Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
drivers/nvme/host/core.c | 26 +++++++++++++++++++-------
1 file changed, 19 insertions(+), 7 deletions(-)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index efe8ec300126..ae9254fcd9c5 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -238,26 +238,36 @@ static inline void nvme_setup_flush(struct nvme_ns *ns,
static inline int nvme_setup_discard(struct nvme_ns *ns, struct request *req,
struct nvme_command *cmnd)
{
+ unsigned short segments = blk_rq_nr_discard_segments(req), n = 0;
struct nvme_dsm_range *range;
- unsigned int nr_bytes = blk_rq_bytes(req);
+ struct bio *bio;
- range = kmalloc(sizeof(*range), GFP_ATOMIC);
+ range = kmalloc_array(segments, sizeof(*range), GFP_ATOMIC);
if (!range)
return BLK_MQ_RQ_QUEUE_BUSY;
- range->cattr = cpu_to_le32(0);
- range->nlb = cpu_to_le32(nr_bytes >> ns->lba_shift);
- range->slba = cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req)));
+ __rq_for_each_bio(bio, req) {
+ u64 slba = nvme_block_nr(ns, bio->bi_iter.bi_sector);
+ u32 nlb = bio->bi_iter.bi_size >> ns->lba_shift;
+
+ range[n].cattr = cpu_to_le32(0);
+ range[n].nlb = cpu_to_le32(nlb);
+ range[n].slba = cpu_to_le64(slba);
+ n++;
+ }
+
+ if (WARN_ON_ONCE(n != segments))
+ return BLK_MQ_RQ_QUEUE_ERROR;
memset(cmnd, 0, sizeof(*cmnd));
cmnd->dsm.opcode = nvme_cmd_dsm;
cmnd->dsm.nsid = cpu_to_le32(ns->ns_id);
- cmnd->dsm.nr = 0;
+ cmnd->dsm.nr = segments - 1;
cmnd->dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD);
req->special_vec.bv_page = virt_to_page(range);
req->special_vec.bv_offset = offset_in_page(range);
- req->special_vec.bv_len = sizeof(*range);
+ req->special_vec.bv_len = sizeof(*range) * segments;
req->rq_flags |= RQF_SPECIAL_PAYLOAD;
return BLK_MQ_RQ_QUEUE_OK;
@@ -1233,6 +1243,8 @@ static void nvme_set_queue_limits(struct nvme_ctrl *ctrl,
if (ctrl->vwc & NVME_CTRL_VWC_PRESENT)
vwc = true;
blk_queue_write_cache(q, vwc, vwc);
+ blk_queue_max_discard_segments(q,
+ PAGE_SIZE / sizeof(struct nvme_dsm_range));
}
/*
--
2.11.0
