ath10k: add support for qca6174 Rx descriptors

The QCA6174 chip has an extra 4 bytes in
rx_ppdu_end structure which is used in htt_rx_desc
and HTT Rx ring offset setup. This is necessary
for correct Rx for QCA6174 (otherwise Rx
descriptors are overwritten and corrupted).

This means QCA988X will have an extra 4 byte
padding in Rx descriptor layout which is harmless.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

2 files changed, 25 insertions, 2 deletions

diff --git a/drivers/net/wireless/ath/ath10k/htt_rx.c b/drivers/net/wireless/ath/ath10k/htt_rx.c
index 661785fb9906..c1da44f65a4d 100644
--- a/drivers/net/wireless/ath/ath10k/htt_rx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_rx.c
@@ -813,7 +813,7 @@ static void ath10k_htt_rx_h_mactime(struct ath10k *ar,
          *
          * FIXME: Can we get/compute 64bit TSF?
          */
-        status->mactime = __le32_to_cpu(rxd->ppdu_end.tsf_timestamp);
+        status->mactime = __le32_to_cpu(rxd->ppdu_end.common.tsf_timestamp);
         status->flag |= RX_FLAG_MACTIME_END;
 }
 
diff --git a/drivers/net/wireless/ath/ath10k/rx_desc.h b/drivers/net/wireless/ath/ath10k/rx_desc.h
index e1ffdd57a18c..e9cc7787bf5f 100644
--- a/drivers/net/wireless/ath/ath10k/rx_desc.h
+++ b/drivers/net/wireless/ath/ath10k/rx_desc.h
@@ -850,7 +850,7 @@ struct rx_ppdu_start {
 
 #define RX_PPDU_END_INFO1_PPDU_DONE (1 << 15)
 
-struct rx_ppdu_end {
+struct rx_ppdu_end_common {
         __le32 evm_p0;
         __le32 evm_p1;
         __le32 evm_p2;
@@ -873,10 +873,33 @@ struct rx_ppdu_end {
         u8 phy_err_code;
         __le16 flags; /* %RX_PPDU_END_FLAGS_ */
         __le32 info0; /* %RX_PPDU_END_INFO0_ */
+} __packed;
+
+struct rx_ppdu_end_qca988x {
         __le16 bb_length;
         __le16 info1; /* %RX_PPDU_END_INFO1_ */
 } __packed;
 
+#define RX_PPDU_END_RTT_CORRELATION_VALUE_MASK 0x00ffffff
+#define RX_PPDU_END_RTT_CORRELATION_VALUE_LSB  0
+#define RX_PPDU_END_RTT_UNUSED_MASK            0x7f000000
+#define RX_PPDU_END_RTT_UNUSED_LSB             24
+#define RX_PPDU_END_RTT_NORMAL_MODE            BIT(31)
+
+struct rx_ppdu_end_qca6174 {
+        __le32 rtt; /* %RX_PPDU_END_RTT_ */
+        __le16 bb_length;
+        __le16 info1; /* %RX_PPDU_END_INFO1_ */
+} __packed;
+
+struct rx_ppdu_end {
+        struct rx_ppdu_end_common common;
+        union {
+                struct rx_ppdu_end_qca988x qca988x;
+                struct rx_ppdu_end_qca6174 qca6174;
+        } __packed;
+} __packed;
+
 /*
  * evm_p0
  *              EVM for pilot 0.  Contain EVM for streams: 0, 1, 2 and 3.