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nvme: use fdp streams if write stream is provided

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Maps a user requested write stream to an FDP placement ID if possible.

Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Nitesh Shetty <nj.shetty@samsung.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Kanchan Joshi <joshi.k@samsung.com>
Link: https://lore.kernel.org/r/20250506121732.8211-12-joshi.k@samsung.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Keith Busch 2025-05-06 17:47:32 +05:30 committed by Jens Axboe
parent 30b5f20bb2
commit 38e8397dde
2 changed files with 31 additions and 1 deletions
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31
drivers/nvme/host/core.c
View File

@ -672,6 +672,7 @@ static void nvme_free_ns_head(struct kref *ref)
ida_free(&head->subsys->ns_ida, head->instance);
cleanup_srcu_struct(&head->srcu);
nvme_put_subsystem(head->subsys);
kfree(head->plids);
kfree(head);
}
@ -995,6 +996,18 @@ static inline blk_status_t nvme_setup_rw(struct nvme_ns *ns,
if (req->cmd_flags & REQ_RAHEAD)
dsmgmt |= NVME_RW_DSM_FREQ_PREFETCH;
if (op == nvme_cmd_write && ns->head->nr_plids) {
u16 write_stream = req->bio->bi_write_stream;
if (WARN_ON_ONCE(write_stream > ns->head->nr_plids))
return BLK_STS_INVAL;
if (write_stream) {
dsmgmt |= ns->head->plids[write_stream - 1] << 16;
control |= NVME_RW_DTYPE_DPLCMT;
}
}
if (req->cmd_flags & REQ_ATOMIC && !nvme_valid_atomic_write(req))
return BLK_STS_INVAL;
@ -2240,7 +2253,7 @@ static int nvme_query_fdp_info(struct nvme_ns *ns, struct nvme_ns_info *info)
struct nvme_fdp_config fdp;
struct nvme_command c = {};
size_t size;
int ret;
int i, ret;
/*
* The FDP configuration is static for the lifetime of the namespace,
@ -2280,6 +2293,22 @@ static int nvme_query_fdp_info(struct nvme_ns *ns, struct nvme_ns_info *info)
}
head->nr_plids = le16_to_cpu(ruhs->nruhsd);
if (!head->nr_plids)
goto free;
head->plids = kcalloc(head->nr_plids, sizeof(head->plids),
GFP_KERNEL);
if (!head->plids) {
dev_warn(ctrl->device,
"failed to allocate %u FDP placement IDs\n",
head->nr_plids);
head->nr_plids = 0;
ret = -ENOMEM;
goto free;
}
for (i = 0; i < head->nr_plids; i++)
head->plids[i] = le16_to_cpu(ruhs->ruhsd[i].pid);
free:
kfree(ruhs);
return ret;

1
drivers/nvme/host/nvme.h
View File

@ -498,6 +498,7 @@ struct nvme_ns_head {
struct gendisk *disk;
u16 nr_plids;
u16 *plids;
#ifdef CONFIG_NVME_MULTIPATH
struct bio_list requeue_list;
spinlock_t requeue_lock;