[SRU][B:linux-azure-4.15][PATCH 15/40] ixgbe: use xdp_return_frame API

[William Breathitt Gray]

From: Jesper Dangaard Brouer <brouer at redhat.com>

BugLink: https://bugs.launchpad.net/bugs/1877654

Extend struct ixgbe_tx_buffer to store the xdp_mem_info.

Notice that this could be optimized further by putting this into
a union in the struct ixgbe_tx_buffer, but this patchset
works towards removing this again.  Thus, this is not done.

Signed-off-by: Jesper Dangaard Brouer <brouer at redhat.com>
Signed-off-by: David S. Miller <davem at davemloft.net>
(cherry picked from commit 189ead81a83eba5f5c5ce56c45620e51abcb5cb8)
Signed-off-by: William Breathitt Gray <william.gray at canonical.com>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe.h      | 1 +
 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 6 ++++--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe.h b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
index 8611763d6129..94a77ef2bffd 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
@@ -247,6 +247,7 @@ struct ixgbe_tx_buffer {
 	DEFINE_DMA_UNMAP_ADDR(dma);
 	DEFINE_DMA_UNMAP_LEN(len);
 	u32 tx_flags;
+	struct xdp_mem_info xdp_mem;
 };
 
 struct ixgbe_rx_buffer {
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 49028d005eae..25ebb81ee1bb 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -1207,7 +1207,7 @@ static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
 
 		/* free the skb */
 		if (ring_is_xdp(tx_ring))
-			page_frag_free(tx_buffer->data);
+			xdp_return_frame(tx_buffer->data, &tx_buffer->xdp_mem);
 		else
 			napi_consume_skb(tx_buffer->skb, napi_budget);
 
@@ -5880,7 +5880,7 @@ static void ixgbe_clean_tx_ring(struct ixgbe_ring *tx_ring)
 
 		/* Free all the Tx ring sk_buffs */
 		if (ring_is_xdp(tx_ring))
-			page_frag_free(tx_buffer->data);
+			xdp_return_frame(tx_buffer->data, &tx_buffer->xdp_mem);
 		else
 			dev_kfree_skb_any(tx_buffer->skb);
 
@@ -8476,6 +8476,8 @@ static int ixgbe_xmit_xdp_ring(struct ixgbe_adapter *adapter,
 	dma_unmap_len_set(tx_buffer, len, len);
 	dma_unmap_addr_set(tx_buffer, dma, dma);
 	tx_buffer->data = xdp->data;
+	tx_buffer->xdp_mem = xdp->rxq->mem;
+
 	tx_desc->read.buffer_addr = cpu_to_le64(dma);
 
 	/* put descriptor type bits */
-- 
2.25.1