diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-agn-lib.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-agn-lib.c | 1504 |
1 files changed, 0 insertions, 1504 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-lib.c b/drivers/net/wireless/iwlwifi/iwl-agn-lib.c deleted file mode 100644 index 0f292a210ed..00000000000 --- a/drivers/net/wireless/iwlwifi/iwl-agn-lib.c +++ /dev/null @@ -1,1504 +0,0 @@ -/****************************************************************************** - * - * GPL LICENSE SUMMARY - * - * Copyright(c) 2008 - 2010 Intel Corporation. All rights reserved. - * - * 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.GPL. - * - * 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 <linux/kernel.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/sched.h> - -#include "iwl-dev.h" -#include "iwl-core.h" -#include "iwl-io.h" -#include "iwl-helpers.h" -#include "iwl-agn-hw.h" -#include "iwl-agn.h" -#include "iwl-sta.h" - -static inline u32 iwlagn_get_scd_ssn(struct iwl5000_tx_resp *tx_resp) -{ - return le32_to_cpup((__le32 *)&tx_resp->status + - tx_resp->frame_count) & MAX_SN; -} - -static int iwlagn_tx_status_reply_tx(struct iwl_priv *priv, - struct iwl_ht_agg *agg, - struct iwl5000_tx_resp *tx_resp, - int txq_id, u16 start_idx) -{ - u16 status; - struct agg_tx_status *frame_status = &tx_resp->status; - struct ieee80211_tx_info *info = NULL; - struct ieee80211_hdr *hdr = NULL; - u32 rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags); - int i, sh, idx; - u16 seq; - - if (agg->wait_for_ba) - IWL_DEBUG_TX_REPLY(priv, "got tx response w/o block-ack\n"); - - agg->frame_count = tx_resp->frame_count; - agg->start_idx = start_idx; - agg->rate_n_flags = rate_n_flags; - agg->bitmap = 0; - - /* # frames attempted by Tx command */ - if (agg->frame_count == 1) { - /* Only one frame was attempted; no block-ack will arrive */ - status = le16_to_cpu(frame_status[0].status); - idx = start_idx; - - /* FIXME: code repetition */ - IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, StartIdx=%d idx=%d\n", - agg->frame_count, agg->start_idx, idx); - - info = IEEE80211_SKB_CB(priv->txq[txq_id].txb[idx].skb[0]); - info->status.rates[0].count = tx_resp->failure_frame + 1; - info->flags &= ~IEEE80211_TX_CTL_AMPDU; - info->flags |= iwl_tx_status_to_mac80211(status); - iwlagn_hwrate_to_tx_control(priv, rate_n_flags, info); - - /* FIXME: code repetition end */ - - IWL_DEBUG_TX_REPLY(priv, "1 Frame 0x%x failure :%d\n", - status & 0xff, tx_resp->failure_frame); - IWL_DEBUG_TX_REPLY(priv, "Rate Info rate_n_flags=%x\n", rate_n_flags); - - agg->wait_for_ba = 0; - } else { - /* Two or more frames were attempted; expect block-ack */ - u64 bitmap = 0; - int start = agg->start_idx; - - /* Construct bit-map of pending frames within Tx window */ - for (i = 0; i < agg->frame_count; i++) { - u16 sc; - status = le16_to_cpu(frame_status[i].status); - seq = le16_to_cpu(frame_status[i].sequence); - idx = SEQ_TO_INDEX(seq); - txq_id = SEQ_TO_QUEUE(seq); - - if (status & (AGG_TX_STATE_FEW_BYTES_MSK | - AGG_TX_STATE_ABORT_MSK)) - continue; - - IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, txq_id=%d idx=%d\n", - agg->frame_count, txq_id, idx); - - hdr = iwl_tx_queue_get_hdr(priv, txq_id, idx); - if (!hdr) { - IWL_ERR(priv, - "BUG_ON idx doesn't point to valid skb" - " idx=%d, txq_id=%d\n", idx, txq_id); - return -1; - } - - sc = le16_to_cpu(hdr->seq_ctrl); - if (idx != (SEQ_TO_SN(sc) & 0xff)) { - IWL_ERR(priv, - "BUG_ON idx doesn't match seq control" - " idx=%d, seq_idx=%d, seq=%d\n", - idx, SEQ_TO_SN(sc), - hdr->seq_ctrl); - return -1; - } - - IWL_DEBUG_TX_REPLY(priv, "AGG Frame i=%d idx %d seq=%d\n", - i, idx, SEQ_TO_SN(sc)); - - sh = idx - start; - if (sh > 64) { - sh = (start - idx) + 0xff; - bitmap = bitmap << sh; - sh = 0; - start = idx; - } else if (sh < -64) - sh = 0xff - (start - idx); - else if (sh < 0) { - sh = start - idx; - start = idx; - bitmap = bitmap << sh; - sh = 0; - } - bitmap |= 1ULL << sh; - IWL_DEBUG_TX_REPLY(priv, "start=%d bitmap=0x%llx\n", - start, (unsigned long long)bitmap); - } - - agg->bitmap = bitmap; - agg->start_idx = start; - IWL_DEBUG_TX_REPLY(priv, "Frames %d start_idx=%d bitmap=0x%llx\n", - agg->frame_count, agg->start_idx, - (unsigned long long)agg->bitmap); - - if (bitmap) - agg->wait_for_ba = 1; - } - return 0; -} - -void iwl_check_abort_status(struct iwl_priv *priv, - u8 frame_count, u32 status) -{ - if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) { - IWL_ERR(priv, "TODO: Implement Tx flush command!!!\n"); - } -} - -static void iwlagn_rx_reply_tx(struct iwl_priv *priv, - struct iwl_rx_mem_buffer *rxb) -{ - struct iwl_rx_packet *pkt = rxb_addr(rxb); - 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_info *info; - struct iwl5000_tx_resp *tx_resp = (void *)&pkt->u.raw[0]; - u32 status = le16_to_cpu(tx_resp->status.status); - int tid; - int sta_id; - int freed; - - if ((index >= txq->q.n_bd) || (iwl_queue_used(&txq->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, txq->q.n_bd, txq->q.write_ptr, - txq->q.read_ptr); - return; - } - - info = IEEE80211_SKB_CB(txq->txb[txq->q.read_ptr].skb[0]); - memset(&info->status, 0, sizeof(info->status)); - - tid = (tx_resp->ra_tid & IWL50_TX_RES_TID_MSK) >> IWL50_TX_RES_TID_POS; - sta_id = (tx_resp->ra_tid & IWL50_TX_RES_RA_MSK) >> IWL50_TX_RES_RA_POS; - - if (txq->sched_retry) { - const u32 scd_ssn = iwlagn_get_scd_ssn(tx_resp); - struct iwl_ht_agg *agg = NULL; - - agg = &priv->stations[sta_id].tid[tid].agg; - - iwlagn_tx_status_reply_tx(priv, agg, tx_resp, txq_id, index); - - /* check if BAR is needed */ - if ((tx_resp->frame_count == 1) && !iwl_is_tx_success(status)) - info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; - - if (txq->q.read_ptr != (scd_ssn & 0xff)) { - index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd); - IWL_DEBUG_TX_REPLY(priv, "Retry scheduler reclaim " - "scd_ssn=%d idx=%d txq=%d swq=%d\n", - scd_ssn , index, txq_id, txq->swq_id); - - freed = iwlagn_tx_queue_reclaim(priv, txq_id, index); - iwl_free_tfds_in_queue(priv, sta_id, tid, freed); - - if (priv->mac80211_registered && - (iwl_queue_space(&txq->q) > txq->q.low_mark) && - (agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)) { - if (agg->state == IWL_AGG_OFF) - iwl_wake_queue(priv, txq_id); - else - iwl_wake_queue(priv, txq->swq_id); - } - } - } else { - BUG_ON(txq_id != txq->swq_id); - - info->status.rates[0].count = tx_resp->failure_frame + 1; - info->flags |= iwl_tx_status_to_mac80211(status); - iwlagn_hwrate_to_tx_control(priv, - le32_to_cpu(tx_resp->rate_n_flags), - info); - - IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x) rate_n_flags " - "0x%x retries %d\n", - txq_id, - iwl_get_tx_fail_reason(status), status, - le32_to_cpu(tx_resp->rate_n_flags), - tx_resp->failure_frame); - - freed = iwlagn_tx_queue_reclaim(priv, txq_id, index); - iwl_free_tfds_in_queue(priv, sta_id, tid, freed); - - if (priv->mac80211_registered && - (iwl_queue_space(&txq->q) > txq->q.low_mark)) - iwl_wake_queue(priv, txq_id); - } - - iwlagn_txq_check_empty(priv, sta_id, tid, txq_id); - - iwl_check_abort_status(priv, tx_resp->frame_count, status); -} - -void iwlagn_rx_handler_setup(struct iwl_priv *priv) -{ - /* init calibration handlers */ - priv->rx_handlers[CALIBRATION_RES_NOTIFICATION] = - iwlagn_rx_calib_result; - priv->rx_handlers[CALIBRATION_COMPLETE_NOTIFICATION] = - iwlagn_rx_calib_complete; - priv->rx_handlers[REPLY_TX] = iwlagn_rx_reply_tx; -} - -void iwlagn_setup_deferred_work(struct iwl_priv *priv) -{ - /* in agn, the tx power calibration is done in uCode */ - priv->disable_tx_power_cal = 1; -} - -int iwlagn_hw_valid_rtc_data_addr(u32 addr) -{ - return (addr >= IWLAGN_RTC_DATA_LOWER_BOUND) && - (addr < IWLAGN_RTC_DATA_UPPER_BOUND); -} - -int iwlagn_send_tx_power(struct iwl_priv *priv) -{ - struct iwl5000_tx_power_dbm_cmd tx_power_cmd; - u8 tx_ant_cfg_cmd; - - /* half dBm need to multiply */ - tx_power_cmd.global_lmt = (s8)(2 * priv->tx_power_user_lmt); - - if (priv->tx_power_lmt_in_half_dbm && - priv->tx_power_lmt_in_half_dbm < tx_power_cmd.global_lmt) { - /* - * For the newer devices which using enhanced/extend tx power - * table in EEPROM, the format is in half dBm. driver need to - * convert to dBm format before report to mac80211. - * By doing so, there is a possibility of 1/2 dBm resolution - * lost. driver will perform "round-up" operation before - * reporting, but it will cause 1/2 dBm tx power over the - * regulatory limit. Perform the checking here, if the - * "tx_power_user_lmt" is higher than EEPROM value (in - * half-dBm format), lower the tx power based on EEPROM - */ - tx_power_cmd.global_lmt = priv->tx_power_lmt_in_half_dbm; - } - tx_power_cmd.flags = IWL50_TX_POWER_NO_CLOSED; - tx_power_cmd.srv_chan_lmt = IWL50_TX_POWER_AUTO; - - if (IWL_UCODE_API(priv->ucode_ver) == 1) - tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD_V1; - else - tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD; - - return iwl_send_cmd_pdu_async(priv, tx_ant_cfg_cmd, - sizeof(tx_power_cmd), &tx_power_cmd, - NULL); -} - -void iwlagn_temperature(struct iwl_priv *priv) -{ - /* store temperature from statistics (in Celsius) */ - priv->temperature = le32_to_cpu(priv->statistics.general.temperature); - iwl_tt_handler(priv); -} - -u16 iwlagn_eeprom_calib_version(struct iwl_priv *priv) -{ - struct iwl_eeprom_calib_hdr { - u8 version; - u8 pa_type; - u16 voltage; - } *hdr; - - hdr = (struct iwl_eeprom_calib_hdr *)iwl_eeprom_query_addr(priv, - EEPROM_CALIB_ALL); - return hdr->version; - -} - -/* - * EEPROM - */ -static u32 eeprom_indirect_address(const struct iwl_priv *priv, u32 address) -{ - u16 offset = 0; - - if ((address & INDIRECT_ADDRESS) == 0) - return address; - - switch (address & INDIRECT_TYPE_MSK) { - case INDIRECT_HOST: - offset = iwl_eeprom_query16(priv, EEPROM_LINK_HOST); - break; - case INDIRECT_GENERAL: - offset = iwl_eeprom_query16(priv, EEPROM_LINK_GENERAL); - break; - case INDIRECT_REGULATORY: - offset = iwl_eeprom_query16(priv, EEPROM_LINK_REGULATORY); - break; - case INDIRECT_CALIBRATION: - offset = iwl_eeprom_query16(priv, EEPROM_LINK_CALIBRATION); - break; - case INDIRECT_PROCESS_ADJST: - offset = iwl_eeprom_query16(priv, EEPROM_LINK_PROCESS_ADJST); - break; - case INDIRECT_OTHERS: - offset = iwl_eeprom_query16(priv, EEPROM_LINK_OTHERS); - break; - default: - IWL_ERR(priv, "illegal indirect type: 0x%X\n", - address & INDIRECT_TYPE_MSK); - break; - } - - /* translate the offset from words to byte */ - return (address & ADDRESS_MSK) + (offset << 1); -} - -const u8 *iwlagn_eeprom_query_addr(const struct iwl_priv *priv, - size_t offset) -{ - u32 address = eeprom_indirect_address(priv, offset); - BUG_ON(address >= priv->cfg->eeprom_size); - return &priv->eeprom[address]; -} - -struct iwl_mod_params iwlagn_mod_params = { - .amsdu_size_8K = 1, - .restart_fw = 1, - /* the rest are 0 by default */ -}; - -void iwlagn_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].page != NULL) { - pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma, - PAGE_SIZE << priv->hw_params.rx_page_order, - PCI_DMA_FROMDEVICE); - __iwl_free_pages(priv, rxq->pool[i].page); - rxq->pool[i].page = NULL; - } - list_add_tail(&rxq->pool[i].list, &rxq->rx_used); - } - - for (i = 0; i < RX_QUEUE_SIZE; i++) - rxq->queue[i] = NULL; - - /* 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->write_actual = 0; - rxq->free_count = 0; - spin_unlock_irqrestore(&rxq->lock, flags); -} - -int iwlagn_rx_init(struct iwl_priv *priv, struct iwl_rx_queue *rxq) -{ - u32 rb_size; - const u32 rfdnlog = RX_QUEUE_SIZE_LOG; /* 256 RBDs */ - u32 rb_timeout = 0; /* FIXME: RX_RB_TIMEOUT for all devices? */ - - if (!priv->cfg->use_isr_legacy) - rb_timeout = RX_RB_TIMEOUT; - - if (priv->cfg->mod_params->amsdu_size_8K) - rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K; - else - rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K; - - /* Stop Rx DMA */ - iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0); - - /* Reset driver's Rx queue write index */ - iwl_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0); - - /* Tell device where to find RBD circular buffer in DRAM */ - iwl_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_BASE_REG, - (u32)(rxq->dma_addr >> 8)); - - /* Tell device where in DRAM to update its Rx status */ - iwl_write_direct32(priv, FH_RSCSR_CHNL0_STTS_WPTR_REG, - rxq->rb_stts_dma >> 4); - - /* Enable Rx DMA - * FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY is set because of HW bug in - * the credit mechanism in 5000 HW RX FIFO - * Direct rx interrupts to hosts - * Rx buffer size 4 or 8k - * RB timeout 0x10 - * 256 RBDs - */ - iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, - FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL | - FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY | - FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL | - FH_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK | - rb_size| - (rb_timeout << FH_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS)| - (rfdnlog << FH_RCSR_RX_CONFIG_RBDCB_SIZE_POS)); - - /* Set interrupt coalescing timer to default (2048 usecs) */ - iwl_write8(priv, CSR_INT_COALESCING, IWL_HOST_INT_TIMEOUT_DEF); - - return 0; -} - -int iwlagn_hw_nic_init(struct iwl_priv *priv) -{ - unsigned long flags; - struct iwl_rx_queue *rxq = &priv->rxq; - int ret; - - /* nic_init */ - spin_lock_irqsave(&priv->lock, flags); - priv->cfg->ops->lib->apm_ops.init(priv); - - /* Set interrupt coalescing calibration timer to default (512 usecs) */ - iwl_write8(priv, CSR_INT_COALESCING, IWL_HOST_INT_CALIB_TIMEOUT_DEF); - - spin_unlock_irqrestore(&priv->lock, flags); - - ret = priv->cfg->ops->lib->apm_ops.set_pwr_src(priv, IWL_PWR_SRC_VMAIN); - - priv->cfg->ops->lib->apm_ops.config(priv); - - /* Allocate the RX queue, or reset if it is already allocated */ - if (!rxq->bd) { - ret = iwl_rx_queue_alloc(priv); - if (ret) { - IWL_ERR(priv, "Unable to initialize Rx queue\n"); - return -ENOMEM; - } - } else - iwlagn_rx_queue_reset(priv, rxq); - - iwlagn_rx_replenish(priv); - - iwlagn_rx_init(priv, rxq); - - spin_lock_irqsave(&priv->lock, flags); - - rxq->need_update = 1; - iwl_rx_queue_update_write_ptr(priv, rxq); - - spin_unlock_irqrestore(&priv->lock, flags); - - /* Allocate or reset and init all Tx and Command queues */ - if (!priv->txq) { - ret = iwlagn_txq_ctx_alloc(priv); - if (ret) - return ret; - } else - iwlagn_txq_ctx_reset(priv); - - set_bit(STATUS_INIT, &priv->status); - - return 0; -} - -/** - * iwlagn_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr - */ -static inline __le32 iwlagn_dma_addr2rbd_ptr(struct iwl_priv *priv, - dma_addr_t dma_addr) -{ - return cpu_to_le32((u32)(dma_addr >> 8)); -} - -/** - * iwlagn_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. - */ -void iwlagn_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; - - spin_lock_irqsave(&rxq->lock, flags); - while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) { - /* The overwritten rxb must be a used one */ - rxb = rxq->queue[rxq->write]; - BUG_ON(rxb && rxb->page); - - /* Get next free Rx buffer, remove from free list */ - element = rxq->rx_free.next; - rxb = list_entry(element, struct iwl_rx_mem_buffer, list); - list_del(element); - - /* Point to Rx buffer via next RBD in circular buffer */ - rxq->bd[rxq->write] = iwlagn_dma_addr2rbd_ptr(priv, - rxb->page_dma); - 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. - * Increment device's write pointer in multiples of 8. */ - if (rxq->write_actual != (rxq->write & ~0x7)) { - spin_lock_irqsave(&rxq->lock, flags); - rxq->need_update = 1; - spin_unlock_irqrestore(&rxq->lock, flags); - iwl_rx_queue_update_write_ptr(priv, rxq); - } -} - -/** - * iwlagn_rx_replenish - 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 initialization) - */ -void iwlagn_rx_allocate(struct iwl_priv *priv, gfp_t priority) -{ - struct iwl_rx_queue *rxq = &priv->rxq; - struct list_head *element; - struct iwl_rx_mem_buffer *rxb; - struct page *page; - unsigned long flags; - gfp_t gfp_mask = priority; - - while (1) { - spin_lock_irqsave(&rxq->lock, flags); - if (list_empty(&rxq->rx_used)) { - spin_unlock_irqrestore(&rxq->lock, flags); - return; - } - spin_unlock_irqrestore(&rxq->lock, flags); - - if (rxq->free_count > RX_LOW_WATERMARK) - gfp_mask |= __GFP_NOWARN; - - if (priv->hw_params.rx_page_order > 0) - gfp_mask |= __GFP_COMP; - - /* Alloc a new receive buffer */ - page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order); - if (!page) { - if (net_ratelimit()) - IWL_DEBUG_INFO(priv, "alloc_pages failed, " - "order: %d\n", - priv->hw_params.rx_page_order); - - if ((rxq->free_count <= RX_LOW_WATERMARK) && - net_ratelimit()) - IWL_CRIT(priv, "Failed to alloc_pages with %s. Only %u free buffers remaining.\n", - priority == GFP_ATOMIC ? "GFP_ATOMIC" : "GFP_KERNEL", - rxq->free_count); - /* We don't reschedule replenish work here -- we will - * call the restock method and if it still needs - * more buffers it will schedule replenish */ - return; - } - - spin_lock_irqsave(&rxq->lock, flags); - - if (list_empty(&rxq->rx_used)) { - spin_unlock_irqrestore(&rxq->lock, flags); - __free_pages(page, priv->hw_params.rx_page_order); - return; - } - element = rxq->rx_used.next; - rxb = list_entry(element, struct iwl_rx_mem_buffer, list); - list_del(element); - - spin_unlock_irqrestore(&rxq->lock, flags); - - BUG_ON(rxb->page); - rxb->page = page; - /* Get physical address of the RB */ - rxb->page_dma = pci_map_page(priv->pci_dev, page, 0, - PAGE_SIZE << priv->hw_params.rx_page_order, - PCI_DMA_FROMDEVICE); - /* dma address must be no more than 36 bits */ - BUG_ON(rxb->page_dma & ~DMA_BIT_MASK(36)); - /* and also 256 byte aligned! */ - BUG_ON(rxb->page_dma & DMA_BIT_MASK(8)); - - spin_lock_irqsave(&rxq->lock, flags); - - list_add_tail(&rxb->list, &rxq->rx_free); - rxq->free_count++; - priv->alloc_rxb_page++; - - spin_unlock_irqrestore(&rxq->lock, flags); - } -} - -void iwlagn_rx_replenish(struct iwl_priv *priv) -{ - unsigned long flags; - - iwlagn_rx_allocate(priv, GFP_KERNEL); - - spin_lock_irqsave(&priv->lock, flags); - iwlagn_rx_queue_restock(priv); - spin_unlock_irqrestore(&priv->lock, flags); -} - -void iwlagn_rx_replenish_now(struct iwl_priv *priv) -{ - iwlagn_rx_allocate(priv, GFP_ATOMIC); - - iwlagn_rx_queue_restock(priv); -} - -/* Assumes that the skb field of the buffers in 'pool' is kept accurate. - * If an SKB has been detached, the POOL needs to have its 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 iwlagn_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].page != NULL) { - pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma, - PAGE_SIZE << priv->hw_params.rx_page_order, - PCI_DMA_FROMDEVICE); - __iwl_free_pages(priv, rxq->pool[i].page); - rxq->pool[i].page = NULL; - } - } - - dma_free_coherent(&priv->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd, - rxq->dma_addr); - dma_free_coherent(&priv->pci_dev->dev, sizeof(struct iwl_rb_status), - rxq->rb_stts, rxq->rb_stts_dma); - rxq->bd = NULL; - rxq->rb_stts = NULL; -} - -int iwlagn_rxq_stop(struct iwl_priv *priv) -{ - - /* stop Rx DMA */ - iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0); - iwl_poll_direct_bit(priv, FH_MEM_RSSR_RX_STATUS_REG, - FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 1000); - - return 0; -} - -int iwlagn_hwrate_to_mac80211_idx(u32 rate_n_flags, enum ieee80211_band band) -{ - int idx = 0; - int band_offset = 0; - - /* HT rate format: mac80211 wants an MCS number, which is just LSB */ - if (rate_n_flags & RATE_MCS_HT_MSK) { - idx = (rate_n_flags & 0xff); - return idx; - /* Legacy rate format, search for match in table */ - } else { - if (band == IEEE80211_BAND_5GHZ) - band_offset = IWL_FIRST_OFDM_RATE; - for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++) - if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF)) - return idx - band_offset; - } - - return -1; -} - -/* Calc max signal level (dBm) among 3 possible receivers */ -static inline int iwlagn_calc_rssi(struct iwl_priv *priv, - struct iwl_rx_phy_res *rx_resp) -{ - return priv->cfg->ops->utils->calc_rssi(priv, rx_resp); -} - -#ifdef CONFIG_IWLWIFI_DEBUG -/** - * iwlagn_dbg_report_frame - dump frame to syslog during debug sessions - * - * You may 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 data frames. - * All beacon and probe response frames are printed. - */ -static void iwlagn_dbg_report_frame(struct iwl_priv *priv, - struct iwl_rx_phy_res *phy_res, u16 length, - 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; - __le16 fc; - u16 seq_ctl; - u16 channel; - u16 phy_flags; - u32 rate_n_flags; - u32 tsf_low; - int rssi; - - if (likely(!(iwl_get_debug_level(priv) & IWL_DL_RX))) - return; - - /* MAC header */ - fc = header->frame_control; - seq_ctl = le16_to_cpu(header->seq_ctrl); - - /* metadata */ - channel = le16_to_cpu(phy_res->channel); - phy_flags = le16_to_cpu(phy_res->phy_flags); - rate_n_flags = le32_to_cpu(phy_res->rate_n_flags); - - /* signal statistics */ - rssi = iwlagn_calc_rssi(priv, phy_res); - tsf_low = le64_to_cpu(phy_res->timestamp) & 0x0ffffffff; - - 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 & ~cpu_to_le16(IEEE80211_FCTL_PROTECTED)) == - cpu_to_le16(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; - int rate_idx; - u32 bitrate; - - if (hundred) - title = "100Frames"; - else if (ieee80211_has_retry(fc)) - title = "Retry"; - else if (ieee80211_is_assoc_resp(fc)) - title = "AscRsp"; - else if (ieee80211_is_reassoc_resp(fc)) - title = "RasRsp"; - else if (ieee80211_is_probe_resp(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_idx = iwl_hwrate_to_plcp_idx(rate_n_flags); - if (unlikely((rate_idx < 0) || (rate_idx >= IWL_RATE_COUNT))) { - bitrate = 0; - WARN_ON_ONCE(1); - } else { - bitrate = iwl_rates[rate_idx].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(priv, "%s: mhd=0x%04x, dst=0x%02x, " - "len=%u, rssi=%d, chnl=%d, rate=%u,\n", - title, le16_to_cpu(fc), header->addr1[5], - length, rssi, channel, bitrate); - else { - /* src/dst addresses assume managed mode */ - IWL_DEBUG_RX(priv, "%s: 0x%04x, dst=0x%02x, src=0x%02x, " - "len=%u, rssi=%d, tim=%lu usec, " - "phy=0x%02x, chnl=%d\n", - title, le16_to_cpu(fc), header->addr1[5], - header->addr3[5], length, rssi, - tsf_low - priv->scan_start_tsf, - phy_flags, channel); - } - } - if (print_dump) - iwl_print_hex_dump(priv, IWL_DL_RX, header, length); -} -#endif - -static u32 iwlagn_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in) -{ - u32 decrypt_out = 0; - - if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) == - RX_RES_STATUS_STATION_FOUND) - decrypt_out |= (RX_RES_STATUS_STATION_FOUND | - RX_RES_STATUS_NO_STATION_INFO_MISMATCH); - - decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK); - - /* packet was not encrypted */ - if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) == - RX_RES_STATUS_SEC_TYPE_NONE) - return decrypt_out; - - /* packet was encrypted with unknown alg */ - if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) == - RX_RES_STATUS_SEC_TYPE_ERR) - return decrypt_out; - - /* decryption was not done in HW */ - if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) != - RX_MPDU_RES_STATUS_DEC_DONE_MSK) - return decrypt_out; - - switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) { - - case RX_RES_STATUS_SEC_TYPE_CCMP: - /* alg is CCM: check MIC only */ - if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK)) - /* Bad MIC */ - decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC; - else - decrypt_out |= RX_RES_STATUS_DECRYPT_OK; - - break; - - case RX_RES_STATUS_SEC_TYPE_TKIP: - if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) { - /* Bad TTAK */ - decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK; - break; - } - /* fall through if TTAK OK */ - default: - if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK)) - decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC; - else - decrypt_out |= RX_RES_STATUS_DECRYPT_OK; - break; - } - - IWL_DEBUG_RX(priv, "decrypt_in:0x%x decrypt_out = 0x%x\n", - decrypt_in, decrypt_out); - - return decrypt_out; -} - -static void iwlagn_pass_packet_to_mac80211(struct iwl_priv *priv, - struct ieee80211_hdr *hdr, - u16 len, - u32 ampdu_status, - struct iwl_rx_mem_buffer *rxb, - struct ieee80211_rx_status *stats) -{ - struct sk_buff *skb; - __le16 fc = hdr->frame_control; - - /* We only process data packets if the interface is open */ - if (unlikely(!priv->is_open)) { - IWL_DEBUG_DROP_LIMIT(priv, - "Dropping packet while interface is not open.\n"); - return; - } - - /* In case of HW accelerated crypto and bad decryption, drop */ - if (!priv->cfg->mod_params->sw_crypto && - iwl_set_decrypted_flag(priv, hdr, ampdu_status, stats)) - return; - - skb = dev_alloc_skb(128); - if (!skb) { - IWL_ERR(priv, "dev_alloc_skb failed\n"); - return; - } - - skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb), len); - - iwl_update_stats(priv, false, fc, len); - memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats)); - - ieee80211_rx(priv->hw, skb); - priv->alloc_rxb_page--; - rxb->page = NULL; -} - -/* Called for REPLY_RX (legacy ABG frames), or - * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */ -void iwlagn_rx_reply_rx(struct iwl_priv *priv, - struct iwl_rx_mem_buffer *rxb) -{ - struct ieee80211_hdr *header; - struct ieee80211_rx_status rx_status; - struct iwl_rx_packet *pkt = rxb_addr(rxb); - struct iwl_rx_phy_res *phy_res; - __le32 rx_pkt_status; - struct iwl4965_rx_mpdu_res_start *amsdu; - u32 len; - u32 ampdu_status; - u32 rate_n_flags; - - /** - * REPLY_RX and REPLY_RX_MPDU_CMD are handled differently. - * REPLY_RX: physical layer info is in this buffer - * REPLY_RX_MPDU_CMD: physical layer info was sent in separate - * command and cached in priv->last_phy_res - * - * Here we set up local variables depending on which command is - * received. - */ - if (pkt->hdr.cmd == REPLY_RX) { - phy_res = (struct iwl_rx_phy_res *)pkt->u.raw; - header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*phy_res) - + phy_res->cfg_phy_cnt); - - len = le16_to_cpu(phy_res->byte_count); - rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*phy_res) + - phy_res->cfg_phy_cnt + len); - ampdu_status = le32_to_cpu(rx_pkt_status); - } else { - if (!priv->_agn.last_phy_res_valid) { - IWL_ERR(priv, "MPDU frame without cached PHY data\n"); - return; - } - phy_res = &priv->_agn.last_phy_res; - amsdu = (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw; - header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*amsdu)); - len = le16_to_cpu(amsdu->byte_count); - rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*amsdu) + len); - ampdu_status = iwlagn_translate_rx_status(priv, - le32_to_cpu(rx_pkt_status)); - } - - if ((unlikely(phy_res->cfg_phy_cnt > 20))) { - IWL_DEBUG_DROP(priv, "dsp size out of range [0,20]: %d/n", - phy_res->cfg_phy_cnt); - return; - } - - if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) || - !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) { - IWL_DEBUG_RX(priv, "Bad CRC or FIFO: 0x%08X.\n", - le32_to_cpu(rx_pkt_status)); - return; - } - - /* This will be used in several places later */ - rate_n_flags = le32_to_cpu(phy_res->rate_n_flags); - - /* rx_status carries information about the packet to mac80211 */ - rx_status.mactime = le64_to_cpu(phy_res->timestamp); - rx_status.freq = - ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel)); - rx_status.band = (phy_res->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ? - IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ; - rx_status.rate_idx = - iwlagn_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band); - rx_status.flag = 0; - - /* TSF isn't reliable. In order to allow smooth user experience, - * this W/A doesn't propagate it to the mac80211 */ - /*rx_status.flag |= RX_FLAG_TSFT;*/ - - priv->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp); - - /* Find max signal strength (dBm) among 3 antenna/receiver chains */ - rx_status.signal = iwlagn_calc_rssi(priv, phy_res); - -#ifdef CONFIG_IWLWIFI_DEBUG - /* Set "1" to report good data frames in groups of 100 */ - if (unlikely(iwl_get_debug_level(priv) & IWL_DL_RX)) - iwlagn_dbg_report_frame(priv, phy_res, len, header, 1); -#endif - iwl_dbg_log_rx_data_frame(priv, len, header); - IWL_DEBUG_STATS_LIMIT(priv, "Rssi %d, TSF %llu\n", - rx_status.signal, (unsigned long long)rx_status.mactime); - - /* - * "antenna number" - * - * It seems that the antenna field in the phy flags value - * is actually a bit field. This is undefined by radiotap, - * it wants an actual antenna number but I always get "7" - * for most legacy frames I receive indicating that the - * same frame was received on all three RX chains. - * - * I think this field should be removed in favor of a - * new 802.11n radiotap field "RX chains" that is defined - * as a bitmask. - */ - rx_status.antenna = - (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK) - >> RX_RES_PHY_FLAGS_ANTENNA_POS; - - /* set the preamble flag if appropriate */ - if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK) - rx_status.flag |= RX_FLAG_SHORTPRE; - - /* Set up the HT phy flags */ - if (rate_n_flags & RATE_MCS_HT_MSK) - rx_status.flag |= RX_FLAG_HT; - if (rate_n_flags & RATE_MCS_HT40_MSK) - rx_status.flag |= RX_FLAG_40MHZ; - if (rate_n_flags & RATE_MCS_SGI_MSK) - rx_status.flag |= RX_FLAG_SHORT_GI; - - iwlagn_pass_packet_to_mac80211(priv, header, len, ampdu_status, - rxb, &rx_status); -} - -/* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD). - * This will be used later in iwl_rx_reply_rx() for REPLY_RX_MPDU_CMD. */ -void iwlagn_rx_reply_rx_phy(struct iwl_priv *priv, - struct iwl_rx_mem_buffer *rxb) -{ - struct iwl_rx_packet *pkt = rxb_addr(rxb); - priv->_agn.last_phy_res_valid = true; - memcpy(&priv->_agn.last_phy_res, pkt->u.raw, - sizeof(struct iwl_rx_phy_res)); -} - -static int iwl_get_single_channel_for_scan(struct iwl_priv *priv, - struct ieee80211_vif *vif, - enum ieee80211_band band, - struct iwl_scan_channel *scan_ch) -{ - const struct ieee80211_supported_band *sband; - u16 passive_dwell = 0; - u16 active_dwell = 0; - int added = 0; - u16 channel = 0; - - sband = iwl_get_hw_mode(priv, band); - if (!sband) { - IWL_ERR(priv, "invalid band\n"); - return added; - } - - active_dwell = iwl_get_active_dwell_time(priv, band, 0); - passive_dwell = iwl_get_passive_dwell_time(priv, band, vif); - - if (passive_dwell <= active_dwell) - passive_dwell = active_dwell + 1; - - channel = iwl_get_single_channel_number(priv, band); - if (channel) { - scan_ch->channel = cpu_to_le16(channel); - scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE; - scan_ch->active_dwell = cpu_to_le16(active_dwell); - scan_ch->passive_dwell = cpu_to_le16(passive_dwell); - /* Set txpower levels to defaults */ - scan_ch->dsp_atten = 110; - if (band == IEEE80211_BAND_5GHZ) - scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3; - else - scan_ch->tx_gain = ((1 << 5) | (5 << 3)); - added++; - } else - IWL_ERR(priv, "no valid channel found\n"); - return added; -} - -static int iwl_get_channels_for_scan(struct iwl_priv *priv, - struct ieee80211_vif *vif, - enum ieee80211_band band, - u8 is_active, u8 n_probes, - struct iwl_scan_channel *scan_ch) -{ - struct ieee80211_channel *chan; - const struct ieee80211_supported_band *sband; - const struct iwl_channel_info *ch_info; - u16 passive_dwell = 0; - u16 active_dwell = 0; - int added, i; - u16 channel; - - sband = iwl_get_hw_mode(priv, band); - if (!sband) - return 0; - - active_dwell = iwl_get_active_dwell_time(priv, band, n_probes); - passive_dwell = iwl_get_passive_dwell_time(priv, band, vif); - - if (passive_dwell <= active_dwell) - passive_dwell = active_dwell + 1; - - for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) { - chan = priv->scan_request->channels[i]; - - if (chan->band != band) - continue; - - channel = ieee80211_frequency_to_channel(chan->center_freq); - scan_ch->channel = cpu_to_le16(channel); - - ch_info = iwl_get_channel_info(priv, band, channel); - if (!is_channel_valid(ch_info)) { - IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n", - channel); - continue; - } - - if (!is_active || is_channel_passive(ch_info) || - (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) - scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE; - else - scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE; - - if (n_probes) - scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes); - - scan_ch->active_dwell = cpu_to_le16(active_dwell); - scan_ch->passive_dwell = cpu_to_le16(passive_dwell); - - /* Set txpower levels to defaults */ - scan_ch->dsp_atten = 110; - - /* NOTE: if we were doing 6Mb OFDM for scans we'd use - * power level: - * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3; - */ - if (band == IEEE80211_BAND_5GHZ) - scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3; - else - scan_ch->tx_gain = ((1 << 5) | (5 << 3)); - - IWL_DEBUG_SCAN(priv, "Scanning ch=%d prob=0x%X [%s %d]\n", - channel, le32_to_cpu(scan_ch->type), - (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ? - "ACTIVE" : "PASSIVE", - (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ? - active_dwell : passive_dwell); - - scan_ch++; - added++; - } - - IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added); - return added; -} - -void iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif) -{ - struct iwl_host_cmd cmd = { - .id = REPLY_SCAN_CMD, - .len = sizeof(struct iwl_scan_cmd), - .flags = CMD_SIZE_HUGE, - }; - struct iwl_scan_cmd *scan; - struct ieee80211_conf *conf = NULL; - u32 rate_flags = 0; - u16 cmd_len; - u16 rx_chain = 0; - enum ieee80211_band band; - u8 n_probes = 0; - u8 rx_ant = priv->hw_params.valid_rx_ant; - u8 rate; - bool is_active = false; - int chan_mod; - u8 active_chains; - - conf = ieee80211_get_hw_conf(priv->hw); - - cancel_delayed_work(&priv->scan_check); - - if (!iwl_is_ready(priv)) { - IWL_WARN(priv, "request scan called when driver not ready.\n"); - goto done; - } - - /* Make sure the scan wasn't canceled 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(priv, "Multiple concurrent scan requests in parallel. " - "Ignoring second request.\n"); - goto done; - } - - if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { - IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n"); - goto done; - } - - if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) { - IWL_DEBUG_HC(priv, "Scan request while abort pending. Queuing.\n"); - goto done; - } - - if (iwl_is_rfkill(priv)) { - IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n"); - goto done; - } - - if (!test_bit(STATUS_READY, &priv->status)) { - IWL_DEBUG_HC(priv, "Scan request while uninitialized. Queuing.\n"); - goto done; - } - - if (!priv->scan_cmd) { - priv->scan_cmd = kmalloc(sizeof(struct iwl_scan_cmd) + - IWL_MAX_SCAN_SIZE, GFP_KERNEL); - if (!priv->scan_cmd) { - IWL_DEBUG_SCAN(priv, - "fail to allocate memory for scan\n"); - goto done; - } - } - scan = priv->scan_cmd; - 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(priv, "Scanning while associated...\n"); - spin_lock_irqsave(&priv->lock, flags); - interval = vif ? vif->bss_conf.beacon_int : 0; - spin_unlock_irqrestore(&priv->lock, flags); - - scan->suspend_time = 0; - scan->max_out_time = cpu_to_le32(200 * 1024); - if (!interval) - interval = suspend_time; - - extra = (suspend_time / interval) << 22; - scan_suspend_time = (extra | - ((suspend_time % interval) * 1024)); - scan->suspend_time = cpu_to_le32(scan_suspend_time); - IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n", - scan_suspend_time, interval); - } - - if (priv->is_internal_short_scan) { - IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n"); - } else if (priv->scan_request->n_ssids) { - int i, p = 0; - IWL_DEBUG_SCAN(priv, "Kicking off active scan\n"); - for (i = 0; i < priv->scan_request->n_ssids; i++) { - /* always does wildcard anyway */ - if (!priv->scan_request->ssids[i].ssid_len) - continue; - scan->direct_scan[p].id = WLAN_EID_SSID; - scan->direct_scan[p].len = - priv->scan_request->ssids[i].ssid_len; - memcpy(scan->direct_scan[p].ssid, - priv->scan_request->ssids[i].ssid, - priv->scan_request->ssids[i].ssid_len); - n_probes++; - p++; - } - is_active = true; - } else - IWL_DEBUG_SCAN(priv, "Start passive scan.\n"); - - scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK; - scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id; - scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; - - switch (priv->scan_band) { - case IEEE80211_BAND_2GHZ: - scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK; - chan_mod = le32_to_cpu(priv->active_rxon.flags & RXON_FLG_CHANNEL_MODE_MSK) - >> RXON_FLG_CHANNEL_MODE_POS; - if (chan_mod == CHANNEL_MODE_PURE_40) { - rate = IWL_RATE_6M_PLCP; - } else { - rate = IWL_RATE_1M_PLCP; - rate_flags = RATE_MCS_CCK_MSK; - } - scan->good_CRC_th = IWL_GOOD_CRC_TH_DISABLED; - break; - case IEEE80211_BAND_5GHZ: - rate = IWL_RATE_6M_PLCP; - /* - * If active scanning is requested but a certain channel is - * marked passive, we can do active scanning if we detect - * transmissions. - * - * There is an issue with some firmware versions that triggers - * a sysassert on a "good CRC threshold" of zero (== disabled), - * on a radar channel even though this means that we should NOT - * send probes. - * - * The "good CRC threshold" is the number of frames that we - * need to receive during our dwell time on a channel before - * sending out probes -- setting this to a huge value will - * mean we never reach it, but at the same time work around - * the aforementioned issue. Thus use IWL_GOOD_CRC_TH_NEVER - * here instead of IWL_GOOD_CRC_TH_DISABLED. - */ - scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT : - IWL_GOOD_CRC_TH_NEVER; - break; - default: - IWL_WARN(priv, "Invalid scan band count\n"); - goto done; - } - - band = priv->scan_band; - - if (priv->cfg->scan_antennas[band]) - rx_ant = priv->cfg->scan_antennas[band]; - - priv->scan_tx_ant[band] = - iwl_toggle_tx_ant(priv, priv->scan_tx_ant[band]); - rate_flags |= iwl_ant_idx_to_flags(priv->scan_tx_ant[band]); - scan->tx_cmd.rate_n_flags = iwl_hw_set_rate_n_flags(rate, rate_flags); - - /* In power save mode use one chain, otherwise use all chains */ - if (test_bit(STATUS_POWER_PMI, &priv->status)) { - /* rx_ant has been set to all valid chains previously */ - active_chains = rx_ant & - ((u8)(priv->chain_noise_data.active_chains)); - if (!active_chains) - active_chains = rx_ant; - - IWL_DEBUG_SCAN(priv, "chain_noise_data.active_chains: %u\n", - priv->chain_noise_data.active_chains); - - rx_ant = first_antenna(active_chains); - } - /* MIMO is not used here, but value is required */ - rx_chain |= priv->hw_params.valid_rx_ant << RXON_RX_CHAIN_VALID_POS; - rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS; - rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS; - rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS; - scan->rx_chain = cpu_to_le16(rx_chain); - if (!priv->is_internal_short_scan) { - cmd_len = iwl_fill_probe_req(priv, - (struct ieee80211_mgmt *)scan->data, - priv->scan_request->ie, - priv->scan_request->ie_len, - IWL_MAX_SCAN_SIZE - sizeof(*scan)); - } else { - cmd_len = iwl_fill_probe_req(priv, - (struct ieee80211_mgmt *)scan->data, - NULL, 0, - IWL_MAX_SCAN_SIZE - sizeof(*scan)); - - } - scan->tx_cmd.len = cpu_to_le16(cmd_len); - - scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK | - RXON_FILTER_BCON_AWARE_MSK); - - if (priv->is_internal_short_scan) { - scan->channel_count = - iwl_get_single_channel_for_scan(priv, vif, band, - (void *)&scan->data[le16_to_cpu( - scan->tx_cmd.len)]); - } else { - scan->channel_count = - iwl_get_channels_for_scan(priv, vif, band, - is_active, n_probes, - (void *)&scan->data[le16_to_cpu( - scan->tx_cmd.len)]); - } - if (scan->channel_count == 0) { - IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count); - goto done; - } - - 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); - if (iwl_send_cmd_sync(priv, &cmd)) - goto done; - - queue_delayed_work(priv->workqueue, &priv->scan_check, - IWL_SCAN_CHECK_WATCHDOG); - - return; - - done: - /* Cannot perform scan. Make sure we clear scanning - * bits from status so next scan request can be performed. - * If we don't clear scanning status bit here all next scan - * will fail - */ - clear_bit(STATUS_SCAN_HW, &priv->status); - clear_bit(STATUS_SCANNING, &priv->status); - /* inform mac80211 scan aborted */ - queue_work(priv->workqueue, &priv->scan_completed); -} - -int iwlagn_manage_ibss_station(struct iwl_priv *priv, - struct ieee80211_vif *vif, bool add) -{ - struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; - - if (add) - return iwl_add_bssid_station(priv, vif->bss_conf.bssid, true, - &vif_priv->ibss_bssid_sta_id); - return iwl_remove_station(priv, vif_priv->ibss_bssid_sta_id, - vif->bss_conf.bssid); -} |