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

Version: ~ [ linux-4.16-rc2 ] ~ [ linux-4.15.4 ] ~ [ linux-4.14.20 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.82 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.116 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.49 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.95 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.54 ] ~ [ 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-3.2.99 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.39.4 ] ~ [ linux-2.6.38.8 ] ~ [ linux-2.6.37.6 ] ~ [ linux-2.6.36.4 ] ~ [ linux-2.6.35.14 ] ~ [ linux-2.6.34.15 ] ~ [ linux-2.6.33.20 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.27.62 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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 static DEVICE_ATTR_RO(modalias);
475 
476 static struct attribute *ps3_system_bus_dev_attrs[] = {
477         &dev_attr_modalias.attr,
478         NULL,
479 };
480 ATTRIBUTE_GROUPS(ps3_system_bus_dev);
481 
482 struct bus_type ps3_system_bus_type = {
483         .name = "ps3_system_bus",
484         .match = ps3_system_bus_match,
485         .uevent = ps3_system_bus_uevent,
486         .probe = ps3_system_bus_probe,
487         .remove = ps3_system_bus_remove,
488         .shutdown = ps3_system_bus_shutdown,
489         .dev_groups = ps3_system_bus_dev_groups,
490 };
491 
492 static int __init ps3_system_bus_init(void)
493 {
494         int result;
495 
496         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
497                 return -ENODEV;
498 
499         pr_debug(" -> %s:%d\n", __func__, __LINE__);
500 
501         mutex_init(&usage_hack.mutex);
502 
503         result = device_register(&ps3_system_bus);
504         BUG_ON(result);
505 
506         result = bus_register(&ps3_system_bus_type);
507         BUG_ON(result);
508 
509         pr_debug(" <- %s:%d\n", __func__, __LINE__);
510         return result;
511 }
512 
513 core_initcall(ps3_system_bus_init);
514 
515 /* Allocates a contiguous real buffer and creates mappings over it.
516  * Returns the virtual address of the buffer and sets dma_handle
517  * to the dma address (mapping) of the first page.
518  */
519 static void * ps3_alloc_coherent(struct device *_dev, size_t size,
520                                  dma_addr_t *dma_handle, gfp_t flag,
521                                  unsigned long attrs)
522 {
523         int result;
524         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
525         unsigned long virt_addr;
526 
527         flag &= ~(__GFP_DMA | __GFP_HIGHMEM);
528         flag |= __GFP_ZERO;
529 
530         virt_addr = __get_free_pages(flag, get_order(size));
531 
532         if (!virt_addr) {
533                 pr_debug("%s:%d: get_free_pages failed\n", __func__, __LINE__);
534                 goto clean_none;
535         }
536 
537         result = ps3_dma_map(dev->d_region, virt_addr, size, dma_handle,
538                              CBE_IOPTE_PP_W | CBE_IOPTE_PP_R |
539                              CBE_IOPTE_SO_RW | CBE_IOPTE_M);
540 
541         if (result) {
542                 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
543                         __func__, __LINE__, result);
544                 BUG_ON("check region type");
545                 goto clean_alloc;
546         }
547 
548         return (void*)virt_addr;
549 
550 clean_alloc:
551         free_pages(virt_addr, get_order(size));
552 clean_none:
553         dma_handle = NULL;
554         return NULL;
555 }
556 
557 static void ps3_free_coherent(struct device *_dev, size_t size, void *vaddr,
558                               dma_addr_t dma_handle, unsigned long attrs)
559 {
560         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
561 
562         ps3_dma_unmap(dev->d_region, dma_handle, size);
563         free_pages((unsigned long)vaddr, get_order(size));
564 }
565 
566 /* Creates TCEs for a user provided buffer.  The user buffer must be
567  * contiguous real kernel storage (not vmalloc).  The address passed here
568  * comprises a page address and offset into that page. The dma_addr_t
569  * returned will point to the same byte within the page as was passed in.
570  */
571 
572 static dma_addr_t ps3_sb_map_page(struct device *_dev, struct page *page,
573         unsigned long offset, size_t size, enum dma_data_direction direction,
574         unsigned long attrs)
575 {
576         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
577         int result;
578         dma_addr_t bus_addr;
579         void *ptr = page_address(page) + offset;
580 
581         result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
582                              &bus_addr,
583                              CBE_IOPTE_PP_R | CBE_IOPTE_PP_W |
584                              CBE_IOPTE_SO_RW | CBE_IOPTE_M);
585 
586         if (result) {
587                 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
588                         __func__, __LINE__, result);
589         }
590 
591         return bus_addr;
592 }
593 
594 static dma_addr_t ps3_ioc0_map_page(struct device *_dev, struct page *page,
595                                     unsigned long offset, size_t size,
596                                     enum dma_data_direction direction,
597                                     unsigned long attrs)
598 {
599         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
600         int result;
601         dma_addr_t bus_addr;
602         u64 iopte_flag;
603         void *ptr = page_address(page) + offset;
604 
605         iopte_flag = CBE_IOPTE_M;
606         switch (direction) {
607         case DMA_BIDIRECTIONAL:
608                 iopte_flag |= CBE_IOPTE_PP_R | CBE_IOPTE_PP_W | CBE_IOPTE_SO_RW;
609                 break;
610         case DMA_TO_DEVICE:
611                 iopte_flag |= CBE_IOPTE_PP_R | CBE_IOPTE_SO_R;
612                 break;
613         case DMA_FROM_DEVICE:
614                 iopte_flag |= CBE_IOPTE_PP_W | CBE_IOPTE_SO_RW;
615                 break;
616         default:
617                 /* not happned */
618                 BUG();
619         };
620         result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
621                              &bus_addr, iopte_flag);
622 
623         if (result) {
624                 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
625                         __func__, __LINE__, result);
626         }
627         return bus_addr;
628 }
629 
630 static void ps3_unmap_page(struct device *_dev, dma_addr_t dma_addr,
631         size_t size, enum dma_data_direction direction, unsigned long attrs)
632 {
633         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
634         int result;
635 
636         result = ps3_dma_unmap(dev->d_region, dma_addr, size);
637 
638         if (result) {
639                 pr_debug("%s:%d: ps3_dma_unmap failed (%d)\n",
640                         __func__, __LINE__, result);
641         }
642 }
643 
644 static int ps3_sb_map_sg(struct device *_dev, struct scatterlist *sgl,
645         int nents, enum dma_data_direction direction, unsigned long attrs)
646 {
647 #if defined(CONFIG_PS3_DYNAMIC_DMA)
648         BUG_ON("do");
649         return -EPERM;
650 #else
651         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
652         struct scatterlist *sg;
653         int i;
654 
655         for_each_sg(sgl, sg, nents, i) {
656                 int result = ps3_dma_map(dev->d_region, sg_phys(sg),
657                                         sg->length, &sg->dma_address, 0);
658 
659                 if (result) {
660                         pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
661                                 __func__, __LINE__, result);
662                         return -EINVAL;
663                 }
664 
665                 sg->dma_length = sg->length;
666         }
667 
668         return nents;
669 #endif
670 }
671 
672 static int ps3_ioc0_map_sg(struct device *_dev, struct scatterlist *sg,
673                            int nents,
674                            enum dma_data_direction direction,
675                            unsigned long attrs)
676 {
677         BUG();
678         return 0;
679 }
680 
681 static void ps3_sb_unmap_sg(struct device *_dev, struct scatterlist *sg,
682         int nents, enum dma_data_direction direction, unsigned long attrs)
683 {
684 #if defined(CONFIG_PS3_DYNAMIC_DMA)
685         BUG_ON("do");
686 #endif
687 }
688 
689 static void ps3_ioc0_unmap_sg(struct device *_dev, struct scatterlist *sg,
690                             int nents, enum dma_data_direction direction,
691                             unsigned long attrs)
692 {
693         BUG();
694 }
695 
696 static int ps3_dma_supported(struct device *_dev, u64 mask)
697 {
698         return mask >= DMA_BIT_MASK(32);
699 }
700 
701 static u64 ps3_dma_get_required_mask(struct device *_dev)
702 {
703         return DMA_BIT_MASK(32);
704 }
705 
706 static const struct dma_map_ops ps3_sb_dma_ops = {
707         .alloc = ps3_alloc_coherent,
708         .free = ps3_free_coherent,
709         .map_sg = ps3_sb_map_sg,
710         .unmap_sg = ps3_sb_unmap_sg,
711         .dma_supported = ps3_dma_supported,
712         .get_required_mask = ps3_dma_get_required_mask,
713         .map_page = ps3_sb_map_page,
714         .unmap_page = ps3_unmap_page,
715 };
716 
717 static const struct dma_map_ops ps3_ioc0_dma_ops = {
718         .alloc = ps3_alloc_coherent,
719         .free = ps3_free_coherent,
720         .map_sg = ps3_ioc0_map_sg,
721         .unmap_sg = ps3_ioc0_unmap_sg,
722         .dma_supported = ps3_dma_supported,
723         .get_required_mask = ps3_dma_get_required_mask,
724         .map_page = ps3_ioc0_map_page,
725         .unmap_page = ps3_unmap_page,
726 };
727 
728 /**
729  * ps3_system_bus_release_device - remove a device from the system bus
730  */
731 
732 static void ps3_system_bus_release_device(struct device *_dev)
733 {
734         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
735         kfree(dev);
736 }
737 
738 /**
739  * ps3_system_bus_device_register - add a device to the system bus
740  *
741  * ps3_system_bus_device_register() expects the dev object to be allocated
742  * dynamically by the caller.  The system bus takes ownership of the dev
743  * object and frees the object in ps3_system_bus_release_device().
744  */
745 
746 int ps3_system_bus_device_register(struct ps3_system_bus_device *dev)
747 {
748         int result;
749         static unsigned int dev_ioc0_count;
750         static unsigned int dev_sb_count;
751         static unsigned int dev_vuart_count;
752         static unsigned int dev_lpm_count;
753 
754         if (!dev->core.parent)
755                 dev->core.parent = &ps3_system_bus;
756         dev->core.bus = &ps3_system_bus_type;
757         dev->core.release = ps3_system_bus_release_device;
758 
759         switch (dev->dev_type) {
760         case PS3_DEVICE_TYPE_IOC0:
761                 dev->core.dma_ops = &ps3_ioc0_dma_ops;
762                 dev_set_name(&dev->core, "ioc0_%02x", ++dev_ioc0_count);
763                 break;
764         case PS3_DEVICE_TYPE_SB:
765                 dev->core.dma_ops = &ps3_sb_dma_ops;
766                 dev_set_name(&dev->core, "sb_%02x", ++dev_sb_count);
767 
768                 break;
769         case PS3_DEVICE_TYPE_VUART:
770                 dev_set_name(&dev->core, "vuart_%02x", ++dev_vuart_count);
771                 break;
772         case PS3_DEVICE_TYPE_LPM:
773                 dev_set_name(&dev->core, "lpm_%02x", ++dev_lpm_count);
774                 break;
775         default:
776                 BUG();
777         };
778 
779         dev->core.of_node = NULL;
780         set_dev_node(&dev->core, 0);
781 
782         pr_debug("%s:%d add %s\n", __func__, __LINE__, dev_name(&dev->core));
783 
784         result = device_register(&dev->core);
785         return result;
786 }
787 
788 EXPORT_SYMBOL_GPL(ps3_system_bus_device_register);
789 
790 int ps3_system_bus_driver_register(struct ps3_system_bus_driver *drv)
791 {
792         int result;
793 
794         pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, drv->core.name);
795 
796         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
797                 return -ENODEV;
798 
799         drv->core.bus = &ps3_system_bus_type;
800 
801         result = driver_register(&drv->core);
802         pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, drv->core.name);
803         return result;
804 }
805 
806 EXPORT_SYMBOL_GPL(ps3_system_bus_driver_register);
807 
808 void ps3_system_bus_driver_unregister(struct ps3_system_bus_driver *drv)
809 {
810         pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, drv->core.name);
811         driver_unregister(&drv->core);
812         pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, drv->core.name);
813 }
814 
815 EXPORT_SYMBOL_GPL(ps3_system_bus_driver_unregister);
816 

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