[SCSI] bfa: Introduced initiator based lun masking feature.

- Added support to enable initiator based lun masking.
- Initiator based Lun masking works similar to zoning where
  initiator port is allowed to see only those LUNs which are
  configured to be seen.

Signed-off-by: Krishna Gudipati <kgudipat@brocade.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 155 insertions, 1 deletions

diff --git a/drivers/scsi/bfa/bfa_fc.h b/drivers/scsi/bfa/bfa_fc.h
index a007345e472a..50b6a1c86195 100644
--- a/drivers/scsi/bfa/bfa_fc.h
+++ b/drivers/scsi/bfa/bfa_fc.h
@@ -21,7 +21,6 @@
 #include "bfad_drv.h"
 
 typedef u64 wwn_t;
-typedef u64 lun_t;
 
 #define WWN_NULL        (0)
 #define FC_SYMNAME_MAX  256     /*  max name server symbolic name size */
@@ -57,6 +56,161 @@ struct scsi_cdb_s {
 
 #define SCSI_MAX_ALLOC_LEN      0xFF    /* maximum allocarion length */
 
+#define SCSI_SENSE_CUR_ERR      0x70
+#define SCSI_SENSE_DEF_ERR      0x71
+
+/*
+ * SCSI additional sense codes
+ */
+#define SCSI_ASC_LUN_NOT_READY          0x04
+#define SCSI_ASC_LUN_NOT_SUPPORTED      0x25
+#define SCSI_ASC_TOCC                   0x3F
+
+/*
+ * SCSI additional sense code qualifiers
+ */
+#define SCSI_ASCQ_MAN_INTR_REQ          0x03    /* manual intervention req */
+#define SCSI_ASCQ_RL_DATA_CHANGED       0x0E    /* report luns data changed */
+
+/*
+ * Methods of reporting informational exceptions
+ */
+#define SCSI_MP_IEC_UNIT_ATTN           0x2     /* generate unit attention */
+
+struct scsi_report_luns_data_s {
+        u32             lun_list_length;        /* length of LUN list length */
+        u32             reserved;
+        struct scsi_lun lun[1];                 /* first LUN in lun list */
+};
+
+struct scsi_inquiry_vendor_s {
+        u8      vendor_id[8];
+};
+
+struct scsi_inquiry_prodid_s {
+        u8      product_id[16];
+};
+
+struct scsi_inquiry_prodrev_s {
+        u8      product_rev[4];
+};
+
+struct scsi_inquiry_data_s {
+#ifdef __BIG_ENDIAN
+        u8              peripheral_qual:3;      /* peripheral qualifier */
+        u8              device_type:5;          /* peripheral device type */
+        u8              rmb:1;                  /* removable medium bit */
+        u8              device_type_mod:7;      /* device type modifier */
+        u8              version;
+        u8              aenc:1;         /* async evt notification capability */
+        u8              trm_iop:1;      /* terminate I/O process */
+        u8              norm_aca:1;     /* normal ACA supported */
+        u8              hi_support:1;   /* SCSI-3: supports REPORT LUNS */
+        u8              rsp_data_format:4;
+        u8              additional_len;
+        u8              sccs:1;
+        u8              reserved1:7;
+        u8              reserved2:1;
+        u8              enc_serv:1;     /* enclosure service component */
+        u8              reserved3:1;
+        u8              multi_port:1;   /* multi-port device */
+        u8              m_chngr:1;      /* device in medium transport element */
+        u8              ack_req_q:1;    /* SIP specific bit */
+        u8              addr32:1;       /* SIP specific bit */
+        u8              addr16:1;       /* SIP specific bit */
+        u8              rel_adr:1;      /* relative address */
+        u8              w_bus32:1;
+        u8              w_bus16:1;
+        u8              synchronous:1;
+        u8              linked_commands:1;
+        u8              trans_dis:1;
+        u8              cmd_queue:1;    /* command queueing supported */
+        u8              soft_reset:1;   /* soft reset alternative (VS) */
+#else
+        u8              device_type:5;  /* peripheral device type */
+        u8              peripheral_qual:3; /* peripheral qualifier */
+        u8              device_type_mod:7; /* device type modifier */
+        u8              rmb:1;          /* removable medium bit */
+        u8              version;
+        u8              rsp_data_format:4;
+        u8              hi_support:1;   /* SCSI-3: supports REPORT LUNS */
+        u8              norm_aca:1;     /* normal ACA supported */
+        u8              terminate_iop:1;/* terminate I/O process */
+        u8              aenc:1;         /* async evt notification capability */
+        u8              additional_len;
+        u8              reserved1:7;
+        u8              sccs:1;
+        u8              addr16:1;       /* SIP specific bit */
+        u8              addr32:1;       /* SIP specific bit */
+        u8              ack_req_q:1;    /* SIP specific bit */
+        u8              m_chngr:1;      /* device in medium transport element */
+        u8              multi_port:1;   /* multi-port device */
+        u8              reserved3:1;    /* TBD - Vendor Specific */
+        u8              enc_serv:1;     /* enclosure service component */
+        u8              reserved2:1;
+        u8              soft_seset:1;   /* soft reset alternative (VS) */
+        u8              cmd_queue:1;    /* command queueing supported */
+        u8              trans_dis:1;
+        u8              linked_commands:1;
+        u8              synchronous:1;
+        u8              w_bus16:1;
+        u8              w_bus32:1;
+        u8              rel_adr:1;      /* relative address */
+#endif
+        struct scsi_inquiry_vendor_s    vendor_id;
+        struct scsi_inquiry_prodid_s    product_id;
+        struct scsi_inquiry_prodrev_s   product_rev;
+        u8              vendor_specific[20];
+        u8              reserved4[40];
+};
+
+/*
+ *      SCSI sense data format
+ */
+struct scsi_sense_s {
+#ifdef __BIG_ENDIAN
+        u8              valid:1;
+        u8              rsp_code:7;
+#else
+        u8              rsp_code:7;
+        u8              valid:1;
+#endif
+        u8              seg_num;
+#ifdef __BIG_ENDIAN
+        u8              file_mark:1;
+        u8              eom:1;          /* end of media */
+        u8              ili:1;          /* incorrect length indicator */
+        u8              reserved:1;
+        u8              sense_key:4;
+#else
+        u8              sense_key:4;
+        u8              reserved:1;
+        u8              ili:1;          /* incorrect length indicator */
+        u8              eom:1;          /* end of media */
+        u8              file_mark:1;
+#endif
+        u8              information[4]; /* device-type or cmd specific info */
+        u8              add_sense_length; /* additional sense length */
+        u8              command_info[4];/* command specific information */
+        u8              asc;            /* additional sense code */
+        u8              ascq;           /* additional sense code qualifier */
+        u8              fru_code;       /* field replaceable unit code */
+#ifdef __BIG_ENDIAN
+        u8              sksv:1;         /* sense key specific valid */
+        u8              c_d:1;          /* command/data bit */
+        u8              res1:2;
+        u8              bpv:1;          /* bit pointer valid */
+        u8              bpointer:3;     /* bit pointer */
+#else
+        u8              bpointer:3;     /* bit pointer */
+        u8              bpv:1;          /* bit pointer valid */
+        u8              res1:2;
+        u8              c_d:1;          /* command/data bit */
+        u8              sksv:1;         /* sense key specific valid */
+#endif
+        u8              fpointer[2];    /* field pointer */
+};
+
 /*
  * Fibre Channel Header Structure (FCHS) definition
  */