From: Jesper Dangaard Brouer <brouer@redhat.com>
Date: Wed, 3 Jan 2018 11:25:29 +0100
Subject: ixgbe: setup xdp_rxq_info
Patch-mainline: v4.16-rc1
Git-commit: 99ffc5ade4e8703c3bc56fa6bb8e25437da09ee9
References: bsc#1113994 FATE#326315 FATE#326317

Driver hook points for xdp_rxq_info:
 * reg  : ixgbe_setup_rx_resources()
 * unreg: ixgbe_free_rx_resources()

Tested on actual hardware.

V2: Fix ixgbe_set_ringparam, clear xdp_rxq_info in temp_ring

Cc: intel-wired-lan@lists.osuosl.org
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Cc: Alexander Duyck <alexander.duyck@gmail.com>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe.h         |    2 ++
 drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c |    4 ++++
 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c    |   10 +++++++++-
 3 files changed, 15 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/intel/ixgbe/ixgbe.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
@@ -53,6 +53,7 @@
 #include <linux/dca.h>
 #endif
 
+#include <net/xdp.h>
 #include <net/busy_poll.h>
 
 /* common prefix used by pr_<> macros */
@@ -371,6 +372,7 @@ struct ixgbe_ring {
 		struct ixgbe_tx_queue_stats tx_stats;
 		struct ixgbe_rx_queue_stats rx_stats;
 	};
+	struct xdp_rxq_info xdp_rxq;
 } ____cacheline_internodealigned_in_smp;
 
 enum ixgbe_ring_f_enum {
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
@@ -1156,6 +1156,10 @@ static int ixgbe_set_ringparam(struct ne
 			memcpy(&temp_ring[i], adapter->rx_ring[i],
 			       sizeof(struct ixgbe_ring));
 
+			/* Clear copied XDP RX-queue info */
+			memset(&temp_ring[i].xdp_rxq, 0,
+			       sizeof(temp_ring[i].xdp_rxq));
+
 			temp_ring[i].count = new_rx_count;
 			err = ixgbe_setup_rx_resources(adapter, &temp_ring[i]);
 			if (err) {
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -2318,12 +2318,14 @@ static int ixgbe_clean_rx_irq(struct ixg
 #endif /* IXGBE_FCOE */
 	u16 cleaned_count = ixgbe_desc_unused(rx_ring);
 	bool xdp_xmit = false;
+	struct xdp_buff xdp;
+
+	xdp.rxq = &rx_ring->xdp_rxq;
 
 	while (likely(total_rx_packets < budget)) {
 		union ixgbe_adv_rx_desc *rx_desc;
 		struct ixgbe_rx_buffer *rx_buffer;
 		struct sk_buff *skb;
-		struct xdp_buff xdp;
 		unsigned int size;
 
 		/* return some buffers to hardware, one at a time is too slow */
@@ -6444,6 +6446,11 @@ int ixgbe_setup_rx_resources(struct ixgb
 	rx_ring->next_to_clean = 0;
 	rx_ring->next_to_use = 0;
 
+	/* XDP RX-queue info */
+	if (xdp_rxq_info_reg(&rx_ring->xdp_rxq, adapter->netdev,
+			     rx_ring->queue_index) < 0)
+		goto err;
+
 	rx_ring->xdp_prog = adapter->xdp_prog;
 
 	return 0;
@@ -6541,6 +6548,7 @@ void ixgbe_free_rx_resources(struct ixgb
 	ixgbe_clean_rx_ring(rx_ring);
 
 	rx_ring->xdp_prog = NULL;
+	xdp_rxq_info_unreg(&rx_ring->xdp_rxq);
 	vfree(rx_ring->rx_buffer_info);
 	rx_ring->rx_buffer_info = NULL;