wil6210: add HW write-back option in TX descriptor

Map BIT 9 in TX DMA DWARD 0 as HW write back option.
We must turn on this option in the last TX descriptor,
this is required for old HW compatability.
This option indicate to HW that WB is required for this descriptor.

Signed-off-by: Kirshenbaum Erez <erezk@wilocity.com>
Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/wil6210/txrx.c b/drivers/net/wireless/ath/wil6210/txrx.c
index 73d6c2dd08a46d4302b40d0d8b1855dc3df39f55..d240b24e1ccfafdd7d809c4b45951cbe2747a31a 100644 (file)
--- a/drivers/net/wireless/ath/wil6210/txrx.c
+++ b/drivers/net/wireless/ath/wil6210/txrx.c
@@ -708,7 +708,7 @@ static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring,
        }
        /* for the last seg only */
        d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS);
-       d->dma.d0 |= BIT(9); /* BUG: undocumented bit */
+       d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS);
        d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS);
        *_d = *d;
 

diff --git a/drivers/net/wireless/ath/wil6210/txrx.h b/drivers/net/wireless/ath/wil6210/txrx.h
index 23c0781cdb93f0dec4d2212e186a08e69d02e809..859aea68a1faa72169f3578a43bd4b1abb607dce 100644 (file)
--- a/drivers/net/wireless/ath/wil6210/txrx.h
+++ b/drivers/net/wireless/ath/wil6210/txrx.h
@@ -201,6 +201,10 @@ struct vring_tx_mac {
 #define DMA_CFG_DESC_TX_0_CMD_EOP_LEN 1
 #define DMA_CFG_DESC_TX_0_CMD_EOP_MSK 0x100
 
+#define DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS 9
+#define DMA_CFG_DESC_TX_0_CMD_MARK_WB_LEN 1
+#define DMA_CFG_DESC_TX_0_CMD_MARK_WB_MSK 0x200
+
 #define DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS 10
 #define DMA_CFG_DESC_TX_0_CMD_DMA_IT_LEN 1
 #define DMA_CFG_DESC_TX_0_CMD_DMA_IT_MSK 0x400