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mmc: Prevent 1.8V switch for SD hosts that don't support UHS modes.
[linux-2.6/cjktty.git] / include / target / target_core_base.h
blobaaccc5f5fc9f963d8fdee2a0c17b436948541f71
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
12 #define TARGET_CORE_MOD_VERSION "v4.1.0-rc2-ml"
13 #define TARGET_CORE_VERSION TARGET_CORE_MOD_VERSION
14
15 /* Maximum Number of LUNs per Target Portal Group */
16 /* Don't raise above 511 or REPORT_LUNS needs to handle >1 page */
17 #define TRANSPORT_MAX_LUNS_PER_TPG 256
18 /*
19 * By default we use 32-byte CDBs in TCM Core and subsystem plugin code.
20 *
21 * Note that both include/scsi/scsi_cmnd.h:MAX_COMMAND_SIZE and
22 * include/linux/blkdev.h:BLOCK_MAX_CDB as of v2.6.36-rc4 still use
23 * 16-byte CDBs by default and require an extra allocation for
24 * 32-byte CDBs to because of legacy issues.
25 *
26 * Within TCM Core there are no such legacy limitiations, so we go ahead
27 * use 32-byte CDBs by default and use include/scsi/scsi.h:scsi_command_size()
28 * within all TCM Core and subsystem plugin code.
29 */
30 #define TCM_MAX_COMMAND_SIZE 32
31 /*
32 * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
33 * defined 96, but the real limit is 252 (or 260 including the header)
34 */
35 #define TRANSPORT_SENSE_BUFFER SCSI_SENSE_BUFFERSIZE
36 /* Used by transport_send_check_condition_and_sense() */
37 #define SPC_SENSE_KEY_OFFSET 2
38 #define SPC_ADD_SENSE_LEN_OFFSET 7
39 #define SPC_ASC_KEY_OFFSET 12
40 #define SPC_ASCQ_KEY_OFFSET 13
41 #define TRANSPORT_IQN_LEN 224
42 /* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
43 #define LU_GROUP_NAME_BUF 256
44 /* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
45 #define TG_PT_GROUP_NAME_BUF 256
46 /* Used to parse VPD into struct t10_vpd */
47 #define VPD_TMP_BUF_SIZE 128
48 /* Used by transport_generic_cmd_sequencer() */
49 #define READ_BLOCK_LEN 6
50 #define READ_CAP_LEN 8
51 #define READ_POSITION_LEN 20
52 #define INQUIRY_LEN 36
53 /* Used by transport_get_inquiry_vpd_serial() */
54 #define INQUIRY_VPD_SERIAL_LEN 254
55 /* Used by transport_get_inquiry_vpd_device_ident() */
56 #define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN 254
57
58 /* Attempts before moving from SHORT to LONG */
59 #define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD 3
60 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT 3 /* In milliseconds */
61 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG 10 /* In milliseconds */
62
63 #define PYX_TRANSPORT_STATUS_INTERVAL 5 /* In seconds */
64
65 /*
66 * struct se_subsystem_dev->su_dev_flags
67 */
68 #define SDF_FIRMWARE_VPD_UNIT_SERIAL 0x00000001
69 #define SDF_EMULATED_VPD_UNIT_SERIAL 0x00000002
70 #define SDF_USING_UDEV_PATH 0x00000004
71 #define SDF_USING_ALIAS 0x00000008
72
73 /*
74 * struct se_device->dev_flags
75 */
76 #define DF_READ_ONLY 0x00000001
77 #define DF_SPC2_RESERVATIONS 0x00000002
78 #define DF_SPC2_RESERVATIONS_WITH_ISID 0x00000004
79
80 /* struct se_dev_attrib sanity values */
81 /* Default max_unmap_lba_count */
82 #define DA_MAX_UNMAP_LBA_COUNT 0
83 /* Default max_unmap_block_desc_count */
84 #define DA_MAX_UNMAP_BLOCK_DESC_COUNT 0
85 /* Default unmap_granularity */
86 #define DA_UNMAP_GRANULARITY_DEFAULT 0
87 /* Default unmap_granularity_alignment */
88 #define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT 0
89 /* Default max transfer length */
90 #define DA_FABRIC_MAX_SECTORS 8192
91 /* Emulation for Direct Page Out */
92 #define DA_EMULATE_DPO 0
93 /* Emulation for Forced Unit Access WRITEs */
94 #define DA_EMULATE_FUA_WRITE 1
95 /* Emulation for Forced Unit Access READs */
96 #define DA_EMULATE_FUA_READ 0
97 /* Emulation for WriteCache and SYNCHRONIZE_CACHE */
98 #define DA_EMULATE_WRITE_CACHE 0
99 /* Emulation for UNIT ATTENTION Interlock Control */
100 #define DA_EMULATE_UA_INTLLCK_CTRL 0
101 /* Emulation for TASK_ABORTED status (TAS) by default */
102 #define DA_EMULATE_TAS 1
103 /* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
104 #define DA_EMULATE_TPU 0
105 /*
106 * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
107 * block/blk-lib.c:blkdev_issue_discard()
108 */
109 #define DA_EMULATE_TPWS 0
110 /* No Emulation for PSCSI by default */
111 #define DA_EMULATE_RESERVATIONS 0
112 /* No Emulation for PSCSI by default */
113 #define DA_EMULATE_ALUA 0
114 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
115 #define DA_ENFORCE_PR_ISIDS 1
116 #define DA_STATUS_MAX_SECTORS_MIN 16
117 #define DA_STATUS_MAX_SECTORS_MAX 8192
118 /* By default don't report non-rotating (solid state) medium */
119 #define DA_IS_NONROT 0
120 /* Queue Algorithm Modifier default for restricted reordering in control mode page */
121 #define DA_EMULATE_REST_REORD 0
122
123 #define SE_INQUIRY_BUF 512
124 #define SE_MODE_PAGE_BUF 512
125
126 /* struct se_hba->hba_flags */
127 enum hba_flags_table {
128 HBA_FLAGS_INTERNAL_USE = 0x01,
129 HBA_FLAGS_PSCSI_MODE = 0x02,
130 };
131
132 /* struct se_lun->lun_status */
133 enum transport_lun_status_table {
134 TRANSPORT_LUN_STATUS_FREE = 0,
135 TRANSPORT_LUN_STATUS_ACTIVE = 1,
136 };
137
138 /* struct se_portal_group->se_tpg_type */
139 enum transport_tpg_type_table {
140 TRANSPORT_TPG_TYPE_NORMAL = 0,
141 TRANSPORT_TPG_TYPE_DISCOVERY = 1,
142 };
143
144 /* struct se_task->task_flags */
145 enum se_task_flags {
146 TF_ACTIVE = (1 << 0),
147 TF_SENT = (1 << 1),
148 TF_REQUEST_STOP = (1 << 2),
149 TF_HAS_SENSE = (1 << 3),
150 };
151
152 /* Special transport agnostic struct se_cmd->t_states */
153 enum transport_state_table {
154 TRANSPORT_NO_STATE = 0,
155 TRANSPORT_NEW_CMD = 1,
156 TRANSPORT_WRITE_PENDING = 3,
157 TRANSPORT_PROCESS_WRITE = 4,
158 TRANSPORT_PROCESSING = 5,
159 TRANSPORT_COMPLETE = 6,
160 TRANSPORT_PROCESS_TMR = 9,
161 TRANSPORT_ISTATE_PROCESSING = 11,
162 TRANSPORT_NEW_CMD_MAP = 16,
163 TRANSPORT_COMPLETE_QF_WP = 18,
164 TRANSPORT_COMPLETE_QF_OK = 19,
165 };
166
167 /* Used for struct se_cmd->se_cmd_flags */
168 enum se_cmd_flags_table {
169 SCF_SUPPORTED_SAM_OPCODE = 0x00000001,
170 SCF_TRANSPORT_TASK_SENSE = 0x00000002,
171 SCF_EMULATED_TASK_SENSE = 0x00000004,
172 SCF_SCSI_DATA_SG_IO_CDB = 0x00000008,
173 SCF_SCSI_CONTROL_SG_IO_CDB = 0x00000010,
174 SCF_SCSI_NON_DATA_CDB = 0x00000020,
175 SCF_SCSI_TMR_CDB = 0x00000040,
176 SCF_SCSI_CDB_EXCEPTION = 0x00000080,
177 SCF_SCSI_RESERVATION_CONFLICT = 0x00000100,
178 SCF_FUA = 0x00000200,
179 SCF_SE_LUN_CMD = 0x00000800,
180 SCF_SE_ALLOW_EOO = 0x00001000,
181 SCF_BIDI = 0x00002000,
182 SCF_SENT_CHECK_CONDITION = 0x00004000,
183 SCF_OVERFLOW_BIT = 0x00008000,
184 SCF_UNDERFLOW_BIT = 0x00010000,
185 SCF_SENT_DELAYED_TAS = 0x00020000,
186 SCF_ALUA_NON_OPTIMIZED = 0x00040000,
187 SCF_DELAYED_CMD_FROM_SAM_ATTR = 0x00080000,
188 SCF_UNUSED = 0x00100000,
189 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00200000,
190 SCF_ACK_KREF = 0x00400000,
191 };
192
193 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
194 enum transport_lunflags_table {
195 TRANSPORT_LUNFLAGS_NO_ACCESS = 0x00,
196 TRANSPORT_LUNFLAGS_INITIATOR_ACCESS = 0x01,
197 TRANSPORT_LUNFLAGS_READ_ONLY = 0x02,
198 TRANSPORT_LUNFLAGS_READ_WRITE = 0x04,
199 };
200
201 /* struct se_device->dev_status */
202 enum transport_device_status_table {
203 TRANSPORT_DEVICE_ACTIVATED = 0x01,
204 TRANSPORT_DEVICE_DEACTIVATED = 0x02,
205 TRANSPORT_DEVICE_QUEUE_FULL = 0x04,
206 TRANSPORT_DEVICE_SHUTDOWN = 0x08,
207 TRANSPORT_DEVICE_OFFLINE_ACTIVATED = 0x10,
208 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED = 0x20,
209 };
210
211 /*
212 * Used by transport_send_check_condition_and_sense() and se_cmd->scsi_sense_reason
213 * to signal which ASC/ASCQ sense payload should be built.
214 */
215 enum tcm_sense_reason_table {
216 TCM_NON_EXISTENT_LUN = 0x01,
217 TCM_UNSUPPORTED_SCSI_OPCODE = 0x02,
218 TCM_INCORRECT_AMOUNT_OF_DATA = 0x03,
219 TCM_UNEXPECTED_UNSOLICITED_DATA = 0x04,
220 TCM_SERVICE_CRC_ERROR = 0x05,
221 TCM_SNACK_REJECTED = 0x06,
222 TCM_SECTOR_COUNT_TOO_MANY = 0x07,
223 TCM_INVALID_CDB_FIELD = 0x08,
224 TCM_INVALID_PARAMETER_LIST = 0x09,
225 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = 0x0a,
226 TCM_UNKNOWN_MODE_PAGE = 0x0b,
227 TCM_WRITE_PROTECTED = 0x0c,
228 TCM_CHECK_CONDITION_ABORT_CMD = 0x0d,
229 TCM_CHECK_CONDITION_UNIT_ATTENTION = 0x0e,
230 TCM_CHECK_CONDITION_NOT_READY = 0x0f,
231 TCM_RESERVATION_CONFLICT = 0x10,
232 };
233
234 enum target_sc_flags_table {
235 TARGET_SCF_BIDI_OP = 0x01,
236 TARGET_SCF_ACK_KREF = 0x02,
237 };
238
239 /* fabric independent task management function values */
240 enum tcm_tmreq_table {
241 TMR_ABORT_TASK = 1,
242 TMR_ABORT_TASK_SET = 2,
243 TMR_CLEAR_ACA = 3,
244 TMR_CLEAR_TASK_SET = 4,
245 TMR_LUN_RESET = 5,
246 TMR_TARGET_WARM_RESET = 6,
247 TMR_TARGET_COLD_RESET = 7,
248 TMR_FABRIC_TMR = 255,
249 };
250
251 /* fabric independent task management response values */
252 enum tcm_tmrsp_table {
253 TMR_FUNCTION_COMPLETE = 0,
254 TMR_TASK_DOES_NOT_EXIST = 1,
255 TMR_LUN_DOES_NOT_EXIST = 2,
256 TMR_TASK_STILL_ALLEGIANT = 3,
257 TMR_TASK_FAILOVER_NOT_SUPPORTED = 4,
258 TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 5,
259 TMR_FUNCTION_AUTHORIZATION_FAILED = 6,
260 TMR_FUNCTION_REJECTED = 255,
261 };
262
263 struct se_obj {
264 atomic_t obj_access_count;
265 };
266
267 /*
268 * Used by TCM Core internally to signal if ALUA emulation is enabled or
269 * disabled, or running in with TCM/pSCSI passthrough mode
270 */
271 typedef enum {
272 SPC_ALUA_PASSTHROUGH,
273 SPC2_ALUA_DISABLED,
274 SPC3_ALUA_EMULATED
275 } t10_alua_index_t;
276
277 /*
278 * Used by TCM Core internally to signal if SAM Task Attribute emulation
279 * is enabled or disabled, or running in with TCM/pSCSI passthrough mode
280 */
281 typedef enum {
282 SAM_TASK_ATTR_PASSTHROUGH,
283 SAM_TASK_ATTR_UNTAGGED,
284 SAM_TASK_ATTR_EMULATED
285 } t10_task_attr_index_t;
286
287 /*
288 * Used for target SCSI statistics
289 */
290 typedef enum {
291 SCSI_INST_INDEX,
292 SCSI_DEVICE_INDEX,
293 SCSI_AUTH_INTR_INDEX,
294 SCSI_INDEX_TYPE_MAX
295 } scsi_index_t;
296
297 struct se_cmd;
298
299 struct t10_alua {
300 t10_alua_index_t alua_type;
301 /* ALUA Target Port Group ID */
302 u16 alua_tg_pt_gps_counter;
303 u32 alua_tg_pt_gps_count;
304 spinlock_t tg_pt_gps_lock;
305 struct se_subsystem_dev *t10_sub_dev;
306 /* Used for default ALUA Target Port Group */
307 struct t10_alua_tg_pt_gp *default_tg_pt_gp;
308 /* Used for default ALUA Target Port Group ConfigFS group */
309 struct config_group alua_tg_pt_gps_group;
310 int (*alua_state_check)(struct se_cmd *, unsigned char *, u8 *);
311 struct list_head tg_pt_gps_list;
312 };
313
314 struct t10_alua_lu_gp {
315 u16 lu_gp_id;
316 int lu_gp_valid_id;
317 u32 lu_gp_members;
318 atomic_t lu_gp_ref_cnt;
319 spinlock_t lu_gp_lock;
320 struct config_group lu_gp_group;
321 struct list_head lu_gp_node;
322 struct list_head lu_gp_mem_list;
323 };
324
325 struct t10_alua_lu_gp_member {
326 bool lu_gp_assoc;
327 atomic_t lu_gp_mem_ref_cnt;
328 spinlock_t lu_gp_mem_lock;
329 struct t10_alua_lu_gp *lu_gp;
330 struct se_device *lu_gp_mem_dev;
331 struct list_head lu_gp_mem_list;
332 };
333
334 struct t10_alua_tg_pt_gp {
335 u16 tg_pt_gp_id;
336 int tg_pt_gp_valid_id;
337 int tg_pt_gp_alua_access_status;
338 int tg_pt_gp_alua_access_type;
339 int tg_pt_gp_nonop_delay_msecs;
340 int tg_pt_gp_trans_delay_msecs;
341 int tg_pt_gp_pref;
342 int tg_pt_gp_write_metadata;
343 /* Used by struct t10_alua_tg_pt_gp->tg_pt_gp_md_buf_len */
344 #define ALUA_MD_BUF_LEN 1024
345 u32 tg_pt_gp_md_buf_len;
346 u32 tg_pt_gp_members;
347 atomic_t tg_pt_gp_alua_access_state;
348 atomic_t tg_pt_gp_ref_cnt;
349 spinlock_t tg_pt_gp_lock;
350 struct mutex tg_pt_gp_md_mutex;
351 struct se_subsystem_dev *tg_pt_gp_su_dev;
352 struct config_group tg_pt_gp_group;
353 struct list_head tg_pt_gp_list;
354 struct list_head tg_pt_gp_mem_list;
355 };
356
357 struct t10_alua_tg_pt_gp_member {
358 bool tg_pt_gp_assoc;
359 atomic_t tg_pt_gp_mem_ref_cnt;
360 spinlock_t tg_pt_gp_mem_lock;
361 struct t10_alua_tg_pt_gp *tg_pt_gp;
362 struct se_port *tg_pt;
363 struct list_head tg_pt_gp_mem_list;
364 };
365
366 struct t10_vpd {
367 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
368 int protocol_identifier_set;
369 u32 protocol_identifier;
370 u32 device_identifier_code_set;
371 u32 association;
372 u32 device_identifier_type;
373 struct list_head vpd_list;
374 };
375
376 struct t10_wwn {
377 char vendor[8];
378 char model[16];
379 char revision[4];
380 char unit_serial[INQUIRY_VPD_SERIAL_LEN];
381 spinlock_t t10_vpd_lock;
382 struct se_subsystem_dev *t10_sub_dev;
383 struct config_group t10_wwn_group;
384 struct list_head t10_vpd_list;
385 };
386
387
388 /*
389 * Used by TCM Core internally to signal if >= SPC-3 persistent reservations
390 * emulation is enabled or disabled, or running in with TCM/pSCSI passthrough
391 * mode
392 */
393 typedef enum {
394 SPC_PASSTHROUGH,
395 SPC2_RESERVATIONS,
396 SPC3_PERSISTENT_RESERVATIONS
397 } t10_reservations_index_t;
398
399 struct t10_pr_registration {
400 /* Used for fabrics that contain WWN+ISID */
401 #define PR_REG_ISID_LEN 16
402 /* PR_REG_ISID_LEN + ',i,0x' */
403 #define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5)
404 char pr_reg_isid[PR_REG_ISID_LEN];
405 /* Used during APTPL metadata reading */
406 #define PR_APTPL_MAX_IPORT_LEN 256
407 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
408 /* Used during APTPL metadata reading */
409 #define PR_APTPL_MAX_TPORT_LEN 256
410 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
411 /* For writing out live meta data */
412 unsigned char *pr_aptpl_buf;
413 u16 pr_aptpl_rpti;
414 u16 pr_reg_tpgt;
415 /* Reservation effects all target ports */
416 int pr_reg_all_tg_pt;
417 /* Activate Persistence across Target Power Loss */
418 int pr_reg_aptpl;
419 int pr_res_holder;
420 int pr_res_type;
421 int pr_res_scope;
422 /* Used for fabric initiator WWPNs using a ISID */
423 bool isid_present_at_reg;
424 u32 pr_res_mapped_lun;
425 u32 pr_aptpl_target_lun;
426 u32 pr_res_generation;
427 u64 pr_reg_bin_isid;
428 u64 pr_res_key;
429 atomic_t pr_res_holders;
430 struct se_node_acl *pr_reg_nacl;
431 struct se_dev_entry *pr_reg_deve;
432 struct se_lun *pr_reg_tg_pt_lun;
433 struct list_head pr_reg_list;
434 struct list_head pr_reg_abort_list;
435 struct list_head pr_reg_aptpl_list;
436 struct list_head pr_reg_atp_list;
437 struct list_head pr_reg_atp_mem_list;
438 };
439
440 /*
441 * This set of function pointer ops is set based upon SPC3_PERSISTENT_RESERVATIONS,
442 * SPC2_RESERVATIONS or SPC_PASSTHROUGH in drivers/target/target_core_pr.c:
443 * core_setup_reservations()
444 */
445 struct t10_reservation_ops {
446 int (*t10_reservation_check)(struct se_cmd *, u32 *);
447 int (*t10_seq_non_holder)(struct se_cmd *, unsigned char *, u32);
448 int (*t10_pr_register)(struct se_cmd *);
449 int (*t10_pr_clear)(struct se_cmd *);
450 };
451
452 struct t10_reservation {
453 /* Reservation effects all target ports */
454 int pr_all_tg_pt;
455 /* Activate Persistence across Target Power Loss enabled
456 * for SCSI device */
457 int pr_aptpl_active;
458 /* Used by struct t10_reservation->pr_aptpl_buf_len */
459 #define PR_APTPL_BUF_LEN 8192
460 u32 pr_aptpl_buf_len;
461 u32 pr_generation;
462 t10_reservations_index_t res_type;
463 spinlock_t registration_lock;
464 spinlock_t aptpl_reg_lock;
465 /*
466 * This will always be set by one individual I_T Nexus.
467 * However with all_tg_pt=1, other I_T Nexus from the
468 * same initiator can access PR reg/res info on a different
469 * target port.
470 *
471 * There is also the 'All Registrants' case, where there is
472 * a single *pr_res_holder of the reservation, but all
473 * registrations are considered reservation holders.
474 */
475 struct se_node_acl *pr_res_holder;
476 struct list_head registration_list;
477 struct list_head aptpl_reg_list;
478 struct t10_reservation_ops pr_ops;
479 };
480
481 struct se_queue_obj {
482 atomic_t queue_cnt;
483 spinlock_t cmd_queue_lock;
484 struct list_head qobj_list;
485 wait_queue_head_t thread_wq;
486 };
487
488 struct se_task {
489 unsigned long long task_lba;
490 u32 task_sectors;
491 u32 task_size;
492 struct se_cmd *task_se_cmd;
493 struct scatterlist *task_sg;
494 u32 task_sg_nents;
495 u16 task_flags;
496 u8 task_scsi_status;
497 enum dma_data_direction task_data_direction;
498 struct list_head t_list;
499 struct list_head t_execute_list;
500 struct list_head t_state_list;
501 bool t_state_active;
502 struct completion task_stop_comp;
503 };
504
505 struct se_tmr_req {
506 /* Task Management function to be performed */
507 u8 function;
508 /* Task Management response to send */
509 u8 response;
510 int call_transport;
511 /* Reference to ITT that Task Mgmt should be performed */
512 u32 ref_task_tag;
513 /* 64-bit encoded SAM LUN from $FABRIC_MOD TMR header */
514 u64 ref_task_lun;
515 void *fabric_tmr_ptr;
516 struct se_cmd *task_cmd;
517 struct se_cmd *ref_cmd;
518 struct se_device *tmr_dev;
519 struct se_lun *tmr_lun;
520 struct list_head tmr_list;
521 };
522
523 struct se_cmd {
524 /* SAM response code being sent to initiator */
525 u8 scsi_status;
526 u8 scsi_asc;
527 u8 scsi_ascq;
528 u8 scsi_sense_reason;
529 u16 scsi_sense_length;
530 /* Delay for ALUA Active/NonOptimized state access in milliseconds */
531 int alua_nonop_delay;
532 /* See include/linux/dma-mapping.h */
533 enum dma_data_direction data_direction;
534 /* For SAM Task Attribute */
535 int sam_task_attr;
536 /* Transport protocol dependent state, see transport_state_table */
537 enum transport_state_table t_state;
538 /* Used to signal cmd->se_tfo->check_release_cmd() usage per cmd */
539 unsigned check_release:1;
540 unsigned cmd_wait_set:1;
541 /* See se_cmd_flags_table */
542 u32 se_cmd_flags;
543 u32 se_ordered_id;
544 /* Total size in bytes associated with command */
545 u32 data_length;
546 /* SCSI Presented Data Transfer Length */
547 u32 cmd_spdtl;
548 u32 residual_count;
549 u32 orig_fe_lun;
550 /* Persistent Reservation key */
551 u64 pr_res_key;
552 /* Used for sense data */
553 void *sense_buffer;
554 struct list_head se_delayed_node;
555 struct list_head se_lun_node;
556 struct list_head se_qf_node;
557 struct se_device *se_dev;
558 struct se_dev_entry *se_deve;
559 struct se_lun *se_lun;
560 /* Only used for internal passthrough and legacy TCM fabric modules */
561 struct se_session *se_sess;
562 struct se_tmr_req *se_tmr_req;
563 struct list_head se_queue_node;
564 struct list_head se_cmd_list;
565 struct completion cmd_wait_comp;
566 struct kref cmd_kref;
567 struct target_core_fabric_ops *se_tfo;
568 int (*execute_task)(struct se_task *);
569 void (*transport_complete_callback)(struct se_cmd *);
570
571 unsigned char *t_task_cdb;
572 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
573 unsigned long long t_task_lba;
574 u32 t_tasks_sg_chained_no;
575 atomic_t t_fe_count;
576 atomic_t t_se_count;
577 atomic_t t_task_cdbs_left;
578 atomic_t t_task_cdbs_ex_left;
579 atomic_t t_task_cdbs_sent;
580 unsigned int transport_state;
581 #define CMD_T_ABORTED (1 << 0)
582 #define CMD_T_ACTIVE (1 << 1)
583 #define CMD_T_COMPLETE (1 << 2)
584 #define CMD_T_QUEUED (1 << 3)
585 #define CMD_T_SENT (1 << 4)
586 #define CMD_T_STOP (1 << 5)
587 #define CMD_T_FAILED (1 << 6)
588 #define CMD_T_LUN_STOP (1 << 7)
589 #define CMD_T_LUN_FE_STOP (1 << 8)
590 #define CMD_T_DEV_ACTIVE (1 << 9)
591 spinlock_t t_state_lock;
592 struct completion t_transport_stop_comp;
593 struct completion transport_lun_fe_stop_comp;
594 struct completion transport_lun_stop_comp;
595 struct scatterlist *t_tasks_sg_chained;
596
597 struct work_struct work;
598
599 struct scatterlist *t_data_sg;
600 unsigned int t_data_nents;
601 void *t_data_vmap;
602 struct scatterlist *t_bidi_data_sg;
603 unsigned int t_bidi_data_nents;
604
605 /* Used for BIDI READ */
606 struct list_head t_task_list;
607 u32 t_task_list_num;
608
609 };
610
611 struct se_ua {
612 u8 ua_asc;
613 u8 ua_ascq;
614 struct se_node_acl *ua_nacl;
615 struct list_head ua_dev_list;
616 struct list_head ua_nacl_list;
617 };
618
619 struct se_node_acl {
620 char initiatorname[TRANSPORT_IQN_LEN];
621 /* Used to signal demo mode created ACL, disabled by default */
622 bool dynamic_node_acl;
623 bool acl_stop:1;
624 u32 queue_depth;
625 u32 acl_index;
626 u64 num_cmds;
627 u64 read_bytes;
628 u64 write_bytes;
629 spinlock_t stats_lock;
630 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
631 atomic_t acl_pr_ref_count;
632 struct se_dev_entry **device_list;
633 struct se_session *nacl_sess;
634 struct se_portal_group *se_tpg;
635 spinlock_t device_list_lock;
636 spinlock_t nacl_sess_lock;
637 struct config_group acl_group;
638 struct config_group acl_attrib_group;
639 struct config_group acl_auth_group;
640 struct config_group acl_param_group;
641 struct config_group acl_fabric_stat_group;
642 struct config_group *acl_default_groups[5];
643 struct list_head acl_list;
644 struct list_head acl_sess_list;
645 struct completion acl_free_comp;
646 struct kref acl_kref;
647 };
648
649 struct se_session {
650 unsigned sess_tearing_down:1;
651 u64 sess_bin_isid;
652 struct se_node_acl *se_node_acl;
653 struct se_portal_group *se_tpg;
654 void *fabric_sess_ptr;
655 struct list_head sess_list;
656 struct list_head sess_acl_list;
657 struct list_head sess_cmd_list;
658 struct list_head sess_wait_list;
659 spinlock_t sess_cmd_lock;
660 struct kref sess_kref;
661 };
662
663 struct se_device;
664 struct se_transform_info;
665 struct scatterlist;
666
667 struct se_ml_stat_grps {
668 struct config_group stat_group;
669 struct config_group scsi_auth_intr_group;
670 struct config_group scsi_att_intr_port_group;
671 };
672
673 struct se_lun_acl {
674 char initiatorname[TRANSPORT_IQN_LEN];
675 u32 mapped_lun;
676 struct se_node_acl *se_lun_nacl;
677 struct se_lun *se_lun;
678 struct list_head lacl_list;
679 struct config_group se_lun_group;
680 struct se_ml_stat_grps ml_stat_grps;
681 };
682
683 struct se_dev_entry {
684 bool def_pr_registered;
685 /* See transport_lunflags_table */
686 u32 lun_flags;
687 u32 deve_cmds;
688 u32 mapped_lun;
689 u32 average_bytes;
690 u32 last_byte_count;
691 u32 total_cmds;
692 u32 total_bytes;
693 u64 pr_res_key;
694 u64 creation_time;
695 u32 attach_count;
696 u64 read_bytes;
697 u64 write_bytes;
698 atomic_t ua_count;
699 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
700 atomic_t pr_ref_count;
701 struct se_lun_acl *se_lun_acl;
702 spinlock_t ua_lock;
703 struct se_lun *se_lun;
704 struct list_head alua_port_list;
705 struct list_head ua_list;
706 };
707
708 struct se_dev_limits {
709 /* Max supported HW queue depth */
710 u32 hw_queue_depth;
711 /* Max supported virtual queue depth */
712 u32 queue_depth;
713 /* From include/linux/blkdev.h for the other HW/SW limits. */
714 struct queue_limits limits;
715 };
716
717 struct se_dev_attrib {
718 int emulate_dpo;
719 int emulate_fua_write;
720 int emulate_fua_read;
721 int emulate_write_cache;
722 int emulate_ua_intlck_ctrl;
723 int emulate_tas;
724 int emulate_tpu;
725 int emulate_tpws;
726 int emulate_reservations;
727 int emulate_alua;
728 int enforce_pr_isids;
729 int is_nonrot;
730 int emulate_rest_reord;
731 u32 hw_block_size;
732 u32 block_size;
733 u32 hw_max_sectors;
734 u32 max_sectors;
735 u32 fabric_max_sectors;
736 u32 optimal_sectors;
737 u32 hw_queue_depth;
738 u32 queue_depth;
739 u32 max_unmap_lba_count;
740 u32 max_unmap_block_desc_count;
741 u32 unmap_granularity;
742 u32 unmap_granularity_alignment;
743 struct se_subsystem_dev *da_sub_dev;
744 struct config_group da_group;
745 };
746
747 struct se_dev_stat_grps {
748 struct config_group stat_group;
749 struct config_group scsi_dev_group;
750 struct config_group scsi_tgt_dev_group;
751 struct config_group scsi_lu_group;
752 };
753
754 struct se_subsystem_dev {
755 /* Used for struct se_subsystem_dev-->se_dev_alias, must be less than PAGE_SIZE */
756 #define SE_DEV_ALIAS_LEN 512
757 unsigned char se_dev_alias[SE_DEV_ALIAS_LEN];
758 /* Used for struct se_subsystem_dev->se_dev_udev_path[], must be less than PAGE_SIZE */
759 #define SE_UDEV_PATH_LEN 512
760 unsigned char se_dev_udev_path[SE_UDEV_PATH_LEN];
761 u32 su_dev_flags;
762 struct se_hba *se_dev_hba;
763 struct se_device *se_dev_ptr;
764 struct se_dev_attrib se_dev_attrib;
765 /* T10 Asymmetric Logical Unit Assignment for Target Ports */
766 struct t10_alua t10_alua;
767 /* T10 Inquiry and VPD WWN Information */
768 struct t10_wwn t10_wwn;
769 /* T10 SPC-2 + SPC-3 Reservations */
770 struct t10_reservation t10_pr;
771 spinlock_t se_dev_lock;
772 void *se_dev_su_ptr;
773 struct config_group se_dev_group;
774 /* For T10 Reservations */
775 struct config_group se_dev_pr_group;
776 /* For target_core_stat.c groups */
777 struct se_dev_stat_grps dev_stat_grps;
778 };
779
780 struct se_device {
781 /* RELATIVE TARGET PORT IDENTIFER Counter */
782 u16 dev_rpti_counter;
783 /* Used for SAM Task Attribute ordering */
784 u32 dev_cur_ordered_id;
785 u32 dev_flags;
786 u32 dev_port_count;
787 /* See transport_device_status_table */
788 u32 dev_status;
789 /* Physical device queue depth */
790 u32 queue_depth;
791 /* Used for SPC-2 reservations enforce of ISIDs */
792 u64 dev_res_bin_isid;
793 t10_task_attr_index_t dev_task_attr_type;
794 /* Pointer to transport specific device structure */
795 void *dev_ptr;
796 u32 dev_index;
797 u64 creation_time;
798 u32 num_resets;
799 u64 num_cmds;
800 u64 read_bytes;
801 u64 write_bytes;
802 spinlock_t stats_lock;
803 /* Active commands on this virtual SE device */
804 atomic_t simple_cmds;
805 atomic_t dev_ordered_id;
806 atomic_t execute_tasks;
807 atomic_t dev_ordered_sync;
808 atomic_t dev_qf_count;
809 struct se_obj dev_obj;
810 struct se_obj dev_access_obj;
811 struct se_obj dev_export_obj;
812 struct se_queue_obj dev_queue_obj;
813 spinlock_t delayed_cmd_lock;
814 spinlock_t execute_task_lock;
815 spinlock_t dev_reservation_lock;
816 spinlock_t dev_status_lock;
817 spinlock_t se_port_lock;
818 spinlock_t se_tmr_lock;
819 spinlock_t qf_cmd_lock;
820 /* Used for legacy SPC-2 reservationsa */
821 struct se_node_acl *dev_reserved_node_acl;
822 /* Used for ALUA Logical Unit Group membership */
823 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
824 /* Used for SPC-3 Persistent Reservations */
825 struct t10_pr_registration *dev_pr_res_holder;
826 struct list_head dev_sep_list;
827 struct list_head dev_tmr_list;
828 /* Pointer to descriptor for processing thread */
829 struct task_struct *process_thread;
830 struct work_struct qf_work_queue;
831 struct list_head delayed_cmd_list;
832 struct list_head execute_task_list;
833 struct list_head state_task_list;
834 struct list_head qf_cmd_list;
835 /* Pointer to associated SE HBA */
836 struct se_hba *se_hba;
837 struct se_subsystem_dev *se_sub_dev;
838 /* Pointer to template of function pointers for transport */
839 struct se_subsystem_api *transport;
840 /* Linked list for struct se_hba struct se_device list */
841 struct list_head dev_list;
842 };
843
844 struct se_hba {
845 u16 hba_tpgt;
846 u32 hba_id;
847 /* See hba_flags_table */
848 u32 hba_flags;
849 /* Virtual iSCSI devices attached. */
850 u32 dev_count;
851 u32 hba_index;
852 /* Pointer to transport specific host structure. */
853 void *hba_ptr;
854 /* Linked list for struct se_device */
855 struct list_head hba_dev_list;
856 struct list_head hba_node;
857 spinlock_t device_lock;
858 struct config_group hba_group;
859 struct mutex hba_access_mutex;
860 struct se_subsystem_api *transport;
861 };
862
863 struct se_port_stat_grps {
864 struct config_group stat_group;
865 struct config_group scsi_port_group;
866 struct config_group scsi_tgt_port_group;
867 struct config_group scsi_transport_group;
868 };
869
870 struct se_lun {
871 /* See transport_lun_status_table */
872 enum transport_lun_status_table lun_status;
873 u32 lun_access;
874 u32 lun_flags;
875 u32 unpacked_lun;
876 atomic_t lun_acl_count;
877 spinlock_t lun_acl_lock;
878 spinlock_t lun_cmd_lock;
879 spinlock_t lun_sep_lock;
880 struct completion lun_shutdown_comp;
881 struct list_head lun_cmd_list;
882 struct list_head lun_acl_list;
883 struct se_device *lun_se_dev;
884 struct se_port *lun_sep;
885 struct config_group lun_group;
886 struct se_port_stat_grps port_stat_grps;
887 };
888
889 struct scsi_port_stats {
890 u64 cmd_pdus;
891 u64 tx_data_octets;
892 u64 rx_data_octets;
893 };
894
895 struct se_port {
896 /* RELATIVE TARGET PORT IDENTIFER */
897 u16 sep_rtpi;
898 int sep_tg_pt_secondary_stat;
899 int sep_tg_pt_secondary_write_md;
900 u32 sep_index;
901 struct scsi_port_stats sep_stats;
902 /* Used for ALUA Target Port Groups membership */
903 atomic_t sep_tg_pt_secondary_offline;
904 /* Used for PR ALL_TG_PT=1 */
905 atomic_t sep_tg_pt_ref_cnt;
906 spinlock_t sep_alua_lock;
907 struct mutex sep_tg_pt_md_mutex;
908 struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem;
909 struct se_lun *sep_lun;
910 struct se_portal_group *sep_tpg;
911 struct list_head sep_alua_list;
912 struct list_head sep_list;
913 };
914
915 struct se_tpg_np {
916 struct se_portal_group *tpg_np_parent;
917 struct config_group tpg_np_group;
918 };
919
920 struct se_portal_group {
921 /* Type of target portal group, see transport_tpg_type_table */
922 enum transport_tpg_type_table se_tpg_type;
923 /* Number of ACLed Initiator Nodes for this TPG */
924 u32 num_node_acls;
925 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
926 atomic_t tpg_pr_ref_count;
927 /* Spinlock for adding/removing ACLed Nodes */
928 spinlock_t acl_node_lock;
929 /* Spinlock for adding/removing sessions */
930 spinlock_t session_lock;
931 spinlock_t tpg_lun_lock;
932 /* Pointer to $FABRIC_MOD portal group */
933 void *se_tpg_fabric_ptr;
934 struct list_head se_tpg_node;
935 /* linked list for initiator ACL list */
936 struct list_head acl_node_list;
937 struct se_lun **tpg_lun_list;
938 struct se_lun tpg_virt_lun0;
939 /* List of TCM sessions associated wth this TPG */
940 struct list_head tpg_sess_list;
941 /* Pointer to $FABRIC_MOD dependent code */
942 struct target_core_fabric_ops *se_tpg_tfo;
943 struct se_wwn *se_tpg_wwn;
944 struct config_group tpg_group;
945 struct config_group *tpg_default_groups[6];
946 struct config_group tpg_lun_group;
947 struct config_group tpg_np_group;
948 struct config_group tpg_acl_group;
949 struct config_group tpg_attrib_group;
950 struct config_group tpg_param_group;
951 };
952
953 struct se_wwn {
954 struct target_fabric_configfs *wwn_tf;
955 struct config_group wwn_group;
956 struct config_group *wwn_default_groups[2];
957 struct config_group fabric_stat_group;
958 };
959
960 #endif /* TARGET_CORE_BASE_H */
CJK support for tty framebuffer vt