drivers/target/sbp/sbp_target.h

   1 #ifndef _SBP_BASE_H
   2 #define _SBP_BASE_H
   3
   4 #include <linux/firewire.h>
   5 #include <linux/spinlock.h>
   6 #include <linux/types.h>
   7 #include <linux/workqueue.h>
   8 #include <target/target_core_base.h>
   9
  10 #define SBP_VERSION  "v0.1"
  11 #define SBP_NAMELEN 32
  12
  13 #define SBP_ORB_FETCH_SIZE      8
  14
  15 #define MANAGEMENT_AGENT_STATE_IDLE     0
  16 #define MANAGEMENT_AGENT_STATE_BUSY     1
  17
  18 #define ORB_NOTIFY(v)                   (((v) >> 31) & 0x01)
  19 #define ORB_REQUEST_FORMAT(v)           (((v) >> 29) & 0x03)
  20
  21 #define MANAGEMENT_ORB_FUNCTION(v)      (((v) >> 16) & 0x0f)
  22
  23 #define MANAGEMENT_ORB_FUNCTION_LOGIN                   0x0
  24 #define MANAGEMENT_ORB_FUNCTION_QUERY_LOGINS            0x1
  25 #define MANAGEMENT_ORB_FUNCTION_RECONNECT               0x3
  26 #define MANAGEMENT_ORB_FUNCTION_SET_PASSWORD            0x4
  27 #define MANAGEMENT_ORB_FUNCTION_LOGOUT                  0x7
  28 #define MANAGEMENT_ORB_FUNCTION_ABORT_TASK              0xb
  29 #define MANAGEMENT_ORB_FUNCTION_ABORT_TASK_SET          0xc
  30 #define MANAGEMENT_ORB_FUNCTION_LOGICAL_UNIT_RESET      0xe
  31 #define MANAGEMENT_ORB_FUNCTION_TARGET_RESET            0xf
  32
  33 #define LOGIN_ORB_EXCLUSIVE(v)          (((v) >> 28) &   0x01)
  34 #define LOGIN_ORB_RESERVED(v)           (((v) >> 24) &   0x0f)
  35 #define LOGIN_ORB_RECONNECT(v)          (((v) >> 20) &   0x0f)
  36 #define LOGIN_ORB_LUN(v)                (((v) >>  0) & 0xffff)
  37 #define LOGIN_ORB_PASSWORD_LENGTH(v)    (((v) >> 16) & 0xffff)
  38 #define LOGIN_ORB_RESPONSE_LENGTH(v)    (((v) >>  0) & 0xffff)
  39
  40 #define RECONNECT_ORB_LOGIN_ID(v)       (((v) >>  0) & 0xffff)
  41 #define LOGOUT_ORB_LOGIN_ID(v)          (((v) >>  0) & 0xffff)
  42
  43 #define CMDBLK_ORB_DIRECTION(v)         (((v) >> 27) &   0x01)
  44 #define CMDBLK_ORB_SPEED(v)             (((v) >> 24) &   0x07)
  45 #define CMDBLK_ORB_MAX_PAYLOAD(v)       (((v) >> 20) &   0x0f)
  46 #define CMDBLK_ORB_PG_TBL_PRESENT(v)    (((v) >> 19) &   0x01)
  47 #define CMDBLK_ORB_PG_SIZE(v)           (((v) >> 16) &   0x07)
  48 #define CMDBLK_ORB_DATA_SIZE(v)         (((v) >>  0) & 0xffff)
  49
  50 #define STATUS_BLOCK_SRC(v)             (((v) &   0x03) << 30)
  51 #define STATUS_BLOCK_RESP(v)            (((v) &   0x03) << 28)
  52 #define STATUS_BLOCK_DEAD(v)            (((v) ? 1 : 0)  << 27)
  53 #define STATUS_BLOCK_LEN(v)             (((v) &   0x07) << 24)
  54 #define STATUS_BLOCK_SBP_STATUS(v)      (((v) &   0xff) << 16)
  55 #define STATUS_BLOCK_ORB_OFFSET_HIGH(v) (((v) & 0xffff) <<  0)
  56
  57 #define STATUS_SRC_ORB_CONTINUING       0
  58 #define STATUS_SRC_ORB_FINISHED         1
  59 #define STATUS_SRC_UNSOLICITED          2
  60
  61 #define STATUS_RESP_REQUEST_COMPLETE    0
  62 #define STATUS_RESP_TRANSPORT_FAILURE   1
  63 #define STATUS_RESP_ILLEGAL_REQUEST     2
  64 #define STATUS_RESP_VENDOR_DEPENDENT    3
  65
  66 #define SBP_STATUS_OK                   0
  67 #define SBP_STATUS_REQ_TYPE_NOTSUPP     1
  68 #define SBP_STATUS_SPEED_NOTSUPP        2
  69 #define SBP_STATUS_PAGE_SIZE_NOTSUPP    3
  70 #define SBP_STATUS_ACCESS_DENIED        4
  71 #define SBP_STATUS_LUN_NOTSUPP          5
  72 #define SBP_STATUS_PAYLOAD_TOO_SMALL    6
  73 /* 7 is reserved */
  74 #define SBP_STATUS_RESOURCES_UNAVAIL    8
  75 #define SBP_STATUS_FUNCTION_REJECTED    9
  76 #define SBP_STATUS_LOGIN_ID_UNKNOWN     10
  77 #define SBP_STATUS_DUMMY_ORB_COMPLETE   11
  78 #define SBP_STATUS_REQUEST_ABORTED      12
  79 #define SBP_STATUS_UNSPECIFIED_ERROR    0xff
  80
  81 #define AGENT_STATE_RESET       0
  82 #define AGENT_STATE_ACTIVE      1
  83 #define AGENT_STATE_SUSPENDED   2
  84 #define AGENT_STATE_DEAD        3
  85
  86 struct sbp2_pointer {
  87         __be32 high;
  88         __be32 low;
  89 };
  90
  91 struct sbp_command_block_orb {
  92         struct sbp2_pointer next_orb;
  93         struct sbp2_pointer data_descriptor;
  94         __be32 misc;
  95         u8 command_block[12];
  96 };
  97
  98 struct sbp_page_table_entry {
  99         __be16 segment_length;
 100         __be16 segment_base_hi;
 101         __be32 segment_base_lo;
 102 };
 103
 104 struct sbp_management_orb {
 105         struct sbp2_pointer ptr1;
 106         struct sbp2_pointer ptr2;
 107         __be32 misc;
 108         __be32 length;
 109         struct sbp2_pointer status_fifo;
 110 };
 111
 112 struct sbp_status_block {
 113         __be32 status;
 114         __be32 orb_low;
 115         u8 data[24];
 116 };
 117
 118 struct sbp_login_response_block {
 119         __be32 misc;
 120         struct sbp2_pointer command_block_agent;
 121         __be32 reconnect_hold;
 122 };
 123
 124 struct sbp_login_descriptor {
 125         struct sbp_session *sess;
 126         struct list_head link;
 127
 128         u32 login_lun;
 129
 130         u64 status_fifo_addr;
 131         int exclusive;
 132         u16 login_id;
 133
 134         struct sbp_target_agent *tgt_agt;
 135 };
 136
 137 struct sbp_session {
 138         spinlock_t lock;
 139         struct se_session *se_sess;
 140         struct list_head login_list;
 141         struct delayed_work maint_work;
 142
 143         u64 guid; /* login_owner_EUI_64 */
 144         int node_id; /* login_owner_ID */
 145
 146         struct fw_card *card;
 147         int generation;
 148         int speed;
 149
 150         int reconnect_hold;
 151         u64 reconnect_expires;
 152 };
 153
 154 struct sbp_tpg {
 155         /* Target portal group tag for TCM */
 156         u16 tport_tpgt;
 157         /* Pointer back to sbp_tport */
 158         struct sbp_tport *tport;
 159         /* Returned by sbp_make_tpg() */
 160         struct se_portal_group se_tpg;
 161 };
 162
 163 struct sbp_tport {
 164         /* Target Unit Identifier (EUI-64) */
 165         u64 guid;
 166         /* Target port name */
 167         char tport_name[SBP_NAMELEN];
 168         /* Returned by sbp_make_tport() */
 169         struct se_wwn tport_wwn;
 170
 171         struct sbp_tpg *tpg;
 172
 173         /* FireWire unit directory */
 174         struct fw_descriptor unit_directory;
 175
 176         /* SBP Management Agent */
 177         struct sbp_management_agent *mgt_agt;
 178
 179         /* Parameters */
 180         int enable;
 181         s32 directory_id;
 182         int mgt_orb_timeout;
 183         int max_reconnect_timeout;
 184         int max_logins_per_lun;
 185 };
 186
 187 static inline u64 sbp2_pointer_to_addr(const struct sbp2_pointer *ptr)
 188 {
 189         return (u64)(be32_to_cpu(ptr->high) & 0x0000ffff) << 32 |
 190                 (be32_to_cpu(ptr->low) & 0xfffffffc);
 191 }
 192
 193 static inline void addr_to_sbp2_pointer(u64 addr, struct sbp2_pointer *ptr)
 194 {
 195         ptr->high = cpu_to_be32(addr >> 32);
 196         ptr->low = cpu_to_be32(addr);
 197 }
 198
 199 struct sbp_target_agent {
 200         spinlock_t lock;
 201         struct fw_address_handler handler;
 202         struct sbp_login_descriptor *login;
 203         int state;
 204         struct work_struct work;
 205         u64 orb_pointer;
 206         bool doorbell;
 207 };
 208
 209 struct sbp_target_request {
 210         struct sbp_login_descriptor *login;
 211         u64 orb_pointer;
 212         struct sbp_command_block_orb orb;
 213         struct sbp_status_block status;
 214         struct work_struct work;
 215
 216         struct se_cmd se_cmd;
 217         struct sbp_page_table_entry *pg_tbl;
 218         void *cmd_buf;
 219
 220         unsigned char sense_buf[TRANSPORT_SENSE_BUFFER];
 221 };
 222
 223 struct sbp_management_agent {
 224         spinlock_t lock;
 225         struct sbp_tport *tport;
 226         struct fw_address_handler handler;
 227         int state;
 228         struct work_struct work;
 229         u64 orb_offset;
 230         struct sbp_management_request *request;
 231 };
 232
 233 struct sbp_management_request {
 234         struct sbp_management_orb orb;
 235         struct sbp_status_block status;
 236         struct fw_card *card;
 237         int generation;
 238         int node_addr;
 239         int speed;
 240 };
 241
 242 #endif