1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2000, 2001 Michael Smith
5 * Copyright (c) 2000 BSDi
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: stable/12/sys/dev/mly/mly.c 371093 2021-11-25 17:42:43Z emaste $
30 */
31
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/malloc.h>
35 #include <sys/kernel.h>
36 #include <sys/bus.h>
37 #include <sys/conf.h>
38 #include <sys/ctype.h>
39 #include <sys/ioccom.h>
40 #include <sys/stat.h>
41
42 #include <machine/bus.h>
43 #include <machine/resource.h>
44 #include <sys/rman.h>
45
46 #include <cam/cam.h>
47 #include <cam/cam_ccb.h>
48 #include <cam/cam_periph.h>
49 #include <cam/cam_sim.h>
50 #include <cam/cam_xpt_sim.h>
51 #include <cam/scsi/scsi_all.h>
52 #include <cam/scsi/scsi_message.h>
53
54 #include <dev/pci/pcireg.h>
55 #include <dev/pci/pcivar.h>
56
57 #include <dev/mly/mlyreg.h>
58 #include <dev/mly/mlyio.h>
59 #include <dev/mly/mlyvar.h>
60 #include <dev/mly/mly_tables.h>
61
62 static int mly_probe(device_t dev);
63 static int mly_attach(device_t dev);
64 static int mly_pci_attach(struct mly_softc *sc);
65 static int mly_detach(device_t dev);
66 static int mly_shutdown(device_t dev);
67 static void mly_intr(void *arg);
68
69 static int mly_sg_map(struct mly_softc *sc);
70 static void mly_sg_map_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error);
71 static int mly_mmbox_map(struct mly_softc *sc);
72 static void mly_mmbox_map_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error);
73 static void mly_free(struct mly_softc *sc);
74
75 static int mly_get_controllerinfo(struct mly_softc *sc);
76 static void mly_scan_devices(struct mly_softc *sc);
77 static void mly_rescan_btl(struct mly_softc *sc, int bus, int target);
78 static void mly_complete_rescan(struct mly_command *mc);
79 static int mly_get_eventstatus(struct mly_softc *sc);
80 static int mly_enable_mmbox(struct mly_softc *sc);
81 static int mly_flush(struct mly_softc *sc);
82 static int mly_ioctl(struct mly_softc *sc, struct mly_command_ioctl *ioctl, void **data,
83 size_t datasize, u_int8_t *status, void *sense_buffer, size_t *sense_length);
84 static void mly_check_event(struct mly_softc *sc);
85 static void mly_fetch_event(struct mly_softc *sc);
86 static void mly_complete_event(struct mly_command *mc);
87 static void mly_process_event(struct mly_softc *sc, struct mly_event *me);
88 static void mly_periodic(void *data);
89
90 static int mly_immediate_command(struct mly_command *mc);
91 static int mly_start(struct mly_command *mc);
92 static void mly_done(struct mly_softc *sc);
93 static void mly_complete(struct mly_softc *sc);
94 static void mly_complete_handler(void *context, int pending);
95
96 static int mly_alloc_command(struct mly_softc *sc, struct mly_command **mcp);
97 static void mly_release_command(struct mly_command *mc);
98 static void mly_alloc_commands_map(void *arg, bus_dma_segment_t *segs, int nseg, int error);
99 static int mly_alloc_commands(struct mly_softc *sc);
100 static void mly_release_commands(struct mly_softc *sc);
101 static void mly_map_command(struct mly_command *mc);
102 static void mly_unmap_command(struct mly_command *mc);
103
104 static int mly_cam_attach(struct mly_softc *sc);
105 static void mly_cam_detach(struct mly_softc *sc);
106 static void mly_cam_rescan_btl(struct mly_softc *sc, int bus, int target);
107 static void mly_cam_action(struct cam_sim *sim, union ccb *ccb);
108 static int mly_cam_action_io(struct cam_sim *sim, struct ccb_scsiio *csio);
109 static void mly_cam_poll(struct cam_sim *sim);
110 static void mly_cam_complete(struct mly_command *mc);
111 static struct cam_periph *mly_find_periph(struct mly_softc *sc, int bus, int target);
112 static int mly_name_device(struct mly_softc *sc, int bus, int target);
113
114 static int mly_fwhandshake(struct mly_softc *sc);
115
116 static void mly_describe_controller(struct mly_softc *sc);
117 #ifdef MLY_DEBUG
118 static void mly_printstate(struct mly_softc *sc);
119 static void mly_print_command(struct mly_command *mc);
120 static void mly_print_packet(struct mly_command *mc);
121 static void mly_panic(struct mly_softc *sc, char *reason);
122 static void mly_timeout(void *arg);
123 #endif
124 void mly_print_controller(int controller);
125
126
127 static d_open_t mly_user_open;
128 static d_close_t mly_user_close;
129 static d_ioctl_t mly_user_ioctl;
130 static int mly_user_command(struct mly_softc *sc, struct mly_user_command *uc);
131 static int mly_user_health(struct mly_softc *sc, struct mly_user_health *uh);
132
133 #define MLY_CMD_TIMEOUT 20
134
135 static device_method_t mly_methods[] = {
136 /* Device interface */
137 DEVMETHOD(device_probe, mly_probe),
138 DEVMETHOD(device_attach, mly_attach),
139 DEVMETHOD(device_detach, mly_detach),
140 DEVMETHOD(device_shutdown, mly_shutdown),
141 { 0, 0 }
142 };
143
144 static driver_t mly_pci_driver = {
145 "mly",
146 mly_methods,
147 sizeof(struct mly_softc)
148 };
149
150 static devclass_t mly_devclass;
151 DRIVER_MODULE(mly, pci, mly_pci_driver, mly_devclass, 0, 0);
152 MODULE_DEPEND(mly, pci, 1, 1, 1);
153 MODULE_DEPEND(mly, cam, 1, 1, 1);
154
155 static struct cdevsw mly_cdevsw = {
156 .d_version = D_VERSION,
157 .d_open = mly_user_open,
158 .d_close = mly_user_close,
159 .d_ioctl = mly_user_ioctl,
160 .d_name = "mly",
161 };
162
163 /********************************************************************************
164 ********************************************************************************
165 Device Interface
166 ********************************************************************************
167 ********************************************************************************/
168
169 static struct mly_ident
170 {
171 u_int16_t vendor;
172 u_int16_t device;
173 u_int16_t subvendor;
174 u_int16_t subdevice;
175 int hwif;
176 char *desc;
177 } mly_identifiers[] = {
178 {0x1069, 0xba56, 0x1069, 0x0040, MLY_HWIF_STRONGARM, "Mylex eXtremeRAID 2000"},
179 {0x1069, 0xba56, 0x1069, 0x0030, MLY_HWIF_STRONGARM, "Mylex eXtremeRAID 3000"},
180 {0x1069, 0x0050, 0x1069, 0x0050, MLY_HWIF_I960RX, "Mylex AcceleRAID 352"},
181 {0x1069, 0x0050, 0x1069, 0x0052, MLY_HWIF_I960RX, "Mylex AcceleRAID 170"},
182 {0x1069, 0x0050, 0x1069, 0x0054, MLY_HWIF_I960RX, "Mylex AcceleRAID 160"},
183 {0, 0, 0, 0, 0, 0}
184 };
185
186 /********************************************************************************
187 * Compare the provided PCI device with the list we support.
188 */
189 static int
mly_probe(device_t dev)190 mly_probe(device_t dev)
191 {
192 struct mly_ident *m;
193
194 debug_called(1);
195
196 for (m = mly_identifiers; m->vendor != 0; m++) {
197 if ((m->vendor == pci_get_vendor(dev)) &&
198 (m->device == pci_get_device(dev)) &&
199 ((m->subvendor == 0) || ((m->subvendor == pci_get_subvendor(dev)) &&
200 (m->subdevice == pci_get_subdevice(dev))))) {
201
202 device_set_desc(dev, m->desc);
203 return(BUS_PROBE_DEFAULT); /* allow room to be overridden */
204 }
205 }
206 return(ENXIO);
207 }
208
209 /********************************************************************************
210 * Initialise the controller and softc
211 */
212 static int
mly_attach(device_t dev)213 mly_attach(device_t dev)
214 {
215 struct mly_softc *sc = device_get_softc(dev);
216 int error;
217
218 debug_called(1);
219
220 sc->mly_dev = dev;
221 mtx_init(&sc->mly_lock, "mly", NULL, MTX_DEF);
222 callout_init_mtx(&sc->mly_periodic, &sc->mly_lock, 0);
223
224 #ifdef MLY_DEBUG
225 callout_init_mtx(&sc->mly_timeout, &sc->mly_lock, 0);
226 if (device_get_unit(sc->mly_dev) == 0)
227 mly_softc0 = sc;
228 #endif
229
230 /*
231 * Do PCI-specific initialisation.
232 */
233 if ((error = mly_pci_attach(sc)) != 0)
234 goto out;
235
236 /*
237 * Initialise per-controller queues.
238 */
239 mly_initq_free(sc);
240 mly_initq_busy(sc);
241 mly_initq_complete(sc);
242
243 /*
244 * Initialise command-completion task.
245 */
246 TASK_INIT(&sc->mly_task_complete, 0, mly_complete_handler, sc);
247
248 /* disable interrupts before we start talking to the controller */
249 MLY_MASK_INTERRUPTS(sc);
250
251 /*
252 * Wait for the controller to come ready, handshake with the firmware if required.
253 * This is typically only necessary on platforms where the controller BIOS does not
254 * run.
255 */
256 if ((error = mly_fwhandshake(sc)))
257 goto out;
258
259 /*
260 * Allocate initial command buffers.
261 */
262 if ((error = mly_alloc_commands(sc)))
263 goto out;
264
265 /*
266 * Obtain controller feature information
267 */
268 MLY_LOCK(sc);
269 error = mly_get_controllerinfo(sc);
270 MLY_UNLOCK(sc);
271 if (error)
272 goto out;
273
274 /*
275 * Reallocate command buffers now we know how many we want.
276 */
277 mly_release_commands(sc);
278 if ((error = mly_alloc_commands(sc)))
279 goto out;
280
281 /*
282 * Get the current event counter for health purposes, populate the initial
283 * health status buffer.
284 */
285 MLY_LOCK(sc);
286 error = mly_get_eventstatus(sc);
287
288 /*
289 * Enable memory-mailbox mode.
290 */
291 if (error == 0)
292 error = mly_enable_mmbox(sc);
293 MLY_UNLOCK(sc);
294 if (error)
295 goto out;
296
297 /*
298 * Attach to CAM.
299 */
300 if ((error = mly_cam_attach(sc)))
301 goto out;
302
303 /*
304 * Print a little information about the controller
305 */
306 mly_describe_controller(sc);
307
308 /*
309 * Mark all attached devices for rescan.
310 */
311 MLY_LOCK(sc);
312 mly_scan_devices(sc);
313
314 /*
315 * Instigate the first status poll immediately. Rescan completions won't
316 * happen until interrupts are enabled, which should still be before
317 * the SCSI subsystem gets to us, courtesy of the "SCSI settling delay".
318 */
319 mly_periodic((void *)sc);
320 MLY_UNLOCK(sc);
321
322 /*
323 * Create the control device.
324 */
325 sc->mly_dev_t = make_dev(&mly_cdevsw, 0, UID_ROOT, GID_OPERATOR,
326 S_IRUSR | S_IWUSR, "mly%d", device_get_unit(sc->mly_dev));
327 sc->mly_dev_t->si_drv1 = sc;
328
329 /* enable interrupts now */
330 MLY_UNMASK_INTERRUPTS(sc);
331
332 #ifdef MLY_DEBUG
333 callout_reset(&sc->mly_timeout, MLY_CMD_TIMEOUT * hz, mly_timeout, sc);
334 #endif
335
336 out:
337 if (error != 0)
338 mly_free(sc);
339 else
340 gone_in_dev(dev, 14, "mly(4) removed");
341 return(error);
342 }
343
344 /********************************************************************************
345 * Perform PCI-specific initialisation.
346 */
347 static int
mly_pci_attach(struct mly_softc * sc)348 mly_pci_attach(struct mly_softc *sc)
349 {
350 int i, error;
351
352 debug_called(1);
353
354 /* assume failure is 'not configured' */
355 error = ENXIO;
356
357 /*
358 * Verify that the adapter is correctly set up in PCI space.
359 */
360 pci_enable_busmaster(sc->mly_dev);
361
362 /*
363 * Allocate the PCI register window.
364 */
365 sc->mly_regs_rid = PCIR_BAR(0); /* first base address register */
366 if ((sc->mly_regs_resource = bus_alloc_resource_any(sc->mly_dev,
367 SYS_RES_MEMORY, &sc->mly_regs_rid, RF_ACTIVE)) == NULL) {
368 mly_printf(sc, "can't allocate register window\n");
369 goto fail;
370 }
371
372 /*
373 * Allocate and connect our interrupt.
374 */
375 sc->mly_irq_rid = 0;
376 if ((sc->mly_irq = bus_alloc_resource_any(sc->mly_dev, SYS_RES_IRQ,
377 &sc->mly_irq_rid, RF_SHAREABLE | RF_ACTIVE)) == NULL) {
378 mly_printf(sc, "can't allocate interrupt\n");
379 goto fail;
380 }
381 if (bus_setup_intr(sc->mly_dev, sc->mly_irq, INTR_TYPE_CAM | INTR_ENTROPY | INTR_MPSAFE, NULL, mly_intr, sc, &sc->mly_intr)) {
382 mly_printf(sc, "can't set up interrupt\n");
383 goto fail;
384 }
385
386 /* assume failure is 'out of memory' */
387 error = ENOMEM;
388
389 /*
390 * Allocate the parent bus DMA tag appropriate for our PCI interface.
391 *
392 * Note that all of these controllers are 64-bit capable.
393 */
394 if (bus_dma_tag_create(bus_get_dma_tag(sc->mly_dev),/* PCI parent */
395 1, 0, /* alignment, boundary */
396 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
397 BUS_SPACE_MAXADDR, /* highaddr */
398 NULL, NULL, /* filter, filterarg */
399 BUS_SPACE_MAXSIZE_32BIT, /* maxsize */
400 BUS_SPACE_UNRESTRICTED, /* nsegments */
401 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
402 BUS_DMA_ALLOCNOW, /* flags */
403 NULL, /* lockfunc */
404 NULL, /* lockarg */
405 &sc->mly_parent_dmat)) {
406 mly_printf(sc, "can't allocate parent DMA tag\n");
407 goto fail;
408 }
409
410 /*
411 * Create DMA tag for mapping buffers into controller-addressable space.
412 */
413 if (bus_dma_tag_create(sc->mly_parent_dmat, /* parent */
414 1, 0, /* alignment, boundary */
415 BUS_SPACE_MAXADDR, /* lowaddr */
416 BUS_SPACE_MAXADDR, /* highaddr */
417 NULL, NULL, /* filter, filterarg */
418 DFLTPHYS, /* maxsize */
419 MLY_MAX_SGENTRIES, /* nsegments */
420 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
421 0, /* flags */
422 busdma_lock_mutex, /* lockfunc */
423 &sc->mly_lock, /* lockarg */
424 &sc->mly_buffer_dmat)) {
425 mly_printf(sc, "can't allocate buffer DMA tag\n");
426 goto fail;
427 }
428
429 /*
430 * Initialise the DMA tag for command packets.
431 */
432 if (bus_dma_tag_create(sc->mly_parent_dmat, /* parent */
433 1, 0, /* alignment, boundary */
434 BUS_SPACE_MAXADDR, /* lowaddr */
435 BUS_SPACE_MAXADDR, /* highaddr */
436 NULL, NULL, /* filter, filterarg */
437 sizeof(union mly_command_packet) * MLY_MAX_COMMANDS, 1, /* maxsize, nsegments */
438 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
439 BUS_DMA_ALLOCNOW, /* flags */
440 NULL, NULL, /* lockfunc, lockarg */
441 &sc->mly_packet_dmat)) {
442 mly_printf(sc, "can't allocate command packet DMA tag\n");
443 goto fail;
444 }
445
446 /*
447 * Detect the hardware interface version
448 */
449 for (i = 0; mly_identifiers[i].vendor != 0; i++) {
450 if ((mly_identifiers[i].vendor == pci_get_vendor(sc->mly_dev)) &&
451 (mly_identifiers[i].device == pci_get_device(sc->mly_dev))) {
452 sc->mly_hwif = mly_identifiers[i].hwif;
453 switch(sc->mly_hwif) {
454 case MLY_HWIF_I960RX:
455 debug(1, "set hardware up for i960RX");
456 sc->mly_doorbell_true = 0x00;
457 sc->mly_command_mailbox = MLY_I960RX_COMMAND_MAILBOX;
458 sc->mly_status_mailbox = MLY_I960RX_STATUS_MAILBOX;
459 sc->mly_idbr = MLY_I960RX_IDBR;
460 sc->mly_odbr = MLY_I960RX_ODBR;
461 sc->mly_error_status = MLY_I960RX_ERROR_STATUS;
462 sc->mly_interrupt_status = MLY_I960RX_INTERRUPT_STATUS;
463 sc->mly_interrupt_mask = MLY_I960RX_INTERRUPT_MASK;
464 break;
465 case MLY_HWIF_STRONGARM:
466 debug(1, "set hardware up for StrongARM");
467 sc->mly_doorbell_true = 0xff; /* doorbell 'true' is 0 */
468 sc->mly_command_mailbox = MLY_STRONGARM_COMMAND_MAILBOX;
469 sc->mly_status_mailbox = MLY_STRONGARM_STATUS_MAILBOX;
470 sc->mly_idbr = MLY_STRONGARM_IDBR;
471 sc->mly_odbr = MLY_STRONGARM_ODBR;
472 sc->mly_error_status = MLY_STRONGARM_ERROR_STATUS;
473 sc->mly_interrupt_status = MLY_STRONGARM_INTERRUPT_STATUS;
474 sc->mly_interrupt_mask = MLY_STRONGARM_INTERRUPT_MASK;
475 break;
476 }
477 break;
478 }
479 }
480
481 /*
482 * Create the scatter/gather mappings.
483 */
484 if ((error = mly_sg_map(sc)))
485 goto fail;
486
487 /*
488 * Allocate and map the memory mailbox
489 */
490 if ((error = mly_mmbox_map(sc)))
491 goto fail;
492
493 error = 0;
494
495 fail:
496 return(error);
497 }
498
499 /********************************************************************************
500 * Shut the controller down and detach all our resources.
501 */
502 static int
mly_detach(device_t dev)503 mly_detach(device_t dev)
504 {
505 int error;
506
507 if ((error = mly_shutdown(dev)) != 0)
508 return(error);
509
510 mly_free(device_get_softc(dev));
511 return(0);
512 }
513
514 /********************************************************************************
515 * Bring the controller to a state where it can be safely left alone.
516 *
517 * Note that it should not be necessary to wait for any outstanding commands,
518 * as they should be completed prior to calling here.
519 *
520 * XXX this applies for I/O, but not status polls; we should beware of
521 * the case where a status command is running while we detach.
522 */
523 static int
mly_shutdown(device_t dev)524 mly_shutdown(device_t dev)
525 {
526 struct mly_softc *sc = device_get_softc(dev);
527
528 debug_called(1);
529
530 MLY_LOCK(sc);
531 if (sc->mly_state & MLY_STATE_OPEN) {
532 MLY_UNLOCK(sc);
533 return(EBUSY);
534 }
535
536 /* kill the periodic event */
537 callout_stop(&sc->mly_periodic);
538 #ifdef MLY_DEBUG
539 callout_stop(&sc->mly_timeout);
540 #endif
541
542 /* flush controller */
543 mly_printf(sc, "flushing cache...");
544 printf("%s\n", mly_flush(sc) ? "failed" : "done");
545
546 MLY_MASK_INTERRUPTS(sc);
547 MLY_UNLOCK(sc);
548
549 return(0);
550 }
551
552 /*******************************************************************************
553 * Take an interrupt, or be poked by other code to look for interrupt-worthy
554 * status.
555 */
556 static void
mly_intr(void * arg)557 mly_intr(void *arg)
558 {
559 struct mly_softc *sc = (struct mly_softc *)arg;
560
561 debug_called(2);
562
563 MLY_LOCK(sc);
564 mly_done(sc);
565 MLY_UNLOCK(sc);
566 };
567
568 /********************************************************************************
569 ********************************************************************************
570 Bus-dependant Resource Management
571 ********************************************************************************
572 ********************************************************************************/
573
574 /********************************************************************************
575 * Allocate memory for the scatter/gather tables
576 */
577 static int
mly_sg_map(struct mly_softc * sc)578 mly_sg_map(struct mly_softc *sc)
579 {
580 size_t segsize;
581
582 debug_called(1);
583
584 /*
585 * Create a single tag describing a region large enough to hold all of
586 * the s/g lists we will need.
587 */
588 segsize = sizeof(struct mly_sg_entry) * MLY_MAX_COMMANDS *MLY_MAX_SGENTRIES;
589 if (bus_dma_tag_create(sc->mly_parent_dmat, /* parent */
590 1, 0, /* alignment,boundary */
591 BUS_SPACE_MAXADDR, /* lowaddr */
592 BUS_SPACE_MAXADDR, /* highaddr */
593 NULL, NULL, /* filter, filterarg */
594 segsize, 1, /* maxsize, nsegments */
595 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
596 BUS_DMA_ALLOCNOW, /* flags */
597 NULL, NULL, /* lockfunc, lockarg */
598 &sc->mly_sg_dmat)) {
599 mly_printf(sc, "can't allocate scatter/gather DMA tag\n");
600 return(ENOMEM);
601 }
602
603 /*
604 * Allocate enough s/g maps for all commands and permanently map them into
605 * controller-visible space.
606 *
607 * XXX this assumes we can get enough space for all the s/g maps in one
608 * contiguous slab.
609 */
610 if (bus_dmamem_alloc(sc->mly_sg_dmat, (void **)&sc->mly_sg_table,
611 BUS_DMA_NOWAIT, &sc->mly_sg_dmamap)) {
612 mly_printf(sc, "can't allocate s/g table\n");
613 return(ENOMEM);
614 }
615 if (bus_dmamap_load(sc->mly_sg_dmat, sc->mly_sg_dmamap, sc->mly_sg_table,
616 segsize, mly_sg_map_helper, sc, BUS_DMA_NOWAIT) != 0)
617 return (ENOMEM);
618 return(0);
619 }
620
621 /********************************************************************************
622 * Save the physical address of the base of the s/g table.
623 */
624 static void
mly_sg_map_helper(void * arg,bus_dma_segment_t * segs,int nseg,int error)625 mly_sg_map_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error)
626 {
627 struct mly_softc *sc = (struct mly_softc *)arg;
628
629 debug_called(1);
630
631 /* save base of s/g table's address in bus space */
632 sc->mly_sg_busaddr = segs->ds_addr;
633 }
634
635 /********************************************************************************
636 * Allocate memory for the memory-mailbox interface
637 */
638 static int
mly_mmbox_map(struct mly_softc * sc)639 mly_mmbox_map(struct mly_softc *sc)
640 {
641
642 /*
643 * Create a DMA tag for a single contiguous region large enough for the
644 * memory mailbox structure.
645 */
646 if (bus_dma_tag_create(sc->mly_parent_dmat, /* parent */
647 1, 0, /* alignment,boundary */
648 BUS_SPACE_MAXADDR, /* lowaddr */
649 BUS_SPACE_MAXADDR, /* highaddr */
650 NULL, NULL, /* filter, filterarg */
651 sizeof(struct mly_mmbox), 1, /* maxsize, nsegments */
652 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
653 BUS_DMA_ALLOCNOW, /* flags */
654 NULL, NULL, /* lockfunc, lockarg */
655 &sc->mly_mmbox_dmat)) {
656 mly_printf(sc, "can't allocate memory mailbox DMA tag\n");
657 return(ENOMEM);
658 }
659
660 /*
661 * Allocate the buffer
662 */
663 if (bus_dmamem_alloc(sc->mly_mmbox_dmat, (void **)&sc->mly_mmbox, BUS_DMA_NOWAIT, &sc->mly_mmbox_dmamap)) {
664 mly_printf(sc, "can't allocate memory mailbox\n");
665 return(ENOMEM);
666 }
667 if (bus_dmamap_load(sc->mly_mmbox_dmat, sc->mly_mmbox_dmamap, sc->mly_mmbox,
668 sizeof(struct mly_mmbox), mly_mmbox_map_helper, sc,
669 BUS_DMA_NOWAIT) != 0)
670 return (ENOMEM);
671 bzero(sc->mly_mmbox, sizeof(*sc->mly_mmbox));
672 return(0);
673
674 }
675
676 /********************************************************************************
677 * Save the physical address of the memory mailbox
678 */
679 static void
mly_mmbox_map_helper(void * arg,bus_dma_segment_t * segs,int nseg,int error)680 mly_mmbox_map_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error)
681 {
682 struct mly_softc *sc = (struct mly_softc *)arg;
683
684 debug_called(1);
685
686 sc->mly_mmbox_busaddr = segs->ds_addr;
687 }
688
689 /********************************************************************************
690 * Free all of the resources associated with (sc)
691 *
692 * Should not be called if the controller is active.
693 */
694 static void
mly_free(struct mly_softc * sc)695 mly_free(struct mly_softc *sc)
696 {
697
698 debug_called(1);
699
700 /* Remove the management device */
701 destroy_dev(sc->mly_dev_t);
702
703 if (sc->mly_intr)
704 bus_teardown_intr(sc->mly_dev, sc->mly_irq, sc->mly_intr);
705 callout_drain(&sc->mly_periodic);
706 #ifdef MLY_DEBUG
707 callout_drain(&sc->mly_timeout);
708 #endif
709
710 /* detach from CAM */
711 mly_cam_detach(sc);
712
713 /* release command memory */
714 mly_release_commands(sc);
715
716 /* throw away the controllerinfo structure */
717 if (sc->mly_controllerinfo != NULL)
718 free(sc->mly_controllerinfo, M_DEVBUF);
719
720 /* throw away the controllerparam structure */
721 if (sc->mly_controllerparam != NULL)
722 free(sc->mly_controllerparam, M_DEVBUF);
723
724 /* destroy data-transfer DMA tag */
725 if (sc->mly_buffer_dmat)
726 bus_dma_tag_destroy(sc->mly_buffer_dmat);
727
728 /* free and destroy DMA memory and tag for s/g lists */
729 if (sc->mly_sg_table) {
730 bus_dmamap_unload(sc->mly_sg_dmat, sc->mly_sg_dmamap);
731 bus_dmamem_free(sc->mly_sg_dmat, sc->mly_sg_table, sc->mly_sg_dmamap);
732 }
733 if (sc->mly_sg_dmat)
734 bus_dma_tag_destroy(sc->mly_sg_dmat);
735
736 /* free and destroy DMA memory and tag for memory mailbox */
737 if (sc->mly_mmbox) {
738 bus_dmamap_unload(sc->mly_mmbox_dmat, sc->mly_mmbox_dmamap);
739 bus_dmamem_free(sc->mly_mmbox_dmat, sc->mly_mmbox, sc->mly_mmbox_dmamap);
740 }
741 if (sc->mly_mmbox_dmat)
742 bus_dma_tag_destroy(sc->mly_mmbox_dmat);
743
744 /* disconnect the interrupt handler */
745 if (sc->mly_irq != NULL)
746 bus_release_resource(sc->mly_dev, SYS_RES_IRQ, sc->mly_irq_rid, sc->mly_irq);
747
748 /* destroy the parent DMA tag */
749 if (sc->mly_parent_dmat)
750 bus_dma_tag_destroy(sc->mly_parent_dmat);
751
752 /* release the register window mapping */
753 if (sc->mly_regs_resource != NULL)
754 bus_release_resource(sc->mly_dev, SYS_RES_MEMORY, sc->mly_regs_rid, sc->mly_regs_resource);
755
756 mtx_destroy(&sc->mly_lock);
757 }
758
759 /********************************************************************************
760 ********************************************************************************
761 Command Wrappers
762 ********************************************************************************
763 ********************************************************************************/
764
765 /********************************************************************************
766 * Fill in the mly_controllerinfo and mly_controllerparam fields in the softc.
767 */
768 static int
mly_get_controllerinfo(struct mly_softc * sc)769 mly_get_controllerinfo(struct mly_softc *sc)
770 {
771 struct mly_command_ioctl mci;
772 u_int8_t status;
773 int error;
774
775 debug_called(1);
776
777 if (sc->mly_controllerinfo != NULL)
778 free(sc->mly_controllerinfo, M_DEVBUF);
779
780 /* build the getcontrollerinfo ioctl and send it */
781 bzero(&mci, sizeof(mci));
782 sc->mly_controllerinfo = NULL;
783 mci.sub_ioctl = MDACIOCTL_GETCONTROLLERINFO;
784 if ((error = mly_ioctl(sc, &mci, (void **)&sc->mly_controllerinfo, sizeof(*sc->mly_controllerinfo),
785 &status, NULL, NULL)))
786 return(error);
787 if (status != 0)
788 return(EIO);
789
790 if (sc->mly_controllerparam != NULL)
791 free(sc->mly_controllerparam, M_DEVBUF);
792
793 /* build the getcontrollerparameter ioctl and send it */
794 bzero(&mci, sizeof(mci));
795 sc->mly_controllerparam = NULL;
796 mci.sub_ioctl = MDACIOCTL_GETCONTROLLERPARAMETER;
797 if ((error = mly_ioctl(sc, &mci, (void **)&sc->mly_controllerparam, sizeof(*sc->mly_controllerparam),
798 &status, NULL, NULL)))
799 return(error);
800 if (status != 0)
801 return(EIO);
802
803 return(0);
804 }
805
806 /********************************************************************************
807 * Schedule all possible devices for a rescan.
808 *
809 */
810 static void
mly_scan_devices(struct mly_softc * sc)811 mly_scan_devices(struct mly_softc *sc)
812 {
813 int bus, target;
814
815 debug_called(1);
816
817 /*
818 * Clear any previous BTL information.
819 */
820 bzero(&sc->mly_btl, sizeof(sc->mly_btl));
821
822 /*
823 * Mark all devices as requiring a rescan, and let the next
824 * periodic scan collect them.
825 */
826 for (bus = 0; bus < sc->mly_cam_channels; bus++)
827 if (MLY_BUS_IS_VALID(sc, bus))
828 for (target = 0; target < MLY_MAX_TARGETS; target++)
829 sc->mly_btl[bus][target].mb_flags = MLY_BTL_RESCAN;
830
831 }
832
833 /********************************************************************************
834 * Rescan a device, possibly as a consequence of getting an event which suggests
835 * that it may have changed.
836 *
837 * If we suffer resource starvation, we can abandon the rescan as we'll be
838 * retried.
839 */
840 static void
mly_rescan_btl(struct mly_softc * sc,int bus,int target)841 mly_rescan_btl(struct mly_softc *sc, int bus, int target)
842 {
843 struct mly_command *mc;
844 struct mly_command_ioctl *mci;
845
846 debug_called(1);
847
848 /* check that this bus is valid */
849 if (!MLY_BUS_IS_VALID(sc, bus))
850 return;
851
852 /* get a command */
853 if (mly_alloc_command(sc, &mc))
854 return;
855
856 /* set up the data buffer */
857 if ((mc->mc_data = malloc(sizeof(union mly_devinfo), M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL) {
858 mly_release_command(mc);
859 return;
860 }
861 mc->mc_flags |= MLY_CMD_DATAIN;
862 mc->mc_complete = mly_complete_rescan;
863
864 /*
865 * Build the ioctl.
866 */
867 mci = (struct mly_command_ioctl *)&mc->mc_packet->ioctl;
868 mci->opcode = MDACMD_IOCTL;
869 mci->addr.phys.controller = 0;
870 mci->timeout.value = 30;
871 mci->timeout.scale = MLY_TIMEOUT_SECONDS;
872 if (MLY_BUS_IS_VIRTUAL(sc, bus)) {
873 mc->mc_length = mci->data_size = sizeof(struct mly_ioctl_getlogdevinfovalid);
874 mci->sub_ioctl = MDACIOCTL_GETLOGDEVINFOVALID;
875 mci->addr.log.logdev = MLY_LOGDEV_ID(sc, bus, target);
876 debug(1, "logical device %d", mci->addr.log.logdev);
877 } else {
878 mc->mc_length = mci->data_size = sizeof(struct mly_ioctl_getphysdevinfovalid);
879 mci->sub_ioctl = MDACIOCTL_GETPHYSDEVINFOVALID;
880 mci->addr.phys.lun = 0;
881 mci->addr.phys.target = target;
882 mci->addr.phys.channel = bus;
883 debug(1, "physical device %d:%d", mci->addr.phys.channel, mci->addr.phys.target);
884 }
885
886 /*
887 * Dispatch the command. If we successfully send the command, clear the rescan
888 * bit.
889 */
890 if (mly_start(mc) != 0) {
891 mly_release_command(mc);
892 } else {
893 sc->mly_btl[bus][target].mb_flags &= ~MLY_BTL_RESCAN; /* success */
894 }
895 }
896
897 /********************************************************************************
898 * Handle the completion of a rescan operation
899 */
900 static void
mly_complete_rescan(struct mly_command * mc)901 mly_complete_rescan(struct mly_command *mc)
902 {
903 struct mly_softc *sc = mc->mc_sc;
904 struct mly_ioctl_getlogdevinfovalid *ldi;
905 struct mly_ioctl_getphysdevinfovalid *pdi;
906 struct mly_command_ioctl *mci;
907 struct mly_btl btl, *btlp;
908 int bus, target, rescan;
909
910 debug_called(1);
911
912 /*
913 * Recover the bus and target from the command. We need these even in
914 * the case where we don't have a useful response.
915 */
916 mci = (struct mly_command_ioctl *)&mc->mc_packet->ioctl;
917 if (mci->sub_ioctl == MDACIOCTL_GETLOGDEVINFOVALID) {
918 bus = MLY_LOGDEV_BUS(sc, mci->addr.log.logdev);
919 target = MLY_LOGDEV_TARGET(sc, mci->addr.log.logdev);
920 } else {
921 bus = mci->addr.phys.channel;
922 target = mci->addr.phys.target;
923 }
924 /* XXX validate bus/target? */
925
926 /* the default result is 'no device' */
927 bzero(&btl, sizeof(btl));
928
929 /* if the rescan completed OK, we have possibly-new BTL data */
930 if (mc->mc_status == 0) {
931 if (mc->mc_length == sizeof(*ldi)) {
932 ldi = (struct mly_ioctl_getlogdevinfovalid *)mc->mc_data;
933 if ((MLY_LOGDEV_BUS(sc, ldi->logical_device_number) != bus) ||
934 (MLY_LOGDEV_TARGET(sc, ldi->logical_device_number) != target)) {
935 mly_printf(sc, "WARNING: BTL rescan for %d:%d returned data for %d:%d instead\n",
936 bus, target, MLY_LOGDEV_BUS(sc, ldi->logical_device_number),
937 MLY_LOGDEV_TARGET(sc, ldi->logical_device_number));
938 /* XXX what can we do about this? */
939 }
940 btl.mb_flags = MLY_BTL_LOGICAL;
941 btl.mb_type = ldi->raid_level;
942 btl.mb_state = ldi->state;
943 debug(1, "BTL rescan for %d returns %s, %s", ldi->logical_device_number,
944 mly_describe_code(mly_table_device_type, ldi->raid_level),
945 mly_describe_code(mly_table_device_state, ldi->state));
946 } else if (mc->mc_length == sizeof(*pdi)) {
947 pdi = (struct mly_ioctl_getphysdevinfovalid *)mc->mc_data;
948 if ((pdi->channel != bus) || (pdi->target != target)) {
949 mly_printf(sc, "WARNING: BTL rescan for %d:%d returned data for %d:%d instead\n",
950 bus, target, pdi->channel, pdi->target);
951 /* XXX what can we do about this? */
952 }
953 btl.mb_flags = MLY_BTL_PHYSICAL;
954 btl.mb_type = MLY_DEVICE_TYPE_PHYSICAL;
955 btl.mb_state = pdi->state;
956 btl.mb_speed = pdi->speed;
957 btl.mb_width = pdi->width;
958 if (pdi->state != MLY_DEVICE_STATE_UNCONFIGURED)
959 sc->mly_btl[bus][target].mb_flags |= MLY_BTL_PROTECTED;
960 debug(1, "BTL rescan for %d:%d returns %s", bus, target,
961 mly_describe_code(mly_table_device_state, pdi->state));
962 } else {
963 mly_printf(sc, "BTL rescan result invalid\n");
964 }
965 }
966
967 free(mc->mc_data, M_DEVBUF);
968 mly_release_command(mc);
969
970 /*
971 * Decide whether we need to rescan the device.
972 */
973 rescan = 0;
974
975 /* device type changes (usually between 'nothing' and 'something') */
976 btlp = &sc->mly_btl[bus][target];
977 if (btl.mb_flags != btlp->mb_flags) {
978 debug(1, "flags changed, rescanning");
979 rescan = 1;
980 }
981
982 /* XXX other reasons? */
983
984 /*
985 * Update BTL information.
986 */
987 *btlp = btl;
988
989 /*
990 * Perform CAM rescan if required.
991 */
992 if (rescan)
993 mly_cam_rescan_btl(sc, bus, target);
994 }
995
996 /********************************************************************************
997 * Get the current health status and set the 'next event' counter to suit.
998 */
999 static int
mly_get_eventstatus(struct mly_softc * sc)1000 mly_get_eventstatus(struct mly_softc *sc)
1001 {
1002 struct mly_command_ioctl mci;
1003 struct mly_health_status *mh;
1004 u_int8_t status;
1005 int error;
1006
1007 /* build the gethealthstatus ioctl and send it */
1008 bzero(&mci, sizeof(mci));
1009 mh = NULL;
1010 mci.sub_ioctl = MDACIOCTL_GETHEALTHSTATUS;
1011
1012 if ((error = mly_ioctl(sc, &mci, (void **)&mh, sizeof(*mh), &status, NULL, NULL)))
1013 return(error);
1014 if (status != 0)
1015 return(EIO);
1016
1017 /* get the event counter */
1018 sc->mly_event_change = mh->change_counter;
1019 sc->mly_event_waiting = mh->next_event;
1020 sc->mly_event_counter = mh->next_event;
1021
1022 /* save the health status into the memory mailbox */
1023 bcopy(mh, &sc->mly_mmbox->mmm_health.status, sizeof(*mh));
1024
1025 debug(1, "initial change counter %d, event counter %d", mh->change_counter, mh->next_event);
1026
1027 free(mh, M_DEVBUF);
1028 return(0);
1029 }
1030
1031 /********************************************************************************
1032 * Enable the memory mailbox mode.
1033 */
1034 static int
mly_enable_mmbox(struct mly_softc * sc)1035 mly_enable_mmbox(struct mly_softc *sc)
1036 {
1037 struct mly_command_ioctl mci;
1038 u_int8_t *sp, status;
1039 int error;
1040
1041 debug_called(1);
1042
1043 /* build the ioctl and send it */
1044 bzero(&mci, sizeof(mci));
1045 mci.sub_ioctl = MDACIOCTL_SETMEMORYMAILBOX;
1046 /* set buffer addresses */
1047 mci.param.setmemorymailbox.command_mailbox_physaddr =
1048 sc->mly_mmbox_busaddr + offsetof(struct mly_mmbox, mmm_command);
1049 mci.param.setmemorymailbox.status_mailbox_physaddr =
1050 sc->mly_mmbox_busaddr + offsetof(struct mly_mmbox, mmm_status);
1051 mci.param.setmemorymailbox.health_buffer_physaddr =
1052 sc->mly_mmbox_busaddr + offsetof(struct mly_mmbox, mmm_health);
1053
1054 /* set buffer sizes - abuse of data_size field is revolting */
1055 sp = (u_int8_t *)&mci.data_size;
1056 sp[0] = ((sizeof(union mly_command_packet) * MLY_MMBOX_COMMANDS) / 1024);
1057 sp[1] = (sizeof(union mly_status_packet) * MLY_MMBOX_STATUS) / 1024;
1058 mci.param.setmemorymailbox.health_buffer_size = sizeof(union mly_health_region) / 1024;
1059
1060 debug(1, "memory mailbox at %p (0x%llx/%d 0x%llx/%d 0x%llx/%d", sc->mly_mmbox,
1061 mci.param.setmemorymailbox.command_mailbox_physaddr, sp[0],
1062 mci.param.setmemorymailbox.status_mailbox_physaddr, sp[1],
1063 mci.param.setmemorymailbox.health_buffer_physaddr,
1064 mci.param.setmemorymailbox.health_buffer_size);
1065
1066 if ((error = mly_ioctl(sc, &mci, NULL, 0, &status, NULL, NULL)))
1067 return(error);
1068 if (status != 0)
1069 return(EIO);
1070 sc->mly_state |= MLY_STATE_MMBOX_ACTIVE;
1071 debug(1, "memory mailbox active");
1072 return(0);
1073 }
1074
1075 /********************************************************************************
1076 * Flush all pending I/O from the controller.
1077 */
1078 static int
mly_flush(struct mly_softc * sc)1079 mly_flush(struct mly_softc *sc)
1080 {
1081 struct mly_command_ioctl mci;
1082 u_int8_t status;
1083 int error;
1084
1085 debug_called(1);
1086
1087 /* build the ioctl */
1088 bzero(&mci, sizeof(mci));
1089 mci.sub_ioctl = MDACIOCTL_FLUSHDEVICEDATA;
1090 mci.param.deviceoperation.operation_device = MLY_OPDEVICE_PHYSICAL_CONTROLLER;
1091
1092 /* pass it off to the controller */
1093 if ((error = mly_ioctl(sc, &mci, NULL, 0, &status, NULL, NULL)))
1094 return(error);
1095
1096 return((status == 0) ? 0 : EIO);
1097 }
1098
1099 /********************************************************************************
1100 * Perform an ioctl command.
1101 *
1102 * If (data) is not NULL, the command requires data transfer. If (*data) is NULL
1103 * the command requires data transfer from the controller, and we will allocate
1104 * a buffer for it. If (*data) is not NULL, the command requires data transfer
1105 * to the controller.
1106 *
1107 * XXX passing in the whole ioctl structure is ugly. Better ideas?
1108 *
1109 * XXX we don't even try to handle the case where datasize > 4k. We should.
1110 */
1111 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)1112 mly_ioctl(struct mly_softc *sc, struct mly_command_ioctl *ioctl, void **data, size_t datasize,
1113 u_int8_t *status, void *sense_buffer, size_t *sense_length)
1114 {
1115 struct mly_command *mc;
1116 struct mly_command_ioctl *mci;
1117 int error;
1118
1119 debug_called(1);
1120 MLY_ASSERT_LOCKED(sc);
1121
1122 mc = NULL;
1123 if (mly_alloc_command(sc, &mc)) {
1124 error = ENOMEM;
1125 goto out;
1126 }
1127
1128 /* copy the ioctl structure, but save some important fields and then fixup */
1129 mci = &mc->mc_packet->ioctl;
1130 ioctl->sense_buffer_address = mci->sense_buffer_address;
1131 ioctl->maximum_sense_size = mci->maximum_sense_size;
1132 *mci = *ioctl;
1133 mci->opcode = MDACMD_IOCTL;
1134 mci->timeout.value = 30;
1135 mci->timeout.scale = MLY_TIMEOUT_SECONDS;
1136
1137 /* handle the data buffer */
1138 if (data != NULL) {
1139 if (*data == NULL) {
1140 /* allocate data buffer */
1141 if ((mc->mc_data = malloc(datasize, M_DEVBUF, M_NOWAIT)) == NULL) {
1142 error = ENOMEM;
1143 goto out;
1144 }
1145 mc->mc_flags |= MLY_CMD_DATAIN;
1146 } else {
1147 mc->mc_data = *data;
1148 mc->mc_flags |= MLY_CMD_DATAOUT;
1149 }
1150 mc->mc_length = datasize;
1151 mc->mc_packet->generic.data_size = datasize;
1152 }
1153
1154 /* run the command */
1155 if ((error = mly_immediate_command(mc)))
1156 goto out;
1157
1158 /* clean up and return any data */
1159 *status = mc->mc_status;
1160 if ((mc->mc_sense > 0) && (sense_buffer != NULL)) {
1161 bcopy(mc->mc_packet, sense_buffer, mc->mc_sense);
1162 *sense_length = mc->mc_sense;
1163 goto out;
1164 }
1165
1166 /* should we return a data pointer? */
1167 if ((data != NULL) && (*data == NULL))
1168 *data = mc->mc_data;
1169
1170 /* command completed OK */
1171 error = 0;
1172
1173 out:
1174 if (mc != NULL) {
1175 /* do we need to free a data buffer we allocated? */
1176 if (error && (mc->mc_data != NULL) && (*data == NULL))
1177 free(mc->mc_data, M_DEVBUF);
1178 mly_release_command(mc);
1179 }
1180 return(error);
1181 }
1182
1183 /********************************************************************************
1184 * Check for event(s) outstanding in the controller.
1185 */
1186 static void
mly_check_event(struct mly_softc * sc)1187 mly_check_event(struct mly_softc *sc)
1188 {
1189
1190 /*
1191 * The controller may have updated the health status information,
1192 * so check for it here. Note that the counters are all in host memory,
1193 * so this check is very cheap. Also note that we depend on checking on
1194 * completion
1195 */
1196 if (sc->mly_mmbox->mmm_health.status.change_counter != sc->mly_event_change) {
1197 sc->mly_event_change = sc->mly_mmbox->mmm_health.status.change_counter;
1198 debug(1, "event change %d, event status update, %d -> %d", sc->mly_event_change,
1199 sc->mly_event_waiting, sc->mly_mmbox->mmm_health.status.next_event);
1200 sc->mly_event_waiting = sc->mly_mmbox->mmm_health.status.next_event;
1201
1202 /* wake up anyone that might be interested in this */
1203 wakeup(&sc->mly_event_change);
1204 }
1205 if (sc->mly_event_counter != sc->mly_event_waiting)
1206 mly_fetch_event(sc);
1207 }
1208
1209 /********************************************************************************
1210 * Fetch one event from the controller.
1211 *
1212 * If we fail due to resource starvation, we'll be retried the next time a
1213 * command completes.
1214 */
1215 static void
mly_fetch_event(struct mly_softc * sc)1216 mly_fetch_event(struct mly_softc *sc)
1217 {
1218 struct mly_command *mc;
1219 struct mly_command_ioctl *mci;
1220 u_int32_t event;
1221
1222 debug_called(1);
1223
1224 /* get a command */
1225 if (mly_alloc_command(sc, &mc))
1226 return;
1227
1228 /* set up the data buffer */
1229 if ((mc->mc_data = malloc(sizeof(struct mly_event), M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL) {
1230 mly_release_command(mc);
1231 return;
1232 }
1233 mc->mc_length = sizeof(struct mly_event);
1234 mc->mc_flags |= MLY_CMD_DATAIN;
1235 mc->mc_complete = mly_complete_event;
1236
1237 /*
1238 * Get an event number to fetch. It's possible that we've raced with another
1239 * context for the last event, in which case there will be no more events.
1240 */
1241 if (sc->mly_event_counter == sc->mly_event_waiting) {
1242 mly_release_command(mc);
1243 return;
1244 }
1245 event = sc->mly_event_counter++;
1246
1247 /*
1248 * Build the ioctl.
1249 *
1250 * At this point we are committed to sending this request, as it
1251 * will be the only one constructed for this particular event number.
1252 */
1253 mci = (struct mly_command_ioctl *)&mc->mc_packet->ioctl;
1254 mci->opcode = MDACMD_IOCTL;
1255 mci->data_size = sizeof(struct mly_event);
1256 mci->addr.phys.lun = (event >> 16) & 0xff;
1257 mci->addr.phys.target = (event >> 24) & 0xff;
1258 mci->addr.phys.channel = 0;
1259 mci->addr.phys.controller = 0;
1260 mci->timeout.value = 30;
1261 mci->timeout.scale = MLY_TIMEOUT_SECONDS;
1262 mci->sub_ioctl = MDACIOCTL_GETEVENT;
1263 mci->param.getevent.sequence_number_low = event & 0xffff;
1264
1265 debug(1, "fetch event %u", event);
1266
1267 /*
1268 * Submit the command.
1269 *
1270 * Note that failure of mly_start() will result in this event never being
1271 * fetched.
1272 */
1273 if (mly_start(mc) != 0) {
1274 mly_printf(sc, "couldn't fetch event %u\n", event);
1275 mly_release_command(mc);
1276 }
1277 }
1278
1279 /********************************************************************************
1280 * Handle the completion of an event poll.
1281 */
1282 static void
mly_complete_event(struct mly_command * mc)1283 mly_complete_event(struct mly_command *mc)
1284 {
1285 struct mly_softc *sc = mc->mc_sc;
1286 struct mly_event *me = (struct mly_event *)mc->mc_data;
1287
1288 debug_called(1);
1289
1290 /*
1291 * If the event was successfully fetched, process it.
1292 */
1293 if (mc->mc_status == SCSI_STATUS_OK) {
1294 mly_process_event(sc, me);
1295 free(me, M_DEVBUF);
1296 }
1297 mly_release_command(mc);
1298
1299 /*
1300 * Check for another event.
1301 */
1302 mly_check_event(sc);
1303 }
1304
1305 /********************************************************************************
1306 * Process a controller event.
1307 */
1308 static void
mly_process_event(struct mly_softc * sc,struct mly_event * me)1309 mly_process_event(struct mly_softc *sc, struct mly_event *me)
1310 {
1311 struct scsi_sense_data_fixed *ssd;
1312 char *fp, *tp;
1313 int bus, target, event, class, action;
1314
1315 ssd = (struct scsi_sense_data_fixed *)&me->sense[0];
1316
1317 /*
1318 * Errors can be reported using vendor-unique sense data. In this case, the
1319 * event code will be 0x1c (Request sense data present), the sense key will
1320 * be 0x09 (vendor specific), the MSB of the ASC will be set, and the
1321 * actual event code will be a 16-bit value comprised of the ASCQ (low byte)
1322 * and low seven bits of the ASC (low seven bits of the high byte).
1323 */
1324 if ((me->code == 0x1c) &&
1325 ((ssd->flags & SSD_KEY) == SSD_KEY_Vendor_Specific) &&
1326 (ssd->add_sense_code & 0x80)) {
1327 event = ((int)(ssd->add_sense_code & ~0x80) << 8) + ssd->add_sense_code_qual;
1328 } else {
1329 event = me->code;
1330 }
1331
1332 /* look up event, get codes */
1333 fp = mly_describe_code(mly_table_event, event);
1334
1335 debug(1, "Event %d code 0x%x", me->sequence_number, me->code);
1336
1337 /* quiet event? */
1338 class = fp[0];
1339 if (isupper(class) && bootverbose)
1340 class = tolower(class);
1341
1342 /* get action code, text string */
1343 action = fp[1];
1344 tp = &fp[2];
1345
1346 /*
1347 * Print some information about the event.
1348 *
1349 * This code uses a table derived from the corresponding portion of the Linux
1350 * driver, and thus the parser is very similar.
1351 */
1352 switch(class) {
1353 case 'p': /* error on physical device */
1354 mly_printf(sc, "physical device %d:%d %s\n", me->channel, me->target, tp);
1355 if (action == 'r')
1356 sc->mly_btl[me->channel][me->target].mb_flags |= MLY_BTL_RESCAN;
1357 break;
1358 case 'l': /* error on logical unit */
1359 case 'm': /* message about logical unit */
1360 bus = MLY_LOGDEV_BUS(sc, me->lun);
1361 target = MLY_LOGDEV_TARGET(sc, me->lun);
1362 mly_name_device(sc, bus, target);
1363 mly_printf(sc, "logical device %d (%s) %s\n", me->lun, sc->mly_btl[bus][target].mb_name, tp);
1364 if (action == 'r')
1365 sc->mly_btl[bus][target].mb_flags |= MLY_BTL_RESCAN;
1366 break;
1367 case 's': /* report of sense data */
1368 if (((ssd->flags & SSD_KEY) == SSD_KEY_NO_SENSE) ||
1369 (((ssd->flags & SSD_KEY) == SSD_KEY_NOT_READY) &&
1370 (ssd->add_sense_code == 0x04) &&
1371 ((ssd->add_sense_code_qual == 0x01) || (ssd->add_sense_code_qual == 0x02))))
1372 break; /* ignore NO_SENSE or NOT_READY in one case */
1373
1374 mly_printf(sc, "physical device %d:%d %s\n", me->channel, me->target, tp);
1375 mly_printf(sc, " sense key %d asc %02x ascq %02x\n",
1376 ssd->flags & SSD_KEY, ssd->add_sense_code, ssd->add_sense_code_qual);
1377 mly_printf(sc, " info %4D csi %4D\n", ssd->info, "", ssd->cmd_spec_info, "");
1378 if (action == 'r')
1379 sc->mly_btl[me->channel][me->target].mb_flags |= MLY_BTL_RESCAN;
1380 break;
1381 case 'e':
1382 mly_printf(sc, tp, me->target, me->lun);
1383 printf("\n");
1384 break;
1385 case 'c':
1386 mly_printf(sc, "controller %s\n", tp);
1387 break;
1388 case '?':
1389 mly_printf(sc, "%s - %d\n", tp, me->code);
1390 break;
1391 default: /* probably a 'noisy' event being ignored */
1392 break;
1393 }
1394 }
1395
1396 /********************************************************************************
1397 * Perform periodic activities.
1398 */
1399 static void
mly_periodic(void * data)1400 mly_periodic(void *data)
1401 {
1402 struct mly_softc *sc = (struct mly_softc *)data;
1403 int bus, target;
1404
1405 debug_called(2);
1406 MLY_ASSERT_LOCKED(sc);
1407
1408 /*
1409 * Scan devices.
1410 */
1411 for (bus = 0; bus < sc->mly_cam_channels; bus++) {
1412 if (MLY_BUS_IS_VALID(sc, bus)) {
1413 for (target = 0; target < MLY_MAX_TARGETS; target++) {
1414
1415 /* ignore the controller in this scan */
1416 if (target == sc->mly_controllerparam->initiator_id)
1417 continue;
1418
1419 /* perform device rescan? */
1420 if (sc->mly_btl[bus][target].mb_flags & MLY_BTL_RESCAN)
1421 mly_rescan_btl(sc, bus, target);
1422 }
1423 }
1424 }
1425
1426 /* check for controller events */
1427 mly_check_event(sc);
1428
1429 /* reschedule ourselves */
1430 callout_schedule(&sc->mly_periodic, MLY_PERIODIC_INTERVAL * hz);
1431 }
1432
1433 /********************************************************************************
1434 ********************************************************************************
1435 Command Processing
1436 ********************************************************************************
1437 ********************************************************************************/
1438
1439 /********************************************************************************
1440 * Run a command and wait for it to complete.
1441 *
1442 */
1443 static int
mly_immediate_command(struct mly_command * mc)1444 mly_immediate_command(struct mly_command *mc)
1445 {
1446 struct mly_softc *sc = mc->mc_sc;
1447 int error;
1448
1449 debug_called(1);
1450
1451 MLY_ASSERT_LOCKED(sc);
1452 if ((error = mly_start(mc))) {
1453 return(error);
1454 }
1455
1456 if (sc->mly_state & MLY_STATE_INTERRUPTS_ON) {
1457 /* sleep on the command */
1458 while(!(mc->mc_flags & MLY_CMD_COMPLETE)) {
1459 mtx_sleep(mc, &sc->mly_lock, PRIBIO, "mlywait", 0);
1460 }
1461 } else {
1462 /* spin and collect status while we do */
1463 while(!(mc->mc_flags & MLY_CMD_COMPLETE)) {
1464 mly_done(mc->mc_sc);
1465 }
1466 }
1467 return(0);
1468 }
1469
1470 /********************************************************************************
1471 * Deliver a command to the controller.
1472 *
1473 * XXX it would be good to just queue commands that we can't submit immediately
1474 * and send them later, but we probably want a wrapper for that so that
1475 * we don't hang on a failed submission for an immediate command.
1476 */
1477 static int
mly_start(struct mly_command * mc)1478 mly_start(struct mly_command *mc)
1479 {
1480 struct mly_softc *sc = mc->mc_sc;
1481 union mly_command_packet *pkt;
1482
1483 debug_called(2);
1484 MLY_ASSERT_LOCKED(sc);
1485
1486 /*
1487 * Set the command up for delivery to the controller.
1488 */
1489 mly_map_command(mc);
1490 mc->mc_packet->generic.command_id = mc->mc_slot;
1491
1492 #ifdef MLY_DEBUG
1493 mc->mc_timestamp = time_second;
1494 #endif
1495
1496 /*
1497 * Do we have to use the hardware mailbox?
1498 */
1499 if (!(sc->mly_state & MLY_STATE_MMBOX_ACTIVE)) {
1500 /*
1501 * Check to see if the controller is ready for us.
1502 */
1503 if (MLY_IDBR_TRUE(sc, MLY_HM_CMDSENT)) {
1504 return(EBUSY);
1505 }
1506 mc->mc_flags |= MLY_CMD_BUSY;
1507
1508 /*
1509 * It's ready, send the command.
1510 */
1511 MLY_SET_MBOX(sc, sc->mly_command_mailbox, &mc->mc_packetphys);
1512 MLY_SET_REG(sc, sc->mly_idbr, MLY_HM_CMDSENT);
1513
1514 } else { /* use memory-mailbox mode */
1515
1516 pkt = &sc->mly_mmbox->mmm_command[sc->mly_mmbox_command_index];
1517
1518 /* check to see if the next index is free yet */
1519 if (pkt->mmbox.flag != 0) {
1520 return(EBUSY);
1521 }
1522 mc->mc_flags |= MLY_CMD_BUSY;
1523
1524 /* copy in new command */
1525 bcopy(mc->mc_packet->mmbox.data, pkt->mmbox.data, sizeof(pkt->mmbox.data));
1526 /* barrier to ensure completion of previous write before we write the flag */
1527 bus_barrier(sc->mly_regs_resource, 0, 0, BUS_SPACE_BARRIER_WRITE);
1528 /* copy flag last */
1529 pkt->mmbox.flag = mc->mc_packet->mmbox.flag;
1530 /* barrier to ensure completion of previous write before we notify the controller */
1531 bus_barrier(sc->mly_regs_resource, 0, 0, BUS_SPACE_BARRIER_WRITE);
1532
1533 /* signal controller, update index */
1534 MLY_SET_REG(sc, sc->mly_idbr, MLY_AM_CMDSENT);
1535 sc->mly_mmbox_command_index = (sc->mly_mmbox_command_index + 1) % MLY_MMBOX_COMMANDS;
1536 }
1537
1538 mly_enqueue_busy(mc);
1539 return(0);
1540 }
1541
1542 /********************************************************************************
1543 * Pick up command status from the controller, schedule a completion event
1544 */
1545 static void
mly_done(struct mly_softc * sc)1546 mly_done(struct mly_softc *sc)
1547 {
1548 struct mly_command *mc;
1549 union mly_status_packet *sp;
1550 u_int16_t slot;
1551 int worked;
1552
1553 MLY_ASSERT_LOCKED(sc);
1554 worked = 0;
1555
1556 /* pick up hardware-mailbox commands */
1557 if (MLY_ODBR_TRUE(sc, MLY_HM_STSREADY)) {
1558 slot = MLY_GET_REG2(sc, sc->mly_status_mailbox);
1559 if (slot < MLY_SLOT_MAX) {
1560 mc = &sc->mly_command[slot - MLY_SLOT_START];
1561 mc->mc_status = MLY_GET_REG(sc, sc->mly_status_mailbox + 2);
1562 mc->mc_sense = MLY_GET_REG(sc, sc->mly_status_mailbox + 3);
1563 mc->mc_resid = MLY_GET_REG4(sc, sc->mly_status_mailbox + 4);
1564 mly_remove_busy(mc);
1565 mc->mc_flags &= ~MLY_CMD_BUSY;
1566 mly_enqueue_complete(mc);
1567 worked = 1;
1568 } else {
1569 /* slot 0xffff may mean "extremely bogus command" */
1570 mly_printf(sc, "got HM completion for illegal slot %u\n", slot);
1571 }
1572 /* unconditionally acknowledge status */
1573 MLY_SET_REG(sc, sc->mly_odbr, MLY_HM_STSREADY);
1574 MLY_SET_REG(sc, sc->mly_idbr, MLY_HM_STSACK);
1575 }
1576
1577 /* pick up memory-mailbox commands */
1578 if (MLY_ODBR_TRUE(sc, MLY_AM_STSREADY)) {
1579 for (;;) {
1580 sp = &sc->mly_mmbox->mmm_status[sc->mly_mmbox_status_index];
1581
1582 /* check for more status */
1583 if (sp->mmbox.flag == 0)
1584 break;
1585
1586 /* get slot number */
1587 slot = sp->status.command_id;
1588 if (slot < MLY_SLOT_MAX) {
1589 mc = &sc->mly_command[slot - MLY_SLOT_START];
1590 mc->mc_status = sp->status.status;
1591 mc->mc_sense = sp->status.sense_length;
1592 mc->mc_resid = sp->status.residue;
1593 mly_remove_busy(mc);
1594 mc->mc_flags &= ~MLY_CMD_BUSY;
1595 mly_enqueue_complete(mc);
1596 worked = 1;
1597 } else {
1598 /* slot 0xffff may mean "extremely bogus command" */
1599 mly_printf(sc, "got AM completion for illegal slot %u at %d\n",
1600 slot, sc->mly_mmbox_status_index);
1601 }
1602
1603 /* clear and move to next index */
1604 sp->mmbox.flag = 0;
1605 sc->mly_mmbox_status_index = (sc->mly_mmbox_status_index + 1) % MLY_MMBOX_STATUS;
1606 }
1607 /* acknowledge that we have collected status value(s) */
1608 MLY_SET_REG(sc, sc->mly_odbr, MLY_AM_STSREADY);
1609 }
1610
1611 if (worked) {
1612 if (sc->mly_state & MLY_STATE_INTERRUPTS_ON)
1613 taskqueue_enqueue(taskqueue_thread, &sc->mly_task_complete);
1614 else
1615 mly_complete(sc);
1616 }
1617 }
1618
1619 /********************************************************************************
1620 * Process completed commands
1621 */
1622 static void
mly_complete_handler(void * context,int pending)1623 mly_complete_handler(void *context, int pending)
1624 {
1625 struct mly_softc *sc = (struct mly_softc *)context;
1626
1627 MLY_LOCK(sc);
1628 mly_complete(sc);
1629 MLY_UNLOCK(sc);
1630 }
1631
1632 static void
mly_complete(struct mly_softc * sc)1633 mly_complete(struct mly_softc *sc)
1634 {
1635 struct mly_command *mc;
1636 void (* mc_complete)(struct mly_command *mc);
1637
1638 debug_called(2);
1639
1640 /*
1641 * Spin pulling commands off the completed queue and processing them.
1642 */
1643 while ((mc = mly_dequeue_complete(sc)) != NULL) {
1644
1645 /*
1646 * Free controller resources, mark command complete.
1647 *
1648 * Note that as soon as we mark the command complete, it may be freed
1649 * out from under us, so we need to save the mc_complete field in
1650 * order to later avoid dereferencing mc. (We would not expect to
1651 * have a polling/sleeping consumer with mc_complete != NULL).
1652 */
1653 mly_unmap_command(mc);
1654 mc_complete = mc->mc_complete;
1655 mc->mc_flags |= MLY_CMD_COMPLETE;
1656
1657 /*
1658 * Call completion handler or wake up sleeping consumer.
1659 */
1660 if (mc_complete != NULL) {
1661 mc_complete(mc);
1662 } else {
1663 wakeup(mc);
1664 }
1665 }
1666
1667 /*
1668 * XXX if we are deferring commands due to controller-busy status, we should
1669 * retry submitting them here.
1670 */
1671 }
1672
1673 /********************************************************************************
1674 ********************************************************************************
1675 Command Buffer Management
1676 ********************************************************************************
1677 ********************************************************************************/
1678
1679 /********************************************************************************
1680 * Allocate a command.
1681 */
1682 static int
mly_alloc_command(struct mly_softc * sc,struct mly_command ** mcp)1683 mly_alloc_command(struct mly_softc *sc, struct mly_command **mcp)
1684 {
1685 struct mly_command *mc;
1686
1687 debug_called(3);
1688
1689 if ((mc = mly_dequeue_free(sc)) == NULL)
1690 return(ENOMEM);
1691
1692 *mcp = mc;
1693 return(0);
1694 }
1695
1696 /********************************************************************************
1697 * Release a command back to the freelist.
1698 */
1699 static void
mly_release_command(struct mly_command * mc)1700 mly_release_command(struct mly_command *mc)
1701 {
1702 debug_called(3);
1703
1704 /*
1705 * Fill in parts of the command that may cause confusion if
1706 * a consumer doesn't when we are later allocated.
1707 */
1708 mc->mc_data = NULL;
1709 mc->mc_flags = 0;
1710 mc->mc_complete = NULL;
1711 mc->mc_private = NULL;
1712
1713 /*
1714 * By default, we set up to overwrite the command packet with
1715 * sense information.
1716 */
1717 mc->mc_packet->generic.sense_buffer_address = mc->mc_packetphys;
1718 mc->mc_packet->generic.maximum_sense_size = sizeof(union mly_command_packet);
1719
1720 mly_enqueue_free(mc);
1721 }
1722
1723 /********************************************************************************
1724 * Map helper for command allocation.
1725 */
1726 static void
mly_alloc_commands_map(void * arg,bus_dma_segment_t * segs,int nseg,int error)1727 mly_alloc_commands_map(void *arg, bus_dma_segment_t *segs, int nseg, int error)
1728 {
1729 struct mly_softc *sc = (struct mly_softc *)arg;
1730
1731 debug_called(1);
1732
1733 sc->mly_packetphys = segs[0].ds_addr;
1734 }
1735
1736 /********************************************************************************
1737 * Allocate and initialise command and packet structures.
1738 *
1739 * If the controller supports fewer than MLY_MAX_COMMANDS commands, limit our
1740 * allocation to that number. If we don't yet know how many commands the
1741 * controller supports, allocate a very small set (suitable for initialisation
1742 * purposes only).
1743 */
1744 static int
mly_alloc_commands(struct mly_softc * sc)1745 mly_alloc_commands(struct mly_softc *sc)
1746 {
1747 struct mly_command *mc;
1748 int i, ncmd;
1749
1750 if (sc->mly_controllerinfo == NULL) {
1751 ncmd = 4;
1752 } else {
1753 ncmd = min(MLY_MAX_COMMANDS, sc->mly_controllerinfo->maximum_parallel_commands);
1754 }
1755
1756 /*
1757 * Allocate enough space for all the command packets in one chunk and
1758 * map them permanently into controller-visible space.
1759 */
1760 if (bus_dmamem_alloc(sc->mly_packet_dmat, (void **)&sc->mly_packet,
1761 BUS_DMA_NOWAIT, &sc->mly_packetmap)) {
1762 return(ENOMEM);
1763 }
1764 if (bus_dmamap_load(sc->mly_packet_dmat, sc->mly_packetmap, sc->mly_packet,
1765 ncmd * sizeof(union mly_command_packet),
1766 mly_alloc_commands_map, sc, BUS_DMA_NOWAIT) != 0)
1767 return (ENOMEM);
1768
1769 for (i = 0; i < ncmd; i++) {
1770 mc = &sc->mly_command[i];
1771 bzero(mc, sizeof(*mc));
1772 mc->mc_sc = sc;
1773 mc->mc_slot = MLY_SLOT_START + i;
1774 mc->mc_packet = sc->mly_packet + i;
1775 mc->mc_packetphys = sc->mly_packetphys + (i * sizeof(union mly_command_packet));
1776 if (!bus_dmamap_create(sc->mly_buffer_dmat, 0, &mc->mc_datamap))
1777 mly_release_command(mc);
1778 }
1779 return(0);
1780 }
1781
1782 /********************************************************************************
1783 * Free all the storage held by commands.
1784 *
1785 * Must be called with all commands on the free list.
1786 */
1787 static void
mly_release_commands(struct mly_softc * sc)1788 mly_release_commands(struct mly_softc *sc)
1789 {
1790 struct mly_command *mc;
1791
1792 /* throw away command buffer DMA maps */
1793 while (mly_alloc_command(sc, &mc) == 0)
1794 bus_dmamap_destroy(sc->mly_buffer_dmat, mc->mc_datamap);
1795
1796 /* release the packet storage */
1797 if (sc->mly_packet != NULL) {
1798 bus_dmamap_unload(sc->mly_packet_dmat, sc->mly_packetmap);
1799 bus_dmamem_free(sc->mly_packet_dmat, sc->mly_packet, sc->mly_packetmap);
1800 sc->mly_packet = NULL;
1801 }
1802 }
1803
1804
1805 /********************************************************************************
1806 * Command-mapping helper function - populate this command's s/g table
1807 * with the s/g entries for its data.
1808 */
1809 static void
mly_map_command_sg(void * arg,bus_dma_segment_t * segs,int nseg,int error)1810 mly_map_command_sg(void *arg, bus_dma_segment_t *segs, int nseg, int error)
1811 {
1812 struct mly_command *mc = (struct mly_command *)arg;
1813 struct mly_softc *sc = mc->mc_sc;
1814 struct mly_command_generic *gen = &(mc->mc_packet->generic);
1815 struct mly_sg_entry *sg;
1816 int i, tabofs;
1817
1818 debug_called(2);
1819
1820 /* can we use the transfer structure directly? */
1821 if (nseg <= 2) {
1822 sg = &gen->transfer.direct.sg[0];
1823 gen->command_control.extended_sg_table = 0;
1824 } else {
1825 tabofs = ((mc->mc_slot - MLY_SLOT_START) * MLY_MAX_SGENTRIES);
1826 sg = sc->mly_sg_table + tabofs;
1827 gen->transfer.indirect.entries[0] = nseg;
1828 gen->transfer.indirect.table_physaddr[0] = sc->mly_sg_busaddr + (tabofs * sizeof(struct mly_sg_entry));
1829 gen->command_control.extended_sg_table = 1;
1830 }
1831
1832 /* copy the s/g table */
1833 for (i = 0; i < nseg; i++) {
1834 sg[i].physaddr = segs[i].ds_addr;
1835 sg[i].length = segs[i].ds_len;
1836 }
1837
1838 }
1839
1840 #if 0
1841 /********************************************************************************
1842 * Command-mapping helper function - save the cdb's physical address.
1843 *
1844 * We don't support 'large' SCSI commands at this time, so this is unused.
1845 */
1846 static void
1847 mly_map_command_cdb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
1848 {
1849 struct mly_command *mc = (struct mly_command *)arg;
1850
1851 debug_called(2);
1852
1853 /* XXX can we safely assume that a CDB will never cross a page boundary? */
1854 if ((segs[0].ds_addr % PAGE_SIZE) >
1855 ((segs[0].ds_addr + mc->mc_packet->scsi_large.cdb_length) % PAGE_SIZE))
1856 panic("cdb crosses page boundary");
1857
1858 /* fix up fields in the command packet */
1859 mc->mc_packet->scsi_large.cdb_physaddr = segs[0].ds_addr;
1860 }
1861 #endif
1862
1863 /********************************************************************************
1864 * Map a command into controller-visible space
1865 */
1866 static void
mly_map_command(struct mly_command * mc)1867 mly_map_command(struct mly_command *mc)
1868 {
1869 struct mly_softc *sc = mc->mc_sc;
1870
1871 debug_called(2);
1872
1873 /* don't map more than once */
1874 if (mc->mc_flags & MLY_CMD_MAPPED)
1875 return;
1876
1877 /* does the command have a data buffer? */
1878 if (mc->mc_data != NULL) {
1879 if (mc->mc_flags & MLY_CMD_CCB)
1880 bus_dmamap_load_ccb(sc->mly_buffer_dmat, mc->mc_datamap,
1881 mc->mc_data, mly_map_command_sg, mc, 0);
1882 else
1883 bus_dmamap_load(sc->mly_buffer_dmat, mc->mc_datamap,
1884 mc->mc_data, mc->mc_length,
1885 mly_map_command_sg, mc, 0);
1886 if (mc->mc_flags & MLY_CMD_DATAIN)
1887 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_PREREAD);
1888 if (mc->mc_flags & MLY_CMD_DATAOUT)
1889 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_PREWRITE);
1890 }
1891 mc->mc_flags |= MLY_CMD_MAPPED;
1892 }
1893
1894 /********************************************************************************
1895 * Unmap a command from controller-visible space
1896 */
1897 static void
mly_unmap_command(struct mly_command * mc)1898 mly_unmap_command(struct mly_command *mc)
1899 {
1900 struct mly_softc *sc = mc->mc_sc;
1901
1902 debug_called(2);
1903
1904 if (!(mc->mc_flags & MLY_CMD_MAPPED))
1905 return;
1906
1907 /* does the command have a data buffer? */
1908 if (mc->mc_data != NULL) {
1909 if (mc->mc_flags & MLY_CMD_DATAIN)
1910 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_POSTREAD);
1911 if (mc->mc_flags & MLY_CMD_DATAOUT)
1912 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_POSTWRITE);
1913
1914 bus_dmamap_unload(sc->mly_buffer_dmat, mc->mc_datamap);
1915 }
1916 mc->mc_flags &= ~MLY_CMD_MAPPED;
1917 }
1918
1919
1920 /********************************************************************************
1921 ********************************************************************************
1922 CAM interface
1923 ********************************************************************************
1924 ********************************************************************************/
1925
1926 /********************************************************************************
1927 * Attach the physical and virtual SCSI busses to CAM.
1928 *
1929 * Physical bus numbering starts from 0, virtual bus numbering from one greater
1930 * than the highest physical bus. Physical busses are only registered if
1931 * the kernel environment variable "hw.mly.register_physical_channels" is set.
1932 *
1933 * When we refer to a "bus", we are referring to the bus number registered with
1934 * the SIM, whereas a "channel" is a channel number given to the adapter. In order
1935 * to keep things simple, we map these 1:1, so "bus" and "channel" may be used
1936 * interchangeably.
1937 */
1938 static int
mly_cam_attach(struct mly_softc * sc)1939 mly_cam_attach(struct mly_softc *sc)
1940 {
1941 struct cam_devq *devq;
1942 int chn, i;
1943
1944 debug_called(1);
1945
1946 /*
1947 * Allocate a devq for all our channels combined.
1948 */
1949 if ((devq = cam_simq_alloc(sc->mly_controllerinfo->maximum_parallel_commands)) == NULL) {
1950 mly_printf(sc, "can't allocate CAM SIM queue\n");
1951 return(ENOMEM);
1952 }
1953
1954 /*
1955 * If physical channel registration has been requested, register these first.
1956 * Note that we enable tagged command queueing for physical channels.
1957 */
1958 if (testenv("hw.mly.register_physical_channels")) {
1959 chn = 0;
1960 for (i = 0; i < sc->mly_controllerinfo->physical_channels_present; i++, chn++) {
1961
1962 if ((sc->mly_cam_sim[chn] = cam_sim_alloc(mly_cam_action, mly_cam_poll, "mly", sc,
1963 device_get_unit(sc->mly_dev),
1964 &sc->mly_lock,
1965 sc->mly_controllerinfo->maximum_parallel_commands,
1966 1, devq)) == NULL) {
1967 return(ENOMEM);
1968 }
1969 MLY_LOCK(sc);
1970 if (xpt_bus_register(sc->mly_cam_sim[chn], sc->mly_dev, chn)) {
1971 MLY_UNLOCK(sc);
1972 mly_printf(sc, "CAM XPT phsyical channel registration failed\n");
1973 return(ENXIO);
1974 }
1975 MLY_UNLOCK(sc);
1976 debug(1, "registered physical channel %d", chn);
1977 }
1978 }
1979
1980 /*
1981 * Register our virtual channels, with bus numbers matching channel numbers.
1982 */
1983 chn = sc->mly_controllerinfo->physical_channels_present;
1984 for (i = 0; i < sc->mly_controllerinfo->virtual_channels_present; i++, chn++) {
1985 if ((sc->mly_cam_sim[chn] = cam_sim_alloc(mly_cam_action, mly_cam_poll, "mly", sc,
1986 device_get_unit(sc->mly_dev),
1987 &sc->mly_lock,
1988 sc->mly_controllerinfo->maximum_parallel_commands,
1989 0, devq)) == NULL) {
1990 return(ENOMEM);
1991 }
1992 MLY_LOCK(sc);
1993 if (xpt_bus_register(sc->mly_cam_sim[chn], sc->mly_dev, chn)) {
1994 MLY_UNLOCK(sc);
1995 mly_printf(sc, "CAM XPT virtual channel registration failed\n");
1996 return(ENXIO);
1997 }
1998 MLY_UNLOCK(sc);
1999 debug(1, "registered virtual channel %d", chn);
2000 }
2001
2002 /*
2003 * This is the total number of channels that (might have been) registered with
2004 * CAM. Some may not have been; check the mly_cam_sim array to be certain.
2005 */
2006 sc->mly_cam_channels = sc->mly_controllerinfo->physical_channels_present +
2007 sc->mly_controllerinfo->virtual_channels_present;
2008
2009 return(0);
2010 }
2011
2012 /********************************************************************************
2013 * Detach from CAM
2014 */
2015 static void
mly_cam_detach(struct mly_softc * sc)2016 mly_cam_detach(struct mly_softc *sc)
2017 {
2018 int i;
2019
2020 debug_called(1);
2021
2022 MLY_LOCK(sc);
2023 for (i = 0; i < sc->mly_cam_channels; i++) {
2024 if (sc->mly_cam_sim[i] != NULL) {
2025 xpt_bus_deregister(cam_sim_path(sc->mly_cam_sim[i]));
2026 cam_sim_free(sc->mly_cam_sim[i], 0);
2027 }
2028 }
2029 MLY_UNLOCK(sc);
2030 if (sc->mly_cam_devq != NULL)
2031 cam_simq_free(sc->mly_cam_devq);
2032 }
2033
2034 /************************************************************************
2035 * Rescan a device.
2036 */
2037 static void
mly_cam_rescan_btl(struct mly_softc * sc,int bus,int target)2038 mly_cam_rescan_btl(struct mly_softc *sc, int bus, int target)
2039 {
2040 union ccb *ccb;
2041
2042 debug_called(1);
2043
2044 if ((ccb = xpt_alloc_ccb()) == NULL) {
2045 mly_printf(sc, "rescan failed (can't allocate CCB)\n");
2046 return;
2047 }
2048 if (xpt_create_path(&ccb->ccb_h.path, NULL,
2049 cam_sim_path(sc->mly_cam_sim[bus]), target, 0) != CAM_REQ_CMP) {
2050 mly_printf(sc, "rescan failed (can't create path)\n");
2051 xpt_free_ccb(ccb);
2052 return;
2053 }
2054 debug(1, "rescan target %d:%d", bus, target);
2055 xpt_rescan(ccb);
2056 }
2057
2058 /********************************************************************************
2059 * Handle an action requested by CAM
2060 */
2061 static void
mly_cam_action(struct cam_sim * sim,union ccb * ccb)2062 mly_cam_action(struct cam_sim *sim, union ccb *ccb)
2063 {
2064 struct mly_softc *sc = cam_sim_softc(sim);
2065
2066 debug_called(2);
2067 MLY_ASSERT_LOCKED(sc);
2068
2069 switch (ccb->ccb_h.func_code) {
2070
2071 /* perform SCSI I/O */
2072 case XPT_SCSI_IO:
2073 if (!mly_cam_action_io(sim, (struct ccb_scsiio *)&ccb->csio))
2074 return;
2075 break;
2076
2077 /* perform geometry calculations */
2078 case XPT_CALC_GEOMETRY:
2079 {
2080 struct ccb_calc_geometry *ccg = &ccb->ccg;
2081 u_int32_t secs_per_cylinder;
2082
2083 debug(2, "XPT_CALC_GEOMETRY %d:%d:%d", cam_sim_bus(sim), ccb->ccb_h.target_id, ccb->ccb_h.target_lun);
2084
2085 if (sc->mly_controllerparam->bios_geometry == MLY_BIOSGEOM_8G) {
2086 ccg->heads = 255;
2087 ccg->secs_per_track = 63;
2088 } else { /* MLY_BIOSGEOM_2G */
2089 ccg->heads = 128;
2090 ccg->secs_per_track = 32;
2091 }
2092 secs_per_cylinder = ccg->heads * ccg->secs_per_track;
2093 ccg->cylinders = ccg->volume_size / secs_per_cylinder;
2094 ccb->ccb_h.status = CAM_REQ_CMP;
2095 break;
2096 }
2097
2098 /* handle path attribute inquiry */
2099 case XPT_PATH_INQ:
2100 {
2101 struct ccb_pathinq *cpi = &ccb->cpi;
2102
2103 debug(2, "XPT_PATH_INQ %d:%d:%d", cam_sim_bus(sim), ccb->ccb_h.target_id, ccb->ccb_h.target_lun);
2104
2105 cpi->version_num = 1;
2106 cpi->hba_inquiry = PI_TAG_ABLE; /* XXX extra flags for physical channels? */
2107 cpi->target_sprt = 0;
2108 cpi->hba_misc = 0;
2109 cpi->max_target = MLY_MAX_TARGETS - 1;
2110 cpi->max_lun = MLY_MAX_LUNS - 1;
2111 cpi->initiator_id = sc->mly_controllerparam->initiator_id;
2112 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
2113 strlcpy(cpi->hba_vid, "Mylex", HBA_IDLEN);
2114 strlcpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
2115 cpi->unit_number = cam_sim_unit(sim);
2116 cpi->bus_id = cam_sim_bus(sim);
2117 cpi->base_transfer_speed = 132 * 1024; /* XXX what to set this to? */
2118 cpi->transport = XPORT_SPI;
2119 cpi->transport_version = 2;
2120 cpi->protocol = PROTO_SCSI;
2121 cpi->protocol_version = SCSI_REV_2;
2122 ccb->ccb_h.status = CAM_REQ_CMP;
2123 break;
2124 }
2125
2126 case XPT_GET_TRAN_SETTINGS:
2127 {
2128 struct ccb_trans_settings *cts = &ccb->cts;
2129 int bus, target;
2130 struct ccb_trans_settings_scsi *scsi = &cts->proto_specific.scsi;
2131 struct ccb_trans_settings_spi *spi = &cts->xport_specific.spi;
2132
2133 cts->protocol = PROTO_SCSI;
2134 cts->protocol_version = SCSI_REV_2;
2135 cts->transport = XPORT_SPI;
2136 cts->transport_version = 2;
2137
2138 scsi->flags = 0;
2139 scsi->valid = 0;
2140 spi->flags = 0;
2141 spi->valid = 0;
2142
2143 bus = cam_sim_bus(sim);
2144 target = cts->ccb_h.target_id;
2145 debug(2, "XPT_GET_TRAN_SETTINGS %d:%d", bus, target);
2146 /* logical device? */
2147 if (sc->mly_btl[bus][target].mb_flags & MLY_BTL_LOGICAL) {
2148 /* nothing special for these */
2149 /* physical device? */
2150 } else if (sc->mly_btl[bus][target].mb_flags & MLY_BTL_PHYSICAL) {
2151 /* allow CAM to try tagged transactions */
2152 scsi->flags |= CTS_SCSI_FLAGS_TAG_ENB;
2153 scsi->valid |= CTS_SCSI_VALID_TQ;
2154
2155 /* convert speed (MHz) to usec */
2156 if (sc->mly_btl[bus][target].mb_speed == 0) {
2157 spi->sync_period = 1000000 / 5;
2158 } else {
2159 spi->sync_period = 1000000 / sc->mly_btl[bus][target].mb_speed;
2160 }
2161
2162 /* convert bus width to CAM internal encoding */
2163 switch (sc->mly_btl[bus][target].mb_width) {
2164 case 32:
2165 spi->bus_width = MSG_EXT_WDTR_BUS_32_BIT;
2166 break;
2167 case 16:
2168 spi->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
2169 break;
2170 case 8:
2171 default:
2172 spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
2173 break;
2174 }
2175 spi->valid |= CTS_SPI_VALID_SYNC_RATE | CTS_SPI_VALID_BUS_WIDTH;
2176
2177 /* not a device, bail out */
2178 } else {
2179 cts->ccb_h.status = CAM_REQ_CMP_ERR;
2180 break;
2181 }
2182
2183 /* disconnect always OK */
2184 spi->flags |= CTS_SPI_FLAGS_DISC_ENB;
2185 spi->valid |= CTS_SPI_VALID_DISC;
2186
2187 cts->ccb_h.status = CAM_REQ_CMP;
2188 break;
2189 }
2190
2191 default: /* we can't do this */
2192 debug(2, "unspported func_code = 0x%x", ccb->ccb_h.func_code);
2193 ccb->ccb_h.status = CAM_REQ_INVALID;
2194 break;
2195 }
2196
2197 xpt_done(ccb);
2198 }
2199
2200 /********************************************************************************
2201 * Handle an I/O operation requested by CAM
2202 */
2203 static int
mly_cam_action_io(struct cam_sim * sim,struct ccb_scsiio * csio)2204 mly_cam_action_io(struct cam_sim *sim, struct ccb_scsiio *csio)
2205 {
2206 struct mly_softc *sc = cam_sim_softc(sim);
2207 struct mly_command *mc;
2208 struct mly_command_scsi_small *ss;
2209 int bus, target;
2210 int error;
2211
2212 bus = cam_sim_bus(sim);
2213 target = csio->ccb_h.target_id;
2214
2215 debug(2, "XPT_SCSI_IO %d:%d:%d", bus, target, csio->ccb_h.target_lun);
2216
2217 /* validate bus number */
2218 if (!MLY_BUS_IS_VALID(sc, bus)) {
2219 debug(0, " invalid bus %d", bus);
2220 csio->ccb_h.status = CAM_REQ_CMP_ERR;
2221 }
2222
2223 /* check for I/O attempt to a protected device */
2224 if (sc->mly_btl[bus][target].mb_flags & MLY_BTL_PROTECTED) {
2225 debug(2, " device protected");
2226 csio->ccb_h.status = CAM_REQ_CMP_ERR;
2227 }
2228
2229 /* check for I/O attempt to nonexistent device */
2230 if (!(sc->mly_btl[bus][target].mb_flags & (MLY_BTL_LOGICAL | MLY_BTL_PHYSICAL))) {
2231 debug(2, " device %d:%d does not exist", bus, target);
2232 csio->ccb_h.status = CAM_REQ_CMP_ERR;
2233 }
2234
2235 /* XXX increase if/when we support large SCSI commands */
2236 if (csio->cdb_len > MLY_CMD_SCSI_SMALL_CDB) {
2237 debug(0, " command too large (%d > %d)", csio->cdb_len, MLY_CMD_SCSI_SMALL_CDB);
2238 csio->ccb_h.status = CAM_REQ_CMP_ERR;
2239 }
2240
2241 /* check that the CDB pointer is not to a physical address */
2242 if ((csio->ccb_h.flags & CAM_CDB_POINTER) && (csio->ccb_h.flags & CAM_CDB_PHYS)) {
2243 debug(0, " CDB pointer is to physical address");
2244 csio->ccb_h.status = CAM_REQ_CMP_ERR;
2245 }
2246
2247 /* abandon aborted ccbs or those that have failed validation */
2248 if ((csio->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_INPROG) {
2249 debug(2, "abandoning CCB due to abort/validation failure");
2250 return(EINVAL);
2251 }
2252
2253 /*
2254 * Get a command, or push the ccb back to CAM and freeze the queue.
2255 */
2256 if ((error = mly_alloc_command(sc, &mc))) {
2257 xpt_freeze_simq(sim, 1);
2258 csio->ccb_h.status |= CAM_REQUEUE_REQ;
2259 sc->mly_qfrzn_cnt++;
2260 return(error);
2261 }
2262
2263 /* build the command */
2264 mc->mc_data = csio;
2265 mc->mc_length = csio->dxfer_len;
2266 mc->mc_complete = mly_cam_complete;
2267 mc->mc_private = csio;
2268 mc->mc_flags |= MLY_CMD_CCB;
2269 /* XXX This code doesn't set the data direction in mc_flags. */
2270
2271 /* save the bus number in the ccb for later recovery XXX should be a better way */
2272 csio->ccb_h.sim_priv.entries[0].field = bus;
2273
2274 /* build the packet for the controller */
2275 ss = &mc->mc_packet->scsi_small;
2276 ss->opcode = MDACMD_SCSI;
2277 if (csio->ccb_h.flags & CAM_DIS_DISCONNECT)
2278 ss->command_control.disable_disconnect = 1;
2279 if ((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_OUT)
2280 ss->command_control.data_direction = MLY_CCB_WRITE;
2281 ss->data_size = csio->dxfer_len;
2282 ss->addr.phys.lun = csio->ccb_h.target_lun;
2283 ss->addr.phys.target = csio->ccb_h.target_id;
2284 ss->addr.phys.channel = bus;
2285 if (csio->ccb_h.timeout < (60 * 1000)) {
2286 ss->timeout.value = csio->ccb_h.timeout / 1000;
2287 ss->timeout.scale = MLY_TIMEOUT_SECONDS;
2288 } else if (csio->ccb_h.timeout < (60 * 60 * 1000)) {
2289 ss->timeout.value = csio->ccb_h.timeout / (60 * 1000);
2290 ss->timeout.scale = MLY_TIMEOUT_MINUTES;
2291 } else {
2292 ss->timeout.value = csio->ccb_h.timeout / (60 * 60 * 1000); /* overflow? */
2293 ss->timeout.scale = MLY_TIMEOUT_HOURS;
2294 }
2295 ss->maximum_sense_size = csio->sense_len;
2296 ss->cdb_length = csio->cdb_len;
2297 if (csio->ccb_h.flags & CAM_CDB_POINTER) {
2298 bcopy(csio->cdb_io.cdb_ptr, ss->cdb, csio->cdb_len);
2299 } else {
2300 bcopy(csio->cdb_io.cdb_bytes, ss->cdb, csio->cdb_len);
2301 }
2302
2303 /* give the command to the controller */
2304 if ((error = mly_start(mc))) {
2305 xpt_freeze_simq(sim, 1);
2306 csio->ccb_h.status |= CAM_REQUEUE_REQ;
2307 sc->mly_qfrzn_cnt++;
2308 return(error);
2309 }
2310
2311 return(0);
2312 }
2313
2314 /********************************************************************************
2315 * Check for possibly-completed commands.
2316 */
2317 static void
mly_cam_poll(struct cam_sim * sim)2318 mly_cam_poll(struct cam_sim *sim)
2319 {
2320 struct mly_softc *sc = cam_sim_softc(sim);
2321
2322 debug_called(2);
2323
2324 mly_done(sc);
2325 }
2326
2327 /********************************************************************************
2328 * Handle completion of a command - pass results back through the CCB
2329 */
2330 static void
mly_cam_complete(struct mly_command * mc)2331 mly_cam_complete(struct mly_command *mc)
2332 {
2333 struct mly_softc *sc = mc->mc_sc;
2334 struct ccb_scsiio *csio = (struct ccb_scsiio *)mc->mc_private;
2335 struct scsi_inquiry_data *inq = (struct scsi_inquiry_data *)csio->data_ptr;
2336 struct mly_btl *btl;
2337 u_int8_t cmd;
2338 int bus, target;
2339
2340 debug_called(2);
2341
2342 csio->scsi_status = mc->mc_status;
2343 switch(mc->mc_status) {
2344 case SCSI_STATUS_OK:
2345 /*
2346 * In order to report logical device type and status, we overwrite
2347 * the result of the INQUIRY command to logical devices.
2348 */
2349 bus = csio->ccb_h.sim_priv.entries[0].field;
2350 target = csio->ccb_h.target_id;
2351 /* XXX validate bus/target? */
2352 if (sc->mly_btl[bus][target].mb_flags & MLY_BTL_LOGICAL) {
2353 if (csio->ccb_h.flags & CAM_CDB_POINTER) {
2354 cmd = *csio->cdb_io.cdb_ptr;
2355 } else {
2356 cmd = csio->cdb_io.cdb_bytes[0];
2357 }
2358 if (cmd == INQUIRY) {
2359 btl = &sc->mly_btl[bus][target];
2360 padstr(inq->vendor, mly_describe_code(mly_table_device_type, btl->mb_type), 8);
2361 padstr(inq->product, mly_describe_code(mly_table_device_state, btl->mb_state), 16);
2362 padstr(inq->revision, "", 4);
2363 }
2364 }
2365
2366 debug(2, "SCSI_STATUS_OK");
2367 csio->ccb_h.status = CAM_REQ_CMP;
2368 break;
2369
2370 case SCSI_STATUS_CHECK_COND:
2371 debug(1, "SCSI_STATUS_CHECK_COND sense %d resid %d", mc->mc_sense, mc->mc_resid);
2372 csio->ccb_h.status = CAM_SCSI_STATUS_ERROR;
2373 bzero(&csio->sense_data, SSD_FULL_SIZE);
2374 bcopy(mc->mc_packet, &csio->sense_data, mc->mc_sense);
2375 csio->sense_len = mc->mc_sense;
2376 csio->ccb_h.status |= CAM_AUTOSNS_VALID;
2377 csio->resid = mc->mc_resid; /* XXX this is a signed value... */
2378 break;
2379
2380 case SCSI_STATUS_BUSY:
2381 debug(1, "SCSI_STATUS_BUSY");
2382 csio->ccb_h.status = CAM_SCSI_BUSY;
2383 break;
2384
2385 default:
2386 debug(1, "unknown status 0x%x", csio->scsi_status);
2387 csio->ccb_h.status = CAM_REQ_CMP_ERR;
2388 break;
2389 }
2390
2391 if (sc->mly_qfrzn_cnt) {
2392 csio->ccb_h.status |= CAM_RELEASE_SIMQ;
2393 sc->mly_qfrzn_cnt--;
2394 }
2395
2396 xpt_done((union ccb *)csio);
2397 mly_release_command(mc);
2398 }
2399
2400 /********************************************************************************
2401 * Find a peripheral attahed at (bus),(target)
2402 */
2403 static struct cam_periph *
mly_find_periph(struct mly_softc * sc,int bus,int target)2404 mly_find_periph(struct mly_softc *sc, int bus, int target)
2405 {
2406 struct cam_periph *periph;
2407 struct cam_path *path;
2408 int status;
2409
2410 status = xpt_create_path(&path, NULL, cam_sim_path(sc->mly_cam_sim[bus]), target, 0);
2411 if (status == CAM_REQ_CMP) {
2412 periph = cam_periph_find(path, NULL);
2413 xpt_free_path(path);
2414 } else {
2415 periph = NULL;
2416 }
2417 return(periph);
2418 }
2419
2420 /********************************************************************************
2421 * Name the device at (bus)(target)
2422 */
2423 static int
mly_name_device(struct mly_softc * sc,int bus,int target)2424 mly_name_device(struct mly_softc *sc, int bus, int target)
2425 {
2426 struct cam_periph *periph;
2427
2428 if ((periph = mly_find_periph(sc, bus, target)) != NULL) {
2429 sprintf(sc->mly_btl[bus][target].mb_name, "%s%d", periph->periph_name, periph->unit_number);
2430 return(0);
2431 }
2432 sc->mly_btl[bus][target].mb_name[0] = 0;
2433 return(ENOENT);
2434 }
2435
2436 /********************************************************************************
2437 ********************************************************************************
2438 Hardware Control
2439 ********************************************************************************
2440 ********************************************************************************/
2441
2442 /********************************************************************************
2443 * Handshake with the firmware while the card is being initialised.
2444 */
2445 static int
mly_fwhandshake(struct mly_softc * sc)2446 mly_fwhandshake(struct mly_softc *sc)
2447 {
2448 u_int8_t error, param0, param1;
2449 int spinup = 0;
2450
2451 debug_called(1);
2452
2453 /* set HM_STSACK and let the firmware initialise */
2454 MLY_SET_REG(sc, sc->mly_idbr, MLY_HM_STSACK);
2455 DELAY(1000); /* too short? */
2456
2457 /* if HM_STSACK is still true, the controller is initialising */
2458 if (!MLY_IDBR_TRUE(sc, MLY_HM_STSACK))
2459 return(0);
2460 mly_printf(sc, "controller initialisation started\n");
2461
2462 /* spin waiting for initialisation to finish, or for a message to be delivered */
2463 while (MLY_IDBR_TRUE(sc, MLY_HM_STSACK)) {
2464 /* check for a message */
2465 if (MLY_ERROR_VALID(sc)) {
2466 error = MLY_GET_REG(sc, sc->mly_error_status) & ~MLY_MSG_EMPTY;
2467 param0 = MLY_GET_REG(sc, sc->mly_command_mailbox);
2468 param1 = MLY_GET_REG(sc, sc->mly_command_mailbox + 1);
2469
2470 switch(error) {
2471 case MLY_MSG_SPINUP:
2472 if (!spinup) {
2473 mly_printf(sc, "drive spinup in progress\n");
2474 spinup = 1; /* only print this once (should print drive being spun?) */
2475 }
2476 break;
2477 case MLY_MSG_RACE_RECOVERY_FAIL:
2478 mly_printf(sc, "mirror race recovery failed, one or more drives offline\n");
2479 break;
2480 case MLY_MSG_RACE_IN_PROGRESS:
2481 mly_printf(sc, "mirror race recovery in progress\n");
2482 break;
2483 case MLY_MSG_RACE_ON_CRITICAL:
2484 mly_printf(sc, "mirror race recovery on a critical drive\n");
2485 break;
2486 case MLY_MSG_PARITY_ERROR:
2487 mly_printf(sc, "FATAL MEMORY PARITY ERROR\n");
2488 return(ENXIO);
2489 default:
2490 mly_printf(sc, "unknown initialisation code 0x%x\n", error);
2491 }
2492 }
2493 }
2494 return(0);
2495 }
2496
2497 /********************************************************************************
2498 ********************************************************************************
2499 Debugging and Diagnostics
2500 ********************************************************************************
2501 ********************************************************************************/
2502
2503 /********************************************************************************
2504 * Print some information about the controller.
2505 */
2506 static void
mly_describe_controller(struct mly_softc * sc)2507 mly_describe_controller(struct mly_softc *sc)
2508 {
2509 struct mly_ioctl_getcontrollerinfo *mi = sc->mly_controllerinfo;
2510
2511 mly_printf(sc, "%16s, %d channel%s, firmware %d.%02d-%d-%02d (%02d%02d%02d%02d), %dMB RAM\n",
2512 mi->controller_name, mi->physical_channels_present, (mi->physical_channels_present) > 1 ? "s" : "",
2513 mi->fw_major, mi->fw_minor, mi->fw_turn, mi->fw_build, /* XXX turn encoding? */
2514 mi->fw_century, mi->fw_year, mi->fw_month, mi->fw_day,
2515 mi->memory_size);
2516
2517 if (bootverbose) {
2518 mly_printf(sc, "%s %s (%x), %dMHz %d-bit %.16s\n",
2519 mly_describe_code(mly_table_oemname, mi->oem_information),
2520 mly_describe_code(mly_table_controllertype, mi->controller_type), mi->controller_type,
2521 mi->interface_speed, mi->interface_width, mi->interface_name);
2522 mly_printf(sc, "%dMB %dMHz %d-bit %s%s%s, cache %dMB\n",
2523 mi->memory_size, mi->memory_speed, mi->memory_width,
2524 mly_describe_code(mly_table_memorytype, mi->memory_type),
2525 mi->memory_parity ? "+parity": "",mi->memory_ecc ? "+ECC": "",
2526 mi->cache_size);
2527 mly_printf(sc, "CPU: %s @ %dMHz\n",
2528 mly_describe_code(mly_table_cputype, mi->cpu[0].type), mi->cpu[0].speed);
2529 if (mi->l2cache_size != 0)
2530 mly_printf(sc, "%dKB L2 cache\n", mi->l2cache_size);
2531 if (mi->exmemory_size != 0)
2532 mly_printf(sc, "%dMB %dMHz %d-bit private %s%s%s\n",
2533 mi->exmemory_size, mi->exmemory_speed, mi->exmemory_width,
2534 mly_describe_code(mly_table_memorytype, mi->exmemory_type),
2535 mi->exmemory_parity ? "+parity": "",mi->exmemory_ecc ? "+ECC": "");
2536 mly_printf(sc, "battery backup %s\n", mi->bbu_present ? "present" : "not installed");
2537 mly_printf(sc, "maximum data transfer %d blocks, maximum sg entries/command %d\n",
2538 mi->maximum_block_count, mi->maximum_sg_entries);
2539 mly_printf(sc, "logical devices present/critical/offline %d/%d/%d\n",
2540 mi->logical_devices_present, mi->logical_devices_critical, mi->logical_devices_offline);
2541 mly_printf(sc, "physical devices present %d\n",
2542 mi->physical_devices_present);
2543 mly_printf(sc, "physical disks present/offline %d/%d\n",
2544 mi->physical_disks_present, mi->physical_disks_offline);
2545 mly_printf(sc, "%d physical channel%s, %d virtual channel%s of %d possible\n",
2546 mi->physical_channels_present, mi->physical_channels_present == 1 ? "" : "s",
2547 mi->virtual_channels_present, mi->virtual_channels_present == 1 ? "" : "s",
2548 mi->virtual_channels_possible);
2549 mly_printf(sc, "%d parallel commands supported\n", mi->maximum_parallel_commands);
2550 mly_printf(sc, "%dMB flash ROM, %d of %d maximum cycles\n",
2551 mi->flash_size, mi->flash_age, mi->flash_maximum_age);
2552 }
2553 }
2554
2555 #ifdef MLY_DEBUG
2556 /********************************************************************************
2557 * Print some controller state
2558 */
2559 static void
mly_printstate(struct mly_softc * sc)2560 mly_printstate(struct mly_softc *sc)
2561 {
2562 mly_printf(sc, "IDBR %02x ODBR %02x ERROR %02x (%x %x %x)\n",
2563 MLY_GET_REG(sc, sc->mly_idbr),
2564 MLY_GET_REG(sc, sc->mly_odbr),
2565 MLY_GET_REG(sc, sc->mly_error_status),
2566 sc->mly_idbr,
2567 sc->mly_odbr,
2568 sc->mly_error_status);
2569 mly_printf(sc, "IMASK %02x ISTATUS %02x\n",
2570 MLY_GET_REG(sc, sc->mly_interrupt_mask),
2571 MLY_GET_REG(sc, sc->mly_interrupt_status));
2572 mly_printf(sc, "COMMAND %02x %02x %02x %02x %02x %02x %02x %02x\n",
2573 MLY_GET_REG(sc, sc->mly_command_mailbox),
2574 MLY_GET_REG(sc, sc->mly_command_mailbox + 1),
2575 MLY_GET_REG(sc, sc->mly_command_mailbox + 2),
2576 MLY_GET_REG(sc, sc->mly_command_mailbox + 3),
2577 MLY_GET_REG(sc, sc->mly_command_mailbox + 4),
2578 MLY_GET_REG(sc, sc->mly_command_mailbox + 5),
2579 MLY_GET_REG(sc, sc->mly_command_mailbox + 6),
2580 MLY_GET_REG(sc, sc->mly_command_mailbox + 7));
2581 mly_printf(sc, "STATUS %02x %02x %02x %02x %02x %02x %02x %02x\n",
2582 MLY_GET_REG(sc, sc->mly_status_mailbox),
2583 MLY_GET_REG(sc, sc->mly_status_mailbox + 1),
2584 MLY_GET_REG(sc, sc->mly_status_mailbox + 2),
2585 MLY_GET_REG(sc, sc->mly_status_mailbox + 3),
2586 MLY_GET_REG(sc, sc->mly_status_mailbox + 4),
2587 MLY_GET_REG(sc, sc->mly_status_mailbox + 5),
2588 MLY_GET_REG(sc, sc->mly_status_mailbox + 6),
2589 MLY_GET_REG(sc, sc->mly_status_mailbox + 7));
2590 mly_printf(sc, " %04x %08x\n",
2591 MLY_GET_REG2(sc, sc->mly_status_mailbox),
2592 MLY_GET_REG4(sc, sc->mly_status_mailbox + 4));
2593 }
2594
2595 struct mly_softc *mly_softc0 = NULL;
2596 void
mly_printstate0(void)2597 mly_printstate0(void)
2598 {
2599 if (mly_softc0 != NULL)
2600 mly_printstate(mly_softc0);
2601 }
2602
2603 /********************************************************************************
2604 * Print a command
2605 */
2606 static void
mly_print_command(struct mly_command * mc)2607 mly_print_command(struct mly_command *mc)
2608 {
2609 struct mly_softc *sc = mc->mc_sc;
2610
2611 mly_printf(sc, "COMMAND @ %p\n", mc);
2612 mly_printf(sc, " slot %d\n", mc->mc_slot);
2613 mly_printf(sc, " status 0x%x\n", mc->mc_status);
2614 mly_printf(sc, " sense len %d\n", mc->mc_sense);
2615 mly_printf(sc, " resid %d\n", mc->mc_resid);
2616 mly_printf(sc, " packet %p/0x%llx\n", mc->mc_packet, mc->mc_packetphys);
2617 if (mc->mc_packet != NULL)
2618 mly_print_packet(mc);
2619 mly_printf(sc, " data %p/%d\n", mc->mc_data, mc->mc_length);
2620 mly_printf(sc, " flags %b\n", mc->mc_flags, "\20\1busy\2complete\3slotted\4mapped\5datain\6dataout\n");
2621 mly_printf(sc, " complete %p\n", mc->mc_complete);
2622 mly_printf(sc, " private %p\n", mc->mc_private);
2623 }
2624
2625 /********************************************************************************
2626 * Print a command packet
2627 */
2628 static void
mly_print_packet(struct mly_command * mc)2629 mly_print_packet(struct mly_command *mc)
2630 {
2631 struct mly_softc *sc = mc->mc_sc;
2632 struct mly_command_generic *ge = (struct mly_command_generic *)mc->mc_packet;
2633 struct mly_command_scsi_small *ss = (struct mly_command_scsi_small *)mc->mc_packet;
2634 struct mly_command_scsi_large *sl = (struct mly_command_scsi_large *)mc->mc_packet;
2635 struct mly_command_ioctl *io = (struct mly_command_ioctl *)mc->mc_packet;
2636 int transfer;
2637
2638 mly_printf(sc, " command_id %d\n", ge->command_id);
2639 mly_printf(sc, " opcode %d\n", ge->opcode);
2640 mly_printf(sc, " command_control fua %d dpo %d est %d dd %s nas %d ddis %d\n",
2641 ge->command_control.force_unit_access,
2642 ge->command_control.disable_page_out,
2643 ge->command_control.extended_sg_table,
2644 (ge->command_control.data_direction == MLY_CCB_WRITE) ? "WRITE" : "READ",
2645 ge->command_control.no_auto_sense,
2646 ge->command_control.disable_disconnect);
2647 mly_printf(sc, " data_size %d\n", ge->data_size);
2648 mly_printf(sc, " sense_buffer_address 0x%llx\n", ge->sense_buffer_address);
2649 mly_printf(sc, " lun %d\n", ge->addr.phys.lun);
2650 mly_printf(sc, " target %d\n", ge->addr.phys.target);
2651 mly_printf(sc, " channel %d\n", ge->addr.phys.channel);
2652 mly_printf(sc, " logical device %d\n", ge->addr.log.logdev);
2653 mly_printf(sc, " controller %d\n", ge->addr.phys.controller);
2654 mly_printf(sc, " timeout %d %s\n",
2655 ge->timeout.value,
2656 (ge->timeout.scale == MLY_TIMEOUT_SECONDS) ? "seconds" :
2657 ((ge->timeout.scale == MLY_TIMEOUT_MINUTES) ? "minutes" : "hours"));
2658 mly_printf(sc, " maximum_sense_size %d\n", ge->maximum_sense_size);
2659 switch(ge->opcode) {
2660 case MDACMD_SCSIPT:
2661 case MDACMD_SCSI:
2662 mly_printf(sc, " cdb length %d\n", ss->cdb_length);
2663 mly_printf(sc, " cdb %*D\n", ss->cdb_length, ss->cdb, " ");
2664 transfer = 1;
2665 break;
2666 case MDACMD_SCSILC:
2667 case MDACMD_SCSILCPT:
2668 mly_printf(sc, " cdb length %d\n", sl->cdb_length);
2669 mly_printf(sc, " cdb 0x%llx\n", sl->cdb_physaddr);
2670 transfer = 1;
2671 break;
2672 case MDACMD_IOCTL:
2673 mly_printf(sc, " sub_ioctl 0x%x\n", io->sub_ioctl);
2674 switch(io->sub_ioctl) {
2675 case MDACIOCTL_SETMEMORYMAILBOX:
2676 mly_printf(sc, " health_buffer_size %d\n",
2677 io->param.setmemorymailbox.health_buffer_size);
2678 mly_printf(sc, " health_buffer_phys 0x%llx\n",
2679 io->param.setmemorymailbox.health_buffer_physaddr);
2680 mly_printf(sc, " command_mailbox 0x%llx\n",
2681 io->param.setmemorymailbox.command_mailbox_physaddr);
2682 mly_printf(sc, " status_mailbox 0x%llx\n",
2683 io->param.setmemorymailbox.status_mailbox_physaddr);
2684 transfer = 0;
2685 break;
2686
2687 case MDACIOCTL_SETREALTIMECLOCK:
2688 case MDACIOCTL_GETHEALTHSTATUS:
2689 case MDACIOCTL_GETCONTROLLERINFO:
2690 case MDACIOCTL_GETLOGDEVINFOVALID:
2691 case MDACIOCTL_GETPHYSDEVINFOVALID:
2692 case MDACIOCTL_GETPHYSDEVSTATISTICS:
2693 case MDACIOCTL_GETLOGDEVSTATISTICS:
2694 case MDACIOCTL_GETCONTROLLERSTATISTICS:
2695 case MDACIOCTL_GETBDT_FOR_SYSDRIVE:
2696 case MDACIOCTL_CREATENEWCONF:
2697 case MDACIOCTL_ADDNEWCONF:
2698 case MDACIOCTL_GETDEVCONFINFO:
2699 case MDACIOCTL_GETFREESPACELIST:
2700 case MDACIOCTL_MORE:
2701 case MDACIOCTL_SETPHYSDEVPARAMETER:
2702 case MDACIOCTL_GETPHYSDEVPARAMETER:
2703 case MDACIOCTL_GETLOGDEVPARAMETER:
2704 case MDACIOCTL_SETLOGDEVPARAMETER:
2705 mly_printf(sc, " param %10D\n", io->param.data.param, " ");
2706 transfer = 1;
2707 break;
2708
2709 case MDACIOCTL_GETEVENT:
2710 mly_printf(sc, " event %d\n",
2711 io->param.getevent.sequence_number_low + ((u_int32_t)io->addr.log.logdev << 16));
2712 transfer = 1;
2713 break;
2714
2715 case MDACIOCTL_SETRAIDDEVSTATE:
2716 mly_printf(sc, " state %d\n", io->param.setraiddevstate.state);
2717 transfer = 0;
2718 break;
2719
2720 case MDACIOCTL_XLATEPHYSDEVTORAIDDEV:
2721 mly_printf(sc, " raid_device %d\n", io->param.xlatephysdevtoraiddev.raid_device);
2722 mly_printf(sc, " controller %d\n", io->param.xlatephysdevtoraiddev.controller);
2723 mly_printf(sc, " channel %d\n", io->param.xlatephysdevtoraiddev.channel);
2724 mly_printf(sc, " target %d\n", io->param.xlatephysdevtoraiddev.target);
2725 mly_printf(sc, " lun %d\n", io->param.xlatephysdevtoraiddev.lun);
2726 transfer = 0;
2727 break;
2728
2729 case MDACIOCTL_GETGROUPCONFINFO:
2730 mly_printf(sc, " group %d\n", io->param.getgroupconfinfo.group);
2731 transfer = 1;
2732 break;
2733
2734 case MDACIOCTL_GET_SUBSYSTEM_DATA:
2735 case MDACIOCTL_SET_SUBSYSTEM_DATA:
2736 case MDACIOCTL_STARTDISOCVERY:
2737 case MDACIOCTL_INITPHYSDEVSTART:
2738 case MDACIOCTL_INITPHYSDEVSTOP:
2739 case MDACIOCTL_INITRAIDDEVSTART:
2740 case MDACIOCTL_INITRAIDDEVSTOP:
2741 case MDACIOCTL_REBUILDRAIDDEVSTART:
2742 case MDACIOCTL_REBUILDRAIDDEVSTOP:
2743 case MDACIOCTL_MAKECONSISTENTDATASTART:
2744 case MDACIOCTL_MAKECONSISTENTDATASTOP:
2745 case MDACIOCTL_CONSISTENCYCHECKSTART:
2746 case MDACIOCTL_CONSISTENCYCHECKSTOP:
2747 case MDACIOCTL_RESETDEVICE:
2748 case MDACIOCTL_FLUSHDEVICEDATA:
2749 case MDACIOCTL_PAUSEDEVICE:
2750 case MDACIOCTL_UNPAUSEDEVICE:
2751 case MDACIOCTL_LOCATEDEVICE:
2752 case MDACIOCTL_SETMASTERSLAVEMODE:
2753 case MDACIOCTL_DELETERAIDDEV:
2754 case MDACIOCTL_REPLACEINTERNALDEV:
2755 case MDACIOCTL_CLEARCONF:
2756 case MDACIOCTL_GETCONTROLLERPARAMETER:
2757 case MDACIOCTL_SETCONTRLLERPARAMETER:
2758 case MDACIOCTL_CLEARCONFSUSPMODE:
2759 case MDACIOCTL_STOREIMAGE:
2760 case MDACIOCTL_READIMAGE:
2761 case MDACIOCTL_FLASHIMAGES:
2762 case MDACIOCTL_RENAMERAIDDEV:
2763 default: /* no idea what to print */
2764 transfer = 0;
2765 break;
2766 }
2767 break;
2768
2769 case MDACMD_IOCTLCHECK:
2770 case MDACMD_MEMCOPY:
2771 default:
2772 transfer = 0;
2773 break; /* print nothing */
2774 }
2775 if (transfer) {
2776 if (ge->command_control.extended_sg_table) {
2777 mly_printf(sc, " sg table 0x%llx/%d\n",
2778 ge->transfer.indirect.table_physaddr[0], ge->transfer.indirect.entries[0]);
2779 } else {
2780 mly_printf(sc, " 0000 0x%llx/%lld\n",
2781 ge->transfer.direct.sg[0].physaddr, ge->transfer.direct.sg[0].length);
2782 mly_printf(sc, " 0001 0x%llx/%lld\n",
2783 ge->transfer.direct.sg[1].physaddr, ge->transfer.direct.sg[1].length);
2784 }
2785 }
2786 }
2787
2788 /********************************************************************************
2789 * Panic in a slightly informative fashion
2790 */
2791 static void
mly_panic(struct mly_softc * sc,char * reason)2792 mly_panic(struct mly_softc *sc, char *reason)
2793 {
2794 mly_printstate(sc);
2795 panic(reason);
2796 }
2797
2798 /********************************************************************************
2799 * Print queue statistics, callable from DDB.
2800 */
2801 void
mly_print_controller(int controller)2802 mly_print_controller(int controller)
2803 {
2804 struct mly_softc *sc;
2805
2806 if ((sc = devclass_get_softc(devclass_find("mly"), controller)) == NULL) {
2807 printf("mly: controller %d invalid\n", controller);
2808 } else {
2809 device_printf(sc->mly_dev, "queue curr max\n");
2810 device_printf(sc->mly_dev, "free %04d/%04d\n",
2811 sc->mly_qstat[MLYQ_FREE].q_length, sc->mly_qstat[MLYQ_FREE].q_max);
2812 device_printf(sc->mly_dev, "busy %04d/%04d\n",
2813 sc->mly_qstat[MLYQ_BUSY].q_length, sc->mly_qstat[MLYQ_BUSY].q_max);
2814 device_printf(sc->mly_dev, "complete %04d/%04d\n",
2815 sc->mly_qstat[MLYQ_COMPLETE].q_length, sc->mly_qstat[MLYQ_COMPLETE].q_max);
2816 }
2817 }
2818 #endif
2819
2820
2821 /********************************************************************************
2822 ********************************************************************************
2823 Control device interface
2824 ********************************************************************************
2825 ********************************************************************************/
2826
2827 /********************************************************************************
2828 * Accept an open operation on the control device.
2829 */
2830 static int
mly_user_open(struct cdev * dev,int flags,int fmt,struct thread * td)2831 mly_user_open(struct cdev *dev, int flags, int fmt, struct thread *td)
2832 {
2833 struct mly_softc *sc = dev->si_drv1;
2834
2835 MLY_LOCK(sc);
2836 sc->mly_state |= MLY_STATE_OPEN;
2837 MLY_UNLOCK(sc);
2838 return(0);
2839 }
2840
2841 /********************************************************************************
2842 * Accept the last close on the control device.
2843 */
2844 static int
mly_user_close(struct cdev * dev,int flags,int fmt,struct thread * td)2845 mly_user_close(struct cdev *dev, int flags, int fmt, struct thread *td)
2846 {
2847 struct mly_softc *sc = dev->si_drv1;
2848
2849 MLY_LOCK(sc);
2850 sc->mly_state &= ~MLY_STATE_OPEN;
2851 MLY_UNLOCK(sc);
2852 return (0);
2853 }
2854
2855 /********************************************************************************
2856 * Handle controller-specific control operations.
2857 */
2858 static int
mly_user_ioctl(struct cdev * dev,u_long cmd,caddr_t addr,int32_t flag,struct thread * td)2859 mly_user_ioctl(struct cdev *dev, u_long cmd, caddr_t addr,
2860 int32_t flag, struct thread *td)
2861 {
2862 struct mly_softc *sc = (struct mly_softc *)dev->si_drv1;
2863 struct mly_user_command *uc = (struct mly_user_command *)addr;
2864 struct mly_user_health *uh = (struct mly_user_health *)addr;
2865
2866 switch(cmd) {
2867 case MLYIO_COMMAND:
2868 return(mly_user_command(sc, uc));
2869 case MLYIO_HEALTH:
2870 return(mly_user_health(sc, uh));
2871 default:
2872 return(ENOIOCTL);
2873 }
2874 }
2875
2876 /********************************************************************************
2877 * Execute a command passed in from userspace.
2878 *
2879 * The control structure contains the actual command for the controller, as well
2880 * as the user-space data pointer and data size, and an optional sense buffer
2881 * size/pointer. On completion, the data size is adjusted to the command
2882 * residual, and the sense buffer size to the size of the returned sense data.
2883 *
2884 */
2885 static int
mly_user_command(struct mly_softc * sc,struct mly_user_command * uc)2886 mly_user_command(struct mly_softc *sc, struct mly_user_command *uc)
2887 {
2888 struct mly_command *mc;
2889 int error;
2890
2891 /* allocate a command */
2892 MLY_LOCK(sc);
2893 if (mly_alloc_command(sc, &mc)) {
2894 MLY_UNLOCK(sc);
2895 return (ENOMEM); /* XXX Linux version will wait for a command */
2896 }
2897 MLY_UNLOCK(sc);
2898
2899 /* handle data size/direction */
2900 mc->mc_length = (uc->DataTransferLength >= 0) ? uc->DataTransferLength : -uc->DataTransferLength;
2901 if (mc->mc_length > 0) {
2902 if ((mc->mc_data = malloc(mc->mc_length, M_DEVBUF, M_NOWAIT)) == NULL) {
2903 error = ENOMEM;
2904 goto out;
2905 }
2906 }
2907 if (uc->DataTransferLength > 0) {
2908 mc->mc_flags |= MLY_CMD_DATAIN;
2909 bzero(mc->mc_data, mc->mc_length);
2910 }
2911 if (uc->DataTransferLength < 0) {
2912 mc->mc_flags |= MLY_CMD_DATAOUT;
2913 if ((error = copyin(uc->DataTransferBuffer, mc->mc_data, mc->mc_length)) != 0)
2914 goto out;
2915 }
2916
2917 /* copy the controller command */
2918 bcopy(&uc->CommandMailbox, mc->mc_packet, sizeof(uc->CommandMailbox));
2919
2920 /* clear command completion handler so that we get woken up */
2921 mc->mc_complete = NULL;
2922
2923 /* execute the command */
2924 MLY_LOCK(sc);
2925 if ((error = mly_start(mc)) != 0) {
2926 MLY_UNLOCK(sc);
2927 goto out;
2928 }
2929 while (!(mc->mc_flags & MLY_CMD_COMPLETE))
2930 mtx_sleep(mc, &sc->mly_lock, PRIBIO, "mlyioctl", 0);
2931 MLY_UNLOCK(sc);
2932
2933 /* return the data to userspace */
2934 if (uc->DataTransferLength > 0)
2935 if ((error = copyout(mc->mc_data, uc->DataTransferBuffer, mc->mc_length)) != 0)
2936 goto out;
2937
2938 /* return the sense buffer to userspace */
2939 if ((uc->RequestSenseLength > 0) && (mc->mc_sense > 0)) {
2940 if ((error = copyout(mc->mc_packet, uc->RequestSenseBuffer,
2941 min(uc->RequestSenseLength, mc->mc_sense))) != 0)
2942 goto out;
2943 }
2944
2945 /* return command results to userspace (caller will copy out) */
2946 uc->DataTransferLength = mc->mc_resid;
2947 uc->RequestSenseLength = min(uc->RequestSenseLength, mc->mc_sense);
2948 uc->CommandStatus = mc->mc_status;
2949 error = 0;
2950
2951 out:
2952 if (mc->mc_data != NULL)
2953 free(mc->mc_data, M_DEVBUF);
2954 MLY_LOCK(sc);
2955 mly_release_command(mc);
2956 MLY_UNLOCK(sc);
2957 return(error);
2958 }
2959
2960 /********************************************************************************
2961 * Return health status to userspace. If the health change index in the user
2962 * structure does not match that currently exported by the controller, we
2963 * return the current status immediately. Otherwise, we block until either
2964 * interrupted or new status is delivered.
2965 */
2966 static int
mly_user_health(struct mly_softc * sc,struct mly_user_health * uh)2967 mly_user_health(struct mly_softc *sc, struct mly_user_health *uh)
2968 {
2969 struct mly_health_status mh;
2970 int error;
2971
2972 /* fetch the current health status from userspace */
2973 if ((error = copyin(uh->HealthStatusBuffer, &mh, sizeof(mh))) != 0)
2974 return(error);
2975
2976 /* spin waiting for a status update */
2977 MLY_LOCK(sc);
2978 error = EWOULDBLOCK;
2979 while ((error != 0) && (sc->mly_event_change == mh.change_counter))
2980 error = mtx_sleep(&sc->mly_event_change, &sc->mly_lock, PRIBIO | PCATCH,
2981 "mlyhealth", 0);
2982 mh = sc->mly_mmbox->mmm_health.status;
2983 MLY_UNLOCK(sc);
2984
2985 /* copy the controller's health status buffer out */
2986 error = copyout(&mh, uh->HealthStatusBuffer, sizeof(mh));
2987 return(error);
2988 }
2989
2990 #ifdef MLY_DEBUG
2991 static void
mly_timeout(void * arg)2992 mly_timeout(void *arg)
2993 {
2994 struct mly_softc *sc;
2995 struct mly_command *mc;
2996 int deadline;
2997
2998 sc = arg;
2999 MLY_ASSERT_LOCKED(sc);
3000 deadline = time_second - MLY_CMD_TIMEOUT;
3001 TAILQ_FOREACH(mc, &sc->mly_busy, mc_link) {
3002 if ((mc->mc_timestamp < deadline)) {
3003 device_printf(sc->mly_dev,
3004 "COMMAND %p TIMEOUT AFTER %d SECONDS\n", mc,
3005 (int)(time_second - mc->mc_timestamp));
3006 }
3007 }
3008
3009 callout_reset(&sc->mly_timeout, MLY_CMD_TIMEOUT * hz, mly_timeout, sc);
3010 }
3011 #endif
3012