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From: Max Gurtovoy <maxg@mellanox.com>
To: linux-nvme@lists.infradead.org, sagi@grimberg.me,
	linux-rdma@vger.kernel.org, kbusch@kernel.org, hch@lst.de,
	martin.petersen@oracle.com
Cc: axboe@kernel.dk, vladimirk@mellanox.com, shlomin@mellanox.com,
	israelr@mellanox.com, idanb@mellanox.com, maxg@mellanox.com
Subject: [PATCH 04/19] nvme: Introduce max_integrity_segments ctrl attribute
Date: Mon, 24 Feb 2020 18:45:29 +0200
Message-ID: <20200224164544.219438-6-maxg@mellanox.com> (raw)
In-Reply-To: <20200224164544.219438-1-maxg@mellanox.com>

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.

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>
---
 drivers/nvme/host/core.c | 11 +++++++----
 drivers/nvme/host/nvme.h |  1 +
 drivers/nvme/host/pci.c  |  7 +++++++
 3 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 86e39f6..ab25128 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -1626,7 +1626,8 @@ 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;
 
@@ -1649,10 +1650,11 @@ 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 */
@@ -1806,7 +1808,8 @@ static void nvme_update_disk_info(struct gendisk *disk,
 	blk_queue_io_opt(disk->queue, io_opt);
 
 	if (ns->features & NVME_NS_MD_HOST_SUPPORTED)
-		nvme_init_integrity(disk, ns->ms, ns->pi_type);
+		nvme_init_integrity(disk, ns->ms, ns->pi_type,
+				    ns->ctrl->max_integrity_segments);
 	if ((ns->ms && !(ns->features & NVME_NS_MD_CTRL_SUPPORTED) &&
 	     !blk_get_integrity(disk)) ||
 	    ns->lba_shift > PAGE_SHIFT)
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 99340d7..af8e10a 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 da392b5..e4e95c9 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -2573,6 +2573,13 @@ static void nvme_reset_work(struct work_struct *work)
 		goto out;
 	}
 
+	/*
+	 * NVMe PCI driver doesn't support Extended LBA format and supports
+	 * only a single integrity segment for a separate contiguous buffer
+	 * of metadata.
+	 */
+	dev->ctrl.max_integrity_segments = 1;
+
 	result = nvme_init_identify(&dev->ctrl);
 	if (result)
 		goto out;
-- 
1.8.3.1


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  parent reply index

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-24 16:45 [PATCH 00/19 V4] nvme-rdma/nvmet-rdma: Add metadata/T10-PI support Max Gurtovoy
2020-02-24 16:45 ` [PATCH] nvme-cli/fabrics: Add pi_enable param to connect cmd Max Gurtovoy
2020-02-24 16:45 ` [PATCH 01/19] nvme: Introduce namespace features flag Max Gurtovoy
2020-02-24 16:45 ` [PATCH 02/19] nvme: Add has_pi field to the nvme_req structure Max Gurtovoy
2020-02-24 16:45 ` [PATCH 03/19] nvme: Enforce extended LBA format for fabrics metadata Max Gurtovoy
2020-02-24 16:45 ` Max Gurtovoy [this message]
2020-02-24 16:45 ` [PATCH 05/19] nvme-fabrics: Allow user enabling metadata/T10-PI support Max Gurtovoy
2020-02-24 16:45 ` [PATCH 06/19] nvme: Introduce NVME_INLINE_PROT_SG_CNT Max Gurtovoy
2020-02-24 16:45 ` [PATCH 07/19] nvme-rdma: Introduce nvme_rdma_sgl structure Max Gurtovoy
2020-02-24 16:45 ` [PATCH 08/19] nvme-rdma: Add metadata/T10-PI support Max Gurtovoy
2020-02-24 16:45 ` [PATCH 09/19] nvmet: Prepare metadata request Max Gurtovoy
2020-02-24 16:45 ` [PATCH 10/19] nvmet: Add metadata characteristics for a namespace Max Gurtovoy
2020-02-24 16:45 ` [PATCH 11/19] nvmet: Rename nvmet_rw_len to nvmet_rw_data_len Max Gurtovoy
2020-02-24 16:45 ` [PATCH 12/19] nvmet: Rename nvmet_check_data_len to nvmet_check_transfer_len Max Gurtovoy
2020-02-24 16:45 ` [PATCH 13/19] nvme: Add Metadata Capabilities enumerations Max Gurtovoy
2020-02-24 16:45 ` [PATCH 14/19] nvmet: Add mdts setting op for controllers Max Gurtovoy
2020-02-24 16:45 ` [PATCH 15/19] nvmet: Add metadata/T10-PI support Max Gurtovoy
2020-02-24 16:45 ` [PATCH 16/19] nvmet: Add metadata support for block devices Max Gurtovoy
2020-02-24 16:45 ` [PATCH 17/19] RDMA/rw: Expose maximal page list for a device per 1 MR Max Gurtovoy
2020-02-24 16:45 ` [PATCH 18/19] nvmet-rdma: Implement set_mdts controller op Max Gurtovoy
2020-02-24 16:45 ` [PATCH 19/19] nvmet-rdma: Add metadata/T10-PI support Max Gurtovoy
2020-02-24 18:13 ` [PATCH 00/19 V4] nvme-rdma/nvmet-rdma: " James Smart

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