[PATCH net-next V2 07/13] net/mlx5e: SHAMPO, Use page_pool DMA sync helper for SKB frags

[Tariq Toukan <tariqt@nvidia.com>]

From: Dragos Tatulea <dtatulea@nvidia.com>

Switch to the page_pool DMA API which takes care of not calling
dma_sync_* for unreadable netmem. Do it only for the place where it
makes sense: SHAMPO payloads, the only RX buffers that can be
unreadable.

Until now it was ok to call the dma_sync_* API directly. But with the
introduction of data direct it will no longer be correct: the payload
netmem of a data direct RQ is mapped against the data direct device,
not rq->pdev.

Signed-off-by: Dragos Tatulea <dtatulea@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_rx.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
index 0f9a946aef41..9db3db5246ab 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
@@ -560,12 +560,11 @@ mlx5e_add_skb_frag(struct mlx5e_rq *rq, struct sk_buff *skb,
 		   u32 frag_offset, u32 len,
 		   unsigned int truesize)
 {
-	dma_addr_t addr = page_pool_get_dma_addr_netmem(frag_page->netmem);
 	u8 next_frag = skb_shinfo(skb)->nr_frags;
 	netmem_ref netmem = frag_page->netmem;
 
-	dma_sync_single_for_cpu(rq->pdev, addr + frag_offset, len,
-				rq->buff.map_dir);
+	page_pool_dma_sync_netmem_for_cpu(rq->page_pool, netmem, frag_offset,
+					  len);
 
 	if (skb_can_coalesce_netmem(skb, next_frag, netmem, frag_offset)) {
 		skb_coalesce_rx_frag(skb, next_frag - 1, len, truesize);
-- 
2.44.0