drivers/target/loopback/tcm_loop.h

   1 #define TCM_LOOP_VERSION                "v2.1-rc1"
   2 #define TL_WWN_ADDR_LEN                 256
   3 #define TL_TPGS_PER_HBA                 32
   4 /*
   5  * Defaults for struct scsi_host_template tcm_loop_driver_template
   6  *
   7  * We use large can_queue and cmd_per_lun here and let TCM enforce
   8  * the underlying se_device_t->queue_depth.
   9  */
  10 #define TL_SCSI_CAN_QUEUE               1024
  11 #define TL_SCSI_CMD_PER_LUN             1024
  12 #define TL_SCSI_MAX_SECTORS             1024
  13 #define TL_SCSI_SG_TABLESIZE            256
  14 /*
  15  * Used in tcm_loop_driver_probe() for struct Scsi_Host->max_cmd_len
  16  */
  17 #define TL_SCSI_MAX_CMD_LEN             32
  18
  19 struct tcm_loop_cmd {
  20         /* State of Linux/SCSI CDB+Data descriptor */
  21         u32 sc_cmd_state;
  22         /* Pointer to the CDB+Data descriptor from Linux/SCSI subsystem */
  23         struct scsi_cmnd *sc;
  24         struct list_head *tl_cmd_list;
  25         /* The TCM I/O descriptor that is accessed via container_of() */
  26         struct se_cmd tl_se_cmd;
  27         /* Sense buffer that will be mapped into outgoing status */
  28         unsigned char tl_sense_buf[TRANSPORT_SENSE_BUFFER];
  29 };
  30
  31 struct tcm_loop_tmr {
  32         atomic_t tmr_complete;
  33         wait_queue_head_t tl_tmr_wait;
  34 };
  35
  36 struct tcm_loop_nexus {
  37         int it_nexus_active;
  38         /*
  39          * Pointer to Linux/SCSI HBA from linux/include/scsi_host.h
  40          */
  41         struct scsi_host *sh;
  42         /*
  43          * Pointer to TCM session for I_T Nexus
  44          */
  45         struct se_session *se_sess;
  46 };
  47
  48 struct tcm_loop_nacl {
  49         struct se_node_acl se_node_acl;
  50 };
  51
  52 struct tcm_loop_tpg {
  53         unsigned short tl_tpgt;
  54         atomic_t tl_tpg_port_count;
  55         struct se_portal_group tl_se_tpg;
  56         struct tcm_loop_hba *tl_hba;
  57 };
  58
  59 struct tcm_loop_hba {
  60         u8 tl_proto_id;
  61         unsigned char tl_wwn_address[TL_WWN_ADDR_LEN];
  62         struct se_hba_s *se_hba;
  63         struct se_lun *tl_hba_lun;
  64         struct se_port *tl_hba_lun_sep;
  65         struct se_device_s *se_dev_hba_ptr;
  66         struct tcm_loop_nexus *tl_nexus;
  67         struct device dev;
  68         struct Scsi_Host *sh;
  69         struct tcm_loop_tpg tl_hba_tpgs[TL_TPGS_PER_HBA];
  70         struct se_wwn tl_hba_wwn;
  71 };