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linux-sg2042
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nvme: introduce max_integrity_segments ctrl attribute 

This patch doesn't change any logic, and is needed as a preparation
for adding PI support for fabrics drivers that will use an extended
LBA format for metadata and will support more than 1 integrity segment.

Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Max Gurtovoy 2020-05-19 17:05:52 +03:00 committed by Christoph Hellwig
parent 4d2ce68835
commit 9509335039
3 changed files with 14 additions and 4 deletions
drivers/nvme/host
core.cnvme.hpci.c

11
drivers/nvme/host/core.c
View File

@ -1693,7 +1693,8 @@ static int nvme_getgeo(struct block_device *bdev, struct hd_geometry *geo)
}
#ifdef CONFIG_BLK_DEV_INTEGRITY
static void nvme_init_integrity(struct gendisk *disk, u16 ms, u8 pi_type)
static void nvme_init_integrity(struct gendisk *disk, u16 ms, u8 pi_type,
u32 max_integrity_segments)
{
struct blk_integrity integrity;
@ -1716,10 +1717,11 @@ static void nvme_init_integrity(struct gendisk *disk, u16 ms, u8 pi_type)
}
integrity.tuple_size = ms;
blk_integrity_register(disk, &integrity);
blk_queue_max_integrity_segments(disk->queue, 1);
blk_queue_max_integrity_segments(disk->queue, max_integrity_segments);
}
#else
static void nvme_init_integrity(struct gendisk *disk, u16 ms, u8 pi_type)
static void nvme_init_integrity(struct gendisk *disk, u16 ms, u8 pi_type,
u32 max_integrity_segments)
{
}
#endif /* CONFIG_BLK_DEV_INTEGRITY */
@ -1895,7 +1897,8 @@ static void nvme_update_disk_info(struct gendisk *disk,
if (ns->ms) {
if (IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY) &&
(ns->features & NVME_NS_METADATA_SUPPORTED))
nvme_init_integrity(disk, ns->ms, ns->pi_type);
nvme_init_integrity(disk, ns->ms, ns->pi_type,
ns->ctrl->max_integrity_segments);
else if (!nvme_ns_has_pi(ns))
capacity = 0;
}

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

@ -229,6 +229,7 @@ struct nvme_ctrl {
u32 page_size;
u32 max_hw_sectors;
u32 max_segments;
u32 max_integrity_segments;
u16 crdt[3];
u16 oncs;
u16 oacs;

6
drivers/nvme/host/pci.c
View File

@ -2565,6 +2565,12 @@ static void nvme_reset_work(struct work_struct *work)
goto out;
}
/*
* We do not support an SGL for metadata (yet), so we are limited to a
* single integrity segment for the separate metadata pointer.
*/
dev->ctrl.max_integrity_segments = 1;
result = nvme_init_identify(&dev->ctrl);
if (result)
goto out;