iwlagn: move tx transport functions to iwl-trans-tx-pcie.c

There are still a few functions here and there that should be
put in the transport layer. Mainly the functions that are related to the reclaim flow.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>

drivers/net/wireless/iwlwifi/Makefile

@@ -5,8 +5,8 @@ iwlagn-objs		+= iwl-agn-ucode.o iwl-agn-tx.o
 iwlagn-objs		+= iwl-agn-lib.o iwl-agn-calib.o iwl-io.o
 iwlagn-objs		+= iwl-agn-tt.o iwl-agn-sta.o iwl-agn-eeprom.o
 
-iwlagn-objs 		+= iwl-core.o iwl-eeprom.o iwl-hcmd.o iwl-power.o
-iwlagn-objs 		+= iwl-rx.o iwl-tx.o iwl-sta.o
+iwlagn-objs 		+= iwl-core.o iwl-eeprom.o iwl-power.o
+iwlagn-objs 		+= iwl-rx.o iwl-sta.o
 iwlagn-objs 		+= iwl-scan.o iwl-led.o
 iwlagn-objs             += iwl-agn-rxon.o iwl-agn-ict.o
 iwlagn-objs             += iwl-5000.o
@@ -14,7 +14,7 @@ iwlagn-objs             += iwl-6000.o
 iwlagn-objs             += iwl-1000.o
 iwlagn-objs             += iwl-2000.o
 iwlagn-objs             += iwl-pci.o
-iwlagn-objs             += iwl-trans.o iwl-trans-rx-pcie.o
+iwlagn-objs             += iwl-trans.o iwl-trans-rx-pcie.o iwl-trans-tx-pcie.o
 
 iwlagn-$(CONFIG_IWLWIFI_DEBUGFS) += iwl-debugfs.o
 iwlagn-$(CONFIG_IWLWIFI_DEVICE_TRACING) += iwl-devtrace.o

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

@@ -189,9 +189,6 @@ void iwl_rx_dispatch(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb);
 /* tx */
 void iwlagn_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq,
 				int index);
-int iwlagn_txq_attach_buf_to_tfd(struct iwl_priv *priv,
-				 struct iwl_tx_queue *txq,
-				 dma_addr_t addr, u16 len, u8 reset);
 void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
 			      struct ieee80211_tx_info *info);
 int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb);

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

@@ -336,18 +336,8 @@ static inline void iwl_update_stats(struct iwl_priv *priv, bool is_tx,
 /*****************************************************
 * RX
 ******************************************************/
-void iwl_tx_cmd_complete(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb);
-
 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success);
 
-/* TX helpers */
-
-/*****************************************************
-* TX
-******************************************************/
-void iwl_txq_update_write_ptr(struct iwl_priv *priv, struct iwl_tx_queue *txq);
-int iwl_queue_init(struct iwl_priv *priv, struct iwl_queue *q,
-			  int count, int slots_num, u32 id);
 void iwl_setup_watchdog(struct iwl_priv *priv);
 /*****************************************************
  * TX power
@@ -398,12 +388,6 @@ int __must_check iwl_scan_initiate(struct iwl_priv *priv,
  *****************************************************/
 
 const char *get_cmd_string(u8 cmd);
-int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd);
-int __must_check iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u32 flags,
-				  u16 len, const void *data);
-
-int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd);
-
 void iwl_bg_watchdog(unsigned long data);
 u32 iwl_usecs_to_beacons(struct iwl_priv *priv, u32 usec, u32 beacon_interval);
 __le32 iwl_add_beacon_time(struct iwl_priv *priv, u32 base,

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

-/******************************************************************************
- *
- * GPL LICENSE SUMMARY
- *
- * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
- *
- * 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.GPL.
- *
- * Contact Information:
- *  Intel Linux Wireless <ilw@linux.intel.com>
- * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
- *****************************************************************************/
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <net/mac80211.h>
-
-#include "iwl-dev.h" /* FIXME: remove */
-#include "iwl-debug.h"
-#include "iwl-eeprom.h"
-#include "iwl-core.h"
-
-
-const char *get_cmd_string(u8 cmd)
-{
-	switch (cmd) {
-		IWL_CMD(REPLY_ALIVE);
-		IWL_CMD(REPLY_ERROR);
-		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);
-	default:
-		return "UNKNOWN";
-
-	}
-}
-
-#define HOST_COMPLETE_TIMEOUT (2 * HZ)
-
-static void iwl_generic_cmd_callback(struct iwl_priv *priv,
-				     struct iwl_device_cmd *cmd,
-				     struct iwl_rx_packet *pkt)
-{
-	if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
-		IWL_ERR(priv, "Bad return from %s (0x%08X)\n",
-			get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
-		return;
-	}
-
-#ifdef CONFIG_IWLWIFI_DEBUG
-	switch (cmd->hdr.cmd) {
-	case REPLY_TX_LINK_QUALITY_CMD:
-	case SENSITIVITY_CMD:
-		IWL_DEBUG_HC_DUMP(priv, "back from %s (0x%08X)\n",
-				get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
-		break;
-	default:
-		IWL_DEBUG_HC(priv, "back from %s (0x%08X)\n",
-				get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
-	}
-#endif
-}
-
-static int iwl_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
-{
-	int ret;
-
-	/* An asynchronous command can not expect an SKB to be set. */
-	if (WARN_ON(cmd->flags & CMD_WANT_SKB))
-		return -EINVAL;
-
-	/* Assign a generic callback if one is not provided */
-	if (!cmd->callback)
-		cmd->callback = iwl_generic_cmd_callback;
-
-	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
-		return -EBUSY;
-
-	ret = iwl_enqueue_hcmd(priv, cmd);
-	if (ret < 0) {
-		IWL_ERR(priv, "Error sending %s: enqueue_hcmd failed: %d\n",
-			  get_cmd_string(cmd->id), ret);
-		return ret;
-	}
-	return 0;
-}
-
-static int iwl_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
-{
-	int cmd_idx;
-	int ret;
-
-	lockdep_assert_held(&priv->mutex);
-
-	 /* A synchronous command can not have a callback set. */
-	if (WARN_ON(cmd->callback))
-		return -EINVAL;
-
-	IWL_DEBUG_INFO(priv, "Attempting to send sync command %s\n",
-			get_cmd_string(cmd->id));
-
-	set_bit(STATUS_HCMD_ACTIVE, &priv->status);
-	IWL_DEBUG_INFO(priv, "Setting HCMD_ACTIVE for command %s\n",
-			get_cmd_string(cmd->id));
-
-	cmd_idx = iwl_enqueue_hcmd(priv, cmd);
-	if (cmd_idx < 0) {
-		ret = cmd_idx;
-		clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
-		IWL_ERR(priv, "Error sending %s: enqueue_hcmd failed: %d\n",
-			  get_cmd_string(cmd->id), ret);
-		return ret;
-	}
-
-	ret = wait_event_interruptible_timeout(priv->wait_command_queue,
-			!test_bit(STATUS_HCMD_ACTIVE, &priv->status),
-			HOST_COMPLETE_TIMEOUT);
-	if (!ret) {
-		if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
-			IWL_ERR(priv,
-				"Error sending %s: time out after %dms.\n",
-				get_cmd_string(cmd->id),
-				jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
-
-			clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
-			IWL_DEBUG_INFO(priv, "Clearing HCMD_ACTIVE for command %s\n",
-				       get_cmd_string(cmd->id));
-			ret = -ETIMEDOUT;
-			goto cancel;
-		}
-	}
-
-	if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
-		IWL_ERR(priv, "Command %s aborted: RF KILL Switch\n",
-			       get_cmd_string(cmd->id));
-		ret = -ECANCELED;
-		goto fail;
-	}
-	if (test_bit(STATUS_FW_ERROR, &priv->status)) {
-		IWL_ERR(priv, "Command %s failed: FW Error\n",
-			       get_cmd_string(cmd->id));
-		ret = -EIO;
-		goto fail;
-	}
-	if ((cmd->flags & CMD_WANT_SKB) && !cmd->reply_page) {
-		IWL_ERR(priv, "Error: Response NULL in '%s'\n",
-			  get_cmd_string(cmd->id));
-		ret = -EIO;
-		goto cancel;
-	}
-
-	return 0;
-
-cancel:
-	if (cmd->flags & CMD_WANT_SKB) {
-		/*
-		 * Cancel the CMD_WANT_SKB flag for the cmd in the
-		 * TX cmd queue. Otherwise in case the cmd comes
-		 * in later, it will possibly set an invalid
-		 * address (cmd->meta.source).
-		 */
-		priv->txq[priv->cmd_queue].meta[cmd_idx].flags &=
-							~CMD_WANT_SKB;
-	}
-fail:
-	if (cmd->reply_page) {
-		iwl_free_pages(priv, cmd->reply_page);
-		cmd->reply_page = 0;
-	}
-
-	return ret;
-}
-
-int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
-{
-	if (cmd->flags & CMD_ASYNC)
-		return iwl_send_cmd_async(priv, cmd);
-
-	return iwl_send_cmd_sync(priv, cmd);
-}
-
-int iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u32 flags, u16 len,
-		     const void *data)
-{
-	struct iwl_host_cmd cmd = {
-		.id = id,
-		.len = { len, },
-		.data = { data, },
-		.flags = flags,
-	};
-
-	return iwl_send_cmd(priv, &cmd);
-}

drivers/net/wireless/iwlwifi/iwl-trans-int-pcie.h

@@ -32,11 +32,31 @@
 /*This file includes the declaration that are internal to the
  * trans_pcie layer */
 
+/*****************************************************
+* RX
+******************************************************/
 void iwl_bg_rx_replenish(struct work_struct *data);
 void iwl_irq_tasklet(struct iwl_priv *priv);
 void iwlagn_rx_replenish(struct iwl_priv *priv);
 void iwl_rx_queue_update_write_ptr(struct iwl_priv *priv,
 			struct iwl_rx_queue *q);
 
+/*****************************************************
+* TX / HCMD
+******************************************************/
+void iwl_txq_update_write_ptr(struct iwl_priv *priv, struct iwl_tx_queue *txq);
+void iwlagn_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq,
+				int index);
+int iwlagn_txq_attach_buf_to_tfd(struct iwl_priv *priv,
+				 struct iwl_tx_queue *txq,
+				 dma_addr_t addr, u16 len, u8 reset);
+int iwl_queue_init(struct iwl_priv *priv, struct iwl_queue *q,
+			  int count, int slots_num, u32 id);
+int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd);
+int __must_check iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u32 flags,
+			u16 len, const void *data);
+void iwl_tx_cmd_complete(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb);
+
+
 #endif /* __iwl_trans_int_pcie_h__ */
 

drivers/net/wireless/iwlwifi/iwl-tx.c → drivers/net/wireless/iwlwifi/iwl-trans-tx-pcie.c

@@ -26,18 +26,17 @@
  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  *
  *****************************************************************************/
-
 #include <linux/etherdevice.h>
-#include <linux/sched.h>
 #include <linux/slab.h>
+#include <linux/sched.h>
 #include <net/mac80211.h>
-#include "iwl-eeprom.h"
+
 #include "iwl-agn.h"
 #include "iwl-dev.h"
 #include "iwl-core.h"
-#include "iwl-sta.h"
 #include "iwl-io.h"
 #include "iwl-helpers.h"
+#include "iwl-trans-int-pcie.h"
 
 /**
  * iwl_txq_update_write_ptr - Send new write index to hardware
@@ -303,7 +302,7 @@ int iwl_queue_init(struct iwl_priv *priv, struct iwl_queue *q,
  * failed. On success, it turns the index (> 0) of command in the
  * command queue.
  */
-int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
+static int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 {
 	struct iwl_tx_queue *txq = &priv->txq[priv->cmd_queue];
 	struct iwl_queue *q = &txq->q;
@@ -574,3 +573,236 @@ void iwl_tx_cmd_complete(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
 
 	spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 }
+
+const char *get_cmd_string(u8 cmd)
+{
+	switch (cmd) {
+		IWL_CMD(REPLY_ALIVE);
+		IWL_CMD(REPLY_ERROR);
+		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);
+	default:
+		return "UNKNOWN";
+
+	}
+}
+
+#define HOST_COMPLETE_TIMEOUT (2 * HZ)
+
+static void iwl_generic_cmd_callback(struct iwl_priv *priv,
+				     struct iwl_device_cmd *cmd,
+				     struct iwl_rx_packet *pkt)
+{
+	if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
+		IWL_ERR(priv, "Bad return from %s (0x%08X)\n",
+			get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
+		return;
+	}
+
+#ifdef CONFIG_IWLWIFI_DEBUG
+	switch (cmd->hdr.cmd) {
+	case REPLY_TX_LINK_QUALITY_CMD:
+	case SENSITIVITY_CMD:
+		IWL_DEBUG_HC_DUMP(priv, "back from %s (0x%08X)\n",
+				get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
+		break;
+	default:
+		IWL_DEBUG_HC(priv, "back from %s (0x%08X)\n",
+				get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
+	}
+#endif
+}
+
+static int iwl_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
+{
+	int ret;
+
+	/* An asynchronous command can not expect an SKB to be set. */
+	if (WARN_ON(cmd->flags & CMD_WANT_SKB))
+		return -EINVAL;
+
+	/* Assign a generic callback if one is not provided */
+	if (!cmd->callback)
+		cmd->callback = iwl_generic_cmd_callback;
+
+	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
+		return -EBUSY;
+
+	ret = iwl_enqueue_hcmd(priv, cmd);
+	if (ret < 0) {
+		IWL_ERR(priv, "Error sending %s: enqueue_hcmd failed: %d\n",
+			  get_cmd_string(cmd->id), ret);
+		return ret;
+	}
+	return 0;
+}
+
+static int iwl_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
+{
+	int cmd_idx;
+	int ret;
+
+	lockdep_assert_held(&priv->mutex);
+
+	 /* A synchronous command can not have a callback set. */
+	if (WARN_ON(cmd->callback))
+		return -EINVAL;
+
+	IWL_DEBUG_INFO(priv, "Attempting to send sync command %s\n",
+			get_cmd_string(cmd->id));
+
+	set_bit(STATUS_HCMD_ACTIVE, &priv->status);
+	IWL_DEBUG_INFO(priv, "Setting HCMD_ACTIVE for command %s\n",
+			get_cmd_string(cmd->id));
+
+	cmd_idx = iwl_enqueue_hcmd(priv, cmd);
+	if (cmd_idx < 0) {
+		ret = cmd_idx;
+		clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
+		IWL_ERR(priv, "Error sending %s: enqueue_hcmd failed: %d\n",
+			  get_cmd_string(cmd->id), ret);
+		return ret;
+	}
+
+	ret = wait_event_interruptible_timeout(priv->wait_command_queue,
+			!test_bit(STATUS_HCMD_ACTIVE, &priv->status),
+			HOST_COMPLETE_TIMEOUT);
+	if (!ret) {
+		if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
+			IWL_ERR(priv,
+				"Error sending %s: time out after %dms.\n",
+				get_cmd_string(cmd->id),
+				jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
+
+			clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
+			IWL_DEBUG_INFO(priv, "Clearing HCMD_ACTIVE for command"
+				 "%s\n", get_cmd_string(cmd->id));
+			ret = -ETIMEDOUT;
+			goto cancel;
+		}
+	}
+
+	if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
+		IWL_ERR(priv, "Command %s aborted: RF KILL Switch\n",
+			       get_cmd_string(cmd->id));
+		ret = -ECANCELED;
+		goto fail;
+	}
+	if (test_bit(STATUS_FW_ERROR, &priv->status)) {
+		IWL_ERR(priv, "Command %s failed: FW Error\n",
+			       get_cmd_string(cmd->id));
+		ret = -EIO;
+		goto fail;
+	}
+	if ((cmd->flags & CMD_WANT_SKB) && !cmd->reply_page) {
+		IWL_ERR(priv, "Error: Response NULL in '%s'\n",
+			  get_cmd_string(cmd->id));
+		ret = -EIO;
+		goto cancel;
+	}
+
+	return 0;
+
+cancel:
+	if (cmd->flags & CMD_WANT_SKB) {
+		/*
+		 * Cancel the CMD_WANT_SKB flag for the cmd in the
+		 * TX cmd queue. Otherwise in case the cmd comes
+		 * in later, it will possibly set an invalid
+		 * address (cmd->meta.source).
+		 */
+		priv->txq[priv->cmd_queue].meta[cmd_idx].flags &=
+							~CMD_WANT_SKB;
+	}
+fail:
+	if (cmd->reply_page) {
+		iwl_free_pages(priv, cmd->reply_page);
+		cmd->reply_page = 0;
+	}
+
+	return ret;
+}
+
+int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
+{
+	if (cmd->flags & CMD_ASYNC)
+		return iwl_send_cmd_async(priv, cmd);
+
+	return iwl_send_cmd_sync(priv, cmd);
+}
+
+int iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u32 flags, u16 len,
+		     const void *data)
+{
+	struct iwl_host_cmd cmd = {
+		.id = id,
+		.len = { len, },
+		.data = { data, },
+		.flags = flags,
+	};
+
+	return iwl_send_cmd(priv, &cmd);
+}

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

@@ -60,6 +60,10 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  *****************************************************************************/
+
+ /*This file includes the declaration that are exported from the transport
+ * layer */
+
 static inline int trans_rx_init(struct iwl_priv *priv)
 {
 	return priv->trans.ops->rx_init(priv);