wil6210: fix max. MPDU size
When configuring Tx/Rx VRING's, driver need to specify max. MPDU size
It should take into account all overhead introduced by 802.3->208.11
transformation.
Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
diff --git a/drivers/net/wireless/ath/wil6210/wil6210.h b/drivers/net/wireless/ath/wil6210/wil6210.h
index 1b4efd2..bedb9ed 100644
--- a/drivers/net/wireless/ath/wil6210/wil6210.h
+++ b/drivers/net/wireless/ath/wil6210/wil6210.h
@@ -62,11 +62,21 @@
#define WIL_MAX_AGG_WSIZE (32) /* FW/HW limit */
/* Hardware offload block adds the following:
* 26 bytes - 3-address QoS data header
+ * 8 bytes - IV + EIV (for GCMP)
* 8 bytes - SNAP
+ * 16 bytes - MIC (for GCMP)
* 4 bytes - CRC
- * 24 bytes - security related (if connection is secure)
*/
#define WIL_MAX_MPDU_OVERHEAD (62)
+
+/* Calculate MAC buffer size for the firmware. It includes all overhead,
+ * as it will go over the air, and need to be 8 byte aligned
+ */
+static inline u32 wil_mtu2macbuf(u32 mtu)
+{
+ return ALIGN(mtu + WIL_MAX_MPDU_OVERHEAD, 8);
+}
+
/* Max supported by wil6210 value for interrupt threshold is 5sec. */
#define WIL6210_ITR_TRSH_MAX (5000000)
#define WIL6210_ITR_TRSH_DEFAULT (300) /* usec */