diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-rx.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-rx.c | 880 |
1 files changed, 844 insertions, 36 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-rx.c b/drivers/net/wireless/iwlwifi/iwl-rx.c index 87a6fd84d4d2..6f9a2fa04763 100644 --- a/drivers/net/wireless/iwlwifi/iwl-rx.c +++ b/drivers/net/wireless/iwlwifi/iwl-rx.c @@ -29,6 +29,7 @@ #include <linux/etherdevice.h> #include <linux/slab.h> +#include <linux/sched.h> #include <net/mac80211.h> #include <asm/unaligned.h> #include "iwl-eeprom.h" @@ -37,7 +38,15 @@ #include "iwl-sta.h" #include "iwl-io.h" #include "iwl-helpers.h" -/************************** RX-FUNCTIONS ****************************/ +#include "iwl-agn-calib.h" +#include "iwl-agn.h" + +/****************************************************************************** + * + * RX path functions + * + ******************************************************************************/ + /* * Rx theory of operation * @@ -118,7 +127,6 @@ int iwl_rx_queue_space(const struct iwl_rx_queue *q) s = 0; return s; } -EXPORT_SYMBOL(iwl_rx_queue_space); /** * iwl_rx_queue_update_write_ptr - Update the write pointer for the RX queue @@ -170,7 +178,6 @@ void iwl_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl_rx_queue *q exit_unlock: spin_unlock_irqrestore(&q->lock, flags); } -EXPORT_SYMBOL(iwl_rx_queue_update_write_ptr); int iwl_rx_queue_alloc(struct iwl_priv *priv) { @@ -211,10 +218,105 @@ err_rb: err_bd: return -ENOMEM; } -EXPORT_SYMBOL(iwl_rx_queue_alloc); + +/****************************************************************************** + * + * Generic RX handler implementations + * + ******************************************************************************/ + +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) +{ + struct iwl_rx_packet *pkt = rxb_addr(rxb); + + IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) " + "seq 0x%04X ser 0x%08X\n", + le32_to_cpu(pkt->u.err_resp.error_type), + get_cmd_string(pkt->u.err_resp.cmd_id), + pkt->u.err_resp.cmd_id, + le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num), + le32_to_cpu(pkt->u.err_resp.error_info)); +} + +static void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) +{ + struct iwl_rx_packet *pkt = rxb_addr(rxb); + struct iwl_csa_notification *csa = &(pkt->u.csa_notif); + /* + * MULTI-FIXME + * See iwl_mac_channel_switch. + */ + 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", + le16_to_cpu(csa->channel)); + iwl_chswitch_done(priv, false); + } + } +} -void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv, +static void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { struct iwl_rx_packet *pkt = rxb_addr(rxb); @@ -229,48 +331,494 @@ void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv, memcpy(&priv->measure_report, report, sizeof(*report)); priv->measurement_status |= MEASUREMENT_READY; } -EXPORT_SYMBOL(iwl_rx_spectrum_measure_notif); -void iwl_recover_from_statistics(struct iwl_priv *priv, - struct iwl_rx_packet *pkt) +static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv, + struct iwl_rx_mem_buffer *rxb) +{ +#ifdef CONFIG_IWLWIFI_DEBUG + struct iwl_rx_packet *pkt = rxb_addr(rxb); + struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif); + IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n", + sleep->pm_sleep_mode, sleep->pm_wakeup_src); +#endif +} + +static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv, + struct iwl_rx_mem_buffer *rxb) +{ + struct iwl_rx_packet *pkt = rxb_addr(rxb); + u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK; + IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled " + "notification for %s:\n", len, + get_cmd_string(pkt->hdr.cmd)); + iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len); +} + +static void iwl_rx_beacon_notif(struct iwl_priv *priv, + struct iwl_rx_mem_buffer *rxb) +{ + struct iwl_rx_packet *pkt = rxb_addr(rxb); + struct iwlagn_beacon_notif *beacon = (void *)pkt->u.raw; +#ifdef CONFIG_IWLWIFI_DEBUG + u16 status = le16_to_cpu(beacon->beacon_notify_hdr.status.status); + u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags); + + IWL_DEBUG_RX(priv, "beacon status %#x, retries:%d ibssmgr:%d " + "tsf:0x%.8x%.8x rate:%d\n", + status & TX_STATUS_MSK, + beacon->beacon_notify_hdr.failure_frame, + le32_to_cpu(beacon->ibss_mgr_status), + le32_to_cpu(beacon->high_tsf), + le32_to_cpu(beacon->low_tsf), rate); +#endif + + priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status); + + if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) + queue_work(priv->workqueue, &priv->beacon_update); +} + +/* the threshold ratio of actual_ack_cnt to expected_ack_cnt in percent */ +#define ACK_CNT_RATIO (50) +#define BA_TIMEOUT_CNT (5) +#define BA_TIMEOUT_MAX (16) + +/** + * iwl_good_ack_health - checks for ACK count ratios, BA timeout retries. + * + * When the ACK count ratio is low and aggregated BA timeout retries exceeding + * 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) +{ + int actual_delta, expected_delta, ba_timeout_delta; + struct statistics_tx *cur, *old; + + if (priv->_agn.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; + } + + actual_delta = le32_to_cpu(cur->actual_ack_cnt) - + le32_to_cpu(old->actual_ack_cnt); + expected_delta = le32_to_cpu(cur->expected_ack_cnt) - + le32_to_cpu(old->expected_ack_cnt); + + /* Values should not be negative, but we do not trust the firmware */ + if (actual_delta <= 0 || expected_delta <= 0) + return true; + + ba_timeout_delta = le32_to_cpu(cur->agg.ba_timeout) - + le32_to_cpu(old->agg.ba_timeout); + + if ((actual_delta * 100 / expected_delta) < ACK_CNT_RATIO && + ba_timeout_delta > BA_TIMEOUT_CNT) { + IWL_DEBUG_RADIO(priv, "deltas: actual %d expected %d ba_timeout %d\n", + actual_delta, expected_delta, ba_timeout_delta); + +#ifdef CONFIG_IWLWIFI_DEBUGFS + /* + * This is ifdef'ed on DEBUGFS because otherwise the + * statistics aren't available. If DEBUGFS is set but + * 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); + IWL_DEBUG_RADIO(priv, + "ack_or_ba_timeout_collision delta %d\n", + priv->_agn.delta_statistics.tx.ack_or_ba_timeout_collision); +#endif + + if (ba_timeout_delta >= BA_TIMEOUT_MAX) + return false; + } + + return true; +} + +/** + * iwl_good_plcp_health - checks for plcp error. + * + * When the plcp error is exceeding the thresholds, reset the radio + * to improve the throughput. + */ +static bool iwl_good_plcp_health(struct iwl_priv *priv, + struct iwl_rx_packet *pkt, unsigned int msecs) { + int delta; + int threshold = priv->cfg->base_params->plcp_delta_threshold; + + if (threshold == IWL_MAX_PLCP_ERR_THRESHOLD_DISABLE) { + IWL_DEBUG_RADIO(priv, "plcp_err check disabled\n"); + 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); + } + + /* Can be negative if firmware reseted statistics */ + if (delta <= 0) + return true; + + if ((delta * 100 / msecs) > threshold) { + IWL_DEBUG_RADIO(priv, + "plcp health threshold %u delta %d msecs %u\n", + threshold, delta, msecs); + return false; + } + + return true; +} + +static void iwl_recover_from_statistics(struct iwl_priv *priv, + struct iwl_rx_packet *pkt) +{ + 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; - if (iwl_is_any_associated(priv)) { - if (priv->cfg->ops->lib->check_ack_health) { - if (!priv->cfg->ops->lib->check_ack_health( - priv, pkt)) { - /* - * low ack count detected - * restart Firmware - */ - IWL_ERR(priv, "low ack count detected, " - "restart firmware\n"); - if (!iwl_force_reset(priv, IWL_FW_RESET, false)) - 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; + + /* 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)) { + 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)) + 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 + * before arriving beacon. This measurement can be done only if we know + * exactly when to expect beacons, therefore only when we're associated. */ +static void iwl_rx_calc_noise(struct iwl_priv *priv) +{ + struct statistics_rx_non_phy *rx_info; + int num_active_rx = 0; + int total_silence = 0; + 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); + bcn_silence_a = + le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER; + bcn_silence_b = + le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER; + bcn_silence_c = + le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER; + + if (bcn_silence_a) { + total_silence += bcn_silence_a; + num_active_rx++; + } + if (bcn_silence_b) { + total_silence += bcn_silence_b; + num_active_rx++; + } + if (bcn_silence_c) { + total_silence += bcn_silence_c; + num_active_rx++; + } + + /* Average among active antennas */ + if (num_active_rx) + last_rx_noise = (total_silence / num_active_rx) - 107; + else + last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE; + + IWL_DEBUG_CALIB(priv, "inband silence a %u, b %u, c %u, dBm %d\n", + bcn_silence_a, bcn_silence_b, bcn_silence_c, + last_rx_noise); +} + +/* + * 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) +{ +#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) + *max_delta = *delta; } - if (priv->cfg->ops->lib->check_plcp_health) { - if (!priv->cfg->ops->lib->check_plcp_health( - priv, pkt)) { - /* - * high plcp error detected - * reset Radio - */ - iwl_force_reset(priv, IWL_RF_RESET, false); - } + } + + /* 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_rx_statistics(struct iwl_priv *priv, + struct iwl_rx_mem_buffer *rxb) +{ + const int reg_recalib_period = 60; + int change; + struct iwl_rx_packet *pkt = rxb_addr(rxb); + + 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); + } 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); + } + + iwl_recover_from_statistics(priv, pkt); + + set_bit(STATUS_STATISTICS, &priv->status); + + /* Reschedule the statistics timer to occur in + * reg_recalib_period seconds to ensure we get a + * thermal update even if the uCode doesn't give + * us one */ + mod_timer(&priv->statistics_periodic, jiffies + + msecs_to_jiffies(reg_recalib_period * 1000)); + + if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) && + (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) { + 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); +} + +static void iwl_rx_reply_statistics(struct iwl_priv *priv, + struct iwl_rx_mem_buffer *rxb) +{ + struct iwl_rx_packet *pkt = rxb_addr(rxb); + + 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)); +#endif + IWL_DEBUG_RX(priv, "Statistics have been cleared\n"); + } + iwl_rx_statistics(priv, rxb); +} + +/* Handle notification from uCode that card's power state is changing + * due to software, hardware, or critical temperature RFKILL */ +static void iwl_rx_card_state_notif(struct iwl_priv *priv, + struct iwl_rx_mem_buffer *rxb) +{ + struct iwl_rx_packet *pkt = rxb_addr(rxb); + u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags); + unsigned long status = priv->status; + + IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s CT:%s\n", + (flags & HW_CARD_DISABLED) ? "Kill" : "On", + (flags & SW_CARD_DISABLED) ? "Kill" : "On", + (flags & CT_CARD_DISABLED) ? + "Reached" : "Not reached"); + + if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED | + CT_CARD_DISABLED)) { + + iwl_write32(priv, CSR_UCODE_DRV_GP1_SET, + CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); + + iwl_write_direct32(priv, HBUS_TARG_MBX_C, + HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED); + + if (!(flags & RXON_CARD_DISABLED)) { + iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, + CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); + iwl_write_direct32(priv, HBUS_TARG_MBX_C, + HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED); } + if (flags & CT_CARD_DISABLED) + iwl_tt_enter_ct_kill(priv); + } + if (!(flags & CT_CARD_DISABLED)) + iwl_tt_exit_ct_kill(priv); + + if (flags & HW_CARD_DISABLED) + set_bit(STATUS_RF_KILL_HW, &priv->status); + else + clear_bit(STATUS_RF_KILL_HW, &priv->status); + + + if (!(flags & RXON_CARD_DISABLED)) + iwl_scan_cancel(priv); + + if ((test_bit(STATUS_RF_KILL_HW, &status) != + test_bit(STATUS_RF_KILL_HW, &priv->status))) + wiphy_rfkill_set_hw_state(priv->hw->wiphy, + test_bit(STATUS_RF_KILL_HW, &priv->status)); + else + wake_up_interruptible(&priv->wait_command_queue); +} + +static void iwl_rx_missed_beacon_notif(struct iwl_priv *priv, + struct iwl_rx_mem_buffer *rxb) + +{ + struct iwl_rx_packet *pkt = rxb_addr(rxb); + struct iwl_missed_beacon_notif *missed_beacon; + + missed_beacon = &pkt->u.missed_beacon; + if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) > + priv->missed_beacon_threshold) { + IWL_DEBUG_CALIB(priv, + "missed bcn cnsq %d totl %d rcd %d expctd %d\n", + le32_to_cpu(missed_beacon->consecutive_missed_beacons), + le32_to_cpu(missed_beacon->total_missed_becons), + le32_to_cpu(missed_beacon->num_recvd_beacons), + le32_to_cpu(missed_beacon->num_expected_beacons)); + if (!test_bit(STATUS_SCANNING, &priv->status)) + iwl_init_sensitivity(priv); } } -EXPORT_SYMBOL(iwl_recover_from_statistics); + +/* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD). + * This will be used later in iwl_rx_reply_rx() for REPLY_RX_MPDU_CMD. */ +static void iwl_rx_reply_rx_phy(struct iwl_priv *priv, + struct iwl_rx_mem_buffer *rxb) +{ + struct iwl_rx_packet *pkt = rxb_addr(rxb); + + priv->_agn.last_phy_res_valid = true; + memcpy(&priv->_agn.last_phy_res, pkt->u.raw, + sizeof(struct iwl_rx_phy_res)); +} /* * returns non-zero if packet should be dropped */ -int iwl_set_decrypted_flag(struct iwl_priv *priv, - struct ieee80211_hdr *hdr, - u32 decrypt_res, - struct ieee80211_rx_status *stats) +static int iwl_set_decrypted_flag(struct iwl_priv *priv, + struct ieee80211_hdr *hdr, + u32 decrypt_res, + struct ieee80211_rx_status *stats) { u16 fc = le16_to_cpu(hdr->frame_control); @@ -315,4 +863,264 @@ int iwl_set_decrypted_flag(struct iwl_priv *priv, } return 0; } -EXPORT_SYMBOL(iwl_set_decrypted_flag); + +static void iwl_pass_packet_to_mac80211(struct iwl_priv *priv, + struct ieee80211_hdr *hdr, + u16 len, + u32 ampdu_status, + struct iwl_rx_mem_buffer *rxb, + struct ieee80211_rx_status *stats) +{ + struct sk_buff *skb; + __le16 fc = hdr->frame_control; + + /* We only process data packets if the interface is open */ + if (unlikely(!priv->is_open)) { + IWL_DEBUG_DROP_LIMIT(priv, + "Dropping packet while interface is not open.\n"); + return; + } + + /* In case of HW accelerated crypto and bad decryption, drop */ + if (!priv->cfg->mod_params->sw_crypto && + iwl_set_decrypted_flag(priv, hdr, ampdu_status, stats)) + return; + + skb = dev_alloc_skb(128); + if (!skb) { + IWL_ERR(priv, "dev_alloc_skb failed\n"); + return; + } + + skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb), len); + + iwl_update_stats(priv, false, fc, len); + memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats)); + + ieee80211_rx(priv->hw, skb); + priv->alloc_rxb_page--; + rxb->page = NULL; +} + +static u32 iwl_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in) +{ + u32 decrypt_out = 0; + + if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) == + RX_RES_STATUS_STATION_FOUND) + decrypt_out |= (RX_RES_STATUS_STATION_FOUND | + RX_RES_STATUS_NO_STATION_INFO_MISMATCH); + + decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK); + + /* packet was not encrypted */ + if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) == + RX_RES_STATUS_SEC_TYPE_NONE) + return decrypt_out; + + /* packet was encrypted with unknown alg */ + if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) == + RX_RES_STATUS_SEC_TYPE_ERR) + return decrypt_out; + + /* decryption was not done in HW */ + if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) != + RX_MPDU_RES_STATUS_DEC_DONE_MSK) + return decrypt_out; + + switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) { + + case RX_RES_STATUS_SEC_TYPE_CCMP: + /* alg is CCM: check MIC only */ + if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK)) + /* Bad MIC */ + decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC; + else + decrypt_out |= RX_RES_STATUS_DECRYPT_OK; + + break; + + case RX_RES_STATUS_SEC_TYPE_TKIP: + if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) { + /* Bad TTAK */ + decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK; + break; + } + /* fall through if TTAK OK */ + default: + if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK)) + decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC; + else + decrypt_out |= RX_RES_STATUS_DECRYPT_OK; + break; + } + + IWL_DEBUG_RX(priv, "decrypt_in:0x%x decrypt_out = 0x%x\n", + decrypt_in, decrypt_out); + + return decrypt_out; +} + +/* 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, + struct iwl_rx_mem_buffer *rxb) +{ + struct ieee80211_hdr *header; + struct ieee80211_rx_status rx_status; + struct iwl_rx_packet *pkt = rxb_addr(rxb); + struct iwl_rx_phy_res *phy_res; + __le32 rx_pkt_status; + struct iwl_rx_mpdu_res_start *amsdu; + u32 len; + u32 ampdu_status; + u32 rate_n_flags; + + /** + * REPLY_RX and REPLY_RX_MPDU_CMD are handled differently. + * REPLY_RX: physical layer info is in this buffer + * REPLY_RX_MPDU_CMD: physical layer info was sent in separate + * command and cached in priv->last_phy_res + * + * Here we set up local variables depending on which command is + * received. + */ + if (pkt->hdr.cmd == REPLY_RX) { + phy_res = (struct iwl_rx_phy_res *)pkt->u.raw; + header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*phy_res) + + phy_res->cfg_phy_cnt); + + len = le16_to_cpu(phy_res->byte_count); + rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*phy_res) + + phy_res->cfg_phy_cnt + len); + ampdu_status = le32_to_cpu(rx_pkt_status); + } else { + if (!priv->_agn.last_phy_res_valid) { + IWL_ERR(priv, "MPDU frame without cached PHY data\n"); + return; + } + phy_res = &priv->_agn.last_phy_res; + amsdu = (struct iwl_rx_mpdu_res_start *)pkt->u.raw; + header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*amsdu)); + len = le16_to_cpu(amsdu->byte_count); + rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*amsdu) + len); + ampdu_status = iwl_translate_rx_status(priv, + le32_to_cpu(rx_pkt_status)); + } + + if ((unlikely(phy_res->cfg_phy_cnt > 20))) { + IWL_DEBUG_DROP(priv, "dsp size out of range [0,20]: %d/n", + phy_res->cfg_phy_cnt); + return; + } + + if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) || + !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) { + IWL_DEBUG_RX(priv, "Bad CRC or FIFO: 0x%08X.\n", + le32_to_cpu(rx_pkt_status)); + return; + } + + /* This will be used in several places later */ + rate_n_flags = le32_to_cpu(phy_res->rate_n_flags); + + /* rx_status carries information about the packet to mac80211 */ + rx_status.mactime = le64_to_cpu(phy_res->timestamp); + rx_status.band = (phy_res->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ? + IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ; + rx_status.freq = + ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel), + rx_status.band); + rx_status.rate_idx = + iwlagn_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band); + rx_status.flag = 0; + + /* TSF isn't reliable. In order to allow smooth user experience, + * this W/A doesn't propagate it to the mac80211 */ + /*rx_status.flag |= RX_FLAG_MACTIME_MPDU;*/ + + 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); + + iwl_dbg_log_rx_data_frame(priv, len, header); + IWL_DEBUG_STATS_LIMIT(priv, "Rssi %d, TSF %llu\n", + rx_status.signal, (unsigned long long)rx_status.mactime); + + /* + * "antenna number" + * + * It seems that the antenna field in the phy flags value + * is actually a bit field. This is undefined by radiotap, + * it wants an actual antenna number but I always get "7" + * for most legacy frames I receive indicating that the + * same frame was received on all three RX chains. + * + * I think this field should be removed in favor of a + * new 802.11n radiotap field "RX chains" that is defined + * as a bitmask. + */ + rx_status.antenna = + (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK) + >> RX_RES_PHY_FLAGS_ANTENNA_POS; + + /* set the preamble flag if appropriate */ + if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK) + rx_status.flag |= RX_FLAG_SHORTPRE; + + /* Set up the HT phy flags */ + if (rate_n_flags & RATE_MCS_HT_MSK) + rx_status.flag |= RX_FLAG_HT; + if (rate_n_flags & RATE_MCS_HT40_MSK) + rx_status.flag |= RX_FLAG_40MHZ; + if (rate_n_flags & RATE_MCS_SGI_MSK) + rx_status.flag |= RX_FLAG_SHORT_GI; + + iwl_pass_packet_to_mac80211(priv, header, len, ampdu_status, + rxb, &rx_status); +} + +/** + * iwl_setup_rx_handlers - Initialize Rx handler callbacks + * + * Setup the RX handlers for each of the reply types sent from the uCode + * to the host. + */ +void iwl_setup_rx_handlers(struct iwl_priv *priv) +{ + void (**handlers)(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb); + + 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; + handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif; + handlers[PM_DEBUG_STATISTIC_NOTIFIC] = iwl_rx_pm_debug_statistics_notif; + handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif; + + /* + * The same handler is used for both the REPLY to a discrete + * statistics request from the host as well as for the periodic + * statistics notifications (after received beacons) from the uCode. + */ + handlers[REPLY_STATISTICS_CMD] = iwl_rx_reply_statistics; + handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics; + + iwl_setup_rx_scan_handlers(priv); + + handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif; + handlers[MISSED_BEACONS_NOTIFICATION] = iwl_rx_missed_beacon_notif; + + /* Rx handlers */ + handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy; + handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx; + + /* 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); +} |