/****************************************************************************** * * GPL LICENSE SUMMARY * * Copyright(c) 2008 - 2011 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 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 * *****************************************************************************/ #include #include #include #include #include #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 iwlagn_tx_resp *tx_resp) { return le32_to_cpup((__le32 *)&tx_resp->status + tx_resp->frame_count) & MAX_SN; } static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status) { status &= TX_STATUS_MSK; switch (status) { case TX_STATUS_POSTPONE_DELAY: priv->_agn.reply_tx_stats.pp_delay++; break; case TX_STATUS_POSTPONE_FEW_BYTES: priv->_agn.reply_tx_stats.pp_few_bytes++; break; case TX_STATUS_POSTPONE_BT_PRIO: priv->_agn.reply_tx_stats.pp_bt_prio++; break; case TX_STATUS_POSTPONE_QUIET_PERIOD: priv->_agn.reply_tx_stats.pp_quiet_period++; break; case TX_STATUS_POSTPONE_CALC_TTAK: priv->_agn.reply_tx_stats.pp_calc_ttak++; break; case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY: priv->_agn.reply_tx_stats.int_crossed_retry++; break; case TX_STATUS_FAIL_SHORT_LIMIT: priv->_agn.reply_tx_stats.short_limit++; break; case TX_STATUS_FAIL_LONG_LIMIT: priv->_agn.reply_tx_stats.long_limit++; break; case TX_STATUS_FAIL_FIFO_UNDERRUN: priv->_agn.reply_tx_stats.fifo_underrun++; break; case TX_STATUS_FAIL_DRAIN_FLOW: priv->_agn.reply_tx_stats.drain_flow++; break; case TX_STATUS_FAIL_RFKILL_FLUSH: priv->_agn.reply_tx_stats.rfkill_flush++; break; case TX_STATUS_FAIL_LIFE_EXPIRE: priv->_agn.reply_tx_stats.life_expire++; break; case TX_STATUS_FAIL_DEST_PS: priv->_agn.reply_tx_stats.dest_ps++; break; case TX_STATUS_FAIL_HOST_ABORTED: priv->_agn.reply_tx_stats.host_abort++; break; case TX_STATUS_FAIL_BT_RETRY: priv->_agn.reply_tx_stats.bt_retry++; break; case TX_STATUS_FAIL_STA_INVALID: priv->_agn.reply_tx_stats.sta_invalid++; break; case TX_STATUS_FAIL_FRAG_DROPPED: priv->_agn.reply_tx_stats.frag_drop++; break; case TX_STATUS_FAIL_TID_DISABLE: priv->_agn.reply_tx_stats.tid_disable++; break; case TX_STATUS_FAIL_FIFO_FLUSHED: priv->_agn.reply_tx_stats.fifo_flush++; break; case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL: priv->_agn.reply_tx_stats.insuff_cf_poll++; break; case TX_STATUS_FAIL_PASSIVE_NO_RX: priv->_agn.reply_tx_stats.fail_hw_drop++; break; case TX_STATUS_FAIL_NO_BEACON_ON_RADAR: priv->_agn.reply_tx_stats.sta_color_mismatch++; break; default: priv->_agn.reply_tx_stats.unknown++; break; } } static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status) { status &= AGG_TX_STATUS_MSK; switch (status) { case AGG_TX_STATE_UNDERRUN_MSK: priv->_agn.reply_agg_tx_stats.underrun++; break; case AGG_TX_STATE_BT_PRIO_MSK: priv->_agn.reply_agg_tx_stats.bt_prio++; break; case AGG_TX_STATE_FEW_BYTES_MSK: priv->_agn.reply_agg_tx_stats.few_bytes++; break; case AGG_TX_STATE_ABORT_MSK: priv->_agn.reply_agg_tx_stats.abort++; break; case AGG_TX_STATE_LAST_SENT_TTL_MSK: priv->_agn.reply_agg_tx_stats.last_sent_ttl++; break; case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK: priv->_agn.reply_agg_tx_stats.last_sent_try++; break; case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK: priv->_agn.reply_agg_tx_stats.last_sent_bt_kill++; break; case AGG_TX_STATE_SCD_QUERY_MSK: priv->_agn.reply_agg_tx_stats.scd_query++; break; case AGG_TX_STATE_TEST_BAD_CRC32_MSK: priv->_agn.reply_agg_tx_stats.bad_crc32++; break; case AGG_TX_STATE_RESPONSE_MSK: priv->_agn.reply_agg_tx_stats.response++; break; case AGG_TX_STATE_DUMP_TX_MSK: priv->_agn.reply_agg_tx_stats.dump_tx++; break; case AGG_TX_STATE_DELAY_TX_MSK: priv->_agn.reply_agg_tx_stats.delay_tx++; break; default: priv->_agn.reply_agg_tx_stats.unknown++; break; } } static void iwlagn_set_tx_status(struct iwl_priv *priv, struct ieee80211_tx_info *info, struct iwl_rxon_context *ctx, struct iwlagn_tx_resp *tx_resp, int txq_id, bool is_agg) { u16 status = le16_to_cpu(tx_resp->status.status); info->status.rates[0].count = tx_resp->failure_frame + 1; if (is_agg) info->flags &= ~IEEE80211_TX_CTL_AMPDU; info->flags |= iwl_tx_status_to_mac80211(status); iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags), info); if (!iwl_is_tx_success(status)) iwlagn_count_tx_err_status(priv, status); if (status == TX_STATUS_FAIL_PASSIVE_NO_RX && iwl_is_associated_ctx(ctx) && ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION) { ctx->last_tx_rejected = true; iwl_stop_queue(priv, &priv->txq[txq_id]); } 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); } #ifdef CONFIG_IWLWIFI_DEBUG #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x const char *iwl_get_agg_tx_fail_reason(u16 status) { status &= AGG_TX_STATUS_MSK; switch (status) { case AGG_TX_STATE_TRANSMITTED: return "SUCCESS"; AGG_TX_STATE_FAIL(UNDERRUN_MSK); AGG_TX_STATE_FAIL(BT_PRIO_MSK); AGG_TX_STATE_FAIL(FEW_BYTES_MSK); AGG_TX_STATE_FAIL(ABORT_MSK); AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK); AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK); AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK); AGG_TX_STATE_FAIL(SCD_QUERY_MSK); AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK); AGG_TX_STATE_FAIL(RESPONSE_MSK); AGG_TX_STATE_FAIL(DUMP_TX_MSK); AGG_TX_STATE_FAIL(DELAY_TX_MSK); } return "UNKNOWN"; } #endif /* CONFIG_IWLWIFI_DEBUG */ static int iwlagn_tx_status_reply_tx(struct iwl_priv *priv, struct iwl_ht_agg *agg, struct iwlagn_tx_resp *tx_resp, int txq_id, u16 start_idx) { u16 status; struct agg_tx_status *frame_status = &tx_resp->status; struct ieee80211_hdr *hdr = NULL; 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 = le32_to_cpu(tx_resp->rate_n_flags); agg->bitmap = 0; /* # frames attempted by Tx command */ if (agg->frame_count == 1) { struct iwl_tx_info *txb; /* Only one frame was attempted; no block-ack will arrive */ idx = start_idx; IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, StartIdx=%d idx=%d\n", agg->frame_count, agg->start_idx, idx); txb = &priv->txq[txq_id].txb[idx]; iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(txb->skb), txb->ctx, tx_resp, txq_id, true); agg->wait_for_ba = 0; } else { /* Two or more frames were attempted; expect block-ack */ u64 bitmap = 0; /* * Start is the lowest frame sent. It may not be the first * frame in the batch; we figure this out dynamically during * the following loop. */ 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_STATUS_MSK) iwlagn_count_agg_tx_err_status(priv, status); 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); IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), " "try-count (0x%08x)\n", iwl_get_agg_tx_fail_reason(status), status & AGG_TX_STATUS_MSK, status & AGG_TX_TRY_MSK); 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 -> how many frames ahead of the starting frame is * the current one? * * Note that all frames sent in the batch must be in a * 64-frame window, so this number should be in [0,63]. * If outside of this window, then we've found a new * "first" frame in the batch and need to change start. */ sh = idx - start; /* * If >= 64, out of window. start must be at the front * of the circular buffer, idx must be near the end of * the buffer, and idx is the new "first" frame. Shift * the indices around. */ if (sh >= 64) { /* Shift bitmap by start - idx, wrapped */ sh = 0x100 - idx + start; bitmap = bitmap << sh; /* Now idx is the new start so sh = 0 */ sh = 0; start = idx; /* * If <= -64 then wraps the 256-pkt circular buffer * (e.g., start = 255 and idx = 0, sh should be 1) */ } else if (sh <= -64) { sh = 0x100 - start + idx; /* * If < 0 but > -64, out of window. idx is before start * but not wrapped. Shift the indices around. */ } else if (sh < 0) { /* Shift by how far start is ahead of idx */ sh = start - idx; bitmap = bitmap << sh; /* Now idx is the new start so sh = 0 */ start = idx; sh = 0; } /* Sequence number start + sh was sent in this batch */ bitmap |= 1ULL << sh; IWL_DEBUG_TX_REPLY(priv, "start=%d bitmap=0x%llx\n", start, (unsigned long long)bitmap); } /* * Store the bitmap and possibly the new start, if we wrapped * the buffer above */ 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, "Tx flush command to flush out all frames\n"); if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) queue_work(priv->workqueue, &priv->tx_flush); } } 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 iwlagn_tx_resp *tx_resp = (void *)&pkt->u.raw[0]; struct iwl_tx_info *txb; u32 status = le16_to_cpu(tx_resp->status.status); int tid; int sta_id; int freed; unsigned long flags; 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; } txq->time_stamp = jiffies; txb = &txq->txb[txq->q.read_ptr]; info = IEEE80211_SKB_CB(txb->skb); memset(&info->status, 0, sizeof(info->status)); tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >> IWLAGN_TX_RES_TID_POS; sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >> IWLAGN_TX_RES_RA_POS; spin_lock_irqsave(&priv->sta_lock, flags); if (txq->sched_retry) { const u32 scd_ssn = iwlagn_get_scd_ssn(tx_resp); struct iwl_ht_agg *agg; agg = &priv->stations[sta_id].tid[tid].agg; /* * If the BT kill count is non-zero, we'll get this * notification again. */ if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 && priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist) { IWL_WARN(priv, "receive reply tx with bt_kill\n"); } 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)) iwl_wake_queue(priv, txq); } } else { iwlagn_set_tx_status(priv, info, txb->ctx, tx_resp, txq_id, false); 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 && status != TX_STATUS_FAIL_PASSIVE_NO_RX) iwl_wake_queue(priv, txq); } iwlagn_txq_check_empty(priv, sta_id, tid, txq_id); iwl_check_abort_status(priv, tx_resp->frame_count, status); spin_unlock_irqrestore(&priv->sta_lock, flags); } 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[REPLY_TX] = iwlagn_rx_reply_tx; /* set up notification wait support */ spin_lock_init(&priv->_agn.notif_wait_lock); INIT_LIST_HEAD(&priv->_agn.notif_waits); init_waitqueue_head(&priv->_agn.notif_waitq); } void iwlagn_setup_deferred_work(struct iwl_priv *priv) { /* * nothing need to be done here anymore * still keep for future use if needed */ } 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 iwlagn_tx_power_dbm_cmd tx_power_cmd; u8 tx_ant_cfg_cmd; if (WARN_ONCE(test_bit(STATUS_SCAN_HW, &priv->status), "TX Power requested while scanning!\n")) return -EAGAIN; /* 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 = IWLAGN_TX_POWER_NO_CLOSED; tx_power_cmd.srv_chan_lmt = IWLAGN_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(priv, tx_ant_cfg_cmd, sizeof(tx_power_cmd), &tx_power_cmd); } void iwlagn_temperature(struct iwl_priv *priv) { /* store temperature from correct statistics (in Celsius) */ priv->temperature = le32_to_cpu(priv->statistics.common.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_TXP_LIMIT: offset = iwl_eeprom_query16(priv, EEPROM_LINK_TXP_LIMIT); break; case INDIRECT_TXP_LIMIT_SIZE: offset = iwl_eeprom_query16(priv, EEPROM_LINK_TXP_LIMIT_SIZE); 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->base_params->eeprom_size); return &priv->eeprom[address]; } struct iwl_mod_params iwlagn_mod_params = { .amsdu_size_8K = 1, .restart_fw = 1, .plcp_check = true, /* 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? */ rb_timeout = RX_RB_TIMEOUT; if (iwlagn_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->bd_dma >> 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; } static void iwlagn_set_pwr_vmain(struct iwl_priv *priv) { /* * (for documentation purposes) * to set power to V_AUX, do: if (pci_pme_capable(priv->pci_dev, PCI_D3cold)) iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG, APMG_PS_CTRL_VAL_PWR_SRC_VAUX, ~APMG_PS_CTRL_MSK_PWR_SRC); */ iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG, APMG_PS_CTRL_VAL_PWR_SRC_VMAIN, ~APMG_PS_CTRL_MSK_PWR_SRC); } 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); iwlagn_set_pwr_vmain(priv); 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); if (priv->cfg->base_params->shadow_reg_enable) { /* enable shadow regs in HW */ iwl_set_bit(priv, CSR_MAC_SHADOW_REG_CTRL, 0x800FFFFF); } 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++; 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->bd_dma); 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; } 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 = chan->hw_value; 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; } static int iwl_fill_offch_tx(struct iwl_priv *priv, void *data, size_t maxlen) { struct sk_buff *skb = priv->_agn.offchan_tx_skb; if (skb->len < maxlen) maxlen = skb->len; memcpy(data, skb->data, maxlen); return maxlen; } int 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 iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 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; u8 scan_tx_antennas = priv->hw_params.valid_tx_ant; int ret; lockdep_assert_held(&priv->mutex); if (vif) ctx = iwl_rxon_ctx_from_vif(vif); 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"); return -ENOMEM; } } 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 (priv->scan_type != IWL_SCAN_OFFCH_TX && iwl_is_any_associated(priv)) { u16 interval = 0; u32 extra; u32 suspend_time = 100; u32 scan_suspend_time = 100; IWL_DEBUG_INFO(priv, "Scanning while associated...\n"); switch (priv->scan_type) { case IWL_SCAN_OFFCH_TX: WARN_ON(1); break; case IWL_SCAN_RADIO_RESET: interval = 0; break; case IWL_SCAN_NORMAL: interval = vif->bss_conf.beacon_int; break; } 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); } else if (priv->scan_type == IWL_SCAN_OFFCH_TX) { scan->suspend_time = 0; scan->max_out_time = cpu_to_le32(1024 * priv->_agn.offchan_tx_timeout); } switch (priv->scan_type) { case IWL_SCAN_RADIO_RESET: IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n"); break; case IWL_SCAN_NORMAL: 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"); break; case IWL_SCAN_OFFCH_TX: IWL_DEBUG_SCAN(priv, "Start offchannel TX scan.\n"); break; } scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK; scan->tx_cmd.sta_id = ctx->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->contexts[IWL_RXON_CTX_BSS].active.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; } /* * Internal scans are passive, so we can indiscriminately set * the BT ignore flag on 2.4 GHz since it applies to TX only. */ if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist) scan->tx_cmd.tx_flags |= TX_CMD_FLG_IGNORE_BT; break; case IEEE80211_BAND_5GHZ: rate = IWL_RATE_6M_PLCP; break; default: IWL_WARN(priv, "Invalid scan band\n"); return -EIO; } /* * 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. * * This was fixed in later versions along with some other * scan changes, and the threshold behaves as a flag in those * versions. */ if (priv->new_scan_threshold_behaviour) scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT : IWL_GOOD_CRC_TH_DISABLED; else scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT : IWL_GOOD_CRC_TH_NEVER; band = priv->scan_band; if (priv->cfg->scan_rx_antennas[band]) rx_ant = priv->cfg->scan_rx_antennas[band]; if (band == IEEE80211_BAND_2GHZ && priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist) { /* transmit 2.4 GHz probes only on first antenna */ scan_tx_antennas = first_antenna(scan_tx_antennas); } priv->scan_tx_ant[band] = iwl_toggle_tx_ant(priv, priv->scan_tx_ant[band], scan_tx_antennas); 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); } if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist && priv->bt_full_concurrent) { /* operated as 1x1 in full concurrency mode */ rx_ant = first_antenna(rx_ant); } /* 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); switch (priv->scan_type) { case IWL_SCAN_NORMAL: cmd_len = iwl_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data, vif->addr, priv->scan_request->ie, priv->scan_request->ie_len, IWL_MAX_SCAN_SIZE - sizeof(*scan)); break; case IWL_SCAN_RADIO_RESET: /* use bcast addr, will not be transmitted but must be valid */ cmd_len = iwl_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data, iwl_bcast_addr, NULL, 0, IWL_MAX_SCAN_SIZE - sizeof(*scan)); break; case IWL_SCAN_OFFCH_TX: cmd_len = iwl_fill_offch_tx(priv, scan->data, IWL_MAX_SCAN_SIZE - sizeof(*scan) - sizeof(struct iwl_scan_channel)); scan->scan_flags |= IWL_SCAN_FLAGS_ACTION_FRAME_TX; break; default: BUG(); } scan->tx_cmd.len = cpu_to_le16(cmd_len); scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK | RXON_FILTER_BCON_AWARE_MSK); switch (priv->scan_type) { case IWL_SCAN_RADIO_RESET: scan->channel_count = iwl_get_single_channel_for_scan(priv, vif, band, (void *)&scan->data[cmd_len]); break; case IWL_SCAN_NORMAL: scan->channel_count = iwl_get_channels_for_scan(priv, vif, band, is_active, n_probes, (void *)&scan->data[cmd_len]); break; case IWL_SCAN_OFFCH_TX: { struct iwl_scan_channel *scan_ch; scan->channel_count = 1; scan_ch = (void *)&scan->data[cmd_len]; scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE; scan_ch->channel = cpu_to_le16(priv->_agn.offchan_tx_chan->hw_value); scan_ch->active_dwell = cpu_to_le16(priv->_agn.offchan_tx_timeout); scan_ch->passive_dwell = 0; /* 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 (priv->_agn.offchan_tx_chan->band == IEEE80211_BAND_5GHZ) scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3; else scan_ch->tx_gain = ((1 << 5) | (5 << 3)); } break; } if (scan->channel_count == 0) { IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count); return -EIO; } cmd.len[0] += le16_to_cpu(scan->tx_cmd.len) + scan->channel_count * sizeof(struct iwl_scan_channel); cmd.data[0] = scan; scan->len = cpu_to_le16(cmd.len[0]); /* set scan bit here for PAN params */ set_bit(STATUS_SCAN_HW, &priv->status); if (priv->cfg->ops->hcmd->set_pan_params) { ret = priv->cfg->ops->hcmd->set_pan_params(priv); if (ret) return ret; } ret = iwl_send_cmd_sync(priv, &cmd); if (ret) { clear_bit(STATUS_SCAN_HW, &priv->status); if (priv->cfg->ops->hcmd->set_pan_params) priv->cfg->ops->hcmd->set_pan_params(priv); } return ret; } 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 iwlagn_add_bssid_station(priv, vif_priv->ctx, vif->bss_conf.bssid, &vif_priv->ibss_bssid_sta_id); return iwl_remove_station(priv, vif_priv->ibss_bssid_sta_id, vif->bss_conf.bssid); } void iwl_free_tfds_in_queue(struct iwl_priv *priv, int sta_id, int tid, int freed) { lockdep_assert_held(&priv->sta_lock); if (priv->stations[sta_id].tid[tid].tfds_in_queue >= freed) priv->stations[sta_id].tid[tid].tfds_in_queue -= freed; else { IWL_DEBUG_TX(priv, "free more than tfds_in_queue (%u:%d)\n", priv->stations[sta_id].tid[tid].tfds_in_queue, freed); priv->stations[sta_id].tid[tid].tfds_in_queue = 0; } } #define IWL_FLUSH_WAIT_MS 2000 int iwlagn_wait_tx_queue_empty(struct iwl_priv *priv) { struct iwl_tx_queue *txq; struct iwl_queue *q; int cnt; unsigned long now = jiffies; int ret = 0; /* waiting for all the tx frames complete might take a while */ for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) { if (cnt == priv->cmd_queue) continue; txq = &priv->txq[cnt]; q = &txq->q; while (q->read_ptr != q->write_ptr && !time_after(jiffies, now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS))) msleep(1); if (q->read_ptr != q->write_ptr) { IWL_ERR(priv, "fail to flush all tx fifo queues\n"); ret = -ETIMEDOUT; break; } } return ret; } #define IWL_TX_QUEUE_MSK 0xfffff /** * iwlagn_txfifo_flush: send REPLY_TXFIFO_FLUSH command to uCode * * pre-requirements: * 1. acquire mutex before calling * 2. make sure rf is on and not in exit state */ int iwlagn_txfifo_flush(struct iwl_priv *priv, u16 flush_control) { struct iwl_txfifo_flush_cmd flush_cmd; struct iwl_host_cmd cmd = { .id = REPLY_TXFIFO_FLUSH, .len = { sizeof(struct iwl_txfifo_flush_cmd), }, .flags = CMD_SYNC, .data = { &flush_cmd, }, }; might_sleep(); memset(&flush_cmd, 0, sizeof(flush_cmd)); flush_cmd.fifo_control = IWL_TX_FIFO_VO_MSK | IWL_TX_FIFO_VI_MSK | IWL_TX_FIFO_BE_MSK | IWL_TX_FIFO_BK_MSK; if (priv->cfg->sku & IWL_SKU_N) flush_cmd.fifo_control |= IWL_AGG_TX_QUEUE_MSK; IWL_DEBUG_INFO(priv, "fifo queue control: 0X%x\n", flush_cmd.fifo_control); flush_cmd.flush_control = cpu_to_le16(flush_control); return iwl_send_cmd(priv, &cmd); } void iwlagn_dev_txfifo_flush(struct iwl_priv *priv, u16 flush_control) { mutex_lock(&priv->mutex); ieee80211_stop_queues(priv->hw); if (priv->cfg->ops->lib->txfifo_flush(priv, IWL_DROP_ALL)) { IWL_ERR(priv, "flush request fail\n"); goto done; } IWL_DEBUG_INFO(priv, "wait transmit/flush all frames\n"); iwlagn_wait_tx_queue_empty(priv); done: ieee80211_wake_queues(priv->hw); mutex_unlock(&priv->mutex); } /* * BT coex */ /* * Macros to access the lookup table. * * The lookup table has 7 inputs: bt3_prio, bt3_txrx, bt_rf_act, wifi_req, * wifi_prio, wifi_txrx and wifi_sh_ant_req. * * It has three outputs: WLAN_ACTIVE, WLAN_KILL and ANT_SWITCH * * The format is that "registers" 8 through 11 contain the WLAN_ACTIVE bits * one after another in 32-bit registers, and "registers" 0 through 7 contain * the WLAN_KILL and ANT_SWITCH bits interleaved (in that order). * * These macros encode that format. */ #define LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, wifi_req, wifi_prio, \ wifi_txrx, wifi_sh_ant_req) \ (bt3_prio | (bt3_txrx << 1) | (bt_rf_act << 2) | (wifi_req << 3) | \ (wifi_prio << 4) | (wifi_txrx << 5) | (wifi_sh_ant_req << 6)) #define LUT_PTA_WLAN_ACTIVE_OP(lut, op, val) \ lut[8 + ((val) >> 5)] op (cpu_to_le32(BIT((val) & 0x1f))) #define LUT_TEST_PTA_WLAN_ACTIVE(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \ wifi_prio, wifi_txrx, wifi_sh_ant_req) \ (!!(LUT_PTA_WLAN_ACTIVE_OP(lut, &, LUT_VALUE(bt3_prio, bt3_txrx, \ bt_rf_act, wifi_req, wifi_prio, wifi_txrx, \ wifi_sh_ant_req)))) #define LUT_SET_PTA_WLAN_ACTIVE(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \ wifi_prio, wifi_txrx, wifi_sh_ant_req) \ LUT_PTA_WLAN_ACTIVE_OP(lut, |=, LUT_VALUE(bt3_prio, bt3_txrx, \ bt_rf_act, wifi_req, wifi_prio, wifi_txrx, \ wifi_sh_ant_req)) #define LUT_CLEAR_PTA_WLAN_ACTIVE(lut, bt3_prio, bt3_txrx, bt_rf_act, \ wifi_req, wifi_prio, wifi_txrx, \ wifi_sh_ant_req) \ LUT_PTA_WLAN_ACTIVE_OP(lut, &= ~, LUT_VALUE(bt3_prio, bt3_txrx, \ bt_rf_act, wifi_req, wifi_prio, wifi_txrx, \ wifi_sh_ant_req)) #define LUT_WLAN_KILL_OP(lut, op, val) \ lut[(val) >> 4] op (cpu_to_le32(BIT(((val) << 1) & 0x1e))) #define LUT_TEST_WLAN_KILL(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \ wifi_prio, wifi_txrx, wifi_sh_ant_req) \ (!!(LUT_WLAN_KILL_OP(lut, &, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \ wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req)))) #define LUT_SET_WLAN_KILL(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \ wifi_prio, wifi_txrx, wifi_sh_ant_req) \ LUT_WLAN_KILL_OP(lut, |=, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \ wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req)) #define LUT_CLEAR_WLAN_KILL(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \ wifi_prio, wifi_txrx, wifi_sh_ant_req) \ LUT_WLAN_KILL_OP(lut, &= ~, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \ wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req)) #define LUT_ANT_SWITCH_OP(lut, op, val) \ lut[(val) >> 4] op (cpu_to_le32(BIT((((val) << 1) & 0x1e) + 1))) #define LUT_TEST_ANT_SWITCH(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \ wifi_prio, wifi_txrx, wifi_sh_ant_req) \ (!!(LUT_ANT_SWITCH_OP(lut, &, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \ wifi_req, wifi_prio, wifi_txrx, \ wifi_sh_ant_req)))) #define LUT_SET_ANT_SWITCH(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \ wifi_prio, wifi_txrx, wifi_sh_ant_req) \ LUT_ANT_SWITCH_OP(lut, |=, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \ wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req)) #define LUT_CLEAR_ANT_SWITCH(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \ wifi_prio, wifi_txrx, wifi_sh_ant_req) \ LUT_ANT_SWITCH_OP(lut, &= ~, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \ wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req)) static const __le32 iwlagn_def_3w_lookup[12] = { cpu_to_le32(0xaaaaaaaa), cpu_to_le32(0xaaaaaaaa), cpu_to_le32(0xaeaaaaaa), cpu_to_le32(0xaaaaaaaa), cpu_to_le32(0xcc00ff28), cpu_to_le32(0x0000aaaa), cpu_to_le32(0xcc00aaaa), cpu_to_le32(0x0000aaaa), cpu_to_le32(0xc0004000), cpu_to_le32(0x00004000), cpu_to_le32(0xf0005000), cpu_to_le32(0xf0005000), }; static const __le32 iwlagn_concurrent_lookup[12] = { cpu_to_le32(0xaaaaaaaa), cpu_to_le32(0xaaaaaaaa), cpu_to_le32(0xaaaaaaaa), cpu_to_le32(0xaaaaaaaa), cpu_to_le32(0xaaaaaaaa), cpu_to_le32(0xaaaaaaaa), cpu_to_le32(0xaaaaaaaa), cpu_to_le32(0xaaaaaaaa), cpu_to_le32(0x00000000), cpu_to_le32(0x00000000), cpu_to_le32(0x00000000), cpu_to_le32(0x00000000), }; void iwlagn_send_advance_bt_config(struct iwl_priv *priv) { struct iwl_basic_bt_cmd basic = { .max_kill = IWLAGN_BT_MAX_KILL_DEFAULT, .bt3_timer_t7_value = IWLAGN_BT3_T7_DEFAULT, .bt3_prio_sample_time = IWLAGN_BT3_PRIO_SAMPLE_DEFAULT, .bt3_timer_t2_value = IWLAGN_BT3_T2_DEFAULT, }; struct iwl6000_bt_cmd bt_cmd_6000; struct iwl2000_bt_cmd bt_cmd_2000; int ret; BUILD_BUG_ON(sizeof(iwlagn_def_3w_lookup) != sizeof(basic.bt3_lookup_table)); if (priv->cfg->bt_params) { if (priv->cfg->bt_params->bt_session_2) { bt_cmd_2000.prio_boost = cpu_to_le32( priv->cfg->bt_params->bt_prio_boost); bt_cmd_2000.tx_prio_boost = 0; bt_cmd_2000.rx_prio_boost = 0; } else { bt_cmd_6000.prio_boost = priv->cfg->bt_params->bt_prio_boost; bt_cmd_6000.tx_prio_boost = 0; bt_cmd_6000.rx_prio_boost = 0; } } else { IWL_ERR(priv, "failed to construct BT Coex Config\n"); return; } basic.kill_ack_mask = priv->kill_ack_mask; basic.kill_cts_mask = priv->kill_cts_mask; basic.valid = priv->bt_valid; /* * Configure BT coex mode to "no coexistence" when the * user disabled BT coexistence, we have no interface * (might be in monitor mode), or the interface is in * IBSS mode (no proper uCode support for coex then). */ if (!bt_coex_active || priv->iw_mode == NL80211_IFTYPE_ADHOC) { basic.flags = IWLAGN_BT_FLAG_COEX_MODE_DISABLED; } else { basic.flags = IWLAGN_BT_FLAG_COEX_MODE_3W << IWLAGN_BT_FLAG_COEX_MODE_SHIFT; if (priv->cfg->bt_params && priv->cfg->bt_params->bt_sco_disable) basic.flags |= IWLAGN_BT_FLAG_SYNC_2_BT_DISABLE; if (priv->bt_ch_announce) basic.flags |= IWLAGN_BT_FLAG_CHANNEL_INHIBITION; IWL_DEBUG_INFO(priv, "BT coex flag: 0X%x\n", basic.flags); } priv->bt_enable_flag = basic.flags; if (priv->bt_full_concurrent) memcpy(basic.bt3_lookup_table, iwlagn_concurrent_lookup, sizeof(iwlagn_concurrent_lookup)); else memcpy(basic.bt3_lookup_table, iwlagn_def_3w_lookup, sizeof(iwlagn_def_3w_lookup)); IWL_DEBUG_INFO(priv, "BT coex %s in %s mode\n", basic.flags ? "active" : "disabled", priv->bt_full_concurrent ? "full concurrency" : "3-wire"); if (priv->cfg->bt_params->bt_session_2) { memcpy(&bt_cmd_2000.basic, &basic, sizeof(basic)); ret = iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG, sizeof(bt_cmd_2000), &bt_cmd_2000); } else { memcpy(&bt_cmd_6000.basic, &basic, sizeof(basic)); ret = iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG, sizeof(bt_cmd_6000), &bt_cmd_6000); } if (ret) IWL_ERR(priv, "failed to send BT Coex Config\n"); } static void iwlagn_bt_traffic_change_work(struct work_struct *work) { struct iwl_priv *priv = container_of(work, struct iwl_priv, bt_traffic_change_work); struct iwl_rxon_context *ctx; int smps_request = -1; if (priv->bt_enable_flag == IWLAGN_BT_FLAG_COEX_MODE_DISABLED) { /* bt coex disabled */ return; } /* * Note: bt_traffic_load can be overridden by scan complete and * coex profile notifications. Ignore that since only bad consequence * can be not matching debug print with actual state. */ IWL_DEBUG_INFO(priv, "BT traffic load changes: %d\n", priv->bt_traffic_load); switch (priv->bt_traffic_load) { case IWL_BT_COEX_TRAFFIC_LOAD_NONE: if (priv->bt_status) smps_request = IEEE80211_SMPS_DYNAMIC; else smps_request = IEEE80211_SMPS_AUTOMATIC; break; case IWL_BT_COEX_TRAFFIC_LOAD_LOW: smps_request = IEEE80211_SMPS_DYNAMIC; break; case IWL_BT_COEX_TRAFFIC_LOAD_HIGH: case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS: smps_request = IEEE80211_SMPS_STATIC; break; default: IWL_ERR(priv, "Invalid BT traffic load: %d\n", priv->bt_traffic_load); break; } mutex_lock(&priv->mutex); /* * We can not send command to firmware while scanning. When the scan * complete we will schedule this work again. We do check with mutex * locked to prevent new scan request to arrive. We do not check * STATUS_SCANNING to avoid race when queue_work two times from * different notifications, but quit and not perform any work at all. */ if (test_bit(STATUS_SCAN_HW, &priv->status)) goto out; if (priv->cfg->ops->lib->update_chain_flags) priv->cfg->ops->lib->update_chain_flags(priv); if (smps_request != -1) { for_each_context(priv, ctx) { if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION) ieee80211_request_smps(ctx->vif, smps_request); } } out: mutex_unlock(&priv->mutex); } static void iwlagn_print_uartmsg(struct iwl_priv *priv, struct iwl_bt_uart_msg *uart_msg) { IWL_DEBUG_NOTIF(priv, "Message Type = 0x%X, SSN = 0x%X, " "Update Req = 0x%X", (BT_UART_MSG_FRAME1MSGTYPE_MSK & uart_msg->frame1) >> BT_UART_MSG_FRAME1MSGTYPE_POS, (BT_UART_MSG_FRAME1SSN_MSK & uart_msg->frame1) >> BT_UART_MSG_FRAME1SSN_POS, (BT_UART_MSG_FRAME1UPDATEREQ_MSK & uart_msg->frame1) >> BT_UART_MSG_FRAME1UPDATEREQ_POS); IWL_DEBUG_NOTIF(priv, "Open connections = 0x%X, Traffic load = 0x%X, " "Chl_SeqN = 0x%X, In band = 0x%X", (BT_UART_MSG_FRAME2OPENCONNECTIONS_MSK & uart_msg->frame2) >> BT_UART_MSG_FRAME2OPENCONNECTIONS_POS, (BT_UART_MSG_FRAME2TRAFFICLOAD_MSK & uart_msg->frame2) >> BT_UART_MSG_FRAME2TRAFFICLOAD_POS, (BT_UART_MSG_FRAME2CHLSEQN_MSK & uart_msg->frame2) >> BT_UART_MSG_FRAME2CHLSEQN_POS, (BT_UART_MSG_FRAME2INBAND_MSK & uart_msg->frame2) >> BT_UART_MSG_FRAME2INBAND_POS); IWL_DEBUG_NOTIF(priv, "SCO/eSCO = 0x%X, Sniff = 0x%X, A2DP = 0x%X, " "ACL = 0x%X, Master = 0x%X, OBEX = 0x%X", (BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3) >> BT_UART_MSG_FRAME3SCOESCO_POS, (BT_UART_MSG_FRAME3SNIFF_MSK & uart_msg->frame3) >> BT_UART_MSG_FRAME3SNIFF_POS, (BT_UART_MSG_FRAME3A2DP_MSK & uart_msg->frame3) >> BT_UART_MSG_FRAME3A2DP_POS, (BT_UART_MSG_FRAME3ACL_MSK & uart_msg->frame3) >> BT_UART_MSG_FRAME3ACL_POS, (BT_UART_MSG_FRAME3MASTER_MSK & uart_msg->frame3) >> BT_UART_MSG_FRAME3MASTER_POS, (BT_UART_MSG_FRAME3OBEX_MSK & uart_msg->frame3) >> BT_UART_MSG_FRAME3OBEX_POS); IWL_DEBUG_NOTIF(priv, "Idle duration = 0x%X", (BT_UART_MSG_FRAME4IDLEDURATION_MSK & uart_msg->frame4) >> BT_UART_MSG_FRAME4IDLEDURATION_POS); IWL_DEBUG_NOTIF(priv, "Tx Activity = 0x%X, Rx Activity = 0x%X, " "eSCO Retransmissions = 0x%X", (BT_UART_MSG_FRAME5TXACTIVITY_MSK & uart_msg->frame5) >> BT_UART_MSG_FRAME5TXACTIVITY_POS, (BT_UART_MSG_FRAME5RXACTIVITY_MSK & uart_msg->frame5) >> BT_UART_MSG_FRAME5RXACTIVITY_POS, (BT_UART_MSG_FRAME5ESCORETRANSMIT_MSK & uart_msg->frame5) >> BT_UART_MSG_FRAME5ESCORETRANSMIT_POS); IWL_DEBUG_NOTIF(priv, "Sniff Interval = 0x%X, Discoverable = 0x%X", (BT_UART_MSG_FRAME6SNIFFINTERVAL_MSK & uart_msg->frame6) >> BT_UART_MSG_FRAME6SNIFFINTERVAL_POS, (BT_UART_MSG_FRAME6DISCOVERABLE_MSK & uart_msg->frame6) >> BT_UART_MSG_FRAME6DISCOVERABLE_POS); IWL_DEBUG_NOTIF(priv, "Sniff Activity = 0x%X, Page = " "0x%X, Inquiry = 0x%X, Connectable = 0x%X", (BT_UART_MSG_FRAME7SNIFFACTIVITY_MSK & uart_msg->frame7) >> BT_UART_MSG_FRAME7SNIFFACTIVITY_POS, (BT_UART_MSG_FRAME7PAGE_MSK & uart_msg->frame7) >> BT_UART_MSG_FRAME7PAGE_POS, (BT_UART_MSG_FRAME7INQUIRY_MSK & uart_msg->frame7) >> BT_UART_MSG_FRAME7INQUIRY_POS, (BT_UART_MSG_FRAME7CONNECTABLE_MSK & uart_msg->frame7) >> BT_UART_MSG_FRAME7CONNECTABLE_POS); } static void iwlagn_set_kill_msk(struct iwl_priv *priv, struct iwl_bt_uart_msg *uart_msg) { u8 kill_msk; static const __le32 bt_kill_ack_msg[2] = { IWLAGN_BT_KILL_ACK_MASK_DEFAULT, IWLAGN_BT_KILL_ACK_CTS_MASK_SCO }; static const __le32 bt_kill_cts_msg[2] = { IWLAGN_BT_KILL_CTS_MASK_DEFAULT, IWLAGN_BT_KILL_ACK_CTS_MASK_SCO }; kill_msk = (BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3) ? 1 : 0; if (priv->kill_ack_mask != bt_kill_ack_msg[kill_msk] || priv->kill_cts_mask != bt_kill_cts_msg[kill_msk]) { priv->bt_valid |= IWLAGN_BT_VALID_KILL_ACK_MASK; priv->kill_ack_mask = bt_kill_ack_msg[kill_msk]; priv->bt_valid |= IWLAGN_BT_VALID_KILL_CTS_MASK; priv->kill_cts_mask = bt_kill_cts_msg[kill_msk]; /* schedule to send runtime bt_config */ queue_work(priv->workqueue, &priv->bt_runtime_config); } } void iwlagn_bt_coex_profile_notif(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { unsigned long flags; struct iwl_rx_packet *pkt = rxb_addr(rxb); struct iwl_bt_coex_profile_notif *coex = &pkt->u.bt_coex_profile_notif; struct iwl_bt_uart_msg *uart_msg = &coex->last_bt_uart_msg; if (priv->bt_enable_flag == IWLAGN_BT_FLAG_COEX_MODE_DISABLED) { /* bt coex disabled */ return; } IWL_DEBUG_NOTIF(priv, "BT Coex notification:\n"); IWL_DEBUG_NOTIF(priv, " status: %d\n", coex->bt_status); IWL_DEBUG_NOTIF(priv, " traffic load: %d\n", coex->bt_traffic_load); IWL_DEBUG_NOTIF(priv, " CI compliance: %d\n", coex->bt_ci_compliance); iwlagn_print_uartmsg(priv, uart_msg); priv->last_bt_traffic_load = priv->bt_traffic_load; if (priv->iw_mode != NL80211_IFTYPE_ADHOC) { if (priv->bt_status != coex->bt_status || priv->last_bt_traffic_load != coex->bt_traffic_load) { if (coex->bt_status) { /* BT on */ if (!priv->bt_ch_announce) priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH; else priv->bt_traffic_load = coex->bt_traffic_load; } else { /* BT off */ priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_NONE; } priv->bt_status = coex->bt_status; queue_work(priv->workqueue, &priv->bt_traffic_change_work); } } iwlagn_set_kill_msk(priv, uart_msg); /* FIXME: based on notification, adjust the prio_boost */ spin_lock_irqsave(&priv->lock, flags); priv->bt_ci_compliance = coex->bt_ci_compliance; spin_unlock_irqrestore(&priv->lock, flags); } void iwlagn_bt_rx_handler_setup(struct iwl_priv *priv) { iwlagn_rx_handler_setup(priv); priv->rx_handlers[REPLY_BT_COEX_PROFILE_NOTIF] = iwlagn_bt_coex_profile_notif; } void iwlagn_bt_setup_deferred_work(struct iwl_priv *priv) { iwlagn_setup_deferred_work(priv); INIT_WORK(&priv->bt_traffic_change_work, iwlagn_bt_traffic_change_work); } void iwlagn_bt_cancel_deferred_work(struct iwl_priv *priv) { cancel_work_sync(&priv->bt_traffic_change_work); } static bool is_single_rx_stream(struct iwl_priv *priv) { return priv->current_ht_config.smps == IEEE80211_SMPS_STATIC || priv->current_ht_config.single_chain_sufficient; } #define IWL_NUM_RX_CHAINS_MULTIPLE 3 #define IWL_NUM_RX_CHAINS_SINGLE 2 #define IWL_NUM_IDLE_CHAINS_DUAL 2 #define IWL_NUM_IDLE_CHAINS_SINGLE 1 /* * Determine how many receiver/antenna chains to use. * * More provides better reception via diversity. Fewer saves power * at the expense of throughput, but only when not in powersave to * start with. * * MIMO (dual stream) requires at least 2, but works better with 3. * This does not determine *which* chains to use, just how many. */ static int iwl_get_active_rx_chain_count(struct iwl_priv *priv) { if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist && (priv->bt_full_concurrent || priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) { /* * only use chain 'A' in bt high traffic load or * full concurrency mode */ return IWL_NUM_RX_CHAINS_SINGLE; } /* # of Rx chains to use when expecting MIMO. */ if (is_single_rx_stream(priv)) return IWL_NUM_RX_CHAINS_SINGLE; else return IWL_NUM_RX_CHAINS_MULTIPLE; } /* * When we are in power saving mode, unless device support spatial * multiplexing power save, use the active count for rx chain count. */ static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt) { /* # Rx chains when idling, depending on SMPS mode */ switch (priv->current_ht_config.smps) { case IEEE80211_SMPS_STATIC: case IEEE80211_SMPS_DYNAMIC: return IWL_NUM_IDLE_CHAINS_SINGLE; case IEEE80211_SMPS_OFF: return active_cnt; default: WARN(1, "invalid SMPS mode %d", priv->current_ht_config.smps); return active_cnt; } } /* up to 4 chains */ static u8 iwl_count_chain_bitmap(u32 chain_bitmap) { u8 res; res = (chain_bitmap & BIT(0)) >> 0; res += (chain_bitmap & BIT(1)) >> 1; res += (chain_bitmap & BIT(2)) >> 2; res += (chain_bitmap & BIT(3)) >> 3; return res; } /** * iwlagn_set_rxon_chain - Set up Rx chain usage in "staging" RXON image * * Selects how many and which Rx receivers/antennas/chains to use. * This should not be used for scan command ... it puts data in wrong place. */ void iwlagn_set_rxon_chain(struct iwl_priv *priv, struct iwl_rxon_context *ctx) { bool is_single = is_single_rx_stream(priv); bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status); u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt; u32 active_chains; u16 rx_chain; /* Tell uCode which antennas are actually connected. * Before first association, we assume all antennas are connected. * Just after first association, iwl_chain_noise_calibration() * checks which antennas actually *are* connected. */ if (priv->chain_noise_data.active_chains) active_chains = priv->chain_noise_data.active_chains; else active_chains = priv->hw_params.valid_rx_ant; if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist && (priv->bt_full_concurrent || priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) { /* * only use chain 'A' in bt high traffic load or * full concurrency mode */ active_chains = first_antenna(active_chains); } rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS; /* How many receivers should we use? */ active_rx_cnt = iwl_get_active_rx_chain_count(priv); idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt); /* correct rx chain count according hw settings * and chain noise calibration */ valid_rx_cnt = iwl_count_chain_bitmap(active_chains); if (valid_rx_cnt < active_rx_cnt) active_rx_cnt = valid_rx_cnt; if (valid_rx_cnt < idle_rx_cnt) idle_rx_cnt = valid_rx_cnt; rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS; rx_chain |= idle_rx_cnt << RXON_RX_CHAIN_CNT_POS; ctx->staging.rx_chain = cpu_to_le16(rx_chain); if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam) ctx->staging.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK; else ctx->staging.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK; IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n", ctx->staging.rx_chain, active_rx_cnt, idle_rx_cnt); WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 || active_rx_cnt < idle_rx_cnt); } u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant, u8 valid) { int i; u8 ind = ant; if (priv->band == IEEE80211_BAND_2GHZ && priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH) return 0; for (i = 0; i < RATE_ANT_NUM - 1; i++) { ind = (ind + 1) < RATE_ANT_NUM ? ind + 1 : 0; if (valid & BIT(ind)) return ind; } return ant; } static const char *get_csr_string(int cmd) { switch (cmd) { IWL_CMD(CSR_HW_IF_CONFIG_REG); IWL_CMD(CSR_INT_COALESCING); IWL_CMD(CSR_INT); IWL_CMD(CSR_INT_MASK); IWL_CMD(CSR_FH_INT_STATUS); IWL_CMD(CSR_GPIO_IN); IWL_CMD(CSR_RESET); IWL_CMD(CSR_GP_CNTRL); IWL_CMD(CSR_HW_REV); IWL_CMD(CSR_EEPROM_REG); IWL_CMD(CSR_EEPROM_GP); IWL_CMD(CSR_OTP_GP_REG); IWL_CMD(CSR_GIO_REG); IWL_CMD(CSR_GP_UCODE_REG); IWL_CMD(CSR_GP_DRIVER_REG); IWL_CMD(CSR_UCODE_DRV_GP1); IWL_CMD(CSR_UCODE_DRV_GP2); IWL_CMD(CSR_LED_REG); IWL_CMD(CSR_DRAM_INT_TBL_REG); IWL_CMD(CSR_GIO_CHICKEN_BITS); IWL_CMD(CSR_ANA_PLL_CFG); IWL_CMD(CSR_HW_REV_WA_REG); IWL_CMD(CSR_DBG_HPET_MEM_REG); default: return "UNKNOWN"; } } void iwl_dump_csr(struct iwl_priv *priv) { int i; static const u32 csr_tbl[] = { CSR_HW_IF_CONFIG_REG, CSR_INT_COALESCING, CSR_INT, CSR_INT_MASK, CSR_FH_INT_STATUS, CSR_GPIO_IN, CSR_RESET, CSR_GP_CNTRL, CSR_HW_REV, CSR_EEPROM_REG, CSR_EEPROM_GP, CSR_OTP_GP_REG, CSR_GIO_REG, CSR_GP_UCODE_REG, CSR_GP_DRIVER_REG, CSR_UCODE_DRV_GP1, CSR_UCODE_DRV_GP2, CSR_LED_REG, CSR_DRAM_INT_TBL_REG, CSR_GIO_CHICKEN_BITS, CSR_ANA_PLL_CFG, CSR_HW_REV_WA_REG, CSR_DBG_HPET_MEM_REG }; IWL_ERR(priv, "CSR values:\n"); IWL_ERR(priv, "(2nd byte of CSR_INT_COALESCING is " "CSR_INT_PERIODIC_REG)\n"); for (i = 0; i < ARRAY_SIZE(csr_tbl); i++) { IWL_ERR(priv, " %25s: 0X%08x\n", get_csr_string(csr_tbl[i]), iwl_read32(priv, csr_tbl[i])); } } static const char *get_fh_string(int cmd) { switch (cmd) { IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG); IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG); IWL_CMD(FH_RSCSR_CHNL0_WPTR); IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG); IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG); IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG); IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV); IWL_CMD(FH_TSSR_TX_STATUS_REG); IWL_CMD(FH_TSSR_TX_ERROR_REG); default: return "UNKNOWN"; } } int iwl_dump_fh(struct iwl_priv *priv, char **buf, bool display) { int i; #ifdef CONFIG_IWLWIFI_DEBUG int pos = 0; size_t bufsz = 0; #endif static const u32 fh_tbl[] = { FH_RSCSR_CHNL0_STTS_WPTR_REG, FH_RSCSR_CHNL0_RBDCB_BASE_REG, FH_RSCSR_CHNL0_WPTR, FH_MEM_RCSR_CHNL0_CONFIG_REG, FH_MEM_RSSR_SHARED_CTRL_REG, FH_MEM_RSSR_RX_STATUS_REG, FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV, FH_TSSR_TX_STATUS_REG, FH_TSSR_TX_ERROR_REG }; #ifdef CONFIG_IWLWIFI_DEBUG if (display) { bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40; *buf = kmalloc(bufsz, GFP_KERNEL); if (!*buf) return -ENOMEM; pos += scnprintf(*buf + pos, bufsz - pos, "FH register values:\n"); for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) { pos += scnprintf(*buf + pos, bufsz - pos, " %34s: 0X%08x\n", get_fh_string(fh_tbl[i]), iwl_read_direct32(priv, fh_tbl[i])); } return pos; } #endif IWL_ERR(priv, "FH register values:\n"); for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) { IWL_ERR(priv, " %34s: 0X%08x\n", get_fh_string(fh_tbl[i]), iwl_read_direct32(priv, fh_tbl[i])); } return 0; } /* notification wait support */ void iwlagn_init_notification_wait(struct iwl_priv *priv, struct iwl_notification_wait *wait_entry, u8 cmd, void (*fn)(struct iwl_priv *priv, struct iwl_rx_packet *pkt, void *data), void *fn_data) { wait_entry->fn = fn; wait_entry->fn_data = fn_data; wait_entry->cmd = cmd; wait_entry->triggered = false; wait_entry->aborted = false; spin_lock_bh(&priv->_agn.notif_wait_lock); list_add(&wait_entry->list, &priv->_agn.notif_waits); spin_unlock_bh(&priv->_agn.notif_wait_lock); } int iwlagn_wait_notification(struct iwl_priv *priv, struct iwl_notification_wait *wait_entry, unsigned long timeout) { int ret; ret = wait_event_timeout(priv->_agn.notif_waitq, wait_entry->triggered || wait_entry->aborted, timeout); spin_lock_bh(&priv->_agn.notif_wait_lock); list_del(&wait_entry->list); spin_unlock_bh(&priv->_agn.notif_wait_lock); if (wait_entry->aborted) return -EIO; /* return value is always >= 0 */ if (ret <= 0) return -ETIMEDOUT; return 0; } void iwlagn_remove_notification(struct iwl_priv *priv, struct iwl_notification_wait *wait_entry) { spin_lock_bh(&priv->_agn.notif_wait_lock); list_del(&wait_entry->list); spin_unlock_bh(&priv->_agn.notif_wait_lock); } int iwlagn_start_device(struct iwl_priv *priv) { int ret; if (iwl_prepare_card_hw(priv)) { IWL_WARN(priv, "Exit HW not ready\n"); return -EIO; } /* If platform's RF_KILL switch is NOT set to KILL */ if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW) clear_bit(STATUS_RF_KILL_HW, &priv->status); else set_bit(STATUS_RF_KILL_HW, &priv->status); if (iwl_is_rfkill(priv)) { wiphy_rfkill_set_hw_state(priv->hw->wiphy, true); iwl_enable_interrupts(priv); return -ERFKILL; } iwl_write32(priv, CSR_INT, 0xFFFFFFFF); ret = iwlagn_hw_nic_init(priv); if (ret) { IWL_ERR(priv, "Unable to init nic\n"); return ret; } /* 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); return 0; } void iwlagn_stop_device(struct iwl_priv *priv) { unsigned long flags; /* 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 */ spin_lock_irqsave(&priv->lock, flags); iwl_disable_interrupts(priv); spin_unlock_irqrestore(&priv->lock, flags); iwl_synchronize_irq(priv); /* device going down, Stop using ICT table */ iwl_disable_ict(priv); /* * If a HW restart happens during firmware loading, * then the firmware loading might call this function * and later it might be called again due to the * restart. So don't process again if the device is * already dead. */ if (test_bit(STATUS_DEVICE_ENABLED, &priv->status)) { iwlagn_txq_ctx_stop(priv); iwlagn_rxq_stop(priv); /* Power-down device's busmaster DMA clocks */ iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT); udelay(5); } /* Make sure (redundant) we've released our request to stay awake */ iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); /* Stop the device, and put it in low power state */ iwl_apm_stop(priv); }