Merge branch 'wireless-next-2.6' of git://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/iwlwifi-2.6

drivers/net/wireless/iwlwifi/iwl-1000.c

@@ -129,8 +129,8 @@ static int iwl1000_hw_set_hw_params(struct iwl_priv *priv)
 			priv->cfg->num_of_queues *
 			sizeof(struct iwlagn_scd_bc_tbl);
 	priv->hw_params.tfd_size = sizeof(struct iwl_tfd);
-	priv->hw_params.max_stations = IWL5000_STATION_COUNT;
-	priv->hw_params.bcast_sta_id = IWL5000_BROADCAST_ID;
+	priv->hw_params.max_stations = IWLAGN_STATION_COUNT;
+	priv->hw_params.bcast_sta_id = IWLAGN_BROADCAST_ID;
 
 	priv->hw_params.max_data_size = IWLAGN_RTC_DATA_SIZE;
 	priv->hw_params.max_inst_size = IWLAGN_RTC_INST_SIZE;
@@ -226,6 +226,8 @@ static struct iwl_lib_ops iwl1000_lib = {
 	.recover_from_tx_stall = iwl_bg_monitor_recover,
 	.check_plcp_health = iwl_good_plcp_health,
 	.check_ack_health = iwl_good_ack_health,
+	.txfifo_flush = iwlagn_txfifo_flush,
+	.dev_txfifo_flush = iwlagn_dev_txfifo_flush,
 };
 
 static const struct iwl_ops iwl1000_ops = {

drivers/net/wireless/iwlwifi/iwl-5000.c

@@ -179,8 +179,8 @@ static int iwl5000_hw_set_hw_params(struct iwl_priv *priv)
 			priv->cfg->num_of_queues *
 			sizeof(struct iwlagn_scd_bc_tbl);
 	priv->hw_params.tfd_size = sizeof(struct iwl_tfd);
-	priv->hw_params.max_stations = IWL5000_STATION_COUNT;
-	priv->hw_params.bcast_sta_id = IWL5000_BROADCAST_ID;
+	priv->hw_params.max_stations = IWLAGN_STATION_COUNT;
+	priv->hw_params.bcast_sta_id = IWLAGN_BROADCAST_ID;
 
 	priv->hw_params.max_data_size = IWLAGN_RTC_DATA_SIZE;
 	priv->hw_params.max_inst_size = IWLAGN_RTC_INST_SIZE;
@@ -226,8 +226,8 @@ static int iwl5150_hw_set_hw_params(struct iwl_priv *priv)
 			priv->cfg->num_of_queues *
 			sizeof(struct iwlagn_scd_bc_tbl);
 	priv->hw_params.tfd_size = sizeof(struct iwl_tfd);
-	priv->hw_params.max_stations = IWL5000_STATION_COUNT;
-	priv->hw_params.bcast_sta_id = IWL5000_BROADCAST_ID;
+	priv->hw_params.max_stations = IWLAGN_STATION_COUNT;
+	priv->hw_params.bcast_sta_id = IWLAGN_BROADCAST_ID;
 
 	priv->hw_params.max_data_size = IWLAGN_RTC_DATA_SIZE;
 	priv->hw_params.max_inst_size = IWLAGN_RTC_INST_SIZE;
@@ -402,6 +402,8 @@ static struct iwl_lib_ops iwl5000_lib = {
 	.recover_from_tx_stall = iwl_bg_monitor_recover,
 	.check_plcp_health = iwl_good_plcp_health,
 	.check_ack_health = iwl_good_ack_health,
+	.txfifo_flush = iwlagn_txfifo_flush,
+	.dev_txfifo_flush = iwlagn_dev_txfifo_flush,
 };
 
 static struct iwl_lib_ops iwl5150_lib = {
@@ -465,6 +467,8 @@ static struct iwl_lib_ops iwl5150_lib = {
 	.recover_from_tx_stall = iwl_bg_monitor_recover,
 	.check_plcp_health = iwl_good_plcp_health,
 	.check_ack_health = iwl_good_ack_health,
+	.txfifo_flush = iwlagn_txfifo_flush,
+	.dev_txfifo_flush = iwlagn_dev_txfifo_flush,
 };
 
 static const struct iwl_ops iwl5000_ops = {

drivers/net/wireless/iwlwifi/iwl-6000.c

@@ -160,8 +160,8 @@ static int iwl6000_hw_set_hw_params(struct iwl_priv *priv)
 			priv->cfg->num_of_queues *
 			sizeof(struct iwlagn_scd_bc_tbl);
 	priv->hw_params.tfd_size = sizeof(struct iwl_tfd);
-	priv->hw_params.max_stations = IWL5000_STATION_COUNT;
-	priv->hw_params.bcast_sta_id = IWL5000_BROADCAST_ID;
+	priv->hw_params.max_stations = IWLAGN_STATION_COUNT;
+	priv->hw_params.bcast_sta_id = IWLAGN_BROADCAST_ID;
 
 	priv->hw_params.max_data_size = IWL60_RTC_DATA_SIZE;
 	priv->hw_params.max_inst_size = IWL60_RTC_INST_SIZE;
@@ -327,6 +327,8 @@ static struct iwl_lib_ops iwl6000_lib = {
 	.recover_from_tx_stall = iwl_bg_monitor_recover,
 	.check_plcp_health = iwl_good_plcp_health,
 	.check_ack_health = iwl_good_ack_health,
+	.txfifo_flush = iwlagn_txfifo_flush,
+	.dev_txfifo_flush = iwlagn_dev_txfifo_flush,
 };
 
 static const struct iwl_ops iwl6000_ops = {

drivers/net/wireless/iwlwifi/iwl-agn-calib.c

@@ -409,46 +409,34 @@ static int iwl_sens_auto_corr_ofdm(struct iwl_priv *priv,
 	return 0;
 }
 
-/* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */
-static int iwl_sensitivity_write(struct iwl_priv *priv)
+static void iwl_prepare_legacy_sensitivity_tbl(struct iwl_priv *priv,
+				struct iwl_sensitivity_data *data,
+				__le16 *tbl)
 {
-	struct iwl_sensitivity_cmd cmd ;
-	struct iwl_sensitivity_data *data = NULL;
-	struct iwl_host_cmd cmd_out = {
-		.id = SENSITIVITY_CMD,
-		.len = sizeof(struct iwl_sensitivity_cmd),
-		.flags = CMD_ASYNC,
-		.data = &cmd,
-	};
-
-	data = &(priv->sensitivity_data);
-
-	memset(&cmd, 0, sizeof(cmd));
-
-	cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX] =
+	tbl[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX] =
 				cpu_to_le16((u16)data->auto_corr_ofdm);
-	cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX] =
+	tbl[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX] =
 				cpu_to_le16((u16)data->auto_corr_ofdm_mrc);
-	cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX] =
+	tbl[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX] =
 				cpu_to_le16((u16)data->auto_corr_ofdm_x1);
-	cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX] =
+	tbl[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX] =
 				cpu_to_le16((u16)data->auto_corr_ofdm_mrc_x1);
 
-	cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX] =
+	tbl[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX] =
 				cpu_to_le16((u16)data->auto_corr_cck);
-	cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX] =
+	tbl[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX] =
 				cpu_to_le16((u16)data->auto_corr_cck_mrc);
 
-	cmd.table[HD_MIN_ENERGY_CCK_DET_INDEX] =
+	tbl[HD_MIN_ENERGY_CCK_DET_INDEX] =
 				cpu_to_le16((u16)data->nrg_th_cck);
-	cmd.table[HD_MIN_ENERGY_OFDM_DET_INDEX] =
+	tbl[HD_MIN_ENERGY_OFDM_DET_INDEX] =
 				cpu_to_le16((u16)data->nrg_th_ofdm);
 
-	cmd.table[HD_BARKER_CORR_TH_ADD_MIN_INDEX] =
+	tbl[HD_BARKER_CORR_TH_ADD_MIN_INDEX] =
 				cpu_to_le16(data->barker_corr_th_min);
-	cmd.table[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX] =
+	tbl[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX] =
 				cpu_to_le16(data->barker_corr_th_min_mrc);
-	cmd.table[HD_OFDM_ENERGY_TH_IN_INDEX] =
+	tbl[HD_OFDM_ENERGY_TH_IN_INDEX] =
 				cpu_to_le16(data->nrg_th_cca);
 
 	IWL_DEBUG_CALIB(priv, "ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n",
@@ -459,6 +447,25 @@ static int iwl_sensitivity_write(struct iwl_priv *priv)
 	IWL_DEBUG_CALIB(priv, "cck: ac %u mrc %u thresh %u\n",
 			data->auto_corr_cck, data->auto_corr_cck_mrc,
 			data->nrg_th_cck);
+}
+
+/* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */
+static int iwl_sensitivity_write(struct iwl_priv *priv)
+{
+	struct iwl_sensitivity_cmd cmd;
+	struct iwl_sensitivity_data *data = NULL;
+	struct iwl_host_cmd cmd_out = {
+		.id = SENSITIVITY_CMD,
+		.len = sizeof(struct iwl_sensitivity_cmd),
+		.flags = CMD_ASYNC,
+		.data = &cmd,
+	};
+
+	data = &(priv->sensitivity_data);
+
+	memset(&cmd, 0, sizeof(cmd));
+
+	iwl_prepare_legacy_sensitivity_tbl(priv, data, &cmd.table[0]);
 
 	/* Update uCode's "work" table, and copy it to DSP */
 	cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE;
@@ -477,6 +484,70 @@ static int iwl_sensitivity_write(struct iwl_priv *priv)
 	return iwl_send_cmd(priv, &cmd_out);
 }
 
+/* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */
+static int iwl_enhance_sensitivity_write(struct iwl_priv *priv)
+{
+	struct iwl_enhance_sensitivity_cmd cmd;
+	struct iwl_sensitivity_data *data = NULL;
+	struct iwl_host_cmd cmd_out = {
+		.id = SENSITIVITY_CMD,
+		.len = sizeof(struct iwl_enhance_sensitivity_cmd),
+		.flags = CMD_ASYNC,
+		.data = &cmd,
+	};
+
+	data = &(priv->sensitivity_data);
+
+	memset(&cmd, 0, sizeof(cmd));
+
+	iwl_prepare_legacy_sensitivity_tbl(priv, data, &cmd.enhance_table[0]);
+
+	cmd.enhance_table[HD_INA_NON_SQUARE_DET_OFDM_INDEX] =
+		HD_INA_NON_SQUARE_DET_OFDM_DATA;
+	cmd.enhance_table[HD_INA_NON_SQUARE_DET_CCK_INDEX] =
+		HD_INA_NON_SQUARE_DET_CCK_DATA;
+	cmd.enhance_table[HD_CORR_11_INSTEAD_OF_CORR_9_EN_INDEX] =
+		HD_CORR_11_INSTEAD_OF_CORR_9_EN_DATA;
+	cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_SLOPE_MRC_INDEX] =
+		HD_OFDM_NON_SQUARE_DET_SLOPE_MRC_DATA;
+	cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_INTERCEPT_MRC_INDEX] =
+		HD_OFDM_NON_SQUARE_DET_INTERCEPT_MRC_DATA;
+	cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_SLOPE_INDEX] =
+		HD_OFDM_NON_SQUARE_DET_SLOPE_DATA;
+	cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_INTERCEPT_INDEX] =
+		HD_OFDM_NON_SQUARE_DET_INTERCEPT_DATA;
+	cmd.enhance_table[HD_CCK_NON_SQUARE_DET_SLOPE_MRC_INDEX] =
+		HD_CCK_NON_SQUARE_DET_SLOPE_MRC_DATA;
+	cmd.enhance_table[HD_CCK_NON_SQUARE_DET_INTERCEPT_MRC_INDEX] =
+		HD_CCK_NON_SQUARE_DET_INTERCEPT_MRC_DATA;
+	cmd.enhance_table[HD_CCK_NON_SQUARE_DET_SLOPE_INDEX] =
+		HD_CCK_NON_SQUARE_DET_SLOPE_DATA;
+	cmd.enhance_table[HD_CCK_NON_SQUARE_DET_INTERCEPT_INDEX] =
+		HD_CCK_NON_SQUARE_DET_INTERCEPT_DATA;
+
+	/* Update uCode's "work" table, and copy it to DSP */
+	cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE;
+
+	/* Don't send command to uCode if nothing has changed */
+	if (!memcmp(&cmd.enhance_table[0], &(priv->sensitivity_tbl[0]),
+		    sizeof(u16)*HD_TABLE_SIZE) &&
+	    !memcmp(&cmd.enhance_table[HD_INA_NON_SQUARE_DET_OFDM_INDEX],
+		    &(priv->enhance_sensitivity_tbl[0]),
+		    sizeof(u16)*ENHANCE_HD_TABLE_ENTRIES)) {
+		IWL_DEBUG_CALIB(priv, "No change in SENSITIVITY_CMD\n");
+		return 0;
+	}
+
+	/* Copy table for comparison next time */
+	memcpy(&(priv->sensitivity_tbl[0]), &(cmd.enhance_table[0]),
+	       sizeof(u16)*HD_TABLE_SIZE);
+	memcpy(&(priv->enhance_sensitivity_tbl[0]),
+	       &(cmd.enhance_table[HD_INA_NON_SQUARE_DET_OFDM_INDEX]),
+	       sizeof(u16)*ENHANCE_HD_TABLE_ENTRIES);
+
+	return iwl_send_cmd(priv, &cmd_out);
+}
+
 void iwl_init_sensitivity(struct iwl_priv *priv)
 {
 	int ret = 0;
@@ -527,7 +598,10 @@ void iwl_init_sensitivity(struct iwl_priv *priv)
 	data->last_bad_plcp_cnt_cck = 0;
 	data->last_fa_cnt_cck = 0;
 
-	ret |= iwl_sensitivity_write(priv);
+	if (priv->enhance_sensitivity_table)
+		ret |= iwl_enhance_sensitivity_write(priv);
+	else
+		ret |= iwl_sensitivity_write(priv);
 	IWL_DEBUG_CALIB(priv, "<<return 0x%X\n", ret);
 }
 
@@ -633,7 +707,10 @@ void iwl_sensitivity_calibration(struct iwl_priv *priv,
 
 	iwl_sens_auto_corr_ofdm(priv, norm_fa_ofdm, rx_enable_time);
 	iwl_sens_energy_cck(priv, norm_fa_cck, rx_enable_time, &statis);
-	iwl_sensitivity_write(priv);
+	if (priv->enhance_sensitivity_table)
+		iwl_enhance_sensitivity_write(priv);
+	else
+		iwl_sensitivity_write(priv);
 }
 
 static inline u8 find_first_chain(u8 mask)

drivers/net/wireless/iwlwifi/iwl-agn-lib.c

@@ -205,7 +205,9 @@ void iwl_check_abort_status(struct iwl_priv *priv,
 			    u8 frame_count, u32 status)
 {
 	if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
-		IWL_ERR(priv, "TODO: Implement Tx flush command!!!\n");
+		IWL_ERR(priv, "Tx flush command to flush out all frames\n");
+		if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
+			queue_work(priv->workqueue, &priv->tx_flush);
 	}
 }
 
@@ -1435,3 +1437,81 @@ void iwl_free_tfds_in_queue(struct iwl_priv *priv,
 		priv->stations[sta_id].tid[tid].tfds_in_queue = 0;
 	}
 }
+
+#define IWL_FLUSH_WAIT_MS	2000
+
+int iwlagn_wait_tx_queue_empty(struct iwl_priv *priv)
+{
+	struct iwl_tx_queue *txq;
+	struct iwl_queue *q;
+	int cnt;
+	unsigned long now = jiffies;
+	int ret = 0;
+
+	/* waiting for all the tx frames complete might take a while */
+	for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
+		if (cnt == IWL_CMD_QUEUE_NUM)
+			continue;
+		txq = &priv->txq[cnt];
+		q = &txq->q;
+		while (q->read_ptr != q->write_ptr && !time_after(jiffies,
+		       now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS)))
+				msleep(1);
+
+		if (q->read_ptr != q->write_ptr) {
+			IWL_ERR(priv, "fail to flush all tx fifo queues\n");
+			ret = -ETIMEDOUT;
+			break;
+		}
+	}
+	return ret;
+}
+
+#define IWL_TX_QUEUE_MSK	0xfffff
+
+/**
+ * iwlagn_txfifo_flush: send REPLY_TXFIFO_FLUSH command to uCode
+ *
+ * pre-requirements:
+ *  1. acquire mutex before calling
+ *  2. make sure rf is on and not in exit state
+ */
+int iwlagn_txfifo_flush(struct iwl_priv *priv, u16 flush_control)
+{
+	struct iwl_txfifo_flush_cmd flush_cmd;
+	struct iwl_host_cmd cmd = {
+		.id = REPLY_TXFIFO_FLUSH,
+		.len = sizeof(struct iwl_txfifo_flush_cmd),
+		.flags = CMD_SYNC,
+		.data = &flush_cmd,
+	};
+
+	might_sleep();
+
+	memset(&flush_cmd, 0, sizeof(flush_cmd));
+	flush_cmd.fifo_control = IWL_TX_FIFO_VO_MSK | IWL_TX_FIFO_VI_MSK |
+				 IWL_TX_FIFO_BE_MSK | IWL_TX_FIFO_BK_MSK;
+	if (priv->cfg->sku & IWL_SKU_N)
+		flush_cmd.fifo_control |= IWL_AGG_TX_QUEUE_MSK;
+
+	IWL_DEBUG_INFO(priv, "fifo queue control: 0X%x\n",
+		       flush_cmd.fifo_control);
+	flush_cmd.flush_control = cpu_to_le16(flush_control);
+
+	return iwl_send_cmd(priv, &cmd);
+}
+
+void iwlagn_dev_txfifo_flush(struct iwl_priv *priv, u16 flush_control)
+{
+	mutex_lock(&priv->mutex);
+	ieee80211_stop_queues(priv->hw);
+	if (priv->cfg->ops->lib->txfifo_flush(priv, IWL_DROP_ALL)) {
+		IWL_ERR(priv, "flush request fail\n");
+		goto done;
+	}
+	IWL_DEBUG_INFO(priv, "wait transmit/flush all frames\n");
+	iwlagn_wait_tx_queue_empty(priv);
+done:
+	ieee80211_wake_queues(priv->hw);
+	mutex_unlock(&priv->mutex);
+}

drivers/net/wireless/iwlwifi/iwl-agn.c

@@ -859,6 +859,24 @@ int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
 	return 0;
 }
 
+static void iwl_bg_tx_flush(struct work_struct *work)
+{
+	struct iwl_priv *priv =
+		container_of(work, struct iwl_priv, tx_flush);
+
+	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
+		return;
+
+	/* do nothing if rf-kill is on */
+	if (!iwl_is_ready_rf(priv))
+		return;
+
+	if (priv->cfg->ops->lib->txfifo_flush) {
+		IWL_DEBUG_INFO(priv, "device request: flush all tx frames\n");
+		iwlagn_dev_txfifo_flush(priv, IWL_DROP_ALL);
+	}
+}
+
 /**
  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
  *
@@ -1806,12 +1824,21 @@ static int iwlagn_load_firmware(struct iwl_priv *priv,
 	const u8 *data;
 	int wanted_alternative = iwlagn_wanted_ucode_alternative, tmp;
 	u64 alternatives;
+	u32 tlv_len;
+	enum iwl_ucode_tlv_type tlv_type;
+	const u8 *tlv_data;
+	int ret = 0;
 
-	if (len < sizeof(*ucode))
+	if (len < sizeof(*ucode)) {
+		IWL_ERR(priv, "uCode has invalid length: %zd\n", len);
 		return -EINVAL;
+	}
 
-	if (ucode->magic != cpu_to_le32(IWL_TLV_UCODE_MAGIC))
+	if (ucode->magic != cpu_to_le32(IWL_TLV_UCODE_MAGIC)) {
+		IWL_ERR(priv, "invalid uCode magic: 0X%x\n",
+			le32_to_cpu(ucode->magic));
 		return -EINVAL;
+	}
 
 	/*
 	 * Check which alternatives are present, and "downgrade"
@@ -1836,11 +1863,9 @@ static int iwlagn_load_firmware(struct iwl_priv *priv,
 
 	len -= sizeof(*ucode);
 
-	while (len >= sizeof(*tlv)) {
-		u32 tlv_len;
-		enum iwl_ucode_tlv_type tlv_type;
+	while (len >= sizeof(*tlv) && !ret) {
 		u16 tlv_alt;
-		const u8 *tlv_data;
+		u32 fixed_tlv_size = 4;
 
 		len -= sizeof(*tlv);
 		tlv = (void *)data;
@@ -1850,8 +1875,11 @@ static int iwlagn_load_firmware(struct iwl_priv *priv,
 		tlv_alt = le16_to_cpu(tlv->alternative);
 		tlv_data = tlv->data;
 
-		if (len < tlv_len)
+		if (len < tlv_len) {
+			IWL_ERR(priv, "invalid TLV len: %zd/%u\n",
+				len, tlv_len);
 			return -EINVAL;
+		}
 		len -= ALIGN(tlv_len, 4);
 		data += sizeof(*tlv) + ALIGN(tlv_len, 4);
 
@@ -1885,56 +1913,77 @@ static int iwlagn_load_firmware(struct iwl_priv *priv,
 			pieces->boot_size = tlv_len;
 			break;
 		case IWL_UCODE_TLV_PROBE_MAX_LEN:
-			if (tlv_len != 4)
-				return -EINVAL;
-			capa->max_probe_length =
-				le32_to_cpup((__le32 *)tlv_data);
+			if (tlv_len != fixed_tlv_size)
+				ret = -EINVAL;
+			else
+				capa->max_probe_length =
+					le32_to_cpup((__le32 *)tlv_data);
 			break;
 		case IWL_UCODE_TLV_INIT_EVTLOG_PTR:
-			if (tlv_len != 4)
-				return -EINVAL;
-			pieces->init_evtlog_ptr =
-				le32_to_cpup((__le32 *)tlv_data);
+			if (tlv_len != fixed_tlv_size)
+				ret = -EINVAL;
+			else
+				pieces->init_evtlog_ptr =
+					le32_to_cpup((__le32 *)tlv_data);
 			break;
 		case IWL_UCODE_TLV_INIT_EVTLOG_SIZE:
-			if (tlv_len != 4)
-				return -EINVAL;
-			pieces->init_evtlog_size =
-				le32_to_cpup((__le32 *)tlv_data);
+			if (tlv_len != fixed_tlv_size)
+				ret = -EINVAL;
+			else
+				pieces->init_evtlog_size =
+					le32_to_cpup((__le32 *)tlv_data);
 			break;
 		case IWL_UCODE_TLV_INIT_ERRLOG_PTR:
-			if (tlv_len != 4)
-				return -EINVAL;
-			pieces->init_errlog_ptr =
-				le32_to_cpup((__le32 *)tlv_data);
+			if (tlv_len != fixed_tlv_size)
+				ret = -EINVAL;
+			else
+				pieces->init_errlog_ptr =
+					le32_to_cpup((__le32 *)tlv_data);
 			break;
 		case IWL_UCODE_TLV_RUNT_EVTLOG_PTR:
-			if (tlv_len != 4)
-				return -EINVAL;
-			pieces->inst_evtlog_ptr =
-				le32_to_cpup((__le32 *)tlv_data);
+			if (tlv_len != fixed_tlv_size)
+				ret = -EINVAL;
+			else
+				pieces->inst_evtlog_ptr =
+					le32_to_cpup((__le32 *)tlv_data);
 			break;
 		case IWL_UCODE_TLV_RUNT_EVTLOG_SIZE:
-			if (tlv_len != 4)
-				return -EINVAL;
-			pieces->inst_evtlog_size =
-				le32_to_cpup((__le32 *)tlv_data);
+			if (tlv_len != fixed_tlv_size)
+				ret = -EINVAL;
+			else
+				pieces->inst_evtlog_size =
+					le32_to_cpup((__le32 *)tlv_data);
 			break;
 		case IWL_UCODE_TLV_RUNT_ERRLOG_PTR:
-			if (tlv_len != 4)
-				return -EINVAL;
-			pieces->inst_errlog_ptr =
-				le32_to_cpup((__le32 *)tlv_data);
+			if (tlv_len != fixed_tlv_size)
+				ret = -EINVAL;
+			else
+				pieces->inst_errlog_ptr =
+					le32_to_cpup((__le32 *)tlv_data);
+			break;
+		case IWL_UCODE_TLV_ENHANCE_SENS_TBL:
+			if (tlv_len)
+				ret = -EINVAL;
+			else
+				priv->enhance_sensitivity_table = true;
 			break;
 		default:
+			IWL_WARN(priv, "unknown TLV: %d\n", tlv_type);
 			break;
 		}
 	}
 
-	if (len)
-		return -EINVAL;
+	if (len) {
+		IWL_ERR(priv, "invalid TLV after parsing: %zd\n", len);
+		iwl_print_hex_dump(priv, IWL_DL_FW, (u8 *)data, len);
+		ret = -EINVAL;
+	} else if (ret) {
+		IWL_ERR(priv, "TLV %d has invalid size: %u\n",
+			tlv_type, tlv_len);
+		iwl_print_hex_dump(priv, IWL_DL_FW, (u8 *)tlv_data, tlv_len);
+	}
 
-	return 0;
+	return ret;
 }
 
 /**
@@ -3614,6 +3663,44 @@ out_exit:
 	IWL_DEBUG_MAC80211(priv, "leave\n");
 }
 
+static void iwl_mac_flush(struct ieee80211_hw *hw, bool drop)
+{
+	struct iwl_priv *priv = hw->priv;
+
+	mutex_lock(&priv->mutex);
+	IWL_DEBUG_MAC80211(priv, "enter\n");
+
+	/* do not support "flush" */
+	if (!priv->cfg->ops->lib->txfifo_flush)
+		goto done;
+
+	if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
+		IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
+		goto done;
+	}
+	if (iwl_is_rfkill(priv)) {
+		IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
+		goto done;
+	}
+
+	/*
+	 * mac80211 will not push any more frames for transmit
+	 * until the flush is completed
+	 */
+	if (drop) {
+		IWL_DEBUG_MAC80211(priv, "send flush command\n");
+		if (priv->cfg->ops->lib->txfifo_flush(priv, IWL_DROP_ALL)) {
+			IWL_ERR(priv, "flush request fail\n");
+			goto done;
+		}
+	}
+	IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
+	iwlagn_wait_tx_queue_empty(priv);
+done:
+	mutex_unlock(&priv->mutex);
+	IWL_DEBUG_MAC80211(priv, "leave\n");
+}
+
 /*****************************************************************************
  *
  * driver setup and teardown
@@ -3630,6 +3717,7 @@ static void iwl_setup_deferred_work(struct iwl_priv *priv)
 	INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
 	INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
 	INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
+	INIT_WORK(&priv->tx_flush, iwl_bg_tx_flush);
 	INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
 	INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
 
@@ -3787,6 +3875,7 @@ static struct ieee80211_ops iwl_hw_ops = {
 	.sta_add = iwlagn_mac_sta_add,
 	.sta_remove = iwl_mac_sta_remove,
 	.channel_switch = iwl_mac_channel_switch,
+	.flush = iwl_mac_flush,
 };
 
 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)

drivers/net/wireless/iwlwifi/iwl-agn.h

@@ -147,6 +147,9 @@ const u8 *iwlagn_eeprom_query_addr(const struct iwl_priv *priv,
 void iwlagn_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq);
 int iwlagn_rx_init(struct iwl_priv *priv, struct iwl_rx_queue *rxq);
 int iwlagn_hw_nic_init(struct iwl_priv *priv);
+int iwlagn_wait_tx_queue_empty(struct iwl_priv *priv);
+int iwlagn_txfifo_flush(struct iwl_priv *priv, u16 flush_control);
+void iwlagn_dev_txfifo_flush(struct iwl_priv *priv, u16 flush_control);
 
 /* rx */
 void iwlagn_rx_queue_restock(struct iwl_priv *priv);

drivers/net/wireless/iwlwifi/iwl-commands.h

@@ -97,6 +97,7 @@ enum {
 	REPLY_ADD_STA = 0x18,
 	REPLY_REMOVE_STA = 0x19,
 	REPLY_REMOVE_ALL_STA = 0x1a,	/* not used */
+	REPLY_TXFIFO_FLUSH = 0x1e,
 
 	/* Security */
 	REPLY_WEPKEY = 0x20,
@@ -957,8 +958,8 @@ struct iwl_qosparam_cmd {
 #define IWL3945_STATION_COUNT	25
 #define IWL4965_BROADCAST_ID	31
 #define	IWL4965_STATION_COUNT	32
-#define IWL5000_BROADCAST_ID	15
-#define	IWL5000_STATION_COUNT	16
+#define IWLAGN_BROADCAST_ID	15
+#define	IWLAGN_STATION_COUNT	16
 
 #define	IWL_STATION_COUNT	32 	/* MAX(3945,4965)*/
 #define	IWL_INVALID_STATION 	255
@@ -1209,6 +1210,43 @@ struct iwl_rem_sta_cmd {
 	u8 reserved2[2];
 } __attribute__ ((packed));
 
+#define IWL_TX_FIFO_BK_MSK		cpu_to_le32(BIT(0))
+#define IWL_TX_FIFO_BE_MSK		cpu_to_le32(BIT(1))
+#define IWL_TX_FIFO_VI_MSK		cpu_to_le32(BIT(2))
+#define IWL_TX_FIFO_VO_MSK		cpu_to_le32(BIT(3))
+#define IWL_AGG_TX_QUEUE_MSK		cpu_to_le32(0xffc00)
+
+#define IWL_DROP_SINGLE		0
+#define IWL_DROP_SELECTED	1
+#define IWL_DROP_ALL		2
+
+/*
+ * REPLY_TXFIFO_FLUSH = 0x1e(command and response)
+ *
+ * When using full FIFO flush this command checks the scheduler HW block WR/RD
+ * pointers to check if all the frames were transferred by DMA into the
+ * relevant TX FIFO queue. Only when the DMA is finished and the queue is
+ * empty the command can finish.
+ * This command is used to flush the TXFIFO from transmit commands, it may
+ * operate on single or multiple queues, the command queue can't be flushed by
+ * this command. The command response is returned when all the queue flush
+ * operations are done. Each TX command flushed return response with the FLUSH
+ * status set in the TX response status. When FIFO flush operation is used,
+ * the flush operation ends when both the scheduler DMA done and TXFIFO empty
+ * are set.
+ *
+ * @fifo_control: bit mask for which queues to flush
+ * @flush_control: flush controls
+ *	0: Dump single MSDU
+ *	1: Dump multiple MSDU according to PS, INVALID STA, TTL, TID disable.
+ *	2: Dump all FIFO
+ */
+struct iwl_txfifo_flush_cmd {
+	__le32 fifo_control;
+	__le16 flush_control;
+	__le16 reserved;
+} __attribute__ ((packed));
+
 /*
  * REPLY_WEP_KEY = 0x20
  */
@@ -3452,6 +3490,41 @@ struct iwl_missed_beacon_notif {
 #define HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX          (9)
 #define HD_OFDM_ENERGY_TH_IN_INDEX                  (10)
 
+/*
+ * Additional table entries in enhance SENSITIVITY_CMD
+ */
+#define HD_INA_NON_SQUARE_DET_OFDM_INDEX		(11)
+#define HD_INA_NON_SQUARE_DET_CCK_INDEX			(12)
+#define HD_CORR_11_INSTEAD_OF_CORR_9_EN_INDEX		(13)
+#define HD_OFDM_NON_SQUARE_DET_SLOPE_MRC_INDEX		(14)
+#define HD_OFDM_NON_SQUARE_DET_INTERCEPT_MRC_INDEX	(15)
+#define HD_OFDM_NON_SQUARE_DET_SLOPE_INDEX		(16)
+#define HD_OFDM_NON_SQUARE_DET_INTERCEPT_INDEX		(17)
+#define HD_CCK_NON_SQUARE_DET_SLOPE_MRC_INDEX		(18)
+#define HD_CCK_NON_SQUARE_DET_INTERCEPT_MRC_INDEX	(19)
+#define HD_CCK_NON_SQUARE_DET_SLOPE_INDEX		(20)
+#define HD_CCK_NON_SQUARE_DET_INTERCEPT_INDEX		(21)
+#define HD_RESERVED					(22)
+
+/* number of entries for enhanced tbl */
+#define ENHANCE_HD_TABLE_SIZE  (23)
+
+/* number of additional entries for enhanced tbl */
+#define ENHANCE_HD_TABLE_ENTRIES  (ENHANCE_HD_TABLE_SIZE - HD_TABLE_SIZE)
+
+#define HD_INA_NON_SQUARE_DET_OFDM_DATA			cpu_to_le16(0)
+#define HD_INA_NON_SQUARE_DET_CCK_DATA			cpu_to_le16(0)
+#define HD_CORR_11_INSTEAD_OF_CORR_9_EN_DATA		cpu_to_le16(0)
+#define HD_OFDM_NON_SQUARE_DET_SLOPE_MRC_DATA		cpu_to_le16(668)
+#define HD_OFDM_NON_SQUARE_DET_INTERCEPT_MRC_DATA	cpu_to_le16(4)
+#define HD_OFDM_NON_SQUARE_DET_SLOPE_DATA		cpu_to_le16(486)
+#define HD_OFDM_NON_SQUARE_DET_INTERCEPT_DATA		cpu_to_le16(37)
+#define HD_CCK_NON_SQUARE_DET_SLOPE_MRC_DATA		cpu_to_le16(853)
+#define HD_CCK_NON_SQUARE_DET_INTERCEPT_MRC_DATA	cpu_to_le16(4)
+#define HD_CCK_NON_SQUARE_DET_SLOPE_DATA		cpu_to_le16(476)
+#define HD_CCK_NON_SQUARE_DET_INTERCEPT_DATA		cpu_to_le16(99)
+
+
 /* Control field in struct iwl_sensitivity_cmd */
 #define SENSITIVITY_CMD_CONTROL_DEFAULT_TABLE	cpu_to_le16(0)
 #define SENSITIVITY_CMD_CONTROL_WORK_TABLE	cpu_to_le16(1)
@@ -3468,6 +3541,14 @@ struct iwl_sensitivity_cmd {
 	__le16 table[HD_TABLE_SIZE];	/* use HD_* as index */
 } __attribute__ ((packed));
 
+/*
+ *
+ */
+struct iwl_enhance_sensitivity_cmd {
+	__le16 control;			/* always use "1" */
+	__le16 enhance_table[ENHANCE_HD_TABLE_SIZE];	/* use HD_* as index */
+} __attribute__ ((packed));
+
 
 /**
  * REPLY_PHY_CALIBRATION_CMD = 0xb0 (command, has simple generic response)

drivers/net/wireless/iwlwifi/iwl-core.c

@@ -2627,7 +2627,7 @@ static void iwl_force_rf_reset(struct iwl_priv *priv)
 }
 
 
-int iwl_force_reset(struct iwl_priv *priv, int mode)
+int iwl_force_reset(struct iwl_priv *priv, int mode, bool external)
 {
 	struct iwl_force_reset *force_reset;
 
@@ -2640,12 +2640,14 @@ int iwl_force_reset(struct iwl_priv *priv, int mode)
 	}
 	force_reset = &priv->force_reset[mode];
 	force_reset->reset_request_count++;
-	if (force_reset->last_force_reset_jiffies &&
-	    time_after(force_reset->last_force_reset_jiffies +
-	    force_reset->reset_duration, jiffies)) {
-		IWL_DEBUG_INFO(priv, "force reset rejected\n");
-		force_reset->reset_reject_count++;
-		return -EAGAIN;
+	if (!external) {
+		if (force_reset->last_force_reset_jiffies &&
+		    time_after(force_reset->last_force_reset_jiffies +
+		    force_reset->reset_duration, jiffies)) {
+			IWL_DEBUG_INFO(priv, "force reset rejected\n");
+			force_reset->reset_reject_count++;
+			return -EAGAIN;
+		}
 	}
 	force_reset->reset_success_count++;
 	force_reset->last_force_reset_jiffies = jiffies;
@@ -2655,6 +2657,19 @@ int iwl_force_reset(struct iwl_priv *priv, int mode)
 		iwl_force_rf_reset(priv);
 		break;
 	case IWL_FW_RESET:
+		/*
+		 * if the request is from external(ex: debugfs),
+		 * then always perform the request in regardless the module
+		 * parameter setting
+		 * if the request is from internal (uCode error or driver
+		 * detect failure), then fw_restart module parameter
+		 * need to be check before performing firmware reload
+		 */
+		if (!external && !priv->cfg->mod_params->restart_fw) {
+			IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
+				       "module parameter setting\n");
+			break;
+		}
 		IWL_ERR(priv, "On demand firmware reload\n");
 		/* Set the FW error flag -- cleared on iwl_down */
 		set_bit(STATUS_FW_ERROR, &priv->status);
@@ -2713,7 +2728,7 @@ static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
 					"queue %d stuck %d time. Fw reload.\n",
 					q->id, q->repeat_same_read_ptr);
 				q->repeat_same_read_ptr = 0;
-				iwl_force_reset(priv, IWL_FW_RESET);
+				iwl_force_reset(priv, IWL_FW_RESET, false);
 			} else {
 				q->repeat_same_read_ptr++;
 				IWL_DEBUG_RADIO(priv,

drivers/net/wireless/iwlwifi/iwl-core.h

@@ -205,6 +205,9 @@ struct iwl_lib_ops {
 	/* check for ack health */
 	bool (*check_ack_health)(struct iwl_priv *priv,
 					struct iwl_rx_packet *pkt);
+	int (*txfifo_flush)(struct iwl_priv *priv, u16 flush_control);
+	void (*dev_txfifo_flush)(struct iwl_priv *priv, u16 flush_control);
+
 	struct iwl_debugfs_ops debugfs_ops;
 };
 
@@ -525,7 +528,7 @@ int iwl_mac_hw_scan(struct ieee80211_hw *hw,
 		    struct cfg80211_scan_request *req);
 void iwl_bg_start_internal_scan(struct work_struct *work);
 void iwl_internal_short_hw_scan(struct iwl_priv *priv);
-int iwl_force_reset(struct iwl_priv *priv, int mode);
+int iwl_force_reset(struct iwl_priv *priv, int mode, bool external);
 u16 iwl_fill_probe_req(struct iwl_priv *priv, struct ieee80211_mgmt *frame,
 		       const u8 *ta, const u8 *ie, int ie_len, int left);
 void iwl_setup_rx_scan_handlers(struct iwl_priv *priv);

drivers/net/wireless/iwlwifi/iwl-debugfs.c

@@ -1487,7 +1487,7 @@ static ssize_t iwl_dbgfs_force_reset_write(struct file *file,
 	switch (reset) {
 	case IWL_RF_RESET:
 	case IWL_FW_RESET:
-		ret = iwl_force_reset(priv, reset);
+		ret = iwl_force_reset(priv, reset, true);
 		break;
 	default:
 		return -EINVAL;
@@ -1495,6 +1495,30 @@ static ssize_t iwl_dbgfs_force_reset_write(struct file *file,
 	return ret ? ret : count;
 }
 
+static ssize_t iwl_dbgfs_txfifo_flush_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 flush;
+
+	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", &flush) != 1)
+		return -EINVAL;
+
+	if (iwl_is_rfkill(priv))
+		return -EFAULT;
+
+	priv->cfg->ops->lib->dev_txfifo_flush(priv, IWL_DROP_ALL);
+
+	return count;
+}
+
 DEBUGFS_READ_FILE_OPS(rx_statistics);
 DEBUGFS_READ_FILE_OPS(tx_statistics);
 DEBUGFS_READ_WRITE_FILE_OPS(traffic_log);
@@ -1516,6 +1540,7 @@ DEBUGFS_READ_WRITE_FILE_OPS(plcp_delta);
 DEBUGFS_READ_WRITE_FILE_OPS(force_reset);
 DEBUGFS_READ_FILE_OPS(rxon_flags);
 DEBUGFS_READ_FILE_OPS(rxon_filter_flags);
+DEBUGFS_WRITE_FILE_OPS(txfifo_flush);
 
 /*
  * Create the debugfs files and directories
@@ -1574,6 +1599,8 @@ int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
 	DEBUGFS_ADD_FILE(ucode_rx_stats, dir_debug, S_IRUSR);
 	DEBUGFS_ADD_FILE(ucode_tx_stats, dir_debug, S_IRUSR);
 	DEBUGFS_ADD_FILE(ucode_general_stats, dir_debug, S_IRUSR);
+	if (priv->cfg->ops->lib->dev_txfifo_flush)
+		DEBUGFS_ADD_FILE(txfifo_flush, dir_debug, S_IWUSR);
 
 	if (priv->cfg->sensitivity_calib_by_driver)
 		DEBUGFS_ADD_FILE(sensitivity, dir_debug, S_IRUSR);

drivers/net/wireless/iwlwifi/iwl-dev.h

@@ -570,6 +570,7 @@ enum iwl_ucode_tlv_type {
 	IWL_UCODE_TLV_INIT_EVTLOG_PTR	= 11,
 	IWL_UCODE_TLV_INIT_EVTLOG_SIZE	= 12,
 	IWL_UCODE_TLV_INIT_ERRLOG_PTR	= 13,
+	IWL_UCODE_TLV_ENHANCE_SENS_TBL	= 14,
 };
 
 struct iwl_ucode_tlv {
@@ -1193,7 +1194,9 @@ struct iwl_priv {
 	u8 start_calib;
 	struct iwl_sensitivity_data sensitivity_data;
 	struct iwl_chain_noise_data chain_noise_data;
+	bool enhance_sensitivity_table;
 	__le16 sensitivity_tbl[HD_TABLE_SIZE];
+	__le16 enhance_sensitivity_tbl[ENHANCE_HD_TABLE_ENTRIES];
 
 	struct iwl_ht_config current_ht_config;
 
@@ -1345,6 +1348,7 @@ struct iwl_priv {
 	struct work_struct ct_enter;
 	struct work_struct ct_exit;
 	struct work_struct start_internal_scan;
+	struct work_struct tx_flush;
 
 	struct tasklet_struct irq_tasklet;
 

drivers/net/wireless/iwlwifi/iwl-hcmd.c

@@ -49,6 +49,7 @@ const char *get_cmd_string(u8 cmd)
 		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_3945_RX);
 		IWL_CMD(REPLY_TX);

drivers/net/wireless/iwlwifi/iwl-rx.c

@@ -238,7 +238,7 @@ void iwl_recover_from_statistics(struct iwl_priv *priv,
 				 */
 				IWL_ERR(priv, "low ack count detected, "
 					"restart firmware\n");
-				if (!iwl_force_reset(priv, IWL_FW_RESET))
+				if (!iwl_force_reset(priv, IWL_FW_RESET, false))
 					return;
 			}
 		}
@@ -249,7 +249,7 @@ void iwl_recover_from_statistics(struct iwl_priv *priv,
 				 * high plcp error detected
 				 * reset Radio
 				 */
-				iwl_force_reset(priv, IWL_RF_RESET);
+				iwl_force_reset(priv, IWL_RF_RESET, false);
 			}
 		}
 	}