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io_uring/zcrx: let zcrx choose region for mmaping

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In preparation for adding multiple ifqs, add a helper returning a region
for mmaping zcrx refill queue. For now it's trivial and returns the same
ctx global ->zcrx_region.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/d9006e2ef8cd5e5b337c2ba2228ede8409eb60f2.1745141261.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov
2025-04-20 10:31:18 +01:00
committed by Jens Axboe
parent 59bc1ab922
commit 77231d4e46
4 changed files with 26 additions and 4 deletions
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11
io_uring/memmap.c
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@@ -13,6 +13,7 @@
#include "memmap.h"
#include "kbuf.h"
#include "rsrc.h"
#include "zcrx.h"
static void *io_mem_alloc_compound(struct page **pages, int nr_pages,
size_t size, gfp_t gfp)
@@ -258,7 +259,8 @@ static struct io_mapped_region *io_mmap_get_region(struct io_ring_ctx *ctx,
loff_t pgoff)
{
loff_t offset = pgoff << PAGE_SHIFT;
unsigned int bgid;
unsigned int id;
switch (offset & IORING_OFF_MMAP_MASK) {
case IORING_OFF_SQ_RING:
@@ -267,12 +269,13 @@ static struct io_mapped_region *io_mmap_get_region(struct io_ring_ctx *ctx,
case IORING_OFF_SQES:
return &ctx->sq_region;
case IORING_OFF_PBUF_RING:
bgid = (offset & ~IORING_OFF_MMAP_MASK) >> IORING_OFF_PBUF_SHIFT;
return io_pbuf_get_region(ctx, bgid);
id = (offset & ~IORING_OFF_MMAP_MASK) >> IORING_OFF_PBUF_SHIFT;
return io_pbuf_get_region(ctx, id);
case IORING_MAP_OFF_PARAM_REGION:
return &ctx->param_region;
case IORING_MAP_OFF_ZCRX_REGION:
return &ctx->zcrx_region;
id = (offset & ~IORING_OFF_MMAP_MASK) >> IORING_OFF_ZCRX_SHIFT;
return io_zcrx_get_region(ctx, id);
}
return NULL;
}