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powerpc: Move iommu dma ops from dma.c to dma-iommu.c
[deliverable/linux.git] / arch / powerpc / platforms / ps3 / system-bus.c
CommitLineData
a3d4d643
GL		 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/module.h>
24#include <linux/dma-mapping.h>
25#include <linux/err.h>
26
27#include <asm/udbg.h>
a3d4d643 28#include <asm/lv1call.h>
e22ba7e3 29#include <asm/firmware.h>
a3d4d643 30
2a08ea69
GL		 31#include "platform.h"
32
6bb5cf10
GL		 33static struct device ps3_system_bus = {
34 .bus_id = "ps3_system",
35};
36
37/* FIXME: need device usage counters! */
38struct {
39 struct mutex mutex;
40 int sb_11; /* usb 0 */
41 int sb_12; /* usb 0 */
42 int gpu;
43} static usage_hack;
44
034e0ab5
GU		 45static int ps3_is_device(struct ps3_system_bus_device *dev, u64 bus_id,
46 u64 dev_id)
6bb5cf10
GL		 47{
48 return dev->bus_id == bus_id && dev->dev_id == dev_id;
49}
50
51static int ps3_open_hv_device_sb(struct ps3_system_bus_device *dev)
52{
53 int result;
54
55 BUG_ON(!dev->bus_id);
56 mutex_lock(&usage_hack.mutex);
57
58 if (ps3_is_device(dev, 1, 1)) {
59 usage_hack.sb_11++;
60 if (usage_hack.sb_11 > 1) {
61 result = 0;
62 goto done;
63 }
64 }
65
66 if (ps3_is_device(dev, 1, 2)) {
67 usage_hack.sb_12++;
68 if (usage_hack.sb_12 > 1) {
69 result = 0;
70 goto done;
71 }
72 }
73
74 result = lv1_open_device(dev->bus_id, dev->dev_id, 0);
75
76 if (result) {
77 pr_debug("%s:%d: lv1_open_device failed: %s\n", __func__,
78 __LINE__, ps3_result(result));
79 result = -EPERM;
80 }
81
82done:
83 mutex_unlock(&usage_hack.mutex);
84 return result;
85}
86
87static int ps3_close_hv_device_sb(struct ps3_system_bus_device *dev)
88{
89 int result;
90
91 BUG_ON(!dev->bus_id);
92 mutex_lock(&usage_hack.mutex);
93
94 if (ps3_is_device(dev, 1, 1)) {
95 usage_hack.sb_11--;
96 if (usage_hack.sb_11) {
97 result = 0;
98 goto done;
99 }
100 }
101
102 if (ps3_is_device(dev, 1, 2)) {
103 usage_hack.sb_12--;
104 if (usage_hack.sb_12) {
105 result = 0;
106 goto done;
107 }
108 }
109
110 result = lv1_close_device(dev->bus_id, dev->dev_id);
111 BUG_ON(result);
112
113done:
114 mutex_unlock(&usage_hack.mutex);
115 return result;
116}
117
118static int ps3_open_hv_device_gpu(struct ps3_system_bus_device *dev)
119{
120 int result;
121
122 mutex_lock(&usage_hack.mutex);
123
124 usage_hack.gpu++;
125 if (usage_hack.gpu > 1) {
126 result = 0;
127 goto done;
128 }
129
130 result = lv1_gpu_open(0);
131
132 if (result) {
133 pr_debug("%s:%d: lv1_gpu_open failed: %s\n", __func__,
134 __LINE__, ps3_result(result));
135 result = -EPERM;
136 }
137
138done:
139 mutex_unlock(&usage_hack.mutex);
140 return result;
141}
142
143static int ps3_close_hv_device_gpu(struct ps3_system_bus_device *dev)
144{
145 int result;
146
147 mutex_lock(&usage_hack.mutex);
148
149 usage_hack.gpu--;
150 if (usage_hack.gpu) {
151 result = 0;
152 goto done;
153 }
154
155 result = lv1_gpu_close();
156 BUG_ON(result);
157
158done:
159 mutex_unlock(&usage_hack.mutex);
160 return result;
161}
162
163int ps3_open_hv_device(struct ps3_system_bus_device *dev)
164{
165 BUG_ON(!dev);
166 pr_debug("%s:%d: match_id: %u\n", __func__, __LINE__, dev->match_id);
167
168 switch (dev->match_id) {
169 case PS3_MATCH_ID_EHCI:
170 case PS3_MATCH_ID_OHCI:
171 case PS3_MATCH_ID_GELIC:
172 case PS3_MATCH_ID_STOR_DISK:
173 case PS3_MATCH_ID_STOR_ROM:
174 case PS3_MATCH_ID_STOR_FLASH:
175 return ps3_open_hv_device_sb(dev);
176
177 case PS3_MATCH_ID_SOUND:
178 case PS3_MATCH_ID_GRAPHICS:
179 return ps3_open_hv_device_gpu(dev);
180
181 case PS3_MATCH_ID_AV_SETTINGS:
182 case PS3_MATCH_ID_SYSTEM_MANAGER:
183 pr_debug("%s:%d: unsupported match_id: %u\n", __func__,
184 __LINE__, dev->match_id);
034e0ab5
GU		 185 pr_debug("%s:%d: bus_id: %lu\n", __func__, __LINE__,
186 dev->bus_id);
6bb5cf10
GL		 187 BUG();
188 return -EINVAL;
189
190 default:
191 break;
192 }
193
194 pr_debug("%s:%d: unknown match_id: %u\n", __func__, __LINE__,
195 dev->match_id);
196 BUG();
197 return -ENODEV;
198}
199EXPORT_SYMBOL_GPL(ps3_open_hv_device);
200
201int ps3_close_hv_device(struct ps3_system_bus_device *dev)
202{
203 BUG_ON(!dev);
204 pr_debug("%s:%d: match_id: %u\n", __func__, __LINE__, dev->match_id);
205
206 switch (dev->match_id) {
207 case PS3_MATCH_ID_EHCI:
208 case PS3_MATCH_ID_OHCI:
209 case PS3_MATCH_ID_GELIC:
210 case PS3_MATCH_ID_STOR_DISK:
211 case PS3_MATCH_ID_STOR_ROM:
212 case PS3_MATCH_ID_STOR_FLASH:
213 return ps3_close_hv_device_sb(dev);
214
215 case PS3_MATCH_ID_SOUND:
216 case PS3_MATCH_ID_GRAPHICS:
217 return ps3_close_hv_device_gpu(dev);
218
219 case PS3_MATCH_ID_AV_SETTINGS:
220 case PS3_MATCH_ID_SYSTEM_MANAGER:
221 pr_debug("%s:%d: unsupported match_id: %u\n", __func__,
222 __LINE__, dev->match_id);
034e0ab5
GU		 223 pr_debug("%s:%d: bus_id: %lu\n", __func__, __LINE__,
224 dev->bus_id);
6bb5cf10
GL		 225 BUG();
226 return -EINVAL;
227
228 default:
229 break;
230 }
231
232 pr_debug("%s:%d: unknown match_id: %u\n", __func__, __LINE__,
233 dev->match_id);
234 BUG();
235 return -ENODEV;
236}
237EXPORT_SYMBOL_GPL(ps3_close_hv_device);
238
a3d4d643
GL		 239#define dump_mmio_region(_a) _dump_mmio_region(_a, __func__, __LINE__)
240static void _dump_mmio_region(const struct ps3_mmio_region* r,
241 const char* func, int line)
242{
034e0ab5 243 pr_debug("%s:%d: dev %lu:%lu\n", func, line, r->dev->bus_id,
6bb5cf10 244 r->dev->dev_id);
a3d4d643
GL		 245 pr_debug("%s:%d: bus_addr %lxh\n", func, line, r->bus_addr);
246 pr_debug("%s:%d: len %lxh\n", func, line, r->len);
247 pr_debug("%s:%d: lpar_addr %lxh\n", func, line, r->lpar_addr);
248}
249
6bb5cf10 250static int ps3_sb_mmio_region_create(struct ps3_mmio_region *r)
a3d4d643
GL		 251{
252 int result;
253
6bb5cf10 254 result = lv1_map_device_mmio_region(r->dev->bus_id, r->dev->dev_id,
a3d4d643
GL		 255 r->bus_addr, r->len, r->page_size, &r->lpar_addr);
256
257 if (result) {
258 pr_debug("%s:%d: lv1_map_device_mmio_region failed: %s\n",
259 __func__, __LINE__, ps3_result(result));
43d80439 260 r->lpar_addr = 0;
a3d4d643
GL		 261 }
262
263 dump_mmio_region(r);
264 return result;
265}
6bb5cf10
GL		 266
267static int ps3_ioc0_mmio_region_create(struct ps3_mmio_region *r)
268{
269 /* device specific; do nothing currently */
270 return 0;
271}
272
273int ps3_mmio_region_create(struct ps3_mmio_region *r)
274{
275 return r->mmio_ops->create(r);
276}
9288f5c3 277EXPORT_SYMBOL_GPL(ps3_mmio_region_create);
a3d4d643 278
6bb5cf10 279static int ps3_sb_free_mmio_region(struct ps3_mmio_region *r)
a3d4d643
GL		 280{
281 int result;
282
6bb5cf10
GL		 283 dump_mmio_region(r);
284;
285 result = lv1_unmap_device_mmio_region(r->dev->bus_id, r->dev->dev_id,
43d80439 286 r->lpar_addr);
a3d4d643
GL		 287
288 if (result)
289 pr_debug("%s:%d: lv1_unmap_device_mmio_region failed: %s\n",
290 __func__, __LINE__, ps3_result(result));
291
43d80439 292 r->lpar_addr = 0;
a3d4d643
GL		 293 return result;
294}
6bb5cf10
GL		 295
296static int ps3_ioc0_free_mmio_region(struct ps3_mmio_region *r)
297{
298 /* device specific; do nothing currently */
299 return 0;
300}
301
302
303int ps3_free_mmio_region(struct ps3_mmio_region *r)
304{
305 return r->mmio_ops->free(r);
306}
307
9288f5c3 308EXPORT_SYMBOL_GPL(ps3_free_mmio_region);
a3d4d643 309
6bb5cf10
GL		 310static const struct ps3_mmio_region_ops ps3_mmio_sb_region_ops = {
311 .create = ps3_sb_mmio_region_create,
312 .free = ps3_sb_free_mmio_region
313};
314
315static const struct ps3_mmio_region_ops ps3_mmio_ioc0_region_ops = {
316 .create = ps3_ioc0_mmio_region_create,
317 .free = ps3_ioc0_free_mmio_region
318};
319
320int ps3_mmio_region_init(struct ps3_system_bus_device *dev,
321 struct ps3_mmio_region *r, unsigned long bus_addr, unsigned long len,
322 enum ps3_mmio_page_size page_size)
323{
324 r->dev = dev;
325 r->bus_addr = bus_addr;
326 r->len = len;
327 r->page_size = page_size;
328 switch (dev->dev_type) {
329 case PS3_DEVICE_TYPE_SB:
330 r->mmio_ops = &ps3_mmio_sb_region_ops;
331 break;
332 case PS3_DEVICE_TYPE_IOC0:
333 r->mmio_ops = &ps3_mmio_ioc0_region_ops;
334 break;
335 default:
336 BUG();
337 return -EINVAL;
338 }
339 return 0;
340}
341EXPORT_SYMBOL_GPL(ps3_mmio_region_init);
342
a3d4d643
GL		 343static int ps3_system_bus_match(struct device *_dev,
344 struct device_driver *_drv)
345{
346 int result;
6bb5cf10
GL		 347 struct ps3_system_bus_driver *drv = ps3_drv_to_system_bus_drv(_drv);
348 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
a3d4d643 349
059e4938
MM		 350 if (!dev->match_sub_id)
351 result = dev->match_id == drv->match_id;
352 else
353 result = dev->match_sub_id == drv->match_sub_id &&
354 dev->match_id == drv->match_id;
a3d4d643 355
88b90c96 356 if (result)
059e4938
MM		 357 pr_info("%s:%d: dev=%u.%u(%s), drv=%u.%u(%s): match\n",
358 __func__, __LINE__,
359 dev->match_id, dev->match_sub_id, dev->core.bus_id,
360 drv->match_id, drv->match_sub_id, drv->core.name);
88b90c96 361 else
059e4938
MM		 362 pr_debug("%s:%d: dev=%u.%u(%s), drv=%u.%u(%s): miss\n",
363 __func__, __LINE__,
364 dev->match_id, dev->match_sub_id, dev->core.bus_id,
365 drv->match_id, drv->match_sub_id, drv->core.name);
366
a3d4d643
GL		 367 return result;
368}
369
370static int ps3_system_bus_probe(struct device *_dev)
371{
6bb5cf10
GL		 372 int result = 0;
373 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
374 struct ps3_system_bus_driver *drv;
a3d4d643 375
6bb5cf10 376 BUG_ON(!dev);
88b90c96 377 pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, _dev->bus_id);
a3d4d643 378
6bb5cf10 379 drv = ps3_system_bus_dev_to_system_bus_drv(dev);
a3d4d643
GL		 380 BUG_ON(!drv);
381
382 if (drv->probe)
383 result = drv->probe(dev);
384 else
88b90c96 385 pr_debug("%s:%d: %s no probe method\n", __func__, __LINE__,
a3d4d643
GL		 386 dev->core.bus_id);
387
88b90c96 388 pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, dev->core.bus_id);
a3d4d643
GL		 389 return result;
390}
391
392static int ps3_system_bus_remove(struct device *_dev)
393{
6bb5cf10
GL		 394 int result = 0;
395 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
396 struct ps3_system_bus_driver *drv;
397
398 BUG_ON(!dev);
88b90c96 399 pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, _dev->bus_id);
6bb5cf10
GL		 400
401 drv = ps3_system_bus_dev_to_system_bus_drv(dev);
402 BUG_ON(!drv);
a3d4d643
GL		 403
404 if (drv->remove)
6bb5cf10 405 result = drv->remove(dev);
a3d4d643 406 else
6bb5cf10
GL		 407 dev_dbg(&dev->core, "%s:%d %s: no remove method\n",
408 __func__, __LINE__, drv->core.name);
409
88b90c96 410 pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, dev->core.bus_id);
6bb5cf10
GL		 411 return result;
412}
a3d4d643 413
6bb5cf10
GL		 414static void ps3_system_bus_shutdown(struct device *_dev)
415{
416 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
417 struct ps3_system_bus_driver *drv;
a3d4d643 418
6bb5cf10
GL		 419 BUG_ON(!dev);
420
421 dev_dbg(&dev->core, " -> %s:%d: match_id %d\n", __func__, __LINE__,
422 dev->match_id);
423
424 if (!dev->core.driver) {
425 dev_dbg(&dev->core, "%s:%d: no driver bound\n", __func__,
426 __LINE__);
427 return;
428 }
429
430 drv = ps3_system_bus_dev_to_system_bus_drv(dev);
431
432 BUG_ON(!drv);
433
434 dev_dbg(&dev->core, "%s:%d: %s -> %s\n", __func__, __LINE__,
435 dev->core.bus_id, drv->core.name);
436
437 if (drv->shutdown)
438 drv->shutdown(dev);
439 else if (drv->remove) {
440 dev_dbg(&dev->core, "%s:%d %s: no shutdown, calling remove\n",
441 __func__, __LINE__, drv->core.name);
442 drv->remove(dev);
443 } else {
444 dev_dbg(&dev->core, "%s:%d %s: no shutdown method\n",
445 __func__, __LINE__, drv->core.name);
446 BUG();
447 }
448
449 dev_dbg(&dev->core, " <- %s:%d\n", __func__, __LINE__);
a3d4d643
GL		 450}
451
7eff2e7a 452static int ps3_system_bus_uevent(struct device *_dev, struct kobj_uevent_env *env)
688b3378
DW		 453{
454 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
688b3378 455
7eff2e7a 456 if (add_uevent_var(env, "MODALIAS=ps3:%d", dev->match_id))
688b3378 457 return -ENOMEM;
688b3378
DW		 458 return 0;
459}
460
6758555d
DW		 461static ssize_t modalias_show(struct device *_dev, struct device_attribute *a,
462 char *buf)
463{
464 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
465 int len = snprintf(buf, PAGE_SIZE, "ps3:%d\n", dev->match_id);
466
467 return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
468}
469
470static struct device_attribute ps3_system_bus_dev_attrs[] = {
471 __ATTR_RO(modalias),
472 __ATTR_NULL,
473};
474
a3d4d643 475struct bus_type ps3_system_bus_type = {
2a08ea69 476 .name = "ps3_system_bus",
a3d4d643 477 .match = ps3_system_bus_match,
688b3378 478 .uevent = ps3_system_bus_uevent,
a3d4d643
GL		 479 .probe = ps3_system_bus_probe,
480 .remove = ps3_system_bus_remove,
6bb5cf10 481 .shutdown = ps3_system_bus_shutdown,
6758555d 482 .dev_attrs = ps3_system_bus_dev_attrs,
a3d4d643
GL		 483};
484
6bb5cf10 485static int __init ps3_system_bus_init(void)
a3d4d643
GL		 486{
487 int result;
488
e22ba7e3 489 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
ef596c69 490 return -ENODEV;
e22ba7e3 491
6bb5cf10
GL		 492 pr_debug(" -> %s:%d\n", __func__, __LINE__);
493
494 mutex_init(&usage_hack.mutex);
495
496 result = device_register(&ps3_system_bus);
497 BUG_ON(result);
498
a3d4d643
GL		 499 result = bus_register(&ps3_system_bus_type);
500 BUG_ON(result);
6bb5cf10
GL		 501
502 pr_debug(" <- %s:%d\n", __func__, __LINE__);
a3d4d643
GL		 503 return result;
504}
505
506core_initcall(ps3_system_bus_init);
507
508/* Allocates a contiguous real buffer and creates mappings over it.
509 * Returns the virtual address of the buffer and sets dma_handle
510 * to the dma address (mapping) of the first page.
511 */
a3d4d643 512static void * ps3_alloc_coherent(struct device *_dev, size_t size,
6bb5cf10 513 dma_addr_t *dma_handle, gfp_t flag)
a3d4d643
GL		 514{
515 int result;
6bb5cf10 516 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
a3d4d643
GL		 517 unsigned long virt_addr;
518
a3d4d643
GL		 519 flag &= ~(__GFP_DMA | __GFP_HIGHMEM);
520 flag |= __GFP_ZERO;
521
522 virt_addr = __get_free_pages(flag, get_order(size));
523
524 if (!virt_addr) {
525 pr_debug("%s:%d: get_free_pages failed\n", __func__, __LINE__);
526 goto clean_none;
527 }
528
6bb5cf10
GL		 529 result = ps3_dma_map(dev->d_region, virt_addr, size, dma_handle,
530 IOPTE_PP_W | IOPTE_PP_R | IOPTE_SO_RW | IOPTE_M);
a3d4d643
GL		 531
532 if (result) {
533 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
534 __func__, __LINE__, result);
535 BUG_ON("check region type");
536 goto clean_alloc;
537 }
538
539 return (void*)virt_addr;
540
541clean_alloc:
542 free_pages(virt_addr, get_order(size));
543clean_none:
544 dma_handle = NULL;
545 return NULL;
546}
547
548static void ps3_free_coherent(struct device *_dev, size_t size, void *vaddr,
549 dma_addr_t dma_handle)
550{
6bb5cf10 551 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
a3d4d643
GL		 552
553 ps3_dma_unmap(dev->d_region, dma_handle, size);
554 free_pages((unsigned long)vaddr, get_order(size));
555}
556
557/* Creates TCEs for a user provided buffer. The user buffer must be
558 * contiguous real kernel storage (not vmalloc). The address of the buffer
559 * passed here is the kernel (virtual) address of the buffer. The buffer
560 * need not be page aligned, the dma_addr_t returned will point to the same
561 * byte within the page as vaddr.
562 */
563
6bb5cf10 564static dma_addr_t ps3_sb_map_single(struct device *_dev, void *ptr, size_t size,
3affedc4 565 enum dma_data_direction direction, struct dma_attrs *attrs)
a3d4d643 566{
6bb5cf10 567 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
a3d4d643
GL		 568 int result;
569 unsigned long bus_addr;
570
571 result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
6bb5cf10
GL		 572 &bus_addr,
573 IOPTE_PP_R | IOPTE_PP_W | IOPTE_SO_RW | IOPTE_M);
a3d4d643
GL		 574
575 if (result) {
576 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
577 __func__, __LINE__, result);
578 }
579
580 return bus_addr;
581}
582
6bb5cf10
GL		 583static dma_addr_t ps3_ioc0_map_single(struct device *_dev, void *ptr,
584 size_t size,
3affedc4
MN		 585 enum dma_data_direction direction,
586 struct dma_attrs *attrs)
6bb5cf10
GL		 587{
588 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
589 int result;
590 unsigned long bus_addr;
591 u64 iopte_flag;
592
593 iopte_flag = IOPTE_M;
594 switch (direction) {
595 case DMA_BIDIRECTIONAL:
596 iopte_flag |= IOPTE_PP_R | IOPTE_PP_W | IOPTE_SO_RW;
597 break;
598 case DMA_TO_DEVICE:
599 iopte_flag |= IOPTE_PP_R | IOPTE_SO_R;
600 break;
601 case DMA_FROM_DEVICE:
602 iopte_flag |= IOPTE_PP_W | 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
a3d4d643 618static void ps3_unmap_single(struct device *_dev, dma_addr_t dma_addr,
3affedc4 619 size_t size, enum dma_data_direction direction, struct dma_attrs *attrs)
a3d4d643 620{
6bb5cf10 621 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
a3d4d643
GL		 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
d1ed455e 632static int ps3_sb_map_sg(struct device *_dev, struct scatterlist *sgl,
3affedc4 633 int nents, enum dma_data_direction direction, struct dma_attrs *attrs)
a3d4d643
GL		 634{
635#if defined(CONFIG_PS3_DYNAMIC_DMA)
636 BUG_ON("do");
35063bb2
GL		 637 return -EPERM;
638#else
6bb5cf10 639 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
d1ed455e 640 struct scatterlist *sg;
435e0b2b
SR		 641 int i;
642
d1ed455e 643 for_each_sg(sgl, sg, nents, i) {
58b053e4
JA		 644 int result = ps3_dma_map(dev->d_region, sg_phys(sg),
645 sg->length, &sg->dma_address, 0);
35063bb2
GL		 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;
a3d4d643 657#endif
a3d4d643
GL		 658}
659
6bb5cf10
GL		 660static int ps3_ioc0_map_sg(struct device *_dev, struct scatterlist *sg,
661 int nents,
3affedc4
MN		 662 enum dma_data_direction direction,
663 struct dma_attrs *attrs)
6bb5cf10
GL		 664{
665 BUG();
666 return 0;
667}
668
669static void ps3_sb_unmap_sg(struct device *_dev, struct scatterlist *sg,
3affedc4 670 int nents, enum dma_data_direction direction, struct dma_attrs *attrs)
a3d4d643
GL		 671{
672#if defined(CONFIG_PS3_DYNAMIC_DMA)
673 BUG_ON("do");
674#endif
675}
676
6bb5cf10 677static void ps3_ioc0_unmap_sg(struct device *_dev, struct scatterlist *sg,
3affedc4
MN		 678 int nents, enum dma_data_direction direction,
679 struct dma_attrs *attrs)
6bb5cf10
GL		 680{
681 BUG();
682}
683
a3d4d643
GL		 684static int ps3_dma_supported(struct device *_dev, u64 mask)
685{
35063bb2 686 return mask >= DMA_32BIT_MASK;
a3d4d643
GL		 687}
688
6bb5cf10
GL		 689static struct dma_mapping_ops ps3_sb_dma_ops = {
690 .alloc_coherent = ps3_alloc_coherent,
691 .free_coherent = ps3_free_coherent,
692 .map_single = ps3_sb_map_single,
693 .unmap_single = ps3_unmap_single,
694 .map_sg = ps3_sb_map_sg,
695 .unmap_sg = ps3_sb_unmap_sg,
696 .dma_supported = ps3_dma_supported
697};
698
699static struct dma_mapping_ops ps3_ioc0_dma_ops = {
a3d4d643
GL		 700 .alloc_coherent = ps3_alloc_coherent,
701 .free_coherent = ps3_free_coherent,
6bb5cf10 702 .map_single = ps3_ioc0_map_single,
a3d4d643 703 .unmap_single = ps3_unmap_single,
6bb5cf10
GL		 704 .map_sg = ps3_ioc0_map_sg,
705 .unmap_sg = ps3_ioc0_unmap_sg,
a3d4d643
GL		 706 .dma_supported = ps3_dma_supported
707};
708
709/**
710 * ps3_system_bus_release_device - remove a device from the system bus
711 */
712
713static void ps3_system_bus_release_device(struct device *_dev)
714{
6bb5cf10 715 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
a3d4d643
GL		 716 kfree(dev);
717}
718
719/**
720 * ps3_system_bus_device_register - add a device to the system bus
721 *
722 * ps3_system_bus_device_register() expects the dev object to be allocated
723 * dynamically by the caller. The system bus takes ownership of the dev
724 * object and frees the object in ps3_system_bus_release_device().
725 */
726
727int ps3_system_bus_device_register(struct ps3_system_bus_device *dev)
728{
729 int result;
6bb5cf10
GL		 730 static unsigned int dev_ioc0_count;
731 static unsigned int dev_sb_count;
732 static unsigned int dev_vuart_count;
ed757002 733 static unsigned int dev_lpm_count;
a3d4d643 734
6bb5cf10
GL		 735 if (!dev->core.parent)
736 dev->core.parent = &ps3_system_bus;
a3d4d643
GL		 737 dev->core.bus = &ps3_system_bus_type;
738 dev->core.release = ps3_system_bus_release_device;
739
6bb5cf10
GL		 740 switch (dev->dev_type) {
741 case PS3_DEVICE_TYPE_IOC0:
742 dev->core.archdata.dma_ops = &ps3_ioc0_dma_ops;
743 snprintf(dev->core.bus_id, sizeof(dev->core.bus_id),
744 "ioc0_%02x", ++dev_ioc0_count);
745 break;
746 case PS3_DEVICE_TYPE_SB:
747 dev->core.archdata.dma_ops = &ps3_sb_dma_ops;
748 snprintf(dev->core.bus_id, sizeof(dev->core.bus_id),
749 "sb_%02x", ++dev_sb_count);
750
751 break;
752 case PS3_DEVICE_TYPE_VUART:
753 snprintf(dev->core.bus_id, sizeof(dev->core.bus_id),
754 "vuart_%02x", ++dev_vuart_count);
755 break;
ed757002
GL		 756 case PS3_DEVICE_TYPE_LPM:
757 snprintf(dev->core.bus_id, sizeof(dev->core.bus_id),
758 "lpm_%02x", ++dev_lpm_count);
759 break;
6bb5cf10
GL		 760 default:
761 BUG();
762 };
763
a3d4d643 764 dev->core.archdata.of_node = NULL;
a3d4d643
GL		 765 dev->core.archdata.numa_node = 0;
766
a3d4d643
GL		 767 pr_debug("%s:%d add %s\n", __func__, __LINE__, dev->core.bus_id);
768
769 result = device_register(&dev->core);
770 return result;
771}
772
773EXPORT_SYMBOL_GPL(ps3_system_bus_device_register);
774
775int ps3_system_bus_driver_register(struct ps3_system_bus_driver *drv)
776{
777 int result;
778
6bb5cf10
GL		 779 pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, drv->core.name);
780
781 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
782 return -ENODEV;
783
a3d4d643
GL		 784 drv->core.bus = &ps3_system_bus_type;
785
786 result = driver_register(&drv->core);
6bb5cf10 787 pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, drv->core.name);
a3d4d643
GL		 788 return result;
789}
790
791EXPORT_SYMBOL_GPL(ps3_system_bus_driver_register);
792
793void ps3_system_bus_driver_unregister(struct ps3_system_bus_driver *drv)
794{
6bb5cf10 795 pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, drv->core.name);
a3d4d643 796 driver_unregister(&drv->core);
6bb5cf10 797 pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, drv->core.name);
a3d4d643
GL		 798}
799
800EXPORT_SYMBOL_GPL(ps3_system_bus_driver_unregister);
Linux kernel - Deliverables
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