iwlwifi: fix host command header according the HW spec

This patch aligns definition of host command with the spec. The
inaccuracies weren't critical though.
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

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

@@ -163,6 +163,13 @@ enum {
 /* iwl_cmd_header flags value */
 #define IWL_CMD_FAILED_MSK 0x40
 
+#define SEQ_TO_QUEUE(s)	(((s) >> 8) & 0x1f)
+#define QUEUE_TO_SEQ(q)	(((q) & 0x1f) << 8)
+#define SEQ_TO_INDEX(s)	((s) & 0xff)
+#define INDEX_TO_SEQ(i)	((i) & 0xff)
+#define SEQ_HUGE_FRAME	__constant_cpu_to_le16(0x4000)
+#define SEQ_RX_FRAME	__constant_cpu_to_le16(0x8000)
+
 /**
  * struct iwl_cmd_header
  *
@@ -171,7 +178,7 @@ enum {
  */
 struct iwl_cmd_header {
 	u8 cmd;		/* Command ID:  REPLY_RXON, etc. */
-	u8 flags;	/* IWL_CMD_* */
+	u8 flags;	/* 0:5 reserved, 6 abort, 7 internal */
 	/*
 	 * The driver sets up the sequence number to values of its chosing.
 	 * uCode does not use this value, but passes it back to the driver
@@ -187,11 +194,12 @@ struct iwl_cmd_header {
 	 *
 	 * The Linux driver uses the following format:
 	 *
-	 *  0:7    index/position within Tx queue
-	 *  8:13   Tx queue selection
-	 * 14:14   driver sets this to indicate command is in the 'huge'
-	 *         storage at the end of the command buffers, i.e. scan cmd
-	 * 15:15   uCode sets this in uCode-originated response/notification
+	 *  0:7		tfd index - position within TX queue
+	 *  8:12	TX queue id
+	 *  13		reserved
+	 *  14		huge - driver sets this to indicate command is in the
+	 *  		'huge' storage at the end of the command buffers
+	 *  15		unsolicited RX or uCode-originated notification
 	 */
 	__le16 sequence;
 

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

@@ -225,12 +225,6 @@ struct iwl_frame {
 	struct list_head list;
 };
 
-#define SEQ_TO_QUEUE(x)  ((x >> 8) & 0xbf)
-#define QUEUE_TO_SEQ(x)  ((x & 0xbf) << 8)
-#define SEQ_TO_INDEX(x) ((u8)(x & 0xff))
-#define INDEX_TO_SEQ(x) ((u8)(x & 0xff))
-#define SEQ_HUGE_FRAME  (0x4000)
-#define SEQ_RX_FRAME    __constant_cpu_to_le16(0x8000)
 #define SEQ_TO_SN(seq) (((seq) & IEEE80211_SCTL_SEQ) >> 4)
 #define SN_TO_SEQ(ssn) (((ssn) << 4) & IEEE80211_SCTL_SEQ)
 #define MAX_SN ((IEEE80211_SCTL_SEQ) >> 4)

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

@@ -1057,7 +1057,7 @@ int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 	out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 			INDEX_TO_SEQ(q->write_ptr));
 	if (out_cmd->meta.flags & CMD_SIZE_HUGE)
-		out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
+		out_cmd->hdr.sequence |= SEQ_HUGE_FRAME;
 	len = (idx == TFD_CMD_SLOTS) ?
 			IWL_MAX_SCAN_SIZE : sizeof(struct iwl_cmd);
 	phys_addr = pci_map_single(priv->pci_dev, out_cmd, len,
@@ -1192,8 +1192,8 @@ void iwl_tx_cmd_complete(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
 	u16 sequence = le16_to_cpu(pkt->hdr.sequence);
 	int txq_id = SEQ_TO_QUEUE(sequence);
 	int index = SEQ_TO_INDEX(sequence);
-	int huge = sequence & SEQ_HUGE_FRAME;
 	int cmd_index;
+	bool huge = !!(pkt->hdr.sequence & SEQ_HUGE_FRAME);
 	struct iwl_cmd *cmd;
 
 	/* If a Tx command is being handled and it isn't in the actual