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authorMax Gurtovoy <maxg@mellanox.com>2020-05-19 17:05:52 +0300
committerChristoph Hellwig <hch@lst.de>2020-05-27 08:12:39 +0300
commit95093350394a394e7c4e778176194b14b76ec5d8 (patch)
treed4072939afa81fcab8d4a07435bdc0905cd2af8c /drivers/nvme
parent4d2ce68835649afebbc5e8816b79426fb04c639f (diff)
downloadlinux-95093350394a394e7c4e778176194b14b76ec5d8.tar.xz
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>
Diffstat (limited to 'drivers/nvme')
-rw-r--r--drivers/nvme/host/core.c11
-rw-r--r--drivers/nvme/host/nvme.h1
-rw-r--r--drivers/nvme/host/pci.c6
3 files changed, 14 insertions, 4 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index beea013f7b73..404edceb84cb 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -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;
}
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index c83ff69338d8..5b5ed128fd9e 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -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;
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 6cc4630ddd6d..b307c06a783d 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -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;