iwlwifi: move host command sending functions to core module

1. Host command sending functions moved from iwl4965-base.c to iwl-hcmd.c
in iwlcore module
2. enqueue_hcmd function currently stays in iwl4965-base.c. It is invoked
   through the new 'utils' field in priv's ops.
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Assaf Krauss <assaf.krauss@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/Makefile

 obj-$(CONFIG_IWLCORE)	+= iwlcore.o
-iwlcore-objs 		= iwl-core.o iwl-eeprom.o
+iwlcore-objs 		= iwl-core.o iwl-eeprom.o iwl-hcmd.o
 
 ifeq ($(CONFIG_IWLWIFI_DEBUGFS),y)
 	iwlcore-objs += iwl-debugfs.o

drivers/net/wireless/iwlwifi/iwl-4965-commands.h

@@ -139,7 +139,7 @@ enum {
 	REPLY_PHY_CALIBRATION_CMD = 0xb0,
 	REPLY_RX_PHY_CMD = 0xc0,
 	REPLY_RX_MPDU_CMD = 0xc1,
-	REPLY_4965_RX = 0xc3,
+	REPLY_RX = 0xc3,
 	REPLY_COMPRESSED_BA = 0xc5,
 	REPLY_MAX = 0xff
 };
@@ -151,16 +151,16 @@ enum {
  *
  *****************************************************************************/
 
-/* iwl4965_cmd_header flags value */
+/* iwl_cmd_header flags value */
 #define IWL_CMD_FAILED_MSK 0x40
 
 /**
- * struct iwl4965_cmd_header
+ * struct iwl_cmd_header
  *
  * This header format appears in the beginning of each command sent from the
  * driver, and each response/notification received from uCode.
  */
-struct iwl4965_cmd_header {
+struct iwl_cmd_header {
 	u8 cmd;		/* Command ID:  REPLY_RXON, etc. */
 	u8 flags;	/* IWL_CMD_* */
 	/*
@@ -194,7 +194,7 @@ struct iwl4965_cmd_header {
  * 4965 rate_n_flags bit fields
  *
  * rate_n_flags format is used in following 4965 commands:
- *  REPLY_4965_RX (response only)
+ *  REPLY_RX (response only)
  *  REPLY_TX (both command and response)
  *  REPLY_TX_LINK_QUALITY_CMD
  *
@@ -939,7 +939,7 @@ struct iwl4965_rx_non_cfg_phy {
 } __attribute__ ((packed));
 
 /*
- * REPLY_4965_RX = 0xc3 (response only, not a command)
+ * REPLY_RX = 0xc3 (response only, not a command)
  * Used only for legacy (non 11n) frames.
  */
 #define RX_RES_PHY_CNT 14
@@ -2664,7 +2664,7 @@ struct iwl4965_led_cmd {
 
 struct iwl4965_rx_packet {
 	__le32 len;
-	struct iwl4965_cmd_header hdr;
+	struct iwl_cmd_header hdr;
 	union {
 		struct iwl4965_alive_resp alive_frame;
 		struct iwl4965_rx_frame rx_frame;

drivers/net/wireless/iwlwifi/iwl-4965-hw.h

@@ -113,9 +113,6 @@
 #define TFD_TX_CMD_SLOTS 256
 #define TFD_CMD_SLOTS 32
 
-#define TFD_MAX_PAYLOAD_SIZE (sizeof(struct iwl4965_cmd) - \
-			      sizeof(struct iwl4965_cmd_meta))
-
 /*
  * RX related structures and functions
  */

drivers/net/wireless/iwlwifi/iwl-4965-rs.c

@@ -39,6 +39,7 @@
 #include "../net/mac80211/ieee80211_rate.h"
 
 #include "iwl-4965.h"
+#include "iwl-core.h"
 #include "iwl-helpers.h"
 
 #define RS_NAME "iwl-4965-rs"
@@ -230,7 +231,7 @@ static s32 expected_tpt_mimo40MHzSGI[IWL_RATE_COUNT] = {
 };
 
 static int iwl4965_lq_sync_callback(struct iwl_priv *priv,
-				struct iwl4965_cmd *cmd, struct sk_buff *skb)
+				struct iwl_cmd *cmd, struct sk_buff *skb)
 {
 	/*We didn't cache the SKB; let the caller free it */
 	return 1;
@@ -247,7 +248,7 @@ static int rs_send_lq_cmd(struct iwl_priv *priv,
 #ifdef CONFIG_IWLWIFI_DEBUG
 	int i;
 #endif
-	struct iwl4965_host_cmd cmd = {
+	struct iwl_host_cmd cmd = {
 		.id = REPLY_TX_LINK_QUALITY_CMD,
 		.len = sizeof(struct iwl4965_link_quality_cmd),
 		.meta.flags = flags,
@@ -276,7 +277,7 @@ static int rs_send_lq_cmd(struct iwl_priv *priv,
 
 	if (iwl4965_is_associated(priv) && priv->assoc_station_added &&
 	    priv->lq_mngr.lq_ready)
-		return  iwl4965_send_cmd(priv, &cmd);
+		return  iwl_send_cmd(priv, &cmd);
 
 	return 0;
 }

drivers/net/wireless/iwlwifi/iwl-4965.c

@@ -861,7 +861,7 @@ void iwl4965_rf_kill_ct_config(struct iwl_priv *priv)
 	u32 temp_th;
 	u32 crit_temperature;
 	unsigned long flags;
-	int rc = 0;
+	int ret = 0;
 
 	spin_lock_irqsave(&priv->lock, flags);
 	iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR,
@@ -882,9 +882,9 @@ void iwl4965_rf_kill_ct_config(struct iwl_priv *priv)
 
 	crit_temperature = ((temp_th * (R3-R1))/CT_LIMIT_CONST) + R2;
 	cmd.critical_temperature_R =  cpu_to_le32(crit_temperature);
-	rc = iwl4965_send_cmd_pdu(priv,
-			      REPLY_CT_KILL_CONFIG_CMD, sizeof(cmd), &cmd);
-	if (rc)
+	ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
+			       sizeof(cmd), &cmd);
+	if (ret)
 		IWL_ERROR("REPLY_CT_KILL_CONFIG_CMD failed\n");
 	else
 		IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded\n");
@@ -1157,7 +1157,7 @@ static int iwl4965_sens_auto_corr_ofdm(struct iwl_priv *priv,
 }
 
 static int iwl4965_sensitivity_callback(struct iwl_priv *priv,
-				    struct iwl4965_cmd *cmd, struct sk_buff *skb)
+				    struct iwl_cmd *cmd, struct sk_buff *skb)
 {
 	/* We didn't cache the SKB; let the caller free it */
 	return 1;
@@ -1166,15 +1166,15 @@ static int iwl4965_sensitivity_callback(struct iwl_priv *priv,
 /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */
 static int iwl4965_sensitivity_write(struct iwl_priv *priv, u8 flags)
 {
-	int rc = 0;
 	struct iwl4965_sensitivity_cmd cmd ;
 	struct iwl4965_sensitivity_data *data = NULL;
-	struct iwl4965_host_cmd cmd_out = {
+	struct iwl_host_cmd cmd_out = {
 		.id = SENSITIVITY_CMD,
 		.len = sizeof(struct iwl4965_sensitivity_cmd),
 		.meta.flags = flags,
 		.data = &cmd,
 	};
+	int ret;
 
 	data = &(priv->sensitivity_data);
 
@@ -1232,20 +1232,18 @@ static int iwl4965_sensitivity_write(struct iwl_priv *priv, u8 flags)
 	memcpy(&(priv->sensitivity_tbl[0]), &(cmd.table[0]),
 	       sizeof(u16)*HD_TABLE_SIZE);
 
-	rc = iwl4965_send_cmd(priv, &cmd_out);
-	if (!rc) {
-		IWL_DEBUG_CALIB("SENSITIVITY_CMD succeeded\n");
-		return rc;
-	}
+	ret = iwl_send_cmd(priv, &cmd_out);
+	if (ret)
+		IWL_ERROR("SENSITIVITY_CMD failed\n");
 
-	return 0;
+	return ret;
 }
 
 void iwl4965_init_sensitivity(struct iwl_priv *priv, u8 flags, u8 force)
 {
-	int rc = 0;
-	int i;
 	struct iwl4965_sensitivity_data *data = NULL;
+	int i;
+	int ret  = 0;
 
 	IWL_DEBUG_CALIB("Start iwl4965_init_sensitivity\n");
 
@@ -1289,8 +1287,8 @@ void iwl4965_init_sensitivity(struct iwl_priv *priv, u8 flags, u8 force)
 		memset(&(priv->sensitivity_tbl[0]), 0,
 		    sizeof(u16)*HD_TABLE_SIZE);
 
-	rc |= iwl4965_sensitivity_write(priv, flags);
-	IWL_DEBUG_CALIB("<<return 0x%X\n", rc);
+	ret |= iwl4965_sensitivity_write(priv, flags);
+	IWL_DEBUG_CALIB("<<return 0x%X\n", ret);
 
 	return;
 }
@@ -1302,7 +1300,6 @@ void iwl4965_init_sensitivity(struct iwl_priv *priv, u8 flags, u8 force)
 void iwl4965_chain_noise_reset(struct iwl_priv *priv)
 {
 	struct iwl4965_chain_noise_data *data = NULL;
-	int rc = 0;
 
 	data = &(priv->chain_noise_data);
 	if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl4965_is_associated(priv)) {
@@ -1313,7 +1310,7 @@ void iwl4965_chain_noise_reset(struct iwl_priv *priv)
 		cmd.diff_gain_a = 0;
 		cmd.diff_gain_b = 0;
 		cmd.diff_gain_c = 0;
-		rc = iwl4965_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
+		iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
 				 sizeof(cmd), &cmd);
 		msleep(4);
 		data->state = IWL_CHAIN_NOISE_ACCUMULATE;
@@ -1332,7 +1329,7 @@ static void iwl4965_noise_calibration(struct iwl_priv *priv,
 				      struct iwl4965_notif_statistics *stat_resp)
 {
 	struct iwl4965_chain_noise_data *data = NULL;
-	int rc = 0;
+	int ret = 0;
 
 	u32 chain_noise_a;
 	u32 chain_noise_b;
@@ -1538,9 +1535,9 @@ static void iwl4965_noise_calibration(struct iwl_priv *priv,
 			cmd.diff_gain_a = data->delta_gain_code[0];
 			cmd.diff_gain_b = data->delta_gain_code[1];
 			cmd.diff_gain_c = data->delta_gain_code[2];
-			rc = iwl4965_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
+			ret = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
 					      sizeof(cmd), &cmd);
-			if (rc)
+			if (ret)
 				IWL_DEBUG_CALIB("fail sending cmd "
 					     "REPLY_PHY_CALIBRATION_CMD \n");
 
@@ -1564,7 +1561,6 @@ static void iwl4965_noise_calibration(struct iwl_priv *priv,
 static void iwl4965_sensitivity_calibration(struct iwl_priv *priv,
 					    struct iwl4965_notif_statistics *resp)
 {
-	int rc = 0;
 	u32 rx_enable_time;
 	u32 fa_cck;
 	u32 fa_ofdm;
@@ -1577,6 +1573,7 @@ static void iwl4965_sensitivity_calibration(struct iwl_priv *priv,
 	struct statistics_rx *statistics = &(resp->rx);
 	unsigned long flags;
 	struct statistics_general_data statis;
+	int ret;
 
 	data = &(priv->sensitivity_data);
 
@@ -1661,7 +1658,7 @@ static void iwl4965_sensitivity_calibration(struct iwl_priv *priv,
 
 	iwl4965_sens_auto_corr_ofdm(priv, norm_fa_ofdm, rx_enable_time);
 	iwl4965_sens_energy_cck(priv, norm_fa_cck, rx_enable_time, &statis);
-	rc |= iwl4965_sensitivity_write(priv, CMD_ASYNC);
+	ret = iwl4965_sensitivity_write(priv, CMD_ASYNC);
 
 	return;
 }
@@ -1789,7 +1786,7 @@ int iwl4965_alive_notify(struct iwl_priv *priv)
 	u32 a;
 	int i = 0;
 	unsigned long flags;
-	int rc;
+	int ret;
 
 	spin_lock_irqsave(&priv->lock, flags);
 
@@ -1802,10 +1799,10 @@ int iwl4965_alive_notify(struct iwl_priv *priv)
 		priv->chain_noise_data.delta_gain_code[i] =
 				CHAIN_NOISE_DELTA_GAIN_INIT_VAL;
 #endif /* CONFIG_IWL4965_SENSITIVITY*/
-	rc = iwl4965_grab_nic_access(priv);
-	if (rc) {
+	ret = iwl4965_grab_nic_access(priv);
+	if (ret) {
 		spin_unlock_irqrestore(&priv->lock, flags);
-		return rc;
+		return ret;
 	}
 
 	/* Clear 4965's internal Tx Scheduler data base */
@@ -1868,7 +1865,7 @@ int iwl4965_alive_notify(struct iwl_priv *priv)
 	iwl4965_release_nic_access(priv);
 	spin_unlock_irqrestore(&priv->lock, flags);
 
-	return 0;
+	return ret;
 }
 
 /**
@@ -2719,7 +2716,7 @@ static int iwl4965_fill_txpower_tbl(struct iwl_priv *priv, u8 band, u16 channel,
 int iwl4965_hw_reg_send_txpower(struct iwl_priv *priv)
 {
 	struct iwl4965_txpowertable_cmd cmd = { 0 };
-	int rc = 0;
+	int ret;
 	u8 band = 0;
 	u8 is_fat = 0;
 	u8 ctrl_chan_high = 0;
@@ -2743,14 +2740,16 @@ int iwl4965_hw_reg_send_txpower(struct iwl_priv *priv)
 	cmd.band = band;
 	cmd.channel = priv->active_rxon.channel;
 
-	rc = iwl4965_fill_txpower_tbl(priv, band,
+	ret = iwl4965_fill_txpower_tbl(priv, band,
 				le16_to_cpu(priv->active_rxon.channel),
 				is_fat, ctrl_chan_high, &cmd.tx_power);
-	if (rc)
-		return rc;
+	if (ret)
+		goto out;
 
-	rc = iwl4965_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
-	return rc;
+	ret = iwl_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
+
+out:
+	return ret;
 }
 
 int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel)
@@ -2790,7 +2789,7 @@ int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel)
 		return rc;
 	}
 
-	rc = iwl4965_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
+	rc = iwl_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
 	return rc;
 }
 
@@ -2798,7 +2797,7 @@ int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel)
 #define RTS_DFAULT_RETRY_LIMIT		60
 
 void iwl4965_hw_build_tx_cmd_rate(struct iwl_priv *priv,
-			      struct iwl4965_cmd *cmd,
+			      struct iwl_cmd *cmd,
 			      struct ieee80211_tx_control *ctrl,
 			      struct ieee80211_hdr *hdr, int sta_id,
 			      int is_hcca)
@@ -3863,7 +3862,7 @@ static inline void iwl4965_dbg_report_frame(struct iwl_priv *priv,
 
 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
 
-/* Called for REPLY_4965_RX (legacy ABG frames), or
+/* Called for REPLY_RX (legacy ABG frames), or
  * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
 static void iwl4965_rx_reply_rx(struct iwl_priv *priv,
 				struct iwl4965_rx_mem_buffer *rxb)
@@ -3874,7 +3873,7 @@ static void iwl4965_rx_reply_rx(struct iwl_priv *priv,
 	/* Use phy data (Rx signal strength, etc.) contained within
 	 *   this rx packet for legacy frames,
 	 *   or phy data cached from REPLY_RX_PHY_CMD for HT frames. */
-	int include_phy = (pkt->hdr.cmd == REPLY_4965_RX);
+	int include_phy = (pkt->hdr.cmd == REPLY_RX);
 	struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
 		(struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) :
 		(struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
@@ -4562,7 +4561,7 @@ void iwl4965_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 	/* Update the rate scaling for control frame Tx to AP */
 	link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_setting.bcast_sta_id;
 
-	iwl4965_send_cmd_pdu(priv, REPLY_TX_LINK_QUALITY_CMD, sizeof(link_cmd),
+	iwl_send_cmd_pdu(priv, REPLY_TX_LINK_QUALITY_CMD, sizeof(link_cmd),
 			 &link_cmd);
 }
 
@@ -4915,7 +4914,7 @@ int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw,
 void iwl4965_hw_rx_handler_setup(struct iwl_priv *priv)
 {
 	/* Legacy Rx frames */
-	priv->rx_handlers[REPLY_4965_RX] = iwl4965_rx_reply_rx;
+	priv->rx_handlers[REPLY_RX] = iwl4965_rx_reply_rx;
 
 	/* High-throughput (HT) Rx frames */
 	priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl4965_rx_reply_rx_phy;
@@ -4948,6 +4947,10 @@ void iwl4965_hw_cancel_deferred_work(struct iwl_priv *priv)
 	cancel_delayed_work(&priv->init_alive_start);
 }
 
+static struct iwl_hcmd_utils_ops iwl4965_hcmd_utils = {
+	.enqueue_hcmd = iwl4965_enqueue_hcmd,
+};
+
 static struct iwl_lib_ops iwl4965_lib = {
 	.init_drv = iwl4965_init_drv,
 	.eeprom_ops = {
@@ -4959,6 +4962,7 @@ static struct iwl_lib_ops iwl4965_lib = {
 
 static struct iwl_ops iwl4965_ops = {
 	.lib = &iwl4965_lib,
+	.utils = &iwl4965_hcmd_utils,
 };
 
 static struct iwl_cfg iwl4965_agn_cfg = {

drivers/net/wireless/iwlwifi/iwl-4965.h

@@ -140,7 +140,7 @@ struct iwl4965_tx_info {
 struct iwl4965_tx_queue {
 	struct iwl4965_queue q;
 	struct iwl4965_tfd_frame *bd;
-	struct iwl4965_cmd *cmd;
+	struct iwl_cmd *cmd;
 	dma_addr_t dma_addr_cmd;
 	struct iwl4965_tx_info *txb;
 	int need_update;
@@ -312,15 +312,15 @@ enum {
 	CMD_WANT_SKB = (1 << 2),
 };
 
-struct iwl4965_cmd;
+struct iwl_cmd;
 struct iwl_priv;
 
-struct iwl4965_cmd_meta {
-	struct iwl4965_cmd_meta *source;
+struct iwl_cmd_meta {
+	struct iwl_cmd_meta *source;
 	union {
 		struct sk_buff *skb;
 		int (*callback)(struct iwl_priv *priv,
-				struct iwl4965_cmd *cmd, struct sk_buff *skb);
+				struct iwl_cmd *cmd, struct sk_buff *skb);
 	} __attribute__ ((packed)) u;
 
 	/* The CMD_SIZE_HUGE flag bit indicates that the command
@@ -330,15 +330,15 @@ struct iwl4965_cmd_meta {
 } __attribute__ ((packed));
 
 /**
- * struct iwl4965_cmd
+ * struct iwl_cmd
  *
  * For allocation of the command and tx queues, this establishes the overall
  * size of the largest command we send to uCode, except for a scan command
  * (which is relatively huge; space is allocated separately).
  */
-struct iwl4965_cmd {
-	struct iwl4965_cmd_meta meta;	/* driver data */
-	struct iwl4965_cmd_header hdr;	/* uCode API */
+struct iwl_cmd {
+	struct iwl_cmd_meta meta;	/* driver data */
+	struct iwl_cmd_header hdr;	/* uCode API */
 	union {
 		struct iwl4965_addsta_cmd addsta;
 		struct iwl4965_led_cmd led;
@@ -358,15 +358,15 @@ struct iwl4965_cmd {
 	} __attribute__ ((packed)) cmd;
 } __attribute__ ((packed));
 
-struct iwl4965_host_cmd {
+struct iwl_host_cmd {
 	u8 id;
 	u16 len;
-	struct iwl4965_cmd_meta meta;
+	struct iwl_cmd_meta meta;
 	const void *data;
 };
 
-#define TFD_MAX_PAYLOAD_SIZE (sizeof(struct iwl4965_cmd) - \
-			      sizeof(struct iwl4965_cmd_meta))
+#define TFD_MAX_PAYLOAD_SIZE (sizeof(struct iwl_cmd) - \
+			      sizeof(struct iwl_cmd_meta))
 
 /*
  * RX related structures and functions
@@ -656,10 +656,6 @@ extern int iwl4965_tx_queue_init(struct iwl_priv *priv,
 			     struct iwl4965_tx_queue *txq, int count, u32 id);
 extern void iwl4965_rx_replenish(void *data);
 extern void iwl4965_tx_queue_free(struct iwl_priv *priv, struct iwl4965_tx_queue *txq);
-extern int iwl4965_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len,
-			    const void *data);
-extern int __must_check iwl4965_send_cmd(struct iwl_priv *priv,
-		struct iwl4965_host_cmd *cmd);
 extern unsigned int iwl4965_fill_beacon_frame(struct iwl_priv *priv,
 					struct ieee80211_hdr *hdr,
 					const u8 *dest, int left);
@@ -674,6 +670,7 @@ int iwl4965_init_geos(struct iwl_priv *priv);
 void iwl4965_free_geos(struct iwl_priv *priv);
 
 extern const u8 iwl4965_broadcast_addr[ETH_ALEN];
+int iwl4965_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd);
 
 /*
  * Currently used by iwl-3945-rs... look at restructuring so that it doesn't
@@ -718,7 +715,7 @@ extern unsigned int iwl4965_hw_get_beacon_cmd(struct iwl_priv *priv,
 				 struct iwl4965_frame *frame, u8 rate);
 extern int iwl4965_hw_get_rx_read(struct iwl_priv *priv);
 extern void iwl4965_hw_build_tx_cmd_rate(struct iwl_priv *priv,
-				     struct iwl4965_cmd *cmd,
+				     struct iwl_cmd *cmd,
 				     struct ieee80211_tx_control *ctrl,
 				     struct ieee80211_hdr *hdr,
 				     int sta_id, int tx_id);

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

@@ -63,6 +63,13 @@
 #ifndef __iwl_core_h__
 #define __iwl_core_h__
 
+/************************
+ * forward declarations *
+ ************************/
+struct iwl_host_cmd;
+struct iwl_cmd;
+
+
 #define IWLWIFI_VERSION "1.2.26k"
 #define DRV_COPYRIGHT	"Copyright(c) 2003-2008 Intel Corporation"
 
@@ -75,6 +82,10 @@
 #define IWL_SKU_A       0x2
 #define IWL_SKU_N       0x8
 
+struct iwl_hcmd_utils_ops {
+	int (*enqueue_hcmd)(struct iwl_priv *priv, struct iwl_host_cmd *cmd);
+};
+
 struct iwl_lib_ops {
 	/* iwlwifi driver (priv) init */
 	int (*init_drv)(struct iwl_priv *priv);
@@ -84,6 +95,7 @@ struct iwl_lib_ops {
 
 struct iwl_ops {
 	const struct iwl_lib_ops *lib;
+	const struct iwl_hcmd_utils_ops *utils;
 };
 
 struct iwl_mod_params {
@@ -120,4 +132,18 @@ int iwlcore_set_rxon_channel(struct iwl_priv *priv,
 
 int iwl_setup(struct iwl_priv *priv);
 
+/*****************************************************
+ *   S e n d i n g     H o s t     C o m m a n d s   *
+ *****************************************************/
+
+const char *get_cmd_string(u8 cmd);
+int iwl_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd);
+int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd);
+int iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data);
+int iwl_send_cmd_pdu_async(struct iwl_priv *priv, u8 id, u16 len,
+			   const void *data,
+			   int (*callback)(struct iwl_priv *priv,
+					   struct iwl_cmd *cmd,
+					   struct sk_buff *skb));
+
 #endif /* __iwl_core_h__ */

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

+/******************************************************************************
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2008 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:
+ * Tomas Winkler <tomas.winkler@intel.com>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *****************************************************************************/
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <net/mac80211.h>
+
+#include "iwl-4965.h" /* FIXME: remove */
+#include "iwl-debug.h"
+#include "iwl-eeprom.h"
+#include "iwl-core.h"
+
+
+#define IWL_CMD(x) case x : return #x
+
+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_TX);
+		IWL_CMD(REPLY_RATE_SCALE);
+		IWL_CMD(REPLY_LEDS_CMD);
+		IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
+		IWL_CMD(RADAR_NOTIFICATION);
+		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);
+	default:
+		return "UNKNOWN";
+
+	}
+}
+EXPORT_SYMBOL(get_cmd_string);
+
+#define HOST_COMPLETE_TIMEOUT (HZ / 2)
+
+static int iwl_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
+{
+	int ret;
+
+	BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
+
+	/* An asynchronous command can not expect an SKB to be set. */
+	BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
+
+	/* An asynchronous command MUST have a callback. */
+	BUG_ON(!cmd->meta.u.callback);
+
+	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
+		return -EBUSY;
+
+	ret = priv->cfg->ops->utils->enqueue_hcmd(priv, cmd);
+	if (ret < 0) {
+		IWL_ERROR("Error sending %s: enqueue_hcmd failed: %d\n",
+			  get_cmd_string(cmd->id), ret);
+		return ret;
+	}
+	return 0;
+}
+
+int iwl_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
+{
+	int cmd_idx;
+	int ret;
+	static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
+
+	BUG_ON(cmd->meta.flags & CMD_ASYNC);
+
+	 /* A synchronous command can not have a callback set. */
+	BUG_ON(cmd->meta.u.callback != NULL);
+
+	if (atomic_xchg(&entry, 1)) {
+		IWL_ERROR("Error sending %s: Already sending a host command\n",
+			  get_cmd_string(cmd->id));
+		return -EBUSY;
+	}
+
+	set_bit(STATUS_HCMD_ACTIVE, &priv->status);
+
+	if (cmd->meta.flags & CMD_WANT_SKB)
+		cmd->meta.source = &cmd->meta;
+
+	cmd_idx = priv->cfg->ops->utils->enqueue_hcmd(priv, cmd);
+	if (cmd_idx < 0) {
+		ret = cmd_idx;
+		IWL_ERROR("Error sending %s: enqueue_hcmd failed: %d\n",
+			  get_cmd_string(cmd->id), ret);
+		goto out;
+	}
+
+	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_ERROR("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);
+			ret = -ETIMEDOUT;
+			goto cancel;
+		}
+	}
+
+	if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
+		IWL_DEBUG_INFO("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_DEBUG_INFO("Command %s failed: FW Error\n",
+			       get_cmd_string(cmd->id));
+		ret = -EIO;
+		goto fail;
+	}
+	if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
+		IWL_ERROR("Error: Response NULL in '%s'\n",
+			  get_cmd_string(cmd->id));
+		ret = -EIO;
+		goto out;
+	}
+
+	ret = 0;
+	goto out;
+
+cancel:
+	if (cmd->meta.flags & CMD_WANT_SKB) {
+		struct iwl_cmd *qcmd;
+
+		/* 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). */
+		qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
+		qcmd->meta.flags &= ~CMD_WANT_SKB;
+	}
+fail:
+	if (cmd->meta.u.skb) {
+		dev_kfree_skb_any(cmd->meta.u.skb);
+		cmd->meta.u.skb = NULL;
+	}
+out:
+	atomic_set(&entry, 0);
+	return ret;
+}
+EXPORT_SYMBOL(iwl_send_cmd_sync);
+
+int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
+{
+	if (cmd->meta.flags & CMD_ASYNC)
+		return iwl_send_cmd_async(priv, cmd);
+
+	return iwl_send_cmd_sync(priv, cmd);
+}
+EXPORT_SYMBOL(iwl_send_cmd);
+
+int iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data)
+{
+	struct iwl_host_cmd cmd = {
+		.id = id,
+		.len = len,
+		.data = data,
+	};
+
+	return iwl_send_cmd_sync(priv, &cmd);
+}
+EXPORT_SYMBOL(iwl_send_cmd_pdu);
+
+int iwl_send_cmd_pdu_async(struct iwl_priv *priv,
+			   u8 id, u16 len, const void *data,
+			   int (*callback)(struct iwl_priv *priv,
+					   struct iwl_cmd *cmd,
+					   struct sk_buff *skb))
+{
+	struct iwl_host_cmd cmd = {
+		.id = id,
+		.len = len,
+		.data = data,
+	};
+
+	cmd.meta.flags |= CMD_ASYNC;
+	cmd.meta.u.callback = callback;
+
+	return iwl_send_cmd_async(priv, &cmd);
+}
+EXPORT_SYMBOL(iwl_send_cmd_pdu_async);