iwlwifi: tx fifo queue flush command

Add host command and structure for tx fifo queue flush

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>

2 files changed, 35 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-commands.h b/drivers/net/wireless/iwlwifi/iwl-commands.h
index a304f771bcc3..b28cb4ffedc7 100644
--- a/drivers/net/wireless/iwlwifi/iwl-commands.h
+++ b/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,
@@ -1209,6 +1210,39 @@ 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)
+
+/*
+ * 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
  */
diff --git a/drivers/net/wireless/iwlwifi/iwl-hcmd.c b/drivers/net/wireless/iwlwifi/iwl-hcmd.c
index 51f89e7ba681..258d059ef41f 100644
--- a/drivers/net/wireless/iwlwifi/iwl-hcmd.c
+++ b/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);