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authorKeith Busch <keith.busch@intel.com>2015-04-07 15:34:18 -0600
committerJens Axboe <axboe@fb.com>2015-04-07 19:11:04 -0600
commit7f749d9c109223e4d1724e674e7d603082e85839 (patch)
tree5df24f1d7dc7c59cae7ad1dedc6c342aa7deec0f /drivers/block
parent447228023eaa8c96a48a8a459be7a992008df830 (diff)
downloadlinux-7f749d9c109223e4d1724e674e7d603082e85839.tar.bz2
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>
Diffstat (limited to 'drivers/block')
-rw-r--r--drivers/block/nvme-scsi.c28
1 files changed, 27 insertions, 1 deletions
diff --git a/drivers/block/nvme-scsi.c b/drivers/block/nvme-scsi.c
index e10196e0182d..6b736b00f63e 100644
--- a/drivers/block/nvme-scsi.c
+++ b/drivers/block/nvme-scsi.c
@@ -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;