ath10k: Document alloc_frag_desc_for_data_pkt config option.

This will help anyone trying to use the ack-rssi reporting
feature with the host-specified TX-rate option in 10.4 firmware.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

diff --git a/drivers/net/wireless/ath/ath10k/wmi.h b/drivers/net/wireless/ath/ath10k/wmi.h
index feebd19ff08cb979c03081538669af02ad9d020a..0fae0daa9215460c380feb6cc9ce01eaab3aa3fa 100644 (file)
--- a/drivers/net/wireless/ath/ath10k/wmi.h
+++ b/drivers/net/wireless/ath/ath10k/wmi.h
@@ -2661,9 +2661,14 @@ struct wmi_resource_config_10_4 {
         */
        __le32 iphdr_pad_config;
 
-       /* qwrap configuration
+       /* qwrap configuration (bits 15-0)
         * 1  - This is qwrap configuration
         * 0  - This is not qwrap
+        *
+        * Bits 31-16 is alloc_frag_desc_for_data_pkt (1 enables, 0 disables)
+        * In order to get ack-RSSI reporting and to specify the tx-rate for
+        * individual frames, this option must be enabled.  This uses an extra
+        * 4 bytes per tx-msdu descriptor, so don't enable it unless you need it.
         */
        __le32 qwrap_config;
 } __packed;