DEVFS - remove dev_ops_add(), dev_ops_get(), and get_dev()
[dragonfly.git] / sys / dev / raid / mly / mly.c
CommitLineData
984263bc
MD
1/*-
2 * Copyright (c) 2000, 2001 Michael Smith
3 * Copyright (c) 2000 BSDi
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * $FreeBSD: src/sys/dev/mly/mly.c,v 1.3.2.3 2001/03/05 20:17:24 msmith Exp $
1c8b7a9a 28 * $DragonFly: src/sys/dev/raid/mly/mly.c,v 1.21 2008/05/18 20:30:23 pavalos Exp $
984263bc
MD
29 */
30
31#include <sys/param.h>
32#include <sys/systm.h>
33#include <sys/malloc.h>
34#include <sys/kernel.h>
35#include <sys/bus.h>
36#include <sys/conf.h>
fef8985e 37#include <sys/device.h>
984263bc 38#include <sys/ctype.h>
984263bc 39#include <sys/stat.h>
984263bc 40#include <sys/rman.h>
5eb77fd5 41#include <sys/thread2.h>
984263bc 42
51997c37
PA
43#include <bus/cam/cam.h>
44#include <bus/cam/cam_ccb.h>
45#include <bus/cam/cam_periph.h>
46#include <bus/cam/cam_sim.h>
47#include <bus/cam/cam_xpt_sim.h>
1f2de5d4 48#include <bus/cam/scsi/scsi_all.h>
51997c37
PA
49#include <bus/cam/scsi/scsi_message.h>
50
51#include <bus/pci/pcireg.h>
52#include <bus/pci/pcivar.h>
984263bc 53
1f2de5d4
MD
54#include "mlyreg.h"
55#include "mlyio.h"
56#include "mlyvar.h"
1f2de5d4 57#include "mly_tables.h"
984263bc 58
51997c37
PA
59static int mly_probe(device_t dev);
60static int mly_attach(device_t dev);
61static int mly_pci_attach(struct mly_softc *sc);
62static int mly_detach(device_t dev);
63static int mly_shutdown(device_t dev);
64static void mly_intr(void *arg);
65
66static int mly_sg_map(struct mly_softc *sc);
67static void mly_sg_map_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error);
68static int mly_mmbox_map(struct mly_softc *sc);
69static void mly_mmbox_map_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error);
70static void mly_free(struct mly_softc *sc);
71
984263bc
MD
72static int mly_get_controllerinfo(struct mly_softc *sc);
73static void mly_scan_devices(struct mly_softc *sc);
74static void mly_rescan_btl(struct mly_softc *sc, int bus, int target);
75static void mly_complete_rescan(struct mly_command *mc);
76static int mly_get_eventstatus(struct mly_softc *sc);
77static int mly_enable_mmbox(struct mly_softc *sc);
78static int mly_flush(struct mly_softc *sc);
79static int mly_ioctl(struct mly_softc *sc, struct mly_command_ioctl *ioctl, void **data,
80 size_t datasize, u_int8_t *status, void *sense_buffer, size_t *sense_length);
51997c37 81static void mly_check_event(struct mly_softc *sc);
984263bc
MD
82static void mly_fetch_event(struct mly_softc *sc);
83static void mly_complete_event(struct mly_command *mc);
84static void mly_process_event(struct mly_softc *sc, struct mly_event *me);
85static void mly_periodic(void *data);
86
87static int mly_immediate_command(struct mly_command *mc);
88static int mly_start(struct mly_command *mc);
51997c37 89static void mly_done(struct mly_softc *sc);
984263bc
MD
90static void mly_complete(void *context, int pending);
91
51997c37
PA
92static int mly_alloc_command(struct mly_softc *sc, struct mly_command **mcp);
93static void mly_release_command(struct mly_command *mc);
984263bc
MD
94static void mly_alloc_commands_map(void *arg, bus_dma_segment_t *segs, int nseg, int error);
95static int mly_alloc_commands(struct mly_softc *sc);
51997c37 96static void mly_release_commands(struct mly_softc *sc);
984263bc
MD
97static void mly_map_command(struct mly_command *mc);
98static void mly_unmap_command(struct mly_command *mc);
99
51997c37
PA
100static int mly_cam_attach(struct mly_softc *sc);
101static void mly_cam_detach(struct mly_softc *sc);
102static void mly_cam_rescan_btl(struct mly_softc *sc, int bus, int target);
103static void mly_cam_rescan_callback(struct cam_periph *periph, union ccb *ccb);
104static void mly_cam_action(struct cam_sim *sim, union ccb *ccb);
105static int mly_cam_action_io(struct cam_sim *sim, struct ccb_scsiio *csio);
106static void mly_cam_poll(struct cam_sim *sim);
107static void mly_cam_complete(struct mly_command *mc);
108static struct cam_periph *mly_find_periph(struct mly_softc *sc, int bus, int target);
109static int mly_name_device(struct mly_softc *sc, int bus, int target);
110
984263bc
MD
111static int mly_fwhandshake(struct mly_softc *sc);
112
113static void mly_describe_controller(struct mly_softc *sc);
114#ifdef MLY_DEBUG
115static void mly_printstate(struct mly_softc *sc);
116static void mly_print_command(struct mly_command *mc);
117static void mly_print_packet(struct mly_command *mc);
118static void mly_panic(struct mly_softc *sc, char *reason);
119#endif
120void mly_print_controller(int controller);
51997c37
PA
121static int mly_timeout(struct mly_softc *sc);
122
984263bc
MD
123
124static d_open_t mly_user_open;
125static d_close_t mly_user_close;
126static d_ioctl_t mly_user_ioctl;
127static int mly_user_command(struct mly_softc *sc, struct mly_user_command *uc);
128static int mly_user_health(struct mly_softc *sc, struct mly_user_health *uh);
129
51997c37
PA
130#define MLY_CMD_TIMEOUT 20
131
132static device_method_t mly_methods[] = {
133 /* Device interface */
134 DEVMETHOD(device_probe, mly_probe),
135 DEVMETHOD(device_attach, mly_attach),
136 DEVMETHOD(device_detach, mly_detach),
137 DEVMETHOD(device_shutdown, mly_shutdown),
138 { 0, 0 }
139};
140
141static driver_t mly_pci_driver = {
142 "mly",
143 mly_methods,
144 sizeof(struct mly_softc)
145};
146
147static devclass_t mly_devclass;
148DRIVER_MODULE(mly, pci, mly_pci_driver, mly_devclass, 0, 0);
149
984263bc
MD
150#define MLY_CDEV_MAJOR 158
151
fef8985e
MD
152static struct dev_ops mly_ops = {
153 { "mly", MLY_CDEV_MAJOR, 0 },
154 .d_open = mly_user_open,
155 .d_close = mly_user_close,
156 .d_ioctl = mly_user_ioctl,
984263bc
MD
157};
158
159/********************************************************************************
160 ********************************************************************************
161 Device Interface
162 ********************************************************************************
163 ********************************************************************************/
164
51997c37
PA
165static struct mly_ident
166{
167 u_int16_t vendor;
168 u_int16_t device;
169 u_int16_t subvendor;
170 u_int16_t subdevice;
171 int hwif;
172 char *desc;
173} mly_identifiers[] = {
174 {0x1069, 0xba56, 0x1069, 0x0040, MLY_HWIF_STRONGARM, "Mylex eXtremeRAID 2000"},
175 {0x1069, 0xba56, 0x1069, 0x0030, MLY_HWIF_STRONGARM, "Mylex eXtremeRAID 3000"},
176 {0x1069, 0x0050, 0x1069, 0x0050, MLY_HWIF_I960RX, "Mylex AcceleRAID 352"},
177 {0x1069, 0x0050, 0x1069, 0x0052, MLY_HWIF_I960RX, "Mylex AcceleRAID 170"},
178 {0x1069, 0x0050, 0x1069, 0x0054, MLY_HWIF_I960RX, "Mylex AcceleRAID 160"},
179 {0, 0, 0, 0, 0, 0}
180};
181
182/********************************************************************************
183 * Compare the provided PCI device with the list we support.
184 */
185static int
186mly_probe(device_t dev)
187{
188 struct mly_ident *m;
189
190 debug_called(1);
191
192 for (m = mly_identifiers; m->vendor != 0; m++) {
193 if ((m->vendor == pci_get_vendor(dev)) &&
194 (m->device == pci_get_device(dev)) &&
195 ((m->subvendor == 0) || ((m->subvendor == pci_get_subvendor(dev)) &&
196 (m->subdevice == pci_get_subdevice(dev))))) {
197
198 device_set_desc(dev, m->desc);
199 return(BUS_PROBE_DEFAULT); /* allow room to be overridden */
200 }
201 }
202 return(ENXIO);
203}
204
984263bc
MD
205/********************************************************************************
206 * Initialise the controller and softc
207 */
51997c37
PA
208static int
209mly_attach(device_t dev)
984263bc 210{
51997c37
PA
211 struct mly_softc *sc = device_get_softc(dev);
212 int error;
984263bc
MD
213
214 debug_called(1);
215
51997c37
PA
216 sc->mly_dev = dev;
217
218#ifdef MLY_DEBUG
219 if (device_get_unit(sc->mly_dev) == 0)
220 mly_softc0 = sc;
221#endif
222
223 /*
224 * Do PCI-specific initialisation.
225 */
226 if ((error = mly_pci_attach(sc)) != 0)
227 goto out;
228
5b617807 229 callout_init(&sc->mly_periodic);
51997c37 230 callout_init(&sc->mly_timeout);
5b617807 231
984263bc
MD
232 /*
233 * Initialise per-controller queues.
234 */
235 mly_initq_free(sc);
984263bc
MD
236 mly_initq_busy(sc);
237 mly_initq_complete(sc);
238
984263bc
MD
239 /*
240 * Initialise command-completion task.
241 */
242 TASK_INIT(&sc->mly_task_complete, 0, mly_complete, sc);
984263bc
MD
243
244 /* disable interrupts before we start talking to the controller */
245 MLY_MASK_INTERRUPTS(sc);
246
247 /*
248 * Wait for the controller to come ready, handshake with the firmware if required.
249 * This is typically only necessary on platforms where the controller BIOS does not
250 * run.
251 */
252 if ((error = mly_fwhandshake(sc)))
51997c37 253 goto out;
984263bc
MD
254
255 /*
51997c37 256 * Allocate initial command buffers.
984263bc
MD
257 */
258 if ((error = mly_alloc_commands(sc)))
51997c37 259 goto out;
984263bc
MD
260
261 /*
262 * Obtain controller feature information
263 */
264 if ((error = mly_get_controllerinfo(sc)))
51997c37
PA
265 goto out;
266
267 /*
268 * Reallocate command buffers now we know how many we want.
269 */
270 mly_release_commands(sc);
271 if ((error = mly_alloc_commands(sc)))
272 goto out;
984263bc
MD
273
274 /*
275 * Get the current event counter for health purposes, populate the initial
276 * health status buffer.
277 */
278 if ((error = mly_get_eventstatus(sc)))
51997c37 279 goto out;
984263bc
MD
280
281 /*
51997c37 282 * Enable memory-mailbox mode.
984263bc
MD
283 */
284 if ((error = mly_enable_mmbox(sc)))
51997c37 285 goto out;
984263bc
MD
286
287 /*
288 * Attach to CAM.
289 */
290 if ((error = mly_cam_attach(sc)))
51997c37 291 goto out;
984263bc
MD
292
293 /*
294 * Print a little information about the controller
295 */
296 mly_describe_controller(sc);
297
298 /*
51997c37 299 * Mark all attached devices for rescan.
984263bc
MD
300 */
301 mly_scan_devices(sc);
302
303 /*
304 * Instigate the first status poll immediately. Rescan completions won't
305 * happen until interrupts are enabled, which should still be before
51997c37 306 * the SCSI subsystem gets to us, courtesy of the "SCSI settling delay".
984263bc
MD
307 */
308 mly_periodic((void *)sc);
309
310 /*
311 * Create the control device.
312 */
fef8985e 313 sc->mly_dev_t = make_dev(&mly_ops, device_get_unit(sc->mly_dev),
3e82b46c
MD
314 UID_ROOT, GID_OPERATOR, S_IRUSR | S_IWUSR,
315 "mly%d", device_get_unit(sc->mly_dev));
984263bc
MD
316 sc->mly_dev_t->si_drv1 = sc;
317
318 /* enable interrupts now */
319 MLY_UNMASK_INTERRUPTS(sc);
320
51997c37
PA
321#ifdef MLY_DEBUG
322 callout_reset(&sc->mly_timeout, MLY_CMD_TIMEOUT * hz,
323 (timeout_t *)mly_timeout, sc);
324#endif
325
326 out:
327 if (error != 0)
328 mly_free(sc);
329 return(error);
330}
331
332/********************************************************************************
333 * Perform PCI-specific initialisation.
334 */
335static int
336mly_pci_attach(struct mly_softc *sc)
337{
338 int i, error;
339 u_int32_t command;
340
341 debug_called(1);
342
343 /* assume failure is 'not configured' */
344 error = ENXIO;
345
346 /*
347 * Verify that the adapter is correctly set up in PCI space.
348 *
349 * XXX we shouldn't do this; the PCI code should.
350 */
351 command = pci_read_config(sc->mly_dev, PCIR_COMMAND, 2);
352 command |= PCIM_CMD_BUSMASTEREN;
353 pci_write_config(sc->mly_dev, PCIR_COMMAND, command, 2);
354 command = pci_read_config(sc->mly_dev, PCIR_COMMAND, 2);
355 if (!(command & PCIM_CMD_BUSMASTEREN)) {
356 mly_printf(sc, "can't enable busmaster feature\n");
357 goto fail;
358 }
359 if ((command & PCIM_CMD_MEMEN) == 0) {
360 mly_printf(sc, "memory window not available\n");
361 goto fail;
362 }
363
364 /*
365 * Allocate the PCI register window.
366 */
367 sc->mly_regs_rid = PCIR_BAR(0); /* first base address register */
368 if ((sc->mly_regs_resource = bus_alloc_resource_any(sc->mly_dev,
369 SYS_RES_MEMORY, &sc->mly_regs_rid, RF_ACTIVE)) == NULL) {
370 mly_printf(sc, "can't allocate register window\n");
371 goto fail;
372 }
373 sc->mly_btag = rman_get_bustag(sc->mly_regs_resource);
374 sc->mly_bhandle = rman_get_bushandle(sc->mly_regs_resource);
375
376 /*
377 * Allocate and connect our interrupt.
378 */
379 sc->mly_irq_rid = 0;
380 if ((sc->mly_irq = bus_alloc_resource_any(sc->mly_dev, SYS_RES_IRQ,
381 &sc->mly_irq_rid, RF_SHAREABLE | RF_ACTIVE)) == NULL) {
382 mly_printf(sc, "can't allocate interrupt\n");
383 goto fail;
384 }
385 error = bus_setup_intr(sc->mly_dev, sc->mly_irq, 0,
386 mly_intr, sc, &sc->mly_intr, NULL);
387 if (error) {
388 mly_printf(sc, "can't set up interrupt\n");
389 goto fail;
390 }
391
392 /* assume failure is 'out of memory' */
393 error = ENOMEM;
394
395 /*
396 * Allocate the parent bus DMA tag appropriate for our PCI interface.
397 *
398 * Note that all of these controllers are 64-bit capable.
399 */
400 if (bus_dma_tag_create(NULL, /* parent */
401 1, 0, /* alignment, boundary */
402 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
403 BUS_SPACE_MAXADDR, /* highaddr */
404 NULL, NULL, /* filter, filterarg */
405 MAXBSIZE, MLY_MAX_SGENTRIES, /* maxsize, nsegments */
406 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
407 BUS_DMA_ALLOCNOW, /* flags */
408 &sc->mly_parent_dmat)) {
409 mly_printf(sc, "can't allocate parent DMA tag\n");
410 goto fail;
411 }
412
413 /*
414 * Create DMA tag for mapping buffers into controller-addressable space.
415 */
416 if (bus_dma_tag_create(sc->mly_parent_dmat, /* parent */
417 1, 0, /* alignment, boundary */
418 BUS_SPACE_MAXADDR, /* lowaddr */
419 BUS_SPACE_MAXADDR, /* highaddr */
420 NULL, NULL, /* filter, filterarg */
421 MAXBSIZE, MLY_MAX_SGENTRIES, /* maxsize, nsegments */
422 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
423 0, /* flags */
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 &sc->mly_packet_dmat)) {
441 mly_printf(sc, "can't allocate command packet DMA tag\n");
442 goto fail;
443 }
444
445 /*
446 * Detect the hardware interface version
447 */
448 for (i = 0; mly_identifiers[i].vendor != 0; i++) {
449 if ((mly_identifiers[i].vendor == pci_get_vendor(sc->mly_dev)) &&
450 (mly_identifiers[i].device == pci_get_device(sc->mly_dev))) {
451 sc->mly_hwif = mly_identifiers[i].hwif;
452 switch(sc->mly_hwif) {
453 case MLY_HWIF_I960RX:
454 debug(1, "set hardware up for i960RX");
455 sc->mly_doorbell_true = 0x00;
456 sc->mly_command_mailbox = MLY_I960RX_COMMAND_MAILBOX;
457 sc->mly_status_mailbox = MLY_I960RX_STATUS_MAILBOX;
458 sc->mly_idbr = MLY_I960RX_IDBR;
459 sc->mly_odbr = MLY_I960RX_ODBR;
460 sc->mly_error_status = MLY_I960RX_ERROR_STATUS;
461 sc->mly_interrupt_status = MLY_I960RX_INTERRUPT_STATUS;
462 sc->mly_interrupt_mask = MLY_I960RX_INTERRUPT_MASK;
463 break;
464 case MLY_HWIF_STRONGARM:
465 debug(1, "set hardware up for StrongARM");
466 sc->mly_doorbell_true = 0xff; /* doorbell 'true' is 0 */
467 sc->mly_command_mailbox = MLY_STRONGARM_COMMAND_MAILBOX;
468 sc->mly_status_mailbox = MLY_STRONGARM_STATUS_MAILBOX;
469 sc->mly_idbr = MLY_STRONGARM_IDBR;
470 sc->mly_odbr = MLY_STRONGARM_ODBR;
471 sc->mly_error_status = MLY_STRONGARM_ERROR_STATUS;
472 sc->mly_interrupt_status = MLY_STRONGARM_INTERRUPT_STATUS;
473 sc->mly_interrupt_mask = MLY_STRONGARM_INTERRUPT_MASK;
474 break;
475 }
476 break;
477 }
478 }
479
480 /*
481 * Create the scatter/gather mappings.
482 */
483 if ((error = mly_sg_map(sc)))
484 goto fail;
485
486 /*
487 * Allocate and map the memory mailbox
488 */
489 if ((error = mly_mmbox_map(sc)))
490 goto fail;
491
492 error = 0;
493
494fail:
495 return(error);
496}
497
498/********************************************************************************
499 * Shut the controller down and detach all our resources.
500 */
501static int
502mly_detach(device_t dev)
503{
504 int error;
505
506 if ((error = mly_shutdown(dev)) != 0)
507 return(error);
508
509 mly_free(device_get_softc(dev));
984263bc
MD
510 return(0);
511}
512
513/********************************************************************************
514 * Bring the controller to a state where it can be safely left alone.
51997c37
PA
515 *
516 * Note that it should not be necessary to wait for any outstanding commands,
517 * as they should be completed prior to calling here.
518 *
519 * XXX this applies for I/O, but not status polls; we should beware of
520 * the case where a status command is running while we detach.
984263bc 521 */
51997c37
PA
522static int
523mly_shutdown(device_t dev)
984263bc 524{
51997c37 525 struct mly_softc *sc = device_get_softc(dev);
984263bc
MD
526
527 debug_called(1);
51997c37
PA
528
529 if (sc->mly_state & MLY_STATE_OPEN)
530 return(EBUSY);
984263bc
MD
531
532 /* kill the periodic event */
5b617807 533 callout_stop(&sc->mly_periodic);
984263bc 534
984263bc
MD
535 /* flush controller */
536 mly_printf(sc, "flushing cache...");
e3869ec7 537 kprintf("%s\n", mly_flush(sc) ? "failed" : "done");
984263bc
MD
538
539 MLY_MASK_INTERRUPTS(sc);
51997c37
PA
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 */
548static void
549mly_intr(void *arg)
550{
551 struct mly_softc *sc = (struct mly_softc *)arg;
552
553 debug_called(2);
554
555 mly_done(sc);
556};
557
558/********************************************************************************
559 ********************************************************************************
560 Bus-dependant Resource Management
561 ********************************************************************************
562 ********************************************************************************/
563
564/********************************************************************************
565 * Allocate memory for the scatter/gather tables
566 */
567static int
568mly_sg_map(struct mly_softc *sc)
569{
570 size_t segsize;
571
572 debug_called(1);
573
574 /*
575 * Create a single tag describing a region large enough to hold all of
576 * the s/g lists we will need.
577 */
578 segsize = sizeof(struct mly_sg_entry) * MLY_MAX_COMMANDS *MLY_MAX_SGENTRIES;
579 if (bus_dma_tag_create(sc->mly_parent_dmat, /* parent */
580 1, 0, /* alignment,boundary */
581 BUS_SPACE_MAXADDR, /* lowaddr */
582 BUS_SPACE_MAXADDR, /* highaddr */
583 NULL, NULL, /* filter, filterarg */
584 segsize, 1, /* maxsize, nsegments */
585 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
586 BUS_DMA_ALLOCNOW, /* flags */
587 &sc->mly_sg_dmat)) {
588 mly_printf(sc, "can't allocate scatter/gather DMA tag\n");
589 return(ENOMEM);
590 }
591
592 /*
593 * Allocate enough s/g maps for all commands and permanently map them into
594 * controller-visible space.
595 *
596 * XXX this assumes we can get enough space for all the s/g maps in one
597 * contiguous slab.
598 */
599 if (bus_dmamem_alloc(sc->mly_sg_dmat, (void **)&sc->mly_sg_table,
600 BUS_DMA_NOWAIT, &sc->mly_sg_dmamap)) {
601 mly_printf(sc, "can't allocate s/g table\n");
602 return(ENOMEM);
603 }
604 if (bus_dmamap_load(sc->mly_sg_dmat, sc->mly_sg_dmamap, sc->mly_sg_table,
605 segsize, mly_sg_map_helper, sc, BUS_DMA_NOWAIT) != 0)
606 return (ENOMEM);
607 return(0);
608}
609
610/********************************************************************************
611 * Save the physical address of the base of the s/g table.
612 */
613static void
614mly_sg_map_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error)
615{
616 struct mly_softc *sc = (struct mly_softc *)arg;
617
618 debug_called(1);
619
620 /* save base of s/g table's address in bus space */
621 sc->mly_sg_busaddr = segs->ds_addr;
622}
623
624/********************************************************************************
625 * Allocate memory for the memory-mailbox interface
626 */
627static int
628mly_mmbox_map(struct mly_softc *sc)
629{
630
631 /*
632 * Create a DMA tag for a single contiguous region large enough for the
633 * memory mailbox structure.
634 */
635 if (bus_dma_tag_create(sc->mly_parent_dmat, /* parent */
636 1, 0, /* alignment,boundary */
637 BUS_SPACE_MAXADDR, /* lowaddr */
638 BUS_SPACE_MAXADDR, /* highaddr */
639 NULL, NULL, /* filter, filterarg */
640 sizeof(struct mly_mmbox), 1, /* maxsize, nsegments */
641 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
642 BUS_DMA_ALLOCNOW, /* flags */
643 &sc->mly_mmbox_dmat)) {
644 mly_printf(sc, "can't allocate memory mailbox DMA tag\n");
645 return(ENOMEM);
646 }
647
648 /*
649 * Allocate the buffer
650 */
651 if (bus_dmamem_alloc(sc->mly_mmbox_dmat, (void **)&sc->mly_mmbox, BUS_DMA_NOWAIT, &sc->mly_mmbox_dmamap)) {
652 mly_printf(sc, "can't allocate memory mailbox\n");
653 return(ENOMEM);
654 }
655 if (bus_dmamap_load(sc->mly_mmbox_dmat, sc->mly_mmbox_dmamap, sc->mly_mmbox,
656 sizeof(struct mly_mmbox), mly_mmbox_map_helper, sc,
657 BUS_DMA_NOWAIT) != 0)
658 return (ENOMEM);
659 bzero(sc->mly_mmbox, sizeof(*sc->mly_mmbox));
660 return(0);
661
662}
663
664/********************************************************************************
665 * Save the physical address of the memory mailbox
666 */
667static void
668mly_mmbox_map_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error)
669{
670 struct mly_softc *sc = (struct mly_softc *)arg;
671
672 debug_called(1);
673
674 sc->mly_mmbox_busaddr = segs->ds_addr;
675}
676
677/********************************************************************************
678 * Free all of the resources associated with (sc)
679 *
680 * Should not be called if the controller is active.
681 */
682static void
683mly_free(struct mly_softc *sc)
684{
685
686 debug_called(1);
687
688 /* Remove the management device */
689 destroy_dev(sc->mly_dev_t);
690
691 /* detach from CAM */
692 mly_cam_detach(sc);
693
694 /* release command memory */
695 mly_release_commands(sc);
696
697 /* throw away the controllerinfo structure */
698 if (sc->mly_controllerinfo != NULL)
699 kfree(sc->mly_controllerinfo, M_DEVBUF);
700
701 /* throw away the controllerparam structure */
702 if (sc->mly_controllerparam != NULL)
703 kfree(sc->mly_controllerparam, M_DEVBUF);
704
705 /* destroy data-transfer DMA tag */
706 if (sc->mly_buffer_dmat)
707 bus_dma_tag_destroy(sc->mly_buffer_dmat);
708
709 /* free and destroy DMA memory and tag for s/g lists */
710 if (sc->mly_sg_table) {
711 bus_dmamap_unload(sc->mly_sg_dmat, sc->mly_sg_dmamap);
712 bus_dmamem_free(sc->mly_sg_dmat, sc->mly_sg_table, sc->mly_sg_dmamap);
713 }
714 if (sc->mly_sg_dmat)
715 bus_dma_tag_destroy(sc->mly_sg_dmat);
716
717 /* free and destroy DMA memory and tag for memory mailbox */
718 if (sc->mly_mmbox) {
719 bus_dmamap_unload(sc->mly_mmbox_dmat, sc->mly_mmbox_dmamap);
720 bus_dmamem_free(sc->mly_mmbox_dmat, sc->mly_mmbox, sc->mly_mmbox_dmamap);
721 }
722 if (sc->mly_mmbox_dmat)
723 bus_dma_tag_destroy(sc->mly_mmbox_dmat);
724
725 /* disconnect the interrupt handler */
726 if (sc->mly_intr)
727 bus_teardown_intr(sc->mly_dev, sc->mly_irq, sc->mly_intr);
728 if (sc->mly_irq != NULL)
729 bus_release_resource(sc->mly_dev, SYS_RES_IRQ, sc->mly_irq_rid, sc->mly_irq);
730
731 /* destroy the parent DMA tag */
732 if (sc->mly_parent_dmat)
733 bus_dma_tag_destroy(sc->mly_parent_dmat);
734
735 /* release the register window mapping */
736 if (sc->mly_regs_resource != NULL)
737 bus_release_resource(sc->mly_dev, SYS_RES_MEMORY, sc->mly_regs_rid, sc->mly_regs_resource);
984263bc
MD
738}
739
740/********************************************************************************
741 ********************************************************************************
742 Command Wrappers
743 ********************************************************************************
744 ********************************************************************************/
745
746/********************************************************************************
747 * Fill in the mly_controllerinfo and mly_controllerparam fields in the softc.
748 */
749static int
750mly_get_controllerinfo(struct mly_softc *sc)
751{
752 struct mly_command_ioctl mci;
753 u_int8_t status;
754 int error;
755
756 debug_called(1);
757
758 if (sc->mly_controllerinfo != NULL)
efda3bd0 759 kfree(sc->mly_controllerinfo, M_DEVBUF);
984263bc
MD
760
761 /* build the getcontrollerinfo ioctl and send it */
762 bzero(&mci, sizeof(mci));
763 sc->mly_controllerinfo = NULL;
764 mci.sub_ioctl = MDACIOCTL_GETCONTROLLERINFO;
765 if ((error = mly_ioctl(sc, &mci, (void **)&sc->mly_controllerinfo, sizeof(*sc->mly_controllerinfo),
766 &status, NULL, NULL)))
767 return(error);
768 if (status != 0)
769 return(EIO);
770
771 if (sc->mly_controllerparam != NULL)
efda3bd0 772 kfree(sc->mly_controllerparam, M_DEVBUF);
984263bc
MD
773
774 /* build the getcontrollerparameter ioctl and send it */
775 bzero(&mci, sizeof(mci));
776 sc->mly_controllerparam = NULL;
777 mci.sub_ioctl = MDACIOCTL_GETCONTROLLERPARAMETER;
778 if ((error = mly_ioctl(sc, &mci, (void **)&sc->mly_controllerparam, sizeof(*sc->mly_controllerparam),
779 &status, NULL, NULL)))
780 return(error);
781 if (status != 0)
782 return(EIO);
783
784 return(0);
785}
786
787/********************************************************************************
788 * Schedule all possible devices for a rescan.
789 *
790 */
791static void
792mly_scan_devices(struct mly_softc *sc)
793{
51997c37 794 int bus, target;
984263bc
MD
795
796 debug_called(1);
797
798 /*
799 * Clear any previous BTL information.
800 */
801 bzero(&sc->mly_btl, sizeof(sc->mly_btl));
802
803 /*
51997c37
PA
804 * Mark all devices as requiring a rescan, and let the next
805 * periodic scan collect them.
984263bc 806 */
51997c37
PA
807 for (bus = 0; bus < sc->mly_cam_channels; bus++)
808 if (MLY_BUS_IS_VALID(sc, bus))
809 for (target = 0; target < MLY_MAX_TARGETS; target++)
810 sc->mly_btl[bus][target].mb_flags = MLY_BTL_RESCAN;
984263bc
MD
811
812}
813
814/********************************************************************************
815 * Rescan a device, possibly as a consequence of getting an event which suggests
816 * that it may have changed.
51997c37
PA
817 *
818 * If we suffer resource starvation, we can abandon the rescan as we'll be
819 * retried.
984263bc
MD
820 */
821static void
822mly_rescan_btl(struct mly_softc *sc, int bus, int target)
823{
824 struct mly_command *mc;
825 struct mly_command_ioctl *mci;
826
51997c37
PA
827 debug_called(1);
828
829 /* check that this bus is valid */
830 if (!MLY_BUS_IS_VALID(sc, bus))
831 return;
984263bc
MD
832
833 /* get a command */
984263bc 834 if (mly_alloc_command(sc, &mc))
51997c37 835 return;
984263bc
MD
836
837 /* set up the data buffer */
efda3bd0 838 mc->mc_data = kmalloc(sizeof(union mly_devinfo), M_DEVBUF, M_INTWAIT | M_ZERO);
984263bc
MD
839 mc->mc_flags |= MLY_CMD_DATAIN;
840 mc->mc_complete = mly_complete_rescan;
841
984263bc
MD
842 /*
843 * Build the ioctl.
984263bc
MD
844 */
845 mci = (struct mly_command_ioctl *)&mc->mc_packet->ioctl;
846 mci->opcode = MDACMD_IOCTL;
847 mci->addr.phys.controller = 0;
848 mci->timeout.value = 30;
849 mci->timeout.scale = MLY_TIMEOUT_SECONDS;
51997c37 850 if (MLY_BUS_IS_VIRTUAL(sc, bus)) {
984263bc
MD
851 mc->mc_length = mci->data_size = sizeof(struct mly_ioctl_getlogdevinfovalid);
852 mci->sub_ioctl = MDACIOCTL_GETLOGDEVINFOVALID;
51997c37
PA
853 mci->addr.log.logdev = MLY_LOGDEV_ID(sc, bus, target);
854 debug(1, "logical device %d", mci->addr.log.logdev);
984263bc
MD
855 } else {
856 mc->mc_length = mci->data_size = sizeof(struct mly_ioctl_getphysdevinfovalid);
857 mci->sub_ioctl = MDACIOCTL_GETPHYSDEVINFOVALID;
858 mci->addr.phys.lun = 0;
859 mci->addr.phys.target = target;
860 mci->addr.phys.channel = bus;
51997c37 861 debug(1, "physical device %d:%d", mci->addr.phys.channel, mci->addr.phys.target);
984263bc
MD
862 }
863
864 /*
51997c37
PA
865 * Dispatch the command. If we successfully send the command, clear the rescan
866 * bit.
984263bc 867 */
51997c37
PA
868 if (mly_start(mc) != 0) {
869 mly_release_command(mc);
870 } else {
871 sc->mly_btl[bus][target].mb_flags &= ~MLY_BTL_RESCAN; /* success */
872 }
984263bc
MD
873}
874
875/********************************************************************************
876 * Handle the completion of a rescan operation
877 */
878static void
879mly_complete_rescan(struct mly_command *mc)
880{
881 struct mly_softc *sc = mc->mc_sc;
882 struct mly_ioctl_getlogdevinfovalid *ldi;
883 struct mly_ioctl_getphysdevinfovalid *pdi;
51997c37
PA
884 struct mly_command_ioctl *mci;
885 struct mly_btl btl, *btlp;
886 int bus, target, rescan;
984263bc 887
51997c37 888 debug_called(1);
984263bc 889
51997c37
PA
890 /*
891 * Recover the bus and target from the command. We need these even in
892 * the case where we don't have a useful response.
893 */
894 mci = (struct mly_command_ioctl *)&mc->mc_packet->ioctl;
895 if (mci->sub_ioctl == MDACIOCTL_GETLOGDEVINFOVALID) {
896 bus = MLY_LOGDEV_BUS(sc, mci->addr.log.logdev);
897 target = MLY_LOGDEV_TARGET(sc, mci->addr.log.logdev);
898 } else {
899 bus = mci->addr.phys.channel;
900 target = mci->addr.phys.target;
901 }
902 /* XXX validate bus/target? */
903
904 /* the default result is 'no device' */
905 bzero(&btl, sizeof(btl));
906
907 /* if the rescan completed OK, we have possibly-new BTL data */
984263bc
MD
908 if (mc->mc_status == 0) {
909 if (mc->mc_length == sizeof(*ldi)) {
910 ldi = (struct mly_ioctl_getlogdevinfovalid *)mc->mc_data;
51997c37
PA
911 if ((MLY_LOGDEV_BUS(sc, ldi->logical_device_number) != bus) ||
912 (MLY_LOGDEV_TARGET(sc, ldi->logical_device_number) != target)) {
913 mly_printf(sc, "WARNING: BTL rescan for %d:%d returned data for %d:%d instead\n",
914 bus, target, MLY_LOGDEV_BUS(sc, ldi->logical_device_number),
915 MLY_LOGDEV_TARGET(sc, ldi->logical_device_number));
916 /* XXX what can we do about this? */
917 }
918 btl.mb_flags = MLY_BTL_LOGICAL;
919 btl.mb_type = ldi->raid_level;
920 btl.mb_state = ldi->state;
921 debug(1, "BTL rescan for %d returns %s, %s", ldi->logical_device_number,
984263bc
MD
922 mly_describe_code(mly_table_device_type, ldi->raid_level),
923 mly_describe_code(mly_table_device_state, ldi->state));
924 } else if (mc->mc_length == sizeof(*pdi)) {
925 pdi = (struct mly_ioctl_getphysdevinfovalid *)mc->mc_data;
51997c37
PA
926 if ((pdi->channel != bus) || (pdi->target != target)) {
927 mly_printf(sc, "WARNING: BTL rescan for %d:%d returned data for %d:%d instead\n",
928 bus, target, pdi->channel, pdi->target);
929 /* XXX what can we do about this? */
930 }
931 btl.mb_flags = MLY_BTL_PHYSICAL;
932 btl.mb_type = MLY_DEVICE_TYPE_PHYSICAL;
933 btl.mb_state = pdi->state;
934 btl.mb_speed = pdi->speed;
935 btl.mb_width = pdi->width;
984263bc
MD
936 if (pdi->state != MLY_DEVICE_STATE_UNCONFIGURED)
937 sc->mly_btl[bus][target].mb_flags |= MLY_BTL_PROTECTED;
51997c37 938 debug(1, "BTL rescan for %d:%d returns %s", bus, target,
984263bc
MD
939 mly_describe_code(mly_table_device_state, pdi->state));
940 } else {
51997c37 941 mly_printf(sc, "BTL rescan result invalid\n");
984263bc 942 }
984263bc 943 }
51997c37 944
efda3bd0 945 kfree(mc->mc_data, M_DEVBUF);
984263bc 946 mly_release_command(mc);
51997c37
PA
947
948 /*
949 * Decide whether we need to rescan the device.
950 */
951 rescan = 0;
952
953 /* device type changes (usually between 'nothing' and 'something') */
954 btlp = &sc->mly_btl[bus][target];
955 if (btl.mb_flags != btlp->mb_flags) {
956 debug(1, "flags changed, rescanning");
957 rescan = 1;
958 }
959
960 /* XXX other reasons? */
961
962 /*
963 * Update BTL information.
964 */
965 *btlp = btl;
966
967 /*
968 * Perform CAM rescan if required.
969 */
970 if (rescan)
971 mly_cam_rescan_btl(sc, bus, target);
984263bc
MD
972}
973
974/********************************************************************************
975 * Get the current health status and set the 'next event' counter to suit.
976 */
977static int
978mly_get_eventstatus(struct mly_softc *sc)
979{
980 struct mly_command_ioctl mci;
981 struct mly_health_status *mh;
982 u_int8_t status;
983 int error;
984
985 /* build the gethealthstatus ioctl and send it */
986 bzero(&mci, sizeof(mci));
987 mh = NULL;
988 mci.sub_ioctl = MDACIOCTL_GETHEALTHSTATUS;
989
990 if ((error = mly_ioctl(sc, &mci, (void **)&mh, sizeof(*mh), &status, NULL, NULL)))
991 return(error);
992 if (status != 0)
993 return(EIO);
994
995 /* get the event counter */
996 sc->mly_event_change = mh->change_counter;
997 sc->mly_event_waiting = mh->next_event;
998 sc->mly_event_counter = mh->next_event;
999
1000 /* save the health status into the memory mailbox */
1001 bcopy(mh, &sc->mly_mmbox->mmm_health.status, sizeof(*mh));
1002
1003 debug(1, "initial change counter %d, event counter %d", mh->change_counter, mh->next_event);
1004
efda3bd0 1005 kfree(mh, M_DEVBUF);
984263bc
MD
1006 return(0);
1007}
1008
1009/********************************************************************************
1010 * Enable the memory mailbox mode.
1011 */
1012static int
1013mly_enable_mmbox(struct mly_softc *sc)
1014{
1015 struct mly_command_ioctl mci;
1016 u_int8_t *sp, status;
1017 int error;
1018
1019 debug_called(1);
1020
1021 /* build the ioctl and send it */
1022 bzero(&mci, sizeof(mci));
1023 mci.sub_ioctl = MDACIOCTL_SETMEMORYMAILBOX;
1024 /* set buffer addresses */
1025 mci.param.setmemorymailbox.command_mailbox_physaddr =
1026 sc->mly_mmbox_busaddr + offsetof(struct mly_mmbox, mmm_command);
1027 mci.param.setmemorymailbox.status_mailbox_physaddr =
1028 sc->mly_mmbox_busaddr + offsetof(struct mly_mmbox, mmm_status);
1029 mci.param.setmemorymailbox.health_buffer_physaddr =
1030 sc->mly_mmbox_busaddr + offsetof(struct mly_mmbox, mmm_health);
1031
1032 /* set buffer sizes - abuse of data_size field is revolting */
1033 sp = (u_int8_t *)&mci.data_size;
1034 sp[0] = ((sizeof(union mly_command_packet) * MLY_MMBOX_COMMANDS) / 1024);
1035 sp[1] = (sizeof(union mly_status_packet) * MLY_MMBOX_STATUS) / 1024;
1036 mci.param.setmemorymailbox.health_buffer_size = sizeof(union mly_health_region) / 1024;
1037
1038 debug(1, "memory mailbox at %p (0x%llx/%d 0x%llx/%d 0x%llx/%d", sc->mly_mmbox,
1039 mci.param.setmemorymailbox.command_mailbox_physaddr, sp[0],
1040 mci.param.setmemorymailbox.status_mailbox_physaddr, sp[1],
1041 mci.param.setmemorymailbox.health_buffer_physaddr,
1042 mci.param.setmemorymailbox.health_buffer_size);
1043
1044 if ((error = mly_ioctl(sc, &mci, NULL, 0, &status, NULL, NULL)))
1045 return(error);
1046 if (status != 0)
1047 return(EIO);
1048 sc->mly_state |= MLY_STATE_MMBOX_ACTIVE;
1049 debug(1, "memory mailbox active");
1050 return(0);
1051}
1052
1053/********************************************************************************
1054 * Flush all pending I/O from the controller.
1055 */
1056static int
1057mly_flush(struct mly_softc *sc)
1058{
1059 struct mly_command_ioctl mci;
1060 u_int8_t status;
1061 int error;
1062
1063 debug_called(1);
1064
1065 /* build the ioctl */
1066 bzero(&mci, sizeof(mci));
1067 mci.sub_ioctl = MDACIOCTL_FLUSHDEVICEDATA;
1068 mci.param.deviceoperation.operation_device = MLY_OPDEVICE_PHYSICAL_CONTROLLER;
1069
1070 /* pass it off to the controller */
1071 if ((error = mly_ioctl(sc, &mci, NULL, 0, &status, NULL, NULL)))
1072 return(error);
1073
1074 return((status == 0) ? 0 : EIO);
1075}
1076
1077/********************************************************************************
1078 * Perform an ioctl command.
1079 *
1080 * If (data) is not NULL, the command requires data transfer. If (*data) is NULL
1081 * the command requires data transfer from the controller, and we will allocate
1082 * a buffer for it. If (*data) is not NULL, the command requires data transfer
1083 * to the controller.
1084 *
1085 * XXX passing in the whole ioctl structure is ugly. Better ideas?
1086 *
1087 * XXX we don't even try to handle the case where datasize > 4k. We should.
1088 */
1089static int
1090mly_ioctl(struct mly_softc *sc, struct mly_command_ioctl *ioctl, void **data, size_t datasize,
1091 u_int8_t *status, void *sense_buffer, size_t *sense_length)
1092{
1093 struct mly_command *mc;
1094 struct mly_command_ioctl *mci;
1095 int error;
1096
1097 debug_called(1);
1098
1099 mc = NULL;
1100 if (mly_alloc_command(sc, &mc)) {
1101 error = ENOMEM;
1102 goto out;
1103 }
1104
1105 /* copy the ioctl structure, but save some important fields and then fixup */
1106 mci = &mc->mc_packet->ioctl;
1107 ioctl->sense_buffer_address = mci->sense_buffer_address;
1108 ioctl->maximum_sense_size = mci->maximum_sense_size;
1109 *mci = *ioctl;
1110 mci->opcode = MDACMD_IOCTL;
1111 mci->timeout.value = 30;
1112 mci->timeout.scale = MLY_TIMEOUT_SECONDS;
1113
1114 /* handle the data buffer */
1115 if (data != NULL) {
1116 if (*data == NULL) {
1117 /* allocate data buffer */
efda3bd0 1118 mc->mc_data = kmalloc(datasize, M_DEVBUF, M_INTWAIT);
984263bc
MD
1119 mc->mc_flags |= MLY_CMD_DATAIN;
1120 } else {
1121 mc->mc_data = *data;
1122 mc->mc_flags |= MLY_CMD_DATAOUT;
1123 }
1124 mc->mc_length = datasize;
1125 mc->mc_packet->generic.data_size = datasize;
1126 }
1127
1128 /* run the command */
1129 if ((error = mly_immediate_command(mc)))
1130 goto out;
1131
1132 /* clean up and return any data */
1133 *status = mc->mc_status;
1134 if ((mc->mc_sense > 0) && (sense_buffer != NULL)) {
1135 bcopy(mc->mc_packet, sense_buffer, mc->mc_sense);
1136 *sense_length = mc->mc_sense;
1137 goto out;
1138 }
1139
1140 /* should we return a data pointer? */
1141 if ((data != NULL) && (*data == NULL))
1142 *data = mc->mc_data;
1143
1144 /* command completed OK */
1145 error = 0;
1146
1147out:
1148 if (mc != NULL) {
1149 /* do we need to free a data buffer we allocated? */
1150 if (error && (mc->mc_data != NULL) && (*data == NULL))
efda3bd0 1151 kfree(mc->mc_data, M_DEVBUF);
984263bc
MD
1152 mly_release_command(mc);
1153 }
1154 return(error);
1155}
1156
1157/********************************************************************************
51997c37
PA
1158 * Check for event(s) outstanding in the controller.
1159 */
1160static void
1161mly_check_event(struct mly_softc *sc)
1162{
1163
1164 /*
1165 * The controller may have updated the health status information,
1166 * so check for it here. Note that the counters are all in host memory,
1167 * so this check is very cheap. Also note that we depend on checking on
1168 * completion
1169 */
1170 if (sc->mly_mmbox->mmm_health.status.change_counter != sc->mly_event_change) {
1171 sc->mly_event_change = sc->mly_mmbox->mmm_health.status.change_counter;
1172 debug(1, "event change %d, event status update, %d -> %d", sc->mly_event_change,
1173 sc->mly_event_waiting, sc->mly_mmbox->mmm_health.status.next_event);
1174 sc->mly_event_waiting = sc->mly_mmbox->mmm_health.status.next_event;
1175
1176 /* wake up anyone that might be interested in this */
1177 wakeup(&sc->mly_event_change);
1178 }
1179 if (sc->mly_event_counter != sc->mly_event_waiting)
1180 mly_fetch_event(sc);
1181}
1182
1183/********************************************************************************
984263bc 1184 * Fetch one event from the controller.
51997c37
PA
1185 *
1186 * If we fail due to resource starvation, we'll be retried the next time a
1187 * command completes.
984263bc
MD
1188 */
1189static void
1190mly_fetch_event(struct mly_softc *sc)
1191{
1192 struct mly_command *mc;
1193 struct mly_command_ioctl *mci;
984263bc
MD
1194 u_int32_t event;
1195
51997c37 1196 debug_called(1);
984263bc
MD
1197
1198 /* get a command */
984263bc 1199 if (mly_alloc_command(sc, &mc))
51997c37 1200 return;
984263bc
MD
1201
1202 /* set up the data buffer */
efda3bd0 1203 mc->mc_data = kmalloc(sizeof(struct mly_event), M_DEVBUF, M_INTWAIT|M_ZERO);
984263bc
MD
1204 mc->mc_length = sizeof(struct mly_event);
1205 mc->mc_flags |= MLY_CMD_DATAIN;
1206 mc->mc_complete = mly_complete_event;
1207
1208 /*
1209 * Get an event number to fetch. It's possible that we've raced with another
1210 * context for the last event, in which case there will be no more events.
1211 */
5eb77fd5 1212 crit_enter();
984263bc
MD
1213 if (sc->mly_event_counter == sc->mly_event_waiting) {
1214 mly_release_command(mc);
5eb77fd5 1215 crit_exit();
984263bc
MD
1216 return;
1217 }
1218 event = sc->mly_event_counter++;
5eb77fd5 1219 crit_exit();
984263bc
MD
1220
1221 /*
1222 * Build the ioctl.
1223 *
1224 * At this point we are committed to sending this request, as it
1225 * will be the only one constructed for this particular event number.
1226 */
1227 mci = (struct mly_command_ioctl *)&mc->mc_packet->ioctl;
1228 mci->opcode = MDACMD_IOCTL;
1229 mci->data_size = sizeof(struct mly_event);
1230 mci->addr.phys.lun = (event >> 16) & 0xff;
1231 mci->addr.phys.target = (event >> 24) & 0xff;
1232 mci->addr.phys.channel = 0;
1233 mci->addr.phys.controller = 0;
1234 mci->timeout.value = 30;
1235 mci->timeout.scale = MLY_TIMEOUT_SECONDS;
1236 mci->sub_ioctl = MDACIOCTL_GETEVENT;
1237 mci->param.getevent.sequence_number_low = event & 0xffff;
1238
51997c37 1239 debug(1, "fetch event %u", event);
984263bc
MD
1240
1241 /*
51997c37
PA
1242 * Submit the command.
1243 *
1244 * Note that failure of mly_start() will result in this event never being
1245 * fetched.
984263bc 1246 */
51997c37
PA
1247 if (mly_start(mc) != 0) {
1248 mly_printf(sc, "couldn't fetch event %u\n", event);
1249 mly_release_command(mc);
1250 }
984263bc
MD
1251}
1252
1253/********************************************************************************
1254 * Handle the completion of an event poll.
984263bc
MD
1255 */
1256static void
1257mly_complete_event(struct mly_command *mc)
1258{
1259 struct mly_softc *sc = mc->mc_sc;
1260 struct mly_event *me = (struct mly_event *)mc->mc_data;
1261
51997c37 1262 debug_called(1);
984263bc
MD
1263
1264 /*
1265 * If the event was successfully fetched, process it.
1266 */
1267 if (mc->mc_status == SCSI_STATUS_OK) {
1268 mly_process_event(sc, me);
efda3bd0 1269 kfree(me, M_DEVBUF);
984263bc
MD
1270 }
1271 mly_release_command(mc);
51997c37
PA
1272
1273 /*
1274 * Check for another event.
1275 */
1276 mly_check_event(sc);
984263bc
MD
1277}
1278
1279/********************************************************************************
1280 * Process a controller event.
1281 */
1282static void
1283mly_process_event(struct mly_softc *sc, struct mly_event *me)
1284{
1285 struct scsi_sense_data *ssd = (struct scsi_sense_data *)&me->sense[0];
1286 char *fp, *tp;
1287 int bus, target, event, class, action;
1288
1289 /*
1290 * Errors can be reported using vendor-unique sense data. In this case, the
1291 * event code will be 0x1c (Request sense data present), the sense key will
1292 * be 0x09 (vendor specific), the MSB of the ASC will be set, and the
1293 * actual event code will be a 16-bit value comprised of the ASCQ (low byte)
1294 * and low seven bits of the ASC (low seven bits of the high byte).
1295 */
1296 if ((me->code == 0x1c) &&
1297 ((ssd->flags & SSD_KEY) == SSD_KEY_Vendor_Specific) &&
1298 (ssd->add_sense_code & 0x80)) {
1299 event = ((int)(ssd->add_sense_code & ~0x80) << 8) + ssd->add_sense_code_qual;
1300 } else {
1301 event = me->code;
1302 }
1303
1304 /* look up event, get codes */
1305 fp = mly_describe_code(mly_table_event, event);
1306
51997c37 1307 debug(1, "Event %d code 0x%x", me->sequence_number, me->code);
984263bc
MD
1308
1309 /* quiet event? */
1310 class = fp[0];
1311 if (isupper(class) && bootverbose)
1312 class = tolower(class);
1313
1314 /* get action code, text string */
1315 action = fp[1];
1316 tp = &fp[2];
1317
1318 /*
1319 * Print some information about the event.
1320 *
1321 * This code uses a table derived from the corresponding portion of the Linux
1322 * driver, and thus the parser is very similar.
1323 */
1324 switch(class) {
1325 case 'p': /* error on physical device */
1326 mly_printf(sc, "physical device %d:%d %s\n", me->channel, me->target, tp);
1327 if (action == 'r')
1328 sc->mly_btl[me->channel][me->target].mb_flags |= MLY_BTL_RESCAN;
1329 break;
1330 case 'l': /* error on logical unit */
1331 case 'm': /* message about logical unit */
1332 bus = MLY_LOGDEV_BUS(sc, me->lun);
51997c37 1333 target = MLY_LOGDEV_TARGET(sc, me->lun);
984263bc
MD
1334 mly_name_device(sc, bus, target);
1335 mly_printf(sc, "logical device %d (%s) %s\n", me->lun, sc->mly_btl[bus][target].mb_name, tp);
1336 if (action == 'r')
1337 sc->mly_btl[bus][target].mb_flags |= MLY_BTL_RESCAN;
1338 break;
1339 break;
1340 case 's': /* report of sense data */
1341 if (((ssd->flags & SSD_KEY) == SSD_KEY_NO_SENSE) ||
1342 (((ssd->flags & SSD_KEY) == SSD_KEY_NOT_READY) &&
1343 (ssd->add_sense_code == 0x04) &&
1344 ((ssd->add_sense_code_qual == 0x01) || (ssd->add_sense_code_qual == 0x02))))
1345 break; /* ignore NO_SENSE or NOT_READY in one case */
1346
1347 mly_printf(sc, "physical device %d:%d %s\n", me->channel, me->target, tp);
1348 mly_printf(sc, " sense key %d asc %02x ascq %02x\n",
1349 ssd->flags & SSD_KEY, ssd->add_sense_code, ssd->add_sense_code_qual);
1350 mly_printf(sc, " info %4D csi %4D\n", ssd->info, "", ssd->cmd_spec_info, "");
1351 if (action == 'r')
1352 sc->mly_btl[me->channel][me->target].mb_flags |= MLY_BTL_RESCAN;
1353 break;
1354 case 'e':
1355 mly_printf(sc, tp, me->target, me->lun);
51997c37 1356 kprintf("\n");
984263bc
MD
1357 break;
1358 case 'c':
1359 mly_printf(sc, "controller %s\n", tp);
1360 break;
1361 case '?':
1362 mly_printf(sc, "%s - %d\n", tp, me->code);
1363 break;
1364 default: /* probably a 'noisy' event being ignored */
1365 break;
1366 }
1367}
1368
1369/********************************************************************************
1370 * Perform periodic activities.
1371 */
1372static void
1373mly_periodic(void *data)
1374{
1375 struct mly_softc *sc = (struct mly_softc *)data;
51997c37 1376 int bus, target;
984263bc
MD
1377
1378 debug_called(2);
1379
1380 /*
1381 * Scan devices.
1382 */
51997c37
PA
1383 for (bus = 0; bus < sc->mly_cam_channels; bus++) {
1384 if (MLY_BUS_IS_VALID(sc, bus)) {
1385 for (target = 0; target < MLY_MAX_TARGETS; target++) {
984263bc 1386
51997c37
PA
1387 /* ignore the controller in this scan */
1388 if (target == sc->mly_controllerparam->initiator_id)
1389 continue;
984263bc 1390
51997c37
PA
1391 /* perform device rescan? */
1392 if (sc->mly_btl[bus][target].mb_flags & MLY_BTL_RESCAN)
1393 mly_rescan_btl(sc, bus, target);
1394 }
984263bc
MD
1395 }
1396 }
51997c37
PA
1397
1398 /* check for controller events */
1399 mly_check_event(sc);
984263bc 1400
51997c37
PA
1401 /* reschedule ourselves */
1402 callout_reset(&sc->mly_periodic, MLY_PERIODIC_INTERVAL * hz, mly_periodic, sc);
984263bc
MD
1403}
1404
1405/********************************************************************************
1406 ********************************************************************************
1407 Command Processing
1408 ********************************************************************************
1409 ********************************************************************************/
1410
1411/********************************************************************************
1412 * Run a command and wait for it to complete.
1413 *
1414 */
1415static int
1416mly_immediate_command(struct mly_command *mc)
1417{
1418 struct mly_softc *sc = mc->mc_sc;
5eb77fd5 1419 int error;
984263bc 1420
51997c37 1421 debug_called(1);
984263bc
MD
1422
1423 /* spinning at splcam is ugly, but we're only used during controller init */
5eb77fd5 1424 crit_enter();
343fb0e4
YT
1425 if ((error = mly_start(mc))) {
1426 crit_exit();
984263bc 1427 return(error);
343fb0e4 1428 }
984263bc
MD
1429
1430 if (sc->mly_state & MLY_STATE_INTERRUPTS_ON) {
1431 /* sleep on the command */
1432 while(!(mc->mc_flags & MLY_CMD_COMPLETE)) {
377d4740 1433 tsleep(mc, 0, "mlywait", 0);
984263bc
MD
1434 }
1435 } else {
1436 /* spin and collect status while we do */
1437 while(!(mc->mc_flags & MLY_CMD_COMPLETE)) {
1438 mly_done(mc->mc_sc);
1439 }
1440 }
5eb77fd5 1441 crit_exit();
984263bc
MD
1442 return(0);
1443}
1444
1445/********************************************************************************
51997c37
PA
1446 * Deliver a command to the controller.
1447 *
1448 * XXX it would be good to just queue commands that we can't submit immediately
1449 * and send them later, but we probably want a wrapper for that so that
1450 * we don't hang on a failed submission for an immediate command.
984263bc
MD
1451 */
1452static int
1453mly_start(struct mly_command *mc)
1454{
1455 struct mly_softc *sc = mc->mc_sc;
1456 union mly_command_packet *pkt;
984263bc
MD
1457
1458 debug_called(2);
1459
1460 /*
1461 * Set the command up for delivery to the controller.
1462 */
1463 mly_map_command(mc);
1464 mc->mc_packet->generic.command_id = mc->mc_slot;
1465
51997c37
PA
1466#ifdef MLY_DEBUG
1467 mc->mc_timestamp = time_second;
1468#endif
1469
5eb77fd5 1470 crit_enter();
984263bc
MD
1471
1472 /*
1473 * Do we have to use the hardware mailbox?
1474 */
1475 if (!(sc->mly_state & MLY_STATE_MMBOX_ACTIVE)) {
1476 /*
1477 * Check to see if the controller is ready for us.
1478 */
1479 if (MLY_IDBR_TRUE(sc, MLY_HM_CMDSENT)) {
5eb77fd5 1480 crit_exit();
984263bc
MD
1481 return(EBUSY);
1482 }
1483 mc->mc_flags |= MLY_CMD_BUSY;
1484
1485 /*
1486 * It's ready, send the command.
1487 */
1488 MLY_SET_MBOX(sc, sc->mly_command_mailbox, &mc->mc_packetphys);
1489 MLY_SET_REG(sc, sc->mly_idbr, MLY_HM_CMDSENT);
1490
1491 } else { /* use memory-mailbox mode */
1492
1493 pkt = &sc->mly_mmbox->mmm_command[sc->mly_mmbox_command_index];
1494
1495 /* check to see if the next index is free yet */
1496 if (pkt->mmbox.flag != 0) {
5eb77fd5 1497 crit_exit();
984263bc
MD
1498 return(EBUSY);
1499 }
1500 mc->mc_flags |= MLY_CMD_BUSY;
1501
1502 /* copy in new command */
1503 bcopy(mc->mc_packet->mmbox.data, pkt->mmbox.data, sizeof(pkt->mmbox.data));
1504 /* barrier to ensure completion of previous write before we write the flag */
51997c37
PA
1505 bus_space_barrier(sc->mly_btag, sc->mly_bhandle, 0, 0,
1506 BUS_SPACE_BARRIER_WRITE);
984263bc
MD
1507 /* copy flag last */
1508 pkt->mmbox.flag = mc->mc_packet->mmbox.flag;
1509 /* barrier to ensure completion of previous write before we notify the controller */
51997c37
PA
1510 bus_space_barrier(sc->mly_btag, sc->mly_bhandle, 0, 0,
1511 BUS_SPACE_BARRIER_WRITE);
984263bc
MD
1512
1513 /* signal controller, update index */
1514 MLY_SET_REG(sc, sc->mly_idbr, MLY_AM_CMDSENT);
1515 sc->mly_mmbox_command_index = (sc->mly_mmbox_command_index + 1) % MLY_MMBOX_COMMANDS;
1516 }
1517
1518 mly_enqueue_busy(mc);
5eb77fd5 1519 crit_exit();
984263bc
MD
1520 return(0);
1521}
1522
1523/********************************************************************************
1524 * Pick up command status from the controller, schedule a completion event
1525 */
51997c37 1526static void
984263bc
MD
1527mly_done(struct mly_softc *sc)
1528{
1529 struct mly_command *mc;
1530 union mly_status_packet *sp;
1531 u_int16_t slot;
5eb77fd5 1532 int worked;
984263bc 1533
5eb77fd5 1534 crit_enter();
984263bc
MD
1535 worked = 0;
1536
1537 /* pick up hardware-mailbox commands */
1538 if (MLY_ODBR_TRUE(sc, MLY_HM_STSREADY)) {
1539 slot = MLY_GET_REG2(sc, sc->mly_status_mailbox);
1540 if (slot < MLY_SLOT_MAX) {
1541 mc = &sc->mly_command[slot - MLY_SLOT_START];
1542 mc->mc_status = MLY_GET_REG(sc, sc->mly_status_mailbox + 2);
1543 mc->mc_sense = MLY_GET_REG(sc, sc->mly_status_mailbox + 3);
1544 mc->mc_resid = MLY_GET_REG4(sc, sc->mly_status_mailbox + 4);
1545 mly_remove_busy(mc);
1546 mc->mc_flags &= ~MLY_CMD_BUSY;
1547 mly_enqueue_complete(mc);
1548 worked = 1;
1549 } else {
1550 /* slot 0xffff may mean "extremely bogus command" */
1551 mly_printf(sc, "got HM completion for illegal slot %u\n", slot);
1552 }
1553 /* unconditionally acknowledge status */
1554 MLY_SET_REG(sc, sc->mly_odbr, MLY_HM_STSREADY);
1555 MLY_SET_REG(sc, sc->mly_idbr, MLY_HM_STSACK);
1556 }
1557
1558 /* pick up memory-mailbox commands */
1559 if (MLY_ODBR_TRUE(sc, MLY_AM_STSREADY)) {
1560 for (;;) {
1561 sp = &sc->mly_mmbox->mmm_status[sc->mly_mmbox_status_index];
1562
1563 /* check for more status */
1564 if (sp->mmbox.flag == 0)
1565 break;
1566
1567 /* get slot number */
1568 slot = sp->status.command_id;
1569 if (slot < MLY_SLOT_MAX) {
1570 mc = &sc->mly_command[slot - MLY_SLOT_START];
1571 mc->mc_status = sp->status.status;
1572 mc->mc_sense = sp->status.sense_length;
1573 mc->mc_resid = sp->status.residue;
1574 mly_remove_busy(mc);
1575 mc->mc_flags &= ~MLY_CMD_BUSY;
1576 mly_enqueue_complete(mc);
1577 worked = 1;
1578 } else {
1579 /* slot 0xffff may mean "extremely bogus command" */
1580 mly_printf(sc, "got AM completion for illegal slot %u at %d\n",
1581 slot, sc->mly_mmbox_status_index);
1582 }
1583
1584 /* clear and move to next index */
1585 sp->mmbox.flag = 0;
1586 sc->mly_mmbox_status_index = (sc->mly_mmbox_status_index + 1) % MLY_MMBOX_STATUS;
1587 }
1588 /* acknowledge that we have collected status value(s) */
1589 MLY_SET_REG(sc, sc->mly_odbr, MLY_AM_STSREADY);
1590 }
1591
5eb77fd5 1592 crit_exit();
984263bc 1593 if (worked) {
984263bc
MD
1594 if (sc->mly_state & MLY_STATE_INTERRUPTS_ON)
1595 taskqueue_enqueue(taskqueue_swi, &sc->mly_task_complete);
1596 else
984263bc
MD
1597 mly_complete(sc, 0);
1598 }
1599}
1600
1601/********************************************************************************
1602 * Process completed commands
1603 */
1604static void
1605mly_complete(void *context, int pending)
1606{
1607 struct mly_softc *sc = (struct mly_softc *)context;
1608 struct mly_command *mc;
1609 void (* mc_complete)(struct mly_command *mc);
1610
1611
1612 debug_called(2);
1613
1614 /*
1615 * Spin pulling commands off the completed queue and processing them.
1616 */
1617 while ((mc = mly_dequeue_complete(sc)) != NULL) {
1618
1619 /*
1620 * Free controller resources, mark command complete.
1621 *
1622 * Note that as soon as we mark the command complete, it may be freed
1623 * out from under us, so we need to save the mc_complete field in
1624 * order to later avoid dereferencing mc. (We would not expect to
1625 * have a polling/sleeping consumer with mc_complete != NULL).
1626 */
1627 mly_unmap_command(mc);
1628 mc_complete = mc->mc_complete;
1629 mc->mc_flags |= MLY_CMD_COMPLETE;
1630
1631 /*
1632 * Call completion handler or wake up sleeping consumer.
1633 */
1634 if (mc_complete != NULL) {
1635 mc_complete(mc);
1636 } else {
1637 wakeup(mc);
1638 }
1639 }
51997c37 1640
984263bc 1641 /*
51997c37
PA
1642 * XXX if we are deferring commands due to controller-busy status, we should
1643 * retry submitting them here.
984263bc 1644 */
984263bc
MD
1645}
1646
1647/********************************************************************************
1648 ********************************************************************************
1649 Command Buffer Management
1650 ********************************************************************************
1651 ********************************************************************************/
1652
1653/********************************************************************************
1654 * Allocate a command.
1655 */
51997c37 1656static int
984263bc
MD
1657mly_alloc_command(struct mly_softc *sc, struct mly_command **mcp)
1658{
1659 struct mly_command *mc;
1660
1661 debug_called(3);
1662
1663 if ((mc = mly_dequeue_free(sc)) == NULL)
1664 return(ENOMEM);
1665
1666 *mcp = mc;
1667 return(0);
1668}
1669
1670/********************************************************************************
1671 * Release a command back to the freelist.
1672 */
51997c37 1673static void
984263bc
MD
1674mly_release_command(struct mly_command *mc)
1675{
1676 debug_called(3);
1677
1678 /*
1679 * Fill in parts of the command that may cause confusion if
1680 * a consumer doesn't when we are later allocated.
1681 */
1682 mc->mc_data = NULL;
1683 mc->mc_flags = 0;
1684 mc->mc_complete = NULL;
1685 mc->mc_private = NULL;
1686
1687 /*
1688 * By default, we set up to overwrite the command packet with
1689 * sense information.
1690 */
1691 mc->mc_packet->generic.sense_buffer_address = mc->mc_packetphys;
1692 mc->mc_packet->generic.maximum_sense_size = sizeof(union mly_command_packet);
1693
1694 mly_enqueue_free(mc);
1695}
1696
1697/********************************************************************************
1698 * Map helper for command allocation.
1699 */
1700static void
1701mly_alloc_commands_map(void *arg, bus_dma_segment_t *segs, int nseg, int error)
1702{
51997c37 1703 struct mly_softc *sc = (struct mly_softc *)arg;
984263bc 1704
51997c37 1705 debug_called(1);
984263bc
MD
1706
1707 sc->mly_packetphys = segs[0].ds_addr;
1708}
1709
1710/********************************************************************************
1711 * Allocate and initialise command and packet structures.
51997c37
PA
1712 *
1713 * If the controller supports fewer than MLY_MAX_COMMANDS commands, limit our
1714 * allocation to that number. If we don't yet know how many commands the
1715 * controller supports, allocate a very small set (suitable for initialisation
1716 * purposes only).
984263bc
MD
1717 */
1718static int
1719mly_alloc_commands(struct mly_softc *sc)
1720{
1721 struct mly_command *mc;
51997c37 1722 int i, ncmd;
984263bc 1723
51997c37
PA
1724 if (sc->mly_controllerinfo == NULL) {
1725 ncmd = 4;
1726 } else {
1727 ncmd = min(MLY_MAX_COMMANDS, sc->mly_controllerinfo->maximum_parallel_commands);
1728 }
1729
984263bc
MD
1730 /*
1731 * Allocate enough space for all the command packets in one chunk and
1732 * map them permanently into controller-visible space.
1733 */
1734 if (bus_dmamem_alloc(sc->mly_packet_dmat, (void **)&sc->mly_packet,
1735 BUS_DMA_NOWAIT, &sc->mly_packetmap)) {
1736 return(ENOMEM);
1737 }
51997c37
PA
1738 if (bus_dmamap_load(sc->mly_packet_dmat, sc->mly_packetmap, sc->mly_packet,
1739 ncmd * sizeof(union mly_command_packet),
1740 mly_alloc_commands_map, sc, BUS_DMA_NOWAIT) != 0)
1741 return (ENOMEM);
984263bc 1742
51997c37 1743 for (i = 0; i < ncmd; i++) {
984263bc
MD
1744 mc = &sc->mly_command[i];
1745 bzero(mc, sizeof(*mc));
1746 mc->mc_sc = sc;
1747 mc->mc_slot = MLY_SLOT_START + i;
1748 mc->mc_packet = sc->mly_packet + i;
1749 mc->mc_packetphys = sc->mly_packetphys + (i * sizeof(union mly_command_packet));
1750 if (!bus_dmamap_create(sc->mly_buffer_dmat, 0, &mc->mc_datamap))
1751 mly_release_command(mc);
1752 }
51997c37
PA
1753 return(0);
1754}
1755
1756/********************************************************************************
1757 * Free all the storage held by commands.
1758 *
1759 * Must be called with all commands on the free list.
1760 */
1761static void
1762mly_release_commands(struct mly_softc *sc)
1763{
1764 struct mly_command *mc;
1765
1766 /* throw away command buffer DMA maps */
1767 while (mly_alloc_command(sc, &mc) == 0)
1768 bus_dmamap_destroy(sc->mly_buffer_dmat, mc->mc_datamap);
1769
1770 /* release the packet storage */
1771 if (sc->mly_packet != NULL) {
1772 bus_dmamap_unload(sc->mly_packet_dmat, sc->mly_packetmap);
1773 bus_dmamem_free(sc->mly_packet_dmat, sc->mly_packet, sc->mly_packetmap);
1774 sc->mly_packet = NULL;
1775 }
984263bc
MD
1776}
1777
51997c37 1778
984263bc
MD
1779/********************************************************************************
1780 * Command-mapping helper function - populate this command's s/g table
1781 * with the s/g entries for its data.
1782 */
1783static void
1784mly_map_command_sg(void *arg, bus_dma_segment_t *segs, int nseg, int error)
1785{
1786 struct mly_command *mc = (struct mly_command *)arg;
1787 struct mly_softc *sc = mc->mc_sc;
1788 struct mly_command_generic *gen = &(mc->mc_packet->generic);
1789 struct mly_sg_entry *sg;
1790 int i, tabofs;
1791
51997c37 1792 debug_called(2);
984263bc
MD
1793
1794 /* can we use the transfer structure directly? */
1795 if (nseg <= 2) {
1796 sg = &gen->transfer.direct.sg[0];
1797 gen->command_control.extended_sg_table = 0;
1798 } else {
51997c37 1799 tabofs = ((mc->mc_slot - MLY_SLOT_START) * MLY_MAX_SGENTRIES);
984263bc
MD
1800 sg = sc->mly_sg_table + tabofs;
1801 gen->transfer.indirect.entries[0] = nseg;
1802 gen->transfer.indirect.table_physaddr[0] = sc->mly_sg_busaddr + (tabofs * sizeof(struct mly_sg_entry));
1803 gen->command_control.extended_sg_table = 1;
1804 }
1805
1806 /* copy the s/g table */
1807 for (i = 0; i < nseg; i++) {
1808 sg[i].physaddr = segs[i].ds_addr;
1809 sg[i].length = segs[i].ds_len;
1810 }
1811
1812}
1813
1814#if 0
1815/********************************************************************************
1816 * Command-mapping helper function - save the cdb's physical address.
1817 *
1818 * We don't support 'large' SCSI commands at this time, so this is unused.
1819 */
1820static void
1821mly_map_command_cdb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
1822{
1823 struct mly_command *mc = (struct mly_command *)arg;
1824
51997c37 1825 debug_called(2);
984263bc
MD
1826
1827 /* XXX can we safely assume that a CDB will never cross a page boundary? */
1828 if ((segs[0].ds_addr % PAGE_SIZE) >
1829 ((segs[0].ds_addr + mc->mc_packet->scsi_large.cdb_length) % PAGE_SIZE))
1830 panic("cdb crosses page boundary");
1831
1832 /* fix up fields in the command packet */
1833 mc->mc_packet->scsi_large.cdb_physaddr = segs[0].ds_addr;
1834}
1835#endif
1836
1837/********************************************************************************
1838 * Map a command into controller-visible space
1839 */
1840static void
1841mly_map_command(struct mly_command *mc)
1842{
1843 struct mly_softc *sc = mc->mc_sc;
1844
1845 debug_called(2);
1846
1847 /* don't map more than once */
1848 if (mc->mc_flags & MLY_CMD_MAPPED)
1849 return;
1850
1851 /* does the command have a data buffer? */
51997c37 1852 if (mc->mc_data != NULL) {
984263bc
MD
1853 bus_dmamap_load(sc->mly_buffer_dmat, mc->mc_datamap, mc->mc_data, mc->mc_length,
1854 mly_map_command_sg, mc, 0);
1855
51997c37
PA
1856 if (mc->mc_flags & MLY_CMD_DATAIN)
1857 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_PREREAD);
1858 if (mc->mc_flags & MLY_CMD_DATAOUT)
1859 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_PREWRITE);
1860 }
984263bc
MD
1861 mc->mc_flags |= MLY_CMD_MAPPED;
1862}
1863
1864/********************************************************************************
1865 * Unmap a command from controller-visible space
1866 */
1867static void
1868mly_unmap_command(struct mly_command *mc)
1869{
1870 struct mly_softc *sc = mc->mc_sc;
1871
1872 debug_called(2);
1873
1874 if (!(mc->mc_flags & MLY_CMD_MAPPED))
1875 return;
1876
984263bc 1877 /* does the command have a data buffer? */
51997c37
PA
1878 if (mc->mc_data != NULL) {
1879 if (mc->mc_flags & MLY_CMD_DATAIN)
1880 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_POSTREAD);
1881 if (mc->mc_flags & MLY_CMD_DATAOUT)
1882 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_POSTWRITE);
984263bc 1883
51997c37
PA
1884 bus_dmamap_unload(sc->mly_buffer_dmat, mc->mc_datamap);
1885 }
984263bc
MD
1886 mc->mc_flags &= ~MLY_CMD_MAPPED;
1887}
1888
51997c37
PA
1889
1890/********************************************************************************
1891 ********************************************************************************
1892 CAM interface
1893 ********************************************************************************
1894 ********************************************************************************/
1895
1896/********************************************************************************
1897 * Attach the physical and virtual SCSI busses to CAM.
1898 *
1899 * Physical bus numbering starts from 0, virtual bus numbering from one greater
1900 * than the highest physical bus. Physical busses are only registered if
1901 * the kernel environment variable "hw.mly.register_physical_channels" is set.
1902 *
1903 * When we refer to a "bus", we are referring to the bus number registered with
1904 * the SIM, wheras a "channel" is a channel number given to the adapter. In order
1905 * to keep things simple, we map these 1:1, so "bus" and "channel" may be used
1906 * interchangeably.
1907 */
1908static int
1909mly_cam_attach(struct mly_softc *sc)
1910{
1911 struct cam_devq *devq;
1912 int chn, i;
1913
1914 debug_called(1);
1915
1916 /*
1917 * Allocate a devq for all our channels combined.
1918 */
1919 if ((devq = cam_simq_alloc(sc->mly_controllerinfo->maximum_parallel_commands)) == NULL) {
1920 mly_printf(sc, "can't allocate CAM SIM queue\n");
1921 return(ENOMEM);
1922 }
1923
1924 /*
1925 * If physical channel registration has been requested, register these first.
1926 * Note that we enable tagged command queueing for physical channels.
1927 */
1928 if (ktestenv("hw.mly.register_physical_channels")) {
1929 chn = 0;
1930 for (i = 0; i < sc->mly_controllerinfo->physical_channels_present; i++, chn++) {
1931
1932 if ((sc->mly_cam_sim[chn] = cam_sim_alloc(mly_cam_action, mly_cam_poll, "mly", sc,
1933 device_get_unit(sc->mly_dev),
1c8b7a9a 1934 &sim_mplock,
51997c37
PA
1935 sc->mly_controllerinfo->maximum_parallel_commands,
1936 1, devq)) == NULL) {
1937 return(ENOMEM);
1938 }
1939 if (xpt_bus_register(sc->mly_cam_sim[chn], chn)) {
1940 mly_printf(sc, "CAM XPT phsyical channel registration failed\n");
1941 return(ENXIO);
1942 }
1943 debug(1, "registered physical channel %d", chn);
1944 }
1945 }
1946
1947 /*
1948 * Register our virtual channels, with bus numbers matching channel numbers.
1949 */
1950 chn = sc->mly_controllerinfo->physical_channels_present;
1951 for (i = 0; i < sc->mly_controllerinfo->virtual_channels_present; i++, chn++) {
1952 if ((sc->mly_cam_sim[chn] = cam_sim_alloc(mly_cam_action, mly_cam_poll, "mly", sc,
1953 device_get_unit(sc->mly_dev),
1c8b7a9a 1954 &sim_mplock,
51997c37
PA
1955 sc->mly_controllerinfo->maximum_parallel_commands,
1956 0, devq)) == NULL) {
1957 return(ENOMEM);
1958 }
1959 if (xpt_bus_register(sc->mly_cam_sim[chn], chn)) {
1960 mly_printf(sc, "CAM XPT virtual channel registration failed\n");
1961 return(ENXIO);
1962 }
1963 debug(1, "registered virtual channel %d", chn);
1964 }
1965
1966 /*
1967 * This is the total number of channels that (might have been) registered with
1968 * CAM. Some may not have been; check the mly_cam_sim array to be certain.
1969 */
1970 sc->mly_cam_channels = sc->mly_controllerinfo->physical_channels_present +
1971 sc->mly_controllerinfo->virtual_channels_present;
1972
1973 return(0);
1974}
1975
1976/********************************************************************************
1977 * Detach from CAM
1978 */
1979static void
1980mly_cam_detach(struct mly_softc *sc)
1981{
1982 int i;
1983
1984 debug_called(1);
1985
1986 for (i = 0; i < sc->mly_cam_channels; i++) {
1987 if (sc->mly_cam_sim[i] != NULL) {
1988 xpt_bus_deregister(cam_sim_path(sc->mly_cam_sim[i]));
1989 cam_sim_free(sc->mly_cam_sim[i]);
1990 }
1991 }
1992 if (sc->mly_cam_devq != NULL)
1993 cam_simq_release(sc->mly_cam_devq);
1994}
1995
1996/************************************************************************
1997 * Rescan a device.
1998 */
1999static void
2000mly_cam_rescan_btl(struct mly_softc *sc, int bus, int target)
2001{
2002 union ccb *ccb;
2003
2004 debug_called(1);
2005
2006 ccb = kmalloc(sizeof(union ccb), M_TEMP, M_WAITOK | M_ZERO);
2007
2008 if (xpt_create_path(&sc->mly_cam_path, xpt_periph,
2009 cam_sim_path(sc->mly_cam_sim[bus]), target, 0) != CAM_REQ_CMP) {
2010 mly_printf(sc, "rescan failed (can't create path)\n");
2011 kfree(ccb, M_TEMP);
2012 return;
2013 }
2014 xpt_setup_ccb(&ccb->ccb_h, sc->mly_cam_path, 5/*priority (low)*/);
2015 ccb->ccb_h.func_code = XPT_SCAN_LUN;
2016 ccb->ccb_h.cbfcnp = mly_cam_rescan_callback;
2017 ccb->crcn.flags = CAM_FLAG_NONE;
2018 debug(1, "rescan target %d:%d", bus, target);
2019 xpt_action(ccb);
2020}
2021
2022static void
2023mly_cam_rescan_callback(struct cam_periph *periph, union ccb *ccb)
2024{
2025 kfree(ccb, M_TEMP);
2026}
2027
2028/********************************************************************************
2029 * Handle an action requested by CAM
2030 */
2031static void
2032mly_cam_action(struct cam_sim *sim, union ccb *ccb)
2033{
2034 struct mly_softc *sc = cam_sim_softc(sim);
2035
2036 debug_called(2);
2037
2038 switch (ccb->ccb_h.func_code) {
2039
2040 /* perform SCSI I/O */
2041 case XPT_SCSI_IO:
2042 if (!mly_cam_action_io(sim, (struct ccb_scsiio *)&ccb->csio))
2043 return;
2044 break;
2045
2046 /* perform geometry calculations */
2047 case XPT_CALC_GEOMETRY:
2048 {
2049 struct ccb_calc_geometry *ccg = &ccb->ccg;
2050 u_int32_t secs_per_cylinder;
2051
2052 debug(2, "XPT_CALC_GEOMETRY %d:%d:%d", cam_sim_bus(sim), ccb->ccb_h.target_id, ccb->ccb_h.target_lun);
2053
2054 if (sc->mly_controllerparam->bios_geometry == MLY_BIOSGEOM_8G) {
2055 ccg->heads = 255;
2056 ccg->secs_per_track = 63;
2057 } else { /* MLY_BIOSGEOM_2G */
2058 ccg->heads = 128;
2059 ccg->secs_per_track = 32;
2060 }
2061 secs_per_cylinder = ccg->heads * ccg->secs_per_track;
2062 ccg->cylinders = ccg->volume_size / secs_per_cylinder;
2063 ccb->ccb_h.status = CAM_REQ_CMP;
2064 break;
2065 }
2066
2067 /* handle path attribute inquiry */
2068 case XPT_PATH_INQ:
2069 {
2070 struct ccb_pathinq *cpi = &ccb->cpi;
2071
2072 debug(2, "XPT_PATH_INQ %d:%d:%d", cam_sim_bus(sim), ccb->ccb_h.target_id, ccb->ccb_h.target_lun);
2073
2074 cpi->version_num = 1;
2075 cpi->hba_inquiry = PI_TAG_ABLE; /* XXX extra flags for physical channels? */
2076 cpi->target_sprt = 0;
2077 cpi->hba_misc = 0;
2078 cpi->max_target = MLY_MAX_TARGETS - 1;
2079 cpi->max_lun = MLY_MAX_LUNS - 1;
2080 cpi->initiator_id = sc->mly_controllerparam->initiator_id;
2081 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
2082 strncpy(cpi->hba_vid, "FreeBSD", HBA_IDLEN);
2083 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
2084 cpi->unit_number = cam_sim_unit(sim);
2085 cpi->bus_id = cam_sim_bus(sim);
2086 cpi->base_transfer_speed = 132 * 1024; /* XXX what to set this to? */
51997c37
PA
2087 cpi->transport = XPORT_SPI;
2088 cpi->transport_version = 2;
2089 cpi->protocol = PROTO_SCSI;
2090 cpi->protocol_version = SCSI_REV_2;
51997c37
PA
2091 ccb->ccb_h.status = CAM_REQ_CMP;
2092 break;
2093 }
2094
2095 case XPT_GET_TRAN_SETTINGS:
2096 {
2097 struct ccb_trans_settings *cts = &ccb->cts;
2098 int bus, target;
51997c37
PA
2099 struct ccb_trans_settings_scsi *scsi = &cts->proto_specific.scsi;
2100 struct ccb_trans_settings_spi *spi = &cts->xport_specific.spi;
2101
2102 cts->protocol = PROTO_SCSI;
2103 cts->protocol_version = SCSI_REV_2;
2104 cts->transport = XPORT_SPI;
2105 cts->transport_version = 2;
2106
2107 scsi->flags = 0;
2108 scsi->valid = 0;
2109 spi->flags = 0;
2110 spi->valid = 0;
2111
2112 bus = cam_sim_bus(sim);
2113 target = cts->ccb_h.target_id;
2114 debug(2, "XPT_GET_TRAN_SETTINGS %d:%d", bus, target);
2115 /* logical device? */
2116 if (sc->mly_btl[bus][target].mb_flags & MLY_BTL_LOGICAL) {
2117 /* nothing special for these */
2118 /* physical device? */
2119 } else if (sc->mly_btl[bus][target].mb_flags & MLY_BTL_PHYSICAL) {
2120 /* allow CAM to try tagged transactions */
2121 scsi->flags |= CTS_SCSI_FLAGS_TAG_ENB;
2122 scsi->valid |= CTS_SCSI_VALID_TQ;
2123
2124 /* convert speed (MHz) to usec */
2125 if (sc->mly_btl[bus][target].mb_speed == 0) {
2126 spi->sync_period = 1000000 / 5;
2127 } else {
2128 spi->sync_period = 1000000 / sc->mly_btl[bus][target].mb_speed;
2129 }
2130
2131 /* convert bus width to CAM internal encoding */
2132 switch (sc->mly_btl[bus][target].mb_width) {
2133 case 32:
2134 spi->bus_width = MSG_EXT_WDTR_BUS_32_BIT;
2135 break;
2136 case 16:
2137 spi->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
2138 break;
2139 case 8:
2140 default:
2141 spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
2142 break;
2143 }
2144 spi->valid |= CTS_SPI_VALID_SYNC_RATE | CTS_SPI_VALID_BUS_WIDTH;
2145
2146 /* not a device, bail out */
2147 } else {
2148 cts->ccb_h.status = CAM_REQ_CMP_ERR;
2149 break;
2150 }
2151
2152 /* disconnect always OK */
2153 spi->flags |= CTS_SPI_FLAGS_DISC_ENB;
2154 spi->valid |= CTS_SPI_VALID_DISC;
51997c37
PA
2155
2156 cts->ccb_h.status = CAM_REQ_CMP;
2157 break;
2158 }
2159
2160 default: /* we can't do this */
2161 debug(2, "unsupported func_code = 0x%x", ccb->ccb_h.func_code);
2162 ccb->ccb_h.status = CAM_REQ_INVALID;
2163 break;
2164 }
2165
2166 xpt_done(ccb);
2167}
2168
2169/********************************************************************************
2170 * Handle an I/O operation requested by CAM
2171 */
2172static int
2173mly_cam_action_io(struct cam_sim *sim, struct ccb_scsiio *csio)
2174{
2175 struct mly_softc *sc = cam_sim_softc(sim);
2176 struct mly_command *mc;
2177 struct mly_command_scsi_small *ss;
2178 int bus, target;
2179 int error;
2180
2181 bus = cam_sim_bus(sim);
2182 target = csio->ccb_h.target_id;
2183
2184 debug(2, "XPT_SCSI_IO %d:%d:%d", bus, target, csio->ccb_h.target_lun);
2185
2186 /* validate bus number */
2187 if (!MLY_BUS_IS_VALID(sc, bus)) {
2188 debug(0, " invalid bus %d", bus);
2189 csio->ccb_h.status = CAM_REQ_CMP_ERR;
2190 }
2191
2192 /* check for I/O attempt to a protected device */
2193 if (sc->mly_btl[bus][target].mb_flags & MLY_BTL_PROTECTED) {
2194 debug(2, " device protected");
2195 csio->ccb_h.status = CAM_REQ_CMP_ERR;
2196 }
2197
2198 /* check for I/O attempt to nonexistent device */
2199 if (!(sc->mly_btl[bus][target].mb_flags & (MLY_BTL_LOGICAL | MLY_BTL_PHYSICAL))) {
2200 debug(2, " device %d:%d does not exist", bus, target);
2201 csio->ccb_h.status = CAM_REQ_CMP_ERR;
2202 }
2203
2204 /* XXX increase if/when we support large SCSI commands */
2205 if (csio->cdb_len > MLY_CMD_SCSI_SMALL_CDB) {
2206 debug(0, " command too large (%d > %d)", csio->cdb_len, MLY_CMD_SCSI_SMALL_CDB);
2207 csio->ccb_h.status = CAM_REQ_CMP_ERR;
2208 }
2209
2210 /* check that the CDB pointer is not to a physical address */
2211 if ((csio->ccb_h.flags & CAM_CDB_POINTER) && (csio->ccb_h.flags & CAM_CDB_PHYS)) {
2212 debug(0, " CDB pointer is to physical address");
2213 csio->ccb_h.status = CAM_REQ_CMP_ERR;
2214 }
2215
2216 /* if there is data transfer, it must be to/from a virtual address */
2217 if ((csio->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
2218 if (csio->ccb_h.flags & CAM_DATA_PHYS) { /* we can't map it */
2219 debug(0, " data pointer is to physical address");
2220 csio->ccb_h.status = CAM_REQ_CMP_ERR;
2221 }
2222 if (csio->ccb_h.flags & CAM_SCATTER_VALID) { /* we want to do the s/g setup */
2223 debug(0, " data has premature s/g setup");
2224 csio->ccb_h.status = CAM_REQ_CMP_ERR;
2225 }
2226 }
2227
2228 /* abandon aborted ccbs or those that have failed validation */
2229 if ((csio->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_INPROG) {
2230 debug(2, "abandoning CCB due to abort/validation failure");
2231 return(EINVAL);
2232 }
2233
2234 /*
2235 * Get a command, or push the ccb back to CAM and freeze the queue.
2236 */
2237 if ((error = mly_alloc_command(sc, &mc))) {
2238 crit_enter();
2239 xpt_freeze_simq(sim, 1);
2240 csio->ccb_h.status |= CAM_REQUEUE_REQ;
2241 sc->mly_qfrzn_cnt++;
2242 crit_exit();
2243 return(error);
2244 }
2245
2246 /* build the command */
2247 mc->mc_data = csio->data_ptr;
2248 mc->mc_length = csio->dxfer_len;
2249 mc->mc_complete = mly_cam_complete;
2250 mc->mc_private = csio;
2251
2252 /* save the bus number in the ccb for later recovery XXX should be a better way */
2253 csio->ccb_h.sim_priv.entries[0].field = bus;
2254
2255 /* build the packet for the controller */
2256 ss = &mc->mc_packet->scsi_small;
2257 ss->opcode = MDACMD_SCSI;
2258 if (csio->ccb_h.flags & CAM_DIS_DISCONNECT)
2259 ss->command_control.disable_disconnect = 1;
2260 if ((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_OUT)
2261 ss->command_control.data_direction = MLY_CCB_WRITE;
2262 ss->data_size = csio->dxfer_len;
2263 ss->addr.phys.lun = csio->ccb_h.target_lun;
2264 ss->addr.phys.target = csio->ccb_h.target_id;
2265 ss->addr.phys.channel = bus;
2266 if (csio->ccb_h.timeout < (60 * 1000)) {
2267 ss->timeout.value = csio->ccb_h.timeout / 1000;
2268 ss->timeout.scale = MLY_TIMEOUT_SECONDS;
2269 } else if (csio->ccb_h.timeout < (60 * 60 * 1000)) {
2270 ss->timeout.value = csio->ccb_h.timeout / (60 * 1000);
2271 ss->timeout.scale = MLY_TIMEOUT_MINUTES;
2272 } else {
2273 ss->timeout.value = csio->ccb_h.timeout / (60 * 60 * 1000); /* overflow? */
2274 ss->timeout.scale = MLY_TIMEOUT_HOURS;
2275 }
2276 ss->maximum_sense_size = csio->sense_len;
2277 ss->cdb_length = csio->cdb_len;
2278 if (csio->ccb_h.flags & CAM_CDB_POINTER) {
2279 bcopy(csio->cdb_io.cdb_ptr, ss->cdb, csio->cdb_len);
2280 } else {
2281 bcopy(csio->cdb_io.cdb_bytes, ss->cdb, csio->cdb_len);
2282 }
2283
2284 /* give the command to the controller */
2285 if ((error = mly_start(mc))) {
2286 crit_enter();
2287 xpt_freeze_simq(sim, 1);
2288 csio->ccb_h.status |= CAM_REQUEUE_REQ;
2289 sc->mly_qfrzn_cnt++;
2290 crit_exit();
2291 return(error);
2292 }
2293
2294 return(0);
2295}
2296
2297/********************************************************************************
2298 * Check for possibly-completed commands.
2299 */
2300static void
2301mly_cam_poll(struct cam_sim *sim)
2302{
2303 struct mly_softc *sc = cam_sim_softc(sim);
2304
2305 debug_called(2);
2306
2307 mly_done(sc);
2308}
2309
2310/********************************************************************************
2311 * Handle completion of a command - pass results back through the CCB
2312 */
2313static void
2314mly_cam_complete(struct mly_command *mc)
2315{
2316 struct mly_softc *sc = mc->mc_sc;
2317 struct ccb_scsiio *csio = (struct ccb_scsiio *)mc->mc_private;
2318 struct scsi_inquiry_data *inq = (struct scsi_inquiry_data *)csio->data_ptr;
2319 struct mly_btl *btl;
2320 u_int8_t cmd;
2321 int bus, target;
2322
2323 debug_called(2);
2324
2325 csio->scsi_status = mc->mc_status;
2326 switch(mc->mc_status) {
2327 case SCSI_STATUS_OK:
2328 /*
2329 * In order to report logical device type and status, we overwrite
2330 * the result of the INQUIRY command to logical devices.
2331 */
2332 bus = csio->ccb_h.sim_priv.entries[0].field;
2333 target = csio->ccb_h.target_id;
2334 /* XXX validate bus/target? */
2335 if (sc->mly_btl[bus][target].mb_flags & MLY_BTL_LOGICAL) {
2336 if (csio->ccb_h.flags & CAM_CDB_POINTER) {
2337 cmd = *csio->cdb_io.cdb_ptr;
2338 } else {
2339 cmd = csio->cdb_io.cdb_bytes[0];
2340 }
2341 if (cmd == INQUIRY) {
2342 btl = &sc->mly_btl[bus][target];
2343 padstr(inq->vendor, mly_describe_code(mly_table_device_type, btl->mb_type), 8);
2344 padstr(inq->product, mly_describe_code(mly_table_device_state, btl->mb_state), 16);
2345 padstr(inq->revision, "", 4);
2346 }
2347 }
2348
2349 debug(2, "SCSI_STATUS_OK");
2350 csio->ccb_h.status = CAM_REQ_CMP;
2351 break;
2352
2353 case SCSI_STATUS_CHECK_COND:
2354 debug(1, "SCSI_STATUS_CHECK_COND sense %d resid %d", mc->mc_sense, mc->mc_resid);
2355 csio->ccb_h.status = CAM_SCSI_STATUS_ERROR;
2356 bzero(&csio->sense_data, SSD_FULL_SIZE);
2357 bcopy(mc->mc_packet, &csio->sense_data, mc->mc_sense);
2358 csio->sense_len = mc->mc_sense;
2359 csio->ccb_h.status |= CAM_AUTOSNS_VALID;
2360 csio->resid = mc->mc_resid; /* XXX this is a signed value... */
2361 break;
2362
2363 case SCSI_STATUS_BUSY:
2364 debug(1, "SCSI_STATUS_BUSY");
2365 csio->ccb_h.status = CAM_SCSI_BUSY;
2366 break;
2367
2368 default:
2369 debug(1, "unknown status 0x%x", csio->scsi_status);
2370 csio->ccb_h.status = CAM_REQ_CMP_ERR;
2371 break;
2372 }
2373
2374 crit_enter();
2375 if (sc->mly_qfrzn_cnt) {
2376 csio->ccb_h.status |= CAM_RELEASE_SIMQ;
2377 sc->mly_qfrzn_cnt--;
2378 }
2379 crit_exit();
2380
2381 xpt_done((union ccb *)csio);
2382 mly_release_command(mc);
2383}
2384
2385/********************************************************************************
2386 * Find a peripheral attahed at (bus),(target)
2387 */
2388static struct cam_periph *
2389mly_find_periph(struct mly_softc *sc, int bus, int target)
2390{
2391 struct cam_periph *periph;
2392 struct cam_path *path;
2393 int status;
2394
2395 status = xpt_create_path(&path, NULL, cam_sim_path(sc->mly_cam_sim[bus]), target, 0);
2396 if (status == CAM_REQ_CMP) {
2397 periph = cam_periph_find(path, NULL);
2398 xpt_free_path(path);
2399 } else {
2400 periph = NULL;
2401 }
2402 return(periph);
2403}
2404
2405/********************************************************************************
2406 * Name the device at (bus)(target)
2407 */
2408static int
2409mly_name_device(struct mly_softc *sc, int bus, int target)
2410{
2411 struct cam_periph *periph;
2412
2413 if ((periph = mly_find_periph(sc, bus, target)) != NULL) {
2414 ksprintf(sc->mly_btl[bus][target].mb_name, "%s%d", periph->periph_name, periph->unit_number);
2415 return(0);
2416 }
2417 sc->mly_btl[bus][target].mb_name[0] = 0;
2418 return(ENOENT);
2419}
2420
984263bc
MD
2421/********************************************************************************
2422 ********************************************************************************
2423 Hardware Control
2424 ********************************************************************************
2425 ********************************************************************************/
2426
2427/********************************************************************************
2428 * Handshake with the firmware while the card is being initialised.
2429 */
2430static int
2431mly_fwhandshake(struct mly_softc *sc)
2432{
2433 u_int8_t error, param0, param1;
2434 int spinup = 0;
2435
2436 debug_called(1);
2437
2438 /* set HM_STSACK and let the firmware initialise */
2439 MLY_SET_REG(sc, sc->mly_idbr, MLY_HM_STSACK);
2440 DELAY(1000); /* too short? */
2441
2442 /* if HM_STSACK is still true, the controller is initialising */
2443 if (!MLY_IDBR_TRUE(sc, MLY_HM_STSACK))
2444 return(0);
2445 mly_printf(sc, "controller initialisation started\n");
2446
2447 /* spin waiting for initialisation to finish, or for a message to be delivered */
2448 while (MLY_IDBR_TRUE(sc, MLY_HM_STSACK)) {
2449 /* check for a message */
2450 if (MLY_ERROR_VALID(sc)) {
2451 error = MLY_GET_REG(sc, sc->mly_error_status) & ~MLY_MSG_EMPTY;
2452 param0 = MLY_GET_REG(sc, sc->mly_command_mailbox);
2453 param1 = MLY_GET_REG(sc, sc->mly_command_mailbox + 1);
2454
2455 switch(error) {
2456 case MLY_MSG_SPINUP:
2457 if (!spinup) {
2458 mly_printf(sc, "drive spinup in progress\n");
2459 spinup = 1; /* only print this once (should print drive being spun?) */
2460 }
2461 break;
2462 case MLY_MSG_RACE_RECOVERY_FAIL:
2463 mly_printf(sc, "mirror race recovery failed, one or more drives offline\n");
2464 break;
2465 case MLY_MSG_RACE_IN_PROGRESS:
2466 mly_printf(sc, "mirror race recovery in progress\n");
2467 break;
2468 case MLY_MSG_RACE_ON_CRITICAL:
2469 mly_printf(sc, "mirror race recovery on a critical drive\n");
2470 break;
2471 case MLY_MSG_PARITY_ERROR:
2472 mly_printf(sc, "FATAL MEMORY PARITY ERROR\n");
2473 return(ENXIO);
2474 default:
2475 mly_printf(sc, "unknown initialisation code 0x%x\n", error);
2476 }
2477 }
2478 }
2479 return(0);
2480}
2481
2482/********************************************************************************
2483 ********************************************************************************
2484 Debugging and Diagnostics
2485 ********************************************************************************
2486 ********************************************************************************/
2487
2488/********************************************************************************
2489 * Print some information about the controller.
2490 */
2491static void
2492mly_describe_controller(struct mly_softc *sc)
2493{
2494 struct mly_ioctl_getcontrollerinfo *mi = sc->mly_controllerinfo;
2495
2496 mly_printf(sc, "%16s, %d channel%s, firmware %d.%02d-%d-%02d (%02d%02d%02d%02d), %dMB RAM\n",
2497 mi->controller_name, mi->physical_channels_present, (mi->physical_channels_present) > 1 ? "s" : "",
2498 mi->fw_major, mi->fw_minor, mi->fw_turn, mi->fw_build, /* XXX turn encoding? */
2499 mi->fw_century, mi->fw_year, mi->fw_month, mi->fw_day,
2500 mi->memory_size);
2501
2502 if (bootverbose) {
2503 mly_printf(sc, "%s %s (%x), %dMHz %d-bit %.16s\n",
2504 mly_describe_code(mly_table_oemname, mi->oem_information),
2505 mly_describe_code(mly_table_controllertype, mi->controller_type), mi->controller_type,
2506 mi->interface_speed, mi->interface_width, mi->interface_name);
2507 mly_printf(sc, "%dMB %dMHz %d-bit %s%s%s, cache %dMB\n",
2508 mi->memory_size, mi->memory_speed, mi->memory_width,
2509 mly_describe_code(mly_table_memorytype, mi->memory_type),
2510 mi->memory_parity ? "+parity": "",mi->memory_ecc ? "+ECC": "",
2511 mi->cache_size);
2512 mly_printf(sc, "CPU: %s @ %dMHZ\n",
2513 mly_describe_code(mly_table_cputype, mi->cpu[0].type), mi->cpu[0].speed);
2514 if (mi->l2cache_size != 0)
2515 mly_printf(sc, "%dKB L2 cache\n", mi->l2cache_size);
2516 if (mi->exmemory_size != 0)
2517 mly_printf(sc, "%dMB %dMHz %d-bit private %s%s%s\n",
2518 mi->exmemory_size, mi->exmemory_speed, mi->exmemory_width,
2519 mly_describe_code(mly_table_memorytype, mi->exmemory_type),
2520 mi->exmemory_parity ? "+parity": "",mi->exmemory_ecc ? "+ECC": "");
2521 mly_printf(sc, "battery backup %s\n", mi->bbu_present ? "present" : "not installed");
2522 mly_printf(sc, "maximum data transfer %d blocks, maximum sg entries/command %d\n",
2523 mi->maximum_block_count, mi->maximum_sg_entries);
2524 mly_printf(sc, "logical devices present/critical/offline %d/%d/%d\n",
2525 mi->logical_devices_present, mi->logical_devices_critical, mi->logical_devices_offline);
2526 mly_printf(sc, "physical devices present %d\n",
2527 mi->physical_devices_present);
2528 mly_printf(sc, "physical disks present/offline %d/%d\n",
2529 mi->physical_disks_present, mi->physical_disks_offline);
2530 mly_printf(sc, "%d physical channel%s, %d virtual channel%s of %d possible\n",
2531 mi->physical_channels_present, mi->physical_channels_present == 1 ? "" : "s",
2532 mi->virtual_channels_present, mi->virtual_channels_present == 1 ? "" : "s",
2533 mi->virtual_channels_possible);
2534 mly_printf(sc, "%d parallel commands supported\n", mi->maximum_parallel_commands);
2535 mly_printf(sc, "%dMB flash ROM, %d of %d maximum cycles\n",
2536 mi->flash_size, mi->flash_age, mi->flash_maximum_age);
2537 }
2538}
2539
2540#ifdef MLY_DEBUG
2541/********************************************************************************
2542 * Print some controller state
2543 */
2544static void
2545mly_printstate(struct mly_softc *sc)
2546{
2547 mly_printf(sc, "IDBR %02x ODBR %02x ERROR %02x (%x %x %x)\n",
2548 MLY_GET_REG(sc, sc->mly_idbr),
2549 MLY_GET_REG(sc, sc->mly_odbr),
2550 MLY_GET_REG(sc, sc->mly_error_status),
2551 sc->mly_idbr,
2552 sc->mly_odbr,
2553 sc->mly_error_status);
2554 mly_printf(sc, "IMASK %02x ISTATUS %02x\n",
2555 MLY_GET_REG(sc, sc->mly_interrupt_mask),
2556 MLY_GET_REG(sc, sc->mly_interrupt_status));
2557 mly_printf(sc, "COMMAND %02x %02x %02x %02x %02x %02x %02x %02x\n",
2558 MLY_GET_REG(sc, sc->mly_command_mailbox),
2559 MLY_GET_REG(sc, sc->mly_command_mailbox + 1),
2560 MLY_GET_REG(sc, sc->mly_command_mailbox + 2),
2561 MLY_GET_REG(sc, sc->mly_command_mailbox + 3),
2562 MLY_GET_REG(sc, sc->mly_command_mailbox + 4),
2563 MLY_GET_REG(sc, sc->mly_command_mailbox + 5),
2564 MLY_GET_REG(sc, sc->mly_command_mailbox + 6),
2565 MLY_GET_REG(sc, sc->mly_command_mailbox + 7));
2566 mly_printf(sc, "STATUS %02x %02x %02x %02x %02x %02x %02x %02x\n",
2567 MLY_GET_REG(sc, sc->mly_status_mailbox),
2568 MLY_GET_REG(sc, sc->mly_status_mailbox + 1),
2569 MLY_GET_REG(sc, sc->mly_status_mailbox + 2),
2570 MLY_GET_REG(sc, sc->mly_status_mailbox + 3),
2571 MLY_GET_REG(sc, sc->mly_status_mailbox + 4),
2572 MLY_GET_REG(sc, sc->mly_status_mailbox + 5),
2573 MLY_GET_REG(sc, sc->mly_status_mailbox + 6),
2574 MLY_GET_REG(sc, sc->mly_status_mailbox + 7));
2575 mly_printf(sc, " %04x %08x\n",
2576 MLY_GET_REG2(sc, sc->mly_status_mailbox),
2577 MLY_GET_REG4(sc, sc->mly_status_mailbox + 4));
2578}
2579
2580struct mly_softc *mly_softc0 = NULL;
2581void
2582mly_printstate0(void)
2583{
2584 if (mly_softc0 != NULL)
2585 mly_printstate(mly_softc0);
2586}
2587
2588/********************************************************************************
2589 * Print a command
2590 */
2591static void
2592mly_print_command(struct mly_command *mc)
2593{
2594 struct mly_softc *sc = mc->mc_sc;
2595
2596 mly_printf(sc, "COMMAND @ %p\n", mc);
2597 mly_printf(sc, " slot %d\n", mc->mc_slot);
2598 mly_printf(sc, " status 0x%x\n", mc->mc_status);
2599 mly_printf(sc, " sense len %d\n", mc->mc_sense);
2600 mly_printf(sc, " resid %d\n", mc->mc_resid);
2601 mly_printf(sc, " packet %p/0x%llx\n", mc->mc_packet, mc->mc_packetphys);
2602 if (mc->mc_packet != NULL)
2603 mly_print_packet(mc);
2604 mly_printf(sc, " data %p/%d\n", mc->mc_data, mc->mc_length);
2605 mly_printf(sc, " flags %b\n", mc->mc_flags, "\20\1busy\2complete\3slotted\4mapped\5datain\6dataout\n");
2606 mly_printf(sc, " complete %p\n", mc->mc_complete);
2607 mly_printf(sc, " private %p\n", mc->mc_private);
2608}
2609
2610/********************************************************************************
2611 * Print a command packet
2612 */
2613static void
2614mly_print_packet(struct mly_command *mc)
2615{
2616 struct mly_softc *sc = mc->mc_sc;
2617 struct mly_command_generic *ge = (struct mly_command_generic *)mc->mc_packet;
2618 struct mly_command_scsi_small *ss = (struct mly_command_scsi_small *)mc->mc_packet;
2619 struct mly_command_scsi_large *sl = (struct mly_command_scsi_large *)mc->mc_packet;
2620 struct mly_command_ioctl *io = (struct mly_command_ioctl *)mc->mc_packet;
2621 int transfer;
2622
2623 mly_printf(sc, " command_id %d\n", ge->command_id);
2624 mly_printf(sc, " opcode %d\n", ge->opcode);
2625 mly_printf(sc, " command_control fua %d dpo %d est %d dd %s nas %d ddis %d\n",
2626 ge->command_control.force_unit_access,
2627 ge->command_control.disable_page_out,
2628 ge->command_control.extended_sg_table,
2629 (ge->command_control.data_direction == MLY_CCB_WRITE) ? "WRITE" : "READ",
2630 ge->command_control.no_auto_sense,
2631 ge->command_control.disable_disconnect);
2632 mly_printf(sc, " data_size %d\n", ge->data_size);
2633 mly_printf(sc, " sense_buffer_address 0x%llx\n", ge->sense_buffer_address);
2634 mly_printf(sc, " lun %d\n", ge->addr.phys.lun);
2635 mly_printf(sc, " target %d\n", ge->addr.phys.target);
2636 mly_printf(sc, " channel %d\n", ge->addr.phys.channel);
2637 mly_printf(sc, " logical device %d\n", ge->addr.log.logdev);
2638 mly_printf(sc, " controller %d\n", ge->addr.phys.controller);
2639 mly_printf(sc, " timeout %d %s\n",
2640 ge->timeout.value,
2641 (ge->timeout.scale == MLY_TIMEOUT_SECONDS) ? "seconds" :
2642 ((ge->timeout.scale == MLY_TIMEOUT_MINUTES) ? "minutes" : "hours"));
2643 mly_printf(sc, " maximum_sense_size %d\n", ge->maximum_sense_size);
2644 switch(ge->opcode) {
2645 case MDACMD_SCSIPT:
2646 case MDACMD_SCSI:
2647 mly_printf(sc, " cdb length %d\n", ss->cdb_length);
2648 mly_printf(sc, " cdb %*D\n", ss->cdb_length, ss->cdb, " ");
2649 transfer = 1;
2650 break;
2651 case MDACMD_SCSILC:
2652 case MDACMD_SCSILCPT:
2653 mly_printf(sc, " cdb length %d\n", sl->cdb_length);
2654 mly_printf(sc, " cdb 0x%llx\n", sl->cdb_physaddr);
2655 transfer = 1;
2656 break;
2657 case MDACMD_IOCTL:
2658 mly_printf(sc, " sub_ioctl 0x%x\n", io->sub_ioctl);
2659 switch(io->sub_ioctl) {
2660 case MDACIOCTL_SETMEMORYMAILBOX:
2661 mly_printf(sc, " health_buffer_size %d\n",
2662 io->param.setmemorymailbox.health_buffer_size);
2663 mly_printf(sc, " health_buffer_phys 0x%llx\n",
2664 io->param.setmemorymailbox.health_buffer_physaddr);
2665 mly_printf(sc, " command_mailbox 0x%llx\n",
2666 io->param.setmemorymailbox.command_mailbox_physaddr);
2667 mly_printf(sc, " status_mailbox 0x%llx\n",
2668 io->param.setmemorymailbox.status_mailbox_physaddr);
2669 transfer = 0;
2670 break;
2671
2672 case MDACIOCTL_SETREALTIMECLOCK:
2673 case MDACIOCTL_GETHEALTHSTATUS:
2674 case MDACIOCTL_GETCONTROLLERINFO:
2675 case MDACIOCTL_GETLOGDEVINFOVALID:
2676 case MDACIOCTL_GETPHYSDEVINFOVALID:
2677 case MDACIOCTL_GETPHYSDEVSTATISTICS:
2678 case MDACIOCTL_GETLOGDEVSTATISTICS:
2679 case MDACIOCTL_GETCONTROLLERSTATISTICS:
2680 case MDACIOCTL_GETBDT_FOR_SYSDRIVE:
2681 case MDACIOCTL_CREATENEWCONF:
2682 case MDACIOCTL_ADDNEWCONF:
2683 case MDACIOCTL_GETDEVCONFINFO:
2684 case MDACIOCTL_GETFREESPACELIST:
2685 case MDACIOCTL_MORE:
2686 case MDACIOCTL_SETPHYSDEVPARAMETER:
2687 case MDACIOCTL_GETPHYSDEVPARAMETER:
2688 case MDACIOCTL_GETLOGDEVPARAMETER:
2689 case MDACIOCTL_SETLOGDEVPARAMETER:
2690 mly_printf(sc, " param %10D\n", io->param.data.param, " ");
2691 transfer = 1;
2692 break;
2693
2694 case MDACIOCTL_GETEVENT:
2695 mly_printf(sc, " event %d\n",
2696 io->param.getevent.sequence_number_low + ((u_int32_t)io->addr.log.logdev << 16));
2697 transfer = 1;
2698 break;
2699
2700 case MDACIOCTL_SETRAIDDEVSTATE:
2701 mly_printf(sc, " state %d\n", io->param.setraiddevstate.state);
2702 transfer = 0;
2703 break;
2704
2705 case MDACIOCTL_XLATEPHYSDEVTORAIDDEV:
2706 mly_printf(sc, " raid_device %d\n", io->param.xlatephysdevtoraiddev.raid_device);
2707 mly_printf(sc, " controller %d\n", io->param.xlatephysdevtoraiddev.controller);
2708 mly_printf(sc, " channel %d\n", io->param.xlatephysdevtoraiddev.channel);
2709 mly_printf(sc, " target %d\n", io->param.xlatephysdevtoraiddev.target);
2710 mly_printf(sc, " lun %d\n", io->param.xlatephysdevtoraiddev.lun);
2711 transfer = 0;
2712 break;
2713
2714 case MDACIOCTL_GETGROUPCONFINFO:
2715 mly_printf(sc, " group %d\n", io->param.getgroupconfinfo.group);
2716 transfer = 1;
2717 break;
2718
2719 case MDACIOCTL_GET_SUBSYSTEM_DATA:
2720 case MDACIOCTL_SET_SUBSYSTEM_DATA:
2721 case MDACIOCTL_STARTDISOCVERY:
2722 case MDACIOCTL_INITPHYSDEVSTART:
2723 case MDACIOCTL_INITPHYSDEVSTOP:
2724 case MDACIOCTL_INITRAIDDEVSTART:
2725 case MDACIOCTL_INITRAIDDEVSTOP:
2726 case MDACIOCTL_REBUILDRAIDDEVSTART:
2727 case MDACIOCTL_REBUILDRAIDDEVSTOP:
2728 case MDACIOCTL_MAKECONSISTENTDATASTART:
2729 case MDACIOCTL_MAKECONSISTENTDATASTOP:
2730 case MDACIOCTL_CONSISTENCYCHECKSTART:
2731 case MDACIOCTL_CONSISTENCYCHECKSTOP:
2732 case MDACIOCTL_RESETDEVICE:
2733 case MDACIOCTL_FLUSHDEVICEDATA:
2734 case MDACIOCTL_PAUSEDEVICE:
2735 case MDACIOCTL_UNPAUSEDEVICE:
2736 case MDACIOCTL_LOCATEDEVICE:
2737 case MDACIOCTL_SETMASTERSLAVEMODE:
2738 case MDACIOCTL_DELETERAIDDEV:
2739 case MDACIOCTL_REPLACEINTERNALDEV:
2740 case MDACIOCTL_CLEARCONF:
2741 case MDACIOCTL_GETCONTROLLERPARAMETER:
2742 case MDACIOCTL_SETCONTRLLERPARAMETER:
2743 case MDACIOCTL_CLEARCONFSUSPMODE:
2744 case MDACIOCTL_STOREIMAGE:
2745 case MDACIOCTL_READIMAGE:
2746 case MDACIOCTL_FLASHIMAGES:
2747 case MDACIOCTL_RENAMERAIDDEV:
2748 default: /* no idea what to print */
2749 transfer = 0;
2750 break;
2751 }
2752 break;
2753
2754 case MDACMD_IOCTLCHECK:
2755 case MDACMD_MEMCOPY:
2756 default:
2757 transfer = 0;
2758 break; /* print nothing */
2759 }
2760 if (transfer) {
2761 if (ge->command_control.extended_sg_table) {
2762 mly_printf(sc, " sg table 0x%llx/%d\n",
2763 ge->transfer.indirect.table_physaddr[0], ge->transfer.indirect.entries[0]);
2764 } else {
2765 mly_printf(sc, " 0000 0x%llx/%lld\n",
2766 ge->transfer.direct.sg[0].physaddr, ge->transfer.direct.sg[0].length);
2767 mly_printf(sc, " 0001 0x%llx/%lld\n",
2768 ge->transfer.direct.sg[1].physaddr, ge->transfer.direct.sg[1].length);
2769 }
2770 }
2771}
2772
2773/********************************************************************************
2774 * Panic in a slightly informative fashion
2775 */
2776static void
2777mly_panic(struct mly_softc *sc, char *reason)
2778{
2779 mly_printstate(sc);
2780 panic(reason);
2781}
984263bc
MD
2782
2783/********************************************************************************
2784 * Print queue statistics, callable from DDB.
2785 */
2786void
2787mly_print_controller(int controller)
2788{
2789 struct mly_softc *sc;
2790
2791 if ((sc = devclass_get_softc(devclass_find("mly"), controller)) == NULL) {
e3869ec7 2792 kprintf("mly: controller %d invalid\n", controller);
984263bc
MD
2793 } else {
2794 device_printf(sc->mly_dev, "queue curr max\n");
2795 device_printf(sc->mly_dev, "free %04d/%04d\n",
2796 sc->mly_qstat[MLYQ_FREE].q_length, sc->mly_qstat[MLYQ_FREE].q_max);
984263bc
MD
2797 device_printf(sc->mly_dev, "busy %04d/%04d\n",
2798 sc->mly_qstat[MLYQ_BUSY].q_length, sc->mly_qstat[MLYQ_BUSY].q_max);
2799 device_printf(sc->mly_dev, "complete %04d/%04d\n",
2800 sc->mly_qstat[MLYQ_COMPLETE].q_length, sc->mly_qstat[MLYQ_COMPLETE].q_max);
2801 }
2802}
51997c37 2803#endif
984263bc
MD
2804
2805
2806/********************************************************************************
2807 ********************************************************************************
2808 Control device interface
2809 ********************************************************************************
2810 ********************************************************************************/
2811
2812/********************************************************************************
2813 * Accept an open operation on the control device.
2814 */
2815static int
fef8985e 2816mly_user_open(struct dev_open_args *ap)
984263bc 2817{
b13267a5 2818 cdev_t dev = ap->a_head.a_dev;
984263bc
MD
2819 int unit = minor(dev);
2820 struct mly_softc *sc = devclass_get_softc(devclass_find("mly"), unit);
2821
2822 sc->mly_state |= MLY_STATE_OPEN;
2823 return(0);
2824}
2825
2826/********************************************************************************
2827 * Accept the last close on the control device.
2828 */
2829static int
fef8985e 2830mly_user_close(struct dev_close_args *ap)
984263bc 2831{
b13267a5 2832 cdev_t dev = ap->a_head.a_dev;
984263bc
MD
2833 int unit = minor(dev);
2834 struct mly_softc *sc = devclass_get_softc(devclass_find("mly"), unit);
2835
2836 sc->mly_state &= ~MLY_STATE_OPEN;
2837 return (0);
2838}
2839
2840/********************************************************************************
2841 * Handle controller-specific control operations.
2842 */
2843static int
fef8985e 2844mly_user_ioctl(struct dev_ioctl_args *ap)
984263bc 2845{
b13267a5 2846 cdev_t dev = ap->a_head.a_dev;
984263bc 2847 struct mly_softc *sc = (struct mly_softc *)dev->si_drv1;
fef8985e
MD
2848 struct mly_user_command *uc = (struct mly_user_command *)ap->a_data;
2849 struct mly_user_health *uh = (struct mly_user_health *)ap->a_data;
984263bc 2850
fef8985e 2851 switch(ap->a_cmd) {
984263bc
MD
2852 case MLYIO_COMMAND:
2853 return(mly_user_command(sc, uc));
2854 case MLYIO_HEALTH:
2855 return(mly_user_health(sc, uh));
2856 default:
2857 return(ENOIOCTL);
2858 }
2859}
2860
2861/********************************************************************************
2862 * Execute a command passed in from userspace.
2863 *
2864 * The control structure contains the actual command for the controller, as well
2865 * as the user-space data pointer and data size, and an optional sense buffer
2866 * size/pointer. On completion, the data size is adjusted to the command
2867 * residual, and the sense buffer size to the size of the returned sense data.
2868 *
2869 */
2870static int
2871mly_user_command(struct mly_softc *sc, struct mly_user_command *uc)
2872{
51997c37
PA
2873 struct mly_command *mc;
2874 int error;
984263bc
MD
2875
2876 /* allocate a command */
2877 if (mly_alloc_command(sc, &mc)) {
2878 error = ENOMEM;
2879 goto out; /* XXX Linux version will wait for a command */
2880 }
2881
2882 /* handle data size/direction */
2883 mc->mc_length = (uc->DataTransferLength >= 0) ? uc->DataTransferLength : -uc->DataTransferLength;
076ae0ab 2884 if (mc->mc_length > 0)
efda3bd0 2885 mc->mc_data = kmalloc(mc->mc_length, M_DEVBUF, M_INTWAIT);
984263bc
MD
2886 if (uc->DataTransferLength > 0) {
2887 mc->mc_flags |= MLY_CMD_DATAIN;
2888 bzero(mc->mc_data, mc->mc_length);
2889 }
2890 if (uc->DataTransferLength < 0) {
2891 mc->mc_flags |= MLY_CMD_DATAOUT;
2892 if ((error = copyin(uc->DataTransferBuffer, mc->mc_data, mc->mc_length)) != 0)
2893 goto out;
2894 }
2895
2896 /* copy the controller command */
2897 bcopy(&uc->CommandMailbox, mc->mc_packet, sizeof(uc->CommandMailbox));
2898
2899 /* clear command completion handler so that we get woken up */
2900 mc->mc_complete = NULL;
2901
2902 /* execute the command */
51997c37
PA
2903 if ((error = mly_start(mc)) != 0)
2904 goto out;
5eb77fd5 2905 crit_enter();
984263bc 2906 while (!(mc->mc_flags & MLY_CMD_COMPLETE))
377d4740 2907 tsleep(mc, 0, "mlyioctl", 0);
5eb77fd5 2908 crit_exit();
984263bc
MD
2909
2910 /* return the data to userspace */
2911 if (uc->DataTransferLength > 0)
2912 if ((error = copyout(mc->mc_data, uc->DataTransferBuffer, mc->mc_length)) != 0)
2913 goto out;
2914
2915 /* return the sense buffer to userspace */
2916 if ((uc->RequestSenseLength > 0) && (mc->mc_sense > 0)) {
2917 if ((error = copyout(mc->mc_packet, uc->RequestSenseBuffer,
2918 min(uc->RequestSenseLength, mc->mc_sense))) != 0)
2919 goto out;
2920 }
2921
2922 /* return command results to userspace (caller will copy out) */
2923 uc->DataTransferLength = mc->mc_resid;
2924 uc->RequestSenseLength = min(uc->RequestSenseLength, mc->mc_sense);
2925 uc->CommandStatus = mc->mc_status;
2926 error = 0;
2927
2928 out:
2929 if (mc->mc_data != NULL)
efda3bd0 2930 kfree(mc->mc_data, M_DEVBUF);
984263bc
MD
2931 if (mc != NULL)
2932 mly_release_command(mc);
2933 return(error);
2934}
2935
2936/********************************************************************************
2937 * Return health status to userspace. If the health change index in the user
2938 * structure does not match that currently exported by the controller, we
2939 * return the current status immediately. Otherwise, we block until either
2940 * interrupted or new status is delivered.
2941 */
2942static int
2943mly_user_health(struct mly_softc *sc, struct mly_user_health *uh)
2944{
2945 struct mly_health_status mh;
5eb77fd5 2946 int error;
984263bc
MD
2947
2948 /* fetch the current health status from userspace */
2949 if ((error = copyin(uh->HealthStatusBuffer, &mh, sizeof(mh))) != 0)
2950 return(error);
2951
2952 /* spin waiting for a status update */
5eb77fd5 2953 crit_enter();
984263bc
MD
2954 error = EWOULDBLOCK;
2955 while ((error != 0) && (sc->mly_event_change == mh.change_counter))
377d4740 2956 error = tsleep(&sc->mly_event_change, PCATCH, "mlyhealth", 0);
5eb77fd5 2957 crit_exit();
984263bc
MD
2958
2959 /* copy the controller's health status buffer out (there is a race here if it changes again) */
2960 error = copyout(&sc->mly_mmbox->mmm_health.status, uh->HealthStatusBuffer,
2961 sizeof(uh->HealthStatusBuffer));
2962 return(error);
2963}
51997c37
PA
2964
2965static int
2966mly_timeout(struct mly_softc *sc)
2967{
2968 struct mly_command *mc;
2969 int deadline;
2970
2971 deadline = time_second - MLY_CMD_TIMEOUT;
2972 TAILQ_FOREACH(mc, &sc->mly_busy, mc_link) {
2973 if ((mc->mc_timestamp < deadline)) {
2974 device_printf(sc->mly_dev,
2975 "COMMAND %p TIMEOUT AFTER %d SECONDS\n", mc,
2976 (int)(time_second - mc->mc_timestamp));
2977 }
2978 }
2979
2980 callout_reset(&sc->mly_timeout, MLY_CMD_TIMEOUT * hz,
2981 (timeout_t *)mly_timeout, sc);
2982
2983 return (0);
2984}