETECT ? + " (IEEE 802.11h required)" : "", + (!(channels[i].flag & IEEE80211_CHAN_W_IBSS) + || (channels[i]. + flag & + IEEE80211_CHAN_W_RADAR_DETECT)) ? "" : + ", IBSS", + channels[i]. + flag & IEEE80211_CHAN_W_ACTIVE_SCAN ? + "active/passive" : "passive only"); + + return len; +} + +static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL); + +static ssize_t show_statistics(struct device *d, + struct device_attribute *attr, char *buf) +{ + struct iwl_priv *priv = dev_get_drvdata(d); + u32 size = sizeof(struct iwl_notif_statistics); + u32 len = 0, ofs = 0; + u8 *data = (u8 *) & priv->statistics; + int rc = 0; + + if (!iwl_is_alive(priv)) + return -EAGAIN; + + mutex_lock(&priv->mutex); + rc = iwl_send_statistics_request(priv); + mutex_unlock(&priv->mutex); + + if (rc) { + len = sprintf(buf, + "Error sending statistics request: 0x%08X\n", rc); + return len; + } + + while (size && (PAGE_SIZE - len)) { + hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len, + PAGE_SIZE - len, 1); + len = strlen(buf); + if (PAGE_SIZE - len) + buf[len++] = '\n'; + + ofs += 16; + size -= min(size, 16U); + } + + return len; +} + +static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL); + +static ssize_t show_antenna(struct device *d, + struct device_attribute *attr, char *buf) +{ + struct iwl_priv *priv = dev_get_drvdata(d); + + if (!iwl_is_alive(priv)) + return -EAGAIN; + + return sprintf(buf, "%d\n", priv->antenna); +} + +static ssize_t store_antenna(struct device *d, + struct device_attribute *attr, + const char *buf, size_t count) +{ + int ant; + struct iwl_priv *priv = dev_get_drvdata(d); + + if (count == 0) + return 0; + + if (sscanf(buf, "%1i", &ant) != 1) { + IWL_DEBUG_INFO("not in hex or decimal form.\n"); + return count; + } + + if ((ant >= 0) && (ant <= 2)) { + IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant); + priv->antenna = (enum iwl_antenna)ant; + } else + IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant); + + + return count; +} + +static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna); + +static ssize_t show_status(struct device *d, + struct device_attribute *attr, char *buf) +{ + struct iwl_priv *priv = (struct iwl_priv *)d->driver_data; + if (!iwl_is_alive(priv)) + return -EAGAIN; + return sprintf(buf, "0x%08x\n", (int)priv->status); +} + +static DEVICE_ATTR(status, S_IRUGO, show_status, NULL); + +static ssize_t dump_error_log(struct device *d, + struct device_attribute *attr, + const char *buf, size_t count) +{ + char *p = (char *)buf; + + if (p[0] == '1') + iwl_dump_nic_error_log((struct iwl_priv *)d->driver_data); + + return strnlen(buf, count); +} + +static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log); + +static ssize_t dump_event_log(struct device *d, + struct device_attribute *attr, + const char *buf, size_t count) +{ + char *p = (char *)buf; + + if (p[0] == '1') + iwl_dump_nic_event_log((struct iwl_priv *)d->driver_data); + + return strnlen(buf, count); +} + +static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log); + +/***************************************************************************** + * + * driver setup and teardown + * + *****************************************************************************/ + +static void iwl_setup_deferred_work(struct iwl_priv *priv) +{ + priv->workqueue = create_workqueue(DRV_NAME); + + init_waitqueue_head(&priv->wait_command_queue); + + INIT_WORK(&priv->up, iwl_bg_up); + INIT_WORK(&priv->restart, iwl_bg_restart); + INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish); + INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed); + INIT_WORK(&priv->request_scan, iwl_bg_request_scan); + INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan); + INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill); + INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update); + INIT_DELAYED_WORK(&priv->post_associate, iwl_bg_post_associate); + INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start); + INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start); + INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check); + + iwl_hw_setup_deferred_work(priv); + + tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long)) + iwl_irq_tasklet, (unsigned long)priv); +} + +static void iwl_cancel_deferred_work(struct iwl_priv *priv) +{ + iwl_hw_cancel_deferred_work(priv); + + cancel_delayed_work(&priv->scan_check); + cancel_delayed_work(&priv->alive_start); + cancel_delayed_work(&priv->post_associate); + cancel_work_sync(&priv->beacon_update); +} + +static struct attribute *iwl_sysfs_entries[] = { + &dev_attr_antenna.attr, + &dev_attr_channels.attr, + &dev_attr_dump_errors.attr, + &dev_attr_dump_events.attr, + &dev_attr_flags.attr, + &dev_attr_filter_flags.attr, +#ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT + &dev_attr_measurement.attr, +#endif + &dev_attr_power_level.attr, + &dev_attr_rate.attr, + &dev_attr_retry_rate.attr, + &dev_attr_rf_kill.attr, + &dev_attr_rs_window.attr, + &dev_attr_statistics.attr, + &dev_attr_status.attr, + &dev_attr_temperature.attr, + &dev_attr_tune.attr, + &dev_attr_tx_power.attr, + + NULL +}; + +static struct attribute_group iwl_attribute_group = { + .name = NULL, /* put in device directory */ + .attrs = iwl_sysfs_entries, +}; + +static struct ieee80211_ops iwl_hw_ops = { + .tx = iwl_mac_tx, + .start = iwl_mac_start, + .stop = iwl_mac_stop, + .add_interface = iwl_mac_add_interface, + .remove_interface = iwl_mac_remove_interface, + .config = iwl_mac_config, + .config_interface = iwl_mac_config_interface, + .configure_filter = iwl_configure_filter, + .set_key = iwl_mac_set_key, + .get_stats = iwl_mac_get_stats, + .get_tx_stats = iwl_mac_get_tx_stats, + .conf_tx = iwl_mac_conf_tx, + .get_tsf = iwl_mac_get_tsf, + .reset_tsf = iwl_mac_reset_tsf, + .beacon_update = iwl_mac_beacon_update, + .hw_scan = iwl_mac_hw_scan +}; + +static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) +{ + int err = 0; + u32 pci_id; + struct iwl_priv *priv; + struct ieee80211_hw *hw; + int i; + + if (iwl_param_disable_hw_scan) { + IWL_DEBUG_INFO("Disabling hw_scan\n"); + iwl_hw_ops.hw_scan = NULL; + } + + if ((iwl_param_queues_num > IWL_MAX_NUM_QUEUES) || + (iwl_param_queues_num < IWL_MIN_NUM_QUEUES)) { + IWL_ERROR("invalid queues_num, should be between %d and %d\n", + IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES); + err = -EINVAL; + goto out; + } + + /* mac80211 allocates memory for this device instance, including + * space for this driver's private structure */ + hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwl_hw_ops); + if (hw == NULL) { + IWL_ERROR("Can not allocate network device\n"); + err = -ENOMEM; + goto out; + } + SET_IEEE80211_DEV(hw, &pdev->dev); + + IWL_DEBUG_INFO("*** LOAD DRIVER ***\n"); + priv = hw->priv; + priv->hw = hw; + + priv->pci_dev = pdev; + priv->antenna = (enum iwl_antenna)iwl_param_antenna; +#ifdef CONFIG_IWLWIFI_DEBUG + iwl_debug_level = iwl_param_debug; + atomic_set(&priv->restrict_refcnt, 0); +#endif + priv->retry_rate = 1; + + priv->ibss_beacon = NULL; + + /* Tell mac80211 and its clients (e.g. Wireless Extensions) + * the range of signal quality values that we'll provide. + * Negative values for level/noise indicate that we'll provide dBm. + * For WE, at least, non-0 values here *enable* display of values + * in app (iwconfig). */ + hw->max_rssi = -20; /* signal level, negative indicates dBm */ + hw->max_noise = -20; /* noise level, negative indicates dBm */ + hw->max_signal = 100; /* link quality indication (%) */ + + /* Tell mac80211 our Tx characteristics */ + hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE; + + hw->queues = 4; + + spin_lock_init(&priv->lock); + spin_lock_init(&priv->power_data.lock); + spin_lock_init(&priv->sta_lock); + spin_lock_init(&priv->hcmd_lock); + + for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) + INIT_LIST_HEAD(&priv->ibss_mac_hash[i]); + + INIT_LIST_HEAD(&priv->free_frames); + + mutex_init(&priv->mutex); + if (pci_enable_device(pdev)) { + err = -ENODEV; + goto out_ieee80211_free_hw; + } + + pci_set_master(pdev); + + iwl_clear_stations_table(priv); + + priv->data_retry_limit = -1; + priv->ieee_channels = NULL; + priv->ieee_rates = NULL; + priv->phymode = -1; + + err = pci_set_dma_mask(pdev, DMA_32BIT_MASK); + if (!err) + err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK); + if (err) { + printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n"); + goto out_pci_disable_device; + } + + pci_set_drvdata(pdev, priv); + err = pci_request_regions(pdev, DRV_NAME); + if (err) + goto out_pci_disable_device; + /* We disable the RETRY_TIMEOUT register (0x41) to keep + * PCI Tx retries from interfering with C3 CPU state */ + pci_write_config_byte(pdev, 0x41, 0x00); + priv->hw_base = pci_iomap(pdev, 0, 0); + if (!priv->hw_base) { + err = -ENODEV; + goto out_pci_release_regions; + } + + IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n", + (unsigned long long) pci_resource_len(pdev, 0)); + IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base); + + /* Initialize module parameter values here */ + + if (iwl_param_disable) { + set_bit(STATUS_RF_KILL_SW, &priv->status); + IWL_DEBUG_INFO("Radio disabled.\n"); + } + + priv->iw_mode = IEEE80211_IF_TYPE_STA; + + pci_id = + (priv->pci_dev->device << 16) | priv->pci_dev->subsystem_device; + + switch (pci_id) { + case 0x42221005: /* 0x4222 0x8086 0x1005 is BG SKU */ + case 0x42221034: /* 0x4222 0x8086 0x1034 is BG SKU */ + case 0x42271014: /* 0x4227 0x8086 0x1014 is BG SKU */ + case 0x42221044: /* 0x4222 0x8086 0x1044 is BG SKU */ + priv->is_abg = 0; + break; + + /* + * Rest are assumed ABG SKU -- if this is not the + * case then the card will get the wrong 'Detected' + * line in the kernel log however the code that + * initializes the GEO table will detect no A-band + * channels and remove the is_abg mask. + */ + default: + priv->is_abg = 1; + break; + } + + printk(KERN_INFO DRV_NAME + ": Detected Intel PRO/Wireless 3945%sBG Network Connection\n", + priv->is_abg ? "A" : ""); + + /* Device-specific setup */ + if (iwl_hw_set_hw_setting(priv)) { + IWL_ERROR("failed to set hw settings\n"); + mutex_unlock(&priv->mutex); + goto out_iounmap; + } + +#ifdef CONFIG_IWLWIFI_QOS + if (iwl_param_qos_enable) + priv->qos_data.qos_enable = 1; + + iwl_reset_qos(priv); + + priv->qos_data.qos_active = 0; + priv->qos_data.qos_cap.val = 0; +#endif /* CONFIG_IWLWIFI_QOS */ + + iwl_set_rxon_channel(priv, MODE_IEEE80211G, 6); + iwl_setup_deferred_work(priv); + iwl_setup_rx_handlers(priv); + + priv->rates_mask = IWL_RATES_MASK; + /* If power management is turned on, default to AC mode */ + priv->power_mode = IWL_POWER_AC; + priv->user_txpower_limit = IWL_DEFAULT_TX_POWER; + + pci_enable_msi(pdev); + + err = request_irq(pdev->irq, iwl_isr, IRQF_SHARED, DRV_NAME, priv); + if (err) { + IWL_ERROR("Error allocating IRQ %d\n", pdev->irq); + goto out_disable_msi; + } + + mutex_lock(&priv->mutex); + + err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group); + if (err) { + IWL_ERROR("failed to create sysfs device attributes\n"); + mutex_unlock(&priv->mutex); + goto out_release_irq; + } + + /* fetch ucode file from disk, alloc and copy to bus-master buffers ... + * ucode filename and max sizes are card-specific. */ + err = iwl_read_ucode(priv); + if (err) { + IWL_ERROR("Could not read microcode: %d\n", err); + mutex_unlock(&priv->mutex); + goto out_pci_alloc; + } + + mutex_unlock(&priv->mutex); + + IWL_DEBUG_INFO("Queing UP work.\n"); + + queue_work(priv->workqueue, &priv->up); + + return 0; + + out_pci_alloc: + iwl_dealloc_ucode_pci(priv); + + sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group); + + out_release_irq: + free_irq(pdev->irq, priv); + + out_disable_msi: + pci_disable_msi(pdev); + destroy_workqueue(priv->workqueue); + priv->workqueue = NULL; + iwl_unset_hw_setting(priv); + + out_iounmap: + pci_iounmap(pdev, priv->hw_base); + out_pci_release_regions: + pci_release_regions(pdev); + out_pci_disable_device: + pci_disable_device(pdev); + pci_set_drvdata(pdev, NULL); + out_ieee80211_free_hw: + ieee80211_free_hw(priv->hw); + out: + return err; +} + +static void iwl_pci_remove(struct pci_dev *pdev) +{ + struct iwl_priv *priv = pci_get_drvdata(pdev); + struct list_head *p, *q; + int i; + + if (!priv) + return; + + IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n"); + + mutex_lock(&priv->mutex); + set_bit(STATUS_EXIT_PENDING, &priv->status); + __iwl_down(priv); + mutex_unlock(&priv->mutex); + + /* Free MAC hash list for ADHOC */ + for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) { + list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) { + list_del(p); + kfree(list_entry(p, struct iwl_ibss_seq, list)); + } + } + + sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group); + + iwl_dealloc_ucode_pci(priv); + + if (priv->rxq.bd) + iwl_rx_queue_free(priv, &priv->rxq); + iwl_hw_txq_ctx_free(priv); + + iwl_unset_hw_setting(priv); + iwl_clear_stations_table(priv); + + if (priv->mac80211_registered) { + ieee80211_unregister_hw(priv->hw); + iwl_rate_control_unregister(priv->hw); + } + + /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes + * priv->workqueue... so we can't take down the workqueue + * until now... */ + destroy_workqueue(priv->workqueue); + priv->workqueue = NULL; + + free_irq(pdev->irq, priv); + pci_disable_msi(pdev); + pci_iounmap(pdev, priv->hw_base); + pci_release_regions(pdev); + pci_disable_device(pdev); + pci_set_drvdata(pdev, NULL); + + kfree(priv->channel_info); + + kfree(priv->ieee_channels); + kfree(priv->ieee_rates); + + if (priv->ibss_beacon) + dev_kfree_skb(priv->ibss_beacon); + + ieee80211_free_hw(priv->hw); +} + +#ifdef CONFIG_PM + +static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state) +{ + struct iwl_priv *priv = pci_get_drvdata(pdev); + + mutex_lock(&priv->mutex); + + set_bit(STATUS_IN_SUSPEND, &priv->status); + + /* Take down the device; powers it off, etc. */ + __iwl_down(priv); + + if (priv->mac80211_registered) + ieee80211_stop_queues(priv->hw); + + pci_save_state(pdev); + pci_disable_device(pdev); + pci_set_power_state(pdev, PCI_D3hot); + + mutex_unlock(&priv->mutex); + + return 0; +} + +static void iwl_resume(struct iwl_priv *priv) +{ + unsigned long flags; + + /* The following it a temporary work around due to the + * suspend / resume not fully initializing the NIC correctly. + * Without all of the following, resume will not attempt to take + * down the NIC (it shouldn't really need to) and will just try + * and bring the NIC back up. However that fails during the + * ucode verification process. This then causes iwl_down to be + * called *after* iwl_hw_nic_init() has succeeded -- which + * then lets the next init sequence succeed. So, we've + * replicated all of that NIC init code here... */ + + iwl_write32(priv, CSR_INT, 0xFFFFFFFF); + + iwl_hw_nic_init(priv); + + iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); + iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, + CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); + iwl_write32(priv, CSR_INT, 0xFFFFFFFF); + iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); + iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); + + /* tell the device to stop sending interrupts */ + iwl_disable_interrupts(priv); + + spin_lock_irqsave(&priv->lock, flags); + iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); + + if (!iwl_grab_restricted_access(priv)) { + iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG, + APMG_CLK_VAL_DMA_CLK_RQT); + iwl_release_restricted_access(priv); + } + spin_unlock_irqrestore(&priv->lock, flags); + + udelay(5); + + iwl_hw_nic_reset(priv); + + /* Bring the device back up */ + clear_bit(STATUS_IN_SUSPEND, &priv->status); + queue_work(priv->workqueue, &priv->up); +} + +static int iwl_pci_resume(struct pci_dev *pdev) +{ + struct iwl_priv *priv = pci_get_drvdata(pdev); + int err; + + printk(KERN_INFO "Coming out of suspend...\n"); + + mutex_lock(&priv->mutex); + + pci_set_power_state(pdev, PCI_D0); + err = pci_enable_device(pdev); + pci_restore_state(pdev); + + /* + * Suspend/Resume resets the PCI configuration space, so we have to + * re-disable the RETRY_TIMEOUT register (0x41) to keep PCI Tx retries + * from interfering with C3 CPU state. pci_restore_state won't help + * here since it only restores the first 64 bytes pci config header. + */ + pci_write_config_byte(pdev, 0x41, 0x00); + + iwl_resume(priv); + mutex_unlock(&priv->mutex); + + return 0; +} + +#endif /* CONFIG_PM */ + +/***************************************************************************** + * + * driver and module entry point + * + *****************************************************************************/ + +static struct pci_driver iwl_driver = { + .name = DRV_NAME, + .id_table = iwl_hw_card_ids, + .probe = iwl_pci_probe, + .remove = __devexit_p(iwl_pci_remove), +#ifdef CONFIG_PM + .suspend = iwl_pci_suspend, + .resume = iwl_pci_resume, +#endif +}; + +static int __init iwl_init(void) +{ + + int ret; + printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n"); + printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n"); + ret = pci_register_driver(&iwl_driver); + if (ret) { + IWL_ERROR("Unable to initialize PCI module\n"); + return ret; + } +#ifdef CONFIG_IWLWIFI_DEBUG + ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level); + if (ret) { + IWL_ERROR("Unable to create driver sysfs file\n"); + pci_unregister_driver(&iwl_driver); + return ret; + } +#endif + + return ret; +} + +static void __exit iwl_exit(void) +{ +#ifdef CONFIG_IWLWIFI_DEBUG + driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level); +#endif + pci_unregister_driver(&iwl_driver); +} + +module_param_named(antenna, iwl_param_antenna, int, 0444); +MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])"); +module_param_named(disable, iwl_param_disable, int, 0444); +MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])"); +module_param_named(hwcrypto, iwl_param_hwcrypto, int, 0444); +MODULE_PARM_DESC(hwcrypto, + "using hardware crypto engine (default 0 [software])\n"); +module_param_named(debug, iwl_param_debug, int, 0444); +MODULE_PARM_DESC(debug, "debug output mask"); +module_param_named(disable_hw_scan, iwl_param_disable_hw_scan, int, 0444); +MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)"); + +module_param_named(queues_num, iwl_param_queues_num, int, 0444); +MODULE_PARM_DESC(queues_num, "number of hw queues."); + +/* QoS */ +module_param_named(qos_enable, iwl_param_qos_enable, int, 0444); +MODULE_PARM_DESC(qos_enable, "enable all QoS functionality"); + +module_exit(iwl_exit); +module_init(iwl_init); |