2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2003 Silicon Graphics International Corp.
5 * Copyright (c) 2014-2015 Alexander Motin <mav@FreeBSD.org>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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12 * notice, this list of conditions, and the following disclaimer,
13 * without modification.
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15 * substantially similar to the "NO WARRANTY" disclaimer below
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17 * including a substantially similar Disclaimer requirement for further
18 * binary redistribution.
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33 * $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_io.h#5 $
37 * CAM Target Layer data movement structures/interface.
39 * Author: Ken Merry <ken@FreeBSD.org>
49 #define CTL_MAX_CDBLEN 32
51 * Uncomment this next line to enable printing out times for I/Os
52 * that take longer than CTL_TIME_IO_SECS seconds to get to the datamove
57 #define CTL_TIME_IO_DEFAULT_SECS 90
61 * Uncomment this next line to enable the CTL I/O delay feature. You
62 * can delay I/O at two different points -- datamove and done. This is
63 * useful for diagnosing abort conditions (for hosts that send an abort on a
64 * timeout), and for determining how long a host's timeout is.
66 //#define CTL_IO_DELAY
69 CTL_STATUS_NONE, /* No status */
70 CTL_SUCCESS, /* Transaction completed successfully */
71 CTL_CMD_TIMEOUT, /* Command timed out, shouldn't happen here */
72 CTL_SEL_TIMEOUT, /* Selection timeout, shouldn't happen here */
73 CTL_ERROR, /* General CTL error XXX expand on this? */
74 CTL_SCSI_ERROR, /* SCSI error, look at status byte/sense data */
75 CTL_CMD_ABORTED, /* Command aborted, don't return status */
76 CTL_STATUS_MASK = 0xfff,/* Mask off any status flags */
77 CTL_AUTOSENSE = 0x1000 /* Autosense performed */
81 * WARNING: Keep the data in/out/none flags where they are. They're used
82 * in conjunction with ctl_cmd_flags. See comment above ctl_cmd_flags
83 * definition in ctl_private.h.
86 CTL_FLAG_NONE = 0x00000000, /* no flags */
87 CTL_FLAG_DATA_IN = 0x00000001, /* DATA IN */
88 CTL_FLAG_DATA_OUT = 0x00000002, /* DATA OUT */
89 CTL_FLAG_DATA_NONE = 0x00000003, /* no data */
90 CTL_FLAG_DATA_MASK = 0x00000003,
91 CTL_FLAG_DO_AUTOSENSE = 0x00000020, /* grab sense info */
92 CTL_FLAG_USER_REQ = 0x00000040, /* request came from userland */
93 CTL_FLAG_ALLOCATED = 0x00000100, /* data space allocated */
94 CTL_FLAG_ABORT_STATUS = 0x00000400, /* return TASK ABORTED status */
95 CTL_FLAG_ABORT = 0x00000800, /* this I/O should be aborted */
96 CTL_FLAG_DMA_INPROG = 0x00001000, /* DMA in progress */
97 CTL_FLAG_DELAY_DONE = 0x00004000, /* delay injection done */
98 CTL_FLAG_INT_COPY = 0x00008000, /* internal copy, no done call*/
99 CTL_FLAG_SENT_2OTHER_SC = 0x00010000,
100 CTL_FLAG_FROM_OTHER_SC = 0x00020000,
101 CTL_FLAG_IS_WAS_ON_RTR = 0x00040000, /* Don't rerun cmd on failover*/
102 CTL_FLAG_BUS_ADDR = 0x00080000, /* ctl_sglist contains BUS
103 addresses, not virtual ones*/
104 CTL_FLAG_IO_CONT = 0x00100000, /* Continue I/O instead of
107 CTL_FLAG_ALREADY_DONE = 0x00200000 /* I/O already completed */
109 CTL_FLAG_NO_DATAMOVE = 0x00400000,
110 CTL_FLAG_DMA_QUEUED = 0x00800000, /* DMA queued but not started*/
111 CTL_FLAG_STATUS_QUEUED = 0x01000000, /* Status queued but not sent*/
113 CTL_FLAG_FAILOVER = 0x04000000, /* Killed by a failover */
114 CTL_FLAG_IO_ACTIVE = 0x08000000, /* I/O active on this SC */
115 CTL_FLAG_STATUS_SENT = 0x10000000, /* Status sent by datamove */
116 CTL_FLAG_SERSEQ_DONE = 0x20000000 /* All storage I/O started */
124 struct ctl_lba_len_flags {
128 #define CTL_LLF_FUA 0x04000000
129 #define CTL_LLF_DPO 0x08000000
130 #define CTL_LLF_READ 0x10000000
131 #define CTL_LLF_WRITE 0x20000000
132 #define CTL_LLF_VERIFY 0x40000000
133 #define CTL_LLF_COMPARE 0x80000000
136 struct ctl_ptr_len_flags {
143 uint8_t bytes[sizeof(uint64_t) * 2];
145 uint64_t integers[2];
151 * Number of CTL private areas.
153 #define CTL_NUM_PRIV 6
156 * Which private area are we using for a particular piece of data?
158 #define CTL_PRIV_LUN 0 /* CTL LUN pointer goes here */
159 #define CTL_PRIV_LBA_LEN 1 /* Decoded LBA/len for read/write*/
160 #define CTL_PRIV_MODEPAGE 1 /* Modepage info for config write */
161 #define CTL_PRIV_BACKEND 2 /* Reserved for block, RAIDCore */
162 #define CTL_PRIV_BACKEND_LUN 3 /* Backend LUN pointer */
163 #define CTL_PRIV_FRONTEND 4 /* Frontend storage */
164 #define CTL_PRIV_FRONTEND2 5 /* Another frontend storage */
166 #define CTL_LUN(io) ((io)->io_hdr.ctl_private[CTL_PRIV_LUN].ptrs[0])
167 #define CTL_SOFTC(io) ((io)->io_hdr.ctl_private[CTL_PRIV_LUN].ptrs[1])
168 #define CTL_BACKEND_LUN(io) ((io)->io_hdr.ctl_private[CTL_PRIV_BACKEND_LUN].ptrs[0])
169 #define CTL_PORT(io) (((struct ctl_softc *)CTL_SOFTC(io))-> \
170 ctl_ports[(io)->io_hdr.nexus.targ_port])
173 * These are used only on Originating SC in XFER mode, where requests don't
174 * ever reach backends, so we can reuse backend's private storage.
176 #define CTL_RSGL(io) ((io)->io_hdr.ctl_private[CTL_PRIV_BACKEND].ptrs[0])
177 #define CTL_LSGL(io) ((io)->io_hdr.ctl_private[CTL_PRIV_BACKEND].ptrs[1])
178 #define CTL_RSGLT(io) ((struct ctl_sg_entry *)CTL_RSGL(io))
179 #define CTL_LSGLT(io) ((struct ctl_sg_entry *)CTL_LSGL(io))
181 #define CTL_INVALID_PORTNAME 0xFF
182 #define CTL_UNMAPPED_IID 0xFF
184 struct ctl_sg_entry {
196 uint32_t initid; /* Initiator ID */
197 uint32_t targ_port; /* Target port, filled in by PORT */
198 uint32_t targ_lun; /* Destination lun */
199 uint32_t targ_mapped_lun; /* Destination lun CTL-wide */
207 CTL_MSG_MANAGE_TASKS,
210 CTL_MSG_DATAMOVE_DONE,
211 CTL_MSG_UA, /* Set/clear UA on secondary. */
212 CTL_MSG_PORT_SYNC, /* Information about port. */
213 CTL_MSG_LUN_SYNC, /* Information about LUN. */
214 CTL_MSG_IID_SYNC, /* Information about initiator. */
215 CTL_MSG_LOGIN, /* Information about HA peer. */
216 CTL_MSG_MODE_SYNC, /* Mode page current content. */
217 CTL_MSG_FAILOVER /* Fake, never sent though the wire */
223 uint32_t version; /* interface version XXX */
224 ctl_io_type io_type; /* task I/O, SCSI I/O, etc. */
225 ctl_msg_type msg_type;
226 struct ctl_nexus nexus; /* Initiator, port, target, lun */
227 uint32_t iid_indx; /* the index into the iid mapping */
228 uint32_t flags; /* transaction flags */
229 uint32_t status; /* transaction status */
230 uint32_t port_status; /* trans status, set by PORT, 0 = good*/
231 uint32_t timeout; /* timeout in ms */
232 uint32_t retries; /* retry count */
234 struct callout delay_callout;
235 #endif /* CTL_IO_DELAY */
237 time_t start_time; /* I/O start time */
238 struct bintime start_bt; /* Timer start ticks */
239 struct bintime dma_start_bt; /* DMA start ticks */
240 struct bintime dma_bt; /* DMA total ticks */
241 #endif /* CTL_TIME_IO */
242 uint32_t num_dmas; /* Number of DMAs */
243 union ctl_io *remote_io; /* I/O counterpart on remote HA side */
244 union ctl_io *blocker; /* I/O blocking this one */
245 void *pool; /* I/O pool */
246 union ctl_priv ctl_private[CTL_NUM_PRIV];/* CTL private area */
247 TAILQ_HEAD(, ctl_io_hdr) blocked_queue; /* I/Os blocked by this one */
248 STAILQ_ENTRY(ctl_io_hdr) links; /* linked list pointer */
249 LIST_ENTRY(ctl_io_hdr) ooa_links; /* ooa_queue links */
250 TAILQ_ENTRY(ctl_io_hdr) blocked_links; /* blocked_queue links */
257 CTL_TAG_HEAD_OF_QUEUE,
263 typedef void (*ctl_ref)(void *arg, int diff);
266 * SCSI passthrough I/O structure for the CAM Target Layer. Note
267 * that some of these fields are here for completeness, but they aren't
268 * used in the CTL implementation. e.g., timeout and retries won't be
271 * Note: Make sure the io_hdr is *always* the first element in this
275 struct ctl_io_hdr io_hdr; /* common to all I/O types */
278 * The ext_* fields are generally intended for frontend use; CTL itself
279 * doesn't modify or use them.
281 uint32_t ext_sg_entries; /* 0 = no S/G list, > 0 = num entries */
282 uint8_t *ext_data_ptr; /* data buffer or S/G list */
283 uint32_t ext_data_len; /* Data transfer length */
284 uint32_t ext_data_filled; /* Amount of data filled so far */
287 * The number of scatter/gather entries in the list pointed to
288 * by kern_data_ptr. 0 means there is no list, just a data pointer.
290 uint32_t kern_sg_entries;
292 uint32_t rem_sg_entries; /* Unused. */
295 * The data pointer or a pointer to the scatter/gather list.
297 uint8_t *kern_data_ptr;
300 * Length of the data buffer or scatter/gather list. It's also
301 * the length of this particular piece of the data transfer,
302 * ie. number of bytes expected to be transferred by the current
303 * invocation of frontend's datamove() callback. It's always
304 * less than or equal to kern_total_len.
306 uint32_t kern_data_len;
309 * Total length of data to be transferred during this particular
310 * SCSI command, as decoded from SCSI CDB.
312 uint32_t kern_total_len;
315 * Amount of data left after the current data transfer.
317 uint32_t kern_data_resid;
320 * Byte offset of this transfer, equal to the amount of data
321 * already transferred for this SCSI command during previous
322 * datamove() invocations.
324 uint32_t kern_rel_offset;
326 struct scsi_sense_data sense_data; /* sense data */
327 uint8_t sense_len; /* Returned sense length */
328 uint8_t scsi_status; /* SCSI status byte */
329 uint8_t seridx; /* Serialization index. */
330 uint8_t priority; /* Command priority */
331 uint32_t residual; /* Unused */
332 uint32_t tag_num; /* tag number */
333 ctl_tag_type tag_type; /* simple, ordered, head of queue,etc.*/
334 uint8_t cdb_len; /* CDB length */
335 uint8_t cdb[CTL_MAX_CDBLEN]; /* CDB */
336 int (*be_move_done)(union ctl_io *io, bool samethr); /* called by fe */
337 int (*io_cont)(union ctl_io *io); /* to continue processing */
338 ctl_ref kern_data_ref; /* Method to reference/release data */
339 void *kern_data_arg; /* Opaque argument for kern_data_ref() */
344 CTL_TASK_ABORT_TASK_SET,
346 CTL_TASK_CLEAR_TASK_SET,
347 CTL_TASK_I_T_NEXUS_RESET,
349 CTL_TASK_TARGET_RESET,
352 CTL_TASK_PORT_LOGOUT,
354 CTL_TASK_QUERY_TASK_SET,
355 CTL_TASK_QUERY_ASYNC_EVENT
359 CTL_TASK_FUNCTION_COMPLETE,
360 CTL_TASK_FUNCTION_SUCCEEDED,
361 CTL_TASK_FUNCTION_REJECTED,
362 CTL_TASK_LUN_DOES_NOT_EXIST,
363 CTL_TASK_FUNCTION_NOT_SUPPORTED
367 * Task management I/O structure. Aborts, bus resets, etc., are sent using
370 * Note: Make sure the io_hdr is *always* the first element in this
374 struct ctl_io_hdr io_hdr; /* common to all I/O types */
375 ctl_task_type task_action; /* Target Reset, Abort, etc. */
376 uint32_t tag_num; /* tag number */
377 ctl_tag_type tag_type; /* simple, ordered, etc. */
378 uint8_t task_status; /* Complete, Succeeded, etc. */
379 uint8_t task_resp[3];/* Response information */
385 #define CTL_HA_VERSION 3
388 * Used for CTL_MSG_LOGIN.
390 struct ctl_ha_msg_login {
391 ctl_msg_type msg_type;
397 int max_init_per_port;
410 * The PR info is specifically for sending Persistent Reserve actions
411 * to the other SC which it must also act on.
413 * Note: Make sure the io_hdr is *always* the first element in this
417 ctl_pr_action action;
418 uint8_t sa_res_key[8];
423 struct ctl_ha_msg_hdr {
424 ctl_msg_type msg_type;
425 uint32_t status; /* transaction status */
426 union ctl_io *original_sc;
427 union ctl_io *serializing_sc;
428 struct ctl_nexus nexus; /* Initiator, port, target, lun */
431 #define CTL_HA_MAX_SG_ENTRIES 16
432 #define CTL_HA_DATAMOVE_SEGMENT 131072
435 * Used for CTL_MSG_PERS_ACTION.
437 struct ctl_ha_msg_pr {
438 struct ctl_ha_msg_hdr hdr;
439 struct ctl_pr_info pr_info;
443 * Used for CTL_MSG_UA.
445 struct ctl_ha_msg_ua {
446 struct ctl_ha_msg_hdr hdr;
454 * The S/G handling here is a little different than the standard ctl_scsiio
455 * structure, because we can't pass data by reference in between controllers.
456 * The S/G list in the ctl_scsiio struct is normally passed in the
457 * kern_data_ptr field. So kern_sg_entries here will always be non-zero,
458 * even if there is only one entry.
460 * Used for CTL_MSG_DATAMOVE.
462 struct ctl_ha_msg_dt {
463 struct ctl_ha_msg_hdr hdr;
464 ctl_io_flags flags; /* Only I/O flags are used here */
465 uint32_t sg_sequence; /* S/G portion number */
466 uint8_t sg_last; /* last S/G batch = 1 */
467 uint32_t sent_sg_entries; /* previous S/G count */
468 uint32_t cur_sg_entries; /* current S/G entries */
469 uint32_t kern_sg_entries; /* total S/G entries */
470 uint32_t kern_data_len; /* Length of this S/G list */
471 uint32_t kern_total_len; /* Total length of this
473 uint32_t kern_data_resid; /* Length left to transfer
475 uint32_t kern_rel_offset; /* Byte Offset of this
477 struct ctl_sg_entry sg_list[CTL_HA_MAX_SG_ENTRIES];
481 * Used for CTL_MSG_SERIALIZE, CTL_MSG_FINISH_IO, CTL_MSG_BAD_JUJU,
482 * and CTL_MSG_DATAMOVE_DONE.
484 struct ctl_ha_msg_scsi {
485 struct ctl_ha_msg_hdr hdr;
486 uint32_t tag_num; /* tag number */
487 ctl_tag_type tag_type; /* simple, ordered, etc. */
488 uint8_t cdb[CTL_MAX_CDBLEN]; /* CDB */
489 uint8_t cdb_len; /* CDB length */
490 uint8_t scsi_status; /* SCSI status byte */
491 uint8_t sense_len; /* Returned sense length */
492 uint8_t priority; /* Command priority */
493 uint32_t port_status; /* trans status, set by FETD,
495 uint32_t kern_data_resid; /* for DATAMOVE_DONE */
496 struct scsi_sense_data sense_data; /* sense data */
500 * Used for CTL_MSG_MANAGE_TASKS.
502 struct ctl_ha_msg_task {
503 struct ctl_ha_msg_hdr hdr;
504 ctl_task_type task_action; /* Target Reset, Abort, etc. */
505 uint32_t tag_num; /* tag number */
506 ctl_tag_type tag_type; /* simple, ordered, etc. */
510 * Used for CTL_MSG_PORT_SYNC.
512 struct ctl_ha_msg_port {
513 struct ctl_ha_msg_hdr hdr;
521 int target_devid_len;
527 * Used for CTL_MSG_LUN_SYNC.
529 struct ctl_ha_msg_lun {
530 struct ctl_ha_msg_hdr hdr;
532 unsigned int pr_generation;
540 struct ctl_ha_msg_lun_pr_key {
546 * Used for CTL_MSG_IID_SYNC.
548 struct ctl_ha_msg_iid {
549 struct ctl_ha_msg_hdr hdr;
557 * Used for CTL_MSG_MODE_SYNC.
559 struct ctl_ha_msg_mode {
560 struct ctl_ha_msg_hdr hdr;
568 struct ctl_ha_msg_hdr hdr;
569 struct ctl_ha_msg_task task;
570 struct ctl_ha_msg_scsi scsi;
571 struct ctl_ha_msg_dt dt;
572 struct ctl_ha_msg_pr pr;
573 struct ctl_ha_msg_ua ua;
574 struct ctl_ha_msg_port port;
575 struct ctl_ha_msg_lun lun;
576 struct ctl_ha_msg_iid iid;
577 struct ctl_ha_msg_login login;
578 struct ctl_ha_msg_mode mode;
582 struct ctl_io_hdr io_hdr;
583 struct ctl_ha_msg_pr pr_msg;
587 struct ctl_io_hdr io_hdr; /* common to all I/O types */
588 struct ctl_scsiio scsiio; /* Normal SCSI commands */
589 struct ctl_taskio taskio; /* SCSI task management/reset */
590 struct ctl_prio presio; /* update per. res info on other SC */
595 union ctl_io *ctl_alloc_io(void *pool_ref);
596 union ctl_io *ctl_alloc_io_nowait(void *pool_ref);
597 void ctl_free_io(union ctl_io *io);
598 void ctl_zero_io(union ctl_io *io);
602 #endif /* _CTL_IO_H_ */