1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * PS3 system bus driver.
4 *
5 * Copyright (C) 2006 Sony Computer Entertainment Inc.
6 * Copyright 2006 Sony Corp.
7 */
8
9 #include <linux/kernel.h>
10 #include <linux/init.h>
11 #include <linux/export.h>
12 #include <linux/dma-map-ops.h>
13 #include <linux/err.h>
14 #include <linux/slab.h>
15
16 #include <asm/udbg.h>
17 #include <asm/lv1call.h>
18 #include <asm/firmware.h>
19 #include <asm/cell-regs.h>
20
21 #include "platform.h"
22
23 static struct device ps3_system_bus = {
24 .init_name = "ps3_system",
25 };
26
27 /* FIXME: need device usage counters! */
28 static struct {
29 struct mutex mutex;
30 int sb_11; /* usb 0 */
31 int sb_12; /* usb 0 */
32 int gpu;
33 } usage_hack;
34
ps3_is_device(struct ps3_system_bus_device * dev,u64 bus_id,u64 dev_id)35 static int ps3_is_device(struct ps3_system_bus_device *dev, u64 bus_id,
36 u64 dev_id)
37 {
38 return dev->bus_id == bus_id && dev->dev_id == dev_id;
39 }
40
ps3_open_hv_device_sb(struct ps3_system_bus_device * dev)41 static int ps3_open_hv_device_sb(struct ps3_system_bus_device *dev)
42 {
43 int result;
44
45 BUG_ON(!dev->bus_id);
46 mutex_lock(&usage_hack.mutex);
47
48 if (ps3_is_device(dev, 1, 1)) {
49 usage_hack.sb_11++;
50 if (usage_hack.sb_11 > 1) {
51 result = 0;
52 goto done;
53 }
54 }
55
56 if (ps3_is_device(dev, 1, 2)) {
57 usage_hack.sb_12++;
58 if (usage_hack.sb_12 > 1) {
59 result = 0;
60 goto done;
61 }
62 }
63
64 result = lv1_open_device(dev->bus_id, dev->dev_id, 0);
65
66 if (result) {
67 pr_debug("%s:%d: lv1_open_device failed: %s\n", __func__,
68 __LINE__, ps3_result(result));
69 result = -EPERM;
70 }
71
72 done:
73 mutex_unlock(&usage_hack.mutex);
74 return result;
75 }
76
ps3_close_hv_device_sb(struct ps3_system_bus_device * dev)77 static int ps3_close_hv_device_sb(struct ps3_system_bus_device *dev)
78 {
79 int result;
80
81 BUG_ON(!dev->bus_id);
82 mutex_lock(&usage_hack.mutex);
83
84 if (ps3_is_device(dev, 1, 1)) {
85 usage_hack.sb_11--;
86 if (usage_hack.sb_11) {
87 result = 0;
88 goto done;
89 }
90 }
91
92 if (ps3_is_device(dev, 1, 2)) {
93 usage_hack.sb_12--;
94 if (usage_hack.sb_12) {
95 result = 0;
96 goto done;
97 }
98 }
99
100 result = lv1_close_device(dev->bus_id, dev->dev_id);
101 BUG_ON(result);
102
103 done:
104 mutex_unlock(&usage_hack.mutex);
105 return result;
106 }
107
ps3_open_hv_device_gpu(struct ps3_system_bus_device * dev)108 static int ps3_open_hv_device_gpu(struct ps3_system_bus_device *dev)
109 {
110 int result;
111
112 mutex_lock(&usage_hack.mutex);
113
114 usage_hack.gpu++;
115 if (usage_hack.gpu > 1) {
116 result = 0;
117 goto done;
118 }
119
120 result = lv1_gpu_open(0);
121
122 if (result) {
123 pr_debug("%s:%d: lv1_gpu_open failed: %s\n", __func__,
124 __LINE__, ps3_result(result));
125 result = -EPERM;
126 }
127
128 done:
129 mutex_unlock(&usage_hack.mutex);
130 return result;
131 }
132
ps3_close_hv_device_gpu(struct ps3_system_bus_device * dev)133 static int ps3_close_hv_device_gpu(struct ps3_system_bus_device *dev)
134 {
135 int result;
136
137 mutex_lock(&usage_hack.mutex);
138
139 usage_hack.gpu--;
140 if (usage_hack.gpu) {
141 result = 0;
142 goto done;
143 }
144
145 result = lv1_gpu_close();
146 BUG_ON(result);
147
148 done:
149 mutex_unlock(&usage_hack.mutex);
150 return result;
151 }
152
ps3_open_hv_device(struct ps3_system_bus_device * dev)153 int ps3_open_hv_device(struct ps3_system_bus_device *dev)
154 {
155 BUG_ON(!dev);
156 pr_debug("%s:%d: match_id: %u\n", __func__, __LINE__, dev->match_id);
157
158 switch (dev->match_id) {
159 case PS3_MATCH_ID_EHCI:
160 case PS3_MATCH_ID_OHCI:
161 case PS3_MATCH_ID_GELIC:
162 case PS3_MATCH_ID_STOR_DISK:
163 case PS3_MATCH_ID_STOR_ROM:
164 case PS3_MATCH_ID_STOR_FLASH:
165 return ps3_open_hv_device_sb(dev);
166
167 case PS3_MATCH_ID_SOUND:
168 case PS3_MATCH_ID_GPU:
169 return ps3_open_hv_device_gpu(dev);
170
171 case PS3_MATCH_ID_AV_SETTINGS:
172 case PS3_MATCH_ID_SYSTEM_MANAGER:
173 pr_debug("%s:%d: unsupported match_id: %u\n", __func__,
174 __LINE__, dev->match_id);
175 pr_debug("%s:%d: bus_id: %llu\n", __func__, __LINE__,
176 dev->bus_id);
177 BUG();
178 return -EINVAL;
179
180 default:
181 break;
182 }
183
184 pr_debug("%s:%d: unknown match_id: %u\n", __func__, __LINE__,
185 dev->match_id);
186 BUG();
187 return -ENODEV;
188 }
189 EXPORT_SYMBOL_GPL(ps3_open_hv_device);
190
ps3_close_hv_device(struct ps3_system_bus_device * dev)191 int ps3_close_hv_device(struct ps3_system_bus_device *dev)
192 {
193 BUG_ON(!dev);
194 pr_debug("%s:%d: match_id: %u\n", __func__, __LINE__, dev->match_id);
195
196 switch (dev->match_id) {
197 case PS3_MATCH_ID_EHCI:
198 case PS3_MATCH_ID_OHCI:
199 case PS3_MATCH_ID_GELIC:
200 case PS3_MATCH_ID_STOR_DISK:
201 case PS3_MATCH_ID_STOR_ROM:
202 case PS3_MATCH_ID_STOR_FLASH:
203 return ps3_close_hv_device_sb(dev);
204
205 case PS3_MATCH_ID_SOUND:
206 case PS3_MATCH_ID_GPU:
207 return ps3_close_hv_device_gpu(dev);
208
209 case PS3_MATCH_ID_AV_SETTINGS:
210 case PS3_MATCH_ID_SYSTEM_MANAGER:
211 pr_debug("%s:%d: unsupported match_id: %u\n", __func__,
212 __LINE__, dev->match_id);
213 pr_debug("%s:%d: bus_id: %llu\n", __func__, __LINE__,
214 dev->bus_id);
215 BUG();
216 return -EINVAL;
217
218 default:
219 break;
220 }
221
222 pr_debug("%s:%d: unknown match_id: %u\n", __func__, __LINE__,
223 dev->match_id);
224 BUG();
225 return -ENODEV;
226 }
227 EXPORT_SYMBOL_GPL(ps3_close_hv_device);
228
229 #define dump_mmio_region(_a) _dump_mmio_region(_a, __func__, __LINE__)
_dump_mmio_region(const struct ps3_mmio_region * r,const char * func,int line)230 static void _dump_mmio_region(const struct ps3_mmio_region* r,
231 const char* func, int line)
232 {
233 pr_debug("%s:%d: dev %llu:%llu\n", func, line, r->dev->bus_id,
234 r->dev->dev_id);
235 pr_debug("%s:%d: bus_addr %lxh\n", func, line, r->bus_addr);
236 pr_debug("%s:%d: len %lxh\n", func, line, r->len);
237 pr_debug("%s:%d: lpar_addr %lxh\n", func, line, r->lpar_addr);
238 }
239
ps3_sb_mmio_region_create(struct ps3_mmio_region * r)240 static int ps3_sb_mmio_region_create(struct ps3_mmio_region *r)
241 {
242 int result;
243 u64 lpar_addr;
244
245 result = lv1_map_device_mmio_region(r->dev->bus_id, r->dev->dev_id,
246 r->bus_addr, r->len, r->page_size, &lpar_addr);
247 r->lpar_addr = lpar_addr;
248
249 if (result) {
250 pr_debug("%s:%d: lv1_map_device_mmio_region failed: %s\n",
251 __func__, __LINE__, ps3_result(result));
252 r->lpar_addr = 0;
253 }
254
255 dump_mmio_region(r);
256 return result;
257 }
258
ps3_ioc0_mmio_region_create(struct ps3_mmio_region * r)259 static int ps3_ioc0_mmio_region_create(struct ps3_mmio_region *r)
260 {
261 /* device specific; do nothing currently */
262 return 0;
263 }
264
ps3_mmio_region_create(struct ps3_mmio_region * r)265 int ps3_mmio_region_create(struct ps3_mmio_region *r)
266 {
267 return r->mmio_ops->create(r);
268 }
269 EXPORT_SYMBOL_GPL(ps3_mmio_region_create);
270
ps3_sb_free_mmio_region(struct ps3_mmio_region * r)271 static int ps3_sb_free_mmio_region(struct ps3_mmio_region *r)
272 {
273 int result;
274
275 dump_mmio_region(r);
276 result = lv1_unmap_device_mmio_region(r->dev->bus_id, r->dev->dev_id,
277 r->lpar_addr);
278
279 if (result)
280 pr_debug("%s:%d: lv1_unmap_device_mmio_region failed: %s\n",
281 __func__, __LINE__, ps3_result(result));
282
283 r->lpar_addr = 0;
284 return result;
285 }
286
ps3_ioc0_free_mmio_region(struct ps3_mmio_region * r)287 static int ps3_ioc0_free_mmio_region(struct ps3_mmio_region *r)
288 {
289 /* device specific; do nothing currently */
290 return 0;
291 }
292
293
ps3_free_mmio_region(struct ps3_mmio_region * r)294 int ps3_free_mmio_region(struct ps3_mmio_region *r)
295 {
296 return r->mmio_ops->free(r);
297 }
298
299 EXPORT_SYMBOL_GPL(ps3_free_mmio_region);
300
301 static const struct ps3_mmio_region_ops ps3_mmio_sb_region_ops = {
302 .create = ps3_sb_mmio_region_create,
303 .free = ps3_sb_free_mmio_region
304 };
305
306 static const struct ps3_mmio_region_ops ps3_mmio_ioc0_region_ops = {
307 .create = ps3_ioc0_mmio_region_create,
308 .free = ps3_ioc0_free_mmio_region
309 };
310
ps3_mmio_region_init(struct ps3_system_bus_device * dev,struct ps3_mmio_region * r,unsigned long bus_addr,unsigned long len,enum ps3_mmio_page_size page_size)311 int ps3_mmio_region_init(struct ps3_system_bus_device *dev,
312 struct ps3_mmio_region *r, unsigned long bus_addr, unsigned long len,
313 enum ps3_mmio_page_size page_size)
314 {
315 r->dev = dev;
316 r->bus_addr = bus_addr;
317 r->len = len;
318 r->page_size = page_size;
319 switch (dev->dev_type) {
320 case PS3_DEVICE_TYPE_SB:
321 r->mmio_ops = &ps3_mmio_sb_region_ops;
322 break;
323 case PS3_DEVICE_TYPE_IOC0:
324 r->mmio_ops = &ps3_mmio_ioc0_region_ops;
325 break;
326 default:
327 BUG();
328 return -EINVAL;
329 }
330 return 0;
331 }
332 EXPORT_SYMBOL_GPL(ps3_mmio_region_init);
333
ps3_system_bus_match(struct device * _dev,struct device_driver * _drv)334 static int ps3_system_bus_match(struct device *_dev,
335 struct device_driver *_drv)
336 {
337 int result;
338 struct ps3_system_bus_driver *drv = ps3_drv_to_system_bus_drv(_drv);
339 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
340
341 if (!dev->match_sub_id)
342 result = dev->match_id == drv->match_id;
343 else
344 result = dev->match_sub_id == drv->match_sub_id &&
345 dev->match_id == drv->match_id;
346
347 if (result)
348 pr_info("%s:%d: dev=%u.%u(%s), drv=%u.%u(%s): match\n",
349 __func__, __LINE__,
350 dev->match_id, dev->match_sub_id, dev_name(&dev->core),
351 drv->match_id, drv->match_sub_id, drv->core.name);
352 else
353 pr_debug("%s:%d: dev=%u.%u(%s), drv=%u.%u(%s): miss\n",
354 __func__, __LINE__,
355 dev->match_id, dev->match_sub_id, dev_name(&dev->core),
356 drv->match_id, drv->match_sub_id, drv->core.name);
357
358 return result;
359 }
360
ps3_system_bus_probe(struct device * _dev)361 static int ps3_system_bus_probe(struct device *_dev)
362 {
363 int result = 0;
364 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
365 struct ps3_system_bus_driver *drv;
366
367 BUG_ON(!dev);
368 dev_dbg(_dev, "%s:%d\n", __func__, __LINE__);
369
370 drv = ps3_system_bus_dev_to_system_bus_drv(dev);
371 BUG_ON(!drv);
372
373 if (drv->probe)
374 result = drv->probe(dev);
375 else
376 pr_debug("%s:%d: %s no probe method\n", __func__, __LINE__,
377 dev_name(&dev->core));
378
379 pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, dev_name(&dev->core));
380 return result;
381 }
382
ps3_system_bus_remove(struct device * _dev)383 static int ps3_system_bus_remove(struct device *_dev)
384 {
385 int result = 0;
386 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
387 struct ps3_system_bus_driver *drv;
388
389 BUG_ON(!dev);
390 dev_dbg(_dev, "%s:%d\n", __func__, __LINE__);
391
392 drv = ps3_system_bus_dev_to_system_bus_drv(dev);
393 BUG_ON(!drv);
394
395 if (drv->remove)
396 result = drv->remove(dev);
397 else
398 dev_dbg(&dev->core, "%s:%d %s: no remove method\n",
399 __func__, __LINE__, drv->core.name);
400
401 pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, dev_name(&dev->core));
402 return result;
403 }
404
ps3_system_bus_shutdown(struct device * _dev)405 static void ps3_system_bus_shutdown(struct device *_dev)
406 {
407 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
408 struct ps3_system_bus_driver *drv;
409
410 BUG_ON(!dev);
411
412 dev_dbg(&dev->core, " -> %s:%d: match_id %d\n", __func__, __LINE__,
413 dev->match_id);
414
415 if (!dev->core.driver) {
416 dev_dbg(&dev->core, "%s:%d: no driver bound\n", __func__,
417 __LINE__);
418 return;
419 }
420
421 drv = ps3_system_bus_dev_to_system_bus_drv(dev);
422
423 BUG_ON(!drv);
424
425 dev_dbg(&dev->core, "%s:%d: %s -> %s\n", __func__, __LINE__,
426 dev_name(&dev->core), drv->core.name);
427
428 if (drv->shutdown)
429 drv->shutdown(dev);
430 else if (drv->remove) {
431 dev_dbg(&dev->core, "%s:%d %s: no shutdown, calling remove\n",
432 __func__, __LINE__, drv->core.name);
433 drv->remove(dev);
434 } else {
435 dev_dbg(&dev->core, "%s:%d %s: no shutdown method\n",
436 __func__, __LINE__, drv->core.name);
437 BUG();
438 }
439
440 dev_dbg(&dev->core, " <- %s:%d\n", __func__, __LINE__);
441 }
442
ps3_system_bus_uevent(struct device * _dev,struct kobj_uevent_env * env)443 static int ps3_system_bus_uevent(struct device *_dev, struct kobj_uevent_env *env)
444 {
445 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
446
447 if (add_uevent_var(env, "MODALIAS=ps3:%d:%d", dev->match_id,
448 dev->match_sub_id))
449 return -ENOMEM;
450 return 0;
451 }
452
modalias_show(struct device * _dev,struct device_attribute * a,char * buf)453 static ssize_t modalias_show(struct device *_dev, struct device_attribute *a,
454 char *buf)
455 {
456 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
457 int len = snprintf(buf, PAGE_SIZE, "ps3:%d:%d\n", dev->match_id,
458 dev->match_sub_id);
459
460 return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
461 }
462 static DEVICE_ATTR_RO(modalias);
463
464 static struct attribute *ps3_system_bus_dev_attrs[] = {
465 &dev_attr_modalias.attr,
466 NULL,
467 };
468 ATTRIBUTE_GROUPS(ps3_system_bus_dev);
469
470 struct bus_type ps3_system_bus_type = {
471 .name = "ps3_system_bus",
472 .match = ps3_system_bus_match,
473 .uevent = ps3_system_bus_uevent,
474 .probe = ps3_system_bus_probe,
475 .remove = ps3_system_bus_remove,
476 .shutdown = ps3_system_bus_shutdown,
477 .dev_groups = ps3_system_bus_dev_groups,
478 };
479
ps3_system_bus_init(void)480 static int __init ps3_system_bus_init(void)
481 {
482 int result;
483
484 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
485 return -ENODEV;
486
487 pr_debug(" -> %s:%d\n", __func__, __LINE__);
488
489 mutex_init(&usage_hack.mutex);
490
491 result = device_register(&ps3_system_bus);
492 BUG_ON(result);
493
494 result = bus_register(&ps3_system_bus_type);
495 BUG_ON(result);
496
497 pr_debug(" <- %s:%d\n", __func__, __LINE__);
498 return result;
499 }
500
501 core_initcall(ps3_system_bus_init);
502
503 /* Allocates a contiguous real buffer and creates mappings over it.
504 * Returns the virtual address of the buffer and sets dma_handle
505 * to the dma address (mapping) of the first page.
506 */
ps3_alloc_coherent(struct device * _dev,size_t size,dma_addr_t * dma_handle,gfp_t flag,unsigned long attrs)507 static void * ps3_alloc_coherent(struct device *_dev, size_t size,
508 dma_addr_t *dma_handle, gfp_t flag,
509 unsigned long attrs)
510 {
511 int result;
512 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
513 unsigned long virt_addr;
514
515 flag &= ~(__GFP_DMA | __GFP_HIGHMEM);
516 flag |= __GFP_ZERO;
517
518 virt_addr = __get_free_pages(flag, get_order(size));
519
520 if (!virt_addr) {
521 pr_debug("%s:%d: get_free_pages failed\n", __func__, __LINE__);
522 goto clean_none;
523 }
524
525 result = ps3_dma_map(dev->d_region, virt_addr, size, dma_handle,
526 CBE_IOPTE_PP_W | CBE_IOPTE_PP_R |
527 CBE_IOPTE_SO_RW | CBE_IOPTE_M);
528
529 if (result) {
530 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
531 __func__, __LINE__, result);
532 BUG_ON("check region type");
533 goto clean_alloc;
534 }
535
536 return (void*)virt_addr;
537
538 clean_alloc:
539 free_pages(virt_addr, get_order(size));
540 clean_none:
541 dma_handle = NULL;
542 return NULL;
543 }
544
ps3_free_coherent(struct device * _dev,size_t size,void * vaddr,dma_addr_t dma_handle,unsigned long attrs)545 static void ps3_free_coherent(struct device *_dev, size_t size, void *vaddr,
546 dma_addr_t dma_handle, unsigned long attrs)
547 {
548 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
549
550 ps3_dma_unmap(dev->d_region, dma_handle, size);
551 free_pages((unsigned long)vaddr, get_order(size));
552 }
553
554 /* Creates TCEs for a user provided buffer. The user buffer must be
555 * contiguous real kernel storage (not vmalloc). The address passed here
556 * comprises a page address and offset into that page. The dma_addr_t
557 * returned will point to the same byte within the page as was passed in.
558 */
559
ps3_sb_map_page(struct device * _dev,struct page * page,unsigned long offset,size_t size,enum dma_data_direction direction,unsigned long attrs)560 static dma_addr_t ps3_sb_map_page(struct device *_dev, struct page *page,
561 unsigned long offset, size_t size, enum dma_data_direction direction,
562 unsigned long attrs)
563 {
564 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
565 int result;
566 dma_addr_t bus_addr;
567 void *ptr = page_address(page) + offset;
568
569 result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
570 &bus_addr,
571 CBE_IOPTE_PP_R | CBE_IOPTE_PP_W |
572 CBE_IOPTE_SO_RW | CBE_IOPTE_M);
573
574 if (result) {
575 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
576 __func__, __LINE__, result);
577 }
578
579 return bus_addr;
580 }
581
ps3_ioc0_map_page(struct device * _dev,struct page * page,unsigned long offset,size_t size,enum dma_data_direction direction,unsigned long attrs)582 static dma_addr_t ps3_ioc0_map_page(struct device *_dev, struct page *page,
583 unsigned long offset, size_t size,
584 enum dma_data_direction direction,
585 unsigned long attrs)
586 {
587 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
588 int result;
589 dma_addr_t bus_addr;
590 u64 iopte_flag;
591 void *ptr = page_address(page) + offset;
592
593 iopte_flag = CBE_IOPTE_M;
594 switch (direction) {
595 case DMA_BIDIRECTIONAL:
596 iopte_flag |= CBE_IOPTE_PP_R | CBE_IOPTE_PP_W | CBE_IOPTE_SO_RW;
597 break;
598 case DMA_TO_DEVICE:
599 iopte_flag |= CBE_IOPTE_PP_R | CBE_IOPTE_SO_R;
600 break;
601 case DMA_FROM_DEVICE:
602 iopte_flag |= CBE_IOPTE_PP_W | CBE_IOPTE_SO_RW;
603 break;
604 default:
605 /* not happned */
606 BUG();
607 };
608 result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
609 &bus_addr, iopte_flag);
610
611 if (result) {
612 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
613 __func__, __LINE__, result);
614 }
615 return bus_addr;
616 }
617
ps3_unmap_page(struct device * _dev,dma_addr_t dma_addr,size_t size,enum dma_data_direction direction,unsigned long attrs)618 static void ps3_unmap_page(struct device *_dev, dma_addr_t dma_addr,
619 size_t size, enum dma_data_direction direction, unsigned long attrs)
620 {
621 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
622 int result;
623
624 result = ps3_dma_unmap(dev->d_region, dma_addr, size);
625
626 if (result) {
627 pr_debug("%s:%d: ps3_dma_unmap failed (%d)\n",
628 __func__, __LINE__, result);
629 }
630 }
631
ps3_sb_map_sg(struct device * _dev,struct scatterlist * sgl,int nents,enum dma_data_direction direction,unsigned long attrs)632 static int ps3_sb_map_sg(struct device *_dev, struct scatterlist *sgl,
633 int nents, enum dma_data_direction direction, unsigned long attrs)
634 {
635 #if defined(CONFIG_PS3_DYNAMIC_DMA)
636 BUG_ON("do");
637 return -EPERM;
638 #else
639 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
640 struct scatterlist *sg;
641 int i;
642
643 for_each_sg(sgl, sg, nents, i) {
644 int result = ps3_dma_map(dev->d_region, sg_phys(sg),
645 sg->length, &sg->dma_address, 0);
646
647 if (result) {
648 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
649 __func__, __LINE__, result);
650 return -EINVAL;
651 }
652
653 sg->dma_length = sg->length;
654 }
655
656 return nents;
657 #endif
658 }
659
ps3_ioc0_map_sg(struct device * _dev,struct scatterlist * sg,int nents,enum dma_data_direction direction,unsigned long attrs)660 static int ps3_ioc0_map_sg(struct device *_dev, struct scatterlist *sg,
661 int nents,
662 enum dma_data_direction direction,
663 unsigned long attrs)
664 {
665 BUG();
666 return 0;
667 }
668
ps3_sb_unmap_sg(struct device * _dev,struct scatterlist * sg,int nents,enum dma_data_direction direction,unsigned long attrs)669 static void ps3_sb_unmap_sg(struct device *_dev, struct scatterlist *sg,
670 int nents, enum dma_data_direction direction, unsigned long attrs)
671 {
672 #if defined(CONFIG_PS3_DYNAMIC_DMA)
673 BUG_ON("do");
674 #endif
675 }
676
ps3_ioc0_unmap_sg(struct device * _dev,struct scatterlist * sg,int nents,enum dma_data_direction direction,unsigned long attrs)677 static void ps3_ioc0_unmap_sg(struct device *_dev, struct scatterlist *sg,
678 int nents, enum dma_data_direction direction,
679 unsigned long attrs)
680 {
681 BUG();
682 }
683
ps3_dma_supported(struct device * _dev,u64 mask)684 static int ps3_dma_supported(struct device *_dev, u64 mask)
685 {
686 return mask >= DMA_BIT_MASK(32);
687 }
688
689 static const struct dma_map_ops ps3_sb_dma_ops = {
690 .alloc = ps3_alloc_coherent,
691 .free = ps3_free_coherent,
692 .map_sg = ps3_sb_map_sg,
693 .unmap_sg = ps3_sb_unmap_sg,
694 .dma_supported = ps3_dma_supported,
695 .map_page = ps3_sb_map_page,
696 .unmap_page = ps3_unmap_page,
697 .mmap = dma_common_mmap,
698 .get_sgtable = dma_common_get_sgtable,
699 .alloc_pages = dma_common_alloc_pages,
700 .free_pages = dma_common_free_pages,
701 };
702
703 static const struct dma_map_ops ps3_ioc0_dma_ops = {
704 .alloc = ps3_alloc_coherent,
705 .free = ps3_free_coherent,
706 .map_sg = ps3_ioc0_map_sg,
707 .unmap_sg = ps3_ioc0_unmap_sg,
708 .dma_supported = ps3_dma_supported,
709 .map_page = ps3_ioc0_map_page,
710 .unmap_page = ps3_unmap_page,
711 .mmap = dma_common_mmap,
712 .get_sgtable = dma_common_get_sgtable,
713 .alloc_pages = dma_common_alloc_pages,
714 .free_pages = dma_common_free_pages,
715 };
716
717 /**
718 * ps3_system_bus_release_device - remove a device from the system bus
719 */
720
ps3_system_bus_release_device(struct device * _dev)721 static void ps3_system_bus_release_device(struct device *_dev)
722 {
723 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
724 kfree(dev);
725 }
726
727 /**
728 * ps3_system_bus_device_register - add a device to the system bus
729 *
730 * ps3_system_bus_device_register() expects the dev object to be allocated
731 * dynamically by the caller. The system bus takes ownership of the dev
732 * object and frees the object in ps3_system_bus_release_device().
733 */
734
ps3_system_bus_device_register(struct ps3_system_bus_device * dev)735 int ps3_system_bus_device_register(struct ps3_system_bus_device *dev)
736 {
737 int result;
738 static unsigned int dev_ioc0_count;
739 static unsigned int dev_sb_count;
740 static unsigned int dev_vuart_count;
741 static unsigned int dev_lpm_count;
742
743 if (!dev->core.parent)
744 dev->core.parent = &ps3_system_bus;
745 dev->core.bus = &ps3_system_bus_type;
746 dev->core.release = ps3_system_bus_release_device;
747
748 switch (dev->dev_type) {
749 case PS3_DEVICE_TYPE_IOC0:
750 dev->core.dma_ops = &ps3_ioc0_dma_ops;
751 dev_set_name(&dev->core, "ioc0_%02x", ++dev_ioc0_count);
752 break;
753 case PS3_DEVICE_TYPE_SB:
754 dev->core.dma_ops = &ps3_sb_dma_ops;
755 dev_set_name(&dev->core, "sb_%02x", ++dev_sb_count);
756
757 break;
758 case PS3_DEVICE_TYPE_VUART:
759 dev_set_name(&dev->core, "vuart_%02x", ++dev_vuart_count);
760 break;
761 case PS3_DEVICE_TYPE_LPM:
762 dev_set_name(&dev->core, "lpm_%02x", ++dev_lpm_count);
763 break;
764 default:
765 BUG();
766 };
767
768 dev->core.of_node = NULL;
769 set_dev_node(&dev->core, 0);
770
771 pr_debug("%s:%d add %s\n", __func__, __LINE__, dev_name(&dev->core));
772
773 result = device_register(&dev->core);
774 return result;
775 }
776
777 EXPORT_SYMBOL_GPL(ps3_system_bus_device_register);
778
ps3_system_bus_driver_register(struct ps3_system_bus_driver * drv)779 int ps3_system_bus_driver_register(struct ps3_system_bus_driver *drv)
780 {
781 int result;
782
783 pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, drv->core.name);
784
785 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
786 return -ENODEV;
787
788 drv->core.bus = &ps3_system_bus_type;
789
790 result = driver_register(&drv->core);
791 pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, drv->core.name);
792 return result;
793 }
794
795 EXPORT_SYMBOL_GPL(ps3_system_bus_driver_register);
796
ps3_system_bus_driver_unregister(struct ps3_system_bus_driver * drv)797 void ps3_system_bus_driver_unregister(struct ps3_system_bus_driver *drv)
798 {
799 pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, drv->core.name);
800 driver_unregister(&drv->core);
801 pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, drv->core.name);
802 }
803
804 EXPORT_SYMBOL_GPL(ps3_system_bus_driver_unregister);
805
