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Revert "USB: Reset USB 3.0 devices on (re)discovery"
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / include / target / target_core_base.h
blob07fdfb6b9a9acf81da4a2d68531053faf5b55f76
1 #ifndef TARGET_CORE_BASE_H
2 #define TARGET_CORE_BASE_H
3
4 #include <linux/in.h>
5 #include <linux/configfs.h>
6 #include <linux/dma-mapping.h>
7 #include <linux/blkdev.h>
8 #include <scsi/scsi_cmnd.h>
9 #include <net/sock.h>
10 #include <net/tcp.h>
11 #include "target_core_mib.h"
12
13 #define TARGET_CORE_MOD_VERSION "v4.0.0-rc6"
14 #define SHUTDOWN_SIGS (sigmask(SIGKILL)|sigmask(SIGINT)|sigmask(SIGABRT))
15
16 /* Used by transport_generic_allocate_iovecs() */
17 #define TRANSPORT_IOV_DATA_BUFFER 5
18 /* Maximum Number of LUNs per Target Portal Group */
19 #define TRANSPORT_MAX_LUNS_PER_TPG 256
20 /*
21 * By default we use 32-byte CDBs in TCM Core and subsystem plugin code.
22 *
23 * Note that both include/scsi/scsi_cmnd.h:MAX_COMMAND_SIZE and
24 * include/linux/blkdev.h:BLOCK_MAX_CDB as of v2.6.36-rc4 still use
25 * 16-byte CDBs by default and require an extra allocation for
26 * 32-byte CDBs to becasue of legacy issues.
27 *
28 * Within TCM Core there are no such legacy limitiations, so we go ahead
29 * use 32-byte CDBs by default and use include/scsi/scsi.h:scsi_command_size()
30 * within all TCM Core and subsystem plugin code.
31 */
32 #define TCM_MAX_COMMAND_SIZE 32
33 /*
34 * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
35 * defined 96, but the real limit is 252 (or 260 including the header)
36 */
37 #define TRANSPORT_SENSE_BUFFER SCSI_SENSE_BUFFERSIZE
38 /* Used by transport_send_check_condition_and_sense() */
39 #define SPC_SENSE_KEY_OFFSET 2
40 #define SPC_ASC_KEY_OFFSET 12
41 #define SPC_ASCQ_KEY_OFFSET 13
42 #define TRANSPORT_IQN_LEN 224
43 /* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
44 #define LU_GROUP_NAME_BUF 256
45 /* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
46 #define TG_PT_GROUP_NAME_BUF 256
47 /* Used to parse VPD into struct t10_vpd */
48 #define VPD_TMP_BUF_SIZE 128
49 /* Used by transport_generic_cmd_sequencer() */
50 #define READ_BLOCK_LEN 6
51 #define READ_CAP_LEN 8
52 #define READ_POSITION_LEN 20
53 #define INQUIRY_LEN 36
54 /* Used by transport_get_inquiry_vpd_serial() */
55 #define INQUIRY_VPD_SERIAL_LEN 254
56 /* Used by transport_get_inquiry_vpd_device_ident() */
57 #define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN 254
58
59 /* struct se_hba->hba_flags */
60 enum hba_flags_table {
61 HBA_FLAGS_INTERNAL_USE = 0x01,
62 HBA_FLAGS_PSCSI_MODE = 0x02,
63 };
64
65 /* struct se_lun->lun_status */
66 enum transport_lun_status_table {
67 TRANSPORT_LUN_STATUS_FREE = 0,
68 TRANSPORT_LUN_STATUS_ACTIVE = 1,
69 };
70
71 /* struct se_portal_group->se_tpg_type */
72 enum transport_tpg_type_table {
73 TRANSPORT_TPG_TYPE_NORMAL = 0,
74 TRANSPORT_TPG_TYPE_DISCOVERY = 1,
75 };
76
77 /* Used for generate timer flags */
78 enum timer_flags_table {
79 TF_RUNNING = 0x01,
80 TF_STOP = 0x02,
81 };
82
83 /* Special transport agnostic struct se_cmd->t_states */
84 enum transport_state_table {
85 TRANSPORT_NO_STATE = 0,
86 TRANSPORT_NEW_CMD = 1,
87 TRANSPORT_DEFERRED_CMD = 2,
88 TRANSPORT_WRITE_PENDING = 3,
89 TRANSPORT_PROCESS_WRITE = 4,
90 TRANSPORT_PROCESSING = 5,
91 TRANSPORT_COMPLETE_OK = 6,
92 TRANSPORT_COMPLETE_FAILURE = 7,
93 TRANSPORT_COMPLETE_TIMEOUT = 8,
94 TRANSPORT_PROCESS_TMR = 9,
95 TRANSPORT_TMR_COMPLETE = 10,
96 TRANSPORT_ISTATE_PROCESSING = 11,
97 TRANSPORT_ISTATE_PROCESSED = 12,
98 TRANSPORT_KILL = 13,
99 TRANSPORT_REMOVE = 14,
100 TRANSPORT_FREE = 15,
101 TRANSPORT_NEW_CMD_MAP = 16,
102 };
103
104 /* Used for struct se_cmd->se_cmd_flags */
105 enum se_cmd_flags_table {
106 SCF_SUPPORTED_SAM_OPCODE = 0x00000001,
107 SCF_TRANSPORT_TASK_SENSE = 0x00000002,
108 SCF_EMULATED_TASK_SENSE = 0x00000004,
109 SCF_SCSI_DATA_SG_IO_CDB = 0x00000008,
110 SCF_SCSI_CONTROL_SG_IO_CDB = 0x00000010,
111 SCF_SCSI_CONTROL_NONSG_IO_CDB = 0x00000020,
112 SCF_SCSI_NON_DATA_CDB = 0x00000040,
113 SCF_SCSI_CDB_EXCEPTION = 0x00000080,
114 SCF_SCSI_RESERVATION_CONFLICT = 0x00000100,
115 SCF_CMD_PASSTHROUGH_NOALLOC = 0x00000200,
116 SCF_SE_CMD_FAILED = 0x00000400,
117 SCF_SE_LUN_CMD = 0x00000800,
118 SCF_SE_ALLOW_EOO = 0x00001000,
119 SCF_SE_DISABLE_ONLINE_CHECK = 0x00002000,
120 SCF_SENT_CHECK_CONDITION = 0x00004000,
121 SCF_OVERFLOW_BIT = 0x00008000,
122 SCF_UNDERFLOW_BIT = 0x00010000,
123 SCF_SENT_DELAYED_TAS = 0x00020000,
124 SCF_ALUA_NON_OPTIMIZED = 0x00040000,
125 SCF_DELAYED_CMD_FROM_SAM_ATTR = 0x00080000,
126 SCF_PASSTHROUGH_SG_TO_MEM = 0x00100000,
127 SCF_PASSTHROUGH_CONTIG_TO_SG = 0x00200000,
128 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00400000,
129 SCF_EMULATE_SYNC_CACHE = 0x00800000,
130 SCF_EMULATE_CDB_ASYNC = 0x01000000,
131 SCF_EMULATE_SYNC_UNMAP = 0x02000000
132 };
133
134 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
135 enum transport_lunflags_table {
136 TRANSPORT_LUNFLAGS_NO_ACCESS = 0x00,
137 TRANSPORT_LUNFLAGS_INITIATOR_ACCESS = 0x01,
138 TRANSPORT_LUNFLAGS_READ_ONLY = 0x02,
139 TRANSPORT_LUNFLAGS_READ_WRITE = 0x04,
140 };
141
142 /* struct se_device->dev_status */
143 enum transport_device_status_table {
144 TRANSPORT_DEVICE_ACTIVATED = 0x01,
145 TRANSPORT_DEVICE_DEACTIVATED = 0x02,
146 TRANSPORT_DEVICE_QUEUE_FULL = 0x04,
147 TRANSPORT_DEVICE_SHUTDOWN = 0x08,
148 TRANSPORT_DEVICE_OFFLINE_ACTIVATED = 0x10,
149 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED = 0x20,
150 };
151
152 /*
153 * Used by transport_send_check_condition_and_sense() and se_cmd->scsi_sense_reason
154 * to signal which ASC/ASCQ sense payload should be built.
155 */
156 enum tcm_sense_reason_table {
157 TCM_NON_EXISTENT_LUN = 0x01,
158 TCM_UNSUPPORTED_SCSI_OPCODE = 0x02,
159 TCM_INCORRECT_AMOUNT_OF_DATA = 0x03,
160 TCM_UNEXPECTED_UNSOLICITED_DATA = 0x04,
161 TCM_SERVICE_CRC_ERROR = 0x05,
162 TCM_SNACK_REJECTED = 0x06,
163 TCM_SECTOR_COUNT_TOO_MANY = 0x07,
164 TCM_INVALID_CDB_FIELD = 0x08,
165 TCM_INVALID_PARAMETER_LIST = 0x09,
166 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = 0x0a,
167 TCM_UNKNOWN_MODE_PAGE = 0x0b,
168 TCM_WRITE_PROTECTED = 0x0c,
169 TCM_CHECK_CONDITION_ABORT_CMD = 0x0d,
170 TCM_CHECK_CONDITION_UNIT_ATTENTION = 0x0e,
171 TCM_CHECK_CONDITION_NOT_READY = 0x0f,
172 };
173
174 struct se_obj {
175 atomic_t obj_access_count;
176 } ____cacheline_aligned;
177
178 /*
179 * Used by TCM Core internally to signal if ALUA emulation is enabled or
180 * disabled, or running in with TCM/pSCSI passthrough mode
181 */
182 typedef enum {
183 SPC_ALUA_PASSTHROUGH,
184 SPC2_ALUA_DISABLED,
185 SPC3_ALUA_EMULATED
186 } t10_alua_index_t;
187
188 /*
189 * Used by TCM Core internally to signal if SAM Task Attribute emulation
190 * is enabled or disabled, or running in with TCM/pSCSI passthrough mode
191 */
192 typedef enum {
193 SAM_TASK_ATTR_PASSTHROUGH,
194 SAM_TASK_ATTR_UNTAGGED,
195 SAM_TASK_ATTR_EMULATED
196 } t10_task_attr_index_t;
197
198 struct se_cmd;
199
200 struct t10_alua {
201 t10_alua_index_t alua_type;
202 /* ALUA Target Port Group ID */
203 u16 alua_tg_pt_gps_counter;
204 u32 alua_tg_pt_gps_count;
205 spinlock_t tg_pt_gps_lock;
206 struct se_subsystem_dev *t10_sub_dev;
207 /* Used for default ALUA Target Port Group */
208 struct t10_alua_tg_pt_gp *default_tg_pt_gp;
209 /* Used for default ALUA Target Port Group ConfigFS group */
210 struct config_group alua_tg_pt_gps_group;
211 int (*alua_state_check)(struct se_cmd *, unsigned char *, u8 *);
212 struct list_head tg_pt_gps_list;
213 } ____cacheline_aligned;
214
215 struct t10_alua_lu_gp {
216 u16 lu_gp_id;
217 int lu_gp_valid_id;
218 u32 lu_gp_members;
219 atomic_t lu_gp_shutdown;
220 atomic_t lu_gp_ref_cnt;
221 spinlock_t lu_gp_lock;
222 struct config_group lu_gp_group;
223 struct list_head lu_gp_list;
224 struct list_head lu_gp_mem_list;
225 } ____cacheline_aligned;
226
227 struct t10_alua_lu_gp_member {
228 int lu_gp_assoc:1;
229 atomic_t lu_gp_mem_ref_cnt;
230 spinlock_t lu_gp_mem_lock;
231 struct t10_alua_lu_gp *lu_gp;
232 struct se_device *lu_gp_mem_dev;
233 struct list_head lu_gp_mem_list;
234 } ____cacheline_aligned;
235
236 struct t10_alua_tg_pt_gp {
237 u16 tg_pt_gp_id;
238 int tg_pt_gp_valid_id;
239 int tg_pt_gp_alua_access_status;
240 int tg_pt_gp_alua_access_type;
241 int tg_pt_gp_nonop_delay_msecs;
242 int tg_pt_gp_trans_delay_msecs;
243 int tg_pt_gp_pref;
244 int tg_pt_gp_write_metadata;
245 /* Used by struct t10_alua_tg_pt_gp->tg_pt_gp_md_buf_len */
246 #define ALUA_MD_BUF_LEN 1024
247 u32 tg_pt_gp_md_buf_len;
248 u32 tg_pt_gp_members;
249 atomic_t tg_pt_gp_alua_access_state;
250 atomic_t tg_pt_gp_ref_cnt;
251 spinlock_t tg_pt_gp_lock;
252 struct mutex tg_pt_gp_md_mutex;
253 struct se_subsystem_dev *tg_pt_gp_su_dev;
254 struct config_group tg_pt_gp_group;
255 struct list_head tg_pt_gp_list;
256 struct list_head tg_pt_gp_mem_list;
257 } ____cacheline_aligned;
258
259 struct t10_alua_tg_pt_gp_member {
260 int tg_pt_gp_assoc:1;
261 atomic_t tg_pt_gp_mem_ref_cnt;
262 spinlock_t tg_pt_gp_mem_lock;
263 struct t10_alua_tg_pt_gp *tg_pt_gp;
264 struct se_port *tg_pt;
265 struct list_head tg_pt_gp_mem_list;
266 } ____cacheline_aligned;
267
268 struct t10_vpd {
269 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
270 int protocol_identifier_set;
271 u32 protocol_identifier;
272 u32 device_identifier_code_set;
273 u32 association;
274 u32 device_identifier_type;
275 struct list_head vpd_list;
276 } ____cacheline_aligned;
277
278 struct t10_wwn {
279 unsigned char vendor[8];
280 unsigned char model[16];
281 unsigned char revision[4];
282 unsigned char unit_serial[INQUIRY_VPD_SERIAL_LEN];
283 spinlock_t t10_vpd_lock;
284 struct se_subsystem_dev *t10_sub_dev;
285 struct config_group t10_wwn_group;
286 struct list_head t10_vpd_list;
287 } ____cacheline_aligned;
288
289
290 /*
291 * Used by TCM Core internally to signal if >= SPC-3 peristent reservations
292 * emulation is enabled or disabled, or running in with TCM/pSCSI passthrough
293 * mode
294 */
295 typedef enum {
296 SPC_PASSTHROUGH,
297 SPC2_RESERVATIONS,
298 SPC3_PERSISTENT_RESERVATIONS
299 } t10_reservations_index_t;
300
301 struct t10_pr_registration {
302 /* Used for fabrics that contain WWN+ISID */
303 #define PR_REG_ISID_LEN 16
304 /* PR_REG_ISID_LEN + ',i,0x' */
305 #define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5)
306 char pr_reg_isid[PR_REG_ISID_LEN];
307 /* Used during APTPL metadata reading */
308 #define PR_APTPL_MAX_IPORT_LEN 256
309 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
310 /* Used during APTPL metadata reading */
311 #define PR_APTPL_MAX_TPORT_LEN 256
312 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
313 /* For writing out live meta data */
314 unsigned char *pr_aptpl_buf;
315 u16 pr_aptpl_rpti;
316 u16 pr_reg_tpgt;
317 /* Reservation effects all target ports */
318 int pr_reg_all_tg_pt;
319 /* Activate Persistence across Target Power Loss */
320 int pr_reg_aptpl;
321 int pr_res_holder;
322 int pr_res_type;
323 int pr_res_scope;
324 /* Used for fabric initiator WWPNs using a ISID */
325 int isid_present_at_reg:1;
326 u32 pr_res_mapped_lun;
327 u32 pr_aptpl_target_lun;
328 u32 pr_res_generation;
329 u64 pr_reg_bin_isid;
330 u64 pr_res_key;
331 atomic_t pr_res_holders;
332 struct se_node_acl *pr_reg_nacl;
333 struct se_dev_entry *pr_reg_deve;
334 struct se_lun *pr_reg_tg_pt_lun;
335 struct list_head pr_reg_list;
336 struct list_head pr_reg_abort_list;
337 struct list_head pr_reg_aptpl_list;
338 struct list_head pr_reg_atp_list;
339 struct list_head pr_reg_atp_mem_list;
340 } ____cacheline_aligned;
341
342 /*
343 * This set of function pointer ops is set based upon SPC3_PERSISTENT_RESERVATIONS,
344 * SPC2_RESERVATIONS or SPC_PASSTHROUGH in drivers/target/target_core_pr.c:
345 * core_setup_reservations()
346 */
347 struct t10_reservation_ops {
348 int (*t10_reservation_check)(struct se_cmd *, u32 *);
349 int (*t10_seq_non_holder)(struct se_cmd *, unsigned char *, u32);
350 int (*t10_pr_register)(struct se_cmd *);
351 int (*t10_pr_clear)(struct se_cmd *);
352 };
353
354 struct t10_reservation_template {
355 /* Reservation effects all target ports */
356 int pr_all_tg_pt;
357 /* Activate Persistence across Target Power Loss enabled
358 * for SCSI device */
359 int pr_aptpl_active;
360 /* Used by struct t10_reservation_template->pr_aptpl_buf_len */
361 #define PR_APTPL_BUF_LEN 8192
362 u32 pr_aptpl_buf_len;
363 u32 pr_generation;
364 t10_reservations_index_t res_type;
365 spinlock_t registration_lock;
366 spinlock_t aptpl_reg_lock;
367 /*
368 * This will always be set by one individual I_T Nexus.
369 * However with all_tg_pt=1, other I_T Nexus from the
370 * same initiator can access PR reg/res info on a different
371 * target port.
372 *
373 * There is also the 'All Registrants' case, where there is
374 * a single *pr_res_holder of the reservation, but all
375 * registrations are considered reservation holders.
376 */
377 struct se_node_acl *pr_res_holder;
378 struct list_head registration_list;
379 struct list_head aptpl_reg_list;
380 struct t10_reservation_ops pr_ops;
381 } ____cacheline_aligned;
382
383 struct se_queue_req {
384 int state;
385 void *cmd;
386 struct list_head qr_list;
387 } ____cacheline_aligned;
388
389 struct se_queue_obj {
390 atomic_t queue_cnt;
391 spinlock_t cmd_queue_lock;
392 struct list_head qobj_list;
393 wait_queue_head_t thread_wq;
394 } ____cacheline_aligned;
395
396 /*
397 * Used one per struct se_cmd to hold all extra struct se_task
398 * metadata. This structure is setup and allocated in
399 * drivers/target/target_core_transport.c:__transport_alloc_se_cmd()
400 */
401 struct se_transport_task {
402 unsigned char *t_task_cdb;
403 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
404 unsigned long long t_task_lba;
405 int t_tasks_failed;
406 int t_tasks_fua;
407 int t_tasks_bidi:1;
408 u32 t_task_cdbs;
409 u32 t_tasks_check;
410 u32 t_tasks_no;
411 u32 t_tasks_sectors;
412 u32 t_tasks_se_num;
413 u32 t_tasks_se_bidi_num;
414 u32 t_tasks_sg_chained_no;
415 atomic_t t_fe_count;
416 atomic_t t_se_count;
417 atomic_t t_task_cdbs_left;
418 atomic_t t_task_cdbs_ex_left;
419 atomic_t t_task_cdbs_timeout_left;
420 atomic_t t_task_cdbs_sent;
421 atomic_t t_transport_aborted;
422 atomic_t t_transport_active;
423 atomic_t t_transport_complete;
424 atomic_t t_transport_queue_active;
425 atomic_t t_transport_sent;
426 atomic_t t_transport_stop;
427 atomic_t t_transport_timeout;
428 atomic_t transport_dev_active;
429 atomic_t transport_lun_active;
430 atomic_t transport_lun_fe_stop;
431 atomic_t transport_lun_stop;
432 spinlock_t t_state_lock;
433 struct completion t_transport_stop_comp;
434 struct completion transport_lun_fe_stop_comp;
435 struct completion transport_lun_stop_comp;
436 struct scatterlist *t_tasks_sg_chained;
437 struct scatterlist t_tasks_sg_bounce;
438 void *t_task_buf;
439 /*
440 * Used for pre-registered fabric SGL passthrough WRITE and READ
441 * with the special SCF_PASSTHROUGH_CONTIG_TO_SG case for TCM_Loop
442 * and other HW target mode fabric modules.
443 */
444 struct scatterlist *t_task_pt_sgl;
445 struct list_head *t_mem_list;
446 /* Used for BIDI READ */
447 struct list_head *t_mem_bidi_list;
448 struct list_head t_task_list;
449 } ____cacheline_aligned;
450
451 struct se_task {
452 unsigned char task_sense;
453 struct scatterlist *task_sg;
454 struct scatterlist *task_sg_bidi;
455 u8 task_scsi_status;
456 u8 task_flags;
457 int task_error_status;
458 int task_state_flags;
459 int task_padded_sg:1;
460 unsigned long long task_lba;
461 u32 task_no;
462 u32 task_sectors;
463 u32 task_size;
464 u32 task_sg_num;
465 u32 task_sg_offset;
466 enum dma_data_direction task_data_direction;
467 struct se_cmd *task_se_cmd;
468 struct se_device *se_dev;
469 struct completion task_stop_comp;
470 atomic_t task_active;
471 atomic_t task_execute_queue;
472 atomic_t task_timeout;
473 atomic_t task_sent;
474 atomic_t task_stop;
475 atomic_t task_state_active;
476 struct timer_list task_timer;
477 struct se_device *se_obj_ptr;
478 struct list_head t_list;
479 struct list_head t_execute_list;
480 struct list_head t_state_list;
481 } ____cacheline_aligned;
482
483 #define TASK_CMD(task) ((struct se_cmd *)task->task_se_cmd)
484 #define TASK_DEV(task) ((struct se_device *)task->se_dev)
485
486 struct se_cmd {
487 /* SAM response code being sent to initiator */
488 u8 scsi_status;
489 u8 scsi_asc;
490 u8 scsi_ascq;
491 u8 scsi_sense_reason;
492 u16 scsi_sense_length;
493 /* Delay for ALUA Active/NonOptimized state access in milliseconds */
494 int alua_nonop_delay;
495 /* See include/linux/dma-mapping.h */
496 enum dma_data_direction data_direction;
497 /* For SAM Task Attribute */
498 int sam_task_attr;
499 /* Transport protocol dependent state, see transport_state_table */
500 enum transport_state_table t_state;
501 /* Transport protocol dependent state for out of order CmdSNs */
502 int deferred_t_state;
503 /* Transport specific error status */
504 int transport_error_status;
505 /* See se_cmd_flags_table */
506 u32 se_cmd_flags;
507 u32 se_ordered_id;
508 /* Total size in bytes associated with command */
509 u32 data_length;
510 /* SCSI Presented Data Transfer Length */
511 u32 cmd_spdtl;
512 u32 residual_count;
513 u32 orig_fe_lun;
514 /* Persistent Reservation key */
515 u64 pr_res_key;
516 atomic_t transport_sent;
517 /* Used for sense data */
518 void *sense_buffer;
519 struct list_head se_delayed_list;
520 struct list_head se_ordered_list;
521 struct list_head se_lun_list;
522 struct se_device *se_dev;
523 struct se_dev_entry *se_deve;
524 struct se_device *se_obj_ptr;
525 struct se_device *se_orig_obj_ptr;
526 struct se_lun *se_lun;
527 /* Only used for internal passthrough and legacy TCM fabric modules */
528 struct se_session *se_sess;
529 struct se_tmr_req *se_tmr_req;
530 /* t_task is setup to t_task_backstore in transport_init_se_cmd() */
531 struct se_transport_task *t_task;
532 struct se_transport_task t_task_backstore;
533 struct target_core_fabric_ops *se_tfo;
534 int (*transport_emulate_cdb)(struct se_cmd *);
535 void (*transport_split_cdb)(unsigned long long, u32 *, unsigned char *);
536 void (*transport_wait_for_tasks)(struct se_cmd *, int, int);
537 void (*transport_complete_callback)(struct se_cmd *);
538 } ____cacheline_aligned;
539
540 #define T_TASK(cmd) ((struct se_transport_task *)(cmd->t_task))
541 #define CMD_TFO(cmd) ((struct target_core_fabric_ops *)cmd->se_tfo)
542
543 struct se_tmr_req {
544 /* Task Management function to be preformed */
545 u8 function;
546 /* Task Management response to send */
547 u8 response;
548 int call_transport;
549 /* Reference to ITT that Task Mgmt should be preformed */
550 u32 ref_task_tag;
551 /* 64-bit encoded SAM LUN from $FABRIC_MOD TMR header */
552 u64 ref_task_lun;
553 void *fabric_tmr_ptr;
554 struct se_cmd *task_cmd;
555 struct se_cmd *ref_cmd;
556 struct se_device *tmr_dev;
557 struct se_lun *tmr_lun;
558 struct list_head tmr_list;
559 } ____cacheline_aligned;
560
561 struct se_ua {
562 u8 ua_asc;
563 u8 ua_ascq;
564 struct se_node_acl *ua_nacl;
565 struct list_head ua_dev_list;
566 struct list_head ua_nacl_list;
567 } ____cacheline_aligned;
568
569 struct se_node_acl {
570 char initiatorname[TRANSPORT_IQN_LEN];
571 /* Used to signal demo mode created ACL, disabled by default */
572 int dynamic_node_acl:1;
573 u32 queue_depth;
574 u32 acl_index;
575 u64 num_cmds;
576 u64 read_bytes;
577 u64 write_bytes;
578 spinlock_t stats_lock;
579 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
580 atomic_t acl_pr_ref_count;
581 /* Used for MIB access */
582 atomic_t mib_ref_count;
583 struct se_dev_entry *device_list;
584 struct se_session *nacl_sess;
585 struct se_portal_group *se_tpg;
586 spinlock_t device_list_lock;
587 spinlock_t nacl_sess_lock;
588 struct config_group acl_group;
589 struct config_group acl_attrib_group;
590 struct config_group acl_auth_group;
591 struct config_group acl_param_group;
592 struct config_group *acl_default_groups[4];
593 struct list_head acl_list;
594 struct list_head acl_sess_list;
595 } ____cacheline_aligned;
596
597 struct se_session {
598 /* Used for MIB access */
599 atomic_t mib_ref_count;
600 u64 sess_bin_isid;
601 struct se_node_acl *se_node_acl;
602 struct se_portal_group *se_tpg;
603 void *fabric_sess_ptr;
604 struct list_head sess_list;
605 struct list_head sess_acl_list;
606 } ____cacheline_aligned;
607
608 #define SE_SESS(cmd) ((struct se_session *)(cmd)->se_sess)
609 #define SE_NODE_ACL(sess) ((struct se_node_acl *)(sess)->se_node_acl)
610
611 struct se_device;
612 struct se_transform_info;
613 struct scatterlist;
614
615 struct se_lun_acl {
616 char initiatorname[TRANSPORT_IQN_LEN];
617 u32 mapped_lun;
618 struct se_node_acl *se_lun_nacl;
619 struct se_lun *se_lun;
620 struct list_head lacl_list;
621 struct config_group se_lun_group;
622 } ____cacheline_aligned;
623
624 struct se_dev_entry {
625 int def_pr_registered:1;
626 /* See transport_lunflags_table */
627 u32 lun_flags;
628 u32 deve_cmds;
629 u32 mapped_lun;
630 u32 average_bytes;
631 u32 last_byte_count;
632 u32 total_cmds;
633 u32 total_bytes;
634 u64 pr_res_key;
635 u64 creation_time;
636 u32 attach_count;
637 u64 read_bytes;
638 u64 write_bytes;
639 atomic_t ua_count;
640 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
641 atomic_t pr_ref_count;
642 struct se_lun_acl *se_lun_acl;
643 spinlock_t ua_lock;
644 struct se_lun *se_lun;
645 struct list_head alua_port_list;
646 struct list_head ua_list;
647 } ____cacheline_aligned;
648
649 struct se_dev_limits {
650 /* Max supported HW queue depth */
651 u32 hw_queue_depth;
652 /* Max supported virtual queue depth */
653 u32 queue_depth;
654 /* From include/linux/blkdev.h for the other HW/SW limits. */
655 struct queue_limits limits;
656 } ____cacheline_aligned;
657
658 struct se_dev_attrib {
659 int emulate_dpo;
660 int emulate_fua_write;
661 int emulate_fua_read;
662 int emulate_write_cache;
663 int emulate_ua_intlck_ctrl;
664 int emulate_tas;
665 int emulate_tpu;
666 int emulate_tpws;
667 int emulate_reservations;
668 int emulate_alua;
669 int enforce_pr_isids;
670 u32 hw_block_size;
671 u32 block_size;
672 u32 hw_max_sectors;
673 u32 max_sectors;
674 u32 optimal_sectors;
675 u32 hw_queue_depth;
676 u32 queue_depth;
677 u32 task_timeout;
678 u32 max_unmap_lba_count;
679 u32 max_unmap_block_desc_count;
680 u32 unmap_granularity;
681 u32 unmap_granularity_alignment;
682 struct se_subsystem_dev *da_sub_dev;
683 struct config_group da_group;
684 } ____cacheline_aligned;
685
686 struct se_subsystem_dev {
687 /* Used for struct se_subsystem_dev-->se_dev_alias, must be less than PAGE_SIZE */
688 #define SE_DEV_ALIAS_LEN 512
689 unsigned char se_dev_alias[SE_DEV_ALIAS_LEN];
690 /* Used for struct se_subsystem_dev->se_dev_udev_path[], must be less than PAGE_SIZE */
691 #define SE_UDEV_PATH_LEN 512
692 unsigned char se_dev_udev_path[SE_UDEV_PATH_LEN];
693 u32 su_dev_flags;
694 struct se_hba *se_dev_hba;
695 struct se_device *se_dev_ptr;
696 struct se_dev_attrib se_dev_attrib;
697 /* T10 Asymmetric Logical Unit Assignment for Target Ports */
698 struct t10_alua t10_alua;
699 /* T10 Inquiry and VPD WWN Information */
700 struct t10_wwn t10_wwn;
701 /* T10 SPC-2 + SPC-3 Reservations */
702 struct t10_reservation_template t10_reservation;
703 spinlock_t se_dev_lock;
704 void *se_dev_su_ptr;
705 struct list_head g_se_dev_list;
706 struct config_group se_dev_group;
707 /* For T10 Reservations */
708 struct config_group se_dev_pr_group;
709 } ____cacheline_aligned;
710
711 #define T10_ALUA(su_dev) (&(su_dev)->t10_alua)
712 #define T10_RES(su_dev) (&(su_dev)->t10_reservation)
713 #define T10_PR_OPS(su_dev) (&(su_dev)->t10_reservation.pr_ops)
714
715 struct se_device {
716 /* Set to 1 if thread is NOT sleeping on thread_sem */
717 u8 thread_active;
718 u8 dev_status_timer_flags;
719 /* RELATIVE TARGET PORT IDENTIFER Counter */
720 u16 dev_rpti_counter;
721 /* Used for SAM Task Attribute ordering */
722 u32 dev_cur_ordered_id;
723 u32 dev_flags;
724 u32 dev_port_count;
725 /* See transport_device_status_table */
726 u32 dev_status;
727 u32 dev_tcq_window_closed;
728 /* Physical device queue depth */
729 u32 queue_depth;
730 /* Used for SPC-2 reservations enforce of ISIDs */
731 u64 dev_res_bin_isid;
732 t10_task_attr_index_t dev_task_attr_type;
733 /* Pointer to transport specific device structure */
734 void *dev_ptr;
735 u32 dev_index;
736 u64 creation_time;
737 u32 num_resets;
738 u64 num_cmds;
739 u64 read_bytes;
740 u64 write_bytes;
741 spinlock_t stats_lock;
742 /* Active commands on this virtual SE device */
743 atomic_t active_cmds;
744 atomic_t simple_cmds;
745 atomic_t depth_left;
746 atomic_t dev_ordered_id;
747 atomic_t dev_tur_active;
748 atomic_t execute_tasks;
749 atomic_t dev_status_thr_count;
750 atomic_t dev_hoq_count;
751 atomic_t dev_ordered_sync;
752 struct se_obj dev_obj;
753 struct se_obj dev_access_obj;
754 struct se_obj dev_export_obj;
755 struct se_queue_obj *dev_queue_obj;
756 struct se_queue_obj *dev_status_queue_obj;
757 spinlock_t delayed_cmd_lock;
758 spinlock_t ordered_cmd_lock;
759 spinlock_t execute_task_lock;
760 spinlock_t state_task_lock;
761 spinlock_t dev_alua_lock;
762 spinlock_t dev_reservation_lock;
763 spinlock_t dev_state_lock;
764 spinlock_t dev_status_lock;
765 spinlock_t dev_status_thr_lock;
766 spinlock_t se_port_lock;
767 spinlock_t se_tmr_lock;
768 /* Used for legacy SPC-2 reservationsa */
769 struct se_node_acl *dev_reserved_node_acl;
770 /* Used for ALUA Logical Unit Group membership */
771 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
772 /* Used for SPC-3 Persistent Reservations */
773 struct t10_pr_registration *dev_pr_res_holder;
774 struct list_head dev_sep_list;
775 struct list_head dev_tmr_list;
776 struct timer_list dev_status_timer;
777 /* Pointer to descriptor for processing thread */
778 struct task_struct *process_thread;
779 pid_t process_thread_pid;
780 struct task_struct *dev_mgmt_thread;
781 struct list_head delayed_cmd_list;
782 struct list_head ordered_cmd_list;
783 struct list_head execute_task_list;
784 struct list_head state_task_list;
785 /* Pointer to associated SE HBA */
786 struct se_hba *se_hba;
787 struct se_subsystem_dev *se_sub_dev;
788 /* Pointer to template of function pointers for transport */
789 struct se_subsystem_api *transport;
790 /* Linked list for struct se_hba struct se_device list */
791 struct list_head dev_list;
792 /* Linked list for struct se_global->g_se_dev_list */
793 struct list_head g_se_dev_list;
794 } ____cacheline_aligned;
795
796 #define SE_DEV(cmd) ((struct se_device *)(cmd)->se_lun->lun_se_dev)
797 #define SU_DEV(dev) ((struct se_subsystem_dev *)(dev)->se_sub_dev)
798 #define DEV_ATTRIB(dev) (&(dev)->se_sub_dev->se_dev_attrib)
799 #define DEV_T10_WWN(dev) (&(dev)->se_sub_dev->t10_wwn)
800
801 struct se_hba {
802 u16 hba_tpgt;
803 u32 hba_id;
804 /* See hba_flags_table */
805 u32 hba_flags;
806 /* Virtual iSCSI devices attached. */
807 u32 dev_count;
808 u32 hba_index;
809 atomic_t dev_mib_access_count;
810 atomic_t load_balance_queue;
811 atomic_t left_queue_depth;
812 /* Maximum queue depth the HBA can handle. */
813 atomic_t max_queue_depth;
814 /* Pointer to transport specific host structure. */
815 void *hba_ptr;
816 /* Linked list for struct se_device */
817 struct list_head hba_dev_list;
818 struct list_head hba_list;
819 spinlock_t device_lock;
820 spinlock_t hba_queue_lock;
821 struct config_group hba_group;
822 struct mutex hba_access_mutex;
823 struct se_subsystem_api *transport;
824 } ____cacheline_aligned;
825
826 #define SE_HBA(d) ((struct se_hba *)(d)->se_hba)
827
828 struct se_lun {
829 /* See transport_lun_status_table */
830 enum transport_lun_status_table lun_status;
831 u32 lun_access;
832 u32 lun_flags;
833 u32 unpacked_lun;
834 atomic_t lun_acl_count;
835 spinlock_t lun_acl_lock;
836 spinlock_t lun_cmd_lock;
837 spinlock_t lun_sep_lock;
838 struct completion lun_shutdown_comp;
839 struct list_head lun_cmd_list;
840 struct list_head lun_acl_list;
841 struct se_device *lun_se_dev;
842 struct config_group lun_group;
843 struct se_port *lun_sep;
844 } ____cacheline_aligned;
845
846 #define SE_LUN(c) ((struct se_lun *)(c)->se_lun)
847
848 struct se_port {
849 /* RELATIVE TARGET PORT IDENTIFER */
850 u16 sep_rtpi;
851 int sep_tg_pt_secondary_stat;
852 int sep_tg_pt_secondary_write_md;
853 u32 sep_index;
854 struct scsi_port_stats sep_stats;
855 /* Used for ALUA Target Port Groups membership */
856 atomic_t sep_tg_pt_gp_active;
857 atomic_t sep_tg_pt_secondary_offline;
858 /* Used for PR ALL_TG_PT=1 */
859 atomic_t sep_tg_pt_ref_cnt;
860 spinlock_t sep_alua_lock;
861 struct mutex sep_tg_pt_md_mutex;
862 struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem;
863 struct se_lun *sep_lun;
864 struct se_portal_group *sep_tpg;
865 struct list_head sep_alua_list;
866 struct list_head sep_list;
867 } ____cacheline_aligned;
868
869 struct se_tpg_np {
870 struct config_group tpg_np_group;
871 } ____cacheline_aligned;
872
873 struct se_portal_group {
874 /* Type of target portal group, see transport_tpg_type_table */
875 enum transport_tpg_type_table se_tpg_type;
876 /* Number of ACLed Initiator Nodes for this TPG */
877 u32 num_node_acls;
878 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
879 atomic_t tpg_pr_ref_count;
880 /* Spinlock for adding/removing ACLed Nodes */
881 spinlock_t acl_node_lock;
882 /* Spinlock for adding/removing sessions */
883 spinlock_t session_lock;
884 spinlock_t tpg_lun_lock;
885 /* Pointer to $FABRIC_MOD portal group */
886 void *se_tpg_fabric_ptr;
887 struct list_head se_tpg_list;
888 /* linked list for initiator ACL list */
889 struct list_head acl_node_list;
890 struct se_lun *tpg_lun_list;
891 struct se_lun tpg_virt_lun0;
892 /* List of TCM sessions assoicated wth this TPG */
893 struct list_head tpg_sess_list;
894 /* Pointer to $FABRIC_MOD dependent code */
895 struct target_core_fabric_ops *se_tpg_tfo;
896 struct se_wwn *se_tpg_wwn;
897 struct config_group tpg_group;
898 struct config_group *tpg_default_groups[6];
899 struct config_group tpg_lun_group;
900 struct config_group tpg_np_group;
901 struct config_group tpg_acl_group;
902 struct config_group tpg_attrib_group;
903 struct config_group tpg_param_group;
904 } ____cacheline_aligned;
905
906 #define TPG_TFO(se_tpg) ((struct target_core_fabric_ops *)(se_tpg)->se_tpg_tfo)
907
908 struct se_wwn {
909 struct target_fabric_configfs *wwn_tf;
910 struct config_group wwn_group;
911 } ____cacheline_aligned;
912
913 struct se_global {
914 u16 alua_lu_gps_counter;
915 int g_sub_api_initialized;
916 u32 in_shutdown;
917 u32 alua_lu_gps_count;
918 u32 g_hba_id_counter;
919 struct config_group target_core_hbagroup;
920 struct config_group alua_group;
921 struct config_group alua_lu_gps_group;
922 struct list_head g_lu_gps_list;
923 struct list_head g_se_tpg_list;
924 struct list_head g_hba_list;
925 struct list_head g_se_dev_list;
926 struct se_hba *g_lun0_hba;
927 struct se_subsystem_dev *g_lun0_su_dev;
928 struct se_device *g_lun0_dev;
929 struct t10_alua_lu_gp *default_lu_gp;
930 spinlock_t g_device_lock;
931 spinlock_t hba_lock;
932 spinlock_t se_tpg_lock;
933 spinlock_t lu_gps_lock;
934 spinlock_t plugin_class_lock;
935 } ____cacheline_aligned;
936
937 #endif /* TARGET_CORE_BASE_H */
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