blob: 7fad7af87eb205dbf82805336d73fc37d797cfcb [file] [log] [blame]
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +00001/*
2 * ps3vram - Use extra PS3 video ram as MTD block device.
3 *
4 * Copyright 2009 Sony Corporation
5 *
6 * Based on the MTD ps3vram driver, which is
7 * Copyright (c) 2007-2008 Jim Paris <jim@jtan.com>
8 * Added support RSX DMA Vivien Chappelier <vivien.chappelier@free.fr>
9 */
10
11#include <linux/blkdev.h>
12#include <linux/delay.h>
13#include <linux/proc_fs.h>
14#include <linux/seq_file.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090015#include <linux/slab.h>
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +000016
Geert Uytterhoeven9413c882009-07-29 02:06:42 +000017#include <asm/cell-regs.h>
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +000018#include <asm/firmware.h>
19#include <asm/lv1call.h>
20#include <asm/ps3.h>
Geert Uytterhoevend3352c92009-06-10 04:38:48 +000021#include <asm/ps3gpu.h>
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +000022
23
24#define DEVICE_NAME "ps3vram"
25
26
27#define XDR_BUF_SIZE (2 * 1024 * 1024) /* XDR buffer (must be 1MiB aligned) */
28#define XDR_IOIF 0x0c000000
29
30#define FIFO_BASE XDR_IOIF
31#define FIFO_SIZE (64 * 1024)
32
33#define DMA_PAGE_SIZE (4 * 1024)
34
35#define CACHE_PAGE_SIZE (256 * 1024)
36#define CACHE_PAGE_COUNT ((XDR_BUF_SIZE - FIFO_SIZE) / CACHE_PAGE_SIZE)
37
38#define CACHE_OFFSET CACHE_PAGE_SIZE
39#define FIFO_OFFSET 0
40
41#define CTRL_PUT 0x10
42#define CTRL_GET 0x11
43#define CTRL_TOP 0x15
44
45#define UPLOAD_SUBCH 1
46#define DOWNLOAD_SUBCH 2
47
48#define NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN 0x0000030c
49#define NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY 0x00000104
50
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +000051#define CACHE_PAGE_PRESENT 1
52#define CACHE_PAGE_DIRTY 2
53
54struct ps3vram_tag {
55 unsigned int address;
56 unsigned int flags;
57};
58
59struct ps3vram_cache {
60 unsigned int page_count;
61 unsigned int page_size;
62 struct ps3vram_tag *tags;
63 unsigned int hit;
64 unsigned int miss;
65};
66
67struct ps3vram_priv {
68 struct request_queue *queue;
69 struct gendisk *gendisk;
70
71 u64 size;
72
73 u64 memory_handle;
74 u64 context_handle;
75 u32 *ctrl;
Geert Uytterhoeven1bd97842009-06-10 04:38:51 +000076 void *reports;
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +000077 u8 *xdr_buf;
78
79 u32 *fifo_base;
80 u32 *fifo_ptr;
81
82 struct ps3vram_cache cache;
83
Geert Uytterhoevenfb89e892009-06-10 04:38:41 +000084 spinlock_t lock; /* protecting list of bios */
85 struct bio_list list;
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +000086};
87
88
89static int ps3vram_major;
90
91
Alexey Dobriyan83d5cde2009-09-21 17:01:13 -070092static const struct block_device_operations ps3vram_fops = {
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +000093 .owner = THIS_MODULE,
94};
95
96
97#define DMA_NOTIFIER_HANDLE_BASE 0x66604200 /* first DMA notifier handle */
98#define DMA_NOTIFIER_OFFSET_BASE 0x1000 /* first DMA notifier offset */
99#define DMA_NOTIFIER_SIZE 0x40
100#define NOTIFIER 7 /* notifier used for completion report */
101
102static char *size = "256M";
103module_param(size, charp, 0);
104MODULE_PARM_DESC(size, "memory size");
105
Geert Uytterhoeven1bd97842009-06-10 04:38:51 +0000106static u32 *ps3vram_get_notifier(void *reports, int notifier)
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000107{
Geert Uytterhoeven1bd97842009-06-10 04:38:51 +0000108 return reports + DMA_NOTIFIER_OFFSET_BASE +
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000109 DMA_NOTIFIER_SIZE * notifier;
110}
111
112static void ps3vram_notifier_reset(struct ps3_system_bus_device *dev)
113{
Geert Uytterhoeven03fa68c2009-06-10 04:38:54 +0000114 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000115 u32 *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
116 int i;
117
118 for (i = 0; i < 4; i++)
119 notify[i] = 0xffffffff;
120}
121
122static int ps3vram_notifier_wait(struct ps3_system_bus_device *dev,
123 unsigned int timeout_ms)
124{
Geert Uytterhoeven03fa68c2009-06-10 04:38:54 +0000125 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000126 u32 *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
Hideyuki Sasakif21121c2009-11-04 09:09:28 +0100127 unsigned long timeout;
128
129 for (timeout = 20; timeout; timeout--) {
130 if (!notify[3])
131 return 0;
132 udelay(10);
133 }
134
135 timeout = jiffies + msecs_to_jiffies(timeout_ms);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000136
137 do {
138 if (!notify[3])
139 return 0;
140 msleep(1);
141 } while (time_before(jiffies, timeout));
142
143 return -ETIMEDOUT;
144}
145
146static void ps3vram_init_ring(struct ps3_system_bus_device *dev)
147{
Geert Uytterhoeven03fa68c2009-06-10 04:38:54 +0000148 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000149
150 priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET;
151 priv->ctrl[CTRL_GET] = FIFO_BASE + FIFO_OFFSET;
152}
153
154static int ps3vram_wait_ring(struct ps3_system_bus_device *dev,
155 unsigned int timeout_ms)
156{
Geert Uytterhoeven03fa68c2009-06-10 04:38:54 +0000157 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000158 unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
159
160 do {
161 if (priv->ctrl[CTRL_PUT] == priv->ctrl[CTRL_GET])
162 return 0;
163 msleep(1);
164 } while (time_before(jiffies, timeout));
165
166 dev_warn(&dev->core, "FIFO timeout (%08x/%08x/%08x)\n",
167 priv->ctrl[CTRL_PUT], priv->ctrl[CTRL_GET],
168 priv->ctrl[CTRL_TOP]);
169
170 return -ETIMEDOUT;
171}
172
173static void ps3vram_out_ring(struct ps3vram_priv *priv, u32 data)
174{
175 *(priv->fifo_ptr)++ = data;
176}
177
178static void ps3vram_begin_ring(struct ps3vram_priv *priv, u32 chan, u32 tag,
179 u32 size)
180{
181 ps3vram_out_ring(priv, (size << 18) | (chan << 13) | tag);
182}
183
184static void ps3vram_rewind_ring(struct ps3_system_bus_device *dev)
185{
Geert Uytterhoeven03fa68c2009-06-10 04:38:54 +0000186 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000187 int status;
188
189 ps3vram_out_ring(priv, 0x20000000 | (FIFO_BASE + FIFO_OFFSET));
190
191 priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET;
192
193 /* asking the HV for a blit will kick the FIFO */
Geert Uytterhoevend3352c92009-06-10 04:38:48 +0000194 status = lv1_gpu_fb_blit(priv->context_handle, 0, 0, 0, 0);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000195 if (status)
Geert Uytterhoevend3352c92009-06-10 04:38:48 +0000196 dev_err(&dev->core, "%s: lv1_gpu_fb_blit failed %d\n",
197 __func__, status);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000198
199 priv->fifo_ptr = priv->fifo_base;
200}
201
202static void ps3vram_fire_ring(struct ps3_system_bus_device *dev)
203{
Geert Uytterhoeven03fa68c2009-06-10 04:38:54 +0000204 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000205 int status;
206
207 mutex_lock(&ps3_gpu_mutex);
208
209 priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET +
210 (priv->fifo_ptr - priv->fifo_base) * sizeof(u32);
211
212 /* asking the HV for a blit will kick the FIFO */
Geert Uytterhoevend3352c92009-06-10 04:38:48 +0000213 status = lv1_gpu_fb_blit(priv->context_handle, 0, 0, 0, 0);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000214 if (status)
Geert Uytterhoevend3352c92009-06-10 04:38:48 +0000215 dev_err(&dev->core, "%s: lv1_gpu_fb_blit failed %d\n",
216 __func__, status);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000217
218 if ((priv->fifo_ptr - priv->fifo_base) * sizeof(u32) >
219 FIFO_SIZE - 1024) {
220 dev_dbg(&dev->core, "FIFO full, rewinding\n");
221 ps3vram_wait_ring(dev, 200);
222 ps3vram_rewind_ring(dev);
223 }
224
225 mutex_unlock(&ps3_gpu_mutex);
226}
227
228static void ps3vram_bind(struct ps3_system_bus_device *dev)
229{
Geert Uytterhoeven03fa68c2009-06-10 04:38:54 +0000230 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000231
232 ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0, 1);
233 ps3vram_out_ring(priv, 0x31337303);
234 ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x180, 3);
235 ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
236 ps3vram_out_ring(priv, 0xfeed0001); /* DMA system RAM instance */
237 ps3vram_out_ring(priv, 0xfeed0000); /* DMA video RAM instance */
238
239 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0, 1);
240 ps3vram_out_ring(priv, 0x3137c0de);
241 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x180, 3);
242 ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
243 ps3vram_out_ring(priv, 0xfeed0000); /* DMA video RAM instance */
244 ps3vram_out_ring(priv, 0xfeed0001); /* DMA system RAM instance */
245
246 ps3vram_fire_ring(dev);
247}
248
249static int ps3vram_upload(struct ps3_system_bus_device *dev,
250 unsigned int src_offset, unsigned int dst_offset,
251 int len, int count)
252{
Geert Uytterhoeven03fa68c2009-06-10 04:38:54 +0000253 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000254
255 ps3vram_begin_ring(priv, UPLOAD_SUBCH,
256 NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
257 ps3vram_out_ring(priv, XDR_IOIF + src_offset);
258 ps3vram_out_ring(priv, dst_offset);
259 ps3vram_out_ring(priv, len);
260 ps3vram_out_ring(priv, len);
261 ps3vram_out_ring(priv, len);
262 ps3vram_out_ring(priv, count);
263 ps3vram_out_ring(priv, (1 << 8) | 1);
264 ps3vram_out_ring(priv, 0);
265
266 ps3vram_notifier_reset(dev);
267 ps3vram_begin_ring(priv, UPLOAD_SUBCH,
268 NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
269 ps3vram_out_ring(priv, 0);
270 ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x100, 1);
271 ps3vram_out_ring(priv, 0);
272 ps3vram_fire_ring(dev);
273 if (ps3vram_notifier_wait(dev, 200) < 0) {
274 dev_warn(&dev->core, "%s: Notifier timeout\n", __func__);
275 return -1;
276 }
277
278 return 0;
279}
280
281static int ps3vram_download(struct ps3_system_bus_device *dev,
282 unsigned int src_offset, unsigned int dst_offset,
283 int len, int count)
284{
Geert Uytterhoeven03fa68c2009-06-10 04:38:54 +0000285 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000286
287 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
288 NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
289 ps3vram_out_ring(priv, src_offset);
290 ps3vram_out_ring(priv, XDR_IOIF + dst_offset);
291 ps3vram_out_ring(priv, len);
292 ps3vram_out_ring(priv, len);
293 ps3vram_out_ring(priv, len);
294 ps3vram_out_ring(priv, count);
295 ps3vram_out_ring(priv, (1 << 8) | 1);
296 ps3vram_out_ring(priv, 0);
297
298 ps3vram_notifier_reset(dev);
299 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
300 NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
301 ps3vram_out_ring(priv, 0);
302 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x100, 1);
303 ps3vram_out_ring(priv, 0);
304 ps3vram_fire_ring(dev);
305 if (ps3vram_notifier_wait(dev, 200) < 0) {
306 dev_warn(&dev->core, "%s: Notifier timeout\n", __func__);
307 return -1;
308 }
309
310 return 0;
311}
312
313static void ps3vram_cache_evict(struct ps3_system_bus_device *dev, int entry)
314{
Geert Uytterhoeven03fa68c2009-06-10 04:38:54 +0000315 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000316 struct ps3vram_cache *cache = &priv->cache;
317
318 if (!(cache->tags[entry].flags & CACHE_PAGE_DIRTY))
319 return;
320
321 dev_dbg(&dev->core, "Flushing %d: 0x%08x\n", entry,
322 cache->tags[entry].address);
323 if (ps3vram_upload(dev, CACHE_OFFSET + entry * cache->page_size,
324 cache->tags[entry].address, DMA_PAGE_SIZE,
325 cache->page_size / DMA_PAGE_SIZE) < 0) {
326 dev_err(&dev->core,
327 "Failed to upload from 0x%x to " "0x%x size 0x%x\n",
328 entry * cache->page_size, cache->tags[entry].address,
329 cache->page_size);
330 }
331 cache->tags[entry].flags &= ~CACHE_PAGE_DIRTY;
332}
333
334static void ps3vram_cache_load(struct ps3_system_bus_device *dev, int entry,
335 unsigned int address)
336{
Geert Uytterhoeven03fa68c2009-06-10 04:38:54 +0000337 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000338 struct ps3vram_cache *cache = &priv->cache;
339
340 dev_dbg(&dev->core, "Fetching %d: 0x%08x\n", entry, address);
341 if (ps3vram_download(dev, address,
342 CACHE_OFFSET + entry * cache->page_size,
343 DMA_PAGE_SIZE,
344 cache->page_size / DMA_PAGE_SIZE) < 0) {
345 dev_err(&dev->core,
346 "Failed to download from 0x%x to 0x%x size 0x%x\n",
347 address, entry * cache->page_size, cache->page_size);
348 }
349
350 cache->tags[entry].address = address;
351 cache->tags[entry].flags |= CACHE_PAGE_PRESENT;
352}
353
354
355static void ps3vram_cache_flush(struct ps3_system_bus_device *dev)
356{
Geert Uytterhoeven03fa68c2009-06-10 04:38:54 +0000357 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000358 struct ps3vram_cache *cache = &priv->cache;
359 int i;
360
361 dev_dbg(&dev->core, "FLUSH\n");
362 for (i = 0; i < cache->page_count; i++) {
363 ps3vram_cache_evict(dev, i);
364 cache->tags[i].flags = 0;
365 }
366}
367
368static unsigned int ps3vram_cache_match(struct ps3_system_bus_device *dev,
369 loff_t address)
370{
Geert Uytterhoeven03fa68c2009-06-10 04:38:54 +0000371 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000372 struct ps3vram_cache *cache = &priv->cache;
373 unsigned int base;
374 unsigned int offset;
375 int i;
376 static int counter;
377
378 offset = (unsigned int) (address & (cache->page_size - 1));
379 base = (unsigned int) (address - offset);
380
381 /* fully associative check */
382 for (i = 0; i < cache->page_count; i++) {
383 if ((cache->tags[i].flags & CACHE_PAGE_PRESENT) &&
384 cache->tags[i].address == base) {
385 cache->hit++;
386 dev_dbg(&dev->core, "Found entry %d: 0x%08x\n", i,
387 cache->tags[i].address);
388 return i;
389 }
390 }
391
392 /* choose a random entry */
393 i = (jiffies + (counter++)) % cache->page_count;
394 dev_dbg(&dev->core, "Using entry %d\n", i);
395
396 ps3vram_cache_evict(dev, i);
397 ps3vram_cache_load(dev, i, base);
398
399 cache->miss++;
400 return i;
401}
402
403static int ps3vram_cache_init(struct ps3_system_bus_device *dev)
404{
Geert Uytterhoeven03fa68c2009-06-10 04:38:54 +0000405 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000406
407 priv->cache.page_count = CACHE_PAGE_COUNT;
408 priv->cache.page_size = CACHE_PAGE_SIZE;
409 priv->cache.tags = kzalloc(sizeof(struct ps3vram_tag) *
410 CACHE_PAGE_COUNT, GFP_KERNEL);
411 if (priv->cache.tags == NULL) {
412 dev_err(&dev->core, "Could not allocate cache tags\n");
413 return -ENOMEM;
414 }
415
416 dev_info(&dev->core, "Created ram cache: %d entries, %d KiB each\n",
417 CACHE_PAGE_COUNT, CACHE_PAGE_SIZE / 1024);
418
419 return 0;
420}
421
422static void ps3vram_cache_cleanup(struct ps3_system_bus_device *dev)
423{
Geert Uytterhoeven03fa68c2009-06-10 04:38:54 +0000424 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000425
426 ps3vram_cache_flush(dev);
427 kfree(priv->cache.tags);
428}
429
430static int ps3vram_read(struct ps3_system_bus_device *dev, loff_t from,
431 size_t len, size_t *retlen, u_char *buf)
432{
Geert Uytterhoeven03fa68c2009-06-10 04:38:54 +0000433 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000434 unsigned int cached, count;
435
436 dev_dbg(&dev->core, "%s: from=0x%08x len=0x%zx\n", __func__,
437 (unsigned int)from, len);
438
439 if (from >= priv->size)
440 return -EIO;
441
442 if (len > priv->size - from)
443 len = priv->size - from;
444
445 /* Copy from vram to buf */
446 count = len;
447 while (count) {
448 unsigned int offset, avail;
449 unsigned int entry;
450
451 offset = (unsigned int) (from & (priv->cache.page_size - 1));
452 avail = priv->cache.page_size - offset;
453
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000454 entry = ps3vram_cache_match(dev, from);
455 cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
456
457 dev_dbg(&dev->core, "%s: from=%08x cached=%08x offset=%08x "
458 "avail=%08x count=%08x\n", __func__,
459 (unsigned int)from, cached, offset, avail, count);
460
461 if (avail > count)
462 avail = count;
463 memcpy(buf, priv->xdr_buf + cached, avail);
464
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000465 buf += avail;
466 count -= avail;
467 from += avail;
468 }
469
470 *retlen = len;
471 return 0;
472}
473
474static int ps3vram_write(struct ps3_system_bus_device *dev, loff_t to,
475 size_t len, size_t *retlen, const u_char *buf)
476{
Geert Uytterhoeven03fa68c2009-06-10 04:38:54 +0000477 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000478 unsigned int cached, count;
479
480 if (to >= priv->size)
481 return -EIO;
482
483 if (len > priv->size - to)
484 len = priv->size - to;
485
486 /* Copy from buf to vram */
487 count = len;
488 while (count) {
489 unsigned int offset, avail;
490 unsigned int entry;
491
492 offset = (unsigned int) (to & (priv->cache.page_size - 1));
493 avail = priv->cache.page_size - offset;
494
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000495 entry = ps3vram_cache_match(dev, to);
496 cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
497
498 dev_dbg(&dev->core, "%s: to=%08x cached=%08x offset=%08x "
499 "avail=%08x count=%08x\n", __func__, (unsigned int)to,
500 cached, offset, avail, count);
501
502 if (avail > count)
503 avail = count;
504 memcpy(priv->xdr_buf + cached, buf, avail);
505
506 priv->cache.tags[entry].flags |= CACHE_PAGE_DIRTY;
507
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000508 buf += avail;
509 count -= avail;
510 to += avail;
511 }
512
513 *retlen = len;
514 return 0;
515}
516
517static int ps3vram_proc_show(struct seq_file *m, void *v)
518{
519 struct ps3vram_priv *priv = m->private;
520
521 seq_printf(m, "hit:%u\nmiss:%u\n", priv->cache.hit, priv->cache.miss);
522 return 0;
523}
524
525static int ps3vram_proc_open(struct inode *inode, struct file *file)
526{
527 return single_open(file, ps3vram_proc_show, PDE(inode)->data);
528}
529
530static const struct file_operations ps3vram_proc_fops = {
531 .owner = THIS_MODULE,
532 .open = ps3vram_proc_open,
533 .read = seq_read,
534 .llseek = seq_lseek,
535 .release = single_release,
536};
537
538static void __devinit ps3vram_proc_init(struct ps3_system_bus_device *dev)
539{
Geert Uytterhoeven03fa68c2009-06-10 04:38:54 +0000540 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000541 struct proc_dir_entry *pde;
542
Geert Uytterhoeven3c20e2f2009-06-10 04:38:38 +0000543 pde = proc_create_data(DEVICE_NAME, 0444, NULL, &ps3vram_proc_fops,
544 priv);
545 if (!pde)
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000546 dev_warn(&dev->core, "failed to create /proc entry\n");
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000547}
548
Geert Uytterhoevenfb89e892009-06-10 04:38:41 +0000549static struct bio *ps3vram_do_bio(struct ps3_system_bus_device *dev,
550 struct bio *bio)
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000551{
Geert Uytterhoeven03fa68c2009-06-10 04:38:54 +0000552 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000553 int write = bio_data_dir(bio) == WRITE;
554 const char *op = write ? "write" : "read";
555 loff_t offset = bio->bi_sector << 9;
556 int error = 0;
557 struct bio_vec *bvec;
558 unsigned int i;
Geert Uytterhoevenfb89e892009-06-10 04:38:41 +0000559 struct bio *next;
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000560
561 bio_for_each_segment(bvec, bio, i) {
562 /* PS3 is ppc64, so we don't handle highmem */
563 char *ptr = page_address(bvec->bv_page) + bvec->bv_offset;
564 size_t len = bvec->bv_len, retlen;
565
566 dev_dbg(&dev->core, " %s %zu bytes at offset %llu\n", op,
567 len, offset);
568 if (write)
569 error = ps3vram_write(dev, offset, len, &retlen, ptr);
570 else
571 error = ps3vram_read(dev, offset, len, &retlen, ptr);
572
573 if (error) {
574 dev_err(&dev->core, "%s failed\n", op);
575 goto out;
576 }
577
578 if (retlen != len) {
579 dev_err(&dev->core, "Short %s\n", op);
Geert Uytterhoeven734957c82009-06-10 04:38:37 +0000580 error = -EIO;
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000581 goto out;
582 }
583
584 offset += len;
585 }
586
587 dev_dbg(&dev->core, "%s completed\n", op);
588
589out:
Geert Uytterhoevenfb89e892009-06-10 04:38:41 +0000590 spin_lock_irq(&priv->lock);
591 bio_list_pop(&priv->list);
592 next = bio_list_peek(&priv->list);
593 spin_unlock_irq(&priv->lock);
594
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000595 bio_endio(bio, error);
Geert Uytterhoevenfb89e892009-06-10 04:38:41 +0000596 return next;
597}
598
Christoph Hellwig5a7bbad2011-09-12 12:12:01 +0200599static void ps3vram_make_request(struct request_queue *q, struct bio *bio)
Geert Uytterhoevenfb89e892009-06-10 04:38:41 +0000600{
601 struct ps3_system_bus_device *dev = q->queuedata;
Geert Uytterhoeven03fa68c2009-06-10 04:38:54 +0000602 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
Geert Uytterhoevenfb89e892009-06-10 04:38:41 +0000603 int busy;
604
605 dev_dbg(&dev->core, "%s\n", __func__);
606
607 spin_lock_irq(&priv->lock);
608 busy = !bio_list_empty(&priv->list);
609 bio_list_add(&priv->list, bio);
610 spin_unlock_irq(&priv->lock);
611
612 if (busy)
Christoph Hellwig5a7bbad2011-09-12 12:12:01 +0200613 return;
Geert Uytterhoevenfb89e892009-06-10 04:38:41 +0000614
615 do {
616 bio = ps3vram_do_bio(dev, bio);
617 } while (bio);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000618}
619
620static int __devinit ps3vram_probe(struct ps3_system_bus_device *dev)
621{
622 struct ps3vram_priv *priv;
623 int error, status;
624 struct request_queue *queue;
625 struct gendisk *gendisk;
Geert Uytterhoeven56ac72d2009-06-10 04:38:47 +0000626 u64 ddr_size, ddr_lpar, ctrl_lpar, info_lpar, reports_lpar,
627 reports_size, xdr_lpar;
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000628 char *rest;
629
630 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
631 if (!priv) {
632 error = -ENOMEM;
633 goto fail;
634 }
635
Geert Uytterhoevenfb89e892009-06-10 04:38:41 +0000636 spin_lock_init(&priv->lock);
637 bio_list_init(&priv->list);
Geert Uytterhoeven03fa68c2009-06-10 04:38:54 +0000638 ps3_system_bus_set_drvdata(dev, priv);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000639
640 /* Allocate XDR buffer (1MiB aligned) */
641 priv->xdr_buf = (void *)__get_free_pages(GFP_KERNEL,
642 get_order(XDR_BUF_SIZE));
643 if (priv->xdr_buf == NULL) {
644 dev_err(&dev->core, "Could not allocate XDR buffer\n");
645 error = -ENOMEM;
646 goto fail_free_priv;
647 }
648
649 /* Put FIFO at begginning of XDR buffer */
650 priv->fifo_base = (u32 *) (priv->xdr_buf + FIFO_OFFSET);
651 priv->fifo_ptr = priv->fifo_base;
652
653 /* XXX: Need to open GPU, in case ps3fb or snd_ps3 aren't loaded */
654 if (ps3_open_hv_device(dev)) {
655 dev_err(&dev->core, "ps3_open_hv_device failed\n");
656 error = -EAGAIN;
Jim Paris3273d872009-06-10 04:38:39 +0000657 goto out_free_xdr_buf;
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000658 }
659
660 /* Request memory */
661 status = -1;
662 ddr_size = ALIGN(memparse(size, &rest), 1024*1024);
663 if (!ddr_size) {
664 dev_err(&dev->core, "Specified size is too small\n");
665 error = -EINVAL;
666 goto out_close_gpu;
667 }
668
669 while (ddr_size > 0) {
670 status = lv1_gpu_memory_allocate(ddr_size, 0, 0, 0, 0,
671 &priv->memory_handle,
672 &ddr_lpar);
673 if (!status)
674 break;
675 ddr_size -= 1024*1024;
676 }
677 if (status) {
678 dev_err(&dev->core, "lv1_gpu_memory_allocate failed %d\n",
679 status);
680 error = -ENOMEM;
Jim Paris3273d872009-06-10 04:38:39 +0000681 goto out_close_gpu;
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000682 }
683
684 /* Request context */
685 status = lv1_gpu_context_allocate(priv->memory_handle, 0,
686 &priv->context_handle, &ctrl_lpar,
687 &info_lpar, &reports_lpar,
688 &reports_size);
689 if (status) {
690 dev_err(&dev->core, "lv1_gpu_context_allocate failed %d\n",
691 status);
692 error = -ENOMEM;
693 goto out_free_memory;
694 }
695
696 /* Map XDR buffer to RSX */
Geert Uytterhoeven56ac72d2009-06-10 04:38:47 +0000697 xdr_lpar = ps3_mm_phys_to_lpar(__pa(priv->xdr_buf));
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000698 status = lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF,
Geert Uytterhoeven56ac72d2009-06-10 04:38:47 +0000699 xdr_lpar, XDR_BUF_SIZE,
700 CBE_IOPTE_PP_W | CBE_IOPTE_PP_R |
701 CBE_IOPTE_M);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000702 if (status) {
703 dev_err(&dev->core, "lv1_gpu_context_iomap failed %d\n",
704 status);
705 error = -ENOMEM;
706 goto out_free_context;
707 }
708
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000709 priv->ctrl = ioremap(ctrl_lpar, 64 * 1024);
710 if (!priv->ctrl) {
711 dev_err(&dev->core, "ioremap CTRL failed\n");
712 error = -ENOMEM;
Geert Uytterhoevenc3b94fd2009-06-10 04:38:50 +0000713 goto out_unmap_context;
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000714 }
715
716 priv->reports = ioremap(reports_lpar, reports_size);
717 if (!priv->reports) {
718 dev_err(&dev->core, "ioremap REPORTS failed\n");
719 error = -ENOMEM;
720 goto out_unmap_ctrl;
721 }
722
723 mutex_lock(&ps3_gpu_mutex);
724 ps3vram_init_ring(dev);
725 mutex_unlock(&ps3_gpu_mutex);
726
727 priv->size = ddr_size;
728
729 ps3vram_bind(dev);
730
731 mutex_lock(&ps3_gpu_mutex);
732 error = ps3vram_wait_ring(dev, 100);
733 mutex_unlock(&ps3_gpu_mutex);
734 if (error < 0) {
735 dev_err(&dev->core, "Failed to initialize channels\n");
736 error = -ETIMEDOUT;
737 goto out_unmap_reports;
738 }
739
740 ps3vram_cache_init(dev);
741 ps3vram_proc_init(dev);
742
743 queue = blk_alloc_queue(GFP_KERNEL);
744 if (!queue) {
745 dev_err(&dev->core, "blk_alloc_queue failed\n");
746 error = -ENOMEM;
747 goto out_cache_cleanup;
748 }
749
750 priv->queue = queue;
751 queue->queuedata = dev;
752 blk_queue_make_request(queue, ps3vram_make_request);
Stephen Rothwell91f63d02010-03-01 19:21:01 +1100753 blk_queue_max_segments(queue, BLK_MAX_SEGMENTS);
Martin K. Peterseneb28d312010-02-26 00:20:37 -0500754 blk_queue_max_segment_size(queue, BLK_MAX_SEGMENT_SIZE);
Martin K. Petersen086fa5f2010-02-26 00:20:38 -0500755 blk_queue_max_hw_sectors(queue, BLK_SAFE_MAX_SECTORS);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000756
757 gendisk = alloc_disk(1);
758 if (!gendisk) {
759 dev_err(&dev->core, "alloc_disk failed\n");
760 error = -ENOMEM;
761 goto fail_cleanup_queue;
762 }
763
764 priv->gendisk = gendisk;
765 gendisk->major = ps3vram_major;
766 gendisk->first_minor = 0;
767 gendisk->fops = &ps3vram_fops;
768 gendisk->queue = queue;
769 gendisk->private_data = dev;
770 gendisk->driverfs_dev = &dev->core;
771 strlcpy(gendisk->disk_name, DEVICE_NAME, sizeof(gendisk->disk_name));
772 set_capacity(gendisk, priv->size >> 9);
773
774 dev_info(&dev->core, "%s: Using %lu MiB of GPU memory\n",
775 gendisk->disk_name, get_capacity(gendisk) >> 11);
776
777 add_disk(gendisk);
778 return 0;
779
780fail_cleanup_queue:
781 blk_cleanup_queue(queue);
782out_cache_cleanup:
783 remove_proc_entry(DEVICE_NAME, NULL);
784 ps3vram_cache_cleanup(dev);
785out_unmap_reports:
786 iounmap(priv->reports);
787out_unmap_ctrl:
788 iounmap(priv->ctrl);
Geert Uytterhoeven56ac72d2009-06-10 04:38:47 +0000789out_unmap_context:
790 lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF, xdr_lpar,
791 XDR_BUF_SIZE, CBE_IOPTE_M);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000792out_free_context:
793 lv1_gpu_context_free(priv->context_handle);
794out_free_memory:
795 lv1_gpu_memory_free(priv->memory_handle);
796out_close_gpu:
797 ps3_close_hv_device(dev);
798out_free_xdr_buf:
799 free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
800fail_free_priv:
801 kfree(priv);
Geert Uytterhoeven03fa68c2009-06-10 04:38:54 +0000802 ps3_system_bus_set_drvdata(dev, NULL);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000803fail:
804 return error;
805}
806
807static int ps3vram_remove(struct ps3_system_bus_device *dev)
808{
Geert Uytterhoeven03fa68c2009-06-10 04:38:54 +0000809 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000810
811 del_gendisk(priv->gendisk);
812 put_disk(priv->gendisk);
813 blk_cleanup_queue(priv->queue);
814 remove_proc_entry(DEVICE_NAME, NULL);
815 ps3vram_cache_cleanup(dev);
816 iounmap(priv->reports);
817 iounmap(priv->ctrl);
Geert Uytterhoeven56ac72d2009-06-10 04:38:47 +0000818 lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF,
819 ps3_mm_phys_to_lpar(__pa(priv->xdr_buf)),
820 XDR_BUF_SIZE, CBE_IOPTE_M);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000821 lv1_gpu_context_free(priv->context_handle);
822 lv1_gpu_memory_free(priv->memory_handle);
823 ps3_close_hv_device(dev);
824 free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
825 kfree(priv);
Geert Uytterhoeven03fa68c2009-06-10 04:38:54 +0000826 ps3_system_bus_set_drvdata(dev, NULL);
Geert Uytterhoevenf507cd22009-03-06 02:54:09 +0000827 return 0;
828}
829
830static struct ps3_system_bus_driver ps3vram = {
831 .match_id = PS3_MATCH_ID_GPU,
832 .match_sub_id = PS3_MATCH_SUB_ID_GPU_RAMDISK,
833 .core.name = DEVICE_NAME,
834 .core.owner = THIS_MODULE,
835 .probe = ps3vram_probe,
836 .remove = ps3vram_remove,
837 .shutdown = ps3vram_remove,
838};
839
840
841static int __init ps3vram_init(void)
842{
843 int error;
844
845 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
846 return -ENODEV;
847
848 error = register_blkdev(0, DEVICE_NAME);
849 if (error <= 0) {
850 pr_err("%s: register_blkdev failed %d\n", DEVICE_NAME, error);
851 return error;
852 }
853 ps3vram_major = error;
854
855 pr_info("%s: registered block device major %d\n", DEVICE_NAME,
856 ps3vram_major);
857
858 error = ps3_system_bus_driver_register(&ps3vram);
859 if (error)
860 unregister_blkdev(ps3vram_major, DEVICE_NAME);
861
862 return error;
863}
864
865static void __exit ps3vram_exit(void)
866{
867 ps3_system_bus_driver_unregister(&ps3vram);
868 unregister_blkdev(ps3vram_major, DEVICE_NAME);
869}
870
871module_init(ps3vram_init);
872module_exit(ps3vram_exit);
873
874MODULE_LICENSE("GPL");
875MODULE_DESCRIPTION("PS3 Video RAM Storage Driver");
876MODULE_AUTHOR("Sony Corporation");
877MODULE_ALIAS(PS3_MODULE_ALIAS_GPU_RAMDISK);