Merge branch 'x86-irq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[cascardo/linux.git] / drivers / net / ethernet / sfc / tx.c

diff --git a/drivers/net/ethernet/sfc/tx.c b/drivers/net/ethernet/sfc/tx.c
index fa94753..ede8dcc 100644 (file)
--- 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,