1 /*-
2 * Copyright (c) 2000, 2001 Michael Smith
3 * Copyright (c) 2000 BSDi
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * $FreeBSD: stable/9/sys/dev/mly/mly.c 281827 2015-04-21 11:29:07Z mav $
28 */
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/malloc.h>
33 #include <sys/kernel.h>
34 #include <sys/bus.h>
35 #include <sys/conf.h>
36 #include <sys/ctype.h>
37 #include <sys/ioccom.h>
38 #include <sys/stat.h>
39
40 #include <machine/bus.h>
41 #include <machine/resource.h>
42 #include <sys/rman.h>
43
44 #include <cam/cam.h>
45 #include <cam/cam_ccb.h>
46 #include <cam/cam_periph.h>
47 #include <cam/cam_sim.h>
48 #include <cam/cam_xpt_sim.h>
49 #include <cam/scsi/scsi_all.h>
50 #include <cam/scsi/scsi_message.h>
51
52 #include <dev/pci/pcireg.h>
53 #include <dev/pci/pcivar.h>
54
55 #include <dev/mly/mlyreg.h>
56 #include <dev/mly/mlyio.h>
57 #include <dev/mly/mlyvar.h>
58 #include <dev/mly/mly_tables.h>
59
60 static int mly_probe(device_t dev);
61 static int mly_attach(device_t dev);
62 static int mly_pci_attach(struct mly_softc *sc);
63 static int mly_detach(device_t dev);
64 static int mly_shutdown(device_t dev);
65 static void mly_intr(void *arg);
66
67 static int mly_sg_map(struct mly_softc *sc);
68 static void mly_sg_map_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error);
69 static int mly_mmbox_map(struct mly_softc *sc);
70 static void mly_mmbox_map_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error);
71 static void mly_free(struct mly_softc *sc);
72
73 static int mly_get_controllerinfo(struct mly_softc *sc);
74 static void mly_scan_devices(struct mly_softc *sc);
75 static void mly_rescan_btl(struct mly_softc *sc, int bus, int target);
76 static void mly_complete_rescan(struct mly_command *mc);
77 static int mly_get_eventstatus(struct mly_softc *sc);
78 static int mly_enable_mmbox(struct mly_softc *sc);
79 static int mly_flush(struct mly_softc *sc);
80 static int mly_ioctl(struct mly_softc *sc, struct mly_command_ioctl *ioctl, void **data,
81 size_t datasize, u_int8_t *status, void *sense_buffer, size_t *sense_length);
82 static void mly_check_event(struct mly_softc *sc);
83 static void mly_fetch_event(struct mly_softc *sc);
84 static void mly_complete_event(struct mly_command *mc);
85 static void mly_process_event(struct mly_softc *sc, struct mly_event *me);
86 static void mly_periodic(void *data);
87
88 static int mly_immediate_command(struct mly_command *mc);
89 static int mly_start(struct mly_command *mc);
90 static void mly_done(struct mly_softc *sc);
91 static void mly_complete(void *context, int pending);
92
93 static int mly_alloc_command(struct mly_softc *sc, struct mly_command **mcp);
94 static void mly_release_command(struct mly_command *mc);
95 static void mly_alloc_commands_map(void *arg, bus_dma_segment_t *segs, int nseg, int error);
96 static int mly_alloc_commands(struct mly_softc *sc);
97 static void mly_release_commands(struct mly_softc *sc);
98 static void mly_map_command(struct mly_command *mc);
99 static void mly_unmap_command(struct mly_command *mc);
100
101 static int mly_cam_attach(struct mly_softc *sc);
102 static void mly_cam_detach(struct mly_softc *sc);
103 static void mly_cam_rescan_btl(struct mly_softc *sc, int bus, int target);
104 static void mly_cam_action(struct cam_sim *sim, union ccb *ccb);
105 static int mly_cam_action_io(struct cam_sim *sim, struct ccb_scsiio *csio);
106 static void mly_cam_poll(struct cam_sim *sim);
107 static void mly_cam_complete(struct mly_command *mc);
108 static struct cam_periph *mly_find_periph(struct mly_softc *sc, int bus, int target);
109 static int mly_name_device(struct mly_softc *sc, int bus, int target);
110
111 static int mly_fwhandshake(struct mly_softc *sc);
112
113 static void mly_describe_controller(struct mly_softc *sc);
114 #ifdef MLY_DEBUG
115 static void mly_printstate(struct mly_softc *sc);
116 static void mly_print_command(struct mly_command *mc);
117 static void mly_print_packet(struct mly_command *mc);
118 static void mly_panic(struct mly_softc *sc, char *reason);
119 static int mly_timeout(struct mly_softc *sc);
120 #endif
121 void mly_print_controller(int controller);
122
123
124 static d_open_t mly_user_open;
125 static d_close_t mly_user_close;
126 static d_ioctl_t mly_user_ioctl;
127 static int mly_user_command(struct mly_softc *sc, struct mly_user_command *uc);
128 static int mly_user_health(struct mly_softc *sc, struct mly_user_health *uh);
129
130 #define MLY_CMD_TIMEOUT 20
131
132 static device_method_t mly_methods[] = {
133 /* Device interface */
134 DEVMETHOD(device_probe, mly_probe),
135 DEVMETHOD(device_attach, mly_attach),
136 DEVMETHOD(device_detach, mly_detach),
137 DEVMETHOD(device_shutdown, mly_shutdown),
138 { 0, 0 }
139 };
140
141 static driver_t mly_pci_driver = {
142 "mly",
143 mly_methods,
144 sizeof(struct mly_softc)
145 };
146
147 static devclass_t mly_devclass;
148 DRIVER_MODULE(mly, pci, mly_pci_driver, mly_devclass, 0, 0);
149 MODULE_DEPEND(mly, pci, 1, 1, 1);
150 MODULE_DEPEND(mly, cam, 1, 1, 1);
151
152 static struct cdevsw mly_cdevsw = {
153 .d_version = D_VERSION,
154 .d_flags = D_NEEDGIANT,
155 .d_open = mly_user_open,
156 .d_close = mly_user_close,
157 .d_ioctl = mly_user_ioctl,
158 .d_name = "mly",
159 };
160
161 /********************************************************************************
162 ********************************************************************************
163 Device Interface
164 ********************************************************************************
165 ********************************************************************************/
166
167 static struct mly_ident
168 {
169 u_int16_t vendor;
170 u_int16_t device;
171 u_int16_t subvendor;
172 u_int16_t subdevice;
173 int hwif;
174 char *desc;
175 } mly_identifiers[] = {
176 {0x1069, 0xba56, 0x1069, 0x0040, MLY_HWIF_STRONGARM, "Mylex eXtremeRAID 2000"},
177 {0x1069, 0xba56, 0x1069, 0x0030, MLY_HWIF_STRONGARM, "Mylex eXtremeRAID 3000"},
178 {0x1069, 0x0050, 0x1069, 0x0050, MLY_HWIF_I960RX, "Mylex AcceleRAID 352"},
179 {0x1069, 0x0050, 0x1069, 0x0052, MLY_HWIF_I960RX, "Mylex AcceleRAID 170"},
180 {0x1069, 0x0050, 0x1069, 0x0054, MLY_HWIF_I960RX, "Mylex AcceleRAID 160"},
181 {0, 0, 0, 0, 0, 0}
182 };
183
184 /********************************************************************************
185 * Compare the provided PCI device with the list we support.
186 */
187 static int
mly_probe(device_t dev)188 mly_probe(device_t dev)
189 {
190 struct mly_ident *m;
191
192 debug_called(1);
193
194 for (m = mly_identifiers; m->vendor != 0; m++) {
195 if ((m->vendor == pci_get_vendor(dev)) &&
196 (m->device == pci_get_device(dev)) &&
197 ((m->subvendor == 0) || ((m->subvendor == pci_get_subvendor(dev)) &&
198 (m->subdevice == pci_get_subdevice(dev))))) {
199
200 device_set_desc(dev, m->desc);
201 return(BUS_PROBE_DEFAULT); /* allow room to be overridden */
202 }
203 }
204 return(ENXIO);
205 }
206
207 /********************************************************************************
208 * Initialise the controller and softc
209 */
210 static int
mly_attach(device_t dev)211 mly_attach(device_t dev)
212 {
213 struct mly_softc *sc = device_get_softc(dev);
214 int error;
215
216 debug_called(1);
217
218 sc->mly_dev = dev;
219
220 #ifdef MLY_DEBUG
221 if (device_get_unit(sc->mly_dev) == 0)
222 mly_softc0 = sc;
223 #endif
224
225 /*
226 * Do PCI-specific initialisation.
227 */
228 if ((error = mly_pci_attach(sc)) != 0)
229 goto out;
230
231 /*
232 * Initialise per-controller queues.
233 */
234 mly_initq_free(sc);
235 mly_initq_busy(sc);
236 mly_initq_complete(sc);
237
238 /*
239 * Initialise command-completion task.
240 */
241 TASK_INIT(&sc->mly_task_complete, 0, mly_complete, sc);
242
243 /* disable interrupts before we start talking to the controller */
244 MLY_MASK_INTERRUPTS(sc);
245
246 /*
247 * Wait for the controller to come ready, handshake with the firmware if required.
248 * This is typically only necessary on platforms where the controller BIOS does not
249 * run.
250 */
251 if ((error = mly_fwhandshake(sc)))
252 goto out;
253
254 /*
255 * Allocate initial command buffers.
256 */
257 if ((error = mly_alloc_commands(sc)))
258 goto out;
259
260 /*
261 * Obtain controller feature information
262 */
263 if ((error = mly_get_controllerinfo(sc)))
264 goto out;
265
266 /*
267 * Reallocate command buffers now we know how many we want.
268 */
269 mly_release_commands(sc);
270 if ((error = mly_alloc_commands(sc)))
271 goto out;
272
273 /*
274 * Get the current event counter for health purposes, populate the initial
275 * health status buffer.
276 */
277 if ((error = mly_get_eventstatus(sc)))
278 goto out;
279
280 /*
281 * Enable memory-mailbox mode.
282 */
283 if ((error = mly_enable_mmbox(sc)))
284 goto out;
285
286 /*
287 * Attach to CAM.
288 */
289 if ((error = mly_cam_attach(sc)))
290 goto out;
291
292 /*
293 * Print a little information about the controller
294 */
295 mly_describe_controller(sc);
296
297 /*
298 * Mark all attached devices for rescan.
299 */
300 mly_scan_devices(sc);
301
302 /*
303 * Instigate the first status poll immediately. Rescan completions won't
304 * happen until interrupts are enabled, which should still be before
305 * the SCSI subsystem gets to us, courtesy of the "SCSI settling delay".
306 */
307 mly_periodic((void *)sc);
308
309 /*
310 * Create the control device.
311 */
312 sc->mly_dev_t = make_dev(&mly_cdevsw, 0, UID_ROOT, GID_OPERATOR,
313 S_IRUSR | S_IWUSR, "mly%d", device_get_unit(sc->mly_dev));
314 sc->mly_dev_t->si_drv1 = sc;
315
316 /* enable interrupts now */
317 MLY_UNMASK_INTERRUPTS(sc);
318
319 #ifdef MLY_DEBUG
320 timeout((timeout_t *)mly_timeout, sc, MLY_CMD_TIMEOUT * hz);
321 #endif
322
323 out:
324 if (error != 0)
325 mly_free(sc);
326 return(error);
327 }
328
329 /********************************************************************************
330 * Perform PCI-specific initialisation.
331 */
332 static int
mly_pci_attach(struct mly_softc * sc)333 mly_pci_attach(struct mly_softc *sc)
334 {
335 int i, error;
336
337 debug_called(1);
338
339 /* assume failure is 'not configured' */
340 error = ENXIO;
341
342 /*
343 * Verify that the adapter is correctly set up in PCI space.
344 */
345 pci_enable_busmaster(sc->mly_dev);
346
347 /*
348 * Allocate the PCI register window.
349 */
350 sc->mly_regs_rid = PCIR_BAR(0); /* first base address register */
351 if ((sc->mly_regs_resource = bus_alloc_resource_any(sc->mly_dev,
352 SYS_RES_MEMORY, &sc->mly_regs_rid, RF_ACTIVE)) == NULL) {
353 mly_printf(sc, "can't allocate register window\n");
354 goto fail;
355 }
356 sc->mly_btag = rman_get_bustag(sc->mly_regs_resource);
357 sc->mly_bhandle = rman_get_bushandle(sc->mly_regs_resource);
358
359 /*
360 * Allocate and connect our interrupt.
361 */
362 sc->mly_irq_rid = 0;
363 if ((sc->mly_irq = bus_alloc_resource_any(sc->mly_dev, SYS_RES_IRQ,
364 &sc->mly_irq_rid, RF_SHAREABLE | RF_ACTIVE)) == NULL) {
365 mly_printf(sc, "can't allocate interrupt\n");
366 goto fail;
367 }
368 if (bus_setup_intr(sc->mly_dev, sc->mly_irq, INTR_TYPE_CAM | INTR_ENTROPY, NULL, mly_intr, sc, &sc->mly_intr)) {
369 mly_printf(sc, "can't set up interrupt\n");
370 goto fail;
371 }
372
373 /* assume failure is 'out of memory' */
374 error = ENOMEM;
375
376 /*
377 * Allocate the parent bus DMA tag appropriate for our PCI interface.
378 *
379 * Note that all of these controllers are 64-bit capable.
380 */
381 if (bus_dma_tag_create(bus_get_dma_tag(sc->mly_dev),/* PCI parent */
382 1, 0, /* alignment, boundary */
383 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
384 BUS_SPACE_MAXADDR, /* highaddr */
385 NULL, NULL, /* filter, filterarg */
386 BUS_SPACE_MAXSIZE_32BIT, /* maxsize */
387 BUS_SPACE_UNRESTRICTED, /* nsegments */
388 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
389 BUS_DMA_ALLOCNOW, /* flags */
390 NULL, /* lockfunc */
391 NULL, /* lockarg */
392 &sc->mly_parent_dmat)) {
393 mly_printf(sc, "can't allocate parent DMA tag\n");
394 goto fail;
395 }
396
397 /*
398 * Create DMA tag for mapping buffers into controller-addressable space.
399 */
400 if (bus_dma_tag_create(sc->mly_parent_dmat, /* parent */
401 1, 0, /* alignment, boundary */
402 BUS_SPACE_MAXADDR, /* lowaddr */
403 BUS_SPACE_MAXADDR, /* highaddr */
404 NULL, NULL, /* filter, filterarg */
405 DFLTPHYS, /* maxsize */
406 MLY_MAX_SGENTRIES, /* nsegments */
407 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
408 0, /* flags */
409 busdma_lock_mutex, /* lockfunc */
410 &Giant, /* lockarg */
411 &sc->mly_buffer_dmat)) {
412 mly_printf(sc, "can't allocate buffer DMA tag\n");
413 goto fail;
414 }
415
416 /*
417 * Initialise the DMA tag for command packets.
418 */
419 if (bus_dma_tag_create(sc->mly_parent_dmat, /* parent */
420 1, 0, /* alignment, boundary */
421 BUS_SPACE_MAXADDR, /* lowaddr */
422 BUS_SPACE_MAXADDR, /* highaddr */
423 NULL, NULL, /* filter, filterarg */
424 sizeof(union mly_command_packet) * MLY_MAX_COMMANDS, 1, /* maxsize, nsegments */
425 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
426 BUS_DMA_ALLOCNOW, /* flags */
427 NULL, NULL, /* lockfunc, lockarg */
428 &sc->mly_packet_dmat)) {
429 mly_printf(sc, "can't allocate command packet DMA tag\n");
430 goto fail;
431 }
432
433 /*
434 * Detect the hardware interface version
435 */
436 for (i = 0; mly_identifiers[i].vendor != 0; i++) {
437 if ((mly_identifiers[i].vendor == pci_get_vendor(sc->mly_dev)) &&
438 (mly_identifiers[i].device == pci_get_device(sc->mly_dev))) {
439 sc->mly_hwif = mly_identifiers[i].hwif;
440 switch(sc->mly_hwif) {
441 case MLY_HWIF_I960RX:
442 debug(1, "set hardware up for i960RX");
443 sc->mly_doorbell_true = 0x00;
444 sc->mly_command_mailbox = MLY_I960RX_COMMAND_MAILBOX;
445 sc->mly_status_mailbox = MLY_I960RX_STATUS_MAILBOX;
446 sc->mly_idbr = MLY_I960RX_IDBR;
447 sc->mly_odbr = MLY_I960RX_ODBR;
448 sc->mly_error_status = MLY_I960RX_ERROR_STATUS;
449 sc->mly_interrupt_status = MLY_I960RX_INTERRUPT_STATUS;
450 sc->mly_interrupt_mask = MLY_I960RX_INTERRUPT_MASK;
451 break;
452 case MLY_HWIF_STRONGARM:
453 debug(1, "set hardware up for StrongARM");
454 sc->mly_doorbell_true = 0xff; /* doorbell 'true' is 0 */
455 sc->mly_command_mailbox = MLY_STRONGARM_COMMAND_MAILBOX;
456 sc->mly_status_mailbox = MLY_STRONGARM_STATUS_MAILBOX;
457 sc->mly_idbr = MLY_STRONGARM_IDBR;
458 sc->mly_odbr = MLY_STRONGARM_ODBR;
459 sc->mly_error_status = MLY_STRONGARM_ERROR_STATUS;
460 sc->mly_interrupt_status = MLY_STRONGARM_INTERRUPT_STATUS;
461 sc->mly_interrupt_mask = MLY_STRONGARM_INTERRUPT_MASK;
462 break;
463 }
464 break;
465 }
466 }
467
468 /*
469 * Create the scatter/gather mappings.
470 */
471 if ((error = mly_sg_map(sc)))
472 goto fail;
473
474 /*
475 * Allocate and map the memory mailbox
476 */
477 if ((error = mly_mmbox_map(sc)))
478 goto fail;
479
480 error = 0;
481
482 fail:
483 return(error);
484 }
485
486 /********************************************************************************
487 * Shut the controller down and detach all our resources.
488 */
489 static int
mly_detach(device_t dev)490 mly_detach(device_t dev)
491 {
492 int error;
493
494 if ((error = mly_shutdown(dev)) != 0)
495 return(error);
496
497 mly_free(device_get_softc(dev));
498 return(0);
499 }
500
501 /********************************************************************************
502 * Bring the controller to a state where it can be safely left alone.
503 *
504 * Note that it should not be necessary to wait for any outstanding commands,
505 * as they should be completed prior to calling here.
506 *
507 * XXX this applies for I/O, but not status polls; we should beware of
508 * the case where a status command is running while we detach.
509 */
510 static int
mly_shutdown(device_t dev)511 mly_shutdown(device_t dev)
512 {
513 struct mly_softc *sc = device_get_softc(dev);
514
515 debug_called(1);
516
517 if (sc->mly_state & MLY_STATE_OPEN)
518 return(EBUSY);
519
520 /* kill the periodic event */
521 untimeout(mly_periodic, sc, sc->mly_periodic);
522
523 /* flush controller */
524 mly_printf(sc, "flushing cache...");
525 printf("%s\n", mly_flush(sc) ? "failed" : "done");
526
527 MLY_MASK_INTERRUPTS(sc);
528
529 return(0);
530 }
531
532 /*******************************************************************************
533 * Take an interrupt, or be poked by other code to look for interrupt-worthy
534 * status.
535 */
536 static void
mly_intr(void * arg)537 mly_intr(void *arg)
538 {
539 struct mly_softc *sc = (struct mly_softc *)arg;
540
541 debug_called(2);
542
543 mly_done(sc);
544 };
545
546 /********************************************************************************
547 ********************************************************************************
548 Bus-dependant Resource Management
549 ********************************************************************************
550 ********************************************************************************/
551
552 /********************************************************************************
553 * Allocate memory for the scatter/gather tables
554 */
555 static int
mly_sg_map(struct mly_softc * sc)556 mly_sg_map(struct mly_softc *sc)
557 {
558 size_t segsize;
559
560 debug_called(1);
561
562 /*
563 * Create a single tag describing a region large enough to hold all of
564 * the s/g lists we will need.
565 */
566 segsize = sizeof(struct mly_sg_entry) * MLY_MAX_COMMANDS *MLY_MAX_SGENTRIES;
567 if (bus_dma_tag_create(sc->mly_parent_dmat, /* parent */
568 1, 0, /* alignment,boundary */
569 BUS_SPACE_MAXADDR, /* lowaddr */
570 BUS_SPACE_MAXADDR, /* highaddr */
571 NULL, NULL, /* filter, filterarg */
572 segsize, 1, /* maxsize, nsegments */
573 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
574 BUS_DMA_ALLOCNOW, /* flags */
575 NULL, NULL, /* lockfunc, lockarg */
576 &sc->mly_sg_dmat)) {
577 mly_printf(sc, "can't allocate scatter/gather DMA tag\n");
578 return(ENOMEM);
579 }
580
581 /*
582 * Allocate enough s/g maps for all commands and permanently map them into
583 * controller-visible space.
584 *
585 * XXX this assumes we can get enough space for all the s/g maps in one
586 * contiguous slab.
587 */
588 if (bus_dmamem_alloc(sc->mly_sg_dmat, (void **)&sc->mly_sg_table,
589 BUS_DMA_NOWAIT, &sc->mly_sg_dmamap)) {
590 mly_printf(sc, "can't allocate s/g table\n");
591 return(ENOMEM);
592 }
593 if (bus_dmamap_load(sc->mly_sg_dmat, sc->mly_sg_dmamap, sc->mly_sg_table,
594 segsize, mly_sg_map_helper, sc, BUS_DMA_NOWAIT) != 0)
595 return (ENOMEM);
596 return(0);
597 }
598
599 /********************************************************************************
600 * Save the physical address of the base of the s/g table.
601 */
602 static void
mly_sg_map_helper(void * arg,bus_dma_segment_t * segs,int nseg,int error)603 mly_sg_map_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error)
604 {
605 struct mly_softc *sc = (struct mly_softc *)arg;
606
607 debug_called(1);
608
609 /* save base of s/g table's address in bus space */
610 sc->mly_sg_busaddr = segs->ds_addr;
611 }
612
613 /********************************************************************************
614 * Allocate memory for the memory-mailbox interface
615 */
616 static int
mly_mmbox_map(struct mly_softc * sc)617 mly_mmbox_map(struct mly_softc *sc)
618 {
619
620 /*
621 * Create a DMA tag for a single contiguous region large enough for the
622 * memory mailbox structure.
623 */
624 if (bus_dma_tag_create(sc->mly_parent_dmat, /* parent */
625 1, 0, /* alignment,boundary */
626 BUS_SPACE_MAXADDR, /* lowaddr */
627 BUS_SPACE_MAXADDR, /* highaddr */
628 NULL, NULL, /* filter, filterarg */
629 sizeof(struct mly_mmbox), 1, /* maxsize, nsegments */
630 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
631 BUS_DMA_ALLOCNOW, /* flags */
632 NULL, NULL, /* lockfunc, lockarg */
633 &sc->mly_mmbox_dmat)) {
634 mly_printf(sc, "can't allocate memory mailbox DMA tag\n");
635 return(ENOMEM);
636 }
637
638 /*
639 * Allocate the buffer
640 */
641 if (bus_dmamem_alloc(sc->mly_mmbox_dmat, (void **)&sc->mly_mmbox, BUS_DMA_NOWAIT, &sc->mly_mmbox_dmamap)) {
642 mly_printf(sc, "can't allocate memory mailbox\n");
643 return(ENOMEM);
644 }
645 if (bus_dmamap_load(sc->mly_mmbox_dmat, sc->mly_mmbox_dmamap, sc->mly_mmbox,
646 sizeof(struct mly_mmbox), mly_mmbox_map_helper, sc,
647 BUS_DMA_NOWAIT) != 0)
648 return (ENOMEM);
649 bzero(sc->mly_mmbox, sizeof(*sc->mly_mmbox));
650 return(0);
651
652 }
653
654 /********************************************************************************
655 * Save the physical address of the memory mailbox
656 */
657 static void
mly_mmbox_map_helper(void * arg,bus_dma_segment_t * segs,int nseg,int error)658 mly_mmbox_map_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error)
659 {
660 struct mly_softc *sc = (struct mly_softc *)arg;
661
662 debug_called(1);
663
664 sc->mly_mmbox_busaddr = segs->ds_addr;
665 }
666
667 /********************************************************************************
668 * Free all of the resources associated with (sc)
669 *
670 * Should not be called if the controller is active.
671 */
672 static void
mly_free(struct mly_softc * sc)673 mly_free(struct mly_softc *sc)
674 {
675
676 debug_called(1);
677
678 /* Remove the management device */
679 destroy_dev(sc->mly_dev_t);
680
681 /* detach from CAM */
682 mly_cam_detach(sc);
683
684 /* release command memory */
685 mly_release_commands(sc);
686
687 /* throw away the controllerinfo structure */
688 if (sc->mly_controllerinfo != NULL)
689 free(sc->mly_controllerinfo, M_DEVBUF);
690
691 /* throw away the controllerparam structure */
692 if (sc->mly_controllerparam != NULL)
693 free(sc->mly_controllerparam, M_DEVBUF);
694
695 /* destroy data-transfer DMA tag */
696 if (sc->mly_buffer_dmat)
697 bus_dma_tag_destroy(sc->mly_buffer_dmat);
698
699 /* free and destroy DMA memory and tag for s/g lists */
700 if (sc->mly_sg_table) {
701 bus_dmamap_unload(sc->mly_sg_dmat, sc->mly_sg_dmamap);
702 bus_dmamem_free(sc->mly_sg_dmat, sc->mly_sg_table, sc->mly_sg_dmamap);
703 }
704 if (sc->mly_sg_dmat)
705 bus_dma_tag_destroy(sc->mly_sg_dmat);
706
707 /* free and destroy DMA memory and tag for memory mailbox */
708 if (sc->mly_mmbox) {
709 bus_dmamap_unload(sc->mly_mmbox_dmat, sc->mly_mmbox_dmamap);
710 bus_dmamem_free(sc->mly_mmbox_dmat, sc->mly_mmbox, sc->mly_mmbox_dmamap);
711 }
712 if (sc->mly_mmbox_dmat)
713 bus_dma_tag_destroy(sc->mly_mmbox_dmat);
714
715 /* disconnect the interrupt handler */
716 if (sc->mly_intr)
717 bus_teardown_intr(sc->mly_dev, sc->mly_irq, sc->mly_intr);
718 if (sc->mly_irq != NULL)
719 bus_release_resource(sc->mly_dev, SYS_RES_IRQ, sc->mly_irq_rid, sc->mly_irq);
720
721 /* destroy the parent DMA tag */
722 if (sc->mly_parent_dmat)
723 bus_dma_tag_destroy(sc->mly_parent_dmat);
724
725 /* release the register window mapping */
726 if (sc->mly_regs_resource != NULL)
727 bus_release_resource(sc->mly_dev, SYS_RES_MEMORY, sc->mly_regs_rid, sc->mly_regs_resource);
728 }
729
730 /********************************************************************************
731 ********************************************************************************
732 Command Wrappers
733 ********************************************************************************
734 ********************************************************************************/
735
736 /********************************************************************************
737 * Fill in the mly_controllerinfo and mly_controllerparam fields in the softc.
738 */
739 static int
mly_get_controllerinfo(struct mly_softc * sc)740 mly_get_controllerinfo(struct mly_softc *sc)
741 {
742 struct mly_command_ioctl mci;
743 u_int8_t status;
744 int error;
745
746 debug_called(1);
747
748 if (sc->mly_controllerinfo != NULL)
749 free(sc->mly_controllerinfo, M_DEVBUF);
750
751 /* build the getcontrollerinfo ioctl and send it */
752 bzero(&mci, sizeof(mci));
753 sc->mly_controllerinfo = NULL;
754 mci.sub_ioctl = MDACIOCTL_GETCONTROLLERINFO;
755 if ((error = mly_ioctl(sc, &mci, (void **)&sc->mly_controllerinfo, sizeof(*sc->mly_controllerinfo),
756 &status, NULL, NULL)))
757 return(error);
758 if (status != 0)
759 return(EIO);
760
761 if (sc->mly_controllerparam != NULL)
762 free(sc->mly_controllerparam, M_DEVBUF);
763
764 /* build the getcontrollerparameter ioctl and send it */
765 bzero(&mci, sizeof(mci));
766 sc->mly_controllerparam = NULL;
767 mci.sub_ioctl = MDACIOCTL_GETCONTROLLERPARAMETER;
768 if ((error = mly_ioctl(sc, &mci, (void **)&sc->mly_controllerparam, sizeof(*sc->mly_controllerparam),
769 &status, NULL, NULL)))
770 return(error);
771 if (status != 0)
772 return(EIO);
773
774 return(0);
775 }
776
777 /********************************************************************************
778 * Schedule all possible devices for a rescan.
779 *
780 */
781 static void
mly_scan_devices(struct mly_softc * sc)782 mly_scan_devices(struct mly_softc *sc)
783 {
784 int bus, target;
785
786 debug_called(1);
787
788 /*
789 * Clear any previous BTL information.
790 */
791 bzero(&sc->mly_btl, sizeof(sc->mly_btl));
792
793 /*
794 * Mark all devices as requiring a rescan, and let the next
795 * periodic scan collect them.
796 */
797 for (bus = 0; bus < sc->mly_cam_channels; bus++)
798 if (MLY_BUS_IS_VALID(sc, bus))
799 for (target = 0; target < MLY_MAX_TARGETS; target++)
800 sc->mly_btl[bus][target].mb_flags = MLY_BTL_RESCAN;
801
802 }
803
804 /********************************************************************************
805 * Rescan a device, possibly as a consequence of getting an event which suggests
806 * that it may have changed.
807 *
808 * If we suffer resource starvation, we can abandon the rescan as we'll be
809 * retried.
810 */
811 static void
mly_rescan_btl(struct mly_softc * sc,int bus,int target)812 mly_rescan_btl(struct mly_softc *sc, int bus, int target)
813 {
814 struct mly_command *mc;
815 struct mly_command_ioctl *mci;
816
817 debug_called(1);
818
819 /* check that this bus is valid */
820 if (!MLY_BUS_IS_VALID(sc, bus))
821 return;
822
823 /* get a command */
824 if (mly_alloc_command(sc, &mc))
825 return;
826
827 /* set up the data buffer */
828 if ((mc->mc_data = malloc(sizeof(union mly_devinfo), M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL) {
829 mly_release_command(mc);
830 return;
831 }
832 mc->mc_flags |= MLY_CMD_DATAIN;
833 mc->mc_complete = mly_complete_rescan;
834
835 /*
836 * Build the ioctl.
837 */
838 mci = (struct mly_command_ioctl *)&mc->mc_packet->ioctl;
839 mci->opcode = MDACMD_IOCTL;
840 mci->addr.phys.controller = 0;
841 mci->timeout.value = 30;
842 mci->timeout.scale = MLY_TIMEOUT_SECONDS;
843 if (MLY_BUS_IS_VIRTUAL(sc, bus)) {
844 mc->mc_length = mci->data_size = sizeof(struct mly_ioctl_getlogdevinfovalid);
845 mci->sub_ioctl = MDACIOCTL_GETLOGDEVINFOVALID;
846 mci->addr.log.logdev = MLY_LOGDEV_ID(sc, bus, target);
847 debug(1, "logical device %d", mci->addr.log.logdev);
848 } else {
849 mc->mc_length = mci->data_size = sizeof(struct mly_ioctl_getphysdevinfovalid);
850 mci->sub_ioctl = MDACIOCTL_GETPHYSDEVINFOVALID;
851 mci->addr.phys.lun = 0;
852 mci->addr.phys.target = target;
853 mci->addr.phys.channel = bus;
854 debug(1, "physical device %d:%d", mci->addr.phys.channel, mci->addr.phys.target);
855 }
856
857 /*
858 * Dispatch the command. If we successfully send the command, clear the rescan
859 * bit.
860 */
861 if (mly_start(mc) != 0) {
862 mly_release_command(mc);
863 } else {
864 sc->mly_btl[bus][target].mb_flags &= ~MLY_BTL_RESCAN; /* success */
865 }
866 }
867
868 /********************************************************************************
869 * Handle the completion of a rescan operation
870 */
871 static void
mly_complete_rescan(struct mly_command * mc)872 mly_complete_rescan(struct mly_command *mc)
873 {
874 struct mly_softc *sc = mc->mc_sc;
875 struct mly_ioctl_getlogdevinfovalid *ldi;
876 struct mly_ioctl_getphysdevinfovalid *pdi;
877 struct mly_command_ioctl *mci;
878 struct mly_btl btl, *btlp;
879 int bus, target, rescan;
880
881 debug_called(1);
882
883 /*
884 * Recover the bus and target from the command. We need these even in
885 * the case where we don't have a useful response.
886 */
887 mci = (struct mly_command_ioctl *)&mc->mc_packet->ioctl;
888 if (mci->sub_ioctl == MDACIOCTL_GETLOGDEVINFOVALID) {
889 bus = MLY_LOGDEV_BUS(sc, mci->addr.log.logdev);
890 target = MLY_LOGDEV_TARGET(sc, mci->addr.log.logdev);
891 } else {
892 bus = mci->addr.phys.channel;
893 target = mci->addr.phys.target;
894 }
895 /* XXX validate bus/target? */
896
897 /* the default result is 'no device' */
898 bzero(&btl, sizeof(btl));
899
900 /* if the rescan completed OK, we have possibly-new BTL data */
901 if (mc->mc_status == 0) {
902 if (mc->mc_length == sizeof(*ldi)) {
903 ldi = (struct mly_ioctl_getlogdevinfovalid *)mc->mc_data;
904 if ((MLY_LOGDEV_BUS(sc, ldi->logical_device_number) != bus) ||
905 (MLY_LOGDEV_TARGET(sc, ldi->logical_device_number) != target)) {
906 mly_printf(sc, "WARNING: BTL rescan for %d:%d returned data for %d:%d instead\n",
907 bus, target, MLY_LOGDEV_BUS(sc, ldi->logical_device_number),
908 MLY_LOGDEV_TARGET(sc, ldi->logical_device_number));
909 /* XXX what can we do about this? */
910 }
911 btl.mb_flags = MLY_BTL_LOGICAL;
912 btl.mb_type = ldi->raid_level;
913 btl.mb_state = ldi->state;
914 debug(1, "BTL rescan for %d returns %s, %s", ldi->logical_device_number,
915 mly_describe_code(mly_table_device_type, ldi->raid_level),
916 mly_describe_code(mly_table_device_state, ldi->state));
917 } else if (mc->mc_length == sizeof(*pdi)) {
918 pdi = (struct mly_ioctl_getphysdevinfovalid *)mc->mc_data;
919 if ((pdi->channel != bus) || (pdi->target != target)) {
920 mly_printf(sc, "WARNING: BTL rescan for %d:%d returned data for %d:%d instead\n",
921 bus, target, pdi->channel, pdi->target);
922 /* XXX what can we do about this? */
923 }
924 btl.mb_flags = MLY_BTL_PHYSICAL;
925 btl.mb_type = MLY_DEVICE_TYPE_PHYSICAL;
926 btl.mb_state = pdi->state;
927 btl.mb_speed = pdi->speed;
928 btl.mb_width = pdi->width;
929 if (pdi->state != MLY_DEVICE_STATE_UNCONFIGURED)
930 sc->mly_btl[bus][target].mb_flags |= MLY_BTL_PROTECTED;
931 debug(1, "BTL rescan for %d:%d returns %s", bus, target,
932 mly_describe_code(mly_table_device_state, pdi->state));
933 } else {
934 mly_printf(sc, "BTL rescan result invalid\n");
935 }
936 }
937
938 free(mc->mc_data, M_DEVBUF);
939 mly_release_command(mc);
940
941 /*
942 * Decide whether we need to rescan the device.
943 */
944 rescan = 0;
945
946 /* device type changes (usually between 'nothing' and 'something') */
947 btlp = &sc->mly_btl[bus][target];
948 if (btl.mb_flags != btlp->mb_flags) {
949 debug(1, "flags changed, rescanning");
950 rescan = 1;
951 }
952
953 /* XXX other reasons? */
954
955 /*
956 * Update BTL information.
957 */
958 *btlp = btl;
959
960 /*
961 * Perform CAM rescan if required.
962 */
963 if (rescan)
964 mly_cam_rescan_btl(sc, bus, target);
965 }
966
967 /********************************************************************************
968 * Get the current health status and set the 'next event' counter to suit.
969 */
970 static int
mly_get_eventstatus(struct mly_softc * sc)971 mly_get_eventstatus(struct mly_softc *sc)
972 {
973 struct mly_command_ioctl mci;
974 struct mly_health_status *mh;
975 u_int8_t status;
976 int error;
977
978 /* build the gethealthstatus ioctl and send it */
979 bzero(&mci, sizeof(mci));
980 mh = NULL;
981 mci.sub_ioctl = MDACIOCTL_GETHEALTHSTATUS;
982
983 if ((error = mly_ioctl(sc, &mci, (void **)&mh, sizeof(*mh), &status, NULL, NULL)))
984 return(error);
985 if (status != 0)
986 return(EIO);
987
988 /* get the event counter */
989 sc->mly_event_change = mh->change_counter;
990 sc->mly_event_waiting = mh->next_event;
991 sc->mly_event_counter = mh->next_event;
992
993 /* save the health status into the memory mailbox */
994 bcopy(mh, &sc->mly_mmbox->mmm_health.status, sizeof(*mh));
995
996 debug(1, "initial change counter %d, event counter %d", mh->change_counter, mh->next_event);
997
998 free(mh, M_DEVBUF);
999 return(0);
1000 }
1001
1002 /********************************************************************************
1003 * Enable the memory mailbox mode.
1004 */
1005 static int
mly_enable_mmbox(struct mly_softc * sc)1006 mly_enable_mmbox(struct mly_softc *sc)
1007 {
1008 struct mly_command_ioctl mci;
1009 u_int8_t *sp, status;
1010 int error;
1011
1012 debug_called(1);
1013
1014 /* build the ioctl and send it */
1015 bzero(&mci, sizeof(mci));
1016 mci.sub_ioctl = MDACIOCTL_SETMEMORYMAILBOX;
1017 /* set buffer addresses */
1018 mci.param.setmemorymailbox.command_mailbox_physaddr =
1019 sc->mly_mmbox_busaddr + offsetof(struct mly_mmbox, mmm_command);
1020 mci.param.setmemorymailbox.status_mailbox_physaddr =
1021 sc->mly_mmbox_busaddr + offsetof(struct mly_mmbox, mmm_status);
1022 mci.param.setmemorymailbox.health_buffer_physaddr =
1023 sc->mly_mmbox_busaddr + offsetof(struct mly_mmbox, mmm_health);
1024
1025 /* set buffer sizes - abuse of data_size field is revolting */
1026 sp = (u_int8_t *)&mci.data_size;
1027 sp[0] = ((sizeof(union mly_command_packet) * MLY_MMBOX_COMMANDS) / 1024);
1028 sp[1] = (sizeof(union mly_status_packet) * MLY_MMBOX_STATUS) / 1024;
1029 mci.param.setmemorymailbox.health_buffer_size = sizeof(union mly_health_region) / 1024;
1030
1031 debug(1, "memory mailbox at %p (0x%llx/%d 0x%llx/%d 0x%llx/%d", sc->mly_mmbox,
1032 mci.param.setmemorymailbox.command_mailbox_physaddr, sp[0],
1033 mci.param.setmemorymailbox.status_mailbox_physaddr, sp[1],
1034 mci.param.setmemorymailbox.health_buffer_physaddr,
1035 mci.param.setmemorymailbox.health_buffer_size);
1036
1037 if ((error = mly_ioctl(sc, &mci, NULL, 0, &status, NULL, NULL)))
1038 return(error);
1039 if (status != 0)
1040 return(EIO);
1041 sc->mly_state |= MLY_STATE_MMBOX_ACTIVE;
1042 debug(1, "memory mailbox active");
1043 return(0);
1044 }
1045
1046 /********************************************************************************
1047 * Flush all pending I/O from the controller.
1048 */
1049 static int
mly_flush(struct mly_softc * sc)1050 mly_flush(struct mly_softc *sc)
1051 {
1052 struct mly_command_ioctl mci;
1053 u_int8_t status;
1054 int error;
1055
1056 debug_called(1);
1057
1058 /* build the ioctl */
1059 bzero(&mci, sizeof(mci));
1060 mci.sub_ioctl = MDACIOCTL_FLUSHDEVICEDATA;
1061 mci.param.deviceoperation.operation_device = MLY_OPDEVICE_PHYSICAL_CONTROLLER;
1062
1063 /* pass it off to the controller */
1064 if ((error = mly_ioctl(sc, &mci, NULL, 0, &status, NULL, NULL)))
1065 return(error);
1066
1067 return((status == 0) ? 0 : EIO);
1068 }
1069
1070 /********************************************************************************
1071 * Perform an ioctl command.
1072 *
1073 * If (data) is not NULL, the command requires data transfer. If (*data) is NULL
1074 * the command requires data transfer from the controller, and we will allocate
1075 * a buffer for it. If (*data) is not NULL, the command requires data transfer
1076 * to the controller.
1077 *
1078 * XXX passing in the whole ioctl structure is ugly. Better ideas?
1079 *
1080 * XXX we don't even try to handle the case where datasize > 4k. We should.
1081 */
1082 static int
mly_ioctl(struct mly_softc * sc,struct mly_command_ioctl * ioctl,void ** data,size_t datasize,u_int8_t * status,void * sense_buffer,size_t * sense_length)1083 mly_ioctl(struct mly_softc *sc, struct mly_command_ioctl *ioctl, void **data, size_t datasize,
1084 u_int8_t *status, void *sense_buffer, size_t *sense_length)
1085 {
1086 struct mly_command *mc;
1087 struct mly_command_ioctl *mci;
1088 int error;
1089
1090 debug_called(1);
1091
1092 mc = NULL;
1093 if (mly_alloc_command(sc, &mc)) {
1094 error = ENOMEM;
1095 goto out;
1096 }
1097
1098 /* copy the ioctl structure, but save some important fields and then fixup */
1099 mci = &mc->mc_packet->ioctl;
1100 ioctl->sense_buffer_address = mci->sense_buffer_address;
1101 ioctl->maximum_sense_size = mci->maximum_sense_size;
1102 *mci = *ioctl;
1103 mci->opcode = MDACMD_IOCTL;
1104 mci->timeout.value = 30;
1105 mci->timeout.scale = MLY_TIMEOUT_SECONDS;
1106
1107 /* handle the data buffer */
1108 if (data != NULL) {
1109 if (*data == NULL) {
1110 /* allocate data buffer */
1111 if ((mc->mc_data = malloc(datasize, M_DEVBUF, M_NOWAIT)) == NULL) {
1112 error = ENOMEM;
1113 goto out;
1114 }
1115 mc->mc_flags |= MLY_CMD_DATAIN;
1116 } else {
1117 mc->mc_data = *data;
1118 mc->mc_flags |= MLY_CMD_DATAOUT;
1119 }
1120 mc->mc_length = datasize;
1121 mc->mc_packet->generic.data_size = datasize;
1122 }
1123
1124 /* run the command */
1125 if ((error = mly_immediate_command(mc)))
1126 goto out;
1127
1128 /* clean up and return any data */
1129 *status = mc->mc_status;
1130 if ((mc->mc_sense > 0) && (sense_buffer != NULL)) {
1131 bcopy(mc->mc_packet, sense_buffer, mc->mc_sense);
1132 *sense_length = mc->mc_sense;
1133 goto out;
1134 }
1135
1136 /* should we return a data pointer? */
1137 if ((data != NULL) && (*data == NULL))
1138 *data = mc->mc_data;
1139
1140 /* command completed OK */
1141 error = 0;
1142
1143 out:
1144 if (mc != NULL) {
1145 /* do we need to free a data buffer we allocated? */
1146 if (error && (mc->mc_data != NULL) && (*data == NULL))
1147 free(mc->mc_data, M_DEVBUF);
1148 mly_release_command(mc);
1149 }
1150 return(error);
1151 }
1152
1153 /********************************************************************************
1154 * Check for event(s) outstanding in the controller.
1155 */
1156 static void
mly_check_event(struct mly_softc * sc)1157 mly_check_event(struct mly_softc *sc)
1158 {
1159
1160 /*
1161 * The controller may have updated the health status information,
1162 * so check for it here. Note that the counters are all in host memory,
1163 * so this check is very cheap. Also note that we depend on checking on
1164 * completion
1165 */
1166 if (sc->mly_mmbox->mmm_health.status.change_counter != sc->mly_event_change) {
1167 sc->mly_event_change = sc->mly_mmbox->mmm_health.status.change_counter;
1168 debug(1, "event change %d, event status update, %d -> %d", sc->mly_event_change,
1169 sc->mly_event_waiting, sc->mly_mmbox->mmm_health.status.next_event);
1170 sc->mly_event_waiting = sc->mly_mmbox->mmm_health.status.next_event;
1171
1172 /* wake up anyone that might be interested in this */
1173 wakeup(&sc->mly_event_change);
1174 }
1175 if (sc->mly_event_counter != sc->mly_event_waiting)
1176 mly_fetch_event(sc);
1177 }
1178
1179 /********************************************************************************
1180 * Fetch one event from the controller.
1181 *
1182 * If we fail due to resource starvation, we'll be retried the next time a
1183 * command completes.
1184 */
1185 static void
mly_fetch_event(struct mly_softc * sc)1186 mly_fetch_event(struct mly_softc *sc)
1187 {
1188 struct mly_command *mc;
1189 struct mly_command_ioctl *mci;
1190 int s;
1191 u_int32_t event;
1192
1193 debug_called(1);
1194
1195 /* get a command */
1196 if (mly_alloc_command(sc, &mc))
1197 return;
1198
1199 /* set up the data buffer */
1200 if ((mc->mc_data = malloc(sizeof(struct mly_event), M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL) {
1201 mly_release_command(mc);
1202 return;
1203 }
1204 mc->mc_length = sizeof(struct mly_event);
1205 mc->mc_flags |= MLY_CMD_DATAIN;
1206 mc->mc_complete = mly_complete_event;
1207
1208 /*
1209 * Get an event number to fetch. It's possible that we've raced with another
1210 * context for the last event, in which case there will be no more events.
1211 */
1212 s = splcam();
1213 if (sc->mly_event_counter == sc->mly_event_waiting) {
1214 mly_release_command(mc);
1215 splx(s);
1216 return;
1217 }
1218 event = sc->mly_event_counter++;
1219 splx(s);
1220
1221 /*
1222 * Build the ioctl.
1223 *
1224 * At this point we are committed to sending this request, as it
1225 * will be the only one constructed for this particular event number.
1226 */
1227 mci = (struct mly_command_ioctl *)&mc->mc_packet->ioctl;
1228 mci->opcode = MDACMD_IOCTL;
1229 mci->data_size = sizeof(struct mly_event);
1230 mci->addr.phys.lun = (event >> 16) & 0xff;
1231 mci->addr.phys.target = (event >> 24) & 0xff;
1232 mci->addr.phys.channel = 0;
1233 mci->addr.phys.controller = 0;
1234 mci->timeout.value = 30;
1235 mci->timeout.scale = MLY_TIMEOUT_SECONDS;
1236 mci->sub_ioctl = MDACIOCTL_GETEVENT;
1237 mci->param.getevent.sequence_number_low = event & 0xffff;
1238
1239 debug(1, "fetch event %u", event);
1240
1241 /*
1242 * Submit the command.
1243 *
1244 * Note that failure of mly_start() will result in this event never being
1245 * fetched.
1246 */
1247 if (mly_start(mc) != 0) {
1248 mly_printf(sc, "couldn't fetch event %u\n", event);
1249 mly_release_command(mc);
1250 }
1251 }
1252
1253 /********************************************************************************
1254 * Handle the completion of an event poll.
1255 */
1256 static void
mly_complete_event(struct mly_command * mc)1257 mly_complete_event(struct mly_command *mc)
1258 {
1259 struct mly_softc *sc = mc->mc_sc;
1260 struct mly_event *me = (struct mly_event *)mc->mc_data;
1261
1262 debug_called(1);
1263
1264 /*
1265 * If the event was successfully fetched, process it.
1266 */
1267 if (mc->mc_status == SCSI_STATUS_OK) {
1268 mly_process_event(sc, me);
1269 free(me, M_DEVBUF);
1270 }
1271 mly_release_command(mc);
1272
1273 /*
1274 * Check for another event.
1275 */
1276 mly_check_event(sc);
1277 }
1278
1279 /********************************************************************************
1280 * Process a controller event.
1281 */
1282 static void
mly_process_event(struct mly_softc * sc,struct mly_event * me)1283 mly_process_event(struct mly_softc *sc, struct mly_event *me)
1284 {
1285 struct scsi_sense_data_fixed *ssd;
1286 char *fp, *tp;
1287 int bus, target, event, class, action;
1288
1289 ssd = (struct scsi_sense_data_fixed *)&me->sense[0];
1290
1291 /*
1292 * Errors can be reported using vendor-unique sense data. In this case, the
1293 * event code will be 0x1c (Request sense data present), the sense key will
1294 * be 0x09 (vendor specific), the MSB of the ASC will be set, and the
1295 * actual event code will be a 16-bit value comprised of the ASCQ (low byte)
1296 * and low seven bits of the ASC (low seven bits of the high byte).
1297 */
1298 if ((me->code == 0x1c) &&
1299 ((ssd->flags & SSD_KEY) == SSD_KEY_Vendor_Specific) &&
1300 (ssd->add_sense_code & 0x80)) {
1301 event = ((int)(ssd->add_sense_code & ~0x80) << 8) + ssd->add_sense_code_qual;
1302 } else {
1303 event = me->code;
1304 }
1305
1306 /* look up event, get codes */
1307 fp = mly_describe_code(mly_table_event, event);
1308
1309 debug(1, "Event %d code 0x%x", me->sequence_number, me->code);
1310
1311 /* quiet event? */
1312 class = fp[0];
1313 if (isupper(class) && bootverbose)
1314 class = tolower(class);
1315
1316 /* get action code, text string */
1317 action = fp[1];
1318 tp = &fp[2];
1319
1320 /*
1321 * Print some information about the event.
1322 *
1323 * This code uses a table derived from the corresponding portion of the Linux
1324 * driver, and thus the parser is very similar.
1325 */
1326 switch(class) {
1327 case 'p': /* error on physical device */
1328 mly_printf(sc, "physical device %d:%d %s\n", me->channel, me->target, tp);
1329 if (action == 'r')
1330 sc->mly_btl[me->channel][me->target].mb_flags |= MLY_BTL_RESCAN;
1331 break;
1332 case 'l': /* error on logical unit */
1333 case 'm': /* message about logical unit */
1334 bus = MLY_LOGDEV_BUS(sc, me->lun);
1335 target = MLY_LOGDEV_TARGET(sc, me->lun);
1336 mly_name_device(sc, bus, target);
1337 mly_printf(sc, "logical device %d (%s) %s\n", me->lun, sc->mly_btl[bus][target].mb_name, tp);
1338 if (action == 'r')
1339 sc->mly_btl[bus][target].mb_flags |= MLY_BTL_RESCAN;
1340 break;
1341 break;
1342 case 's': /* report of sense data */
1343 if (((ssd->flags & SSD_KEY) == SSD_KEY_NO_SENSE) ||
1344 (((ssd->flags & SSD_KEY) == SSD_KEY_NOT_READY) &&
1345 (ssd->add_sense_code == 0x04) &&
1346 ((ssd->add_sense_code_qual == 0x01) || (ssd->add_sense_code_qual == 0x02))))
1347 break; /* ignore NO_SENSE or NOT_READY in one case */
1348
1349 mly_printf(sc, "physical device %d:%d %s\n", me->channel, me->target, tp);
1350 mly_printf(sc, " sense key %d asc %02x ascq %02x\n",
1351 ssd->flags & SSD_KEY, ssd->add_sense_code, ssd->add_sense_code_qual);
1352 mly_printf(sc, " info %4D csi %4D\n", ssd->info, "", ssd->cmd_spec_info, "");
1353 if (action == 'r')
1354 sc->mly_btl[me->channel][me->target].mb_flags |= MLY_BTL_RESCAN;
1355 break;
1356 case 'e':
1357 mly_printf(sc, tp, me->target, me->lun);
1358 printf("\n");
1359 break;
1360 case 'c':
1361 mly_printf(sc, "controller %s\n", tp);
1362 break;
1363 case '?':
1364 mly_printf(sc, "%s - %d\n", tp, me->code);
1365 break;
1366 default: /* probably a 'noisy' event being ignored */
1367 break;
1368 }
1369 }
1370
1371 /********************************************************************************
1372 * Perform periodic activities.
1373 */
1374 static void
mly_periodic(void * data)1375 mly_periodic(void *data)
1376 {
1377 struct mly_softc *sc = (struct mly_softc *)data;
1378 int bus, target;
1379
1380 debug_called(2);
1381
1382 /*
1383 * Scan devices.
1384 */
1385 for (bus = 0; bus < sc->mly_cam_channels; bus++) {
1386 if (MLY_BUS_IS_VALID(sc, bus)) {
1387 for (target = 0; target < MLY_MAX_TARGETS; target++) {
1388
1389 /* ignore the controller in this scan */
1390 if (target == sc->mly_controllerparam->initiator_id)
1391 continue;
1392
1393 /* perform device rescan? */
1394 if (sc->mly_btl[bus][target].mb_flags & MLY_BTL_RESCAN)
1395 mly_rescan_btl(sc, bus, target);
1396 }
1397 }
1398 }
1399
1400 /* check for controller events */
1401 mly_check_event(sc);
1402
1403 /* reschedule ourselves */
1404 sc->mly_periodic = timeout(mly_periodic, sc, MLY_PERIODIC_INTERVAL * hz);
1405 }
1406
1407 /********************************************************************************
1408 ********************************************************************************
1409 Command Processing
1410 ********************************************************************************
1411 ********************************************************************************/
1412
1413 /********************************************************************************
1414 * Run a command and wait for it to complete.
1415 *
1416 */
1417 static int
mly_immediate_command(struct mly_command * mc)1418 mly_immediate_command(struct mly_command *mc)
1419 {
1420 struct mly_softc *sc = mc->mc_sc;
1421 int error, s;
1422
1423 debug_called(1);
1424
1425 /* spinning at splcam is ugly, but we're only used during controller init */
1426 s = splcam();
1427 if ((error = mly_start(mc))) {
1428 splx(s);
1429 return(error);
1430 }
1431
1432 if (sc->mly_state & MLY_STATE_INTERRUPTS_ON) {
1433 /* sleep on the command */
1434 while(!(mc->mc_flags & MLY_CMD_COMPLETE)) {
1435 tsleep(mc, PRIBIO, "mlywait", 0);
1436 }
1437 } else {
1438 /* spin and collect status while we do */
1439 while(!(mc->mc_flags & MLY_CMD_COMPLETE)) {
1440 mly_done(mc->mc_sc);
1441 }
1442 }
1443 splx(s);
1444 return(0);
1445 }
1446
1447 /********************************************************************************
1448 * Deliver a command to the controller.
1449 *
1450 * XXX it would be good to just queue commands that we can't submit immediately
1451 * and send them later, but we probably want a wrapper for that so that
1452 * we don't hang on a failed submission for an immediate command.
1453 */
1454 static int
mly_start(struct mly_command * mc)1455 mly_start(struct mly_command *mc)
1456 {
1457 struct mly_softc *sc = mc->mc_sc;
1458 union mly_command_packet *pkt;
1459 int s;
1460
1461 debug_called(2);
1462
1463 /*
1464 * Set the command up for delivery to the controller.
1465 */
1466 mly_map_command(mc);
1467 mc->mc_packet->generic.command_id = mc->mc_slot;
1468
1469 #ifdef MLY_DEBUG
1470 mc->mc_timestamp = time_second;
1471 #endif
1472
1473 s = splcam();
1474
1475 /*
1476 * Do we have to use the hardware mailbox?
1477 */
1478 if (!(sc->mly_state & MLY_STATE_MMBOX_ACTIVE)) {
1479 /*
1480 * Check to see if the controller is ready for us.
1481 */
1482 if (MLY_IDBR_TRUE(sc, MLY_HM_CMDSENT)) {
1483 splx(s);
1484 return(EBUSY);
1485 }
1486 mc->mc_flags |= MLY_CMD_BUSY;
1487
1488 /*
1489 * It's ready, send the command.
1490 */
1491 MLY_SET_MBOX(sc, sc->mly_command_mailbox, &mc->mc_packetphys);
1492 MLY_SET_REG(sc, sc->mly_idbr, MLY_HM_CMDSENT);
1493
1494 } else { /* use memory-mailbox mode */
1495
1496 pkt = &sc->mly_mmbox->mmm_command[sc->mly_mmbox_command_index];
1497
1498 /* check to see if the next index is free yet */
1499 if (pkt->mmbox.flag != 0) {
1500 splx(s);
1501 return(EBUSY);
1502 }
1503 mc->mc_flags |= MLY_CMD_BUSY;
1504
1505 /* copy in new command */
1506 bcopy(mc->mc_packet->mmbox.data, pkt->mmbox.data, sizeof(pkt->mmbox.data));
1507 /* barrier to ensure completion of previous write before we write the flag */
1508 bus_space_barrier(sc->mly_btag, sc->mly_bhandle, 0, 0,
1509 BUS_SPACE_BARRIER_WRITE);
1510 /* copy flag last */
1511 pkt->mmbox.flag = mc->mc_packet->mmbox.flag;
1512 /* barrier to ensure completion of previous write before we notify the controller */
1513 bus_space_barrier(sc->mly_btag, sc->mly_bhandle, 0, 0,
1514 BUS_SPACE_BARRIER_WRITE);
1515
1516 /* signal controller, update index */
1517 MLY_SET_REG(sc, sc->mly_idbr, MLY_AM_CMDSENT);
1518 sc->mly_mmbox_command_index = (sc->mly_mmbox_command_index + 1) % MLY_MMBOX_COMMANDS;
1519 }
1520
1521 mly_enqueue_busy(mc);
1522 splx(s);
1523 return(0);
1524 }
1525
1526 /********************************************************************************
1527 * Pick up command status from the controller, schedule a completion event
1528 */
1529 static void
mly_done(struct mly_softc * sc)1530 mly_done(struct mly_softc *sc)
1531 {
1532 struct mly_command *mc;
1533 union mly_status_packet *sp;
1534 u_int16_t slot;
1535 int s, worked;
1536
1537 s = splcam();
1538 worked = 0;
1539
1540 /* pick up hardware-mailbox commands */
1541 if (MLY_ODBR_TRUE(sc, MLY_HM_STSREADY)) {
1542 slot = MLY_GET_REG2(sc, sc->mly_status_mailbox);
1543 if (slot < MLY_SLOT_MAX) {
1544 mc = &sc->mly_command[slot - MLY_SLOT_START];
1545 mc->mc_status = MLY_GET_REG(sc, sc->mly_status_mailbox + 2);
1546 mc->mc_sense = MLY_GET_REG(sc, sc->mly_status_mailbox + 3);
1547 mc->mc_resid = MLY_GET_REG4(sc, sc->mly_status_mailbox + 4);
1548 mly_remove_busy(mc);
1549 mc->mc_flags &= ~MLY_CMD_BUSY;
1550 mly_enqueue_complete(mc);
1551 worked = 1;
1552 } else {
1553 /* slot 0xffff may mean "extremely bogus command" */
1554 mly_printf(sc, "got HM completion for illegal slot %u\n", slot);
1555 }
1556 /* unconditionally acknowledge status */
1557 MLY_SET_REG(sc, sc->mly_odbr, MLY_HM_STSREADY);
1558 MLY_SET_REG(sc, sc->mly_idbr, MLY_HM_STSACK);
1559 }
1560
1561 /* pick up memory-mailbox commands */
1562 if (MLY_ODBR_TRUE(sc, MLY_AM_STSREADY)) {
1563 for (;;) {
1564 sp = &sc->mly_mmbox->mmm_status[sc->mly_mmbox_status_index];
1565
1566 /* check for more status */
1567 if (sp->mmbox.flag == 0)
1568 break;
1569
1570 /* get slot number */
1571 slot = sp->status.command_id;
1572 if (slot < MLY_SLOT_MAX) {
1573 mc = &sc->mly_command[slot - MLY_SLOT_START];
1574 mc->mc_status = sp->status.status;
1575 mc->mc_sense = sp->status.sense_length;
1576 mc->mc_resid = sp->status.residue;
1577 mly_remove_busy(mc);
1578 mc->mc_flags &= ~MLY_CMD_BUSY;
1579 mly_enqueue_complete(mc);
1580 worked = 1;
1581 } else {
1582 /* slot 0xffff may mean "extremely bogus command" */
1583 mly_printf(sc, "got AM completion for illegal slot %u at %d\n",
1584 slot, sc->mly_mmbox_status_index);
1585 }
1586
1587 /* clear and move to next index */
1588 sp->mmbox.flag = 0;
1589 sc->mly_mmbox_status_index = (sc->mly_mmbox_status_index + 1) % MLY_MMBOX_STATUS;
1590 }
1591 /* acknowledge that we have collected status value(s) */
1592 MLY_SET_REG(sc, sc->mly_odbr, MLY_AM_STSREADY);
1593 }
1594
1595 splx(s);
1596 if (worked) {
1597 if (sc->mly_state & MLY_STATE_INTERRUPTS_ON)
1598 taskqueue_enqueue(taskqueue_swi_giant, &sc->mly_task_complete);
1599 else
1600 mly_complete(sc, 0);
1601 }
1602 }
1603
1604 /********************************************************************************
1605 * Process completed commands
1606 */
1607 static void
mly_complete(void * context,int pending)1608 mly_complete(void *context, int pending)
1609 {
1610 struct mly_softc *sc = (struct mly_softc *)context;
1611 struct mly_command *mc;
1612 void (* mc_complete)(struct mly_command *mc);
1613
1614
1615 debug_called(2);
1616
1617 /*
1618 * Spin pulling commands off the completed queue and processing them.
1619 */
1620 while ((mc = mly_dequeue_complete(sc)) != NULL) {
1621
1622 /*
1623 * Free controller resources, mark command complete.
1624 *
1625 * Note that as soon as we mark the command complete, it may be freed
1626 * out from under us, so we need to save the mc_complete field in
1627 * order to later avoid dereferencing mc. (We would not expect to
1628 * have a polling/sleeping consumer with mc_complete != NULL).
1629 */
1630 mly_unmap_command(mc);
1631 mc_complete = mc->mc_complete;
1632 mc->mc_flags |= MLY_CMD_COMPLETE;
1633
1634 /*
1635 * Call completion handler or wake up sleeping consumer.
1636 */
1637 if (mc_complete != NULL) {
1638 mc_complete(mc);
1639 } else {
1640 wakeup(mc);
1641 }
1642 }
1643
1644 /*
1645 * XXX if we are deferring commands due to controller-busy status, we should
1646 * retry submitting them here.
1647 */
1648 }
1649
1650 /********************************************************************************
1651 ********************************************************************************
1652 Command Buffer Management
1653 ********************************************************************************
1654 ********************************************************************************/
1655
1656 /********************************************************************************
1657 * Allocate a command.
1658 */
1659 static int
mly_alloc_command(struct mly_softc * sc,struct mly_command ** mcp)1660 mly_alloc_command(struct mly_softc *sc, struct mly_command **mcp)
1661 {
1662 struct mly_command *mc;
1663
1664 debug_called(3);
1665
1666 if ((mc = mly_dequeue_free(sc)) == NULL)
1667 return(ENOMEM);
1668
1669 *mcp = mc;
1670 return(0);
1671 }
1672
1673 /********************************************************************************
1674 * Release a command back to the freelist.
1675 */
1676 static void
mly_release_command(struct mly_command * mc)1677 mly_release_command(struct mly_command *mc)
1678 {
1679 debug_called(3);
1680
1681 /*
1682 * Fill in parts of the command that may cause confusion if
1683 * a consumer doesn't when we are later allocated.
1684 */
1685 mc->mc_data = NULL;
1686 mc->mc_flags = 0;
1687 mc->mc_complete = NULL;
1688 mc->mc_private = NULL;
1689
1690 /*
1691 * By default, we set up to overwrite the command packet with
1692 * sense information.
1693 */
1694 mc->mc_packet->generic.sense_buffer_address = mc->mc_packetphys;
1695 mc->mc_packet->generic.maximum_sense_size = sizeof(union mly_command_packet);
1696
1697 mly_enqueue_free(mc);
1698 }
1699
1700 /********************************************************************************
1701 * Map helper for command allocation.
1702 */
1703 static void
mly_alloc_commands_map(void * arg,bus_dma_segment_t * segs,int nseg,int error)1704 mly_alloc_commands_map(void *arg, bus_dma_segment_t *segs, int nseg, int error)
1705 {
1706 struct mly_softc *sc = (struct mly_softc *)arg;
1707
1708 debug_called(1);
1709
1710 sc->mly_packetphys = segs[0].ds_addr;
1711 }
1712
1713 /********************************************************************************
1714 * Allocate and initialise command and packet structures.
1715 *
1716 * If the controller supports fewer than MLY_MAX_COMMANDS commands, limit our
1717 * allocation to that number. If we don't yet know how many commands the
1718 * controller supports, allocate a very small set (suitable for initialisation
1719 * purposes only).
1720 */
1721 static int
mly_alloc_commands(struct mly_softc * sc)1722 mly_alloc_commands(struct mly_softc *sc)
1723 {
1724 struct mly_command *mc;
1725 int i, ncmd;
1726
1727 if (sc->mly_controllerinfo == NULL) {
1728 ncmd = 4;
1729 } else {
1730 ncmd = min(MLY_MAX_COMMANDS, sc->mly_controllerinfo->maximum_parallel_commands);
1731 }
1732
1733 /*
1734 * Allocate enough space for all the command packets in one chunk and
1735 * map them permanently into controller-visible space.
1736 */
1737 if (bus_dmamem_alloc(sc->mly_packet_dmat, (void **)&sc->mly_packet,
1738 BUS_DMA_NOWAIT, &sc->mly_packetmap)) {
1739 return(ENOMEM);
1740 }
1741 if (bus_dmamap_load(sc->mly_packet_dmat, sc->mly_packetmap, sc->mly_packet,
1742 ncmd * sizeof(union mly_command_packet),
1743 mly_alloc_commands_map, sc, BUS_DMA_NOWAIT) != 0)
1744 return (ENOMEM);
1745
1746 for (i = 0; i < ncmd; i++) {
1747 mc = &sc->mly_command[i];
1748 bzero(mc, sizeof(*mc));
1749 mc->mc_sc = sc;
1750 mc->mc_slot = MLY_SLOT_START + i;
1751 mc->mc_packet = sc->mly_packet + i;
1752 mc->mc_packetphys = sc->mly_packetphys + (i * sizeof(union mly_command_packet));
1753 if (!bus_dmamap_create(sc->mly_buffer_dmat, 0, &mc->mc_datamap))
1754 mly_release_command(mc);
1755 }
1756 return(0);
1757 }
1758
1759 /********************************************************************************
1760 * Free all the storage held by commands.
1761 *
1762 * Must be called with all commands on the free list.
1763 */
1764 static void
mly_release_commands(struct mly_softc * sc)1765 mly_release_commands(struct mly_softc *sc)
1766 {
1767 struct mly_command *mc;
1768
1769 /* throw away command buffer DMA maps */
1770 while (mly_alloc_command(sc, &mc) == 0)
1771 bus_dmamap_destroy(sc->mly_buffer_dmat, mc->mc_datamap);
1772
1773 /* release the packet storage */
1774 if (sc->mly_packet != NULL) {
1775 bus_dmamap_unload(sc->mly_packet_dmat, sc->mly_packetmap);
1776 bus_dmamem_free(sc->mly_packet_dmat, sc->mly_packet, sc->mly_packetmap);
1777 sc->mly_packet = NULL;
1778 }
1779 }
1780
1781
1782 /********************************************************************************
1783 * Command-mapping helper function - populate this command's s/g table
1784 * with the s/g entries for its data.
1785 */
1786 static void
mly_map_command_sg(void * arg,bus_dma_segment_t * segs,int nseg,int error)1787 mly_map_command_sg(void *arg, bus_dma_segment_t *segs, int nseg, int error)
1788 {
1789 struct mly_command *mc = (struct mly_command *)arg;
1790 struct mly_softc *sc = mc->mc_sc;
1791 struct mly_command_generic *gen = &(mc->mc_packet->generic);
1792 struct mly_sg_entry *sg;
1793 int i, tabofs;
1794
1795 debug_called(2);
1796
1797 /* can we use the transfer structure directly? */
1798 if (nseg <= 2) {
1799 sg = &gen->transfer.direct.sg[0];
1800 gen->command_control.extended_sg_table = 0;
1801 } else {
1802 tabofs = ((mc->mc_slot - MLY_SLOT_START) * MLY_MAX_SGENTRIES);
1803 sg = sc->mly_sg_table + tabofs;
1804 gen->transfer.indirect.entries[0] = nseg;
1805 gen->transfer.indirect.table_physaddr[0] = sc->mly_sg_busaddr + (tabofs * sizeof(struct mly_sg_entry));
1806 gen->command_control.extended_sg_table = 1;
1807 }
1808
1809 /* copy the s/g table */
1810 for (i = 0; i < nseg; i++) {
1811 sg[i].physaddr = segs[i].ds_addr;
1812 sg[i].length = segs[i].ds_len;
1813 }
1814
1815 }
1816
1817 #if 0
1818 /********************************************************************************
1819 * Command-mapping helper function - save the cdb's physical address.
1820 *
1821 * We don't support 'large' SCSI commands at this time, so this is unused.
1822 */
1823 static void
1824 mly_map_command_cdb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
1825 {
1826 struct mly_command *mc = (struct mly_command *)arg;
1827
1828 debug_called(2);
1829
1830 /* XXX can we safely assume that a CDB will never cross a page boundary? */
1831 if ((segs[0].ds_addr % PAGE_SIZE) >
1832 ((segs[0].ds_addr + mc->mc_packet->scsi_large.cdb_length) % PAGE_SIZE))
1833 panic("cdb crosses page boundary");
1834
1835 /* fix up fields in the command packet */
1836 mc->mc_packet->scsi_large.cdb_physaddr = segs[0].ds_addr;
1837 }
1838 #endif
1839
1840 /********************************************************************************
1841 * Map a command into controller-visible space
1842 */
1843 static void
mly_map_command(struct mly_command * mc)1844 mly_map_command(struct mly_command *mc)
1845 {
1846 struct mly_softc *sc = mc->mc_sc;
1847
1848 debug_called(2);
1849
1850 /* don't map more than once */
1851 if (mc->mc_flags & MLY_CMD_MAPPED)
1852 return;
1853
1854 /* does the command have a data buffer? */
1855 if (mc->mc_data != NULL) {
1856 if (mc->mc_flags & MLY_CMD_CCB)
1857 bus_dmamap_load_ccb(sc->mly_buffer_dmat, mc->mc_datamap,
1858 mc->mc_data, mly_map_command_sg, mc, 0);
1859 else
1860 bus_dmamap_load(sc->mly_buffer_dmat, mc->mc_datamap,
1861 mc->mc_data, mc->mc_length,
1862 mly_map_command_sg, mc, 0);
1863 if (mc->mc_flags & MLY_CMD_DATAIN)
1864 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_PREREAD);
1865 if (mc->mc_flags & MLY_CMD_DATAOUT)
1866 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_PREWRITE);
1867 }
1868 mc->mc_flags |= MLY_CMD_MAPPED;
1869 }
1870
1871 /********************************************************************************
1872 * Unmap a command from controller-visible space
1873 */
1874 static void
mly_unmap_command(struct mly_command * mc)1875 mly_unmap_command(struct mly_command *mc)
1876 {
1877 struct mly_softc *sc = mc->mc_sc;
1878
1879 debug_called(2);
1880
1881 if (!(mc->mc_flags & MLY_CMD_MAPPED))
1882 return;
1883
1884 /* does the command have a data buffer? */
1885 if (mc->mc_data != NULL) {
1886 if (mc->mc_flags & MLY_CMD_DATAIN)
1887 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_POSTREAD);
1888 if (mc->mc_flags & MLY_CMD_DATAOUT)
1889 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_POSTWRITE);
1890
1891 bus_dmamap_unload(sc->mly_buffer_dmat, mc->mc_datamap);
1892 }
1893 mc->mc_flags &= ~MLY_CMD_MAPPED;
1894 }
1895
1896
1897 /********************************************************************************
1898 ********************************************************************************
1899 CAM interface
1900 ********************************************************************************
1901 ********************************************************************************/
1902
1903 /********************************************************************************
1904 * Attach the physical and virtual SCSI busses to CAM.
1905 *
1906 * Physical bus numbering starts from 0, virtual bus numbering from one greater
1907 * than the highest physical bus. Physical busses are only registered if
1908 * the kernel environment variable "hw.mly.register_physical_channels" is set.
1909 *
1910 * When we refer to a "bus", we are referring to the bus number registered with
1911 * the SIM, wheras a "channel" is a channel number given to the adapter. In order
1912 * to keep things simple, we map these 1:1, so "bus" and "channel" may be used
1913 * interchangeably.
1914 */
1915 static int
mly_cam_attach(struct mly_softc * sc)1916 mly_cam_attach(struct mly_softc *sc)
1917 {
1918 struct cam_devq *devq;
1919 int chn, i;
1920
1921 debug_called(1);
1922
1923 /*
1924 * Allocate a devq for all our channels combined.
1925 */
1926 if ((devq = cam_simq_alloc(sc->mly_controllerinfo->maximum_parallel_commands)) == NULL) {
1927 mly_printf(sc, "can't allocate CAM SIM queue\n");
1928 return(ENOMEM);
1929 }
1930
1931 /*
1932 * If physical channel registration has been requested, register these first.
1933 * Note that we enable tagged command queueing for physical channels.
1934 */
1935 if (testenv("hw.mly.register_physical_channels")) {
1936 chn = 0;
1937 for (i = 0; i < sc->mly_controllerinfo->physical_channels_present; i++, chn++) {
1938
1939 if ((sc->mly_cam_sim[chn] = cam_sim_alloc(mly_cam_action, mly_cam_poll, "mly", sc,
1940 device_get_unit(sc->mly_dev),
1941 &Giant,
1942 sc->mly_controllerinfo->maximum_parallel_commands,
1943 1, devq)) == NULL) {
1944 return(ENOMEM);
1945 }
1946 if (xpt_bus_register(sc->mly_cam_sim[chn], sc->mly_dev, chn)) {
1947 mly_printf(sc, "CAM XPT phsyical channel registration failed\n");
1948 return(ENXIO);
1949 }
1950 debug(1, "registered physical channel %d", chn);
1951 }
1952 }
1953
1954 /*
1955 * Register our virtual channels, with bus numbers matching channel numbers.
1956 */
1957 chn = sc->mly_controllerinfo->physical_channels_present;
1958 for (i = 0; i < sc->mly_controllerinfo->virtual_channels_present; i++, chn++) {
1959 if ((sc->mly_cam_sim[chn] = cam_sim_alloc(mly_cam_action, mly_cam_poll, "mly", sc,
1960 device_get_unit(sc->mly_dev),
1961 &Giant,
1962 sc->mly_controllerinfo->maximum_parallel_commands,
1963 0, devq)) == NULL) {
1964 return(ENOMEM);
1965 }
1966 if (xpt_bus_register(sc->mly_cam_sim[chn], sc->mly_dev, chn)) {
1967 mly_printf(sc, "CAM XPT virtual channel registration failed\n");
1968 return(ENXIO);
1969 }
1970 debug(1, "registered virtual channel %d", chn);
1971 }
1972
1973 /*
1974 * This is the total number of channels that (might have been) registered with
1975 * CAM. Some may not have been; check the mly_cam_sim array to be certain.
1976 */
1977 sc->mly_cam_channels = sc->mly_controllerinfo->physical_channels_present +
1978 sc->mly_controllerinfo->virtual_channels_present;
1979
1980 return(0);
1981 }
1982
1983 /********************************************************************************
1984 * Detach from CAM
1985 */
1986 static void
mly_cam_detach(struct mly_softc * sc)1987 mly_cam_detach(struct mly_softc *sc)
1988 {
1989 int i;
1990
1991 debug_called(1);
1992
1993 for (i = 0; i < sc->mly_cam_channels; i++) {
1994 if (sc->mly_cam_sim[i] != NULL) {
1995 xpt_bus_deregister(cam_sim_path(sc->mly_cam_sim[i]));
1996 cam_sim_free(sc->mly_cam_sim[i], 0);
1997 }
1998 }
1999 if (sc->mly_cam_devq != NULL)
2000 cam_simq_free(sc->mly_cam_devq);
2001 }
2002
2003 /************************************************************************
2004 * Rescan a device.
2005 */
2006 static void
mly_cam_rescan_btl(struct mly_softc * sc,int bus,int target)2007 mly_cam_rescan_btl(struct mly_softc *sc, int bus, int target)
2008 {
2009 union ccb *ccb;
2010
2011 debug_called(1);
2012
2013 if ((ccb = xpt_alloc_ccb()) == NULL) {
2014 mly_printf(sc, "rescan failed (can't allocate CCB)\n");
2015 return;
2016 }
2017 if (xpt_create_path(&ccb->ccb_h.path, NULL,
2018 cam_sim_path(sc->mly_cam_sim[bus]), target, 0) != CAM_REQ_CMP) {
2019 mly_printf(sc, "rescan failed (can't create path)\n");
2020 xpt_free_ccb(ccb);
2021 return;
2022 }
2023 debug(1, "rescan target %d:%d", bus, target);
2024 xpt_rescan(ccb);
2025 }
2026
2027 /********************************************************************************
2028 * Handle an action requested by CAM
2029 */
2030 static void
mly_cam_action(struct cam_sim * sim,union ccb * ccb)2031 mly_cam_action(struct cam_sim *sim, union ccb *ccb)
2032 {
2033 struct mly_softc *sc = cam_sim_softc(sim);
2034
2035 debug_called(2);
2036
2037 switch (ccb->ccb_h.func_code) {
2038
2039 /* perform SCSI I/O */
2040 case XPT_SCSI_IO:
2041 if (!mly_cam_action_io(sim, (struct ccb_scsiio *)&ccb->csio))
2042 return;
2043 break;
2044
2045 /* perform geometry calculations */
2046 case XPT_CALC_GEOMETRY:
2047 {
2048 struct ccb_calc_geometry *ccg = &ccb->ccg;
2049 u_int32_t secs_per_cylinder;
2050
2051 debug(2, "XPT_CALC_GEOMETRY %d:%d:%d", cam_sim_bus(sim), ccb->ccb_h.target_id, ccb->ccb_h.target_lun);
2052
2053 if (sc->mly_controllerparam->bios_geometry == MLY_BIOSGEOM_8G) {
2054 ccg->heads = 255;
2055 ccg->secs_per_track = 63;
2056 } else { /* MLY_BIOSGEOM_2G */
2057 ccg->heads = 128;
2058 ccg->secs_per_track = 32;
2059 }
2060 secs_per_cylinder = ccg->heads * ccg->secs_per_track;
2061 ccg->cylinders = ccg->volume_size / secs_per_cylinder;
2062 ccb->ccb_h.status = CAM_REQ_CMP;
2063 break;
2064 }
2065
2066 /* handle path attribute inquiry */
2067 case XPT_PATH_INQ:
2068 {
2069 struct ccb_pathinq *cpi = &ccb->cpi;
2070
2071 debug(2, "XPT_PATH_INQ %d:%d:%d", cam_sim_bus(sim), ccb->ccb_h.target_id, ccb->ccb_h.target_lun);
2072
2073 cpi->version_num = 1;
2074 cpi->hba_inquiry = PI_TAG_ABLE; /* XXX extra flags for physical channels? */
2075 cpi->target_sprt = 0;
2076 cpi->hba_misc = 0;
2077 cpi->max_target = MLY_MAX_TARGETS - 1;
2078 cpi->max_lun = MLY_MAX_LUNS - 1;
2079 cpi->initiator_id = sc->mly_controllerparam->initiator_id;
2080 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
2081 strncpy(cpi->hba_vid, "FreeBSD", HBA_IDLEN);
2082 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
2083 cpi->unit_number = cam_sim_unit(sim);
2084 cpi->bus_id = cam_sim_bus(sim);
2085 cpi->base_transfer_speed = 132 * 1024; /* XXX what to set this to? */
2086 cpi->transport = XPORT_SPI;
2087 cpi->transport_version = 2;
2088 cpi->protocol = PROTO_SCSI;
2089 cpi->protocol_version = SCSI_REV_2;
2090 ccb->ccb_h.status = CAM_REQ_CMP;
2091 break;
2092 }
2093
2094 case XPT_GET_TRAN_SETTINGS:
2095 {
2096 struct ccb_trans_settings *cts = &ccb->cts;
2097 int bus, target;
2098 struct ccb_trans_settings_scsi *scsi = &cts->proto_specific.scsi;
2099 struct ccb_trans_settings_spi *spi = &cts->xport_specific.spi;
2100
2101 cts->protocol = PROTO_SCSI;
2102 cts->protocol_version = SCSI_REV_2;
2103 cts->transport = XPORT_SPI;
2104 cts->transport_version = 2;
2105
2106 scsi->flags = 0;
2107 scsi->valid = 0;
2108 spi->flags = 0;
2109 spi->valid = 0;
2110
2111 bus = cam_sim_bus(sim);
2112 target = cts->ccb_h.target_id;
2113 debug(2, "XPT_GET_TRAN_SETTINGS %d:%d", bus, target);
2114 /* logical device? */
2115 if (sc->mly_btl[bus][target].mb_flags & MLY_BTL_LOGICAL) {
2116 /* nothing special for these */
2117 /* physical device? */
2118 } else if (sc->mly_btl[bus][target].mb_flags & MLY_BTL_PHYSICAL) {
2119 /* allow CAM to try tagged transactions */
2120 scsi->flags |= CTS_SCSI_FLAGS_TAG_ENB;
2121 scsi->valid |= CTS_SCSI_VALID_TQ;
2122
2123 /* convert speed (MHz) to usec */
2124 if (sc->mly_btl[bus][target].mb_speed == 0) {
2125 spi->sync_period = 1000000 / 5;
2126 } else {
2127 spi->sync_period = 1000000 / sc->mly_btl[bus][target].mb_speed;
2128 }
2129
2130 /* convert bus width to CAM internal encoding */
2131 switch (sc->mly_btl[bus][target].mb_width) {
2132 case 32:
2133 spi->bus_width = MSG_EXT_WDTR_BUS_32_BIT;
2134 break;
2135 case 16:
2136 spi->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
2137 break;
2138 case 8:
2139 default:
2140 spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
2141 break;
2142 }
2143 spi->valid |= CTS_SPI_VALID_SYNC_RATE | CTS_SPI_VALID_BUS_WIDTH;
2144
2145 /* not a device, bail out */
2146 } else {
2147 cts->ccb_h.status = CAM_REQ_CMP_ERR;
2148 break;
2149 }
2150
2151 /* disconnect always OK */
2152 spi->flags |= CTS_SPI_FLAGS_DISC_ENB;
2153 spi->valid |= CTS_SPI_VALID_DISC;
2154
2155 cts->ccb_h.status = CAM_REQ_CMP;
2156 break;
2157 }
2158
2159 default: /* we can't do this */
2160 debug(2, "unspported func_code = 0x%x", ccb->ccb_h.func_code);
2161 ccb->ccb_h.status = CAM_REQ_INVALID;
2162 break;
2163 }
2164
2165 xpt_done(ccb);
2166 }
2167
2168 /********************************************************************************
2169 * Handle an I/O operation requested by CAM
2170 */
2171 static int
mly_cam_action_io(struct cam_sim * sim,struct ccb_scsiio * csio)2172 mly_cam_action_io(struct cam_sim *sim, struct ccb_scsiio *csio)
2173 {
2174 struct mly_softc *sc = cam_sim_softc(sim);
2175 struct mly_command *mc;
2176 struct mly_command_scsi_small *ss;
2177 int bus, target;
2178 int error;
2179 int s;
2180
2181 bus = cam_sim_bus(sim);
2182 target = csio->ccb_h.target_id;
2183
2184 debug(2, "XPT_SCSI_IO %d:%d:%d", bus, target, csio->ccb_h.target_lun);
2185
2186 /* validate bus number */
2187 if (!MLY_BUS_IS_VALID(sc, bus)) {
2188 debug(0, " invalid bus %d", bus);
2189 csio->ccb_h.status = CAM_REQ_CMP_ERR;
2190 }
2191
2192 /* check for I/O attempt to a protected device */
2193 if (sc->mly_btl[bus][target].mb_flags & MLY_BTL_PROTECTED) {
2194 debug(2, " device protected");
2195 csio->ccb_h.status = CAM_REQ_CMP_ERR;
2196 }
2197
2198 /* check for I/O attempt to nonexistent device */
2199 if (!(sc->mly_btl[bus][target].mb_flags & (MLY_BTL_LOGICAL | MLY_BTL_PHYSICAL))) {
2200 debug(2, " device %d:%d does not exist", bus, target);
2201 csio->ccb_h.status = CAM_REQ_CMP_ERR;
2202 }
2203
2204 /* XXX increase if/when we support large SCSI commands */
2205 if (csio->cdb_len > MLY_CMD_SCSI_SMALL_CDB) {
2206 debug(0, " command too large (%d > %d)", csio->cdb_len, MLY_CMD_SCSI_SMALL_CDB);
2207 csio->ccb_h.status = CAM_REQ_CMP_ERR;
2208 }
2209
2210 /* check that the CDB pointer is not to a physical address */
2211 if ((csio->ccb_h.flags & CAM_CDB_POINTER) && (csio->ccb_h.flags & CAM_CDB_PHYS)) {
2212 debug(0, " CDB pointer is to physical address");
2213 csio->ccb_h.status = CAM_REQ_CMP_ERR;
2214 }
2215
2216 /* abandon aborted ccbs or those that have failed validation */
2217 if ((csio->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_INPROG) {
2218 debug(2, "abandoning CCB due to abort/validation failure");
2219 return(EINVAL);
2220 }
2221
2222 /*
2223 * Get a command, or push the ccb back to CAM and freeze the queue.
2224 */
2225 if ((error = mly_alloc_command(sc, &mc))) {
2226 s = splcam();
2227 xpt_freeze_simq(sim, 1);
2228 csio->ccb_h.status |= CAM_REQUEUE_REQ;
2229 sc->mly_qfrzn_cnt++;
2230 splx(s);
2231 return(error);
2232 }
2233
2234 /* build the command */
2235 mc->mc_data = csio;
2236 mc->mc_length = csio->dxfer_len;
2237 mc->mc_complete = mly_cam_complete;
2238 mc->mc_private = csio;
2239 mc->mc_flags |= MLY_CMD_CCB;
2240 /* XXX This code doesn't set the data direction in mc_flags. */
2241
2242 /* save the bus number in the ccb for later recovery XXX should be a better way */
2243 csio->ccb_h.sim_priv.entries[0].field = bus;
2244
2245 /* build the packet for the controller */
2246 ss = &mc->mc_packet->scsi_small;
2247 ss->opcode = MDACMD_SCSI;
2248 if (csio->ccb_h.flags & CAM_DIS_DISCONNECT)
2249 ss->command_control.disable_disconnect = 1;
2250 if ((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_OUT)
2251 ss->command_control.data_direction = MLY_CCB_WRITE;
2252 ss->data_size = csio->dxfer_len;
2253 ss->addr.phys.lun = csio->ccb_h.target_lun;
2254 ss->addr.phys.target = csio->ccb_h.target_id;
2255 ss->addr.phys.channel = bus;
2256 if (csio->ccb_h.timeout < (60 * 1000)) {
2257 ss->timeout.value = csio->ccb_h.timeout / 1000;
2258 ss->timeout.scale = MLY_TIMEOUT_SECONDS;
2259 } else if (csio->ccb_h.timeout < (60 * 60 * 1000)) {
2260 ss->timeout.value = csio->ccb_h.timeout / (60 * 1000);
2261 ss->timeout.scale = MLY_TIMEOUT_MINUTES;
2262 } else {
2263 ss->timeout.value = csio->ccb_h.timeout / (60 * 60 * 1000); /* overflow? */
2264 ss->timeout.scale = MLY_TIMEOUT_HOURS;
2265 }
2266 ss->maximum_sense_size = csio->sense_len;
2267 ss->cdb_length = csio->cdb_len;
2268 if (csio->ccb_h.flags & CAM_CDB_POINTER) {
2269 bcopy(csio->cdb_io.cdb_ptr, ss->cdb, csio->cdb_len);
2270 } else {
2271 bcopy(csio->cdb_io.cdb_bytes, ss->cdb, csio->cdb_len);
2272 }
2273
2274 /* give the command to the controller */
2275 if ((error = mly_start(mc))) {
2276 s = splcam();
2277 xpt_freeze_simq(sim, 1);
2278 csio->ccb_h.status |= CAM_REQUEUE_REQ;
2279 sc->mly_qfrzn_cnt++;
2280 splx(s);
2281 return(error);
2282 }
2283
2284 return(0);
2285 }
2286
2287 /********************************************************************************
2288 * Check for possibly-completed commands.
2289 */
2290 static void
mly_cam_poll(struct cam_sim * sim)2291 mly_cam_poll(struct cam_sim *sim)
2292 {
2293 struct mly_softc *sc = cam_sim_softc(sim);
2294
2295 debug_called(2);
2296
2297 mly_done(sc);
2298 }
2299
2300 /********************************************************************************
2301 * Handle completion of a command - pass results back through the CCB
2302 */
2303 static void
mly_cam_complete(struct mly_command * mc)2304 mly_cam_complete(struct mly_command *mc)
2305 {
2306 struct mly_softc *sc = mc->mc_sc;
2307 struct ccb_scsiio *csio = (struct ccb_scsiio *)mc->mc_private;
2308 struct scsi_inquiry_data *inq = (struct scsi_inquiry_data *)csio->data_ptr;
2309 struct mly_btl *btl;
2310 u_int8_t cmd;
2311 int bus, target;
2312 int s;
2313
2314 debug_called(2);
2315
2316 csio->scsi_status = mc->mc_status;
2317 switch(mc->mc_status) {
2318 case SCSI_STATUS_OK:
2319 /*
2320 * In order to report logical device type and status, we overwrite
2321 * the result of the INQUIRY command to logical devices.
2322 */
2323 bus = csio->ccb_h.sim_priv.entries[0].field;
2324 target = csio->ccb_h.target_id;
2325 /* XXX validate bus/target? */
2326 if (sc->mly_btl[bus][target].mb_flags & MLY_BTL_LOGICAL) {
2327 if (csio->ccb_h.flags & CAM_CDB_POINTER) {
2328 cmd = *csio->cdb_io.cdb_ptr;
2329 } else {
2330 cmd = csio->cdb_io.cdb_bytes[0];
2331 }
2332 if (cmd == INQUIRY) {
2333 btl = &sc->mly_btl[bus][target];
2334 padstr(inq->vendor, mly_describe_code(mly_table_device_type, btl->mb_type), 8);
2335 padstr(inq->product, mly_describe_code(mly_table_device_state, btl->mb_state), 16);
2336 padstr(inq->revision, "", 4);
2337 }
2338 }
2339
2340 debug(2, "SCSI_STATUS_OK");
2341 csio->ccb_h.status = CAM_REQ_CMP;
2342 break;
2343
2344 case SCSI_STATUS_CHECK_COND:
2345 debug(1, "SCSI_STATUS_CHECK_COND sense %d resid %d", mc->mc_sense, mc->mc_resid);
2346 csio->ccb_h.status = CAM_SCSI_STATUS_ERROR;
2347 bzero(&csio->sense_data, SSD_FULL_SIZE);
2348 bcopy(mc->mc_packet, &csio->sense_data, mc->mc_sense);
2349 csio->sense_len = mc->mc_sense;
2350 csio->ccb_h.status |= CAM_AUTOSNS_VALID;
2351 csio->resid = mc->mc_resid; /* XXX this is a signed value... */
2352 break;
2353
2354 case SCSI_STATUS_BUSY:
2355 debug(1, "SCSI_STATUS_BUSY");
2356 csio->ccb_h.status = CAM_SCSI_BUSY;
2357 break;
2358
2359 default:
2360 debug(1, "unknown status 0x%x", csio->scsi_status);
2361 csio->ccb_h.status = CAM_REQ_CMP_ERR;
2362 break;
2363 }
2364
2365 s = splcam();
2366 if (sc->mly_qfrzn_cnt) {
2367 csio->ccb_h.status |= CAM_RELEASE_SIMQ;
2368 sc->mly_qfrzn_cnt--;
2369 }
2370 splx(s);
2371
2372 xpt_done((union ccb *)csio);
2373 mly_release_command(mc);
2374 }
2375
2376 /********************************************************************************
2377 * Find a peripheral attahed at (bus),(target)
2378 */
2379 static struct cam_periph *
mly_find_periph(struct mly_softc * sc,int bus,int target)2380 mly_find_periph(struct mly_softc *sc, int bus, int target)
2381 {
2382 struct cam_periph *periph;
2383 struct cam_path *path;
2384 int status;
2385
2386 status = xpt_create_path(&path, NULL, cam_sim_path(sc->mly_cam_sim[bus]), target, 0);
2387 if (status == CAM_REQ_CMP) {
2388 periph = cam_periph_find(path, NULL);
2389 xpt_free_path(path);
2390 } else {
2391 periph = NULL;
2392 }
2393 return(periph);
2394 }
2395
2396 /********************************************************************************
2397 * Name the device at (bus)(target)
2398 */
2399 static int
mly_name_device(struct mly_softc * sc,int bus,int target)2400 mly_name_device(struct mly_softc *sc, int bus, int target)
2401 {
2402 struct cam_periph *periph;
2403
2404 if ((periph = mly_find_periph(sc, bus, target)) != NULL) {
2405 sprintf(sc->mly_btl[bus][target].mb_name, "%s%d", periph->periph_name, periph->unit_number);
2406 return(0);
2407 }
2408 sc->mly_btl[bus][target].mb_name[0] = 0;
2409 return(ENOENT);
2410 }
2411
2412 /********************************************************************************
2413 ********************************************************************************
2414 Hardware Control
2415 ********************************************************************************
2416 ********************************************************************************/
2417
2418 /********************************************************************************
2419 * Handshake with the firmware while the card is being initialised.
2420 */
2421 static int
mly_fwhandshake(struct mly_softc * sc)2422 mly_fwhandshake(struct mly_softc *sc)
2423 {
2424 u_int8_t error, param0, param1;
2425 int spinup = 0;
2426
2427 debug_called(1);
2428
2429 /* set HM_STSACK and let the firmware initialise */
2430 MLY_SET_REG(sc, sc->mly_idbr, MLY_HM_STSACK);
2431 DELAY(1000); /* too short? */
2432
2433 /* if HM_STSACK is still true, the controller is initialising */
2434 if (!MLY_IDBR_TRUE(sc, MLY_HM_STSACK))
2435 return(0);
2436 mly_printf(sc, "controller initialisation started\n");
2437
2438 /* spin waiting for initialisation to finish, or for a message to be delivered */
2439 while (MLY_IDBR_TRUE(sc, MLY_HM_STSACK)) {
2440 /* check for a message */
2441 if (MLY_ERROR_VALID(sc)) {
2442 error = MLY_GET_REG(sc, sc->mly_error_status) & ~MLY_MSG_EMPTY;
2443 param0 = MLY_GET_REG(sc, sc->mly_command_mailbox);
2444 param1 = MLY_GET_REG(sc, sc->mly_command_mailbox + 1);
2445
2446 switch(error) {
2447 case MLY_MSG_SPINUP:
2448 if (!spinup) {
2449 mly_printf(sc, "drive spinup in progress\n");
2450 spinup = 1; /* only print this once (should print drive being spun?) */
2451 }
2452 break;
2453 case MLY_MSG_RACE_RECOVERY_FAIL:
2454 mly_printf(sc, "mirror race recovery failed, one or more drives offline\n");
2455 break;
2456 case MLY_MSG_RACE_IN_PROGRESS:
2457 mly_printf(sc, "mirror race recovery in progress\n");
2458 break;
2459 case MLY_MSG_RACE_ON_CRITICAL:
2460 mly_printf(sc, "mirror race recovery on a critical drive\n");
2461 break;
2462 case MLY_MSG_PARITY_ERROR:
2463 mly_printf(sc, "FATAL MEMORY PARITY ERROR\n");
2464 return(ENXIO);
2465 default:
2466 mly_printf(sc, "unknown initialisation code 0x%x\n", error);
2467 }
2468 }
2469 }
2470 return(0);
2471 }
2472
2473 /********************************************************************************
2474 ********************************************************************************
2475 Debugging and Diagnostics
2476 ********************************************************************************
2477 ********************************************************************************/
2478
2479 /********************************************************************************
2480 * Print some information about the controller.
2481 */
2482 static void
mly_describe_controller(struct mly_softc * sc)2483 mly_describe_controller(struct mly_softc *sc)
2484 {
2485 struct mly_ioctl_getcontrollerinfo *mi = sc->mly_controllerinfo;
2486
2487 mly_printf(sc, "%16s, %d channel%s, firmware %d.%02d-%d-%02d (%02d%02d%02d%02d), %dMB RAM\n",
2488 mi->controller_name, mi->physical_channels_present, (mi->physical_channels_present) > 1 ? "s" : "",
2489 mi->fw_major, mi->fw_minor, mi->fw_turn, mi->fw_build, /* XXX turn encoding? */
2490 mi->fw_century, mi->fw_year, mi->fw_month, mi->fw_day,
2491 mi->memory_size);
2492
2493 if (bootverbose) {
2494 mly_printf(sc, "%s %s (%x), %dMHz %d-bit %.16s\n",
2495 mly_describe_code(mly_table_oemname, mi->oem_information),
2496 mly_describe_code(mly_table_controllertype, mi->controller_type), mi->controller_type,
2497 mi->interface_speed, mi->interface_width, mi->interface_name);
2498 mly_printf(sc, "%dMB %dMHz %d-bit %s%s%s, cache %dMB\n",
2499 mi->memory_size, mi->memory_speed, mi->memory_width,
2500 mly_describe_code(mly_table_memorytype, mi->memory_type),
2501 mi->memory_parity ? "+parity": "",mi->memory_ecc ? "+ECC": "",
2502 mi->cache_size);
2503 mly_printf(sc, "CPU: %s @ %dMHz\n",
2504 mly_describe_code(mly_table_cputype, mi->cpu[0].type), mi->cpu[0].speed);
2505 if (mi->l2cache_size != 0)
2506 mly_printf(sc, "%dKB L2 cache\n", mi->l2cache_size);
2507 if (mi->exmemory_size != 0)
2508 mly_printf(sc, "%dMB %dMHz %d-bit private %s%s%s\n",
2509 mi->exmemory_size, mi->exmemory_speed, mi->exmemory_width,
2510 mly_describe_code(mly_table_memorytype, mi->exmemory_type),
2511 mi->exmemory_parity ? "+parity": "",mi->exmemory_ecc ? "+ECC": "");
2512 mly_printf(sc, "battery backup %s\n", mi->bbu_present ? "present" : "not installed");
2513 mly_printf(sc, "maximum data transfer %d blocks, maximum sg entries/command %d\n",
2514 mi->maximum_block_count, mi->maximum_sg_entries);
2515 mly_printf(sc, "logical devices present/critical/offline %d/%d/%d\n",
2516 mi->logical_devices_present, mi->logical_devices_critical, mi->logical_devices_offline);
2517 mly_printf(sc, "physical devices present %d\n",
2518 mi->physical_devices_present);
2519 mly_printf(sc, "physical disks present/offline %d/%d\n",
2520 mi->physical_disks_present, mi->physical_disks_offline);
2521 mly_printf(sc, "%d physical channel%s, %d virtual channel%s of %d possible\n",
2522 mi->physical_channels_present, mi->physical_channels_present == 1 ? "" : "s",
2523 mi->virtual_channels_present, mi->virtual_channels_present == 1 ? "" : "s",
2524 mi->virtual_channels_possible);
2525 mly_printf(sc, "%d parallel commands supported\n", mi->maximum_parallel_commands);
2526 mly_printf(sc, "%dMB flash ROM, %d of %d maximum cycles\n",
2527 mi->flash_size, mi->flash_age, mi->flash_maximum_age);
2528 }
2529 }
2530
2531 #ifdef MLY_DEBUG
2532 /********************************************************************************
2533 * Print some controller state
2534 */
2535 static void
mly_printstate(struct mly_softc * sc)2536 mly_printstate(struct mly_softc *sc)
2537 {
2538 mly_printf(sc, "IDBR %02x ODBR %02x ERROR %02x (%x %x %x)\n",
2539 MLY_GET_REG(sc, sc->mly_idbr),
2540 MLY_GET_REG(sc, sc->mly_odbr),
2541 MLY_GET_REG(sc, sc->mly_error_status),
2542 sc->mly_idbr,
2543 sc->mly_odbr,
2544 sc->mly_error_status);
2545 mly_printf(sc, "IMASK %02x ISTATUS %02x\n",
2546 MLY_GET_REG(sc, sc->mly_interrupt_mask),
2547 MLY_GET_REG(sc, sc->mly_interrupt_status));
2548 mly_printf(sc, "COMMAND %02x %02x %02x %02x %02x %02x %02x %02x\n",
2549 MLY_GET_REG(sc, sc->mly_command_mailbox),
2550 MLY_GET_REG(sc, sc->mly_command_mailbox + 1),
2551 MLY_GET_REG(sc, sc->mly_command_mailbox + 2),
2552 MLY_GET_REG(sc, sc->mly_command_mailbox + 3),
2553 MLY_GET_REG(sc, sc->mly_command_mailbox + 4),
2554 MLY_GET_REG(sc, sc->mly_command_mailbox + 5),
2555 MLY_GET_REG(sc, sc->mly_command_mailbox + 6),
2556 MLY_GET_REG(sc, sc->mly_command_mailbox + 7));
2557 mly_printf(sc, "STATUS %02x %02x %02x %02x %02x %02x %02x %02x\n",
2558 MLY_GET_REG(sc, sc->mly_status_mailbox),
2559 MLY_GET_REG(sc, sc->mly_status_mailbox + 1),
2560 MLY_GET_REG(sc, sc->mly_status_mailbox + 2),
2561 MLY_GET_REG(sc, sc->mly_status_mailbox + 3),
2562 MLY_GET_REG(sc, sc->mly_status_mailbox + 4),
2563 MLY_GET_REG(sc, sc->mly_status_mailbox + 5),
2564 MLY_GET_REG(sc, sc->mly_status_mailbox + 6),
2565 MLY_GET_REG(sc, sc->mly_status_mailbox + 7));
2566 mly_printf(sc, " %04x %08x\n",
2567 MLY_GET_REG2(sc, sc->mly_status_mailbox),
2568 MLY_GET_REG4(sc, sc->mly_status_mailbox + 4));
2569 }
2570
2571 struct mly_softc *mly_softc0 = NULL;
2572 void
mly_printstate0(void)2573 mly_printstate0(void)
2574 {
2575 if (mly_softc0 != NULL)
2576 mly_printstate(mly_softc0);
2577 }
2578
2579 /********************************************************************************
2580 * Print a command
2581 */
2582 static void
mly_print_command(struct mly_command * mc)2583 mly_print_command(struct mly_command *mc)
2584 {
2585 struct mly_softc *sc = mc->mc_sc;
2586
2587 mly_printf(sc, "COMMAND @ %p\n", mc);
2588 mly_printf(sc, " slot %d\n", mc->mc_slot);
2589 mly_printf(sc, " status 0x%x\n", mc->mc_status);
2590 mly_printf(sc, " sense len %d\n", mc->mc_sense);
2591 mly_printf(sc, " resid %d\n", mc->mc_resid);
2592 mly_printf(sc, " packet %p/0x%llx\n", mc->mc_packet, mc->mc_packetphys);
2593 if (mc->mc_packet != NULL)
2594 mly_print_packet(mc);
2595 mly_printf(sc, " data %p/%d\n", mc->mc_data, mc->mc_length);
2596 mly_printf(sc, " flags %b\n", mc->mc_flags, "\20\1busy\2complete\3slotted\4mapped\5datain\6dataout\n");
2597 mly_printf(sc, " complete %p\n", mc->mc_complete);
2598 mly_printf(sc, " private %p\n", mc->mc_private);
2599 }
2600
2601 /********************************************************************************
2602 * Print a command packet
2603 */
2604 static void
mly_print_packet(struct mly_command * mc)2605 mly_print_packet(struct mly_command *mc)
2606 {
2607 struct mly_softc *sc = mc->mc_sc;
2608 struct mly_command_generic *ge = (struct mly_command_generic *)mc->mc_packet;
2609 struct mly_command_scsi_small *ss = (struct mly_command_scsi_small *)mc->mc_packet;
2610 struct mly_command_scsi_large *sl = (struct mly_command_scsi_large *)mc->mc_packet;
2611 struct mly_command_ioctl *io = (struct mly_command_ioctl *)mc->mc_packet;
2612 int transfer;
2613
2614 mly_printf(sc, " command_id %d\n", ge->command_id);
2615 mly_printf(sc, " opcode %d\n", ge->opcode);
2616 mly_printf(sc, " command_control fua %d dpo %d est %d dd %s nas %d ddis %d\n",
2617 ge->command_control.force_unit_access,
2618 ge->command_control.disable_page_out,
2619 ge->command_control.extended_sg_table,
2620 (ge->command_control.data_direction == MLY_CCB_WRITE) ? "WRITE" : "READ",
2621 ge->command_control.no_auto_sense,
2622 ge->command_control.disable_disconnect);
2623 mly_printf(sc, " data_size %d\n", ge->data_size);
2624 mly_printf(sc, " sense_buffer_address 0x%llx\n", ge->sense_buffer_address);
2625 mly_printf(sc, " lun %d\n", ge->addr.phys.lun);
2626 mly_printf(sc, " target %d\n", ge->addr.phys.target);
2627 mly_printf(sc, " channel %d\n", ge->addr.phys.channel);
2628 mly_printf(sc, " logical device %d\n", ge->addr.log.logdev);
2629 mly_printf(sc, " controller %d\n", ge->addr.phys.controller);
2630 mly_printf(sc, " timeout %d %s\n",
2631 ge->timeout.value,
2632 (ge->timeout.scale == MLY_TIMEOUT_SECONDS) ? "seconds" :
2633 ((ge->timeout.scale == MLY_TIMEOUT_MINUTES) ? "minutes" : "hours"));
2634 mly_printf(sc, " maximum_sense_size %d\n", ge->maximum_sense_size);
2635 switch(ge->opcode) {
2636 case MDACMD_SCSIPT:
2637 case MDACMD_SCSI:
2638 mly_printf(sc, " cdb length %d\n", ss->cdb_length);
2639 mly_printf(sc, " cdb %*D\n", ss->cdb_length, ss->cdb, " ");
2640 transfer = 1;
2641 break;
2642 case MDACMD_SCSILC:
2643 case MDACMD_SCSILCPT:
2644 mly_printf(sc, " cdb length %d\n", sl->cdb_length);
2645 mly_printf(sc, " cdb 0x%llx\n", sl->cdb_physaddr);
2646 transfer = 1;
2647 break;
2648 case MDACMD_IOCTL:
2649 mly_printf(sc, " sub_ioctl 0x%x\n", io->sub_ioctl);
2650 switch(io->sub_ioctl) {
2651 case MDACIOCTL_SETMEMORYMAILBOX:
2652 mly_printf(sc, " health_buffer_size %d\n",
2653 io->param.setmemorymailbox.health_buffer_size);
2654 mly_printf(sc, " health_buffer_phys 0x%llx\n",
2655 io->param.setmemorymailbox.health_buffer_physaddr);
2656 mly_printf(sc, " command_mailbox 0x%llx\n",
2657 io->param.setmemorymailbox.command_mailbox_physaddr);
2658 mly_printf(sc, " status_mailbox 0x%llx\n",
2659 io->param.setmemorymailbox.status_mailbox_physaddr);
2660 transfer = 0;
2661 break;
2662
2663 case MDACIOCTL_SETREALTIMECLOCK:
2664 case MDACIOCTL_GETHEALTHSTATUS:
2665 case MDACIOCTL_GETCONTROLLERINFO:
2666 case MDACIOCTL_GETLOGDEVINFOVALID:
2667 case MDACIOCTL_GETPHYSDEVINFOVALID:
2668 case MDACIOCTL_GETPHYSDEVSTATISTICS:
2669 case MDACIOCTL_GETLOGDEVSTATISTICS:
2670 case MDACIOCTL_GETCONTROLLERSTATISTICS:
2671 case MDACIOCTL_GETBDT_FOR_SYSDRIVE:
2672 case MDACIOCTL_CREATENEWCONF:
2673 case MDACIOCTL_ADDNEWCONF:
2674 case MDACIOCTL_GETDEVCONFINFO:
2675 case MDACIOCTL_GETFREESPACELIST:
2676 case MDACIOCTL_MORE:
2677 case MDACIOCTL_SETPHYSDEVPARAMETER:
2678 case MDACIOCTL_GETPHYSDEVPARAMETER:
2679 case MDACIOCTL_GETLOGDEVPARAMETER:
2680 case MDACIOCTL_SETLOGDEVPARAMETER:
2681 mly_printf(sc, " param %10D\n", io->param.data.param, " ");
2682 transfer = 1;
2683 break;
2684
2685 case MDACIOCTL_GETEVENT:
2686 mly_printf(sc, " event %d\n",
2687 io->param.getevent.sequence_number_low + ((u_int32_t)io->addr.log.logdev << 16));
2688 transfer = 1;
2689 break;
2690
2691 case MDACIOCTL_SETRAIDDEVSTATE:
2692 mly_printf(sc, " state %d\n", io->param.setraiddevstate.state);
2693 transfer = 0;
2694 break;
2695
2696 case MDACIOCTL_XLATEPHYSDEVTORAIDDEV:
2697 mly_printf(sc, " raid_device %d\n", io->param.xlatephysdevtoraiddev.raid_device);
2698 mly_printf(sc, " controller %d\n", io->param.xlatephysdevtoraiddev.controller);
2699 mly_printf(sc, " channel %d\n", io->param.xlatephysdevtoraiddev.channel);
2700 mly_printf(sc, " target %d\n", io->param.xlatephysdevtoraiddev.target);
2701 mly_printf(sc, " lun %d\n", io->param.xlatephysdevtoraiddev.lun);
2702 transfer = 0;
2703 break;
2704
2705 case MDACIOCTL_GETGROUPCONFINFO:
2706 mly_printf(sc, " group %d\n", io->param.getgroupconfinfo.group);
2707 transfer = 1;
2708 break;
2709
2710 case MDACIOCTL_GET_SUBSYSTEM_DATA:
2711 case MDACIOCTL_SET_SUBSYSTEM_DATA:
2712 case MDACIOCTL_STARTDISOCVERY:
2713 case MDACIOCTL_INITPHYSDEVSTART:
2714 case MDACIOCTL_INITPHYSDEVSTOP:
2715 case MDACIOCTL_INITRAIDDEVSTART:
2716 case MDACIOCTL_INITRAIDDEVSTOP:
2717 case MDACIOCTL_REBUILDRAIDDEVSTART:
2718 case MDACIOCTL_REBUILDRAIDDEVSTOP:
2719 case MDACIOCTL_MAKECONSISTENTDATASTART:
2720 case MDACIOCTL_MAKECONSISTENTDATASTOP:
2721 case MDACIOCTL_CONSISTENCYCHECKSTART:
2722 case MDACIOCTL_CONSISTENCYCHECKSTOP:
2723 case MDACIOCTL_RESETDEVICE:
2724 case MDACIOCTL_FLUSHDEVICEDATA:
2725 case MDACIOCTL_PAUSEDEVICE:
2726 case MDACIOCTL_UNPAUSEDEVICE:
2727 case MDACIOCTL_LOCATEDEVICE:
2728 case MDACIOCTL_SETMASTERSLAVEMODE:
2729 case MDACIOCTL_DELETERAIDDEV:
2730 case MDACIOCTL_REPLACEINTERNALDEV:
2731 case MDACIOCTL_CLEARCONF:
2732 case MDACIOCTL_GETCONTROLLERPARAMETER:
2733 case MDACIOCTL_SETCONTRLLERPARAMETER:
2734 case MDACIOCTL_CLEARCONFSUSPMODE:
2735 case MDACIOCTL_STOREIMAGE:
2736 case MDACIOCTL_READIMAGE:
2737 case MDACIOCTL_FLASHIMAGES:
2738 case MDACIOCTL_RENAMERAIDDEV:
2739 default: /* no idea what to print */
2740 transfer = 0;
2741 break;
2742 }
2743 break;
2744
2745 case MDACMD_IOCTLCHECK:
2746 case MDACMD_MEMCOPY:
2747 default:
2748 transfer = 0;
2749 break; /* print nothing */
2750 }
2751 if (transfer) {
2752 if (ge->command_control.extended_sg_table) {
2753 mly_printf(sc, " sg table 0x%llx/%d\n",
2754 ge->transfer.indirect.table_physaddr[0], ge->transfer.indirect.entries[0]);
2755 } else {
2756 mly_printf(sc, " 0000 0x%llx/%lld\n",
2757 ge->transfer.direct.sg[0].physaddr, ge->transfer.direct.sg[0].length);
2758 mly_printf(sc, " 0001 0x%llx/%lld\n",
2759 ge->transfer.direct.sg[1].physaddr, ge->transfer.direct.sg[1].length);
2760 }
2761 }
2762 }
2763
2764 /********************************************************************************
2765 * Panic in a slightly informative fashion
2766 */
2767 static void
mly_panic(struct mly_softc * sc,char * reason)2768 mly_panic(struct mly_softc *sc, char *reason)
2769 {
2770 mly_printstate(sc);
2771 panic(reason);
2772 }
2773
2774 /********************************************************************************
2775 * Print queue statistics, callable from DDB.
2776 */
2777 void
mly_print_controller(int controller)2778 mly_print_controller(int controller)
2779 {
2780 struct mly_softc *sc;
2781
2782 if ((sc = devclass_get_softc(devclass_find("mly"), controller)) == NULL) {
2783 printf("mly: controller %d invalid\n", controller);
2784 } else {
2785 device_printf(sc->mly_dev, "queue curr max\n");
2786 device_printf(sc->mly_dev, "free %04d/%04d\n",
2787 sc->mly_qstat[MLYQ_FREE].q_length, sc->mly_qstat[MLYQ_FREE].q_max);
2788 device_printf(sc->mly_dev, "busy %04d/%04d\n",
2789 sc->mly_qstat[MLYQ_BUSY].q_length, sc->mly_qstat[MLYQ_BUSY].q_max);
2790 device_printf(sc->mly_dev, "complete %04d/%04d\n",
2791 sc->mly_qstat[MLYQ_COMPLETE].q_length, sc->mly_qstat[MLYQ_COMPLETE].q_max);
2792 }
2793 }
2794 #endif
2795
2796
2797 /********************************************************************************
2798 ********************************************************************************
2799 Control device interface
2800 ********************************************************************************
2801 ********************************************************************************/
2802
2803 /********************************************************************************
2804 * Accept an open operation on the control device.
2805 */
2806 static int
mly_user_open(struct cdev * dev,int flags,int fmt,struct thread * td)2807 mly_user_open(struct cdev *dev, int flags, int fmt, struct thread *td)
2808 {
2809 struct mly_softc *sc = dev->si_drv1;
2810
2811 sc->mly_state |= MLY_STATE_OPEN;
2812 return(0);
2813 }
2814
2815 /********************************************************************************
2816 * Accept the last close on the control device.
2817 */
2818 static int
mly_user_close(struct cdev * dev,int flags,int fmt,struct thread * td)2819 mly_user_close(struct cdev *dev, int flags, int fmt, struct thread *td)
2820 {
2821 struct mly_softc *sc = dev->si_drv1;
2822
2823 sc->mly_state &= ~MLY_STATE_OPEN;
2824 return (0);
2825 }
2826
2827 /********************************************************************************
2828 * Handle controller-specific control operations.
2829 */
2830 static int
mly_user_ioctl(struct cdev * dev,u_long cmd,caddr_t addr,int32_t flag,struct thread * td)2831 mly_user_ioctl(struct cdev *dev, u_long cmd, caddr_t addr,
2832 int32_t flag, struct thread *td)
2833 {
2834 struct mly_softc *sc = (struct mly_softc *)dev->si_drv1;
2835 struct mly_user_command *uc = (struct mly_user_command *)addr;
2836 struct mly_user_health *uh = (struct mly_user_health *)addr;
2837
2838 switch(cmd) {
2839 case MLYIO_COMMAND:
2840 return(mly_user_command(sc, uc));
2841 case MLYIO_HEALTH:
2842 return(mly_user_health(sc, uh));
2843 default:
2844 return(ENOIOCTL);
2845 }
2846 }
2847
2848 /********************************************************************************
2849 * Execute a command passed in from userspace.
2850 *
2851 * The control structure contains the actual command for the controller, as well
2852 * as the user-space data pointer and data size, and an optional sense buffer
2853 * size/pointer. On completion, the data size is adjusted to the command
2854 * residual, and the sense buffer size to the size of the returned sense data.
2855 *
2856 */
2857 static int
mly_user_command(struct mly_softc * sc,struct mly_user_command * uc)2858 mly_user_command(struct mly_softc *sc, struct mly_user_command *uc)
2859 {
2860 struct mly_command *mc;
2861 int error, s;
2862
2863 /* allocate a command */
2864 if (mly_alloc_command(sc, &mc)) {
2865 error = ENOMEM;
2866 goto out; /* XXX Linux version will wait for a command */
2867 }
2868
2869 /* handle data size/direction */
2870 mc->mc_length = (uc->DataTransferLength >= 0) ? uc->DataTransferLength : -uc->DataTransferLength;
2871 if (mc->mc_length > 0) {
2872 if ((mc->mc_data = malloc(mc->mc_length, M_DEVBUF, M_NOWAIT)) == NULL) {
2873 error = ENOMEM;
2874 goto out;
2875 }
2876 }
2877 if (uc->DataTransferLength > 0) {
2878 mc->mc_flags |= MLY_CMD_DATAIN;
2879 bzero(mc->mc_data, mc->mc_length);
2880 }
2881 if (uc->DataTransferLength < 0) {
2882 mc->mc_flags |= MLY_CMD_DATAOUT;
2883 if ((error = copyin(uc->DataTransferBuffer, mc->mc_data, mc->mc_length)) != 0)
2884 goto out;
2885 }
2886
2887 /* copy the controller command */
2888 bcopy(&uc->CommandMailbox, mc->mc_packet, sizeof(uc->CommandMailbox));
2889
2890 /* clear command completion handler so that we get woken up */
2891 mc->mc_complete = NULL;
2892
2893 /* execute the command */
2894 if ((error = mly_start(mc)) != 0)
2895 goto out;
2896 s = splcam();
2897 while (!(mc->mc_flags & MLY_CMD_COMPLETE))
2898 tsleep(mc, PRIBIO, "mlyioctl", 0);
2899 splx(s);
2900
2901 /* return the data to userspace */
2902 if (uc->DataTransferLength > 0)
2903 if ((error = copyout(mc->mc_data, uc->DataTransferBuffer, mc->mc_length)) != 0)
2904 goto out;
2905
2906 /* return the sense buffer to userspace */
2907 if ((uc->RequestSenseLength > 0) && (mc->mc_sense > 0)) {
2908 if ((error = copyout(mc->mc_packet, uc->RequestSenseBuffer,
2909 min(uc->RequestSenseLength, mc->mc_sense))) != 0)
2910 goto out;
2911 }
2912
2913 /* return command results to userspace (caller will copy out) */
2914 uc->DataTransferLength = mc->mc_resid;
2915 uc->RequestSenseLength = min(uc->RequestSenseLength, mc->mc_sense);
2916 uc->CommandStatus = mc->mc_status;
2917 error = 0;
2918
2919 out:
2920 if (mc->mc_data != NULL)
2921 free(mc->mc_data, M_DEVBUF);
2922 if (mc != NULL)
2923 mly_release_command(mc);
2924 return(error);
2925 }
2926
2927 /********************************************************************************
2928 * Return health status to userspace. If the health change index in the user
2929 * structure does not match that currently exported by the controller, we
2930 * return the current status immediately. Otherwise, we block until either
2931 * interrupted or new status is delivered.
2932 */
2933 static int
mly_user_health(struct mly_softc * sc,struct mly_user_health * uh)2934 mly_user_health(struct mly_softc *sc, struct mly_user_health *uh)
2935 {
2936 struct mly_health_status mh;
2937 int error, s;
2938
2939 /* fetch the current health status from userspace */
2940 if ((error = copyin(uh->HealthStatusBuffer, &mh, sizeof(mh))) != 0)
2941 return(error);
2942
2943 /* spin waiting for a status update */
2944 s = splcam();
2945 error = EWOULDBLOCK;
2946 while ((error != 0) && (sc->mly_event_change == mh.change_counter))
2947 error = tsleep(&sc->mly_event_change, PRIBIO | PCATCH, "mlyhealth", 0);
2948 splx(s);
2949
2950 /* copy the controller's health status buffer out (there is a race here if it changes again) */
2951 error = copyout(&sc->mly_mmbox->mmm_health.status, uh->HealthStatusBuffer,
2952 sizeof(uh->HealthStatusBuffer));
2953 return(error);
2954 }
2955
2956 #ifdef MLY_DEBUG
2957 static int
mly_timeout(struct mly_softc * sc)2958 mly_timeout(struct mly_softc *sc)
2959 {
2960 struct mly_command *mc;
2961 int deadline;
2962
2963 deadline = time_second - MLY_CMD_TIMEOUT;
2964 TAILQ_FOREACH(mc, &sc->mly_busy, mc_link) {
2965 if ((mc->mc_timestamp < deadline)) {
2966 device_printf(sc->mly_dev,
2967 "COMMAND %p TIMEOUT AFTER %d SECONDS\n", mc,
2968 (int)(time_second - mc->mc_timestamp));
2969 }
2970 }
2971
2972 timeout((timeout_t *)mly_timeout, sc, MLY_CMD_TIMEOUT * hz);
2973
2974 return (0);
2975 }
2976 #endif
2977