wl18xx: add fw_status private data

The wl18xx chip passes extra information in the firmware status to the
driver.  Add a private data section to handle that.
Signed-off-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: Arik Nemtsov <arik@wizery.com>

drivers/net/wireless/ti/wl18xx/main.c

@@ -478,7 +478,7 @@ int __devinit wl18xx_probe(struct platform_device *pdev)
 	wl->band_rate_to_idx = wl18xx_band_rate_to_idx;
 	wl->hw_tx_rate_tbl_size = WL18XX_CONF_HW_RXTX_RATE_MAX;
 	wl->hw_min_ht_rate = WL18XX_CONF_HW_RXTX_RATE_MCS0;
-
+	wl->fw_status_priv_len = sizeof(struct wl18xx_fw_status_priv);
 	return wlcore_probe(wl, pdev);
 }
 

drivers/net/wireless/ti/wl18xx/wl18xx.h

@@ -30,4 +30,22 @@ struct wl18xx_priv {
 	u8 cmd_buf[WL18XX_CMD_MAX_SIZE];
 };
 
+#define WL18XX_FW_MAX_TX_STATUS_DESC 33
+
+struct wl18xx_fw_status_priv {
+	/*
+	 * Index in released_tx_desc for first byte that holds
+	 * released tx host desc
+	 */
+	u8 fw_release_idx;
+
+	/*
+	 * Array of host Tx descriptors, where fw_release_idx
+	 * indicated the first released idx.
+	 */
+	u8 released_tx_desc[WL18XX_FW_MAX_TX_STATUS_DESC];
+
+	u8 padding[2];
+};
+
 #endif /* __WL18XX_PRIV_H__ */