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-rw-r--r--drivers/net/wireless/iwlwifi/iwl-1000.c2
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-3945.c2
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-4965.c1
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-5000.c7
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-6000.c6
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-core.h3
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-debug.h1
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-debugfs.c44
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-dev.h12
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-rx.c54
10 files changed, 132 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-1000.c b/drivers/net/wireless/iwlwifi/iwl-1000.c
index d5c6edb..85162e2 100644
--- a/drivers/net/wireless/iwlwifi/iwl-1000.c
+++ b/drivers/net/wireless/iwlwifi/iwl-1000.c
@@ -175,6 +175,7 @@ struct iwl_cfg iwl1000_bgn_cfg = {
.use_rts_for_ht = true, /* use rts/cts protection */
.chain_noise_num_beacons = IWL_CAL_NUM_BEACONS,
.support_ct_kill_exit = true,
+ .plcp_delta_threshold = IWL_MAX_PLCP_ERR_THRESHOLD_DEF,
};
struct iwl_cfg iwl1000_bg_cfg = {
@@ -201,6 +202,7 @@ struct iwl_cfg iwl1000_bg_cfg = {
.led_compensation = 51,
.chain_noise_num_beacons = IWL_CAL_NUM_BEACONS,
.support_ct_kill_exit = true,
+ .plcp_delta_threshold = IWL_MAX_PLCP_ERR_THRESHOLD_DEF,
};
MODULE_FIRMWARE(IWL1000_MODULE_FIRMWARE(IWL1000_UCODE_API_MAX));
diff --git a/drivers/net/wireless/iwlwifi/iwl-3945.c b/drivers/net/wireless/iwlwifi/iwl-3945.c
index 6472910..764479f 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945.c
+++ b/drivers/net/wireless/iwlwifi/iwl-3945.c
@@ -2830,6 +2830,7 @@ static struct iwl_cfg iwl3945_bg_cfg = {
.ht_greenfield_support = false,
.led_compensation = 64,
.broken_powersave = true,
+ .plcp_delta_threshold = IWL_MAX_PLCP_ERR_THRESHOLD_DEF,
};
static struct iwl_cfg iwl3945_abg_cfg = {
@@ -2847,6 +2848,7 @@ static struct iwl_cfg iwl3945_abg_cfg = {
.ht_greenfield_support = false,
.led_compensation = 64,
.broken_powersave = true,
+ .plcp_delta_threshold = IWL_MAX_PLCP_ERR_THRESHOLD_DEF,
};
struct pci_device_id iwl3945_hw_card_ids[] = {
diff --git a/drivers/net/wireless/iwlwifi/iwl-4965.c b/drivers/net/wireless/iwlwifi/iwl-4965.c
index 8159a0f..c36fef9 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965.c
+++ b/drivers/net/wireless/iwlwifi/iwl-4965.c
@@ -2239,6 +2239,7 @@ struct iwl_cfg iwl4965_agn_cfg = {
.broken_powersave = true,
.led_compensation = 61,
.chain_noise_num_beacons = IWL4965_CAL_NUM_BEACONS,
+ .plcp_delta_threshold = IWL_MAX_PLCP_ERR_THRESHOLD_DEF,
};
/* Module firmware */
diff --git a/drivers/net/wireless/iwlwifi/iwl-5000.c b/drivers/net/wireless/iwlwifi/iwl-5000.c
index aab6cf2..cbbc0e4 100644
--- a/drivers/net/wireless/iwlwifi/iwl-5000.c
+++ b/drivers/net/wireless/iwlwifi/iwl-5000.c
@@ -1603,6 +1603,7 @@ struct iwl_cfg iwl5300_agn_cfg = {
.led_compensation = 51,
.use_rts_for_ht = true, /* use rts/cts protection */
.chain_noise_num_beacons = IWL_CAL_NUM_BEACONS,
+ .plcp_delta_threshold = IWL_MAX_PLCP_ERR_LONG_THRESHOLD_DEF,
};
struct iwl_cfg iwl5100_bgn_cfg = {
@@ -1627,6 +1628,7 @@ struct iwl_cfg iwl5100_bgn_cfg = {
.led_compensation = 51,
.use_rts_for_ht = true, /* use rts/cts protection */
.chain_noise_num_beacons = IWL_CAL_NUM_BEACONS,
+ .plcp_delta_threshold = IWL_MAX_PLCP_ERR_LONG_THRESHOLD_DEF,
};
struct iwl_cfg iwl5100_abg_cfg = {
@@ -1649,6 +1651,7 @@ struct iwl_cfg iwl5100_abg_cfg = {
.use_bsm = false,
.led_compensation = 51,
.chain_noise_num_beacons = IWL_CAL_NUM_BEACONS,
+ .plcp_delta_threshold = IWL_MAX_PLCP_ERR_LONG_THRESHOLD_DEF,
};
struct iwl_cfg iwl5100_agn_cfg = {
@@ -1673,6 +1676,7 @@ struct iwl_cfg iwl5100_agn_cfg = {
.led_compensation = 51,
.use_rts_for_ht = true, /* use rts/cts protection */
.chain_noise_num_beacons = IWL_CAL_NUM_BEACONS,
+ .plcp_delta_threshold = IWL_MAX_PLCP_ERR_LONG_THRESHOLD_DEF,
};
struct iwl_cfg iwl5350_agn_cfg = {
@@ -1697,6 +1701,7 @@ struct iwl_cfg iwl5350_agn_cfg = {
.led_compensation = 51,
.use_rts_for_ht = true, /* use rts/cts protection */
.chain_noise_num_beacons = IWL_CAL_NUM_BEACONS,
+ .plcp_delta_threshold = IWL_MAX_PLCP_ERR_LONG_THRESHOLD_DEF,
};
struct iwl_cfg iwl5150_agn_cfg = {
@@ -1721,6 +1726,7 @@ struct iwl_cfg iwl5150_agn_cfg = {
.led_compensation = 51,
.use_rts_for_ht = true, /* use rts/cts protection */
.chain_noise_num_beacons = IWL_CAL_NUM_BEACONS,
+ .plcp_delta_threshold = IWL_MAX_PLCP_ERR_LONG_THRESHOLD_DEF,
};
struct iwl_cfg iwl5150_abg_cfg = {
@@ -1743,6 +1749,7 @@ struct iwl_cfg iwl5150_abg_cfg = {
.use_bsm = false,
.led_compensation = 51,
.chain_noise_num_beacons = IWL_CAL_NUM_BEACONS,
+ .plcp_delta_threshold = IWL_MAX_PLCP_ERR_LONG_THRESHOLD_DEF,
};
MODULE_FIRMWARE(IWL5000_MODULE_FIRMWARE(IWL5000_UCODE_API_MAX));
diff --git a/drivers/net/wireless/iwlwifi/iwl-6000.c b/drivers/net/wireless/iwlwifi/iwl-6000.c
index 4dab7f1..b191c63 100644
--- a/drivers/net/wireless/iwlwifi/iwl-6000.c
+++ b/drivers/net/wireless/iwlwifi/iwl-6000.c
@@ -308,6 +308,7 @@ struct iwl_cfg iwl6000i_2agn_cfg = {
.supports_idle = true,
.adv_thermal_throttle = true,
.support_ct_kill_exit = true,
+ .plcp_delta_threshold = IWL_MAX_PLCP_ERR_THRESHOLD_DEF,
};
struct iwl_cfg iwl6000i_2abg_cfg = {
@@ -337,6 +338,7 @@ struct iwl_cfg iwl6000i_2abg_cfg = {
.supports_idle = true,
.adv_thermal_throttle = true,
.support_ct_kill_exit = true,
+ .plcp_delta_threshold = IWL_MAX_PLCP_ERR_THRESHOLD_DEF,
};
struct iwl_cfg iwl6000i_2bg_cfg = {
@@ -366,6 +368,7 @@ struct iwl_cfg iwl6000i_2bg_cfg = {
.supports_idle = true,
.adv_thermal_throttle = true,
.support_ct_kill_exit = true,
+ .plcp_delta_threshold = IWL_MAX_PLCP_ERR_THRESHOLD_DEF,
};
struct iwl_cfg iwl6050_2agn_cfg = {
@@ -396,6 +399,7 @@ struct iwl_cfg iwl6050_2agn_cfg = {
.supports_idle = true,
.adv_thermal_throttle = true,
.support_ct_kill_exit = true,
+ .plcp_delta_threshold = IWL_MAX_PLCP_ERR_THRESHOLD_DEF,
};
struct iwl_cfg iwl6050_2abg_cfg = {
@@ -425,6 +429,7 @@ struct iwl_cfg iwl6050_2abg_cfg = {
.supports_idle = true,
.adv_thermal_throttle = true,
.support_ct_kill_exit = true,
+ .plcp_delta_threshold = IWL_MAX_PLCP_ERR_THRESHOLD_DEF,
};
struct iwl_cfg iwl6000_3agn_cfg = {
@@ -455,6 +460,7 @@ struct iwl_cfg iwl6000_3agn_cfg = {
.supports_idle = true,
.adv_thermal_throttle = true,
.support_ct_kill_exit = true,
+ .plcp_delta_threshold = IWL_MAX_PLCP_ERR_THRESHOLD_DEF,
};
MODULE_FIRMWARE(IWL6000_MODULE_FIRMWARE(IWL6000_UCODE_API_MAX));
diff --git a/drivers/net/wireless/iwlwifi/iwl-core.h b/drivers/net/wireless/iwlwifi/iwl-core.h
index 6de83d1..6619183 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.h
+++ b/drivers/net/wireless/iwlwifi/iwl-core.h
@@ -232,6 +232,8 @@ struct iwl_mod_params {
* @adv_thermal_throttle: support advance thermal throttle
* @support_ct_kill_exit: support ct kill exit condition
* @support_wimax_coexist: support wimax/wifi co-exist
+ * @plcp_delta_threshold: plcp error rate threshold used to trigger
+ * radio tuning when there is a high receiving plcp error rate
*
* We enable the driver to be backward compatible wrt API version. The
* driver specifies which APIs it supports (with @ucode_api_max being the
@@ -288,6 +290,7 @@ struct iwl_cfg {
bool adv_thermal_throttle;
bool support_ct_kill_exit;
const bool support_wimax_coexist;
+ u8 plcp_delta_threshold;
};
/***************************
diff --git a/drivers/net/wireless/iwlwifi/iwl-debug.h b/drivers/net/wireless/iwlwifi/iwl-debug.h
index d81b4f3..aff1dc0 100644
--- a/drivers/net/wireless/iwlwifi/iwl-debug.h
+++ b/drivers/net/wireless/iwlwifi/iwl-debug.h
@@ -114,6 +114,7 @@ struct iwl_debugfs {
struct dentry *file_fh_reg;
struct dentry *file_missed_beacon;
struct dentry *file_internal_scan;
+ struct dentry *file_plcp_delta;
} dbgfs_debug_files;
u32 sram_offset;
u32 sram_len;
diff --git a/drivers/net/wireless/iwlwifi/iwl-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
index 4944fdb..3f9c039 100644
--- a/drivers/net/wireless/iwlwifi/iwl-debugfs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
@@ -2195,6 +2195,47 @@ static ssize_t iwl_dbgfs_internal_scan_write(struct file *file,
return count;
}
+static ssize_t iwl_dbgfs_plcp_delta_read(struct file *file,
+ char __user *user_buf,
+ size_t count, loff_t *ppos) {
+
+ struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
+ int pos = 0;
+ char buf[12];
+ const size_t bufsz = sizeof(buf);
+ ssize_t ret;
+
+ pos += scnprintf(buf + pos, bufsz - pos, "%u\n",
+ priv->cfg->plcp_delta_threshold);
+
+ ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
+ return ret;
+}
+
+static ssize_t iwl_dbgfs_plcp_delta_write(struct file *file,
+ const char __user *user_buf,
+ size_t count, loff_t *ppos) {
+
+ struct iwl_priv *priv = file->private_data;
+ char buf[8];
+ int buf_size;
+ int plcp;
+
+ memset(buf, 0, sizeof(buf));
+ buf_size = min(count, sizeof(buf) - 1);
+ if (copy_from_user(buf, user_buf, buf_size))
+ return -EFAULT;
+ if (sscanf(buf, "%d", &plcp) != 1)
+ return -EINVAL;
+ if ((plcp <= IWL_MAX_PLCP_ERR_THRESHOLD_MIN) ||
+ (plcp > IWL_MAX_PLCP_ERR_THRESHOLD_MAX))
+ priv->cfg->plcp_delta_threshold =
+ IWL_MAX_PLCP_ERR_THRESHOLD_DEF;
+ else
+ priv->cfg->plcp_delta_threshold = plcp;
+ return count;
+}
+
DEBUGFS_READ_FILE_OPS(rx_statistics);
DEBUGFS_READ_FILE_OPS(tx_statistics);
DEBUGFS_READ_WRITE_FILE_OPS(traffic_log);
@@ -2214,6 +2255,7 @@ DEBUGFS_READ_WRITE_FILE_OPS(ucode_tracing);
DEBUGFS_READ_FILE_OPS(fh_reg);
DEBUGFS_READ_WRITE_FILE_OPS(missed_beacon);
DEBUGFS_WRITE_FILE_OPS(internal_scan);
+DEBUGFS_READ_WRITE_FILE_OPS(plcp_delta);
/*
* Create the debugfs files and directories
@@ -2268,6 +2310,7 @@ int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
DEBUGFS_ADD_FILE(fh_reg, debug, S_IRUSR);
DEBUGFS_ADD_FILE(missed_beacon, debug, S_IWUSR);
DEBUGFS_ADD_FILE(internal_scan, debug, S_IWUSR);
+ DEBUGFS_ADD_FILE(plcp_delta, debug, S_IWUSR | S_IRUSR);
if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) != CSR_HW_REV_TYPE_3945) {
DEBUGFS_ADD_FILE(ucode_rx_stats, debug, S_IRUSR);
DEBUGFS_ADD_FILE(ucode_tx_stats, debug, S_IRUSR);
@@ -2330,6 +2373,7 @@ void iwl_dbgfs_unregister(struct iwl_priv *priv)
DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_fh_reg);
DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_missed_beacon);
DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_internal_scan);
+ DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_plcp_delta);
if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) != CSR_HW_REV_TYPE_3945) {
DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.
file_ucode_rx_stats);
diff --git a/drivers/net/wireless/iwlwifi/iwl-dev.h b/drivers/net/wireless/iwlwifi/iwl-dev.h
index 86d38ae..a1f3ecb 100644
--- a/drivers/net/wireless/iwlwifi/iwl-dev.h
+++ b/drivers/net/wireless/iwlwifi/iwl-dev.h
@@ -1026,6 +1026,15 @@ struct iwl_event_log {
#define IWL_HOST_INT_CALIB_TIMEOUT_DEF (0x10)
#define IWL_HOST_INT_CALIB_TIMEOUT_MIN (0x0)
+/*
+ * This is the threshold value of plcp error rate per 100mSecs. It is
+ * used to set and check for the validity of plcp_delta.
+ */
+#define IWL_MAX_PLCP_ERR_THRESHOLD_MIN (0)
+#define IWL_MAX_PLCP_ERR_THRESHOLD_DEF (50)
+#define IWL_MAX_PLCP_ERR_LONG_THRESHOLD_DEF (100)
+#define IWL_MAX_PLCP_ERR_THRESHOLD_MAX (255)
+
struct iwl_priv {
/* ieee device used by generic ieee processing code */
@@ -1055,6 +1064,9 @@ struct iwl_priv {
u32 ucode_beacon_time;
int missed_beacon_threshold;
+ /* storing the jiffies when the plcp error rate is received */
+ unsigned long plcp_jiffies;
+
/* we allocate array of iwl4965_channel_info for NIC's valid channels.
* Access via channel # using indirect index array */
struct iwl_channel_info *channel_info; /* channel info array */
diff --git a/drivers/net/wireless/iwlwifi/iwl-rx.c b/drivers/net/wireless/iwlwifi/iwl-rx.c
index dc06c7b..ea309f4 100644
--- a/drivers/net/wireless/iwlwifi/iwl-rx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-rx.c
@@ -602,11 +602,15 @@ static void iwl_accumulative_statistics(struct iwl_priv *priv,
#define REG_RECALIB_PERIOD (60)
+#define PLCP_MSG "plcp_err exceeded %u, %u, %u, %u, %u, %d, %u mSecs\n"
void iwl_rx_statistics(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
int change;
struct iwl_rx_packet *pkt = rxb_addr(rxb);
+ int combined_plcp_delta;
+ unsigned int plcp_msec;
+ unsigned long plcp_received_jiffies;
IWL_DEBUG_RX(priv, "Statistics notification received (%d vs %d).\n",
(int)sizeof(priv->statistics),
@@ -621,6 +625,56 @@ void iwl_rx_statistics(struct iwl_priv *priv,
#ifdef CONFIG_IWLWIFI_DEBUG
iwl_accumulative_statistics(priv, (__le32 *)&pkt->u.stats);
#endif
+ /*
+ * check for plcp_err and trigger radio reset if it exceeds
+ * the plcp error threshold plcp_delta.
+ */
+ plcp_received_jiffies = jiffies;
+ plcp_msec = jiffies_to_msecs((long) plcp_received_jiffies -
+ (long) priv->plcp_jiffies);
+ priv->plcp_jiffies = plcp_received_jiffies;
+ /*
+ * check to make sure plcp_msec is not 0 to prevent division
+ * by zero.
+ */
+ if (plcp_msec) {
+ combined_plcp_delta =
+ (le32_to_cpu(pkt->u.stats.rx.ofdm.plcp_err) -
+ le32_to_cpu(priv->statistics.rx.ofdm.plcp_err)) +
+ (le32_to_cpu(pkt->u.stats.rx.ofdm_ht.plcp_err) -
+ le32_to_cpu(priv->statistics.rx.ofdm_ht.plcp_err));
+
+ if ((combined_plcp_delta > 0) &&
+ ((combined_plcp_delta * 100) / plcp_msec) >
+ priv->cfg->plcp_delta_threshold) {
+ /*
+ * if plcp_err exceed the threshold, the following
+ * data is printed in csv format:
+ * Text: plcp_err exceeded %d,
+ * Received ofdm.plcp_err,
+ * Current ofdm.plcp_err,
+ * Received ofdm_ht.plcp_err,
+ * Current ofdm_ht.plcp_err,
+ * combined_plcp_delta,
+ * plcp_msec
+ */
+ IWL_DEBUG_RADIO(priv, PLCP_MSG,
+ priv->cfg->plcp_delta_threshold,
+ le32_to_cpu(pkt->u.stats.rx.ofdm.plcp_err),
+ le32_to_cpu(priv->statistics.rx.ofdm.plcp_err),
+ le32_to_cpu(pkt->u.stats.rx.ofdm_ht.plcp_err),
+ le32_to_cpu(
+ priv->statistics.rx.ofdm_ht.plcp_err),
+ combined_plcp_delta, plcp_msec);
+
+ /*
+ * Reset the RF radio due to the high plcp
+ * error rate
+ */
+ iwl_force_rf_reset(priv);
+ }
+ }
+
memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics));
set_bit(STATUS_STATISTICS, &priv->status);
generated by cgit v1.1 at 2024-11-04 02:25:53 +0000