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authorJim Paris <jim@jtan.com>2009-01-06 06:32:10 -0500
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-01-08 00:25:14 -0500
commitcffb4add03b1fc83026b06dc3664279cfbf70155 (patch)
treef9b2b351a3a330768b81919897f3be193fd9e88d
parentd2b4397bf87cf6547ca9fa75b6b84eada96c0848 (diff)
mtd/ps3vram: Add ps3vram driver for accessing video RAM as MTD
Add ps3vram driver, which exposes unused video RAM on the PS3 as a MTD device suitable for storage or swap. Fast data transfer is achieved using a local cache in system RAM and DMA transfers via the GPU. Signed-off-by: Vivien Chappelier <vivien.chappelier@free.fr> Signed-off-by: Jim Paris <jim@jtan.com> Acked-by: Geoff Levand <geoffrey.levand@am.sony.com> Acked-by: David Woodhouse <David.Woodhouse@intel.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
-rw-r--r--MAINTAINERS6
-rw-r--r--arch/powerpc/include/asm/ps3.h1
-rw-r--r--arch/powerpc/platforms/ps3/device-init.c37
-rw-r--r--drivers/mtd/devices/Kconfig7
-rw-r--r--drivers/mtd/devices/Makefile1
-rw-r--r--drivers/mtd/devices/ps3vram.c776
6 files changed, 828 insertions, 0 deletions
diff --git a/MAINTAINERS b/MAINTAINERS
index a01884407fe4..246878f41cf5 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3484,6 +3484,12 @@ L: linuxppc-dev@ozlabs.org
3484L: cbe-oss-dev@ozlabs.org 3484L: cbe-oss-dev@ozlabs.org
3485S: Supported 3485S: Supported
3486 3486
3487PS3VRAM DRIVER
3488P: Jim Paris
3489M: jim@jtan.com
3490L: cbe-oss-dev@ozlabs.org
3491S: Maintained
3492
3487PVRUSB2 VIDEO4LINUX DRIVER 3493PVRUSB2 VIDEO4LINUX DRIVER
3488P: Mike Isely 3494P: Mike Isely
3489M: isely@pobox.com 3495M: isely@pobox.com
diff --git a/arch/powerpc/include/asm/ps3.h b/arch/powerpc/include/asm/ps3.h
index cff30c0ef1ff..66b650532adf 100644
--- a/arch/powerpc/include/asm/ps3.h
+++ b/arch/powerpc/include/asm/ps3.h
@@ -320,6 +320,7 @@ enum ps3_match_id {
320 320
321enum ps3_match_sub_id { 321enum ps3_match_sub_id {
322 PS3_MATCH_SUB_ID_GPU_FB = 1, 322 PS3_MATCH_SUB_ID_GPU_FB = 1,
323 PS3_MATCH_SUB_ID_GPU_RAMDISK = 2,
323}; 324};
324 325
325#define PS3_MODULE_ALIAS_EHCI "ps3:1:0" 326#define PS3_MODULE_ALIAS_EHCI "ps3:1:0"
diff --git a/arch/powerpc/platforms/ps3/device-init.c b/arch/powerpc/platforms/ps3/device-init.c
index dbc124e05646..ca71a12b764c 100644
--- a/arch/powerpc/platforms/ps3/device-init.c
+++ b/arch/powerpc/platforms/ps3/device-init.c
@@ -518,6 +518,41 @@ fail_device_register:
518 return result; 518 return result;
519} 519}
520 520
521static int __init ps3_register_ramdisk_device(void)
522{
523 int result;
524 struct layout {
525 struct ps3_system_bus_device dev;
526 } *p;
527
528 pr_debug(" -> %s:%d\n", __func__, __LINE__);
529
530 p = kzalloc(sizeof(struct layout), GFP_KERNEL);
531
532 if (!p)
533 return -ENOMEM;
534
535 p->dev.match_id = PS3_MATCH_ID_GPU;
536 p->dev.match_sub_id = PS3_MATCH_SUB_ID_GPU_RAMDISK;
537 p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
538
539 result = ps3_system_bus_device_register(&p->dev);
540
541 if (result) {
542 pr_debug("%s:%d ps3_system_bus_device_register failed\n",
543 __func__, __LINE__);
544 goto fail_device_register;
545 }
546
547 pr_debug(" <- %s:%d\n", __func__, __LINE__);
548 return 0;
549
550fail_device_register:
551 kfree(p);
552 pr_debug(" <- %s:%d failed\n", __func__, __LINE__);
553 return result;
554}
555
521/** 556/**
522 * ps3_setup_dynamic_device - Setup a dynamic device from the repository 557 * ps3_setup_dynamic_device - Setup a dynamic device from the repository
523 */ 558 */
@@ -946,6 +981,8 @@ static int __init ps3_register_devices(void)
946 981
947 ps3_register_lpm_devices(); 982 ps3_register_lpm_devices();
948 983
984 ps3_register_ramdisk_device();
985
949 pr_debug(" <- %s:%d\n", __func__, __LINE__); 986 pr_debug(" <- %s:%d\n", __func__, __LINE__);
950 return 0; 987 return 0;
951} 988}
diff --git a/drivers/mtd/devices/Kconfig b/drivers/mtd/devices/Kconfig
index 6fde0a2e3567..bc33200535fc 100644
--- a/drivers/mtd/devices/Kconfig
+++ b/drivers/mtd/devices/Kconfig
@@ -120,6 +120,13 @@ config MTD_PHRAM
120 doesn't have access to, memory beyond the mem=xxx limit, nvram, 120 doesn't have access to, memory beyond the mem=xxx limit, nvram,
121 memory on the video card, etc... 121 memory on the video card, etc...
122 122
123config MTD_PS3VRAM
124 tristate "PS3 video RAM"
125 depends on FB_PS3
126 help
127 This driver allows you to use excess PS3 video RAM as volatile
128 storage or system swap.
129
123config MTD_LART 130config MTD_LART
124 tristate "28F160xx flash driver for LART" 131 tristate "28F160xx flash driver for LART"
125 depends on SA1100_LART 132 depends on SA1100_LART
diff --git a/drivers/mtd/devices/Makefile b/drivers/mtd/devices/Makefile
index 0993d5cf3923..e51521df4e40 100644
--- a/drivers/mtd/devices/Makefile
+++ b/drivers/mtd/devices/Makefile
@@ -16,3 +16,4 @@ obj-$(CONFIG_MTD_LART) += lart.o
16obj-$(CONFIG_MTD_BLOCK2MTD) += block2mtd.o 16obj-$(CONFIG_MTD_BLOCK2MTD) += block2mtd.o
17obj-$(CONFIG_MTD_DATAFLASH) += mtd_dataflash.o 17obj-$(CONFIG_MTD_DATAFLASH) += mtd_dataflash.o
18obj-$(CONFIG_MTD_M25P80) += m25p80.o 18obj-$(CONFIG_MTD_M25P80) += m25p80.o
19obj-$(CONFIG_MTD_PS3VRAM) += ps3vram.o
diff --git a/drivers/mtd/devices/ps3vram.c b/drivers/mtd/devices/ps3vram.c
new file mode 100644
index 000000000000..26a4b57662f6
--- /dev/null
+++ b/drivers/mtd/devices/ps3vram.c
@@ -0,0 +1,776 @@
1/**
2 * ps3vram - Use extra PS3 video ram as MTD block device.
3 *
4 * Copyright (c) 2007-2008 Jim Paris <jim@jtan.com>
5 * Added support RSX DMA Vivien Chappelier <vivien.chappelier@free.fr>
6 */
7
8#include <linux/io.h>
9#include <linux/init.h>
10#include <linux/kernel.h>
11#include <linux/list.h>
12#include <linux/module.h>
13#include <linux/moduleparam.h>
14#include <linux/slab.h>
15#include <linux/version.h>
16#include <linux/gfp.h>
17#include <linux/delay.h>
18#include <linux/mtd/mtd.h>
19
20#include <asm/lv1call.h>
21#include <asm/ps3.h>
22
23#define DEVICE_NAME "ps3vram"
24
25#define XDR_BUF_SIZE (2 * 1024 * 1024) /* XDR buffer (must be 1MiB aligned) */
26#define XDR_IOIF 0x0c000000
27
28#define FIFO_BASE XDR_IOIF
29#define FIFO_SIZE (64 * 1024)
30
31#define DMA_PAGE_SIZE (4 * 1024)
32
33#define CACHE_PAGE_SIZE (256 * 1024)
34#define CACHE_PAGE_COUNT ((XDR_BUF_SIZE - FIFO_SIZE) / CACHE_PAGE_SIZE)
35
36#define CACHE_OFFSET CACHE_PAGE_SIZE
37#define FIFO_OFFSET 0
38
39#define CTRL_PUT 0x10
40#define CTRL_GET 0x11
41#define CTRL_TOP 0x15
42
43#define UPLOAD_SUBCH 1
44#define DOWNLOAD_SUBCH 2
45
46#define NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN 0x0000030c
47#define NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY 0x00000104
48
49#define L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT 0x601
50
51struct mtd_info ps3vram_mtd;
52
53#define CACHE_PAGE_PRESENT 1
54#define CACHE_PAGE_DIRTY 2
55
56#define dbg(fmt, args...) \
57 pr_debug("%s:%d " fmt "\n", __func__, __LINE__, ## args)
58
59struct ps3vram_tag {
60 unsigned int address;
61 unsigned int flags;
62};
63
64struct ps3vram_cache {
65 unsigned int page_count;
66 unsigned int page_size;
67 struct ps3vram_tag *tags;
68};
69
70struct ps3vram_priv {
71 uint64_t memory_handle;
72 uint64_t context_handle;
73 uint8_t *base;
74 uint32_t *ctrl;
75 uint32_t *reports;
76 uint8_t *xdr_buf;
77
78 uint32_t *fifo_base;
79 uint32_t *fifo_ptr;
80
81 struct ps3vram_cache cache;
82
83 /* Used to serialize cache/DMA operations */
84 struct mutex lock;
85};
86
87#define DMA_NOTIFIER_HANDLE_BASE 0x66604200 /* first DMA notifier handle */
88#define DMA_NOTIFIER_OFFSET_BASE 0x1000 /* first DMA notifier offset */
89#define DMA_NOTIFIER_SIZE 0x40
90
91#define NUM_NOTIFIERS 16
92
93#define NOTIFIER 7 /* notifier used for completion report */
94
95/* A trailing '-' means to subtract off ps3fb_videomemory.size */
96char *size = "256M-";
97module_param(size, charp, 0);
98MODULE_PARM_DESC(size, "memory size");
99
100static inline uint32_t *ps3vram_get_notifier(uint32_t *reports, int notifier)
101{
102 return (void *) reports +
103 DMA_NOTIFIER_OFFSET_BASE +
104 DMA_NOTIFIER_SIZE * notifier;
105}
106
107static void ps3vram_notifier_reset(struct mtd_info *mtd)
108{
109 int i;
110 struct ps3vram_priv *priv = mtd->priv;
111 uint32_t *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
112 for (i = 0; i < 4; i++)
113 notify[i] = 0xffffffff;
114}
115
116static int ps3vram_notifier_wait(struct mtd_info *mtd, int timeout_ms)
117{
118 struct ps3vram_priv *priv = mtd->priv;
119 uint32_t *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
120
121 timeout_ms *= 1000;
122
123 do {
124 if (notify[3] == 0)
125 return 0;
126
127 if (timeout_ms)
128 udelay(1);
129 } while (timeout_ms--);
130
131 return -1;
132}
133
134static void ps3vram_dump_ring(struct mtd_info *mtd)
135{
136 struct ps3vram_priv *priv = mtd->priv;
137 uint32_t *fifo;
138
139 pr_info("PUT = %08x GET = %08x\n", priv->ctrl[CTRL_PUT],
140 priv->ctrl[CTRL_GET]);
141 for (fifo = priv->fifo_base; fifo < priv->fifo_ptr; fifo++)
142 pr_info("%p: %08x\n", fifo, *fifo);
143}
144
145static void ps3vram_dump_reports(struct mtd_info *mtd)
146{
147 struct ps3vram_priv *priv = mtd->priv;
148 int i;
149
150 for (i = 0; i < NUM_NOTIFIERS; i++) {
151 uint32_t *n = ps3vram_get_notifier(priv->reports, i);
152 pr_info("%p: %08x\n", n, *n);
153 }
154}
155
156static void ps3vram_init_ring(struct mtd_info *mtd)
157{
158 struct ps3vram_priv *priv = mtd->priv;
159
160 priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET;
161 priv->ctrl[CTRL_GET] = FIFO_BASE + FIFO_OFFSET;
162}
163
164static int ps3vram_wait_ring(struct mtd_info *mtd, int timeout)
165{
166 struct ps3vram_priv *priv = mtd->priv;
167
168 /* wait until setup commands are processed */
169 timeout *= 1000;
170 while (--timeout) {
171 if (priv->ctrl[CTRL_PUT] == priv->ctrl[CTRL_GET])
172 break;
173 udelay(1);
174 }
175 if (timeout == 0) {
176 pr_err("FIFO timeout (%08x/%08x/%08x)\n", priv->ctrl[CTRL_PUT],
177 priv->ctrl[CTRL_GET], priv->ctrl[CTRL_TOP]);
178 return -ETIMEDOUT;
179 }
180
181 return 0;
182}
183
184static inline void ps3vram_out_ring(struct ps3vram_priv *priv, uint32_t data)
185{
186 *(priv->fifo_ptr)++ = data;
187}
188
189static inline void ps3vram_begin_ring(struct ps3vram_priv *priv, uint32_t chan,
190 uint32_t tag, uint32_t size)
191{
192 ps3vram_out_ring(priv, (size << 18) | (chan << 13) | tag);
193}
194
195static void ps3vram_rewind_ring(struct mtd_info *mtd)
196{
197 struct ps3vram_priv *priv = mtd->priv;
198 u64 status;
199
200 ps3vram_out_ring(priv, 0x20000000 | (FIFO_BASE + FIFO_OFFSET));
201
202 priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET;
203
204 /* asking the HV for a blit will kick the fifo */
205 status = lv1_gpu_context_attribute(priv->context_handle,
206 L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT,
207 0, 0, 0, 0);
208 if (status)
209 pr_err("ps3vram: lv1_gpu_context_attribute FB_BLIT failed\n");
210
211 priv->fifo_ptr = priv->fifo_base;
212}
213
214static void ps3vram_fire_ring(struct mtd_info *mtd)
215{
216 struct ps3vram_priv *priv = mtd->priv;
217 u64 status;
218
219 mutex_lock(&ps3_gpu_mutex);
220
221 priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET +
222 (priv->fifo_ptr - priv->fifo_base) * sizeof(uint32_t);
223
224 /* asking the HV for a blit will kick the fifo */
225 status = lv1_gpu_context_attribute(priv->context_handle,
226 L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT,
227 0, 0, 0, 0);
228 if (status)
229 pr_err("ps3vram: lv1_gpu_context_attribute FB_BLIT failed\n");
230
231 if ((priv->fifo_ptr - priv->fifo_base) * sizeof(uint32_t) >
232 FIFO_SIZE - 1024) {
233 dbg("fifo full, rewinding");
234 ps3vram_wait_ring(mtd, 200);
235 ps3vram_rewind_ring(mtd);
236 }
237
238 mutex_unlock(&ps3_gpu_mutex);
239}
240
241static void ps3vram_bind(struct mtd_info *mtd)
242{
243 struct ps3vram_priv *priv = mtd->priv;
244
245 ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0, 1);
246 ps3vram_out_ring(priv, 0x31337303);
247 ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x180, 3);
248 ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
249 ps3vram_out_ring(priv, 0xfeed0001); /* DMA system RAM instance */
250 ps3vram_out_ring(priv, 0xfeed0000); /* DMA video RAM instance */
251
252 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0, 1);
253 ps3vram_out_ring(priv, 0x3137c0de);
254 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x180, 3);
255 ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
256 ps3vram_out_ring(priv, 0xfeed0000); /* DMA video RAM instance */
257 ps3vram_out_ring(priv, 0xfeed0001); /* DMA system RAM instance */
258
259 ps3vram_fire_ring(mtd);
260}
261
262static int ps3vram_upload(struct mtd_info *mtd, unsigned int src_offset,
263 unsigned int dst_offset, int len, int count)
264{
265 struct ps3vram_priv *priv = mtd->priv;
266
267 ps3vram_begin_ring(priv, UPLOAD_SUBCH,
268 NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
269 ps3vram_out_ring(priv, XDR_IOIF + src_offset);
270 ps3vram_out_ring(priv, dst_offset);
271 ps3vram_out_ring(priv, len);
272 ps3vram_out_ring(priv, len);
273 ps3vram_out_ring(priv, len);
274 ps3vram_out_ring(priv, count);
275 ps3vram_out_ring(priv, (1 << 8) | 1);
276 ps3vram_out_ring(priv, 0);
277
278 ps3vram_notifier_reset(mtd);
279 ps3vram_begin_ring(priv, UPLOAD_SUBCH,
280 NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
281 ps3vram_out_ring(priv, 0);
282 ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x100, 1);
283 ps3vram_out_ring(priv, 0);
284 ps3vram_fire_ring(mtd);
285 if (ps3vram_notifier_wait(mtd, 200) < 0) {
286 pr_err("notifier timeout\n");
287 ps3vram_dump_ring(mtd);
288 ps3vram_dump_reports(mtd);
289 return -1;
290 }
291
292 return 0;
293}
294
295static int ps3vram_download(struct mtd_info *mtd, unsigned int src_offset,
296 unsigned int dst_offset, int len, int count)
297{
298 struct ps3vram_priv *priv = mtd->priv;
299
300 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
301 NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
302 ps3vram_out_ring(priv, src_offset);
303 ps3vram_out_ring(priv, XDR_IOIF + dst_offset);
304 ps3vram_out_ring(priv, len);
305 ps3vram_out_ring(priv, len);
306 ps3vram_out_ring(priv, len);
307 ps3vram_out_ring(priv, count);
308 ps3vram_out_ring(priv, (1 << 8) | 1);
309 ps3vram_out_ring(priv, 0);
310
311 ps3vram_notifier_reset(mtd);
312 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
313 NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
314 ps3vram_out_ring(priv, 0);
315 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x100, 1);
316 ps3vram_out_ring(priv, 0);
317 ps3vram_fire_ring(mtd);
318 if (ps3vram_notifier_wait(mtd, 200) < 0) {
319 pr_err("notifier timeout\n");
320 ps3vram_dump_ring(mtd);
321 ps3vram_dump_reports(mtd);
322 return -1;
323 }
324
325 return 0;
326}
327
328static void ps3vram_cache_evict(struct mtd_info *mtd, int entry)
329{
330 struct ps3vram_priv *priv = mtd->priv;
331 struct ps3vram_cache *cache = &priv->cache;
332
333 if (cache->tags[entry].flags & CACHE_PAGE_DIRTY) {
334 dbg("flushing %d : 0x%08x", entry, cache->tags[entry].address);
335 if (ps3vram_upload(mtd,
336 CACHE_OFFSET + entry * cache->page_size,
337 cache->tags[entry].address,
338 DMA_PAGE_SIZE,
339 cache->page_size / DMA_PAGE_SIZE) < 0) {
340 pr_err("failed to upload from 0x%x to 0x%x size 0x%x\n",
341 entry * cache->page_size,
342 cache->tags[entry].address,
343 cache->page_size);
344 }
345 cache->tags[entry].flags &= ~CACHE_PAGE_DIRTY;
346 }
347}
348
349static void ps3vram_cache_load(struct mtd_info *mtd, int entry,
350 unsigned int address)
351{
352 struct ps3vram_priv *priv = mtd->priv;
353 struct ps3vram_cache *cache = &priv->cache;
354
355 dbg("fetching %d : 0x%08x", entry, address);
356 if (ps3vram_download(mtd,
357 address,
358 CACHE_OFFSET + entry * cache->page_size,
359 DMA_PAGE_SIZE,
360 cache->page_size / DMA_PAGE_SIZE) < 0) {
361 pr_err("failed to download from 0x%x to 0x%x size 0x%x\n",
362 address,
363 entry * cache->page_size,
364 cache->page_size);
365 }
366
367 cache->tags[entry].address = address;
368 cache->tags[entry].flags |= CACHE_PAGE_PRESENT;
369}
370
371
372static void ps3vram_cache_flush(struct mtd_info *mtd)
373{
374 struct ps3vram_priv *priv = mtd->priv;
375 struct ps3vram_cache *cache = &priv->cache;
376 int i;
377
378 dbg("FLUSH");
379 for (i = 0; i < cache->page_count; i++) {
380 ps3vram_cache_evict(mtd, i);
381 cache->tags[i].flags = 0;
382 }
383}
384
385static unsigned int ps3vram_cache_match(struct mtd_info *mtd, loff_t address)
386{
387 struct ps3vram_priv *priv = mtd->priv;
388 struct ps3vram_cache *cache = &priv->cache;
389 unsigned int base;
390 unsigned int offset;
391 int i;
392 static int counter;
393
394 offset = (unsigned int) (address & (cache->page_size - 1));
395 base = (unsigned int) (address - offset);
396
397 /* fully associative check */
398 for (i = 0; i < cache->page_count; i++) {
399 if ((cache->tags[i].flags & CACHE_PAGE_PRESENT) &&
400 cache->tags[i].address == base) {
401 dbg("found entry %d : 0x%08x",
402 i, cache->tags[i].address);
403 return i;
404 }
405 }
406
407 /* choose a random entry */
408 i = (jiffies + (counter++)) % cache->page_count;
409 dbg("using cache entry %d", i);
410
411 ps3vram_cache_evict(mtd, i);
412 ps3vram_cache_load(mtd, i, base);
413
414 return i;
415}
416
417static int ps3vram_cache_init(struct mtd_info *mtd)
418{
419 struct ps3vram_priv *priv = mtd->priv;
420
421 pr_info("creating cache: %d entries, %d bytes pages\n",
422 CACHE_PAGE_COUNT, CACHE_PAGE_SIZE);
423
424 priv->cache.page_count = CACHE_PAGE_COUNT;
425 priv->cache.page_size = CACHE_PAGE_SIZE;
426 priv->cache.tags = kzalloc(sizeof(struct ps3vram_tag) *
427 CACHE_PAGE_COUNT, GFP_KERNEL);
428 if (priv->cache.tags == NULL) {
429 pr_err("could not allocate cache tags\n");
430 return -ENOMEM;
431 }
432
433 return 0;
434}
435
436static void ps3vram_cache_cleanup(struct mtd_info *mtd)
437{
438 struct ps3vram_priv *priv = mtd->priv;
439
440 ps3vram_cache_flush(mtd);
441 kfree(priv->cache.tags);
442}
443
444static int ps3vram_erase(struct mtd_info *mtd, struct erase_info *instr)
445{
446 struct ps3vram_priv *priv = mtd->priv;
447
448 if (instr->addr + instr->len > mtd->size)
449 return -EINVAL;
450
451 mutex_lock(&priv->lock);
452
453 ps3vram_cache_flush(mtd);
454
455 /* Set bytes to 0xFF */
456 memset(priv->base + instr->addr, 0xFF, instr->len);
457
458 mutex_unlock(&priv->lock);
459
460 instr->state = MTD_ERASE_DONE;
461 mtd_erase_callback(instr);
462
463 return 0;
464}
465
466
467static int ps3vram_read(struct mtd_info *mtd, loff_t from, size_t len,
468 size_t *retlen, u_char *buf)
469{
470 struct ps3vram_priv *priv = mtd->priv;
471 unsigned int cached, count;
472
473 dbg("from = 0x%08x len = 0x%zx", (unsigned int) from, len);
474
475 if (from >= mtd->size)
476 return -EINVAL;
477
478 if (len > mtd->size - from)
479 len = mtd->size - from;
480
481 /* Copy from vram to buf */
482 count = len;
483 while (count) {
484 unsigned int offset, avail;
485 unsigned int entry;
486
487 offset = (unsigned int) (from & (priv->cache.page_size - 1));
488 avail = priv->cache.page_size - offset;
489
490 mutex_lock(&priv->lock);
491
492 entry = ps3vram_cache_match(mtd, from);
493 cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
494
495 dbg("from=%08x cached=%08x offset=%08x avail=%08x count=%08x",
496 (unsigned)from, cached, offset, avail, count);
497
498 if (avail > count)
499 avail = count;
500 memcpy(buf, priv->xdr_buf + cached, avail);
501
502 mutex_unlock(&priv->lock);
503
504 buf += avail;
505 count -= avail;
506 from += avail;
507 }
508
509 *retlen = len;
510 return 0;
511}
512
513static int ps3vram_write(struct mtd_info *mtd, loff_t to, size_t len,
514 size_t *retlen, const u_char *buf)
515{
516 struct ps3vram_priv *priv = mtd->priv;
517 unsigned int cached, count;
518
519 if (to >= mtd->size)
520 return -EINVAL;
521
522 if (len > mtd->size - to)
523 len = mtd->size - to;
524
525 /* Copy from buf to vram */
526 count = len;
527 while (count) {
528 unsigned int offset, avail;
529 unsigned int entry;
530
531 offset = (unsigned int) (to & (priv->cache.page_size - 1));
532 avail = priv->cache.page_size - offset;
533
534 mutex_lock(&priv->lock);
535
536 entry = ps3vram_cache_match(mtd, to);
537 cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
538
539 dbg("to=%08x cached=%08x offset=%08x avail=%08x count=%08x",
540 (unsigned) to, cached, offset, avail, count);
541
542 if (avail > count)
543 avail = count;
544 memcpy(priv->xdr_buf + cached, buf, avail);
545
546 priv->cache.tags[entry].flags |= CACHE_PAGE_DIRTY;
547
548 mutex_unlock(&priv->lock);
549
550 buf += avail;
551 count -= avail;
552 to += avail;
553 }
554
555 *retlen = len;
556 return 0;
557}
558
559static int __devinit ps3vram_probe(struct ps3_system_bus_device *dev)
560{
561 struct ps3vram_priv *priv;
562 uint64_t status;
563 uint64_t ddr_lpar, ctrl_lpar, info_lpar, reports_lpar;
564 int64_t ddr_size;
565 uint64_t reports_size;
566 int ret = -ENOMEM;
567 char *rest;
568
569 ret = -EIO;
570 ps3vram_mtd.priv = kzalloc(sizeof(struct ps3vram_priv), GFP_KERNEL);
571 if (!ps3vram_mtd.priv)
572 goto out;
573 priv = ps3vram_mtd.priv;
574
575 mutex_init(&priv->lock);
576
577 /* Allocate XDR buffer (1MiB aligned) */
578 priv->xdr_buf = (uint8_t *) __get_free_pages(GFP_KERNEL,
579 get_order(XDR_BUF_SIZE));
580 if (priv->xdr_buf == NULL) {
581 pr_err("ps3vram: could not allocate XDR buffer\n");
582 ret = -ENOMEM;
583 goto out_free_priv;
584 }
585
586 /* Put FIFO at begginning of XDR buffer */
587 priv->fifo_base = (uint32_t *) (priv->xdr_buf + FIFO_OFFSET);
588 priv->fifo_ptr = priv->fifo_base;
589
590 /* XXX: Need to open GPU, in case ps3fb or snd_ps3 aren't loaded */
591 if (ps3_open_hv_device(dev)) {
592 pr_err("ps3vram: ps3_open_hv_device failed\n");
593 ret = -EAGAIN;
594 goto out_close_gpu;
595 }
596
597 /* Request memory */
598 status = -1;
599 ddr_size = memparse(size, &rest);
600 if (*rest == '-')
601 ddr_size -= ps3fb_videomemory.size;
602 ddr_size = ALIGN(ddr_size, 1024*1024);
603 if (ddr_size <= 0) {
604 printk(KERN_ERR "ps3vram: specified size is too small\n");
605 ret = -EINVAL;
606 goto out_close_gpu;
607 }
608
609 while (ddr_size > 0) {
610 status = lv1_gpu_memory_allocate(ddr_size, 0, 0, 0, 0,
611 &priv->memory_handle,
612 &ddr_lpar);
613 if (status == 0)
614 break;
615 ddr_size -= 1024*1024;
616 }
617 if (status != 0 || ddr_size <= 0) {
618 pr_err("ps3vram: lv1_gpu_memory_allocate failed\n");
619 ret = -ENOMEM;
620 goto out_free_xdr_buf;
621 }
622 pr_info("ps3vram: allocated %u MiB of DDR memory\n",
623 (unsigned int) (ddr_size / 1024 / 1024));
624
625 /* Request context */
626 status = lv1_gpu_context_allocate(priv->memory_handle,
627 0,
628 &priv->context_handle,
629 &ctrl_lpar,
630 &info_lpar,
631 &reports_lpar,
632 &reports_size);
633 if (status) {
634 pr_err("ps3vram: lv1_gpu_context_allocate failed\n");
635 ret = -ENOMEM;
636 goto out_free_memory;
637 }
638
639 /* Map XDR buffer to RSX */
640 status = lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF,
641 ps3_mm_phys_to_lpar(__pa(priv->xdr_buf)),
642 XDR_BUF_SIZE, 0);
643 if (status) {
644 pr_err("ps3vram: lv1_gpu_context_iomap failed\n");
645 ret = -ENOMEM;
646 goto out_free_context;
647 }
648
649 priv->base = ioremap(ddr_lpar, ddr_size);
650 if (!priv->base) {
651 pr_err("ps3vram: ioremap failed\n");
652 ret = -ENOMEM;
653 goto out_free_context;
654 }
655
656 priv->ctrl = ioremap(ctrl_lpar, 64 * 1024);
657 if (!priv->ctrl) {
658 pr_err("ps3vram: ioremap failed\n");
659 ret = -ENOMEM;
660 goto out_unmap_vram;
661 }
662
663 priv->reports = ioremap(reports_lpar, reports_size);
664 if (!priv->reports) {
665 pr_err("ps3vram: ioremap failed\n");
666 ret = -ENOMEM;
667 goto out_unmap_ctrl;
668 }
669
670 mutex_lock(&ps3_gpu_mutex);
671 ps3vram_init_ring(&ps3vram_mtd);
672 mutex_unlock(&ps3_gpu_mutex);
673
674 ps3vram_mtd.name = "ps3vram";
675 ps3vram_mtd.size = ddr_size;
676 ps3vram_mtd.flags = MTD_CAP_RAM;
677 ps3vram_mtd.erase = ps3vram_erase;
678 ps3vram_mtd.point = NULL;
679 ps3vram_mtd.unpoint = NULL;
680 ps3vram_mtd.read = ps3vram_read;
681 ps3vram_mtd.write = ps3vram_write;
682 ps3vram_mtd.owner = THIS_MODULE;
683 ps3vram_mtd.type = MTD_RAM;
684 ps3vram_mtd.erasesize = CACHE_PAGE_SIZE;
685 ps3vram_mtd.writesize = 1;
686
687 ps3vram_bind(&ps3vram_mtd);
688
689 mutex_lock(&ps3_gpu_mutex);
690 ret = ps3vram_wait_ring(&ps3vram_mtd, 100);
691 mutex_unlock(&ps3_gpu_mutex);
692 if (ret < 0) {
693 pr_err("failed to initialize channels\n");
694 ret = -ETIMEDOUT;
695 goto out_unmap_reports;
696 }
697
698 ps3vram_cache_init(&ps3vram_mtd);
699
700 if (add_mtd_device(&ps3vram_mtd)) {
701 pr_err("ps3vram: failed to register device\n");
702 ret = -EAGAIN;
703 goto out_cache_cleanup;
704 }
705
706 pr_info("ps3vram mtd device registered, %lu bytes\n", ddr_size);
707 return 0;
708
709out_cache_cleanup:
710 ps3vram_cache_cleanup(&ps3vram_mtd);
711out_unmap_reports:
712 iounmap(priv->reports);
713out_unmap_ctrl:
714 iounmap(priv->ctrl);
715out_unmap_vram:
716 iounmap(priv->base);
717out_free_context:
718 lv1_gpu_context_free(priv->context_handle);
719out_free_memory:
720 lv1_gpu_memory_free(priv->memory_handle);
721out_close_gpu:
722 ps3_close_hv_device(dev);
723out_free_xdr_buf:
724 free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
725out_free_priv:
726 kfree(ps3vram_mtd.priv);
727 ps3vram_mtd.priv = NULL;
728out:
729 return ret;
730}
731
732static int ps3vram_shutdown(struct ps3_system_bus_device *dev)
733{
734 struct ps3vram_priv *priv;
735
736 priv = ps3vram_mtd.priv;
737
738 del_mtd_device(&ps3vram_mtd);
739 ps3vram_cache_cleanup(&ps3vram_mtd);
740 iounmap(priv->reports);
741 iounmap(priv->ctrl);
742 iounmap(priv->base);
743 lv1_gpu_context_free(priv->context_handle);
744 lv1_gpu_memory_free(priv->memory_handle);
745 ps3_close_hv_device(dev);
746 free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
747 kfree(priv);
748 return 0;
749}
750
751static struct ps3_system_bus_driver ps3vram_driver = {
752 .match_id = PS3_MATCH_ID_GPU,
753 .match_sub_id = PS3_MATCH_SUB_ID_GPU_RAMDISK,
754 .core.name = DEVICE_NAME,
755 .core.owner = THIS_MODULE,
756 .probe = ps3vram_probe,
757 .remove = ps3vram_shutdown,
758 .shutdown = ps3vram_shutdown,
759};
760
761static int __init ps3vram_init(void)
762{
763 return ps3_system_bus_driver_register(&ps3vram_driver);
764}
765
766static void __exit ps3vram_exit(void)
767{
768 ps3_system_bus_driver_unregister(&ps3vram_driver);
769}
770
771module_init(ps3vram_init);
772module_exit(ps3vram_exit);
773
774MODULE_LICENSE("GPL");
775MODULE_AUTHOR("Jim Paris <jim@jtan.com>");
776MODULE_DESCRIPTION("MTD driver for PS3 video RAM");