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TOMOYO Linux Cross Reference
Linux/arch/powerpc/platforms/ps3/device-init.c

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  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/slab.h>
 27 #include <linux/reboot.h>
 28 
 29 #include <asm/firmware.h>
 30 #include <asm/lv1call.h>
 31 #include <asm/ps3stor.h>
 32 
 33 #include "platform.h"
 34 
 35 static int __init ps3_register_lpm_devices(void)
 36 {
 37         int result;
 38         u64 tmp1;
 39         u64 tmp2;
 40         struct ps3_system_bus_device *dev;
 41 
 42         pr_debug(" -> %s:%d\n", __func__, __LINE__);
 43 
 44         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 45         if (!dev)
 46                 return -ENOMEM;
 47 
 48         dev->match_id = PS3_MATCH_ID_LPM;
 49         dev->dev_type = PS3_DEVICE_TYPE_LPM;
 50 
 51         /* The current lpm driver only supports a single BE processor. */
 52 
 53         result = ps3_repository_read_be_node_id(0, &dev->lpm.node_id);
 54 
 55         if (result) {
 56                 pr_debug("%s:%d: ps3_repository_read_be_node_id failed \n",
 57                         __func__, __LINE__);
 58                 goto fail_read_repo;
 59         }
 60 
 61         result = ps3_repository_read_lpm_privileges(dev->lpm.node_id, &tmp1,
 62                 &dev->lpm.rights);
 63 
 64         if (result) {
 65                 pr_debug("%s:%d: ps3_repository_read_lpm_privleges failed \n",
 66                         __func__, __LINE__);
 67                 goto fail_read_repo;
 68         }
 69 
 70         lv1_get_logical_partition_id(&tmp2);
 71 
 72         if (tmp1 != tmp2) {
 73                 pr_debug("%s:%d: wrong lpar\n",
 74                         __func__, __LINE__);
 75                 result = -ENODEV;
 76                 goto fail_rights;
 77         }
 78 
 79         if (!(dev->lpm.rights & PS3_LPM_RIGHTS_USE_LPM)) {
 80                 pr_debug("%s:%d: don't have rights to use lpm\n",
 81                         __func__, __LINE__);
 82                 result = -EPERM;
 83                 goto fail_rights;
 84         }
 85 
 86         pr_debug("%s:%d: pu_id %llu, rights %llu(%llxh)\n",
 87                 __func__, __LINE__, dev->lpm.pu_id, dev->lpm.rights,
 88                 dev->lpm.rights);
 89 
 90         result = ps3_repository_read_pu_id(0, &dev->lpm.pu_id);
 91 
 92         if (result) {
 93                 pr_debug("%s:%d: ps3_repository_read_pu_id failed \n",
 94                         __func__, __LINE__);
 95                 goto fail_read_repo;
 96         }
 97 
 98         result = ps3_system_bus_device_register(dev);
 99 
100         if (result) {
101                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
102                         __func__, __LINE__);
103                 goto fail_register;
104         }
105 
106         pr_debug(" <- %s:%d\n", __func__, __LINE__);
107         return 0;
108 
109 
110 fail_register:
111 fail_rights:
112 fail_read_repo:
113         kfree(dev);
114         pr_debug(" <- %s:%d: failed\n", __func__, __LINE__);
115         return result;
116 }
117 
118 /**
119  * ps3_setup_gelic_device - Setup and register a gelic device instance.
120  *
121  * Allocates memory for a struct ps3_system_bus_device instance, initialises the
122  * structure members, and registers the device instance with the system bus.
123  */
124 
125 static int __init ps3_setup_gelic_device(
126         const struct ps3_repository_device *repo)
127 {
128         int result;
129         struct layout {
130                 struct ps3_system_bus_device dev;
131                 struct ps3_dma_region d_region;
132         } *p;
133 
134         pr_debug(" -> %s:%d\n", __func__, __LINE__);
135 
136         BUG_ON(repo->bus_type != PS3_BUS_TYPE_SB);
137         BUG_ON(repo->dev_type != PS3_DEV_TYPE_SB_GELIC);
138 
139         p = kzalloc(sizeof(struct layout), GFP_KERNEL);
140 
141         if (!p) {
142                 result = -ENOMEM;
143                 goto fail_malloc;
144         }
145 
146         p->dev.match_id = PS3_MATCH_ID_GELIC;
147         p->dev.dev_type = PS3_DEVICE_TYPE_SB;
148         p->dev.bus_id = repo->bus_id;
149         p->dev.dev_id = repo->dev_id;
150         p->dev.d_region = &p->d_region;
151 
152         result = ps3_repository_find_interrupt(repo,
153                 PS3_INTERRUPT_TYPE_EVENT_PORT, &p->dev.interrupt_id);
154 
155         if (result) {
156                 pr_debug("%s:%d ps3_repository_find_interrupt failed\n",
157                         __func__, __LINE__);
158                 goto fail_find_interrupt;
159         }
160 
161         BUG_ON(p->dev.interrupt_id != 0);
162 
163         result = ps3_dma_region_init(&p->dev, p->dev.d_region, PS3_DMA_64K,
164                 PS3_DMA_OTHER, NULL, 0);
165 
166         if (result) {
167                 pr_debug("%s:%d ps3_dma_region_init failed\n",
168                         __func__, __LINE__);
169                 goto fail_dma_init;
170         }
171 
172         result = ps3_system_bus_device_register(&p->dev);
173 
174         if (result) {
175                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
176                         __func__, __LINE__);
177                 goto fail_device_register;
178         }
179 
180         pr_debug(" <- %s:%d\n", __func__, __LINE__);
181         return result;
182 
183 fail_device_register:
184 fail_dma_init:
185 fail_find_interrupt:
186         kfree(p);
187 fail_malloc:
188         pr_debug(" <- %s:%d: fail.\n", __func__, __LINE__);
189         return result;
190 }
191 
192 static int __init_refok ps3_setup_uhc_device(
193         const struct ps3_repository_device *repo, enum ps3_match_id match_id,
194         enum ps3_interrupt_type interrupt_type, enum ps3_reg_type reg_type)
195 {
196         int result;
197         struct layout {
198                 struct ps3_system_bus_device dev;
199                 struct ps3_dma_region d_region;
200                 struct ps3_mmio_region m_region;
201         } *p;
202         u64 bus_addr;
203         u64 len;
204 
205         pr_debug(" -> %s:%d\n", __func__, __LINE__);
206 
207         BUG_ON(repo->bus_type != PS3_BUS_TYPE_SB);
208         BUG_ON(repo->dev_type != PS3_DEV_TYPE_SB_USB);
209 
210         p = kzalloc(sizeof(struct layout), GFP_KERNEL);
211 
212         if (!p) {
213                 result = -ENOMEM;
214                 goto fail_malloc;
215         }
216 
217         p->dev.match_id = match_id;
218         p->dev.dev_type = PS3_DEVICE_TYPE_SB;
219         p->dev.bus_id = repo->bus_id;
220         p->dev.dev_id = repo->dev_id;
221         p->dev.d_region = &p->d_region;
222         p->dev.m_region = &p->m_region;
223 
224         result = ps3_repository_find_interrupt(repo,
225                 interrupt_type, &p->dev.interrupt_id);
226 
227         if (result) {
228                 pr_debug("%s:%d ps3_repository_find_interrupt failed\n",
229                         __func__, __LINE__);
230                 goto fail_find_interrupt;
231         }
232 
233         result = ps3_repository_find_reg(repo, reg_type,
234                 &bus_addr, &len);
235 
236         if (result) {
237                 pr_debug("%s:%d ps3_repository_find_reg failed\n",
238                         __func__, __LINE__);
239                 goto fail_find_reg;
240         }
241 
242         result = ps3_dma_region_init(&p->dev, p->dev.d_region, PS3_DMA_64K,
243                 PS3_DMA_INTERNAL, NULL, 0);
244 
245         if (result) {
246                 pr_debug("%s:%d ps3_dma_region_init failed\n",
247                         __func__, __LINE__);
248                 goto fail_dma_init;
249         }
250 
251         result = ps3_mmio_region_init(&p->dev, p->dev.m_region, bus_addr, len,
252                 PS3_MMIO_4K);
253 
254         if (result) {
255                 pr_debug("%s:%d ps3_mmio_region_init failed\n",
256                         __func__, __LINE__);
257                 goto fail_mmio_init;
258         }
259 
260         result = ps3_system_bus_device_register(&p->dev);
261 
262         if (result) {
263                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
264                         __func__, __LINE__);
265                 goto fail_device_register;
266         }
267 
268         pr_debug(" <- %s:%d\n", __func__, __LINE__);
269         return result;
270 
271 fail_device_register:
272 fail_mmio_init:
273 fail_dma_init:
274 fail_find_reg:
275 fail_find_interrupt:
276         kfree(p);
277 fail_malloc:
278         pr_debug(" <- %s:%d: fail.\n", __func__, __LINE__);
279         return result;
280 }
281 
282 static int __init ps3_setup_ehci_device(
283         const struct ps3_repository_device *repo)
284 {
285         return ps3_setup_uhc_device(repo, PS3_MATCH_ID_EHCI,
286                 PS3_INTERRUPT_TYPE_SB_EHCI, PS3_REG_TYPE_SB_EHCI);
287 }
288 
289 static int __init ps3_setup_ohci_device(
290         const struct ps3_repository_device *repo)
291 {
292         return ps3_setup_uhc_device(repo, PS3_MATCH_ID_OHCI,
293                 PS3_INTERRUPT_TYPE_SB_OHCI, PS3_REG_TYPE_SB_OHCI);
294 }
295 
296 static int __init ps3_setup_vuart_device(enum ps3_match_id match_id,
297         unsigned int port_number)
298 {
299         int result;
300         struct layout {
301                 struct ps3_system_bus_device dev;
302         } *p;
303 
304         pr_debug(" -> %s:%d: match_id %u, port %u\n", __func__, __LINE__,
305                 match_id, port_number);
306 
307         p = kzalloc(sizeof(struct layout), GFP_KERNEL);
308 
309         if (!p)
310                 return -ENOMEM;
311 
312         p->dev.match_id = match_id;
313         p->dev.dev_type = PS3_DEVICE_TYPE_VUART;
314         p->dev.port_number = port_number;
315 
316         result = ps3_system_bus_device_register(&p->dev);
317 
318         if (result) {
319                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
320                         __func__, __LINE__);
321                 goto fail_device_register;
322         }
323         pr_debug(" <- %s:%d\n", __func__, __LINE__);
324         return 0;
325 
326 fail_device_register:
327         kfree(p);
328         pr_debug(" <- %s:%d fail\n", __func__, __LINE__);
329         return result;
330 }
331 
332 static int ps3_setup_storage_dev(const struct ps3_repository_device *repo,
333                                  enum ps3_match_id match_id)
334 {
335         int result;
336         struct ps3_storage_device *p;
337         u64 port, blk_size, num_blocks;
338         unsigned int num_regions, i;
339 
340         pr_debug(" -> %s:%u: match_id %u\n", __func__, __LINE__, match_id);
341 
342         result = ps3_repository_read_stor_dev_info(repo->bus_index,
343                                                    repo->dev_index, &port,
344                                                    &blk_size, &num_blocks,
345                                                    &num_regions);
346         if (result) {
347                 printk(KERN_ERR "%s:%u: _read_stor_dev_info failed %d\n",
348                        __func__, __LINE__, result);
349                 return -ENODEV;
350         }
351 
352         pr_debug("%s:%u: (%u:%u:%u): port %llu blk_size %llu num_blocks %llu "
353                  "num_regions %u\n", __func__, __LINE__, repo->bus_index,
354                  repo->dev_index, repo->dev_type, port, blk_size, num_blocks,
355                  num_regions);
356 
357         p = kzalloc(sizeof(struct ps3_storage_device) +
358                     num_regions * sizeof(struct ps3_storage_region),
359                     GFP_KERNEL);
360         if (!p) {
361                 result = -ENOMEM;
362                 goto fail_malloc;
363         }
364 
365         p->sbd.match_id = match_id;
366         p->sbd.dev_type = PS3_DEVICE_TYPE_SB;
367         p->sbd.bus_id = repo->bus_id;
368         p->sbd.dev_id = repo->dev_id;
369         p->sbd.d_region = &p->dma_region;
370         p->blk_size = blk_size;
371         p->num_regions = num_regions;
372 
373         result = ps3_repository_find_interrupt(repo,
374                                                PS3_INTERRUPT_TYPE_EVENT_PORT,
375                                                &p->sbd.interrupt_id);
376         if (result) {
377                 printk(KERN_ERR "%s:%u: find_interrupt failed %d\n", __func__,
378                        __LINE__, result);
379                 result = -ENODEV;
380                 goto fail_find_interrupt;
381         }
382 
383         for (i = 0; i < num_regions; i++) {
384                 unsigned int id;
385                 u64 start, size;
386 
387                 result = ps3_repository_read_stor_dev_region(repo->bus_index,
388                                                              repo->dev_index,
389                                                              i, &id, &start,
390                                                              &size);
391                 if (result) {
392                         printk(KERN_ERR
393                                "%s:%u: read_stor_dev_region failed %d\n",
394                                __func__, __LINE__, result);
395                         result = -ENODEV;
396                         goto fail_read_region;
397                 }
398                 pr_debug("%s:%u: region %u: id %u start %llu size %llu\n",
399                          __func__, __LINE__, i, id, start, size);
400 
401                 p->regions[i].id = id;
402                 p->regions[i].start = start;
403                 p->regions[i].size = size;
404         }
405 
406         result = ps3_system_bus_device_register(&p->sbd);
407         if (result) {
408                 pr_debug("%s:%u ps3_system_bus_device_register failed\n",
409                          __func__, __LINE__);
410                 goto fail_device_register;
411         }
412 
413         pr_debug(" <- %s:%u\n", __func__, __LINE__);
414         return 0;
415 
416 fail_device_register:
417 fail_read_region:
418 fail_find_interrupt:
419         kfree(p);
420 fail_malloc:
421         pr_debug(" <- %s:%u: fail.\n", __func__, __LINE__);
422         return result;
423 }
424 
425 static int __init ps3_register_vuart_devices(void)
426 {
427         int result;
428         unsigned int port_number;
429 
430         pr_debug(" -> %s:%d\n", __func__, __LINE__);
431 
432         result = ps3_repository_read_vuart_av_port(&port_number);
433         if (result)
434                 port_number = 0; /* av default */
435 
436         result = ps3_setup_vuart_device(PS3_MATCH_ID_AV_SETTINGS, port_number);
437         WARN_ON(result);
438 
439         result = ps3_repository_read_vuart_sysmgr_port(&port_number);
440         if (result)
441                 port_number = 2; /* sysmgr default */
442 
443         result = ps3_setup_vuart_device(PS3_MATCH_ID_SYSTEM_MANAGER,
444                 port_number);
445         WARN_ON(result);
446 
447         pr_debug(" <- %s:%d\n", __func__, __LINE__);
448         return result;
449 }
450 
451 static int __init ps3_register_sound_devices(void)
452 {
453         int result;
454         struct layout {
455                 struct ps3_system_bus_device dev;
456                 struct ps3_dma_region d_region;
457                 struct ps3_mmio_region m_region;
458         } *p;
459 
460         pr_debug(" -> %s:%d\n", __func__, __LINE__);
461 
462         p = kzalloc(sizeof(*p), GFP_KERNEL);
463         if (!p)
464                 return -ENOMEM;
465 
466         p->dev.match_id = PS3_MATCH_ID_SOUND;
467         p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
468         p->dev.d_region = &p->d_region;
469         p->dev.m_region = &p->m_region;
470 
471         result = ps3_system_bus_device_register(&p->dev);
472 
473         if (result) {
474                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
475                         __func__, __LINE__);
476                 goto fail_device_register;
477         }
478         pr_debug(" <- %s:%d\n", __func__, __LINE__);
479         return 0;
480 
481 fail_device_register:
482         kfree(p);
483         pr_debug(" <- %s:%d failed\n", __func__, __LINE__);
484         return result;
485 }
486 
487 static int __init ps3_register_graphics_devices(void)
488 {
489         int result;
490         struct layout {
491                 struct ps3_system_bus_device dev;
492         } *p;
493 
494         pr_debug(" -> %s:%d\n", __func__, __LINE__);
495 
496         p = kzalloc(sizeof(struct layout), GFP_KERNEL);
497 
498         if (!p)
499                 return -ENOMEM;
500 
501         p->dev.match_id = PS3_MATCH_ID_GPU;
502         p->dev.match_sub_id = PS3_MATCH_SUB_ID_GPU_FB;
503         p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
504 
505         result = ps3_system_bus_device_register(&p->dev);
506 
507         if (result) {
508                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
509                         __func__, __LINE__);
510                 goto fail_device_register;
511         }
512 
513         pr_debug(" <- %s:%d\n", __func__, __LINE__);
514         return 0;
515 
516 fail_device_register:
517         kfree(p);
518         pr_debug(" <- %s:%d failed\n", __func__, __LINE__);
519         return result;
520 }
521 
522 static int __init ps3_register_ramdisk_device(void)
523 {
524         int result;
525         struct layout {
526                 struct ps3_system_bus_device dev;
527         } *p;
528 
529         pr_debug(" -> %s:%d\n", __func__, __LINE__);
530 
531         p = kzalloc(sizeof(struct layout), GFP_KERNEL);
532 
533         if (!p)
534                 return -ENOMEM;
535 
536         p->dev.match_id = PS3_MATCH_ID_GPU;
537         p->dev.match_sub_id = PS3_MATCH_SUB_ID_GPU_RAMDISK;
538         p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
539 
540         result = ps3_system_bus_device_register(&p->dev);
541 
542         if (result) {
543                 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
544                         __func__, __LINE__);
545                 goto fail_device_register;
546         }
547 
548         pr_debug(" <- %s:%d\n", __func__, __LINE__);
549         return 0;
550 
551 fail_device_register:
552         kfree(p);
553         pr_debug(" <- %s:%d failed\n", __func__, __LINE__);
554         return result;
555 }
556 
557 /**
558  * ps3_setup_dynamic_device - Setup a dynamic device from the repository
559  */
560 
561 static int ps3_setup_dynamic_device(const struct ps3_repository_device *repo)
562 {
563         int result;
564 
565         switch (repo->dev_type) {
566         case PS3_DEV_TYPE_STOR_DISK:
567                 result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_DISK);
568 
569                 /* Some devices are not accessible from the Other OS lpar. */
570                 if (result == -ENODEV) {
571                         result = 0;
572                         pr_debug("%s:%u: not accessible\n", __func__,
573                                  __LINE__);
574                 }
575 
576                 if (result)
577                         pr_debug("%s:%u ps3_setup_storage_dev failed\n",
578                                  __func__, __LINE__);
579                 break;
580 
581         case PS3_DEV_TYPE_STOR_ROM:
582                 result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_ROM);
583                 if (result)
584                         pr_debug("%s:%u ps3_setup_storage_dev failed\n",
585                                  __func__, __LINE__);
586                 break;
587 
588         case PS3_DEV_TYPE_STOR_FLASH:
589                 result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_FLASH);
590                 if (result)
591                         pr_debug("%s:%u ps3_setup_storage_dev failed\n",
592                                  __func__, __LINE__);
593                 break;
594 
595         default:
596                 result = 0;
597                 pr_debug("%s:%u: unsupported dev_type %u\n", __func__, __LINE__,
598                         repo->dev_type);
599         }
600 
601         return result;
602 }
603 
604 /**
605  * ps3_setup_static_device - Setup a static device from the repository
606  */
607 
608 static int __init ps3_setup_static_device(const struct ps3_repository_device *repo)
609 {
610         int result;
611 
612         switch (repo->dev_type) {
613         case PS3_DEV_TYPE_SB_GELIC:
614                 result = ps3_setup_gelic_device(repo);
615                 if (result) {
616                         pr_debug("%s:%d ps3_setup_gelic_device failed\n",
617                                 __func__, __LINE__);
618                 }
619                 break;
620         case PS3_DEV_TYPE_SB_USB:
621 
622                 /* Each USB device has both an EHCI and an OHCI HC */
623 
624                 result = ps3_setup_ehci_device(repo);
625 
626                 if (result) {
627                         pr_debug("%s:%d ps3_setup_ehci_device failed\n",
628                                 __func__, __LINE__);
629                 }
630 
631                 result = ps3_setup_ohci_device(repo);
632 
633                 if (result) {
634                         pr_debug("%s:%d ps3_setup_ohci_device failed\n",
635                                 __func__, __LINE__);
636                 }
637                 break;
638 
639         default:
640                 return ps3_setup_dynamic_device(repo);
641         }
642 
643         return result;
644 }
645 
646 static void ps3_find_and_add_device(u64 bus_id, u64 dev_id)
647 {
648         struct ps3_repository_device repo;
649         int res;
650         unsigned int retries;
651         unsigned long rem;
652 
653         /*
654          * On some firmware versions (e.g. 1.90), the device may not show up
655          * in the repository immediately
656          */
657         for (retries = 0; retries < 10; retries++) {
658                 res = ps3_repository_find_device_by_id(&repo, bus_id, dev_id);
659                 if (!res)
660                         goto found;
661 
662                 rem = msleep_interruptible(100);
663                 if (rem)
664                         break;
665         }
666         pr_warning("%s:%u: device %llu:%llu not found\n", __func__, __LINE__,
667                    bus_id, dev_id);
668         return;
669 
670 found:
671         if (retries)
672                 pr_debug("%s:%u: device %llu:%llu found after %u retries\n",
673                          __func__, __LINE__, bus_id, dev_id, retries);
674 
675         ps3_setup_dynamic_device(&repo);
676         return;
677 }
678 
679 #define PS3_NOTIFICATION_DEV_ID         ULONG_MAX
680 #define PS3_NOTIFICATION_INTERRUPT_ID   0
681 
682 struct ps3_notification_device {
683         struct ps3_system_bus_device sbd;
684         spinlock_t lock;
685         u64 tag;
686         u64 lv1_status;
687         struct completion done;
688 };
689 
690 enum ps3_notify_type {
691         notify_device_ready = 0,
692         notify_region_probe = 1,
693         notify_region_update = 2,
694 };
695 
696 struct ps3_notify_cmd {
697         u64 operation_code;             /* must be zero */
698         u64 event_mask;                 /* OR of 1UL << enum ps3_notify_type */
699 };
700 
701 struct ps3_notify_event {
702         u64 event_type;                 /* enum ps3_notify_type */
703         u64 bus_id;
704         u64 dev_id;
705         u64 dev_type;
706         u64 dev_port;
707 };
708 
709 static irqreturn_t ps3_notification_interrupt(int irq, void *data)
710 {
711         struct ps3_notification_device *dev = data;
712         int res;
713         u64 tag, status;
714 
715         spin_lock(&dev->lock);
716         res = lv1_storage_get_async_status(PS3_NOTIFICATION_DEV_ID, &tag,
717                                            &status);
718         if (tag != dev->tag)
719                 pr_err("%s:%u: tag mismatch, got %llx, expected %llx\n",
720                        __func__, __LINE__, tag, dev->tag);
721 
722         if (res) {
723                 pr_err("%s:%u: res %d status 0x%llx\n", __func__, __LINE__, res,
724                        status);
725         } else {
726                 pr_debug("%s:%u: completed, status 0x%llx\n", __func__,
727                          __LINE__, status);
728                 dev->lv1_status = status;
729                 complete(&dev->done);
730         }
731         spin_unlock(&dev->lock);
732         return IRQ_HANDLED;
733 }
734 
735 static int ps3_notification_read_write(struct ps3_notification_device *dev,
736                                        u64 lpar, int write)
737 {
738         const char *op = write ? "write" : "read";
739         unsigned long flags;
740         int res;
741 
742         init_completion(&dev->done);
743         spin_lock_irqsave(&dev->lock, flags);
744         res = write ? lv1_storage_write(dev->sbd.dev_id, 0, 0, 1, 0, lpar,
745                                         &dev->tag)
746                     : lv1_storage_read(dev->sbd.dev_id, 0, 0, 1, 0, lpar,
747                                        &dev->tag);
748         spin_unlock_irqrestore(&dev->lock, flags);
749         if (res) {
750                 pr_err("%s:%u: %s failed %d\n", __func__, __LINE__, op, res);
751                 return -EPERM;
752         }
753         pr_debug("%s:%u: notification %s issued\n", __func__, __LINE__, op);
754 
755         res = wait_event_interruptible(dev->done.wait,
756                                        dev->done.done || kthread_should_stop());
757         if (kthread_should_stop())
758                 res = -EINTR;
759         if (res) {
760                 pr_debug("%s:%u: interrupted %s\n", __func__, __LINE__, op);
761                 return res;
762         }
763 
764         if (dev->lv1_status) {
765                 pr_err("%s:%u: %s not completed, status 0x%llx\n", __func__,
766                        __LINE__, op, dev->lv1_status);
767                 return -EIO;
768         }
769         pr_debug("%s:%u: notification %s completed\n", __func__, __LINE__, op);
770 
771         return 0;
772 }
773 
774 static struct task_struct *probe_task;
775 
776 /**
777  * ps3_probe_thread - Background repository probing at system startup.
778  *
779  * This implementation only supports background probing on a single bus.
780  * It uses the hypervisor's storage device notification mechanism to wait until
781  * a storage device is ready.  The device notification mechanism uses a
782  * pseudo device to asynchronously notify the guest when storage devices become
783  * ready.  The notification device has a block size of 512 bytes.
784  */
785 
786 static int ps3_probe_thread(void *data)
787 {
788         struct ps3_notification_device dev;
789         int res;
790         unsigned int irq;
791         u64 lpar;
792         void *buf;
793         struct ps3_notify_cmd *notify_cmd;
794         struct ps3_notify_event *notify_event;
795 
796         pr_debug(" -> %s:%u: kthread started\n", __func__, __LINE__);
797 
798         buf = kzalloc(512, GFP_KERNEL);
799         if (!buf)
800                 return -ENOMEM;
801 
802         lpar = ps3_mm_phys_to_lpar(__pa(buf));
803         notify_cmd = buf;
804         notify_event = buf;
805 
806         /* dummy system bus device */
807         dev.sbd.bus_id = (u64)data;
808         dev.sbd.dev_id = PS3_NOTIFICATION_DEV_ID;
809         dev.sbd.interrupt_id = PS3_NOTIFICATION_INTERRUPT_ID;
810 
811         res = lv1_open_device(dev.sbd.bus_id, dev.sbd.dev_id, 0);
812         if (res) {
813                 pr_err("%s:%u: lv1_open_device failed %s\n", __func__,
814                        __LINE__, ps3_result(res));
815                 goto fail_free;
816         }
817 
818         res = ps3_sb_event_receive_port_setup(&dev.sbd, PS3_BINDING_CPU_ANY,
819                                               &irq);
820         if (res) {
821                 pr_err("%s:%u: ps3_sb_event_receive_port_setup failed %d\n",
822                        __func__, __LINE__, res);
823                goto fail_close_device;
824         }
825 
826         spin_lock_init(&dev.lock);
827 
828         res = request_irq(irq, ps3_notification_interrupt, 0,
829                           "ps3_notification", &dev);
830         if (res) {
831                 pr_err("%s:%u: request_irq failed %d\n", __func__, __LINE__,
832                        res);
833                 goto fail_sb_event_receive_port_destroy;
834         }
835 
836         /* Setup and write the request for device notification. */
837         notify_cmd->operation_code = 0; /* must be zero */
838         notify_cmd->event_mask = 1UL << notify_region_probe;
839 
840         res = ps3_notification_read_write(&dev, lpar, 1);
841         if (res)
842                 goto fail_free_irq;
843 
844         /* Loop here processing the requested notification events. */
845         do {
846                 try_to_freeze();
847 
848                 memset(notify_event, 0, sizeof(*notify_event));
849 
850                 res = ps3_notification_read_write(&dev, lpar, 0);
851                 if (res)
852                         break;
853 
854                 pr_debug("%s:%u: notify event type 0x%llx bus id %llu dev id %llu"
855                          " type %llu port %llu\n", __func__, __LINE__,
856                          notify_event->event_type, notify_event->bus_id,
857                          notify_event->dev_id, notify_event->dev_type,
858                          notify_event->dev_port);
859 
860                 if (notify_event->event_type != notify_region_probe ||
861                     notify_event->bus_id != dev.sbd.bus_id) {
862                         pr_warning("%s:%u: bad notify_event: event %llu, "
863                                    "dev_id %llu, dev_type %llu\n",
864                                    __func__, __LINE__, notify_event->event_type,
865                                    notify_event->dev_id,
866                                    notify_event->dev_type);
867                         continue;
868                 }
869 
870                 ps3_find_and_add_device(dev.sbd.bus_id, notify_event->dev_id);
871 
872         } while (!kthread_should_stop());
873 
874 fail_free_irq:
875         free_irq(irq, &dev);
876 fail_sb_event_receive_port_destroy:
877         ps3_sb_event_receive_port_destroy(&dev.sbd, irq);
878 fail_close_device:
879         lv1_close_device(dev.sbd.bus_id, dev.sbd.dev_id);
880 fail_free:
881         kfree(buf);
882 
883         probe_task = NULL;
884 
885         pr_debug(" <- %s:%u: kthread finished\n", __func__, __LINE__);
886 
887         return 0;
888 }
889 
890 /**
891  * ps3_stop_probe_thread - Stops the background probe thread.
892  *
893  */
894 
895 static int ps3_stop_probe_thread(struct notifier_block *nb, unsigned long code,
896                                  void *data)
897 {
898         if (probe_task)
899                 kthread_stop(probe_task);
900         return 0;
901 }
902 
903 static struct notifier_block nb = {
904         .notifier_call = ps3_stop_probe_thread
905 };
906 
907 /**
908  * ps3_start_probe_thread - Starts the background probe thread.
909  *
910  */
911 
912 static int __init ps3_start_probe_thread(enum ps3_bus_type bus_type)
913 {
914         int result;
915         struct task_struct *task;
916         struct ps3_repository_device repo;
917 
918         pr_debug(" -> %s:%d\n", __func__, __LINE__);
919 
920         memset(&repo, 0, sizeof(repo));
921 
922         repo.bus_type = bus_type;
923 
924         result = ps3_repository_find_bus(repo.bus_type, 0, &repo.bus_index);
925 
926         if (result) {
927                 printk(KERN_ERR "%s: Cannot find bus (%d)\n", __func__, result);
928                 return -ENODEV;
929         }
930 
931         result = ps3_repository_read_bus_id(repo.bus_index, &repo.bus_id);
932 
933         if (result) {
934                 printk(KERN_ERR "%s: read_bus_id failed %d\n", __func__,
935                         result);
936                 return -ENODEV;
937         }
938 
939         task = kthread_run(ps3_probe_thread, (void *)repo.bus_id,
940                            "ps3-probe-%u", bus_type);
941 
942         if (IS_ERR(task)) {
943                 result = PTR_ERR(task);
944                 printk(KERN_ERR "%s: kthread_run failed %d\n", __func__,
945                        result);
946                 return result;
947         }
948 
949         probe_task = task;
950         register_reboot_notifier(&nb);
951 
952         pr_debug(" <- %s:%d\n", __func__, __LINE__);
953         return 0;
954 }
955 
956 /**
957  * ps3_register_devices - Probe the system and register devices found.
958  *
959  * A device_initcall() routine.
960  */
961 
962 static int __init ps3_register_devices(void)
963 {
964         int result;
965 
966         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
967                 return -ENODEV;
968 
969         pr_debug(" -> %s:%d\n", __func__, __LINE__);
970 
971         /* ps3_repository_dump_bus_info(); */
972 
973         result = ps3_start_probe_thread(PS3_BUS_TYPE_STORAGE);
974 
975         ps3_register_vuart_devices();
976 
977         ps3_register_graphics_devices();
978 
979         ps3_repository_find_devices(PS3_BUS_TYPE_SB, ps3_setup_static_device);
980 
981         ps3_register_sound_devices();
982 
983         ps3_register_lpm_devices();
984 
985         ps3_register_ramdisk_device();
986 
987         pr_debug(" <- %s:%d\n", __func__, __LINE__);
988         return 0;
989 }
990 
991 device_initcall(ps3_register_devices);
992 

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