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linux/drivers/net/wireless/iwlwifi/iwl-agn-rx.c
Johannes Berg f8d7c1a18d iwlwifi: move packet to transport 
The base packet structure will (hopefully) be
the same for all transports, but what is in it
differs. Remove the union of all the possible
contents and move the packet itself into the
transport header file. This requires changing
all users of the union to just use pkt->data.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-03-07 13:56:34 -05:00

1188 lines
36 KiB
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/******************************************************************************
*
* Copyright(c) 2003 - 2012 Intel Corporation. All rights reserved.
*
* Portions of this file are derived from the ipw3945 project, as well
* as portionhelp 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-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);
IWL_CMD(REPLY_D3_CONFIG);
default:
return "UNKNOWN";
}
}
/******************************************************************************
*
* Generic RX handler implementations
*
******************************************************************************/
static int iwlagn_rx_reply_error(struct iwl_priv *priv,
struct iwl_rx_cmd_buffer *rxb,
struct iwl_device_cmd *cmd)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_error_resp *err_resp = (void *)pkt->data;
IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
"seq 0x%04X ser 0x%08X\n",
le32_to_cpu(err_resp->error_type),
get_cmd_string(err_resp->cmd_id),
err_resp->cmd_id,
le16_to_cpu(err_resp->bad_cmd_seq_num),
le32_to_cpu(err_resp->error_info));
return 0;
}
static int iwlagn_rx_csa(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
struct iwl_device_cmd *cmd)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_csa_notification *csa = (void *)pkt->data;
/*
* 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 iwlagn_rx_spectrum_measure_notif(struct iwl_priv *priv,
struct iwl_rx_cmd_buffer *rxb,
struct iwl_device_cmd *cmd)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_spectrum_notification *report = (void *)pkt->data;
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 iwlagn_rx_pm_sleep_notif(struct iwl_priv *priv,
struct iwl_rx_cmd_buffer *rxb,
struct iwl_device_cmd *cmd)
{
#ifdef CONFIG_IWLWIFI_DEBUG
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_sleep_notification *sleep = (void *)pkt->data;
IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
sleep->pm_sleep_mode, sleep->pm_wakeup_src);
#endif
return 0;
}
static int iwlagn_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
struct iwl_rx_cmd_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->data, len);
return 0;
}
static int iwlagn_rx_beacon_notif(struct iwl_priv *priv,
struct iwl_rx_cmd_buffer *rxb,
struct iwl_device_cmd *cmd)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwlagn_beacon_notif *beacon = (void *)pkt->data;
#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 iwlagn_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;
lockdep_assert_held(&priv->statistics.lock);
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 iwlagn_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->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 iwlagn_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 && !iwlagn_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 &&
!iwlagn_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 iwlagn_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
iwlagn_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
iwlagn_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 iwlagn_rx_statistics(struct iwl_priv *priv,
struct iwl_rx_cmd_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);
spin_lock(&priv->statistics.lock);
if (len == sizeof(struct iwl_bt_notif_statistics)) {
struct iwl_bt_notif_statistics *stats;
stats = (void *)&pkt->data;
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 = (void *)&pkt->data;
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));
spin_unlock(&priv->statistics.lock);
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);
iwlagn_accumulative_statistics(priv, common, rx_non_phy, rx_ofdm,
rx_ofdm_ht, rx_cck, tx, bt_activity);
iwlagn_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)) {
iwlagn_rx_calc_noise(priv);
queue_work(priv->workqueue, &priv->run_time_calib_work);
}
if (cfg(priv)->lib->temperature && change)
cfg(priv)->lib->temperature(priv);
spin_unlock(&priv->statistics.lock);
return 0;
}
static int iwlagn_rx_reply_statistics(struct iwl_priv *priv,
struct iwl_rx_cmd_buffer *rxb,
struct iwl_device_cmd *cmd)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_notif_statistics *stats = (void *)pkt->data;
if (le32_to_cpu(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");
}
iwlagn_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 iwlagn_rx_card_state_notif(struct iwl_priv *priv,
struct iwl_rx_cmd_buffer *rxb,
struct iwl_device_cmd *cmd)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_card_state_notif *card_state_notif = (void *)pkt->data;
u32 flags = le32_to_cpu(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(trans(priv), CSR_UCODE_DRV_GP1_SET,
CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
iwl_write_direct32(trans(priv), HBUS_TARG_MBX_C,
HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
if (!(flags & RXON_CARD_DISABLED)) {
iwl_write32(trans(priv), CSR_UCODE_DRV_GP1_CLR,
CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
iwl_write_direct32(trans(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 iwlagn_rx_missed_beacon_notif(struct iwl_priv *priv,
struct iwl_rx_cmd_buffer *rxb,
struct iwl_device_cmd *cmd)
{
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->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 iwlagn_rx_reply_rx_phy(struct iwl_priv *priv,
struct iwl_rx_cmd_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->data,
sizeof(struct iwl_rx_phy_res));
return 0;
}
/*
* 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;
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 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;
struct page *p;
int offset;
/* 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 &&
iwlagn_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;
}
offset = (void *)hdr - rxb_addr(rxb);
p = rxb_steal_page(rxb);
skb_add_rx_frag(skb, 0, p, offset, 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,
"channel got active");
}
}
memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
ieee80211_rx(priv->hw, skb);
}
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;
}
/* 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 iwlagn_rx_reply_rx(struct iwl_priv *priv,
struct iwl_rx_cmd_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->data;
header = (struct ieee80211_hdr *)(pkt->data + sizeof(*phy_res)
+ phy_res->cfg_phy_cnt);
len = le16_to_cpu(phy_res->byte_count);
rx_pkt_status = *(__le32 *)(pkt->data + 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->data;
header = (struct ieee80211_hdr *)(pkt->data + sizeof(*amsdu));
len = le16_to_cpu(amsdu->byte_count);
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 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;
iwlagn_pass_packet_to_mac80211(priv, header, len, ampdu_status,
rxb, &rx_status);
return 0;
}
static int iwlagn_rx_noa_notification(struct iwl_priv *priv,
struct iwl_rx_cmd_buffer *rxb,
struct iwl_device_cmd *cmd)
{
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);
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_cmd_buffer *rxb,
struct iwl_device_cmd *cmd);
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;
/* 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 */
iwl_notification_wait_init(&priv->notif_wait);
/* Set up BT Rx handlers */
if (cfg(priv)->lib->bt_rx_handler_setup)
cfg(priv)->lib->bt_rx_handler_setup(priv);
}
int iwl_rx_dispatch(struct iwl_op_mode *op_mode, struct iwl_rx_cmd_buffer *rxb,
struct iwl_device_cmd *cmd)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
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.
*/
iwl_notification_wait_notify(&priv->notif_wait, pkt);
if (priv->pre_rx_handler &&
priv->ucode_owner == IWL_OWNERSHIP_TM)
priv->pre_rx_handler(priv, rxb);
else {
/* 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;
}
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