nvme.h: add Write Zeroes definitions

Add the command structure, optional command set support (ONCS) bit and
a new error code for the Write Zeroes command.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@hgst.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>

diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index 18ce9f7cc8816088f4ce6e0eeb7ef8acc4a8a295..0df9466a7c38f4fcd24dfa98443b439948a5352a 100644 (file)
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -237,6 +237,7 @@ enum {
        NVME_CTRL_ONCS_COMPARE                  = 1 << 0,
        NVME_CTRL_ONCS_WRITE_UNCORRECTABLE      = 1 << 1,
        NVME_CTRL_ONCS_DSM                      = 1 << 2,
+       NVME_CTRL_ONCS_WRITE_ZEROES             = 1 << 3,
        NVME_CTRL_VWC_PRESENT                   = 1 << 0,
 };
 
@@ -543,6 +544,23 @@ struct nvme_dsm_range {
        __le64                  slba;
 };
 
+struct nvme_write_zeroes_cmd {
+       __u8                    opcode;
+       __u8                    flags;
+       __u16                   command_id;
+       __le32                  nsid;
+       __u64                   rsvd2;
+       __le64                  metadata;
+       union nvme_data_ptr     dptr;
+       __le64                  slba;
+       __le16                  length;
+       __le16                  control;
+       __le32                  dsmgmt;
+       __le32                  reftag;
+       __le16                  apptag;
+       __le16                  appmask;
+};
+
 /* Admin commands */
 
 enum nvme_admin_opcode {
@@ -839,6 +857,7 @@ struct nvme_command {
                struct nvme_download_firmware dlfw;
                struct nvme_format_cmd format;
                struct nvme_dsm_cmd dsm;
+               struct nvme_write_zeroes_cmd write_zeroes;
                struct nvme_abort_cmd abort;
                struct nvme_get_log_page_command get_log_page;
                struct nvmf_common_command fabrics;
@@ -918,6 +937,7 @@ enum {
        NVME_SC_BAD_ATTRIBUTES          = 0x180,
        NVME_SC_INVALID_PI              = 0x181,
        NVME_SC_READ_ONLY               = 0x182,
+       NVME_SC_ONCS_NOT_SUPPORTED      = 0x183,
 
        /*
         * I/O Command Set Specific - Fabrics commands: