nvme_fc: Sync FC-NVME header with standard

Update FC-NVME definitions to match FC-NVME r1.14 (16-020vB) plus
change voted in by 2/22 FC-NVME Adhoc (see HOSTID below).

Includes the following:
- Addition of "status_code" field to ERSP IU
- Addition of FC-NVME LS RJT reason_codes and reason_explanations
- CreateAssociation payload, HostID field shortened to 16 bytes

Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@fb.com>

diff --git a/include/linux/nvme-fc.h b/include/linux/nvme-fc.h
index 4b45226..e997c4a 100644 (file)
--- a/include/linux/nvme-fc.h
+++ b/include/linux/nvme-fc.h
@@ -16,8 +16,7 @@
  */
 
 /*
- * This file contains definitions relative to FC-NVME r1.11 and a few
- * newer items
+ * This file contains definitions relative to FC-NVME r1.14 (16-020vB).
  */
 
 #ifndef _NVME_FC_H
@@ -47,8 +46,15 @@ struct nvme_fc_cmd_iu {
 
 #define NVME_FC_SIZEOF_ZEROS_RSP       12
 
+enum {
+       FCNVME_SC_SUCCESS               = 0,
+       FCNVME_SC_INVALID_FIELD         = 1,
+       FCNVME_SC_INVALID_CONNID        = 2,
+};
+
 struct nvme_fc_ersp_iu {
-       __u8                    rsvd0[2];
+       __u8                    status_code;
+       __u8                    rsvd1;
        __be16                  iu_len;
        __be32                  rsn;
        __be32                  xfrd_len;
@@ -58,7 +64,7 @@ struct nvme_fc_ersp_iu {
 };
 
 
-/* FC-NVME r1.03/16-119v0 NVME Link Services */
+/* FC-NVME Link Services */
 enum {
        FCNVME_LS_RSVD                  = 0,
        FCNVME_LS_RJT                   = 1,
@@ -68,7 +74,7 @@ enum {
        FCNVME_LS_DISCONNECT            = 5,
 };
 
-/* FC-NVME r1.03/16-119v0 NVME Link Service Descriptors */
+/* FC-NVME Link Service Descriptors */
 enum {
        FCNVME_LSDESC_RSVD              = 0x0,
        FCNVME_LSDESC_RQST              = 0x1,
@@ -92,7 +98,6 @@ static inline __be32 fcnvme_lsdesc_len(size_t sz)
        return cpu_to_be32(sz - (2 * sizeof(u32)));
 }
 
-
 struct fcnvme_ls_rqst_w0 {
        u8      ls_cmd;                 /* FCNVME_LS_xxx */
        u8      zeros[3];
@@ -106,8 +111,53 @@ struct fcnvme_lsdesc_rqst {
        __be32  rsvd12;
 };
 
+/* FC-NVME LS RJT reason_code values */
+enum fcnvme_ls_rjt_reason {
+       FCNVME_RJT_RC_NONE              = 0,
+       /* no reason - not to be sent */
+
+       FCNVME_RJT_RC_INVAL             = 0x01,
+       /* invalid NVMe_LS command code */
+
+       FCNVME_RJT_RC_LOGIC             = 0x03,
+       /* logical error */
+
+       FCNVME_RJT_RC_UNAB              = 0x09,
+       /* unable to perform command request */
+
+       FCNVME_RJT_RC_UNSUP             = 0x0b,
+       /* command not supported */
+
+       FCNVME_RJT_RC_INPROG            = 0x0e,
+       /* command already in progress */
 
+       FCNVME_RJT_RC_INV_ASSOC         = 0x40,
+       /* Invalid Association ID*/
 
+       FCNVME_RJT_RC_INV_CONN          = 0x41,
+       /* Invalid Connection ID*/
+
+       FCNVME_RJT_RC_VENDOR            = 0xff,
+       /* vendor specific error */
+};
+
+/* FC-NVME LS RJT reason_explanation values */
+enum fcnvme_ls_rjt_explan {
+       FCNVME_RJT_EXP_NONE             = 0x00,
+       /* No additional explanation */
+
+       FCNVME_RJT_EXP_OXID_RXID        = 0x17,
+       /* invalid OX_ID-RX_ID combination */
+
+       FCNVME_RJT_EXP_INSUF_RES        = 0x29,
+       /* insufficient resources */
+
+       FCNVME_RJT_EXP_UNAB_DATA        = 0x2a,
+       /* unable to supply requested data */
+
+       FCNVME_RJT_EXP_INV_LEN          = 0x2d,
+       /* Invalid payload length */
+};
 
 /* FCNVME_LSDESC_RJT */
 struct fcnvme_lsdesc_rjt {
@@ -119,15 +169,15 @@ struct fcnvme_lsdesc_rjt {
         * Reject reason and explanaction codes are generic
         * to ELs's from LS-3.
         */
-       u8      reason_code;
-       u8      reason_explanation;
+       u8      reason_code;            /* fcnvme_ls_rjt_reason */
+       u8      reason_explanation;     /* fcnvme_ls_rjt_explan */
 
        u8      vendor;
        __be32  rsvd12;
 };
 
 
-#define FCNVME_ASSOC_HOSTID_LEN                64
+#define FCNVME_ASSOC_HOSTID_LEN                16
 #define FCNVME_ASSOC_HOSTNQN_LEN       256
 #define FCNVME_ASSOC_SUBNQN_LEN                256