summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorChristoph Hellwig <hch@lst.de>2017-04-05 19:21:13 +0200
committerJens Axboe <axboe@fb.com>2017-04-08 11:25:38 -0600
commite850fd16f751a6dd1af52fd874225b1231ba9014 (patch)
treeb4dfcbb1b0ade6711814adc25ed468cf310576f2
parente4b878371b85ddcd3e00eb68fa45e61793c37af0 (diff)
nvme: implement REQ_OP_WRITE_ZEROES
But now for the real NVMe Write Zeroes yet, just to get rid of the discard abuse for zeroing. Also rename the quirk flag to be a bit more self-explanatory. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Jens Axboe <axboe@fb.com>
-rw-r--r--drivers/nvme/host/core.c10
-rw-r--r--drivers/nvme/host/nvme.h6
-rw-r--r--drivers/nvme/host/pci.c6
3 files changed, 11 insertions, 11 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 14fbe9d80067..d33f829c3ab7 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -368,6 +368,8 @@ int nvme_setup_cmd(struct nvme_ns *ns, struct request *req,
case REQ_OP_FLUSH:
nvme_setup_flush(ns, cmd);
break;
+ case REQ_OP_WRITE_ZEROES:
+ /* currently only aliased to deallocate for a few ctrls: */
case REQ_OP_DISCARD:
ret = nvme_setup_discard(ns, req, cmd);
break;
@@ -933,16 +935,14 @@ static void nvme_config_discard(struct nvme_ns *ns)
BUILD_BUG_ON(PAGE_SIZE / sizeof(struct nvme_dsm_range) <
NVME_DSM_MAX_RANGES);
- if (ctrl->quirks & NVME_QUIRK_DISCARD_ZEROES)
- ns->queue->limits.discard_zeroes_data = 1;
- else
- ns->queue->limits.discard_zeroes_data = 0;
-
ns->queue->limits.discard_alignment = logical_block_size;
ns->queue->limits.discard_granularity = logical_block_size;
blk_queue_max_discard_sectors(ns->queue, UINT_MAX);
blk_queue_max_discard_segments(ns->queue, NVME_DSM_MAX_RANGES);
queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue);
+
+ if (ctrl->quirks & NVME_QUIRK_DEALLOCATE_ZEROES)
+ blk_queue_max_write_zeroes_sectors(ns->queue, UINT_MAX);
}
static int nvme_revalidate_ns(struct nvme_ns *ns, struct nvme_id_ns **id)
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 9eecb67177df..a317461c21d3 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -66,10 +66,10 @@ enum nvme_quirks {
NVME_QUIRK_IDENTIFY_CNS = (1 << 1),
/*
- * The controller deterministically returns O's on reads to discarded
- * logical blocks.
+ * The controller deterministically returns O's on reads to
+ * logical blocks that deallocate was called on.
*/
- NVME_QUIRK_DISCARD_ZEROES = (1 << 2),
+ NVME_QUIRK_DEALLOCATE_ZEROES = (1 << 2),
/*
* The controller needs a delay before starts checking the device
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 3818ab15a26e..f7a9f3fb5fdb 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -2109,13 +2109,13 @@ static const struct pci_error_handlers nvme_err_handler = {
static const struct pci_device_id nvme_id_table[] = {
{ PCI_VDEVICE(INTEL, 0x0953),
.driver_data = NVME_QUIRK_STRIPE_SIZE |
- NVME_QUIRK_DISCARD_ZEROES, },
+ NVME_QUIRK_DEALLOCATE_ZEROES, },
{ PCI_VDEVICE(INTEL, 0x0a53),
.driver_data = NVME_QUIRK_STRIPE_SIZE |
- NVME_QUIRK_DISCARD_ZEROES, },
+ NVME_QUIRK_DEALLOCATE_ZEROES, },
{ PCI_VDEVICE(INTEL, 0x0a54),
.driver_data = NVME_QUIRK_STRIPE_SIZE |
- NVME_QUIRK_DISCARD_ZEROES, },
+ NVME_QUIRK_DEALLOCATE_ZEROES, },
{ PCI_VDEVICE(INTEL, 0x5845), /* Qemu emulated controller */
.driver_data = NVME_QUIRK_IDENTIFY_CNS, },
{ PCI_DEVICE(0x1c58, 0x0003), /* HGST adapter */