ixgbe, xsk: Migrate to new MEM_TYPE_XSK_BUFF_POOL

Remove MEM_TYPE_ZERO_COPY in favor of the new MEM_TYPE_XSK_BUFF_POOL
APIs.

v1->v2: Fixed xdp_buff data_end update. (Björn)
Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Cc: intel-wired-lan@lists.osuosl.org
Link: https://lore.kernel.org/bpf/20200520192103.355233-11-bjorn.topel@gmail.com

drivers/net/ethernet/intel/ixgbe/ixgbe.h

@@ -224,17 +224,17 @@ struct ixgbe_tx_buffer {
 };
 
 struct ixgbe_rx_buffer {
-	struct sk_buff *skb;
-	dma_addr_t dma;
 	union {
 		struct {
+			struct sk_buff *skb;
+			dma_addr_t dma;
 			struct page *page;
 			__u32 page_offset;
 			__u16 pagecnt_bias;
 		};
 		struct {
-			void *addr;
-			u64 handle;
+			bool discard;
+			struct xdp_buff *xdp;
 		};
 	};
 };
@@ -351,7 +351,6 @@ struct ixgbe_ring {
 	};
 	struct xdp_rxq_info xdp_rxq;
 	struct xdp_umem *xsk_umem;
-	struct zero_copy_allocator zca; /* ZC allocator anchor */
 	u16 ring_idx;		/* {rx,tx,xdp}_ring back reference idx */
 	u16 rx_buf_len;
 } ____cacheline_internodealigned_in_smp;

drivers/net/ethernet/intel/ixgbe/ixgbe_main.c

@@ -35,7 +35,7 @@
 #include <net/tc_act/tc_mirred.h>
 #include <net/vxlan.h>
 #include <net/mpls.h>
-#include <net/xdp_sock.h>
+#include <net/xdp_sock_drv.h>
 #include <net/xfrm.h>
 
 #include "ixgbe.h"
@@ -3745,8 +3745,7 @@ static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter,
 
 	/* configure the packet buffer length */
 	if (rx_ring->xsk_umem) {
-		u32 xsk_buf_len = rx_ring->xsk_umem->chunk_size_nohr -
-				  XDP_PACKET_HEADROOM;
+		u32 xsk_buf_len = xsk_umem_get_rx_frame_size(rx_ring->xsk_umem);
 
 		/* If the MAC support setting RXDCTL.RLPML, the
 		 * SRRCTL[n].BSIZEPKT is set to PAGE_SIZE and
@@ -4093,11 +4092,10 @@ void ixgbe_configure_rx_ring(struct ixgbe_adapter *adapter,
 	xdp_rxq_info_unreg_mem_model(&ring->xdp_rxq);
 	ring->xsk_umem = ixgbe_xsk_umem(adapter, ring);
 	if (ring->xsk_umem) {
-		ring->zca.free = ixgbe_zca_free;
 		WARN_ON(xdp_rxq_info_reg_mem_model(&ring->xdp_rxq,
-						   MEM_TYPE_ZERO_COPY,
-						   &ring->zca));
-
+						   MEM_TYPE_XSK_BUFF_POOL,
+						   NULL));
+		xsk_buff_set_rxq_info(ring->xsk_umem, &ring->xdp_rxq);
 	} else {
 		WARN_ON(xdp_rxq_info_reg_mem_model(&ring->xdp_rxq,
 						   MEM_TYPE_PAGE_SHARED, NULL));
@@ -4153,8 +4151,7 @@ void ixgbe_configure_rx_ring(struct ixgbe_adapter *adapter,
 	}
 
 	if (ring->xsk_umem && hw->mac.type != ixgbe_mac_82599EB) {
-		u32 xsk_buf_len = ring->xsk_umem->chunk_size_nohr -
-				  XDP_PACKET_HEADROOM;
+		u32 xsk_buf_len = xsk_umem_get_rx_frame_size(ring->xsk_umem);
 
 		rxdctl &= ~(IXGBE_RXDCTL_RLPMLMASK |
 			    IXGBE_RXDCTL_RLPML_EN);

drivers/net/ethernet/intel/ixgbe/ixgbe_txrx_common.h

@@ -35,7 +35,7 @@ int ixgbe_xsk_umem_setup(struct ixgbe_adapter *adapter, struct xdp_umem *umem,
 
 void ixgbe_zca_free(struct zero_copy_allocator *alloc, unsigned long handle);
 
-void ixgbe_alloc_rx_buffers_zc(struct ixgbe_ring *rx_ring, u16 cleaned_count);
+bool ixgbe_alloc_rx_buffers_zc(struct ixgbe_ring *rx_ring, u16 cleaned_count);
 int ixgbe_clean_rx_irq_zc(struct ixgbe_q_vector *q_vector,
 			  struct ixgbe_ring *rx_ring,
 			  const int budget);