tcm_loop.h revision 3703b2c5d041a68095cdd22380c23ce27d449ad7 
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
25struct 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
37struct tcm_loop_tmr {
38	atomic_t tmr_complete;
39	wait_queue_head_t tl_tmr_wait;
40};
41
42struct 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
54struct tcm_loop_nacl {
55	struct se_node_acl se_node_acl;
56};
57
58struct 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
65struct 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};
78