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 #ifdef CONFIG_LOOPBACK_TARGET_CDB_DEBUG
  20 # define TL_CDB_DEBUG(x...)             printk(KERN_INFO x)
  21 #else
  22 # define TL_CDB_DEBUG(x...)
  23 #endif
  24
  25 struct tcm_loop_cmd {
  26         /* State of Linux/SCSI CDB+Data descriptor */
  27         u32 sc_cmd_state;
  28         /* Pointer to the CDB+Data descriptor from Linux/SCSI subsystem */
  29         struct scsi_cmnd *sc;
  30         struct list_head *tl_cmd_list;
  31         /* The TCM I/O descriptor that is accessed via container_of() */
  32         struct se_cmd tl_se_cmd;
  33         /* Sense buffer that will be mapped into outgoing status */
  34         unsigned char tl_sense_buf[TRANSPORT_SENSE_BUFFER];
  35 };
  36
  37 struct tcm_loop_tmr {
  38         atomic_t tmr_complete;
  39         wait_queue_head_t tl_tmr_wait;
  40 };
  41
  42 struct tcm_loop_nexus {
  43         int it_nexus_active;
  44         /*
  45          * Pointer to Linux/SCSI HBA from linux/include/scsi_host.h
  46          */
  47         struct scsi_host *sh;
  48         /*
  49          * Pointer to TCM session for I_T Nexus
  50          */
  51         struct se_session *se_sess;
  52 };
  53
  54 struct tcm_loop_nacl {
  55         struct se_node_acl se_node_acl;
  56 };
  57
  58 struct tcm_loop_tpg {
  59         unsigned short tl_tpgt;
  60         atomic_t tl_tpg_port_count;
  61         struct se_portal_group tl_se_tpg;
  62         struct tcm_loop_hba *tl_hba;
  63 };
  64
  65 struct tcm_loop_hba {
  66         u8 tl_proto_id;
  67         unsigned char tl_wwn_address[TL_WWN_ADDR_LEN];
  68         struct se_hba_s *se_hba;
  69         struct se_lun *tl_hba_lun;
  70         struct se_port *tl_hba_lun_sep;
  71         struct se_device_s *se_dev_hba_ptr;
  72         struct tcm_loop_nexus *tl_nexus;
  73         struct device dev;
  74         struct Scsi_Host *sh;
  75         struct tcm_loop_tpg tl_hba_tpgs[TL_TPGS_PER_HBA];
  76         struct se_wwn tl_hba_wwn;
  77 };