From 7f749d9c109223e4d1724e674e7d603082e85839 Mon Sep 17 00:00:00 2001 From: Keith Busch Date: Tue, 7 Apr 2015 15:34:18 -0600 Subject: NVMe: Add translation for block limits Adds SCSI-to-NVMe translation for VPD B0h, block limits inquiry data. Signed-off-by: Keith Busch Signed-off-by: Jens Axboe --- drivers/block/nvme-scsi.c | 28 +++++++++++++++++++++++++++- 1 file changed, 27 insertions(+), 1 deletion(-) (limited to 'drivers/block') diff --git a/drivers/block/nvme-scsi.c b/drivers/block/nvme-scsi.c index e10196e..6b736b0 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; -- cgit v1.1