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git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - net/xdp/xsk_queue.c
1 // SPDX-License-Identifier: GPL-2.0
2 /* XDP user-space ring structure
3 * Copyright(c) 2018 Intel Corporation.
6 #include <linux/log2.h>
7 #include <linux/slab.h>
8 #include <linux/overflow.h>
9 #include <net/xdp_sock_drv.h>
11 #include "xsk_queue.h"
13 static size_t xskq_get_ring_size(struct xsk_queue
*q
, bool umem_queue
)
15 struct xdp_umem_ring
*umem_ring
;
16 struct xdp_rxtx_ring
*rxtx_ring
;
19 return struct_size(umem_ring
, desc
, q
->nentries
);
20 return struct_size(rxtx_ring
, desc
, q
->nentries
);
23 struct xsk_queue
*xskq_create(u32 nentries
, bool umem_queue
)
29 q
= kzalloc(sizeof(*q
), GFP_KERNEL
);
33 q
->nentries
= nentries
;
34 q
->ring_mask
= nentries
- 1;
36 gfp_flags
= GFP_KERNEL
| __GFP_ZERO
| __GFP_NOWARN
|
37 __GFP_COMP
| __GFP_NORETRY
;
38 size
= xskq_get_ring_size(q
, umem_queue
);
40 q
->ring
= (struct xdp_ring
*)__get_free_pages(gfp_flags
,
50 void xskq_destroy(struct xsk_queue
*q
)
55 page_frag_free(q
->ring
);