1 /*-
2 * Copyright (c) 1999 Michael Smith
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: stable/10/sys/dev/mlx/mlx.c 281826 2015-04-21 11:27:50Z mav $
27 */
28
29 /*
30 * Driver for the Mylex DAC960 family of RAID controllers.
31 */
32
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/bio.h>
36 #include <sys/lock.h>
37 #include <sys/malloc.h>
38 #include <sys/mutex.h>
39 #include <sys/kernel.h>
40 #include <sys/sx.h>
41
42 #include <sys/bus.h>
43 #include <sys/conf.h>
44 #include <sys/stat.h>
45
46 #include <machine/resource.h>
47 #include <machine/bus.h>
48 #include <machine/clock.h>
49 #include <sys/rman.h>
50
51 #include <geom/geom_disk.h>
52
53 #include <dev/mlx/mlxio.h>
54 #include <dev/mlx/mlxvar.h>
55 #include <dev/mlx/mlxreg.h>
56
57 static struct cdevsw mlx_cdevsw = {
58 .d_version = D_VERSION,
59 .d_open = mlx_open,
60 .d_close = mlx_close,
61 .d_ioctl = mlx_ioctl,
62 .d_name = "mlx",
63 };
64
65 devclass_t mlx_devclass;
66
67 /*
68 * Per-interface accessor methods
69 */
70 static int mlx_v3_tryqueue(struct mlx_softc *sc, struct mlx_command *mc);
71 static int mlx_v3_findcomplete(struct mlx_softc *sc, u_int8_t *slot, u_int16_t *status);
72 static void mlx_v3_intaction(struct mlx_softc *sc, int action);
73 static int mlx_v3_fw_handshake(struct mlx_softc *sc, int *error, int *param1, int *param2, int first);
74
75 static int mlx_v4_tryqueue(struct mlx_softc *sc, struct mlx_command *mc);
76 static int mlx_v4_findcomplete(struct mlx_softc *sc, u_int8_t *slot, u_int16_t *status);
77 static void mlx_v4_intaction(struct mlx_softc *sc, int action);
78 static int mlx_v4_fw_handshake(struct mlx_softc *sc, int *error, int *param1, int *param2, int first);
79
80 static int mlx_v5_tryqueue(struct mlx_softc *sc, struct mlx_command *mc);
81 static int mlx_v5_findcomplete(struct mlx_softc *sc, u_int8_t *slot, u_int16_t *status);
82 static void mlx_v5_intaction(struct mlx_softc *sc, int action);
83 static int mlx_v5_fw_handshake(struct mlx_softc *sc, int *error, int *param1, int *param2, int first);
84
85 /*
86 * Status monitoring
87 */
88 static void mlx_periodic(void *data);
89 static void mlx_periodic_enquiry(struct mlx_command *mc);
90 static void mlx_periodic_eventlog_poll(struct mlx_softc *sc);
91 static void mlx_periodic_eventlog_respond(struct mlx_command *mc);
92 static void mlx_periodic_rebuild(struct mlx_command *mc);
93
94 /*
95 * Channel Pause
96 */
97 static void mlx_pause_action(struct mlx_softc *sc);
98 static void mlx_pause_done(struct mlx_command *mc);
99
100 /*
101 * Command submission.
102 */
103 static void *mlx_enquire(struct mlx_softc *sc, int command, size_t bufsize,
104 void (*complete)(struct mlx_command *mc));
105 static int mlx_flush(struct mlx_softc *sc);
106 static int mlx_check(struct mlx_softc *sc, int drive);
107 static int mlx_rebuild(struct mlx_softc *sc, int channel, int target);
108 static int mlx_wait_command(struct mlx_command *mc);
109 static int mlx_poll_command(struct mlx_command *mc);
110 void mlx_startio_cb(void *arg,
111 bus_dma_segment_t *segs,
112 int nsegments, int error);
113 static void mlx_startio(struct mlx_softc *sc);
114 static void mlx_completeio(struct mlx_command *mc);
115 static int mlx_user_command(struct mlx_softc *sc,
116 struct mlx_usercommand *mu);
117 void mlx_user_cb(void *arg, bus_dma_segment_t *segs,
118 int nsegments, int error);
119
120 /*
121 * Command buffer allocation.
122 */
123 static struct mlx_command *mlx_alloccmd(struct mlx_softc *sc);
124 static void mlx_releasecmd(struct mlx_command *mc);
125 static void mlx_freecmd(struct mlx_command *mc);
126
127 /*
128 * Command management.
129 */
130 static int mlx_getslot(struct mlx_command *mc);
131 static void mlx_setup_dmamap(struct mlx_command *mc,
132 bus_dma_segment_t *segs,
133 int nsegments, int error);
134 static void mlx_unmapcmd(struct mlx_command *mc);
135 static int mlx_shutdown_locked(struct mlx_softc *sc);
136 static int mlx_start(struct mlx_command *mc);
137 static int mlx_done(struct mlx_softc *sc, int startio);
138 static void mlx_complete(struct mlx_softc *sc);
139
140 /*
141 * Debugging.
142 */
143 static char *mlx_diagnose_command(struct mlx_command *mc);
144 static void mlx_describe_controller(struct mlx_softc *sc);
145 static int mlx_fw_message(struct mlx_softc *sc, int status, int param1, int param2);
146
147 /*
148 * Utility functions.
149 */
150 static struct mlx_sysdrive *mlx_findunit(struct mlx_softc *sc, int unit);
151
152 /********************************************************************************
153 ********************************************************************************
154 Public Interfaces
155 ********************************************************************************
156 ********************************************************************************/
157
158 /********************************************************************************
159 * Free all of the resources associated with (sc)
160 *
161 * Should not be called if the controller is active.
162 */
163 void
mlx_free(struct mlx_softc * sc)164 mlx_free(struct mlx_softc *sc)
165 {
166 struct mlx_command *mc;
167
168 debug_called(1);
169
170 /* destroy control device */
171 if (sc->mlx_dev_t != NULL)
172 destroy_dev(sc->mlx_dev_t);
173
174 if (sc->mlx_intr)
175 bus_teardown_intr(sc->mlx_dev, sc->mlx_irq, sc->mlx_intr);
176
177 /* cancel status timeout */
178 MLX_IO_LOCK(sc);
179 callout_stop(&sc->mlx_timeout);
180
181 /* throw away any command buffers */
182 while ((mc = TAILQ_FIRST(&sc->mlx_freecmds)) != NULL) {
183 TAILQ_REMOVE(&sc->mlx_freecmds, mc, mc_link);
184 mlx_freecmd(mc);
185 }
186 MLX_IO_UNLOCK(sc);
187 callout_drain(&sc->mlx_timeout);
188
189 /* destroy data-transfer DMA tag */
190 if (sc->mlx_buffer_dmat)
191 bus_dma_tag_destroy(sc->mlx_buffer_dmat);
192
193 /* free and destroy DMA memory and tag for s/g lists */
194 if (sc->mlx_sgtable)
195 bus_dmamem_free(sc->mlx_sg_dmat, sc->mlx_sgtable, sc->mlx_sg_dmamap);
196 if (sc->mlx_sg_dmat)
197 bus_dma_tag_destroy(sc->mlx_sg_dmat);
198
199 /* disconnect the interrupt handler */
200 if (sc->mlx_irq != NULL)
201 bus_release_resource(sc->mlx_dev, SYS_RES_IRQ, 0, sc->mlx_irq);
202
203 /* destroy the parent DMA tag */
204 if (sc->mlx_parent_dmat)
205 bus_dma_tag_destroy(sc->mlx_parent_dmat);
206
207 /* release the register window mapping */
208 if (sc->mlx_mem != NULL)
209 bus_release_resource(sc->mlx_dev, sc->mlx_mem_type, sc->mlx_mem_rid, sc->mlx_mem);
210
211 /* free controller enquiry data */
212 if (sc->mlx_enq2 != NULL)
213 free(sc->mlx_enq2, M_DEVBUF);
214
215 sx_destroy(&sc->mlx_config_lock);
216 mtx_destroy(&sc->mlx_io_lock);
217 }
218
219 /********************************************************************************
220 * Map the scatter/gather table into bus space
221 */
222 static void
mlx_dma_map_sg(void * arg,bus_dma_segment_t * segs,int nseg,int error)223 mlx_dma_map_sg(void *arg, bus_dma_segment_t *segs, int nseg, int error)
224 {
225 struct mlx_softc *sc = (struct mlx_softc *)arg;
226
227 debug_called(1);
228
229 /* save base of s/g table's address in bus space */
230 sc->mlx_sgbusaddr = segs->ds_addr;
231 }
232
233 static int
mlx_sglist_map(struct mlx_softc * sc)234 mlx_sglist_map(struct mlx_softc *sc)
235 {
236 size_t segsize;
237 int error, ncmd;
238
239 debug_called(1);
240
241 /* destroy any existing mappings */
242 if (sc->mlx_sgtable)
243 bus_dmamem_free(sc->mlx_sg_dmat, sc->mlx_sgtable, sc->mlx_sg_dmamap);
244 if (sc->mlx_sg_dmat)
245 bus_dma_tag_destroy(sc->mlx_sg_dmat);
246
247 /*
248 * Create a single tag describing a region large enough to hold all of
249 * the s/g lists we will need. If we're called early on, we don't know how
250 * many commands we're going to be asked to support, so only allocate enough
251 * for a couple.
252 */
253 if (sc->mlx_enq2 == NULL) {
254 ncmd = 2;
255 } else {
256 ncmd = sc->mlx_enq2->me_max_commands;
257 }
258 segsize = sizeof(struct mlx_sgentry) * MLX_NSEG * ncmd;
259 error = bus_dma_tag_create(sc->mlx_parent_dmat, /* parent */
260 1, 0, /* alignment,boundary */
261 BUS_SPACE_MAXADDR, /* lowaddr */
262 BUS_SPACE_MAXADDR, /* highaddr */
263 NULL, NULL, /* filter, filterarg */
264 segsize, 1, /* maxsize, nsegments */
265 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
266 0, /* flags */
267 NULL, NULL, /* lockfunc, lockarg */
268 &sc->mlx_sg_dmat);
269 if (error != 0) {
270 device_printf(sc->mlx_dev, "can't allocate scatter/gather DMA tag\n");
271 return(ENOMEM);
272 }
273
274 /*
275 * Allocate enough s/g maps for all commands and permanently map them into
276 * controller-visible space.
277 *
278 * XXX this assumes we can get enough space for all the s/g maps in one
279 * contiguous slab. We may need to switch to a more complex arrangement
280 * where we allocate in smaller chunks and keep a lookup table from slot
281 * to bus address.
282 */
283 error = bus_dmamem_alloc(sc->mlx_sg_dmat, (void **)&sc->mlx_sgtable,
284 BUS_DMA_NOWAIT, &sc->mlx_sg_dmamap);
285 if (error) {
286 device_printf(sc->mlx_dev, "can't allocate s/g table\n");
287 return(ENOMEM);
288 }
289 (void)bus_dmamap_load(sc->mlx_sg_dmat, sc->mlx_sg_dmamap, sc->mlx_sgtable,
290 segsize, mlx_dma_map_sg, sc, 0);
291 return(0);
292 }
293
294 /********************************************************************************
295 * Initialise the controller and softc
296 */
297 int
mlx_attach(struct mlx_softc * sc)298 mlx_attach(struct mlx_softc *sc)
299 {
300 struct mlx_enquiry_old *meo;
301 int rid, error, fwminor, hscode, hserror, hsparam1, hsparam2, hsmsg;
302
303 debug_called(1);
304
305 /*
306 * Initialise per-controller queues.
307 */
308 TAILQ_INIT(&sc->mlx_work);
309 TAILQ_INIT(&sc->mlx_freecmds);
310 bioq_init(&sc->mlx_bioq);
311
312 /*
313 * Select accessor methods based on controller interface type.
314 */
315 switch(sc->mlx_iftype) {
316 case MLX_IFTYPE_2:
317 case MLX_IFTYPE_3:
318 sc->mlx_tryqueue = mlx_v3_tryqueue;
319 sc->mlx_findcomplete = mlx_v3_findcomplete;
320 sc->mlx_intaction = mlx_v3_intaction;
321 sc->mlx_fw_handshake = mlx_v3_fw_handshake;
322 break;
323 case MLX_IFTYPE_4:
324 sc->mlx_tryqueue = mlx_v4_tryqueue;
325 sc->mlx_findcomplete = mlx_v4_findcomplete;
326 sc->mlx_intaction = mlx_v4_intaction;
327 sc->mlx_fw_handshake = mlx_v4_fw_handshake;
328 break;
329 case MLX_IFTYPE_5:
330 sc->mlx_tryqueue = mlx_v5_tryqueue;
331 sc->mlx_findcomplete = mlx_v5_findcomplete;
332 sc->mlx_intaction = mlx_v5_intaction;
333 sc->mlx_fw_handshake = mlx_v5_fw_handshake;
334 break;
335 default:
336 return(ENXIO); /* should never happen */
337 }
338
339 /* disable interrupts before we start talking to the controller */
340 MLX_IO_LOCK(sc);
341 sc->mlx_intaction(sc, MLX_INTACTION_DISABLE);
342 MLX_IO_UNLOCK(sc);
343
344 /*
345 * Wait for the controller to come ready, handshake with the firmware if required.
346 * This is typically only necessary on platforms where the controller BIOS does not
347 * run.
348 */
349 hsmsg = 0;
350 DELAY(1000);
351 while ((hscode = sc->mlx_fw_handshake(sc, &hserror, &hsparam1, &hsparam2,
352 hsmsg == 0)) != 0) {
353 /* report first time around... */
354 if (hsmsg == 0) {
355 device_printf(sc->mlx_dev, "controller initialisation in progress...\n");
356 hsmsg = 1;
357 }
358 /* did we get a real message? */
359 if (hscode == 2) {
360 hscode = mlx_fw_message(sc, hserror, hsparam1, hsparam2);
361 /* fatal initialisation error? */
362 if (hscode != 0) {
363 return(ENXIO);
364 }
365 }
366 }
367 if (hsmsg == 1)
368 device_printf(sc->mlx_dev, "initialisation complete.\n");
369
370 /*
371 * Allocate and connect our interrupt.
372 */
373 rid = 0;
374 sc->mlx_irq = bus_alloc_resource_any(sc->mlx_dev, SYS_RES_IRQ, &rid,
375 RF_SHAREABLE | RF_ACTIVE);
376 if (sc->mlx_irq == NULL) {
377 device_printf(sc->mlx_dev, "can't allocate interrupt\n");
378 return(ENXIO);
379 }
380 error = bus_setup_intr(sc->mlx_dev, sc->mlx_irq, INTR_TYPE_BIO |
381 INTR_ENTROPY | INTR_MPSAFE, NULL, mlx_intr, sc, &sc->mlx_intr);
382 if (error) {
383 device_printf(sc->mlx_dev, "can't set up interrupt\n");
384 return(ENXIO);
385 }
386
387 /*
388 * Create DMA tag for mapping buffers into controller-addressable space.
389 */
390 error = bus_dma_tag_create(sc->mlx_parent_dmat, /* parent */
391 1, 0, /* align, boundary */
392 BUS_SPACE_MAXADDR, /* lowaddr */
393 BUS_SPACE_MAXADDR, /* highaddr */
394 NULL, NULL, /* filter, filterarg */
395 MLX_MAXPHYS, /* maxsize */
396 MLX_NSEG, /* nsegments */
397 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
398 0, /* flags */
399 busdma_lock_mutex, /* lockfunc */
400 &sc->mlx_io_lock, /* lockarg */
401 &sc->mlx_buffer_dmat);
402 if (error != 0) {
403 device_printf(sc->mlx_dev, "can't allocate buffer DMA tag\n");
404 return(ENOMEM);
405 }
406
407 /*
408 * Create some initial scatter/gather mappings so we can run the probe
409 * commands.
410 */
411 error = mlx_sglist_map(sc);
412 if (error != 0) {
413 device_printf(sc->mlx_dev, "can't make initial s/g list mapping\n");
414 return(error);
415 }
416
417 /*
418 * We don't (yet) know where the event log is up to.
419 */
420 sc->mlx_currevent = -1;
421
422 /*
423 * Obtain controller feature information
424 */
425 MLX_IO_LOCK(sc);
426 if ((sc->mlx_enq2 = mlx_enquire(sc, MLX_CMD_ENQUIRY2, sizeof(struct mlx_enquiry2), NULL)) == NULL) {
427 MLX_IO_UNLOCK(sc);
428 device_printf(sc->mlx_dev, "ENQUIRY2 failed\n");
429 return(ENXIO);
430 }
431
432 /*
433 * Do quirk/feature related things.
434 */
435 fwminor = (sc->mlx_enq2->me_firmware_id >> 8) & 0xff;
436 switch(sc->mlx_iftype) {
437 case MLX_IFTYPE_2:
438 /* These controllers don't report the firmware version in the ENQUIRY2 response */
439 if ((meo = mlx_enquire(sc, MLX_CMD_ENQUIRY_OLD, sizeof(struct mlx_enquiry_old), NULL)) == NULL) {
440 MLX_IO_UNLOCK(sc);
441 device_printf(sc->mlx_dev, "ENQUIRY_OLD failed\n");
442 return(ENXIO);
443 }
444 sc->mlx_enq2->me_firmware_id = ('0' << 24) | (0 << 16) | (meo->me_fwminor << 8) | meo->me_fwmajor;
445
446 /* XXX require 2.42 or better (PCI) or 2.14 or better (EISA) */
447 if (meo->me_fwminor < 42) {
448 device_printf(sc->mlx_dev, " *** WARNING *** This firmware revision is not recommended\n");
449 device_printf(sc->mlx_dev, " *** WARNING *** Use revision 2.42 or later\n");
450 }
451 free(meo, M_DEVBUF);
452 break;
453 case MLX_IFTYPE_3:
454 /* XXX certify 3.52? */
455 if (fwminor < 51) {
456 device_printf(sc->mlx_dev, " *** WARNING *** This firmware revision is not recommended\n");
457 device_printf(sc->mlx_dev, " *** WARNING *** Use revision 3.51 or later\n");
458 }
459 break;
460 case MLX_IFTYPE_4:
461 /* XXX certify firmware versions? */
462 if (fwminor < 6) {
463 device_printf(sc->mlx_dev, " *** WARNING *** This firmware revision is not recommended\n");
464 device_printf(sc->mlx_dev, " *** WARNING *** Use revision 4.06 or later\n");
465 }
466 break;
467 case MLX_IFTYPE_5:
468 if (fwminor < 7) {
469 device_printf(sc->mlx_dev, " *** WARNING *** This firmware revision is not recommended\n");
470 device_printf(sc->mlx_dev, " *** WARNING *** Use revision 5.07 or later\n");
471 }
472 break;
473 default:
474 MLX_IO_UNLOCK(sc);
475 return(ENXIO); /* should never happen */
476 }
477 MLX_IO_UNLOCK(sc);
478
479 /*
480 * Create the final scatter/gather mappings now that we have characterised the controller.
481 */
482 error = mlx_sglist_map(sc);
483 if (error != 0) {
484 device_printf(sc->mlx_dev, "can't make final s/g list mapping\n");
485 return(error);
486 }
487
488 /*
489 * No user-requested background operation is in progress.
490 */
491 sc->mlx_background = 0;
492 sc->mlx_rebuildstat.rs_code = MLX_REBUILDSTAT_IDLE;
493
494 /*
495 * Create the control device.
496 */
497 sc->mlx_dev_t = make_dev(&mlx_cdevsw, 0, UID_ROOT, GID_OPERATOR,
498 S_IRUSR | S_IWUSR, "mlx%d", device_get_unit(sc->mlx_dev));
499 sc->mlx_dev_t->si_drv1 = sc;
500
501 /*
502 * Start the timeout routine.
503 */
504 callout_reset(&sc->mlx_timeout, hz, mlx_periodic, sc);
505
506 /* print a little information about the controller */
507 mlx_describe_controller(sc);
508
509 return(0);
510 }
511
512 /********************************************************************************
513 * Locate disk resources and attach children to them.
514 */
515 void
mlx_startup(struct mlx_softc * sc)516 mlx_startup(struct mlx_softc *sc)
517 {
518 struct mlx_enq_sys_drive *mes;
519 struct mlx_sysdrive *dr;
520 int i, error;
521
522 debug_called(1);
523
524 /*
525 * Scan all the system drives and attach children for those that
526 * don't currently have them.
527 */
528 MLX_IO_LOCK(sc);
529 mes = mlx_enquire(sc, MLX_CMD_ENQSYSDRIVE, sizeof(*mes) * MLX_MAXDRIVES, NULL);
530 MLX_IO_UNLOCK(sc);
531 if (mes == NULL) {
532 device_printf(sc->mlx_dev, "error fetching drive status\n");
533 return;
534 }
535
536 /* iterate over drives returned */
537 MLX_CONFIG_LOCK(sc);
538 for (i = 0, dr = &sc->mlx_sysdrive[0];
539 (i < MLX_MAXDRIVES) && (mes[i].sd_size != 0xffffffff);
540 i++, dr++) {
541 /* are we already attached to this drive? */
542 if (dr->ms_disk == 0) {
543 /* pick up drive information */
544 dr->ms_size = mes[i].sd_size;
545 dr->ms_raidlevel = mes[i].sd_raidlevel & 0xf;
546 dr->ms_state = mes[i].sd_state;
547
548 /* generate geometry information */
549 if (sc->mlx_geom == MLX_GEOM_128_32) {
550 dr->ms_heads = 128;
551 dr->ms_sectors = 32;
552 dr->ms_cylinders = dr->ms_size / (128 * 32);
553 } else { /* MLX_GEOM_255/63 */
554 dr->ms_heads = 255;
555 dr->ms_sectors = 63;
556 dr->ms_cylinders = dr->ms_size / (255 * 63);
557 }
558 dr->ms_disk = device_add_child(sc->mlx_dev, /*"mlxd"*/NULL, -1);
559 if (dr->ms_disk == 0)
560 device_printf(sc->mlx_dev, "device_add_child failed\n");
561 device_set_ivars(dr->ms_disk, dr);
562 }
563 }
564 free(mes, M_DEVBUF);
565 if ((error = bus_generic_attach(sc->mlx_dev)) != 0)
566 device_printf(sc->mlx_dev, "bus_generic_attach returned %d", error);
567
568 /* mark controller back up */
569 MLX_IO_LOCK(sc);
570 sc->mlx_state &= ~MLX_STATE_SHUTDOWN;
571
572 /* enable interrupts */
573 sc->mlx_intaction(sc, MLX_INTACTION_ENABLE);
574 MLX_IO_UNLOCK(sc);
575 MLX_CONFIG_UNLOCK(sc);
576 }
577
578 /********************************************************************************
579 * Disconnect from the controller completely, in preparation for unload.
580 */
581 int
mlx_detach(device_t dev)582 mlx_detach(device_t dev)
583 {
584 struct mlx_softc *sc = device_get_softc(dev);
585 struct mlxd_softc *mlxd;
586 int i, error;
587
588 debug_called(1);
589
590 error = EBUSY;
591 MLX_CONFIG_LOCK(sc);
592 if (sc->mlx_state & MLX_STATE_OPEN)
593 goto out;
594
595 for (i = 0; i < MLX_MAXDRIVES; i++) {
596 if (sc->mlx_sysdrive[i].ms_disk != 0) {
597 mlxd = device_get_softc(sc->mlx_sysdrive[i].ms_disk);
598 if (mlxd->mlxd_flags & MLXD_OPEN) { /* drive is mounted, abort detach */
599 device_printf(sc->mlx_sysdrive[i].ms_disk, "still open, can't detach\n");
600 goto out;
601 }
602 }
603 }
604 if ((error = mlx_shutdown(dev)))
605 goto out;
606 MLX_CONFIG_UNLOCK(sc);
607
608 mlx_free(sc);
609
610 return (0);
611 out:
612 MLX_CONFIG_UNLOCK(sc);
613 return(error);
614 }
615
616 /********************************************************************************
617 * Bring the controller down to a dormant state and detach all child devices.
618 *
619 * This function is called before detach, system shutdown, or before performing
620 * an operation which may add or delete system disks. (Call mlx_startup to
621 * resume normal operation.)
622 *
623 * Note that we can assume that the bioq on the controller is empty, as we won't
624 * allow shutdown if any device is open.
625 */
626 int
mlx_shutdown(device_t dev)627 mlx_shutdown(device_t dev)
628 {
629 struct mlx_softc *sc = device_get_softc(dev);
630 int error;
631
632 MLX_CONFIG_LOCK(sc);
633 error = mlx_shutdown_locked(sc);
634 MLX_CONFIG_UNLOCK(sc);
635 return (error);
636 }
637
638 static int
mlx_shutdown_locked(struct mlx_softc * sc)639 mlx_shutdown_locked(struct mlx_softc *sc)
640 {
641 int i, error;
642
643 debug_called(1);
644
645 MLX_CONFIG_ASSERT_LOCKED(sc);
646
647 MLX_IO_LOCK(sc);
648 sc->mlx_state |= MLX_STATE_SHUTDOWN;
649 sc->mlx_intaction(sc, MLX_INTACTION_DISABLE);
650
651 /* flush controller */
652 device_printf(sc->mlx_dev, "flushing cache...");
653 if (mlx_flush(sc)) {
654 printf("failed\n");
655 } else {
656 printf("done\n");
657 }
658 MLX_IO_UNLOCK(sc);
659
660 /* delete all our child devices */
661 for (i = 0; i < MLX_MAXDRIVES; i++) {
662 if (sc->mlx_sysdrive[i].ms_disk != 0) {
663 if ((error = device_delete_child(sc->mlx_dev, sc->mlx_sysdrive[i].ms_disk)) != 0)
664 return (error);
665 sc->mlx_sysdrive[i].ms_disk = 0;
666 }
667 }
668
669 return (0);
670 }
671
672 /********************************************************************************
673 * Bring the controller to a quiescent state, ready for system suspend.
674 */
675 int
mlx_suspend(device_t dev)676 mlx_suspend(device_t dev)
677 {
678 struct mlx_softc *sc = device_get_softc(dev);
679
680 debug_called(1);
681
682 MLX_IO_LOCK(sc);
683 sc->mlx_state |= MLX_STATE_SUSPEND;
684
685 /* flush controller */
686 device_printf(sc->mlx_dev, "flushing cache...");
687 printf("%s\n", mlx_flush(sc) ? "failed" : "done");
688
689 sc->mlx_intaction(sc, MLX_INTACTION_DISABLE);
690 MLX_IO_UNLOCK(sc);
691
692 return(0);
693 }
694
695 /********************************************************************************
696 * Bring the controller back to a state ready for operation.
697 */
698 int
mlx_resume(device_t dev)699 mlx_resume(device_t dev)
700 {
701 struct mlx_softc *sc = device_get_softc(dev);
702
703 debug_called(1);
704
705 MLX_IO_LOCK(sc);
706 sc->mlx_state &= ~MLX_STATE_SUSPEND;
707 sc->mlx_intaction(sc, MLX_INTACTION_ENABLE);
708 MLX_IO_UNLOCK(sc);
709
710 return(0);
711 }
712
713 /*******************************************************************************
714 * Take an interrupt, or be poked by other code to look for interrupt-worthy
715 * status.
716 */
717 void
mlx_intr(void * arg)718 mlx_intr(void *arg)
719 {
720 struct mlx_softc *sc = (struct mlx_softc *)arg;
721
722 debug_called(1);
723
724 /* collect finished commands, queue anything waiting */
725 MLX_IO_LOCK(sc);
726 mlx_done(sc, 1);
727 MLX_IO_UNLOCK(sc);
728 };
729
730 /*******************************************************************************
731 * Receive a buf structure from a child device and queue it on a particular
732 * disk resource, then poke the disk resource to start as much work as it can.
733 */
734 int
mlx_submit_buf(struct mlx_softc * sc,struct bio * bp)735 mlx_submit_buf(struct mlx_softc *sc, struct bio *bp)
736 {
737
738 debug_called(1);
739
740 MLX_IO_ASSERT_LOCKED(sc);
741 bioq_insert_tail(&sc->mlx_bioq, bp);
742 sc->mlx_waitbufs++;
743 mlx_startio(sc);
744 return(0);
745 }
746
747 /********************************************************************************
748 * Accept an open operation on the control device.
749 */
750 int
mlx_open(struct cdev * dev,int flags,int fmt,struct thread * td)751 mlx_open(struct cdev *dev, int flags, int fmt, struct thread *td)
752 {
753 struct mlx_softc *sc = dev->si_drv1;
754
755 MLX_CONFIG_LOCK(sc);
756 MLX_IO_LOCK(sc);
757 sc->mlx_state |= MLX_STATE_OPEN;
758 MLX_IO_UNLOCK(sc);
759 MLX_CONFIG_UNLOCK(sc);
760 return(0);
761 }
762
763 /********************************************************************************
764 * Accept the last close on the control device.
765 */
766 int
mlx_close(struct cdev * dev,int flags,int fmt,struct thread * td)767 mlx_close(struct cdev *dev, int flags, int fmt, struct thread *td)
768 {
769 struct mlx_softc *sc = dev->si_drv1;
770
771 MLX_CONFIG_LOCK(sc);
772 MLX_IO_LOCK(sc);
773 sc->mlx_state &= ~MLX_STATE_OPEN;
774 MLX_IO_UNLOCK(sc);
775 MLX_CONFIG_UNLOCK(sc);
776 return (0);
777 }
778
779 /********************************************************************************
780 * Handle controller-specific control operations.
781 */
782 int
mlx_ioctl(struct cdev * dev,u_long cmd,caddr_t addr,int32_t flag,struct thread * td)783 mlx_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, int32_t flag, struct thread *td)
784 {
785 struct mlx_softc *sc = dev->si_drv1;
786 struct mlx_rebuild_request *rb = (struct mlx_rebuild_request *)addr;
787 struct mlx_rebuild_status *rs = (struct mlx_rebuild_status *)addr;
788 int *arg = (int *)addr;
789 struct mlx_pause *mp;
790 struct mlx_sysdrive *dr;
791 struct mlxd_softc *mlxd;
792 int i, error;
793
794 switch(cmd) {
795 /*
796 * Enumerate connected system drives; returns the first system drive's
797 * unit number if *arg is -1, or the next unit after *arg if it's
798 * a valid unit on this controller.
799 */
800 case MLX_NEXT_CHILD:
801 /* search system drives */
802 MLX_CONFIG_LOCK(sc);
803 for (i = 0; i < MLX_MAXDRIVES; i++) {
804 /* is this one attached? */
805 if (sc->mlx_sysdrive[i].ms_disk != 0) {
806 /* looking for the next one we come across? */
807 if (*arg == -1) {
808 *arg = device_get_unit(sc->mlx_sysdrive[i].ms_disk);
809 MLX_CONFIG_UNLOCK(sc);
810 return(0);
811 }
812 /* we want the one after this one */
813 if (*arg == device_get_unit(sc->mlx_sysdrive[i].ms_disk))
814 *arg = -1;
815 }
816 }
817 MLX_CONFIG_UNLOCK(sc);
818 return(ENOENT);
819
820 /*
821 * Scan the controller to see whether new drives have appeared.
822 */
823 case MLX_RESCAN_DRIVES:
824 mtx_lock(&Giant);
825 mlx_startup(sc);
826 mtx_unlock(&Giant);
827 return(0);
828
829 /*
830 * Disconnect from the specified drive; it may be about to go
831 * away.
832 */
833 case MLX_DETACH_DRIVE: /* detach one drive */
834 MLX_CONFIG_LOCK(sc);
835 if (((dr = mlx_findunit(sc, *arg)) == NULL) ||
836 ((mlxd = device_get_softc(dr->ms_disk)) == NULL)) {
837 MLX_CONFIG_UNLOCK(sc);
838 return(ENOENT);
839 }
840
841 device_printf(dr->ms_disk, "detaching...");
842 error = 0;
843 if (mlxd->mlxd_flags & MLXD_OPEN) {
844 error = EBUSY;
845 goto detach_out;
846 }
847
848 /* flush controller */
849 MLX_IO_LOCK(sc);
850 if (mlx_flush(sc)) {
851 MLX_IO_UNLOCK(sc);
852 error = EBUSY;
853 goto detach_out;
854 }
855 MLX_IO_UNLOCK(sc);
856
857 /* nuke drive */
858 if ((error = device_delete_child(sc->mlx_dev, dr->ms_disk)) != 0)
859 goto detach_out;
860 dr->ms_disk = 0;
861
862 detach_out:
863 MLX_CONFIG_UNLOCK(sc);
864 if (error) {
865 printf("failed\n");
866 } else {
867 printf("done\n");
868 }
869 return(error);
870
871 /*
872 * Pause one or more SCSI channels for a period of time, to assist
873 * in the process of hot-swapping devices.
874 *
875 * Note that at least the 3.51 firmware on the DAC960PL doesn't seem
876 * to do this right.
877 */
878 case MLX_PAUSE_CHANNEL: /* schedule a channel pause */
879 /* Does this command work on this firmware? */
880 if (!(sc->mlx_feature & MLX_FEAT_PAUSEWORKS))
881 return(EOPNOTSUPP);
882
883 /* check time values */
884 mp = (struct mlx_pause *)addr;
885 if ((mp->mp_when < 0) || (mp->mp_when > 3600))
886 return(EINVAL);
887 if ((mp->mp_howlong < 1) || (mp->mp_howlong > (0xf * 30)))
888 return(EINVAL);
889
890 MLX_IO_LOCK(sc);
891 if ((mp->mp_which == MLX_PAUSE_CANCEL) && (sc->mlx_pause.mp_when != 0)) {
892 /* cancel a pending pause operation */
893 sc->mlx_pause.mp_which = 0;
894 } else {
895 /* fix for legal channels */
896 mp->mp_which &= ((1 << sc->mlx_enq2->me_actual_channels) -1);
897
898 /* check for a pause currently running */
899 if ((sc->mlx_pause.mp_which != 0) && (sc->mlx_pause.mp_when == 0)) {
900 MLX_IO_UNLOCK(sc);
901 return(EBUSY);
902 }
903
904 /* looks ok, go with it */
905 sc->mlx_pause.mp_which = mp->mp_which;
906 sc->mlx_pause.mp_when = time_second + mp->mp_when;
907 sc->mlx_pause.mp_howlong = sc->mlx_pause.mp_when + mp->mp_howlong;
908 }
909 MLX_IO_UNLOCK(sc);
910 return(0);
911
912 /*
913 * Accept a command passthrough-style.
914 */
915 case MLX_COMMAND:
916 return(mlx_user_command(sc, (struct mlx_usercommand *)addr));
917
918 /*
919 * Start a rebuild on a given SCSI disk
920 */
921 case MLX_REBUILDASYNC:
922 MLX_IO_LOCK(sc);
923 if (sc->mlx_background != 0) {
924 MLX_IO_UNLOCK(sc);
925 rb->rr_status = 0x0106;
926 return(EBUSY);
927 }
928 rb->rr_status = mlx_rebuild(sc, rb->rr_channel, rb->rr_target);
929 switch (rb->rr_status) {
930 case 0:
931 error = 0;
932 break;
933 case 0x10000:
934 error = ENOMEM; /* couldn't set up the command */
935 break;
936 case 0x0002:
937 error = EBUSY;
938 break;
939 case 0x0104:
940 error = EIO;
941 break;
942 case 0x0105:
943 error = ERANGE;
944 break;
945 case 0x0106:
946 error = EBUSY;
947 break;
948 default:
949 error = EINVAL;
950 break;
951 }
952 if (error == 0)
953 sc->mlx_background = MLX_BACKGROUND_REBUILD;
954 MLX_IO_UNLOCK(sc);
955 return(error);
956
957 /*
958 * Get the status of the current rebuild or consistency check.
959 */
960 case MLX_REBUILDSTAT:
961 MLX_IO_LOCK(sc);
962 *rs = sc->mlx_rebuildstat;
963 MLX_IO_UNLOCK(sc);
964 return(0);
965
966 /*
967 * Return the per-controller system drive number matching the
968 * disk device number in (arg), if it happens to belong to us.
969 */
970 case MLX_GET_SYSDRIVE:
971 error = ENOENT;
972 MLX_CONFIG_LOCK(sc);
973 mtx_lock(&Giant);
974 mlxd = (struct mlxd_softc *)devclass_get_softc(mlxd_devclass, *arg);
975 mtx_unlock(&Giant);
976 if ((mlxd != NULL) && (mlxd->mlxd_drive >= sc->mlx_sysdrive) &&
977 (mlxd->mlxd_drive < (sc->mlx_sysdrive + MLX_MAXDRIVES))) {
978 error = 0;
979 *arg = mlxd->mlxd_drive - sc->mlx_sysdrive;
980 }
981 MLX_CONFIG_UNLOCK(sc);
982 return(error);
983
984 default:
985 return(ENOTTY);
986 }
987 }
988
989 /********************************************************************************
990 * Handle operations requested by a System Drive connected to this controller.
991 */
992 int
mlx_submit_ioctl(struct mlx_softc * sc,struct mlx_sysdrive * drive,u_long cmd,caddr_t addr,int32_t flag,struct thread * td)993 mlx_submit_ioctl(struct mlx_softc *sc, struct mlx_sysdrive *drive, u_long cmd,
994 caddr_t addr, int32_t flag, struct thread *td)
995 {
996 int *arg = (int *)addr;
997 int error, result;
998
999 switch(cmd) {
1000 /*
1001 * Return the current status of this drive.
1002 */
1003 case MLXD_STATUS:
1004 MLX_IO_LOCK(sc);
1005 *arg = drive->ms_state;
1006 MLX_IO_UNLOCK(sc);
1007 return(0);
1008
1009 /*
1010 * Start a background consistency check on this drive.
1011 */
1012 case MLXD_CHECKASYNC: /* start a background consistency check */
1013 MLX_IO_LOCK(sc);
1014 if (sc->mlx_background != 0) {
1015 MLX_IO_UNLOCK(sc);
1016 *arg = 0x0106;
1017 return(EBUSY);
1018 }
1019 result = mlx_check(sc, drive - &sc->mlx_sysdrive[0]);
1020 switch (result) {
1021 case 0:
1022 error = 0;
1023 break;
1024 case 0x10000:
1025 error = ENOMEM; /* couldn't set up the command */
1026 break;
1027 case 0x0002:
1028 error = EIO;
1029 break;
1030 case 0x0105:
1031 error = ERANGE;
1032 break;
1033 case 0x0106:
1034 error = EBUSY;
1035 break;
1036 default:
1037 error = EINVAL;
1038 break;
1039 }
1040 if (error == 0)
1041 sc->mlx_background = MLX_BACKGROUND_CHECK;
1042 MLX_IO_UNLOCK(sc);
1043 *arg = result;
1044 return(error);
1045
1046 }
1047 return(ENOIOCTL);
1048 }
1049
1050
1051 /********************************************************************************
1052 ********************************************************************************
1053 Status Monitoring
1054 ********************************************************************************
1055 ********************************************************************************/
1056
1057 /********************************************************************************
1058 * Fire off commands to periodically check the status of connected drives.
1059 */
1060 static void
mlx_periodic(void * data)1061 mlx_periodic(void *data)
1062 {
1063 struct mlx_softc *sc = (struct mlx_softc *)data;
1064
1065 debug_called(1);
1066 MLX_IO_ASSERT_LOCKED(sc);
1067
1068 /*
1069 * Run a bus pause?
1070 */
1071 if ((sc->mlx_pause.mp_which != 0) &&
1072 (sc->mlx_pause.mp_when > 0) &&
1073 (time_second >= sc->mlx_pause.mp_when)){
1074
1075 mlx_pause_action(sc); /* pause is running */
1076 sc->mlx_pause.mp_when = 0;
1077 sysbeep(500, hz);
1078
1079 /*
1080 * Bus pause still running?
1081 */
1082 } else if ((sc->mlx_pause.mp_which != 0) &&
1083 (sc->mlx_pause.mp_when == 0)) {
1084
1085 /* time to stop bus pause? */
1086 if (time_second >= sc->mlx_pause.mp_howlong) {
1087 mlx_pause_action(sc);
1088 sc->mlx_pause.mp_which = 0; /* pause is complete */
1089 sysbeep(500, hz);
1090 } else {
1091 sysbeep((time_second % 5) * 100 + 500, hz/8);
1092 }
1093
1094 /*
1095 * Run normal periodic activities?
1096 */
1097 } else if (time_second > (sc->mlx_lastpoll + 10)) {
1098 sc->mlx_lastpoll = time_second;
1099
1100 /*
1101 * Check controller status.
1102 *
1103 * XXX Note that this may not actually launch a command in situations of high load.
1104 */
1105 mlx_enquire(sc, (sc->mlx_iftype == MLX_IFTYPE_2) ? MLX_CMD_ENQUIRY_OLD : MLX_CMD_ENQUIRY,
1106 imax(sizeof(struct mlx_enquiry), sizeof(struct mlx_enquiry_old)), mlx_periodic_enquiry);
1107
1108 /*
1109 * Check system drive status.
1110 *
1111 * XXX This might be better left to event-driven detection, eg. I/O to an offline
1112 * drive will detect it's offline, rebuilds etc. should detect the drive is back
1113 * online.
1114 */
1115 mlx_enquire(sc, MLX_CMD_ENQSYSDRIVE, sizeof(struct mlx_enq_sys_drive) * MLX_MAXDRIVES,
1116 mlx_periodic_enquiry);
1117
1118 }
1119
1120 /* get drive rebuild/check status */
1121 /* XXX should check sc->mlx_background if this is only valid while in progress */
1122 mlx_enquire(sc, MLX_CMD_REBUILDSTAT, sizeof(struct mlx_rebuild_stat), mlx_periodic_rebuild);
1123
1124 /* deal with possibly-missed interrupts and timed-out commands */
1125 mlx_done(sc, 1);
1126
1127 /* reschedule another poll next second or so */
1128 callout_reset(&sc->mlx_timeout, hz, mlx_periodic, sc);
1129 }
1130
1131 /********************************************************************************
1132 * Handle the result of an ENQUIRY command instigated by periodic status polling.
1133 */
1134 static void
mlx_periodic_enquiry(struct mlx_command * mc)1135 mlx_periodic_enquiry(struct mlx_command *mc)
1136 {
1137 struct mlx_softc *sc = mc->mc_sc;
1138
1139 debug_called(1);
1140 MLX_IO_ASSERT_LOCKED(sc);
1141
1142 /* Command completed OK? */
1143 if (mc->mc_status != 0) {
1144 device_printf(sc->mlx_dev, "periodic enquiry failed - %s\n", mlx_diagnose_command(mc));
1145 goto out;
1146 }
1147
1148 /* respond to command */
1149 switch(mc->mc_mailbox[0]) {
1150 /*
1151 * This is currently a bit fruitless, as we don't know how to extract the eventlog
1152 * pointer yet.
1153 */
1154 case MLX_CMD_ENQUIRY_OLD:
1155 {
1156 struct mlx_enquiry *me = (struct mlx_enquiry *)mc->mc_data;
1157 struct mlx_enquiry_old *meo = (struct mlx_enquiry_old *)mc->mc_data;
1158 int i;
1159
1160 /* convert data in-place to new format */
1161 for (i = (sizeof(me->me_dead) / sizeof(me->me_dead[0])) - 1; i >= 0; i--) {
1162 me->me_dead[i].dd_chan = meo->me_dead[i].dd_chan;
1163 me->me_dead[i].dd_targ = meo->me_dead[i].dd_targ;
1164 }
1165 me->me_misc_flags = 0;
1166 me->me_rebuild_count = meo->me_rebuild_count;
1167 me->me_dead_count = meo->me_dead_count;
1168 me->me_critical_sd_count = meo->me_critical_sd_count;
1169 me->me_event_log_seq_num = 0;
1170 me->me_offline_sd_count = meo->me_offline_sd_count;
1171 me->me_max_commands = meo->me_max_commands;
1172 me->me_rebuild_flag = meo->me_rebuild_flag;
1173 me->me_fwmajor = meo->me_fwmajor;
1174 me->me_fwminor = meo->me_fwminor;
1175 me->me_status_flags = meo->me_status_flags;
1176 me->me_flash_age = meo->me_flash_age;
1177 for (i = (sizeof(me->me_drvsize) / sizeof(me->me_drvsize[0])) - 1; i >= 0; i--) {
1178 if (i > ((sizeof(meo->me_drvsize) / sizeof(meo->me_drvsize[0])) - 1)) {
1179 me->me_drvsize[i] = 0; /* drive beyond supported range */
1180 } else {
1181 me->me_drvsize[i] = meo->me_drvsize[i];
1182 }
1183 }
1184 me->me_num_sys_drvs = meo->me_num_sys_drvs;
1185 }
1186 /* FALLTHROUGH */
1187
1188 /*
1189 * Generic controller status update. We could do more with this than just
1190 * checking the event log.
1191 */
1192 case MLX_CMD_ENQUIRY:
1193 {
1194 struct mlx_enquiry *me = (struct mlx_enquiry *)mc->mc_data;
1195
1196 if (sc->mlx_currevent == -1) {
1197 /* initialise our view of the event log */
1198 sc->mlx_currevent = sc->mlx_lastevent = me->me_event_log_seq_num;
1199 } else if ((me->me_event_log_seq_num != sc->mlx_lastevent) && !(sc->mlx_flags & MLX_EVENTLOG_BUSY)) {
1200 /* record where current events are up to */
1201 sc->mlx_currevent = me->me_event_log_seq_num;
1202 debug(1, "event log pointer was %d, now %d\n", sc->mlx_lastevent, sc->mlx_currevent);
1203
1204 /* mark the event log as busy */
1205 sc->mlx_flags |= MLX_EVENTLOG_BUSY;
1206
1207 /* drain new eventlog entries */
1208 mlx_periodic_eventlog_poll(sc);
1209 }
1210 break;
1211 }
1212 case MLX_CMD_ENQSYSDRIVE:
1213 {
1214 struct mlx_enq_sys_drive *mes = (struct mlx_enq_sys_drive *)mc->mc_data;
1215 struct mlx_sysdrive *dr;
1216 int i;
1217
1218 for (i = 0, dr = &sc->mlx_sysdrive[0];
1219 (i < MLX_MAXDRIVES) && (mes[i].sd_size != 0xffffffff);
1220 i++) {
1221
1222 /* has state been changed by controller? */
1223 if (dr->ms_state != mes[i].sd_state) {
1224 switch(mes[i].sd_state) {
1225 case MLX_SYSD_OFFLINE:
1226 device_printf(dr->ms_disk, "drive offline\n");
1227 break;
1228 case MLX_SYSD_ONLINE:
1229 device_printf(dr->ms_disk, "drive online\n");
1230 break;
1231 case MLX_SYSD_CRITICAL:
1232 device_printf(dr->ms_disk, "drive critical\n");
1233 break;
1234 }
1235 /* save new state */
1236 dr->ms_state = mes[i].sd_state;
1237 }
1238 }
1239 break;
1240 }
1241 default:
1242 device_printf(sc->mlx_dev, "%s: unknown command 0x%x", __func__, mc->mc_mailbox[0]);
1243 break;
1244 }
1245
1246 out:
1247 free(mc->mc_data, M_DEVBUF);
1248 mlx_releasecmd(mc);
1249 }
1250
1251 static void
mlx_eventlog_cb(void * arg,bus_dma_segment_t * segs,int nsegments,int error)1252 mlx_eventlog_cb(void *arg, bus_dma_segment_t *segs, int nsegments, int error)
1253 {
1254 struct mlx_command *mc;
1255
1256 mc = (struct mlx_command *)arg;
1257 mlx_setup_dmamap(mc, segs, nsegments, error);
1258
1259 /* build the command to get one entry */
1260 mlx_make_type3(mc, MLX_CMD_LOGOP, MLX_LOGOP_GET, 1,
1261 mc->mc_sc->mlx_lastevent, 0, 0, mc->mc_dataphys, 0);
1262 mc->mc_complete = mlx_periodic_eventlog_respond;
1263 mc->mc_private = mc;
1264
1265 /* start the command */
1266 if (mlx_start(mc) != 0) {
1267 mlx_releasecmd(mc);
1268 free(mc->mc_data, M_DEVBUF);
1269 mc->mc_data = NULL;
1270 }
1271
1272 }
1273
1274 /********************************************************************************
1275 * Instigate a poll for one event log message on (sc).
1276 * We only poll for one message at a time, to keep our command usage down.
1277 */
1278 static void
mlx_periodic_eventlog_poll(struct mlx_softc * sc)1279 mlx_periodic_eventlog_poll(struct mlx_softc *sc)
1280 {
1281 struct mlx_command *mc;
1282 void *result = NULL;
1283 int error = 0;
1284
1285 debug_called(1);
1286 MLX_IO_ASSERT_LOCKED(sc);
1287
1288 /* get ourselves a command buffer */
1289 error = 1;
1290 if ((mc = mlx_alloccmd(sc)) == NULL)
1291 goto out;
1292
1293 /* allocate the response structure */
1294 if ((result = malloc(/*sizeof(struct mlx_eventlog_entry)*/1024, M_DEVBUF,
1295 M_NOWAIT)) == NULL)
1296 goto out;
1297
1298 /* get a command slot */
1299 if (mlx_getslot(mc))
1300 goto out;
1301
1302 /* map the command so the controller can see it */
1303 mc->mc_data = result;
1304 mc->mc_length = /*sizeof(struct mlx_eventlog_entry)*/1024;
1305 error = bus_dmamap_load(sc->mlx_buffer_dmat, mc->mc_dmamap, mc->mc_data,
1306 mc->mc_length, mlx_eventlog_cb, mc, BUS_DMA_NOWAIT);
1307
1308 out:
1309 if (error != 0) {
1310 if (mc != NULL)
1311 mlx_releasecmd(mc);
1312 if ((result != NULL) && (mc->mc_data != NULL))
1313 free(result, M_DEVBUF);
1314 }
1315 }
1316
1317 /********************************************************************************
1318 * Handle the result of polling for a log message, generate diagnostic output.
1319 * If this wasn't the last message waiting for us, we'll go collect another.
1320 */
1321 static char *mlx_sense_messages[] = {
1322 "because write recovery failed",
1323 "because of SCSI bus reset failure",
1324 "because of double check condition",
1325 "because it was removed",
1326 "because of gross error on SCSI chip",
1327 "because of bad tag returned from drive",
1328 "because of timeout on SCSI command",
1329 "because of reset SCSI command issued from system",
1330 "because busy or parity error count exceeded limit",
1331 "because of 'kill drive' command from system",
1332 "because of selection timeout",
1333 "due to SCSI phase sequence error",
1334 "due to unknown status"
1335 };
1336
1337 static void
mlx_periodic_eventlog_respond(struct mlx_command * mc)1338 mlx_periodic_eventlog_respond(struct mlx_command *mc)
1339 {
1340 struct mlx_softc *sc = mc->mc_sc;
1341 struct mlx_eventlog_entry *el = (struct mlx_eventlog_entry *)mc->mc_data;
1342 char *reason;
1343
1344 debug_called(1);
1345 MLX_IO_ASSERT_LOCKED(sc);
1346
1347 sc->mlx_lastevent++; /* next message... */
1348 if (mc->mc_status == 0) {
1349
1350 /* handle event log message */
1351 switch(el->el_type) {
1352 /*
1353 * This is the only sort of message we understand at the moment.
1354 * The tests here are probably incomplete.
1355 */
1356 case MLX_LOGMSG_SENSE: /* sense data */
1357 /* Mylex vendor-specific message indicating a drive was killed? */
1358 if ((el->el_sensekey == 9) &&
1359 (el->el_asc == 0x80)) {
1360 if (el->el_asq < (sizeof(mlx_sense_messages) / sizeof(mlx_sense_messages[0]))) {
1361 reason = mlx_sense_messages[el->el_asq];
1362 } else {
1363 reason = "for unknown reason";
1364 }
1365 device_printf(sc->mlx_dev, "physical drive %d:%d killed %s\n",
1366 el->el_channel, el->el_target, reason);
1367 }
1368 /* SCSI drive was reset? */
1369 if ((el->el_sensekey == 6) && (el->el_asc == 0x29)) {
1370 device_printf(sc->mlx_dev, "physical drive %d:%d reset\n",
1371 el->el_channel, el->el_target);
1372 }
1373 /* SCSI drive error? */
1374 if (!((el->el_sensekey == 0) ||
1375 ((el->el_sensekey == 2) &&
1376 (el->el_asc == 0x04) &&
1377 ((el->el_asq == 0x01) ||
1378 (el->el_asq == 0x02))))) {
1379 device_printf(sc->mlx_dev, "physical drive %d:%d error log: sense = %d asc = %x asq = %x\n",
1380 el->el_channel, el->el_target, el->el_sensekey, el->el_asc, el->el_asq);
1381 device_printf(sc->mlx_dev, " info %4D csi %4D\n", el->el_information, ":", el->el_csi, ":");
1382 }
1383 break;
1384
1385 default:
1386 device_printf(sc->mlx_dev, "unknown log message type 0x%x\n", el->el_type);
1387 break;
1388 }
1389 } else {
1390 device_printf(sc->mlx_dev, "error reading message log - %s\n", mlx_diagnose_command(mc));
1391 /* give up on all the outstanding messages, as we may have come unsynched */
1392 sc->mlx_lastevent = sc->mlx_currevent;
1393 }
1394
1395 /* dispose of command and data */
1396 free(mc->mc_data, M_DEVBUF);
1397 mlx_releasecmd(mc);
1398
1399 /* is there another message to obtain? */
1400 if (sc->mlx_lastevent != sc->mlx_currevent) {
1401 mlx_periodic_eventlog_poll(sc);
1402 } else {
1403 /* clear log-busy status */
1404 sc->mlx_flags &= ~MLX_EVENTLOG_BUSY;
1405 }
1406 }
1407
1408 /********************************************************************************
1409 * Handle check/rebuild operations in progress.
1410 */
1411 static void
mlx_periodic_rebuild(struct mlx_command * mc)1412 mlx_periodic_rebuild(struct mlx_command *mc)
1413 {
1414 struct mlx_softc *sc = mc->mc_sc;
1415 struct mlx_rebuild_status *mr = (struct mlx_rebuild_status *)mc->mc_data;
1416
1417 MLX_IO_ASSERT_LOCKED(sc);
1418 switch(mc->mc_status) {
1419 case 0: /* operation running, update stats */
1420 sc->mlx_rebuildstat = *mr;
1421
1422 /* spontaneous rebuild/check? */
1423 if (sc->mlx_background == 0) {
1424 sc->mlx_background = MLX_BACKGROUND_SPONTANEOUS;
1425 device_printf(sc->mlx_dev, "background check/rebuild operation started\n");
1426 }
1427 break;
1428
1429 case 0x0105: /* nothing running, finalise stats and report */
1430 switch(sc->mlx_background) {
1431 case MLX_BACKGROUND_CHECK:
1432 device_printf(sc->mlx_dev, "consistency check completed\n"); /* XXX print drive? */
1433 break;
1434 case MLX_BACKGROUND_REBUILD:
1435 device_printf(sc->mlx_dev, "drive rebuild completed\n"); /* XXX print channel/target? */
1436 break;
1437 case MLX_BACKGROUND_SPONTANEOUS:
1438 default:
1439 /* if we have previously been non-idle, report the transition */
1440 if (sc->mlx_rebuildstat.rs_code != MLX_REBUILDSTAT_IDLE) {
1441 device_printf(sc->mlx_dev, "background check/rebuild operation completed\n");
1442 }
1443 }
1444 sc->mlx_background = 0;
1445 sc->mlx_rebuildstat.rs_code = MLX_REBUILDSTAT_IDLE;
1446 break;
1447 }
1448 free(mc->mc_data, M_DEVBUF);
1449 mlx_releasecmd(mc);
1450 }
1451
1452 /********************************************************************************
1453 ********************************************************************************
1454 Channel Pause
1455 ********************************************************************************
1456 ********************************************************************************/
1457
1458 /********************************************************************************
1459 * It's time to perform a channel pause action for (sc), either start or stop
1460 * the pause.
1461 */
1462 static void
mlx_pause_action(struct mlx_softc * sc)1463 mlx_pause_action(struct mlx_softc *sc)
1464 {
1465 struct mlx_command *mc;
1466 int failsafe, i, command;
1467
1468 MLX_IO_ASSERT_LOCKED(sc);
1469
1470 /* What are we doing here? */
1471 if (sc->mlx_pause.mp_when == 0) {
1472 command = MLX_CMD_STARTCHANNEL;
1473 failsafe = 0;
1474
1475 } else {
1476 command = MLX_CMD_STOPCHANNEL;
1477
1478 /*
1479 * Channels will always start again after the failsafe period,
1480 * which is specified in multiples of 30 seconds.
1481 * This constrains us to a maximum pause of 450 seconds.
1482 */
1483 failsafe = ((sc->mlx_pause.mp_howlong - time_second) + 5) / 30;
1484 if (failsafe > 0xf) {
1485 failsafe = 0xf;
1486 sc->mlx_pause.mp_howlong = time_second + (0xf * 30) - 5;
1487 }
1488 }
1489
1490 /* build commands for every channel requested */
1491 for (i = 0; i < sc->mlx_enq2->me_actual_channels; i++) {
1492 if ((1 << i) & sc->mlx_pause.mp_which) {
1493
1494 /* get ourselves a command buffer */
1495 if ((mc = mlx_alloccmd(sc)) == NULL)
1496 goto fail;
1497 /* get a command slot */
1498 mc->mc_flags |= MLX_CMD_PRIORITY;
1499 if (mlx_getslot(mc))
1500 goto fail;
1501
1502 /* build the command */
1503 mlx_make_type2(mc, command, (failsafe << 4) | i, 0, 0, 0, 0, 0, 0, 0);
1504 mc->mc_complete = mlx_pause_done;
1505 mc->mc_private = sc; /* XXX not needed */
1506 if (mlx_start(mc))
1507 goto fail;
1508 /* command submitted OK */
1509 return;
1510
1511 fail:
1512 device_printf(sc->mlx_dev, "%s failed for channel %d\n",
1513 command == MLX_CMD_STOPCHANNEL ? "pause" : "resume", i);
1514 if (mc != NULL)
1515 mlx_releasecmd(mc);
1516 }
1517 }
1518 }
1519
1520 static void
mlx_pause_done(struct mlx_command * mc)1521 mlx_pause_done(struct mlx_command *mc)
1522 {
1523 struct mlx_softc *sc = mc->mc_sc;
1524 int command = mc->mc_mailbox[0];
1525 int channel = mc->mc_mailbox[2] & 0xf;
1526
1527 MLX_IO_ASSERT_LOCKED(sc);
1528 if (mc->mc_status != 0) {
1529 device_printf(sc->mlx_dev, "%s command failed - %s\n",
1530 command == MLX_CMD_STOPCHANNEL ? "pause" : "resume", mlx_diagnose_command(mc));
1531 } else if (command == MLX_CMD_STOPCHANNEL) {
1532 device_printf(sc->mlx_dev, "channel %d pausing for %ld seconds\n",
1533 channel, (long)(sc->mlx_pause.mp_howlong - time_second));
1534 } else {
1535 device_printf(sc->mlx_dev, "channel %d resuming\n", channel);
1536 }
1537 mlx_releasecmd(mc);
1538 }
1539
1540 /********************************************************************************
1541 ********************************************************************************
1542 Command Submission
1543 ********************************************************************************
1544 ********************************************************************************/
1545
1546 static void
mlx_enquire_cb(void * arg,bus_dma_segment_t * segs,int nsegments,int error)1547 mlx_enquire_cb(void *arg, bus_dma_segment_t *segs, int nsegments, int error)
1548 {
1549 struct mlx_softc *sc;
1550 struct mlx_command *mc;
1551
1552 mc = (struct mlx_command *)arg;
1553 if (error)
1554 return;
1555
1556 mlx_setup_dmamap(mc, segs, nsegments, error);
1557
1558 /* build an enquiry command */
1559 sc = mc->mc_sc;
1560 mlx_make_type2(mc, mc->mc_command, 0, 0, 0, 0, 0, 0, mc->mc_dataphys, 0);
1561
1562 /* do we want a completion callback? */
1563 if (mc->mc_complete != NULL) {
1564 if ((error = mlx_start(mc)) != 0)
1565 return;
1566 } else {
1567 /* run the command in either polled or wait mode */
1568 if ((sc->mlx_state & MLX_STATE_INTEN) ? mlx_wait_command(mc) :
1569 mlx_poll_command(mc))
1570 return;
1571
1572 /* command completed OK? */
1573 if (mc->mc_status != 0) {
1574 device_printf(sc->mlx_dev, "ENQUIRY failed - %s\n",
1575 mlx_diagnose_command(mc));
1576 return;
1577 }
1578 }
1579 }
1580
1581 /********************************************************************************
1582 * Perform an Enquiry command using a type-3 command buffer and a return a single
1583 * linear result buffer. If the completion function is specified, it will
1584 * be called with the completed command (and the result response will not be
1585 * valid until that point). Otherwise, the command will either be busy-waited
1586 * for (interrupts not enabled), or slept for.
1587 */
1588 static void *
mlx_enquire(struct mlx_softc * sc,int command,size_t bufsize,void (* complete)(struct mlx_command * mc))1589 mlx_enquire(struct mlx_softc *sc, int command, size_t bufsize, void (* complete)(struct mlx_command *mc))
1590 {
1591 struct mlx_command *mc;
1592 void *result;
1593 int error;
1594
1595 debug_called(1);
1596 MLX_IO_ASSERT_LOCKED(sc);
1597
1598 /* get ourselves a command buffer */
1599 error = 1;
1600 result = NULL;
1601 if ((mc = mlx_alloccmd(sc)) == NULL)
1602 goto out;
1603 /* allocate the response structure */
1604 if ((result = malloc(bufsize, M_DEVBUF, M_NOWAIT)) == NULL)
1605 goto out;
1606 /* get a command slot */
1607 mc->mc_flags |= MLX_CMD_PRIORITY | MLX_CMD_DATAOUT;
1608 if (mlx_getslot(mc))
1609 goto out;
1610
1611 /* map the command so the controller can see it */
1612 mc->mc_data = result;
1613 mc->mc_length = bufsize;
1614 mc->mc_command = command;
1615
1616 if (complete != NULL) {
1617 mc->mc_complete = complete;
1618 mc->mc_private = mc;
1619 }
1620
1621 error = bus_dmamap_load(sc->mlx_buffer_dmat, mc->mc_dmamap, mc->mc_data,
1622 mc->mc_length, mlx_enquire_cb, mc, BUS_DMA_NOWAIT);
1623
1624 out:
1625 /* we got a command, but nobody else will free it */
1626 if ((mc != NULL) && (mc->mc_complete == NULL))
1627 mlx_releasecmd(mc);
1628 /* we got an error, and we allocated a result */
1629 if ((error != 0) && (result != NULL)) {
1630 free(result, M_DEVBUF);
1631 result = NULL;
1632 }
1633 return(result);
1634 }
1635
1636
1637 /********************************************************************************
1638 * Perform a Flush command on the nominated controller.
1639 *
1640 * May be called with interrupts enabled or disabled; will not return until
1641 * the flush operation completes or fails.
1642 */
1643 static int
mlx_flush(struct mlx_softc * sc)1644 mlx_flush(struct mlx_softc *sc)
1645 {
1646 struct mlx_command *mc;
1647 int error;
1648
1649 debug_called(1);
1650 MLX_IO_ASSERT_LOCKED(sc);
1651
1652 /* get ourselves a command buffer */
1653 error = 1;
1654 if ((mc = mlx_alloccmd(sc)) == NULL)
1655 goto out;
1656 /* get a command slot */
1657 if (mlx_getslot(mc))
1658 goto out;
1659
1660 /* build a flush command */
1661 mlx_make_type2(mc, MLX_CMD_FLUSH, 0, 0, 0, 0, 0, 0, 0, 0);
1662
1663 /* can't assume that interrupts are going to work here, so play it safe */
1664 if (mlx_poll_command(mc))
1665 goto out;
1666
1667 /* command completed OK? */
1668 if (mc->mc_status != 0) {
1669 device_printf(sc->mlx_dev, "FLUSH failed - %s\n", mlx_diagnose_command(mc));
1670 goto out;
1671 }
1672
1673 error = 0; /* success */
1674 out:
1675 if (mc != NULL)
1676 mlx_releasecmd(mc);
1677 return(error);
1678 }
1679
1680 /********************************************************************************
1681 * Start a background consistency check on (drive).
1682 *
1683 * May be called with interrupts enabled or disabled; will return as soon as the
1684 * operation has started or been refused.
1685 */
1686 static int
mlx_check(struct mlx_softc * sc,int drive)1687 mlx_check(struct mlx_softc *sc, int drive)
1688 {
1689 struct mlx_command *mc;
1690 int error;
1691
1692 debug_called(1);
1693 MLX_IO_ASSERT_LOCKED(sc);
1694
1695 /* get ourselves a command buffer */
1696 error = 0x10000;
1697 if ((mc = mlx_alloccmd(sc)) == NULL)
1698 goto out;
1699 /* get a command slot */
1700 if (mlx_getslot(mc))
1701 goto out;
1702
1703 /* build a checkasync command, set the "fix it" flag */
1704 mlx_make_type2(mc, MLX_CMD_CHECKASYNC, 0, 0, 0, 0, 0, drive | 0x80, 0, 0);
1705
1706 /* start the command and wait for it to be returned */
1707 if (mlx_wait_command(mc))
1708 goto out;
1709
1710 /* command completed OK? */
1711 if (mc->mc_status != 0) {
1712 device_printf(sc->mlx_dev, "CHECK ASYNC failed - %s\n", mlx_diagnose_command(mc));
1713 } else {
1714 device_printf(sc->mlx_sysdrive[drive].ms_disk, "consistency check started");
1715 }
1716 error = mc->mc_status;
1717
1718 out:
1719 if (mc != NULL)
1720 mlx_releasecmd(mc);
1721 return(error);
1722 }
1723
1724 /********************************************************************************
1725 * Start a background rebuild of the physical drive at (channel),(target).
1726 *
1727 * May be called with interrupts enabled or disabled; will return as soon as the
1728 * operation has started or been refused.
1729 */
1730 static int
mlx_rebuild(struct mlx_softc * sc,int channel,int target)1731 mlx_rebuild(struct mlx_softc *sc, int channel, int target)
1732 {
1733 struct mlx_command *mc;
1734 int error;
1735
1736 debug_called(1);
1737 MLX_IO_ASSERT_LOCKED(sc);
1738
1739 /* get ourselves a command buffer */
1740 error = 0x10000;
1741 if ((mc = mlx_alloccmd(sc)) == NULL)
1742 goto out;
1743 /* get a command slot */
1744 if (mlx_getslot(mc))
1745 goto out;
1746
1747 /* build a checkasync command, set the "fix it" flag */
1748 mlx_make_type2(mc, MLX_CMD_REBUILDASYNC, channel, target, 0, 0, 0, 0, 0, 0);
1749
1750 /* start the command and wait for it to be returned */
1751 if (mlx_wait_command(mc))
1752 goto out;
1753
1754 /* command completed OK? */
1755 if (mc->mc_status != 0) {
1756 device_printf(sc->mlx_dev, "REBUILD ASYNC failed - %s\n", mlx_diagnose_command(mc));
1757 } else {
1758 device_printf(sc->mlx_dev, "drive rebuild started for %d:%d\n", channel, target);
1759 }
1760 error = mc->mc_status;
1761
1762 out:
1763 if (mc != NULL)
1764 mlx_releasecmd(mc);
1765 return(error);
1766 }
1767
1768 /********************************************************************************
1769 * Run the command (mc) and return when it completes.
1770 *
1771 * Interrupts need to be enabled; returns nonzero on error.
1772 */
1773 static int
mlx_wait_command(struct mlx_command * mc)1774 mlx_wait_command(struct mlx_command *mc)
1775 {
1776 struct mlx_softc *sc = mc->mc_sc;
1777 int error, count;
1778
1779 debug_called(1);
1780 MLX_IO_ASSERT_LOCKED(sc);
1781
1782 mc->mc_complete = NULL;
1783 mc->mc_private = mc; /* wake us when you're done */
1784 if ((error = mlx_start(mc)) != 0)
1785 return(error);
1786
1787 count = 0;
1788 /* XXX better timeout? */
1789 while ((mc->mc_status == MLX_STATUS_BUSY) && (count < 30)) {
1790 mtx_sleep(mc->mc_private, &sc->mlx_io_lock, PRIBIO | PCATCH, "mlxwcmd", hz);
1791 }
1792
1793 if (mc->mc_status != 0) {
1794 device_printf(sc->mlx_dev, "command failed - %s\n", mlx_diagnose_command(mc));
1795 return(EIO);
1796 }
1797 return(0);
1798 }
1799
1800
1801 /********************************************************************************
1802 * Start the command (mc) and busy-wait for it to complete.
1803 *
1804 * Should only be used when interrupts can't be relied upon. Returns 0 on
1805 * success, nonzero on error.
1806 * Successfully completed commands are dequeued.
1807 */
1808 static int
mlx_poll_command(struct mlx_command * mc)1809 mlx_poll_command(struct mlx_command *mc)
1810 {
1811 struct mlx_softc *sc = mc->mc_sc;
1812 int error, count;
1813
1814 debug_called(1);
1815 MLX_IO_ASSERT_LOCKED(sc);
1816
1817 mc->mc_complete = NULL;
1818 mc->mc_private = NULL; /* we will poll for it */
1819 if ((error = mlx_start(mc)) != 0)
1820 return(error);
1821
1822 count = 0;
1823 do {
1824 /* poll for completion */
1825 mlx_done(mc->mc_sc, 1);
1826
1827 } while ((mc->mc_status == MLX_STATUS_BUSY) && (count++ < 15000000));
1828 if (mc->mc_status != MLX_STATUS_BUSY) {
1829 TAILQ_REMOVE(&sc->mlx_work, mc, mc_link);
1830 return(0);
1831 }
1832 device_printf(sc->mlx_dev, "command failed - %s\n", mlx_diagnose_command(mc));
1833 return(EIO);
1834 }
1835
1836 void
mlx_startio_cb(void * arg,bus_dma_segment_t * segs,int nsegments,int error)1837 mlx_startio_cb(void *arg, bus_dma_segment_t *segs, int nsegments, int error)
1838 {
1839 struct mlx_command *mc;
1840 struct mlxd_softc *mlxd;
1841 struct mlx_softc *sc;
1842 struct bio *bp;
1843 int blkcount;
1844 int driveno;
1845 int cmd;
1846
1847 mc = (struct mlx_command *)arg;
1848 mlx_setup_dmamap(mc, segs, nsegments, error);
1849
1850 sc = mc->mc_sc;
1851 bp = mc->mc_private;
1852
1853 if (bp->bio_cmd == BIO_READ) {
1854 mc->mc_flags |= MLX_CMD_DATAIN;
1855 cmd = MLX_CMD_READSG;
1856 } else {
1857 mc->mc_flags |= MLX_CMD_DATAOUT;
1858 cmd = MLX_CMD_WRITESG;
1859 }
1860
1861 /* build a suitable I/O command (assumes 512-byte rounded transfers) */
1862 mlxd = bp->bio_disk->d_drv1;
1863 driveno = mlxd->mlxd_drive - sc->mlx_sysdrive;
1864 blkcount = (bp->bio_bcount + MLX_BLKSIZE - 1) / MLX_BLKSIZE;
1865
1866 if ((bp->bio_pblkno + blkcount) > sc->mlx_sysdrive[driveno].ms_size)
1867 device_printf(sc->mlx_dev,
1868 "I/O beyond end of unit (%lld,%d > %lu)\n",
1869 (long long)bp->bio_pblkno, blkcount,
1870 (u_long)sc->mlx_sysdrive[driveno].ms_size);
1871
1872 /*
1873 * Build the I/O command. Note that the SG list type bits are set to zero,
1874 * denoting the format of SG list that we are using.
1875 */
1876 if (sc->mlx_iftype == MLX_IFTYPE_2) {
1877 mlx_make_type1(mc, (cmd == MLX_CMD_WRITESG) ? MLX_CMD_WRITESG_OLD :
1878 MLX_CMD_READSG_OLD,
1879 blkcount & 0xff, /* xfer length low byte */
1880 bp->bio_pblkno, /* physical block number */
1881 driveno, /* target drive number */
1882 mc->mc_sgphys, /* location of SG list */
1883 mc->mc_nsgent & 0x3f); /* size of SG list */
1884 } else {
1885 mlx_make_type5(mc, cmd,
1886 blkcount & 0xff, /* xfer length low byte */
1887 (driveno << 3) | ((blkcount >> 8) & 0x07),
1888 /* target+length high 3 bits */
1889 bp->bio_pblkno, /* physical block number */
1890 mc->mc_sgphys, /* location of SG list */
1891 mc->mc_nsgent & 0x3f); /* size of SG list */
1892 }
1893
1894 /* try to give command to controller */
1895 if (mlx_start(mc) != 0) {
1896 /* fail the command */
1897 mc->mc_status = MLX_STATUS_WEDGED;
1898 mlx_completeio(mc);
1899 }
1900
1901 sc->mlx_state &= ~MLX_STATE_QFROZEN;
1902 }
1903
1904 /********************************************************************************
1905 * Pull as much work off the softc's work queue as possible and give it to the
1906 * controller. Leave a couple of slots free for emergencies.
1907 */
1908 static void
mlx_startio(struct mlx_softc * sc)1909 mlx_startio(struct mlx_softc *sc)
1910 {
1911 struct mlx_command *mc;
1912 struct bio *bp;
1913 int error;
1914
1915 MLX_IO_ASSERT_LOCKED(sc);
1916
1917 /* spin until something prevents us from doing any work */
1918 for (;;) {
1919 if (sc->mlx_state & MLX_STATE_QFROZEN)
1920 break;
1921
1922 /* see if there's work to be done */
1923 if ((bp = bioq_first(&sc->mlx_bioq)) == NULL)
1924 break;
1925 /* get a command */
1926 if ((mc = mlx_alloccmd(sc)) == NULL)
1927 break;
1928 /* get a slot for the command */
1929 if (mlx_getslot(mc) != 0) {
1930 mlx_releasecmd(mc);
1931 break;
1932 }
1933 /* get the buf containing our work */
1934 bioq_remove(&sc->mlx_bioq, bp);
1935 sc->mlx_waitbufs--;
1936
1937 /* connect the buf to the command */
1938 mc->mc_complete = mlx_completeio;
1939 mc->mc_private = bp;
1940 mc->mc_data = bp->bio_data;
1941 mc->mc_length = bp->bio_bcount;
1942
1943 /* map the command so the controller can work with it */
1944 error = bus_dmamap_load(sc->mlx_buffer_dmat, mc->mc_dmamap, mc->mc_data,
1945 mc->mc_length, mlx_startio_cb, mc, 0);
1946 if (error == EINPROGRESS) {
1947 sc->mlx_state |= MLX_STATE_QFROZEN;
1948 break;
1949 }
1950 }
1951 }
1952
1953 /********************************************************************************
1954 * Handle completion of an I/O command.
1955 */
1956 static void
mlx_completeio(struct mlx_command * mc)1957 mlx_completeio(struct mlx_command *mc)
1958 {
1959 struct mlx_softc *sc = mc->mc_sc;
1960 struct bio *bp = mc->mc_private;
1961 struct mlxd_softc *mlxd = bp->bio_disk->d_drv1;
1962
1963 MLX_IO_ASSERT_LOCKED(sc);
1964 if (mc->mc_status != MLX_STATUS_OK) { /* could be more verbose here? */
1965 bp->bio_error = EIO;
1966 bp->bio_flags |= BIO_ERROR;
1967
1968 switch(mc->mc_status) {
1969 case MLX_STATUS_RDWROFFLINE: /* system drive has gone offline */
1970 device_printf(mlxd->mlxd_dev, "drive offline\n");
1971 /* should signal this with a return code */
1972 mlxd->mlxd_drive->ms_state = MLX_SYSD_OFFLINE;
1973 break;
1974
1975 default: /* other I/O error */
1976 device_printf(sc->mlx_dev, "I/O error - %s\n", mlx_diagnose_command(mc));
1977 #if 0
1978 device_printf(sc->mlx_dev, " b_bcount %ld blkcount %ld b_pblkno %d\n",
1979 bp->bio_bcount, bp->bio_bcount / MLX_BLKSIZE, bp->bio_pblkno);
1980 device_printf(sc->mlx_dev, " %13D\n", mc->mc_mailbox, " ");
1981 #endif
1982 break;
1983 }
1984 }
1985 mlx_releasecmd(mc);
1986 mlxd_intr(bp);
1987 }
1988
1989 void
mlx_user_cb(void * arg,bus_dma_segment_t * segs,int nsegments,int error)1990 mlx_user_cb(void *arg, bus_dma_segment_t *segs, int nsegments, int error)
1991 {
1992 struct mlx_usercommand *mu;
1993 struct mlx_command *mc;
1994 struct mlx_dcdb *dcdb;
1995
1996 mc = (struct mlx_command *)arg;
1997 if (error)
1998 return;
1999
2000 mlx_setup_dmamap(mc, segs, nsegments, error);
2001
2002 mu = (struct mlx_usercommand *)mc->mc_private;
2003 dcdb = NULL;
2004
2005 /*
2006 * If this is a passthrough SCSI command, the DCDB is packed at the
2007 * beginning of the data area. Fix up the DCDB to point to the correct
2008 * physical address and override any bufptr supplied by the caller since
2009 * we know what it's meant to be.
2010 */
2011 if (mc->mc_mailbox[0] == MLX_CMD_DIRECT_CDB) {
2012 dcdb = (struct mlx_dcdb *)mc->mc_data;
2013 dcdb->dcdb_physaddr = mc->mc_dataphys + sizeof(*dcdb);
2014 mu->mu_bufptr = 8;
2015 }
2016
2017 /*
2018 * If there's a data buffer, fix up the command's buffer pointer.
2019 */
2020 if (mu->mu_datasize > 0) {
2021 mc->mc_mailbox[mu->mu_bufptr ] = mc->mc_dataphys & 0xff;
2022 mc->mc_mailbox[mu->mu_bufptr + 1] = (mc->mc_dataphys >> 8) & 0xff;
2023 mc->mc_mailbox[mu->mu_bufptr + 2] = (mc->mc_dataphys >> 16) & 0xff;
2024 mc->mc_mailbox[mu->mu_bufptr + 3] = (mc->mc_dataphys >> 24) & 0xff;
2025 }
2026 debug(0, "command fixup");
2027
2028 /* submit the command and wait */
2029 if (mlx_wait_command(mc) != 0)
2030 return;
2031
2032 }
2033
2034 /********************************************************************************
2035 * Take a command from user-space and try to run it.
2036 *
2037 * XXX Note that this can't perform very much in the way of error checking, and
2038 * as such, applications _must_ be considered trustworthy.
2039 * XXX Commands using S/G for data are not supported.
2040 */
2041 static int
mlx_user_command(struct mlx_softc * sc,struct mlx_usercommand * mu)2042 mlx_user_command(struct mlx_softc *sc, struct mlx_usercommand *mu)
2043 {
2044 struct mlx_command *mc;
2045 void *kbuf;
2046 int error;
2047
2048 debug_called(0);
2049
2050 kbuf = NULL;
2051 mc = NULL;
2052 error = ENOMEM;
2053
2054 /* get ourselves a command and copy in from user space */
2055 MLX_IO_LOCK(sc);
2056 if ((mc = mlx_alloccmd(sc)) == NULL) {
2057 MLX_IO_UNLOCK(sc);
2058 return(error);
2059 }
2060 bcopy(mu->mu_command, mc->mc_mailbox, sizeof(mc->mc_mailbox));
2061 debug(0, "got command buffer");
2062
2063 /*
2064 * if we need a buffer for data transfer, allocate one and copy in its
2065 * initial contents
2066 */
2067 if (mu->mu_datasize > 0) {
2068 if (mu->mu_datasize > MLX_MAXPHYS) {
2069 error = EINVAL;
2070 goto out;
2071 }
2072 MLX_IO_UNLOCK(sc);
2073 if (((kbuf = malloc(mu->mu_datasize, M_DEVBUF, M_WAITOK)) == NULL) ||
2074 (error = copyin(mu->mu_buf, kbuf, mu->mu_datasize))) {
2075 MLX_IO_LOCK(sc);
2076 goto out;
2077 }
2078 MLX_IO_LOCK(sc);
2079 debug(0, "got kernel buffer");
2080 }
2081
2082 /* get a command slot */
2083 if (mlx_getslot(mc))
2084 goto out;
2085 debug(0, "got a slot");
2086
2087 if (mu->mu_datasize > 0) {
2088
2089 /* range check the pointer to physical buffer address */
2090 if ((mu->mu_bufptr < 0) || (mu->mu_bufptr > (sizeof(mu->mu_command) -
2091 sizeof(u_int32_t)))) {
2092 error = EINVAL;
2093 goto out;
2094 }
2095 }
2096
2097 /* map the command so the controller can see it */
2098 mc->mc_data = kbuf;
2099 mc->mc_length = mu->mu_datasize;
2100 mc->mc_private = mu;
2101 error = bus_dmamap_load(sc->mlx_buffer_dmat, mc->mc_dmamap, mc->mc_data,
2102 mc->mc_length, mlx_user_cb, mc, BUS_DMA_NOWAIT);
2103 if (error)
2104 goto out;
2105
2106 /* copy out status and data */
2107 mu->mu_status = mc->mc_status;
2108 if (mu->mu_datasize > 0) {
2109 MLX_IO_UNLOCK(sc);
2110 error = copyout(kbuf, mu->mu_buf, mu->mu_datasize);
2111 MLX_IO_LOCK(sc);
2112 }
2113
2114 out:
2115 mlx_releasecmd(mc);
2116 MLX_IO_UNLOCK(sc);
2117 if (kbuf != NULL)
2118 free(kbuf, M_DEVBUF);
2119 return(error);
2120 }
2121
2122 /********************************************************************************
2123 ********************************************************************************
2124 Command I/O to Controller
2125 ********************************************************************************
2126 ********************************************************************************/
2127
2128 /********************************************************************************
2129 * Find a free command slot for (mc).
2130 *
2131 * Don't hand out a slot to a normal-priority command unless there are at least
2132 * 4 slots free for priority commands.
2133 */
2134 static int
mlx_getslot(struct mlx_command * mc)2135 mlx_getslot(struct mlx_command *mc)
2136 {
2137 struct mlx_softc *sc = mc->mc_sc;
2138 int slot, limit;
2139
2140 debug_called(1);
2141
2142 MLX_IO_ASSERT_LOCKED(sc);
2143
2144 /*
2145 * Enforce slot-usage limit, if we have the required information.
2146 */
2147 if (sc->mlx_enq2 != NULL) {
2148 limit = sc->mlx_enq2->me_max_commands;
2149 } else {
2150 limit = 2;
2151 }
2152 if (sc->mlx_busycmds >= ((mc->mc_flags & MLX_CMD_PRIORITY) ? limit : limit - 4))
2153 return(EBUSY);
2154
2155 /*
2156 * Allocate an outstanding command slot
2157 *
2158 * XXX linear search is slow
2159 */
2160 for (slot = 0; slot < limit; slot++) {
2161 debug(2, "try slot %d", slot);
2162 if (sc->mlx_busycmd[slot] == NULL)
2163 break;
2164 }
2165 if (slot < limit) {
2166 sc->mlx_busycmd[slot] = mc;
2167 sc->mlx_busycmds++;
2168 }
2169
2170 /* out of slots? */
2171 if (slot >= limit)
2172 return(EBUSY);
2173
2174 debug(2, "got slot %d", slot);
2175 mc->mc_slot = slot;
2176 return(0);
2177 }
2178
2179 /********************************************************************************
2180 * Map/unmap (mc)'s data in the controller's addressable space.
2181 */
2182 static void
mlx_setup_dmamap(struct mlx_command * mc,bus_dma_segment_t * segs,int nsegments,int error)2183 mlx_setup_dmamap(struct mlx_command *mc, bus_dma_segment_t *segs, int nsegments,
2184 int error)
2185 {
2186 struct mlx_softc *sc = mc->mc_sc;
2187 struct mlx_sgentry *sg;
2188 int i;
2189
2190 debug_called(1);
2191
2192 /* XXX should be unnecessary */
2193 if (sc->mlx_enq2 && (nsegments > sc->mlx_enq2->me_max_sg))
2194 panic("MLX: too many s/g segments (%d, max %d)", nsegments,
2195 sc->mlx_enq2->me_max_sg);
2196
2197 /* get base address of s/g table */
2198 sg = sc->mlx_sgtable + (mc->mc_slot * MLX_NSEG);
2199
2200 /* save s/g table information in command */
2201 mc->mc_nsgent = nsegments;
2202 mc->mc_sgphys = sc->mlx_sgbusaddr +
2203 (mc->mc_slot * MLX_NSEG * sizeof(struct mlx_sgentry));
2204 mc->mc_dataphys = segs[0].ds_addr;
2205
2206 /* populate s/g table */
2207 for (i = 0; i < nsegments; i++, sg++) {
2208 sg->sg_addr = segs[i].ds_addr;
2209 sg->sg_count = segs[i].ds_len;
2210 }
2211
2212 /* Make sure the buffers are visible on the bus. */
2213 if (mc->mc_flags & MLX_CMD_DATAIN)
2214 bus_dmamap_sync(sc->mlx_buffer_dmat, mc->mc_dmamap,
2215 BUS_DMASYNC_PREREAD);
2216 if (mc->mc_flags & MLX_CMD_DATAOUT)
2217 bus_dmamap_sync(sc->mlx_buffer_dmat, mc->mc_dmamap,
2218 BUS_DMASYNC_PREWRITE);
2219 }
2220
2221 static void
mlx_unmapcmd(struct mlx_command * mc)2222 mlx_unmapcmd(struct mlx_command *mc)
2223 {
2224 struct mlx_softc *sc = mc->mc_sc;
2225
2226 debug_called(1);
2227
2228 /* if the command involved data at all */
2229 if (mc->mc_data != NULL) {
2230
2231 if (mc->mc_flags & MLX_CMD_DATAIN)
2232 bus_dmamap_sync(sc->mlx_buffer_dmat, mc->mc_dmamap, BUS_DMASYNC_POSTREAD);
2233 if (mc->mc_flags & MLX_CMD_DATAOUT)
2234 bus_dmamap_sync(sc->mlx_buffer_dmat, mc->mc_dmamap, BUS_DMASYNC_POSTWRITE);
2235
2236 bus_dmamap_unload(sc->mlx_buffer_dmat, mc->mc_dmamap);
2237 }
2238 }
2239
2240 /********************************************************************************
2241 * Try to deliver (mc) to the controller.
2242 *
2243 * Can be called at any interrupt level, with or without interrupts enabled.
2244 */
2245 static int
mlx_start(struct mlx_command * mc)2246 mlx_start(struct mlx_command *mc)
2247 {
2248 struct mlx_softc *sc = mc->mc_sc;
2249 int i;
2250
2251 debug_called(1);
2252
2253 /* save the slot number as ident so we can handle this command when complete */
2254 mc->mc_mailbox[0x1] = mc->mc_slot;
2255
2256 /* mark the command as currently being processed */
2257 mc->mc_status = MLX_STATUS_BUSY;
2258
2259 /* set a default 60-second timeout XXX tunable? XXX not currently used */
2260 mc->mc_timeout = time_second + 60;
2261
2262 /* spin waiting for the mailbox */
2263 for (i = 100000; i > 0; i--) {
2264 if (sc->mlx_tryqueue(sc, mc)) {
2265 /* move command to work queue */
2266 TAILQ_INSERT_TAIL(&sc->mlx_work, mc, mc_link);
2267 return (0);
2268 } else if (i > 1)
2269 mlx_done(sc, 0);
2270 }
2271
2272 /*
2273 * We couldn't get the controller to take the command. Revoke the slot
2274 * that the command was given and return it with a bad status.
2275 */
2276 sc->mlx_busycmd[mc->mc_slot] = NULL;
2277 device_printf(sc->mlx_dev, "controller wedged (not taking commands)\n");
2278 mc->mc_status = MLX_STATUS_WEDGED;
2279 mlx_complete(sc);
2280 return(EIO);
2281 }
2282
2283 /********************************************************************************
2284 * Poll the controller (sc) for completed commands.
2285 * Update command status and free slots for reuse. If any slots were freed,
2286 * new commands may be posted.
2287 *
2288 * Returns nonzero if one or more commands were completed.
2289 */
2290 static int
mlx_done(struct mlx_softc * sc,int startio)2291 mlx_done(struct mlx_softc *sc, int startio)
2292 {
2293 struct mlx_command *mc;
2294 int result;
2295 u_int8_t slot;
2296 u_int16_t status;
2297
2298 debug_called(2);
2299 MLX_IO_ASSERT_LOCKED(sc);
2300
2301 result = 0;
2302
2303 /* loop collecting completed commands */
2304 for (;;) {
2305 /* poll for a completed command's identifier and status */
2306 if (sc->mlx_findcomplete(sc, &slot, &status)) {
2307 result = 1;
2308 mc = sc->mlx_busycmd[slot]; /* find command */
2309 if (mc != NULL) { /* paranoia */
2310 if (mc->mc_status == MLX_STATUS_BUSY) {
2311 mc->mc_status = status; /* save status */
2312
2313 /* free slot for reuse */
2314 sc->mlx_busycmd[slot] = NULL;
2315 sc->mlx_busycmds--;
2316 } else {
2317 device_printf(sc->mlx_dev, "duplicate done event for slot %d\n", slot);
2318 }
2319 } else {
2320 device_printf(sc->mlx_dev, "done event for nonbusy slot %d\n", slot);
2321 }
2322 } else {
2323 break;
2324 }
2325 }
2326
2327 /* if we've completed any commands, try posting some more */
2328 if (result && startio)
2329 mlx_startio(sc);
2330
2331 /* handle completion and timeouts */
2332 mlx_complete(sc);
2333
2334 return(result);
2335 }
2336
2337 /********************************************************************************
2338 * Perform post-completion processing for commands on (sc).
2339 */
2340 static void
mlx_complete(struct mlx_softc * sc)2341 mlx_complete(struct mlx_softc *sc)
2342 {
2343 struct mlx_command *mc, *nc;
2344
2345 debug_called(2);
2346 MLX_IO_ASSERT_LOCKED(sc);
2347
2348 /* scan the list of busy/done commands */
2349 mc = TAILQ_FIRST(&sc->mlx_work);
2350 while (mc != NULL) {
2351 nc = TAILQ_NEXT(mc, mc_link);
2352
2353 /* Command has been completed in some fashion */
2354 if (mc->mc_status != MLX_STATUS_BUSY) {
2355
2356 /* unmap the command's data buffer */
2357 mlx_unmapcmd(mc);
2358 /*
2359 * Does the command have a completion handler?
2360 */
2361 if (mc->mc_complete != NULL) {
2362 /* remove from list and give to handler */
2363 TAILQ_REMOVE(&sc->mlx_work, mc, mc_link);
2364 mc->mc_complete(mc);
2365
2366 /*
2367 * Is there a sleeper waiting on this command?
2368 */
2369 } else if (mc->mc_private != NULL) { /* sleeping caller wants to know about it */
2370
2371 /* remove from list and wake up sleeper */
2372 TAILQ_REMOVE(&sc->mlx_work, mc, mc_link);
2373 wakeup_one(mc->mc_private);
2374
2375 /*
2376 * Leave the command for a caller that's polling for it.
2377 */
2378 } else {
2379 }
2380 }
2381 mc = nc;
2382 }
2383 }
2384
2385 /********************************************************************************
2386 ********************************************************************************
2387 Command Buffer Management
2388 ********************************************************************************
2389 ********************************************************************************/
2390
2391 /********************************************************************************
2392 * Get a new command buffer.
2393 *
2394 * This may return NULL in low-memory cases.
2395 *
2396 * Note that using malloc() is expensive (the command buffer is << 1 page) but
2397 * necessary if we are to be a loadable module before the zone allocator is fixed.
2398 *
2399 * If possible, we recycle a command buffer that's been used before.
2400 *
2401 * XXX Note that command buffers are not cleaned out - it is the caller's
2402 * responsibility to ensure that all required fields are filled in before
2403 * using a buffer.
2404 */
2405 static struct mlx_command *
mlx_alloccmd(struct mlx_softc * sc)2406 mlx_alloccmd(struct mlx_softc *sc)
2407 {
2408 struct mlx_command *mc;
2409 int error;
2410
2411 debug_called(1);
2412
2413 MLX_IO_ASSERT_LOCKED(sc);
2414 if ((mc = TAILQ_FIRST(&sc->mlx_freecmds)) != NULL)
2415 TAILQ_REMOVE(&sc->mlx_freecmds, mc, mc_link);
2416
2417 /* allocate a new command buffer? */
2418 if (mc == NULL) {
2419 mc = (struct mlx_command *)malloc(sizeof(*mc), M_DEVBUF, M_NOWAIT | M_ZERO);
2420 if (mc != NULL) {
2421 mc->mc_sc = sc;
2422 error = bus_dmamap_create(sc->mlx_buffer_dmat, 0, &mc->mc_dmamap);
2423 if (error) {
2424 free(mc, M_DEVBUF);
2425 return(NULL);
2426 }
2427 }
2428 }
2429 return(mc);
2430 }
2431
2432 /********************************************************************************
2433 * Release a command buffer for recycling.
2434 *
2435 * XXX It might be a good idea to limit the number of commands we save for reuse
2436 * if it's shown that this list bloats out massively.
2437 */
2438 static void
mlx_releasecmd(struct mlx_command * mc)2439 mlx_releasecmd(struct mlx_command *mc)
2440 {
2441
2442 debug_called(1);
2443
2444 MLX_IO_ASSERT_LOCKED(mc->mc_sc);
2445 TAILQ_INSERT_HEAD(&mc->mc_sc->mlx_freecmds, mc, mc_link);
2446 }
2447
2448 /********************************************************************************
2449 * Permanently discard a command buffer.
2450 */
2451 static void
mlx_freecmd(struct mlx_command * mc)2452 mlx_freecmd(struct mlx_command *mc)
2453 {
2454 struct mlx_softc *sc = mc->mc_sc;
2455
2456 debug_called(1);
2457 bus_dmamap_destroy(sc->mlx_buffer_dmat, mc->mc_dmamap);
2458 free(mc, M_DEVBUF);
2459 }
2460
2461
2462 /********************************************************************************
2463 ********************************************************************************
2464 Type 3 interface accessor methods
2465 ********************************************************************************
2466 ********************************************************************************/
2467
2468 /********************************************************************************
2469 * Try to give (mc) to the controller. Returns 1 if successful, 0 on failure
2470 * (the controller is not ready to take a command).
2471 */
2472 static int
mlx_v3_tryqueue(struct mlx_softc * sc,struct mlx_command * mc)2473 mlx_v3_tryqueue(struct mlx_softc *sc, struct mlx_command *mc)
2474 {
2475 int i;
2476
2477 debug_called(2);
2478 MLX_IO_ASSERT_LOCKED(sc);
2479
2480 /* ready for our command? */
2481 if (!(MLX_V3_GET_IDBR(sc) & MLX_V3_IDB_FULL)) {
2482 /* copy mailbox data to window */
2483 for (i = 0; i < 13; i++)
2484 MLX_V3_PUT_MAILBOX(sc, i, mc->mc_mailbox[i]);
2485
2486 /* post command */
2487 MLX_V3_PUT_IDBR(sc, MLX_V3_IDB_FULL);
2488 return(1);
2489 }
2490 return(0);
2491 }
2492
2493 /********************************************************************************
2494 * See if a command has been completed, if so acknowledge its completion
2495 * and recover the slot number and status code.
2496 */
2497 static int
mlx_v3_findcomplete(struct mlx_softc * sc,u_int8_t * slot,u_int16_t * status)2498 mlx_v3_findcomplete(struct mlx_softc *sc, u_int8_t *slot, u_int16_t *status)
2499 {
2500
2501 debug_called(2);
2502 MLX_IO_ASSERT_LOCKED(sc);
2503
2504 /* status available? */
2505 if (MLX_V3_GET_ODBR(sc) & MLX_V3_ODB_SAVAIL) {
2506 *slot = MLX_V3_GET_STATUS_IDENT(sc); /* get command identifier */
2507 *status = MLX_V3_GET_STATUS(sc); /* get status */
2508
2509 /* acknowledge completion */
2510 MLX_V3_PUT_ODBR(sc, MLX_V3_ODB_SAVAIL);
2511 MLX_V3_PUT_IDBR(sc, MLX_V3_IDB_SACK);
2512 return(1);
2513 }
2514 return(0);
2515 }
2516
2517 /********************************************************************************
2518 * Enable/disable interrupts as requested. (No acknowledge required)
2519 */
2520 static void
mlx_v3_intaction(struct mlx_softc * sc,int action)2521 mlx_v3_intaction(struct mlx_softc *sc, int action)
2522 {
2523 debug_called(1);
2524 MLX_IO_ASSERT_LOCKED(sc);
2525
2526 switch(action) {
2527 case MLX_INTACTION_DISABLE:
2528 MLX_V3_PUT_IER(sc, 0);
2529 sc->mlx_state &= ~MLX_STATE_INTEN;
2530 break;
2531 case MLX_INTACTION_ENABLE:
2532 MLX_V3_PUT_IER(sc, 1);
2533 sc->mlx_state |= MLX_STATE_INTEN;
2534 break;
2535 }
2536 }
2537
2538 /********************************************************************************
2539 * Poll for firmware error codes during controller initialisation.
2540 * Returns 0 if initialisation is complete, 1 if still in progress but no
2541 * error has been fetched, 2 if an error has been retrieved.
2542 */
2543 static int
mlx_v3_fw_handshake(struct mlx_softc * sc,int * error,int * param1,int * param2,int first)2544 mlx_v3_fw_handshake(struct mlx_softc *sc, int *error, int *param1, int *param2,
2545 int first)
2546 {
2547 u_int8_t fwerror;
2548
2549 debug_called(2);
2550
2551 /* first time around, clear any hardware completion status */
2552 if (first) {
2553 MLX_V3_PUT_IDBR(sc, MLX_V3_IDB_SACK);
2554 DELAY(1000);
2555 }
2556
2557 /* init in progress? */
2558 if (!(MLX_V3_GET_IDBR(sc) & MLX_V3_IDB_INIT_BUSY))
2559 return(0);
2560
2561 /* test error value */
2562 fwerror = MLX_V3_GET_FWERROR(sc);
2563 if (!(fwerror & MLX_V3_FWERROR_PEND))
2564 return(1);
2565
2566 /* mask status pending bit, fetch status */
2567 *error = fwerror & ~MLX_V3_FWERROR_PEND;
2568 *param1 = MLX_V3_GET_FWERROR_PARAM1(sc);
2569 *param2 = MLX_V3_GET_FWERROR_PARAM2(sc);
2570
2571 /* acknowledge */
2572 MLX_V3_PUT_FWERROR(sc, 0);
2573
2574 return(2);
2575 }
2576
2577 /********************************************************************************
2578 ********************************************************************************
2579 Type 4 interface accessor methods
2580 ********************************************************************************
2581 ********************************************************************************/
2582
2583 /********************************************************************************
2584 * Try to give (mc) to the controller. Returns 1 if successful, 0 on failure
2585 * (the controller is not ready to take a command).
2586 */
2587 static int
mlx_v4_tryqueue(struct mlx_softc * sc,struct mlx_command * mc)2588 mlx_v4_tryqueue(struct mlx_softc *sc, struct mlx_command *mc)
2589 {
2590 int i;
2591
2592 debug_called(2);
2593 MLX_IO_ASSERT_LOCKED(sc);
2594
2595 /* ready for our command? */
2596 if (!(MLX_V4_GET_IDBR(sc) & MLX_V4_IDB_FULL)) {
2597 /* copy mailbox data to window */
2598 for (i = 0; i < 13; i++)
2599 MLX_V4_PUT_MAILBOX(sc, i, mc->mc_mailbox[i]);
2600
2601 /* memory-mapped controller, so issue a write barrier to ensure the mailbox is filled */
2602 bus_barrier(sc->mlx_mem, MLX_V4_MAILBOX, MLX_V4_MAILBOX_LENGTH,
2603 BUS_SPACE_BARRIER_WRITE);
2604
2605 /* post command */
2606 MLX_V4_PUT_IDBR(sc, MLX_V4_IDB_HWMBOX_CMD);
2607 return(1);
2608 }
2609 return(0);
2610 }
2611
2612 /********************************************************************************
2613 * See if a command has been completed, if so acknowledge its completion
2614 * and recover the slot number and status code.
2615 */
2616 static int
mlx_v4_findcomplete(struct mlx_softc * sc,u_int8_t * slot,u_int16_t * status)2617 mlx_v4_findcomplete(struct mlx_softc *sc, u_int8_t *slot, u_int16_t *status)
2618 {
2619
2620 debug_called(2);
2621 MLX_IO_ASSERT_LOCKED(sc);
2622
2623 /* status available? */
2624 if (MLX_V4_GET_ODBR(sc) & MLX_V4_ODB_HWSAVAIL) {
2625 *slot = MLX_V4_GET_STATUS_IDENT(sc); /* get command identifier */
2626 *status = MLX_V4_GET_STATUS(sc); /* get status */
2627
2628 /* acknowledge completion */
2629 MLX_V4_PUT_ODBR(sc, MLX_V4_ODB_HWMBOX_ACK);
2630 MLX_V4_PUT_IDBR(sc, MLX_V4_IDB_SACK);
2631 return(1);
2632 }
2633 return(0);
2634 }
2635
2636 /********************************************************************************
2637 * Enable/disable interrupts as requested.
2638 */
2639 static void
mlx_v4_intaction(struct mlx_softc * sc,int action)2640 mlx_v4_intaction(struct mlx_softc *sc, int action)
2641 {
2642 debug_called(1);
2643 MLX_IO_ASSERT_LOCKED(sc);
2644
2645 switch(action) {
2646 case MLX_INTACTION_DISABLE:
2647 MLX_V4_PUT_IER(sc, MLX_V4_IER_MASK | MLX_V4_IER_DISINT);
2648 sc->mlx_state &= ~MLX_STATE_INTEN;
2649 break;
2650 case MLX_INTACTION_ENABLE:
2651 MLX_V4_PUT_IER(sc, MLX_V4_IER_MASK & ~MLX_V4_IER_DISINT);
2652 sc->mlx_state |= MLX_STATE_INTEN;
2653 break;
2654 }
2655 }
2656
2657 /********************************************************************************
2658 * Poll for firmware error codes during controller initialisation.
2659 * Returns 0 if initialisation is complete, 1 if still in progress but no
2660 * error has been fetched, 2 if an error has been retrieved.
2661 */
2662 static int
mlx_v4_fw_handshake(struct mlx_softc * sc,int * error,int * param1,int * param2,int first)2663 mlx_v4_fw_handshake(struct mlx_softc *sc, int *error, int *param1, int *param2,
2664 int first)
2665 {
2666 u_int8_t fwerror;
2667
2668 debug_called(2);
2669
2670 /* first time around, clear any hardware completion status */
2671 if (first) {
2672 MLX_V4_PUT_IDBR(sc, MLX_V4_IDB_SACK);
2673 DELAY(1000);
2674 }
2675
2676 /* init in progress? */
2677 if (!(MLX_V4_GET_IDBR(sc) & MLX_V4_IDB_INIT_BUSY))
2678 return(0);
2679
2680 /* test error value */
2681 fwerror = MLX_V4_GET_FWERROR(sc);
2682 if (!(fwerror & MLX_V4_FWERROR_PEND))
2683 return(1);
2684
2685 /* mask status pending bit, fetch status */
2686 *error = fwerror & ~MLX_V4_FWERROR_PEND;
2687 *param1 = MLX_V4_GET_FWERROR_PARAM1(sc);
2688 *param2 = MLX_V4_GET_FWERROR_PARAM2(sc);
2689
2690 /* acknowledge */
2691 MLX_V4_PUT_FWERROR(sc, 0);
2692
2693 return(2);
2694 }
2695
2696 /********************************************************************************
2697 ********************************************************************************
2698 Type 5 interface accessor methods
2699 ********************************************************************************
2700 ********************************************************************************/
2701
2702 /********************************************************************************
2703 * Try to give (mc) to the controller. Returns 1 if successful, 0 on failure
2704 * (the controller is not ready to take a command).
2705 */
2706 static int
mlx_v5_tryqueue(struct mlx_softc * sc,struct mlx_command * mc)2707 mlx_v5_tryqueue(struct mlx_softc *sc, struct mlx_command *mc)
2708 {
2709 int i;
2710
2711 debug_called(2);
2712 MLX_IO_ASSERT_LOCKED(sc);
2713
2714 /* ready for our command? */
2715 if (MLX_V5_GET_IDBR(sc) & MLX_V5_IDB_EMPTY) {
2716 /* copy mailbox data to window */
2717 for (i = 0; i < 13; i++)
2718 MLX_V5_PUT_MAILBOX(sc, i, mc->mc_mailbox[i]);
2719
2720 /* post command */
2721 MLX_V5_PUT_IDBR(sc, MLX_V5_IDB_HWMBOX_CMD);
2722 return(1);
2723 }
2724 return(0);
2725 }
2726
2727 /********************************************************************************
2728 * See if a command has been completed, if so acknowledge its completion
2729 * and recover the slot number and status code.
2730 */
2731 static int
mlx_v5_findcomplete(struct mlx_softc * sc,u_int8_t * slot,u_int16_t * status)2732 mlx_v5_findcomplete(struct mlx_softc *sc, u_int8_t *slot, u_int16_t *status)
2733 {
2734
2735 debug_called(2);
2736 MLX_IO_ASSERT_LOCKED(sc);
2737
2738 /* status available? */
2739 if (MLX_V5_GET_ODBR(sc) & MLX_V5_ODB_HWSAVAIL) {
2740 *slot = MLX_V5_GET_STATUS_IDENT(sc); /* get command identifier */
2741 *status = MLX_V5_GET_STATUS(sc); /* get status */
2742
2743 /* acknowledge completion */
2744 MLX_V5_PUT_ODBR(sc, MLX_V5_ODB_HWMBOX_ACK);
2745 MLX_V5_PUT_IDBR(sc, MLX_V5_IDB_SACK);
2746 return(1);
2747 }
2748 return(0);
2749 }
2750
2751 /********************************************************************************
2752 * Enable/disable interrupts as requested.
2753 */
2754 static void
mlx_v5_intaction(struct mlx_softc * sc,int action)2755 mlx_v5_intaction(struct mlx_softc *sc, int action)
2756 {
2757 debug_called(1);
2758 MLX_IO_ASSERT_LOCKED(sc);
2759
2760 switch(action) {
2761 case MLX_INTACTION_DISABLE:
2762 MLX_V5_PUT_IER(sc, 0xff & MLX_V5_IER_DISINT);
2763 sc->mlx_state &= ~MLX_STATE_INTEN;
2764 break;
2765 case MLX_INTACTION_ENABLE:
2766 MLX_V5_PUT_IER(sc, 0xff & ~MLX_V5_IER_DISINT);
2767 sc->mlx_state |= MLX_STATE_INTEN;
2768 break;
2769 }
2770 }
2771
2772 /********************************************************************************
2773 * Poll for firmware error codes during controller initialisation.
2774 * Returns 0 if initialisation is complete, 1 if still in progress but no
2775 * error has been fetched, 2 if an error has been retrieved.
2776 */
2777 static int
mlx_v5_fw_handshake(struct mlx_softc * sc,int * error,int * param1,int * param2,int first)2778 mlx_v5_fw_handshake(struct mlx_softc *sc, int *error, int *param1, int *param2,
2779 int first)
2780 {
2781 u_int8_t fwerror;
2782
2783 debug_called(2);
2784
2785 /* first time around, clear any hardware completion status */
2786 if (first) {
2787 MLX_V5_PUT_IDBR(sc, MLX_V5_IDB_SACK);
2788 DELAY(1000);
2789 }
2790
2791 /* init in progress? */
2792 if (MLX_V5_GET_IDBR(sc) & MLX_V5_IDB_INIT_DONE)
2793 return(0);
2794
2795 /* test for error value */
2796 fwerror = MLX_V5_GET_FWERROR(sc);
2797 if (!(fwerror & MLX_V5_FWERROR_PEND))
2798 return(1);
2799
2800 /* mask status pending bit, fetch status */
2801 *error = fwerror & ~MLX_V5_FWERROR_PEND;
2802 *param1 = MLX_V5_GET_FWERROR_PARAM1(sc);
2803 *param2 = MLX_V5_GET_FWERROR_PARAM2(sc);
2804
2805 /* acknowledge */
2806 MLX_V5_PUT_FWERROR(sc, 0xff);
2807
2808 return(2);
2809 }
2810
2811 /********************************************************************************
2812 ********************************************************************************
2813 Debugging
2814 ********************************************************************************
2815 ********************************************************************************/
2816
2817 /********************************************************************************
2818 * Return a status message describing (mc)
2819 */
2820 static char *mlx_status_messages[] = {
2821 "normal completion", /* 00 */
2822 "irrecoverable data error", /* 01 */
2823 "drive does not exist, or is offline", /* 02 */
2824 "attempt to write beyond end of drive", /* 03 */
2825 "bad data encountered", /* 04 */
2826 "invalid log entry request", /* 05 */
2827 "attempt to rebuild online drive", /* 06 */
2828 "new disk failed during rebuild", /* 07 */
2829 "invalid channel/target", /* 08 */
2830 "rebuild/check already in progress", /* 09 */
2831 "one or more disks are dead", /* 10 */
2832 "invalid or non-redundant drive", /* 11 */
2833 "channel is busy", /* 12 */
2834 "channel is not stopped", /* 13 */
2835 "rebuild successfully terminated", /* 14 */
2836 "unsupported command", /* 15 */
2837 "check condition received", /* 16 */
2838 "device is busy", /* 17 */
2839 "selection or command timeout", /* 18 */
2840 "command terminated abnormally", /* 19 */
2841 ""
2842 };
2843
2844 static struct
2845 {
2846 int command;
2847 u_int16_t status;
2848 int msg;
2849 } mlx_messages[] = {
2850 {MLX_CMD_READSG, 0x0001, 1},
2851 {MLX_CMD_READSG, 0x0002, 1},
2852 {MLX_CMD_READSG, 0x0105, 3},
2853 {MLX_CMD_READSG, 0x010c, 4},
2854 {MLX_CMD_WRITESG, 0x0001, 1},
2855 {MLX_CMD_WRITESG, 0x0002, 1},
2856 {MLX_CMD_WRITESG, 0x0105, 3},
2857 {MLX_CMD_READSG_OLD, 0x0001, 1},
2858 {MLX_CMD_READSG_OLD, 0x0002, 1},
2859 {MLX_CMD_READSG_OLD, 0x0105, 3},
2860 {MLX_CMD_WRITESG_OLD, 0x0001, 1},
2861 {MLX_CMD_WRITESG_OLD, 0x0002, 1},
2862 {MLX_CMD_WRITESG_OLD, 0x0105, 3},
2863 {MLX_CMD_LOGOP, 0x0105, 5},
2864 {MLX_CMD_REBUILDASYNC, 0x0002, 6},
2865 {MLX_CMD_REBUILDASYNC, 0x0004, 7},
2866 {MLX_CMD_REBUILDASYNC, 0x0105, 8},
2867 {MLX_CMD_REBUILDASYNC, 0x0106, 9},
2868 {MLX_CMD_REBUILDASYNC, 0x0107, 14},
2869 {MLX_CMD_CHECKASYNC, 0x0002, 10},
2870 {MLX_CMD_CHECKASYNC, 0x0105, 11},
2871 {MLX_CMD_CHECKASYNC, 0x0106, 9},
2872 {MLX_CMD_STOPCHANNEL, 0x0106, 12},
2873 {MLX_CMD_STOPCHANNEL, 0x0105, 8},
2874 {MLX_CMD_STARTCHANNEL, 0x0005, 13},
2875 {MLX_CMD_STARTCHANNEL, 0x0105, 8},
2876 {MLX_CMD_DIRECT_CDB, 0x0002, 16},
2877 {MLX_CMD_DIRECT_CDB, 0x0008, 17},
2878 {MLX_CMD_DIRECT_CDB, 0x000e, 18},
2879 {MLX_CMD_DIRECT_CDB, 0x000f, 19},
2880 {MLX_CMD_DIRECT_CDB, 0x0105, 8},
2881
2882 {0, 0x0104, 14},
2883 {-1, 0, 0}
2884 };
2885
2886 static char *
mlx_diagnose_command(struct mlx_command * mc)2887 mlx_diagnose_command(struct mlx_command *mc)
2888 {
2889 static char unkmsg[80];
2890 int i;
2891
2892 /* look up message in table */
2893 for (i = 0; mlx_messages[i].command != -1; i++)
2894 if (((mc->mc_mailbox[0] == mlx_messages[i].command) || (mlx_messages[i].command == 0)) &&
2895 (mc->mc_status == mlx_messages[i].status))
2896 return(mlx_status_messages[mlx_messages[i].msg]);
2897
2898 sprintf(unkmsg, "unknown response 0x%x for command 0x%x", (int)mc->mc_status, (int)mc->mc_mailbox[0]);
2899 return(unkmsg);
2900 }
2901
2902 /*******************************************************************************
2903 * Print a string describing the controller (sc)
2904 */
2905 static struct
2906 {
2907 int hwid;
2908 char *name;
2909 } mlx_controller_names[] = {
2910 {0x01, "960P/PD"},
2911 {0x02, "960PL"},
2912 {0x10, "960PG"},
2913 {0x11, "960PJ"},
2914 {0x12, "960PR"},
2915 {0x13, "960PT"},
2916 {0x14, "960PTL0"},
2917 {0x15, "960PRL"},
2918 {0x16, "960PTL1"},
2919 {0x20, "1164PVX"},
2920 {-1, NULL}
2921 };
2922
2923 static void
mlx_describe_controller(struct mlx_softc * sc)2924 mlx_describe_controller(struct mlx_softc *sc)
2925 {
2926 static char buf[80];
2927 char *model;
2928 int i;
2929
2930 for (i = 0, model = NULL; mlx_controller_names[i].name != NULL; i++) {
2931 if ((sc->mlx_enq2->me_hardware_id & 0xff) == mlx_controller_names[i].hwid) {
2932 model = mlx_controller_names[i].name;
2933 break;
2934 }
2935 }
2936 if (model == NULL) {
2937 sprintf(buf, " model 0x%x", sc->mlx_enq2->me_hardware_id & 0xff);
2938 model = buf;
2939 }
2940 device_printf(sc->mlx_dev, "DAC%s, %d channel%s, firmware %d.%02d-%c-%02d, %dMB RAM\n",
2941 model,
2942 sc->mlx_enq2->me_actual_channels,
2943 sc->mlx_enq2->me_actual_channels > 1 ? "s" : "",
2944 sc->mlx_enq2->me_firmware_id & 0xff,
2945 (sc->mlx_enq2->me_firmware_id >> 8) & 0xff,
2946 (sc->mlx_enq2->me_firmware_id >> 24) & 0xff,
2947 (sc->mlx_enq2->me_firmware_id >> 16) & 0xff,
2948 sc->mlx_enq2->me_mem_size / (1024 * 1024));
2949
2950 if (bootverbose) {
2951 device_printf(sc->mlx_dev, " Hardware ID 0x%08x\n", sc->mlx_enq2->me_hardware_id);
2952 device_printf(sc->mlx_dev, " Firmware ID 0x%08x\n", sc->mlx_enq2->me_firmware_id);
2953 device_printf(sc->mlx_dev, " Configured/Actual channels %d/%d\n", sc->mlx_enq2->me_configured_channels,
2954 sc->mlx_enq2->me_actual_channels);
2955 device_printf(sc->mlx_dev, " Max Targets %d\n", sc->mlx_enq2->me_max_targets);
2956 device_printf(sc->mlx_dev, " Max Tags %d\n", sc->mlx_enq2->me_max_tags);
2957 device_printf(sc->mlx_dev, " Max System Drives %d\n", sc->mlx_enq2->me_max_sys_drives);
2958 device_printf(sc->mlx_dev, " Max Arms %d\n", sc->mlx_enq2->me_max_arms);
2959 device_printf(sc->mlx_dev, " Max Spans %d\n", sc->mlx_enq2->me_max_spans);
2960 device_printf(sc->mlx_dev, " DRAM/cache/flash/NVRAM size %d/%d/%d/%d\n", sc->mlx_enq2->me_mem_size,
2961 sc->mlx_enq2->me_cache_size, sc->mlx_enq2->me_flash_size, sc->mlx_enq2->me_nvram_size);
2962 device_printf(sc->mlx_dev, " DRAM type %d\n", sc->mlx_enq2->me_mem_type);
2963 device_printf(sc->mlx_dev, " Clock Speed %dns\n", sc->mlx_enq2->me_clock_speed);
2964 device_printf(sc->mlx_dev, " Hardware Speed %dns\n", sc->mlx_enq2->me_hardware_speed);
2965 device_printf(sc->mlx_dev, " Max Commands %d\n", sc->mlx_enq2->me_max_commands);
2966 device_printf(sc->mlx_dev, " Max SG Entries %d\n", sc->mlx_enq2->me_max_sg);
2967 device_printf(sc->mlx_dev, " Max DP %d\n", sc->mlx_enq2->me_max_dp);
2968 device_printf(sc->mlx_dev, " Max IOD %d\n", sc->mlx_enq2->me_max_iod);
2969 device_printf(sc->mlx_dev, " Max Comb %d\n", sc->mlx_enq2->me_max_comb);
2970 device_printf(sc->mlx_dev, " Latency %ds\n", sc->mlx_enq2->me_latency);
2971 device_printf(sc->mlx_dev, " SCSI Timeout %ds\n", sc->mlx_enq2->me_scsi_timeout);
2972 device_printf(sc->mlx_dev, " Min Free Lines %d\n", sc->mlx_enq2->me_min_freelines);
2973 device_printf(sc->mlx_dev, " Rate Constant %d\n", sc->mlx_enq2->me_rate_const);
2974 device_printf(sc->mlx_dev, " MAXBLK %d\n", sc->mlx_enq2->me_maxblk);
2975 device_printf(sc->mlx_dev, " Blocking Factor %d sectors\n", sc->mlx_enq2->me_blocking_factor);
2976 device_printf(sc->mlx_dev, " Cache Line Size %d blocks\n", sc->mlx_enq2->me_cacheline);
2977 device_printf(sc->mlx_dev, " SCSI Capability %s%dMHz, %d bit\n",
2978 sc->mlx_enq2->me_scsi_cap & (1<<4) ? "differential " : "",
2979 (1 << ((sc->mlx_enq2->me_scsi_cap >> 2) & 3)) * 10,
2980 8 << (sc->mlx_enq2->me_scsi_cap & 0x3));
2981 device_printf(sc->mlx_dev, " Firmware Build Number %d\n", sc->mlx_enq2->me_firmware_build);
2982 device_printf(sc->mlx_dev, " Fault Management Type %d\n", sc->mlx_enq2->me_fault_mgmt_type);
2983 device_printf(sc->mlx_dev, " Features %b\n", sc->mlx_enq2->me_firmware_features,
2984 "\20\4Background Init\3Read Ahead\2MORE\1Cluster\n");
2985
2986 }
2987 }
2988
2989 /*******************************************************************************
2990 * Emit a string describing the firmware handshake status code, and return a flag
2991 * indicating whether the code represents a fatal error.
2992 *
2993 * Error code interpretations are from the Linux driver, and don't directly match
2994 * the messages printed by Mylex's BIOS. This may change if documentation on the
2995 * codes is forthcoming.
2996 */
2997 static int
mlx_fw_message(struct mlx_softc * sc,int error,int param1,int param2)2998 mlx_fw_message(struct mlx_softc *sc, int error, int param1, int param2)
2999 {
3000 switch(error) {
3001 case 0x00:
3002 device_printf(sc->mlx_dev, "physical drive %d:%d not responding\n", param2, param1);
3003 break;
3004 case 0x08:
3005 /* we could be neater about this and give some indication when we receive more of them */
3006 if (!(sc->mlx_flags & MLX_SPINUP_REPORTED)) {
3007 device_printf(sc->mlx_dev, "spinning up drives...\n");
3008 sc->mlx_flags |= MLX_SPINUP_REPORTED;
3009 }
3010 break;
3011 case 0x30:
3012 device_printf(sc->mlx_dev, "configuration checksum error\n");
3013 break;
3014 case 0x60:
3015 device_printf(sc->mlx_dev, "mirror race recovery failed\n");
3016 break;
3017 case 0x70:
3018 device_printf(sc->mlx_dev, "mirror race recovery in progress\n");
3019 break;
3020 case 0x90:
3021 device_printf(sc->mlx_dev, "physical drive %d:%d COD mismatch\n", param2, param1);
3022 break;
3023 case 0xa0:
3024 device_printf(sc->mlx_dev, "logical drive installation aborted\n");
3025 break;
3026 case 0xb0:
3027 device_printf(sc->mlx_dev, "mirror race on a critical system drive\n");
3028 break;
3029 case 0xd0:
3030 device_printf(sc->mlx_dev, "new controller configuration found\n");
3031 break;
3032 case 0xf0:
3033 device_printf(sc->mlx_dev, "FATAL MEMORY PARITY ERROR\n");
3034 return(1);
3035 default:
3036 device_printf(sc->mlx_dev, "unknown firmware initialisation error %02x:%02x:%02x\n", error, param1, param2);
3037 break;
3038 }
3039 return(0);
3040 }
3041
3042 /********************************************************************************
3043 ********************************************************************************
3044 Utility Functions
3045 ********************************************************************************
3046 ********************************************************************************/
3047
3048 /********************************************************************************
3049 * Find the disk whose unit number is (unit) on this controller
3050 */
3051 static struct mlx_sysdrive *
mlx_findunit(struct mlx_softc * sc,int unit)3052 mlx_findunit(struct mlx_softc *sc, int unit)
3053 {
3054 int i;
3055
3056 /* search system drives */
3057 MLX_CONFIG_ASSERT_LOCKED(sc);
3058 for (i = 0; i < MLX_MAXDRIVES; i++) {
3059 /* is this one attached? */
3060 if (sc->mlx_sysdrive[i].ms_disk != 0) {
3061 /* is this the one? */
3062 if (unit == device_get_unit(sc->mlx_sysdrive[i].ms_disk))
3063 return(&sc->mlx_sysdrive[i]);
3064 }
3065 }
3066 return(NULL);
3067 }
3068