diff options
author | Wey-Yi Guy <wey-yi.w.guy@intel.com> | 2011-10-10 16:27:13 +0200 |
---|---|---|
committer | John W. Linville <linville@tuxdriver.com> | 2011-10-14 20:48:13 +0200 |
commit | 3246c4e6addfbf69b23095b69c5484cd76ddb37b (patch) | |
tree | 1f3711d7d78fb04549b9d4ec0120d25d8e6761fd /drivers/net/wireless/iwlwifi/iwl-rx.c | |
parent | iwlagn: merge station management functions (diff) | |
download | linux-3246c4e6addfbf69b23095b69c5484cd76ddb37b.tar.xz linux-3246c4e6addfbf69b23095b69c5484cd76ddb37b.zip |
iwlagn: rename iwl-rx.c to iwl-agn-rx.c
After driver split, there were no shared functions between agn and legacy;
rename iwl-rx.c to iwl-agn-rx.c
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-rx.c')
-rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-rx.c | 1139 |
1 files changed, 0 insertions, 1139 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-rx.c b/drivers/net/wireless/iwlwifi/iwl-rx.c deleted file mode 100644 index d406c7288ccc..000000000000 --- a/drivers/net/wireless/iwlwifi/iwl-rx.c +++ /dev/null @@ -1,1139 +0,0 @@ -/****************************************************************************** - * - * 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. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of version 2 of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA - * - * The full GNU General Public License is included in this distribution in the - * file called LICENSE. - * - * Contact Information: - * Intel Linux Wireless <ilw@linux.intel.com> - * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 - * - *****************************************************************************/ - -#include <linux/etherdevice.h> -#include <linux/slab.h> -#include <linux/sched.h> -#include <net/mac80211.h> -#include <asm/unaligned.h> -#include "iwl-eeprom.h" -#include "iwl-dev.h" -#include "iwl-core.h" -#include "iwl-io.h" -#include "iwl-helpers.h" -#include "iwl-agn-calib.h" -#include "iwl-agn.h" -#include "iwl-shared.h" - -const char *get_cmd_string(u8 cmd) -{ - switch (cmd) { - IWL_CMD(REPLY_ALIVE); - IWL_CMD(REPLY_ERROR); - IWL_CMD(REPLY_ECHO); - IWL_CMD(REPLY_RXON); - IWL_CMD(REPLY_RXON_ASSOC); - IWL_CMD(REPLY_QOS_PARAM); - IWL_CMD(REPLY_RXON_TIMING); - IWL_CMD(REPLY_ADD_STA); - IWL_CMD(REPLY_REMOVE_STA); - IWL_CMD(REPLY_REMOVE_ALL_STA); - IWL_CMD(REPLY_TXFIFO_FLUSH); - IWL_CMD(REPLY_WEPKEY); - IWL_CMD(REPLY_TX); - IWL_CMD(REPLY_LEDS_CMD); - IWL_CMD(REPLY_TX_LINK_QUALITY_CMD); - IWL_CMD(COEX_PRIORITY_TABLE_CMD); - IWL_CMD(COEX_MEDIUM_NOTIFICATION); - IWL_CMD(COEX_EVENT_CMD); - IWL_CMD(REPLY_QUIET_CMD); - IWL_CMD(REPLY_CHANNEL_SWITCH); - IWL_CMD(CHANNEL_SWITCH_NOTIFICATION); - IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD); - IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION); - IWL_CMD(POWER_TABLE_CMD); - IWL_CMD(PM_SLEEP_NOTIFICATION); - IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC); - IWL_CMD(REPLY_SCAN_CMD); - IWL_CMD(REPLY_SCAN_ABORT_CMD); - IWL_CMD(SCAN_START_NOTIFICATION); - IWL_CMD(SCAN_RESULTS_NOTIFICATION); - IWL_CMD(SCAN_COMPLETE_NOTIFICATION); - IWL_CMD(BEACON_NOTIFICATION); - IWL_CMD(REPLY_TX_BEACON); - IWL_CMD(WHO_IS_AWAKE_NOTIFICATION); - IWL_CMD(QUIET_NOTIFICATION); - IWL_CMD(REPLY_TX_PWR_TABLE_CMD); - IWL_CMD(MEASURE_ABORT_NOTIFICATION); - IWL_CMD(REPLY_BT_CONFIG); - IWL_CMD(REPLY_STATISTICS_CMD); - IWL_CMD(STATISTICS_NOTIFICATION); - IWL_CMD(REPLY_CARD_STATE_CMD); - IWL_CMD(CARD_STATE_NOTIFICATION); - IWL_CMD(MISSED_BEACONS_NOTIFICATION); - IWL_CMD(REPLY_CT_KILL_CONFIG_CMD); - IWL_CMD(SENSITIVITY_CMD); - IWL_CMD(REPLY_PHY_CALIBRATION_CMD); - IWL_CMD(REPLY_RX_PHY_CMD); - IWL_CMD(REPLY_RX_MPDU_CMD); - IWL_CMD(REPLY_RX); - IWL_CMD(REPLY_COMPRESSED_BA); - IWL_CMD(CALIBRATION_CFG_CMD); - IWL_CMD(CALIBRATION_RES_NOTIFICATION); - IWL_CMD(CALIBRATION_COMPLETE_NOTIFICATION); - IWL_CMD(REPLY_TX_POWER_DBM_CMD); - IWL_CMD(TEMPERATURE_NOTIFICATION); - IWL_CMD(TX_ANT_CONFIGURATION_CMD); - IWL_CMD(REPLY_BT_COEX_PROFILE_NOTIF); - IWL_CMD(REPLY_BT_COEX_PRIO_TABLE); - IWL_CMD(REPLY_BT_COEX_PROT_ENV); - IWL_CMD(REPLY_WIPAN_PARAMS); - IWL_CMD(REPLY_WIPAN_RXON); - IWL_CMD(REPLY_WIPAN_RXON_TIMING); - IWL_CMD(REPLY_WIPAN_RXON_ASSOC); - IWL_CMD(REPLY_WIPAN_QOS_PARAM); - IWL_CMD(REPLY_WIPAN_WEPKEY); - IWL_CMD(REPLY_WIPAN_P2P_CHANNEL_SWITCH); - IWL_CMD(REPLY_WIPAN_NOA_NOTIFICATION); - IWL_CMD(REPLY_WIPAN_DEACTIVATION_COMPLETE); - IWL_CMD(REPLY_WOWLAN_PATTERNS); - IWL_CMD(REPLY_WOWLAN_WAKEUP_FILTER); - IWL_CMD(REPLY_WOWLAN_TSC_RSC_PARAMS); - IWL_CMD(REPLY_WOWLAN_TKIP_PARAMS); - IWL_CMD(REPLY_WOWLAN_KEK_KCK_MATERIAL); - IWL_CMD(REPLY_WOWLAN_GET_STATUS); - default: - return "UNKNOWN"; - - } -} - -/****************************************************************************** - * - * Generic RX handler implementations - * - ******************************************************************************/ - -static int iwl_rx_reply_error(struct iwl_priv *priv, - struct iwl_rx_mem_buffer *rxb, - struct iwl_device_cmd *cmd) -{ - 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)); - return 0; -} - -static int iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb, - struct iwl_device_cmd *cmd) -{ - struct iwl_rx_packet *pkt = rxb_addr(rxb); - struct iwl_csa_notification *csa = &(pkt->u.csa_notif); - /* - * MULTI-FIXME - * See iwlagn_mac_channel_switch. - */ - struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; - struct iwl_rxon_cmd *rxon = (void *)&ctx->active; - - if (!test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status)) - return 0; - - 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, true); - } else { - IWL_ERR(priv, "CSA notif (fail) : channel %d\n", - le16_to_cpu(csa->channel)); - iwl_chswitch_done(priv, false); - } - return 0; -} - - -static int iwl_rx_spectrum_measure_notif(struct iwl_priv *priv, - struct iwl_rx_mem_buffer *rxb, - struct iwl_device_cmd *cmd) -{ - struct iwl_rx_packet *pkt = rxb_addr(rxb); - struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif); - - if (!report->state) { - IWL_DEBUG_11H(priv, - "Spectrum Measure Notification: Start\n"); - return 0; - } - - memcpy(&priv->measure_report, report, sizeof(*report)); - priv->measurement_status |= MEASUREMENT_READY; - return 0; -} - -static int iwl_rx_pm_sleep_notif(struct iwl_priv *priv, - struct iwl_rx_mem_buffer *rxb, - struct iwl_device_cmd *cmd) -{ -#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 - return 0; -} - -static int iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv, - struct iwl_rx_mem_buffer *rxb, - struct iwl_device_cmd *cmd) -{ - struct iwl_rx_packet *pkt = rxb_addr(rxb); - u32 __maybe_unused 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); - return 0; -} - -static int iwl_rx_beacon_notif(struct iwl_priv *priv, - struct iwl_rx_mem_buffer *rxb, - struct iwl_device_cmd *cmd) -{ - 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); - - return 0; -} - -/* 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 statistics_tx *cur) -{ - int actual_delta, expected_delta, ba_timeout_delta; - struct statistics_tx *old; - - if (priv->agg_tids_count) - return true; - - old = &priv->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->delta_stats.tx.rx_detected_cnt); - IWL_DEBUG_RADIO(priv, - "ack_or_ba_timeout_collision delta %d\n", - priv->delta_stats.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 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; - - if (threshold == IWL_MAX_PLCP_ERR_THRESHOLD_DISABLE) { - IWL_DEBUG_RADIO(priv, "plcp_err check disabled\n"); - return true; - } - - 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 reset 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 statistics_rx_phy *cur_ofdm, - struct statistics_rx_ht_phy *cur_ofdm_ht, - struct statistics_tx *tx, - unsigned long stamp) -{ - unsigned int msecs; - - if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status)) - return; - - 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)) - return; - - /* Do not check/recover when do not have enough statistics data */ - if (msecs < 99) - return; - - 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 (iwlagn_mod_params.plcp_check && - !iwl_good_plcp_health(priv, cur_ofdm, cur_ofdm_ht, msecs)) - iwl_force_reset(priv, IWL_RF_RESET, false); -} - -/* 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; - - 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 = - 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); -} - -#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 accum_stats(__le32 *prev, __le32 *cur, __le32 *delta, - __le32 *max_delta, __le32 *accum, int size) -{ - 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; - } - } -} - -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 int iwl_rx_statistics(struct iwl_priv *priv, - struct iwl_rx_mem_buffer *rxb, - struct iwl_device_cmd *cmd) -{ - 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; - -#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 { - 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 0; - } - - 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->shrd->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->shrd->status)) && - (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) { - iwl_rx_calc_noise(priv); - queue_work(priv->shrd->workqueue, &priv->run_time_calib_work); - } - if (priv->cfg->lib->temperature && change) - priv->cfg->lib->temperature(priv); - return 0; -} - -static int iwl_rx_reply_statistics(struct iwl_priv *priv, - struct iwl_rx_mem_buffer *rxb, - struct iwl_device_cmd *cmd) -{ - 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->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"); - } - iwl_rx_statistics(priv, rxb, cmd); - return 0; -} - -/* Handle notification from uCode that card's power state is changing - * due to software, hardware, or critical temperature RFKILL */ -static int iwl_rx_card_state_notif(struct iwl_priv *priv, - struct iwl_rx_mem_buffer *rxb, - struct iwl_device_cmd *cmd) -{ - struct iwl_rx_packet *pkt = rxb_addr(rxb); - u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags); - unsigned long status = priv->shrd->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(bus(priv), CSR_UCODE_DRV_GP1_SET, - CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); - - iwl_write_direct32(bus(priv), HBUS_TARG_MBX_C, - HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED); - - if (!(flags & RXON_CARD_DISABLED)) { - iwl_write32(bus(priv), CSR_UCODE_DRV_GP1_CLR, - CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); - iwl_write_direct32(bus(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->shrd->status); - else - clear_bit(STATUS_RF_KILL_HW, &priv->shrd->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->shrd->status))) - wiphy_rfkill_set_hw_state(priv->hw->wiphy, - test_bit(STATUS_RF_KILL_HW, &priv->shrd->status)); - else - wake_up(&priv->shrd->wait_command_queue); - return 0; -} - -static int iwl_rx_missed_beacon_notif(struct iwl_priv *priv, - struct iwl_rx_mem_buffer *rxb, - struct iwl_device_cmd *cmd) - -{ - 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->shrd->status)) - iwl_init_sensitivity(priv); - } - return 0; -} - -/* 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 int iwl_rx_reply_rx_phy(struct iwl_priv *priv, - struct iwl_rx_mem_buffer *rxb, - struct iwl_device_cmd *cmd) -{ - struct iwl_rx_packet *pkt = rxb_addr(rxb); - - priv->last_phy_res_valid = true; - memcpy(&priv->last_phy_res, pkt->u.raw, - sizeof(struct iwl_rx_phy_res)); - return 0; -} - -/* - * returns non-zero if packet should be dropped - */ -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); - - /* - * All contexts have the same setting here due to it being - * a module parameter, so OK to check any context. - */ - if (priv->contexts[IWL_RXON_CTX_BSS].active.filter_flags & - RXON_FILTER_DIS_DECRYPT_MSK) - return 0; - - if (!(fc & IEEE80211_FCTL_PROTECTED)) - return 0; - - IWL_DEBUG_RX(priv, "decrypt_res:0x%x\n", decrypt_res); - switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) { - case RX_RES_STATUS_SEC_TYPE_TKIP: - /* The uCode has got a bad phase 1 Key, pushes the packet. - * Decryption will be done in SW. */ - if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) == - RX_RES_STATUS_BAD_KEY_TTAK) - break; - - case RX_RES_STATUS_SEC_TYPE_WEP: - if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) == - RX_RES_STATUS_BAD_ICV_MIC) { - /* bad ICV, the packet is destroyed since the - * decryption is inplace, drop it */ - IWL_DEBUG_RX(priv, "Packet destroyed\n"); - return -1; - } - case RX_RES_STATUS_SEC_TYPE_CCMP: - if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) == - RX_RES_STATUS_DECRYPT_OK) { - IWL_DEBUG_RX(priv, "hw decrypt successfully!!!\n"); - stats->flag |= RX_FLAG_DECRYPTED; - } - break; - - default: - break; - } - return 0; -} - -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; - struct iwl_rxon_context *ctx; - - /* 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 (!iwlagn_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); - - /* - * 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_trans_wake_any_queue(trans(priv), ctx->ctxid); - } - } - - memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats)); - - ieee80211_rx(priv->hw, skb); - 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; -} - -/* 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 int iwl_rx_reply_rx(struct iwl_priv *priv, - struct iwl_rx_mem_buffer *rxb, - struct iwl_device_cmd *cmd) -{ - 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->last_phy_res_valid) { - IWL_ERR(priv, "MPDU frame without cached PHY data\n"); - return 0; - } - 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); - 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 0; - } - - 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 0; - } - - /* 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 = 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", - 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); - return 0; -} - -/** - * 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) -{ - int (**handlers)(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb, - struct iwl_device_cmd *cmd); - - handlers = priv->rx_handlers; - - 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; - handlers[REPLY_ADD_STA] = iwl_add_sta_callback; - - /* - * 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; - - /* 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); - -} - -int iwl_rx_dispatch(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb, - struct iwl_device_cmd *cmd) -{ - struct iwl_rx_packet *pkt = rxb_addr(rxb); - int err = 0; - - /* - * 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->rx_handlers_stats[pkt->hdr.cmd]++; - err = priv->rx_handlers[pkt->hdr.cmd] (priv, rxb, cmd); - } 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); - } - return err; -} |