iwlwifi: move TX code into iwl-tx.c

This patch moves the sending part of the TX code into iwl-tx.c
including sending host commands.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

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

@@ -1933,76 +1933,6 @@ int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel)
 	return rc;
 }
 
-#define RTS_HCCA_RETRY_LIMIT		3
-#define RTS_DFAULT_RETRY_LIMIT		60
-
-void iwl4965_hw_build_tx_cmd_rate(struct iwl_priv *priv,
-			      struct iwl_cmd *cmd,
-			      struct ieee80211_tx_control *ctrl,
-			      struct ieee80211_hdr *hdr, int sta_id,
-			      int is_hcca)
-{
-	struct iwl_tx_cmd *tx = &cmd->cmd.tx;
-	u8 rts_retry_limit = 0;
-	u8 data_retry_limit = 0;
-	u16 fc = le16_to_cpu(hdr->frame_control);
-	u8 rate_plcp;
-	u16 rate_flags = 0;
-	int rate_idx = min(ctrl->tx_rate->hw_value & 0xffff, IWL_RATE_COUNT - 1);
-
-	rate_plcp = iwl_rates[rate_idx].plcp;
-
-	rts_retry_limit = (is_hcca) ?
-	    RTS_HCCA_RETRY_LIMIT : RTS_DFAULT_RETRY_LIMIT;
-
-	if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
-		rate_flags |= RATE_MCS_CCK_MSK;
-
-
-	if (ieee80211_is_probe_response(fc)) {
-		data_retry_limit = 3;
-		if (data_retry_limit < rts_retry_limit)
-			rts_retry_limit = data_retry_limit;
-	} else
-		data_retry_limit = IWL_DEFAULT_TX_RETRY;
-
-	if (priv->data_retry_limit != -1)
-		data_retry_limit = priv->data_retry_limit;
-
-
-	if (ieee80211_is_data(fc)) {
-		tx->initial_rate_index = 0;
-		tx->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
-	} else {
-		switch (fc & IEEE80211_FCTL_STYPE) {
-		case IEEE80211_STYPE_AUTH:
-		case IEEE80211_STYPE_DEAUTH:
-		case IEEE80211_STYPE_ASSOC_REQ:
-		case IEEE80211_STYPE_REASSOC_REQ:
-			if (tx->tx_flags & TX_CMD_FLG_RTS_MSK) {
-				tx->tx_flags &= ~TX_CMD_FLG_RTS_MSK;
-				tx->tx_flags |= TX_CMD_FLG_CTS_MSK;
-			}
-			break;
-		default:
-			break;
-		}
-
-		/* Alternate between antenna A and B for successive frames */
-		if (priv->use_ant_b_for_management_frame) {
-			priv->use_ant_b_for_management_frame = 0;
-			rate_flags |= RATE_MCS_ANT_B_MSK;
-		} else {
-			priv->use_ant_b_for_management_frame = 1;
-			rate_flags |= RATE_MCS_ANT_A_MSK;
-		}
-	}
-
-	tx->rts_retry_limit = rts_retry_limit;
-	tx->data_retry_limit = data_retry_limit;
-	tx->rate_n_flags = iwl4965_hw_set_rate_n_flags(rate_plcp, rate_flags);
-}
-
 static int iwl4965_shared_mem_rx_idx(struct iwl_priv *priv)
 {
 	struct iwl4965_shared *s = priv->shared_virt;
@@ -2046,40 +1976,6 @@ unsigned int iwl4965_hw_get_beacon_cmd(struct iwl_priv *priv,
 	return (sizeof(*tx_beacon_cmd) + frame_size);
 }
 
-int iwl4965_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv, void *ptr,
-				 dma_addr_t addr, u16 len)
-{
-	int index, is_odd;
-	struct iwl_tfd_frame *tfd = ptr;
-	u32 num_tbs = IWL_GET_BITS(*tfd, num_tbs);
-
-	/* Each TFD can point to a maximum 20 Tx buffers */
-	if ((num_tbs >= MAX_NUM_OF_TBS) || (num_tbs < 0)) {
-		IWL_ERROR("Error can not send more than %d chunks\n",
-			  MAX_NUM_OF_TBS);
-		return -EINVAL;
-	}
-
-	index = num_tbs / 2;
-	is_odd = num_tbs & 0x1;
-
-	if (!is_odd) {
-		tfd->pa[index].tb1_addr = cpu_to_le32(addr);
-		IWL_SET_BITS(tfd->pa[index], tb1_addr_hi,
-			     iwl_get_dma_hi_address(addr));
-		IWL_SET_BITS(tfd->pa[index], tb1_len, len);
-	} else {
-		IWL_SET_BITS(tfd->pa[index], tb2_addr_lo16,
-			     (u32) (addr & 0xffff));
-		IWL_SET_BITS(tfd->pa[index], tb2_addr_hi20, addr >> 16);
-		IWL_SET_BITS(tfd->pa[index], tb2_len, len);
-	}
-
-	IWL_SET_BITS(*tfd, num_tbs, num_tbs + 1);
-
-	return 0;
-}
-
 static int iwl4965_alloc_shared_mem(struct iwl_priv *priv)
 {
 	priv->shared_virt = pci_alloc_consistent(priv->pci_dev,
@@ -3711,7 +3607,6 @@ static struct iwl_hcmd_ops iwl4965_hcmd = {
 
 static struct iwl_hcmd_utils_ops iwl4965_hcmd_utils = {
 	.get_hcmd_size = iwl4965_get_hcmd_size,
-	.enqueue_hcmd = iwl4965_enqueue_hcmd,
 	.build_addsta_hcmd = iwl4965_build_addsta_hcmd,
 #ifdef CONFIG_IWL4965_RUN_TIME_CALIB
 	.chain_noise_reset = iwl4965_chain_noise_reset,

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

@@ -87,7 +87,6 @@ struct iwl_hcmd_ops {
 };
 struct iwl_hcmd_utils_ops {
 	u16 (*get_hcmd_size)(u8 cmd_id, u16 len);
-	int (*enqueue_hcmd)(struct iwl_priv *priv, struct iwl_host_cmd *cmd);
 	u16 (*build_addsta_hcmd)(const struct iwl_addsta_cmd *cmd, u8 *data);
 #ifdef CONFIG_IWLWIFI_RUN_TIME_CALIB
 	void (*gain_computation)(struct iwl_priv *priv,
@@ -208,10 +207,14 @@ void iwl_rx_allocate(struct iwl_priv *priv);
 * TX
 ******************************************************/
 int iwl_txq_ctx_reset(struct iwl_priv *priv);
+int iwl_tx_skb(struct iwl_priv *priv,
+		struct sk_buff *skb, struct ieee80211_tx_control *ctl);
 /* FIXME: remove when free Tx is fully merged into iwlcore */
 int iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq);
 void iwl_hw_txq_ctx_free(struct iwl_priv *priv);
-
+int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv, void *tfd,
+					dma_addr_t addr, u16 len);
+int iwl_txq_update_write_ptr(struct iwl_priv *priv, struct iwl_tx_queue *txq);
 /*****************************************************
  *   S e n d i n g     H o s t     C o m m a n d s   *
  *****************************************************/
@@ -227,6 +230,8 @@ int iwl_send_cmd_pdu_async(struct iwl_priv *priv, u8 id, u16 len,
 			   int (*callback)(struct iwl_priv *priv,
 					   struct iwl_cmd *cmd,
 					   struct sk_buff *skb));
+
+int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd);
 /*************** DRIVER STATUS FUNCTIONS   *****/
 
 #define STATUS_HCMD_ACTIVE	0	/* host command in progress */

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

@@ -689,8 +689,6 @@ extern int iwl4965_hw_set_hw_params(struct iwl_priv *priv);
 extern int iwl4965_hw_nic_stop_master(struct iwl_priv *priv);
 extern void iwl4965_hw_txq_ctx_stop(struct iwl_priv *priv);
 extern int iwl4965_hw_nic_reset(struct iwl_priv *priv);
-extern int iwl4965_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv, void *tfd,
-					dma_addr_t addr, u16 len);
 extern int iwl4965_hw_get_temperature(struct iwl_priv *priv);
 extern unsigned int iwl4965_hw_get_beacon_cmd(struct iwl_priv *priv,
 				 struct iwl_frame *frame, u8 rate);
@@ -719,6 +717,25 @@ extern u8 iwl_find_station(struct iwl_priv *priv, const u8 *bssid);
 extern int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel);
 extern int iwl4965_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index);
 extern int iwl_queue_space(const struct iwl_queue *q);
+static inline int iwl_queue_used(const struct iwl_queue *q, int i)
+{
+	return q->write_ptr > q->read_ptr ?
+		(i >= q->read_ptr && i < q->write_ptr) :
+		!(i < q->read_ptr && i >= q->write_ptr);
+}
+
+
+static inline u8 get_cmd_index(struct iwl_queue *q, u32 index, int is_huge)
+{
+	/* This is for scan command, the big buffer at end of command array */
+	if (is_huge)
+		return q->n_window;	/* must be power of 2 */
+
+	/* Otherwise, use normal size buffers */
+	return index & (q->n_window - 1);
+}
+
+
 struct iwl_priv;
 
 extern void iwl4965_radio_kill_sw(struct iwl_priv *priv, int disable_radio);

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

@@ -139,7 +139,7 @@ static int iwl_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 		return -EBUSY;
 
-	ret = priv->cfg->ops->utils->enqueue_hcmd(priv, cmd);
+	ret = iwl_enqueue_hcmd(priv, cmd);
 	if (ret < 0) {
 		IWL_ERROR("Error sending %s: enqueue_hcmd failed: %d\n",
 			  get_cmd_string(cmd->id), ret);
@@ -170,7 +170,7 @@ int iwl_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 	if (cmd->meta.flags & CMD_WANT_SKB)
 		cmd->meta.source = &cmd->meta;
 
-	cmd_idx = priv->cfg->ops->utils->enqueue_hcmd(priv, cmd);
+	cmd_idx = iwl_enqueue_hcmd(priv, cmd);
 	if (cmd_idx < 0) {
 		ret = cmd_idx;
 		IWL_ERROR("Error sending %s: enqueue_hcmd failed: %d\n",