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| author | Maciej Fijalkowski <maciej.fijalkowski@intel.com> | 2023-07-19 16:24:08 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2023-07-19 19:56:49 +0300 |
| commit | 24ea50127ecf0efe819c1f6230add27abc6ca9d9 (patch) | |
| tree | ef1c4492c553100e68df539ec534eca8ac0f85c5 /include/net/xsk_buff_pool.h | |
| parent | 13ce2daa259a3bfbc9a5aeeee8b9a87058703731 (diff) | |
| download | linux-24ea50127ecf0efe819c1f6230add27abc6ca9d9.tar.xz | |
xsk: support mbuf on ZC RX
Given that skb_shared_info relies on skb_frag_t, in order to support
xskb chaining, introduce xdp_buff_xsk::xskb_list_node and
xsk_buff_pool::xskb_list.
This is needed so ZC drivers can add frags as xskb nodes which will make
it possible to handle it both when producing AF_XDP Rx descriptors as
well as freeing/recycling all the frags that a single frame carries.
Speaking of latter, update xsk_buff_free() to take care of list nodes.
For the former (adding as frags), introduce xsk_buff_add_frag() for ZC
drivers usage that is going to be used to add a frag to xskb list from
pool.
xsk_buff_get_frag() will be utilized by XDP_TX and, on contrary, will
return xdp_buff.
One of the previous patches added a wrapper for ZC Rx so implement xskb
list walk and production of Rx descriptors there.
On bind() path, bail out if socket wants to use ZC multi-buffer but
underlying netdev does not support it.
Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Link: https://lore.kernel.org/r/20230719132421.584801-12-maciej.fijalkowski@intel.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'include/net/xsk_buff_pool.h')
| -rw-r--r-- | include/net/xsk_buff_pool.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/net/xsk_buff_pool.h b/include/net/xsk_buff_pool.h index 4dcca163e076..b0bdff26fc88 100644 --- a/include/net/xsk_buff_pool.h +++ b/include/net/xsk_buff_pool.h @@ -29,6 +29,7 @@ struct xdp_buff_xsk { struct xsk_buff_pool *pool; u64 orig_addr; struct list_head free_list_node; + struct list_head xskb_list_node; }; #define XSK_CHECK_PRIV_TYPE(t) BUILD_BUG_ON(sizeof(t) > offsetofend(struct xdp_buff_xsk, cb)) @@ -54,6 +55,7 @@ struct xsk_buff_pool { struct xdp_umem *umem; struct work_struct work; struct list_head free_list; + struct list_head xskb_list; u32 heads_cnt; u16 queue_id; |