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path: root/drivers/target/loopback/tcm_loop.h
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Diffstat (limited to 'drivers/target/loopback/tcm_loop.h')
-rw-r--r--drivers/target/loopback/tcm_loop.h77
1 files changed, 77 insertions, 0 deletions
diff --git a/drivers/target/loopback/tcm_loop.h b/drivers/target/loopback/tcm_loop.h
new file mode 100644
index 000000000000..7e9f7ab45548
--- /dev/null
+++ b/drivers/target/loopback/tcm_loop.h
@@ -0,0 +1,77 @@
+#define TCM_LOOP_VERSION "v2.1-rc1"
+#define TL_WWN_ADDR_LEN 256
+#define TL_TPGS_PER_HBA 32
+/*
+ * Defaults for struct scsi_host_template tcm_loop_driver_template
+ *
+ * We use large can_queue and cmd_per_lun here and let TCM enforce
+ * the underlying se_device_t->queue_depth.
+ */
+#define TL_SCSI_CAN_QUEUE 1024
+#define TL_SCSI_CMD_PER_LUN 1024
+#define TL_SCSI_MAX_SECTORS 1024
+#define TL_SCSI_SG_TABLESIZE 256
+/*
+ * Used in tcm_loop_driver_probe() for struct Scsi_Host->max_cmd_len
+ */
+#define TL_SCSI_MAX_CMD_LEN 32
+
+#ifdef CONFIG_LOOPBACK_TARGET_CDB_DEBUG
+# define TL_CDB_DEBUG(x...) printk(KERN_INFO x)
+#else
+# define TL_CDB_DEBUG(x...)
+#endif
+
+struct tcm_loop_cmd {
+ /* State of Linux/SCSI CDB+Data descriptor */
+ u32 sc_cmd_state;
+ /* Pointer to the CDB+Data descriptor from Linux/SCSI subsystem */
+ struct scsi_cmnd *sc;
+ struct list_head *tl_cmd_list;
+ /* The TCM I/O descriptor that is accessed via container_of() */
+ struct se_cmd tl_se_cmd;
+ /* Sense buffer that will be mapped into outgoing status */
+ unsigned char tl_sense_buf[TRANSPORT_SENSE_BUFFER];
+};
+
+struct tcm_loop_tmr {
+ atomic_t tmr_complete;
+ wait_queue_head_t tl_tmr_wait;
+};
+
+struct tcm_loop_nexus {
+ int it_nexus_active;
+ /*
+ * Pointer to Linux/SCSI HBA from linux/include/scsi_host.h
+ */
+ struct scsi_host *sh;
+ /*
+ * Pointer to TCM session for I_T Nexus
+ */
+ struct se_session *se_sess;
+};
+
+struct tcm_loop_nacl {
+ struct se_node_acl se_node_acl;
+};
+
+struct tcm_loop_tpg {
+ unsigned short tl_tpgt;
+ atomic_t tl_tpg_port_count;
+ struct se_portal_group tl_se_tpg;
+ struct tcm_loop_hba *tl_hba;
+};
+
+struct tcm_loop_hba {
+ u8 tl_proto_id;
+ unsigned char tl_wwn_address[TL_WWN_ADDR_LEN];
+ struct se_hba_s *se_hba;
+ struct se_lun *tl_hba_lun;
+ struct se_port *tl_hba_lun_sep;
+ struct se_device_s *se_dev_hba_ptr;
+ struct tcm_loop_nexus *tl_nexus;
+ struct device dev;
+ struct Scsi_Host *sh;
+ struct tcm_loop_tpg tl_hba_tpgs[TL_TPGS_PER_HBA];
+ struct se_wwn tl_hba_wwn;
+};

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