sfc: Fix DMA unmapping issue with firmware assisted TSO

[firefly-linux-kernel-4.4.55.git] / drivers / net / ethernet / sfc / net_driver.h

diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h
index aac22a1e85b8e081f5c83723721c637161ba1e46..b14a717ac3e8d95099b5d2648be590e138bc9e61 100644 (file)
--- a/drivers/net/ethernet/sfc/net_driver.h
+++ b/drivers/net/ethernet/sfc/net_driver.h
@@ -141,6 +141,8 @@ struct efx_special_buffer {
  * @len: Length of this fragment.
  *     This field is zero when the queue slot is empty.
  * @unmap_len: Length of this fragment to unmap
+ * @dma_offset: Offset of @dma_addr from the address of the backing DMA mapping.
+ * Only valid if @unmap_len != 0.
  */
 struct efx_tx_buffer {
        union {
@@ -154,6 +156,7 @@ struct efx_tx_buffer {
        unsigned short flags;
        unsigned short len;
        unsigned short unmap_len;
+       unsigned short dma_offset;
 };
 #define EFX_TX_BUF_CONT                1       /* not last descriptor of packet */
 #define EFX_TX_BUF_SKB         2       /* buffer is last part of skb */