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