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6f377873cb
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>
20 lines
624 B
Makefile
20 lines
624 B
Makefile
# SPDX-License-Identifier: GPL-2.0
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#
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# Makefile for io_uring
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ifdef CONFIG_GCOV_PROFILE_URING
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GCOV_PROFILE := y
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endif
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obj-$(CONFIG_IO_URING) += io_uring.o opdef.o kbuf.o rsrc.o notif.o \
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tctx.o filetable.o rw.o net.o poll.o \
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eventfd.o uring_cmd.o openclose.o \
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sqpoll.o xattr.o nop.o fs.o splice.o \
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sync.o msg_ring.o advise.o openclose.o \
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epoll.o statx.o timeout.o fdinfo.o \
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cancel.o waitid.o register.o \
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truncate.o memmap.o alloc_cache.o
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obj-$(CONFIG_IO_URING_ZCRX) += zcrx.o
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obj-$(CONFIG_IO_WQ) += io-wq.o
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obj-$(CONFIG_FUTEX) += futex.o
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obj-$(CONFIG_NET_RX_BUSY_POLL) += napi.o
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