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NVMe: Add translation for block limits 

Adds SCSI-to-NVMe translation for VPD B0h, block limits inquiry data.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Keith Busch 2015-04-07 15:34:18 -06:00 committed by Jens Axboe
parent 447228023e
commit 7f749d9c10
1 changed files with 27 additions and 1 deletions
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28
drivers/block/nvme-scsi.c
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@ -55,6 +55,7 @@ static int sg_version_num = 30534; /* 2 digits for each component */
#define VPD_SERIAL_NUMBER 0x80
#define VPD_DEVICE_IDENTIFIERS 0x83
#define VPD_EXTENDED_INQUIRY 0x86
#define VPD_BLOCK_LIMITS 0xB0
#define VPD_BLOCK_DEV_CHARACTERISTICS 0xB1
/* CDB offsets */
@ -132,9 +133,10 @@ static int sg_version_num = 30534; /* 2 digits for each component */
#define INQ_UNIT_SERIAL_NUMBER_PAGE 0x80
#define INQ_DEVICE_IDENTIFICATION_PAGE 0x83
#define INQ_EXTENDED_INQUIRY_DATA_PAGE 0x86
#define INQ_BDEV_LIMITS_PAGE 0xB0
#define INQ_BDEV_CHARACTERISTICS_PAGE 0xB1
#define INQ_SERIAL_NUMBER_LENGTH 0x14
#define INQ_NUM_SUPPORTED_VPD_PAGES 5
#define INQ_NUM_SUPPORTED_VPD_PAGES 6
#define VERSION_SPC_4 0x06
#define ACA_UNSUPPORTED 0
#define STANDARD_INQUIRY_LENGTH 36
@ -747,6 +749,7 @@ static int nvme_trans_supported_vpd_pages(struct nvme_ns *ns,
inq_response[6] = INQ_DEVICE_IDENTIFICATION_PAGE;
inq_response[7] = INQ_EXTENDED_INQUIRY_DATA_PAGE;
inq_response[8] = INQ_BDEV_CHARACTERISTICS_PAGE;
inq_response[9] = INQ_BDEV_LIMITS_PAGE;
xfer_len = min(alloc_len, STANDARD_INQUIRY_LENGTH);
res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
@ -938,6 +941,25 @@ static int nvme_trans_ext_inq_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
return res;
}
static int nvme_trans_bdev_limits_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *inq_response, int alloc_len)
{
__be32 max_sectors = cpu_to_be32(queue_max_hw_sectors(ns->queue));
__be32 max_discard = cpu_to_be32(ns->queue->limits.max_discard_sectors);
__be32 discard_desc_count = cpu_to_be32(0x100);
memset(inq_response, 0, STANDARD_INQUIRY_LENGTH);
inq_response[1] = VPD_BLOCK_LIMITS;
inq_response[3] = 0x3c; /* Page Length */
memcpy(&inq_response[8], &max_sectors, sizeof(u32));
memcpy(&inq_response[20], &max_discard, sizeof(u32));
if (max_discard)
memcpy(&inq_response[24], &discard_desc_count, sizeof(u32));
return nvme_trans_copy_to_user(hdr, inq_response, 0x3c);
}
static int nvme_trans_bdev_char_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
int alloc_len)
{
@ -2268,6 +2290,10 @@ static int nvme_trans_inquiry(struct nvme_ns *ns, struct sg_io_hdr *hdr,
case VPD_EXTENDED_INQUIRY:
res = nvme_trans_ext_inq_page(ns, hdr, alloc_len);
break;
case VPD_BLOCK_LIMITS:
res = nvme_trans_bdev_limits_page(ns, hdr, inq_response,
alloc_len);
break;
case VPD_BLOCK_DEV_CHARACTERISTICS:
res = nvme_trans_bdev_char_page(ns, hdr, alloc_len);
break;