diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-tx.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-tx.c | 1487 |
1 files changed, 0 insertions, 1487 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-tx.c b/drivers/net/wireless/iwlwifi/iwl-tx.c deleted file mode 100644 index 71d5b8a1a73..00000000000 --- a/drivers/net/wireless/iwlwifi/iwl-tx.c +++ /dev/null @@ -1,1487 +0,0 @@ -/****************************************************************************** - * - * Copyright(c) 2003 - 2009 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: - * Intel Linux Wireless <ilw@linux.intel.com> - * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 - * - *****************************************************************************/ - -#include <linux/etherdevice.h> -#include <net/mac80211.h> -#include "iwl-eeprom.h" -#include "iwl-dev.h" -#include "iwl-core.h" -#include "iwl-sta.h" -#include "iwl-io.h" -#include "iwl-helpers.h" - -static const u16 default_tid_to_tx_fifo[] = { - IWL_TX_FIFO_AC1, - IWL_TX_FIFO_AC0, - IWL_TX_FIFO_AC0, - IWL_TX_FIFO_AC1, - IWL_TX_FIFO_AC2, - IWL_TX_FIFO_AC2, - IWL_TX_FIFO_AC3, - IWL_TX_FIFO_AC3, - IWL_TX_FIFO_NONE, - IWL_TX_FIFO_NONE, - IWL_TX_FIFO_NONE, - IWL_TX_FIFO_NONE, - IWL_TX_FIFO_NONE, - IWL_TX_FIFO_NONE, - IWL_TX_FIFO_NONE, - IWL_TX_FIFO_NONE, - IWL_TX_FIFO_AC3 -}; - -static inline int iwl_alloc_dma_ptr(struct iwl_priv *priv, - struct iwl_dma_ptr *ptr, size_t size) -{ - ptr->addr = pci_alloc_consistent(priv->pci_dev, size, &ptr->dma); - if (!ptr->addr) - return -ENOMEM; - ptr->size = size; - return 0; -} - -static inline void iwl_free_dma_ptr(struct iwl_priv *priv, - struct iwl_dma_ptr *ptr) -{ - if (unlikely(!ptr->addr)) - return; - - pci_free_consistent(priv->pci_dev, ptr->size, ptr->addr, ptr->dma); - memset(ptr, 0, sizeof(*ptr)); -} - -/** - * iwl_txq_update_write_ptr - Send new write index to hardware - */ -int iwl_txq_update_write_ptr(struct iwl_priv *priv, struct iwl_tx_queue *txq) -{ - u32 reg = 0; - int ret = 0; - int txq_id = txq->q.id; - - if (txq->need_update == 0) - return ret; - - /* 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(priv, "Requesting wakeup, GP1 = 0x%x\n", reg); - iwl_set_bit(priv, CSR_GP_CNTRL, - CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); - return ret; - } - - /* restore this queue's parameters in nic hardware. */ - ret = iwl_grab_nic_access(priv); - if (ret) - return ret; - iwl_write_direct32(priv, HBUS_TARG_WRPTR, - txq->q.write_ptr | (txq_id << 8)); - iwl_release_nic_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.write_ptr | (txq_id << 8)); - - txq->need_update = 0; - - return ret; -} -EXPORT_SYMBOL(iwl_txq_update_write_ptr); - - -/** - * iwl_tx_queue_free - Deallocate DMA queue. - * @txq: Transmit queue to deallocate. - * - * Empty queue by removing and destroying all BD's. - * Free all buffers. - * 0-fill, but do not free "txq" descriptor structure. - */ -void iwl_tx_queue_free(struct iwl_priv *priv, int txq_id) -{ - struct iwl_tx_queue *txq = &priv->txq[txq_id]; - struct iwl_queue *q = &txq->q; - struct pci_dev *dev = priv->pci_dev; - int i, len; - - if (q->n_bd == 0) - return; - - /* first, empty all BD's */ - for (; q->write_ptr != q->read_ptr; - q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) - priv->cfg->ops->lib->txq_free_tfd(priv, txq); - - len = sizeof(struct iwl_cmd) * q->n_window; - - /* De-alloc array of command/tx buffers */ - for (i = 0; i < TFD_TX_CMD_SLOTS; i++) - kfree(txq->cmd[i]); - - /* De-alloc circular buffer of TFDs */ - if (txq->q.n_bd) - pci_free_consistent(dev, priv->hw_params.tfd_size * - txq->q.n_bd, txq->tfds, txq->q.dma_addr); - - /* De-alloc array of per-TFD driver data */ - kfree(txq->txb); - txq->txb = NULL; - - /* 0-fill queue descriptor structure */ - memset(txq, 0, sizeof(*txq)); -} -EXPORT_SYMBOL(iwl_tx_queue_free); - -/** - * iwl_cmd_queue_free - Deallocate DMA queue. - * @txq: Transmit queue to deallocate. - * - * Empty queue by removing and destroying all BD's. - * Free all buffers. - * 0-fill, but do not free "txq" descriptor structure. - */ -void iwl_cmd_queue_free(struct iwl_priv *priv) -{ - struct iwl_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM]; - struct iwl_queue *q = &txq->q; - struct pci_dev *dev = priv->pci_dev; - int i, len; - - if (q->n_bd == 0) - return; - - len = sizeof(struct iwl_cmd) * q->n_window; - len += IWL_MAX_SCAN_SIZE; - - /* De-alloc array of command/tx buffers */ - for (i = 0; i <= TFD_CMD_SLOTS; i++) - kfree(txq->cmd[i]); - - /* De-alloc circular buffer of TFDs */ - if (txq->q.n_bd) - pci_free_consistent(dev, priv->hw_params.tfd_size * - txq->q.n_bd, txq->tfds, txq->q.dma_addr); - - /* 0-fill queue descriptor structure */ - memset(txq, 0, sizeof(*txq)); -} -EXPORT_SYMBOL(iwl_cmd_queue_free); - -/*************** DMA-QUEUE-GENERAL-FUNCTIONS ***** - * DMA services - * - * Theory of operation - * - * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer - * of buffer descriptors, each of which points to one or more data buffers for - * the device to read from or fill. Driver and device exchange status of each - * queue via "read" and "write" pointers. Driver keeps minimum of 2 empty - * entries in each circular buffer, to protect against confusing empty and full - * queue states. - * - * The device reads or writes the data in the queues via the device's several - * DMA/FIFO channels. Each queue is mapped to a single DMA channel. - * - * 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. - * - * See more detailed info in iwl-4965-hw.h. - ***************************************************/ - -int iwl_queue_space(const struct iwl_queue *q) -{ - int s = q->read_ptr - q->write_ptr; - - if (q->read_ptr > q->write_ptr) - 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; -} -EXPORT_SYMBOL(iwl_queue_space); - - -/** - * iwl_queue_init - Initialize queue's high/low-water and read/write indexes - */ -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->write_ptr = q->read_ptr = 0; - - return 0; -} - -/** - * iwl_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue - */ -static int iwl_tx_queue_alloc(struct iwl_priv *priv, - struct iwl_tx_queue *txq, u32 id) -{ - struct pci_dev *dev = priv->pci_dev; - size_t tfd_sz = priv->hw_params.tfd_size * TFD_QUEUE_SIZE_MAX; - - /* Driver private data, only for Tx (not command) queues, - * not shared with device. */ - if (id != IWL_CMD_QUEUE_NUM) { - txq->txb = kmalloc(sizeof(txq->txb[0]) * - TFD_QUEUE_SIZE_MAX, GFP_KERNEL); - if (!txq->txb) { - IWL_ERR(priv, "kmalloc for auxiliary BD " - "structures failed\n"); - goto error; - } - } else { - txq->txb = NULL; - } - - /* Circular buffer of transmit frame descriptors (TFDs), - * shared with device */ - txq->tfds = pci_alloc_consistent(dev, tfd_sz, &txq->q.dma_addr); - - if (!txq->tfds) { - IWL_ERR(priv, "pci_alloc_consistent(%zd) failed\n", tfd_sz); - goto error; - } - txq->q.id = id; - - return 0; - - error: - kfree(txq->txb); - txq->txb = NULL; - - return -ENOMEM; -} - -/** - * iwl_tx_queue_init - Allocate and initialize one tx/cmd queue - */ -int iwl_tx_queue_init(struct iwl_priv *priv, struct iwl_tx_queue *txq, - int slots_num, u32 txq_id) -{ - int i, len; - int ret; - - /* - * Alloc buffer array for commands (Tx or other types of commands). - * For the command queue (#4), allocate command space + one big - * command for scan, since scan command is very huge; the system will - * not have two scans at the same time, so only one is needed. - * For normal Tx queues (all other queues), no super-size command - * space is needed. - */ - len = sizeof(struct iwl_cmd); - for (i = 0; i <= slots_num; i++) { - if (i == slots_num) { - if (txq_id == IWL_CMD_QUEUE_NUM) - len += IWL_MAX_SCAN_SIZE; - else - continue; - } - - txq->cmd[i] = kmalloc(len, GFP_KERNEL); - if (!txq->cmd[i]) - goto err; - } - - /* Alloc driver data array and TFD circular buffer */ - ret = iwl_tx_queue_alloc(priv, txq, txq_id); - if (ret) - goto err; - - 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)); - - /* Initialize queue's high/low-water marks, and head/tail indexes */ - iwl_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id); - - /* Tell device where to find queue */ - priv->cfg->ops->lib->txq_init(priv, txq); - - return 0; -err: - for (i = 0; i < slots_num; i++) { - kfree(txq->cmd[i]); - txq->cmd[i] = NULL; - } - - if (txq_id == IWL_CMD_QUEUE_NUM) { - kfree(txq->cmd[slots_num]); - txq->cmd[slots_num] = NULL; - } - return -ENOMEM; -} -EXPORT_SYMBOL(iwl_tx_queue_init); - -/** - * iwl_hw_txq_ctx_free - Free TXQ Context - * - * Destroy all TX DMA queues and structures - */ -void iwl_hw_txq_ctx_free(struct iwl_priv *priv) -{ - int txq_id; - - /* Tx queues */ - for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) - if (txq_id == IWL_CMD_QUEUE_NUM) - iwl_cmd_queue_free(priv); - else - iwl_tx_queue_free(priv, txq_id); - - iwl_free_dma_ptr(priv, &priv->kw); - - iwl_free_dma_ptr(priv, &priv->scd_bc_tbls); -} -EXPORT_SYMBOL(iwl_hw_txq_ctx_free); - -/** - * iwl_txq_ctx_reset - Reset TX queue context - * Destroys all DMA structures and initialize them again - * - * @param priv - * @return error code - */ -int iwl_txq_ctx_reset(struct iwl_priv *priv) -{ - int ret = 0; - int txq_id, slots_num; - unsigned long flags; - - /* Free all tx/cmd queues and keep-warm buffer */ - iwl_hw_txq_ctx_free(priv); - - ret = iwl_alloc_dma_ptr(priv, &priv->scd_bc_tbls, - priv->hw_params.scd_bc_tbls_size); - if (ret) { - IWL_ERR(priv, "Scheduler BC Table allocation failed\n"); - goto error_bc_tbls; - } - /* Alloc keep-warm buffer */ - ret = iwl_alloc_dma_ptr(priv, &priv->kw, IWL_KW_SIZE); - if (ret) { - IWL_ERR(priv, "Keep Warm allocation failed\n"); - goto error_kw; - } - spin_lock_irqsave(&priv->lock, flags); - ret = iwl_grab_nic_access(priv); - if (unlikely(ret)) { - spin_unlock_irqrestore(&priv->lock, flags); - goto error_reset; - } - - /* Turn off all Tx DMA fifos */ - priv->cfg->ops->lib->txq_set_sched(priv, 0); - - /* Tell NIC where to find the "keep warm" buffer */ - iwl_write_direct32(priv, FH_KW_MEM_ADDR_REG, priv->kw.dma >> 4); - - iwl_release_nic_access(priv); - spin_unlock_irqrestore(&priv->lock, flags); - - /* Alloc and init all Tx queues, including the command queue (#4) */ - for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) { - slots_num = (txq_id == IWL_CMD_QUEUE_NUM) ? - TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS; - ret = iwl_tx_queue_init(priv, &priv->txq[txq_id], slots_num, - txq_id); - if (ret) { - IWL_ERR(priv, "Tx %d queue init failed\n", txq_id); - goto error; - } - } - - return ret; - - error: - iwl_hw_txq_ctx_free(priv); - error_reset: - iwl_free_dma_ptr(priv, &priv->kw); - error_kw: - iwl_free_dma_ptr(priv, &priv->scd_bc_tbls); - error_bc_tbls: - return ret; -} - -/** - * iwl_txq_ctx_stop - Stop all Tx DMA channels, free Tx queue memory - */ -void iwl_txq_ctx_stop(struct iwl_priv *priv) -{ - int ch; - unsigned long flags; - - /* Turn off all Tx DMA fifos */ - spin_lock_irqsave(&priv->lock, flags); - if (iwl_grab_nic_access(priv)) { - spin_unlock_irqrestore(&priv->lock, flags); - return; - } - - priv->cfg->ops->lib->txq_set_sched(priv, 0); - - /* Stop each Tx DMA channel, and wait for it to be idle */ - for (ch = 0; ch < priv->hw_params.dma_chnl_num; ch++) { - iwl_write_direct32(priv, FH_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0); - iwl_poll_direct_bit(priv, FH_TSSR_TX_STATUS_REG, - FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch), - 1000); - } - iwl_release_nic_access(priv); - spin_unlock_irqrestore(&priv->lock, flags); - - /* Deallocate memory for all Tx queues */ - iwl_hw_txq_ctx_free(priv); -} -EXPORT_SYMBOL(iwl_txq_ctx_stop); - -/* - * handle build REPLY_TX command notification. - */ -static void iwl_tx_cmd_build_basic(struct iwl_priv *priv, - struct iwl_tx_cmd *tx_cmd, - struct ieee80211_tx_info *info, - struct ieee80211_hdr *hdr, - u8 std_id) -{ - __le16 fc = hdr->frame_control; - __le32 tx_flags = tx_cmd->tx_flags; - - tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; - if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) { - tx_flags |= TX_CMD_FLG_ACK_MSK; - if (ieee80211_is_mgmt(fc)) - tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; - if (ieee80211_is_probe_resp(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; - } - - if (ieee80211_is_back_req(fc)) - tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK; - - - tx_cmd->sta_id = std_id; - if (ieee80211_has_morefrags(fc)) - tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK; - - if (ieee80211_is_data_qos(fc)) { - u8 *qc = ieee80211_get_qos_ctl(hdr); - tx_cmd->tid_tspec = qc[0] & 0xf; - tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK; - } else { - tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; - } - - priv->cfg->ops->utils->rts_tx_cmd_flag(info, &tx_flags); - - 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 (ieee80211_is_mgmt(fc)) { - if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) - tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3); - else - tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2); - } else { - tx_cmd->timeout.pm_frame_timeout = 0; - } - - tx_cmd->driver_txop = 0; - tx_cmd->tx_flags = tx_flags; - tx_cmd->next_frame_len = 0; -} - -#define RTS_HCCA_RETRY_LIMIT 3 -#define RTS_DFAULT_RETRY_LIMIT 60 - -static void iwl_tx_cmd_build_rate(struct iwl_priv *priv, - struct iwl_tx_cmd *tx_cmd, - struct ieee80211_tx_info *info, - __le16 fc, int sta_id, - int is_hcca) -{ - u32 rate_flags = 0; - int rate_idx; - u8 rts_retry_limit = 0; - u8 data_retry_limit = 0; - u8 rate_plcp; - - rate_idx = min(ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xffff, - IWL_RATE_COUNT - 1); - - rate_plcp = iwl_rates[rate_idx].plcp; - - rts_retry_limit = (is_hcca) ? - RTS_HCCA_RETRY_LIMIT : RTS_DFAULT_RETRY_LIMIT; - - if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) - rate_flags |= RATE_MCS_CCK_MSK; - - - if (ieee80211_is_probe_resp(fc)) { - data_retry_limit = 3; - if (data_retry_limit < rts_retry_limit) - rts_retry_limit = data_retry_limit; - } else - data_retry_limit = IWL_DEFAULT_TX_RETRY; - - if (priv->data_retry_limit != -1) - data_retry_limit = priv->data_retry_limit; - - - if (ieee80211_is_data(fc)) { - tx_cmd->initial_rate_index = 0; - tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK; - } else { - switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) { - case cpu_to_le16(IEEE80211_STYPE_AUTH): - case cpu_to_le16(IEEE80211_STYPE_DEAUTH): - case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ): - case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ): - if (tx_cmd->tx_flags & TX_CMD_FLG_RTS_MSK) { - tx_cmd->tx_flags &= ~TX_CMD_FLG_RTS_MSK; - tx_cmd->tx_flags |= TX_CMD_FLG_CTS_MSK; - } - break; - default: - break; - } - - priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant); - rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant); - } - - tx_cmd->rts_retry_limit = rts_retry_limit; - tx_cmd->data_retry_limit = data_retry_limit; - tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags); -} - -static void iwl_tx_cmd_build_hwcrypto(struct iwl_priv *priv, - struct ieee80211_tx_info *info, - struct iwl_tx_cmd *tx_cmd, - struct sk_buff *skb_frag, - int sta_id) -{ - struct ieee80211_key_conf *keyconf = info->control.hw_key; - - switch (keyconf->alg) { - case ALG_CCMP: - tx_cmd->sec_ctl = TX_CMD_SEC_CCM; - memcpy(tx_cmd->key, keyconf->key, keyconf->keylen); - if (info->flags & IEEE80211_TX_CTL_AMPDU) - tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK; - IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n"); - break; - - case ALG_TKIP: - tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; - ieee80211_get_tkip_key(keyconf, skb_frag, - IEEE80211_TKIP_P2_KEY, tx_cmd->key); - IWL_DEBUG_TX(priv, "tx_cmd with tkip hwcrypto\n"); - break; - - case ALG_WEP: - tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP | - (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT); - - if (keyconf->keylen == WEP_KEY_LEN_128) - tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; - - memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); - - IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption " - "with key %d\n", keyconf->keyidx); - break; - - default: - IWL_ERR(priv, "Unknown encode alg %d\n", keyconf->alg); - break; - } -} - -static void iwl_update_tx_stats(struct iwl_priv *priv, u16 fc, u16 len) -{ - /* 0 - mgmt, 1 - cnt, 2 - data */ - int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2; - priv->tx_stats[idx].cnt++; - priv->tx_stats[idx].bytes += len; -} - -/* - * start REPLY_TX command process - */ -int iwl_tx_skb(struct iwl_priv *priv, struct sk_buff *skb) -{ - struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; - struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); - struct iwl_tx_queue *txq; - struct iwl_queue *q; - struct iwl_cmd *out_cmd; - struct iwl_tx_cmd *tx_cmd; - int swq_id, txq_id; - dma_addr_t phys_addr; - dma_addr_t txcmd_phys; - dma_addr_t scratch_phys; - u16 len, len_org; - u16 seq_number = 0; - __le16 fc; - u8 hdr_len; - u8 sta_id; - u8 wait_write_ptr = 0; - u8 tid = 0; - u8 *qc = NULL; - unsigned long flags; - int ret; - - spin_lock_irqsave(&priv->lock, flags); - if (iwl_is_rfkill(priv)) { - IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n"); - goto drop_unlock; - } - - if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == - IWL_INVALID_RATE) { - IWL_ERR(priv, "ERROR: No TX rate available.\n"); - goto drop_unlock; - } - - fc = hdr->frame_control; - -#ifdef CONFIG_IWLWIFI_DEBUG - if (ieee80211_is_auth(fc)) - IWL_DEBUG_TX(priv, "Sending AUTH frame\n"); - else if (ieee80211_is_assoc_req(fc)) - IWL_DEBUG_TX(priv, "Sending ASSOC frame\n"); - else if (ieee80211_is_reassoc_req(fc)) - IWL_DEBUG_TX(priv, "Sending REASSOC frame\n"); -#endif - - /* drop all data frame if we are not associated */ - if (ieee80211_is_data(fc) && - (priv->iw_mode != NL80211_IFTYPE_MONITOR || - !(info->flags & IEEE80211_TX_CTL_INJECTED)) && /* packet injection */ - (!iwl_is_associated(priv) || - ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id) || - !priv->assoc_station_added)) { - IWL_DEBUG_DROP(priv, "Dropping - !iwl_is_associated\n"); - goto drop_unlock; - } - - spin_unlock_irqrestore(&priv->lock, flags); - - hdr_len = ieee80211_hdrlen(fc); - - /* Find (or create) index into station table for destination station */ - sta_id = iwl_get_sta_id(priv, hdr); - if (sta_id == IWL_INVALID_STATION) { - IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n", - hdr->addr1); - goto drop; - } - - IWL_DEBUG_TX(priv, "station Id %d\n", sta_id); - - swq_id = skb_get_queue_mapping(skb); - txq_id = swq_id; - if (ieee80211_is_data_qos(fc)) { - qc = ieee80211_get_qos_ctl(hdr); - tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; - seq_number = priv->stations[sta_id].tid[tid].seq_number; - seq_number &= IEEE80211_SCTL_SEQ; - hdr->seq_ctrl = hdr->seq_ctrl & - cpu_to_le16(IEEE80211_SCTL_FRAG); - hdr->seq_ctrl |= cpu_to_le16(seq_number); - seq_number += 0x10; - /* aggregation is on for this <sta,tid> */ - if (info->flags & IEEE80211_TX_CTL_AMPDU) { - txq_id = priv->stations[sta_id].tid[tid].agg.txq_id; - swq_id = iwl_virtual_agg_queue_num(swq_id, txq_id); - } - priv->stations[sta_id].tid[tid].tfds_in_queue++; - } - - txq = &priv->txq[txq_id]; - q = &txq->q; - txq->swq_id = swq_id; - - spin_lock_irqsave(&priv->lock, flags); - - /* Set up driver data for this TFD */ - memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info)); - txq->txb[q->write_ptr].skb[0] = skb; - - /* Set up first empty entry in queue's array of Tx/cmd buffers */ - out_cmd = txq->cmd[q->write_ptr]; - tx_cmd = &out_cmd->cmd.tx; - memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr)); - memset(tx_cmd, 0, sizeof(struct iwl_tx_cmd)); - - /* - * Set up the Tx-command (not MAC!) header. - * Store the chosen Tx queue and TFD index within the sequence field; - * after Tx, uCode's Tx response will return this value so driver can - * locate the frame within the tx queue and do post-tx processing. - */ - out_cmd->hdr.cmd = REPLY_TX; - out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) | - INDEX_TO_SEQ(q->write_ptr))); - - /* Copy MAC header from skb into command buffer */ - memcpy(tx_cmd->hdr, hdr, hdr_len); - - - /* Total # bytes to be transmitted */ - len = (u16)skb->len; - tx_cmd->len = cpu_to_le16(len); - - if (info->control.hw_key) - iwl_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb, sta_id); - - /* TODO need this for burst mode later on */ - iwl_tx_cmd_build_basic(priv, tx_cmd, info, hdr, sta_id); - - /* set is_hcca to 0; it probably will never be implemented */ - iwl_tx_cmd_build_rate(priv, tx_cmd, info, fc, sta_id, 0); - - iwl_update_tx_stats(priv, le16_to_cpu(fc), len); - - /* - * Use the first empty entry in this queue's command buffer array - * to contain the Tx command and MAC header concatenated together - * (payload data will be in another buffer). - * Size of this varies, due to varying MAC header length. - * If end is not dword aligned, we'll have 2 extra bytes at the end - * of the MAC header (device reads on dword boundaries). - * We'll tell device about this padding later. - */ - len = sizeof(struct iwl_tx_cmd) + - 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; - - /* Tell NIC about any 2-byte padding after MAC header */ - if (len_org) - tx_cmd->tx_flags |= TX_CMD_FLG_MH_PAD_MSK; - - /* Physical address of this Tx command's header (not MAC header!), - * within command buffer array. */ - txcmd_phys = pci_map_single(priv->pci_dev, - &out_cmd->hdr, len, - PCI_DMA_BIDIRECTIONAL); - pci_unmap_addr_set(&out_cmd->meta, mapping, txcmd_phys); - pci_unmap_len_set(&out_cmd->meta, len, len); - /* Add buffer containing Tx command and MAC(!) header to TFD's - * first entry */ - priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq, - txcmd_phys, len, 1, 0); - - if (!ieee80211_has_morefrags(hdr->frame_control)) { - txq->need_update = 1; - if (qc) - priv->stations[sta_id].tid[tid].seq_number = seq_number; - } else { - wait_write_ptr = 1; - txq->need_update = 0; - } - - /* Set up TFD's 2nd entry to point directly to remainder of skb, - * if any (802.11 null frames 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); - priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq, - phys_addr, len, - 0, 0); - } - - scratch_phys = txcmd_phys + sizeof(struct iwl_cmd_header) + - offsetof(struct iwl_tx_cmd, scratch); - - len = sizeof(struct iwl_tx_cmd) + - sizeof(struct iwl_cmd_header) + hdr_len; - /* take back ownership of DMA buffer to enable update */ - pci_dma_sync_single_for_cpu(priv->pci_dev, txcmd_phys, - len, PCI_DMA_BIDIRECTIONAL); - tx_cmd->dram_lsb_ptr = cpu_to_le32(scratch_phys); - tx_cmd->dram_msb_ptr = iwl_get_dma_hi_addr(scratch_phys); - - IWL_DEBUG_TX(priv, "sequence nr = 0X%x \n", - le16_to_cpu(out_cmd->hdr.sequence)); - IWL_DEBUG_TX(priv, "tx_flags = 0X%x \n", le32_to_cpu(tx_cmd->tx_flags)); - iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd, sizeof(*tx_cmd)); - iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr, hdr_len); - - /* Set up entry for this TFD in Tx byte-count array */ - priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, - le16_to_cpu(tx_cmd->len)); - - pci_dma_sync_single_for_device(priv->pci_dev, txcmd_phys, - len, PCI_DMA_BIDIRECTIONAL); - - /* Tell device the write index *just past* this latest filled TFD */ - q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd); - ret = iwl_txq_update_write_ptr(priv, txq); - spin_unlock_irqrestore(&priv->lock, flags); - - if (ret) - return ret; - - 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_txq_update_write_ptr(priv, txq); - spin_unlock_irqrestore(&priv->lock, flags); - } else { - iwl_stop_queue(priv, txq->swq_id); - } - } - - return 0; - -drop_unlock: - spin_unlock_irqrestore(&priv->lock, flags); -drop: - return -1; -} -EXPORT_SYMBOL(iwl_tx_skb); - -/*************** HOST COMMAND QUEUE FUNCTIONS *****/ - -/** - * 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. - */ -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_cmd *out_cmd; - dma_addr_t phys_addr; - unsigned long flags; - int len, ret; - u32 idx; - u16 fix_size; - - cmd->len = priv->cfg->ops->utils->get_hcmd_size(cmd->id, cmd->len); - fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr)); - - /* 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_is_rfkill(priv)) { - IWL_DEBUG_INFO(priv, "Not sending command - RF KILL"); - return -EIO; - } - - if (iwl_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) { - IWL_ERR(priv, "No space for Tx\n"); - return -ENOSPC; - } - - spin_lock_irqsave(&priv->hcmd_lock, flags); - - idx = get_cmd_index(q, q->write_ptr, 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->write_ptr)); - if (out_cmd->meta.flags & CMD_SIZE_HUGE) - out_cmd->hdr.sequence |= SEQ_HUGE_FRAME; - len = sizeof(struct iwl_cmd) - sizeof(struct iwl_cmd_meta); - len += (idx == TFD_CMD_SLOTS) ? IWL_MAX_SCAN_SIZE : 0; - - -#ifdef CONFIG_IWLWIFI_DEBUG - switch (out_cmd->hdr.cmd) { - case REPLY_TX_LINK_QUALITY_CMD: - case SENSITIVITY_CMD: - IWL_DEBUG_HC_DUMP(priv, "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->write_ptr, idx, IWL_CMD_QUEUE_NUM); - break; - default: - IWL_DEBUG_HC(priv, "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->write_ptr, idx, IWL_CMD_QUEUE_NUM); - } -#endif - txq->need_update = 1; - - if (priv->cfg->ops->lib->txq_update_byte_cnt_tbl) - /* Set up entry in queue's byte count circular buffer */ - priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, 0); - - phys_addr = pci_map_single(priv->pci_dev, &out_cmd->hdr, - fix_size, PCI_DMA_BIDIRECTIONAL); - pci_unmap_addr_set(&out_cmd->meta, mapping, phys_addr); - pci_unmap_len_set(&out_cmd->meta, len, fix_size); - - priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq, - phys_addr, fix_size, 1, - U32_PAD(cmd->len)); - - /* Increment and update queue's write index */ - q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd); - ret = iwl_txq_update_write_ptr(priv, txq); - - spin_unlock_irqrestore(&priv->hcmd_lock, flags); - return ret ? ret : idx; -} - -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; - struct iwl_tx_info *tx_info; - int nfreed = 0; - - if ((index >= q->n_bd) || (iwl_queue_used(q, index) == 0)) { - IWL_ERR(priv, "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->write_ptr, q->read_ptr); - return 0; - } - - for (index = iwl_queue_inc_wrap(index, q->n_bd); - q->read_ptr != index; - q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) { - - tx_info = &txq->txb[txq->q.read_ptr]; - ieee80211_tx_status_irqsafe(priv->hw, tx_info->skb[0]); - tx_info->skb[0] = NULL; - - if (priv->cfg->ops->lib->txq_inval_byte_cnt_tbl) - priv->cfg->ops->lib->txq_inval_byte_cnt_tbl(priv, txq); - - priv->cfg->ops->lib->txq_free_tfd(priv, txq); - nfreed++; - } - return nfreed; -} -EXPORT_SYMBOL(iwl_tx_queue_reclaim); - - -/** - * iwl_hcmd_queue_reclaim - Reclaim TX command queue entries already Tx'd - * - * 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 the stack that feeds us. - */ -static void iwl_hcmd_queue_reclaim(struct iwl_priv *priv, int txq_id, - int idx, int cmd_idx) -{ - struct iwl_tx_queue *txq = &priv->txq[txq_id]; - struct iwl_queue *q = &txq->q; - int nfreed = 0; - - if ((idx >= q->n_bd) || (iwl_queue_used(q, idx) == 0)) { - IWL_ERR(priv, "Read index for DMA queue txq id (%d), index %d, " - "is out of range [0-%d] %d %d.\n", txq_id, - idx, q->n_bd, q->write_ptr, q->read_ptr); - return; - } - - pci_unmap_single(priv->pci_dev, - pci_unmap_addr(&txq->cmd[cmd_idx]->meta, mapping), - pci_unmap_len(&txq->cmd[cmd_idx]->meta, len), - PCI_DMA_BIDIRECTIONAL); - - for (idx = iwl_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx; - q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) { - - if (nfreed++ > 0) { - IWL_ERR(priv, "HCMD skipped: index (%d) %d %d\n", idx, - q->write_ptr, q->read_ptr); - queue_work(priv->workqueue, &priv->restart); - } - - } -} - -/** - * 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 - */ -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 cmd_index; - bool huge = !!(pkt->hdr.sequence & SEQ_HUGE_FRAME); - 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 (WARN(txq_id != IWL_CMD_QUEUE_NUM, - "wrong command queue %d, sequence 0x%X readp=%d writep=%d\n", - txq_id, sequence, - priv->txq[IWL_CMD_QUEUE_NUM].q.read_ptr, - priv->txq[IWL_CMD_QUEUE_NUM].q.write_ptr)) { - iwl_print_hex_dump(priv, IWL_DL_INFO , rxb, 32); - return; - } - - 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_hcmd_queue_reclaim(priv, txq_id, index, cmd_index); - - if (!(cmd->meta.flags & CMD_ASYNC)) { - clear_bit(STATUS_HCMD_ACTIVE, &priv->status); - wake_up_interruptible(&priv->wait_command_queue); - } -} -EXPORT_SYMBOL(iwl_tx_cmd_complete); - -/* - * Find first available (lowest unused) Tx Queue, mark it "active". - * Called only when finding queue for aggregation. - * Should never return anything < 7, because they should already - * be in use as EDCA AC (0-3), Command (4), HCCA (5, 6). - */ -static int iwl_txq_ctx_activate_free(struct iwl_priv *priv) -{ - int txq_id; - - for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) - if (!test_and_set_bit(txq_id, &priv->txq_ctx_active_msk)) - return txq_id; - return -1; -} - -int iwl_tx_agg_start(struct iwl_priv *priv, const u8 *ra, u16 tid, u16 *ssn) -{ - int sta_id; - int tx_fifo; - int txq_id; - int ret; - unsigned long flags; - struct iwl_tid_data *tid_data; - - if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo))) - tx_fifo = default_tid_to_tx_fifo[tid]; - else - return -EINVAL; - - IWL_WARN(priv, "%s on ra = %pM tid = %d\n", - __func__, ra, tid); - - sta_id = iwl_find_station(priv, ra); - if (sta_id == IWL_INVALID_STATION) - return -ENXIO; - - if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_OFF) { - IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n"); - return -ENXIO; - } - - txq_id = iwl_txq_ctx_activate_free(priv); - if (txq_id == -1) - return -ENXIO; - - spin_lock_irqsave(&priv->sta_lock, flags); - tid_data = &priv->stations[sta_id].tid[tid]; - *ssn = SEQ_TO_SN(tid_data->seq_number); - tid_data->agg.txq_id = txq_id; - spin_unlock_irqrestore(&priv->sta_lock, flags); - - ret = priv->cfg->ops->lib->txq_agg_enable(priv, txq_id, tx_fifo, - sta_id, tid, *ssn); - if (ret) - return ret; - - if (tid_data->tfds_in_queue == 0) { - IWL_ERR(priv, "HW queue is empty\n"); - tid_data->agg.state = IWL_AGG_ON; - ieee80211_start_tx_ba_cb_irqsafe(priv->hw, ra, tid); - } else { - IWL_DEBUG_HT(priv, "HW queue is NOT empty: %d packets in HW queue\n", - tid_data->tfds_in_queue); - tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA; - } - return ret; -} -EXPORT_SYMBOL(iwl_tx_agg_start); - -int iwl_tx_agg_stop(struct iwl_priv *priv , const u8 *ra, u16 tid) -{ - int tx_fifo_id, txq_id, sta_id, ssn = -1; - struct iwl_tid_data *tid_data; - int ret, write_ptr, read_ptr; - unsigned long flags; - - if (!ra) { - IWL_ERR(priv, "ra = NULL\n"); - return -EINVAL; - } - - if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo))) - tx_fifo_id = default_tid_to_tx_fifo[tid]; - else - return -EINVAL; - - sta_id = iwl_find_station(priv, ra); - - if (sta_id == IWL_INVALID_STATION) { - IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid); - return -ENXIO; - } - - if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_ON) - IWL_WARN(priv, "Stopping AGG while state not IWL_AGG_ON\n"); - - tid_data = &priv->stations[sta_id].tid[tid]; - ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4; - txq_id = tid_data->agg.txq_id; - write_ptr = priv->txq[txq_id].q.write_ptr; - read_ptr = priv->txq[txq_id].q.read_ptr; - - /* The queue is not empty */ - if (write_ptr != read_ptr) { - IWL_DEBUG_HT(priv, "Stopping a non empty AGG HW QUEUE\n"); - priv->stations[sta_id].tid[tid].agg.state = - IWL_EMPTYING_HW_QUEUE_DELBA; - return 0; - } - - IWL_DEBUG_HT(priv, "HW queue is empty\n"); - priv->stations[sta_id].tid[tid].agg.state = IWL_AGG_OFF; - - spin_lock_irqsave(&priv->lock, flags); - ret = priv->cfg->ops->lib->txq_agg_disable(priv, txq_id, ssn, - tx_fifo_id); - spin_unlock_irqrestore(&priv->lock, flags); - - if (ret) - return ret; - - ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, ra, tid); - - return 0; -} -EXPORT_SYMBOL(iwl_tx_agg_stop); - -int iwl_txq_check_empty(struct iwl_priv *priv, int sta_id, u8 tid, int txq_id) -{ - struct iwl_queue *q = &priv->txq[txq_id].q; - u8 *addr = priv->stations[sta_id].sta.sta.addr; - struct iwl_tid_data *tid_data = &priv->stations[sta_id].tid[tid]; - - switch (priv->stations[sta_id].tid[tid].agg.state) { - case IWL_EMPTYING_HW_QUEUE_DELBA: - /* We are reclaiming the last packet of the */ - /* aggregated HW queue */ - if ((txq_id == tid_data->agg.txq_id) && - (q->read_ptr == q->write_ptr)) { - u16 ssn = SEQ_TO_SN(tid_data->seq_number); - int tx_fifo = default_tid_to_tx_fifo[tid]; - IWL_DEBUG_HT(priv, "HW queue empty: continue DELBA flow\n"); - priv->cfg->ops->lib->txq_agg_disable(priv, txq_id, - ssn, tx_fifo); - tid_data->agg.state = IWL_AGG_OFF; - ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, addr, tid); - } - break; - case IWL_EMPTYING_HW_QUEUE_ADDBA: - /* We are reclaiming the last packet of the queue */ - if (tid_data->tfds_in_queue == 0) { - IWL_DEBUG_HT(priv, "HW queue empty: continue ADDBA flow\n"); - tid_data->agg.state = IWL_AGG_ON; - ieee80211_start_tx_ba_cb_irqsafe(priv->hw, addr, tid); - } - break; - } - return 0; -} -EXPORT_SYMBOL(iwl_txq_check_empty); - -/** - * iwl_tx_status_reply_compressed_ba - Update tx status from block-ack - * - * Go through block-ack's bitmap of ACK'd frames, update driver's record of - * ACK vs. not. This gets sent to mac80211, then to rate scaling algo. - */ -static int iwl_tx_status_reply_compressed_ba(struct iwl_priv *priv, - struct iwl_ht_agg *agg, - struct iwl_compressed_ba_resp *ba_resp) - -{ - int i, sh, ack; - u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl); - u16 scd_flow = le16_to_cpu(ba_resp->scd_flow); - u64 bitmap; - int successes = 0; - struct ieee80211_tx_info *info; - - if (unlikely(!agg->wait_for_ba)) { - IWL_ERR(priv, "Received BA when not expected\n"); - return -EINVAL; - } - - /* Mark that the expected block-ack response arrived */ - agg->wait_for_ba = 0; - IWL_DEBUG_TX_REPLY(priv, "BA %d %d\n", agg->start_idx, ba_resp->seq_ctl); - - /* Calculate shift to align block-ack bits with our Tx window bits */ - sh = agg->start_idx - SEQ_TO_INDEX(seq_ctl >> 4); - if (sh < 0) /* tbw something is wrong with indices */ - sh += 0x100; - - /* don't use 64-bit values for now */ - bitmap = le64_to_cpu(ba_resp->bitmap) >> sh; - - if (agg->frame_count > (64 - sh)) { - IWL_DEBUG_TX_REPLY(priv, "more frames than bitmap size"); - return -1; - } - - /* check for success or failure according to the - * transmitted bitmap and block-ack bitmap */ - bitmap &= agg->bitmap; - - /* For each frame attempted in aggregation, - * update driver's record of tx frame's status. */ - for (i = 0; i < agg->frame_count ; i++) { - ack = bitmap & (1ULL << i); - successes += !!ack; - IWL_DEBUG_TX_REPLY(priv, "%s ON i=%d idx=%d raw=%d\n", - ack ? "ACK" : "NACK", i, (agg->start_idx + i) & 0xff, - agg->start_idx + i); - } - - info = IEEE80211_SKB_CB(priv->txq[scd_flow].txb[agg->start_idx].skb[0]); - memset(&info->status, 0, sizeof(info->status)); - info->flags = IEEE80211_TX_STAT_ACK; - info->flags |= IEEE80211_TX_STAT_AMPDU; - info->status.ampdu_ack_map = successes; - info->status.ampdu_ack_len = agg->frame_count; - iwl_hwrate_to_tx_control(priv, agg->rate_n_flags, info); - - IWL_DEBUG_TX_REPLY(priv, "Bitmap %llx\n", (unsigned long long)bitmap); - - return 0; -} - -/** - * iwl_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA - * - * Handles block-acknowledge notification from device, which reports success - * of frames sent via aggregation. - */ -void iwl_rx_reply_compressed_ba(struct iwl_priv *priv, - struct iwl_rx_mem_buffer *rxb) -{ - struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; - struct iwl_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba; - struct iwl_tx_queue *txq = NULL; - struct iwl_ht_agg *agg; - int index; - int sta_id; - int tid; - - /* "flow" corresponds to Tx queue */ - u16 scd_flow = le16_to_cpu(ba_resp->scd_flow); - - /* "ssn" is start of block-ack Tx window, corresponds to index - * (in Tx queue's circular buffer) of first TFD/frame in window */ - u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn); - - if (scd_flow >= priv->hw_params.max_txq_num) { - IWL_ERR(priv, - "BUG_ON scd_flow is bigger than number of queues\n"); - return; - } - - txq = &priv->txq[scd_flow]; - sta_id = ba_resp->sta_id; - tid = ba_resp->tid; - agg = &priv->stations[sta_id].tid[tid].agg; - - /* Find index just before block-ack window */ - index = iwl_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd); - - /* TODO: Need to get this copy more safely - now good for debug */ - - IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, " - "sta_id = %d\n", - agg->wait_for_ba, - (u8 *) &ba_resp->sta_addr_lo32, - ba_resp->sta_id); - IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = " - "%d, scd_ssn = %d\n", - ba_resp->tid, - ba_resp->seq_ctl, - (unsigned long long)le64_to_cpu(ba_resp->bitmap), - ba_resp->scd_flow, - ba_resp->scd_ssn); - IWL_DEBUG_TX_REPLY(priv, "DAT start_idx = %d, bitmap = 0x%llx \n", - agg->start_idx, - (unsigned long long)agg->bitmap); - - /* Update driver's record of ACK vs. not for each frame in window */ - iwl_tx_status_reply_compressed_ba(priv, agg, ba_resp); - - /* Release all TFDs before the SSN, i.e. all TFDs in front of - * block-ack window (we assume that they've been successfully - * transmitted ... if not, it's too late anyway). */ - if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) { - /* calculate mac80211 ampdu sw queue to wake */ - int freed = iwl_tx_queue_reclaim(priv, scd_flow, index); - priv->stations[sta_id].tid[tid].tfds_in_queue -= freed; - - if ((iwl_queue_space(&txq->q) > txq->q.low_mark) && - priv->mac80211_registered && - (agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)) - iwl_wake_queue(priv, txq->swq_id); - - iwl_txq_check_empty(priv, sta_id, tid, scd_flow); - } -} -EXPORT_SYMBOL(iwl_rx_reply_compressed_ba); - -#ifdef CONFIG_IWLWIFI_DEBUG -#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"; -} -EXPORT_SYMBOL(iwl_get_tx_fail_reason); -#endif /* CONFIG_IWLWIFI_DEBUG */ |