From: Max Gurtovoy <maxg@mellanox.com>
To: linux-nvme@lists.infradead.org, kbusch@kernel.org, hch@lst.de,
sagi@grimberg.me, martin.petersen@oracle.com
Cc: axboe@kernel.dk, vladimirk@mellanox.com, shlomin@mellanox.com,
israelr@mellanox.com, idanb@mellanox.com, oren@mellanox.com,
maxg@mellanox.com
Subject: [PATCH 01/16] nvme: Introduce namespace features flag
Date: Mon, 2 Dec 2019 16:47:57 +0200 [thread overview]
Message-ID: <20191202144812.147686-3-maxg@mellanox.com> (raw)
In-Reply-To: <20191202144812.147686-1-maxg@mellanox.com>
From: Israel Rukshin <israelr@mellanox.com>
This patch is a preparation for adding PI support for fabrics drivers
that will use an extended LBA format for metadata.
Suggested-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Israel Rukshin <israelr@mellanox.com>
---
drivers/nvme/host/core.c | 40 +++++++++++++++++++++++++++-------------
drivers/nvme/host/nvme.h | 6 +++++-
2 files changed, 32 insertions(+), 14 deletions(-)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index e6ee34376c5e..2e027627ab58 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -209,11 +209,6 @@ static int nvme_delete_ctrl_sync(struct nvme_ctrl *ctrl)
return ret;
}
-static inline bool nvme_ns_has_pi(struct nvme_ns *ns)
-{
- return ns->pi_type && ns->ms == sizeof(struct t10_pi_tuple);
-}
-
static blk_status_t nvme_error_status(u16 status)
{
switch (status & 0x7ff) {
@@ -473,6 +468,7 @@ static inline void nvme_clear_nvme_request(struct request *req)
if (!(req->rq_flags & RQF_DONTPREP)) {
nvme_req(req)->retries = 0;
nvme_req(req)->flags = 0;
+ nvme_req(req)->has_pi = false;
req->rq_flags |= RQF_DONTPREP;
}
}
@@ -706,6 +702,7 @@ static inline blk_status_t nvme_setup_rw(struct nvme_ns *ns,
nvme_assign_write_stream(ctrl, req, &control, &dsmgmt);
if (ns->ms) {
+ nvme_req(req)->has_pi = ns->features & NVME_NS_DIF_SUPPORTED;
/*
* If formated with metadata, the block layer always provides a
* metadata buffer if CONFIG_BLK_DEV_INTEGRITY is enabled. Else
@@ -713,7 +710,7 @@ static inline blk_status_t nvme_setup_rw(struct nvme_ns *ns,
* namespace capacity to zero to prevent any I/O.
*/
if (!blk_integrity_rq(req)) {
- if (WARN_ON_ONCE(!nvme_ns_has_pi(ns)))
+ if (WARN_ON_ONCE(!nvme_req(req)->has_pi))
return BLK_STS_NOTSUPP;
control |= NVME_RW_PRINFO_PRACT;
}
@@ -1271,7 +1268,7 @@ static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio)
meta_len = (io.nblocks + 1) * ns->ms;
metadata = (void __user *)(uintptr_t)io.metadata;
- if (ns->ext) {
+ if (ns->features & NVME_NS_EXT_LBAS) {
length += meta_len;
meta_len = 0;
} else if (meta_len) {
@@ -1799,10 +1796,10 @@ static void nvme_update_disk_info(struct gendisk *disk,
blk_queue_io_min(disk->queue, phys_bs);
blk_queue_io_opt(disk->queue, io_opt);
- if (ns->ms && !ns->ext &&
- (ns->ctrl->ops->flags & NVME_F_METADATA_SUPPORTED))
+ if (ns->features & NVME_NS_DIX_SUPPORTED)
nvme_init_integrity(disk, ns->ms, ns->pi_type);
- if ((ns->ms && !nvme_ns_has_pi(ns) && !blk_get_integrity(disk)) ||
+ if ((ns->ms && !(ns->features & NVME_NS_DIF_SUPPORTED) &&
+ !blk_get_integrity(disk)) ||
ns->lba_shift > PAGE_SHIFT)
capacity = 0;
@@ -1832,12 +1829,29 @@ static void __nvme_revalidate_disk(struct gendisk *disk, struct nvme_id_ns *id)
ns->lba_shift = 9;
ns->noiob = le16_to_cpu(id->noiob);
ns->ms = le16_to_cpu(id->lbaf[id->flbas & NVME_NS_FLBAS_LBA_MASK].ms);
- ns->ext = ns->ms && (id->flbas & NVME_NS_FLBAS_META_EXT);
+ ns->features = 0;
/* the PI implementation requires metadata equal t10 pi tuple size */
- if (ns->ms == sizeof(struct t10_pi_tuple))
+ if (ns->ms == sizeof(struct t10_pi_tuple)) {
ns->pi_type = id->dps & NVME_NS_DPS_PI_MASK;
- else
+ if (ns->pi_type)
+ ns->features |= NVME_NS_DIF_SUPPORTED;
+ } else {
ns->pi_type = 0;
+ }
+
+ if (ns->ms) {
+ if (id->flbas & NVME_NS_FLBAS_META_EXT)
+ ns->features |= NVME_NS_EXT_LBAS;
+
+ /*
+ * For PCI, Extended logical block will be generated by the
+ * controller.
+ */
+ if (ns->ctrl->ops->flags & NVME_F_METADATA_SUPPORTED) {
+ if (!(ns->features & NVME_NS_EXT_LBAS))
+ ns->features |= NVME_NS_DIX_SUPPORTED;
+ }
+ }
if (ns->noiob)
nvme_set_chunk_size(ns);
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 1024fec7914c..72473902f364 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -139,6 +139,7 @@ struct nvme_request {
u8 flags;
u16 status;
struct nvme_ctrl *ctrl;
+ bool has_pi;
};
/*
@@ -381,8 +382,11 @@ struct nvme_ns {
u16 ms;
u16 sgs;
u32 sws;
- bool ext;
u8 pi_type;
+ unsigned long features;
+#define NVME_NS_EXT_LBAS (1 << 0)
+#define NVME_NS_DIX_SUPPORTED (1 << 1)
+#define NVME_NS_DIF_SUPPORTED (1 << 2)
unsigned long flags;
#define NVME_NS_REMOVING 0
#define NVME_NS_DEAD 1
--
2.16.3
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next prev parent reply other threads:[~2019-12-02 14:51 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-02 14:47 [PATCH 00/16 V2] nvme-rdma/nvmet-rdma: Add metadata/T10-PI support Max Gurtovoy
2019-12-02 14:47 ` [PATCH] nvme-cli/fabrics: Add pi_enable param to connect cmd Max Gurtovoy
2019-12-02 14:47 ` Max Gurtovoy [this message]
2019-12-04 8:41 ` [PATCH 01/16] nvme: Introduce namespace features flag Christoph Hellwig
2019-12-02 14:47 ` [PATCH 02/16] nvme: Enforce extended LBA format for fabrics metadata Max Gurtovoy
2019-12-02 14:47 ` [PATCH 03/16] nvme: Introduce max_integrity_segments ctrl attribute Max Gurtovoy
2019-12-02 14:48 ` [PATCH 04/16] nvme-fabrics: Allow user enabling metadata/T10-PI support Max Gurtovoy
2019-12-02 14:48 ` [PATCH 05/16] nvme: Introduce NVME_INLINE_PROT_SG_CNT Max Gurtovoy
2019-12-02 14:48 ` [PATCH 06/16] nvme-rdma: Introduce nvme_rdma_sgl structure Max Gurtovoy
2019-12-02 14:48 ` [PATCH 07/16] nvme-rdma: Add metadata/T10-PI support Max Gurtovoy
2020-01-22 21:57 ` James Smart
2020-01-23 9:59 ` Max Gurtovoy
2020-01-23 15:34 ` James Smart
2020-01-23 18:52 ` James Smart
2019-12-02 14:48 ` [PATCH 08/16] block: Add a BIP_MAPPED_INTEGRITY check to complete_fn Max Gurtovoy
2019-12-02 14:48 ` [PATCH 09/16] nvmet: Prepare metadata request Max Gurtovoy
2019-12-02 14:48 ` [PATCH 10/16] nvmet: Add metadata characteristics for a namespace Max Gurtovoy
2019-12-02 14:48 ` [PATCH 11/16] nvmet: Rename nvmet_rw_len to nvmet_rw_data_len Max Gurtovoy
2019-12-02 14:48 ` [PATCH 12/16] nvmet: Rename nvmet_check_data_len to nvmet_check_transfer_len Max Gurtovoy
2019-12-02 14:48 ` [PATCH 13/16] nvme: Add Metadata Capabilities enumerations Max Gurtovoy
2019-12-02 14:48 ` [PATCH 14/16] nvmet: Add metadata/T10-PI support Max Gurtovoy
2019-12-02 14:48 ` [PATCH 15/16] nvmet: Add metadata support for block devices Max Gurtovoy
2019-12-02 14:48 ` [PATCH 16/16] nvmet-rdma: Add metadata/T10-PI support Max Gurtovoy
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