diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-rx.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-rx.c | 695 |
1 files changed, 299 insertions, 396 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-rx.c b/drivers/net/wireless/iwlwifi/iwl-rx.c index 6f9a2fa0476..8e314003b63 100644 --- a/drivers/net/wireless/iwlwifi/iwl-rx.c +++ b/drivers/net/wireless/iwlwifi/iwl-rx.c @@ -1,6 +1,6 @@ /****************************************************************************** * - * Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved. + * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved. * * Portions of this file are derived from the ipw3945 project, as well * as portions of the ieee80211 subsystem header files. @@ -41,183 +41,6 @@ #include "iwl-agn-calib.h" #include "iwl-agn.h" -/****************************************************************************** - * - * RX path functions - * - ******************************************************************************/ - -/* - * Rx theory of operation - * - * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs), - * each of which point to Receive Buffers to be filled by the NIC. These get - * used not only for Rx frames, but for any command response or notification - * from the NIC. The driver and NIC manage the Rx buffers by means - * of indexes into the circular buffer. - * - * Rx Queue Indexes - * The host/firmware share two index registers for managing the Rx buffers. - * - * The READ index maps to the first position that the firmware may be writing - * to -- the driver can read up to (but not including) this position and get - * good data. - * The READ index is managed by the firmware once the card is enabled. - * - * The WRITE index maps to the last position the driver has read from -- the - * position preceding WRITE is the last slot the firmware can place a packet. - * - * The queue is empty (no good data) if WRITE = READ - 1, and is full if - * WRITE = READ. - * - * During initialization, the host sets up the READ queue position to the first - * INDEX position, and WRITE to the last (READ - 1 wrapped) - * - * When the firmware places a packet in a buffer, it will advance the READ index - * and fire the RX interrupt. The driver can then query the READ index and - * process as many packets as possible, moving the WRITE index forward as it - * resets the Rx queue buffers with new memory. - * - * The management in the driver is as follows: - * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When - * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled - * to replenish the iwl->rxq->rx_free. - * + In iwl_rx_replenish (scheduled) if 'processed' != 'read' then the - * iwl->rxq is replenished and the READ INDEX is updated (updating the - * 'processed' and 'read' driver indexes as well) - * + A received packet is processed and handed to the kernel network stack, - * detached from the iwl->rxq. The driver 'processed' index is updated. - * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free - * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ - * INDEX is not incremented and iwl->status(RX_STALLED) is set. If there - * were enough free buffers and RX_STALLED is set it is cleared. - * - * - * Driver sequence: - * - * iwl_rx_queue_alloc() Allocates rx_free - * iwl_rx_replenish() Replenishes rx_free list from rx_used, and calls - * iwl_rx_queue_restock - * iwl_rx_queue_restock() Moves available buffers from rx_free into Rx - * queue, updates firmware pointers, and updates - * the WRITE index. If insufficient rx_free buffers - * are available, schedules iwl_rx_replenish - * - * -- enable interrupts -- - * ISR - iwl_rx() Detach iwl_rx_mem_buffers from pool up to the - * READ INDEX, detaching the SKB from the pool. - * Moves the packet buffer from queue to rx_used. - * Calls iwl_rx_queue_restock to refill any empty - * slots. - * ... - * - */ - -/** - * iwl_rx_queue_space - Return number of free slots available in queue. - */ -int iwl_rx_queue_space(const struct iwl_rx_queue *q) -{ - int s = q->read - q->write; - if (s <= 0) - s += RX_QUEUE_SIZE; - /* keep some buffer to not confuse full and empty queue */ - s -= 2; - if (s < 0) - s = 0; - return s; -} - -/** - * iwl_rx_queue_update_write_ptr - Update the write pointer for the RX queue - */ -void iwl_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl_rx_queue *q) -{ - unsigned long flags; - u32 rx_wrt_ptr_reg = priv->hw_params.rx_wrt_ptr_reg; - u32 reg; - - spin_lock_irqsave(&q->lock, flags); - - if (q->need_update == 0) - goto exit_unlock; - - if (priv->cfg->base_params->shadow_reg_enable) { - /* shadow register enabled */ - /* Device expects a multiple of 8 */ - q->write_actual = (q->write & ~0x7); - iwl_write32(priv, rx_wrt_ptr_reg, q->write_actual); - } else { - /* If power-saving is in use, make sure device is awake */ - if (test_bit(STATUS_POWER_PMI, &priv->status)) { - reg = iwl_read32(priv, CSR_UCODE_DRV_GP1); - - if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) { - IWL_DEBUG_INFO(priv, - "Rx queue requesting wakeup," - " GP1 = 0x%x\n", reg); - iwl_set_bit(priv, CSR_GP_CNTRL, - CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); - goto exit_unlock; - } - - q->write_actual = (q->write & ~0x7); - iwl_write_direct32(priv, rx_wrt_ptr_reg, - q->write_actual); - - /* Else device is assumed to be awake */ - } else { - /* Device expects a multiple of 8 */ - q->write_actual = (q->write & ~0x7); - iwl_write_direct32(priv, rx_wrt_ptr_reg, - q->write_actual); - } - } - q->need_update = 0; - - exit_unlock: - spin_unlock_irqrestore(&q->lock, flags); -} - -int iwl_rx_queue_alloc(struct iwl_priv *priv) -{ - struct iwl_rx_queue *rxq = &priv->rxq; - struct device *dev = &priv->pci_dev->dev; - int i; - - spin_lock_init(&rxq->lock); - INIT_LIST_HEAD(&rxq->rx_free); - INIT_LIST_HEAD(&rxq->rx_used); - - /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */ - rxq->bd = dma_alloc_coherent(dev, 4 * RX_QUEUE_SIZE, &rxq->bd_dma, - GFP_KERNEL); - if (!rxq->bd) - goto err_bd; - - rxq->rb_stts = dma_alloc_coherent(dev, sizeof(struct iwl_rb_status), - &rxq->rb_stts_dma, GFP_KERNEL); - if (!rxq->rb_stts) - goto err_rb; - - /* Fill the rx_used queue with _all_ of the Rx buffers */ - for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) - list_add_tail(&rxq->pool[i].list, &rxq->rx_used); - - /* Set us so that we have processed and used all buffers, but have - * not restocked the Rx queue with fresh buffers */ - rxq->read = rxq->write = 0; - rxq->write_actual = 0; - rxq->free_count = 0; - rxq->need_update = 0; - return 0; - -err_rb: - dma_free_coherent(&priv->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd, - rxq->bd_dma); -err_bd: - return -ENOMEM; -} /****************************************************************************** * @@ -225,55 +48,6 @@ err_bd: * ******************************************************************************/ -static void iwl_rx_reply_alive(struct iwl_priv *priv, - struct iwl_rx_mem_buffer *rxb) -{ - struct iwl_rx_packet *pkt = rxb_addr(rxb); - struct iwl_alive_resp *palive; - struct delayed_work *pwork; - - palive = &pkt->u.alive_frame; - - IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision " - "0x%01X 0x%01X\n", - palive->is_valid, palive->ver_type, - palive->ver_subtype); - - if (palive->ver_subtype == INITIALIZE_SUBTYPE) { - IWL_DEBUG_INFO(priv, "Initialization Alive received.\n"); - memcpy(&priv->card_alive_init, - &pkt->u.alive_frame, - sizeof(struct iwl_init_alive_resp)); - pwork = &priv->init_alive_start; - } else { - IWL_DEBUG_INFO(priv, "Runtime Alive received.\n"); - memcpy(&priv->card_alive, &pkt->u.alive_frame, - sizeof(struct iwl_alive_resp)); - pwork = &priv->alive_start; - } - - /* We delay the ALIVE response by 5ms to - * give the HW RF Kill time to activate... */ - if (palive->is_valid == UCODE_VALID_OK) - queue_delayed_work(priv->workqueue, pwork, - msecs_to_jiffies(5)); - else { - IWL_WARN(priv, "%s uCode did not respond OK.\n", - (palive->ver_subtype == INITIALIZE_SUBTYPE) ? - "init" : "runtime"); - /* - * If fail to load init uCode, - * let's try to load the init uCode again. - * We should not get into this situation, but if it - * does happen, we should not move on and loading "runtime" - * without proper calibrate the device. - */ - if (palive->ver_subtype == INITIALIZE_SUBTYPE) - priv->ucode_type = UCODE_NONE; - queue_work(priv->workqueue, &priv->restart); - } -} - static void iwl_rx_reply_error(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { @@ -299,19 +73,19 @@ static void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; struct iwl_rxon_cmd *rxon = (void *)&ctx->active; - if (priv->switch_rxon.switch_in_progress) { - if (!le32_to_cpu(csa->status) && - (csa->channel == priv->switch_rxon.channel)) { - rxon->channel = csa->channel; - ctx->staging.channel = csa->channel; - IWL_DEBUG_11H(priv, "CSA notif: channel %d\n", - le16_to_cpu(csa->channel)); - iwl_chswitch_done(priv, true); - } else { - IWL_ERR(priv, "CSA notif (fail) : channel %d\n", + if (!test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) + return; + + if (!le32_to_cpu(csa->status) && csa->channel == priv->switch_channel) { + rxon->channel = csa->channel; + ctx->staging.channel = csa->channel; + IWL_DEBUG_11H(priv, "CSA notif: channel %d\n", le16_to_cpu(csa->channel)); - iwl_chswitch_done(priv, false); - } + iwl_chswitch_done(priv, true); + } else { + IWL_ERR(priv, "CSA notif (fail) : channel %d\n", + le16_to_cpu(csa->channel)); + iwl_chswitch_done(priv, false); } } @@ -390,21 +164,16 @@ static void iwl_rx_beacon_notif(struct iwl_priv *priv, * the BA_TIMEOUT_MAX, reload firmware and bring system back to normal * operation state. */ -static bool iwl_good_ack_health(struct iwl_priv *priv, struct iwl_rx_packet *pkt) +static bool iwl_good_ack_health(struct iwl_priv *priv, + struct statistics_tx *cur) { int actual_delta, expected_delta, ba_timeout_delta; - struct statistics_tx *cur, *old; + struct statistics_tx *old; - if (priv->_agn.agg_tids_count) + if (priv->agg_tids_count) return true; - if (iwl_bt_statistics(priv)) { - cur = &pkt->u.stats_bt.tx; - old = &priv->_agn.statistics_bt.tx; - } else { - cur = &pkt->u.stats.tx; - old = &priv->_agn.statistics.tx; - } + old = &priv->statistics.tx; actual_delta = le32_to_cpu(cur->actual_ack_cnt) - le32_to_cpu(old->actual_ack_cnt); @@ -430,10 +199,10 @@ static bool iwl_good_ack_health(struct iwl_priv *priv, struct iwl_rx_packet *pkt * DEBUG is not, these will just compile out. */ IWL_DEBUG_RADIO(priv, "rx_detected_cnt delta %d\n", - priv->_agn.delta_statistics.tx.rx_detected_cnt); + priv->delta_stats.tx.rx_detected_cnt); IWL_DEBUG_RADIO(priv, "ack_or_ba_timeout_collision delta %d\n", - priv->_agn.delta_statistics.tx.ack_or_ba_timeout_collision); + priv->delta_stats.tx.ack_or_ba_timeout_collision); #endif if (ba_timeout_delta >= BA_TIMEOUT_MAX) @@ -450,7 +219,9 @@ static bool iwl_good_ack_health(struct iwl_priv *priv, struct iwl_rx_packet *pkt * to improve the throughput. */ static bool iwl_good_plcp_health(struct iwl_priv *priv, - struct iwl_rx_packet *pkt, unsigned int msecs) + struct statistics_rx_phy *cur_ofdm, + struct statistics_rx_ht_phy *cur_ofdm_ht, + unsigned int msecs) { int delta; int threshold = priv->cfg->base_params->plcp_delta_threshold; @@ -460,29 +231,12 @@ static bool iwl_good_plcp_health(struct iwl_priv *priv, return true; } - if (iwl_bt_statistics(priv)) { - struct statistics_rx_bt *cur, *old; - - cur = &pkt->u.stats_bt.rx; - old = &priv->_agn.statistics_bt.rx; - - delta = le32_to_cpu(cur->ofdm.plcp_err) - - le32_to_cpu(old->ofdm.plcp_err) + - le32_to_cpu(cur->ofdm_ht.plcp_err) - - le32_to_cpu(old->ofdm_ht.plcp_err); - } else { - struct statistics_rx *cur, *old; - - cur = &pkt->u.stats.rx; - old = &priv->_agn.statistics.rx; - - delta = le32_to_cpu(cur->ofdm.plcp_err) - - le32_to_cpu(old->ofdm.plcp_err) + - le32_to_cpu(cur->ofdm_ht.plcp_err) - - le32_to_cpu(old->ofdm_ht.plcp_err); - } + delta = le32_to_cpu(cur_ofdm->plcp_err) - + le32_to_cpu(priv->statistics.rx_ofdm.plcp_err) + + le32_to_cpu(cur_ofdm_ht->plcp_err) - + le32_to_cpu(priv->statistics.rx_ofdm_ht.plcp_err); - /* Can be negative if firmware reseted statistics */ + /* Can be negative if firmware reset statistics */ if (delta <= 0) return true; @@ -497,44 +251,35 @@ static bool iwl_good_plcp_health(struct iwl_priv *priv, } static void iwl_recover_from_statistics(struct iwl_priv *priv, - struct iwl_rx_packet *pkt) + struct statistics_rx_phy *cur_ofdm, + struct statistics_rx_ht_phy *cur_ofdm_ht, + struct statistics_tx *tx, + unsigned long stamp) { - const struct iwl_mod_params *mod_params = priv->cfg->mod_params; unsigned int msecs; - unsigned long stamp; if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; - stamp = jiffies; msecs = jiffies_to_msecs(stamp - priv->rx_statistics_jiffies); /* Only gather statistics and update time stamp when not associated */ if (!iwl_is_any_associated(priv)) - goto out; + return; /* Do not check/recover when do not have enough statistics data */ if (msecs < 99) return; - if (mod_params->ack_check && !iwl_good_ack_health(priv, pkt)) { + if (iwlagn_mod_params.ack_check && !iwl_good_ack_health(priv, tx)) { IWL_ERR(priv, "low ack count detected, restart firmware\n"); if (!iwl_force_reset(priv, IWL_FW_RESET, false)) return; } - if (mod_params->plcp_check && !iwl_good_plcp_health(priv, pkt, msecs)) + if (iwlagn_mod_params.plcp_check && + !iwl_good_plcp_health(priv, cur_ofdm, cur_ofdm_ht, msecs)) iwl_force_reset(priv, IWL_RF_RESET, false); - -out: - if (iwl_bt_statistics(priv)) - memcpy(&priv->_agn.statistics_bt, &pkt->u.stats_bt, - sizeof(priv->_agn.statistics_bt)); - else - memcpy(&priv->_agn.statistics, &pkt->u.stats, - sizeof(priv->_agn.statistics)); - - priv->rx_statistics_jiffies = stamp; } /* Calculate noise level, based on measurements during network silence just @@ -548,10 +293,8 @@ static void iwl_rx_calc_noise(struct iwl_priv *priv) int bcn_silence_a, bcn_silence_b, bcn_silence_c; int last_rx_noise; - if (iwl_bt_statistics(priv)) - rx_info = &(priv->_agn.statistics_bt.rx.general.common); - else - rx_info = &(priv->_agn.statistics.rx.general); + rx_info = &priv->statistics.rx_non_phy; + bcn_silence_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER; bcn_silence_b = @@ -583,105 +326,153 @@ static void iwl_rx_calc_noise(struct iwl_priv *priv) last_rx_noise); } +#ifdef CONFIG_IWLWIFI_DEBUGFS /* * based on the assumption of all statistics counter are in DWORD * FIXME: This function is for debugging, do not deal with * the case of counters roll-over. */ -static void iwl_accumulative_statistics(struct iwl_priv *priv, - __le32 *stats) +static void accum_stats(__le32 *prev, __le32 *cur, __le32 *delta, + __le32 *max_delta, __le32 *accum, int size) { -#ifdef CONFIG_IWLWIFI_DEBUGFS - int i, size; - __le32 *prev_stats; - u32 *accum_stats; - u32 *delta, *max_delta; - struct statistics_general_common *general, *accum_general; - struct statistics_tx *tx, *accum_tx; - - if (iwl_bt_statistics(priv)) { - prev_stats = (__le32 *)&priv->_agn.statistics_bt; - accum_stats = (u32 *)&priv->_agn.accum_statistics_bt; - size = sizeof(struct iwl_bt_notif_statistics); - general = &priv->_agn.statistics_bt.general.common; - accum_general = &priv->_agn.accum_statistics_bt.general.common; - tx = &priv->_agn.statistics_bt.tx; - accum_tx = &priv->_agn.accum_statistics_bt.tx; - delta = (u32 *)&priv->_agn.delta_statistics_bt; - max_delta = (u32 *)&priv->_agn.max_delta_bt; - } else { - prev_stats = (__le32 *)&priv->_agn.statistics; - accum_stats = (u32 *)&priv->_agn.accum_statistics; - size = sizeof(struct iwl_notif_statistics); - general = &priv->_agn.statistics.general.common; - accum_general = &priv->_agn.accum_statistics.general.common; - tx = &priv->_agn.statistics.tx; - accum_tx = &priv->_agn.accum_statistics.tx; - delta = (u32 *)&priv->_agn.delta_statistics; - max_delta = (u32 *)&priv->_agn.max_delta; - } - for (i = sizeof(__le32); i < size; - i += sizeof(__le32), stats++, prev_stats++, delta++, - max_delta++, accum_stats++) { - if (le32_to_cpu(*stats) > le32_to_cpu(*prev_stats)) { - *delta = (le32_to_cpu(*stats) - - le32_to_cpu(*prev_stats)); - *accum_stats += *delta; - if (*delta > *max_delta) + int i; + + for (i = 0; + i < size / sizeof(__le32); + i++, prev++, cur++, delta++, max_delta++, accum++) { + if (le32_to_cpu(*cur) > le32_to_cpu(*prev)) { + *delta = cpu_to_le32( + le32_to_cpu(*cur) - le32_to_cpu(*prev)); + le32_add_cpu(accum, le32_to_cpu(*delta)); + if (le32_to_cpu(*delta) > le32_to_cpu(*max_delta)) *max_delta = *delta; } } +} - /* reset accumulative statistics for "no-counter" type statistics */ - accum_general->temperature = general->temperature; - accum_general->temperature_m = general->temperature_m; - accum_general->ttl_timestamp = general->ttl_timestamp; - accum_tx->tx_power.ant_a = tx->tx_power.ant_a; - accum_tx->tx_power.ant_b = tx->tx_power.ant_b; - accum_tx->tx_power.ant_c = tx->tx_power.ant_c; -#endif +static void +iwl_accumulative_statistics(struct iwl_priv *priv, + struct statistics_general_common *common, + struct statistics_rx_non_phy *rx_non_phy, + struct statistics_rx_phy *rx_ofdm, + struct statistics_rx_ht_phy *rx_ofdm_ht, + struct statistics_rx_phy *rx_cck, + struct statistics_tx *tx, + struct statistics_bt_activity *bt_activity) +{ +#define ACCUM(_name) \ + accum_stats((__le32 *)&priv->statistics._name, \ + (__le32 *)_name, \ + (__le32 *)&priv->delta_stats._name, \ + (__le32 *)&priv->max_delta_stats._name, \ + (__le32 *)&priv->accum_stats._name, \ + sizeof(*_name)); + + ACCUM(common); + ACCUM(rx_non_phy); + ACCUM(rx_ofdm); + ACCUM(rx_ofdm_ht); + ACCUM(rx_cck); + ACCUM(tx); + if (bt_activity) + ACCUM(bt_activity); +#undef ACCUM } +#else +static inline void +iwl_accumulative_statistics(struct iwl_priv *priv, + struct statistics_general_common *common, + struct statistics_rx_non_phy *rx_non_phy, + struct statistics_rx_phy *rx_ofdm, + struct statistics_rx_ht_phy *rx_ofdm_ht, + struct statistics_rx_phy *rx_cck, + struct statistics_tx *tx, + struct statistics_bt_activity *bt_activity) +{ +} +#endif static void iwl_rx_statistics(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { + unsigned long stamp = jiffies; const int reg_recalib_period = 60; int change; struct iwl_rx_packet *pkt = rxb_addr(rxb); + u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK; + __le32 *flag; + struct statistics_general_common *common; + struct statistics_rx_non_phy *rx_non_phy; + struct statistics_rx_phy *rx_ofdm; + struct statistics_rx_ht_phy *rx_ofdm_ht; + struct statistics_rx_phy *rx_cck; + struct statistics_tx *tx; + struct statistics_bt_activity *bt_activity; + + len -= sizeof(struct iwl_cmd_header); /* skip header */ + + IWL_DEBUG_RX(priv, "Statistics notification received (%d bytes).\n", + len); + + if (len == sizeof(struct iwl_bt_notif_statistics)) { + struct iwl_bt_notif_statistics *stats; + stats = &pkt->u.stats_bt; + flag = &stats->flag; + common = &stats->general.common; + rx_non_phy = &stats->rx.general.common; + rx_ofdm = &stats->rx.ofdm; + rx_ofdm_ht = &stats->rx.ofdm_ht; + rx_cck = &stats->rx.cck; + tx = &stats->tx; + bt_activity = &stats->general.activity; - if (iwl_bt_statistics(priv)) { - IWL_DEBUG_RX(priv, - "Statistics notification received (%d vs %d).\n", - (int)sizeof(struct iwl_bt_notif_statistics), - le32_to_cpu(pkt->len_n_flags) & - FH_RSCSR_FRAME_SIZE_MSK); - - change = ((priv->_agn.statistics_bt.general.common.temperature != - pkt->u.stats_bt.general.common.temperature) || - ((priv->_agn.statistics_bt.flag & - STATISTICS_REPLY_FLG_HT40_MODE_MSK) != - (pkt->u.stats_bt.flag & - STATISTICS_REPLY_FLG_HT40_MODE_MSK))); - - iwl_accumulative_statistics(priv, (__le32 *)&pkt->u.stats_bt); +#ifdef CONFIG_IWLWIFI_DEBUGFS + /* handle this exception directly */ + priv->statistics.num_bt_kills = stats->rx.general.num_bt_kills; + le32_add_cpu(&priv->statistics.accum_num_bt_kills, + le32_to_cpu(stats->rx.general.num_bt_kills)); +#endif + } else if (len == sizeof(struct iwl_notif_statistics)) { + struct iwl_notif_statistics *stats; + stats = &pkt->u.stats; + flag = &stats->flag; + common = &stats->general.common; + rx_non_phy = &stats->rx.general; + rx_ofdm = &stats->rx.ofdm; + rx_ofdm_ht = &stats->rx.ofdm_ht; + rx_cck = &stats->rx.cck; + tx = &stats->tx; + bt_activity = NULL; } else { - IWL_DEBUG_RX(priv, - "Statistics notification received (%d vs %d).\n", - (int)sizeof(struct iwl_notif_statistics), - le32_to_cpu(pkt->len_n_flags) & - FH_RSCSR_FRAME_SIZE_MSK); - - change = ((priv->_agn.statistics.general.common.temperature != - pkt->u.stats.general.common.temperature) || - ((priv->_agn.statistics.flag & - STATISTICS_REPLY_FLG_HT40_MODE_MSK) != - (pkt->u.stats.flag & - STATISTICS_REPLY_FLG_HT40_MODE_MSK))); - - iwl_accumulative_statistics(priv, (__le32 *)&pkt->u.stats); + WARN_ONCE(1, "len %d doesn't match BT (%zu) or normal (%zu)\n", + len, sizeof(struct iwl_bt_notif_statistics), + sizeof(struct iwl_notif_statistics)); + return; } - iwl_recover_from_statistics(priv, pkt); + change = common->temperature != priv->statistics.common.temperature || + (*flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK) != + (priv->statistics.flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK); + + iwl_accumulative_statistics(priv, common, rx_non_phy, rx_ofdm, + rx_ofdm_ht, rx_cck, tx, bt_activity); + + iwl_recover_from_statistics(priv, rx_ofdm, rx_ofdm_ht, tx, stamp); + + priv->statistics.flag = *flag; + memcpy(&priv->statistics.common, common, sizeof(*common)); + memcpy(&priv->statistics.rx_non_phy, rx_non_phy, sizeof(*rx_non_phy)); + memcpy(&priv->statistics.rx_ofdm, rx_ofdm, sizeof(*rx_ofdm)); + memcpy(&priv->statistics.rx_ofdm_ht, rx_ofdm_ht, sizeof(*rx_ofdm_ht)); + memcpy(&priv->statistics.rx_cck, rx_cck, sizeof(*rx_cck)); + memcpy(&priv->statistics.tx, tx, sizeof(*tx)); +#ifdef CONFIG_IWLWIFI_DEBUGFS + if (bt_activity) + memcpy(&priv->statistics.bt_activity, bt_activity, + sizeof(*bt_activity)); +#endif + + priv->rx_statistics_jiffies = stamp; set_bit(STATUS_STATISTICS, &priv->status); @@ -697,8 +488,8 @@ static void iwl_rx_statistics(struct iwl_priv *priv, iwl_rx_calc_noise(priv); queue_work(priv->workqueue, &priv->run_time_calib_work); } - if (priv->cfg->ops->lib->temp_ops.temperature && change) - priv->cfg->ops->lib->temp_ops.temperature(priv); + if (priv->cfg->lib->temperature && change) + priv->cfg->lib->temperature(priv); } static void iwl_rx_reply_statistics(struct iwl_priv *priv, @@ -708,18 +499,12 @@ static void iwl_rx_reply_statistics(struct iwl_priv *priv, if (le32_to_cpu(pkt->u.stats.flag) & UCODE_STATISTICS_CLEAR_MSK) { #ifdef CONFIG_IWLWIFI_DEBUGFS - memset(&priv->_agn.accum_statistics, 0, - sizeof(struct iwl_notif_statistics)); - memset(&priv->_agn.delta_statistics, 0, - sizeof(struct iwl_notif_statistics)); - memset(&priv->_agn.max_delta, 0, - sizeof(struct iwl_notif_statistics)); - memset(&priv->_agn.accum_statistics_bt, 0, - sizeof(struct iwl_bt_notif_statistics)); - memset(&priv->_agn.delta_statistics_bt, 0, - sizeof(struct iwl_bt_notif_statistics)); - memset(&priv->_agn.max_delta_bt, 0, - sizeof(struct iwl_bt_notif_statistics)); + memset(&priv->accum_stats, 0, + sizeof(priv->accum_stats)); + memset(&priv->delta_stats, 0, + sizeof(priv->delta_stats)); + memset(&priv->max_delta_stats, 0, + sizeof(priv->max_delta_stats)); #endif IWL_DEBUG_RX(priv, "Statistics have been cleared\n"); } @@ -807,8 +592,8 @@ static void iwl_rx_reply_rx_phy(struct iwl_priv *priv, { struct iwl_rx_packet *pkt = rxb_addr(rxb); - priv->_agn.last_phy_res_valid = true; - memcpy(&priv->_agn.last_phy_res, pkt->u.raw, + priv->last_phy_res_valid = true; + memcpy(&priv->last_phy_res, pkt->u.raw, sizeof(struct iwl_rx_phy_res)); } @@ -873,6 +658,7 @@ static void iwl_pass_packet_to_mac80211(struct iwl_priv *priv, { struct sk_buff *skb; __le16 fc = hdr->frame_control; + struct iwl_rxon_context *ctx; /* We only process data packets if the interface is open */ if (unlikely(!priv->is_open)) { @@ -882,7 +668,7 @@ static void iwl_pass_packet_to_mac80211(struct iwl_priv *priv, } /* In case of HW accelerated crypto and bad decryption, drop */ - if (!priv->cfg->mod_params->sw_crypto && + if (!iwlagn_mod_params.sw_crypto && iwl_set_decrypted_flag(priv, hdr, ampdu_status, stats)) return; @@ -895,10 +681,29 @@ static void iwl_pass_packet_to_mac80211(struct iwl_priv *priv, skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb), len); iwl_update_stats(priv, false, fc, len); + + /* + * Wake any queues that were stopped due to a passive channel tx + * failure. This can happen because the regulatory enforcement in + * the device waits for a beacon before allowing transmission, + * sometimes even after already having transmitted frames for the + * association because the new RXON may reset the information. + */ + if (unlikely(ieee80211_is_beacon(fc))) { + for_each_context(priv, ctx) { + if (!ctx->last_tx_rejected) + continue; + if (compare_ether_addr(hdr->addr3, + ctx->active.bssid_addr)) + continue; + ctx->last_tx_rejected = false; + iwl_wake_any_queue(priv, ctx); + } + } + memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats)); ieee80211_rx(priv->hw, skb); - priv->alloc_rxb_page--; rxb->page = NULL; } @@ -961,6 +766,47 @@ static u32 iwl_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in) return decrypt_out; } +/* Calc max signal level (dBm) among 3 possible receivers */ +static int iwlagn_calc_rssi(struct iwl_priv *priv, + struct iwl_rx_phy_res *rx_resp) +{ + /* data from PHY/DSP regarding signal strength, etc., + * contents are always there, not configurable by host + */ + struct iwlagn_non_cfg_phy *ncphy = + (struct iwlagn_non_cfg_phy *)rx_resp->non_cfg_phy_buf; + u32 val, rssi_a, rssi_b, rssi_c, max_rssi; + u8 agc; + + val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_AGC_IDX]); + agc = (val & IWLAGN_OFDM_AGC_MSK) >> IWLAGN_OFDM_AGC_BIT_POS; + + /* Find max rssi among 3 possible receivers. + * These values are measured by the digital signal processor (DSP). + * They should stay fairly constant even as the signal strength varies, + * if the radio's automatic gain control (AGC) is working right. + * AGC value (see below) will provide the "interesting" info. + */ + val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_AB_IDX]); + rssi_a = (val & IWLAGN_OFDM_RSSI_INBAND_A_BITMSK) >> + IWLAGN_OFDM_RSSI_A_BIT_POS; + rssi_b = (val & IWLAGN_OFDM_RSSI_INBAND_B_BITMSK) >> + IWLAGN_OFDM_RSSI_B_BIT_POS; + val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_C_IDX]); + rssi_c = (val & IWLAGN_OFDM_RSSI_INBAND_C_BITMSK) >> + IWLAGN_OFDM_RSSI_C_BIT_POS; + + max_rssi = max_t(u32, rssi_a, rssi_b); + max_rssi = max_t(u32, max_rssi, rssi_c); + + IWL_DEBUG_STATS(priv, "Rssi In A %d B %d C %d Max %d AGC dB %d\n", + rssi_a, rssi_b, rssi_c, max_rssi, agc); + + /* dBm = max_rssi dB - agc dB - constant. + * Higher AGC (higher radio gain) means lower signal. */ + return max_rssi - agc - IWLAGN_RSSI_OFFSET; +} + /* Called for REPLY_RX (legacy ABG frames), or * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */ static void iwl_rx_reply_rx(struct iwl_priv *priv, @@ -995,11 +841,11 @@ static void iwl_rx_reply_rx(struct iwl_priv *priv, phy_res->cfg_phy_cnt + len); ampdu_status = le32_to_cpu(rx_pkt_status); } else { - if (!priv->_agn.last_phy_res_valid) { + if (!priv->last_phy_res_valid) { IWL_ERR(priv, "MPDU frame without cached PHY data\n"); return; } - phy_res = &priv->_agn.last_phy_res; + phy_res = &priv->last_phy_res; amsdu = (struct iwl_rx_mpdu_res_start *)pkt->u.raw; header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*amsdu)); len = le16_to_cpu(amsdu->byte_count); @@ -1042,7 +888,7 @@ static void iwl_rx_reply_rx(struct iwl_priv *priv, 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 = priv->cfg->ops->utils->calc_rssi(priv, phy_res); + rx_status.signal = iwlagn_calc_rssi(priv, phy_res); iwl_dbg_log_rx_data_frame(priv, len, header); IWL_DEBUG_STATS_LIMIT(priv, "Rssi %d, TSF %llu\n", @@ -1093,7 +939,6 @@ void iwl_setup_rx_handlers(struct iwl_priv *priv) handlers = priv->rx_handlers; - handlers[REPLY_ALIVE] = iwl_rx_reply_alive; handlers[REPLY_ERROR] = iwl_rx_reply_error; handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa; handlers[SPECTRUM_MEASURE_NOTIFICATION] = iwl_rx_spectrum_measure_notif; @@ -1121,6 +966,64 @@ void iwl_setup_rx_handlers(struct iwl_priv *priv) /* block ack */ handlers[REPLY_COMPRESSED_BA] = iwlagn_rx_reply_compressed_ba; - /* Set up hardware specific Rx handlers */ - priv->cfg->ops->lib->rx_handler_setup(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->notif_wait_lock); + INIT_LIST_HEAD(&priv->notif_waits); + init_waitqueue_head(&priv->notif_waitq); + + /* Set up BT Rx handlers */ + if (priv->cfg->lib->bt_rx_handler_setup) + priv->cfg->lib->bt_rx_handler_setup(priv); + +} + +void iwl_rx_dispatch(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) +{ + struct iwl_rx_packet *pkt = rxb_addr(rxb); + + /* + * Do the notification wait before RX handlers so + * even if the RX handler consumes the RXB we have + * access to it in the notification wait entry. + */ + if (!list_empty(&priv->notif_waits)) { + struct iwl_notification_wait *w; + + spin_lock(&priv->notif_wait_lock); + list_for_each_entry(w, &priv->notif_waits, list) { + if (w->cmd != pkt->hdr.cmd) + continue; + IWL_DEBUG_RX(priv, + "Notif: %s, 0x%02x - wake the callers up\n", + get_cmd_string(pkt->hdr.cmd), + pkt->hdr.cmd); + w->triggered = true; + if (w->fn) + w->fn(priv, pkt, w->fn_data); + } + spin_unlock(&priv->notif_wait_lock); + + wake_up_all(&priv->notif_waitq); + } + + if (priv->pre_rx_handler) + priv->pre_rx_handler(priv, rxb); + + /* Based on type of command response or notification, + * handle those that need handling via function in + * rx_handlers table. See iwl_setup_rx_handlers() */ + if (priv->rx_handlers[pkt->hdr.cmd]) { + priv->isr_stats.rx_handlers[pkt->hdr.cmd]++; + priv->rx_handlers[pkt->hdr.cmd] (priv, rxb); + } else { + /* No handling needed */ + IWL_DEBUG_RX(priv, + "No handler needed for %s, 0x%02x\n", + get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd); + } } |