Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
[linux-2.6.git] / arch / powerpc / platforms / ps3 / device-init.c
1 /*
2  *  PS3 device registration routines.
3  *
4  *  Copyright (C) 2007 Sony Computer Entertainment Inc.
5  *  Copyright 2007 Sony Corp.
6  *
7  *  This program is free software; you can redistribute it and/or modify
8  *  it under the terms of the GNU General Public License as published by
9  *  the Free Software Foundation; version 2 of the License.
10  *
11  *  This program is distributed in the hope that it will be useful,
12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  *  GNU General Public License for more details.
15  *
16  *  You should have received a copy of the GNU General Public License
17  *  along with this program; if not, write to the Free Software
18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
19  */
20
21 #include <linux/delay.h>
22 #include <linux/freezer.h>
23 #include <linux/kernel.h>
24 #include <linux/kthread.h>
25 #include <linux/init.h>
26 #include <linux/reboot.h>
27
28 #include <asm/firmware.h>
29 #include <asm/lv1call.h>
30 #include <asm/ps3stor.h>
31
32 #include "platform.h"
33
34 static int __init ps3_register_lpm_devices(void)
35 {
36         int result;
37         u64 tmp1;
38         u64 tmp2;
39         struct ps3_system_bus_device *dev;
40
41         pr_debug(" -> %s:%d\n", __func__, __LINE__);
42
43         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
44         if (!dev)
45                 return -ENOMEM;
46
47         dev->match_id = PS3_MATCH_ID_LPM;
48         dev->dev_type = PS3_DEVICE_TYPE_LPM;
49
50         /* The current lpm driver only supports a single BE processor. */
51
52         result = ps3_repository_read_be_node_id(0, &dev->lpm.node_id);
53
54         if (result) {
55                 pr_debug("%s:%d: ps3_repository_read_be_node_id failed \n",
56                         __func__, __LINE__);
57                 goto fail_read_repo;
58         }
59
60         result = ps3_repository_read_lpm_privileges(dev->lpm.node_id, &tmp1,
61                 &dev->lpm.rights);
62
63         if (result) {
64                 pr_debug("%s:%d: ps3_repository_read_lpm_privleges failed \n",
65                         __func__, __LINE__);
66                 goto fail_read_repo;
67         }
68
69         lv1_get_logical_partition_id(&tmp2);
70
71         if (tmp1 != tmp2) {
72                 pr_debug("%s:%d: wrong lpar\n",
73                         __func__, __LINE__);
74                 result = -ENODEV;
75                 goto fail_rights;
76         }
77
78         if (!(dev->lpm.rights & PS3_LPM_RIGHTS_USE_LPM)) {
79                 pr_debug("%s:%d: don't have rights to use lpm\n",
80                         __func__, __LINE__);
81                 result = -EPERM;
82                 goto fail_rights;
83         }
84
85         pr_debug("%s:%d: pu_id %llu, rights %llu(%llxh)\n",
86                 __func__, __LINE__, dev->lpm.pu_id, dev->lpm.rights,
87                 dev->lpm.rights);
88
89         result = ps3_repository_read_pu_id(0, &dev->lpm.pu_id);
90
91         if (result) {
92                 pr_debug("%s:%d: ps3_repository_read_pu_id failed \n",
93                         __func__, __LINE__);
94                 goto fail_read_repo;
95         }
96
97         result = ps3_system_bus_device_register(dev);
98
99         if (result) {
100                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
101                         __func__, __LINE__);
102                 goto fail_register;
103         }
104
105         pr_debug(" <- %s:%d\n", __func__, __LINE__);
106         return 0;
107
108
109 fail_register:
110 fail_rights:
111 fail_read_repo:
112         kfree(dev);
113         pr_debug(" <- %s:%d: failed\n", __func__, __LINE__);
114         return result;
115 }
116
117 /**
118  * ps3_setup_gelic_device - Setup and register a gelic device instance.
119  *
120  * Allocates memory for a struct ps3_system_bus_device instance, initialises the
121  * structure members, and registers the device instance with the system bus.
122  */
123
124 static int __init ps3_setup_gelic_device(
125         const struct ps3_repository_device *repo)
126 {
127         int result;
128         struct layout {
129                 struct ps3_system_bus_device dev;
130                 struct ps3_dma_region d_region;
131         } *p;
132
133         pr_debug(" -> %s:%d\n", __func__, __LINE__);
134
135         BUG_ON(repo->bus_type != PS3_BUS_TYPE_SB);
136         BUG_ON(repo->dev_type != PS3_DEV_TYPE_SB_GELIC);
137
138         p = kzalloc(sizeof(struct layout), GFP_KERNEL);
139
140         if (!p) {
141                 result = -ENOMEM;
142                 goto fail_malloc;
143         }
144
145         p->dev.match_id = PS3_MATCH_ID_GELIC;
146         p->dev.dev_type = PS3_DEVICE_TYPE_SB;
147         p->dev.bus_id = repo->bus_id;
148         p->dev.dev_id = repo->dev_id;
149         p->dev.d_region = &p->d_region;
150
151         result = ps3_repository_find_interrupt(repo,
152                 PS3_INTERRUPT_TYPE_EVENT_PORT, &p->dev.interrupt_id);
153
154         if (result) {
155                 pr_debug("%s:%d ps3_repository_find_interrupt failed\n",
156                         __func__, __LINE__);
157                 goto fail_find_interrupt;
158         }
159
160         BUG_ON(p->dev.interrupt_id != 0);
161
162         result = ps3_dma_region_init(&p->dev, p->dev.d_region, PS3_DMA_64K,
163                 PS3_DMA_OTHER, NULL, 0);
164
165         if (result) {
166                 pr_debug("%s:%d ps3_dma_region_init failed\n",
167                         __func__, __LINE__);
168                 goto fail_dma_init;
169         }
170
171         result = ps3_system_bus_device_register(&p->dev);
172
173         if (result) {
174                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
175                         __func__, __LINE__);
176                 goto fail_device_register;
177         }
178
179         pr_debug(" <- %s:%d\n", __func__, __LINE__);
180         return result;
181
182 fail_device_register:
183 fail_dma_init:
184 fail_find_interrupt:
185         kfree(p);
186 fail_malloc:
187         pr_debug(" <- %s:%d: fail.\n", __func__, __LINE__);
188         return result;
189 }
190
191 static int __init_refok ps3_setup_uhc_device(
192         const struct ps3_repository_device *repo, enum ps3_match_id match_id,
193         enum ps3_interrupt_type interrupt_type, enum ps3_reg_type reg_type)
194 {
195         int result;
196         struct layout {
197                 struct ps3_system_bus_device dev;
198                 struct ps3_dma_region d_region;
199                 struct ps3_mmio_region m_region;
200         } *p;
201         u64 bus_addr;
202         u64 len;
203
204         pr_debug(" -> %s:%d\n", __func__, __LINE__);
205
206         BUG_ON(repo->bus_type != PS3_BUS_TYPE_SB);
207         BUG_ON(repo->dev_type != PS3_DEV_TYPE_SB_USB);
208
209         p = kzalloc(sizeof(struct layout), GFP_KERNEL);
210
211         if (!p) {
212                 result = -ENOMEM;
213                 goto fail_malloc;
214         }
215
216         p->dev.match_id = match_id;
217         p->dev.dev_type = PS3_DEVICE_TYPE_SB;
218         p->dev.bus_id = repo->bus_id;
219         p->dev.dev_id = repo->dev_id;
220         p->dev.d_region = &p->d_region;
221         p->dev.m_region = &p->m_region;
222
223         result = ps3_repository_find_interrupt(repo,
224                 interrupt_type, &p->dev.interrupt_id);
225
226         if (result) {
227                 pr_debug("%s:%d ps3_repository_find_interrupt failed\n",
228                         __func__, __LINE__);
229                 goto fail_find_interrupt;
230         }
231
232         result = ps3_repository_find_reg(repo, reg_type,
233                 &bus_addr, &len);
234
235         if (result) {
236                 pr_debug("%s:%d ps3_repository_find_reg failed\n",
237                         __func__, __LINE__);
238                 goto fail_find_reg;
239         }
240
241         result = ps3_dma_region_init(&p->dev, p->dev.d_region, PS3_DMA_64K,
242                 PS3_DMA_INTERNAL, NULL, 0);
243
244         if (result) {
245                 pr_debug("%s:%d ps3_dma_region_init failed\n",
246                         __func__, __LINE__);
247                 goto fail_dma_init;
248         }
249
250         result = ps3_mmio_region_init(&p->dev, p->dev.m_region, bus_addr, len,
251                 PS3_MMIO_4K);
252
253         if (result) {
254                 pr_debug("%s:%d ps3_mmio_region_init failed\n",
255                         __func__, __LINE__);
256                 goto fail_mmio_init;
257         }
258
259         result = ps3_system_bus_device_register(&p->dev);
260
261         if (result) {
262                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
263                         __func__, __LINE__);
264                 goto fail_device_register;
265         }
266
267         pr_debug(" <- %s:%d\n", __func__, __LINE__);
268         return result;
269
270 fail_device_register:
271 fail_mmio_init:
272 fail_dma_init:
273 fail_find_reg:
274 fail_find_interrupt:
275         kfree(p);
276 fail_malloc:
277         pr_debug(" <- %s:%d: fail.\n", __func__, __LINE__);
278         return result;
279 }
280
281 static int __init ps3_setup_ehci_device(
282         const struct ps3_repository_device *repo)
283 {
284         return ps3_setup_uhc_device(repo, PS3_MATCH_ID_EHCI,
285                 PS3_INTERRUPT_TYPE_SB_EHCI, PS3_REG_TYPE_SB_EHCI);
286 }
287
288 static int __init ps3_setup_ohci_device(
289         const struct ps3_repository_device *repo)
290 {
291         return ps3_setup_uhc_device(repo, PS3_MATCH_ID_OHCI,
292                 PS3_INTERRUPT_TYPE_SB_OHCI, PS3_REG_TYPE_SB_OHCI);
293 }
294
295 static int __init ps3_setup_vuart_device(enum ps3_match_id match_id,
296         unsigned int port_number)
297 {
298         int result;
299         struct layout {
300                 struct ps3_system_bus_device dev;
301         } *p;
302
303         pr_debug(" -> %s:%d: match_id %u, port %u\n", __func__, __LINE__,
304                 match_id, port_number);
305
306         p = kzalloc(sizeof(struct layout), GFP_KERNEL);
307
308         if (!p)
309                 return -ENOMEM;
310
311         p->dev.match_id = match_id;
312         p->dev.dev_type = PS3_DEVICE_TYPE_VUART;
313         p->dev.port_number = port_number;
314
315         result = ps3_system_bus_device_register(&p->dev);
316
317         if (result) {
318                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
319                         __func__, __LINE__);
320                 goto fail_device_register;
321         }
322         pr_debug(" <- %s:%d\n", __func__, __LINE__);
323         return 0;
324
325 fail_device_register:
326         kfree(p);
327         pr_debug(" <- %s:%d fail\n", __func__, __LINE__);
328         return result;
329 }
330
331 static int ps3_setup_storage_dev(const struct ps3_repository_device *repo,
332                                  enum ps3_match_id match_id)
333 {
334         int result;
335         struct ps3_storage_device *p;
336         u64 port, blk_size, num_blocks;
337         unsigned int num_regions, i;
338
339         pr_debug(" -> %s:%u: match_id %u\n", __func__, __LINE__, match_id);
340
341         result = ps3_repository_read_stor_dev_info(repo->bus_index,
342                                                    repo->dev_index, &port,
343                                                    &blk_size, &num_blocks,
344                                                    &num_regions);
345         if (result) {
346                 printk(KERN_ERR "%s:%u: _read_stor_dev_info failed %d\n",
347                        __func__, __LINE__, result);
348                 return -ENODEV;
349         }
350
351         pr_debug("%s:%u: (%u:%u:%u): port %llu blk_size %llu num_blocks %llu "
352                  "num_regions %u\n", __func__, __LINE__, repo->bus_index,
353                  repo->dev_index, repo->dev_type, port, blk_size, num_blocks,
354                  num_regions);
355
356         p = kzalloc(sizeof(struct ps3_storage_device) +
357                     num_regions * sizeof(struct ps3_storage_region),
358                     GFP_KERNEL);
359         if (!p) {
360                 result = -ENOMEM;
361                 goto fail_malloc;
362         }
363
364         p->sbd.match_id = match_id;
365         p->sbd.dev_type = PS3_DEVICE_TYPE_SB;
366         p->sbd.bus_id = repo->bus_id;
367         p->sbd.dev_id = repo->dev_id;
368         p->sbd.d_region = &p->dma_region;
369         p->blk_size = blk_size;
370         p->num_regions = num_regions;
371
372         result = ps3_repository_find_interrupt(repo,
373                                                PS3_INTERRUPT_TYPE_EVENT_PORT,
374                                                &p->sbd.interrupt_id);
375         if (result) {
376                 printk(KERN_ERR "%s:%u: find_interrupt failed %d\n", __func__,
377                        __LINE__, result);
378                 result = -ENODEV;
379                 goto fail_find_interrupt;
380         }
381
382         for (i = 0; i < num_regions; i++) {
383                 unsigned int id;
384                 u64 start, size;
385
386                 result = ps3_repository_read_stor_dev_region(repo->bus_index,
387                                                              repo->dev_index,
388                                                              i, &id, &start,
389                                                              &size);
390                 if (result) {
391                         printk(KERN_ERR
392                                "%s:%u: read_stor_dev_region failed %d\n",
393                                __func__, __LINE__, result);
394                         result = -ENODEV;
395                         goto fail_read_region;
396                 }
397                 pr_debug("%s:%u: region %u: id %u start %llu size %llu\n",
398                          __func__, __LINE__, i, id, start, size);
399
400                 p->regions[i].id = id;
401                 p->regions[i].start = start;
402                 p->regions[i].size = size;
403         }
404
405         result = ps3_system_bus_device_register(&p->sbd);
406         if (result) {
407                 pr_debug("%s:%u ps3_system_bus_device_register failed\n",
408                          __func__, __LINE__);
409                 goto fail_device_register;
410         }
411
412         pr_debug(" <- %s:%u\n", __func__, __LINE__);
413         return 0;
414
415 fail_device_register:
416 fail_read_region:
417 fail_find_interrupt:
418         kfree(p);
419 fail_malloc:
420         pr_debug(" <- %s:%u: fail.\n", __func__, __LINE__);
421         return result;
422 }
423
424 static int __init ps3_register_vuart_devices(void)
425 {
426         int result;
427         unsigned int port_number;
428
429         pr_debug(" -> %s:%d\n", __func__, __LINE__);
430
431         result = ps3_repository_read_vuart_av_port(&port_number);
432         if (result)
433                 port_number = 0; /* av default */
434
435         result = ps3_setup_vuart_device(PS3_MATCH_ID_AV_SETTINGS, port_number);
436         WARN_ON(result);
437
438         result = ps3_repository_read_vuart_sysmgr_port(&port_number);
439         if (result)
440                 port_number = 2; /* sysmgr default */
441
442         result = ps3_setup_vuart_device(PS3_MATCH_ID_SYSTEM_MANAGER,
443                 port_number);
444         WARN_ON(result);
445
446         pr_debug(" <- %s:%d\n", __func__, __LINE__);
447         return result;
448 }
449
450 static int __init ps3_register_sound_devices(void)
451 {
452         int result;
453         struct layout {
454                 struct ps3_system_bus_device dev;
455                 struct ps3_dma_region d_region;
456                 struct ps3_mmio_region m_region;
457         } *p;
458
459         pr_debug(" -> %s:%d\n", __func__, __LINE__);
460
461         p = kzalloc(sizeof(*p), GFP_KERNEL);
462         if (!p)
463                 return -ENOMEM;
464
465         p->dev.match_id = PS3_MATCH_ID_SOUND;
466         p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
467         p->dev.d_region = &p->d_region;
468         p->dev.m_region = &p->m_region;
469
470         result = ps3_system_bus_device_register(&p->dev);
471
472         if (result) {
473                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
474                         __func__, __LINE__);
475                 goto fail_device_register;
476         }
477         pr_debug(" <- %s:%d\n", __func__, __LINE__);
478         return 0;
479
480 fail_device_register:
481         kfree(p);
482         pr_debug(" <- %s:%d failed\n", __func__, __LINE__);
483         return result;
484 }
485
486 static int __init ps3_register_graphics_devices(void)
487 {
488         int result;
489         struct layout {
490                 struct ps3_system_bus_device dev;
491         } *p;
492
493         pr_debug(" -> %s:%d\n", __func__, __LINE__);
494
495         p = kzalloc(sizeof(struct layout), GFP_KERNEL);
496
497         if (!p)
498                 return -ENOMEM;
499
500         p->dev.match_id = PS3_MATCH_ID_GPU;
501         p->dev.match_sub_id = PS3_MATCH_SUB_ID_GPU_FB;
502         p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
503
504         result = ps3_system_bus_device_register(&p->dev);
505
506         if (result) {
507                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
508                         __func__, __LINE__);
509                 goto fail_device_register;
510         }
511
512         pr_debug(" <- %s:%d\n", __func__, __LINE__);
513         return 0;
514
515 fail_device_register:
516         kfree(p);
517         pr_debug(" <- %s:%d failed\n", __func__, __LINE__);
518         return result;
519 }
520
521 static int __init ps3_register_ramdisk_device(void)
522 {
523         int result;
524         struct layout {
525                 struct ps3_system_bus_device dev;
526         } *p;
527
528         pr_debug(" -> %s:%d\n", __func__, __LINE__);
529
530         p = kzalloc(sizeof(struct layout), GFP_KERNEL);
531
532         if (!p)
533                 return -ENOMEM;
534
535         p->dev.match_id = PS3_MATCH_ID_GPU;
536         p->dev.match_sub_id = PS3_MATCH_SUB_ID_GPU_RAMDISK;
537         p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
538
539         result = ps3_system_bus_device_register(&p->dev);
540
541         if (result) {
542                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
543                         __func__, __LINE__);
544                 goto fail_device_register;
545         }
546
547         pr_debug(" <- %s:%d\n", __func__, __LINE__);
548         return 0;
549
550 fail_device_register:
551         kfree(p);
552         pr_debug(" <- %s:%d failed\n", __func__, __LINE__);
553         return result;
554 }
555
556 /**
557  * ps3_setup_dynamic_device - Setup a dynamic device from the repository
558  */
559
560 static int ps3_setup_dynamic_device(const struct ps3_repository_device *repo)
561 {
562         int result;
563
564         switch (repo->dev_type) {
565         case PS3_DEV_TYPE_STOR_DISK:
566                 result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_DISK);
567
568                 /* Some devices are not accessable from the Other OS lpar. */
569                 if (result == -ENODEV) {
570                         result = 0;
571                         pr_debug("%s:%u: not accessable\n", __func__,
572                                  __LINE__);
573                 }
574
575                 if (result)
576                         pr_debug("%s:%u ps3_setup_storage_dev failed\n",
577                                  __func__, __LINE__);
578                 break;
579
580         case PS3_DEV_TYPE_STOR_ROM:
581                 result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_ROM);
582                 if (result)
583                         pr_debug("%s:%u ps3_setup_storage_dev failed\n",
584                                  __func__, __LINE__);
585                 break;
586
587         case PS3_DEV_TYPE_STOR_FLASH:
588                 result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_FLASH);
589                 if (result)
590                         pr_debug("%s:%u ps3_setup_storage_dev failed\n",
591                                  __func__, __LINE__);
592                 break;
593
594         default:
595                 result = 0;
596                 pr_debug("%s:%u: unsupported dev_type %u\n", __func__, __LINE__,
597                         repo->dev_type);
598         }
599
600         return result;
601 }
602
603 /**
604  * ps3_setup_static_device - Setup a static device from the repository
605  */
606
607 static int __init ps3_setup_static_device(const struct ps3_repository_device *repo)
608 {
609         int result;
610
611         switch (repo->dev_type) {
612         case PS3_DEV_TYPE_SB_GELIC:
613                 result = ps3_setup_gelic_device(repo);
614                 if (result) {
615                         pr_debug("%s:%d ps3_setup_gelic_device failed\n",
616                                 __func__, __LINE__);
617                 }
618                 break;
619         case PS3_DEV_TYPE_SB_USB:
620
621                 /* Each USB device has both an EHCI and an OHCI HC */
622
623                 result = ps3_setup_ehci_device(repo);
624
625                 if (result) {
626                         pr_debug("%s:%d ps3_setup_ehci_device failed\n",
627                                 __func__, __LINE__);
628                 }
629
630                 result = ps3_setup_ohci_device(repo);
631
632                 if (result) {
633                         pr_debug("%s:%d ps3_setup_ohci_device failed\n",
634                                 __func__, __LINE__);
635                 }
636                 break;
637
638         default:
639                 return ps3_setup_dynamic_device(repo);
640         }
641
642         return result;
643 }
644
645 static void ps3_find_and_add_device(u64 bus_id, u64 dev_id)
646 {
647         struct ps3_repository_device repo;
648         int res;
649         unsigned int retries;
650         unsigned long rem;
651
652         /*
653          * On some firmware versions (e.g. 1.90), the device may not show up
654          * in the repository immediately
655          */
656         for (retries = 0; retries < 10; retries++) {
657                 res = ps3_repository_find_device_by_id(&repo, bus_id, dev_id);
658                 if (!res)
659                         goto found;
660
661                 rem = msleep_interruptible(100);
662                 if (rem)
663                         break;
664         }
665         pr_warning("%s:%u: device %llu:%llu not found\n", __func__, __LINE__,
666                    bus_id, dev_id);
667         return;
668
669 found:
670         if (retries)
671                 pr_debug("%s:%u: device %llu:%llu found after %u retries\n",
672                          __func__, __LINE__, bus_id, dev_id, retries);
673
674         ps3_setup_dynamic_device(&repo);
675         return;
676 }
677
678 #define PS3_NOTIFICATION_DEV_ID         ULONG_MAX
679 #define PS3_NOTIFICATION_INTERRUPT_ID   0
680
681 struct ps3_notification_device {
682         struct ps3_system_bus_device sbd;
683         spinlock_t lock;
684         u64 tag;
685         u64 lv1_status;
686         struct completion done;
687 };
688
689 enum ps3_notify_type {
690         notify_device_ready = 0,
691         notify_region_probe = 1,
692         notify_region_update = 2,
693 };
694
695 struct ps3_notify_cmd {
696         u64 operation_code;             /* must be zero */
697         u64 event_mask;                 /* OR of 1UL << enum ps3_notify_type */
698 };
699
700 struct ps3_notify_event {
701         u64 event_type;                 /* enum ps3_notify_type */
702         u64 bus_id;
703         u64 dev_id;
704         u64 dev_type;
705         u64 dev_port;
706 };
707
708 static irqreturn_t ps3_notification_interrupt(int irq, void *data)
709 {
710         struct ps3_notification_device *dev = data;
711         int res;
712         u64 tag, status;
713
714         spin_lock(&dev->lock);
715         res = lv1_storage_get_async_status(PS3_NOTIFICATION_DEV_ID, &tag,
716                                            &status);
717         if (tag != dev->tag)
718                 pr_err("%s:%u: tag mismatch, got %llx, expected %llx\n",
719                        __func__, __LINE__, tag, dev->tag);
720
721         if (res) {
722                 pr_err("%s:%u: res %d status 0x%llx\n", __func__, __LINE__, res,
723                        status);
724         } else {
725                 pr_debug("%s:%u: completed, status 0x%llx\n", __func__,
726                          __LINE__, status);
727                 dev->lv1_status = status;
728                 complete(&dev->done);
729         }
730         spin_unlock(&dev->lock);
731         return IRQ_HANDLED;
732 }
733
734 static int ps3_notification_read_write(struct ps3_notification_device *dev,
735                                        u64 lpar, int write)
736 {
737         const char *op = write ? "write" : "read";
738         unsigned long flags;
739         int res;
740
741         init_completion(&dev->done);
742         spin_lock_irqsave(&dev->lock, flags);
743         res = write ? lv1_storage_write(dev->sbd.dev_id, 0, 0, 1, 0, lpar,
744                                         &dev->tag)
745                     : lv1_storage_read(dev->sbd.dev_id, 0, 0, 1, 0, lpar,
746                                        &dev->tag);
747         spin_unlock_irqrestore(&dev->lock, flags);
748         if (res) {
749                 pr_err("%s:%u: %s failed %d\n", __func__, __LINE__, op, res);
750                 return -EPERM;
751         }
752         pr_debug("%s:%u: notification %s issued\n", __func__, __LINE__, op);
753
754         res = wait_event_interruptible(dev->done.wait,
755                                        dev->done.done || kthread_should_stop());
756         if (kthread_should_stop())
757                 res = -EINTR;
758         if (res) {
759                 pr_debug("%s:%u: interrupted %s\n", __func__, __LINE__, op);
760                 return res;
761         }
762
763         if (dev->lv1_status) {
764                 pr_err("%s:%u: %s not completed, status 0x%llx\n", __func__,
765                        __LINE__, op, dev->lv1_status);
766                 return -EIO;
767         }
768         pr_debug("%s:%u: notification %s completed\n", __func__, __LINE__, op);
769
770         return 0;
771 }
772
773 static struct task_struct *probe_task;
774
775 /**
776  * ps3_probe_thread - Background repository probing at system startup.
777  *
778  * This implementation only supports background probing on a single bus.
779  * It uses the hypervisor's storage device notification mechanism to wait until
780  * a storage device is ready.  The device notification mechanism uses a
781  * pseudo device to asynchronously notify the guest when storage devices become
782  * ready.  The notification device has a block size of 512 bytes.
783  */
784
785 static int ps3_probe_thread(void *data)
786 {
787         struct ps3_notification_device dev;
788         int res;
789         unsigned int irq;
790         u64 lpar;
791         void *buf;
792         struct ps3_notify_cmd *notify_cmd;
793         struct ps3_notify_event *notify_event;
794
795         pr_debug(" -> %s:%u: kthread started\n", __func__, __LINE__);
796
797         buf = kzalloc(512, GFP_KERNEL);
798         if (!buf)
799                 return -ENOMEM;
800
801         lpar = ps3_mm_phys_to_lpar(__pa(buf));
802         notify_cmd = buf;
803         notify_event = buf;
804
805         /* dummy system bus device */
806         dev.sbd.bus_id = (u64)data;
807         dev.sbd.dev_id = PS3_NOTIFICATION_DEV_ID;
808         dev.sbd.interrupt_id = PS3_NOTIFICATION_INTERRUPT_ID;
809
810         res = lv1_open_device(dev.sbd.bus_id, dev.sbd.dev_id, 0);
811         if (res) {
812                 pr_err("%s:%u: lv1_open_device failed %s\n", __func__,
813                        __LINE__, ps3_result(res));
814                 goto fail_free;
815         }
816
817         res = ps3_sb_event_receive_port_setup(&dev.sbd, PS3_BINDING_CPU_ANY,
818                                               &irq);
819         if (res) {
820                 pr_err("%s:%u: ps3_sb_event_receive_port_setup failed %d\n",
821                        __func__, __LINE__, res);
822                goto fail_close_device;
823         }
824
825         spin_lock_init(&dev.lock);
826
827         res = request_irq(irq, ps3_notification_interrupt, IRQF_DISABLED,
828                           "ps3_notification", &dev);
829         if (res) {
830                 pr_err("%s:%u: request_irq failed %d\n", __func__, __LINE__,
831                        res);
832                 goto fail_sb_event_receive_port_destroy;
833         }
834
835         /* Setup and write the request for device notification. */
836         notify_cmd->operation_code = 0; /* must be zero */
837         notify_cmd->event_mask = 1UL << notify_region_probe;
838
839         res = ps3_notification_read_write(&dev, lpar, 1);
840         if (res)
841                 goto fail_free_irq;
842
843         /* Loop here processing the requested notification events. */
844         do {
845                 try_to_freeze();
846
847                 memset(notify_event, 0, sizeof(*notify_event));
848
849                 res = ps3_notification_read_write(&dev, lpar, 0);
850                 if (res)
851                         break;
852
853                 pr_debug("%s:%u: notify event type 0x%llx bus id %llu dev id %llu"
854                          " type %llu port %llu\n", __func__, __LINE__,
855                          notify_event->event_type, notify_event->bus_id,
856                          notify_event->dev_id, notify_event->dev_type,
857                          notify_event->dev_port);
858
859                 if (notify_event->event_type != notify_region_probe ||
860                     notify_event->bus_id != dev.sbd.bus_id) {
861                         pr_warning("%s:%u: bad notify_event: event %llu, "
862                                    "dev_id %llu, dev_type %llu\n",
863                                    __func__, __LINE__, notify_event->event_type,
864                                    notify_event->dev_id,
865                                    notify_event->dev_type);
866                         continue;
867                 }
868
869                 ps3_find_and_add_device(dev.sbd.bus_id, notify_event->dev_id);
870
871         } while (!kthread_should_stop());
872
873 fail_free_irq:
874         free_irq(irq, &dev);
875 fail_sb_event_receive_port_destroy:
876         ps3_sb_event_receive_port_destroy(&dev.sbd, irq);
877 fail_close_device:
878         lv1_close_device(dev.sbd.bus_id, dev.sbd.dev_id);
879 fail_free:
880         kfree(buf);
881
882         probe_task = NULL;
883
884         pr_debug(" <- %s:%u: kthread finished\n", __func__, __LINE__);
885
886         return 0;
887 }
888
889 /**
890  * ps3_stop_probe_thread - Stops the background probe thread.
891  *
892  */
893
894 static int ps3_stop_probe_thread(struct notifier_block *nb, unsigned long code,
895                                  void *data)
896 {
897         if (probe_task)
898                 kthread_stop(probe_task);
899         return 0;
900 }
901
902 static struct notifier_block nb = {
903         .notifier_call = ps3_stop_probe_thread
904 };
905
906 /**
907  * ps3_start_probe_thread - Starts the background probe thread.
908  *
909  */
910
911 static int __init ps3_start_probe_thread(enum ps3_bus_type bus_type)
912 {
913         int result;
914         struct task_struct *task;
915         struct ps3_repository_device repo;
916
917         pr_debug(" -> %s:%d\n", __func__, __LINE__);
918
919         memset(&repo, 0, sizeof(repo));
920
921         repo.bus_type = bus_type;
922
923         result = ps3_repository_find_bus(repo.bus_type, 0, &repo.bus_index);
924
925         if (result) {
926                 printk(KERN_ERR "%s: Cannot find bus (%d)\n", __func__, result);
927                 return -ENODEV;
928         }
929
930         result = ps3_repository_read_bus_id(repo.bus_index, &repo.bus_id);
931
932         if (result) {
933                 printk(KERN_ERR "%s: read_bus_id failed %d\n", __func__,
934                         result);
935                 return -ENODEV;
936         }
937
938         task = kthread_run(ps3_probe_thread, (void *)repo.bus_id,
939                            "ps3-probe-%u", bus_type);
940
941         if (IS_ERR(task)) {
942                 result = PTR_ERR(task);
943                 printk(KERN_ERR "%s: kthread_run failed %d\n", __func__,
944                        result);
945                 return result;
946         }
947
948         probe_task = task;
949         register_reboot_notifier(&nb);
950
951         pr_debug(" <- %s:%d\n", __func__, __LINE__);
952         return 0;
953 }
954
955 /**
956  * ps3_register_devices - Probe the system and register devices found.
957  *
958  * A device_initcall() routine.
959  */
960
961 static int __init ps3_register_devices(void)
962 {
963         int result;
964
965         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
966                 return -ENODEV;
967
968         pr_debug(" -> %s:%d\n", __func__, __LINE__);
969
970         /* ps3_repository_dump_bus_info(); */
971
972         result = ps3_start_probe_thread(PS3_BUS_TYPE_STORAGE);
973
974         ps3_register_vuart_devices();
975
976         ps3_register_graphics_devices();
977
978         ps3_repository_find_devices(PS3_BUS_TYPE_SB, ps3_setup_static_device);
979
980         ps3_register_sound_devices();
981
982         ps3_register_lpm_devices();
983
984         ps3_register_ramdisk_device();
985
986         pr_debug(" <- %s:%d\n", __func__, __LINE__);
987         return 0;
988 }
989
990 device_initcall(ps3_register_devices);