xsk: i40e: ice: ixgbe: mlx5: Pass buffer pool to driver instead of umem

Replace the explicit umem reference passed to the driver in AF_XDP
zero-copy mode with the buffer pool instead. This in preparation for
extending the functionality of the zero-copy mode so that umems can be
shared between queues on the same netdev and also between netdevs. In
this commit, only an umem reference has been added to the buffer pool
struct. But later commits will add other entities to it. These are
going to be entities that are different between different queue ids
and netdevs even though the umem is shared between them.

Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Björn Töpel <bjorn.topel@intel.com>
Link: https://lore.kernel.org/bpf/1598603189-32145-2-git-send-email-magnus.karlsson@intel.com

1 files changed, 3 insertions, 1 deletions

diff --git a/include/net/xsk_buff_pool.h b/include/net/xsk_buff_pool.h
index 6842990e2712..f851b0a68324 100644
--- a/include/net/xsk_buff_pool.h
+++ b/include/net/xsk_buff_pool.h
@@ -13,6 +13,7 @@ struct xsk_buff_pool;
 struct xdp_rxq_info;
 struct xsk_queue;
 struct xdp_desc;
+struct xdp_umem;
 struct device;
 struct page;
 
@@ -42,13 +43,14 @@ struct xsk_buff_pool {
 	u32 frame_len;
 	bool dma_need_sync;
 	bool unaligned;
+	struct xdp_umem *umem;
 	void *addrs;
 	struct device *dev;
 	struct xdp_buff_xsk *free_heads[];
 };
 
 /* AF_XDP core. */
-struct xsk_buff_pool *xp_create(struct page **pages, u32 nr_pages, u32 chunks,
+struct xsk_buff_pool *xp_create(struct xdp_umem *umem, u32 chunks,
 				u32 chunk_size, u32 headroom, u64 size,
 				bool unaligned);
 void xp_set_fq(struct xsk_buff_pool *pool, struct xsk_queue *fq);