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path: root/drivers/net/ethernet/sfc/tx.c
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Diffstat (limited to 'drivers/net/ethernet/sfc/tx.c')
-rw-r--r--drivers/net/ethernet/sfc/tx.c22
1 files changed, 17 insertions, 5 deletions
diff --git a/drivers/net/ethernet/sfc/tx.c b/drivers/net/ethernet/sfc/tx.c
index fa9475300411..ede8dcca0ff3 100644
--- a/drivers/net/ethernet/sfc/tx.c
+++ b/drivers/net/ethernet/sfc/tx.c
@@ -189,6 +189,18 @@ struct efx_short_copy_buffer {
u8 buf[L1_CACHE_BYTES];
};
+/* Copy in explicit 64-bit writes. */
+static void efx_memcpy_64(void __iomem *dest, void *src, size_t len)
+{
+ u64 *src64 = src;
+ u64 __iomem *dest64 = dest;
+ size_t l64 = len / 8;
+ size_t i;
+
+ for (i = 0; i < l64; i++)
+ writeq(src64[i], &dest64[i]);
+}
+
/* Copy to PIO, respecting that writes to PIO buffers must be dword aligned.
* Advances piobuf pointer. Leaves additional data in the copy buffer.
*/
@@ -198,7 +210,7 @@ static void efx_memcpy_toio_aligned(struct efx_nic *efx, u8 __iomem **piobuf,
{
int block_len = len & ~(sizeof(copy_buf->buf) - 1);
- memcpy_toio(*piobuf, data, block_len);
+ efx_memcpy_64(*piobuf, data, block_len);
*piobuf += block_len;
len -= block_len;
@@ -230,7 +242,7 @@ static void efx_memcpy_toio_aligned_cb(struct efx_nic *efx, u8 __iomem **piobuf,
if (copy_buf->used < sizeof(copy_buf->buf))
return;
- memcpy_toio(*piobuf, copy_buf->buf, sizeof(copy_buf->buf));
+ efx_memcpy_64(*piobuf, copy_buf->buf, sizeof(copy_buf->buf));
*piobuf += sizeof(copy_buf->buf);
data += copy_to_buf;
len -= copy_to_buf;
@@ -245,7 +257,7 @@ static void efx_flush_copy_buffer(struct efx_nic *efx, u8 __iomem *piobuf,
{
/* if there's anything in it, write the whole buffer, including junk */
if (copy_buf->used)
- memcpy_toio(piobuf, copy_buf->buf, sizeof(copy_buf->buf));
+ efx_memcpy_64(piobuf, copy_buf->buf, sizeof(copy_buf->buf));
}
/* Traverse skb structure and copy fragments in to PIO buffer.
@@ -304,8 +316,8 @@ efx_enqueue_skb_pio(struct efx_tx_queue *tx_queue, struct sk_buff *skb)
*/
BUILD_BUG_ON(L1_CACHE_BYTES >
SKB_DATA_ALIGN(sizeof(struct skb_shared_info)));
- memcpy_toio(tx_queue->piobuf, skb->data,
- ALIGN(skb->len, L1_CACHE_BYTES));
+ efx_memcpy_64(tx_queue->piobuf, skb->data,
+ ALIGN(skb->len, L1_CACHE_BYTES));
}
EFX_POPULATE_QWORD_5(buffer->option,