1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2000 Michael Smith
5 * Copyright (c) 2003 Paul Saab
6 * Copyright (c) 2003 Vinod Kashyap
7 * Copyright (c) 2000 BSDi
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
34
35 /*
36 * FreeBSD-specific code.
37 */
38
39 #include <dev/twe/twe_compat.h>
40 #include <dev/twe/twereg.h>
41 #include <dev/twe/tweio.h>
42 #include <dev/twe/twevar.h>
43 #include <dev/twe/twe_tables.h>
44
45 #include <vm/vm.h>
46
47 #ifdef TWE_DEBUG
48 static u_int32_t twed_bio_in;
49 #define TWED_BIO_IN twed_bio_in++
50 static u_int32_t twed_bio_out;
51 #define TWED_BIO_OUT twed_bio_out++
52 #else
53 #define TWED_BIO_IN
54 #define TWED_BIO_OUT
55 #endif
56
57 static void twe_setup_data_dmamap(void *arg, bus_dma_segment_t *segs, int nsegments, int error);
58 static void twe_setup_request_dmamap(void *arg, bus_dma_segment_t *segs, int nsegments, int error);
59
60 /********************************************************************************
61 ********************************************************************************
62 Control device interface
63 ********************************************************************************
64 ********************************************************************************/
65
66 static d_open_t twe_open;
67 static d_close_t twe_close;
68 static d_ioctl_t twe_ioctl_wrapper;
69
70 static struct cdevsw twe_cdevsw = {
71 .d_version = D_VERSION,
72 .d_open = twe_open,
73 .d_close = twe_close,
74 .d_ioctl = twe_ioctl_wrapper,
75 .d_name = "twe",
76 };
77
78 /********************************************************************************
79 * Accept an open operation on the control device.
80 */
81 static int
82 twe_open(struct cdev *dev, int flags, int fmt, struct thread *td)
83 {
84 struct twe_softc *sc = (struct twe_softc *)dev->si_drv1;
85
86 TWE_IO_LOCK(sc);
87 if (sc->twe_state & TWE_STATE_DETACHING) {
88 TWE_IO_UNLOCK(sc);
89 return (ENXIO);
90 }
91 sc->twe_state |= TWE_STATE_OPEN;
92 TWE_IO_UNLOCK(sc);
93 return(0);
94 }
95
96 /********************************************************************************
97 * Accept the last close on the control device.
98 */
99 static int
100 twe_close(struct cdev *dev, int flags, int fmt, struct thread *td)
101 {
102 struct twe_softc *sc = (struct twe_softc *)dev->si_drv1;
103
104 TWE_IO_LOCK(sc);
105 sc->twe_state &= ~TWE_STATE_OPEN;
106 TWE_IO_UNLOCK(sc);
107 return (0);
108 }
109
110 /********************************************************************************
111 * Handle controller-specific control operations.
112 */
113 static int
114 twe_ioctl_wrapper(struct cdev *dev, u_long cmd, caddr_t addr, int32_t flag, struct thread *td)
115 {
116 struct twe_softc *sc = (struct twe_softc *)dev->si_drv1;
117
118 return(twe_ioctl(sc, cmd, addr));
119 }
120
121 /********************************************************************************
122 ********************************************************************************
123 PCI device interface
124 ********************************************************************************
125 ********************************************************************************/
126
127 static int twe_probe(device_t dev);
128 static int twe_attach(device_t dev);
129 static void twe_free(struct twe_softc *sc);
130 static int twe_detach(device_t dev);
131 static int twe_shutdown(device_t dev);
132 static int twe_suspend(device_t dev);
133 static int twe_resume(device_t dev);
134 static void twe_pci_intr(void *arg);
135 static void twe_intrhook(void *arg);
136
137 static device_method_t twe_methods[] = {
138 /* Device interface */
139 DEVMETHOD(device_probe, twe_probe),
140 DEVMETHOD(device_attach, twe_attach),
141 DEVMETHOD(device_detach, twe_detach),
142 DEVMETHOD(device_shutdown, twe_shutdown),
143 DEVMETHOD(device_suspend, twe_suspend),
144 DEVMETHOD(device_resume, twe_resume),
145
146 DEVMETHOD_END
147 };
148
149 static driver_t twe_pci_driver = {
150 "twe",
151 twe_methods,
152 sizeof(struct twe_softc)
153 };
154
155 DRIVER_MODULE(twe, pci, twe_pci_driver, 0, 0);
156
157 /********************************************************************************
158 * Match a 3ware Escalade ATA RAID controller.
159 */
160 static int
161 twe_probe(device_t dev)
162 {
163
164 debug_called(4);
165
166 if ((pci_get_vendor(dev) == TWE_VENDOR_ID) &&
167 ((pci_get_device(dev) == TWE_DEVICE_ID) ||
168 (pci_get_device(dev) == TWE_DEVICE_ID_ASIC))) {
169 device_set_desc_copy(dev, TWE_DEVICE_NAME ". Driver version " TWE_DRIVER_VERSION_STRING);
170 return(BUS_PROBE_DEFAULT);
171 }
172 return(ENXIO);
173 }
174
175 /********************************************************************************
176 * Allocate resources, initialise the controller.
177 */
178 static int
179 twe_attach(device_t dev)
180 {
181 struct twe_softc *sc;
182 struct sysctl_oid *sysctl_tree;
183 int rid, error;
184
185 debug_called(4);
186
187 /*
188 * Initialise the softc structure.
189 */
190 sc = device_get_softc(dev);
191 sc->twe_dev = dev;
192 mtx_init(&sc->twe_io_lock, "twe I/O", NULL, MTX_DEF);
193 sx_init(&sc->twe_config_lock, "twe config");
194
195 /*
196 * XXX: This sysctl tree must stay at hw.tweX rather than using
197 * the device_get_sysctl_tree() created by new-bus because
198 * existing 3rd party binary tools such as tw_cli and 3dm2 use the
199 * existence of this sysctl node to discover controllers.
200 */
201 sysctl_tree = SYSCTL_ADD_NODE(device_get_sysctl_ctx(dev),
202 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
203 device_get_nameunit(dev), CTLFLAG_RD | CTLFLAG_MPSAFE, 0, "");
204 if (sysctl_tree == NULL) {
205 twe_printf(sc, "cannot add sysctl tree node\n");
206 return (ENXIO);
207 }
208 SYSCTL_ADD_STRING(device_get_sysctl_ctx(dev), SYSCTL_CHILDREN(sysctl_tree),
209 OID_AUTO, "driver_version", CTLFLAG_RD, TWE_DRIVER_VERSION_STRING, 0,
210 "TWE driver version");
211
212 /*
213 * Force the busmaster enable bit on, in case the BIOS forgot.
214 */
215 pci_enable_busmaster(dev);
216
217 /*
218 * Allocate the PCI register window.
219 */
220 rid = TWE_IO_CONFIG_REG;
221 if ((sc->twe_io = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid,
222 RF_ACTIVE)) == NULL) {
223 twe_printf(sc, "can't allocate register window\n");
224 twe_free(sc);
225 return(ENXIO);
226 }
227
228 /*
229 * Allocate the parent bus DMA tag appropriate for PCI.
230 */
231 if (bus_dma_tag_create(bus_get_dma_tag(dev), /* PCI parent */
232 1, 0, /* alignment, boundary */
233 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
234 BUS_SPACE_MAXADDR, /* highaddr */
235 NULL, NULL, /* filter, filterarg */
236 BUS_SPACE_MAXSIZE_32BIT, /* maxsize */
237 BUS_SPACE_UNRESTRICTED, /* nsegments */
238 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
239 0, /* flags */
240 NULL, /* lockfunc */
241 NULL, /* lockarg */
242 &sc->twe_parent_dmat)) {
243 twe_printf(sc, "can't allocate parent DMA tag\n");
244 twe_free(sc);
245 return(ENOMEM);
246 }
247
248 /*
249 * Allocate and connect our interrupt.
250 */
251 rid = 0;
252 if ((sc->twe_irq = bus_alloc_resource_any(sc->twe_dev, SYS_RES_IRQ,
253 &rid, RF_SHAREABLE | RF_ACTIVE)) == NULL) {
254 twe_printf(sc, "can't allocate interrupt\n");
255 twe_free(sc);
256 return(ENXIO);
257 }
258 if (bus_setup_intr(sc->twe_dev, sc->twe_irq, INTR_TYPE_BIO | INTR_ENTROPY | INTR_MPSAFE,
259 NULL, twe_pci_intr, sc, &sc->twe_intr)) {
260 twe_printf(sc, "can't set up interrupt\n");
261 twe_free(sc);
262 return(ENXIO);
263 }
264
265 /*
266 * Create DMA tag for mapping command's into controller-addressable space.
267 */
268 if (bus_dma_tag_create(sc->twe_parent_dmat, /* parent */
269 1, 0, /* alignment, boundary */
270 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
271 BUS_SPACE_MAXADDR, /* highaddr */
272 NULL, NULL, /* filter, filterarg */
273 sizeof(TWE_Command) *
274 TWE_Q_LENGTH, 1, /* maxsize, nsegments */
275 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
276 0, /* flags */
277 NULL, /* lockfunc */
278 NULL, /* lockarg */
279 &sc->twe_cmd_dmat)) {
280 twe_printf(sc, "can't allocate data buffer DMA tag\n");
281 twe_free(sc);
282 return(ENOMEM);
283 }
284 /*
285 * Allocate memory and make it available for DMA.
286 */
287 if (bus_dmamem_alloc(sc->twe_cmd_dmat, (void **)&sc->twe_cmd,
288 BUS_DMA_NOWAIT, &sc->twe_cmdmap)) {
289 twe_printf(sc, "can't allocate command memory\n");
290 return(ENOMEM);
291 }
292 bus_dmamap_load(sc->twe_cmd_dmat, sc->twe_cmdmap, sc->twe_cmd,
293 sizeof(TWE_Command) * TWE_Q_LENGTH,
294 twe_setup_request_dmamap, sc, 0);
295 bzero(sc->twe_cmd, sizeof(TWE_Command) * TWE_Q_LENGTH);
296
297 /*
298 * Create DMA tag for mapping objects into controller-addressable space.
299 */
300 if (bus_dma_tag_create(sc->twe_parent_dmat, /* parent */
301 1, 0, /* alignment, boundary */
302 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
303 BUS_SPACE_MAXADDR, /* highaddr */
304 NULL, NULL, /* filter, filterarg */
305 (TWE_MAX_SGL_LENGTH - 1) * PAGE_SIZE,/* maxsize */
306 TWE_MAX_SGL_LENGTH, /* nsegments */
307 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
308 BUS_DMA_ALLOCNOW, /* flags */
309 busdma_lock_mutex, /* lockfunc */
310 &sc->twe_io_lock, /* lockarg */
311 &sc->twe_buffer_dmat)) {
312 twe_printf(sc, "can't allocate data buffer DMA tag\n");
313 twe_free(sc);
314 return(ENOMEM);
315 }
316
317 /*
318 * Create DMA tag for mapping objects into controller-addressable space.
319 */
320 if (bus_dma_tag_create(sc->twe_parent_dmat, /* parent */
321 1, 0, /* alignment, boundary */
322 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
323 BUS_SPACE_MAXADDR, /* highaddr */
324 NULL, NULL, /* filter, filterarg */
325 DFLTPHYS, 1, /* maxsize, nsegments */
326 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
327 0, /* flags */
328 NULL, /* lockfunc */
329 NULL, /* lockarg */
330 &sc->twe_immediate_dmat)) {
331 twe_printf(sc, "can't allocate data buffer DMA tag\n");
332 twe_free(sc);
333 return(ENOMEM);
334 }
335 /*
336 * Allocate memory for requests which cannot sleep or support continuation.
337 */
338 if (bus_dmamem_alloc(sc->twe_immediate_dmat, (void **)&sc->twe_immediate,
339 BUS_DMA_NOWAIT, &sc->twe_immediate_map)) {
340 twe_printf(sc, "can't allocate memory for immediate requests\n");
341 return(ENOMEM);
342 }
343
344 /*
345 * Initialise the controller and driver core.
346 */
347 if ((error = twe_setup(sc))) {
348 twe_free(sc);
349 return(error);
350 }
351
352 /*
353 * Print some information about the controller and configuration.
354 */
355 twe_describe_controller(sc);
356
357 /*
358 * Create the control device.
359 */
360 sc->twe_dev_t = make_dev(&twe_cdevsw, device_get_unit(sc->twe_dev), UID_ROOT, GID_OPERATOR,
361 S_IRUSR | S_IWUSR, "twe%d", device_get_unit(sc->twe_dev));
362 sc->twe_dev_t->si_drv1 = sc;
363 /*
364 * Schedule ourselves to bring the controller up once interrupts are available.
365 * This isn't strictly necessary, since we disable interrupts while probing the
366 * controller, but it is more in keeping with common practice for other disk
367 * devices.
368 */
369 sc->twe_ich.ich_func = twe_intrhook;
370 sc->twe_ich.ich_arg = sc;
371 if (config_intrhook_establish(&sc->twe_ich) != 0) {
372 twe_printf(sc, "can't establish configuration hook\n");
373 twe_free(sc);
374 return(ENXIO);
375 }
376
377 return(0);
378 }
379
380 /********************************************************************************
381 * Free all of the resources associated with (sc).
382 *
383 * Should not be called if the controller is active.
384 */
385 static void
386 twe_free(struct twe_softc *sc)
387 {
388 struct twe_request *tr;
389
390 debug_called(4);
391
392 /* throw away any command buffers */
393 while ((tr = twe_dequeue_free(sc)) != NULL)
394 twe_free_request(tr);
395
396 if (sc->twe_cmd != NULL) {
397 bus_dmamap_unload(sc->twe_cmd_dmat, sc->twe_cmdmap);
398 bus_dmamem_free(sc->twe_cmd_dmat, sc->twe_cmd, sc->twe_cmdmap);
399 }
400
401 if (sc->twe_immediate != NULL) {
402 bus_dmamap_unload(sc->twe_immediate_dmat, sc->twe_immediate_map);
403 bus_dmamem_free(sc->twe_immediate_dmat, sc->twe_immediate,
404 sc->twe_immediate_map);
405 }
406
407 if (sc->twe_immediate_dmat)
408 bus_dma_tag_destroy(sc->twe_immediate_dmat);
409
410 /* destroy the data-transfer DMA tag */
411 if (sc->twe_buffer_dmat)
412 bus_dma_tag_destroy(sc->twe_buffer_dmat);
413
414 /* disconnect the interrupt handler */
415 if (sc->twe_intr)
416 bus_teardown_intr(sc->twe_dev, sc->twe_irq, sc->twe_intr);
417 if (sc->twe_irq != NULL)
418 bus_release_resource(sc->twe_dev, SYS_RES_IRQ, 0, sc->twe_irq);
419
420 /* destroy the parent DMA tag */
421 if (sc->twe_parent_dmat)
422 bus_dma_tag_destroy(sc->twe_parent_dmat);
423
424 /* release the register window mapping */
425 if (sc->twe_io != NULL)
426 bus_release_resource(sc->twe_dev, SYS_RES_IOPORT, TWE_IO_CONFIG_REG, sc->twe_io);
427
428 /* destroy control device */
429 if (sc->twe_dev_t != (struct cdev *)NULL)
430 destroy_dev(sc->twe_dev_t);
431
432 sx_destroy(&sc->twe_config_lock);
433 mtx_destroy(&sc->twe_io_lock);
434 }
435
436 /********************************************************************************
437 * Disconnect from the controller completely, in preparation for unload.
438 */
439 static int
440 twe_detach(device_t dev)
441 {
442 struct twe_softc *sc = device_get_softc(dev);
443
444 debug_called(4);
445
446 TWE_IO_LOCK(sc);
447 if (sc->twe_state & TWE_STATE_OPEN) {
448 TWE_IO_UNLOCK(sc);
449 return (EBUSY);
450 }
451 sc->twe_state |= TWE_STATE_DETACHING;
452 TWE_IO_UNLOCK(sc);
453
454 /*
455 * Shut the controller down.
456 */
457 if (twe_shutdown(dev)) {
458 TWE_IO_LOCK(sc);
459 sc->twe_state &= ~TWE_STATE_DETACHING;
460 TWE_IO_UNLOCK(sc);
461 return (EBUSY);
462 }
463
464 twe_free(sc);
465
466 return(0);
467 }
468
469 /********************************************************************************
470 * Bring the controller down to a dormant state and detach all child devices.
471 *
472 * Note that we can assume that the bioq on the controller is empty, as we won't
473 * allow shutdown if any device is open.
474 */
475 static int
476 twe_shutdown(device_t dev)
477 {
478 struct twe_softc *sc = device_get_softc(dev);
479 int i, error = 0;
480
481 debug_called(4);
482
483 /*
484 * Delete all our child devices.
485 */
486 TWE_CONFIG_LOCK(sc);
487 for (i = 0; i < TWE_MAX_UNITS; i++) {
488 if (sc->twe_drive[i].td_disk != 0) {
489 if ((error = twe_detach_drive(sc, i)) != 0) {
490 TWE_CONFIG_UNLOCK(sc);
491 return (error);
492 }
493 }
494 }
495 TWE_CONFIG_UNLOCK(sc);
496
497 /*
498 * Bring the controller down.
499 */
500 TWE_IO_LOCK(sc);
501 twe_deinit(sc);
502 TWE_IO_UNLOCK(sc);
503
504 return(0);
505 }
506
507 /********************************************************************************
508 * Bring the controller to a quiescent state, ready for system suspend.
509 */
510 static int
511 twe_suspend(device_t dev)
512 {
513 struct twe_softc *sc = device_get_softc(dev);
514
515 debug_called(4);
516
517 TWE_IO_LOCK(sc);
518 sc->twe_state |= TWE_STATE_SUSPEND;
519
520 twe_disable_interrupts(sc);
521 TWE_IO_UNLOCK(sc);
522
523 return(0);
524 }
525
526 /********************************************************************************
527 * Bring the controller back to a state ready for operation.
528 */
529 static int
530 twe_resume(device_t dev)
531 {
532 struct twe_softc *sc = device_get_softc(dev);
533
534 debug_called(4);
535
536 TWE_IO_LOCK(sc);
537 sc->twe_state &= ~TWE_STATE_SUSPEND;
538 twe_enable_interrupts(sc);
539 TWE_IO_UNLOCK(sc);
540
541 return(0);
542 }
543
544 /*******************************************************************************
545 * Take an interrupt, or be poked by other code to look for interrupt-worthy
546 * status.
547 */
548 static void
549 twe_pci_intr(void *arg)
550 {
551 struct twe_softc *sc = arg;
552
553 TWE_IO_LOCK(sc);
554 twe_intr(sc);
555 TWE_IO_UNLOCK(sc);
556 }
557
558 /********************************************************************************
559 * Delayed-startup hook
560 */
561 static void
562 twe_intrhook(void *arg)
563 {
564 struct twe_softc *sc = (struct twe_softc *)arg;
565
566 /* pull ourselves off the intrhook chain */
567 config_intrhook_disestablish(&sc->twe_ich);
568
569 /* call core startup routine */
570 twe_init(sc);
571 }
572
573 /********************************************************************************
574 * Given a detected drive, attach it to the bio interface.
575 *
576 * This is called from twe_add_unit.
577 */
578 int
579 twe_attach_drive(struct twe_softc *sc, struct twe_drive *dr)
580 {
581 char buf[80];
582 int error;
583
584 bus_topo_lock();
585 dr->td_disk = device_add_child(sc->twe_dev, NULL, -1);
586 if (dr->td_disk == NULL) {
587 bus_topo_unlock();
588 twe_printf(sc, "Cannot add unit\n");
589 return (EIO);
590 }
591 device_set_ivars(dr->td_disk, dr);
592
593 /*
594 * XXX It would make sense to test the online/initialising bits, but they seem to be
595 * always set...
596 */
597 sprintf(buf, "Unit %d, %s, %s",
598 dr->td_twe_unit,
599 twe_describe_code(twe_table_unittype, dr->td_type),
600 twe_describe_code(twe_table_unitstate, dr->td_state & TWE_PARAM_UNITSTATUS_MASK));
601 device_set_desc_copy(dr->td_disk, buf);
602
603 error = device_probe_and_attach(dr->td_disk);
604 bus_topo_unlock();
605 if (error != 0) {
606 twe_printf(sc, "Cannot attach unit to controller. error = %d\n", error);
607 return (EIO);
608 }
609 return (0);
610 }
611
612 /********************************************************************************
613 * Detach the specified unit if it exsists
614 *
615 * This is called from twe_del_unit.
616 */
617 int
618 twe_detach_drive(struct twe_softc *sc, int unit)
619 {
620 int error = 0;
621
622 TWE_CONFIG_ASSERT_LOCKED(sc);
623 bus_topo_lock();
624 error = device_delete_child(sc->twe_dev, sc->twe_drive[unit].td_disk);
625 bus_topo_unlock();
626 if (error != 0) {
627 twe_printf(sc, "failed to delete unit %d\n", unit);
628 return(error);
629 }
630 bzero(&sc->twe_drive[unit], sizeof(sc->twe_drive[unit]));
631 return(error);
632 }
633
634 /********************************************************************************
635 * Clear a PCI parity error.
636 */
637 void
638 twe_clear_pci_parity_error(struct twe_softc *sc)
639 {
640 TWE_CONTROL(sc, TWE_CONTROL_CLEAR_PARITY_ERROR);
641 pci_write_config(sc->twe_dev, PCIR_STATUS, TWE_PCI_CLEAR_PARITY_ERROR, 2);
642 }
643
644 /********************************************************************************
645 * Clear a PCI abort.
646 */
647 void
648 twe_clear_pci_abort(struct twe_softc *sc)
649 {
650 TWE_CONTROL(sc, TWE_CONTROL_CLEAR_PCI_ABORT);
651 pci_write_config(sc->twe_dev, PCIR_STATUS, TWE_PCI_CLEAR_PCI_ABORT, 2);
652 }
653
654 /********************************************************************************
655 ********************************************************************************
656 Disk device
657 ********************************************************************************
658 ********************************************************************************/
659
660 /*
661 * Disk device softc
662 */
663 struct twed_softc
664 {
665 device_t twed_dev;
666 struct twe_softc *twed_controller; /* parent device softc */
667 struct twe_drive *twed_drive; /* drive data in parent softc */
668 struct disk *twed_disk; /* generic disk handle */
669 };
670
671 /*
672 * Disk device bus interface
673 */
674 static int twed_probe(device_t dev);
675 static int twed_attach(device_t dev);
676 static int twed_detach(device_t dev);
677
678 static device_method_t twed_methods[] = {
679 DEVMETHOD(device_probe, twed_probe),
680 DEVMETHOD(device_attach, twed_attach),
681 DEVMETHOD(device_detach, twed_detach),
682 { 0, 0 }
683 };
684
685 static driver_t twed_driver = {
686 "twed",
687 twed_methods,
688 sizeof(struct twed_softc)
689 };
690
691 DRIVER_MODULE(twed, twe, twed_driver, 0, 0);
692
693 /*
694 * Disk device control interface.
695 */
696
697 /********************************************************************************
698 * Handle open from generic layer.
699 *
700 * Note that this is typically only called by the diskslice code, and not
701 * for opens on subdevices (eg. slices, partitions).
702 */
703 static int
704 twed_open(struct disk *dp)
705 {
706 struct twed_softc *sc = (struct twed_softc *)dp->d_drv1;
707
708 debug_called(4);
709
710 if (sc == NULL)
711 return (ENXIO);
712
713 /* check that the controller is up and running */
714 if (sc->twed_controller->twe_state & TWE_STATE_SHUTDOWN)
715 return(ENXIO);
716
717 return (0);
718 }
719
720 /********************************************************************************
721 * Handle an I/O request.
722 */
723 static void
724 twed_strategy(struct bio *bp)
725 {
726 struct twed_softc *sc = bp->bio_disk->d_drv1;
727
728 debug_called(4);
729
730 bp->bio_driver1 = &sc->twed_drive->td_twe_unit;
731 TWED_BIO_IN;
732
733 /* bogus disk? */
734 if (sc == NULL || sc->twed_drive->td_disk == NULL) {
735 bp->bio_error = EINVAL;
736 bp->bio_flags |= BIO_ERROR;
737 printf("twe: bio for invalid disk!\n");
738 biodone(bp);
739 TWED_BIO_OUT;
740 return;
741 }
742
743 /* queue the bio on the controller */
744 TWE_IO_LOCK(sc->twed_controller);
745 twe_enqueue_bio(sc->twed_controller, bp);
746
747 /* poke the controller to start I/O */
748 twe_startio(sc->twed_controller);
749 TWE_IO_UNLOCK(sc->twed_controller);
750 return;
751 }
752
753 /********************************************************************************
754 * System crashdump support
755 */
756 static int
757 twed_dump(void *arg, void *virtual, vm_offset_t physical, off_t offset, size_t length)
758 {
759 struct twed_softc *twed_sc;
760 struct twe_softc *twe_sc;
761 int error;
762 struct disk *dp;
763
764 dp = arg;
765 twed_sc = (struct twed_softc *)dp->d_drv1;
766 if (twed_sc == NULL)
767 return(ENXIO);
768 twe_sc = (struct twe_softc *)twed_sc->twed_controller;
769
770 if (length > 0) {
771 if ((error = twe_dump_blocks(twe_sc, twed_sc->twed_drive->td_twe_unit, offset / TWE_BLOCK_SIZE, virtual, length / TWE_BLOCK_SIZE)) != 0)
772 return(error);
773 }
774 return(0);
775 }
776
777 /********************************************************************************
778 * Handle completion of an I/O request.
779 */
780 void
781 twed_intr(struct bio *bp)
782 {
783 debug_called(4);
784
785 /* if no error, transfer completed */
786 if (!(bp->bio_flags & BIO_ERROR))
787 bp->bio_resid = 0;
788
789 biodone(bp);
790 TWED_BIO_OUT;
791 }
792
793 /********************************************************************************
794 * Default probe stub.
795 */
796 static int
797 twed_probe(device_t dev)
798 {
799 return (0);
800 }
801
802 /********************************************************************************
803 * Attach a unit to the controller.
804 */
805 static int
806 twed_attach(device_t dev)
807 {
808 struct twed_softc *sc;
809 device_t parent;
810
811 debug_called(4);
812
813 /* initialise our softc */
814 sc = device_get_softc(dev);
815 parent = device_get_parent(dev);
816 sc->twed_controller = (struct twe_softc *)device_get_softc(parent);
817 sc->twed_drive = device_get_ivars(dev);
818 sc->twed_dev = dev;
819
820 /* report the drive */
821 twed_printf(sc, "%uMB (%u sectors)\n",
822 sc->twed_drive->td_size / ((1024 * 1024) / TWE_BLOCK_SIZE),
823 sc->twed_drive->td_size);
824
825 /* attach a generic disk device to ourselves */
826
827 sc->twed_drive->td_sys_unit = device_get_unit(dev);
828
829 sc->twed_disk = disk_alloc();
830 sc->twed_disk->d_open = twed_open;
831 sc->twed_disk->d_strategy = twed_strategy;
832 sc->twed_disk->d_dump = (dumper_t *)twed_dump;
833 sc->twed_disk->d_name = "twed";
834 sc->twed_disk->d_drv1 = sc;
835 sc->twed_disk->d_maxsize = (TWE_MAX_SGL_LENGTH - 1) * PAGE_SIZE;
836 sc->twed_disk->d_sectorsize = TWE_BLOCK_SIZE;
837 sc->twed_disk->d_mediasize = TWE_BLOCK_SIZE * (off_t)sc->twed_drive->td_size;
838 if (sc->twed_drive->td_type == TWE_UD_CONFIG_RAID0 ||
839 sc->twed_drive->td_type == TWE_UD_CONFIG_RAID5 ||
840 sc->twed_drive->td_type == TWE_UD_CONFIG_RAID10) {
841 sc->twed_disk->d_stripesize =
842 TWE_BLOCK_SIZE << sc->twed_drive->td_stripe;
843 sc->twed_disk->d_stripeoffset = 0;
844 }
845 sc->twed_disk->d_fwsectors = sc->twed_drive->td_sectors;
846 sc->twed_disk->d_fwheads = sc->twed_drive->td_heads;
847 sc->twed_disk->d_unit = sc->twed_drive->td_sys_unit;
848
849 disk_create(sc->twed_disk, DISK_VERSION);
850
851 /* set the maximum I/O size to the theoretical maximum allowed by the S/G list size */
852
853 return (0);
854 }
855
856 /********************************************************************************
857 * Disconnect ourselves from the system.
858 */
859 static int
860 twed_detach(device_t dev)
861 {
862 struct twed_softc *sc = (struct twed_softc *)device_get_softc(dev);
863
864 debug_called(4);
865
866 if (sc->twed_disk->d_flags & DISKFLAG_OPEN)
867 return(EBUSY);
868
869 disk_destroy(sc->twed_disk);
870
871 return(0);
872 }
873
874 /********************************************************************************
875 ********************************************************************************
876 Misc
877 ********************************************************************************
878 ********************************************************************************/
879
880 /********************************************************************************
881 * Allocate a command buffer
882 */
883 static MALLOC_DEFINE(TWE_MALLOC_CLASS, "twe_commands", "twe commands");
884
885 struct twe_request *
886 twe_allocate_request(struct twe_softc *sc, int tag)
887 {
888 struct twe_request *tr;
889
890 tr = malloc(sizeof(struct twe_request), TWE_MALLOC_CLASS, M_WAITOK | M_ZERO);
891 tr->tr_sc = sc;
892 tr->tr_tag = tag;
893 if (bus_dmamap_create(sc->twe_buffer_dmat, 0, &tr->tr_dmamap)) {
894 twe_free_request(tr);
895 twe_printf(sc, "unable to allocate dmamap for tag %d\n", tag);
896 return(NULL);
897 }
898 return(tr);
899 }
900
901 /********************************************************************************
902 * Permanently discard a command buffer.
903 */
904 void
905 twe_free_request(struct twe_request *tr)
906 {
907 struct twe_softc *sc = tr->tr_sc;
908
909 debug_called(4);
910
911 bus_dmamap_destroy(sc->twe_buffer_dmat, tr->tr_dmamap);
912 free(tr, TWE_MALLOC_CLASS);
913 }
914
915 /********************************************************************************
916 * Map/unmap (tr)'s command and data in the controller's addressable space.
917 *
918 * These routines ensure that the data which the controller is going to try to
919 * access is actually visible to the controller, in a machine-independent
920 * fashion. Due to a hardware limitation, I/O buffers must be 512-byte aligned
921 * and we take care of that here as well.
922 */
923 static void
924 twe_fillin_sgl(TWE_SG_Entry *sgl, bus_dma_segment_t *segs, int nsegments, int max_sgl)
925 {
926 int i;
927
928 for (i = 0; i < nsegments; i++) {
929 sgl[i].address = segs[i].ds_addr;
930 sgl[i].length = segs[i].ds_len;
931 }
932 for (; i < max_sgl; i++) { /* XXX necessary? */
933 sgl[i].address = 0;
934 sgl[i].length = 0;
935 }
936 }
937
938 static void
939 twe_setup_data_dmamap(void *arg, bus_dma_segment_t *segs, int nsegments, int error)
940 {
941 struct twe_request *tr = (struct twe_request *)arg;
942 struct twe_softc *sc = tr->tr_sc;
943 TWE_Command *cmd = TWE_FIND_COMMAND(tr);
944
945 debug_called(4);
946
947 if (tr->tr_flags & TWE_CMD_MAPPED)
948 panic("already mapped command");
949
950 tr->tr_flags |= TWE_CMD_MAPPED;
951
952 if (tr->tr_flags & TWE_CMD_IN_PROGRESS)
953 sc->twe_state &= ~TWE_STATE_FRZN;
954 /* save base of first segment in command (applicable if there only one segment) */
955 tr->tr_dataphys = segs[0].ds_addr;
956
957 /* correct command size for s/g list size */
958 cmd->generic.size += 2 * nsegments;
959
960 /*
961 * Due to the fact that parameter and I/O commands have the scatter/gather list in
962 * different places, we need to determine which sort of command this actually is
963 * before we can populate it correctly.
964 */
965 switch(cmd->generic.opcode) {
966 case TWE_OP_GET_PARAM:
967 case TWE_OP_SET_PARAM:
968 cmd->generic.sgl_offset = 2;
969 twe_fillin_sgl(&cmd->param.sgl[0], segs, nsegments, TWE_MAX_SGL_LENGTH);
970 break;
971 case TWE_OP_READ:
972 case TWE_OP_WRITE:
973 cmd->generic.sgl_offset = 3;
974 twe_fillin_sgl(&cmd->io.sgl[0], segs, nsegments, TWE_MAX_SGL_LENGTH);
975 break;
976 case TWE_OP_ATA_PASSTHROUGH:
977 cmd->generic.sgl_offset = 5;
978 twe_fillin_sgl(&cmd->ata.sgl[0], segs, nsegments, TWE_MAX_ATA_SGL_LENGTH);
979 break;
980 default:
981 /*
982 * Fall back to what the linux driver does.
983 * Do this because the API may send an opcode
984 * the driver knows nothing about and this will
985 * at least stop PCIABRT's from hosing us.
986 */
987 switch (cmd->generic.sgl_offset) {
988 case 2:
989 twe_fillin_sgl(&cmd->param.sgl[0], segs, nsegments, TWE_MAX_SGL_LENGTH);
990 break;
991 case 3:
992 twe_fillin_sgl(&cmd->io.sgl[0], segs, nsegments, TWE_MAX_SGL_LENGTH);
993 break;
994 case 5:
995 twe_fillin_sgl(&cmd->ata.sgl[0], segs, nsegments, TWE_MAX_ATA_SGL_LENGTH);
996 break;
997 }
998 }
999
1000 if (tr->tr_flags & TWE_CMD_DATAIN) {
1001 if (tr->tr_flags & TWE_CMD_IMMEDIATE) {
1002 bus_dmamap_sync(sc->twe_immediate_dmat, sc->twe_immediate_map,
1003 BUS_DMASYNC_PREREAD);
1004 } else {
1005 bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_dmamap,
1006 BUS_DMASYNC_PREREAD);
1007 }
1008 }
1009
1010 if (tr->tr_flags & TWE_CMD_DATAOUT) {
1011 /*
1012 * if we're using an alignment buffer, and we're writing data
1013 * copy the real data out
1014 */
1015 if (tr->tr_flags & TWE_CMD_ALIGNBUF)
1016 bcopy(tr->tr_realdata, tr->tr_data, tr->tr_length);
1017
1018 if (tr->tr_flags & TWE_CMD_IMMEDIATE) {
1019 bus_dmamap_sync(sc->twe_immediate_dmat, sc->twe_immediate_map,
1020 BUS_DMASYNC_PREWRITE);
1021 } else {
1022 bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_dmamap,
1023 BUS_DMASYNC_PREWRITE);
1024 }
1025 }
1026
1027 if (twe_start(tr) == EBUSY) {
1028 tr->tr_sc->twe_state |= TWE_STATE_CTLR_BUSY;
1029 twe_requeue_ready(tr);
1030 }
1031 }
1032
1033 static void
1034 twe_setup_request_dmamap(void *arg, bus_dma_segment_t *segs, int nsegments, int error)
1035 {
1036 struct twe_softc *sc = (struct twe_softc *)arg;
1037
1038 debug_called(4);
1039
1040 /* command can't cross a page boundary */
1041 sc->twe_cmdphys = segs[0].ds_addr;
1042 }
1043
1044 int
1045 twe_map_request(struct twe_request *tr)
1046 {
1047 struct twe_softc *sc = tr->tr_sc;
1048 int error = 0;
1049
1050 debug_called(4);
1051
1052 if (!dumping)
1053 TWE_IO_ASSERT_LOCKED(sc);
1054 if (sc->twe_state & (TWE_STATE_CTLR_BUSY | TWE_STATE_FRZN)) {
1055 twe_requeue_ready(tr);
1056 return (EBUSY);
1057 }
1058
1059 bus_dmamap_sync(sc->twe_cmd_dmat, sc->twe_cmdmap, BUS_DMASYNC_PREWRITE);
1060
1061 /*
1062 * If the command involves data, map that too.
1063 */
1064 if (tr->tr_data != NULL && ((tr->tr_flags & TWE_CMD_MAPPED) == 0)) {
1065 /*
1066 * Data must be 64-byte aligned; allocate a fixup buffer if it's not.
1067 */
1068 if (((vm_offset_t)tr->tr_data % TWE_ALIGNMENT) != 0) {
1069 tr->tr_realdata = tr->tr_data; /* save pointer to 'real' data */
1070 tr->tr_flags |= TWE_CMD_ALIGNBUF;
1071 tr->tr_data = malloc(tr->tr_length, TWE_MALLOC_CLASS, M_NOWAIT);
1072 if (tr->tr_data == NULL) {
1073 twe_printf(sc, "%s: malloc failed\n", __func__);
1074 tr->tr_data = tr->tr_realdata; /* restore original data pointer */
1075 return(ENOMEM);
1076 }
1077 }
1078
1079 /*
1080 * Map the data buffer into bus space and build the s/g list.
1081 */
1082 if (tr->tr_flags & TWE_CMD_IMMEDIATE) {
1083 error = bus_dmamap_load(sc->twe_immediate_dmat, sc->twe_immediate_map, sc->twe_immediate,
1084 tr->tr_length, twe_setup_data_dmamap, tr, BUS_DMA_NOWAIT);
1085 } else {
1086 error = bus_dmamap_load(sc->twe_buffer_dmat, tr->tr_dmamap, tr->tr_data, tr->tr_length,
1087 twe_setup_data_dmamap, tr, 0);
1088 }
1089 if (error == EINPROGRESS) {
1090 tr->tr_flags |= TWE_CMD_IN_PROGRESS;
1091 sc->twe_state |= TWE_STATE_FRZN;
1092 error = 0;
1093 }
1094 } else
1095 if ((error = twe_start(tr)) == EBUSY) {
1096 sc->twe_state |= TWE_STATE_CTLR_BUSY;
1097 twe_requeue_ready(tr);
1098 }
1099
1100 return(error);
1101 }
1102
1103 void
1104 twe_unmap_request(struct twe_request *tr)
1105 {
1106 struct twe_softc *sc = tr->tr_sc;
1107
1108 debug_called(4);
1109
1110 if (!dumping)
1111 TWE_IO_ASSERT_LOCKED(sc);
1112 bus_dmamap_sync(sc->twe_cmd_dmat, sc->twe_cmdmap, BUS_DMASYNC_POSTWRITE);
1113
1114 /*
1115 * If the command involved data, unmap that too.
1116 */
1117 if (tr->tr_data != NULL) {
1118 if (tr->tr_flags & TWE_CMD_DATAIN) {
1119 if (tr->tr_flags & TWE_CMD_IMMEDIATE) {
1120 bus_dmamap_sync(sc->twe_immediate_dmat, sc->twe_immediate_map,
1121 BUS_DMASYNC_POSTREAD);
1122 } else {
1123 bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_dmamap,
1124 BUS_DMASYNC_POSTREAD);
1125 }
1126
1127 /* if we're using an alignment buffer, and we're reading data, copy the real data in */
1128 if (tr->tr_flags & TWE_CMD_ALIGNBUF)
1129 bcopy(tr->tr_data, tr->tr_realdata, tr->tr_length);
1130 }
1131 if (tr->tr_flags & TWE_CMD_DATAOUT) {
1132 if (tr->tr_flags & TWE_CMD_IMMEDIATE) {
1133 bus_dmamap_sync(sc->twe_immediate_dmat, sc->twe_immediate_map,
1134 BUS_DMASYNC_POSTWRITE);
1135 } else {
1136 bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_dmamap,
1137 BUS_DMASYNC_POSTWRITE);
1138 }
1139 }
1140
1141 if (tr->tr_flags & TWE_CMD_IMMEDIATE) {
1142 bus_dmamap_unload(sc->twe_immediate_dmat, sc->twe_immediate_map);
1143 } else {
1144 bus_dmamap_unload(sc->twe_buffer_dmat, tr->tr_dmamap);
1145 }
1146 }
1147
1148 /* free alignment buffer if it was used */
1149 if (tr->tr_flags & TWE_CMD_ALIGNBUF) {
1150 free(tr->tr_data, TWE_MALLOC_CLASS);
1151 tr->tr_data = tr->tr_realdata; /* restore 'real' data pointer */
1152 }
1153 }
1154
1155 #ifdef TWE_DEBUG
1156 void twe_report(void);
1157 /********************************************************************************
1158 * Print current controller status, call from DDB.
1159 */
1160 void
1161 twe_report(void)
1162 {
1163 struct twe_softc *sc;
1164 int i;
1165
1166 for (i = 0; (sc = devclass_get_softc(devclass_find("twe"), i)) != NULL; i++)
1167 twe_print_controller(sc);
1168 printf("twed: total bio count in %u out %u\n", twed_bio_in, twed_bio_out);
1169 }
1170 #endif
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