diff options
| author | David Wei <dw@davidwei.uk> | 2025-02-14 16:09:36 -0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2025-02-17 05:41:03 -0700 |
| commit | 6f377873cb23905009759b7366b9fe85c2a6ff37 (patch) | |
| tree | 174674c6e7cc5055cdf90ccdc99e7b3032c57483 /io_uring/io_uring.c | |
| parent | 5c496ff11df179c32db960cf10af90a624a035eb (diff) | |
io_uring/zcrx: add interface queue and refill queue
Add a new object called an interface queue (ifq) that represents a net
rx queue that has been configured for zero copy. Each ifq is registered
using a new registration opcode IORING_REGISTER_ZCRX_IFQ.
The refill queue is allocated by the kernel and mapped by userspace
using a new offset IORING_OFF_RQ_RING, in a similar fashion to the main
SQ/CQ. It is used by userspace to return buffers that it is done with,
which will then be re-used by the netdev again.
The main CQ ring is used to notify userspace of received data by using
the upper 16 bytes of a big CQE as a new struct io_uring_zcrx_cqe. Each
entry contains the offset + len to the data.
For now, each io_uring instance only has a single ifq.
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: David Wei <dw@davidwei.uk>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/r/20250215000947.789731-2-dw@davidwei.uk
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring/io_uring.c')
| -rw-r--r-- | io_uring/io_uring.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index b688953d1de8..58528bf61638 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -97,6 +97,7 @@ #include "uring_cmd.h" #include "msg_ring.h" #include "memmap.h" +#include "zcrx.h" #include "timeout.h" #include "poll.h" @@ -2700,6 +2701,7 @@ static __cold void io_ring_ctx_free(struct io_ring_ctx *ctx) mutex_lock(&ctx->uring_lock); io_sqe_buffers_unregister(ctx); io_sqe_files_unregister(ctx); + io_unregister_zcrx_ifqs(ctx); io_cqring_overflow_kill(ctx); io_eventfd_unregister(ctx); io_free_alloc_caches(ctx); @@ -2859,6 +2861,11 @@ static __cold void io_ring_exit_work(struct work_struct *work) io_cqring_overflow_kill(ctx); mutex_unlock(&ctx->uring_lock); } + if (ctx->ifq) { + mutex_lock(&ctx->uring_lock); + io_shutdown_zcrx_ifqs(ctx); + mutex_unlock(&ctx->uring_lock); + } if (ctx->flags & IORING_SETUP_DEFER_TASKRUN) io_move_task_work_from_local(ctx); |