nvme: wire up fixed buffer support for nvme passthrough

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if io_uring sends passthrough command with IORING_URING_CMD_FIXED flag,
use the pre-registered buffer for IO (non-vectored variant). Pass the
buffer/length to io_uring and get the bvec iterator for the range. Next,
pass this bvec to block-layer and obtain a bio/request for subsequent
processing.

Signed-off-by: Kanchan Joshi <joshi.k@samsung.com>
Link: https://lore.kernel.org/r/20220930062749.152261-13-anuj20.g@samsung.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Kanchan Joshi 2022-09-30 11:57:49 +05:30 • committed by Jens Axboe

parent 4d17448682

commit 23fd22e55b

1 changed files with 16 additions and 2 deletions

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18

drivers/nvme/host/ioctl.c

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