1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * PS3 device registration routines.
4 *
5 * Copyright (C) 2007 Sony Computer Entertainment Inc.
6 * Copyright 2007 Sony Corp.
7 */
8
9 #include <linux/delay.h>
10 #include <linux/freezer.h>
11 #include <linux/kernel.h>
12 #include <linux/kthread.h>
13 #include <linux/init.h>
14 #include <linux/slab.h>
15 #include <linux/reboot.h>
16 #include <linux/rcuwait.h>
17
18 #include <asm/firmware.h>
19 #include <asm/lv1call.h>
20 #include <asm/ps3stor.h>
21
22 #include "platform.h"
23
24 static int __init ps3_register_lpm_devices(void)
25 {
26 int result;
27 u64 tmp1;
28 u64 tmp2;
29 struct ps3_system_bus_device *dev;
30
31 pr_debug(" -> %s:%d\n", __func__, __LINE__);
32
33 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
34 if (!dev)
35 return -ENOMEM;
36
37 dev->match_id = PS3_MATCH_ID_LPM;
38 dev->dev_type = PS3_DEVICE_TYPE_LPM;
39
40 /* The current lpm driver only supports a single BE processor. */
41
42 result = ps3_repository_read_be_node_id(0, &dev->lpm.node_id);
43
44 if (result) {
45 pr_debug("%s:%d: ps3_repository_read_be_node_id failed \n",
46 __func__, __LINE__);
47 goto fail_read_repo;
48 }
49
50 result = ps3_repository_read_lpm_privileges(dev->lpm.node_id, &tmp1,
51 &dev->lpm.rights);
52
53 if (result) {
54 pr_debug("%s:%d: ps3_repository_read_lpm_privileges failed\n",
55 __func__, __LINE__);
56 goto fail_read_repo;
57 }
58
59 lv1_get_logical_partition_id(&tmp2);
60
61 if (tmp1 != tmp2) {
62 pr_debug("%s:%d: wrong lpar\n",
63 __func__, __LINE__);
64 result = -ENODEV;
65 goto fail_rights;
66 }
67
68 if (!(dev->lpm.rights & PS3_LPM_RIGHTS_USE_LPM)) {
69 pr_debug("%s:%d: don't have rights to use lpm\n",
70 __func__, __LINE__);
71 result = -EPERM;
72 goto fail_rights;
73 }
74
75 pr_debug("%s:%d: pu_id %llu, rights %llu(%llxh)\n",
76 __func__, __LINE__, dev->lpm.pu_id, dev->lpm.rights,
77 dev->lpm.rights);
78
79 result = ps3_repository_read_pu_id(0, &dev->lpm.pu_id);
80
81 if (result) {
82 pr_debug("%s:%d: ps3_repository_read_pu_id failed \n",
83 __func__, __LINE__);
84 goto fail_read_repo;
85 }
86
87 result = ps3_system_bus_device_register(dev);
88
89 if (result) {
90 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
91 __func__, __LINE__);
92 goto fail_register;
93 }
94
95 pr_debug(" <- %s:%d\n", __func__, __LINE__);
96 return 0;
97
98
99 fail_register:
100 fail_rights:
101 fail_read_repo:
102 kfree(dev);
103 pr_debug(" <- %s:%d: failed\n", __func__, __LINE__);
104 return result;
105 }
106
107 /**
108 * ps3_setup_gelic_device - Setup and register a gelic device instance.
109 *
110 * Allocates memory for a struct ps3_system_bus_device instance, initialises the
111 * structure members, and registers the device instance with the system bus.
112 */
113
114 static int __init ps3_setup_gelic_device(
115 const struct ps3_repository_device *repo)
116 {
117 int result;
118 struct layout {
119 struct ps3_system_bus_device dev;
120 struct ps3_dma_region d_region;
121 } *p;
122
123 pr_debug(" -> %s:%d\n", __func__, __LINE__);
124
125 BUG_ON(repo->bus_type != PS3_BUS_TYPE_SB);
126 BUG_ON(repo->dev_type != PS3_DEV_TYPE_SB_GELIC);
127
128 p = kzalloc(sizeof(struct layout), GFP_KERNEL);
129
130 if (!p) {
131 result = -ENOMEM;
132 goto fail_malloc;
133 }
134
135 p->dev.match_id = PS3_MATCH_ID_GELIC;
136 p->dev.dev_type = PS3_DEVICE_TYPE_SB;
137 p->dev.bus_id = repo->bus_id;
138 p->dev.dev_id = repo->dev_id;
139 p->dev.d_region = &p->d_region;
140
141 result = ps3_repository_find_interrupt(repo,
142 PS3_INTERRUPT_TYPE_EVENT_PORT, &p->dev.interrupt_id);
143
144 if (result) {
145 pr_debug("%s:%d ps3_repository_find_interrupt failed\n",
146 __func__, __LINE__);
147 goto fail_find_interrupt;
148 }
149
150 BUG_ON(p->dev.interrupt_id != 0);
151
152 result = ps3_dma_region_init(&p->dev, p->dev.d_region, PS3_DMA_64K,
153 PS3_DMA_OTHER, NULL, 0);
154
155 if (result) {
156 pr_debug("%s:%d ps3_dma_region_init failed\n",
157 __func__, __LINE__);
158 goto fail_dma_init;
159 }
160
161 result = ps3_system_bus_device_register(&p->dev);
162
163 if (result) {
164 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
165 __func__, __LINE__);
166 goto fail_device_register;
167 }
168
169 pr_debug(" <- %s:%d\n", __func__, __LINE__);
170 return result;
171
172 fail_device_register:
173 fail_dma_init:
174 fail_find_interrupt:
175 kfree(p);
176 fail_malloc:
177 pr_debug(" <- %s:%d: fail.\n", __func__, __LINE__);
178 return result;
179 }
180
181 static int __ref ps3_setup_uhc_device(
182 const struct ps3_repository_device *repo, enum ps3_match_id match_id,
183 enum ps3_interrupt_type interrupt_type, enum ps3_reg_type reg_type)
184 {
185 int result;
186 struct layout {
187 struct ps3_system_bus_device dev;
188 struct ps3_dma_region d_region;
189 struct ps3_mmio_region m_region;
190 } *p;
191 u64 bus_addr;
192 u64 len;
193
194 pr_debug(" -> %s:%d\n", __func__, __LINE__);
195
196 BUG_ON(repo->bus_type != PS3_BUS_TYPE_SB);
197 BUG_ON(repo->dev_type != PS3_DEV_TYPE_SB_USB);
198
199 p = kzalloc(sizeof(struct layout), GFP_KERNEL);
200
201 if (!p) {
202 result = -ENOMEM;
203 goto fail_malloc;
204 }
205
206 p->dev.match_id = match_id;
207 p->dev.dev_type = PS3_DEVICE_TYPE_SB;
208 p->dev.bus_id = repo->bus_id;
209 p->dev.dev_id = repo->dev_id;
210 p->dev.d_region = &p->d_region;
211 p->dev.m_region = &p->m_region;
212
213 result = ps3_repository_find_interrupt(repo,
214 interrupt_type, &p->dev.interrupt_id);
215
216 if (result) {
217 pr_debug("%s:%d ps3_repository_find_interrupt failed\n",
218 __func__, __LINE__);
219 goto fail_find_interrupt;
220 }
221
222 result = ps3_repository_find_reg(repo, reg_type,
223 &bus_addr, &len);
224
225 if (result) {
226 pr_debug("%s:%d ps3_repository_find_reg failed\n",
227 __func__, __LINE__);
228 goto fail_find_reg;
229 }
230
231 result = ps3_dma_region_init(&p->dev, p->dev.d_region, PS3_DMA_64K,
232 PS3_DMA_INTERNAL, NULL, 0);
233
234 if (result) {
235 pr_debug("%s:%d ps3_dma_region_init failed\n",
236 __func__, __LINE__);
237 goto fail_dma_init;
238 }
239
240 result = ps3_mmio_region_init(&p->dev, p->dev.m_region, bus_addr, len,
241 PS3_MMIO_4K);
242
243 if (result) {
244 pr_debug("%s:%d ps3_mmio_region_init failed\n",
245 __func__, __LINE__);
246 goto fail_mmio_init;
247 }
248
249 result = ps3_system_bus_device_register(&p->dev);
250
251 if (result) {
252 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
253 __func__, __LINE__);
254 goto fail_device_register;
255 }
256
257 pr_debug(" <- %s:%d\n", __func__, __LINE__);
258 return result;
259
260 fail_device_register:
261 fail_mmio_init:
262 fail_dma_init:
263 fail_find_reg:
264 fail_find_interrupt:
265 kfree(p);
266 fail_malloc:
267 pr_debug(" <- %s:%d: fail.\n", __func__, __LINE__);
268 return result;
269 }
270
271 static int __init ps3_setup_ehci_device(
272 const struct ps3_repository_device *repo)
273 {
274 return ps3_setup_uhc_device(repo, PS3_MATCH_ID_EHCI,
275 PS3_INTERRUPT_TYPE_SB_EHCI, PS3_REG_TYPE_SB_EHCI);
276 }
277
278 static int __init ps3_setup_ohci_device(
279 const struct ps3_repository_device *repo)
280 {
281 return ps3_setup_uhc_device(repo, PS3_MATCH_ID_OHCI,
282 PS3_INTERRUPT_TYPE_SB_OHCI, PS3_REG_TYPE_SB_OHCI);
283 }
284
285 static int __init ps3_setup_vuart_device(enum ps3_match_id match_id,
286 unsigned int port_number)
287 {
288 int result;
289 struct layout {
290 struct ps3_system_bus_device dev;
291 } *p;
292
293 pr_debug(" -> %s:%d: match_id %u, port %u\n", __func__, __LINE__,
294 match_id, port_number);
295
296 p = kzalloc(sizeof(struct layout), GFP_KERNEL);
297
298 if (!p)
299 return -ENOMEM;
300
301 p->dev.match_id = match_id;
302 p->dev.dev_type = PS3_DEVICE_TYPE_VUART;
303 p->dev.port_number = port_number;
304
305 result = ps3_system_bus_device_register(&p->dev);
306
307 if (result) {
308 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
309 __func__, __LINE__);
310 goto fail_device_register;
311 }
312 pr_debug(" <- %s:%d\n", __func__, __LINE__);
313 return 0;
314
315 fail_device_register:
316 kfree(p);
317 pr_debug(" <- %s:%d fail\n", __func__, __LINE__);
318 return result;
319 }
320
321 static int ps3_setup_storage_dev(const struct ps3_repository_device *repo,
322 enum ps3_match_id match_id)
323 {
324 int result;
325 struct ps3_storage_device *p;
326 u64 port, blk_size, num_blocks;
327 unsigned int num_regions, i;
328
329 pr_debug(" -> %s:%u: match_id %u\n", __func__, __LINE__, match_id);
330
331 result = ps3_repository_read_stor_dev_info(repo->bus_index,
332 repo->dev_index, &port,
333 &blk_size, &num_blocks,
334 &num_regions);
335 if (result) {
336 printk(KERN_ERR "%s:%u: _read_stor_dev_info failed %d\n",
337 __func__, __LINE__, result);
338 return -ENODEV;
339 }
340
341 pr_debug("%s:%u: (%u:%u:%u): port %llu blk_size %llu num_blocks %llu "
342 "num_regions %u\n", __func__, __LINE__, repo->bus_index,
343 repo->dev_index, repo->dev_type, port, blk_size, num_blocks,
344 num_regions);
345
346 p = kzalloc(struct_size(p, regions, num_regions), GFP_KERNEL);
347 if (!p) {
348 result = -ENOMEM;
349 goto fail_malloc;
350 }
351
352 p->sbd.match_id = match_id;
353 p->sbd.dev_type = PS3_DEVICE_TYPE_SB;
354 p->sbd.bus_id = repo->bus_id;
355 p->sbd.dev_id = repo->dev_id;
356 p->sbd.d_region = &p->dma_region;
357 p->blk_size = blk_size;
358 p->num_regions = num_regions;
359
360 result = ps3_repository_find_interrupt(repo,
361 PS3_INTERRUPT_TYPE_EVENT_PORT,
362 &p->sbd.interrupt_id);
363 if (result) {
364 printk(KERN_ERR "%s:%u: find_interrupt failed %d\n", __func__,
365 __LINE__, result);
366 result = -ENODEV;
367 goto fail_find_interrupt;
368 }
369
370 for (i = 0; i < num_regions; i++) {
371 unsigned int id;
372 u64 start, size;
373
374 result = ps3_repository_read_stor_dev_region(repo->bus_index,
375 repo->dev_index,
376 i, &id, &start,
377 &size);
378 if (result) {
379 printk(KERN_ERR
380 "%s:%u: read_stor_dev_region failed %d\n",
381 __func__, __LINE__, result);
382 result = -ENODEV;
383 goto fail_read_region;
384 }
385 pr_debug("%s:%u: region %u: id %u start %llu size %llu\n",
386 __func__, __LINE__, i, id, start, size);
387
388 p->regions[i].id = id;
389 p->regions[i].start = start;
390 p->regions[i].size = size;
391 }
392
393 result = ps3_system_bus_device_register(&p->sbd);
394 if (result) {
395 pr_debug("%s:%u ps3_system_bus_device_register failed\n",
396 __func__, __LINE__);
397 goto fail_device_register;
398 }
399
400 pr_debug(" <- %s:%u\n", __func__, __LINE__);
401 return 0;
402
403 fail_device_register:
404 fail_read_region:
405 fail_find_interrupt:
406 kfree(p);
407 fail_malloc:
408 pr_debug(" <- %s:%u: fail.\n", __func__, __LINE__);
409 return result;
410 }
411
412 static int __init ps3_register_vuart_devices(void)
413 {
414 int result;
415 unsigned int port_number;
416
417 pr_debug(" -> %s:%d\n", __func__, __LINE__);
418
419 result = ps3_repository_read_vuart_av_port(&port_number);
420 if (result)
421 port_number = 0; /* av default */
422
423 result = ps3_setup_vuart_device(PS3_MATCH_ID_AV_SETTINGS, port_number);
424 WARN_ON(result);
425
426 result = ps3_repository_read_vuart_sysmgr_port(&port_number);
427 if (result)
428 port_number = 2; /* sysmgr default */
429
430 result = ps3_setup_vuart_device(PS3_MATCH_ID_SYSTEM_MANAGER,
431 port_number);
432 WARN_ON(result);
433
434 pr_debug(" <- %s:%d\n", __func__, __LINE__);
435 return result;
436 }
437
438 static int __init ps3_register_sound_devices(void)
439 {
440 int result;
441 struct layout {
442 struct ps3_system_bus_device dev;
443 struct ps3_dma_region d_region;
444 struct ps3_mmio_region m_region;
445 } *p;
446
447 pr_debug(" -> %s:%d\n", __func__, __LINE__);
448
449 p = kzalloc(sizeof(*p), GFP_KERNEL);
450 if (!p)
451 return -ENOMEM;
452
453 p->dev.match_id = PS3_MATCH_ID_SOUND;
454 p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
455 p->dev.d_region = &p->d_region;
456 p->dev.m_region = &p->m_region;
457
458 result = ps3_system_bus_device_register(&p->dev);
459
460 if (result) {
461 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
462 __func__, __LINE__);
463 goto fail_device_register;
464 }
465 pr_debug(" <- %s:%d\n", __func__, __LINE__);
466 return 0;
467
468 fail_device_register:
469 kfree(p);
470 pr_debug(" <- %s:%d failed\n", __func__, __LINE__);
471 return result;
472 }
473
474 static int __init ps3_register_graphics_devices(void)
475 {
476 int result;
477 struct layout {
478 struct ps3_system_bus_device dev;
479 } *p;
480
481 pr_debug(" -> %s:%d\n", __func__, __LINE__);
482
483 p = kzalloc(sizeof(struct layout), GFP_KERNEL);
484
485 if (!p)
486 return -ENOMEM;
487
488 p->dev.match_id = PS3_MATCH_ID_GPU;
489 p->dev.match_sub_id = PS3_MATCH_SUB_ID_GPU_FB;
490 p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
491
492 result = ps3_system_bus_device_register(&p->dev);
493
494 if (result) {
495 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
496 __func__, __LINE__);
497 goto fail_device_register;
498 }
499
500 pr_debug(" <- %s:%d\n", __func__, __LINE__);
501 return 0;
502
503 fail_device_register:
504 kfree(p);
505 pr_debug(" <- %s:%d failed\n", __func__, __LINE__);
506 return result;
507 }
508
509 static int __init ps3_register_ramdisk_device(void)
510 {
511 int result;
512 struct layout {
513 struct ps3_system_bus_device dev;
514 } *p;
515
516 pr_debug(" -> %s:%d\n", __func__, __LINE__);
517
518 p = kzalloc(sizeof(struct layout), GFP_KERNEL);
519
520 if (!p)
521 return -ENOMEM;
522
523 p->dev.match_id = PS3_MATCH_ID_GPU;
524 p->dev.match_sub_id = PS3_MATCH_SUB_ID_GPU_RAMDISK;
525 p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
526
527 result = ps3_system_bus_device_register(&p->dev);
528
529 if (result) {
530 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
531 __func__, __LINE__);
532 goto fail_device_register;
533 }
534
535 pr_debug(" <- %s:%d\n", __func__, __LINE__);
536 return 0;
537
538 fail_device_register:
539 kfree(p);
540 pr_debug(" <- %s:%d failed\n", __func__, __LINE__);
541 return result;
542 }
543
544 /**
545 * ps3_setup_dynamic_device - Setup a dynamic device from the repository
546 */
547
548 static int ps3_setup_dynamic_device(const struct ps3_repository_device *repo)
549 {
550 int result;
551
552 switch (repo->dev_type) {
553 case PS3_DEV_TYPE_STOR_DISK:
554 result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_DISK);
555
556 /* Some devices are not accessible from the Other OS lpar. */
557 if (result == -ENODEV) {
558 result = 0;
559 pr_debug("%s:%u: not accessible\n", __func__,
560 __LINE__);
561 }
562
563 if (result)
564 pr_debug("%s:%u ps3_setup_storage_dev failed\n",
565 __func__, __LINE__);
566 break;
567
568 case PS3_DEV_TYPE_STOR_ROM:
569 result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_ROM);
570 if (result)
571 pr_debug("%s:%u ps3_setup_storage_dev failed\n",
572 __func__, __LINE__);
573 break;
574
575 case PS3_DEV_TYPE_STOR_FLASH:
576 result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_FLASH);
577 if (result)
578 pr_debug("%s:%u ps3_setup_storage_dev failed\n",
579 __func__, __LINE__);
580 break;
581
582 default:
583 result = 0;
584 pr_debug("%s:%u: unsupported dev_type %u\n", __func__, __LINE__,
585 repo->dev_type);
586 }
587
588 return result;
589 }
590
591 /**
592 * ps3_setup_static_device - Setup a static device from the repository
593 */
594
595 static int __init ps3_setup_static_device(const struct ps3_repository_device *repo)
596 {
597 int result;
598
599 switch (repo->dev_type) {
600 case PS3_DEV_TYPE_SB_GELIC:
601 result = ps3_setup_gelic_device(repo);
602 if (result) {
603 pr_debug("%s:%d ps3_setup_gelic_device failed\n",
604 __func__, __LINE__);
605 }
606 break;
607 case PS3_DEV_TYPE_SB_USB:
608
609 /* Each USB device has both an EHCI and an OHCI HC */
610
611 result = ps3_setup_ehci_device(repo);
612
613 if (result) {
614 pr_debug("%s:%d ps3_setup_ehci_device failed\n",
615 __func__, __LINE__);
616 }
617
618 result = ps3_setup_ohci_device(repo);
619
620 if (result) {
621 pr_debug("%s:%d ps3_setup_ohci_device failed\n",
622 __func__, __LINE__);
623 }
624 break;
625
626 default:
627 return ps3_setup_dynamic_device(repo);
628 }
629
630 return result;
631 }
632
633 static void ps3_find_and_add_device(u64 bus_id, u64 dev_id)
634 {
635 struct ps3_repository_device repo;
636 int res;
637 unsigned int retries;
638 unsigned long rem;
639
640 /*
641 * On some firmware versions (e.g. 1.90), the device may not show up
642 * in the repository immediately
643 */
644 for (retries = 0; retries < 10; retries++) {
645 res = ps3_repository_find_device_by_id(&repo, bus_id, dev_id);
646 if (!res)
647 goto found;
648
649 rem = msleep_interruptible(100);
650 if (rem)
651 break;
652 }
653 pr_warn("%s:%u: device %llu:%llu not found\n",
654 __func__, __LINE__, bus_id, dev_id);
655 return;
656
657 found:
658 if (retries)
659 pr_debug("%s:%u: device %llu:%llu found after %u retries\n",
660 __func__, __LINE__, bus_id, dev_id, retries);
661
662 ps3_setup_dynamic_device(&repo);
663 return;
664 }
665
666 #define PS3_NOTIFICATION_DEV_ID ULONG_MAX
667 #define PS3_NOTIFICATION_INTERRUPT_ID 0
668
669 struct ps3_notification_device {
670 struct ps3_system_bus_device sbd;
671 spinlock_t lock;
672 u64 tag;
673 u64 lv1_status;
674 struct rcuwait wait;
675 bool done;
676 };
677
678 enum ps3_notify_type {
679 notify_device_ready = 0,
680 notify_region_probe = 1,
681 notify_region_update = 2,
682 };
683
684 struct ps3_notify_cmd {
685 u64 operation_code; /* must be zero */
686 u64 event_mask; /* OR of 1UL << enum ps3_notify_type */
687 };
688
689 struct ps3_notify_event {
690 u64 event_type; /* enum ps3_notify_type */
691 u64 bus_id;
692 u64 dev_id;
693 u64 dev_type;
694 u64 dev_port;
695 };
696
697 static irqreturn_t ps3_notification_interrupt(int irq, void *data)
698 {
699 struct ps3_notification_device *dev = data;
700 int res;
701 u64 tag, status;
702
703 spin_lock(&dev->lock);
704 res = lv1_storage_get_async_status(PS3_NOTIFICATION_DEV_ID, &tag,
705 &status);
706 if (tag != dev->tag)
707 pr_err("%s:%u: tag mismatch, got %llx, expected %llx\n",
708 __func__, __LINE__, tag, dev->tag);
709
710 if (res) {
711 pr_err("%s:%u: res %d status 0x%llx\n", __func__, __LINE__, res,
712 status);
713 } else {
714 pr_debug("%s:%u: completed, status 0x%llx\n", __func__,
715 __LINE__, status);
716 dev->lv1_status = status;
717 dev->done = true;
718 rcuwait_wake_up(&dev->wait);
719 }
720 spin_unlock(&dev->lock);
721 return IRQ_HANDLED;
722 }
723
724 static int ps3_notification_read_write(struct ps3_notification_device *dev,
725 u64 lpar, int write)
726 {
727 const char *op = write ? "write" : "read";
728 unsigned long flags;
729 int res;
730
731 spin_lock_irqsave(&dev->lock, flags);
732 res = write ? lv1_storage_write(dev->sbd.dev_id, 0, 0, 1, 0, lpar,
733 &dev->tag)
734 : lv1_storage_read(dev->sbd.dev_id, 0, 0, 1, 0, lpar,
735 &dev->tag);
736 dev->done = false;
737 spin_unlock_irqrestore(&dev->lock, flags);
738 if (res) {
739 pr_err("%s:%u: %s failed %d\n", __func__, __LINE__, op, res);
740 return -EPERM;
741 }
742 pr_debug("%s:%u: notification %s issued\n", __func__, __LINE__, op);
743
744 rcuwait_wait_event(&dev->wait, dev->done || kthread_should_stop(), TASK_IDLE);
745
746 if (kthread_should_stop())
747 res = -EINTR;
748
749 if (dev->lv1_status) {
750 pr_err("%s:%u: %s not completed, status 0x%llx\n", __func__,
751 __LINE__, op, dev->lv1_status);
752 return -EIO;
753 }
754 pr_debug("%s:%u: notification %s completed\n", __func__, __LINE__, op);
755
756 return 0;
757 }
758
759 static struct task_struct *probe_task;
760
761 /**
762 * ps3_probe_thread - Background repository probing at system startup.
763 *
764 * This implementation only supports background probing on a single bus.
765 * It uses the hypervisor's storage device notification mechanism to wait until
766 * a storage device is ready. The device notification mechanism uses a
767 * pseudo device to asynchronously notify the guest when storage devices become
768 * ready. The notification device has a block size of 512 bytes.
769 */
770
771 static int ps3_probe_thread(void *data)
772 {
773 struct {
774 struct ps3_notification_device dev;
775 u8 buf[512];
776 } *local;
777 struct ps3_notify_cmd *notify_cmd;
778 struct ps3_notify_event *notify_event;
779 int res;
780 unsigned int irq;
781 u64 lpar;
782
783 pr_debug(" -> %s:%u: kthread started\n", __func__, __LINE__);
784
785 local = kzalloc(sizeof(*local), GFP_KERNEL);
786 if (!local)
787 return -ENOMEM;
788
789 lpar = ps3_mm_phys_to_lpar(__pa(&local->buf));
790 notify_cmd = (struct ps3_notify_cmd *)&local->buf;
791 notify_event = (struct ps3_notify_event *)&local->buf;
792
793 /* dummy system bus device */
794 local->dev.sbd.bus_id = (u64)data;
795 local->dev.sbd.dev_id = PS3_NOTIFICATION_DEV_ID;
796 local->dev.sbd.interrupt_id = PS3_NOTIFICATION_INTERRUPT_ID;
797
798 res = lv1_open_device(local->dev.sbd.bus_id, local->dev.sbd.dev_id, 0);
799 if (res) {
800 pr_err("%s:%u: lv1_open_device failed %s\n", __func__,
801 __LINE__, ps3_result(res));
802 goto fail_free;
803 }
804
805 res = ps3_sb_event_receive_port_setup(&local->dev.sbd,
806 PS3_BINDING_CPU_ANY, &irq);
807 if (res) {
808 pr_err("%s:%u: ps3_sb_event_receive_port_setup failed %d\n",
809 __func__, __LINE__, res);
810 goto fail_close_device;
811 }
812
813 spin_lock_init(&local->dev.lock);
814 rcuwait_init(&local->dev.wait);
815
816 res = request_irq(irq, ps3_notification_interrupt, 0,
817 "ps3_notification", &local->dev);
818 if (res) {
819 pr_err("%s:%u: request_irq failed %d\n", __func__, __LINE__,
820 res);
821 goto fail_sb_event_receive_port_destroy;
822 }
823
824 /* Setup and write the request for device notification. */
825 notify_cmd->operation_code = 0; /* must be zero */
826 notify_cmd->event_mask = 1UL << notify_region_probe;
827
828 res = ps3_notification_read_write(&local->dev, lpar, 1);
829 if (res)
830 goto fail_free_irq;
831
832 set_freezable();
833 /* Loop here processing the requested notification events. */
834 do {
835 try_to_freeze();
836
837 memset(notify_event, 0, sizeof(*notify_event));
838
839 res = ps3_notification_read_write(&local->dev, lpar, 0);
840 if (res)
841 break;
842
843 pr_debug("%s:%u: notify event type 0x%llx bus id %llu dev id %llu"
844 " type %llu port %llu\n", __func__, __LINE__,
845 notify_event->event_type, notify_event->bus_id,
846 notify_event->dev_id, notify_event->dev_type,
847 notify_event->dev_port);
848
849 if (notify_event->event_type != notify_region_probe ||
850 notify_event->bus_id != local->dev.sbd.bus_id) {
851 pr_warn("%s:%u: bad notify_event: event %llu, dev_id %llu, dev_type %llu\n",
852 __func__, __LINE__, notify_event->event_type,
853 notify_event->dev_id, notify_event->dev_type);
854 continue;
855 }
856
857 ps3_find_and_add_device(local->dev.sbd.bus_id,
858 notify_event->dev_id);
859
860 } while (!kthread_should_stop());
861
862 fail_free_irq:
863 free_irq(irq, &local->dev);
864 fail_sb_event_receive_port_destroy:
865 ps3_sb_event_receive_port_destroy(&local->dev.sbd, irq);
866 fail_close_device:
867 lv1_close_device(local->dev.sbd.bus_id, local->dev.sbd.dev_id);
868 fail_free:
869 kfree(local);
870
871 probe_task = NULL;
872
873 pr_debug(" <- %s:%u: kthread finished\n", __func__, __LINE__);
874
875 return 0;
876 }
877
878 /**
879 * ps3_stop_probe_thread - Stops the background probe thread.
880 *
881 */
882
883 static int ps3_stop_probe_thread(struct notifier_block *nb, unsigned long code,
884 void *data)
885 {
886 if (probe_task)
887 kthread_stop(probe_task);
888 return 0;
889 }
890
891 static struct notifier_block nb = {
892 .notifier_call = ps3_stop_probe_thread
893 };
894
895 /**
896 * ps3_start_probe_thread - Starts the background probe thread.
897 *
898 */
899
900 static int __init ps3_start_probe_thread(enum ps3_bus_type bus_type)
901 {
902 int result;
903 struct task_struct *task;
904 struct ps3_repository_device repo;
905
906 pr_debug(" -> %s:%d\n", __func__, __LINE__);
907
908 memset(&repo, 0, sizeof(repo));
909
910 repo.bus_type = bus_type;
911
912 result = ps3_repository_find_bus(repo.bus_type, 0, &repo.bus_index);
913
914 if (result) {
915 printk(KERN_ERR "%s: Cannot find bus (%d)\n", __func__, result);
916 return -ENODEV;
917 }
918
919 result = ps3_repository_read_bus_id(repo.bus_index, &repo.bus_id);
920
921 if (result) {
922 printk(KERN_ERR "%s: read_bus_id failed %d\n", __func__,
923 result);
924 return -ENODEV;
925 }
926
927 task = kthread_run(ps3_probe_thread, (void *)repo.bus_id,
928 "ps3-probe-%u", bus_type);
929
930 if (IS_ERR(task)) {
931 result = PTR_ERR(task);
932 printk(KERN_ERR "%s: kthread_run failed %d\n", __func__,
933 result);
934 return result;
935 }
936
937 probe_task = task;
938 register_reboot_notifier(&nb);
939
940 pr_debug(" <- %s:%d\n", __func__, __LINE__);
941 return 0;
942 }
943
944 /**
945 * ps3_register_devices - Probe the system and register devices found.
946 *
947 * A device_initcall() routine.
948 */
949
950 static int __init ps3_register_devices(void)
951 {
952 int result;
953
954 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
955 return -ENODEV;
956
957 pr_debug(" -> %s:%d\n", __func__, __LINE__);
958
959 /* ps3_repository_dump_bus_info(); */
960
961 result = ps3_start_probe_thread(PS3_BUS_TYPE_STORAGE);
962
963 ps3_register_vuart_devices();
964
965 ps3_register_graphics_devices();
966
967 ps3_repository_find_devices(PS3_BUS_TYPE_SB, ps3_setup_static_device);
968
969 ps3_register_sound_devices();
970
971 ps3_register_lpm_devices();
972
973 ps3_register_ramdisk_device();
974
975 pr_debug(" <- %s:%d\n", __func__, __LINE__);
976 return 0;
977 }
978
979 device_initcall(ps3_register_devices);
980
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