2 * Copyright (c) 2003 Silicon Graphics International Corp.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions, and the following disclaimer,
10 * without modification.
11 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
12 * substantially similar to the "NO WARRANTY" disclaimer below
13 * ("Disclaimer") and any redistribution must be conditioned upon
14 * including a substantially similar Disclaimer requirement for further
15 * binary redistribution.
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
26 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
27 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGES.
30 * $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_io.h#5 $
34 * CAM Target Layer data movement structures/interface.
36 * Author: Ken Merry <ken@FreeBSD.org>
43 #define EXTERN(__var,__val) __var = __val
45 #define EXTERN(__var,__val) extern __var
48 #define CTL_MAX_CDBLEN 32
50 * Uncomment this next line to enable printing out times for I/Os
51 * that take longer than CTL_TIME_IO_SECS seconds to get to the datamove
56 #define CTL_TIME_IO_DEFAULT_SECS 90
57 EXTERN(int ctl_time_io_secs, CTL_TIME_IO_DEFAULT_SECS);
61 * Uncomment these next two lines 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.
67 #define CTL_TIMER_BYTES sizeof(struct callout)
70 CTL_STATUS_NONE, /* No status */
71 CTL_SUCCESS, /* Transaction completed successfully */
72 CTL_CMD_TIMEOUT, /* Command timed out, shouldn't happen here */
73 CTL_SEL_TIMEOUT, /* Selection timeout, shouldn't happen here */
74 CTL_ERROR, /* General CTL error XXX expand on this? */
75 CTL_SCSI_ERROR, /* SCSI error, look at status byte/sense data */
76 CTL_CMD_ABORTED, /* Command aborted, don't return status */
77 CTL_STATUS_MASK = 0xfff,/* Mask off any status flags */
78 CTL_AUTOSENSE = 0x1000 /* Autosense performed */
82 * WARNING: Keep the data in/out/none flags where they are. They're used
83 * in conjuction with ctl_cmd_flags. See comment above ctl_cmd_flags
84 * definition in ctl_private.h.
87 CTL_FLAG_NONE = 0x00000000, /* no flags */
88 CTL_FLAG_DATA_IN = 0x00000001, /* DATA IN */
89 CTL_FLAG_DATA_OUT = 0x00000002, /* DATA OUT */
90 CTL_FLAG_DATA_NONE = 0x00000003, /* no data */
91 CTL_FLAG_DATA_MASK = 0x00000003,
92 CTL_FLAG_KDPTR_SGLIST = 0x00000008, /* kern_data_ptr is S/G list*/
93 CTL_FLAG_EDPTR_SGLIST = 0x00000010, /* ext_data_ptr is S/G list */
94 CTL_FLAG_DO_AUTOSENSE = 0x00000020, /* grab sense info */
95 CTL_FLAG_USER_REQ = 0x00000040, /* request came from userland */
96 CTL_FLAG_CONTROL_DEV = 0x00000080, /* processor device */
97 CTL_FLAG_ALLOCATED = 0x00000100, /* data space allocated */
98 CTL_FLAG_BLOCKED = 0x00000200, /* on the blocked queue */
99 CTL_FLAG_ABORT_STATUS = 0x00000400, /* return TASK ABORTED status */
100 CTL_FLAG_ABORT = 0x00000800, /* this I/O should be aborted */
101 CTL_FLAG_DMA_INPROG = 0x00001000, /* DMA in progress */
102 CTL_FLAG_NO_DATASYNC = 0x00002000, /* don't cache flush data */
103 CTL_FLAG_DELAY_DONE = 0x00004000, /* delay injection done */
104 CTL_FLAG_INT_COPY = 0x00008000, /* internal copy, no done call*/
105 CTL_FLAG_SENT_2OTHER_SC = 0x00010000,
106 CTL_FLAG_FROM_OTHER_SC = 0x00020000,
107 CTL_FLAG_IS_WAS_ON_RTR = 0x00040000, /* Don't rerun cmd on failover*/
108 CTL_FLAG_BUS_ADDR = 0x00080000, /* ctl_sglist contains BUS
109 addresses, not virtual ones*/
110 CTL_FLAG_IO_CONT = 0x00100000, /* Continue I/O instead of
112 CTL_FLAG_AUTO_MIRROR = 0x00200000, /* Automatically use memory
113 from the RC cache mirrored
116 CTL_FLAG_ALREADY_DONE = 0x00200000 /* I/O already completed */
118 CTL_FLAG_NO_DATAMOVE = 0x00400000,
119 CTL_FLAG_DMA_QUEUED = 0x00800000, /* DMA queued but not started*/
120 CTL_FLAG_STATUS_QUEUED = 0x01000000, /* Status queued but not sent*/
122 CTL_FLAG_REDIR_DONE = 0x02000000, /* Redirection has already
124 CTL_FLAG_FAILOVER = 0x04000000, /* Killed by a failover */
125 CTL_FLAG_IO_ACTIVE = 0x08000000, /* I/O active on this SC */
126 CTL_FLAG_RDMA_MASK = CTL_FLAG_NO_DATASYNC | CTL_FLAG_BUS_ADDR |
127 CTL_FLAG_AUTO_MIRROR | CTL_FLAG_REDIR_DONE,
128 /* Flags we care about for
130 CTL_FLAG_STATUS_SENT = 0x10000000 /* Status sent by datamove */
139 struct ctl_lba_len_flags {
143 #define CTL_LLF_FUA 0x04000000
144 #define CTL_LLF_DPO 0x08000000
145 #define CTL_LLF_READ 0x10000000
146 #define CTL_LLF_WRITE 0x20000000
147 #define CTL_LLF_VERIFY 0x40000000
148 #define CTL_LLF_COMPARE 0x80000000
151 struct ctl_ptr_len_flags {
158 uint8_t bytes[sizeof(uint64_t) * 2];
164 * Number of CTL private areas.
166 #define CTL_NUM_PRIV 6
169 * Which private area are we using for a particular piece of data?
171 #define CTL_PRIV_LUN 0 /* CTL LUN pointer goes here */
172 #define CTL_PRIV_LBA_LEN 1 /* Decoded LBA/len for read/write*/
173 #define CTL_PRIV_MODEPAGE 1 /* Modepage info for config write */
174 #define CTL_PRIV_BACKEND 2 /* Reserved for block, RAIDCore */
175 #define CTL_PRIV_BACKEND_LUN 3 /* Backend LUN pointer */
176 #define CTL_PRIV_FRONTEND 4 /* Frontend storage */
177 #define CTL_PRIV_FRONTEND2 5 /* Another frontend storage */
179 #define CTL_INVALID_PORTNAME 0xFF
180 #define CTL_UNMAPPED_IID 0xFF
182 struct ctl_sg_entry {
199 struct ctl_id initid; /* Initiator ID */
200 uint32_t targ_port; /* Target port, filled in by PORT */
201 struct ctl_id targ_target; /* Destination target */
202 uint32_t targ_lun; /* Destination lun */
203 uint32_t targ_mapped_lun; /* Destination lun CTL-wide */
211 CTL_MSG_MANAGE_TASKS,
215 CTL_MSG_DATAMOVE_DONE
220 #define CTL_NUM_SG_ENTRIES 9
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 uint8_t timer_bytes[CTL_TIMER_BYTES]; /* timer kludge */
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 uint32_t num_dmas; /* Number of DMAs */
242 #endif /* CTL_TIME_IO */
243 union ctl_io *original_sc;
244 union ctl_io *serializing_sc;
245 void *pool; /* I/O pool */
246 union ctl_priv ctl_private[CTL_NUM_PRIV];/* CTL private area */
247 struct ctl_sg_entry remote_sglist[CTL_NUM_SG_ENTRIES];
248 struct ctl_sg_entry remote_dma_sglist[CTL_NUM_SG_ENTRIES];
249 struct ctl_sg_entry local_sglist[CTL_NUM_SG_ENTRIES];
250 struct ctl_sg_entry local_dma_sglist[CTL_NUM_SG_ENTRIES];
251 STAILQ_ENTRY(ctl_io_hdr) links; /* linked list pointer */
252 TAILQ_ENTRY(ctl_io_hdr) ooa_links;
253 TAILQ_ENTRY(ctl_io_hdr) blocked_links;
260 CTL_TAG_HEAD_OF_QUEUE,
267 * SCSI passthrough I/O structure for the CAM Target Layer. Note
268 * that some of these fields are here for completeness, but they aren't
269 * used in the CTL implementation. e.g., timeout and retries won't be
272 * Note: Make sure the io_hdr is *always* the first element in this
276 struct ctl_io_hdr io_hdr; /* common to all I/O types */
279 * The ext_* fields are generally intended for frontend use; CTL itself
280 * doesn't modify or use them.
282 uint32_t ext_sg_entries; /* 0 = no S/G list, > 0 = num entries */
283 uint8_t *ext_data_ptr; /* data buffer or S/G list */
284 uint32_t ext_data_len; /* Data transfer length */
285 uint32_t ext_data_filled; /* Amount of data filled so far */
288 * The number of scatter/gather entries in the list pointed to
289 * by kern_data_ptr. 0 means there is no list, just a data pointer.
291 uint32_t kern_sg_entries;
293 uint32_t rem_sg_entries; /* Unused. */
296 * The data pointer or a pointer to the scatter/gather list.
298 uint8_t *kern_data_ptr;
301 * Length of the data buffer or scatter/gather list. It's also
302 * the length of this particular piece of the data transfer,
303 * ie. number of bytes expected to be transferred by the current
304 * invocation of frontend's datamove() callback. It's always
305 * less than or equal to kern_total_len.
307 uint32_t kern_data_len;
310 * Total length of data to be transferred during this particular
311 * SCSI command, as decoded from SCSI CDB.
313 uint32_t kern_total_len;
316 * Amount of data left after the current data transfer.
318 uint32_t kern_data_resid;
321 * Byte offset of this transfer, equal to the amount of data
322 * already transferred for this SCSI command during previous
323 * datamove() invocations.
325 uint32_t kern_rel_offset;
327 struct scsi_sense_data sense_data; /* sense data */
328 uint8_t sense_len; /* Returned sense length */
329 uint8_t scsi_status; /* SCSI status byte */
330 uint8_t sense_residual; /* Unused. */
331 uint32_t residual; /* data residual length */
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); /* called by fe */
337 int (*io_cont)(union ctl_io *io); /* to continue processing */
342 CTL_TASK_ABORT_TASK_SET,
344 CTL_TASK_CLEAR_TASK_SET,
345 CTL_TASK_I_T_NEXUS_RESET,
347 CTL_TASK_TARGET_RESET,
354 * Task management I/O structure. Aborts, bus resets, etc., are sent using
357 * Note: Make sure the io_hdr is *always* the first element in this
361 struct ctl_io_hdr io_hdr; /* common to all I/O types */
362 ctl_task_type task_action; /* Target Reset, Abort, etc. */
363 uint32_t tag_num; /* tag number */
364 ctl_tag_type tag_type; /* simple, ordered, etc. */
377 * The PR info is specifically for sending Persistent Reserve actions
378 * to the other SC which it must also act on.
380 * Note: Make sure the io_hdr is *always* the first element in this
384 ctl_pr_action action;
385 uint8_t sa_res_key[8];
390 struct ctl_ha_msg_hdr {
391 ctl_msg_type msg_type;
392 union ctl_io *original_sc;
393 union ctl_io *serializing_sc;
394 struct ctl_nexus nexus; /* Initiator, port, target, lun */
395 uint32_t status; /* transaction status */
396 TAILQ_ENTRY(ctl_ha_msg_hdr) links;
399 #define CTL_HA_MAX_SG_ENTRIES 16
402 * Used for CTL_MSG_PERS_ACTION.
404 struct ctl_ha_msg_pr {
405 struct ctl_ha_msg_hdr hdr;
406 struct ctl_pr_info pr_info;
410 * The S/G handling here is a little different than the standard ctl_scsiio
411 * structure, because we can't pass data by reference in between controllers.
412 * The S/G list in the ctl_scsiio struct is normally passed in the
413 * kern_data_ptr field. So kern_sg_entries here will always be non-zero,
414 * even if there is only one entry.
416 * Used for CTL_MSG_DATAMOVE.
418 struct ctl_ha_msg_dt {
419 struct ctl_ha_msg_hdr hdr;
420 ctl_io_flags flags; /* Only I/O flags are used here */
421 uint32_t sg_sequence; /* S/G portion number */
422 uint8_t sg_last; /* last S/G batch = 1 */
423 uint32_t sent_sg_entries; /* previous S/G count */
424 uint32_t cur_sg_entries; /* current S/G entries */
425 uint32_t kern_sg_entries; /* total S/G entries */
426 uint32_t kern_data_len; /* Length of this S/G list */
427 uint32_t kern_total_len; /* Total length of this
429 uint32_t kern_data_resid; /* Length left to transfer
431 uint32_t kern_rel_offset; /* Byte Offset of this
433 struct ctl_sg_entry sg_list[CTL_HA_MAX_SG_ENTRIES];
437 * Used for CTL_MSG_SERIALIZE, CTL_MSG_FINISH_IO, CTL_MSG_BAD_JUJU.
439 struct ctl_ha_msg_scsi {
440 struct ctl_ha_msg_hdr hdr;
441 uint8_t cdb[CTL_MAX_CDBLEN]; /* CDB */
442 uint32_t tag_num; /* tag number */
443 ctl_tag_type tag_type; /* simple, ordered, etc. */
444 uint8_t scsi_status; /* SCSI status byte */
445 struct scsi_sense_data sense_data; /* sense data */
446 uint8_t sense_len; /* Returned sense length */
447 uint8_t sense_residual; /* sense residual length */
448 uint32_t residual; /* data residual length */
449 uint32_t fetd_status; /* trans status, set by FETD,
451 struct ctl_lba_len lbalen; /* used for stats */
455 * Used for CTL_MSG_MANAGE_TASKS.
457 struct ctl_ha_msg_task {
458 struct ctl_ha_msg_hdr hdr;
459 ctl_task_type task_action; /* Target Reset, Abort, etc. */
460 uint32_t tag_num; /* tag number */
461 ctl_tag_type tag_type; /* simple, ordered, etc. */
465 struct ctl_ha_msg_hdr hdr;
466 struct ctl_ha_msg_task task;
467 struct ctl_ha_msg_scsi scsi;
468 struct ctl_ha_msg_dt dt;
469 struct ctl_ha_msg_pr pr;
474 struct ctl_io_hdr io_hdr;
475 struct ctl_ha_msg_pr pr_msg;
481 struct ctl_io_hdr io_hdr; /* common to all I/O types */
482 struct ctl_scsiio scsiio; /* Normal SCSI commands */
483 struct ctl_taskio taskio; /* SCSI task management/reset */
484 struct ctl_prio presio; /* update per. res info on other SC */
489 union ctl_io *ctl_alloc_io(void *pool_ref);
490 union ctl_io *ctl_alloc_io_nowait(void *pool_ref);
491 void ctl_free_io(union ctl_io *io);
492 void ctl_zero_io(union ctl_io *io);
493 void ctl_copy_io(union ctl_io *src, union ctl_io *dest);
497 #endif /* _CTL_IO_H_ */