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1027 lines
31 KiB
1027 lines
31 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/****************************************************************************** |
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* |
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* Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved. |
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* Copyright(c) 2015 Intel Deutschland GmbH |
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* Copyright(c) 2018, 2020 Intel Corporation |
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* |
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* Portions of this file are derived from the ipw3945 project, as well |
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* as portionhelp of the ieee80211 subsystem header files. |
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* |
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* Contact Information: |
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* Intel Linux Wireless <[email protected]> |
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
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* |
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*****************************************************************************/ |
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|
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#include <linux/etherdevice.h> |
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#include <linux/slab.h> |
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#include <linux/sched.h> |
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#include <net/mac80211.h> |
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#include <asm/unaligned.h> |
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|
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#include "iwl-trans.h" |
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#include "iwl-io.h" |
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#include "dev.h" |
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#include "calib.h" |
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#include "agn.h" |
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|
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/****************************************************************************** |
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* |
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* Generic RX handler implementations |
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* |
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******************************************************************************/ |
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|
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static void iwlagn_rx_reply_error(struct iwl_priv *priv, |
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struct iwl_rx_cmd_buffer *rxb) |
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{ |
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struct iwl_rx_packet *pkt = rxb_addr(rxb); |
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struct iwl_error_resp *err_resp = (void *)pkt->data; |
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|
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IWL_ERR(priv, "Error Reply type 0x%08X cmd REPLY_ERROR (0x%02X) " |
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"seq 0x%04X ser 0x%08X\n", |
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le32_to_cpu(err_resp->error_type), |
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err_resp->cmd_id, |
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le16_to_cpu(err_resp->bad_cmd_seq_num), |
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le32_to_cpu(err_resp->error_info)); |
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} |
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static void iwlagn_rx_csa(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb) |
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{ |
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struct iwl_rx_packet *pkt = rxb_addr(rxb); |
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struct iwl_csa_notification *csa = (void *)pkt->data; |
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/* |
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* MULTI-FIXME |
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* See iwlagn_mac_channel_switch. |
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*/ |
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struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; |
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struct iwl_rxon_cmd *rxon = (void *)&ctx->active; |
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|
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if (!test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) |
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return; |
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if (!le32_to_cpu(csa->status) && csa->channel == priv->switch_channel) { |
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rxon->channel = csa->channel; |
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ctx->staging.channel = csa->channel; |
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IWL_DEBUG_11H(priv, "CSA notif: channel %d\n", |
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le16_to_cpu(csa->channel)); |
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iwl_chswitch_done(priv, true); |
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} else { |
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IWL_ERR(priv, "CSA notif (fail) : channel %d\n", |
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le16_to_cpu(csa->channel)); |
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iwl_chswitch_done(priv, false); |
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} |
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} |
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static void iwlagn_rx_spectrum_measure_notif(struct iwl_priv *priv, |
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struct iwl_rx_cmd_buffer *rxb) |
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{ |
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struct iwl_rx_packet *pkt = rxb_addr(rxb); |
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struct iwl_spectrum_notification *report = (void *)pkt->data; |
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|
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if (!report->state) { |
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IWL_DEBUG_11H(priv, |
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"Spectrum Measure Notification: Start\n"); |
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return; |
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} |
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|
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memcpy(&priv->measure_report, report, sizeof(*report)); |
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priv->measurement_status |= MEASUREMENT_READY; |
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} |
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static void iwlagn_rx_pm_sleep_notif(struct iwl_priv *priv, |
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struct iwl_rx_cmd_buffer *rxb) |
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{ |
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#ifdef CONFIG_IWLWIFI_DEBUG |
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struct iwl_rx_packet *pkt = rxb_addr(rxb); |
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struct iwl_sleep_notification *sleep = (void *)pkt->data; |
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IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n", |
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sleep->pm_sleep_mode, sleep->pm_wakeup_src); |
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#endif |
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} |
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static void iwlagn_rx_pm_debug_statistics_notif(struct iwl_priv *priv, |
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struct iwl_rx_cmd_buffer *rxb) |
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{ |
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struct iwl_rx_packet *pkt = rxb_addr(rxb); |
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u32 __maybe_unused len = iwl_rx_packet_len(pkt); |
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IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled " |
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"notification for PM_DEBUG_STATISTIC_NOTIFIC:\n", len); |
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iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->data, len); |
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} |
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static void iwlagn_rx_beacon_notif(struct iwl_priv *priv, |
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struct iwl_rx_cmd_buffer *rxb) |
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{ |
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struct iwl_rx_packet *pkt = rxb_addr(rxb); |
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struct iwlagn_beacon_notif *beacon = (void *)pkt->data; |
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#ifdef CONFIG_IWLWIFI_DEBUG |
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u16 status = le16_to_cpu(beacon->beacon_notify_hdr.status.status); |
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u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags); |
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IWL_DEBUG_RX(priv, "beacon status %#x, retries:%d ibssmgr:%d " |
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"tsf:0x%.8x%.8x rate:%d\n", |
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status & TX_STATUS_MSK, |
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beacon->beacon_notify_hdr.failure_frame, |
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le32_to_cpu(beacon->ibss_mgr_status), |
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le32_to_cpu(beacon->high_tsf), |
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le32_to_cpu(beacon->low_tsf), rate); |
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#endif |
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priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status); |
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} |
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/* |
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* iwl_good_plcp_health - checks for plcp error. |
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* |
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* When the plcp error is exceeding the thresholds, reset the radio |
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* to improve the throughput. |
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*/ |
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static bool iwlagn_good_plcp_health(struct iwl_priv *priv, |
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struct statistics_rx_phy *cur_ofdm, |
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struct statistics_rx_ht_phy *cur_ofdm_ht, |
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unsigned int msecs) |
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{ |
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int delta; |
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int threshold = priv->plcp_delta_threshold; |
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|
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if (threshold == IWL_MAX_PLCP_ERR_THRESHOLD_DISABLE) { |
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IWL_DEBUG_RADIO(priv, "plcp_err check disabled\n"); |
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return true; |
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} |
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delta = le32_to_cpu(cur_ofdm->plcp_err) - |
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le32_to_cpu(priv->statistics.rx_ofdm.plcp_err) + |
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le32_to_cpu(cur_ofdm_ht->plcp_err) - |
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le32_to_cpu(priv->statistics.rx_ofdm_ht.plcp_err); |
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/* Can be negative if firmware reset statistics */ |
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if (delta <= 0) |
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return true; |
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if ((delta * 100 / msecs) > threshold) { |
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IWL_DEBUG_RADIO(priv, |
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"plcp health threshold %u delta %d msecs %u\n", |
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threshold, delta, msecs); |
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return false; |
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} |
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return true; |
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} |
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int iwl_force_rf_reset(struct iwl_priv *priv, bool external) |
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{ |
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struct iwl_rf_reset *rf_reset; |
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|
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if (test_bit(STATUS_EXIT_PENDING, &priv->status)) |
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return -EAGAIN; |
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if (!iwl_is_any_associated(priv)) { |
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IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n"); |
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return -ENOLINK; |
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} |
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rf_reset = &priv->rf_reset; |
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rf_reset->reset_request_count++; |
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if (!external && rf_reset->last_reset_jiffies && |
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time_after(rf_reset->last_reset_jiffies + |
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IWL_DELAY_NEXT_FORCE_RF_RESET, jiffies)) { |
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IWL_DEBUG_INFO(priv, "RF reset rejected\n"); |
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rf_reset->reset_reject_count++; |
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return -EAGAIN; |
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} |
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rf_reset->reset_success_count++; |
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rf_reset->last_reset_jiffies = jiffies; |
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/* |
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* There is no easy and better way to force reset the radio, |
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* the only known method is switching channel which will force to |
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* reset and tune the radio. |
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* Use internal short scan (single channel) operation to should |
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* achieve this objective. |
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* Driver should reset the radio when number of consecutive missed |
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* beacon, or any other uCode error condition detected. |
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*/ |
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IWL_DEBUG_INFO(priv, "perform radio reset.\n"); |
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iwl_internal_short_hw_scan(priv); |
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return 0; |
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} |
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static void iwlagn_recover_from_statistics(struct iwl_priv *priv, |
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struct statistics_rx_phy *cur_ofdm, |
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struct statistics_rx_ht_phy *cur_ofdm_ht, |
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struct statistics_tx *tx, |
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unsigned long stamp) |
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{ |
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unsigned int msecs; |
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|
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if (test_bit(STATUS_EXIT_PENDING, &priv->status)) |
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return; |
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msecs = jiffies_to_msecs(stamp - priv->rx_statistics_jiffies); |
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/* Only gather statistics and update time stamp when not associated */ |
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if (!iwl_is_any_associated(priv)) |
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return; |
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/* Do not check/recover when do not have enough statistics data */ |
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if (msecs < 99) |
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return; |
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if (!iwlagn_good_plcp_health(priv, cur_ofdm, cur_ofdm_ht, msecs)) |
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iwl_force_rf_reset(priv, false); |
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} |
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/* Calculate noise level, based on measurements during network silence just |
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* before arriving beacon. This measurement can be done only if we know |
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* exactly when to expect beacons, therefore only when we're associated. */ |
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static void iwlagn_rx_calc_noise(struct iwl_priv *priv) |
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{ |
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struct statistics_rx_non_phy *rx_info; |
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int num_active_rx = 0; |
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int total_silence = 0; |
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int bcn_silence_a, bcn_silence_b, bcn_silence_c; |
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int last_rx_noise; |
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rx_info = &priv->statistics.rx_non_phy; |
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bcn_silence_a = |
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le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER; |
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bcn_silence_b = |
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le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER; |
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bcn_silence_c = |
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le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER; |
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if (bcn_silence_a) { |
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total_silence += bcn_silence_a; |
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num_active_rx++; |
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} |
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if (bcn_silence_b) { |
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total_silence += bcn_silence_b; |
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num_active_rx++; |
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} |
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if (bcn_silence_c) { |
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total_silence += bcn_silence_c; |
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num_active_rx++; |
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} |
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/* Average among active antennas */ |
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if (num_active_rx) |
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last_rx_noise = (total_silence / num_active_rx) - 107; |
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else |
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last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE; |
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IWL_DEBUG_CALIB(priv, "inband silence a %u, b %u, c %u, dBm %d\n", |
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bcn_silence_a, bcn_silence_b, bcn_silence_c, |
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last_rx_noise); |
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} |
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#ifdef CONFIG_IWLWIFI_DEBUGFS |
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/* |
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* based on the assumption of all statistics counter are in DWORD |
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* FIXME: This function is for debugging, do not deal with |
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* the case of counters roll-over. |
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*/ |
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static void accum_stats(__le32 *prev, __le32 *cur, __le32 *delta, |
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__le32 *max_delta, __le32 *accum, int size) |
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{ |
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int i; |
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|
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for (i = 0; |
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i < size / sizeof(__le32); |
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i++, prev++, cur++, delta++, max_delta++, accum++) { |
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if (le32_to_cpu(*cur) > le32_to_cpu(*prev)) { |
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*delta = cpu_to_le32( |
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le32_to_cpu(*cur) - le32_to_cpu(*prev)); |
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le32_add_cpu(accum, le32_to_cpu(*delta)); |
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if (le32_to_cpu(*delta) > le32_to_cpu(*max_delta)) |
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*max_delta = *delta; |
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} |
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} |
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} |
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static void |
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iwlagn_accumulative_statistics(struct iwl_priv *priv, |
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struct statistics_general_common *common, |
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struct statistics_rx_non_phy *rx_non_phy, |
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struct statistics_rx_phy *rx_ofdm, |
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struct statistics_rx_ht_phy *rx_ofdm_ht, |
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struct statistics_rx_phy *rx_cck, |
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struct statistics_tx *tx, |
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struct statistics_bt_activity *bt_activity) |
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{ |
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#define ACCUM(_name) \ |
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accum_stats((__le32 *)&priv->statistics._name, \ |
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(__le32 *)_name, \ |
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(__le32 *)&priv->delta_stats._name, \ |
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(__le32 *)&priv->max_delta_stats._name, \ |
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(__le32 *)&priv->accum_stats._name, \ |
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sizeof(*_name)); |
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ACCUM(common); |
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ACCUM(rx_non_phy); |
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ACCUM(rx_ofdm); |
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ACCUM(rx_ofdm_ht); |
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ACCUM(rx_cck); |
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ACCUM(tx); |
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if (bt_activity) |
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ACCUM(bt_activity); |
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#undef ACCUM |
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} |
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#else |
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static inline void |
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iwlagn_accumulative_statistics(struct iwl_priv *priv, |
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struct statistics_general_common *common, |
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struct statistics_rx_non_phy *rx_non_phy, |
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struct statistics_rx_phy *rx_ofdm, |
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struct statistics_rx_ht_phy *rx_ofdm_ht, |
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struct statistics_rx_phy *rx_cck, |
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struct statistics_tx *tx, |
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struct statistics_bt_activity *bt_activity) |
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{ |
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} |
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#endif |
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static void iwlagn_rx_statistics(struct iwl_priv *priv, |
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struct iwl_rx_cmd_buffer *rxb) |
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{ |
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unsigned long stamp = jiffies; |
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const int reg_recalib_period = 60; |
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int change; |
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struct iwl_rx_packet *pkt = rxb_addr(rxb); |
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u32 len = iwl_rx_packet_payload_len(pkt); |
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__le32 *flag; |
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struct statistics_general_common *common; |
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struct statistics_rx_non_phy *rx_non_phy; |
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struct statistics_rx_phy *rx_ofdm; |
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struct statistics_rx_ht_phy *rx_ofdm_ht; |
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struct statistics_rx_phy *rx_cck; |
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struct statistics_tx *tx; |
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struct statistics_bt_activity *bt_activity; |
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|
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IWL_DEBUG_RX(priv, "Statistics notification received (%d bytes).\n", |
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len); |
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|
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spin_lock(&priv->statistics.lock); |
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|
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if (len == sizeof(struct iwl_bt_notif_statistics)) { |
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struct iwl_bt_notif_statistics *stats; |
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stats = (void *)&pkt->data; |
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flag = &stats->flag; |
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common = &stats->general.common; |
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rx_non_phy = &stats->rx.general.common; |
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rx_ofdm = &stats->rx.ofdm; |
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rx_ofdm_ht = &stats->rx.ofdm_ht; |
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rx_cck = &stats->rx.cck; |
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tx = &stats->tx; |
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bt_activity = &stats->general.activity; |
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|
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#ifdef CONFIG_IWLWIFI_DEBUGFS |
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/* handle this exception directly */ |
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priv->statistics.num_bt_kills = stats->rx.general.num_bt_kills; |
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le32_add_cpu(&priv->statistics.accum_num_bt_kills, |
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le32_to_cpu(stats->rx.general.num_bt_kills)); |
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#endif |
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} else if (len == sizeof(struct iwl_notif_statistics)) { |
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struct iwl_notif_statistics *stats; |
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stats = (void *)&pkt->data; |
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flag = &stats->flag; |
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common = &stats->general.common; |
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rx_non_phy = &stats->rx.general; |
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rx_ofdm = &stats->rx.ofdm; |
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rx_ofdm_ht = &stats->rx.ofdm_ht; |
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rx_cck = &stats->rx.cck; |
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tx = &stats->tx; |
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bt_activity = NULL; |
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} else { |
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WARN_ONCE(1, "len %d doesn't match BT (%zu) or normal (%zu)\n", |
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len, sizeof(struct iwl_bt_notif_statistics), |
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sizeof(struct iwl_notif_statistics)); |
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spin_unlock(&priv->statistics.lock); |
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return; |
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} |
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|
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change = common->temperature != priv->statistics.common.temperature || |
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(*flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK) != |
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(priv->statistics.flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK); |
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|
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iwlagn_accumulative_statistics(priv, common, rx_non_phy, rx_ofdm, |
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rx_ofdm_ht, rx_cck, tx, bt_activity); |
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|
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iwlagn_recover_from_statistics(priv, rx_ofdm, rx_ofdm_ht, tx, stamp); |
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|
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priv->statistics.flag = *flag; |
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memcpy(&priv->statistics.common, common, sizeof(*common)); |
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memcpy(&priv->statistics.rx_non_phy, rx_non_phy, sizeof(*rx_non_phy)); |
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memcpy(&priv->statistics.rx_ofdm, rx_ofdm, sizeof(*rx_ofdm)); |
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memcpy(&priv->statistics.rx_ofdm_ht, rx_ofdm_ht, sizeof(*rx_ofdm_ht)); |
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memcpy(&priv->statistics.rx_cck, rx_cck, sizeof(*rx_cck)); |
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memcpy(&priv->statistics.tx, tx, sizeof(*tx)); |
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#ifdef CONFIG_IWLWIFI_DEBUGFS |
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if (bt_activity) |
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memcpy(&priv->statistics.bt_activity, bt_activity, |
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sizeof(*bt_activity)); |
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#endif |
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|
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priv->rx_statistics_jiffies = stamp; |
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|
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set_bit(STATUS_STATISTICS, &priv->status); |
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|
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/* Reschedule the statistics timer to occur in |
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* reg_recalib_period seconds to ensure we get a |
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* thermal update even if the uCode doesn't give |
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* us one */ |
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mod_timer(&priv->statistics_periodic, jiffies + |
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msecs_to_jiffies(reg_recalib_period * 1000)); |
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|
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if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) && |
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(pkt->hdr.cmd == STATISTICS_NOTIFICATION)) { |
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iwlagn_rx_calc_noise(priv); |
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queue_work(priv->workqueue, &priv->run_time_calib_work); |
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} |
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if (priv->lib->temperature && change) |
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priv->lib->temperature(priv); |
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|
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spin_unlock(&priv->statistics.lock); |
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} |
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|
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static void iwlagn_rx_reply_statistics(struct iwl_priv *priv, |
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struct iwl_rx_cmd_buffer *rxb) |
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{ |
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struct iwl_rx_packet *pkt = rxb_addr(rxb); |
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struct iwl_notif_statistics *stats = (void *)pkt->data; |
|
|
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if (le32_to_cpu(stats->flag) & UCODE_STATISTICS_CLEAR_MSK) { |
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#ifdef CONFIG_IWLWIFI_DEBUGFS |
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memset(&priv->accum_stats, 0, |
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sizeof(priv->accum_stats)); |
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memset(&priv->delta_stats, 0, |
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sizeof(priv->delta_stats)); |
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memset(&priv->max_delta_stats, 0, |
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sizeof(priv->max_delta_stats)); |
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#endif |
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IWL_DEBUG_RX(priv, "Statistics have been cleared\n"); |
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} |
|
|
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iwlagn_rx_statistics(priv, rxb); |
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} |
|
|
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/* Handle notification from uCode that card's power state is changing |
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* due to software, hardware, or critical temperature RFKILL */ |
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static void iwlagn_rx_card_state_notif(struct iwl_priv *priv, |
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struct iwl_rx_cmd_buffer *rxb) |
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{ |
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struct iwl_rx_packet *pkt = rxb_addr(rxb); |
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struct iwl_card_state_notif *card_state_notif = (void *)pkt->data; |
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u32 flags = le32_to_cpu(card_state_notif->flags); |
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unsigned long status = priv->status; |
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|
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IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s CT:%s\n", |
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(flags & HW_CARD_DISABLED) ? "Kill" : "On", |
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(flags & SW_CARD_DISABLED) ? "Kill" : "On", |
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(flags & CT_CARD_DISABLED) ? |
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"Reached" : "Not reached"); |
|
|
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if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED | |
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CT_CARD_DISABLED)) { |
|
|
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iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET, |
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CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); |
|
|
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iwl_write_direct32(priv->trans, HBUS_TARG_MBX_C, |
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HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED); |
|
|
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if (!(flags & RXON_CARD_DISABLED)) { |
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iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR, |
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CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); |
|
iwl_write_direct32(priv->trans, 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)); |
|
} |
|
|
|
static void iwlagn_rx_missed_beacon_notif(struct iwl_priv *priv, |
|
struct iwl_rx_cmd_buffer *rxb) |
|
|
|
{ |
|
struct iwl_rx_packet *pkt = rxb_addr(rxb); |
|
struct iwl_missed_beacon_notif *missed_beacon = (void *)pkt->data; |
|
|
|
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); |
|
} |
|
} |
|
|
|
/* 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 iwlagn_rx_reply_rx_phy(struct iwl_priv *priv, |
|
struct iwl_rx_cmd_buffer *rxb) |
|
{ |
|
struct iwl_rx_packet *pkt = rxb_addr(rxb); |
|
|
|
priv->last_phy_res_valid = true; |
|
priv->ampdu_ref++; |
|
memcpy(&priv->last_phy_res, pkt->data, |
|
sizeof(struct iwl_rx_phy_res)); |
|
} |
|
|
|
/* |
|
* returns non-zero if packet should be dropped |
|
*/ |
|
static int iwlagn_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; |
|
fallthrough; |
|
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; |
|
} |
|
fallthrough; |
|
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 iwlagn_pass_packet_to_mac80211(struct iwl_priv *priv, |
|
struct ieee80211_hdr *hdr, |
|
u16 len, |
|
u32 ampdu_status, |
|
struct iwl_rx_cmd_buffer *rxb, |
|
struct ieee80211_rx_status *stats) |
|
{ |
|
struct sk_buff *skb; |
|
__le16 fc = hdr->frame_control; |
|
struct iwl_rxon_context *ctx; |
|
unsigned int hdrlen, fraglen; |
|
|
|
/* 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 (!iwlwifi_mod_params.swcrypto && |
|
iwlagn_set_decrypted_flag(priv, hdr, ampdu_status, stats)) |
|
return; |
|
|
|
/* Dont use dev_alloc_skb(), we'll have enough headroom once |
|
* ieee80211_hdr pulled. |
|
*/ |
|
skb = alloc_skb(128, GFP_ATOMIC); |
|
if (!skb) { |
|
IWL_ERR(priv, "alloc_skb failed\n"); |
|
return; |
|
} |
|
/* If frame is small enough to fit in skb->head, pull it completely. |
|
* If not, only pull ieee80211_hdr so that splice() or TCP coalesce |
|
* are more efficient. |
|
*/ |
|
hdrlen = (len <= skb_tailroom(skb)) ? len : sizeof(*hdr); |
|
|
|
skb_put_data(skb, hdr, hdrlen); |
|
fraglen = len - hdrlen; |
|
|
|
if (fraglen) { |
|
int offset = (void *)hdr + hdrlen - |
|
rxb_addr(rxb) + rxb_offset(rxb); |
|
|
|
skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset, |
|
fraglen, rxb->truesize); |
|
} |
|
|
|
/* |
|
* 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) && priv->passive_no_rx)) { |
|
for_each_context(priv, ctx) { |
|
if (!ether_addr_equal(hdr->addr3, |
|
ctx->active.bssid_addr)) |
|
continue; |
|
iwlagn_lift_passive_no_rx(priv); |
|
} |
|
} |
|
|
|
memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats)); |
|
|
|
ieee80211_rx_napi(priv->hw, NULL, skb, priv->napi); |
|
} |
|
|
|
static u32 iwlagn_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in) |
|
{ |
|
u32 decrypt_out = 0; |
|
|
|
if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) == |
|
RX_RES_STATUS_STATION_FOUND) |
|
decrypt_out |= (RX_RES_STATUS_STATION_FOUND | |
|
RX_RES_STATUS_NO_STATION_INFO_MISMATCH); |
|
|
|
decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK); |
|
|
|
/* packet was not encrypted */ |
|
if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) == |
|
RX_RES_STATUS_SEC_TYPE_NONE) |
|
return decrypt_out; |
|
|
|
/* packet was encrypted with unknown alg */ |
|
if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) == |
|
RX_RES_STATUS_SEC_TYPE_ERR) |
|
return decrypt_out; |
|
|
|
/* decryption was not done in HW */ |
|
if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) != |
|
RX_MPDU_RES_STATUS_DEC_DONE_MSK) |
|
return decrypt_out; |
|
|
|
switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) { |
|
|
|
case RX_RES_STATUS_SEC_TYPE_CCMP: |
|
/* alg is CCM: check MIC only */ |
|
if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK)) |
|
/* Bad MIC */ |
|
decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC; |
|
else |
|
decrypt_out |= RX_RES_STATUS_DECRYPT_OK; |
|
|
|
break; |
|
|
|
case RX_RES_STATUS_SEC_TYPE_TKIP: |
|
if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) { |
|
/* Bad TTAK */ |
|
decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK; |
|
break; |
|
} |
|
fallthrough; |
|
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_MPDU_CMD */ |
|
static void iwlagn_rx_reply_rx(struct iwl_priv *priv, |
|
struct iwl_rx_cmd_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, pkt_len = iwl_rx_packet_len(pkt); |
|
u32 ampdu_status; |
|
u32 rate_n_flags; |
|
|
|
if (!priv->last_phy_res_valid) { |
|
IWL_ERR(priv, "MPDU frame without cached PHY data\n"); |
|
return; |
|
} |
|
|
|
if (unlikely(pkt_len < sizeof(*amsdu))) { |
|
IWL_DEBUG_DROP(priv, "Bad REPLY_RX_MPDU_CMD size\n"); |
|
return; |
|
} |
|
|
|
phy_res = &priv->last_phy_res; |
|
amsdu = (struct iwl_rx_mpdu_res_start *)pkt->data; |
|
header = (struct ieee80211_hdr *)(pkt->data + sizeof(*amsdu)); |
|
len = le16_to_cpu(amsdu->byte_count); |
|
|
|
if (unlikely(len + sizeof(*amsdu) + sizeof(__le32) > pkt_len)) { |
|
IWL_DEBUG_DROP(priv, "FW lied about packet len\n"); |
|
return; |
|
} |
|
|
|
rx_pkt_status = *(__le32 *)(pkt->data + sizeof(*amsdu) + len); |
|
ampdu_status = iwlagn_translate_rx_status(priv, |
|
le32_to_cpu(rx_pkt_status)); |
|
|
|
if ((unlikely(phy_res->cfg_phy_cnt > 20))) { |
|
IWL_DEBUG_DROP(priv, "dsp size out of range [0,20]: %d\n", |
|
phy_res->cfg_phy_cnt); |
|
return; |
|
} |
|
|
|
if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) || |
|
!(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) { |
|
IWL_DEBUG_RX(priv, "Bad CRC or FIFO: 0x%08X.\n", |
|
le32_to_cpu(rx_pkt_status)); |
|
return; |
|
} |
|
|
|
/* This will be used in several places later */ |
|
rate_n_flags = le32_to_cpu(phy_res->rate_n_flags); |
|
|
|
/* rx_status carries information about the packet to mac80211 */ |
|
rx_status.mactime = le64_to_cpu(phy_res->timestamp); |
|
rx_status.band = (phy_res->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ? |
|
NL80211_BAND_2GHZ : NL80211_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_START;*/ |
|
|
|
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_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.enc_flags |= RX_ENC_FLAG_SHORTPRE; |
|
|
|
if (phy_res->phy_flags & RX_RES_PHY_FLAGS_AGG_MSK) { |
|
/* |
|
* We know which subframes of an A-MPDU belong |
|
* together since we get a single PHY response |
|
* from the firmware for all of them |
|
*/ |
|
rx_status.flag |= RX_FLAG_AMPDU_DETAILS; |
|
rx_status.ampdu_reference = priv->ampdu_ref; |
|
} |
|
|
|
/* Set up the HT phy flags */ |
|
if (rate_n_flags & RATE_MCS_HT_MSK) |
|
rx_status.encoding = RX_ENC_HT; |
|
if (rate_n_flags & RATE_MCS_HT40_MSK) |
|
rx_status.bw = RATE_INFO_BW_40; |
|
else |
|
rx_status.bw = RATE_INFO_BW_20; |
|
if (rate_n_flags & RATE_MCS_SGI_MSK) |
|
rx_status.enc_flags |= RX_ENC_FLAG_SHORT_GI; |
|
if (rate_n_flags & RATE_MCS_GF_MSK) |
|
rx_status.enc_flags |= RX_ENC_FLAG_HT_GF; |
|
|
|
iwlagn_pass_packet_to_mac80211(priv, header, len, ampdu_status, |
|
rxb, &rx_status); |
|
} |
|
|
|
static void iwlagn_rx_noa_notification(struct iwl_priv *priv, |
|
struct iwl_rx_cmd_buffer *rxb) |
|
{ |
|
struct iwl_wipan_noa_data *new_data, *old_data; |
|
struct iwl_rx_packet *pkt = rxb_addr(rxb); |
|
struct iwl_wipan_noa_notification *noa_notif = (void *)pkt->data; |
|
|
|
/* no condition -- we're in softirq */ |
|
old_data = rcu_dereference_protected(priv->noa_data, true); |
|
|
|
if (noa_notif->noa_active) { |
|
u32 len = le16_to_cpu(noa_notif->noa_attribute.length); |
|
u32 copylen = len; |
|
|
|
/* EID, len, OUI, subtype */ |
|
len += 1 + 1 + 3 + 1; |
|
/* P2P id, P2P length */ |
|
len += 1 + 2; |
|
copylen += 1 + 2; |
|
|
|
new_data = kmalloc(sizeof(*new_data) + len, GFP_ATOMIC); |
|
if (new_data) { |
|
new_data->length = len; |
|
new_data->data[0] = WLAN_EID_VENDOR_SPECIFIC; |
|
new_data->data[1] = len - 2; /* not counting EID, len */ |
|
new_data->data[2] = (WLAN_OUI_WFA >> 16) & 0xff; |
|
new_data->data[3] = (WLAN_OUI_WFA >> 8) & 0xff; |
|
new_data->data[4] = (WLAN_OUI_WFA >> 0) & 0xff; |
|
new_data->data[5] = WLAN_OUI_TYPE_WFA_P2P; |
|
memcpy(&new_data->data[6], &noa_notif->noa_attribute, |
|
copylen); |
|
} |
|
} else |
|
new_data = NULL; |
|
|
|
rcu_assign_pointer(priv->noa_data, new_data); |
|
|
|
if (old_data) |
|
kfree_rcu(old_data, rcu_head); |
|
} |
|
|
|
/* |
|
* 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_cmd_buffer *rxb); |
|
|
|
handlers = priv->rx_handlers; |
|
|
|
handlers[REPLY_ERROR] = iwlagn_rx_reply_error; |
|
handlers[CHANNEL_SWITCH_NOTIFICATION] = iwlagn_rx_csa; |
|
handlers[SPECTRUM_MEASURE_NOTIFICATION] = |
|
iwlagn_rx_spectrum_measure_notif; |
|
handlers[PM_SLEEP_NOTIFICATION] = iwlagn_rx_pm_sleep_notif; |
|
handlers[PM_DEBUG_STATISTIC_NOTIFIC] = |
|
iwlagn_rx_pm_debug_statistics_notif; |
|
handlers[BEACON_NOTIFICATION] = iwlagn_rx_beacon_notif; |
|
handlers[REPLY_ADD_STA] = iwl_add_sta_callback; |
|
|
|
handlers[REPLY_WIPAN_NOA_NOTIFICATION] = iwlagn_rx_noa_notification; |
|
|
|
/* |
|
* 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] = iwlagn_rx_reply_statistics; |
|
handlers[STATISTICS_NOTIFICATION] = iwlagn_rx_statistics; |
|
|
|
iwl_setup_rx_scan_handlers(priv); |
|
|
|
handlers[CARD_STATE_NOTIFICATION] = iwlagn_rx_card_state_notif; |
|
handlers[MISSED_BEACONS_NOTIFICATION] = |
|
iwlagn_rx_missed_beacon_notif; |
|
|
|
/* Rx handlers */ |
|
handlers[REPLY_RX_PHY_CMD] = iwlagn_rx_reply_rx_phy; |
|
handlers[REPLY_RX_MPDU_CMD] = iwlagn_rx_reply_rx; |
|
|
|
/* block ack */ |
|
handlers[REPLY_COMPRESSED_BA] = |
|
iwlagn_rx_reply_compressed_ba; |
|
|
|
priv->rx_handlers[REPLY_TX] = iwlagn_rx_reply_tx; |
|
|
|
/* set up notification wait support */ |
|
iwl_notification_wait_init(&priv->notif_wait); |
|
|
|
/* Set up BT Rx handlers */ |
|
if (priv->lib->bt_params) |
|
iwlagn_bt_rx_handler_setup(priv); |
|
} |
|
|
|
void iwl_rx_dispatch(struct iwl_op_mode *op_mode, struct napi_struct *napi, |
|
struct iwl_rx_cmd_buffer *rxb) |
|
{ |
|
struct iwl_rx_packet *pkt = rxb_addr(rxb); |
|
struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode); |
|
|
|
/* |
|
* 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. |
|
*/ |
|
iwl_notification_wait_notify(&priv->notif_wait, pkt); |
|
|
|
/* 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]++; |
|
priv->rx_handlers[pkt->hdr.cmd](priv, rxb); |
|
} else { |
|
/* No handling needed */ |
|
IWL_DEBUG_RX(priv, "No handler needed for %s, 0x%02x\n", |
|
iwl_get_cmd_string(priv->trans, |
|
iwl_cmd_id(pkt->hdr.cmd, |
|
0, 0)), |
|
pkt->hdr.cmd); |
|
} |
|
}
|
|
|