From: Damien Le Moal <damien.lemoal@wdc.com>
To: linux-nvme@lists.infradead.org, Christoph Hellwig <hch@lst.de>,
Keith Busch <kbusch@kernel.org>, Sagi Grimberg <sagi@grimberg.me>,
linux-block@vger.kernel.org, Jens Axboe <axboe@kernel.dk>
Subject: [PATCH 1/2 v2] nvme: Cleanup and rename nvme_block_nr()
Date: Mon, 21 Oct 2019 12:40:03 +0900 [thread overview]
Message-ID: <20191021034004.11063-2-damien.lemoal@wdc.com> (raw)
In-Reply-To: <20191021034004.11063-1-damien.lemoal@wdc.com>
Rename nvme_block_nr() to nvme_sect_to_lba() and use SECTOR_SHIFT
instead of its hard coded value 9. Also add a comment to decribe this
helper.
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
---
drivers/nvme/host/core.c | 6 +++---
drivers/nvme/host/nvme.h | 7 +++++--
2 files changed, 8 insertions(+), 5 deletions(-)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index fa7ba09dca77..6b37103b31d9 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -626,7 +626,7 @@ static blk_status_t nvme_setup_discard(struct nvme_ns *ns, struct request *req,
}
__rq_for_each_bio(bio, req) {
- u64 slba = nvme_block_nr(ns, bio->bi_iter.bi_sector);
+ u64 slba = nvme_sect_to_lba(ns, bio->bi_iter.bi_sector);
u32 nlb = bio->bi_iter.bi_size >> ns->lba_shift;
if (n < segments) {
@@ -667,7 +667,7 @@ static inline blk_status_t nvme_setup_write_zeroes(struct nvme_ns *ns,
cmnd->write_zeroes.opcode = nvme_cmd_write_zeroes;
cmnd->write_zeroes.nsid = cpu_to_le32(ns->head->ns_id);
cmnd->write_zeroes.slba =
- cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req)));
+ cpu_to_le64(nvme_sect_to_lba(ns, blk_rq_pos(req)));
cmnd->write_zeroes.length =
cpu_to_le16((blk_rq_bytes(req) >> ns->lba_shift) - 1);
cmnd->write_zeroes.control = 0;
@@ -691,7 +691,7 @@ static inline blk_status_t nvme_setup_rw(struct nvme_ns *ns,
cmnd->rw.opcode = (rq_data_dir(req) ? nvme_cmd_write : nvme_cmd_read);
cmnd->rw.nsid = cpu_to_le32(ns->head->ns_id);
- cmnd->rw.slba = cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req)));
+ cmnd->rw.slba = cpu_to_le64(nvme_sect_to_lba(ns, blk_rq_pos(req)));
cmnd->rw.length = cpu_to_le16((blk_rq_bytes(req) >> ns->lba_shift) - 1);
if (req_op(req) == REQ_OP_WRITE && ctrl->nr_streams)
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 22e8401352c2..617ee8512f91 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -419,9 +419,12 @@ static inline int nvme_reset_subsystem(struct nvme_ctrl *ctrl)
return ctrl->ops->reg_write32(ctrl, NVME_REG_NSSR, 0x4E564D65);
}
-static inline u64 nvme_block_nr(struct nvme_ns *ns, sector_t sector)
+/*
+ * Convert a 512B sector number to a device logical block number.
+ */
+static inline u64 nvme_sect_to_lba(struct nvme_ns *ns, sector_t sector)
{
- return (sector >> (ns->lba_shift - 9));
+ return sector >> (ns->lba_shift - SECTOR_SHIFT);
}
static inline void nvme_end_request(struct request *req, __le16 status,
--
2.21.0
next prev parent reply other threads:[~2019-10-21 3:40 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-21 3:40 [PATCH 0/2 v2] Small cleanups Damien Le Moal
2019-10-21 3:40 ` Damien Le Moal [this message]
2019-10-21 3:44 ` [PATCH 1/2 v2] nvme: Cleanup and rename nvme_block_nr() Christoph Hellwig
2019-10-21 3:44 ` Christoph Hellwig
2019-10-21 7:14 ` Johannes Thumshirn
2019-10-21 3:40 ` [PATCH 2/2 v2] nvme: Introduce nvme_lba_to_sect() Damien Le Moal
2019-10-21 3:44 ` Christoph Hellwig
2019-10-21 7:14 ` Johannes Thumshirn
2019-10-21 13:55 ` [PATCH 0/2 v2] Small cleanups Keith Busch
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