?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Fix missing update to reflect change in scsi_inquiry data structure.
[dragonfly.git] / sys / dev / disk / ahb / ahb.c
blobb0c20e773e0b1a7f04992c27bb886c0b8e9fa645
1 /*
2 * CAM SCSI device driver for the Adaptec 174X SCSI Host adapter
3 *
4 * Copyright (c) 1998 Justin T. Gibbs
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice immediately at the beginning of the file, without modification,
12 * this list of conditions, and the following disclaimer.
13 * 2. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD: src/sys/dev/ahb/ahb.c,v 1.18.2.3 2001/03/05 13:08:55 obrien Exp $
29 * $DragonFly: src/sys/dev/disk/ahb/ahb.c,v 1.16 2007/12/02 03:54:16 pavalos Exp $
30 */
31
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/kernel.h>
35 #include <sys/malloc.h>
36 #include <sys/module.h>
37 #include <sys/bus.h>
38 #include <sys/rman.h>
39 #include <sys/thread2.h>
40
41 #include <machine/clock.h>
42
43 #include <bus/cam/cam.h>
44 #include <bus/cam/cam_ccb.h>
45 #include <bus/cam/cam_sim.h>
46 #include <bus/cam/cam_xpt_sim.h>
47 #include <bus/cam/cam_debug.h>
48
49 #include <bus/cam/scsi/scsi_message.h>
50
51 #include <bus/eisa/eisaconf.h>
52
53 #include "ahbreg.h"
54
55 #define ccb_ecb_ptr spriv_ptr0
56 #define ccb_ahb_ptr spriv_ptr1
57
58 #define ahb_inb(ahb, port) \
59 bus_space_read_1((ahb)->tag, (ahb)->bsh, port)
60
61 #define ahb_inl(ahb, port) \
62 bus_space_read_4((ahb)->tag, (ahb)->bsh, port)
63
64 #define ahb_outb(ahb, port, value) \
65 bus_space_write_1((ahb)->tag, (ahb)->bsh, port, value)
66
67 #define ahb_outl(ahb, port, value) \
68 bus_space_write_4((ahb)->tag, (ahb)->bsh, port, value)
69
70 static const char *ahbmatch(eisa_id_t type);
71 static struct ahb_softc *ahballoc(u_long unit, struct resource *res);
72 static void ahbfree(struct ahb_softc *ahb);
73 static int ahbreset(struct ahb_softc *ahb);
74 static void ahbmapecbs(void *arg, bus_dma_segment_t *segs,
75 int nseg, int error);
76 static int ahbxptattach(struct ahb_softc *ahb);
77 static void ahbhandleimmed(struct ahb_softc *ahb,
78 u_int32_t mbox, u_int intstat);
79 static void ahbcalcresid(struct ahb_softc *ahb,
80 struct ecb *ecb, union ccb *ccb);
81 static __inline void ahbdone(struct ahb_softc *ahb, u_int32_t mbox,
82 u_int intstat);
83 static void ahbintr(void *arg);
84 static bus_dmamap_callback_t ahbexecuteecb;
85 static void ahbaction(struct cam_sim *sim, union ccb *ccb);
86 static void ahbpoll(struct cam_sim *sim);
87
88 /* Our timeout handler */
89 static timeout_t ahbtimeout;
90
91 static __inline struct ecb* ahbecbget(struct ahb_softc *ahb);
92 static __inline void ahbecbfree(struct ahb_softc* ahb,
93 struct ecb* ecb);
94 static __inline u_int32_t ahbecbvtop(struct ahb_softc *ahb,
95 struct ecb *ecb);
96 static __inline struct ecb* ahbecbptov(struct ahb_softc *ahb,
97 u_int32_t ecb_addr);
98 static __inline u_int32_t ahbstatuspaddr(u_int32_t ecb_paddr);
99 static __inline u_int32_t ahbsensepaddr(u_int32_t ecb_paddr);
100 static __inline u_int32_t ahbsgpaddr(u_int32_t ecb_paddr);
101 static __inline void ahbqueuembox(struct ahb_softc *ahb,
102 u_int32_t mboxval,
103 u_int attn_code);
104
105 static __inline struct ecb*
106 ahbecbget(struct ahb_softc *ahb)
107 {
108 struct ecb* ecb;
109
110 crit_enter();
111 if ((ecb = SLIST_FIRST(&ahb->free_ecbs)) != NULL)
112 SLIST_REMOVE_HEAD(&ahb->free_ecbs, links);
113 crit_exit();
114
115 return (ecb);
116 }
117
118 static __inline void
119 ahbecbfree(struct ahb_softc* ahb, struct ecb* ecb)
120 {
121 crit_enter();
122 ecb->state = ECB_FREE;
123 SLIST_INSERT_HEAD(&ahb->free_ecbs, ecb, links);
124 crit_exit();
125 }
126
127 static __inline u_int32_t
128 ahbecbvtop(struct ahb_softc *ahb, struct ecb *ecb)
129 {
130 return (ahb->ecb_physbase
131 + (u_int32_t)((caddr_t)ecb - (caddr_t)ahb->ecb_array));
132 }
133
134 static __inline struct ecb*
135 ahbecbptov(struct ahb_softc *ahb, u_int32_t ecb_addr)
136 {
137 return (ahb->ecb_array
138 + ((struct ecb*)ecb_addr - (struct ecb*)ahb->ecb_physbase));
139 }
140
141 static __inline u_int32_t
142 ahbstatuspaddr(u_int32_t ecb_paddr)
143 {
144 return (ecb_paddr + offsetof(struct ecb, status));
145 }
146
147 static __inline u_int32_t
148 ahbsensepaddr(u_int32_t ecb_paddr)
149 {
150 return (ecb_paddr + offsetof(struct ecb, sense));
151 }
152
153 static __inline u_int32_t
154 ahbsgpaddr(u_int32_t ecb_paddr)
155 {
156 return (ecb_paddr + offsetof(struct ecb, sg_list));
157 }
158
159 static __inline void
160 ahbqueuembox(struct ahb_softc *ahb, u_int32_t mboxval, u_int attn_code)
161 {
162 u_int loopmax = 300;
163 while (--loopmax) {
164 u_int status;
165
166 status = ahb_inb(ahb, HOSTSTAT);
167 if ((status & (HOSTSTAT_MBOX_EMPTY|HOSTSTAT_BUSY))
168 == HOSTSTAT_MBOX_EMPTY)
169 break;
170 DELAY(20);
171 }
172 if (loopmax == 0)
173 panic("ahb%ld: adapter not taking commands\n", ahb->unit);
174
175 ahb_outl(ahb, MBOXOUT0, mboxval);
176 ahb_outb(ahb, ATTN, attn_code);
177 }
178
179 static const char *
180 ahbmatch(eisa_id_t type)
181 {
182 switch(type & 0xfffffe00) {
183 case EISA_DEVICE_ID_ADAPTEC_1740:
184 return ("Adaptec 174x SCSI host adapter");
185 break;
186 default:
187 break;
188 }
189 return (NULL);
190 }
191
192 static int
193 ahbprobe(device_t dev)
194 {
195 const char *desc;
196 u_int32_t iobase;
197 u_int32_t irq;
198 u_int8_t intdef;
199 int shared;
200
201 desc = ahbmatch(eisa_get_id(dev));
202 if (!desc)
203 return (ENXIO);
204 device_set_desc(dev, desc);
205
206 iobase = (eisa_get_slot(dev) * EISA_SLOT_SIZE) +
207 AHB_EISA_SLOT_OFFSET;
208
209 eisa_add_iospace(dev, iobase, AHB_EISA_IOSIZE, RESVADDR_NONE);
210
211 intdef = inb(INTDEF + iobase);
212 switch (intdef & 0x7) {
213 case INT9:
214 irq = 9;
215 break;
216 case INT10:
217 irq = 10;
218 break;
219 case INT11:
220 irq = 11;
221 break;
222 case INT12:
223 irq = 12;
224 break;
225 case INT14:
226 irq = 14;
227 break;
228 case INT15:
229 irq = 15;
230 break;
231 default:
232 kprintf("Adaptec 174X at slot %d: illegal "
233 "irq setting %d\n", eisa_get_slot(dev),
234 (intdef & 0x7));
235 irq = 0;
236 break;
237 }
238 if (irq == 0)
239 return ENXIO;
240
241 shared = (inb(INTDEF + iobase) & INTLEVEL) ?
242 EISA_TRIGGER_LEVEL : EISA_TRIGGER_EDGE;
243
244 eisa_add_intr(dev, irq, shared);
245
246 return 0;
247 }
248
249 static int
250 ahbattach(device_t dev)
251 {
252 /*
253 * find unit and check we have that many defined
254 */
255 struct ahb_softc *ahb;
256 struct ecb* next_ecb;
257 struct resource *io = 0;
258 struct resource *irq = 0;
259 int rid;
260 void *ih;
261
262 rid = 0;
263 io = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
264 0, ~0, 1, RF_ACTIVE);
265 if (!io) {
266 device_printf(dev, "No I/O space?!\n");
267 return ENOMEM;
268 }
269
270 if ((ahb = ahballoc(device_get_unit(dev), io)) == NULL) {
271 goto error_exit2;
272 }
273
274 if (ahbreset(ahb) != 0)
275 goto error_exit;
276
277 rid = 0;
278 irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid,
279 0, ~0, 1, RF_ACTIVE);
280 if (!irq) {
281 device_printf(dev, "Can't allocate interrupt\n");
282 goto error_exit;
283 }
284
285 /*
286 * Create our DMA tags. These tags define the kinds of device
287 * accessible memory allocations and memory mappings we will
288 * need to perform during normal operation.
289 */
290 /* DMA tag for mapping buffers into device visible space. */
291 /* XXX Should be a child of the EISA bus dma tag */
292 if (bus_dma_tag_create(/*parent*/NULL, /*alignment*/1, /*boundary*/0,
293 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
294 /*highaddr*/BUS_SPACE_MAXADDR,
295 /*filter*/NULL, /*filterarg*/NULL,
296 /*maxsize*/MAXBSIZE, /*nsegments*/AHB_NSEG,
297 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
298 /*flags*/BUS_DMA_ALLOCNOW,
299 &ahb->buffer_dmat) != 0)
300 goto error_exit;
301
302 ahb->init_level++;
303
304 /* DMA tag for our ccb structures and ha inquiry data */
305 if (bus_dma_tag_create(/*parent*/NULL, /*alignment*/1, /*boundary*/0,
306 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
307 /*highaddr*/BUS_SPACE_MAXADDR,
308 /*filter*/NULL, /*filterarg*/NULL,
309 (AHB_NECB * sizeof(struct ecb))
310 + sizeof(*ahb->ha_inq_data),
311 /*nsegments*/1,
312 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
313 /*flags*/0, &ahb->ecb_dmat) != 0)
314 goto error_exit;
315
316 ahb->init_level++;
317
318 /* Allocation for our ccbs */
319 if (bus_dmamem_alloc(ahb->ecb_dmat, (void **)&ahb->ecb_array,
320 BUS_DMA_NOWAIT, &ahb->ecb_dmamap) != 0)
321 goto error_exit;
322
323 ahb->ha_inq_data = (struct ha_inquiry_data *)&ahb->ecb_array[AHB_NECB];
324
325 ahb->init_level++;
326
327 /* And permanently map them */
328 bus_dmamap_load(ahb->ecb_dmat, ahb->ecb_dmamap,
329 ahb->ecb_array, AHB_NSEG * sizeof(struct ecb),
330 ahbmapecbs, ahb, /*flags*/0);
331
332 ahb->init_level++;
333
334 /* Allocate the buffer dmamaps for each of our ECBs */
335 bzero(ahb->ecb_array, (AHB_NECB * sizeof(struct ecb))
336 + sizeof(*ahb->ha_inq_data));
337 next_ecb = ahb->ecb_array;
338 while (ahb->num_ecbs < AHB_NECB) {
339 u_int32_t ecb_paddr;
340
341 if (bus_dmamap_create(ahb->buffer_dmat, /*flags*/0,
342 &next_ecb->dmamap))
343 break;
344 ecb_paddr = ahbecbvtop(ahb, next_ecb);
345 next_ecb->hecb.status_ptr = ahbstatuspaddr(ecb_paddr);
346 next_ecb->hecb.sense_ptr = ahbsensepaddr(ecb_paddr);
347 ahb->num_ecbs++;
348 ahbecbfree(ahb, next_ecb);
349 next_ecb++;
350 }
351
352 if (ahb->num_ecbs == 0)
353 goto error_exit;
354
355 ahb->init_level++;
356
357 /*
358 * Now that we know we own the resources we need, register
359 * our bus with the XPT.
360 */
361 if (ahbxptattach(ahb))
362 goto error_exit;
363
364 /* Enable our interrupt */
365 bus_setup_intr(dev, irq, 0, ahbintr, ahb, &ih, NULL);
366 return (0);
367
368 error_exit:
369 /*
370 * The board's IRQ line will not be left enabled
371 * if we can't intialize correctly, so its safe
372 * to release the irq.
373 */
374 ahbfree(ahb);
375 error_exit2:
376 if (io)
377 bus_release_resource(dev, SYS_RES_IOPORT, 0, io);
378 if (irq)
379 bus_release_resource(dev, SYS_RES_IRQ, 0, irq);
380 return (-1);
381 }
382
383 static struct ahb_softc *
384 ahballoc(u_long unit, struct resource *res)
385 {
386 struct ahb_softc *ahb;
387
388 /*
389 * Allocate a storage area for us
390 */
391 ahb = kmalloc(sizeof(struct ahb_softc), M_DEVBUF, M_INTWAIT | M_ZERO);
392 SLIST_INIT(&ahb->free_ecbs);
393 LIST_INIT(&ahb->pending_ccbs);
394 ahb->unit = unit;
395 ahb->tag = rman_get_bustag(res);
396 ahb->bsh = rman_get_bushandle(res);
397 ahb->disc_permitted = ~0;
398 ahb->tags_permitted = ~0;
399
400 return (ahb);
401 }
402
403 static void
404 ahbfree(struct ahb_softc *ahb)
405 {
406 switch (ahb->init_level) {
407 default:
408 case 4:
409 bus_dmamap_unload(ahb->ecb_dmat, ahb->ecb_dmamap);
410 /* fall through */
411 case 3:
412 bus_dmamem_free(ahb->ecb_dmat, ahb->ecb_array,
413 ahb->ecb_dmamap);
414 bus_dmamap_destroy(ahb->ecb_dmat, ahb->ecb_dmamap);
415 /* fall through */
416 case 2:
417 bus_dma_tag_destroy(ahb->ecb_dmat);
418 /* fall through */
419 case 1:
420 bus_dma_tag_destroy(ahb->buffer_dmat);
421 /* fall through */
422 case 0:
423 break;
424 }
425 kfree(ahb, M_DEVBUF);
426 }
427
428 /*
429 * reset board, If it doesn't respond, return failure
430 */
431 static int
432 ahbreset(struct ahb_softc *ahb)
433 {
434 int wait = 1000; /* 1 sec enough? */
435 int test;
436
437 if ((ahb_inb(ahb, PORTADDR) & PORTADDR_ENHANCED) == 0) {
438 kprintf("ahb_reset: Controller not in enhanced mode\n");
439 return (-1);
440 }
441
442 ahb_outb(ahb, CONTROL, CNTRL_HARD_RST);
443 DELAY(1000);
444 ahb_outb(ahb, CONTROL, 0);
445 while (--wait) {
446 DELAY(1000);
447 if ((ahb_inb(ahb, HOSTSTAT) & HOSTSTAT_BUSY) == 0)
448 break;
449 }
450
451 if (wait == 0) {
452 kprintf("ahbreset: No answer from aha1742 board\n");
453 return (-1);
454 }
455 if ((test = ahb_inb(ahb, MBOXIN0)) != 0) {
456 kprintf("ahb_reset: self test failed, val = 0x%x\n", test);
457 return (-1);
458 }
459 while (ahb_inb(ahb, HOSTSTAT) & HOSTSTAT_INTPEND) {
460 ahb_outb(ahb, CONTROL, CNTRL_CLRINT);
461 DELAY(10000);
462 }
463 return (0);
464 }
465
466 static void
467 ahbmapecbs(void *arg, bus_dma_segment_t *segs, int nseg, int error)
468 {
469 struct ahb_softc* ahb;
470
471 ahb = (struct ahb_softc*)arg;
472 ahb->ecb_physbase = segs->ds_addr;
473 /*
474 * Space for adapter inquiry information is on the
475 * tail of the ecb array.
476 */
477 ahb->ha_inq_physbase = ahbecbvtop(ahb, &ahb->ecb_array[AHB_NECB]);
478 }
479
480 static int
481 ahbxptattach(struct ahb_softc *ahb)
482 {
483 struct ecb *ecb;
484 u_int i;
485
486 /* Remeber who are we on the scsi bus */
487 ahb->scsi_id = ahb_inb(ahb, SCSIDEF) & HSCSIID;
488
489 /* Use extended translation?? */
490 ahb->extended_trans = ahb_inb(ahb, RESV1) & EXTENDED_TRANS;
491
492 /* Fetch adapter inquiry data */
493 ecb = ahbecbget(ahb); /* Always succeeds - no outstanding commands */
494 ecb->hecb.opcode = ECBOP_READ_HA_INQDATA;
495 ecb->hecb.flag_word1 = FW1_SUPPRESS_URUN_ERR|FW1_ERR_STATUS_BLK_ONLY;
496 ecb->hecb.data_ptr = ahb->ha_inq_physbase;
497 ecb->hecb.data_len = sizeof(struct ha_inquiry_data);
498 ecb->hecb.sense_ptr = 0;
499 ecb->state = ECB_ACTIVE;
500
501 /* Tell the adapter about this command */
502 ahbqueuembox(ahb, ahbecbvtop(ahb, ecb),
503 ATTN_STARTECB|ahb->scsi_id);
504
505 /* Poll for interrupt completion */
506 for (i = 1000; ecb->state != ECB_FREE && i != 0; i--) {
507 ahbintr(ahb);
508 DELAY(1000);
509 }
510
511 ahb->num_ecbs = MIN(ahb->num_ecbs,
512 ahb->ha_inq_data->scsi_data.spc2_flags);
513 kprintf("ahb%ld: %.8s %s SCSI Adapter, FW Rev. %.4s, ID=%d, %d ECBs\n",
514 ahb->unit, ahb->ha_inq_data->scsi_data.product,
515 (ahb->ha_inq_data->scsi_data.flags & 0x4) ? "Differential"
516 : "Single Ended",
517 ahb->ha_inq_data->scsi_data.revision,
518 ahb->scsi_id, ahb->num_ecbs);
519
520 /* Restore sense paddr for future CCB clients */
521 ecb->hecb.sense_ptr = ahbsensepaddr(ahbecbvtop(ahb, ecb));
522
523 ahbecbfree(ahb, ecb);
524
525 /*
526 * Construct our SIM entry
527 */
528 ahb->sim = cam_sim_alloc(ahbaction, ahbpoll, "ahb", ahb, ahb->unit,
529 2, ahb->num_ecbs, NULL);
530 if (ahb->sim == NULL)
531 return (ENOMEM);
532
533 if (xpt_bus_register(ahb->sim, 0) != CAM_SUCCESS) {
534 cam_sim_free(ahb->sim);
535 return (ENXIO);
536 }
537
538 if (xpt_create_path(&ahb->path, /*periph*/NULL,
539 cam_sim_path(ahb->sim), CAM_TARGET_WILDCARD,
540 CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
541 xpt_bus_deregister(cam_sim_path(ahb->sim));
542 cam_sim_free(ahb->sim);
543 return (ENXIO);
544 }
545
546 /*
547 * Allow the board to generate interrupts.
548 */
549 ahb_outb(ahb, INTDEF, ahb_inb(ahb, INTDEF) | INTEN);
550
551 return (0);
552 }
553
554 static void
555 ahbhandleimmed(struct ahb_softc *ahb, u_int32_t mbox, u_int intstat)
556 {
557 struct ccb_hdr *ccb_h;
558 u_int target_id;
559
560 if (ahb->immed_cmd == 0) {
561 kprintf("ahb%ld: Immediate Command complete with no "
562 " pending command\n", ahb->unit);
563 return;
564 }
565
566 target_id = intstat & INTSTAT_TARGET_MASK;
567
568 ccb_h = LIST_FIRST(&ahb->pending_ccbs);
569 while (ccb_h != NULL) {
570 struct ecb *pending_ecb;
571 union ccb *ccb;
572
573 pending_ecb = (struct ecb *)ccb_h->ccb_ecb_ptr;
574 ccb = pending_ecb->ccb;
575 ccb_h = LIST_NEXT(ccb_h, sim_links.le);
576 if (ccb->ccb_h.target_id == target_id
577 || target_id == ahb->scsi_id) {
578 callout_stop(&ccb->ccb_h.timeout_ch);
579 LIST_REMOVE(&ccb->ccb_h, sim_links.le);
580 if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE)
581 bus_dmamap_unload(ahb->buffer_dmat,
582 pending_ecb->dmamap);
583 if (pending_ecb == ahb->immed_ecb)
584 ccb->ccb_h.status =
585 CAM_CMD_TIMEOUT|CAM_RELEASE_SIMQ;
586 else if (target_id == ahb->scsi_id)
587 ccb->ccb_h.status = CAM_SCSI_BUS_RESET;
588 else
589 ccb->ccb_h.status = CAM_BDR_SENT;
590 ahbecbfree(ahb, pending_ecb);
591 xpt_done(ccb);
592 } else if (ahb->immed_ecb != NULL) {
593 /* Re-instate timeout */
594 callout_reset(&ccb->ccb_h.timeout_ch,
595 (ccb->ccb_h.timeout * hz) / 1000,
596 ahbtimeout, pending_ecb);
597 }
598 }
599
600 if (ahb->immed_ecb != NULL) {
601 ahb->immed_ecb = NULL;
602 kprintf("ahb%ld: No longer in timeout\n", ahb->unit);
603 } else if (target_id == ahb->scsi_id)
604 kprintf("ahb%ld: SCSI Bus Reset Delivered\n", ahb->unit);
605 else
606 kprintf("ahb%ld: Bus Device Reset Delivered to target %d\n",
607 ahb->unit, target_id);
608
609 ahb->immed_cmd = 0;
610 }
611
612 static void
613 ahbcalcresid(struct ahb_softc *ahb, struct ecb *ecb, union ccb *ccb)
614 {
615 if (ecb->status.data_overrun != 0) {
616 /*
617 * Overrun Condition. The hardware doesn't
618 * provide a meaningful byte count in this case
619 * (the residual is always 0). Tell the XPT
620 * layer about the error.
621 */
622 ccb->ccb_h.status = CAM_DATA_RUN_ERR;
623 } else {
624 ccb->csio.resid = ecb->status.resid_count;
625
626 if ((ecb->hecb.flag_word1 & FW1_SG_ECB) != 0) {
627 /*
628 * For S/G transfers, the adapter provides a pointer
629 * to the address in the last S/G element used and a
630 * residual for that element. So, we need to sum up
631 * the elements that follow it in order to get a real
632 * residual number. If we have an overrun, the residual
633 * reported will be 0 and we already know that all S/G
634 * segments have been exhausted, so we can skip this
635 * step.
636 */
637 ahb_sg_t *sg;
638 int num_sg;
639
640 num_sg = ecb->hecb.data_len / sizeof(ahb_sg_t);
641
642 /* Find the S/G the adapter was working on */
643 for (sg = ecb->sg_list;
644 num_sg != 0 && sg->addr != ecb->status.resid_addr;
645 num_sg--, sg++)
646 ;
647
648 /* Skip it */
649 num_sg--;
650 sg++;
651
652 /* Sum the rest */
653 for (; num_sg != 0; num_sg--, sg++)
654 ccb->csio.resid += sg->len;
655 }
656 /* Underruns are not errors */
657 ccb->ccb_h.status = CAM_REQ_CMP;
658 }
659 }
660
661 static void
662 ahbprocesserror(struct ahb_softc *ahb, struct ecb *ecb, union ccb *ccb)
663 {
664 struct hardware_ecb *hecb;
665 struct ecb_status *status;
666
667 hecb = &ecb->hecb;
668 status = &ecb->status;
669 switch (status->ha_status) {
670 case HS_OK:
671 ccb->csio.scsi_status = status->scsi_status;
672 if (status->scsi_status != 0) {
673 ccb->ccb_h.status = CAM_SCSI_STATUS_ERROR;
674 if (status->sense_stored) {
675 ccb->ccb_h.status |= CAM_AUTOSNS_VALID;
676 ccb->csio.sense_resid =
677 ccb->csio.sense_len - status->sense_len;
678 bcopy(&ecb->sense, &ccb->csio.sense_data,
679 status->sense_len);
680 }
681 }
682 break;
683 case HS_TARGET_NOT_ASSIGNED:
684 ccb->ccb_h.status = CAM_PATH_INVALID;
685 break;
686 case HS_SEL_TIMEOUT:
687 ccb->ccb_h.status = CAM_SEL_TIMEOUT;
688 break;
689 case HS_DATA_RUN_ERR:
690 ahbcalcresid(ahb, ecb, ccb);
691 break;
692 case HS_UNEXPECTED_BUSFREE:
693 ccb->ccb_h.status = CAM_UNEXP_BUSFREE;
694 break;
695 case HS_INVALID_PHASE:
696 ccb->ccb_h.status = CAM_SEQUENCE_FAIL;
697 break;
698 case HS_REQUEST_SENSE_FAILED:
699 ccb->ccb_h.status = CAM_AUTOSENSE_FAIL;
700 break;
701 case HS_TAG_MSG_REJECTED:
702 {
703 struct ccb_trans_settings neg;
704
705 xpt_print_path(ccb->ccb_h.path);
706 kprintf("refuses tagged commands. Performing "
707 "non-tagged I/O\n");
708 neg.flags = 0;
709 neg.valid = CCB_TRANS_TQ_VALID;
710 xpt_setup_ccb(&neg.ccb_h, ccb->ccb_h.path, /*priority*/1);
711 xpt_async(AC_TRANSFER_NEG, ccb->ccb_h.path, &neg);
712 ahb->tags_permitted &= ~(0x01 << ccb->ccb_h.target_id);
713 ccb->ccb_h.status = CAM_MSG_REJECT_REC;
714 break;
715 }
716 case HS_FIRMWARE_LOAD_REQ:
717 case HS_HARDWARE_ERR:
718 /*
719 * Tell the system that the Adapter
720 * is no longer functional.
721 */
722 ccb->ccb_h.status = CAM_NO_HBA;
723 break;
724 case HS_CMD_ABORTED_HOST:
725 case HS_CMD_ABORTED_ADAPTER:
726 case HS_ATN_TARGET_FAILED:
727 case HS_SCSI_RESET_ADAPTER:
728 case HS_SCSI_RESET_INCOMING:
729 ccb->ccb_h.status = CAM_SCSI_BUS_RESET;
730 break;
731 case HS_INVALID_ECB_PARAM:
732 kprintf("ahb%ld: opcode 0x%02x, flag_word1 0x%02x, flag_word2 0x%02x\n",
733 ahb->unit, hecb->opcode, hecb->flag_word1, hecb->flag_word2);
734 ccb->ccb_h.status = CAM_SCSI_BUS_RESET;
735 break;
736 case HS_DUP_TCB_RECEIVED:
737 case HS_INVALID_OPCODE:
738 case HS_INVALID_CMD_LINK:
739 case HS_PROGRAM_CKSUM_ERROR:
740 panic("ahb%ld: Can't happen host status %x occurred",
741 ahb->unit, status->ha_status);
742 break;
743 }
744 if (ccb->ccb_h.status != CAM_REQ_CMP) {
745 xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
746 ccb->ccb_h.status |= CAM_DEV_QFRZN;
747 }
748 }
749
750 static void
751 ahbdone(struct ahb_softc *ahb, u_int32_t mbox, u_int intstat)
752 {
753 struct ecb *ecb;
754 union ccb *ccb;
755
756 ecb = ahbecbptov(ahb, mbox);
757
758 if ((ecb->state & ECB_ACTIVE) == 0)
759 panic("ecb not active");
760
761 ccb = ecb->ccb;
762
763 if (ccb != NULL) {
764 callout_stop(&ccb->ccb_h.timeout_ch);
765 LIST_REMOVE(&ccb->ccb_h, sim_links.le);
766
767 if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
768 bus_dmasync_op_t op;
769
770 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
771 op = BUS_DMASYNC_POSTREAD;
772 else
773 op = BUS_DMASYNC_POSTWRITE;
774 bus_dmamap_sync(ahb->buffer_dmat, ecb->dmamap, op);
775 bus_dmamap_unload(ahb->buffer_dmat, ecb->dmamap);
776 }
777
778 if ((intstat & INTSTAT_MASK) == INTSTAT_ECB_OK) {
779 ccb->ccb_h.status = CAM_REQ_CMP;
780 ccb->csio.resid = 0;
781 } else {
782 ahbprocesserror(ahb, ecb, ccb);
783 }
784 ahbecbfree(ahb, ecb);
785 xpt_done(ccb);
786 } else {
787 /* Non CCB Command */
788 if ((intstat & INTSTAT_MASK) != INTSTAT_ECB_OK) {
789 kprintf("ahb%ld: Command 0%x Failed %x:%x:%x\n",
790 ahb->unit, ecb->hecb.opcode,
791 *((u_int16_t*)&ecb->status),
792 ecb->status.ha_status, ecb->status.resid_count);
793 }
794 /* Client owns this ECB and will release it. */
795 }
796 }
797
798 /*
799 * Catch an interrupt from the adaptor
800 */
801 static void
802 ahbintr(void *arg)
803 {
804 struct ahb_softc *ahb;
805 u_int intstat;
806 u_int32_t mbox;
807
808 ahb = (struct ahb_softc *)arg;
809
810 while (ahb_inb(ahb, HOSTSTAT) & HOSTSTAT_INTPEND) {
811 /*
812 * Fetch information about this interrupt.
813 */
814 intstat = ahb_inb(ahb, INTSTAT);
815 mbox = ahb_inl(ahb, MBOXIN0);
816
817 /*
818 * Reset interrupt latch.
819 */
820 ahb_outb(ahb, CONTROL, CNTRL_CLRINT);
821
822 /*
823 * Process the completed operation
824 */
825 switch (intstat & INTSTAT_MASK) {
826 case INTSTAT_ECB_OK:
827 case INTSTAT_ECB_CMPWRETRY:
828 case INTSTAT_ECB_CMPWERR:
829 ahbdone(ahb, mbox, intstat);
830 break;
831 case INTSTAT_AEN_OCCURED:
832 if ((intstat & INTSTAT_TARGET_MASK) == ahb->scsi_id) {
833 /* Bus Reset */
834 xpt_print_path(ahb->path);
835 switch (mbox) {
836 case HS_SCSI_RESET_ADAPTER:
837 kprintf("Host Adapter Initiated "
838 "Bus Reset occurred\n");
839 break;
840 case HS_SCSI_RESET_INCOMING:
841 kprintf("Bus Reset Initiated "
842 "by another device occurred\n");
843 break;
844 }
845 /* Notify the XPT */
846 xpt_async(AC_BUS_RESET, ahb->path, NULL);
847 break;
848 }
849 kprintf("Unsupported initiator selection AEN occurred\n");
850 break;
851 case INTSTAT_IMMED_OK:
852 case INTSTAT_IMMED_ERR:
853 ahbhandleimmed(ahb, mbox, intstat);
854 break;
855 case INTSTAT_HW_ERR:
856 panic("Unrecoverable hardware Error Occurred\n");
857 }
858 }
859 }
860
861 static void
862 ahbexecuteecb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
863 {
864 struct ecb *ecb;
865 union ccb *ccb;
866 struct ahb_softc *ahb;
867 u_int32_t ecb_paddr;
868
869 ecb = (struct ecb *)arg;
870 ccb = ecb->ccb;
871 ahb = (struct ahb_softc *)ccb->ccb_h.ccb_ahb_ptr;
872
873 if (error != 0) {
874 if (error != EFBIG)
875 kprintf("ahb%ld: Unexpected error 0x%x returned from "
876 "bus_dmamap_load\n", ahb->unit, error);
877 if (ccb->ccb_h.status == CAM_REQ_INPROG) {
878 xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
879 ccb->ccb_h.status = CAM_REQ_TOO_BIG|CAM_DEV_QFRZN;
880 }
881 ahbecbfree(ahb, ecb);
882 xpt_done(ccb);
883 return;
884 }
885
886 ecb_paddr = ahbecbvtop(ahb, ecb);
887
888 if (nseg != 0) {
889 ahb_sg_t *sg;
890 bus_dma_segment_t *end_seg;
891 bus_dmasync_op_t op;
892
893 end_seg = dm_segs + nseg;
894
895 /* Copy the segments into our SG list */
896 sg = ecb->sg_list;
897 while (dm_segs < end_seg) {
898 sg->addr = dm_segs->ds_addr;
899 sg->len = dm_segs->ds_len;
900 sg++;
901 dm_segs++;
902 }
903
904 if (nseg > 1) {
905 ecb->hecb.flag_word1 |= FW1_SG_ECB;
906 ecb->hecb.data_ptr = ahbsgpaddr(ecb_paddr);
907 ecb->hecb.data_len = sizeof(ahb_sg_t) * nseg;
908 } else {
909 ecb->hecb.data_ptr = ecb->sg_list->addr;
910 ecb->hecb.data_len = ecb->sg_list->len;
911 }
912
913 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) {
914 /* ecb->hecb.flag_word2 |= FW2_DATA_DIR_IN; */
915 op = BUS_DMASYNC_PREREAD;
916 } else {
917 op = BUS_DMASYNC_PREWRITE;
918 }
919 /* ecb->hecb.flag_word2 |= FW2_CHECK_DATA_DIR; */
920
921 bus_dmamap_sync(ahb->buffer_dmat, ecb->dmamap, op);
922
923 } else {
924 ecb->hecb.data_ptr = 0;
925 ecb->hecb.data_len = 0;
926 }
927
928 crit_enter();
929
930 /*
931 * Last time we need to check if this CCB needs to
932 * be aborted.
933 */
934 if (ccb->ccb_h.status != CAM_REQ_INPROG) {
935 if (nseg != 0)
936 bus_dmamap_unload(ahb->buffer_dmat, ecb->dmamap);
937 ahbecbfree(ahb, ecb);
938 xpt_done(ccb);
939 crit_exit();
940 return;
941 }
942
943 ecb->state = ECB_ACTIVE;
944 ccb->ccb_h.status |= CAM_SIM_QUEUED;
945 LIST_INSERT_HEAD(&ahb->pending_ccbs, &ccb->ccb_h, sim_links.le);
946
947 /* Tell the adapter about this command */
948 ahbqueuembox(ahb, ecb_paddr, ATTN_STARTECB|ccb->ccb_h.target_id);
949
950 callout_reset(&ccb->ccb_h.timeout_ch, (ccb->ccb_h.timeout * hz) / 1000,
951 ahbtimeout, ecb);
952 crit_exit();
953 }
954
955 static void
956 ahbaction(struct cam_sim *sim, union ccb *ccb)
957 {
958 struct ahb_softc *ahb;
959
960 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("ahbaction\n"));
961
962 ahb = (struct ahb_softc *)cam_sim_softc(sim);
963
964 switch (ccb->ccb_h.func_code) {
965 /* Common cases first */
966 case XPT_SCSI_IO: /* Execute the requested I/O operation */
967 {
968 struct ecb *ecb;
969 struct hardware_ecb *hecb;
970
971 /*
972 * get an ecb to use.
973 */
974 if ((ecb = ahbecbget(ahb)) == NULL) {
975 /* Should never occur */
976 panic("Failed to get an ecb");
977 }
978
979 /*
980 * So we can find the ECB when an abort is requested
981 */
982 ecb->ccb = ccb;
983 ccb->ccb_h.ccb_ecb_ptr = ecb;
984 ccb->ccb_h.ccb_ahb_ptr = ahb;
985
986 /*
987 * Put all the arguments for the xfer in the ecb
988 */
989 hecb = &ecb->hecb;
990 hecb->opcode = ECBOP_INITIATOR_SCSI_CMD;
991 hecb->flag_word1 = FW1_AUTO_REQUEST_SENSE
992 | FW1_ERR_STATUS_BLK_ONLY;
993 hecb->flag_word2 = ccb->ccb_h.target_lun
994 | FW2_NO_RETRY_ON_BUSY;
995 if ((ccb->ccb_h.flags & CAM_TAG_ACTION_VALID) != 0) {
996 hecb->flag_word2 |= FW2_TAG_ENB
997 | ((ccb->csio.tag_action & 0x3)
998 << FW2_TAG_TYPE_SHIFT);
999 }
1000 if ((ccb->ccb_h.flags & CAM_DIS_DISCONNECT) != 0)
1001 hecb->flag_word2 |= FW2_DISABLE_DISC;
1002 hecb->sense_len = ccb->csio.sense_len;
1003 hecb->cdb_len = ccb->csio.cdb_len;
1004 if ((ccb->ccb_h.flags & CAM_CDB_POINTER) != 0) {
1005 if ((ccb->ccb_h.flags & CAM_CDB_PHYS) == 0) {
1006 bcopy(ccb->csio.cdb_io.cdb_ptr,
1007 hecb->cdb, hecb->cdb_len);
1008 } else {
1009 /* I guess I could map it in... */
1010 ccb->ccb_h.status = CAM_REQ_INVALID;
1011 ahbecbfree(ahb, ecb);
1012 xpt_done(ccb);
1013 return;
1014 }
1015 } else {
1016 bcopy(ccb->csio.cdb_io.cdb_bytes,
1017 hecb->cdb, hecb->cdb_len);
1018 }
1019
1020 /*
1021 * If we have any data to send with this command,
1022 * map it into bus space.
1023 */
1024 if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
1025 if ((ccb->ccb_h.flags & CAM_SCATTER_VALID) == 0) {
1026 /*
1027 * We've been given a pointer
1028 * to a single buffer.
1029 */
1030 if ((ccb->ccb_h.flags & CAM_DATA_PHYS)==0) {
1031 int error;
1032
1033 crit_enter();
1034 error = bus_dmamap_load(
1035 ahb->buffer_dmat,
1036 ecb->dmamap,
1037 ccb->csio.data_ptr,
1038 ccb->csio.dxfer_len,
1039 ahbexecuteecb,
1040 ecb, /*flags*/0);
1041 if (error == EINPROGRESS) {
1042 /*
1043 * So as to maintain ordering,
1044 * freeze the controller queue
1045 * until our mapping is
1046 * returned.
1047 */
1048 xpt_freeze_simq(ahb->sim, 1);
1049 ccb->ccb_h.status |=
1050 CAM_RELEASE_SIMQ;
1051 }
1052 crit_exit();
1053 } else {
1054 struct bus_dma_segment seg;
1055
1056 /* Pointer to physical buffer */
1057 seg.ds_addr =
1058 (bus_addr_t)ccb->csio.data_ptr;
1059 seg.ds_len = ccb->csio.dxfer_len;
1060 ahbexecuteecb(ecb, &seg, 1, 0);
1061 }
1062 } else {
1063 struct bus_dma_segment *segs;
1064
1065 if ((ccb->ccb_h.flags & CAM_DATA_PHYS) != 0)
1066 panic("ahbaction - Physical segment "
1067 "pointers unsupported");
1068
1069 if ((ccb->ccb_h.flags & CAM_SG_LIST_PHYS) == 0)
1070 panic("btaction - Virtual segment "
1071 "addresses unsupported");
1072
1073 /* Just use the segments provided */
1074 segs = (struct bus_dma_segment *)
1075 ccb->csio.data_ptr;
1076 ahbexecuteecb(ecb, segs, ccb->csio.sglist_cnt,
1077 0);
1078 }
1079 } else {
1080 ahbexecuteecb(ecb, NULL, 0, 0);
1081 }
1082 break;
1083 }
1084 case XPT_EN_LUN: /* Enable LUN as a target */
1085 case XPT_TARGET_IO: /* Execute target I/O request */
1086 case XPT_ACCEPT_TARGET_IO: /* Accept Host Target Mode CDB */
1087 case XPT_CONT_TARGET_IO: /* Continue Host Target I/O Connection*/
1088 case XPT_ABORT: /* Abort the specified CCB */
1089 /* XXX Implement */
1090 ccb->ccb_h.status = CAM_REQ_INVALID;
1091 xpt_done(ccb);
1092 break;
1093 case XPT_SET_TRAN_SETTINGS:
1094 {
1095 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
1096 xpt_done(ccb);
1097 break;
1098 }
1099 case XPT_GET_TRAN_SETTINGS:
1100 /* Get default/user set transfer settings for the target */
1101 {
1102 struct ccb_trans_settings *cts;
1103 u_int target_mask;
1104
1105 cts = &ccb->cts;
1106 target_mask = 0x01 << ccb->ccb_h.target_id;
1107 if ((cts->flags & CCB_TRANS_USER_SETTINGS) != 0) {
1108 cts->flags = 0;
1109 if ((ahb->disc_permitted & target_mask) != 0)
1110 cts->flags |= CCB_TRANS_DISC_ENB;
1111 if ((ahb->tags_permitted & target_mask) != 0)
1112 cts->flags |= CCB_TRANS_TAG_ENB;
1113 cts->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
1114 cts->sync_period = 25; /* 10MHz */
1115
1116 if (cts->sync_period != 0)
1117 cts->sync_offset = 15;
1118
1119 cts->valid = CCB_TRANS_SYNC_RATE_VALID
1120 | CCB_TRANS_SYNC_OFFSET_VALID
1121 | CCB_TRANS_BUS_WIDTH_VALID
1122 | CCB_TRANS_DISC_VALID
1123 | CCB_TRANS_TQ_VALID;
1124 ccb->ccb_h.status = CAM_REQ_CMP;
1125 } else {
1126 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
1127 }
1128 xpt_done(ccb);
1129 break;
1130 }
1131 case XPT_RESET_DEV: /* Bus Device Reset the specified SCSI device */
1132 {
1133 int i;
1134
1135 crit_enter();
1136 ahb->immed_cmd = IMMED_RESET;
1137 ahbqueuembox(ahb, IMMED_RESET, ATTN_IMMED|ccb->ccb_h.target_id);
1138 /* Poll for interrupt completion */
1139 for (i = 1000; ahb->immed_cmd != 0 && i != 0; i--) {
1140 DELAY(1000);
1141 ahbintr(cam_sim_softc(sim));
1142 }
1143 crit_exit();
1144 break;
1145 }
1146 case XPT_CALC_GEOMETRY:
1147 {
1148 struct ccb_calc_geometry *ccg;
1149 u_int32_t size_mb;
1150 u_int32_t secs_per_cylinder;
1151
1152 ccg = &ccb->ccg;
1153 size_mb = ccg->volume_size
1154 / ((1024L * 1024L) / ccg->block_size);
1155
1156 if (size_mb > 1024 && (ahb->extended_trans != 0)) {
1157 ccg->heads = 255;
1158 ccg->secs_per_track = 63;
1159 } else {
1160 ccg->heads = 64;
1161 ccg->secs_per_track = 32;
1162 }
1163 secs_per_cylinder = ccg->heads * ccg->secs_per_track;
1164 ccg->cylinders = ccg->volume_size / secs_per_cylinder;
1165 ccb->ccb_h.status = CAM_REQ_CMP;
1166 xpt_done(ccb);
1167 break;
1168 }
1169 case XPT_RESET_BUS: /* Reset the specified SCSI bus */
1170 {
1171 int i;
1172
1173 ahb->immed_cmd = IMMED_RESET;
1174 ahbqueuembox(ahb, IMMED_RESET, ATTN_IMMED|ahb->scsi_id);
1175 /* Poll for interrupt completion */
1176 for (i = 1000; ahb->immed_cmd != 0 && i != 0; i--)
1177 DELAY(1000);
1178 ccb->ccb_h.status = CAM_REQ_CMP;
1179 xpt_done(ccb);
1180 break;
1181 }
1182 case XPT_TERM_IO: /* Terminate the I/O process */
1183 /* XXX Implement */
1184 ccb->ccb_h.status = CAM_REQ_INVALID;
1185 xpt_done(ccb);
1186 break;
1187 case XPT_PATH_INQ: /* Path routing inquiry */
1188 {
1189 struct ccb_pathinq *cpi = &ccb->cpi;
1190
1191 cpi->version_num = 1; /* XXX??? */
1192 cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE;
1193 cpi->target_sprt = 0;
1194 cpi->hba_misc = 0;
1195 cpi->hba_eng_cnt = 0;
1196 cpi->max_target = 7;
1197 cpi->max_lun = 7;
1198 cpi->initiator_id = ahb->scsi_id;
1199 cpi->bus_id = cam_sim_bus(sim);
1200 cpi->base_transfer_speed = 3300;
1201 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
1202 strncpy(cpi->hba_vid, "Adaptec", HBA_IDLEN);
1203 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
1204 cpi->unit_number = cam_sim_unit(sim);
1205 cpi->ccb_h.status = CAM_REQ_CMP;
1206 xpt_done(ccb);
1207 break;
1208 }
1209 #if 0
1210 /* Need these??? */
1211 case XPT_IMMED_NOTIFY: /* Notify Host Target driver of event */
1212 case XPT_NOTIFY_ACK: /* Acknowledgement of event */
1213 #endif
1214 default:
1215 ccb->ccb_h.status = CAM_REQ_INVALID;
1216 xpt_done(ccb);
1217 break;
1218 }
1219 }
1220
1221 static void
1222 ahbpoll(struct cam_sim *sim)
1223 {
1224 ahbintr(cam_sim_softc(sim));
1225 }
1226
1227 static void
1228 ahbtimeout(void *arg)
1229 {
1230 struct ecb *ecb;
1231 union ccb *ccb;
1232 struct ahb_softc *ahb;
1233
1234 ecb = (struct ecb *)arg;
1235 ccb = ecb->ccb;
1236 ahb = (struct ahb_softc *)ccb->ccb_h.ccb_ahb_ptr;
1237 xpt_print_path(ccb->ccb_h.path);
1238 kprintf("ECB %p - timed out\n", (void *)ecb);
1239
1240 crit_enter();
1241
1242 if ((ecb->state & ECB_ACTIVE) == 0) {
1243 xpt_print_path(ccb->ccb_h.path);
1244 kprintf("ECB %p - timed out ECB already completed\n",
1245 (void *)ecb);
1246 crit_exit();
1247 return;
1248 }
1249 /*
1250 * In order to simplify the recovery process, we ask the XPT
1251 * layer to halt the queue of new transactions and we traverse
1252 * the list of pending CCBs and remove their timeouts. This
1253 * means that the driver attempts to clear only one error
1254 * condition at a time. In general, timeouts that occur
1255 * close together are related anyway, so there is no benefit
1256 * in attempting to handle errors in parrallel. Timeouts will
1257 * be reinstated when the recovery process ends.
1258 */
1259 if ((ecb->state & ECB_DEVICE_RESET) == 0) {
1260 struct ccb_hdr *ccb_h;
1261
1262 if ((ecb->state & ECB_RELEASE_SIMQ) == 0) {
1263 xpt_freeze_simq(ahb->sim, /*count*/1);
1264 ecb->state |= ECB_RELEASE_SIMQ;
1265 }
1266
1267 ccb_h = LIST_FIRST(&ahb->pending_ccbs);
1268 while (ccb_h != NULL) {
1269 struct ecb *pending_ecb;
1270
1271 pending_ecb = (struct ecb *)ccb_h->ccb_ecb_ptr;
1272 callout_stop(&ccb_h->timeout_ch);
1273 ccb_h = LIST_NEXT(ccb_h, sim_links.le);
1274 }
1275
1276 /* Store for our interrupt handler */
1277 ahb->immed_ecb = ecb;
1278
1279 /*
1280 * Send a Bus Device Reset message:
1281 * The target that is holding up the bus may not
1282 * be the same as the one that triggered this timeout
1283 * (different commands have different timeout lengths),
1284 * but we have no way of determining this from our
1285 * timeout handler. Our strategy here is to queue a
1286 * BDR message to the target of the timed out command.
1287 * If this fails, we'll get another timeout 2 seconds
1288 * later which will attempt a bus reset.
1289 */
1290 xpt_print_path(ccb->ccb_h.path);
1291 kprintf("Queuing BDR\n");
1292 ecb->state |= ECB_DEVICE_RESET;
1293 callout_reset(&ccb->ccb_h.timeout_ch, 2 * hz, ahbtimeout, ecb);
1294
1295 ahb->immed_cmd = IMMED_RESET;
1296 ahbqueuembox(ahb, IMMED_RESET, ATTN_IMMED|ccb->ccb_h.target_id);
1297 } else if ((ecb->state & ECB_SCSIBUS_RESET) != 0) {
1298 /*
1299 * Try a SCSI bus reset. We do this only if we
1300 * have already attempted to clear the condition with a BDR.
1301 */
1302 xpt_print_path(ccb->ccb_h.path);
1303 kprintf("Attempting SCSI Bus reset\n");
1304 ecb->state |= ECB_SCSIBUS_RESET;
1305 callout_reset(&ccb->ccb_h.timeout_ch, 2 * hz, ahbtimeout, ecb);
1306 ahb->immed_cmd = IMMED_RESET;
1307 ahbqueuembox(ahb, IMMED_RESET, ATTN_IMMED|ahb->scsi_id);
1308 } else {
1309 /* Bring out the hammer... */
1310 ahbreset(ahb);
1311
1312 /* Simulate the reset complete interrupt */
1313 ahbhandleimmed(ahb, 0, ahb->scsi_id|INTSTAT_IMMED_OK);
1314 }
1315
1316 crit_exit();
1317 }
1318
1319 static device_method_t ahb_eisa_methods[] = {
1320 /* Device interface */
1321 DEVMETHOD(device_probe, ahbprobe),
1322 DEVMETHOD(device_attach, ahbattach),
1323
1324 { 0, 0 }
1325 };
1326
1327 static driver_t ahb_eisa_driver = {
1328 "ahb",
1329 ahb_eisa_methods,
1330 1, /* unused */
1331 };
1332
1333 static devclass_t ahb_devclass;
1334
1335 DRIVER_MODULE(ahb, eisa, ahb_eisa_driver, ahb_devclass, 0, 0);
DragonFly BSD