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i2c-eg20t: change timeout value 50msec to 1000msec
[zen-stable.git] / drivers / scsi / aic7xxx / aic7xxx_core.c
blobdc28b0a91b22706c1a5b715677635bdaff9b6f95
1 /*
2 * Core routines and tables shareable across OS platforms.
3 *
4 * Copyright (c) 1994-2002 Justin T. Gibbs.
5 * Copyright (c) 2000-2002 Adaptec Inc.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions, and the following disclaimer,
13 * without modification.
14 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
15 * substantially similar to the "NO WARRANTY" disclaimer below
16 * ("Disclaimer") and any redistribution must be conditioned upon
17 * including a substantially similar Disclaimer requirement for further
18 * binary redistribution.
19 * 3. Neither the names of the above-listed copyright holders nor the names
20 * of any contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * Alternatively, this software may be distributed under the terms of the
24 * GNU General Public License ("GPL") version 2 as published by the Free
25 * Software Foundation.
26 *
27 * NO WARRANTY
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
36 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
37 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
38 * POSSIBILITY OF SUCH DAMAGES.
39 *
40 * $Id: //depot/aic7xxx/aic7xxx/aic7xxx.c#155 $
41 */
42
43 #ifdef __linux__
44 #include "aic7xxx_osm.h"
45 #include "aic7xxx_inline.h"
46 #include "aicasm/aicasm_insformat.h"
47 #else
48 #include <dev/aic7xxx/aic7xxx_osm.h>
49 #include <dev/aic7xxx/aic7xxx_inline.h>
50 #include <dev/aic7xxx/aicasm/aicasm_insformat.h>
51 #endif
52
53 /***************************** Lookup Tables **********************************/
54 static const char *const ahc_chip_names[] = {
55 "NONE",
56 "aic7770",
57 "aic7850",
58 "aic7855",
59 "aic7859",
60 "aic7860",
61 "aic7870",
62 "aic7880",
63 "aic7895",
64 "aic7895C",
65 "aic7890/91",
66 "aic7896/97",
67 "aic7892",
68 "aic7899"
69 };
70 static const u_int num_chip_names = ARRAY_SIZE(ahc_chip_names);
71
72 /*
73 * Hardware error codes.
74 */
75 struct ahc_hard_error_entry {
76 uint8_t errno;
77 const char *errmesg;
78 };
79
80 static const struct ahc_hard_error_entry ahc_hard_errors[] = {
81 { ILLHADDR, "Illegal Host Access" },
82 { ILLSADDR, "Illegal Sequencer Address referrenced" },
83 { ILLOPCODE, "Illegal Opcode in sequencer program" },
84 { SQPARERR, "Sequencer Parity Error" },
85 { DPARERR, "Data-path Parity Error" },
86 { MPARERR, "Scratch or SCB Memory Parity Error" },
87 { PCIERRSTAT, "PCI Error detected" },
88 { CIOPARERR, "CIOBUS Parity Error" },
89 };
90 static const u_int num_errors = ARRAY_SIZE(ahc_hard_errors);
91
92 static const struct ahc_phase_table_entry ahc_phase_table[] =
93 {
94 { P_DATAOUT, MSG_NOOP, "in Data-out phase" },
95 { P_DATAIN, MSG_INITIATOR_DET_ERR, "in Data-in phase" },
96 { P_DATAOUT_DT, MSG_NOOP, "in DT Data-out phase" },
97 { P_DATAIN_DT, MSG_INITIATOR_DET_ERR, "in DT Data-in phase" },
98 { P_COMMAND, MSG_NOOP, "in Command phase" },
99 { P_MESGOUT, MSG_NOOP, "in Message-out phase" },
100 { P_STATUS, MSG_INITIATOR_DET_ERR, "in Status phase" },
101 { P_MESGIN, MSG_PARITY_ERROR, "in Message-in phase" },
102 { P_BUSFREE, MSG_NOOP, "while idle" },
103 { 0, MSG_NOOP, "in unknown phase" }
104 };
105
106 /*
107 * In most cases we only wish to itterate over real phases, so
108 * exclude the last element from the count.
109 */
110 static const u_int num_phases = ARRAY_SIZE(ahc_phase_table) - 1;
111
112 /*
113 * Valid SCSIRATE values. (p. 3-17)
114 * Provides a mapping of tranfer periods in ns to the proper value to
115 * stick in the scsixfer reg.
116 */
117 static const struct ahc_syncrate ahc_syncrates[] =
118 {
119 /* ultra2 fast/ultra period rate */
120 { 0x42, 0x000, 9, "80.0" },
121 { 0x03, 0x000, 10, "40.0" },
122 { 0x04, 0x000, 11, "33.0" },
123 { 0x05, 0x100, 12, "20.0" },
124 { 0x06, 0x110, 15, "16.0" },
125 { 0x07, 0x120, 18, "13.4" },
126 { 0x08, 0x000, 25, "10.0" },
127 { 0x19, 0x010, 31, "8.0" },
128 { 0x1a, 0x020, 37, "6.67" },
129 { 0x1b, 0x030, 43, "5.7" },
130 { 0x1c, 0x040, 50, "5.0" },
131 { 0x00, 0x050, 56, "4.4" },
132 { 0x00, 0x060, 62, "4.0" },
133 { 0x00, 0x070, 68, "3.6" },
134 { 0x00, 0x000, 0, NULL }
135 };
136
137 /* Our Sequencer Program */
138 #include "aic7xxx_seq.h"
139
140 /**************************** Function Declarations ***************************/
141 static void ahc_force_renegotiation(struct ahc_softc *ahc,
142 struct ahc_devinfo *devinfo);
143 static struct ahc_tmode_tstate*
144 ahc_alloc_tstate(struct ahc_softc *ahc,
145 u_int scsi_id, char channel);
146 #ifdef AHC_TARGET_MODE
147 static void ahc_free_tstate(struct ahc_softc *ahc,
148 u_int scsi_id, char channel, int force);
149 #endif
150 static const struct ahc_syncrate*
151 ahc_devlimited_syncrate(struct ahc_softc *ahc,
152 struct ahc_initiator_tinfo *,
153 u_int *period,
154 u_int *ppr_options,
155 role_t role);
156 static void ahc_update_pending_scbs(struct ahc_softc *ahc);
157 static void ahc_fetch_devinfo(struct ahc_softc *ahc,
158 struct ahc_devinfo *devinfo);
159 static void ahc_scb_devinfo(struct ahc_softc *ahc,
160 struct ahc_devinfo *devinfo,
161 struct scb *scb);
162 static void ahc_assert_atn(struct ahc_softc *ahc);
163 static void ahc_setup_initiator_msgout(struct ahc_softc *ahc,
164 struct ahc_devinfo *devinfo,
165 struct scb *scb);
166 static void ahc_build_transfer_msg(struct ahc_softc *ahc,
167 struct ahc_devinfo *devinfo);
168 static void ahc_construct_sdtr(struct ahc_softc *ahc,
169 struct ahc_devinfo *devinfo,
170 u_int period, u_int offset);
171 static void ahc_construct_wdtr(struct ahc_softc *ahc,
172 struct ahc_devinfo *devinfo,
173 u_int bus_width);
174 static void ahc_construct_ppr(struct ahc_softc *ahc,
175 struct ahc_devinfo *devinfo,
176 u_int period, u_int offset,
177 u_int bus_width, u_int ppr_options);
178 static void ahc_clear_msg_state(struct ahc_softc *ahc);
179 static void ahc_handle_proto_violation(struct ahc_softc *ahc);
180 static void ahc_handle_message_phase(struct ahc_softc *ahc);
181 typedef enum {
182 AHCMSG_1B,
183 AHCMSG_2B,
184 AHCMSG_EXT
185 } ahc_msgtype;
186 static int ahc_sent_msg(struct ahc_softc *ahc, ahc_msgtype type,
187 u_int msgval, int full);
188 static int ahc_parse_msg(struct ahc_softc *ahc,
189 struct ahc_devinfo *devinfo);
190 static int ahc_handle_msg_reject(struct ahc_softc *ahc,
191 struct ahc_devinfo *devinfo);
192 static void ahc_handle_ign_wide_residue(struct ahc_softc *ahc,
193 struct ahc_devinfo *devinfo);
194 static void ahc_reinitialize_dataptrs(struct ahc_softc *ahc);
195 static void ahc_handle_devreset(struct ahc_softc *ahc,
196 struct ahc_devinfo *devinfo,
197 cam_status status, char *message,
198 int verbose_level);
199 #ifdef AHC_TARGET_MODE
200 static void ahc_setup_target_msgin(struct ahc_softc *ahc,
201 struct ahc_devinfo *devinfo,
202 struct scb *scb);
203 #endif
204
205 static bus_dmamap_callback_t ahc_dmamap_cb;
206 static void ahc_build_free_scb_list(struct ahc_softc *ahc);
207 static int ahc_init_scbdata(struct ahc_softc *ahc);
208 static void ahc_fini_scbdata(struct ahc_softc *ahc);
209 static void ahc_qinfifo_requeue(struct ahc_softc *ahc,
210 struct scb *prev_scb,
211 struct scb *scb);
212 static int ahc_qinfifo_count(struct ahc_softc *ahc);
213 static u_int ahc_rem_scb_from_disc_list(struct ahc_softc *ahc,
214 u_int prev, u_int scbptr);
215 static void ahc_add_curscb_to_free_list(struct ahc_softc *ahc);
216 static u_int ahc_rem_wscb(struct ahc_softc *ahc,
217 u_int scbpos, u_int prev);
218 static void ahc_reset_current_bus(struct ahc_softc *ahc);
219 #ifdef AHC_DUMP_SEQ
220 static void ahc_dumpseq(struct ahc_softc *ahc);
221 #endif
222 static int ahc_loadseq(struct ahc_softc *ahc);
223 static int ahc_check_patch(struct ahc_softc *ahc,
224 const struct patch **start_patch,
225 u_int start_instr, u_int *skip_addr);
226 static void ahc_download_instr(struct ahc_softc *ahc,
227 u_int instrptr, uint8_t *dconsts);
228 #ifdef AHC_TARGET_MODE
229 static void ahc_queue_lstate_event(struct ahc_softc *ahc,
230 struct ahc_tmode_lstate *lstate,
231 u_int initiator_id,
232 u_int event_type,
233 u_int event_arg);
234 static void ahc_update_scsiid(struct ahc_softc *ahc,
235 u_int targid_mask);
236 static int ahc_handle_target_cmd(struct ahc_softc *ahc,
237 struct target_cmd *cmd);
238 #endif
239
240 static u_int ahc_index_busy_tcl(struct ahc_softc *ahc, u_int tcl);
241 static void ahc_unbusy_tcl(struct ahc_softc *ahc, u_int tcl);
242 static void ahc_busy_tcl(struct ahc_softc *ahc,
243 u_int tcl, u_int busyid);
244
245 /************************** SCB and SCB queue management **********************/
246 static void ahc_run_untagged_queues(struct ahc_softc *ahc);
247 static void ahc_run_untagged_queue(struct ahc_softc *ahc,
248 struct scb_tailq *queue);
249
250 /****************************** Initialization ********************************/
251 static void ahc_alloc_scbs(struct ahc_softc *ahc);
252 static void ahc_shutdown(void *arg);
253
254 /*************************** Interrupt Services *******************************/
255 static void ahc_clear_intstat(struct ahc_softc *ahc);
256 static void ahc_run_qoutfifo(struct ahc_softc *ahc);
257 #ifdef AHC_TARGET_MODE
258 static void ahc_run_tqinfifo(struct ahc_softc *ahc, int paused);
259 #endif
260 static void ahc_handle_brkadrint(struct ahc_softc *ahc);
261 static void ahc_handle_seqint(struct ahc_softc *ahc, u_int intstat);
262 static void ahc_handle_scsiint(struct ahc_softc *ahc,
263 u_int intstat);
264 static void ahc_clear_critical_section(struct ahc_softc *ahc);
265
266 /***************************** Error Recovery *********************************/
267 static void ahc_freeze_devq(struct ahc_softc *ahc, struct scb *scb);
268 static int ahc_abort_scbs(struct ahc_softc *ahc, int target,
269 char channel, int lun, u_int tag,
270 role_t role, uint32_t status);
271 static void ahc_calc_residual(struct ahc_softc *ahc,
272 struct scb *scb);
273
274 /*********************** Untagged Transaction Routines ************************/
275 static inline void ahc_freeze_untagged_queues(struct ahc_softc *ahc);
276 static inline void ahc_release_untagged_queues(struct ahc_softc *ahc);
277
278 /*
279 * Block our completion routine from starting the next untagged
280 * transaction for this target or target lun.
281 */
282 static inline void
283 ahc_freeze_untagged_queues(struct ahc_softc *ahc)
284 {
285 if ((ahc->flags & AHC_SCB_BTT) == 0)
286 ahc->untagged_queue_lock++;
287 }
288
289 /*
290 * Allow the next untagged transaction for this target or target lun
291 * to be executed. We use a counting semaphore to allow the lock
292 * to be acquired recursively. Once the count drops to zero, the
293 * transaction queues will be run.
294 */
295 static inline void
296 ahc_release_untagged_queues(struct ahc_softc *ahc)
297 {
298 if ((ahc->flags & AHC_SCB_BTT) == 0) {
299 ahc->untagged_queue_lock--;
300 if (ahc->untagged_queue_lock == 0)
301 ahc_run_untagged_queues(ahc);
302 }
303 }
304
305 /************************* Sequencer Execution Control ************************/
306 /*
307 * Work around any chip bugs related to halting sequencer execution.
308 * On Ultra2 controllers, we must clear the CIOBUS stretch signal by
309 * reading a register that will set this signal and deassert it.
310 * Without this workaround, if the chip is paused, by an interrupt or
311 * manual pause while accessing scb ram, accesses to certain registers
312 * will hang the system (infinite pci retries).
313 */
314 static void
315 ahc_pause_bug_fix(struct ahc_softc *ahc)
316 {
317 if ((ahc->features & AHC_ULTRA2) != 0)
318 (void)ahc_inb(ahc, CCSCBCTL);
319 }
320
321 /*
322 * Determine whether the sequencer has halted code execution.
323 * Returns non-zero status if the sequencer is stopped.
324 */
325 int
326 ahc_is_paused(struct ahc_softc *ahc)
327 {
328 return ((ahc_inb(ahc, HCNTRL) & PAUSE) != 0);
329 }
330
331 /*
332 * Request that the sequencer stop and wait, indefinitely, for it
333 * to stop. The sequencer will only acknowledge that it is paused
334 * once it has reached an instruction boundary and PAUSEDIS is
335 * cleared in the SEQCTL register. The sequencer may use PAUSEDIS
336 * for critical sections.
337 */
338 void
339 ahc_pause(struct ahc_softc *ahc)
340 {
341 ahc_outb(ahc, HCNTRL, ahc->pause);
342
343 /*
344 * Since the sequencer can disable pausing in a critical section, we
345 * must loop until it actually stops.
346 */
347 while (ahc_is_paused(ahc) == 0)
348 ;
349
350 ahc_pause_bug_fix(ahc);
351 }
352
353 /*
354 * Allow the sequencer to continue program execution.
355 * We check here to ensure that no additional interrupt
356 * sources that would cause the sequencer to halt have been
357 * asserted. If, for example, a SCSI bus reset is detected
358 * while we are fielding a different, pausing, interrupt type,
359 * we don't want to release the sequencer before going back
360 * into our interrupt handler and dealing with this new
361 * condition.
362 */
363 void
364 ahc_unpause(struct ahc_softc *ahc)
365 {
366 if ((ahc_inb(ahc, INTSTAT) & (SCSIINT | SEQINT | BRKADRINT)) == 0)
367 ahc_outb(ahc, HCNTRL, ahc->unpause);
368 }
369
370 /************************** Memory mapping routines ***************************/
371 static struct ahc_dma_seg *
372 ahc_sg_bus_to_virt(struct scb *scb, uint32_t sg_busaddr)
373 {
374 int sg_index;
375
376 sg_index = (sg_busaddr - scb->sg_list_phys)/sizeof(struct ahc_dma_seg);
377 /* sg_list_phys points to entry 1, not 0 */
378 sg_index++;
379
380 return (&scb->sg_list[sg_index]);
381 }
382
383 static uint32_t
384 ahc_sg_virt_to_bus(struct scb *scb, struct ahc_dma_seg *sg)
385 {
386 int sg_index;
387
388 /* sg_list_phys points to entry 1, not 0 */
389 sg_index = sg - &scb->sg_list[1];
390
391 return (scb->sg_list_phys + (sg_index * sizeof(*scb->sg_list)));
392 }
393
394 static uint32_t
395 ahc_hscb_busaddr(struct ahc_softc *ahc, u_int index)
396 {
397 return (ahc->scb_data->hscb_busaddr
398 + (sizeof(struct hardware_scb) * index));
399 }
400
401 static void
402 ahc_sync_scb(struct ahc_softc *ahc, struct scb *scb, int op)
403 {
404 ahc_dmamap_sync(ahc, ahc->scb_data->hscb_dmat,
405 ahc->scb_data->hscb_dmamap,
406 /*offset*/(scb->hscb - ahc->hscbs) * sizeof(*scb->hscb),
407 /*len*/sizeof(*scb->hscb), op);
408 }
409
410 void
411 ahc_sync_sglist(struct ahc_softc *ahc, struct scb *scb, int op)
412 {
413 if (scb->sg_count == 0)
414 return;
415
416 ahc_dmamap_sync(ahc, ahc->scb_data->sg_dmat, scb->sg_map->sg_dmamap,
417 /*offset*/(scb->sg_list - scb->sg_map->sg_vaddr)
418 * sizeof(struct ahc_dma_seg),
419 /*len*/sizeof(struct ahc_dma_seg) * scb->sg_count, op);
420 }
421
422 #ifdef AHC_TARGET_MODE
423 static uint32_t
424 ahc_targetcmd_offset(struct ahc_softc *ahc, u_int index)
425 {
426 return (((uint8_t *)&ahc->targetcmds[index]) - ahc->qoutfifo);
427 }
428 #endif
429
430 /*********************** Miscellaneous Support Functions ***********************/
431 /*
432 * Determine whether the sequencer reported a residual
433 * for this SCB/transaction.
434 */
435 static void
436 ahc_update_residual(struct ahc_softc *ahc, struct scb *scb)
437 {
438 uint32_t sgptr;
439
440 sgptr = ahc_le32toh(scb->hscb->sgptr);
441 if ((sgptr & SG_RESID_VALID) != 0)
442 ahc_calc_residual(ahc, scb);
443 }
444
445 /*
446 * Return pointers to the transfer negotiation information
447 * for the specified our_id/remote_id pair.
448 */
449 struct ahc_initiator_tinfo *
450 ahc_fetch_transinfo(struct ahc_softc *ahc, char channel, u_int our_id,
451 u_int remote_id, struct ahc_tmode_tstate **tstate)
452 {
453 /*
454 * Transfer data structures are stored from the perspective
455 * of the target role. Since the parameters for a connection
456 * in the initiator role to a given target are the same as
457 * when the roles are reversed, we pretend we are the target.
458 */
459 if (channel == 'B')
460 our_id += 8;
461 *tstate = ahc->enabled_targets[our_id];
462 return (&(*tstate)->transinfo[remote_id]);
463 }
464
465 uint16_t
466 ahc_inw(struct ahc_softc *ahc, u_int port)
467 {
468 uint16_t r = ahc_inb(ahc, port+1) << 8;
469 return r | ahc_inb(ahc, port);
470 }
471
472 void
473 ahc_outw(struct ahc_softc *ahc, u_int port, u_int value)
474 {
475 ahc_outb(ahc, port, value & 0xFF);
476 ahc_outb(ahc, port+1, (value >> 8) & 0xFF);
477 }
478
479 uint32_t
480 ahc_inl(struct ahc_softc *ahc, u_int port)
481 {
482 return ((ahc_inb(ahc, port))
483 | (ahc_inb(ahc, port+1) << 8)
484 | (ahc_inb(ahc, port+2) << 16)
485 | (ahc_inb(ahc, port+3) << 24));
486 }
487
488 void
489 ahc_outl(struct ahc_softc *ahc, u_int port, uint32_t value)
490 {
491 ahc_outb(ahc, port, (value) & 0xFF);
492 ahc_outb(ahc, port+1, ((value) >> 8) & 0xFF);
493 ahc_outb(ahc, port+2, ((value) >> 16) & 0xFF);
494 ahc_outb(ahc, port+3, ((value) >> 24) & 0xFF);
495 }
496
497 uint64_t
498 ahc_inq(struct ahc_softc *ahc, u_int port)
499 {
500 return ((ahc_inb(ahc, port))
501 | (ahc_inb(ahc, port+1) << 8)
502 | (ahc_inb(ahc, port+2) << 16)
503 | (ahc_inb(ahc, port+3) << 24)
504 | (((uint64_t)ahc_inb(ahc, port+4)) << 32)
505 | (((uint64_t)ahc_inb(ahc, port+5)) << 40)
506 | (((uint64_t)ahc_inb(ahc, port+6)) << 48)
507 | (((uint64_t)ahc_inb(ahc, port+7)) << 56));
508 }
509
510 void
511 ahc_outq(struct ahc_softc *ahc, u_int port, uint64_t value)
512 {
513 ahc_outb(ahc, port, value & 0xFF);
514 ahc_outb(ahc, port+1, (value >> 8) & 0xFF);
515 ahc_outb(ahc, port+2, (value >> 16) & 0xFF);
516 ahc_outb(ahc, port+3, (value >> 24) & 0xFF);
517 ahc_outb(ahc, port+4, (value >> 32) & 0xFF);
518 ahc_outb(ahc, port+5, (value >> 40) & 0xFF);
519 ahc_outb(ahc, port+6, (value >> 48) & 0xFF);
520 ahc_outb(ahc, port+7, (value >> 56) & 0xFF);
521 }
522
523 /*
524 * Get a free scb. If there are none, see if we can allocate a new SCB.
525 */
526 struct scb *
527 ahc_get_scb(struct ahc_softc *ahc)
528 {
529 struct scb *scb;
530
531 if ((scb = SLIST_FIRST(&ahc->scb_data->free_scbs)) == NULL) {
532 ahc_alloc_scbs(ahc);
533 scb = SLIST_FIRST(&ahc->scb_data->free_scbs);
534 if (scb == NULL)
535 return (NULL);
536 }
537 SLIST_REMOVE_HEAD(&ahc->scb_data->free_scbs, links.sle);
538 return (scb);
539 }
540
541 /*
542 * Return an SCB resource to the free list.
543 */
544 void
545 ahc_free_scb(struct ahc_softc *ahc, struct scb *scb)
546 {
547 struct hardware_scb *hscb;
548
549 hscb = scb->hscb;
550 /* Clean up for the next user */
551 ahc->scb_data->scbindex[hscb->tag] = NULL;
552 scb->flags = SCB_FREE;
553 hscb->control = 0;
554
555 SLIST_INSERT_HEAD(&ahc->scb_data->free_scbs, scb, links.sle);
556
557 /* Notify the OSM that a resource is now available. */
558 ahc_platform_scb_free(ahc, scb);
559 }
560
561 struct scb *
562 ahc_lookup_scb(struct ahc_softc *ahc, u_int tag)
563 {
564 struct scb* scb;
565
566 scb = ahc->scb_data->scbindex[tag];
567 if (scb != NULL)
568 ahc_sync_scb(ahc, scb,
569 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
570 return (scb);
571 }
572
573 static void
574 ahc_swap_with_next_hscb(struct ahc_softc *ahc, struct scb *scb)
575 {
576 struct hardware_scb *q_hscb;
577 u_int saved_tag;
578
579 /*
580 * Our queuing method is a bit tricky. The card
581 * knows in advance which HSCB to download, and we
582 * can't disappoint it. To achieve this, the next
583 * SCB to download is saved off in ahc->next_queued_scb.
584 * When we are called to queue "an arbitrary scb",
585 * we copy the contents of the incoming HSCB to the one
586 * the sequencer knows about, swap HSCB pointers and
587 * finally assign the SCB to the tag indexed location
588 * in the scb_array. This makes sure that we can still
589 * locate the correct SCB by SCB_TAG.
590 */
591 q_hscb = ahc->next_queued_scb->hscb;
592 saved_tag = q_hscb->tag;
593 memcpy(q_hscb, scb->hscb, sizeof(*scb->hscb));
594 if ((scb->flags & SCB_CDB32_PTR) != 0) {
595 q_hscb->shared_data.cdb_ptr =
596 ahc_htole32(ahc_hscb_busaddr(ahc, q_hscb->tag)
597 + offsetof(struct hardware_scb, cdb32));
598 }
599 q_hscb->tag = saved_tag;
600 q_hscb->next = scb->hscb->tag;
601
602 /* Now swap HSCB pointers. */
603 ahc->next_queued_scb->hscb = scb->hscb;
604 scb->hscb = q_hscb;
605
606 /* Now define the mapping from tag to SCB in the scbindex */
607 ahc->scb_data->scbindex[scb->hscb->tag] = scb;
608 }
609
610 /*
611 * Tell the sequencer about a new transaction to execute.
612 */
613 void
614 ahc_queue_scb(struct ahc_softc *ahc, struct scb *scb)
615 {
616 ahc_swap_with_next_hscb(ahc, scb);
617
618 if (scb->hscb->tag == SCB_LIST_NULL
619 || scb->hscb->next == SCB_LIST_NULL)
620 panic("Attempt to queue invalid SCB tag %x:%x\n",
621 scb->hscb->tag, scb->hscb->next);
622
623 /*
624 * Setup data "oddness".
625 */
626 scb->hscb->lun &= LID;
627 if (ahc_get_transfer_length(scb) & 0x1)
628 scb->hscb->lun |= SCB_XFERLEN_ODD;
629
630 /*
631 * Keep a history of SCBs we've downloaded in the qinfifo.
632 */
633 ahc->qinfifo[ahc->qinfifonext++] = scb->hscb->tag;
634
635 /*
636 * Make sure our data is consistent from the
637 * perspective of the adapter.
638 */
639 ahc_sync_scb(ahc, scb, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
640
641 /* Tell the adapter about the newly queued SCB */
642 if ((ahc->features & AHC_QUEUE_REGS) != 0) {
643 ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext);
644 } else {
645 if ((ahc->features & AHC_AUTOPAUSE) == 0)
646 ahc_pause(ahc);
647 ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext);
648 if ((ahc->features & AHC_AUTOPAUSE) == 0)
649 ahc_unpause(ahc);
650 }
651 }
652
653 struct scsi_sense_data *
654 ahc_get_sense_buf(struct ahc_softc *ahc, struct scb *scb)
655 {
656 int offset;
657
658 offset = scb - ahc->scb_data->scbarray;
659 return (&ahc->scb_data->sense[offset]);
660 }
661
662 static uint32_t
663 ahc_get_sense_bufaddr(struct ahc_softc *ahc, struct scb *scb)
664 {
665 int offset;
666
667 offset = scb - ahc->scb_data->scbarray;
668 return (ahc->scb_data->sense_busaddr
669 + (offset * sizeof(struct scsi_sense_data)));
670 }
671
672 /************************** Interrupt Processing ******************************/
673 static void
674 ahc_sync_qoutfifo(struct ahc_softc *ahc, int op)
675 {
676 ahc_dmamap_sync(ahc, ahc->shared_data_dmat, ahc->shared_data_dmamap,
677 /*offset*/0, /*len*/256, op);
678 }
679
680 static void
681 ahc_sync_tqinfifo(struct ahc_softc *ahc, int op)
682 {
683 #ifdef AHC_TARGET_MODE
684 if ((ahc->flags & AHC_TARGETROLE) != 0) {
685 ahc_dmamap_sync(ahc, ahc->shared_data_dmat,
686 ahc->shared_data_dmamap,
687 ahc_targetcmd_offset(ahc, 0),
688 sizeof(struct target_cmd) * AHC_TMODE_CMDS,
689 op);
690 }
691 #endif
692 }
693
694 /*
695 * See if the firmware has posted any completed commands
696 * into our in-core command complete fifos.
697 */
698 #define AHC_RUN_QOUTFIFO 0x1
699 #define AHC_RUN_TQINFIFO 0x2
700 static u_int
701 ahc_check_cmdcmpltqueues(struct ahc_softc *ahc)
702 {
703 u_int retval;
704
705 retval = 0;
706 ahc_dmamap_sync(ahc, ahc->shared_data_dmat, ahc->shared_data_dmamap,
707 /*offset*/ahc->qoutfifonext, /*len*/1,
708 BUS_DMASYNC_POSTREAD);
709 if (ahc->qoutfifo[ahc->qoutfifonext] != SCB_LIST_NULL)
710 retval |= AHC_RUN_QOUTFIFO;
711 #ifdef AHC_TARGET_MODE
712 if ((ahc->flags & AHC_TARGETROLE) != 0
713 && (ahc->flags & AHC_TQINFIFO_BLOCKED) == 0) {
714 ahc_dmamap_sync(ahc, ahc->shared_data_dmat,
715 ahc->shared_data_dmamap,
716 ahc_targetcmd_offset(ahc, ahc->tqinfifofnext),
717 /*len*/sizeof(struct target_cmd),
718 BUS_DMASYNC_POSTREAD);
719 if (ahc->targetcmds[ahc->tqinfifonext].cmd_valid != 0)
720 retval |= AHC_RUN_TQINFIFO;
721 }
722 #endif
723 return (retval);
724 }
725
726 /*
727 * Catch an interrupt from the adapter
728 */
729 int
730 ahc_intr(struct ahc_softc *ahc)
731 {
732 u_int intstat;
733
734 if ((ahc->pause & INTEN) == 0) {
735 /*
736 * Our interrupt is not enabled on the chip
737 * and may be disabled for re-entrancy reasons,
738 * so just return. This is likely just a shared
739 * interrupt.
740 */
741 return (0);
742 }
743 /*
744 * Instead of directly reading the interrupt status register,
745 * infer the cause of the interrupt by checking our in-core
746 * completion queues. This avoids a costly PCI bus read in
747 * most cases.
748 */
749 if ((ahc->flags & (AHC_ALL_INTERRUPTS|AHC_EDGE_INTERRUPT)) == 0
750 && (ahc_check_cmdcmpltqueues(ahc) != 0))
751 intstat = CMDCMPLT;
752 else {
753 intstat = ahc_inb(ahc, INTSTAT);
754 }
755
756 if ((intstat & INT_PEND) == 0) {
757 #if AHC_PCI_CONFIG > 0
758 if (ahc->unsolicited_ints > 500) {
759 ahc->unsolicited_ints = 0;
760 if ((ahc->chip & AHC_PCI) != 0
761 && (ahc_inb(ahc, ERROR) & PCIERRSTAT) != 0)
762 ahc->bus_intr(ahc);
763 }
764 #endif
765 ahc->unsolicited_ints++;
766 return (0);
767 }
768 ahc->unsolicited_ints = 0;
769
770 if (intstat & CMDCMPLT) {
771 ahc_outb(ahc, CLRINT, CLRCMDINT);
772
773 /*
774 * Ensure that the chip sees that we've cleared
775 * this interrupt before we walk the output fifo.
776 * Otherwise, we may, due to posted bus writes,
777 * clear the interrupt after we finish the scan,
778 * and after the sequencer has added new entries
779 * and asserted the interrupt again.
780 */
781 ahc_flush_device_writes(ahc);
782 ahc_run_qoutfifo(ahc);
783 #ifdef AHC_TARGET_MODE
784 if ((ahc->flags & AHC_TARGETROLE) != 0)
785 ahc_run_tqinfifo(ahc, /*paused*/FALSE);
786 #endif
787 }
788
789 /*
790 * Handle statuses that may invalidate our cached
791 * copy of INTSTAT separately.
792 */
793 if (intstat == 0xFF && (ahc->features & AHC_REMOVABLE) != 0) {
794 /* Hot eject. Do nothing */
795 } else if (intstat & BRKADRINT) {
796 ahc_handle_brkadrint(ahc);
797 } else if ((intstat & (SEQINT|SCSIINT)) != 0) {
798
799 ahc_pause_bug_fix(ahc);
800
801 if ((intstat & SEQINT) != 0)
802 ahc_handle_seqint(ahc, intstat);
803
804 if ((intstat & SCSIINT) != 0)
805 ahc_handle_scsiint(ahc, intstat);
806 }
807 return (1);
808 }
809
810 /************************* Sequencer Execution Control ************************/
811 /*
812 * Restart the sequencer program from address zero
813 */
814 static void
815 ahc_restart(struct ahc_softc *ahc)
816 {
817 uint8_t sblkctl;
818
819 ahc_pause(ahc);
820
821 /* No more pending messages. */
822 ahc_clear_msg_state(ahc);
823
824 ahc_outb(ahc, SCSISIGO, 0); /* De-assert BSY */
825 ahc_outb(ahc, MSG_OUT, MSG_NOOP); /* No message to send */
826 ahc_outb(ahc, SXFRCTL1, ahc_inb(ahc, SXFRCTL1) & ~BITBUCKET);
827 ahc_outb(ahc, LASTPHASE, P_BUSFREE);
828 ahc_outb(ahc, SAVED_SCSIID, 0xFF);
829 ahc_outb(ahc, SAVED_LUN, 0xFF);
830
831 /*
832 * Ensure that the sequencer's idea of TQINPOS
833 * matches our own. The sequencer increments TQINPOS
834 * only after it sees a DMA complete and a reset could
835 * occur before the increment leaving the kernel to believe
836 * the command arrived but the sequencer to not.
837 */
838 ahc_outb(ahc, TQINPOS, ahc->tqinfifonext);
839
840 /* Always allow reselection */
841 ahc_outb(ahc, SCSISEQ,
842 ahc_inb(ahc, SCSISEQ_TEMPLATE) & (ENSELI|ENRSELI|ENAUTOATNP));
843 if ((ahc->features & AHC_CMD_CHAN) != 0) {
844 /* Ensure that no DMA operations are in progress */
845 ahc_outb(ahc, CCSCBCNT, 0);
846 ahc_outb(ahc, CCSGCTL, 0);
847 ahc_outb(ahc, CCSCBCTL, 0);
848 }
849 /*
850 * If we were in the process of DMA'ing SCB data into
851 * an SCB, replace that SCB on the free list. This prevents
852 * an SCB leak.
853 */
854 if ((ahc_inb(ahc, SEQ_FLAGS2) & SCB_DMA) != 0) {
855 ahc_add_curscb_to_free_list(ahc);
856 ahc_outb(ahc, SEQ_FLAGS2,
857 ahc_inb(ahc, SEQ_FLAGS2) & ~SCB_DMA);
858 }
859
860 /*
861 * Clear any pending sequencer interrupt. It is no
862 * longer relevant since we're resetting the Program
863 * Counter.
864 */
865 ahc_outb(ahc, CLRINT, CLRSEQINT);
866
867 ahc_outb(ahc, MWI_RESIDUAL, 0);
868 ahc_outb(ahc, SEQCTL, ahc->seqctl);
869 ahc_outb(ahc, SEQADDR0, 0);
870 ahc_outb(ahc, SEQADDR1, 0);
871
872 /*
873 * Take the LED out of diagnostic mode on PM resume, too
874 */
875 sblkctl = ahc_inb(ahc, SBLKCTL);
876 ahc_outb(ahc, SBLKCTL, (sblkctl & ~(DIAGLEDEN|DIAGLEDON)));
877
878 ahc_unpause(ahc);
879 }
880
881 /************************* Input/Output Queues ********************************/
882 static void
883 ahc_run_qoutfifo(struct ahc_softc *ahc)
884 {
885 struct scb *scb;
886 u_int scb_index;
887
888 ahc_sync_qoutfifo(ahc, BUS_DMASYNC_POSTREAD);
889 while (ahc->qoutfifo[ahc->qoutfifonext] != SCB_LIST_NULL) {
890
891 scb_index = ahc->qoutfifo[ahc->qoutfifonext];
892 if ((ahc->qoutfifonext & 0x03) == 0x03) {
893 u_int modnext;
894
895 /*
896 * Clear 32bits of QOUTFIFO at a time
897 * so that we don't clobber an incoming
898 * byte DMA to the array on architectures
899 * that only support 32bit load and store
900 * operations.
901 */
902 modnext = ahc->qoutfifonext & ~0x3;
903 *((uint32_t *)(&ahc->qoutfifo[modnext])) = 0xFFFFFFFFUL;
904 ahc_dmamap_sync(ahc, ahc->shared_data_dmat,
905 ahc->shared_data_dmamap,
906 /*offset*/modnext, /*len*/4,
907 BUS_DMASYNC_PREREAD);
908 }
909 ahc->qoutfifonext++;
910
911 scb = ahc_lookup_scb(ahc, scb_index);
912 if (scb == NULL) {
913 printk("%s: WARNING no command for scb %d "
914 "(cmdcmplt)\nQOUTPOS = %d\n",
915 ahc_name(ahc), scb_index,
916 (ahc->qoutfifonext - 1) & 0xFF);
917 continue;
918 }
919
920 /*
921 * Save off the residual
922 * if there is one.
923 */
924 ahc_update_residual(ahc, scb);
925 ahc_done(ahc, scb);
926 }
927 }
928
929 static void
930 ahc_run_untagged_queues(struct ahc_softc *ahc)
931 {
932 int i;
933
934 for (i = 0; i < 16; i++)
935 ahc_run_untagged_queue(ahc, &ahc->untagged_queues[i]);
936 }
937
938 static void
939 ahc_run_untagged_queue(struct ahc_softc *ahc, struct scb_tailq *queue)
940 {
941 struct scb *scb;
942
943 if (ahc->untagged_queue_lock != 0)
944 return;
945
946 if ((scb = TAILQ_FIRST(queue)) != NULL
947 && (scb->flags & SCB_ACTIVE) == 0) {
948 scb->flags |= SCB_ACTIVE;
949 ahc_queue_scb(ahc, scb);
950 }
951 }
952
953 /************************* Interrupt Handling *********************************/
954 static void
955 ahc_handle_brkadrint(struct ahc_softc *ahc)
956 {
957 /*
958 * We upset the sequencer :-(
959 * Lookup the error message
960 */
961 int i;
962 int error;
963
964 error = ahc_inb(ahc, ERROR);
965 for (i = 0; error != 1 && i < num_errors; i++)
966 error >>= 1;
967 printk("%s: brkadrint, %s at seqaddr = 0x%x\n",
968 ahc_name(ahc), ahc_hard_errors[i].errmesg,
969 ahc_inb(ahc, SEQADDR0) |
970 (ahc_inb(ahc, SEQADDR1) << 8));
971
972 ahc_dump_card_state(ahc);
973
974 /* Tell everyone that this HBA is no longer available */
975 ahc_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
976 CAM_LUN_WILDCARD, SCB_LIST_NULL, ROLE_UNKNOWN,
977 CAM_NO_HBA);
978
979 /* Disable all interrupt sources by resetting the controller */
980 ahc_shutdown(ahc);
981 }
982
983 static void
984 ahc_handle_seqint(struct ahc_softc *ahc, u_int intstat)
985 {
986 struct scb *scb;
987 struct ahc_devinfo devinfo;
988
989 ahc_fetch_devinfo(ahc, &devinfo);
990
991 /*
992 * Clear the upper byte that holds SEQINT status
993 * codes and clear the SEQINT bit. We will unpause
994 * the sequencer, if appropriate, after servicing
995 * the request.
996 */
997 ahc_outb(ahc, CLRINT, CLRSEQINT);
998 switch (intstat & SEQINT_MASK) {
999 case BAD_STATUS:
1000 {
1001 u_int scb_index;
1002 struct hardware_scb *hscb;
1003
1004 /*
1005 * Set the default return value to 0 (don't
1006 * send sense). The sense code will change
1007 * this if needed.
1008 */
1009 ahc_outb(ahc, RETURN_1, 0);
1010
1011 /*
1012 * The sequencer will notify us when a command
1013 * has an error that would be of interest to
1014 * the kernel. This allows us to leave the sequencer
1015 * running in the common case of command completes
1016 * without error. The sequencer will already have
1017 * dma'd the SCB back up to us, so we can reference
1018 * the in kernel copy directly.
1019 */
1020 scb_index = ahc_inb(ahc, SCB_TAG);
1021 scb = ahc_lookup_scb(ahc, scb_index);
1022 if (scb == NULL) {
1023 ahc_print_devinfo(ahc, &devinfo);
1024 printk("ahc_intr - referenced scb "
1025 "not valid during seqint 0x%x scb(%d)\n",
1026 intstat, scb_index);
1027 ahc_dump_card_state(ahc);
1028 panic("for safety");
1029 goto unpause;
1030 }
1031
1032 hscb = scb->hscb;
1033
1034 /* Don't want to clobber the original sense code */
1035 if ((scb->flags & SCB_SENSE) != 0) {
1036 /*
1037 * Clear the SCB_SENSE Flag and have
1038 * the sequencer do a normal command
1039 * complete.
1040 */
1041 scb->flags &= ~SCB_SENSE;
1042 ahc_set_transaction_status(scb, CAM_AUTOSENSE_FAIL);
1043 break;
1044 }
1045 ahc_set_transaction_status(scb, CAM_SCSI_STATUS_ERROR);
1046 /* Freeze the queue until the client sees the error. */
1047 ahc_freeze_devq(ahc, scb);
1048 ahc_freeze_scb(scb);
1049 ahc_set_scsi_status(scb, hscb->shared_data.status.scsi_status);
1050 switch (hscb->shared_data.status.scsi_status) {
1051 case SCSI_STATUS_OK:
1052 printk("%s: Interrupted for staus of 0???\n",
1053 ahc_name(ahc));
1054 break;
1055 case SCSI_STATUS_CMD_TERMINATED:
1056 case SCSI_STATUS_CHECK_COND:
1057 {
1058 struct ahc_dma_seg *sg;
1059 struct scsi_sense *sc;
1060 struct ahc_initiator_tinfo *targ_info;
1061 struct ahc_tmode_tstate *tstate;
1062 struct ahc_transinfo *tinfo;
1063 #ifdef AHC_DEBUG
1064 if (ahc_debug & AHC_SHOW_SENSE) {
1065 ahc_print_path(ahc, scb);
1066 printk("SCB %d: requests Check Status\n",
1067 scb->hscb->tag);
1068 }
1069 #endif
1070
1071 if (ahc_perform_autosense(scb) == 0)
1072 break;
1073
1074 targ_info = ahc_fetch_transinfo(ahc,
1075 devinfo.channel,
1076 devinfo.our_scsiid,
1077 devinfo.target,
1078 &tstate);
1079 tinfo = &targ_info->curr;
1080 sg = scb->sg_list;
1081 sc = (struct scsi_sense *)(&hscb->shared_data.cdb);
1082 /*
1083 * Save off the residual if there is one.
1084 */
1085 ahc_update_residual(ahc, scb);
1086 #ifdef AHC_DEBUG
1087 if (ahc_debug & AHC_SHOW_SENSE) {
1088 ahc_print_path(ahc, scb);
1089 printk("Sending Sense\n");
1090 }
1091 #endif
1092 sg->addr = ahc_get_sense_bufaddr(ahc, scb);
1093 sg->len = ahc_get_sense_bufsize(ahc, scb);
1094 sg->len |= AHC_DMA_LAST_SEG;
1095
1096 /* Fixup byte order */
1097 sg->addr = ahc_htole32(sg->addr);
1098 sg->len = ahc_htole32(sg->len);
1099
1100 sc->opcode = REQUEST_SENSE;
1101 sc->byte2 = 0;
1102 if (tinfo->protocol_version <= SCSI_REV_2
1103 && SCB_GET_LUN(scb) < 8)
1104 sc->byte2 = SCB_GET_LUN(scb) << 5;
1105 sc->unused[0] = 0;
1106 sc->unused[1] = 0;
1107 sc->length = sg->len;
1108 sc->control = 0;
1109
1110 /*
1111 * We can't allow the target to disconnect.
1112 * This will be an untagged transaction and
1113 * having the target disconnect will make this
1114 * transaction indestinguishable from outstanding
1115 * tagged transactions.
1116 */
1117 hscb->control = 0;
1118
1119 /*
1120 * This request sense could be because the
1121 * the device lost power or in some other
1122 * way has lost our transfer negotiations.
1123 * Renegotiate if appropriate. Unit attention
1124 * errors will be reported before any data
1125 * phases occur.
1126 */
1127 if (ahc_get_residual(scb)
1128 == ahc_get_transfer_length(scb)) {
1129 ahc_update_neg_request(ahc, &devinfo,
1130 tstate, targ_info,
1131 AHC_NEG_IF_NON_ASYNC);
1132 }
1133 if (tstate->auto_negotiate & devinfo.target_mask) {
1134 hscb->control |= MK_MESSAGE;
1135 scb->flags &= ~SCB_NEGOTIATE;
1136 scb->flags |= SCB_AUTO_NEGOTIATE;
1137 }
1138 hscb->cdb_len = sizeof(*sc);
1139 hscb->dataptr = sg->addr;
1140 hscb->datacnt = sg->len;
1141 hscb->sgptr = scb->sg_list_phys | SG_FULL_RESID;
1142 hscb->sgptr = ahc_htole32(hscb->sgptr);
1143 scb->sg_count = 1;
1144 scb->flags |= SCB_SENSE;
1145 ahc_qinfifo_requeue_tail(ahc, scb);
1146 ahc_outb(ahc, RETURN_1, SEND_SENSE);
1147 /*
1148 * Ensure we have enough time to actually
1149 * retrieve the sense.
1150 */
1151 ahc_scb_timer_reset(scb, 5 * 1000000);
1152 break;
1153 }
1154 default:
1155 break;
1156 }
1157 break;
1158 }
1159 case NO_MATCH:
1160 {
1161 /* Ensure we don't leave the selection hardware on */
1162 ahc_outb(ahc, SCSISEQ,
1163 ahc_inb(ahc, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP));
1164
1165 printk("%s:%c:%d: no active SCB for reconnecting "
1166 "target - issuing BUS DEVICE RESET\n",
1167 ahc_name(ahc), devinfo.channel, devinfo.target);
1168 printk("SAVED_SCSIID == 0x%x, SAVED_LUN == 0x%x, "
1169 "ARG_1 == 0x%x ACCUM = 0x%x\n",
1170 ahc_inb(ahc, SAVED_SCSIID), ahc_inb(ahc, SAVED_LUN),
1171 ahc_inb(ahc, ARG_1), ahc_inb(ahc, ACCUM));
1172 printk("SEQ_FLAGS == 0x%x, SCBPTR == 0x%x, BTT == 0x%x, "
1173 "SINDEX == 0x%x\n",
1174 ahc_inb(ahc, SEQ_FLAGS), ahc_inb(ahc, SCBPTR),
1175 ahc_index_busy_tcl(ahc,
1176 BUILD_TCL(ahc_inb(ahc, SAVED_SCSIID),
1177 ahc_inb(ahc, SAVED_LUN))),
1178 ahc_inb(ahc, SINDEX));
1179 printk("SCSIID == 0x%x, SCB_SCSIID == 0x%x, SCB_LUN == 0x%x, "
1180 "SCB_TAG == 0x%x, SCB_CONTROL == 0x%x\n",
1181 ahc_inb(ahc, SCSIID), ahc_inb(ahc, SCB_SCSIID),
1182 ahc_inb(ahc, SCB_LUN), ahc_inb(ahc, SCB_TAG),
1183 ahc_inb(ahc, SCB_CONTROL));
1184 printk("SCSIBUSL == 0x%x, SCSISIGI == 0x%x\n",
1185 ahc_inb(ahc, SCSIBUSL), ahc_inb(ahc, SCSISIGI));
1186 printk("SXFRCTL0 == 0x%x\n", ahc_inb(ahc, SXFRCTL0));
1187 printk("SEQCTL == 0x%x\n", ahc_inb(ahc, SEQCTL));
1188 ahc_dump_card_state(ahc);
1189 ahc->msgout_buf[0] = MSG_BUS_DEV_RESET;
1190 ahc->msgout_len = 1;
1191 ahc->msgout_index = 0;
1192 ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT;
1193 ahc_outb(ahc, MSG_OUT, HOST_MSG);
1194 ahc_assert_atn(ahc);
1195 break;
1196 }
1197 case SEND_REJECT:
1198 {
1199 u_int rejbyte = ahc_inb(ahc, ACCUM);
1200 printk("%s:%c:%d: Warning - unknown message received from "
1201 "target (0x%x). Rejecting\n",
1202 ahc_name(ahc), devinfo.channel, devinfo.target, rejbyte);
1203 break;
1204 }
1205 case PROTO_VIOLATION:
1206 {
1207 ahc_handle_proto_violation(ahc);
1208 break;
1209 }
1210 case IGN_WIDE_RES:
1211 ahc_handle_ign_wide_residue(ahc, &devinfo);
1212 break;
1213 case PDATA_REINIT:
1214 ahc_reinitialize_dataptrs(ahc);
1215 break;
1216 case BAD_PHASE:
1217 {
1218 u_int lastphase;
1219
1220 lastphase = ahc_inb(ahc, LASTPHASE);
1221 printk("%s:%c:%d: unknown scsi bus phase %x, "
1222 "lastphase = 0x%x. Attempting to continue\n",
1223 ahc_name(ahc), devinfo.channel, devinfo.target,
1224 lastphase, ahc_inb(ahc, SCSISIGI));
1225 break;
1226 }
1227 case MISSED_BUSFREE:
1228 {
1229 u_int lastphase;
1230
1231 lastphase = ahc_inb(ahc, LASTPHASE);
1232 printk("%s:%c:%d: Missed busfree. "
1233 "Lastphase = 0x%x, Curphase = 0x%x\n",
1234 ahc_name(ahc), devinfo.channel, devinfo.target,
1235 lastphase, ahc_inb(ahc, SCSISIGI));
1236 ahc_restart(ahc);
1237 return;
1238 }
1239 case HOST_MSG_LOOP:
1240 {
1241 /*
1242 * The sequencer has encountered a message phase
1243 * that requires host assistance for completion.
1244 * While handling the message phase(s), we will be
1245 * notified by the sequencer after each byte is
1246 * transferred so we can track bus phase changes.
1247 *
1248 * If this is the first time we've seen a HOST_MSG_LOOP
1249 * interrupt, initialize the state of the host message
1250 * loop.
1251 */
1252 if (ahc->msg_type == MSG_TYPE_NONE) {
1253 struct scb *scb;
1254 u_int scb_index;
1255 u_int bus_phase;
1256
1257 bus_phase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK;
1258 if (bus_phase != P_MESGIN
1259 && bus_phase != P_MESGOUT) {
1260 printk("ahc_intr: HOST_MSG_LOOP bad "
1261 "phase 0x%x\n",
1262 bus_phase);
1263 /*
1264 * Probably transitioned to bus free before
1265 * we got here. Just punt the message.
1266 */
1267 ahc_clear_intstat(ahc);
1268 ahc_restart(ahc);
1269 return;
1270 }
1271
1272 scb_index = ahc_inb(ahc, SCB_TAG);
1273 scb = ahc_lookup_scb(ahc, scb_index);
1274 if (devinfo.role == ROLE_INITIATOR) {
1275 if (bus_phase == P_MESGOUT) {
1276 if (scb == NULL)
1277 panic("HOST_MSG_LOOP with "
1278 "invalid SCB %x\n",
1279 scb_index);
1280
1281 ahc_setup_initiator_msgout(ahc,
1282 &devinfo,
1283 scb);
1284 } else {
1285 ahc->msg_type =
1286 MSG_TYPE_INITIATOR_MSGIN;
1287 ahc->msgin_index = 0;
1288 }
1289 }
1290 #ifdef AHC_TARGET_MODE
1291 else {
1292 if (bus_phase == P_MESGOUT) {
1293 ahc->msg_type =
1294 MSG_TYPE_TARGET_MSGOUT;
1295 ahc->msgin_index = 0;
1296 }
1297 else
1298 ahc_setup_target_msgin(ahc,
1299 &devinfo,
1300 scb);
1301 }
1302 #endif
1303 }
1304
1305 ahc_handle_message_phase(ahc);
1306 break;
1307 }
1308 case PERR_DETECTED:
1309 {
1310 /*
1311 * If we've cleared the parity error interrupt
1312 * but the sequencer still believes that SCSIPERR
1313 * is true, it must be that the parity error is
1314 * for the currently presented byte on the bus,
1315 * and we are not in a phase (data-in) where we will
1316 * eventually ack this byte. Ack the byte and
1317 * throw it away in the hope that the target will
1318 * take us to message out to deliver the appropriate
1319 * error message.
1320 */
1321 if ((intstat & SCSIINT) == 0
1322 && (ahc_inb(ahc, SSTAT1) & SCSIPERR) != 0) {
1323
1324 if ((ahc->features & AHC_DT) == 0) {
1325 u_int curphase;
1326
1327 /*
1328 * The hardware will only let you ack bytes
1329 * if the expected phase in SCSISIGO matches
1330 * the current phase. Make sure this is
1331 * currently the case.
1332 */
1333 curphase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK;
1334 ahc_outb(ahc, LASTPHASE, curphase);
1335 ahc_outb(ahc, SCSISIGO, curphase);
1336 }
1337 if ((ahc_inb(ahc, SCSISIGI) & (CDI|MSGI)) == 0) {
1338 int wait;
1339
1340 /*
1341 * In a data phase. Faster to bitbucket
1342 * the data than to individually ack each
1343 * byte. This is also the only strategy
1344 * that will work with AUTOACK enabled.
1345 */
1346 ahc_outb(ahc, SXFRCTL1,
1347 ahc_inb(ahc, SXFRCTL1) | BITBUCKET);
1348 wait = 5000;
1349 while (--wait != 0) {
1350 if ((ahc_inb(ahc, SCSISIGI)
1351 & (CDI|MSGI)) != 0)
1352 break;
1353 ahc_delay(100);
1354 }
1355 ahc_outb(ahc, SXFRCTL1,
1356 ahc_inb(ahc, SXFRCTL1) & ~BITBUCKET);
1357 if (wait == 0) {
1358 struct scb *scb;
1359 u_int scb_index;
1360
1361 ahc_print_devinfo(ahc, &devinfo);
1362 printk("Unable to clear parity error. "
1363 "Resetting bus.\n");
1364 scb_index = ahc_inb(ahc, SCB_TAG);
1365 scb = ahc_lookup_scb(ahc, scb_index);
1366 if (scb != NULL)
1367 ahc_set_transaction_status(scb,
1368 CAM_UNCOR_PARITY);
1369 ahc_reset_channel(ahc, devinfo.channel,
1370 /*init reset*/TRUE);
1371 }
1372 } else {
1373 ahc_inb(ahc, SCSIDATL);
1374 }
1375 }
1376 break;
1377 }
1378 case DATA_OVERRUN:
1379 {
1380 /*
1381 * When the sequencer detects an overrun, it
1382 * places the controller in "BITBUCKET" mode
1383 * and allows the target to complete its transfer.
1384 * Unfortunately, none of the counters get updated
1385 * when the controller is in this mode, so we have
1386 * no way of knowing how large the overrun was.
1387 */
1388 u_int scbindex = ahc_inb(ahc, SCB_TAG);
1389 u_int lastphase = ahc_inb(ahc, LASTPHASE);
1390 u_int i;
1391
1392 scb = ahc_lookup_scb(ahc, scbindex);
1393 for (i = 0; i < num_phases; i++) {
1394 if (lastphase == ahc_phase_table[i].phase)
1395 break;
1396 }
1397 ahc_print_path(ahc, scb);
1398 printk("data overrun detected %s."
1399 " Tag == 0x%x.\n",
1400 ahc_phase_table[i].phasemsg,
1401 scb->hscb->tag);
1402 ahc_print_path(ahc, scb);
1403 printk("%s seen Data Phase. Length = %ld. NumSGs = %d.\n",
1404 ahc_inb(ahc, SEQ_FLAGS) & DPHASE ? "Have" : "Haven't",
1405 ahc_get_transfer_length(scb), scb->sg_count);
1406 if (scb->sg_count > 0) {
1407 for (i = 0; i < scb->sg_count; i++) {
1408
1409 printk("sg[%d] - Addr 0x%x%x : Length %d\n",
1410 i,
1411 (ahc_le32toh(scb->sg_list[i].len) >> 24
1412 & SG_HIGH_ADDR_BITS),
1413 ahc_le32toh(scb->sg_list[i].addr),
1414 ahc_le32toh(scb->sg_list[i].len)
1415 & AHC_SG_LEN_MASK);
1416 }
1417 }
1418 /*
1419 * Set this and it will take effect when the
1420 * target does a command complete.
1421 */
1422 ahc_freeze_devq(ahc, scb);
1423 if ((scb->flags & SCB_SENSE) == 0) {
1424 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1425 } else {
1426 scb->flags &= ~SCB_SENSE;
1427 ahc_set_transaction_status(scb, CAM_AUTOSENSE_FAIL);
1428 }
1429 ahc_freeze_scb(scb);
1430
1431 if ((ahc->features & AHC_ULTRA2) != 0) {
1432 /*
1433 * Clear the channel in case we return
1434 * to data phase later.
1435 */
1436 ahc_outb(ahc, SXFRCTL0,
1437 ahc_inb(ahc, SXFRCTL0) | CLRSTCNT|CLRCHN);
1438 ahc_outb(ahc, SXFRCTL0,
1439 ahc_inb(ahc, SXFRCTL0) | CLRSTCNT|CLRCHN);
1440 }
1441 if ((ahc->flags & AHC_39BIT_ADDRESSING) != 0) {
1442 u_int dscommand1;
1443
1444 /* Ensure HHADDR is 0 for future DMA operations. */
1445 dscommand1 = ahc_inb(ahc, DSCOMMAND1);
1446 ahc_outb(ahc, DSCOMMAND1, dscommand1 | HADDLDSEL0);
1447 ahc_outb(ahc, HADDR, 0);
1448 ahc_outb(ahc, DSCOMMAND1, dscommand1);
1449 }
1450 break;
1451 }
1452 case MKMSG_FAILED:
1453 {
1454 u_int scbindex;
1455
1456 printk("%s:%c:%d:%d: Attempt to issue message failed\n",
1457 ahc_name(ahc), devinfo.channel, devinfo.target,
1458 devinfo.lun);
1459 scbindex = ahc_inb(ahc, SCB_TAG);
1460 scb = ahc_lookup_scb(ahc, scbindex);
1461 if (scb != NULL
1462 && (scb->flags & SCB_RECOVERY_SCB) != 0)
1463 /*
1464 * Ensure that we didn't put a second instance of this
1465 * SCB into the QINFIFO.
1466 */
1467 ahc_search_qinfifo(ahc, SCB_GET_TARGET(ahc, scb),
1468 SCB_GET_CHANNEL(ahc, scb),
1469 SCB_GET_LUN(scb), scb->hscb->tag,
1470 ROLE_INITIATOR, /*status*/0,
1471 SEARCH_REMOVE);
1472 break;
1473 }
1474 case NO_FREE_SCB:
1475 {
1476 printk("%s: No free or disconnected SCBs\n", ahc_name(ahc));
1477 ahc_dump_card_state(ahc);
1478 panic("for safety");
1479 break;
1480 }
1481 case SCB_MISMATCH:
1482 {
1483 u_int scbptr;
1484
1485 scbptr = ahc_inb(ahc, SCBPTR);
1486 printk("Bogus TAG after DMA. SCBPTR %d, tag %d, our tag %d\n",
1487 scbptr, ahc_inb(ahc, ARG_1),
1488 ahc->scb_data->hscbs[scbptr].tag);
1489 ahc_dump_card_state(ahc);
1490 panic("for safety");
1491 break;
1492 }
1493 case OUT_OF_RANGE:
1494 {
1495 printk("%s: BTT calculation out of range\n", ahc_name(ahc));
1496 printk("SAVED_SCSIID == 0x%x, SAVED_LUN == 0x%x, "
1497 "ARG_1 == 0x%x ACCUM = 0x%x\n",
1498 ahc_inb(ahc, SAVED_SCSIID), ahc_inb(ahc, SAVED_LUN),
1499 ahc_inb(ahc, ARG_1), ahc_inb(ahc, ACCUM));
1500 printk("SEQ_FLAGS == 0x%x, SCBPTR == 0x%x, BTT == 0x%x, "
1501 "SINDEX == 0x%x\n, A == 0x%x\n",
1502 ahc_inb(ahc, SEQ_FLAGS), ahc_inb(ahc, SCBPTR),
1503 ahc_index_busy_tcl(ahc,
1504 BUILD_TCL(ahc_inb(ahc, SAVED_SCSIID),
1505 ahc_inb(ahc, SAVED_LUN))),
1506 ahc_inb(ahc, SINDEX),
1507 ahc_inb(ahc, ACCUM));
1508 printk("SCSIID == 0x%x, SCB_SCSIID == 0x%x, SCB_LUN == 0x%x, "
1509 "SCB_TAG == 0x%x, SCB_CONTROL == 0x%x\n",
1510 ahc_inb(ahc, SCSIID), ahc_inb(ahc, SCB_SCSIID),
1511 ahc_inb(ahc, SCB_LUN), ahc_inb(ahc, SCB_TAG),
1512 ahc_inb(ahc, SCB_CONTROL));
1513 printk("SCSIBUSL == 0x%x, SCSISIGI == 0x%x\n",
1514 ahc_inb(ahc, SCSIBUSL), ahc_inb(ahc, SCSISIGI));
1515 ahc_dump_card_state(ahc);
1516 panic("for safety");
1517 break;
1518 }
1519 default:
1520 printk("ahc_intr: seqint, "
1521 "intstat == 0x%x, scsisigi = 0x%x\n",
1522 intstat, ahc_inb(ahc, SCSISIGI));
1523 break;
1524 }
1525 unpause:
1526 /*
1527 * The sequencer is paused immediately on
1528 * a SEQINT, so we should restart it when
1529 * we're done.
1530 */
1531 ahc_unpause(ahc);
1532 }
1533
1534 static void
1535 ahc_handle_scsiint(struct ahc_softc *ahc, u_int intstat)
1536 {
1537 u_int scb_index;
1538 u_int status0;
1539 u_int status;
1540 struct scb *scb;
1541 char cur_channel;
1542 char intr_channel;
1543
1544 if ((ahc->features & AHC_TWIN) != 0
1545 && ((ahc_inb(ahc, SBLKCTL) & SELBUSB) != 0))
1546 cur_channel = 'B';
1547 else
1548 cur_channel = 'A';
1549 intr_channel = cur_channel;
1550
1551 if ((ahc->features & AHC_ULTRA2) != 0)
1552 status0 = ahc_inb(ahc, SSTAT0) & IOERR;
1553 else
1554 status0 = 0;
1555 status = ahc_inb(ahc, SSTAT1) & (SELTO|SCSIRSTI|BUSFREE|SCSIPERR);
1556 if (status == 0 && status0 == 0) {
1557 if ((ahc->features & AHC_TWIN) != 0) {
1558 /* Try the other channel */
1559 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) ^ SELBUSB);
1560 status = ahc_inb(ahc, SSTAT1)
1561 & (SELTO|SCSIRSTI|BUSFREE|SCSIPERR);
1562 intr_channel = (cur_channel == 'A') ? 'B' : 'A';
1563 }
1564 if (status == 0) {
1565 printk("%s: Spurious SCSI interrupt\n", ahc_name(ahc));
1566 ahc_outb(ahc, CLRINT, CLRSCSIINT);
1567 ahc_unpause(ahc);
1568 return;
1569 }
1570 }
1571
1572 /* Make sure the sequencer is in a safe location. */
1573 ahc_clear_critical_section(ahc);
1574
1575 scb_index = ahc_inb(ahc, SCB_TAG);
1576 scb = ahc_lookup_scb(ahc, scb_index);
1577 if (scb != NULL
1578 && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) != 0)
1579 scb = NULL;
1580
1581 if ((ahc->features & AHC_ULTRA2) != 0
1582 && (status0 & IOERR) != 0) {
1583 int now_lvd;
1584
1585 now_lvd = ahc_inb(ahc, SBLKCTL) & ENAB40;
1586 printk("%s: Transceiver State Has Changed to %s mode\n",
1587 ahc_name(ahc), now_lvd ? "LVD" : "SE");
1588 ahc_outb(ahc, CLRSINT0, CLRIOERR);
1589 /*
1590 * When transitioning to SE mode, the reset line
1591 * glitches, triggering an arbitration bug in some
1592 * Ultra2 controllers. This bug is cleared when we
1593 * assert the reset line. Since a reset glitch has
1594 * already occurred with this transition and a
1595 * transceiver state change is handled just like
1596 * a bus reset anyway, asserting the reset line
1597 * ourselves is safe.
1598 */
1599 ahc_reset_channel(ahc, intr_channel,
1600 /*Initiate Reset*/now_lvd == 0);
1601 } else if ((status & SCSIRSTI) != 0) {
1602 printk("%s: Someone reset channel %c\n",
1603 ahc_name(ahc), intr_channel);
1604 if (intr_channel != cur_channel)
1605 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) ^ SELBUSB);
1606 ahc_reset_channel(ahc, intr_channel, /*Initiate Reset*/FALSE);
1607 } else if ((status & SCSIPERR) != 0) {
1608 /*
1609 * Determine the bus phase and queue an appropriate message.
1610 * SCSIPERR is latched true as soon as a parity error
1611 * occurs. If the sequencer acked the transfer that
1612 * caused the parity error and the currently presented
1613 * transfer on the bus has correct parity, SCSIPERR will
1614 * be cleared by CLRSCSIPERR. Use this to determine if
1615 * we should look at the last phase the sequencer recorded,
1616 * or the current phase presented on the bus.
1617 */
1618 struct ahc_devinfo devinfo;
1619 u_int mesg_out;
1620 u_int curphase;
1621 u_int errorphase;
1622 u_int lastphase;
1623 u_int scsirate;
1624 u_int i;
1625 u_int sstat2;
1626 int silent;
1627
1628 lastphase = ahc_inb(ahc, LASTPHASE);
1629 curphase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK;
1630 sstat2 = ahc_inb(ahc, SSTAT2);
1631 ahc_outb(ahc, CLRSINT1, CLRSCSIPERR);
1632 /*
1633 * For all phases save DATA, the sequencer won't
1634 * automatically ack a byte that has a parity error
1635 * in it. So the only way that the current phase
1636 * could be 'data-in' is if the parity error is for
1637 * an already acked byte in the data phase. During
1638 * synchronous data-in transfers, we may actually
1639 * ack bytes before latching the current phase in
1640 * LASTPHASE, leading to the discrepancy between
1641 * curphase and lastphase.
1642 */
1643 if ((ahc_inb(ahc, SSTAT1) & SCSIPERR) != 0
1644 || curphase == P_DATAIN || curphase == P_DATAIN_DT)
1645 errorphase = curphase;
1646 else
1647 errorphase = lastphase;
1648
1649 for (i = 0; i < num_phases; i++) {
1650 if (errorphase == ahc_phase_table[i].phase)
1651 break;
1652 }
1653 mesg_out = ahc_phase_table[i].mesg_out;
1654 silent = FALSE;
1655 if (scb != NULL) {
1656 if (SCB_IS_SILENT(scb))
1657 silent = TRUE;
1658 else
1659 ahc_print_path(ahc, scb);
1660 scb->flags |= SCB_TRANSMISSION_ERROR;
1661 } else
1662 printk("%s:%c:%d: ", ahc_name(ahc), intr_channel,
1663 SCSIID_TARGET(ahc, ahc_inb(ahc, SAVED_SCSIID)));
1664 scsirate = ahc_inb(ahc, SCSIRATE);
1665 if (silent == FALSE) {
1666 printk("parity error detected %s. "
1667 "SEQADDR(0x%x) SCSIRATE(0x%x)\n",
1668 ahc_phase_table[i].phasemsg,
1669 ahc_inw(ahc, SEQADDR0),
1670 scsirate);
1671 if ((ahc->features & AHC_DT) != 0) {
1672 if ((sstat2 & CRCVALERR) != 0)
1673 printk("\tCRC Value Mismatch\n");
1674 if ((sstat2 & CRCENDERR) != 0)
1675 printk("\tNo terminal CRC packet "
1676 "recevied\n");
1677 if ((sstat2 & CRCREQERR) != 0)
1678 printk("\tIllegal CRC packet "
1679 "request\n");
1680 if ((sstat2 & DUAL_EDGE_ERR) != 0)
1681 printk("\tUnexpected %sDT Data Phase\n",
1682 (scsirate & SINGLE_EDGE)
1683 ? "" : "non-");
1684 }
1685 }
1686
1687 if ((ahc->features & AHC_DT) != 0
1688 && (sstat2 & DUAL_EDGE_ERR) != 0) {
1689 /*
1690 * This error applies regardless of
1691 * data direction, so ignore the value
1692 * in the phase table.
1693 */
1694 mesg_out = MSG_INITIATOR_DET_ERR;
1695 }
1696
1697 /*
1698 * We've set the hardware to assert ATN if we
1699 * get a parity error on "in" phases, so all we
1700 * need to do is stuff the message buffer with
1701 * the appropriate message. "In" phases have set
1702 * mesg_out to something other than MSG_NOP.
1703 */
1704 if (mesg_out != MSG_NOOP) {
1705 if (ahc->msg_type != MSG_TYPE_NONE)
1706 ahc->send_msg_perror = TRUE;
1707 else
1708 ahc_outb(ahc, MSG_OUT, mesg_out);
1709 }
1710 /*
1711 * Force a renegotiation with this target just in
1712 * case we are out of sync for some external reason
1713 * unknown (or unreported) by the target.
1714 */
1715 ahc_fetch_devinfo(ahc, &devinfo);
1716 ahc_force_renegotiation(ahc, &devinfo);
1717
1718 ahc_outb(ahc, CLRINT, CLRSCSIINT);
1719 ahc_unpause(ahc);
1720 } else if ((status & SELTO) != 0) {
1721 u_int scbptr;
1722
1723 /* Stop the selection */
1724 ahc_outb(ahc, SCSISEQ, 0);
1725
1726 /* No more pending messages */
1727 ahc_clear_msg_state(ahc);
1728
1729 /* Clear interrupt state */
1730 ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENBUSFREE);
1731 ahc_outb(ahc, CLRSINT1, CLRSELTIMEO|CLRBUSFREE|CLRSCSIPERR);
1732
1733 /*
1734 * Although the driver does not care about the
1735 * 'Selection in Progress' status bit, the busy
1736 * LED does. SELINGO is only cleared by a successful
1737 * selection, so we must manually clear it to insure
1738 * the LED turns off just incase no future successful
1739 * selections occur (e.g. no devices on the bus).
1740 */
1741 ahc_outb(ahc, CLRSINT0, CLRSELINGO);
1742
1743 scbptr = ahc_inb(ahc, WAITING_SCBH);
1744 ahc_outb(ahc, SCBPTR, scbptr);
1745 scb_index = ahc_inb(ahc, SCB_TAG);
1746
1747 scb = ahc_lookup_scb(ahc, scb_index);
1748 if (scb == NULL) {
1749 printk("%s: ahc_intr - referenced scb not "
1750 "valid during SELTO scb(%d, %d)\n",
1751 ahc_name(ahc), scbptr, scb_index);
1752 ahc_dump_card_state(ahc);
1753 } else {
1754 struct ahc_devinfo devinfo;
1755 #ifdef AHC_DEBUG
1756 if ((ahc_debug & AHC_SHOW_SELTO) != 0) {
1757 ahc_print_path(ahc, scb);
1758 printk("Saw Selection Timeout for SCB 0x%x\n",
1759 scb_index);
1760 }
1761 #endif
1762 ahc_scb_devinfo(ahc, &devinfo, scb);
1763 ahc_set_transaction_status(scb, CAM_SEL_TIMEOUT);
1764 ahc_freeze_devq(ahc, scb);
1765
1766 /*
1767 * Cancel any pending transactions on the device
1768 * now that it seems to be missing. This will
1769 * also revert us to async/narrow transfers until
1770 * we can renegotiate with the device.
1771 */
1772 ahc_handle_devreset(ahc, &devinfo,
1773 CAM_SEL_TIMEOUT,
1774 "Selection Timeout",
1775 /*verbose_level*/1);
1776 }
1777 ahc_outb(ahc, CLRINT, CLRSCSIINT);
1778 ahc_restart(ahc);
1779 } else if ((status & BUSFREE) != 0
1780 && (ahc_inb(ahc, SIMODE1) & ENBUSFREE) != 0) {
1781 struct ahc_devinfo devinfo;
1782 u_int lastphase;
1783 u_int saved_scsiid;
1784 u_int saved_lun;
1785 u_int target;
1786 u_int initiator_role_id;
1787 char channel;
1788 int printerror;
1789
1790 /*
1791 * Clear our selection hardware as soon as possible.
1792 * We may have an entry in the waiting Q for this target,
1793 * that is affected by this busfree and we don't want to
1794 * go about selecting the target while we handle the event.
1795 */
1796 ahc_outb(ahc, SCSISEQ,
1797 ahc_inb(ahc, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP));
1798
1799 /*
1800 * Disable busfree interrupts and clear the busfree
1801 * interrupt status. We do this here so that several
1802 * bus transactions occur prior to clearing the SCSIINT
1803 * latch. It can take a bit for the clearing to take effect.
1804 */
1805 ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENBUSFREE);
1806 ahc_outb(ahc, CLRSINT1, CLRBUSFREE|CLRSCSIPERR);
1807
1808 /*
1809 * Look at what phase we were last in.
1810 * If its message out, chances are pretty good
1811 * that the busfree was in response to one of
1812 * our abort requests.
1813 */
1814 lastphase = ahc_inb(ahc, LASTPHASE);
1815 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
1816 saved_lun = ahc_inb(ahc, SAVED_LUN);
1817 target = SCSIID_TARGET(ahc, saved_scsiid);
1818 initiator_role_id = SCSIID_OUR_ID(saved_scsiid);
1819 channel = SCSIID_CHANNEL(ahc, saved_scsiid);
1820 ahc_compile_devinfo(&devinfo, initiator_role_id,
1821 target, saved_lun, channel, ROLE_INITIATOR);
1822 printerror = 1;
1823
1824 if (lastphase == P_MESGOUT) {
1825 u_int tag;
1826
1827 tag = SCB_LIST_NULL;
1828 if (ahc_sent_msg(ahc, AHCMSG_1B, MSG_ABORT_TAG, TRUE)
1829 || ahc_sent_msg(ahc, AHCMSG_1B, MSG_ABORT, TRUE)) {
1830 if (ahc->msgout_buf[ahc->msgout_index - 1]
1831 == MSG_ABORT_TAG)
1832 tag = scb->hscb->tag;
1833 ahc_print_path(ahc, scb);
1834 printk("SCB %d - Abort%s Completed.\n",
1835 scb->hscb->tag, tag == SCB_LIST_NULL ?
1836 "" : " Tag");
1837 ahc_abort_scbs(ahc, target, channel,
1838 saved_lun, tag,
1839 ROLE_INITIATOR,
1840 CAM_REQ_ABORTED);
1841 printerror = 0;
1842 } else if (ahc_sent_msg(ahc, AHCMSG_1B,
1843 MSG_BUS_DEV_RESET, TRUE)) {
1844 #ifdef __FreeBSD__
1845 /*
1846 * Don't mark the user's request for this BDR
1847 * as completing with CAM_BDR_SENT. CAM3
1848 * specifies CAM_REQ_CMP.
1849 */
1850 if (scb != NULL
1851 && scb->io_ctx->ccb_h.func_code== XPT_RESET_DEV
1852 && ahc_match_scb(ahc, scb, target, channel,
1853 CAM_LUN_WILDCARD,
1854 SCB_LIST_NULL,
1855 ROLE_INITIATOR)) {
1856 ahc_set_transaction_status(scb, CAM_REQ_CMP);
1857 }
1858 #endif
1859 ahc_compile_devinfo(&devinfo,
1860 initiator_role_id,
1861 target,
1862 CAM_LUN_WILDCARD,
1863 channel,
1864 ROLE_INITIATOR);
1865 ahc_handle_devreset(ahc, &devinfo,
1866 CAM_BDR_SENT,
1867 "Bus Device Reset",
1868 /*verbose_level*/0);
1869 printerror = 0;
1870 } else if (ahc_sent_msg(ahc, AHCMSG_EXT,
1871 MSG_EXT_PPR, FALSE)) {
1872 struct ahc_initiator_tinfo *tinfo;
1873 struct ahc_tmode_tstate *tstate;
1874
1875 /*
1876 * PPR Rejected. Try non-ppr negotiation
1877 * and retry command.
1878 */
1879 tinfo = ahc_fetch_transinfo(ahc,
1880 devinfo.channel,
1881 devinfo.our_scsiid,
1882 devinfo.target,
1883 &tstate);
1884 tinfo->curr.transport_version = 2;
1885 tinfo->goal.transport_version = 2;
1886 tinfo->goal.ppr_options = 0;
1887 ahc_qinfifo_requeue_tail(ahc, scb);
1888 printerror = 0;
1889 } else if (ahc_sent_msg(ahc, AHCMSG_EXT,
1890 MSG_EXT_WDTR, FALSE)) {
1891 /*
1892 * Negotiation Rejected. Go-narrow and
1893 * retry command.
1894 */
1895 ahc_set_width(ahc, &devinfo,
1896 MSG_EXT_WDTR_BUS_8_BIT,
1897 AHC_TRANS_CUR|AHC_TRANS_GOAL,
1898 /*paused*/TRUE);
1899 ahc_qinfifo_requeue_tail(ahc, scb);
1900 printerror = 0;
1901 } else if (ahc_sent_msg(ahc, AHCMSG_EXT,
1902 MSG_EXT_SDTR, FALSE)) {
1903 /*
1904 * Negotiation Rejected. Go-async and
1905 * retry command.
1906 */
1907 ahc_set_syncrate(ahc, &devinfo,
1908 /*syncrate*/NULL,
1909 /*period*/0, /*offset*/0,
1910 /*ppr_options*/0,
1911 AHC_TRANS_CUR|AHC_TRANS_GOAL,
1912 /*paused*/TRUE);
1913 ahc_qinfifo_requeue_tail(ahc, scb);
1914 printerror = 0;
1915 }
1916 }
1917 if (printerror != 0) {
1918 u_int i;
1919
1920 if (scb != NULL) {
1921 u_int tag;
1922
1923 if ((scb->hscb->control & TAG_ENB) != 0)
1924 tag = scb->hscb->tag;
1925 else
1926 tag = SCB_LIST_NULL;
1927 ahc_print_path(ahc, scb);
1928 ahc_abort_scbs(ahc, target, channel,
1929 SCB_GET_LUN(scb), tag,
1930 ROLE_INITIATOR,
1931 CAM_UNEXP_BUSFREE);
1932 } else {
1933 /*
1934 * We had not fully identified this connection,
1935 * so we cannot abort anything.
1936 */
1937 printk("%s: ", ahc_name(ahc));
1938 }
1939 for (i = 0; i < num_phases; i++) {
1940 if (lastphase == ahc_phase_table[i].phase)
1941 break;
1942 }
1943 if (lastphase != P_BUSFREE) {
1944 /*
1945 * Renegotiate with this device at the
1946 * next opportunity just in case this busfree
1947 * is due to a negotiation mismatch with the
1948 * device.
1949 */
1950 ahc_force_renegotiation(ahc, &devinfo);
1951 }
1952 printk("Unexpected busfree %s\n"
1953 "SEQADDR == 0x%x\n",
1954 ahc_phase_table[i].phasemsg,
1955 ahc_inb(ahc, SEQADDR0)
1956 | (ahc_inb(ahc, SEQADDR1) << 8));
1957 }
1958 ahc_outb(ahc, CLRINT, CLRSCSIINT);
1959 ahc_restart(ahc);
1960 } else {
1961 printk("%s: Missing case in ahc_handle_scsiint. status = %x\n",
1962 ahc_name(ahc), status);
1963 ahc_outb(ahc, CLRINT, CLRSCSIINT);
1964 }
1965 }
1966
1967 /*
1968 * Force renegotiation to occur the next time we initiate
1969 * a command to the current device.
1970 */
1971 static void
1972 ahc_force_renegotiation(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
1973 {
1974 struct ahc_initiator_tinfo *targ_info;
1975 struct ahc_tmode_tstate *tstate;
1976
1977 targ_info = ahc_fetch_transinfo(ahc,
1978 devinfo->channel,
1979 devinfo->our_scsiid,
1980 devinfo->target,
1981 &tstate);
1982 ahc_update_neg_request(ahc, devinfo, tstate,
1983 targ_info, AHC_NEG_IF_NON_ASYNC);
1984 }
1985
1986 #define AHC_MAX_STEPS 2000
1987 static void
1988 ahc_clear_critical_section(struct ahc_softc *ahc)
1989 {
1990 int stepping;
1991 int steps;
1992 u_int simode0;
1993 u_int simode1;
1994
1995 if (ahc->num_critical_sections == 0)
1996 return;
1997
1998 stepping = FALSE;
1999 steps = 0;
2000 simode0 = 0;
2001 simode1 = 0;
2002 for (;;) {
2003 struct cs *cs;
2004 u_int seqaddr;
2005 u_int i;
2006
2007 seqaddr = ahc_inb(ahc, SEQADDR0)
2008 | (ahc_inb(ahc, SEQADDR1) << 8);
2009
2010 /*
2011 * Seqaddr represents the next instruction to execute,
2012 * so we are really executing the instruction just
2013 * before it.
2014 */
2015 if (seqaddr != 0)
2016 seqaddr -= 1;
2017 cs = ahc->critical_sections;
2018 for (i = 0; i < ahc->num_critical_sections; i++, cs++) {
2019
2020 if (cs->begin < seqaddr && cs->end >= seqaddr)
2021 break;
2022 }
2023
2024 if (i == ahc->num_critical_sections)
2025 break;
2026
2027 if (steps > AHC_MAX_STEPS) {
2028 printk("%s: Infinite loop in critical section\n",
2029 ahc_name(ahc));
2030 ahc_dump_card_state(ahc);
2031 panic("critical section loop");
2032 }
2033
2034 steps++;
2035 if (stepping == FALSE) {
2036
2037 /*
2038 * Disable all interrupt sources so that the
2039 * sequencer will not be stuck by a pausing
2040 * interrupt condition while we attempt to
2041 * leave a critical section.
2042 */
2043 simode0 = ahc_inb(ahc, SIMODE0);
2044 ahc_outb(ahc, SIMODE0, 0);
2045 simode1 = ahc_inb(ahc, SIMODE1);
2046 if ((ahc->features & AHC_DT) != 0)
2047 /*
2048 * On DT class controllers, we
2049 * use the enhanced busfree logic.
2050 * Unfortunately we cannot re-enable
2051 * busfree detection within the
2052 * current connection, so we must
2053 * leave it on while single stepping.
2054 */
2055 ahc_outb(ahc, SIMODE1, simode1 & ENBUSFREE);
2056 else
2057 ahc_outb(ahc, SIMODE1, 0);
2058 ahc_outb(ahc, CLRINT, CLRSCSIINT);
2059 ahc_outb(ahc, SEQCTL, ahc->seqctl | STEP);
2060 stepping = TRUE;
2061 }
2062 if ((ahc->features & AHC_DT) != 0) {
2063 ahc_outb(ahc, CLRSINT1, CLRBUSFREE);
2064 ahc_outb(ahc, CLRINT, CLRSCSIINT);
2065 }
2066 ahc_outb(ahc, HCNTRL, ahc->unpause);
2067 while (!ahc_is_paused(ahc))
2068 ahc_delay(200);
2069 }
2070 if (stepping) {
2071 ahc_outb(ahc, SIMODE0, simode0);
2072 ahc_outb(ahc, SIMODE1, simode1);
2073 ahc_outb(ahc, SEQCTL, ahc->seqctl);
2074 }
2075 }
2076
2077 /*
2078 * Clear any pending interrupt status.
2079 */
2080 static void
2081 ahc_clear_intstat(struct ahc_softc *ahc)
2082 {
2083 /* Clear any interrupt conditions this may have caused */
2084 ahc_outb(ahc, CLRSINT1, CLRSELTIMEO|CLRATNO|CLRSCSIRSTI
2085 |CLRBUSFREE|CLRSCSIPERR|CLRPHASECHG|
2086 CLRREQINIT);
2087 ahc_flush_device_writes(ahc);
2088 ahc_outb(ahc, CLRSINT0, CLRSELDO|CLRSELDI|CLRSELINGO);
2089 ahc_flush_device_writes(ahc);
2090 ahc_outb(ahc, CLRINT, CLRSCSIINT);
2091 ahc_flush_device_writes(ahc);
2092 }
2093
2094 /**************************** Debugging Routines ******************************/
2095 #ifdef AHC_DEBUG
2096 uint32_t ahc_debug = AHC_DEBUG_OPTS;
2097 #endif
2098
2099 #if 0 /* unused */
2100 static void
2101 ahc_print_scb(struct scb *scb)
2102 {
2103 int i;
2104
2105 struct hardware_scb *hscb = scb->hscb;
2106
2107 printk("scb:%p control:0x%x scsiid:0x%x lun:%d cdb_len:%d\n",
2108 (void *)scb,
2109 hscb->control,
2110 hscb->scsiid,
2111 hscb->lun,
2112 hscb->cdb_len);
2113 printk("Shared Data: ");
2114 for (i = 0; i < sizeof(hscb->shared_data.cdb); i++)
2115 printk("%#02x", hscb->shared_data.cdb[i]);
2116 printk(" dataptr:%#x datacnt:%#x sgptr:%#x tag:%#x\n",
2117 ahc_le32toh(hscb->dataptr),
2118 ahc_le32toh(hscb->datacnt),
2119 ahc_le32toh(hscb->sgptr),
2120 hscb->tag);
2121 if (scb->sg_count > 0) {
2122 for (i = 0; i < scb->sg_count; i++) {
2123 printk("sg[%d] - Addr 0x%x%x : Length %d\n",
2124 i,
2125 (ahc_le32toh(scb->sg_list[i].len) >> 24
2126 & SG_HIGH_ADDR_BITS),
2127 ahc_le32toh(scb->sg_list[i].addr),
2128 ahc_le32toh(scb->sg_list[i].len));
2129 }
2130 }
2131 }
2132 #endif
2133
2134 /************************* Transfer Negotiation *******************************/
2135 /*
2136 * Allocate per target mode instance (ID we respond to as a target)
2137 * transfer negotiation data structures.
2138 */
2139 static struct ahc_tmode_tstate *
2140 ahc_alloc_tstate(struct ahc_softc *ahc, u_int scsi_id, char channel)
2141 {
2142 struct ahc_tmode_tstate *master_tstate;
2143 struct ahc_tmode_tstate *tstate;
2144 int i;
2145
2146 master_tstate = ahc->enabled_targets[ahc->our_id];
2147 if (channel == 'B') {
2148 scsi_id += 8;
2149 master_tstate = ahc->enabled_targets[ahc->our_id_b + 8];
2150 }
2151 if (ahc->enabled_targets[scsi_id] != NULL
2152 && ahc->enabled_targets[scsi_id] != master_tstate)
2153 panic("%s: ahc_alloc_tstate - Target already allocated",
2154 ahc_name(ahc));
2155 tstate = kmalloc(sizeof(*tstate), GFP_ATOMIC);
2156 if (tstate == NULL)
2157 return (NULL);
2158
2159 /*
2160 * If we have allocated a master tstate, copy user settings from
2161 * the master tstate (taken from SRAM or the EEPROM) for this
2162 * channel, but reset our current and goal settings to async/narrow
2163 * until an initiator talks to us.
2164 */
2165 if (master_tstate != NULL) {
2166 memcpy(tstate, master_tstate, sizeof(*tstate));
2167 memset(tstate->enabled_luns, 0, sizeof(tstate->enabled_luns));
2168 tstate->ultraenb = 0;
2169 for (i = 0; i < AHC_NUM_TARGETS; i++) {
2170 memset(&tstate->transinfo[i].curr, 0,
2171 sizeof(tstate->transinfo[i].curr));
2172 memset(&tstate->transinfo[i].goal, 0,
2173 sizeof(tstate->transinfo[i].goal));
2174 }
2175 } else
2176 memset(tstate, 0, sizeof(*tstate));
2177 ahc->enabled_targets[scsi_id] = tstate;
2178 return (tstate);
2179 }
2180
2181 #ifdef AHC_TARGET_MODE
2182 /*
2183 * Free per target mode instance (ID we respond to as a target)
2184 * transfer negotiation data structures.
2185 */
2186 static void
2187 ahc_free_tstate(struct ahc_softc *ahc, u_int scsi_id, char channel, int force)
2188 {
2189 struct ahc_tmode_tstate *tstate;
2190
2191 /*
2192 * Don't clean up our "master" tstate.
2193 * It has our default user settings.
2194 */
2195 if (((channel == 'B' && scsi_id == ahc->our_id_b)
2196 || (channel == 'A' && scsi_id == ahc->our_id))
2197 && force == FALSE)
2198 return;
2199
2200 if (channel == 'B')
2201 scsi_id += 8;
2202 tstate = ahc->enabled_targets[scsi_id];
2203 if (tstate != NULL)
2204 kfree(tstate);
2205 ahc->enabled_targets[scsi_id] = NULL;
2206 }
2207 #endif
2208
2209 /*
2210 * Called when we have an active connection to a target on the bus,
2211 * this function finds the nearest syncrate to the input period limited
2212 * by the capabilities of the bus connectivity of and sync settings for
2213 * the target.
2214 */
2215 const struct ahc_syncrate *
2216 ahc_devlimited_syncrate(struct ahc_softc *ahc,
2217 struct ahc_initiator_tinfo *tinfo,
2218 u_int *period, u_int *ppr_options, role_t role)
2219 {
2220 struct ahc_transinfo *transinfo;
2221 u_int maxsync;
2222
2223 if ((ahc->features & AHC_ULTRA2) != 0) {
2224 if ((ahc_inb(ahc, SBLKCTL) & ENAB40) != 0
2225 && (ahc_inb(ahc, SSTAT2) & EXP_ACTIVE) == 0) {
2226 maxsync = AHC_SYNCRATE_DT;
2227 } else {
2228 maxsync = AHC_SYNCRATE_ULTRA;
2229 /* Can't do DT on an SE bus */
2230 *ppr_options &= ~MSG_EXT_PPR_DT_REQ;
2231 }
2232 } else if ((ahc->features & AHC_ULTRA) != 0) {
2233 maxsync = AHC_SYNCRATE_ULTRA;
2234 } else {
2235 maxsync = AHC_SYNCRATE_FAST;
2236 }
2237 /*
2238 * Never allow a value higher than our current goal
2239 * period otherwise we may allow a target initiated
2240 * negotiation to go above the limit as set by the
2241 * user. In the case of an initiator initiated
2242 * sync negotiation, we limit based on the user
2243 * setting. This allows the system to still accept
2244 * incoming negotiations even if target initiated
2245 * negotiation is not performed.
2246 */
2247 if (role == ROLE_TARGET)
2248 transinfo = &tinfo->user;
2249 else
2250 transinfo = &tinfo->goal;
2251 *ppr_options &= transinfo->ppr_options;
2252 if (transinfo->width == MSG_EXT_WDTR_BUS_8_BIT) {
2253 maxsync = max(maxsync, (u_int)AHC_SYNCRATE_ULTRA2);
2254 *ppr_options &= ~MSG_EXT_PPR_DT_REQ;
2255 }
2256 if (transinfo->period == 0) {
2257 *period = 0;
2258 *ppr_options = 0;
2259 return (NULL);
2260 }
2261 *period = max(*period, (u_int)transinfo->period);
2262 return (ahc_find_syncrate(ahc, period, ppr_options, maxsync));
2263 }
2264
2265 /*
2266 * Look up the valid period to SCSIRATE conversion in our table.
2267 * Return the period and offset that should be sent to the target
2268 * if this was the beginning of an SDTR.
2269 */
2270 const struct ahc_syncrate *
2271 ahc_find_syncrate(struct ahc_softc *ahc, u_int *period,
2272 u_int *ppr_options, u_int maxsync)
2273 {
2274 const struct ahc_syncrate *syncrate;
2275
2276 if ((ahc->features & AHC_DT) == 0)
2277 *ppr_options &= ~MSG_EXT_PPR_DT_REQ;
2278
2279 /* Skip all DT only entries if DT is not available */
2280 if ((*ppr_options & MSG_EXT_PPR_DT_REQ) == 0
2281 && maxsync < AHC_SYNCRATE_ULTRA2)
2282 maxsync = AHC_SYNCRATE_ULTRA2;
2283
2284 /* Now set the maxsync based on the card capabilities
2285 * DT is already done above */
2286 if ((ahc->features & (AHC_DT | AHC_ULTRA2)) == 0
2287 && maxsync < AHC_SYNCRATE_ULTRA)
2288 maxsync = AHC_SYNCRATE_ULTRA;
2289 if ((ahc->features & (AHC_DT | AHC_ULTRA2 | AHC_ULTRA)) == 0
2290 && maxsync < AHC_SYNCRATE_FAST)
2291 maxsync = AHC_SYNCRATE_FAST;
2292
2293 for (syncrate = &ahc_syncrates[maxsync];
2294 syncrate->rate != NULL;
2295 syncrate++) {
2296
2297 /*
2298 * The Ultra2 table doesn't go as low
2299 * as for the Fast/Ultra cards.
2300 */
2301 if ((ahc->features & AHC_ULTRA2) != 0
2302 && (syncrate->sxfr_u2 == 0))
2303 break;
2304
2305 if (*period <= syncrate->period) {
2306 /*
2307 * When responding to a target that requests
2308 * sync, the requested rate may fall between
2309 * two rates that we can output, but still be
2310 * a rate that we can receive. Because of this,
2311 * we want to respond to the target with
2312 * the same rate that it sent to us even
2313 * if the period we use to send data to it
2314 * is lower. Only lower the response period
2315 * if we must.
2316 */
2317 if (syncrate == &ahc_syncrates[maxsync])
2318 *period = syncrate->period;
2319
2320 /*
2321 * At some speeds, we only support
2322 * ST transfers.
2323 */
2324 if ((syncrate->sxfr_u2 & ST_SXFR) != 0)
2325 *ppr_options &= ~MSG_EXT_PPR_DT_REQ;
2326 break;
2327 }
2328 }
2329
2330 if ((*period == 0)
2331 || (syncrate->rate == NULL)
2332 || ((ahc->features & AHC_ULTRA2) != 0
2333 && (syncrate->sxfr_u2 == 0))) {
2334 /* Use asynchronous transfers. */
2335 *period = 0;
2336 syncrate = NULL;
2337 *ppr_options &= ~MSG_EXT_PPR_DT_REQ;
2338 }
2339 return (syncrate);
2340 }
2341
2342 /*
2343 * Convert from an entry in our syncrate table to the SCSI equivalent
2344 * sync "period" factor.
2345 */
2346 u_int
2347 ahc_find_period(struct ahc_softc *ahc, u_int scsirate, u_int maxsync)
2348 {
2349 const struct ahc_syncrate *syncrate;
2350
2351 if ((ahc->features & AHC_ULTRA2) != 0)
2352 scsirate &= SXFR_ULTRA2;
2353 else
2354 scsirate &= SXFR;
2355
2356 /* now set maxsync based on card capabilities */
2357 if ((ahc->features & AHC_DT) == 0 && maxsync < AHC_SYNCRATE_ULTRA2)
2358 maxsync = AHC_SYNCRATE_ULTRA2;
2359 if ((ahc->features & (AHC_DT | AHC_ULTRA2)) == 0
2360 && maxsync < AHC_SYNCRATE_ULTRA)
2361 maxsync = AHC_SYNCRATE_ULTRA;
2362 if ((ahc->features & (AHC_DT | AHC_ULTRA2 | AHC_ULTRA)) == 0
2363 && maxsync < AHC_SYNCRATE_FAST)
2364 maxsync = AHC_SYNCRATE_FAST;
2365
2366
2367 syncrate = &ahc_syncrates[maxsync];
2368 while (syncrate->rate != NULL) {
2369
2370 if ((ahc->features & AHC_ULTRA2) != 0) {
2371 if (syncrate->sxfr_u2 == 0)
2372 break;
2373 else if (scsirate == (syncrate->sxfr_u2 & SXFR_ULTRA2))
2374 return (syncrate->period);
2375 } else if (scsirate == (syncrate->sxfr & SXFR)) {
2376 return (syncrate->period);
2377 }
2378 syncrate++;
2379 }
2380 return (0); /* async */
2381 }
2382
2383 /*
2384 * Truncate the given synchronous offset to a value the
2385 * current adapter type and syncrate are capable of.
2386 */
2387 static void
2388 ahc_validate_offset(struct ahc_softc *ahc,
2389 struct ahc_initiator_tinfo *tinfo,
2390 const struct ahc_syncrate *syncrate,
2391 u_int *offset, int wide, role_t role)
2392 {
2393 u_int maxoffset;
2394
2395 /* Limit offset to what we can do */
2396 if (syncrate == NULL) {
2397 maxoffset = 0;
2398 } else if ((ahc->features & AHC_ULTRA2) != 0) {
2399 maxoffset = MAX_OFFSET_ULTRA2;
2400 } else {
2401 if (wide)
2402 maxoffset = MAX_OFFSET_16BIT;
2403 else
2404 maxoffset = MAX_OFFSET_8BIT;
2405 }
2406 *offset = min(*offset, maxoffset);
2407 if (tinfo != NULL) {
2408 if (role == ROLE_TARGET)
2409 *offset = min(*offset, (u_int)tinfo->user.offset);
2410 else
2411 *offset = min(*offset, (u_int)tinfo->goal.offset);
2412 }
2413 }
2414
2415 /*
2416 * Truncate the given transfer width parameter to a value the
2417 * current adapter type is capable of.
2418 */
2419 static void
2420 ahc_validate_width(struct ahc_softc *ahc, struct ahc_initiator_tinfo *tinfo,
2421 u_int *bus_width, role_t role)
2422 {
2423 switch (*bus_width) {
2424 default:
2425 if (ahc->features & AHC_WIDE) {
2426 /* Respond Wide */
2427 *bus_width = MSG_EXT_WDTR_BUS_16_BIT;
2428 break;
2429 }
2430 /* FALLTHROUGH */
2431 case MSG_EXT_WDTR_BUS_8_BIT:
2432 *bus_width = MSG_EXT_WDTR_BUS_8_BIT;
2433 break;
2434 }
2435 if (tinfo != NULL) {
2436 if (role == ROLE_TARGET)
2437 *bus_width = min((u_int)tinfo->user.width, *bus_width);
2438 else
2439 *bus_width = min((u_int)tinfo->goal.width, *bus_width);
2440 }
2441 }
2442
2443 /*
2444 * Update the bitmask of targets for which the controller should
2445 * negotiate with at the next convenient opportunity. This currently
2446 * means the next time we send the initial identify messages for
2447 * a new transaction.
2448 */
2449 int
2450 ahc_update_neg_request(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
2451 struct ahc_tmode_tstate *tstate,
2452 struct ahc_initiator_tinfo *tinfo, ahc_neg_type neg_type)
2453 {
2454 u_int auto_negotiate_orig;
2455
2456 auto_negotiate_orig = tstate->auto_negotiate;
2457 if (neg_type == AHC_NEG_ALWAYS) {
2458 /*
2459 * Force our "current" settings to be
2460 * unknown so that unless a bus reset
2461 * occurs the need to renegotiate is
2462 * recorded persistently.
2463 */
2464 if ((ahc->features & AHC_WIDE) != 0)
2465 tinfo->curr.width = AHC_WIDTH_UNKNOWN;
2466 tinfo->curr.period = AHC_PERIOD_UNKNOWN;
2467 tinfo->curr.offset = AHC_OFFSET_UNKNOWN;
2468 }
2469 if (tinfo->curr.period != tinfo->goal.period
2470 || tinfo->curr.width != tinfo->goal.width
2471 || tinfo->curr.offset != tinfo->goal.offset
2472 || tinfo->curr.ppr_options != tinfo->goal.ppr_options
2473 || (neg_type == AHC_NEG_IF_NON_ASYNC
2474 && (tinfo->goal.offset != 0
2475 || tinfo->goal.width != MSG_EXT_WDTR_BUS_8_BIT
2476 || tinfo->goal.ppr_options != 0)))
2477 tstate->auto_negotiate |= devinfo->target_mask;
2478 else
2479 tstate->auto_negotiate &= ~devinfo->target_mask;
2480
2481 return (auto_negotiate_orig != tstate->auto_negotiate);
2482 }
2483
2484 /*
2485 * Update the user/goal/curr tables of synchronous negotiation
2486 * parameters as well as, in the case of a current or active update,
2487 * any data structures on the host controller. In the case of an
2488 * active update, the specified target is currently talking to us on
2489 * the bus, so the transfer parameter update must take effect
2490 * immediately.
2491 */
2492 void
2493 ahc_set_syncrate(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
2494 const struct ahc_syncrate *syncrate, u_int period,
2495 u_int offset, u_int ppr_options, u_int type, int paused)
2496 {
2497 struct ahc_initiator_tinfo *tinfo;
2498 struct ahc_tmode_tstate *tstate;
2499 u_int old_period;
2500 u_int old_offset;
2501 u_int old_ppr;
2502 int active;
2503 int update_needed;
2504
2505 active = (type & AHC_TRANS_ACTIVE) == AHC_TRANS_ACTIVE;
2506 update_needed = 0;
2507
2508 if (syncrate == NULL) {
2509 period = 0;
2510 offset = 0;
2511 }
2512
2513 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid,
2514 devinfo->target, &tstate);
2515
2516 if ((type & AHC_TRANS_USER) != 0) {
2517 tinfo->user.period = period;
2518 tinfo->user.offset = offset;
2519 tinfo->user.ppr_options = ppr_options;
2520 }
2521
2522 if ((type & AHC_TRANS_GOAL) != 0) {
2523 tinfo->goal.period = period;
2524 tinfo->goal.offset = offset;
2525 tinfo->goal.ppr_options = ppr_options;
2526 }
2527
2528 old_period = tinfo->curr.period;
2529 old_offset = tinfo->curr.offset;
2530 old_ppr = tinfo->curr.ppr_options;
2531
2532 if ((type & AHC_TRANS_CUR) != 0
2533 && (old_period != period
2534 || old_offset != offset
2535 || old_ppr != ppr_options)) {
2536 u_int scsirate;
2537
2538 update_needed++;
2539 scsirate = tinfo->scsirate;
2540 if ((ahc->features & AHC_ULTRA2) != 0) {
2541
2542 scsirate &= ~(SXFR_ULTRA2|SINGLE_EDGE|ENABLE_CRC);
2543 if (syncrate != NULL) {
2544 scsirate |= syncrate->sxfr_u2;
2545 if ((ppr_options & MSG_EXT_PPR_DT_REQ) != 0)
2546 scsirate |= ENABLE_CRC;
2547 else
2548 scsirate |= SINGLE_EDGE;
2549 }
2550 } else {
2551
2552 scsirate &= ~(SXFR|SOFS);
2553 /*
2554 * Ensure Ultra mode is set properly for
2555 * this target.
2556 */
2557 tstate->ultraenb &= ~devinfo->target_mask;
2558 if (syncrate != NULL) {
2559 if (syncrate->sxfr & ULTRA_SXFR) {
2560 tstate->ultraenb |=
2561 devinfo->target_mask;
2562 }
2563 scsirate |= syncrate->sxfr & SXFR;
2564 scsirate |= offset & SOFS;
2565 }
2566 if (active) {
2567 u_int sxfrctl0;
2568
2569 sxfrctl0 = ahc_inb(ahc, SXFRCTL0);
2570 sxfrctl0 &= ~FAST20;
2571 if (tstate->ultraenb & devinfo->target_mask)
2572 sxfrctl0 |= FAST20;
2573 ahc_outb(ahc, SXFRCTL0, sxfrctl0);
2574 }
2575 }
2576 if (active) {
2577 ahc_outb(ahc, SCSIRATE, scsirate);
2578 if ((ahc->features & AHC_ULTRA2) != 0)
2579 ahc_outb(ahc, SCSIOFFSET, offset);
2580 }
2581
2582 tinfo->scsirate = scsirate;
2583 tinfo->curr.period = period;
2584 tinfo->curr.offset = offset;
2585 tinfo->curr.ppr_options = ppr_options;
2586
2587 ahc_send_async(ahc, devinfo->channel, devinfo->target,
2588 CAM_LUN_WILDCARD, AC_TRANSFER_NEG);
2589 if (bootverbose) {
2590 if (offset != 0) {
2591 printk("%s: target %d synchronous at %sMHz%s, "
2592 "offset = 0x%x\n", ahc_name(ahc),
2593 devinfo->target, syncrate->rate,
2594 (ppr_options & MSG_EXT_PPR_DT_REQ)
2595 ? " DT" : "", offset);
2596 } else {
2597 printk("%s: target %d using "
2598 "asynchronous transfers\n",
2599 ahc_name(ahc), devinfo->target);
2600 }
2601 }
2602 }
2603
2604 update_needed += ahc_update_neg_request(ahc, devinfo, tstate,
2605 tinfo, AHC_NEG_TO_GOAL);
2606
2607 if (update_needed)
2608 ahc_update_pending_scbs(ahc);
2609 }
2610
2611 /*
2612 * Update the user/goal/curr tables of wide negotiation
2613 * parameters as well as, in the case of a current or active update,
2614 * any data structures on the host controller. In the case of an
2615 * active update, the specified target is currently talking to us on
2616 * the bus, so the transfer parameter update must take effect
2617 * immediately.
2618 */
2619 void
2620 ahc_set_width(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
2621 u_int width, u_int type, int paused)
2622 {
2623 struct ahc_initiator_tinfo *tinfo;
2624 struct ahc_tmode_tstate *tstate;
2625 u_int oldwidth;
2626 int active;
2627 int update_needed;
2628
2629 active = (type & AHC_TRANS_ACTIVE) == AHC_TRANS_ACTIVE;
2630 update_needed = 0;
2631 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid,
2632 devinfo->target, &tstate);
2633
2634 if ((type & AHC_TRANS_USER) != 0)
2635 tinfo->user.width = width;
2636
2637 if ((type & AHC_TRANS_GOAL) != 0)
2638 tinfo->goal.width = width;
2639
2640 oldwidth = tinfo->curr.width;
2641 if ((type & AHC_TRANS_CUR) != 0 && oldwidth != width) {
2642 u_int scsirate;
2643
2644 update_needed++;
2645 scsirate = tinfo->scsirate;
2646 scsirate &= ~WIDEXFER;
2647 if (width == MSG_EXT_WDTR_BUS_16_BIT)
2648 scsirate |= WIDEXFER;
2649
2650 tinfo->scsirate = scsirate;
2651
2652 if (active)
2653 ahc_outb(ahc, SCSIRATE, scsirate);
2654
2655 tinfo->curr.width = width;
2656
2657 ahc_send_async(ahc, devinfo->channel, devinfo->target,
2658 CAM_LUN_WILDCARD, AC_TRANSFER_NEG);
2659 if (bootverbose) {
2660 printk("%s: target %d using %dbit transfers\n",
2661 ahc_name(ahc), devinfo->target,
2662 8 * (0x01 << width));
2663 }
2664 }
2665
2666 update_needed += ahc_update_neg_request(ahc, devinfo, tstate,
2667 tinfo, AHC_NEG_TO_GOAL);
2668 if (update_needed)
2669 ahc_update_pending_scbs(ahc);
2670 }
2671
2672 /*
2673 * Update the current state of tagged queuing for a given target.
2674 */
2675 static void
2676 ahc_set_tags(struct ahc_softc *ahc, struct scsi_cmnd *cmd,
2677 struct ahc_devinfo *devinfo, ahc_queue_alg alg)
2678 {
2679 struct scsi_device *sdev = cmd->device;
2680
2681 ahc_platform_set_tags(ahc, sdev, devinfo, alg);
2682 ahc_send_async(ahc, devinfo->channel, devinfo->target,
2683 devinfo->lun, AC_TRANSFER_NEG);
2684 }
2685
2686 /*
2687 * When the transfer settings for a connection change, update any
2688 * in-transit SCBs to contain the new data so the hardware will
2689 * be set correctly during future (re)selections.
2690 */
2691 static void
2692 ahc_update_pending_scbs(struct ahc_softc *ahc)
2693 {
2694 struct scb *pending_scb;
2695 int pending_scb_count;
2696 int i;
2697 int paused;
2698 u_int saved_scbptr;
2699
2700 /*
2701 * Traverse the pending SCB list and ensure that all of the
2702 * SCBs there have the proper settings.
2703 */
2704 pending_scb_count = 0;
2705 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2706 struct ahc_devinfo devinfo;
2707 struct hardware_scb *pending_hscb;
2708 struct ahc_initiator_tinfo *tinfo;
2709 struct ahc_tmode_tstate *tstate;
2710
2711 ahc_scb_devinfo(ahc, &devinfo, pending_scb);
2712 tinfo = ahc_fetch_transinfo(ahc, devinfo.channel,
2713 devinfo.our_scsiid,
2714 devinfo.target, &tstate);
2715 pending_hscb = pending_scb->hscb;
2716 pending_hscb->control &= ~ULTRAENB;
2717 if ((tstate->ultraenb & devinfo.target_mask) != 0)
2718 pending_hscb->control |= ULTRAENB;
2719 pending_hscb->scsirate = tinfo->scsirate;
2720 pending_hscb->scsioffset = tinfo->curr.offset;
2721 if ((tstate->auto_negotiate & devinfo.target_mask) == 0
2722 && (pending_scb->flags & SCB_AUTO_NEGOTIATE) != 0) {
2723 pending_scb->flags &= ~SCB_AUTO_NEGOTIATE;
2724 pending_hscb->control &= ~MK_MESSAGE;
2725 }
2726 ahc_sync_scb(ahc, pending_scb,
2727 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
2728 pending_scb_count++;
2729 }
2730
2731 if (pending_scb_count == 0)
2732 return;
2733
2734 if (ahc_is_paused(ahc)) {
2735 paused = 1;
2736 } else {
2737 paused = 0;
2738 ahc_pause(ahc);
2739 }
2740
2741 saved_scbptr = ahc_inb(ahc, SCBPTR);
2742 /* Ensure that the hscbs down on the card match the new information */
2743 for (i = 0; i < ahc->scb_data->maxhscbs; i++) {
2744 struct hardware_scb *pending_hscb;
2745 u_int control;
2746 u_int scb_tag;
2747
2748 ahc_outb(ahc, SCBPTR, i);
2749 scb_tag = ahc_inb(ahc, SCB_TAG);
2750 pending_scb = ahc_lookup_scb(ahc, scb_tag);
2751 if (pending_scb == NULL)
2752 continue;
2753
2754 pending_hscb = pending_scb->hscb;
2755 control = ahc_inb(ahc, SCB_CONTROL);
2756 control &= ~(ULTRAENB|MK_MESSAGE);
2757 control |= pending_hscb->control & (ULTRAENB|MK_MESSAGE);
2758 ahc_outb(ahc, SCB_CONTROL, control);
2759 ahc_outb(ahc, SCB_SCSIRATE, pending_hscb->scsirate);
2760 ahc_outb(ahc, SCB_SCSIOFFSET, pending_hscb->scsioffset);
2761 }
2762 ahc_outb(ahc, SCBPTR, saved_scbptr);
2763
2764 if (paused == 0)
2765 ahc_unpause(ahc);
2766 }
2767
2768 /**************************** Pathing Information *****************************/
2769 static void
2770 ahc_fetch_devinfo(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
2771 {
2772 u_int saved_scsiid;
2773 role_t role;
2774 int our_id;
2775
2776 if (ahc_inb(ahc, SSTAT0) & TARGET)
2777 role = ROLE_TARGET;
2778 else
2779 role = ROLE_INITIATOR;
2780
2781 if (role == ROLE_TARGET
2782 && (ahc->features & AHC_MULTI_TID) != 0
2783 && (ahc_inb(ahc, SEQ_FLAGS)
2784 & (CMDPHASE_PENDING|TARG_CMD_PENDING|NO_DISCONNECT)) != 0) {
2785 /* We were selected, so pull our id from TARGIDIN */
2786 our_id = ahc_inb(ahc, TARGIDIN) & OID;
2787 } else if ((ahc->features & AHC_ULTRA2) != 0)
2788 our_id = ahc_inb(ahc, SCSIID_ULTRA2) & OID;
2789 else
2790 our_id = ahc_inb(ahc, SCSIID) & OID;
2791
2792 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
2793 ahc_compile_devinfo(devinfo,
2794 our_id,
2795 SCSIID_TARGET(ahc, saved_scsiid),
2796 ahc_inb(ahc, SAVED_LUN),
2797 SCSIID_CHANNEL(ahc, saved_scsiid),
2798 role);
2799 }
2800
2801 static const struct ahc_phase_table_entry*
2802 ahc_lookup_phase_entry(int phase)
2803 {
2804 const struct ahc_phase_table_entry *entry;
2805 const struct ahc_phase_table_entry *last_entry;
2806
2807 /*
2808 * num_phases doesn't include the default entry which
2809 * will be returned if the phase doesn't match.
2810 */
2811 last_entry = &ahc_phase_table[num_phases];
2812 for (entry = ahc_phase_table; entry < last_entry; entry++) {
2813 if (phase == entry->phase)
2814 break;
2815 }
2816 return (entry);
2817 }
2818
2819 void
2820 ahc_compile_devinfo(struct ahc_devinfo *devinfo, u_int our_id, u_int target,
2821 u_int lun, char channel, role_t role)
2822 {
2823 devinfo->our_scsiid = our_id;
2824 devinfo->target = target;
2825 devinfo->lun = lun;
2826 devinfo->target_offset = target;
2827 devinfo->channel = channel;
2828 devinfo->role = role;
2829 if (channel == 'B')
2830 devinfo->target_offset += 8;
2831 devinfo->target_mask = (0x01 << devinfo->target_offset);
2832 }
2833
2834 void
2835 ahc_print_devinfo(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
2836 {
2837 printk("%s:%c:%d:%d: ", ahc_name(ahc), devinfo->channel,
2838 devinfo->target, devinfo->lun);
2839 }
2840
2841 static void
2842 ahc_scb_devinfo(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
2843 struct scb *scb)
2844 {
2845 role_t role;
2846 int our_id;
2847
2848 our_id = SCSIID_OUR_ID(scb->hscb->scsiid);
2849 role = ROLE_INITIATOR;
2850 if ((scb->flags & SCB_TARGET_SCB) != 0)
2851 role = ROLE_TARGET;
2852 ahc_compile_devinfo(devinfo, our_id, SCB_GET_TARGET(ahc, scb),
2853 SCB_GET_LUN(scb), SCB_GET_CHANNEL(ahc, scb), role);
2854 }
2855
2856
2857 /************************ Message Phase Processing ****************************/
2858 static void
2859 ahc_assert_atn(struct ahc_softc *ahc)
2860 {
2861 u_int scsisigo;
2862
2863 scsisigo = ATNO;
2864 if ((ahc->features & AHC_DT) == 0)
2865 scsisigo |= ahc_inb(ahc, SCSISIGI);
2866 ahc_outb(ahc, SCSISIGO, scsisigo);
2867 }
2868
2869 /*
2870 * When an initiator transaction with the MK_MESSAGE flag either reconnects
2871 * or enters the initial message out phase, we are interrupted. Fill our
2872 * outgoing message buffer with the appropriate message and beging handing
2873 * the message phase(s) manually.
2874 */
2875 static void
2876 ahc_setup_initiator_msgout(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
2877 struct scb *scb)
2878 {
2879 /*
2880 * To facilitate adding multiple messages together,
2881 * each routine should increment the index and len
2882 * variables instead of setting them explicitly.
2883 */
2884 ahc->msgout_index = 0;
2885 ahc->msgout_len = 0;
2886
2887 if ((scb->flags & SCB_DEVICE_RESET) == 0
2888 && ahc_inb(ahc, MSG_OUT) == MSG_IDENTIFYFLAG) {
2889 u_int identify_msg;
2890
2891 identify_msg = MSG_IDENTIFYFLAG | SCB_GET_LUN(scb);
2892 if ((scb->hscb->control & DISCENB) != 0)
2893 identify_msg |= MSG_IDENTIFY_DISCFLAG;
2894 ahc->msgout_buf[ahc->msgout_index++] = identify_msg;
2895 ahc->msgout_len++;
2896
2897 if ((scb->hscb->control & TAG_ENB) != 0) {
2898 ahc->msgout_buf[ahc->msgout_index++] =
2899 scb->hscb->control & (TAG_ENB|SCB_TAG_TYPE);
2900 ahc->msgout_buf[ahc->msgout_index++] = scb->hscb->tag;
2901 ahc->msgout_len += 2;
2902 }
2903 }
2904
2905 if (scb->flags & SCB_DEVICE_RESET) {
2906 ahc->msgout_buf[ahc->msgout_index++] = MSG_BUS_DEV_RESET;
2907 ahc->msgout_len++;
2908 ahc_print_path(ahc, scb);
2909 printk("Bus Device Reset Message Sent\n");
2910 /*
2911 * Clear our selection hardware in advance of
2912 * the busfree. We may have an entry in the waiting
2913 * Q for this target, and we don't want to go about
2914 * selecting while we handle the busfree and blow it
2915 * away.
2916 */
2917 ahc_outb(ahc, SCSISEQ, (ahc_inb(ahc, SCSISEQ) & ~ENSELO));
2918 } else if ((scb->flags & SCB_ABORT) != 0) {
2919 if ((scb->hscb->control & TAG_ENB) != 0)
2920 ahc->msgout_buf[ahc->msgout_index++] = MSG_ABORT_TAG;
2921 else
2922 ahc->msgout_buf[ahc->msgout_index++] = MSG_ABORT;
2923 ahc->msgout_len++;
2924 ahc_print_path(ahc, scb);
2925 printk("Abort%s Message Sent\n",
2926 (scb->hscb->control & TAG_ENB) != 0 ? " Tag" : "");
2927 /*
2928 * Clear our selection hardware in advance of
2929 * the busfree. We may have an entry in the waiting
2930 * Q for this target, and we don't want to go about
2931 * selecting while we handle the busfree and blow it
2932 * away.
2933 */
2934 ahc_outb(ahc, SCSISEQ, (ahc_inb(ahc, SCSISEQ) & ~ENSELO));
2935 } else if ((scb->flags & (SCB_AUTO_NEGOTIATE|SCB_NEGOTIATE)) != 0) {
2936 ahc_build_transfer_msg(ahc, devinfo);
2937 } else {
2938 printk("ahc_intr: AWAITING_MSG for an SCB that "
2939 "does not have a waiting message\n");
2940 printk("SCSIID = %x, target_mask = %x\n", scb->hscb->scsiid,
2941 devinfo->target_mask);
2942 panic("SCB = %d, SCB Control = %x, MSG_OUT = %x "
2943 "SCB flags = %x", scb->hscb->tag, scb->hscb->control,
2944 ahc_inb(ahc, MSG_OUT), scb->flags);
2945 }
2946
2947 /*
2948 * Clear the MK_MESSAGE flag from the SCB so we aren't
2949 * asked to send this message again.
2950 */
2951 ahc_outb(ahc, SCB_CONTROL, ahc_inb(ahc, SCB_CONTROL) & ~MK_MESSAGE);
2952 scb->hscb->control &= ~MK_MESSAGE;
2953 ahc->msgout_index = 0;
2954 ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT;
2955 }
2956
2957 /*
2958 * Build an appropriate transfer negotiation message for the
2959 * currently active target.
2960 */
2961 static void
2962 ahc_build_transfer_msg(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
2963 {
2964 /*
2965 * We need to initiate transfer negotiations.
2966 * If our current and goal settings are identical,
2967 * we want to renegotiate due to a check condition.
2968 */
2969 struct ahc_initiator_tinfo *tinfo;
2970 struct ahc_tmode_tstate *tstate;
2971 const struct ahc_syncrate *rate;
2972 int dowide;
2973 int dosync;
2974 int doppr;
2975 u_int period;
2976 u_int ppr_options;
2977 u_int offset;
2978
2979 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid,
2980 devinfo->target, &tstate);
2981 /*
2982 * Filter our period based on the current connection.
2983 * If we can't perform DT transfers on this segment (not in LVD
2984 * mode for instance), then our decision to issue a PPR message
2985 * may change.
2986 */
2987 period = tinfo->goal.period;
2988 offset = tinfo->goal.offset;
2989 ppr_options = tinfo->goal.ppr_options;
2990 /* Target initiated PPR is not allowed in the SCSI spec */
2991 if (devinfo->role == ROLE_TARGET)
2992 ppr_options = 0;
2993 rate = ahc_devlimited_syncrate(ahc, tinfo, &period,
2994 &ppr_options, devinfo->role);
2995 dowide = tinfo->curr.width != tinfo->goal.width;
2996 dosync = tinfo->curr.offset != offset || tinfo->curr.period != period;
2997 /*
2998 * Only use PPR if we have options that need it, even if the device
2999 * claims to support it. There might be an expander in the way
3000 * that doesn't.
3001 */
3002 doppr = ppr_options != 0;
3003
3004 if (!dowide && !dosync && !doppr) {
3005 dowide = tinfo->goal.width != MSG_EXT_WDTR_BUS_8_BIT;
3006 dosync = tinfo->goal.offset != 0;
3007 }
3008
3009 if (!dowide && !dosync && !doppr) {
3010 /*
3011 * Force async with a WDTR message if we have a wide bus,
3012 * or just issue an SDTR with a 0 offset.
3013 */
3014 if ((ahc->features & AHC_WIDE) != 0)
3015 dowide = 1;
3016 else
3017 dosync = 1;
3018
3019 if (bootverbose) {
3020 ahc_print_devinfo(ahc, devinfo);
3021 printk("Ensuring async\n");
3022 }
3023 }
3024
3025 /* Target initiated PPR is not allowed in the SCSI spec */
3026 if (devinfo->role == ROLE_TARGET)
3027 doppr = 0;
3028
3029 /*
3030 * Both the PPR message and SDTR message require the
3031 * goal syncrate to be limited to what the target device
3032 * is capable of handling (based on whether an LVD->SE
3033 * expander is on the bus), so combine these two cases.
3034 * Regardless, guarantee that if we are using WDTR and SDTR
3035 * messages that WDTR comes first.
3036 */
3037 if (doppr || (dosync && !dowide)) {
3038
3039 offset = tinfo->goal.offset;
3040 ahc_validate_offset(ahc, tinfo, rate, &offset,
3041 doppr ? tinfo->goal.width
3042 : tinfo->curr.width,
3043 devinfo->role);
3044 if (doppr) {
3045 ahc_construct_ppr(ahc, devinfo, period, offset,
3046 tinfo->goal.width, ppr_options);
3047 } else {
3048 ahc_construct_sdtr(ahc, devinfo, period, offset);
3049 }
3050 } else {
3051 ahc_construct_wdtr(ahc, devinfo, tinfo->goal.width);
3052 }
3053 }
3054
3055 /*
3056 * Build a synchronous negotiation message in our message
3057 * buffer based on the input parameters.
3058 */
3059 static void
3060 ahc_construct_sdtr(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
3061 u_int period, u_int offset)
3062 {
3063 if (offset == 0)
3064 period = AHC_ASYNC_XFER_PERIOD;
3065 ahc->msgout_index += spi_populate_sync_msg(
3066 ahc->msgout_buf + ahc->msgout_index, period, offset);
3067 ahc->msgout_len += 5;
3068 if (bootverbose) {
3069 printk("(%s:%c:%d:%d): Sending SDTR period %x, offset %x\n",
3070 ahc_name(ahc), devinfo->channel, devinfo->target,
3071 devinfo->lun, period, offset);
3072 }
3073 }
3074
3075 /*
3076 * Build a wide negotiation message in our message
3077 * buffer based on the input parameters.
3078 */
3079 static void
3080 ahc_construct_wdtr(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
3081 u_int bus_width)
3082 {
3083 ahc->msgout_index += spi_populate_width_msg(
3084 ahc->msgout_buf + ahc->msgout_index, bus_width);
3085 ahc->msgout_len += 4;
3086 if (bootverbose) {
3087 printk("(%s:%c:%d:%d): Sending WDTR %x\n",
3088 ahc_name(ahc), devinfo->channel, devinfo->target,
3089 devinfo->lun, bus_width);
3090 }
3091 }
3092
3093 /*
3094 * Build a parallel protocol request message in our message
3095 * buffer based on the input parameters.
3096 */
3097 static void
3098 ahc_construct_ppr(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
3099 u_int period, u_int offset, u_int bus_width,
3100 u_int ppr_options)
3101 {
3102 if (offset == 0)
3103 period = AHC_ASYNC_XFER_PERIOD;
3104 ahc->msgout_index += spi_populate_ppr_msg(
3105 ahc->msgout_buf + ahc->msgout_index, period, offset,
3106 bus_width, ppr_options);
3107 ahc->msgout_len += 8;
3108 if (bootverbose) {
3109 printk("(%s:%c:%d:%d): Sending PPR bus_width %x, period %x, "
3110 "offset %x, ppr_options %x\n", ahc_name(ahc),
3111 devinfo->channel, devinfo->target, devinfo->lun,
3112 bus_width, period, offset, ppr_options);
3113 }
3114 }
3115
3116 /*
3117 * Clear any active message state.
3118 */
3119 static void
3120 ahc_clear_msg_state(struct ahc_softc *ahc)
3121 {
3122 ahc->msgout_len = 0;
3123 ahc->msgin_index = 0;
3124 ahc->msg_type = MSG_TYPE_NONE;
3125 if ((ahc_inb(ahc, SCSISIGI) & ATNI) != 0) {
3126 /*
3127 * The target didn't care to respond to our
3128 * message request, so clear ATN.
3129 */
3130 ahc_outb(ahc, CLRSINT1, CLRATNO);
3131 }
3132 ahc_outb(ahc, MSG_OUT, MSG_NOOP);
3133 ahc_outb(ahc, SEQ_FLAGS2,
3134 ahc_inb(ahc, SEQ_FLAGS2) & ~TARGET_MSG_PENDING);
3135 }
3136
3137 static void
3138 ahc_handle_proto_violation(struct ahc_softc *ahc)
3139 {
3140 struct ahc_devinfo devinfo;
3141 struct scb *scb;
3142 u_int scbid;
3143 u_int seq_flags;
3144 u_int curphase;
3145 u_int lastphase;
3146 int found;
3147
3148 ahc_fetch_devinfo(ahc, &devinfo);
3149 scbid = ahc_inb(ahc, SCB_TAG);
3150 scb = ahc_lookup_scb(ahc, scbid);
3151 seq_flags = ahc_inb(ahc, SEQ_FLAGS);
3152 curphase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK;
3153 lastphase = ahc_inb(ahc, LASTPHASE);
3154 if ((seq_flags & NOT_IDENTIFIED) != 0) {
3155
3156 /*
3157 * The reconnecting target either did not send an
3158 * identify message, or did, but we didn't find an SCB
3159 * to match.
3160 */
3161 ahc_print_devinfo(ahc, &devinfo);
3162 printk("Target did not send an IDENTIFY message. "
3163 "LASTPHASE = 0x%x.\n", lastphase);
3164 scb = NULL;
3165 } else if (scb == NULL) {
3166 /*
3167 * We don't seem to have an SCB active for this
3168 * transaction. Print an error and reset the bus.
3169 */
3170 ahc_print_devinfo(ahc, &devinfo);
3171 printk("No SCB found during protocol violation\n");
3172 goto proto_violation_reset;
3173 } else {
3174 ahc_set_transaction_status(scb, CAM_SEQUENCE_FAIL);
3175 if ((seq_flags & NO_CDB_SENT) != 0) {
3176 ahc_print_path(ahc, scb);
3177 printk("No or incomplete CDB sent to device.\n");
3178 } else if ((ahc_inb(ahc, SCB_CONTROL) & STATUS_RCVD) == 0) {
3179 /*
3180 * The target never bothered to provide status to
3181 * us prior to completing the command. Since we don't
3182 * know the disposition of this command, we must attempt
3183 * to abort it. Assert ATN and prepare to send an abort
3184 * message.
3185 */
3186 ahc_print_path(ahc, scb);
3187 printk("Completed command without status.\n");
3188 } else {
3189 ahc_print_path(ahc, scb);
3190 printk("Unknown protocol violation.\n");
3191 ahc_dump_card_state(ahc);
3192 }
3193 }
3194 if ((lastphase & ~P_DATAIN_DT) == 0
3195 || lastphase == P_COMMAND) {
3196 proto_violation_reset:
3197 /*
3198 * Target either went directly to data/command
3199 * phase or didn't respond to our ATN.
3200 * The only safe thing to do is to blow
3201 * it away with a bus reset.
3202 */
3203 found = ahc_reset_channel(ahc, 'A', TRUE);
3204 printk("%s: Issued Channel %c Bus Reset. "
3205 "%d SCBs aborted\n", ahc_name(ahc), 'A', found);
3206 } else {
3207 /*
3208 * Leave the selection hardware off in case
3209 * this abort attempt will affect yet to
3210 * be sent commands.
3211 */
3212 ahc_outb(ahc, SCSISEQ,
3213 ahc_inb(ahc, SCSISEQ) & ~ENSELO);
3214 ahc_assert_atn(ahc);
3215 ahc_outb(ahc, MSG_OUT, HOST_MSG);
3216 if (scb == NULL) {
3217 ahc_print_devinfo(ahc, &devinfo);
3218 ahc->msgout_buf[0] = MSG_ABORT_TASK;
3219 ahc->msgout_len = 1;
3220 ahc->msgout_index = 0;
3221 ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT;
3222 } else {
3223 ahc_print_path(ahc, scb);
3224 scb->flags |= SCB_ABORT;
3225 }
3226 printk("Protocol violation %s. Attempting to abort.\n",
3227 ahc_lookup_phase_entry(curphase)->phasemsg);
3228 }
3229 }
3230
3231 /*
3232 * Manual message loop handler.
3233 */
3234 static void
3235 ahc_handle_message_phase(struct ahc_softc *ahc)
3236 {
3237 struct ahc_devinfo devinfo;
3238 u_int bus_phase;
3239 int end_session;
3240
3241 ahc_fetch_devinfo(ahc, &devinfo);
3242 end_session = FALSE;
3243 bus_phase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK;
3244
3245 reswitch:
3246 switch (ahc->msg_type) {
3247 case MSG_TYPE_INITIATOR_MSGOUT:
3248 {
3249 int lastbyte;
3250 int phasemis;
3251 int msgdone;
3252
3253 if (ahc->msgout_len == 0)
3254 panic("HOST_MSG_LOOP interrupt with no active message");
3255
3256 #ifdef AHC_DEBUG
3257 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) {
3258 ahc_print_devinfo(ahc, &devinfo);
3259 printk("INITIATOR_MSG_OUT");
3260 }
3261 #endif
3262 phasemis = bus_phase != P_MESGOUT;
3263 if (phasemis) {
3264 #ifdef AHC_DEBUG
3265 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) {
3266 printk(" PHASEMIS %s\n",
3267 ahc_lookup_phase_entry(bus_phase)
3268 ->phasemsg);
3269 }
3270 #endif
3271 if (bus_phase == P_MESGIN) {
3272 /*
3273 * Change gears and see if
3274 * this messages is of interest to
3275 * us or should be passed back to
3276 * the sequencer.
3277 */
3278 ahc_outb(ahc, CLRSINT1, CLRATNO);
3279 ahc->send_msg_perror = FALSE;
3280 ahc->msg_type = MSG_TYPE_INITIATOR_MSGIN;
3281 ahc->msgin_index = 0;
3282 goto reswitch;
3283 }
3284 end_session = TRUE;
3285 break;
3286 }
3287
3288 if (ahc->send_msg_perror) {
3289 ahc_outb(ahc, CLRSINT1, CLRATNO);
3290 ahc_outb(ahc, CLRSINT1, CLRREQINIT);
3291 #ifdef AHC_DEBUG
3292 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0)
3293 printk(" byte 0x%x\n", ahc->send_msg_perror);
3294 #endif
3295 ahc_outb(ahc, SCSIDATL, MSG_PARITY_ERROR);
3296 break;
3297 }
3298
3299 msgdone = ahc->msgout_index == ahc->msgout_len;
3300 if (msgdone) {
3301 /*
3302 * The target has requested a retry.
3303 * Re-assert ATN, reset our message index to
3304 * 0, and try again.
3305 */
3306 ahc->msgout_index = 0;
3307 ahc_assert_atn(ahc);
3308 }
3309
3310 lastbyte = ahc->msgout_index == (ahc->msgout_len - 1);
3311 if (lastbyte) {
3312 /* Last byte is signified by dropping ATN */
3313 ahc_outb(ahc, CLRSINT1, CLRATNO);
3314 }
3315
3316 /*
3317 * Clear our interrupt status and present
3318 * the next byte on the bus.
3319 */
3320 ahc_outb(ahc, CLRSINT1, CLRREQINIT);
3321 #ifdef AHC_DEBUG
3322 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0)
3323 printk(" byte 0x%x\n",
3324 ahc->msgout_buf[ahc->msgout_index]);
3325 #endif
3326 ahc_outb(ahc, SCSIDATL, ahc->msgout_buf[ahc->msgout_index++]);
3327 break;
3328 }
3329 case MSG_TYPE_INITIATOR_MSGIN:
3330 {
3331 int phasemis;
3332 int message_done;
3333
3334 #ifdef AHC_DEBUG
3335 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) {
3336 ahc_print_devinfo(ahc, &devinfo);
3337 printk("INITIATOR_MSG_IN");
3338 }
3339 #endif
3340 phasemis = bus_phase != P_MESGIN;
3341 if (phasemis) {
3342 #ifdef AHC_DEBUG
3343 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) {
3344 printk(" PHASEMIS %s\n",
3345 ahc_lookup_phase_entry(bus_phase)
3346 ->phasemsg);
3347 }
3348 #endif
3349 ahc->msgin_index = 0;
3350 if (bus_phase == P_MESGOUT
3351 && (ahc->send_msg_perror == TRUE
3352 || (ahc->msgout_len != 0
3353 && ahc->msgout_index == 0))) {
3354 ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT;
3355 goto reswitch;
3356 }
3357 end_session = TRUE;
3358 break;
3359 }
3360
3361 /* Pull the byte in without acking it */
3362 ahc->msgin_buf[ahc->msgin_index] = ahc_inb(ahc, SCSIBUSL);
3363 #ifdef AHC_DEBUG
3364 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0)
3365 printk(" byte 0x%x\n",
3366 ahc->msgin_buf[ahc->msgin_index]);
3367 #endif
3368
3369 message_done = ahc_parse_msg(ahc, &devinfo);
3370
3371 if (message_done) {
3372 /*
3373 * Clear our incoming message buffer in case there
3374 * is another message following this one.
3375 */
3376 ahc->msgin_index = 0;
3377
3378 /*
3379 * If this message illicited a response,
3380 * assert ATN so the target takes us to the
3381 * message out phase.
3382 */
3383 if (ahc->msgout_len != 0) {
3384 #ifdef AHC_DEBUG
3385 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) {
3386 ahc_print_devinfo(ahc, &devinfo);
3387 printk("Asserting ATN for response\n");
3388 }
3389 #endif
3390 ahc_assert_atn(ahc);
3391 }
3392 } else
3393 ahc->msgin_index++;
3394
3395 if (message_done == MSGLOOP_TERMINATED) {
3396 end_session = TRUE;
3397 } else {
3398 /* Ack the byte */
3399 ahc_outb(ahc, CLRSINT1, CLRREQINIT);
3400 ahc_inb(ahc, SCSIDATL);
3401 }
3402 break;
3403 }
3404 case MSG_TYPE_TARGET_MSGIN:
3405 {
3406 int msgdone;
3407 int msgout_request;
3408
3409 if (ahc->msgout_len == 0)
3410 panic("Target MSGIN with no active message");
3411
3412 /*
3413 * If we interrupted a mesgout session, the initiator
3414 * will not know this until our first REQ. So, we
3415 * only honor mesgout requests after we've sent our
3416 * first byte.
3417 */
3418 if ((ahc_inb(ahc, SCSISIGI) & ATNI) != 0
3419 && ahc->msgout_index > 0)
3420 msgout_request = TRUE;
3421 else
3422 msgout_request = FALSE;
3423
3424 if (msgout_request) {
3425
3426 /*
3427 * Change gears and see if
3428 * this messages is of interest to
3429 * us or should be passed back to
3430 * the sequencer.
3431 */
3432 ahc->msg_type = MSG_TYPE_TARGET_MSGOUT;
3433 ahc_outb(ahc, SCSISIGO, P_MESGOUT | BSYO);
3434 ahc->msgin_index = 0;
3435 /* Dummy read to REQ for first byte */
3436 ahc_inb(ahc, SCSIDATL);
3437 ahc_outb(ahc, SXFRCTL0,
3438 ahc_inb(ahc, SXFRCTL0) | SPIOEN);
3439 break;
3440 }
3441
3442 msgdone = ahc->msgout_index == ahc->msgout_len;
3443 if (msgdone) {
3444 ahc_outb(ahc, SXFRCTL0,
3445 ahc_inb(ahc, SXFRCTL0) & ~SPIOEN);
3446 end_session = TRUE;
3447 break;
3448 }
3449
3450 /*
3451 * Present the next byte on the bus.
3452 */
3453 ahc_outb(ahc, SXFRCTL0, ahc_inb(ahc, SXFRCTL0) | SPIOEN);
3454 ahc_outb(ahc, SCSIDATL, ahc->msgout_buf[ahc->msgout_index++]);
3455 break;
3456 }
3457 case MSG_TYPE_TARGET_MSGOUT:
3458 {
3459 int lastbyte;
3460 int msgdone;
3461
3462 /*
3463 * The initiator signals that this is
3464 * the last byte by dropping ATN.
3465 */
3466 lastbyte = (ahc_inb(ahc, SCSISIGI) & ATNI) == 0;
3467
3468 /*
3469 * Read the latched byte, but turn off SPIOEN first
3470 * so that we don't inadvertently cause a REQ for the
3471 * next byte.
3472 */
3473 ahc_outb(ahc, SXFRCTL0, ahc_inb(ahc, SXFRCTL0) & ~SPIOEN);
3474 ahc->msgin_buf[ahc->msgin_index] = ahc_inb(ahc, SCSIDATL);
3475 msgdone = ahc_parse_msg(ahc, &devinfo);
3476 if (msgdone == MSGLOOP_TERMINATED) {
3477 /*
3478 * The message is *really* done in that it caused
3479 * us to go to bus free. The sequencer has already
3480 * been reset at this point, so pull the ejection
3481 * handle.
3482 */
3483 return;
3484 }
3485
3486 ahc->msgin_index++;
3487
3488 /*
3489 * XXX Read spec about initiator dropping ATN too soon
3490 * and use msgdone to detect it.
3491 */
3492 if (msgdone == MSGLOOP_MSGCOMPLETE) {
3493 ahc->msgin_index = 0;
3494
3495 /*
3496 * If this message illicited a response, transition
3497 * to the Message in phase and send it.
3498 */
3499 if (ahc->msgout_len != 0) {
3500 ahc_outb(ahc, SCSISIGO, P_MESGIN | BSYO);
3501 ahc_outb(ahc, SXFRCTL0,
3502 ahc_inb(ahc, SXFRCTL0) | SPIOEN);
3503 ahc->msg_type = MSG_TYPE_TARGET_MSGIN;
3504 ahc->msgin_index = 0;
3505 break;
3506 }
3507 }
3508
3509 if (lastbyte)
3510 end_session = TRUE;
3511 else {
3512 /* Ask for the next byte. */
3513 ahc_outb(ahc, SXFRCTL0,
3514 ahc_inb(ahc, SXFRCTL0) | SPIOEN);
3515 }
3516
3517 break;
3518 }
3519 default:
3520 panic("Unknown REQINIT message type");
3521 }
3522
3523 if (end_session) {
3524 ahc_clear_msg_state(ahc);
3525 ahc_outb(ahc, RETURN_1, EXIT_MSG_LOOP);
3526 } else
3527 ahc_outb(ahc, RETURN_1, CONT_MSG_LOOP);
3528 }
3529
3530 /*
3531 * See if we sent a particular extended message to the target.
3532 * If "full" is true, return true only if the target saw the full
3533 * message. If "full" is false, return true if the target saw at
3534 * least the first byte of the message.
3535 */
3536 static int
3537 ahc_sent_msg(struct ahc_softc *ahc, ahc_msgtype type, u_int msgval, int full)
3538 {
3539 int found;
3540 u_int index;
3541
3542 found = FALSE;
3543 index = 0;
3544
3545 while (index < ahc->msgout_len) {
3546 if (ahc->msgout_buf[index] == MSG_EXTENDED) {
3547 u_int end_index;
3548
3549 end_index = index + 1 + ahc->msgout_buf[index + 1];
3550 if (ahc->msgout_buf[index+2] == msgval
3551 && type == AHCMSG_EXT) {
3552
3553 if (full) {
3554 if (ahc->msgout_index > end_index)
3555 found = TRUE;
3556 } else if (ahc->msgout_index > index)
3557 found = TRUE;
3558 }
3559 index = end_index;
3560 } else if (ahc->msgout_buf[index] >= MSG_SIMPLE_TASK
3561 && ahc->msgout_buf[index] <= MSG_IGN_WIDE_RESIDUE) {
3562
3563 /* Skip tag type and tag id or residue param*/
3564 index += 2;
3565 } else {
3566 /* Single byte message */
3567 if (type == AHCMSG_1B
3568 && ahc->msgout_buf[index] == msgval
3569 && ahc->msgout_index > index)
3570 found = TRUE;
3571 index++;
3572 }
3573
3574 if (found)
3575 break;
3576 }
3577 return (found);
3578 }
3579
3580 /*
3581 * Wait for a complete incoming message, parse it, and respond accordingly.
3582 */
3583 static int
3584 ahc_parse_msg(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
3585 {
3586 struct ahc_initiator_tinfo *tinfo;
3587 struct ahc_tmode_tstate *tstate;
3588 int reject;
3589 int done;
3590 int response;
3591 u_int targ_scsirate;
3592
3593 done = MSGLOOP_IN_PROG;
3594 response = FALSE;
3595 reject = FALSE;
3596 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid,
3597 devinfo->target, &tstate);
3598 targ_scsirate = tinfo->scsirate;
3599
3600 /*
3601 * Parse as much of the message as is available,
3602 * rejecting it if we don't support it. When
3603 * the entire message is available and has been
3604 * handled, return MSGLOOP_MSGCOMPLETE, indicating
3605 * that we have parsed an entire message.
3606 *
3607 * In the case of extended messages, we accept the length
3608 * byte outright and perform more checking once we know the
3609 * extended message type.
3610 */
3611 switch (ahc->msgin_buf[0]) {
3612 case MSG_DISCONNECT:
3613 case MSG_SAVEDATAPOINTER:
3614 case MSG_CMDCOMPLETE:
3615 case MSG_RESTOREPOINTERS:
3616 case MSG_IGN_WIDE_RESIDUE:
3617 /*
3618 * End our message loop as these are messages
3619 * the sequencer handles on its own.
3620 */
3621 done = MSGLOOP_TERMINATED;
3622 break;
3623 case MSG_MESSAGE_REJECT:
3624 response = ahc_handle_msg_reject(ahc, devinfo);
3625 /* FALLTHROUGH */
3626 case MSG_NOOP:
3627 done = MSGLOOP_MSGCOMPLETE;
3628 break;
3629 case MSG_EXTENDED:
3630 {
3631 /* Wait for enough of the message to begin validation */
3632 if (ahc->msgin_index < 2)
3633 break;
3634 switch (ahc->msgin_buf[2]) {
3635 case MSG_EXT_SDTR:
3636 {
3637 const struct ahc_syncrate *syncrate;
3638 u_int period;
3639 u_int ppr_options;
3640 u_int offset;
3641 u_int saved_offset;
3642
3643 if (ahc->msgin_buf[1] != MSG_EXT_SDTR_LEN) {
3644 reject = TRUE;
3645 break;
3646 }
3647
3648 /*
3649 * Wait until we have both args before validating
3650 * and acting on this message.
3651 *
3652 * Add one to MSG_EXT_SDTR_LEN to account for
3653 * the extended message preamble.
3654 */
3655 if (ahc->msgin_index < (MSG_EXT_SDTR_LEN + 1))
3656 break;
3657
3658 period = ahc->msgin_buf[3];
3659 ppr_options = 0;
3660 saved_offset = offset = ahc->msgin_buf[4];
3661 syncrate = ahc_devlimited_syncrate(ahc, tinfo, &period,
3662 &ppr_options,
3663 devinfo->role);
3664 ahc_validate_offset(ahc, tinfo, syncrate, &offset,
3665 targ_scsirate & WIDEXFER,
3666 devinfo->role);
3667 if (bootverbose) {
3668 printk("(%s:%c:%d:%d): Received "
3669 "SDTR period %x, offset %x\n\t"
3670 "Filtered to period %x, offset %x\n",
3671 ahc_name(ahc), devinfo->channel,
3672 devinfo->target, devinfo->lun,
3673 ahc->msgin_buf[3], saved_offset,
3674 period, offset);
3675 }
3676 ahc_set_syncrate(ahc, devinfo,
3677 syncrate, period,
3678 offset, ppr_options,
3679 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL,
3680 /*paused*/TRUE);
3681
3682 /*
3683 * See if we initiated Sync Negotiation
3684 * and didn't have to fall down to async
3685 * transfers.
3686 */
3687 if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_SDTR, TRUE)) {
3688 /* We started it */
3689 if (saved_offset != offset) {
3690 /* Went too low - force async */
3691 reject = TRUE;
3692 }
3693 } else {
3694 /*
3695 * Send our own SDTR in reply
3696 */
3697 if (bootverbose
3698 && devinfo->role == ROLE_INITIATOR) {
3699 printk("(%s:%c:%d:%d): Target "
3700 "Initiated SDTR\n",
3701 ahc_name(ahc), devinfo->channel,
3702 devinfo->target, devinfo->lun);
3703 }
3704 ahc->msgout_index = 0;
3705 ahc->msgout_len = 0;
3706 ahc_construct_sdtr(ahc, devinfo,
3707 period, offset);
3708 ahc->msgout_index = 0;
3709 response = TRUE;
3710 }
3711 done = MSGLOOP_MSGCOMPLETE;
3712 break;
3713 }
3714 case MSG_EXT_WDTR:
3715 {
3716 u_int bus_width;
3717 u_int saved_width;
3718 u_int sending_reply;
3719
3720 sending_reply = FALSE;
3721 if (ahc->msgin_buf[1] != MSG_EXT_WDTR_LEN) {
3722 reject = TRUE;
3723 break;
3724 }
3725
3726 /*
3727 * Wait until we have our arg before validating
3728 * and acting on this message.
3729 *
3730 * Add one to MSG_EXT_WDTR_LEN to account for
3731 * the extended message preamble.
3732 */
3733 if (ahc->msgin_index < (MSG_EXT_WDTR_LEN + 1))
3734 break;
3735
3736 bus_width = ahc->msgin_buf[3];
3737 saved_width = bus_width;
3738 ahc_validate_width(ahc, tinfo, &bus_width,
3739 devinfo->role);
3740 if (bootverbose) {
3741 printk("(%s:%c:%d:%d): Received WDTR "
3742 "%x filtered to %x\n",
3743 ahc_name(ahc), devinfo->channel,
3744 devinfo->target, devinfo->lun,
3745 saved_width, bus_width);
3746 }
3747
3748 if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_WDTR, TRUE)) {
3749 /*
3750 * Don't send a WDTR back to the
3751 * target, since we asked first.
3752 * If the width went higher than our
3753 * request, reject it.
3754 */
3755 if (saved_width > bus_width) {
3756 reject = TRUE;
3757 printk("(%s:%c:%d:%d): requested %dBit "
3758 "transfers. Rejecting...\n",
3759 ahc_name(ahc), devinfo->channel,
3760 devinfo->target, devinfo->lun,
3761 8 * (0x01 << bus_width));
3762 bus_width = 0;
3763 }
3764 } else {
3765 /*
3766 * Send our own WDTR in reply
3767 */
3768 if (bootverbose
3769 && devinfo->role == ROLE_INITIATOR) {
3770 printk("(%s:%c:%d:%d): Target "
3771 "Initiated WDTR\n",
3772 ahc_name(ahc), devinfo->channel,
3773 devinfo->target, devinfo->lun);
3774 }
3775 ahc->msgout_index = 0;
3776 ahc->msgout_len = 0;
3777 ahc_construct_wdtr(ahc, devinfo, bus_width);
3778 ahc->msgout_index = 0;
3779 response = TRUE;
3780 sending_reply = TRUE;
3781 }
3782 /*
3783 * After a wide message, we are async, but
3784 * some devices don't seem to honor this portion
3785 * of the spec. Force a renegotiation of the
3786 * sync component of our transfer agreement even
3787 * if our goal is async. By updating our width
3788 * after forcing the negotiation, we avoid
3789 * renegotiating for width.
3790 */
3791 ahc_update_neg_request(ahc, devinfo, tstate,
3792 tinfo, AHC_NEG_ALWAYS);
3793 ahc_set_width(ahc, devinfo, bus_width,
3794 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL,
3795 /*paused*/TRUE);
3796 if (sending_reply == FALSE && reject == FALSE) {
3797
3798 /*
3799 * We will always have an SDTR to send.
3800 */
3801 ahc->msgout_index = 0;
3802 ahc->msgout_len = 0;
3803 ahc_build_transfer_msg(ahc, devinfo);
3804 ahc->msgout_index = 0;
3805 response = TRUE;
3806 }
3807 done = MSGLOOP_MSGCOMPLETE;
3808 break;
3809 }
3810 case MSG_EXT_PPR:
3811 {
3812 const struct ahc_syncrate *syncrate;
3813 u_int period;
3814 u_int offset;
3815 u_int bus_width;
3816 u_int ppr_options;
3817 u_int saved_width;
3818 u_int saved_offset;
3819 u_int saved_ppr_options;
3820
3821 if (ahc->msgin_buf[1] != MSG_EXT_PPR_LEN) {
3822 reject = TRUE;
3823 break;
3824 }
3825
3826 /*
3827 * Wait until we have all args before validating
3828 * and acting on this message.
3829 *
3830 * Add one to MSG_EXT_PPR_LEN to account for
3831 * the extended message preamble.
3832 */
3833 if (ahc->msgin_index < (MSG_EXT_PPR_LEN + 1))
3834 break;
3835
3836 period = ahc->msgin_buf[3];
3837 offset = ahc->msgin_buf[5];
3838 bus_width = ahc->msgin_buf[6];
3839 saved_width = bus_width;
3840 ppr_options = ahc->msgin_buf[7];
3841 /*
3842 * According to the spec, a DT only
3843 * period factor with no DT option
3844 * set implies async.
3845 */
3846 if ((ppr_options & MSG_EXT_PPR_DT_REQ) == 0
3847 && period == 9)
3848 offset = 0;
3849 saved_ppr_options = ppr_options;
3850 saved_offset = offset;
3851
3852 /*
3853 * Mask out any options we don't support
3854 * on any controller. Transfer options are
3855 * only available if we are negotiating wide.
3856 */
3857 ppr_options &= MSG_EXT_PPR_DT_REQ;
3858 if (bus_width == 0)
3859 ppr_options = 0;
3860
3861 ahc_validate_width(ahc, tinfo, &bus_width,
3862 devinfo->role);
3863 syncrate = ahc_devlimited_syncrate(ahc, tinfo, &period,
3864 &ppr_options,
3865 devinfo->role);
3866 ahc_validate_offset(ahc, tinfo, syncrate,
3867 &offset, bus_width,
3868 devinfo->role);
3869
3870 if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_PPR, TRUE)) {
3871 /*
3872 * If we are unable to do any of the
3873 * requested options (we went too low),
3874 * then we'll have to reject the message.
3875 */
3876 if (saved_width > bus_width
3877 || saved_offset != offset
3878 || saved_ppr_options != ppr_options) {
3879 reject = TRUE;
3880 period = 0;
3881 offset = 0;
3882 bus_width = 0;
3883 ppr_options = 0;
3884 syncrate = NULL;
3885 }
3886 } else {
3887 if (devinfo->role != ROLE_TARGET)
3888 printk("(%s:%c:%d:%d): Target "
3889 "Initiated PPR\n",
3890 ahc_name(ahc), devinfo->channel,
3891 devinfo->target, devinfo->lun);
3892 else
3893 printk("(%s:%c:%d:%d): Initiator "
3894 "Initiated PPR\n",
3895 ahc_name(ahc), devinfo->channel,
3896 devinfo->target, devinfo->lun);
3897 ahc->msgout_index = 0;
3898 ahc->msgout_len = 0;
3899 ahc_construct_ppr(ahc, devinfo, period, offset,
3900 bus_width, ppr_options);
3901 ahc->msgout_index = 0;
3902 response = TRUE;
3903 }
3904 if (bootverbose) {
3905 printk("(%s:%c:%d:%d): Received PPR width %x, "
3906 "period %x, offset %x,options %x\n"
3907 "\tFiltered to width %x, period %x, "
3908 "offset %x, options %x\n",
3909 ahc_name(ahc), devinfo->channel,
3910 devinfo->target, devinfo->lun,
3911 saved_width, ahc->msgin_buf[3],
3912 saved_offset, saved_ppr_options,
3913 bus_width, period, offset, ppr_options);
3914 }
3915 ahc_set_width(ahc, devinfo, bus_width,
3916 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL,
3917 /*paused*/TRUE);
3918 ahc_set_syncrate(ahc, devinfo,
3919 syncrate, period,
3920 offset, ppr_options,
3921 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL,
3922 /*paused*/TRUE);
3923 done = MSGLOOP_MSGCOMPLETE;
3924 break;
3925 }
3926 default:
3927 /* Unknown extended message. Reject it. */
3928 reject = TRUE;
3929 break;
3930 }
3931 break;
3932 }
3933 #ifdef AHC_TARGET_MODE
3934 case MSG_BUS_DEV_RESET:
3935 ahc_handle_devreset(ahc, devinfo,
3936 CAM_BDR_SENT,
3937 "Bus Device Reset Received",
3938 /*verbose_level*/0);
3939 ahc_restart(ahc);
3940 done = MSGLOOP_TERMINATED;
3941 break;
3942 case MSG_ABORT_TAG:
3943 case MSG_ABORT:
3944 case MSG_CLEAR_QUEUE:
3945 {
3946 int tag;
3947
3948 /* Target mode messages */
3949 if (devinfo->role != ROLE_TARGET) {
3950 reject = TRUE;
3951 break;
3952 }
3953 tag = SCB_LIST_NULL;
3954 if (ahc->msgin_buf[0] == MSG_ABORT_TAG)
3955 tag = ahc_inb(ahc, INITIATOR_TAG);
3956 ahc_abort_scbs(ahc, devinfo->target, devinfo->channel,
3957 devinfo->lun, tag, ROLE_TARGET,
3958 CAM_REQ_ABORTED);
3959
3960 tstate = ahc->enabled_targets[devinfo->our_scsiid];
3961 if (tstate != NULL) {
3962 struct ahc_tmode_lstate* lstate;
3963
3964 lstate = tstate->enabled_luns[devinfo->lun];
3965 if (lstate != NULL) {
3966 ahc_queue_lstate_event(ahc, lstate,
3967 devinfo->our_scsiid,
3968 ahc->msgin_buf[0],
3969 /*arg*/tag);
3970 ahc_send_lstate_events(ahc, lstate);
3971 }
3972 }
3973 ahc_restart(ahc);
3974 done = MSGLOOP_TERMINATED;
3975 break;
3976 }
3977 #endif
3978 case MSG_TERM_IO_PROC:
3979 default:
3980 reject = TRUE;
3981 break;
3982 }
3983
3984 if (reject) {
3985 /*
3986 * Setup to reject the message.
3987 */
3988 ahc->msgout_index = 0;
3989 ahc->msgout_len = 1;
3990 ahc->msgout_buf[0] = MSG_MESSAGE_REJECT;
3991 done = MSGLOOP_MSGCOMPLETE;
3992 response = TRUE;
3993 }
3994
3995 if (done != MSGLOOP_IN_PROG && !response)
3996 /* Clear the outgoing message buffer */
3997 ahc->msgout_len = 0;
3998
3999 return (done);
4000 }
4001
4002 /*
4003 * Process a message reject message.
4004 */
4005 static int
4006 ahc_handle_msg_reject(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
4007 {
4008 /*
4009 * What we care about here is if we had an
4010 * outstanding SDTR or WDTR message for this
4011 * target. If we did, this is a signal that
4012 * the target is refusing negotiation.
4013 */
4014 struct scb *scb;
4015 struct ahc_initiator_tinfo *tinfo;
4016 struct ahc_tmode_tstate *tstate;
4017 u_int scb_index;
4018 u_int last_msg;
4019 int response = 0;
4020
4021 scb_index = ahc_inb(ahc, SCB_TAG);
4022 scb = ahc_lookup_scb(ahc, scb_index);
4023 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel,
4024 devinfo->our_scsiid,
4025 devinfo->target, &tstate);
4026 /* Might be necessary */
4027 last_msg = ahc_inb(ahc, LAST_MSG);
4028
4029 if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_PPR, /*full*/FALSE)) {
4030 /*
4031 * Target does not support the PPR message.
4032 * Attempt to negotiate SPI-2 style.
4033 */
4034 if (bootverbose) {
4035 printk("(%s:%c:%d:%d): PPR Rejected. "
4036 "Trying WDTR/SDTR\n",
4037 ahc_name(ahc), devinfo->channel,
4038 devinfo->target, devinfo->lun);
4039 }
4040 tinfo->goal.ppr_options = 0;
4041 tinfo->curr.transport_version = 2;
4042 tinfo->goal.transport_version = 2;
4043 ahc->msgout_index = 0;
4044 ahc->msgout_len = 0;
4045 ahc_build_transfer_msg(ahc, devinfo);
4046 ahc->msgout_index = 0;
4047 response = 1;
4048 } else if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_WDTR, /*full*/FALSE)) {
4049
4050 /* note 8bit xfers */
4051 printk("(%s:%c:%d:%d): refuses WIDE negotiation. Using "
4052 "8bit transfers\n", ahc_name(ahc),
4053 devinfo->channel, devinfo->target, devinfo->lun);
4054 ahc_set_width(ahc, devinfo, MSG_EXT_WDTR_BUS_8_BIT,
4055 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL,
4056 /*paused*/TRUE);
4057 /*
4058 * No need to clear the sync rate. If the target
4059 * did not accept the command, our syncrate is
4060 * unaffected. If the target started the negotiation,
4061 * but rejected our response, we already cleared the
4062 * sync rate before sending our WDTR.
4063 */
4064 if (tinfo->goal.offset != tinfo->curr.offset) {
4065
4066 /* Start the sync negotiation */
4067 ahc->msgout_index = 0;
4068 ahc->msgout_len = 0;
4069 ahc_build_transfer_msg(ahc, devinfo);
4070 ahc->msgout_index = 0;
4071 response = 1;
4072 }
4073 } else if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_SDTR, /*full*/FALSE)) {
4074 /* note asynch xfers and clear flag */
4075 ahc_set_syncrate(ahc, devinfo, /*syncrate*/NULL, /*period*/0,
4076 /*offset*/0, /*ppr_options*/0,
4077 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL,
4078 /*paused*/TRUE);
4079 printk("(%s:%c:%d:%d): refuses synchronous negotiation. "
4080 "Using asynchronous transfers\n",
4081 ahc_name(ahc), devinfo->channel,
4082 devinfo->target, devinfo->lun);
4083 } else if ((scb->hscb->control & MSG_SIMPLE_TASK) != 0) {
4084 int tag_type;
4085 int mask;
4086
4087 tag_type = (scb->hscb->control & MSG_SIMPLE_TASK);
4088
4089 if (tag_type == MSG_SIMPLE_TASK) {
4090 printk("(%s:%c:%d:%d): refuses tagged commands. "
4091 "Performing non-tagged I/O\n", ahc_name(ahc),
4092 devinfo->channel, devinfo->target, devinfo->lun);
4093 ahc_set_tags(ahc, scb->io_ctx, devinfo, AHC_QUEUE_NONE);
4094 mask = ~0x23;
4095 } else {
4096 printk("(%s:%c:%d:%d): refuses %s tagged commands. "
4097 "Performing simple queue tagged I/O only\n",
4098 ahc_name(ahc), devinfo->channel, devinfo->target,
4099 devinfo->lun, tag_type == MSG_ORDERED_TASK
4100 ? "ordered" : "head of queue");
4101 ahc_set_tags(ahc, scb->io_ctx, devinfo, AHC_QUEUE_BASIC);
4102 mask = ~0x03;
4103 }
4104
4105 /*
4106 * Resend the identify for this CCB as the target
4107 * may believe that the selection is invalid otherwise.
4108 */
4109 ahc_outb(ahc, SCB_CONTROL,
4110 ahc_inb(ahc, SCB_CONTROL) & mask);
4111 scb->hscb->control &= mask;
4112 ahc_set_transaction_tag(scb, /*enabled*/FALSE,
4113 /*type*/MSG_SIMPLE_TASK);
4114 ahc_outb(ahc, MSG_OUT, MSG_IDENTIFYFLAG);
4115 ahc_assert_atn(ahc);
4116
4117 /*
4118 * This transaction is now at the head of
4119 * the untagged queue for this target.
4120 */
4121 if ((ahc->flags & AHC_SCB_BTT) == 0) {
4122 struct scb_tailq *untagged_q;
4123
4124 untagged_q =
4125 &(ahc->untagged_queues[devinfo->target_offset]);
4126 TAILQ_INSERT_HEAD(untagged_q, scb, links.tqe);
4127 scb->flags |= SCB_UNTAGGEDQ;
4128 }
4129 ahc_busy_tcl(ahc, BUILD_TCL(scb->hscb->scsiid, devinfo->lun),
4130 scb->hscb->tag);
4131
4132 /*
4133 * Requeue all tagged commands for this target
4134 * currently in our possession so they can be
4135 * converted to untagged commands.
4136 */
4137 ahc_search_qinfifo(ahc, SCB_GET_TARGET(ahc, scb),
4138 SCB_GET_CHANNEL(ahc, scb),
4139 SCB_GET_LUN(scb), /*tag*/SCB_LIST_NULL,
4140 ROLE_INITIATOR, CAM_REQUEUE_REQ,
4141 SEARCH_COMPLETE);
4142 } else {
4143 /*
4144 * Otherwise, we ignore it.
4145 */
4146 printk("%s:%c:%d: Message reject for %x -- ignored\n",
4147 ahc_name(ahc), devinfo->channel, devinfo->target,
4148 last_msg);
4149 }
4150 return (response);
4151 }
4152
4153 /*
4154 * Process an ingnore wide residue message.
4155 */
4156 static void
4157 ahc_handle_ign_wide_residue(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
4158 {
4159 u_int scb_index;
4160 struct scb *scb;
4161
4162 scb_index = ahc_inb(ahc, SCB_TAG);
4163 scb = ahc_lookup_scb(ahc, scb_index);
4164 /*
4165 * XXX Actually check data direction in the sequencer?
4166 * Perhaps add datadir to some spare bits in the hscb?
4167 */
4168 if ((ahc_inb(ahc, SEQ_FLAGS) & DPHASE) == 0
4169 || ahc_get_transfer_dir(scb) != CAM_DIR_IN) {
4170 /*
4171 * Ignore the message if we haven't
4172 * seen an appropriate data phase yet.
4173 */
4174 } else {
4175 /*
4176 * If the residual occurred on the last
4177 * transfer and the transfer request was
4178 * expected to end on an odd count, do
4179 * nothing. Otherwise, subtract a byte
4180 * and update the residual count accordingly.
4181 */
4182 uint32_t sgptr;
4183
4184 sgptr = ahc_inb(ahc, SCB_RESIDUAL_SGPTR);
4185 if ((sgptr & SG_LIST_NULL) != 0
4186 && (ahc_inb(ahc, SCB_LUN) & SCB_XFERLEN_ODD) != 0) {
4187 /*
4188 * If the residual occurred on the last
4189 * transfer and the transfer request was
4190 * expected to end on an odd count, do
4191 * nothing.
4192 */
4193 } else {
4194 struct ahc_dma_seg *sg;
4195 uint32_t data_cnt;
4196 uint32_t data_addr;
4197 uint32_t sglen;
4198
4199 /* Pull in all of the sgptr */
4200 sgptr = ahc_inl(ahc, SCB_RESIDUAL_SGPTR);
4201 data_cnt = ahc_inl(ahc, SCB_RESIDUAL_DATACNT);
4202
4203 if ((sgptr & SG_LIST_NULL) != 0) {
4204 /*
4205 * The residual data count is not updated
4206 * for the command run to completion case.
4207 * Explicitly zero the count.
4208 */
4209 data_cnt &= ~AHC_SG_LEN_MASK;
4210 }
4211
4212 data_addr = ahc_inl(ahc, SHADDR);
4213
4214 data_cnt += 1;
4215 data_addr -= 1;
4216 sgptr &= SG_PTR_MASK;
4217
4218 sg = ahc_sg_bus_to_virt(scb, sgptr);
4219
4220 /*
4221 * The residual sg ptr points to the next S/G
4222 * to load so we must go back one.
4223 */
4224 sg--;
4225 sglen = ahc_le32toh(sg->len) & AHC_SG_LEN_MASK;
4226 if (sg != scb->sg_list
4227 && sglen < (data_cnt & AHC_SG_LEN_MASK)) {
4228
4229 sg--;
4230 sglen = ahc_le32toh(sg->len);
4231 /*
4232 * Preserve High Address and SG_LIST bits
4233 * while setting the count to 1.
4234 */
4235 data_cnt = 1 | (sglen & (~AHC_SG_LEN_MASK));
4236 data_addr = ahc_le32toh(sg->addr)
4237 + (sglen & AHC_SG_LEN_MASK) - 1;
4238
4239 /*
4240 * Increment sg so it points to the
4241 * "next" sg.
4242 */
4243 sg++;
4244 sgptr = ahc_sg_virt_to_bus(scb, sg);
4245 }
4246 ahc_outl(ahc, SCB_RESIDUAL_SGPTR, sgptr);
4247 ahc_outl(ahc, SCB_RESIDUAL_DATACNT, data_cnt);
4248 /*
4249 * Toggle the "oddness" of the transfer length
4250 * to handle this mid-transfer ignore wide
4251 * residue. This ensures that the oddness is
4252 * correct for subsequent data transfers.
4253 */
4254 ahc_outb(ahc, SCB_LUN,
4255 ahc_inb(ahc, SCB_LUN) ^ SCB_XFERLEN_ODD);
4256 }
4257 }
4258 }
4259
4260
4261 /*
4262 * Reinitialize the data pointers for the active transfer
4263 * based on its current residual.
4264 */
4265 static void
4266 ahc_reinitialize_dataptrs(struct ahc_softc *ahc)
4267 {
4268 struct scb *scb;
4269 struct ahc_dma_seg *sg;
4270 u_int scb_index;
4271 uint32_t sgptr;
4272 uint32_t resid;
4273 uint32_t dataptr;
4274
4275 scb_index = ahc_inb(ahc, SCB_TAG);
4276 scb = ahc_lookup_scb(ahc, scb_index);
4277 sgptr = (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 3) << 24)
4278 | (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 2) << 16)
4279 | (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 1) << 8)
4280 | ahc_inb(ahc, SCB_RESIDUAL_SGPTR);
4281
4282 sgptr &= SG_PTR_MASK;
4283 sg = ahc_sg_bus_to_virt(scb, sgptr);
4284
4285 /* The residual sg_ptr always points to the next sg */
4286 sg--;
4287
4288 resid = (ahc_inb(ahc, SCB_RESIDUAL_DATACNT + 2) << 16)
4289 | (ahc_inb(ahc, SCB_RESIDUAL_DATACNT + 1) << 8)
4290 | ahc_inb(ahc, SCB_RESIDUAL_DATACNT);
4291
4292 dataptr = ahc_le32toh(sg->addr)
4293 + (ahc_le32toh(sg->len) & AHC_SG_LEN_MASK)
4294 - resid;
4295 if ((ahc->flags & AHC_39BIT_ADDRESSING) != 0) {
4296 u_int dscommand1;
4297
4298 dscommand1 = ahc_inb(ahc, DSCOMMAND1);
4299 ahc_outb(ahc, DSCOMMAND1, dscommand1 | HADDLDSEL0);
4300 ahc_outb(ahc, HADDR,
4301 (ahc_le32toh(sg->len) >> 24) & SG_HIGH_ADDR_BITS);
4302 ahc_outb(ahc, DSCOMMAND1, dscommand1);
4303 }
4304 ahc_outb(ahc, HADDR + 3, dataptr >> 24);
4305 ahc_outb(ahc, HADDR + 2, dataptr >> 16);
4306 ahc_outb(ahc, HADDR + 1, dataptr >> 8);
4307 ahc_outb(ahc, HADDR, dataptr);
4308 ahc_outb(ahc, HCNT + 2, resid >> 16);
4309 ahc_outb(ahc, HCNT + 1, resid >> 8);
4310 ahc_outb(ahc, HCNT, resid);
4311 if ((ahc->features & AHC_ULTRA2) == 0) {
4312 ahc_outb(ahc, STCNT + 2, resid >> 16);
4313 ahc_outb(ahc, STCNT + 1, resid >> 8);
4314 ahc_outb(ahc, STCNT, resid);
4315 }
4316 }
4317
4318 /*
4319 * Handle the effects of issuing a bus device reset message.
4320 */
4321 static void
4322 ahc_handle_devreset(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
4323 cam_status status, char *message, int verbose_level)
4324 {
4325 #ifdef AHC_TARGET_MODE
4326 struct ahc_tmode_tstate* tstate;
4327 u_int lun;
4328 #endif
4329 int found;
4330
4331 found = ahc_abort_scbs(ahc, devinfo->target, devinfo->channel,
4332 CAM_LUN_WILDCARD, SCB_LIST_NULL, devinfo->role,
4333 status);
4334
4335 #ifdef AHC_TARGET_MODE
4336 /*
4337 * Send an immediate notify ccb to all target mord peripheral
4338 * drivers affected by this action.
4339 */
4340 tstate = ahc->enabled_targets[devinfo->our_scsiid];
4341 if (tstate != NULL) {
4342 for (lun = 0; lun < AHC_NUM_LUNS; lun++) {
4343 struct ahc_tmode_lstate* lstate;
4344
4345 lstate = tstate->enabled_luns[lun];
4346 if (lstate == NULL)
4347 continue;
4348
4349 ahc_queue_lstate_event(ahc, lstate, devinfo->our_scsiid,
4350 MSG_BUS_DEV_RESET, /*arg*/0);
4351 ahc_send_lstate_events(ahc, lstate);
4352 }
4353 }
4354 #endif
4355
4356 /*
4357 * Go back to async/narrow transfers and renegotiate.
4358 */
4359 ahc_set_width(ahc, devinfo, MSG_EXT_WDTR_BUS_8_BIT,
4360 AHC_TRANS_CUR, /*paused*/TRUE);
4361 ahc_set_syncrate(ahc, devinfo, /*syncrate*/NULL,
4362 /*period*/0, /*offset*/0, /*ppr_options*/0,
4363 AHC_TRANS_CUR, /*paused*/TRUE);
4364
4365 if (status != CAM_SEL_TIMEOUT)
4366 ahc_send_async(ahc, devinfo->channel, devinfo->target,
4367 CAM_LUN_WILDCARD, AC_SENT_BDR);
4368
4369 if (message != NULL
4370 && (verbose_level <= bootverbose))
4371 printk("%s: %s on %c:%d. %d SCBs aborted\n", ahc_name(ahc),
4372 message, devinfo->channel, devinfo->target, found);
4373 }
4374
4375 #ifdef AHC_TARGET_MODE
4376 static void
4377 ahc_setup_target_msgin(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
4378 struct scb *scb)
4379 {
4380
4381 /*
4382 * To facilitate adding multiple messages together,
4383 * each routine should increment the index and len
4384 * variables instead of setting them explicitly.
4385 */
4386 ahc->msgout_index = 0;
4387 ahc->msgout_len = 0;
4388
4389 if (scb != NULL && (scb->flags & SCB_AUTO_NEGOTIATE) != 0)
4390 ahc_build_transfer_msg(ahc, devinfo);
4391 else
4392 panic("ahc_intr: AWAITING target message with no message");
4393
4394 ahc->msgout_index = 0;
4395 ahc->msg_type = MSG_TYPE_TARGET_MSGIN;
4396 }
4397 #endif
4398 /**************************** Initialization **********************************/
4399 /*
4400 * Allocate a controller structure for a new device
4401 * and perform initial initializion.
4402 */
4403 struct ahc_softc *
4404 ahc_alloc(void *platform_arg, char *name)
4405 {
4406 struct ahc_softc *ahc;
4407 int i;
4408
4409 #ifndef __FreeBSD__
4410 ahc = kmalloc(sizeof(*ahc), GFP_ATOMIC);
4411 if (!ahc) {
4412 printk("aic7xxx: cannot malloc softc!\n");
4413 kfree(name);
4414 return NULL;
4415 }
4416 #else
4417 ahc = device_get_softc((device_t)platform_arg);
4418 #endif
4419 memset(ahc, 0, sizeof(*ahc));
4420 ahc->seep_config = kmalloc(sizeof(*ahc->seep_config), GFP_ATOMIC);
4421 if (ahc->seep_config == NULL) {
4422 #ifndef __FreeBSD__
4423 kfree(ahc);
4424 #endif
4425 kfree(name);
4426 return (NULL);
4427 }
4428 LIST_INIT(&ahc->pending_scbs);
4429 /* We don't know our unit number until the OSM sets it */
4430 ahc->name = name;
4431 ahc->unit = -1;
4432 ahc->description = NULL;
4433 ahc->channel = 'A';
4434 ahc->channel_b = 'B';
4435 ahc->chip = AHC_NONE;
4436 ahc->features = AHC_FENONE;
4437 ahc->bugs = AHC_BUGNONE;
4438 ahc->flags = AHC_FNONE;
4439 /*
4440 * Default to all error reporting enabled with the
4441 * sequencer operating at its fastest speed.
4442 * The bus attach code may modify this.
4443 */
4444 ahc->seqctl = FASTMODE;
4445
4446 for (i = 0; i < AHC_NUM_TARGETS; i++)
4447 TAILQ_INIT(&ahc->untagged_queues[i]);
4448 if (ahc_platform_alloc(ahc, platform_arg) != 0) {
4449 ahc_free(ahc);
4450 ahc = NULL;
4451 }
4452 return (ahc);
4453 }
4454
4455 int
4456 ahc_softc_init(struct ahc_softc *ahc)
4457 {
4458
4459 /* The IRQMS bit is only valid on VL and EISA chips */
4460 if ((ahc->chip & AHC_PCI) == 0)
4461 ahc->unpause = ahc_inb(ahc, HCNTRL) & IRQMS;
4462 else
4463 ahc->unpause = 0;
4464 ahc->pause = ahc->unpause | PAUSE;
4465 /* XXX The shared scb data stuff should be deprecated */
4466 if (ahc->scb_data == NULL) {
4467 ahc->scb_data = kmalloc(sizeof(*ahc->scb_data), GFP_ATOMIC);
4468 if (ahc->scb_data == NULL)
4469 return (ENOMEM);
4470 memset(ahc->scb_data, 0, sizeof(*ahc->scb_data));
4471 }
4472
4473 return (0);
4474 }
4475
4476 void
4477 ahc_set_unit(struct ahc_softc *ahc, int unit)
4478 {
4479 ahc->unit = unit;
4480 }
4481
4482 void
4483 ahc_set_name(struct ahc_softc *ahc, char *name)
4484 {
4485 if (ahc->name != NULL)
4486 kfree(ahc->name);
4487 ahc->name = name;
4488 }
4489
4490 void
4491 ahc_free(struct ahc_softc *ahc)
4492 {
4493 int i;
4494
4495 switch (ahc->init_level) {
4496 default:
4497 case 5:
4498 ahc_shutdown(ahc);
4499 /* FALLTHROUGH */
4500 case 4:
4501 ahc_dmamap_unload(ahc, ahc->shared_data_dmat,
4502 ahc->shared_data_dmamap);
4503 /* FALLTHROUGH */
4504 case 3:
4505 ahc_dmamem_free(ahc, ahc->shared_data_dmat, ahc->qoutfifo,
4506 ahc->shared_data_dmamap);
4507 ahc_dmamap_destroy(ahc, ahc->shared_data_dmat,
4508 ahc->shared_data_dmamap);
4509 /* FALLTHROUGH */
4510 case 2:
4511 ahc_dma_tag_destroy(ahc, ahc->shared_data_dmat);
4512 case 1:
4513 #ifndef __linux__
4514 ahc_dma_tag_destroy(ahc, ahc->buffer_dmat);
4515 #endif
4516 break;
4517 case 0:
4518 break;
4519 }
4520
4521 #ifndef __linux__
4522 ahc_dma_tag_destroy(ahc, ahc->parent_dmat);
4523 #endif
4524 ahc_platform_free(ahc);
4525 ahc_fini_scbdata(ahc);
4526 for (i = 0; i < AHC_NUM_TARGETS; i++) {
4527 struct ahc_tmode_tstate *tstate;
4528
4529 tstate = ahc->enabled_targets[i];
4530 if (tstate != NULL) {
4531 #ifdef AHC_TARGET_MODE
4532 int j;
4533
4534 for (j = 0; j < AHC_NUM_LUNS; j++) {
4535 struct ahc_tmode_lstate *lstate;
4536
4537 lstate = tstate->enabled_luns[j];
4538 if (lstate != NULL) {
4539 xpt_free_path(lstate->path);
4540 kfree(lstate);
4541 }
4542 }
4543 #endif
4544 kfree(tstate);
4545 }
4546 }
4547 #ifdef AHC_TARGET_MODE
4548 if (ahc->black_hole != NULL) {
4549 xpt_free_path(ahc->black_hole->path);
4550 kfree(ahc->black_hole);
4551 }
4552 #endif
4553 if (ahc->name != NULL)
4554 kfree(ahc->name);
4555 if (ahc->seep_config != NULL)
4556 kfree(ahc->seep_config);
4557 #ifndef __FreeBSD__
4558 kfree(ahc);
4559 #endif
4560 return;
4561 }
4562
4563 static void
4564 ahc_shutdown(void *arg)
4565 {
4566 struct ahc_softc *ahc;
4567 int i;
4568
4569 ahc = (struct ahc_softc *)arg;
4570
4571 /* This will reset most registers to 0, but not all */
4572 ahc_reset(ahc, /*reinit*/FALSE);
4573 ahc_outb(ahc, SCSISEQ, 0);
4574 ahc_outb(ahc, SXFRCTL0, 0);
4575 ahc_outb(ahc, DSPCISTATUS, 0);
4576
4577 for (i = TARG_SCSIRATE; i < SCSICONF; i++)
4578 ahc_outb(ahc, i, 0);
4579 }
4580
4581 /*
4582 * Reset the controller and record some information about it
4583 * that is only available just after a reset. If "reinit" is
4584 * non-zero, this reset occurred after initial configuration
4585 * and the caller requests that the chip be fully reinitialized
4586 * to a runable state. Chip interrupts are *not* enabled after
4587 * a reinitialization. The caller must enable interrupts via
4588 * ahc_intr_enable().
4589 */
4590 int
4591 ahc_reset(struct ahc_softc *ahc, int reinit)
4592 {
4593 u_int sblkctl;
4594 u_int sxfrctl1_a, sxfrctl1_b;
4595 int error;
4596 int wait;
4597
4598 /*
4599 * Preserve the value of the SXFRCTL1 register for all channels.
4600 * It contains settings that affect termination and we don't want
4601 * to disturb the integrity of the bus.
4602 */
4603 ahc_pause(ahc);
4604 sxfrctl1_b = 0;
4605 if ((ahc->chip & AHC_CHIPID_MASK) == AHC_AIC7770) {
4606 u_int sblkctl;
4607
4608 /*
4609 * Save channel B's settings in case this chip
4610 * is setup for TWIN channel operation.
4611 */
4612 sblkctl = ahc_inb(ahc, SBLKCTL);
4613 ahc_outb(ahc, SBLKCTL, sblkctl | SELBUSB);
4614 sxfrctl1_b = ahc_inb(ahc, SXFRCTL1);
4615 ahc_outb(ahc, SBLKCTL, sblkctl & ~SELBUSB);
4616 }
4617 sxfrctl1_a = ahc_inb(ahc, SXFRCTL1);
4618
4619 ahc_outb(ahc, HCNTRL, CHIPRST | ahc->pause);
4620
4621 /*
4622 * Ensure that the reset has finished. We delay 1000us
4623 * prior to reading the register to make sure the chip
4624 * has sufficiently completed its reset to handle register
4625 * accesses.
4626 */
4627 wait = 1000;
4628 do {
4629 ahc_delay(1000);
4630 } while (--wait && !(ahc_inb(ahc, HCNTRL) & CHIPRSTACK));
4631
4632 if (wait == 0) {
4633 printk("%s: WARNING - Failed chip reset! "
4634 "Trying to initialize anyway.\n", ahc_name(ahc));
4635 }
4636 ahc_outb(ahc, HCNTRL, ahc->pause);
4637
4638 /* Determine channel configuration */
4639 sblkctl = ahc_inb(ahc, SBLKCTL) & (SELBUSB|SELWIDE);
4640 /* No Twin Channel PCI cards */
4641 if ((ahc->chip & AHC_PCI) != 0)
4642 sblkctl &= ~SELBUSB;
4643 switch (sblkctl) {
4644 case 0:
4645 /* Single Narrow Channel */
4646 break;
4647 case 2:
4648 /* Wide Channel */
4649 ahc->features |= AHC_WIDE;
4650 break;
4651 case 8:
4652 /* Twin Channel */
4653 ahc->features |= AHC_TWIN;
4654 break;
4655 default:
4656 printk(" Unsupported adapter type. Ignoring\n");
4657 return(-1);
4658 }
4659
4660 /*
4661 * Reload sxfrctl1.
4662 *
4663 * We must always initialize STPWEN to 1 before we
4664 * restore the saved values. STPWEN is initialized
4665 * to a tri-state condition which can only be cleared
4666 * by turning it on.
4667 */
4668 if ((ahc->features & AHC_TWIN) != 0) {
4669 u_int sblkctl;
4670
4671 sblkctl = ahc_inb(ahc, SBLKCTL);
4672 ahc_outb(ahc, SBLKCTL, sblkctl | SELBUSB);
4673 ahc_outb(ahc, SXFRCTL1, sxfrctl1_b);
4674 ahc_outb(ahc, SBLKCTL, sblkctl & ~SELBUSB);
4675 }
4676 ahc_outb(ahc, SXFRCTL1, sxfrctl1_a);
4677
4678 error = 0;
4679 if (reinit != 0)
4680 /*
4681 * If a recovery action has forced a chip reset,
4682 * re-initialize the chip to our liking.
4683 */
4684 error = ahc->bus_chip_init(ahc);
4685 #ifdef AHC_DUMP_SEQ
4686 else
4687 ahc_dumpseq(ahc);
4688 #endif
4689
4690 return (error);
4691 }
4692
4693 /*
4694 * Determine the number of SCBs available on the controller
4695 */
4696 int
4697 ahc_probe_scbs(struct ahc_softc *ahc) {
4698 int i;
4699
4700 for (i = 0; i < AHC_SCB_MAX; i++) {
4701
4702 ahc_outb(ahc, SCBPTR, i);
4703 ahc_outb(ahc, SCB_BASE, i);
4704 if (ahc_inb(ahc, SCB_BASE) != i)
4705 break;
4706 ahc_outb(ahc, SCBPTR, 0);
4707 if (ahc_inb(ahc, SCB_BASE) != 0)
4708 break;
4709 }
4710 return (i);
4711 }
4712
4713 static void
4714 ahc_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
4715 {
4716 dma_addr_t *baddr;
4717
4718 baddr = (dma_addr_t *)arg;
4719 *baddr = segs->ds_addr;
4720 }
4721
4722 static void
4723 ahc_build_free_scb_list(struct ahc_softc *ahc)
4724 {
4725 int scbsize;
4726 int i;
4727
4728 scbsize = 32;
4729 if ((ahc->flags & AHC_LSCBS_ENABLED) != 0)
4730 scbsize = 64;
4731
4732 for (i = 0; i < ahc->scb_data->maxhscbs; i++) {
4733 int j;
4734
4735 ahc_outb(ahc, SCBPTR, i);
4736
4737 /*
4738 * Touch all SCB bytes to avoid parity errors
4739 * should one of our debugging routines read
4740 * an otherwise uninitiatlized byte.
4741 */
4742 for (j = 0; j < scbsize; j++)
4743 ahc_outb(ahc, SCB_BASE+j, 0xFF);
4744
4745 /* Clear the control byte. */
4746 ahc_outb(ahc, SCB_CONTROL, 0);
4747
4748 /* Set the next pointer */
4749 if ((ahc->flags & AHC_PAGESCBS) != 0)
4750 ahc_outb(ahc, SCB_NEXT, i+1);
4751 else
4752 ahc_outb(ahc, SCB_NEXT, SCB_LIST_NULL);
4753
4754 /* Make the tag number, SCSIID, and lun invalid */
4755 ahc_outb(ahc, SCB_TAG, SCB_LIST_NULL);
4756 ahc_outb(ahc, SCB_SCSIID, 0xFF);
4757 ahc_outb(ahc, SCB_LUN, 0xFF);
4758 }
4759
4760 if ((ahc->flags & AHC_PAGESCBS) != 0) {
4761 /* SCB 0 heads the free list. */
4762 ahc_outb(ahc, FREE_SCBH, 0);
4763 } else {
4764 /* No free list. */
4765 ahc_outb(ahc, FREE_SCBH, SCB_LIST_NULL);
4766 }
4767
4768 /* Make sure that the last SCB terminates the free list */
4769 ahc_outb(ahc, SCBPTR, i-1);
4770 ahc_outb(ahc, SCB_NEXT, SCB_LIST_NULL);
4771 }
4772
4773 static int
4774 ahc_init_scbdata(struct ahc_softc *ahc)
4775 {
4776 struct scb_data *scb_data;
4777
4778 scb_data = ahc->scb_data;
4779 SLIST_INIT(&scb_data->free_scbs);
4780 SLIST_INIT(&scb_data->sg_maps);
4781
4782 /* Allocate SCB resources */
4783 scb_data->scbarray = kmalloc(sizeof(struct scb) * AHC_SCB_MAX_ALLOC, GFP_ATOMIC);
4784 if (scb_data->scbarray == NULL)
4785 return (ENOMEM);
4786 memset(scb_data->scbarray, 0, sizeof(struct scb) * AHC_SCB_MAX_ALLOC);
4787
4788 /* Determine the number of hardware SCBs and initialize them */
4789
4790 scb_data->maxhscbs = ahc_probe_scbs(ahc);
4791 if (ahc->scb_data->maxhscbs == 0) {
4792 printk("%s: No SCB space found\n", ahc_name(ahc));
4793 return (ENXIO);
4794 }
4795
4796 /*
4797 * Create our DMA tags. These tags define the kinds of device
4798 * accessible memory allocations and memory mappings we will
4799 * need to perform during normal operation.
4800 *
4801 * Unless we need to further restrict the allocation, we rely
4802 * on the restrictions of the parent dmat, hence the common
4803 * use of MAXADDR and MAXSIZE.
4804 */
4805
4806 /* DMA tag for our hardware scb structures */
4807 if (ahc_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/1,
4808 /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1,
4809 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
4810 /*highaddr*/BUS_SPACE_MAXADDR,
4811 /*filter*/NULL, /*filterarg*/NULL,
4812 AHC_SCB_MAX_ALLOC * sizeof(struct hardware_scb),
4813 /*nsegments*/1,
4814 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
4815 /*flags*/0, &scb_data->hscb_dmat) != 0) {
4816 goto error_exit;
4817 }
4818
4819 scb_data->init_level++;
4820
4821 /* Allocation for our hscbs */
4822 if (ahc_dmamem_alloc(ahc, scb_data->hscb_dmat,
4823 (void **)&scb_data->hscbs,
4824 BUS_DMA_NOWAIT, &scb_data->hscb_dmamap) != 0) {
4825 goto error_exit;
4826 }
4827
4828 scb_data->init_level++;
4829
4830 /* And permanently map them */
4831 ahc_dmamap_load(ahc, scb_data->hscb_dmat, scb_data->hscb_dmamap,
4832 scb_data->hscbs,
4833 AHC_SCB_MAX_ALLOC * sizeof(struct hardware_scb),
4834 ahc_dmamap_cb, &scb_data->hscb_busaddr, /*flags*/0);
4835
4836 scb_data->init_level++;
4837
4838 /* DMA tag for our sense buffers */
4839 if (ahc_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/1,
4840 /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1,
4841 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
4842 /*highaddr*/BUS_SPACE_MAXADDR,
4843 /*filter*/NULL, /*filterarg*/NULL,
4844 AHC_SCB_MAX_ALLOC * sizeof(struct scsi_sense_data),
4845 /*nsegments*/1,
4846 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
4847 /*flags*/0, &scb_data->sense_dmat) != 0) {
4848 goto error_exit;
4849 }
4850
4851 scb_data->init_level++;
4852
4853 /* Allocate them */
4854 if (ahc_dmamem_alloc(ahc, scb_data->sense_dmat,
4855 (void **)&scb_data->sense,
4856 BUS_DMA_NOWAIT, &scb_data->sense_dmamap) != 0) {
4857 goto error_exit;
4858 }
4859
4860 scb_data->init_level++;
4861
4862 /* And permanently map them */
4863 ahc_dmamap_load(ahc, scb_data->sense_dmat, scb_data->sense_dmamap,
4864 scb_data->sense,
4865 AHC_SCB_MAX_ALLOC * sizeof(struct scsi_sense_data),
4866 ahc_dmamap_cb, &scb_data->sense_busaddr, /*flags*/0);
4867
4868 scb_data->init_level++;
4869
4870 /* DMA tag for our S/G structures. We allocate in page sized chunks */
4871 if (ahc_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/8,
4872 /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1,
4873 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
4874 /*highaddr*/BUS_SPACE_MAXADDR,
4875 /*filter*/NULL, /*filterarg*/NULL,
4876 PAGE_SIZE, /*nsegments*/1,
4877 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
4878 /*flags*/0, &scb_data->sg_dmat) != 0) {
4879 goto error_exit;
4880 }
4881
4882 scb_data->init_level++;
4883
4884 /* Perform initial CCB allocation */
4885 memset(scb_data->hscbs, 0,
4886 AHC_SCB_MAX_ALLOC * sizeof(struct hardware_scb));
4887 ahc_alloc_scbs(ahc);
4888
4889 if (scb_data->numscbs == 0) {
4890 printk("%s: ahc_init_scbdata - "
4891 "Unable to allocate initial scbs\n",
4892 ahc_name(ahc));
4893 goto error_exit;
4894 }
4895
4896 /*
4897 * Reserve the next queued SCB.
4898 */
4899 ahc->next_queued_scb = ahc_get_scb(ahc);
4900
4901 /*
4902 * Note that we were successful
4903 */
4904 return (0);
4905
4906 error_exit:
4907
4908 return (ENOMEM);
4909 }
4910
4911 static void
4912 ahc_fini_scbdata(struct ahc_softc *ahc)
4913 {
4914 struct scb_data *scb_data;
4915
4916 scb_data = ahc->scb_data;
4917 if (scb_data == NULL)
4918 return;
4919
4920 switch (scb_data->init_level) {
4921 default:
4922 case 7:
4923 {
4924 struct sg_map_node *sg_map;
4925
4926 while ((sg_map = SLIST_FIRST(&scb_data->sg_maps))!= NULL) {
4927 SLIST_REMOVE_HEAD(&scb_data->sg_maps, links);
4928 ahc_dmamap_unload(ahc, scb_data->sg_dmat,
4929 sg_map->sg_dmamap);
4930 ahc_dmamem_free(ahc, scb_data->sg_dmat,
4931 sg_map->sg_vaddr,
4932 sg_map->sg_dmamap);
4933 kfree(sg_map);
4934 }
4935 ahc_dma_tag_destroy(ahc, scb_data->sg_dmat);
4936 }
4937 case 6:
4938 ahc_dmamap_unload(ahc, scb_data->sense_dmat,
4939 scb_data->sense_dmamap);
4940 case 5:
4941 ahc_dmamem_free(ahc, scb_data->sense_dmat, scb_data->sense,
4942 scb_data->sense_dmamap);
4943 ahc_dmamap_destroy(ahc, scb_data->sense_dmat,
4944 scb_data->sense_dmamap);
4945 case 4:
4946 ahc_dma_tag_destroy(ahc, scb_data->sense_dmat);
4947 case 3:
4948 ahc_dmamap_unload(ahc, scb_data->hscb_dmat,
4949 scb_data->hscb_dmamap);
4950 case 2:
4951 ahc_dmamem_free(ahc, scb_data->hscb_dmat, scb_data->hscbs,
4952 scb_data->hscb_dmamap);
4953 ahc_dmamap_destroy(ahc, scb_data->hscb_dmat,
4954 scb_data->hscb_dmamap);
4955 case 1:
4956 ahc_dma_tag_destroy(ahc, scb_data->hscb_dmat);
4957 break;
4958 case 0:
4959 break;
4960 }
4961 if (scb_data->scbarray != NULL)
4962 kfree(scb_data->scbarray);
4963 }
4964
4965 static void
4966 ahc_alloc_scbs(struct ahc_softc *ahc)
4967 {
4968 struct scb_data *scb_data;
4969 struct scb *next_scb;
4970 struct sg_map_node *sg_map;
4971 dma_addr_t physaddr;
4972 struct ahc_dma_seg *segs;
4973 int newcount;
4974 int i;
4975
4976 scb_data = ahc->scb_data;
4977 if (scb_data->numscbs >= AHC_SCB_MAX_ALLOC)
4978 /* Can't allocate any more */
4979 return;
4980
4981 next_scb = &scb_data->scbarray[scb_data->numscbs];
4982
4983 sg_map = kmalloc(sizeof(*sg_map), GFP_ATOMIC);
4984
4985 if (sg_map == NULL)
4986 return;
4987
4988 /* Allocate S/G space for the next batch of SCBS */
4989 if (ahc_dmamem_alloc(ahc, scb_data->sg_dmat,
4990 (void **)&sg_map->sg_vaddr,
4991 BUS_DMA_NOWAIT, &sg_map->sg_dmamap) != 0) {
4992 kfree(sg_map);
4993 return;
4994 }
4995
4996 SLIST_INSERT_HEAD(&scb_data->sg_maps, sg_map, links);
4997
4998 ahc_dmamap_load(ahc, scb_data->sg_dmat, sg_map->sg_dmamap,
4999 sg_map->sg_vaddr, PAGE_SIZE, ahc_dmamap_cb,
5000 &sg_map->sg_physaddr, /*flags*/0);
5001
5002 segs = sg_map->sg_vaddr;
5003 physaddr = sg_map->sg_physaddr;
5004
5005 newcount = (PAGE_SIZE / (AHC_NSEG * sizeof(struct ahc_dma_seg)));
5006 newcount = min(newcount, (AHC_SCB_MAX_ALLOC - scb_data->numscbs));
5007 for (i = 0; i < newcount; i++) {
5008 struct scb_platform_data *pdata;
5009 #ifndef __linux__
5010 int error;
5011 #endif
5012 pdata = kmalloc(sizeof(*pdata), GFP_ATOMIC);
5013 if (pdata == NULL)
5014 break;
5015 next_scb->platform_data = pdata;
5016 next_scb->sg_map = sg_map;
5017 next_scb->sg_list = segs;
5018 /*
5019 * The sequencer always starts with the second entry.
5020 * The first entry is embedded in the scb.
5021 */
5022 next_scb->sg_list_phys = physaddr + sizeof(struct ahc_dma_seg);
5023 next_scb->ahc_softc = ahc;
5024 next_scb->flags = SCB_FREE;
5025 #ifndef __linux__
5026 error = ahc_dmamap_create(ahc, ahc->buffer_dmat, /*flags*/0,
5027 &next_scb->dmamap);
5028 if (error != 0)
5029 break;
5030 #endif
5031 next_scb->hscb = &scb_data->hscbs[scb_data->numscbs];
5032 next_scb->hscb->tag = ahc->scb_data->numscbs;
5033 SLIST_INSERT_HEAD(&ahc->scb_data->free_scbs,
5034 next_scb, links.sle);
5035 segs += AHC_NSEG;
5036 physaddr += (AHC_NSEG * sizeof(struct ahc_dma_seg));
5037 next_scb++;
5038 ahc->scb_data->numscbs++;
5039 }
5040 }
5041
5042 void
5043 ahc_controller_info(struct ahc_softc *ahc, char *buf)
5044 {
5045 int len;
5046
5047 len = sprintf(buf, "%s: ", ahc_chip_names[ahc->chip & AHC_CHIPID_MASK]);
5048 buf += len;
5049 if ((ahc->features & AHC_TWIN) != 0)
5050 len = sprintf(buf, "Twin Channel, A SCSI Id=%d, "
5051 "B SCSI Id=%d, primary %c, ",
5052 ahc->our_id, ahc->our_id_b,
5053 (ahc->flags & AHC_PRIMARY_CHANNEL) + 'A');
5054 else {
5055 const char *speed;
5056 const char *type;
5057
5058 speed = "";
5059 if ((ahc->features & AHC_ULTRA) != 0) {
5060 speed = "Ultra ";
5061 } else if ((ahc->features & AHC_DT) != 0) {
5062 speed = "Ultra160 ";
5063 } else if ((ahc->features & AHC_ULTRA2) != 0) {
5064 speed = "Ultra2 ";
5065 }
5066 if ((ahc->features & AHC_WIDE) != 0) {
5067 type = "Wide";
5068 } else {
5069 type = "Single";
5070 }
5071 len = sprintf(buf, "%s%s Channel %c, SCSI Id=%d, ",
5072 speed, type, ahc->channel, ahc->our_id);
5073 }
5074 buf += len;
5075
5076 if ((ahc->flags & AHC_PAGESCBS) != 0)
5077 sprintf(buf, "%d/%d SCBs",
5078 ahc->scb_data->maxhscbs, AHC_MAX_QUEUE);
5079 else
5080 sprintf(buf, "%d SCBs", ahc->scb_data->maxhscbs);
5081 }
5082
5083 int
5084 ahc_chip_init(struct ahc_softc *ahc)
5085 {
5086 int term;
5087 int error;
5088 u_int i;
5089 u_int scsi_conf;
5090 u_int scsiseq_template;
5091 uint32_t physaddr;
5092
5093 ahc_outb(ahc, SEQ_FLAGS, 0);
5094 ahc_outb(ahc, SEQ_FLAGS2, 0);
5095
5096 /* Set the SCSI Id, SXFRCTL0, SXFRCTL1, and SIMODE1, for both channels*/
5097 if (ahc->features & AHC_TWIN) {
5098
5099 /*
5100 * Setup Channel B first.
5101 */
5102 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) | SELBUSB);
5103 term = (ahc->flags & AHC_TERM_ENB_B) != 0 ? STPWEN : 0;
5104 ahc_outb(ahc, SCSIID, ahc->our_id_b);
5105 scsi_conf = ahc_inb(ahc, SCSICONF + 1);
5106 ahc_outb(ahc, SXFRCTL1, (scsi_conf & (ENSPCHK|STIMESEL))
5107 |term|ahc->seltime_b|ENSTIMER|ACTNEGEN);
5108 if ((ahc->features & AHC_ULTRA2) != 0)
5109 ahc_outb(ahc, SIMODE0, ahc_inb(ahc, SIMODE0)|ENIOERR);
5110 ahc_outb(ahc, SIMODE1, ENSELTIMO|ENSCSIRST|ENSCSIPERR);
5111 ahc_outb(ahc, SXFRCTL0, DFON|SPIOEN);
5112
5113 /* Select Channel A */
5114 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) & ~SELBUSB);
5115 }
5116 term = (ahc->flags & AHC_TERM_ENB_A) != 0 ? STPWEN : 0;
5117 if ((ahc->features & AHC_ULTRA2) != 0)
5118 ahc_outb(ahc, SCSIID_ULTRA2, ahc->our_id);
5119 else
5120 ahc_outb(ahc, SCSIID, ahc->our_id);
5121 scsi_conf = ahc_inb(ahc, SCSICONF);
5122 ahc_outb(ahc, SXFRCTL1, (scsi_conf & (ENSPCHK|STIMESEL))
5123 |term|ahc->seltime
5124 |ENSTIMER|ACTNEGEN);
5125 if ((ahc->features & AHC_ULTRA2) != 0)
5126 ahc_outb(ahc, SIMODE0, ahc_inb(ahc, SIMODE0)|ENIOERR);
5127 ahc_outb(ahc, SIMODE1, ENSELTIMO|ENSCSIRST|ENSCSIPERR);
5128 ahc_outb(ahc, SXFRCTL0, DFON|SPIOEN);
5129
5130 /* There are no untagged SCBs active yet. */
5131 for (i = 0; i < 16; i++) {
5132 ahc_unbusy_tcl(ahc, BUILD_TCL(i << 4, 0));
5133 if ((ahc->flags & AHC_SCB_BTT) != 0) {
5134 int lun;
5135
5136 /*
5137 * The SCB based BTT allows an entry per
5138 * target and lun pair.
5139 */
5140 for (lun = 1; lun < AHC_NUM_LUNS; lun++)
5141 ahc_unbusy_tcl(ahc, BUILD_TCL(i << 4, lun));
5142 }
5143 }
5144
5145 /* All of our queues are empty */
5146 for (i = 0; i < 256; i++)
5147 ahc->qoutfifo[i] = SCB_LIST_NULL;
5148 ahc_sync_qoutfifo(ahc, BUS_DMASYNC_PREREAD);
5149
5150 for (i = 0; i < 256; i++)
5151 ahc->qinfifo[i] = SCB_LIST_NULL;
5152
5153 if ((ahc->features & AHC_MULTI_TID) != 0) {
5154 ahc_outb(ahc, TARGID, 0);
5155 ahc_outb(ahc, TARGID + 1, 0);
5156 }
5157
5158 /*
5159 * Tell the sequencer where it can find our arrays in memory.
5160 */
5161 physaddr = ahc->scb_data->hscb_busaddr;
5162 ahc_outb(ahc, HSCB_ADDR, physaddr & 0xFF);
5163 ahc_outb(ahc, HSCB_ADDR + 1, (physaddr >> 8) & 0xFF);
5164 ahc_outb(ahc, HSCB_ADDR + 2, (physaddr >> 16) & 0xFF);
5165 ahc_outb(ahc, HSCB_ADDR + 3, (physaddr >> 24) & 0xFF);
5166
5167 physaddr = ahc->shared_data_busaddr;
5168 ahc_outb(ahc, SHARED_DATA_ADDR, physaddr & 0xFF);
5169 ahc_outb(ahc, SHARED_DATA_ADDR + 1, (physaddr >> 8) & 0xFF);
5170 ahc_outb(ahc, SHARED_DATA_ADDR + 2, (physaddr >> 16) & 0xFF);
5171 ahc_outb(ahc, SHARED_DATA_ADDR + 3, (physaddr >> 24) & 0xFF);
5172
5173 /*
5174 * Initialize the group code to command length table.
5175 * This overrides the values in TARG_SCSIRATE, so only
5176 * setup the table after we have processed that information.
5177 */
5178 ahc_outb(ahc, CMDSIZE_TABLE, 5);
5179 ahc_outb(ahc, CMDSIZE_TABLE + 1, 9);
5180 ahc_outb(ahc, CMDSIZE_TABLE + 2, 9);
5181 ahc_outb(ahc, CMDSIZE_TABLE + 3, 0);
5182 ahc_outb(ahc, CMDSIZE_TABLE + 4, 15);
5183 ahc_outb(ahc, CMDSIZE_TABLE + 5, 11);
5184 ahc_outb(ahc, CMDSIZE_TABLE + 6, 0);
5185 ahc_outb(ahc, CMDSIZE_TABLE + 7, 0);
5186
5187 if ((ahc->features & AHC_HS_MAILBOX) != 0)
5188 ahc_outb(ahc, HS_MAILBOX, 0);
5189
5190 /* Tell the sequencer of our initial queue positions */
5191 if ((ahc->features & AHC_TARGETMODE) != 0) {
5192 ahc->tqinfifonext = 1;
5193 ahc_outb(ahc, KERNEL_TQINPOS, ahc->tqinfifonext - 1);
5194 ahc_outb(ahc, TQINPOS, ahc->tqinfifonext);
5195 }
5196 ahc->qinfifonext = 0;
5197 ahc->qoutfifonext = 0;
5198 if ((ahc->features & AHC_QUEUE_REGS) != 0) {
5199 ahc_outb(ahc, QOFF_CTLSTA, SCB_QSIZE_256);
5200 ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext);
5201 ahc_outb(ahc, SNSCB_QOFF, ahc->qinfifonext);
5202 ahc_outb(ahc, SDSCB_QOFF, 0);
5203 } else {
5204 ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext);
5205 ahc_outb(ahc, QINPOS, ahc->qinfifonext);
5206 ahc_outb(ahc, QOUTPOS, ahc->qoutfifonext);
5207 }
5208
5209 /* We don't have any waiting selections */
5210 ahc_outb(ahc, WAITING_SCBH, SCB_LIST_NULL);
5211
5212 /* Our disconnection list is empty too */
5213 ahc_outb(ahc, DISCONNECTED_SCBH, SCB_LIST_NULL);
5214
5215 /* Message out buffer starts empty */
5216 ahc_outb(ahc, MSG_OUT, MSG_NOOP);
5217
5218 /*
5219 * Setup the allowed SCSI Sequences based on operational mode.
5220 * If we are a target, we'll enable select in operations once
5221 * we've had a lun enabled.
5222 */
5223 scsiseq_template = ENSELO|ENAUTOATNO|ENAUTOATNP;
5224 if ((ahc->flags & AHC_INITIATORROLE) != 0)
5225 scsiseq_template |= ENRSELI;
5226 ahc_outb(ahc, SCSISEQ_TEMPLATE, scsiseq_template);
5227
5228 /* Initialize our list of free SCBs. */
5229 ahc_build_free_scb_list(ahc);
5230
5231 /*
5232 * Tell the sequencer which SCB will be the next one it receives.
5233 */
5234 ahc_outb(ahc, NEXT_QUEUED_SCB, ahc->next_queued_scb->hscb->tag);
5235
5236 /*
5237 * Load the Sequencer program and Enable the adapter
5238 * in "fast" mode.
5239 */
5240 if (bootverbose)
5241 printk("%s: Downloading Sequencer Program...",
5242 ahc_name(ahc));
5243
5244 error = ahc_loadseq(ahc);
5245 if (error != 0)
5246 return (error);
5247
5248 if ((ahc->features & AHC_ULTRA2) != 0) {
5249 int wait;
5250
5251 /*
5252 * Wait for up to 500ms for our transceivers
5253 * to settle. If the adapter does not have
5254 * a cable attached, the transceivers may
5255 * never settle, so don't complain if we
5256 * fail here.
5257 */
5258 for (wait = 5000;
5259 (ahc_inb(ahc, SBLKCTL) & (ENAB40|ENAB20)) == 0 && wait;
5260 wait--)
5261 ahc_delay(100);
5262 }
5263 ahc_restart(ahc);
5264 return (0);
5265 }
5266
5267 /*
5268 * Start the board, ready for normal operation
5269 */
5270 int
5271 ahc_init(struct ahc_softc *ahc)
5272 {
5273 int max_targ;
5274 u_int i;
5275 u_int scsi_conf;
5276 u_int ultraenb;
5277 u_int discenable;
5278 u_int tagenable;
5279 size_t driver_data_size;
5280
5281 #ifdef AHC_DEBUG
5282 if ((ahc_debug & AHC_DEBUG_SEQUENCER) != 0)
5283 ahc->flags |= AHC_SEQUENCER_DEBUG;
5284 #endif
5285
5286 #ifdef AHC_PRINT_SRAM
5287 printk("Scratch Ram:");
5288 for (i = 0x20; i < 0x5f; i++) {
5289 if (((i % 8) == 0) && (i != 0)) {
5290 printk ("\n ");
5291 }
5292 printk (" 0x%x", ahc_inb(ahc, i));
5293 }
5294 if ((ahc->features & AHC_MORE_SRAM) != 0) {
5295 for (i = 0x70; i < 0x7f; i++) {
5296 if (((i % 8) == 0) && (i != 0)) {
5297 printk ("\n ");
5298 }
5299 printk (" 0x%x", ahc_inb(ahc, i));
5300 }
5301 }
5302 printk ("\n");
5303 /*
5304 * Reading uninitialized scratch ram may
5305 * generate parity errors.
5306 */
5307 ahc_outb(ahc, CLRINT, CLRPARERR);
5308 ahc_outb(ahc, CLRINT, CLRBRKADRINT);
5309 #endif
5310 max_targ = 15;
5311
5312 /*
5313 * Assume we have a board at this stage and it has been reset.
5314 */
5315 if ((ahc->flags & AHC_USEDEFAULTS) != 0)
5316 ahc->our_id = ahc->our_id_b = 7;
5317
5318 /*
5319 * Default to allowing initiator operations.
5320 */
5321 ahc->flags |= AHC_INITIATORROLE;
5322
5323 /*
5324 * Only allow target mode features if this unit has them enabled.
5325 */
5326 if ((AHC_TMODE_ENABLE & (0x1 << ahc->unit)) == 0)
5327 ahc->features &= ~AHC_TARGETMODE;
5328
5329 #ifndef __linux__
5330 /* DMA tag for mapping buffers into device visible space. */
5331 if (ahc_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/1,
5332 /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1,
5333 /*lowaddr*/ahc->flags & AHC_39BIT_ADDRESSING
5334 ? (dma_addr_t)0x7FFFFFFFFFULL
5335 : BUS_SPACE_MAXADDR_32BIT,
5336 /*highaddr*/BUS_SPACE_MAXADDR,
5337 /*filter*/NULL, /*filterarg*/NULL,
5338 /*maxsize*/(AHC_NSEG - 1) * PAGE_SIZE,
5339 /*nsegments*/AHC_NSEG,
5340 /*maxsegsz*/AHC_MAXTRANSFER_SIZE,
5341 /*flags*/BUS_DMA_ALLOCNOW,
5342 &ahc->buffer_dmat) != 0) {
5343 return (ENOMEM);
5344 }
5345 #endif
5346
5347 ahc->init_level++;
5348
5349 /*
5350 * DMA tag for our command fifos and other data in system memory
5351 * the card's sequencer must be able to access. For initiator
5352 * roles, we need to allocate space for the qinfifo and qoutfifo.
5353 * The qinfifo and qoutfifo are composed of 256 1 byte elements.
5354 * When providing for the target mode role, we must additionally
5355 * provide space for the incoming target command fifo and an extra
5356 * byte to deal with a dma bug in some chip versions.
5357 */
5358 driver_data_size = 2 * 256 * sizeof(uint8_t);
5359 if ((ahc->features & AHC_TARGETMODE) != 0)
5360 driver_data_size += AHC_TMODE_CMDS * sizeof(struct target_cmd)
5361 + /*DMA WideOdd Bug Buffer*/1;
5362 if (ahc_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/1,
5363 /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1,
5364 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
5365 /*highaddr*/BUS_SPACE_MAXADDR,
5366 /*filter*/NULL, /*filterarg*/NULL,
5367 driver_data_size,
5368 /*nsegments*/1,
5369 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
5370 /*flags*/0, &ahc->shared_data_dmat) != 0) {
5371 return (ENOMEM);
5372 }
5373
5374 ahc->init_level++;
5375
5376 /* Allocation of driver data */
5377 if (ahc_dmamem_alloc(ahc, ahc->shared_data_dmat,
5378 (void **)&ahc->qoutfifo,
5379 BUS_DMA_NOWAIT, &ahc->shared_data_dmamap) != 0) {
5380 return (ENOMEM);
5381 }
5382
5383 ahc->init_level++;
5384
5385 /* And permanently map it in */
5386 ahc_dmamap_load(ahc, ahc->shared_data_dmat, ahc->shared_data_dmamap,
5387 ahc->qoutfifo, driver_data_size, ahc_dmamap_cb,
5388 &ahc->shared_data_busaddr, /*flags*/0);
5389
5390 if ((ahc->features & AHC_TARGETMODE) != 0) {
5391 ahc->targetcmds = (struct target_cmd *)ahc->qoutfifo;
5392 ahc->qoutfifo = (uint8_t *)&ahc->targetcmds[AHC_TMODE_CMDS];
5393 ahc->dma_bug_buf = ahc->shared_data_busaddr
5394 + driver_data_size - 1;
5395 /* All target command blocks start out invalid. */
5396 for (i = 0; i < AHC_TMODE_CMDS; i++)
5397 ahc->targetcmds[i].cmd_valid = 0;
5398 ahc_sync_tqinfifo(ahc, BUS_DMASYNC_PREREAD);
5399 ahc->qoutfifo = (uint8_t *)&ahc->targetcmds[256];
5400 }
5401 ahc->qinfifo = &ahc->qoutfifo[256];
5402
5403 ahc->init_level++;
5404
5405 /* Allocate SCB data now that buffer_dmat is initialized */
5406 if (ahc->scb_data->maxhscbs == 0)
5407 if (ahc_init_scbdata(ahc) != 0)
5408 return (ENOMEM);
5409
5410 /*
5411 * Allocate a tstate to house information for our
5412 * initiator presence on the bus as well as the user
5413 * data for any target mode initiator.
5414 */
5415 if (ahc_alloc_tstate(ahc, ahc->our_id, 'A') == NULL) {
5416 printk("%s: unable to allocate ahc_tmode_tstate. "
5417 "Failing attach\n", ahc_name(ahc));
5418 return (ENOMEM);
5419 }
5420
5421 if ((ahc->features & AHC_TWIN) != 0) {
5422 if (ahc_alloc_tstate(ahc, ahc->our_id_b, 'B') == NULL) {
5423 printk("%s: unable to allocate ahc_tmode_tstate. "
5424 "Failing attach\n", ahc_name(ahc));
5425 return (ENOMEM);
5426 }
5427 }
5428
5429 if (ahc->scb_data->maxhscbs < AHC_SCB_MAX_ALLOC) {
5430 ahc->flags |= AHC_PAGESCBS;
5431 } else {
5432 ahc->flags &= ~AHC_PAGESCBS;
5433 }
5434
5435 #ifdef AHC_DEBUG
5436 if (ahc_debug & AHC_SHOW_MISC) {
5437 printk("%s: hardware scb %u bytes; kernel scb %u bytes; "
5438 "ahc_dma %u bytes\n",
5439 ahc_name(ahc),
5440 (u_int)sizeof(struct hardware_scb),
5441 (u_int)sizeof(struct scb),
5442 (u_int)sizeof(struct ahc_dma_seg));
5443 }
5444 #endif /* AHC_DEBUG */
5445
5446 /*
5447 * Look at the information that board initialization or
5448 * the board bios has left us.
5449 */
5450 if (ahc->features & AHC_TWIN) {
5451 scsi_conf = ahc_inb(ahc, SCSICONF + 1);
5452 if ((scsi_conf & RESET_SCSI) != 0
5453 && (ahc->flags & AHC_INITIATORROLE) != 0)
5454 ahc->flags |= AHC_RESET_BUS_B;
5455 }
5456
5457 scsi_conf = ahc_inb(ahc, SCSICONF);
5458 if ((scsi_conf & RESET_SCSI) != 0
5459 && (ahc->flags & AHC_INITIATORROLE) != 0)
5460 ahc->flags |= AHC_RESET_BUS_A;
5461
5462 ultraenb = 0;
5463 tagenable = ALL_TARGETS_MASK;
5464
5465 /* Grab the disconnection disable table and invert it for our needs */
5466 if ((ahc->flags & AHC_USEDEFAULTS) != 0) {
5467 printk("%s: Host Adapter Bios disabled. Using default SCSI "
5468 "device parameters\n", ahc_name(ahc));
5469 ahc->flags |= AHC_EXTENDED_TRANS_A|AHC_EXTENDED_TRANS_B|
5470 AHC_TERM_ENB_A|AHC_TERM_ENB_B;
5471 discenable = ALL_TARGETS_MASK;
5472 if ((ahc->features & AHC_ULTRA) != 0)
5473 ultraenb = ALL_TARGETS_MASK;
5474 } else {
5475 discenable = ~((ahc_inb(ahc, DISC_DSB + 1) << 8)
5476 | ahc_inb(ahc, DISC_DSB));
5477 if ((ahc->features & (AHC_ULTRA|AHC_ULTRA2)) != 0)
5478 ultraenb = (ahc_inb(ahc, ULTRA_ENB + 1) << 8)
5479 | ahc_inb(ahc, ULTRA_ENB);
5480 }
5481
5482 if ((ahc->features & (AHC_WIDE|AHC_TWIN)) == 0)
5483 max_targ = 7;
5484
5485 for (i = 0; i <= max_targ; i++) {
5486 struct ahc_initiator_tinfo *tinfo;
5487 struct ahc_tmode_tstate *tstate;
5488 u_int our_id;
5489 u_int target_id;
5490 char channel;
5491
5492 channel = 'A';
5493 our_id = ahc->our_id;
5494 target_id = i;
5495 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
5496 channel = 'B';
5497 our_id = ahc->our_id_b;
5498 target_id = i % 8;
5499 }
5500 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
5501 target_id, &tstate);
5502 /* Default to async narrow across the board */
5503 memset(tinfo, 0, sizeof(*tinfo));
5504 if (ahc->flags & AHC_USEDEFAULTS) {
5505 if ((ahc->features & AHC_WIDE) != 0)
5506 tinfo->user.width = MSG_EXT_WDTR_BUS_16_BIT;
5507
5508 /*
5509 * These will be truncated when we determine the
5510 * connection type we have with the target.
5511 */
5512 tinfo->user.period = ahc_syncrates->period;
5513 tinfo->user.offset = MAX_OFFSET;
5514 } else {
5515 u_int scsirate;
5516 uint16_t mask;
5517
5518 /* Take the settings leftover in scratch RAM. */
5519 scsirate = ahc_inb(ahc, TARG_SCSIRATE + i);
5520 mask = (0x01 << i);
5521 if ((ahc->features & AHC_ULTRA2) != 0) {
5522 u_int offset;
5523 u_int maxsync;
5524
5525 if ((scsirate & SOFS) == 0x0F) {
5526 /*
5527 * Haven't negotiated yet,
5528 * so the format is different.
5529 */
5530 scsirate = (scsirate & SXFR) >> 4
5531 | (ultraenb & mask)
5532 ? 0x08 : 0x0
5533 | (scsirate & WIDEXFER);
5534 offset = MAX_OFFSET_ULTRA2;
5535 } else
5536 offset = ahc_inb(ahc, TARG_OFFSET + i);
5537 if ((scsirate & ~WIDEXFER) == 0 && offset != 0)
5538 /* Set to the lowest sync rate, 5MHz */
5539 scsirate |= 0x1c;
5540 maxsync = AHC_SYNCRATE_ULTRA2;
5541 if ((ahc->features & AHC_DT) != 0)
5542 maxsync = AHC_SYNCRATE_DT;
5543 tinfo->user.period =
5544 ahc_find_period(ahc, scsirate, maxsync);
5545 if (offset == 0)
5546 tinfo->user.period = 0;
5547 else
5548 tinfo->user.offset = MAX_OFFSET;
5549 if ((scsirate & SXFR_ULTRA2) <= 8/*10MHz*/
5550 && (ahc->features & AHC_DT) != 0)
5551 tinfo->user.ppr_options =
5552 MSG_EXT_PPR_DT_REQ;
5553 } else if ((scsirate & SOFS) != 0) {
5554 if ((scsirate & SXFR) == 0x40
5555 && (ultraenb & mask) != 0) {
5556 /* Treat 10MHz as a non-ultra speed */
5557 scsirate &= ~SXFR;
5558 ultraenb &= ~mask;
5559 }
5560 tinfo->user.period =
5561 ahc_find_period(ahc, scsirate,
5562 (ultraenb & mask)
5563 ? AHC_SYNCRATE_ULTRA
5564 : AHC_SYNCRATE_FAST);
5565 if (tinfo->user.period != 0)
5566 tinfo->user.offset = MAX_OFFSET;
5567 }
5568 if (tinfo->user.period == 0)
5569 tinfo->user.offset = 0;
5570 if ((scsirate & WIDEXFER) != 0
5571 && (ahc->features & AHC_WIDE) != 0)
5572 tinfo->user.width = MSG_EXT_WDTR_BUS_16_BIT;
5573 tinfo->user.protocol_version = 4;
5574 if ((ahc->features & AHC_DT) != 0)
5575 tinfo->user.transport_version = 3;
5576 else
5577 tinfo->user.transport_version = 2;
5578 tinfo->goal.protocol_version = 2;
5579 tinfo->goal.transport_version = 2;
5580 tinfo->curr.protocol_version = 2;
5581 tinfo->curr.transport_version = 2;
5582 }
5583 tstate->ultraenb = 0;
5584 }
5585 ahc->user_discenable = discenable;
5586 ahc->user_tagenable = tagenable;
5587
5588 return (ahc->bus_chip_init(ahc));
5589 }
5590
5591 void
5592 ahc_intr_enable(struct ahc_softc *ahc, int enable)
5593 {
5594 u_int hcntrl;
5595
5596 hcntrl = ahc_inb(ahc, HCNTRL);
5597 hcntrl &= ~INTEN;
5598 ahc->pause &= ~INTEN;
5599 ahc->unpause &= ~INTEN;
5600 if (enable) {
5601 hcntrl |= INTEN;
5602 ahc->pause |= INTEN;
5603 ahc->unpause |= INTEN;
5604 }
5605 ahc_outb(ahc, HCNTRL, hcntrl);
5606 }
5607
5608 /*
5609 * Ensure that the card is paused in a location
5610 * outside of all critical sections and that all
5611 * pending work is completed prior to returning.
5612 * This routine should only be called from outside
5613 * an interrupt context.
5614 */
5615 void
5616 ahc_pause_and_flushwork(struct ahc_softc *ahc)
5617 {
5618 int intstat;
5619 int maxloops;
5620 int paused;
5621
5622 maxloops = 1000;
5623 ahc->flags |= AHC_ALL_INTERRUPTS;
5624 paused = FALSE;
5625 do {
5626 if (paused) {
5627 ahc_unpause(ahc);
5628 /*
5629 * Give the sequencer some time to service
5630 * any active selections.
5631 */
5632 ahc_delay(500);
5633 }
5634 ahc_intr(ahc);
5635 ahc_pause(ahc);
5636 paused = TRUE;
5637 ahc_outb(ahc, SCSISEQ, ahc_inb(ahc, SCSISEQ) & ~ENSELO);
5638 intstat = ahc_inb(ahc, INTSTAT);
5639 if ((intstat & INT_PEND) == 0) {
5640 ahc_clear_critical_section(ahc);
5641 intstat = ahc_inb(ahc, INTSTAT);
5642 }
5643 } while (--maxloops
5644 && (intstat != 0xFF || (ahc->features & AHC_REMOVABLE) == 0)
5645 && ((intstat & INT_PEND) != 0
5646 || (ahc_inb(ahc, SSTAT0) & (SELDO|SELINGO)) != 0));
5647 if (maxloops == 0) {
5648 printk("Infinite interrupt loop, INTSTAT = %x",
5649 ahc_inb(ahc, INTSTAT));
5650 }
5651 ahc_platform_flushwork(ahc);
5652 ahc->flags &= ~AHC_ALL_INTERRUPTS;
5653 }
5654
5655 #ifdef CONFIG_PM
5656 int
5657 ahc_suspend(struct ahc_softc *ahc)
5658 {
5659
5660 ahc_pause_and_flushwork(ahc);
5661
5662 if (LIST_FIRST(&ahc->pending_scbs) != NULL) {
5663 ahc_unpause(ahc);
5664 return (EBUSY);
5665 }
5666
5667 #ifdef AHC_TARGET_MODE
5668 /*
5669 * XXX What about ATIOs that have not yet been serviced?
5670 * Perhaps we should just refuse to be suspended if we
5671 * are acting in a target role.
5672 */
5673 if (ahc->pending_device != NULL) {
5674 ahc_unpause(ahc);
5675 return (EBUSY);
5676 }
5677 #endif
5678 ahc_shutdown(ahc);
5679 return (0);
5680 }
5681
5682 int
5683 ahc_resume(struct ahc_softc *ahc)
5684 {
5685
5686 ahc_reset(ahc, /*reinit*/TRUE);
5687 ahc_intr_enable(ahc, TRUE);
5688 ahc_restart(ahc);
5689 return (0);
5690 }
5691 #endif
5692 /************************** Busy Target Table *********************************/
5693 /*
5694 * Return the untagged transaction id for a given target/channel lun.
5695 * Optionally, clear the entry.
5696 */
5697 static u_int
5698 ahc_index_busy_tcl(struct ahc_softc *ahc, u_int tcl)
5699 {
5700 u_int scbid;
5701 u_int target_offset;
5702
5703 if ((ahc->flags & AHC_SCB_BTT) != 0) {
5704 u_int saved_scbptr;
5705
5706 saved_scbptr = ahc_inb(ahc, SCBPTR);
5707 ahc_outb(ahc, SCBPTR, TCL_LUN(tcl));
5708 scbid = ahc_inb(ahc, SCB_64_BTT + TCL_TARGET_OFFSET(tcl));
5709 ahc_outb(ahc, SCBPTR, saved_scbptr);
5710 } else {
5711 target_offset = TCL_TARGET_OFFSET(tcl);
5712 scbid = ahc_inb(ahc, BUSY_TARGETS + target_offset);
5713 }
5714
5715 return (scbid);
5716 }
5717
5718 static void
5719 ahc_unbusy_tcl(struct ahc_softc *ahc, u_int tcl)
5720 {
5721 u_int target_offset;
5722
5723 if ((ahc->flags & AHC_SCB_BTT) != 0) {
5724 u_int saved_scbptr;
5725
5726 saved_scbptr = ahc_inb(ahc, SCBPTR);
5727 ahc_outb(ahc, SCBPTR, TCL_LUN(tcl));
5728 ahc_outb(ahc, SCB_64_BTT+TCL_TARGET_OFFSET(tcl), SCB_LIST_NULL);
5729 ahc_outb(ahc, SCBPTR, saved_scbptr);
5730 } else {
5731 target_offset = TCL_TARGET_OFFSET(tcl);
5732 ahc_outb(ahc, BUSY_TARGETS + target_offset, SCB_LIST_NULL);
5733 }
5734 }
5735
5736 static void
5737 ahc_busy_tcl(struct ahc_softc *ahc, u_int tcl, u_int scbid)
5738 {
5739 u_int target_offset;
5740
5741 if ((ahc->flags & AHC_SCB_BTT) != 0) {
5742 u_int saved_scbptr;
5743
5744 saved_scbptr = ahc_inb(ahc, SCBPTR);
5745 ahc_outb(ahc, SCBPTR, TCL_LUN(tcl));
5746 ahc_outb(ahc, SCB_64_BTT + TCL_TARGET_OFFSET(tcl), scbid);
5747 ahc_outb(ahc, SCBPTR, saved_scbptr);
5748 } else {
5749 target_offset = TCL_TARGET_OFFSET(tcl);
5750 ahc_outb(ahc, BUSY_TARGETS + target_offset, scbid);
5751 }
5752 }
5753
5754 /************************** SCB and SCB queue management **********************/
5755 int
5756 ahc_match_scb(struct ahc_softc *ahc, struct scb *scb, int target,
5757 char channel, int lun, u_int tag, role_t role)
5758 {
5759 int targ = SCB_GET_TARGET(ahc, scb);
5760 char chan = SCB_GET_CHANNEL(ahc, scb);
5761 int slun = SCB_GET_LUN(scb);
5762 int match;
5763
5764 match = ((chan == channel) || (channel == ALL_CHANNELS));
5765 if (match != 0)
5766 match = ((targ == target) || (target == CAM_TARGET_WILDCARD));
5767 if (match != 0)
5768 match = ((lun == slun) || (lun == CAM_LUN_WILDCARD));
5769 if (match != 0) {
5770 #ifdef AHC_TARGET_MODE
5771 int group;
5772
5773 group = XPT_FC_GROUP(scb->io_ctx->ccb_h.func_code);
5774 if (role == ROLE_INITIATOR) {
5775 match = (group != XPT_FC_GROUP_TMODE)
5776 && ((tag == scb->hscb->tag)
5777 || (tag == SCB_LIST_NULL));
5778 } else if (role == ROLE_TARGET) {
5779 match = (group == XPT_FC_GROUP_TMODE)
5780 && ((tag == scb->io_ctx->csio.tag_id)
5781 || (tag == SCB_LIST_NULL));
5782 }
5783 #else /* !AHC_TARGET_MODE */
5784 match = ((tag == scb->hscb->tag) || (tag == SCB_LIST_NULL));
5785 #endif /* AHC_TARGET_MODE */
5786 }
5787
5788 return match;
5789 }
5790
5791 static void
5792 ahc_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
5793 {
5794 int target;
5795 char channel;
5796 int lun;
5797
5798 target = SCB_GET_TARGET(ahc, scb);
5799 lun = SCB_GET_LUN(scb);
5800 channel = SCB_GET_CHANNEL(ahc, scb);
5801
5802 ahc_search_qinfifo(ahc, target, channel, lun,
5803 /*tag*/SCB_LIST_NULL, ROLE_UNKNOWN,
5804 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
5805
5806 ahc_platform_freeze_devq(ahc, scb);
5807 }
5808
5809 void
5810 ahc_qinfifo_requeue_tail(struct ahc_softc *ahc, struct scb *scb)
5811 {
5812 struct scb *prev_scb;
5813
5814 prev_scb = NULL;
5815 if (ahc_qinfifo_count(ahc) != 0) {
5816 u_int prev_tag;
5817 uint8_t prev_pos;
5818
5819 prev_pos = ahc->qinfifonext - 1;
5820 prev_tag = ahc->qinfifo[prev_pos];
5821 prev_scb = ahc_lookup_scb(ahc, prev_tag);
5822 }
5823 ahc_qinfifo_requeue(ahc, prev_scb, scb);
5824 if ((ahc->features & AHC_QUEUE_REGS) != 0) {
5825 ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext);
5826 } else {
5827 ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext);
5828 }
5829 }
5830
5831 static void
5832 ahc_qinfifo_requeue(struct ahc_softc *ahc, struct scb *prev_scb,
5833 struct scb *scb)
5834 {
5835 if (prev_scb == NULL) {
5836 ahc_outb(ahc, NEXT_QUEUED_SCB, scb->hscb->tag);
5837 } else {
5838 prev_scb->hscb->next = scb->hscb->tag;
5839 ahc_sync_scb(ahc, prev_scb,
5840 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
5841 }
5842 ahc->qinfifo[ahc->qinfifonext++] = scb->hscb->tag;
5843 scb->hscb->next = ahc->next_queued_scb->hscb->tag;
5844 ahc_sync_scb(ahc, scb, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
5845 }
5846
5847 static int
5848 ahc_qinfifo_count(struct ahc_softc *ahc)
5849 {
5850 uint8_t qinpos;
5851 uint8_t diff;
5852
5853 if ((ahc->features & AHC_QUEUE_REGS) != 0) {
5854 qinpos = ahc_inb(ahc, SNSCB_QOFF);
5855 ahc_outb(ahc, SNSCB_QOFF, qinpos);
5856 } else
5857 qinpos = ahc_inb(ahc, QINPOS);
5858 diff = ahc->qinfifonext - qinpos;
5859 return (diff);
5860 }
5861
5862 int
5863 ahc_search_qinfifo(struct ahc_softc *ahc, int target, char channel,
5864 int lun, u_int tag, role_t role, uint32_t status,
5865 ahc_search_action action)
5866 {
5867 struct scb *scb;
5868 struct scb *prev_scb;
5869 uint8_t qinstart;
5870 uint8_t qinpos;
5871 uint8_t qintail;
5872 uint8_t next;
5873 uint8_t prev;
5874 uint8_t curscbptr;
5875 int found;
5876 int have_qregs;
5877
5878 qintail = ahc->qinfifonext;
5879 have_qregs = (ahc->features & AHC_QUEUE_REGS) != 0;
5880 if (have_qregs) {
5881 qinstart = ahc_inb(ahc, SNSCB_QOFF);
5882 ahc_outb(ahc, SNSCB_QOFF, qinstart);
5883 } else
5884 qinstart = ahc_inb(ahc, QINPOS);
5885 qinpos = qinstart;
5886 found = 0;
5887 prev_scb = NULL;
5888
5889 if (action == SEARCH_COMPLETE) {
5890 /*
5891 * Don't attempt to run any queued untagged transactions
5892 * until we are done with the abort process.
5893 */
5894 ahc_freeze_untagged_queues(ahc);
5895 }
5896
5897 /*
5898 * Start with an empty queue. Entries that are not chosen
5899 * for removal will be re-added to the queue as we go.
5900 */
5901 ahc->qinfifonext = qinpos;
5902 ahc_outb(ahc, NEXT_QUEUED_SCB, ahc->next_queued_scb->hscb->tag);
5903
5904 while (qinpos != qintail) {
5905 scb = ahc_lookup_scb(ahc, ahc->qinfifo[qinpos]);
5906 if (scb == NULL) {
5907 printk("qinpos = %d, SCB index = %d\n",
5908 qinpos, ahc->qinfifo[qinpos]);
5909 panic("Loop 1\n");
5910 }
5911
5912 if (ahc_match_scb(ahc, scb, target, channel, lun, tag, role)) {
5913 /*
5914 * We found an scb that needs to be acted on.
5915 */
5916 found++;
5917 switch (action) {
5918 case SEARCH_COMPLETE:
5919 {
5920 cam_status ostat;
5921 cam_status cstat;
5922
5923 ostat = ahc_get_transaction_status(scb);
5924 if (ostat == CAM_REQ_INPROG)
5925 ahc_set_transaction_status(scb, status);
5926 cstat = ahc_get_transaction_status(scb);
5927 if (cstat != CAM_REQ_CMP)
5928 ahc_freeze_scb(scb);
5929 if ((scb->flags & SCB_ACTIVE) == 0)
5930 printk("Inactive SCB in qinfifo\n");
5931 ahc_done(ahc, scb);
5932
5933 /* FALLTHROUGH */
5934 }
5935 case SEARCH_REMOVE:
5936 break;
5937 case SEARCH_COUNT:
5938 ahc_qinfifo_requeue(ahc, prev_scb, scb);
5939 prev_scb = scb;
5940 break;
5941 }
5942 } else {
5943 ahc_qinfifo_requeue(ahc, prev_scb, scb);
5944 prev_scb = scb;
5945 }
5946 qinpos++;
5947 }
5948
5949 if ((ahc->features & AHC_QUEUE_REGS) != 0) {
5950 ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext);
5951 } else {
5952 ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext);
5953 }
5954
5955 if (action != SEARCH_COUNT
5956 && (found != 0)
5957 && (qinstart != ahc->qinfifonext)) {
5958 /*
5959 * The sequencer may be in the process of dmaing
5960 * down the SCB at the beginning of the queue.
5961 * This could be problematic if either the first,
5962 * or the second SCB is removed from the queue
5963 * (the first SCB includes a pointer to the "next"
5964 * SCB to dma). If we have removed any entries, swap
5965 * the first element in the queue with the next HSCB
5966 * so the sequencer will notice that NEXT_QUEUED_SCB
5967 * has changed during its dma attempt and will retry
5968 * the DMA.
5969 */
5970 scb = ahc_lookup_scb(ahc, ahc->qinfifo[qinstart]);
5971
5972 if (scb == NULL) {
5973 printk("found = %d, qinstart = %d, qinfifionext = %d\n",
5974 found, qinstart, ahc->qinfifonext);
5975 panic("First/Second Qinfifo fixup\n");
5976 }
5977 /*
5978 * ahc_swap_with_next_hscb forces our next pointer to
5979 * point to the reserved SCB for future commands. Save
5980 * and restore our original next pointer to maintain
5981 * queue integrity.
5982 */
5983 next = scb->hscb->next;
5984 ahc->scb_data->scbindex[scb->hscb->tag] = NULL;
5985 ahc_swap_with_next_hscb(ahc, scb);
5986 scb->hscb->next = next;
5987 ahc->qinfifo[qinstart] = scb->hscb->tag;
5988
5989 /* Tell the card about the new head of the qinfifo. */
5990 ahc_outb(ahc, NEXT_QUEUED_SCB, scb->hscb->tag);
5991
5992 /* Fixup the tail "next" pointer. */
5993 qintail = ahc->qinfifonext - 1;
5994 scb = ahc_lookup_scb(ahc, ahc->qinfifo[qintail]);
5995 scb->hscb->next = ahc->next_queued_scb->hscb->tag;
5996 }
5997
5998 /*
5999 * Search waiting for selection list.
6000 */
6001 curscbptr = ahc_inb(ahc, SCBPTR);
6002 next = ahc_inb(ahc, WAITING_SCBH); /* Start at head of list. */
6003 prev = SCB_LIST_NULL;
6004
6005 while (next != SCB_LIST_NULL) {
6006 uint8_t scb_index;
6007
6008 ahc_outb(ahc, SCBPTR, next);
6009 scb_index = ahc_inb(ahc, SCB_TAG);
6010 if (scb_index >= ahc->scb_data->numscbs) {
6011 printk("Waiting List inconsistency. "
6012 "SCB index == %d, yet numscbs == %d.",
6013 scb_index, ahc->scb_data->numscbs);
6014 ahc_dump_card_state(ahc);
6015 panic("for safety");
6016 }
6017 scb = ahc_lookup_scb(ahc, scb_index);
6018 if (scb == NULL) {
6019 printk("scb_index = %d, next = %d\n",
6020 scb_index, next);
6021 panic("Waiting List traversal\n");
6022 }
6023 if (ahc_match_scb(ahc, scb, target, channel,
6024 lun, SCB_LIST_NULL, role)) {
6025 /*
6026 * We found an scb that needs to be acted on.
6027 */
6028 found++;
6029 switch (action) {
6030 case SEARCH_COMPLETE:
6031 {
6032 cam_status ostat;
6033 cam_status cstat;
6034
6035 ostat = ahc_get_transaction_status(scb);
6036 if (ostat == CAM_REQ_INPROG)
6037 ahc_set_transaction_status(scb,
6038 status);
6039 cstat = ahc_get_transaction_status(scb);
6040 if (cstat != CAM_REQ_CMP)
6041 ahc_freeze_scb(scb);
6042 if ((scb->flags & SCB_ACTIVE) == 0)
6043 printk("Inactive SCB in Waiting List\n");
6044 ahc_done(ahc, scb);
6045 /* FALLTHROUGH */
6046 }
6047 case SEARCH_REMOVE:
6048 next = ahc_rem_wscb(ahc, next, prev);
6049 break;
6050 case SEARCH_COUNT:
6051 prev = next;
6052 next = ahc_inb(ahc, SCB_NEXT);
6053 break;
6054 }
6055 } else {
6056
6057 prev = next;
6058 next = ahc_inb(ahc, SCB_NEXT);
6059 }
6060 }
6061 ahc_outb(ahc, SCBPTR, curscbptr);
6062
6063 found += ahc_search_untagged_queues(ahc, /*ahc_io_ctx_t*/NULL, target,
6064 channel, lun, status, action);
6065
6066 if (action == SEARCH_COMPLETE)
6067 ahc_release_untagged_queues(ahc);
6068 return (found);
6069 }
6070
6071 int
6072 ahc_search_untagged_queues(struct ahc_softc *ahc, ahc_io_ctx_t ctx,
6073 int target, char channel, int lun, uint32_t status,
6074 ahc_search_action action)
6075 {
6076 struct scb *scb;
6077 int maxtarget;
6078 int found;
6079 int i;
6080
6081 if (action == SEARCH_COMPLETE) {
6082 /*
6083 * Don't attempt to run any queued untagged transactions
6084 * until we are done with the abort process.
6085 */
6086 ahc_freeze_untagged_queues(ahc);
6087 }
6088
6089 found = 0;
6090 i = 0;
6091 if ((ahc->flags & AHC_SCB_BTT) == 0) {
6092
6093 maxtarget = 16;
6094 if (target != CAM_TARGET_WILDCARD) {
6095
6096 i = target;
6097 if (channel == 'B')
6098 i += 8;
6099 maxtarget = i + 1;
6100 }
6101 } else {
6102 maxtarget = 0;
6103 }
6104
6105 for (; i < maxtarget; i++) {
6106 struct scb_tailq *untagged_q;
6107 struct scb *next_scb;
6108
6109 untagged_q = &(ahc->untagged_queues[i]);
6110 next_scb = TAILQ_FIRST(untagged_q);
6111 while (next_scb != NULL) {
6112
6113 scb = next_scb;
6114 next_scb = TAILQ_NEXT(scb, links.tqe);
6115
6116 /*
6117 * The head of the list may be the currently
6118 * active untagged command for a device.
6119 * We're only searching for commands that
6120 * have not been started. A transaction
6121 * marked active but still in the qinfifo
6122 * is removed by the qinfifo scanning code
6123 * above.
6124 */
6125 if ((scb->flags & SCB_ACTIVE) != 0)
6126 continue;
6127
6128 if (ahc_match_scb(ahc, scb, target, channel, lun,
6129 SCB_LIST_NULL, ROLE_INITIATOR) == 0
6130 || (ctx != NULL && ctx != scb->io_ctx))
6131 continue;
6132
6133 /*
6134 * We found an scb that needs to be acted on.
6135 */
6136 found++;
6137 switch (action) {
6138 case SEARCH_COMPLETE:
6139 {
6140 cam_status ostat;
6141 cam_status cstat;
6142
6143 ostat = ahc_get_transaction_status(scb);
6144 if (ostat == CAM_REQ_INPROG)
6145 ahc_set_transaction_status(scb, status);
6146 cstat = ahc_get_transaction_status(scb);
6147 if (cstat != CAM_REQ_CMP)
6148 ahc_freeze_scb(scb);
6149 if ((scb->flags & SCB_ACTIVE) == 0)
6150 printk("Inactive SCB in untaggedQ\n");
6151 ahc_done(ahc, scb);
6152 break;
6153 }
6154 case SEARCH_REMOVE:
6155 scb->flags &= ~SCB_UNTAGGEDQ;
6156 TAILQ_REMOVE(untagged_q, scb, links.tqe);
6157 break;
6158 case SEARCH_COUNT:
6159 break;
6160 }
6161 }
6162 }
6163
6164 if (action == SEARCH_COMPLETE)
6165 ahc_release_untagged_queues(ahc);
6166 return (found);
6167 }
6168
6169 int
6170 ahc_search_disc_list(struct ahc_softc *ahc, int target, char channel,
6171 int lun, u_int tag, int stop_on_first, int remove,
6172 int save_state)
6173 {
6174 struct scb *scbp;
6175 u_int next;
6176 u_int prev;
6177 u_int count;
6178 u_int active_scb;
6179
6180 count = 0;
6181 next = ahc_inb(ahc, DISCONNECTED_SCBH);
6182 prev = SCB_LIST_NULL;
6183
6184 if (save_state) {
6185 /* restore this when we're done */
6186 active_scb = ahc_inb(ahc, SCBPTR);
6187 } else
6188 /* Silence compiler */
6189 active_scb = SCB_LIST_NULL;
6190
6191 while (next != SCB_LIST_NULL) {
6192 u_int scb_index;
6193
6194 ahc_outb(ahc, SCBPTR, next);
6195 scb_index = ahc_inb(ahc, SCB_TAG);
6196 if (scb_index >= ahc->scb_data->numscbs) {
6197 printk("Disconnected List inconsistency. "
6198 "SCB index == %d, yet numscbs == %d.",
6199 scb_index, ahc->scb_data->numscbs);
6200 ahc_dump_card_state(ahc);
6201 panic("for safety");
6202 }
6203
6204 if (next == prev) {
6205 panic("Disconnected List Loop. "
6206 "cur SCBPTR == %x, prev SCBPTR == %x.",
6207 next, prev);
6208 }
6209 scbp = ahc_lookup_scb(ahc, scb_index);
6210 if (ahc_match_scb(ahc, scbp, target, channel, lun,
6211 tag, ROLE_INITIATOR)) {
6212 count++;
6213 if (remove) {
6214 next =
6215 ahc_rem_scb_from_disc_list(ahc, prev, next);
6216 } else {
6217 prev = next;
6218 next = ahc_inb(ahc, SCB_NEXT);
6219 }
6220 if (stop_on_first)
6221 break;
6222 } else {
6223 prev = next;
6224 next = ahc_inb(ahc, SCB_NEXT);
6225 }
6226 }
6227 if (save_state)
6228 ahc_outb(ahc, SCBPTR, active_scb);
6229 return (count);
6230 }
6231
6232 /*
6233 * Remove an SCB from the on chip list of disconnected transactions.
6234 * This is empty/unused if we are not performing SCB paging.
6235 */
6236 static u_int
6237 ahc_rem_scb_from_disc_list(struct ahc_softc *ahc, u_int prev, u_int scbptr)
6238 {
6239 u_int next;
6240
6241 ahc_outb(ahc, SCBPTR, scbptr);
6242 next = ahc_inb(ahc, SCB_NEXT);
6243
6244 ahc_outb(ahc, SCB_CONTROL, 0);
6245
6246 ahc_add_curscb_to_free_list(ahc);
6247
6248 if (prev != SCB_LIST_NULL) {
6249 ahc_outb(ahc, SCBPTR, prev);
6250 ahc_outb(ahc, SCB_NEXT, next);
6251 } else
6252 ahc_outb(ahc, DISCONNECTED_SCBH, next);
6253
6254 return (next);
6255 }
6256
6257 /*
6258 * Add the SCB as selected by SCBPTR onto the on chip list of
6259 * free hardware SCBs. This list is empty/unused if we are not
6260 * performing SCB paging.
6261 */
6262 static void
6263 ahc_add_curscb_to_free_list(struct ahc_softc *ahc)
6264 {
6265 /*
6266 * Invalidate the tag so that our abort
6267 * routines don't think it's active.
6268 */
6269 ahc_outb(ahc, SCB_TAG, SCB_LIST_NULL);
6270
6271 if ((ahc->flags & AHC_PAGESCBS) != 0) {
6272 ahc_outb(ahc, SCB_NEXT, ahc_inb(ahc, FREE_SCBH));
6273 ahc_outb(ahc, FREE_SCBH, ahc_inb(ahc, SCBPTR));
6274 }
6275 }
6276
6277 /*
6278 * Manipulate the waiting for selection list and return the
6279 * scb that follows the one that we remove.
6280 */
6281 static u_int
6282 ahc_rem_wscb(struct ahc_softc *ahc, u_int scbpos, u_int prev)
6283 {
6284 u_int curscb, next;
6285
6286 /*
6287 * Select the SCB we want to abort and
6288 * pull the next pointer out of it.
6289 */
6290 curscb = ahc_inb(ahc, SCBPTR);
6291 ahc_outb(ahc, SCBPTR, scbpos);
6292 next = ahc_inb(ahc, SCB_NEXT);
6293
6294 /* Clear the necessary fields */
6295 ahc_outb(ahc, SCB_CONTROL, 0);
6296
6297 ahc_add_curscb_to_free_list(ahc);
6298
6299 /* update the waiting list */
6300 if (prev == SCB_LIST_NULL) {
6301 /* First in the list */
6302 ahc_outb(ahc, WAITING_SCBH, next);
6303
6304 /*
6305 * Ensure we aren't attempting to perform
6306 * selection for this entry.
6307 */
6308 ahc_outb(ahc, SCSISEQ, (ahc_inb(ahc, SCSISEQ) & ~ENSELO));
6309 } else {
6310 /*
6311 * Select the scb that pointed to us
6312 * and update its next pointer.
6313 */
6314 ahc_outb(ahc, SCBPTR, prev);
6315 ahc_outb(ahc, SCB_NEXT, next);
6316 }
6317
6318 /*
6319 * Point us back at the original scb position.
6320 */
6321 ahc_outb(ahc, SCBPTR, curscb);
6322 return next;
6323 }
6324
6325 /******************************** Error Handling ******************************/
6326 /*
6327 * Abort all SCBs that match the given description (target/channel/lun/tag),
6328 * setting their status to the passed in status if the status has not already
6329 * been modified from CAM_REQ_INPROG. This routine assumes that the sequencer
6330 * is paused before it is called.
6331 */
6332 static int
6333 ahc_abort_scbs(struct ahc_softc *ahc, int target, char channel,
6334 int lun, u_int tag, role_t role, uint32_t status)
6335 {
6336 struct scb *scbp;
6337 struct scb *scbp_next;
6338 u_int active_scb;
6339 int i, j;
6340 int maxtarget;
6341 int minlun;
6342 int maxlun;
6343
6344 int found;
6345
6346 /*
6347 * Don't attempt to run any queued untagged transactions
6348 * until we are done with the abort process.
6349 */
6350 ahc_freeze_untagged_queues(ahc);
6351
6352 /* restore this when we're done */
6353 active_scb = ahc_inb(ahc, SCBPTR);
6354
6355 found = ahc_search_qinfifo(ahc, target, channel, lun, SCB_LIST_NULL,
6356 role, CAM_REQUEUE_REQ, SEARCH_COMPLETE);
6357
6358 /*
6359 * Clean out the busy target table for any untagged commands.
6360 */
6361 i = 0;
6362 maxtarget = 16;
6363 if (target != CAM_TARGET_WILDCARD) {
6364 i = target;
6365 if (channel == 'B')
6366 i += 8;
6367 maxtarget = i + 1;
6368 }
6369
6370 if (lun == CAM_LUN_WILDCARD) {
6371
6372 /*
6373 * Unless we are using an SCB based
6374 * busy targets table, there is only
6375 * one table entry for all luns of
6376 * a target.
6377 */
6378 minlun = 0;
6379 maxlun = 1;
6380 if ((ahc->flags & AHC_SCB_BTT) != 0)
6381 maxlun = AHC_NUM_LUNS;
6382 } else {
6383 minlun = lun;
6384 maxlun = lun + 1;
6385 }
6386
6387 if (role != ROLE_TARGET) {
6388 for (;i < maxtarget; i++) {
6389 for (j = minlun;j < maxlun; j++) {
6390 u_int scbid;
6391 u_int tcl;
6392
6393 tcl = BUILD_TCL(i << 4, j);
6394 scbid = ahc_index_busy_tcl(ahc, tcl);
6395 scbp = ahc_lookup_scb(ahc, scbid);
6396 if (scbp == NULL
6397 || ahc_match_scb(ahc, scbp, target, channel,
6398 lun, tag, role) == 0)
6399 continue;
6400 ahc_unbusy_tcl(ahc, BUILD_TCL(i << 4, j));
6401 }
6402 }
6403
6404 /*
6405 * Go through the disconnected list and remove any entries we
6406 * have queued for completion, 0'ing their control byte too.
6407 * We save the active SCB and restore it ourselves, so there
6408 * is no reason for this search to restore it too.
6409 */
6410 ahc_search_disc_list(ahc, target, channel, lun, tag,
6411 /*stop_on_first*/FALSE, /*remove*/TRUE,
6412 /*save_state*/FALSE);
6413 }
6414
6415 /*
6416 * Go through the hardware SCB array looking for commands that
6417 * were active but not on any list. In some cases, these remnants
6418 * might not still have mappings in the scbindex array (e.g. unexpected
6419 * bus free with the same scb queued for an abort). Don't hold this
6420 * against them.
6421 */
6422 for (i = 0; i < ahc->scb_data->maxhscbs; i++) {
6423 u_int scbid;
6424
6425 ahc_outb(ahc, SCBPTR, i);
6426 scbid = ahc_inb(ahc, SCB_TAG);
6427 scbp = ahc_lookup_scb(ahc, scbid);
6428 if ((scbp == NULL && scbid != SCB_LIST_NULL)
6429 || (scbp != NULL
6430 && ahc_match_scb(ahc, scbp, target, channel, lun, tag, role)))
6431 ahc_add_curscb_to_free_list(ahc);
6432 }
6433
6434 /*
6435 * Go through the pending CCB list and look for
6436 * commands for this target that are still active.
6437 * These are other tagged commands that were
6438 * disconnected when the reset occurred.
6439 */
6440 scbp_next = LIST_FIRST(&ahc->pending_scbs);
6441 while (scbp_next != NULL) {
6442 scbp = scbp_next;
6443 scbp_next = LIST_NEXT(scbp, pending_links);
6444 if (ahc_match_scb(ahc, scbp, target, channel, lun, tag, role)) {
6445 cam_status ostat;
6446
6447 ostat = ahc_get_transaction_status(scbp);
6448 if (ostat == CAM_REQ_INPROG)
6449 ahc_set_transaction_status(scbp, status);
6450 if (ahc_get_transaction_status(scbp) != CAM_REQ_CMP)
6451 ahc_freeze_scb(scbp);
6452 if ((scbp->flags & SCB_ACTIVE) == 0)
6453 printk("Inactive SCB on pending list\n");
6454 ahc_done(ahc, scbp);
6455 found++;
6456 }
6457 }
6458 ahc_outb(ahc, SCBPTR, active_scb);
6459 ahc_platform_abort_scbs(ahc, target, channel, lun, tag, role, status);
6460 ahc_release_untagged_queues(ahc);
6461 return found;
6462 }
6463
6464 static void
6465 ahc_reset_current_bus(struct ahc_softc *ahc)
6466 {
6467 uint8_t scsiseq;
6468
6469 ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENSCSIRST);
6470 scsiseq = ahc_inb(ahc, SCSISEQ);
6471 ahc_outb(ahc, SCSISEQ, scsiseq | SCSIRSTO);
6472 ahc_flush_device_writes(ahc);
6473 ahc_delay(AHC_BUSRESET_DELAY);
6474 /* Turn off the bus reset */
6475 ahc_outb(ahc, SCSISEQ, scsiseq & ~SCSIRSTO);
6476
6477 ahc_clear_intstat(ahc);
6478
6479 /* Re-enable reset interrupts */
6480 ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) | ENSCSIRST);
6481 }
6482
6483 int
6484 ahc_reset_channel(struct ahc_softc *ahc, char channel, int initiate_reset)
6485 {
6486 struct ahc_devinfo devinfo;
6487 u_int initiator, target, max_scsiid;
6488 u_int sblkctl;
6489 u_int scsiseq;
6490 u_int simode1;
6491 int found;
6492 int restart_needed;
6493 char cur_channel;
6494
6495 ahc->pending_device = NULL;
6496
6497 ahc_compile_devinfo(&devinfo,
6498 CAM_TARGET_WILDCARD,
6499 CAM_TARGET_WILDCARD,
6500 CAM_LUN_WILDCARD,
6501 channel, ROLE_UNKNOWN);
6502 ahc_pause(ahc);
6503
6504 /* Make sure the sequencer is in a safe location. */
6505 ahc_clear_critical_section(ahc);
6506
6507 /*
6508 * Run our command complete fifos to ensure that we perform
6509 * completion processing on any commands that 'completed'
6510 * before the reset occurred.
6511 */
6512 ahc_run_qoutfifo(ahc);
6513 #ifdef AHC_TARGET_MODE
6514 /*
6515 * XXX - In Twin mode, the tqinfifo may have commands
6516 * for an unaffected channel in it. However, if
6517 * we have run out of ATIO resources to drain that
6518 * queue, we may not get them all out here. Further,
6519 * the blocked transactions for the reset channel
6520 * should just be killed off, irrespecitve of whether
6521 * we are blocked on ATIO resources. Write a routine
6522 * to compact the tqinfifo appropriately.
6523 */
6524 if ((ahc->flags & AHC_TARGETROLE) != 0) {
6525 ahc_run_tqinfifo(ahc, /*paused*/TRUE);
6526 }
6527 #endif
6528
6529 /*
6530 * Reset the bus if we are initiating this reset
6531 */
6532 sblkctl = ahc_inb(ahc, SBLKCTL);
6533 cur_channel = 'A';
6534 if ((ahc->features & AHC_TWIN) != 0
6535 && ((sblkctl & SELBUSB) != 0))
6536 cur_channel = 'B';
6537 scsiseq = ahc_inb(ahc, SCSISEQ_TEMPLATE);
6538 if (cur_channel != channel) {
6539 /* Case 1: Command for another bus is active
6540 * Stealthily reset the other bus without
6541 * upsetting the current bus.
6542 */
6543 ahc_outb(ahc, SBLKCTL, sblkctl ^ SELBUSB);
6544 simode1 = ahc_inb(ahc, SIMODE1) & ~(ENBUSFREE|ENSCSIRST);
6545 #ifdef AHC_TARGET_MODE
6546 /*
6547 * Bus resets clear ENSELI, so we cannot
6548 * defer re-enabling bus reset interrupts
6549 * if we are in target mode.
6550 */
6551 if ((ahc->flags & AHC_TARGETROLE) != 0)
6552 simode1 |= ENSCSIRST;
6553 #endif
6554 ahc_outb(ahc, SIMODE1, simode1);
6555 if (initiate_reset)
6556 ahc_reset_current_bus(ahc);
6557 ahc_clear_intstat(ahc);
6558 ahc_outb(ahc, SCSISEQ, scsiseq & (ENSELI|ENRSELI|ENAUTOATNP));
6559 ahc_outb(ahc, SBLKCTL, sblkctl);
6560 restart_needed = FALSE;
6561 } else {
6562 /* Case 2: A command from this bus is active or we're idle */
6563 simode1 = ahc_inb(ahc, SIMODE1) & ~(ENBUSFREE|ENSCSIRST);
6564 #ifdef AHC_TARGET_MODE
6565 /*
6566 * Bus resets clear ENSELI, so we cannot
6567 * defer re-enabling bus reset interrupts
6568 * if we are in target mode.
6569 */
6570 if ((ahc->flags & AHC_TARGETROLE) != 0)
6571 simode1 |= ENSCSIRST;
6572 #endif
6573 ahc_outb(ahc, SIMODE1, simode1);
6574 if (initiate_reset)
6575 ahc_reset_current_bus(ahc);
6576 ahc_clear_intstat(ahc);
6577 ahc_outb(ahc, SCSISEQ, scsiseq & (ENSELI|ENRSELI|ENAUTOATNP));
6578 restart_needed = TRUE;
6579 }
6580
6581 /*
6582 * Clean up all the state information for the
6583 * pending transactions on this bus.
6584 */
6585 found = ahc_abort_scbs(ahc, CAM_TARGET_WILDCARD, channel,
6586 CAM_LUN_WILDCARD, SCB_LIST_NULL,
6587 ROLE_UNKNOWN, CAM_SCSI_BUS_RESET);
6588
6589 max_scsiid = (ahc->features & AHC_WIDE) ? 15 : 7;
6590
6591 #ifdef AHC_TARGET_MODE
6592 /*
6593 * Send an immediate notify ccb to all target more peripheral
6594 * drivers affected by this action.
6595 */
6596 for (target = 0; target <= max_scsiid; target++) {
6597 struct ahc_tmode_tstate* tstate;
6598 u_int lun;
6599
6600 tstate = ahc->enabled_targets[target];
6601 if (tstate == NULL)
6602 continue;
6603 for (lun = 0; lun < AHC_NUM_LUNS; lun++) {
6604 struct ahc_tmode_lstate* lstate;
6605
6606 lstate = tstate->enabled_luns[lun];
6607 if (lstate == NULL)
6608 continue;
6609
6610 ahc_queue_lstate_event(ahc, lstate, CAM_TARGET_WILDCARD,
6611 EVENT_TYPE_BUS_RESET, /*arg*/0);
6612 ahc_send_lstate_events(ahc, lstate);
6613 }
6614 }
6615 #endif
6616 /* Notify the XPT that a bus reset occurred */
6617 ahc_send_async(ahc, devinfo.channel, CAM_TARGET_WILDCARD,
6618 CAM_LUN_WILDCARD, AC_BUS_RESET);
6619
6620 /*
6621 * Revert to async/narrow transfers until we renegotiate.
6622 */
6623 for (target = 0; target <= max_scsiid; target++) {
6624
6625 if (ahc->enabled_targets[target] == NULL)
6626 continue;
6627 for (initiator = 0; initiator <= max_scsiid; initiator++) {
6628 struct ahc_devinfo devinfo;
6629
6630 ahc_compile_devinfo(&devinfo, target, initiator,
6631 CAM_LUN_WILDCARD,
6632 channel, ROLE_UNKNOWN);
6633 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
6634 AHC_TRANS_CUR, /*paused*/TRUE);
6635 ahc_set_syncrate(ahc, &devinfo, /*syncrate*/NULL,
6636 /*period*/0, /*offset*/0,
6637 /*ppr_options*/0, AHC_TRANS_CUR,
6638 /*paused*/TRUE);
6639 }
6640 }
6641
6642 if (restart_needed)
6643 ahc_restart(ahc);
6644 else
6645 ahc_unpause(ahc);
6646 return found;
6647 }
6648
6649
6650 /***************************** Residual Processing ****************************/
6651 /*
6652 * Calculate the residual for a just completed SCB.
6653 */
6654 static void
6655 ahc_calc_residual(struct ahc_softc *ahc, struct scb *scb)
6656 {
6657 struct hardware_scb *hscb;
6658 struct status_pkt *spkt;
6659 uint32_t sgptr;
6660 uint32_t resid_sgptr;
6661 uint32_t resid;
6662
6663 /*
6664 * 5 cases.
6665 * 1) No residual.
6666 * SG_RESID_VALID clear in sgptr.
6667 * 2) Transferless command
6668 * 3) Never performed any transfers.
6669 * sgptr has SG_FULL_RESID set.
6670 * 4) No residual but target did not
6671 * save data pointers after the
6672 * last transfer, so sgptr was
6673 * never updated.
6674 * 5) We have a partial residual.
6675 * Use residual_sgptr to determine
6676 * where we are.
6677 */
6678
6679 hscb = scb->hscb;
6680 sgptr = ahc_le32toh(hscb->sgptr);
6681 if ((sgptr & SG_RESID_VALID) == 0)
6682 /* Case 1 */
6683 return;
6684 sgptr &= ~SG_RESID_VALID;
6685
6686 if ((sgptr & SG_LIST_NULL) != 0)
6687 /* Case 2 */
6688 return;
6689
6690 spkt = &hscb->shared_data.status;
6691 resid_sgptr = ahc_le32toh(spkt->residual_sg_ptr);
6692 if ((sgptr & SG_FULL_RESID) != 0) {
6693 /* Case 3 */
6694 resid = ahc_get_transfer_length(scb);
6695 } else if ((resid_sgptr & SG_LIST_NULL) != 0) {
6696 /* Case 4 */
6697 return;
6698 } else if ((resid_sgptr & ~SG_PTR_MASK) != 0) {
6699 panic("Bogus resid sgptr value 0x%x\n", resid_sgptr);
6700 } else {
6701 struct ahc_dma_seg *sg;
6702
6703 /*
6704 * Remainder of the SG where the transfer
6705 * stopped.
6706 */
6707 resid = ahc_le32toh(spkt->residual_datacnt) & AHC_SG_LEN_MASK;
6708 sg = ahc_sg_bus_to_virt(scb, resid_sgptr & SG_PTR_MASK);
6709
6710 /* The residual sg_ptr always points to the next sg */
6711 sg--;
6712
6713 /*
6714 * Add up the contents of all residual
6715 * SG segments that are after the SG where
6716 * the transfer stopped.
6717 */
6718 while ((ahc_le32toh(sg->len) & AHC_DMA_LAST_SEG) == 0) {
6719 sg++;
6720 resid += ahc_le32toh(sg->len) & AHC_SG_LEN_MASK;
6721 }
6722 }
6723 if ((scb->flags & SCB_SENSE) == 0)
6724 ahc_set_residual(scb, resid);
6725 else
6726 ahc_set_sense_residual(scb, resid);
6727
6728 #ifdef AHC_DEBUG
6729 if ((ahc_debug & AHC_SHOW_MISC) != 0) {
6730 ahc_print_path(ahc, scb);
6731 printk("Handled %sResidual of %d bytes\n",
6732 (scb->flags & SCB_SENSE) ? "Sense " : "", resid);
6733 }
6734 #endif
6735 }
6736
6737 /******************************* Target Mode **********************************/
6738 #ifdef AHC_TARGET_MODE
6739 /*
6740 * Add a target mode event to this lun's queue
6741 */
6742 static void
6743 ahc_queue_lstate_event(struct ahc_softc *ahc, struct ahc_tmode_lstate *lstate,
6744 u_int initiator_id, u_int event_type, u_int event_arg)
6745 {
6746 struct ahc_tmode_event *event;
6747 int pending;
6748
6749 xpt_freeze_devq(lstate->path, /*count*/1);
6750 if (lstate->event_w_idx >= lstate->event_r_idx)
6751 pending = lstate->event_w_idx - lstate->event_r_idx;
6752 else
6753 pending = AHC_TMODE_EVENT_BUFFER_SIZE + 1
6754 - (lstate->event_r_idx - lstate->event_w_idx);
6755
6756 if (event_type == EVENT_TYPE_BUS_RESET
6757 || event_type == MSG_BUS_DEV_RESET) {
6758 /*
6759 * Any earlier events are irrelevant, so reset our buffer.
6760 * This has the effect of allowing us to deal with reset
6761 * floods (an external device holding down the reset line)
6762 * without losing the event that is really interesting.
6763 */
6764 lstate->event_r_idx = 0;
6765 lstate->event_w_idx = 0;
6766 xpt_release_devq(lstate->path, pending, /*runqueue*/FALSE);
6767 }
6768
6769 if (pending == AHC_TMODE_EVENT_BUFFER_SIZE) {
6770 xpt_print_path(lstate->path);
6771 printk("immediate event %x:%x lost\n",
6772 lstate->event_buffer[lstate->event_r_idx].event_type,
6773 lstate->event_buffer[lstate->event_r_idx].event_arg);
6774 lstate->event_r_idx++;
6775 if (lstate->event_r_idx == AHC_TMODE_EVENT_BUFFER_SIZE)
6776 lstate->event_r_idx = 0;
6777 xpt_release_devq(lstate->path, /*count*/1, /*runqueue*/FALSE);
6778 }
6779
6780 event = &lstate->event_buffer[lstate->event_w_idx];
6781 event->initiator_id = initiator_id;
6782 event->event_type = event_type;
6783 event->event_arg = event_arg;
6784 lstate->event_w_idx++;
6785 if (lstate->event_w_idx == AHC_TMODE_EVENT_BUFFER_SIZE)
6786 lstate->event_w_idx = 0;
6787 }
6788
6789 /*
6790 * Send any target mode events queued up waiting
6791 * for immediate notify resources.
6792 */
6793 void
6794 ahc_send_lstate_events(struct ahc_softc *ahc, struct ahc_tmode_lstate *lstate)
6795 {
6796 struct ccb_hdr *ccbh;
6797 struct ccb_immed_notify *inot;
6798
6799 while (lstate->event_r_idx != lstate->event_w_idx
6800 && (ccbh = SLIST_FIRST(&lstate->immed_notifies)) != NULL) {
6801 struct ahc_tmode_event *event;
6802
6803 event = &lstate->event_buffer[lstate->event_r_idx];
6804 SLIST_REMOVE_HEAD(&lstate->immed_notifies, sim_links.sle);
6805 inot = (struct ccb_immed_notify *)ccbh;
6806 switch (event->event_type) {
6807 case EVENT_TYPE_BUS_RESET:
6808 ccbh->status = CAM_SCSI_BUS_RESET|CAM_DEV_QFRZN;
6809 break;
6810 default:
6811 ccbh->status = CAM_MESSAGE_RECV|CAM_DEV_QFRZN;
6812 inot->message_args[0] = event->event_type;
6813 inot->message_args[1] = event->event_arg;
6814 break;
6815 }
6816 inot->initiator_id = event->initiator_id;
6817 inot->sense_len = 0;
6818 xpt_done((union ccb *)inot);
6819 lstate->event_r_idx++;
6820 if (lstate->event_r_idx == AHC_TMODE_EVENT_BUFFER_SIZE)
6821 lstate->event_r_idx = 0;
6822 }
6823 }
6824 #endif
6825
6826 /******************** Sequencer Program Patching/Download *********************/
6827
6828 #ifdef AHC_DUMP_SEQ
6829 void
6830 ahc_dumpseq(struct ahc_softc* ahc)
6831 {
6832 int i;
6833
6834 ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE|LOADRAM);
6835 ahc_outb(ahc, SEQADDR0, 0);
6836 ahc_outb(ahc, SEQADDR1, 0);
6837 for (i = 0; i < ahc->instruction_ram_size; i++) {
6838 uint8_t ins_bytes[4];
6839
6840 ahc_insb(ahc, SEQRAM, ins_bytes, 4);
6841 printk("0x%08x\n", ins_bytes[0] << 24
6842 | ins_bytes[1] << 16
6843 | ins_bytes[2] << 8
6844 | ins_bytes[3]);
6845 }
6846 }
6847 #endif
6848
6849 static int
6850 ahc_loadseq(struct ahc_softc *ahc)
6851 {
6852 struct cs cs_table[num_critical_sections];
6853 u_int begin_set[num_critical_sections];
6854 u_int end_set[num_critical_sections];
6855 const struct patch *cur_patch;
6856 u_int cs_count;
6857 u_int cur_cs;
6858 u_int i;
6859 u_int skip_addr;
6860 u_int sg_prefetch_cnt;
6861 int downloaded;
6862 uint8_t download_consts[7];
6863
6864 /*
6865 * Start out with 0 critical sections
6866 * that apply to this firmware load.
6867 */
6868 cs_count = 0;
6869 cur_cs = 0;
6870 memset(begin_set, 0, sizeof(begin_set));
6871 memset(end_set, 0, sizeof(end_set));
6872
6873 /* Setup downloadable constant table */
6874 download_consts[QOUTFIFO_OFFSET] = 0;
6875 if (ahc->targetcmds != NULL)
6876 download_consts[QOUTFIFO_OFFSET] += 32;
6877 download_consts[QINFIFO_OFFSET] = download_consts[QOUTFIFO_OFFSET] + 1;
6878 download_consts[CACHESIZE_MASK] = ahc->pci_cachesize - 1;
6879 download_consts[INVERTED_CACHESIZE_MASK] = ~(ahc->pci_cachesize - 1);
6880 sg_prefetch_cnt = ahc->pci_cachesize;
6881 if (sg_prefetch_cnt < (2 * sizeof(struct ahc_dma_seg)))
6882 sg_prefetch_cnt = 2 * sizeof(struct ahc_dma_seg);
6883 download_consts[SG_PREFETCH_CNT] = sg_prefetch_cnt;
6884 download_consts[SG_PREFETCH_ALIGN_MASK] = ~(sg_prefetch_cnt - 1);
6885 download_consts[SG_PREFETCH_ADDR_MASK] = (sg_prefetch_cnt - 1);
6886
6887 cur_patch = patches;
6888 downloaded = 0;
6889 skip_addr = 0;
6890 ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE|LOADRAM);
6891 ahc_outb(ahc, SEQADDR0, 0);
6892 ahc_outb(ahc, SEQADDR1, 0);
6893
6894 for (i = 0; i < sizeof(seqprog)/4; i++) {
6895 if (ahc_check_patch(ahc, &cur_patch, i, &skip_addr) == 0) {
6896 /*
6897 * Don't download this instruction as it
6898 * is in a patch that was removed.
6899 */
6900 continue;
6901 }
6902
6903 if (downloaded == ahc->instruction_ram_size) {
6904 /*
6905 * We're about to exceed the instruction
6906 * storage capacity for this chip. Fail
6907 * the load.
6908 */
6909 printk("\n%s: Program too large for instruction memory "
6910 "size of %d!\n", ahc_name(ahc),
6911 ahc->instruction_ram_size);
6912 return (ENOMEM);
6913 }
6914
6915 /*
6916 * Move through the CS table until we find a CS
6917 * that might apply to this instruction.
6918 */
6919 for (; cur_cs < num_critical_sections; cur_cs++) {
6920 if (critical_sections[cur_cs].end <= i) {
6921 if (begin_set[cs_count] == TRUE
6922 && end_set[cs_count] == FALSE) {
6923 cs_table[cs_count].end = downloaded;
6924 end_set[cs_count] = TRUE;
6925 cs_count++;
6926 }
6927 continue;
6928 }
6929 if (critical_sections[cur_cs].begin <= i
6930 && begin_set[cs_count] == FALSE) {
6931 cs_table[cs_count].begin = downloaded;
6932 begin_set[cs_count] = TRUE;
6933 }
6934 break;
6935 }
6936 ahc_download_instr(ahc, i, download_consts);
6937 downloaded++;
6938 }
6939
6940 ahc->num_critical_sections = cs_count;
6941 if (cs_count != 0) {
6942
6943 cs_count *= sizeof(struct cs);
6944 ahc->critical_sections = kmalloc(cs_count, GFP_ATOMIC);
6945 if (ahc->critical_sections == NULL)
6946 panic("ahc_loadseq: Could not malloc");
6947 memcpy(ahc->critical_sections, cs_table, cs_count);
6948 }
6949 ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE);
6950
6951 if (bootverbose) {
6952 printk(" %d instructions downloaded\n", downloaded);
6953 printk("%s: Features 0x%x, Bugs 0x%x, Flags 0x%x\n",
6954 ahc_name(ahc), ahc->features, ahc->bugs, ahc->flags);
6955 }
6956 return (0);
6957 }
6958
6959 static int
6960 ahc_check_patch(struct ahc_softc *ahc, const struct patch **start_patch,
6961 u_int start_instr, u_int *skip_addr)
6962 {
6963 const struct patch *cur_patch;
6964 const struct patch *last_patch;
6965 u_int num_patches;
6966
6967 num_patches = ARRAY_SIZE(patches);
6968 last_patch = &patches[num_patches];
6969 cur_patch = *start_patch;
6970
6971 while (cur_patch < last_patch && start_instr == cur_patch->begin) {
6972
6973 if (cur_patch->patch_func(ahc) == 0) {
6974
6975 /* Start rejecting code */
6976 *skip_addr = start_instr + cur_patch->skip_instr;
6977 cur_patch += cur_patch->skip_patch;
6978 } else {
6979 /* Accepted this patch. Advance to the next
6980 * one and wait for our intruction pointer to
6981 * hit this point.
6982 */
6983 cur_patch++;
6984 }
6985 }
6986
6987 *start_patch = cur_patch;
6988 if (start_instr < *skip_addr)
6989 /* Still skipping */
6990 return (0);
6991
6992 return (1);
6993 }
6994
6995 static void
6996 ahc_download_instr(struct ahc_softc *ahc, u_int instrptr, uint8_t *dconsts)
6997 {
6998 union ins_formats instr;
6999 struct ins_format1 *fmt1_ins;
7000 struct ins_format3 *fmt3_ins;
7001 u_int opcode;
7002
7003 /*
7004 * The firmware is always compiled into a little endian format.
7005 */
7006 instr.integer = ahc_le32toh(*(uint32_t*)&seqprog[instrptr * 4]);
7007
7008 fmt1_ins = &instr.format1;
7009 fmt3_ins = NULL;
7010
7011 /* Pull the opcode */
7012 opcode = instr.format1.opcode;
7013 switch (opcode) {
7014 case AIC_OP_JMP:
7015 case AIC_OP_JC:
7016 case AIC_OP_JNC:
7017 case AIC_OP_CALL:
7018 case AIC_OP_JNE:
7019 case AIC_OP_JNZ:
7020 case AIC_OP_JE:
7021 case AIC_OP_JZ:
7022 {
7023 const struct patch *cur_patch;
7024 int address_offset;
7025 u_int address;
7026 u_int skip_addr;
7027 u_int i;
7028
7029 fmt3_ins = &instr.format3;
7030 address_offset = 0;
7031 address = fmt3_ins->address;
7032 cur_patch = patches;
7033 skip_addr = 0;
7034
7035 for (i = 0; i < address;) {
7036
7037 ahc_check_patch(ahc, &cur_patch, i, &skip_addr);
7038
7039 if (skip_addr > i) {
7040 int end_addr;
7041
7042 end_addr = min(address, skip_addr);
7043 address_offset += end_addr - i;
7044 i = skip_addr;
7045 } else {
7046 i++;
7047 }
7048 }
7049 address -= address_offset;
7050 fmt3_ins->address = address;
7051 /* FALLTHROUGH */
7052 }
7053 case AIC_OP_OR:
7054 case AIC_OP_AND:
7055 case AIC_OP_XOR:
7056 case AIC_OP_ADD:
7057 case AIC_OP_ADC:
7058 case AIC_OP_BMOV:
7059 if (fmt1_ins->parity != 0) {
7060 fmt1_ins->immediate = dconsts[fmt1_ins->immediate];
7061 }
7062 fmt1_ins->parity = 0;
7063 if ((ahc->features & AHC_CMD_CHAN) == 0
7064 && opcode == AIC_OP_BMOV) {
7065 /*
7066 * Block move was added at the same time
7067 * as the command channel. Verify that
7068 * this is only a move of a single element
7069 * and convert the BMOV to a MOV
7070 * (AND with an immediate of FF).
7071 */
7072 if (fmt1_ins->immediate != 1)
7073 panic("%s: BMOV not supported\n",
7074 ahc_name(ahc));
7075 fmt1_ins->opcode = AIC_OP_AND;
7076 fmt1_ins->immediate = 0xff;
7077 }
7078 /* FALLTHROUGH */
7079 case AIC_OP_ROL:
7080 if ((ahc->features & AHC_ULTRA2) != 0) {
7081 int i, count;
7082
7083 /* Calculate odd parity for the instruction */
7084 for (i = 0, count = 0; i < 31; i++) {
7085 uint32_t mask;
7086
7087 mask = 0x01 << i;
7088 if ((instr.integer & mask) != 0)
7089 count++;
7090 }
7091 if ((count & 0x01) == 0)
7092 instr.format1.parity = 1;
7093 } else {
7094 /* Compress the instruction for older sequencers */
7095 if (fmt3_ins != NULL) {
7096 instr.integer =
7097 fmt3_ins->immediate
7098 | (fmt3_ins->source << 8)
7099 | (fmt3_ins->address << 16)
7100 | (fmt3_ins->opcode << 25);
7101 } else {
7102 instr.integer =
7103 fmt1_ins->immediate
7104 | (fmt1_ins->source << 8)
7105 | (fmt1_ins->destination << 16)
7106 | (fmt1_ins->ret << 24)
7107 | (fmt1_ins->opcode << 25);
7108 }
7109 }
7110 /* The sequencer is a little endian cpu */
7111 instr.integer = ahc_htole32(instr.integer);
7112 ahc_outsb(ahc, SEQRAM, instr.bytes, 4);
7113 break;
7114 default:
7115 panic("Unknown opcode encountered in seq program");
7116 break;
7117 }
7118 }
7119
7120 int
7121 ahc_print_register(const ahc_reg_parse_entry_t *table, u_int num_entries,
7122 const char *name, u_int address, u_int value,
7123 u_int *cur_column, u_int wrap_point)
7124 {
7125 int printed;
7126 u_int printed_mask;
7127
7128 if (cur_column != NULL && *cur_column >= wrap_point) {
7129 printk("\n");
7130 *cur_column = 0;
7131 }
7132 printed = printk("%s[0x%x]", name, value);
7133 if (table == NULL) {
7134 printed += printk(" ");
7135 *cur_column += printed;
7136 return (printed);
7137 }
7138 printed_mask = 0;
7139 while (printed_mask != 0xFF) {
7140 int entry;
7141
7142 for (entry = 0; entry < num_entries; entry++) {
7143 if (((value & table[entry].mask)
7144 != table[entry].value)
7145 || ((printed_mask & table[entry].mask)
7146 == table[entry].mask))
7147 continue;
7148
7149 printed += printk("%s%s",
7150 printed_mask == 0 ? ":(" : "|",
7151 table[entry].name);
7152 printed_mask |= table[entry].mask;
7153
7154 break;
7155 }
7156 if (entry >= num_entries)
7157 break;
7158 }
7159 if (printed_mask != 0)
7160 printed += printk(") ");
7161 else
7162 printed += printk(" ");
7163 if (cur_column != NULL)
7164 *cur_column += printed;
7165 return (printed);
7166 }
7167
7168 void
7169 ahc_dump_card_state(struct ahc_softc *ahc)
7170 {
7171 struct scb *scb;
7172 struct scb_tailq *untagged_q;
7173 u_int cur_col;
7174 int paused;
7175 int target;
7176 int maxtarget;
7177 int i;
7178 uint8_t last_phase;
7179 uint8_t qinpos;
7180 uint8_t qintail;
7181 uint8_t qoutpos;
7182 uint8_t scb_index;
7183 uint8_t saved_scbptr;
7184
7185 if (ahc_is_paused(ahc)) {
7186 paused = 1;
7187 } else {
7188 paused = 0;
7189 ahc_pause(ahc);
7190 }
7191
7192 saved_scbptr = ahc_inb(ahc, SCBPTR);
7193 last_phase = ahc_inb(ahc, LASTPHASE);
7194 printk(">>>>>>>>>>>>>>>>>> Dump Card State Begins <<<<<<<<<<<<<<<<<\n"
7195 "%s: Dumping Card State %s, at SEQADDR 0x%x\n",
7196 ahc_name(ahc), ahc_lookup_phase_entry(last_phase)->phasemsg,
7197 ahc_inb(ahc, SEQADDR0) | (ahc_inb(ahc, SEQADDR1) << 8));
7198 if (paused)
7199 printk("Card was paused\n");
7200 printk("ACCUM = 0x%x, SINDEX = 0x%x, DINDEX = 0x%x, ARG_2 = 0x%x\n",
7201 ahc_inb(ahc, ACCUM), ahc_inb(ahc, SINDEX), ahc_inb(ahc, DINDEX),
7202 ahc_inb(ahc, ARG_2));
7203 printk("HCNT = 0x%x SCBPTR = 0x%x\n", ahc_inb(ahc, HCNT),
7204 ahc_inb(ahc, SCBPTR));
7205 cur_col = 0;
7206 if ((ahc->features & AHC_DT) != 0)
7207 ahc_scsiphase_print(ahc_inb(ahc, SCSIPHASE), &cur_col, 50);
7208 ahc_scsisigi_print(ahc_inb(ahc, SCSISIGI), &cur_col, 50);
7209 ahc_error_print(ahc_inb(ahc, ERROR), &cur_col, 50);
7210 ahc_scsibusl_print(ahc_inb(ahc, SCSIBUSL), &cur_col, 50);
7211 ahc_lastphase_print(ahc_inb(ahc, LASTPHASE), &cur_col, 50);
7212 ahc_scsiseq_print(ahc_inb(ahc, SCSISEQ), &cur_col, 50);
7213 ahc_sblkctl_print(ahc_inb(ahc, SBLKCTL), &cur_col, 50);
7214 ahc_scsirate_print(ahc_inb(ahc, SCSIRATE), &cur_col, 50);
7215 ahc_seqctl_print(ahc_inb(ahc, SEQCTL), &cur_col, 50);
7216 ahc_seq_flags_print(ahc_inb(ahc, SEQ_FLAGS), &cur_col, 50);
7217 ahc_sstat0_print(ahc_inb(ahc, SSTAT0), &cur_col, 50);
7218 ahc_sstat1_print(ahc_inb(ahc, SSTAT1), &cur_col, 50);
7219 ahc_sstat2_print(ahc_inb(ahc, SSTAT2), &cur_col, 50);
7220 ahc_sstat3_print(ahc_inb(ahc, SSTAT3), &cur_col, 50);
7221 ahc_simode0_print(ahc_inb(ahc, SIMODE0), &cur_col, 50);
7222 ahc_simode1_print(ahc_inb(ahc, SIMODE1), &cur_col, 50);
7223 ahc_sxfrctl0_print(ahc_inb(ahc, SXFRCTL0), &cur_col, 50);
7224 ahc_dfcntrl_print(ahc_inb(ahc, DFCNTRL), &cur_col, 50);
7225 ahc_dfstatus_print(ahc_inb(ahc, DFSTATUS), &cur_col, 50);
7226 if (cur_col != 0)
7227 printk("\n");
7228 printk("STACK:");
7229 for (i = 0; i < STACK_SIZE; i++)
7230 printk(" 0x%x", ahc_inb(ahc, STACK)|(ahc_inb(ahc, STACK) << 8));
7231 printk("\nSCB count = %d\n", ahc->scb_data->numscbs);
7232 printk("Kernel NEXTQSCB = %d\n", ahc->next_queued_scb->hscb->tag);
7233 printk("Card NEXTQSCB = %d\n", ahc_inb(ahc, NEXT_QUEUED_SCB));
7234 /* QINFIFO */
7235 printk("QINFIFO entries: ");
7236 if ((ahc->features & AHC_QUEUE_REGS) != 0) {
7237 qinpos = ahc_inb(ahc, SNSCB_QOFF);
7238 ahc_outb(ahc, SNSCB_QOFF, qinpos);
7239 } else
7240 qinpos = ahc_inb(ahc, QINPOS);
7241 qintail = ahc->qinfifonext;
7242 while (qinpos != qintail) {
7243 printk("%d ", ahc->qinfifo[qinpos]);
7244 qinpos++;
7245 }
7246 printk("\n");
7247
7248 printk("Waiting Queue entries: ");
7249 scb_index = ahc_inb(ahc, WAITING_SCBH);
7250 i = 0;
7251 while (scb_index != SCB_LIST_NULL && i++ < 256) {
7252 ahc_outb(ahc, SCBPTR, scb_index);
7253 printk("%d:%d ", scb_index, ahc_inb(ahc, SCB_TAG));
7254 scb_index = ahc_inb(ahc, SCB_NEXT);
7255 }
7256 printk("\n");
7257
7258 printk("Disconnected Queue entries: ");
7259 scb_index = ahc_inb(ahc, DISCONNECTED_SCBH);
7260 i = 0;
7261 while (scb_index != SCB_LIST_NULL && i++ < 256) {
7262 ahc_outb(ahc, SCBPTR, scb_index);
7263 printk("%d:%d ", scb_index, ahc_inb(ahc, SCB_TAG));
7264 scb_index = ahc_inb(ahc, SCB_NEXT);
7265 }
7266 printk("\n");
7267
7268 ahc_sync_qoutfifo(ahc, BUS_DMASYNC_POSTREAD);
7269 printk("QOUTFIFO entries: ");
7270 qoutpos = ahc->qoutfifonext;
7271 i = 0;
7272 while (ahc->qoutfifo[qoutpos] != SCB_LIST_NULL && i++ < 256) {
7273 printk("%d ", ahc->qoutfifo[qoutpos]);
7274 qoutpos++;
7275 }
7276 printk("\n");
7277
7278 printk("Sequencer Free SCB List: ");
7279 scb_index = ahc_inb(ahc, FREE_SCBH);
7280 i = 0;
7281 while (scb_index != SCB_LIST_NULL && i++ < 256) {
7282 ahc_outb(ahc, SCBPTR, scb_index);
7283 printk("%d ", scb_index);
7284 scb_index = ahc_inb(ahc, SCB_NEXT);
7285 }
7286 printk("\n");
7287
7288 printk("Sequencer SCB Info: ");
7289 for (i = 0; i < ahc->scb_data->maxhscbs; i++) {
7290 ahc_outb(ahc, SCBPTR, i);
7291 cur_col = printk("\n%3d ", i);
7292
7293 ahc_scb_control_print(ahc_inb(ahc, SCB_CONTROL), &cur_col, 60);
7294 ahc_scb_scsiid_print(ahc_inb(ahc, SCB_SCSIID), &cur_col, 60);
7295 ahc_scb_lun_print(ahc_inb(ahc, SCB_LUN), &cur_col, 60);
7296 ahc_scb_tag_print(ahc_inb(ahc, SCB_TAG), &cur_col, 60);
7297 }
7298 printk("\n");
7299
7300 printk("Pending list: ");
7301 i = 0;
7302 LIST_FOREACH(scb, &ahc->pending_scbs, pending_links) {
7303 if (i++ > 256)
7304 break;
7305 cur_col = printk("\n%3d ", scb->hscb->tag);
7306 ahc_scb_control_print(scb->hscb->control, &cur_col, 60);
7307 ahc_scb_scsiid_print(scb->hscb->scsiid, &cur_col, 60);
7308 ahc_scb_lun_print(scb->hscb->lun, &cur_col, 60);
7309 if ((ahc->flags & AHC_PAGESCBS) == 0) {
7310 ahc_outb(ahc, SCBPTR, scb->hscb->tag);
7311 printk("(");
7312 ahc_scb_control_print(ahc_inb(ahc, SCB_CONTROL),
7313 &cur_col, 60);
7314 ahc_scb_tag_print(ahc_inb(ahc, SCB_TAG), &cur_col, 60);
7315 printk(")");
7316 }
7317 }
7318 printk("\n");
7319
7320 printk("Kernel Free SCB list: ");
7321 i = 0;
7322 SLIST_FOREACH(scb, &ahc->scb_data->free_scbs, links.sle) {
7323 if (i++ > 256)
7324 break;
7325 printk("%d ", scb->hscb->tag);
7326 }
7327 printk("\n");
7328
7329 maxtarget = (ahc->features & (AHC_WIDE|AHC_TWIN)) ? 15 : 7;
7330 for (target = 0; target <= maxtarget; target++) {
7331 untagged_q = &ahc->untagged_queues[target];
7332 if (TAILQ_FIRST(untagged_q) == NULL)
7333 continue;
7334 printk("Untagged Q(%d): ", target);
7335 i = 0;
7336 TAILQ_FOREACH(scb, untagged_q, links.tqe) {
7337 if (i++ > 256)
7338 break;
7339 printk("%d ", scb->hscb->tag);
7340 }
7341 printk("\n");
7342 }
7343
7344 ahc_platform_dump_card_state(ahc);
7345 printk("\n<<<<<<<<<<<<<<<<< Dump Card State Ends >>>>>>>>>>>>>>>>>>\n");
7346 ahc_outb(ahc, SCBPTR, saved_scbptr);
7347 if (paused == 0)
7348 ahc_unpause(ahc);
7349 }
7350
7351 /************************* Target Mode ****************************************/
7352 #ifdef AHC_TARGET_MODE
7353 cam_status
7354 ahc_find_tmode_devs(struct ahc_softc *ahc, struct cam_sim *sim, union ccb *ccb,
7355 struct ahc_tmode_tstate **tstate,
7356 struct ahc_tmode_lstate **lstate,
7357 int notfound_failure)
7358 {
7359
7360 if ((ahc->features & AHC_TARGETMODE) == 0)
7361 return (CAM_REQ_INVALID);
7362
7363 /*
7364 * Handle the 'black hole' device that sucks up
7365 * requests to unattached luns on enabled targets.
7366 */
7367 if (ccb->ccb_h.target_id == CAM_TARGET_WILDCARD
7368 && ccb->ccb_h.target_lun == CAM_LUN_WILDCARD) {
7369 *tstate = NULL;
7370 *lstate = ahc->black_hole;
7371 } else {
7372 u_int max_id;
7373
7374 max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
7375 if (ccb->ccb_h.target_id >= max_id)
7376 return (CAM_TID_INVALID);
7377
7378 if (ccb->ccb_h.target_lun >= AHC_NUM_LUNS)
7379 return (CAM_LUN_INVALID);
7380
7381 *tstate = ahc->enabled_targets[ccb->ccb_h.target_id];
7382 *lstate = NULL;
7383 if (*tstate != NULL)
7384 *lstate =
7385 (*tstate)->enabled_luns[ccb->ccb_h.target_lun];
7386 }
7387
7388 if (notfound_failure != 0 && *lstate == NULL)
7389 return (CAM_PATH_INVALID);
7390
7391 return (CAM_REQ_CMP);
7392 }
7393
7394 void
7395 ahc_handle_en_lun(struct ahc_softc *ahc, struct cam_sim *sim, union ccb *ccb)
7396 {
7397 struct ahc_tmode_tstate *tstate;
7398 struct ahc_tmode_lstate *lstate;
7399 struct ccb_en_lun *cel;
7400 cam_status status;
7401 u_long s;
7402 u_int target;
7403 u_int lun;
7404 u_int target_mask;
7405 u_int our_id;
7406 int error;
7407 char channel;
7408
7409 status = ahc_find_tmode_devs(ahc, sim, ccb, &tstate, &lstate,
7410 /*notfound_failure*/FALSE);
7411
7412 if (status != CAM_REQ_CMP) {
7413 ccb->ccb_h.status = status;
7414 return;
7415 }
7416
7417 if (cam_sim_bus(sim) == 0)
7418 our_id = ahc->our_id;
7419 else
7420 our_id = ahc->our_id_b;
7421
7422 if (ccb->ccb_h.target_id != our_id) {
7423 /*
7424 * our_id represents our initiator ID, or
7425 * the ID of the first target to have an
7426 * enabled lun in target mode. There are
7427 * two cases that may preclude enabling a
7428 * target id other than our_id.
7429 *
7430 * o our_id is for an active initiator role.
7431 * Since the hardware does not support
7432 * reselections to the initiator role at
7433 * anything other than our_id, and our_id
7434 * is used by the hardware to indicate the
7435 * ID to use for both select-out and
7436 * reselect-out operations, the only target
7437 * ID we can support in this mode is our_id.
7438 *
7439 * o The MULTARGID feature is not available and
7440 * a previous target mode ID has been enabled.
7441 */
7442 if ((ahc->features & AHC_MULTIROLE) != 0) {
7443
7444 if ((ahc->features & AHC_MULTI_TID) != 0
7445 && (ahc->flags & AHC_INITIATORROLE) != 0) {
7446 /*
7447 * Only allow additional targets if
7448 * the initiator role is disabled.
7449 * The hardware cannot handle a re-select-in
7450 * on the initiator id during a re-select-out
7451 * on a different target id.
7452 */
7453 status = CAM_TID_INVALID;
7454 } else if ((ahc->flags & AHC_INITIATORROLE) != 0
7455 || ahc->enabled_luns > 0) {
7456 /*
7457 * Only allow our target id to change
7458 * if the initiator role is not configured
7459 * and there are no enabled luns which
7460 * are attached to the currently registered
7461 * scsi id.
7462 */
7463 status = CAM_TID_INVALID;
7464 }
7465 } else if ((ahc->features & AHC_MULTI_TID) == 0
7466 && ahc->enabled_luns > 0) {
7467
7468 status = CAM_TID_INVALID;
7469 }
7470 }
7471
7472 if (status != CAM_REQ_CMP) {
7473 ccb->ccb_h.status = status;
7474 return;
7475 }
7476
7477 /*
7478 * We now have an id that is valid.
7479 * If we aren't in target mode, switch modes.
7480 */
7481 if ((ahc->flags & AHC_TARGETROLE) == 0
7482 && ccb->ccb_h.target_id != CAM_TARGET_WILDCARD) {
7483 u_long s;
7484 ahc_flag saved_flags;
7485
7486 printk("Configuring Target Mode\n");
7487 ahc_lock(ahc, &s);
7488 if (LIST_FIRST(&ahc->pending_scbs) != NULL) {
7489 ccb->ccb_h.status = CAM_BUSY;
7490 ahc_unlock(ahc, &s);
7491 return;
7492 }
7493 saved_flags = ahc->flags;
7494 ahc->flags |= AHC_TARGETROLE;
7495 if ((ahc->features & AHC_MULTIROLE) == 0)
7496 ahc->flags &= ~AHC_INITIATORROLE;
7497 ahc_pause(ahc);
7498 error = ahc_loadseq(ahc);
7499 if (error != 0) {
7500 /*
7501 * Restore original configuration and notify
7502 * the caller that we cannot support target mode.
7503 * Since the adapter started out in this
7504 * configuration, the firmware load will succeed,
7505 * so there is no point in checking ahc_loadseq's
7506 * return value.
7507 */
7508 ahc->flags = saved_flags;
7509 (void)ahc_loadseq(ahc);
7510 ahc_restart(ahc);
7511 ahc_unlock(ahc, &s);
7512 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
7513 return;
7514 }
7515 ahc_restart(ahc);
7516 ahc_unlock(ahc, &s);
7517 }
7518 cel = &ccb->cel;
7519 target = ccb->ccb_h.target_id;
7520 lun = ccb->ccb_h.target_lun;
7521 channel = SIM_CHANNEL(ahc, sim);
7522 target_mask = 0x01 << target;
7523 if (channel == 'B')
7524 target_mask <<= 8;
7525
7526 if (cel->enable != 0) {
7527 u_int scsiseq;
7528
7529 /* Are we already enabled?? */
7530 if (lstate != NULL) {
7531 xpt_print_path(ccb->ccb_h.path);
7532 printk("Lun already enabled\n");
7533 ccb->ccb_h.status = CAM_LUN_ALRDY_ENA;
7534 return;
7535 }
7536
7537 if (cel->grp6_len != 0
7538 || cel->grp7_len != 0) {
7539 /*
7540 * Don't (yet?) support vendor
7541 * specific commands.
7542 */
7543 ccb->ccb_h.status = CAM_REQ_INVALID;
7544 printk("Non-zero Group Codes\n");
7545 return;
7546 }
7547
7548 /*
7549 * Seems to be okay.
7550 * Setup our data structures.
7551 */
7552 if (target != CAM_TARGET_WILDCARD && tstate == NULL) {
7553 tstate = ahc_alloc_tstate(ahc, target, channel);
7554 if (tstate == NULL) {
7555 xpt_print_path(ccb->ccb_h.path);
7556 printk("Couldn't allocate tstate\n");
7557 ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
7558 return;
7559 }
7560 }
7561 lstate = kmalloc(sizeof(*lstate), GFP_ATOMIC);
7562 if (lstate == NULL) {
7563 xpt_print_path(ccb->ccb_h.path);
7564 printk("Couldn't allocate lstate\n");
7565 ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
7566 return;
7567 }
7568 memset(lstate, 0, sizeof(*lstate));
7569 status = xpt_create_path(&lstate->path, /*periph*/NULL,
7570 xpt_path_path_id(ccb->ccb_h.path),
7571 xpt_path_target_id(ccb->ccb_h.path),
7572 xpt_path_lun_id(ccb->ccb_h.path));
7573 if (status != CAM_REQ_CMP) {
7574 kfree(lstate);
7575 xpt_print_path(ccb->ccb_h.path);
7576 printk("Couldn't allocate path\n");
7577 ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
7578 return;
7579 }
7580 SLIST_INIT(&lstate->accept_tios);
7581 SLIST_INIT(&lstate->immed_notifies);
7582 ahc_lock(ahc, &s);
7583 ahc_pause(ahc);
7584 if (target != CAM_TARGET_WILDCARD) {
7585 tstate->enabled_luns[lun] = lstate;
7586 ahc->enabled_luns++;
7587
7588 if ((ahc->features & AHC_MULTI_TID) != 0) {
7589 u_int targid_mask;
7590
7591 targid_mask = ahc_inb(ahc, TARGID)
7592 | (ahc_inb(ahc, TARGID + 1) << 8);
7593
7594 targid_mask |= target_mask;
7595 ahc_outb(ahc, TARGID, targid_mask);
7596 ahc_outb(ahc, TARGID+1, (targid_mask >> 8));
7597
7598 ahc_update_scsiid(ahc, targid_mask);
7599 } else {
7600 u_int our_id;
7601 char channel;
7602
7603 channel = SIM_CHANNEL(ahc, sim);
7604 our_id = SIM_SCSI_ID(ahc, sim);
7605
7606 /*
7607 * This can only happen if selections
7608 * are not enabled
7609 */
7610 if (target != our_id) {
7611 u_int sblkctl;
7612 char cur_channel;
7613 int swap;
7614
7615 sblkctl = ahc_inb(ahc, SBLKCTL);
7616 cur_channel = (sblkctl & SELBUSB)
7617 ? 'B' : 'A';
7618 if ((ahc->features & AHC_TWIN) == 0)
7619 cur_channel = 'A';
7620 swap = cur_channel != channel;
7621 if (channel == 'A')
7622 ahc->our_id = target;
7623 else
7624 ahc->our_id_b = target;
7625
7626 if (swap)
7627 ahc_outb(ahc, SBLKCTL,
7628 sblkctl ^ SELBUSB);
7629
7630 ahc_outb(ahc, SCSIID, target);
7631
7632 if (swap)
7633 ahc_outb(ahc, SBLKCTL, sblkctl);
7634 }
7635 }
7636 } else
7637 ahc->black_hole = lstate;
7638 /* Allow select-in operations */
7639 if (ahc->black_hole != NULL && ahc->enabled_luns > 0) {
7640 scsiseq = ahc_inb(ahc, SCSISEQ_TEMPLATE);
7641 scsiseq |= ENSELI;
7642 ahc_outb(ahc, SCSISEQ_TEMPLATE, scsiseq);
7643 scsiseq = ahc_inb(ahc, SCSISEQ);
7644 scsiseq |= ENSELI;
7645 ahc_outb(ahc, SCSISEQ, scsiseq);
7646 }
7647 ahc_unpause(ahc);
7648 ahc_unlock(ahc, &s);
7649 ccb->ccb_h.status = CAM_REQ_CMP;
7650 xpt_print_path(ccb->ccb_h.path);
7651 printk("Lun now enabled for target mode\n");
7652 } else {
7653 struct scb *scb;
7654 int i, empty;
7655
7656 if (lstate == NULL) {
7657 ccb->ccb_h.status = CAM_LUN_INVALID;
7658 return;
7659 }
7660
7661 ahc_lock(ahc, &s);
7662
7663 ccb->ccb_h.status = CAM_REQ_CMP;
7664 LIST_FOREACH(scb, &ahc->pending_scbs, pending_links) {
7665 struct ccb_hdr *ccbh;
7666
7667 ccbh = &scb->io_ctx->ccb_h;
7668 if (ccbh->func_code == XPT_CONT_TARGET_IO
7669 && !xpt_path_comp(ccbh->path, ccb->ccb_h.path)){
7670 printk("CTIO pending\n");
7671 ccb->ccb_h.status = CAM_REQ_INVALID;
7672 ahc_unlock(ahc, &s);
7673 return;
7674 }
7675 }
7676
7677 if (SLIST_FIRST(&lstate->accept_tios) != NULL) {
7678 printk("ATIOs pending\n");
7679 ccb->ccb_h.status = CAM_REQ_INVALID;
7680 }
7681
7682 if (SLIST_FIRST(&lstate->immed_notifies) != NULL) {
7683 printk("INOTs pending\n");
7684 ccb->ccb_h.status = CAM_REQ_INVALID;
7685 }
7686
7687 if (ccb->ccb_h.status != CAM_REQ_CMP) {
7688 ahc_unlock(ahc, &s);
7689 return;
7690 }
7691
7692 xpt_print_path(ccb->ccb_h.path);
7693 printk("Target mode disabled\n");
7694 xpt_free_path(lstate->path);
7695 kfree(lstate);
7696
7697 ahc_pause(ahc);
7698 /* Can we clean up the target too? */
7699 if (target != CAM_TARGET_WILDCARD) {
7700 tstate->enabled_luns[lun] = NULL;
7701 ahc->enabled_luns--;
7702 for (empty = 1, i = 0; i < 8; i++)
7703 if (tstate->enabled_luns[i] != NULL) {
7704 empty = 0;
7705 break;
7706 }
7707
7708 if (empty) {
7709 ahc_free_tstate(ahc, target, channel,
7710 /*force*/FALSE);
7711 if (ahc->features & AHC_MULTI_TID) {
7712 u_int targid_mask;
7713
7714 targid_mask = ahc_inb(ahc, TARGID)
7715 | (ahc_inb(ahc, TARGID + 1)
7716 << 8);
7717
7718 targid_mask &= ~target_mask;
7719 ahc_outb(ahc, TARGID, targid_mask);
7720 ahc_outb(ahc, TARGID+1,
7721 (targid_mask >> 8));
7722 ahc_update_scsiid(ahc, targid_mask);
7723 }
7724 }
7725 } else {
7726
7727 ahc->black_hole = NULL;
7728
7729 /*
7730 * We can't allow selections without
7731 * our black hole device.
7732 */
7733 empty = TRUE;
7734 }
7735 if (ahc->enabled_luns == 0) {
7736 /* Disallow select-in */
7737 u_int scsiseq;
7738
7739 scsiseq = ahc_inb(ahc, SCSISEQ_TEMPLATE);
7740 scsiseq &= ~ENSELI;
7741 ahc_outb(ahc, SCSISEQ_TEMPLATE, scsiseq);
7742 scsiseq = ahc_inb(ahc, SCSISEQ);
7743 scsiseq &= ~ENSELI;
7744 ahc_outb(ahc, SCSISEQ, scsiseq);
7745
7746 if ((ahc->features & AHC_MULTIROLE) == 0) {
7747 printk("Configuring Initiator Mode\n");
7748 ahc->flags &= ~AHC_TARGETROLE;
7749 ahc->flags |= AHC_INITIATORROLE;
7750 /*
7751 * Returning to a configuration that
7752 * fit previously will always succeed.
7753 */
7754 (void)ahc_loadseq(ahc);
7755 ahc_restart(ahc);
7756 /*
7757 * Unpaused. The extra unpause
7758 * that follows is harmless.
7759 */
7760 }
7761 }
7762 ahc_unpause(ahc);
7763 ahc_unlock(ahc, &s);
7764 }
7765 }
7766
7767 static void
7768 ahc_update_scsiid(struct ahc_softc *ahc, u_int targid_mask)
7769 {
7770 u_int scsiid_mask;
7771 u_int scsiid;
7772
7773 if ((ahc->features & AHC_MULTI_TID) == 0)
7774 panic("ahc_update_scsiid called on non-multitid unit\n");
7775
7776 /*
7777 * Since we will rely on the TARGID mask
7778 * for selection enables, ensure that OID
7779 * in SCSIID is not set to some other ID
7780 * that we don't want to allow selections on.
7781 */
7782 if ((ahc->features & AHC_ULTRA2) != 0)
7783 scsiid = ahc_inb(ahc, SCSIID_ULTRA2);
7784 else
7785 scsiid = ahc_inb(ahc, SCSIID);
7786 scsiid_mask = 0x1 << (scsiid & OID);
7787 if ((targid_mask & scsiid_mask) == 0) {
7788 u_int our_id;
7789
7790 /* ffs counts from 1 */
7791 our_id = ffs(targid_mask);
7792 if (our_id == 0)
7793 our_id = ahc->our_id;
7794 else
7795 our_id--;
7796 scsiid &= TID;
7797 scsiid |= our_id;
7798 }
7799 if ((ahc->features & AHC_ULTRA2) != 0)
7800 ahc_outb(ahc, SCSIID_ULTRA2, scsiid);
7801 else
7802 ahc_outb(ahc, SCSIID, scsiid);
7803 }
7804
7805 static void
7806 ahc_run_tqinfifo(struct ahc_softc *ahc, int paused)
7807 {
7808 struct target_cmd *cmd;
7809
7810 /*
7811 * If the card supports auto-access pause,
7812 * we can access the card directly regardless
7813 * of whether it is paused or not.
7814 */
7815 if ((ahc->features & AHC_AUTOPAUSE) != 0)
7816 paused = TRUE;
7817
7818 ahc_sync_tqinfifo(ahc, BUS_DMASYNC_POSTREAD);
7819 while ((cmd = &ahc->targetcmds[ahc->tqinfifonext])->cmd_valid != 0) {
7820
7821 /*
7822 * Only advance through the queue if we
7823 * have the resources to process the command.
7824 */
7825 if (ahc_handle_target_cmd(ahc, cmd) != 0)
7826 break;
7827
7828 cmd->cmd_valid = 0;
7829 ahc_dmamap_sync(ahc, ahc->shared_data_dmat,
7830 ahc->shared_data_dmamap,
7831 ahc_targetcmd_offset(ahc, ahc->tqinfifonext),
7832 sizeof(struct target_cmd),
7833 BUS_DMASYNC_PREREAD);
7834 ahc->tqinfifonext++;
7835
7836 /*
7837 * Lazily update our position in the target mode incoming
7838 * command queue as seen by the sequencer.
7839 */
7840 if ((ahc->tqinfifonext & (HOST_TQINPOS - 1)) == 1) {
7841 if ((ahc->features & AHC_HS_MAILBOX) != 0) {
7842 u_int hs_mailbox;
7843
7844 hs_mailbox = ahc_inb(ahc, HS_MAILBOX);
7845 hs_mailbox &= ~HOST_TQINPOS;
7846 hs_mailbox |= ahc->tqinfifonext & HOST_TQINPOS;
7847 ahc_outb(ahc, HS_MAILBOX, hs_mailbox);
7848 } else {
7849 if (!paused)
7850 ahc_pause(ahc);
7851 ahc_outb(ahc, KERNEL_TQINPOS,
7852 ahc->tqinfifonext & HOST_TQINPOS);
7853 if (!paused)
7854 ahc_unpause(ahc);
7855 }
7856 }
7857 }
7858 }
7859
7860 static int
7861 ahc_handle_target_cmd(struct ahc_softc *ahc, struct target_cmd *cmd)
7862 {
7863 struct ahc_tmode_tstate *tstate;
7864 struct ahc_tmode_lstate *lstate;
7865 struct ccb_accept_tio *atio;
7866 uint8_t *byte;
7867 int initiator;
7868 int target;
7869 int lun;
7870
7871 initiator = SCSIID_TARGET(ahc, cmd->scsiid);
7872 target = SCSIID_OUR_ID(cmd->scsiid);
7873 lun = (cmd->identify & MSG_IDENTIFY_LUNMASK);
7874
7875 byte = cmd->bytes;
7876 tstate = ahc->enabled_targets[target];
7877 lstate = NULL;
7878 if (tstate != NULL)
7879 lstate = tstate->enabled_luns[lun];
7880
7881 /*
7882 * Commands for disabled luns go to the black hole driver.
7883 */
7884 if (lstate == NULL)
7885 lstate = ahc->black_hole;
7886
7887 atio = (struct ccb_accept_tio*)SLIST_FIRST(&lstate->accept_tios);
7888 if (atio == NULL) {
7889 ahc->flags |= AHC_TQINFIFO_BLOCKED;
7890 /*
7891 * Wait for more ATIOs from the peripheral driver for this lun.
7892 */
7893 if (bootverbose)
7894 printk("%s: ATIOs exhausted\n", ahc_name(ahc));
7895 return (1);
7896 } else
7897 ahc->flags &= ~AHC_TQINFIFO_BLOCKED;
7898 #if 0
7899 printk("Incoming command from %d for %d:%d%s\n",
7900 initiator, target, lun,
7901 lstate == ahc->black_hole ? "(Black Holed)" : "");
7902 #endif
7903 SLIST_REMOVE_HEAD(&lstate->accept_tios, sim_links.sle);
7904
7905 if (lstate == ahc->black_hole) {
7906 /* Fill in the wildcards */
7907 atio->ccb_h.target_id = target;
7908 atio->ccb_h.target_lun = lun;
7909 }
7910
7911 /*
7912 * Package it up and send it off to
7913 * whomever has this lun enabled.
7914 */
7915 atio->sense_len = 0;
7916 atio->init_id = initiator;
7917 if (byte[0] != 0xFF) {
7918 /* Tag was included */
7919 atio->tag_action = *byte++;
7920 atio->tag_id = *byte++;
7921 atio->ccb_h.flags = CAM_TAG_ACTION_VALID;
7922 } else {
7923 atio->ccb_h.flags = 0;
7924 }
7925 byte++;
7926
7927 /* Okay. Now determine the cdb size based on the command code */
7928 switch (*byte >> CMD_GROUP_CODE_SHIFT) {
7929 case 0:
7930 atio->cdb_len = 6;
7931 break;
7932 case 1:
7933 case 2:
7934 atio->cdb_len = 10;
7935 break;
7936 case 4:
7937 atio->cdb_len = 16;
7938 break;
7939 case 5:
7940 atio->cdb_len = 12;
7941 break;
7942 case 3:
7943 default:
7944 /* Only copy the opcode. */
7945 atio->cdb_len = 1;
7946 printk("Reserved or VU command code type encountered\n");
7947 break;
7948 }
7949
7950 memcpy(atio->cdb_io.cdb_bytes, byte, atio->cdb_len);
7951
7952 atio->ccb_h.status |= CAM_CDB_RECVD;
7953
7954 if ((cmd->identify & MSG_IDENTIFY_DISCFLAG) == 0) {
7955 /*
7956 * We weren't allowed to disconnect.
7957 * We're hanging on the bus until a
7958 * continue target I/O comes in response
7959 * to this accept tio.
7960 */
7961 #if 0
7962 printk("Received Immediate Command %d:%d:%d - %p\n",
7963 initiator, target, lun, ahc->pending_device);
7964 #endif
7965 ahc->pending_device = lstate;
7966 ahc_freeze_ccb((union ccb *)atio);
7967 atio->ccb_h.flags |= CAM_DIS_DISCONNECT;
7968 }
7969 xpt_done((union ccb*)atio);
7970 return (0);
7971 }
7972
7973 #endif