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TOMOYO Linux Cross Reference
Linux/arch/powerpc/platforms/ps3/system-bus.c

Version: ~ [ linux-5.3-rc5 ] ~ [ linux-5.2.9 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.67 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.139 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.189 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.189 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.72 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
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  1 /*
  2  *  PS3 system bus driver.
  3  *
  4  *  Copyright (C) 2006 Sony Computer Entertainment Inc.
  5  *  Copyright 2006 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/kernel.h>
 22 #include <linux/init.h>
 23 #include <linux/export.h>
 24 #include <linux/dma-mapping.h>
 25 #include <linux/err.h>
 26 #include <linux/slab.h>
 27 
 28 #include <asm/udbg.h>
 29 #include <asm/lv1call.h>
 30 #include <asm/firmware.h>
 31 #include <asm/cell-regs.h>
 32 
 33 #include "platform.h"
 34 
 35 static struct device ps3_system_bus = {
 36         .init_name = "ps3_system",
 37 };
 38 
 39 /* FIXME: need device usage counters! */
 40 struct {
 41         struct mutex mutex;
 42         int sb_11; /* usb 0 */
 43         int sb_12; /* usb 0 */
 44         int gpu;
 45 } static usage_hack;
 46 
 47 static int ps3_is_device(struct ps3_system_bus_device *dev, u64 bus_id,
 48                          u64 dev_id)
 49 {
 50         return dev->bus_id == bus_id && dev->dev_id == dev_id;
 51 }
 52 
 53 static int ps3_open_hv_device_sb(struct ps3_system_bus_device *dev)
 54 {
 55         int result;
 56 
 57         BUG_ON(!dev->bus_id);
 58         mutex_lock(&usage_hack.mutex);
 59 
 60         if (ps3_is_device(dev, 1, 1)) {
 61                 usage_hack.sb_11++;
 62                 if (usage_hack.sb_11 > 1) {
 63                         result = 0;
 64                         goto done;
 65                 }
 66         }
 67 
 68         if (ps3_is_device(dev, 1, 2)) {
 69                 usage_hack.sb_12++;
 70                 if (usage_hack.sb_12 > 1) {
 71                         result = 0;
 72                         goto done;
 73                 }
 74         }
 75 
 76         result = lv1_open_device(dev->bus_id, dev->dev_id, 0);
 77 
 78         if (result) {
 79                 pr_debug("%s:%d: lv1_open_device failed: %s\n", __func__,
 80                         __LINE__, ps3_result(result));
 81                         result = -EPERM;
 82         }
 83 
 84 done:
 85         mutex_unlock(&usage_hack.mutex);
 86         return result;
 87 }
 88 
 89 static int ps3_close_hv_device_sb(struct ps3_system_bus_device *dev)
 90 {
 91         int result;
 92 
 93         BUG_ON(!dev->bus_id);
 94         mutex_lock(&usage_hack.mutex);
 95 
 96         if (ps3_is_device(dev, 1, 1)) {
 97                 usage_hack.sb_11--;
 98                 if (usage_hack.sb_11) {
 99                         result = 0;
100                         goto done;
101                 }
102         }
103 
104         if (ps3_is_device(dev, 1, 2)) {
105                 usage_hack.sb_12--;
106                 if (usage_hack.sb_12) {
107                         result = 0;
108                         goto done;
109                 }
110         }
111 
112         result = lv1_close_device(dev->bus_id, dev->dev_id);
113         BUG_ON(result);
114 
115 done:
116         mutex_unlock(&usage_hack.mutex);
117         return result;
118 }
119 
120 static int ps3_open_hv_device_gpu(struct ps3_system_bus_device *dev)
121 {
122         int result;
123 
124         mutex_lock(&usage_hack.mutex);
125 
126         usage_hack.gpu++;
127         if (usage_hack.gpu > 1) {
128                 result = 0;
129                 goto done;
130         }
131 
132         result = lv1_gpu_open(0);
133 
134         if (result) {
135                 pr_debug("%s:%d: lv1_gpu_open failed: %s\n", __func__,
136                         __LINE__, ps3_result(result));
137                         result = -EPERM;
138         }
139 
140 done:
141         mutex_unlock(&usage_hack.mutex);
142         return result;
143 }
144 
145 static int ps3_close_hv_device_gpu(struct ps3_system_bus_device *dev)
146 {
147         int result;
148 
149         mutex_lock(&usage_hack.mutex);
150 
151         usage_hack.gpu--;
152         if (usage_hack.gpu) {
153                 result = 0;
154                 goto done;
155         }
156 
157         result = lv1_gpu_close();
158         BUG_ON(result);
159 
160 done:
161         mutex_unlock(&usage_hack.mutex);
162         return result;
163 }
164 
165 int ps3_open_hv_device(struct ps3_system_bus_device *dev)
166 {
167         BUG_ON(!dev);
168         pr_debug("%s:%d: match_id: %u\n", __func__, __LINE__, dev->match_id);
169 
170         switch (dev->match_id) {
171         case PS3_MATCH_ID_EHCI:
172         case PS3_MATCH_ID_OHCI:
173         case PS3_MATCH_ID_GELIC:
174         case PS3_MATCH_ID_STOR_DISK:
175         case PS3_MATCH_ID_STOR_ROM:
176         case PS3_MATCH_ID_STOR_FLASH:
177                 return ps3_open_hv_device_sb(dev);
178 
179         case PS3_MATCH_ID_SOUND:
180         case PS3_MATCH_ID_GPU:
181                 return ps3_open_hv_device_gpu(dev);
182 
183         case PS3_MATCH_ID_AV_SETTINGS:
184         case PS3_MATCH_ID_SYSTEM_MANAGER:
185                 pr_debug("%s:%d: unsupported match_id: %u\n", __func__,
186                         __LINE__, dev->match_id);
187                 pr_debug("%s:%d: bus_id: %llu\n", __func__, __LINE__,
188                         dev->bus_id);
189                 BUG();
190                 return -EINVAL;
191 
192         default:
193                 break;
194         }
195 
196         pr_debug("%s:%d: unknown match_id: %u\n", __func__, __LINE__,
197                 dev->match_id);
198         BUG();
199         return -ENODEV;
200 }
201 EXPORT_SYMBOL_GPL(ps3_open_hv_device);
202 
203 int ps3_close_hv_device(struct ps3_system_bus_device *dev)
204 {
205         BUG_ON(!dev);
206         pr_debug("%s:%d: match_id: %u\n", __func__, __LINE__, dev->match_id);
207 
208         switch (dev->match_id) {
209         case PS3_MATCH_ID_EHCI:
210         case PS3_MATCH_ID_OHCI:
211         case PS3_MATCH_ID_GELIC:
212         case PS3_MATCH_ID_STOR_DISK:
213         case PS3_MATCH_ID_STOR_ROM:
214         case PS3_MATCH_ID_STOR_FLASH:
215                 return ps3_close_hv_device_sb(dev);
216 
217         case PS3_MATCH_ID_SOUND:
218         case PS3_MATCH_ID_GPU:
219                 return ps3_close_hv_device_gpu(dev);
220 
221         case PS3_MATCH_ID_AV_SETTINGS:
222         case PS3_MATCH_ID_SYSTEM_MANAGER:
223                 pr_debug("%s:%d: unsupported match_id: %u\n", __func__,
224                         __LINE__, dev->match_id);
225                 pr_debug("%s:%d: bus_id: %llu\n", __func__, __LINE__,
226                         dev->bus_id);
227                 BUG();
228                 return -EINVAL;
229 
230         default:
231                 break;
232         }
233 
234         pr_debug("%s:%d: unknown match_id: %u\n", __func__, __LINE__,
235                 dev->match_id);
236         BUG();
237         return -ENODEV;
238 }
239 EXPORT_SYMBOL_GPL(ps3_close_hv_device);
240 
241 #define dump_mmio_region(_a) _dump_mmio_region(_a, __func__, __LINE__)
242 static void _dump_mmio_region(const struct ps3_mmio_region* r,
243         const char* func, int line)
244 {
245         pr_debug("%s:%d: dev       %llu:%llu\n", func, line, r->dev->bus_id,
246                 r->dev->dev_id);
247         pr_debug("%s:%d: bus_addr  %lxh\n", func, line, r->bus_addr);
248         pr_debug("%s:%d: len       %lxh\n", func, line, r->len);
249         pr_debug("%s:%d: lpar_addr %lxh\n", func, line, r->lpar_addr);
250 }
251 
252 static int ps3_sb_mmio_region_create(struct ps3_mmio_region *r)
253 {
254         int result;
255         u64 lpar_addr;
256 
257         result = lv1_map_device_mmio_region(r->dev->bus_id, r->dev->dev_id,
258                 r->bus_addr, r->len, r->page_size, &lpar_addr);
259         r->lpar_addr = lpar_addr;
260 
261         if (result) {
262                 pr_debug("%s:%d: lv1_map_device_mmio_region failed: %s\n",
263                         __func__, __LINE__, ps3_result(result));
264                 r->lpar_addr = 0;
265         }
266 
267         dump_mmio_region(r);
268         return result;
269 }
270 
271 static int ps3_ioc0_mmio_region_create(struct ps3_mmio_region *r)
272 {
273         /* device specific; do nothing currently */
274         return 0;
275 }
276 
277 int ps3_mmio_region_create(struct ps3_mmio_region *r)
278 {
279         return r->mmio_ops->create(r);
280 }
281 EXPORT_SYMBOL_GPL(ps3_mmio_region_create);
282 
283 static int ps3_sb_free_mmio_region(struct ps3_mmio_region *r)
284 {
285         int result;
286 
287         dump_mmio_region(r);
288         result = lv1_unmap_device_mmio_region(r->dev->bus_id, r->dev->dev_id,
289                 r->lpar_addr);
290 
291         if (result)
292                 pr_debug("%s:%d: lv1_unmap_device_mmio_region failed: %s\n",
293                         __func__, __LINE__, ps3_result(result));
294 
295         r->lpar_addr = 0;
296         return result;
297 }
298 
299 static int ps3_ioc0_free_mmio_region(struct ps3_mmio_region *r)
300 {
301         /* device specific; do nothing currently */
302         return 0;
303 }
304 
305 
306 int ps3_free_mmio_region(struct ps3_mmio_region *r)
307 {
308         return r->mmio_ops->free(r);
309 }
310 
311 EXPORT_SYMBOL_GPL(ps3_free_mmio_region);
312 
313 static const struct ps3_mmio_region_ops ps3_mmio_sb_region_ops = {
314         .create = ps3_sb_mmio_region_create,
315         .free = ps3_sb_free_mmio_region
316 };
317 
318 static const struct ps3_mmio_region_ops ps3_mmio_ioc0_region_ops = {
319         .create = ps3_ioc0_mmio_region_create,
320         .free = ps3_ioc0_free_mmio_region
321 };
322 
323 int ps3_mmio_region_init(struct ps3_system_bus_device *dev,
324         struct ps3_mmio_region *r, unsigned long bus_addr, unsigned long len,
325         enum ps3_mmio_page_size page_size)
326 {
327         r->dev = dev;
328         r->bus_addr = bus_addr;
329         r->len = len;
330         r->page_size = page_size;
331         switch (dev->dev_type) {
332         case PS3_DEVICE_TYPE_SB:
333                 r->mmio_ops = &ps3_mmio_sb_region_ops;
334                 break;
335         case PS3_DEVICE_TYPE_IOC0:
336                 r->mmio_ops = &ps3_mmio_ioc0_region_ops;
337                 break;
338         default:
339                 BUG();
340                 return -EINVAL;
341         }
342         return 0;
343 }
344 EXPORT_SYMBOL_GPL(ps3_mmio_region_init);
345 
346 static int ps3_system_bus_match(struct device *_dev,
347         struct device_driver *_drv)
348 {
349         int result;
350         struct ps3_system_bus_driver *drv = ps3_drv_to_system_bus_drv(_drv);
351         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
352 
353         if (!dev->match_sub_id)
354                 result = dev->match_id == drv->match_id;
355         else
356                 result = dev->match_sub_id == drv->match_sub_id &&
357                         dev->match_id == drv->match_id;
358 
359         if (result)
360                 pr_info("%s:%d: dev=%u.%u(%s), drv=%u.%u(%s): match\n",
361                         __func__, __LINE__,
362                         dev->match_id, dev->match_sub_id, dev_name(&dev->core),
363                         drv->match_id, drv->match_sub_id, drv->core.name);
364         else
365                 pr_debug("%s:%d: dev=%u.%u(%s), drv=%u.%u(%s): miss\n",
366                         __func__, __LINE__,
367                         dev->match_id, dev->match_sub_id, dev_name(&dev->core),
368                         drv->match_id, drv->match_sub_id, drv->core.name);
369 
370         return result;
371 }
372 
373 static int ps3_system_bus_probe(struct device *_dev)
374 {
375         int result = 0;
376         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
377         struct ps3_system_bus_driver *drv;
378 
379         BUG_ON(!dev);
380         dev_dbg(_dev, "%s:%d\n", __func__, __LINE__);
381 
382         drv = ps3_system_bus_dev_to_system_bus_drv(dev);
383         BUG_ON(!drv);
384 
385         if (drv->probe)
386                 result = drv->probe(dev);
387         else
388                 pr_debug("%s:%d: %s no probe method\n", __func__, __LINE__,
389                         dev_name(&dev->core));
390 
391         pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, dev_name(&dev->core));
392         return result;
393 }
394 
395 static int ps3_system_bus_remove(struct device *_dev)
396 {
397         int result = 0;
398         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
399         struct ps3_system_bus_driver *drv;
400 
401         BUG_ON(!dev);
402         dev_dbg(_dev, "%s:%d\n", __func__, __LINE__);
403 
404         drv = ps3_system_bus_dev_to_system_bus_drv(dev);
405         BUG_ON(!drv);
406 
407         if (drv->remove)
408                 result = drv->remove(dev);
409         else
410                 dev_dbg(&dev->core, "%s:%d %s: no remove method\n",
411                         __func__, __LINE__, drv->core.name);
412 
413         pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, dev_name(&dev->core));
414         return result;
415 }
416 
417 static void ps3_system_bus_shutdown(struct device *_dev)
418 {
419         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
420         struct ps3_system_bus_driver *drv;
421 
422         BUG_ON(!dev);
423 
424         dev_dbg(&dev->core, " -> %s:%d: match_id %d\n", __func__, __LINE__,
425                 dev->match_id);
426 
427         if (!dev->core.driver) {
428                 dev_dbg(&dev->core, "%s:%d: no driver bound\n", __func__,
429                         __LINE__);
430                 return;
431         }
432 
433         drv = ps3_system_bus_dev_to_system_bus_drv(dev);
434 
435         BUG_ON(!drv);
436 
437         dev_dbg(&dev->core, "%s:%d: %s -> %s\n", __func__, __LINE__,
438                 dev_name(&dev->core), drv->core.name);
439 
440         if (drv->shutdown)
441                 drv->shutdown(dev);
442         else if (drv->remove) {
443                 dev_dbg(&dev->core, "%s:%d %s: no shutdown, calling remove\n",
444                         __func__, __LINE__, drv->core.name);
445                 drv->remove(dev);
446         } else {
447                 dev_dbg(&dev->core, "%s:%d %s: no shutdown method\n",
448                         __func__, __LINE__, drv->core.name);
449                 BUG();
450         }
451 
452         dev_dbg(&dev->core, " <- %s:%d\n", __func__, __LINE__);
453 }
454 
455 static int ps3_system_bus_uevent(struct device *_dev, struct kobj_uevent_env *env)
456 {
457         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
458 
459         if (add_uevent_var(env, "MODALIAS=ps3:%d:%d", dev->match_id,
460                            dev->match_sub_id))
461                 return -ENOMEM;
462         return 0;
463 }
464 
465 static ssize_t modalias_show(struct device *_dev, struct device_attribute *a,
466         char *buf)
467 {
468         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
469         int len = snprintf(buf, PAGE_SIZE, "ps3:%d:%d\n", dev->match_id,
470                            dev->match_sub_id);
471 
472         return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
473 }
474 
475 static struct device_attribute ps3_system_bus_dev_attrs[] = {
476         __ATTR_RO(modalias),
477         __ATTR_NULL,
478 };
479 
480 struct bus_type ps3_system_bus_type = {
481         .name = "ps3_system_bus",
482         .match = ps3_system_bus_match,
483         .uevent = ps3_system_bus_uevent,
484         .probe = ps3_system_bus_probe,
485         .remove = ps3_system_bus_remove,
486         .shutdown = ps3_system_bus_shutdown,
487         .dev_attrs = ps3_system_bus_dev_attrs,
488 };
489 
490 static int __init ps3_system_bus_init(void)
491 {
492         int result;
493 
494         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
495                 return -ENODEV;
496 
497         pr_debug(" -> %s:%d\n", __func__, __LINE__);
498 
499         mutex_init(&usage_hack.mutex);
500 
501         result = device_register(&ps3_system_bus);
502         BUG_ON(result);
503 
504         result = bus_register(&ps3_system_bus_type);
505         BUG_ON(result);
506 
507         pr_debug(" <- %s:%d\n", __func__, __LINE__);
508         return result;
509 }
510 
511 core_initcall(ps3_system_bus_init);
512 
513 /* Allocates a contiguous real buffer and creates mappings over it.
514  * Returns the virtual address of the buffer and sets dma_handle
515  * to the dma address (mapping) of the first page.
516  */
517 static void * ps3_alloc_coherent(struct device *_dev, size_t size,
518                                  dma_addr_t *dma_handle, gfp_t flag,
519                                  struct dma_attrs *attrs)
520 {
521         int result;
522         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
523         unsigned long virt_addr;
524 
525         flag &= ~(__GFP_DMA | __GFP_HIGHMEM);
526         flag |= __GFP_ZERO;
527 
528         virt_addr = __get_free_pages(flag, get_order(size));
529 
530         if (!virt_addr) {
531                 pr_debug("%s:%d: get_free_pages failed\n", __func__, __LINE__);
532                 goto clean_none;
533         }
534 
535         result = ps3_dma_map(dev->d_region, virt_addr, size, dma_handle,
536                              CBE_IOPTE_PP_W | CBE_IOPTE_PP_R |
537                              CBE_IOPTE_SO_RW | CBE_IOPTE_M);
538 
539         if (result) {
540                 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
541                         __func__, __LINE__, result);
542                 BUG_ON("check region type");
543                 goto clean_alloc;
544         }
545 
546         return (void*)virt_addr;
547 
548 clean_alloc:
549         free_pages(virt_addr, get_order(size));
550 clean_none:
551         dma_handle = NULL;
552         return NULL;
553 }
554 
555 static void ps3_free_coherent(struct device *_dev, size_t size, void *vaddr,
556                               dma_addr_t dma_handle, struct dma_attrs *attrs)
557 {
558         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
559 
560         ps3_dma_unmap(dev->d_region, dma_handle, size);
561         free_pages((unsigned long)vaddr, get_order(size));
562 }
563 
564 /* Creates TCEs for a user provided buffer.  The user buffer must be
565  * contiguous real kernel storage (not vmalloc).  The address passed here
566  * comprises a page address and offset into that page. The dma_addr_t
567  * returned will point to the same byte within the page as was passed in.
568  */
569 
570 static dma_addr_t ps3_sb_map_page(struct device *_dev, struct page *page,
571         unsigned long offset, size_t size, enum dma_data_direction direction,
572         struct dma_attrs *attrs)
573 {
574         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
575         int result;
576         dma_addr_t bus_addr;
577         void *ptr = page_address(page) + offset;
578 
579         result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
580                              &bus_addr,
581                              CBE_IOPTE_PP_R | CBE_IOPTE_PP_W |
582                              CBE_IOPTE_SO_RW | CBE_IOPTE_M);
583 
584         if (result) {
585                 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
586                         __func__, __LINE__, result);
587         }
588 
589         return bus_addr;
590 }
591 
592 static dma_addr_t ps3_ioc0_map_page(struct device *_dev, struct page *page,
593                                     unsigned long offset, size_t size,
594                                     enum dma_data_direction direction,
595                                     struct dma_attrs *attrs)
596 {
597         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
598         int result;
599         dma_addr_t bus_addr;
600         u64 iopte_flag;
601         void *ptr = page_address(page) + offset;
602 
603         iopte_flag = CBE_IOPTE_M;
604         switch (direction) {
605         case DMA_BIDIRECTIONAL:
606                 iopte_flag |= CBE_IOPTE_PP_R | CBE_IOPTE_PP_W | CBE_IOPTE_SO_RW;
607                 break;
608         case DMA_TO_DEVICE:
609                 iopte_flag |= CBE_IOPTE_PP_R | CBE_IOPTE_SO_R;
610                 break;
611         case DMA_FROM_DEVICE:
612                 iopte_flag |= CBE_IOPTE_PP_W | CBE_IOPTE_SO_RW;
613                 break;
614         default:
615                 /* not happned */
616                 BUG();
617         };
618         result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
619                              &bus_addr, iopte_flag);
620 
621         if (result) {
622                 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
623                         __func__, __LINE__, result);
624         }
625         return bus_addr;
626 }
627 
628 static void ps3_unmap_page(struct device *_dev, dma_addr_t dma_addr,
629         size_t size, enum dma_data_direction direction, struct dma_attrs *attrs)
630 {
631         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
632         int result;
633 
634         result = ps3_dma_unmap(dev->d_region, dma_addr, size);
635 
636         if (result) {
637                 pr_debug("%s:%d: ps3_dma_unmap failed (%d)\n",
638                         __func__, __LINE__, result);
639         }
640 }
641 
642 static int ps3_sb_map_sg(struct device *_dev, struct scatterlist *sgl,
643         int nents, enum dma_data_direction direction, struct dma_attrs *attrs)
644 {
645 #if defined(CONFIG_PS3_DYNAMIC_DMA)
646         BUG_ON("do");
647         return -EPERM;
648 #else
649         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
650         struct scatterlist *sg;
651         int i;
652 
653         for_each_sg(sgl, sg, nents, i) {
654                 int result = ps3_dma_map(dev->d_region, sg_phys(sg),
655                                         sg->length, &sg->dma_address, 0);
656 
657                 if (result) {
658                         pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
659                                 __func__, __LINE__, result);
660                         return -EINVAL;
661                 }
662 
663                 sg->dma_length = sg->length;
664         }
665 
666         return nents;
667 #endif
668 }
669 
670 static int ps3_ioc0_map_sg(struct device *_dev, struct scatterlist *sg,
671                            int nents,
672                            enum dma_data_direction direction,
673                            struct dma_attrs *attrs)
674 {
675         BUG();
676         return 0;
677 }
678 
679 static void ps3_sb_unmap_sg(struct device *_dev, struct scatterlist *sg,
680         int nents, enum dma_data_direction direction, struct dma_attrs *attrs)
681 {
682 #if defined(CONFIG_PS3_DYNAMIC_DMA)
683         BUG_ON("do");
684 #endif
685 }
686 
687 static void ps3_ioc0_unmap_sg(struct device *_dev, struct scatterlist *sg,
688                             int nents, enum dma_data_direction direction,
689                             struct dma_attrs *attrs)
690 {
691         BUG();
692 }
693 
694 static int ps3_dma_supported(struct device *_dev, u64 mask)
695 {
696         return mask >= DMA_BIT_MASK(32);
697 }
698 
699 static u64 ps3_dma_get_required_mask(struct device *_dev)
700 {
701         return DMA_BIT_MASK(32);
702 }
703 
704 static struct dma_map_ops ps3_sb_dma_ops = {
705         .alloc = ps3_alloc_coherent,
706         .free = ps3_free_coherent,
707         .map_sg = ps3_sb_map_sg,
708         .unmap_sg = ps3_sb_unmap_sg,
709         .dma_supported = ps3_dma_supported,
710         .get_required_mask = ps3_dma_get_required_mask,
711         .map_page = ps3_sb_map_page,
712         .unmap_page = ps3_unmap_page,
713 };
714 
715 static struct dma_map_ops ps3_ioc0_dma_ops = {
716         .alloc = ps3_alloc_coherent,
717         .free = ps3_free_coherent,
718         .map_sg = ps3_ioc0_map_sg,
719         .unmap_sg = ps3_ioc0_unmap_sg,
720         .dma_supported = ps3_dma_supported,
721         .get_required_mask = ps3_dma_get_required_mask,
722         .map_page = ps3_ioc0_map_page,
723         .unmap_page = ps3_unmap_page,
724 };
725 
726 /**
727  * ps3_system_bus_release_device - remove a device from the system bus
728  */
729 
730 static void ps3_system_bus_release_device(struct device *_dev)
731 {
732         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
733         kfree(dev);
734 }
735 
736 /**
737  * ps3_system_bus_device_register - add a device to the system bus
738  *
739  * ps3_system_bus_device_register() expects the dev object to be allocated
740  * dynamically by the caller.  The system bus takes ownership of the dev
741  * object and frees the object in ps3_system_bus_release_device().
742  */
743 
744 int ps3_system_bus_device_register(struct ps3_system_bus_device *dev)
745 {
746         int result;
747         static unsigned int dev_ioc0_count;
748         static unsigned int dev_sb_count;
749         static unsigned int dev_vuart_count;
750         static unsigned int dev_lpm_count;
751 
752         if (!dev->core.parent)
753                 dev->core.parent = &ps3_system_bus;
754         dev->core.bus = &ps3_system_bus_type;
755         dev->core.release = ps3_system_bus_release_device;
756 
757         switch (dev->dev_type) {
758         case PS3_DEVICE_TYPE_IOC0:
759                 dev->core.archdata.dma_ops = &ps3_ioc0_dma_ops;
760                 dev_set_name(&dev->core, "ioc0_%02x", ++dev_ioc0_count);
761                 break;
762         case PS3_DEVICE_TYPE_SB:
763                 dev->core.archdata.dma_ops = &ps3_sb_dma_ops;
764                 dev_set_name(&dev->core, "sb_%02x", ++dev_sb_count);
765 
766                 break;
767         case PS3_DEVICE_TYPE_VUART:
768                 dev_set_name(&dev->core, "vuart_%02x", ++dev_vuart_count);
769                 break;
770         case PS3_DEVICE_TYPE_LPM:
771                 dev_set_name(&dev->core, "lpm_%02x", ++dev_lpm_count);
772                 break;
773         default:
774                 BUG();
775         };
776 
777         dev->core.of_node = NULL;
778         set_dev_node(&dev->core, 0);
779 
780         pr_debug("%s:%d add %s\n", __func__, __LINE__, dev_name(&dev->core));
781 
782         result = device_register(&dev->core);
783         return result;
784 }
785 
786 EXPORT_SYMBOL_GPL(ps3_system_bus_device_register);
787 
788 int ps3_system_bus_driver_register(struct ps3_system_bus_driver *drv)
789 {
790         int result;
791 
792         pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, drv->core.name);
793 
794         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
795                 return -ENODEV;
796 
797         drv->core.bus = &ps3_system_bus_type;
798 
799         result = driver_register(&drv->core);
800         pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, drv->core.name);
801         return result;
802 }
803 
804 EXPORT_SYMBOL_GPL(ps3_system_bus_driver_register);
805 
806 void ps3_system_bus_driver_unregister(struct ps3_system_bus_driver *drv)
807 {
808         pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, drv->core.name);
809         driver_unregister(&drv->core);
810         pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, drv->core.name);
811 }
812 
813 EXPORT_SYMBOL_GPL(ps3_system_bus_driver_unregister);
814 

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