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Merge branch 'stacktrace-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-block.git] / drivers / block / ps3vram.c
CommitLineData
f507cd22
GU		 1/*
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>
15
16#include <asm/firmware.h>
17#include <asm/lv1call.h>
18#include <asm/ps3.h>
19
20
21#define DEVICE_NAME "ps3vram"
22
23
24#define XDR_BUF_SIZE (2 * 1024 * 1024) /* XDR buffer (must be 1MiB aligned) */
25#define XDR_IOIF 0x0c000000
26
27#define FIFO_BASE XDR_IOIF
28#define FIFO_SIZE (64 * 1024)
29
30#define DMA_PAGE_SIZE (4 * 1024)
31
32#define CACHE_PAGE_SIZE (256 * 1024)
33#define CACHE_PAGE_COUNT ((XDR_BUF_SIZE - FIFO_SIZE) / CACHE_PAGE_SIZE)
34
35#define CACHE_OFFSET CACHE_PAGE_SIZE
36#define FIFO_OFFSET 0
37
38#define CTRL_PUT 0x10
39#define CTRL_GET 0x11
40#define CTRL_TOP 0x15
41
42#define UPLOAD_SUBCH 1
43#define DOWNLOAD_SUBCH 2
44
45#define NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN 0x0000030c
46#define NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY 0x00000104
47
48#define L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT 0x601
49
50#define CACHE_PAGE_PRESENT 1
51#define CACHE_PAGE_DIRTY 2
52
53struct ps3vram_tag {
54 unsigned int address;
55 unsigned int flags;
56};
57
58struct ps3vram_cache {
59 unsigned int page_count;
60 unsigned int page_size;
61 struct ps3vram_tag *tags;
62 unsigned int hit;
63 unsigned int miss;
64};
65
66struct ps3vram_priv {
67 struct request_queue *queue;
68 struct gendisk *gendisk;
69
70 u64 size;
71
72 u64 memory_handle;
73 u64 context_handle;
74 u32 *ctrl;
75 u32 *reports;
76 u8 __iomem *ddr_base;
77 u8 *xdr_buf;
78
79 u32 *fifo_base;
80 u32 *fifo_ptr;
81
82 struct ps3vram_cache cache;
83
84 /* Used to serialize cache/DMA operations */
85 struct mutex lock;
86};
87
88
89static int ps3vram_major;
90
91
92static struct block_device_operations ps3vram_fops = {
93 .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
106static u32 *ps3vram_get_notifier(u32 *reports, int notifier)
107{
108 return (void *)reports + DMA_NOTIFIER_OFFSET_BASE +
109 DMA_NOTIFIER_SIZE * notifier;
110}
111
112static void ps3vram_notifier_reset(struct ps3_system_bus_device *dev)
113{
114 struct ps3vram_priv *priv = dev->core.driver_data;
115 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{
125 struct ps3vram_priv *priv = dev->core.driver_data;
126 u32 *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
127 unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
128
129 do {
130 if (!notify[3])
131 return 0;
132 msleep(1);
133 } while (time_before(jiffies, timeout));
134
135 return -ETIMEDOUT;
136}
137
138static void ps3vram_init_ring(struct ps3_system_bus_device *dev)
139{
140 struct ps3vram_priv *priv = dev->core.driver_data;
141
142 priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET;
143 priv->ctrl[CTRL_GET] = FIFO_BASE + FIFO_OFFSET;
144}
145
146static int ps3vram_wait_ring(struct ps3_system_bus_device *dev,
147 unsigned int timeout_ms)
148{
149 struct ps3vram_priv *priv = dev->core.driver_data;
150 unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
151
152 do {
153 if (priv->ctrl[CTRL_PUT] == priv->ctrl[CTRL_GET])
154 return 0;
155 msleep(1);
156 } while (time_before(jiffies, timeout));
157
158 dev_warn(&dev->core, "FIFO timeout (%08x/%08x/%08x)\n",
159 priv->ctrl[CTRL_PUT], priv->ctrl[CTRL_GET],
160 priv->ctrl[CTRL_TOP]);
161
162 return -ETIMEDOUT;
163}
164
165static void ps3vram_out_ring(struct ps3vram_priv *priv, u32 data)
166{
167 *(priv->fifo_ptr)++ = data;
168}
169
170static void ps3vram_begin_ring(struct ps3vram_priv *priv, u32 chan, u32 tag,
171 u32 size)
172{
173 ps3vram_out_ring(priv, (size << 18) | (chan << 13) | tag);
174}
175
176static void ps3vram_rewind_ring(struct ps3_system_bus_device *dev)
177{
178 struct ps3vram_priv *priv = dev->core.driver_data;
179 int status;
180
181 ps3vram_out_ring(priv, 0x20000000 | (FIFO_BASE + FIFO_OFFSET));
182
183 priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET;
184
185 /* asking the HV for a blit will kick the FIFO */
186 status = lv1_gpu_context_attribute(priv->context_handle,
187 L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT, 0,
188 0, 0, 0);
189 if (status)
190 dev_err(&dev->core,
191 "%s: lv1_gpu_context_attribute failed %d\n", __func__,
192 status);
193
194 priv->fifo_ptr = priv->fifo_base;
195}
196
197static void ps3vram_fire_ring(struct ps3_system_bus_device *dev)
198{
199 struct ps3vram_priv *priv = dev->core.driver_data;
200 int status;
201
202 mutex_lock(&ps3_gpu_mutex);
203
204 priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET +
205 (priv->fifo_ptr - priv->fifo_base) * sizeof(u32);
206
207 /* asking the HV for a blit will kick the FIFO */
208 status = lv1_gpu_context_attribute(priv->context_handle,
209 L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT, 0,
210 0, 0, 0);
211 if (status)
212 dev_err(&dev->core,
213 "%s: lv1_gpu_context_attribute failed %d\n", __func__,
214 status);
215
216 if ((priv->fifo_ptr - priv->fifo_base) * sizeof(u32) >
217 FIFO_SIZE - 1024) {
218 dev_dbg(&dev->core, "FIFO full, rewinding\n");
219 ps3vram_wait_ring(dev, 200);
220 ps3vram_rewind_ring(dev);
221 }
222
223 mutex_unlock(&ps3_gpu_mutex);
224}
225
226static void ps3vram_bind(struct ps3_system_bus_device *dev)
227{
228 struct ps3vram_priv *priv = dev->core.driver_data;
229
230 ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0, 1);
231 ps3vram_out_ring(priv, 0x31337303);
232 ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x180, 3);
233 ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
234 ps3vram_out_ring(priv, 0xfeed0001); /* DMA system RAM instance */
235 ps3vram_out_ring(priv, 0xfeed0000); /* DMA video RAM instance */
236
237 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0, 1);
238 ps3vram_out_ring(priv, 0x3137c0de);
239 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x180, 3);
240 ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
241 ps3vram_out_ring(priv, 0xfeed0000); /* DMA video RAM instance */
242 ps3vram_out_ring(priv, 0xfeed0001); /* DMA system RAM instance */
243
244 ps3vram_fire_ring(dev);
245}
246
247static int ps3vram_upload(struct ps3_system_bus_device *dev,
248 unsigned int src_offset, unsigned int dst_offset,
249 int len, int count)
250{
251 struct ps3vram_priv *priv = dev->core.driver_data;
252
253 ps3vram_begin_ring(priv, UPLOAD_SUBCH,
254 NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
255 ps3vram_out_ring(priv, XDR_IOIF + src_offset);
256 ps3vram_out_ring(priv, dst_offset);
257 ps3vram_out_ring(priv, len);
258 ps3vram_out_ring(priv, len);
259 ps3vram_out_ring(priv, len);
260 ps3vram_out_ring(priv, count);
261 ps3vram_out_ring(priv, (1 << 8) | 1);
262 ps3vram_out_ring(priv, 0);
263
264 ps3vram_notifier_reset(dev);
265 ps3vram_begin_ring(priv, UPLOAD_SUBCH,
266 NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
267 ps3vram_out_ring(priv, 0);
268 ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x100, 1);
269 ps3vram_out_ring(priv, 0);
270 ps3vram_fire_ring(dev);
271 if (ps3vram_notifier_wait(dev, 200) < 0) {
272 dev_warn(&dev->core, "%s: Notifier timeout\n", __func__);
273 return -1;
274 }
275
276 return 0;
277}
278
279static int ps3vram_download(struct ps3_system_bus_device *dev,
280 unsigned int src_offset, unsigned int dst_offset,
281 int len, int count)
282{
283 struct ps3vram_priv *priv = dev->core.driver_data;
284
285 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
286 NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
287 ps3vram_out_ring(priv, src_offset);
288 ps3vram_out_ring(priv, XDR_IOIF + dst_offset);
289 ps3vram_out_ring(priv, len);
290 ps3vram_out_ring(priv, len);
291 ps3vram_out_ring(priv, len);
292 ps3vram_out_ring(priv, count);
293 ps3vram_out_ring(priv, (1 << 8) | 1);
294 ps3vram_out_ring(priv, 0);
295
296 ps3vram_notifier_reset(dev);
297 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
298 NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
299 ps3vram_out_ring(priv, 0);
300 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x100, 1);
301 ps3vram_out_ring(priv, 0);
302 ps3vram_fire_ring(dev);
303 if (ps3vram_notifier_wait(dev, 200) < 0) {
304 dev_warn(&dev->core, "%s: Notifier timeout\n", __func__);
305 return -1;
306 }
307
308 return 0;
309}
310
311static void ps3vram_cache_evict(struct ps3_system_bus_device *dev, int entry)
312{
313 struct ps3vram_priv *priv = dev->core.driver_data;
314 struct ps3vram_cache *cache = &priv->cache;
315
316 if (!(cache->tags[entry].flags & CACHE_PAGE_DIRTY))
317 return;
318
319 dev_dbg(&dev->core, "Flushing %d: 0x%08x\n", entry,
320 cache->tags[entry].address);
321 if (ps3vram_upload(dev, CACHE_OFFSET + entry * cache->page_size,
322 cache->tags[entry].address, DMA_PAGE_SIZE,
323 cache->page_size / DMA_PAGE_SIZE) < 0) {
324 dev_err(&dev->core,
325 "Failed to upload from 0x%x to " "0x%x size 0x%x\n",
326 entry * cache->page_size, cache->tags[entry].address,
327 cache->page_size);
328 }
329 cache->tags[entry].flags &= ~CACHE_PAGE_DIRTY;
330}
331
332static void ps3vram_cache_load(struct ps3_system_bus_device *dev, int entry,
333 unsigned int address)
334{
335 struct ps3vram_priv *priv = dev->core.driver_data;
336 struct ps3vram_cache *cache = &priv->cache;
337
338 dev_dbg(&dev->core, "Fetching %d: 0x%08x\n", entry, address);
339 if (ps3vram_download(dev, address,
340 CACHE_OFFSET + entry * cache->page_size,
341 DMA_PAGE_SIZE,
342 cache->page_size / DMA_PAGE_SIZE) < 0) {
343 dev_err(&dev->core,
344 "Failed to download from 0x%x to 0x%x size 0x%x\n",
345 address, entry * cache->page_size, cache->page_size);
346 }
347
348 cache->tags[entry].address = address;
349 cache->tags[entry].flags |= CACHE_PAGE_PRESENT;
350}
351
352
353static void ps3vram_cache_flush(struct ps3_system_bus_device *dev)
354{
355 struct ps3vram_priv *priv = dev->core.driver_data;
356 struct ps3vram_cache *cache = &priv->cache;
357 int i;
358
359 dev_dbg(&dev->core, "FLUSH\n");
360 for (i = 0; i < cache->page_count; i++) {
361 ps3vram_cache_evict(dev, i);
362 cache->tags[i].flags = 0;
363 }
364}
365
366static unsigned int ps3vram_cache_match(struct ps3_system_bus_device *dev,
367 loff_t address)
368{
369 struct ps3vram_priv *priv = dev->core.driver_data;
370 struct ps3vram_cache *cache = &priv->cache;
371 unsigned int base;
372 unsigned int offset;
373 int i;
374 static int counter;
375
376 offset = (unsigned int) (address & (cache->page_size - 1));
377 base = (unsigned int) (address - offset);
378
379 /* fully associative check */
380 for (i = 0; i < cache->page_count; i++) {
381 if ((cache->tags[i].flags & CACHE_PAGE_PRESENT) &&
382 cache->tags[i].address == base) {
383 cache->hit++;
384 dev_dbg(&dev->core, "Found entry %d: 0x%08x\n", i,
385 cache->tags[i].address);
386 return i;
387 }
388 }
389
390 /* choose a random entry */
391 i = (jiffies + (counter++)) % cache->page_count;
392 dev_dbg(&dev->core, "Using entry %d\n", i);
393
394 ps3vram_cache_evict(dev, i);
395 ps3vram_cache_load(dev, i, base);
396
397 cache->miss++;
398 return i;
399}
400
401static int ps3vram_cache_init(struct ps3_system_bus_device *dev)
402{
403 struct ps3vram_priv *priv = dev->core.driver_data;
404
405 priv->cache.page_count = CACHE_PAGE_COUNT;
406 priv->cache.page_size = CACHE_PAGE_SIZE;
407 priv->cache.tags = kzalloc(sizeof(struct ps3vram_tag) *
408 CACHE_PAGE_COUNT, GFP_KERNEL);
409 if (priv->cache.tags == NULL) {
410 dev_err(&dev->core, "Could not allocate cache tags\n");
411 return -ENOMEM;
412 }
413
414 dev_info(&dev->core, "Created ram cache: %d entries, %d KiB each\n",
415 CACHE_PAGE_COUNT, CACHE_PAGE_SIZE / 1024);
416
417 return 0;
418}
419
420static void ps3vram_cache_cleanup(struct ps3_system_bus_device *dev)
421{
422 struct ps3vram_priv *priv = dev->core.driver_data;
423
424 ps3vram_cache_flush(dev);
425 kfree(priv->cache.tags);
426}
427
428static int ps3vram_read(struct ps3_system_bus_device *dev, loff_t from,
429 size_t len, size_t *retlen, u_char *buf)
430{
431 struct ps3vram_priv *priv = dev->core.driver_data;
432 unsigned int cached, count;
433
434 dev_dbg(&dev->core, "%s: from=0x%08x len=0x%zx\n", __func__,
435 (unsigned int)from, len);
436
437 if (from >= priv->size)
438 return -EIO;
439
440 if (len > priv->size - from)
441 len = priv->size - from;
442
443 /* Copy from vram to buf */
444 count = len;
445 while (count) {
446 unsigned int offset, avail;
447 unsigned int entry;
448
449 offset = (unsigned int) (from & (priv->cache.page_size - 1));
450 avail = priv->cache.page_size - offset;
451
452 mutex_lock(&priv->lock);
453
454 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
465 mutex_unlock(&priv->lock);
466
467 buf += avail;
468 count -= avail;
469 from += avail;
470 }
471
472 *retlen = len;
473 return 0;
474}
475
476static int ps3vram_write(struct ps3_system_bus_device *dev, loff_t to,
477 size_t len, size_t *retlen, const u_char *buf)
478{
479 struct ps3vram_priv *priv = dev->core.driver_data;
480 unsigned int cached, count;
481
482 if (to >= priv->size)
483 return -EIO;
484
485 if (len > priv->size - to)
486 len = priv->size - to;
487
488 /* Copy from buf to vram */
489 count = len;
490 while (count) {
491 unsigned int offset, avail;
492 unsigned int entry;
493
494 offset = (unsigned int) (to & (priv->cache.page_size - 1));
495 avail = priv->cache.page_size - offset;
496
497 mutex_lock(&priv->lock);
498
499 entry = ps3vram_cache_match(dev, to);
500 cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
501
502 dev_dbg(&dev->core, "%s: to=%08x cached=%08x offset=%08x "
503 "avail=%08x count=%08x\n", __func__, (unsigned int)to,
504 cached, offset, avail, count);
505
506 if (avail > count)
507 avail = count;
508 memcpy(priv->xdr_buf + cached, buf, avail);
509
510 priv->cache.tags[entry].flags |= CACHE_PAGE_DIRTY;
511
512 mutex_unlock(&priv->lock);
513
514 buf += avail;
515 count -= avail;
516 to += avail;
517 }
518
519 *retlen = len;
520 return 0;
521}
522
523static int ps3vram_proc_show(struct seq_file *m, void *v)
524{
525 struct ps3vram_priv *priv = m->private;
526
527 seq_printf(m, "hit:%u\nmiss:%u\n", priv->cache.hit, priv->cache.miss);
528 return 0;
529}
530
531static int ps3vram_proc_open(struct inode *inode, struct file *file)
532{
533 return single_open(file, ps3vram_proc_show, PDE(inode)->data);
534}
535
536static const struct file_operations ps3vram_proc_fops = {
537 .owner = THIS_MODULE,
538 .open = ps3vram_proc_open,
539 .read = seq_read,
540 .llseek = seq_lseek,
541 .release = single_release,
542};
543
544static void __devinit ps3vram_proc_init(struct ps3_system_bus_device *dev)
545{
546 struct ps3vram_priv *priv = dev->core.driver_data;
547 struct proc_dir_entry *pde;
548
549 pde = proc_create(DEVICE_NAME, 0444, NULL, &ps3vram_proc_fops);
550 if (!pde) {
551 dev_warn(&dev->core, "failed to create /proc entry\n");
552 return;
553 }
f507cd22
GU		 554 pde->data = priv;
555}
556
557static int ps3vram_make_request(struct request_queue *q, struct bio *bio)
558{
559 struct ps3_system_bus_device *dev = q->queuedata;
560 int write = bio_data_dir(bio) == WRITE;
561 const char *op = write ? "write" : "read";
562 loff_t offset = bio->bi_sector << 9;
563 int error = 0;
564 struct bio_vec *bvec;
565 unsigned int i;
566
567 dev_dbg(&dev->core, "%s\n", __func__);
568
569 bio_for_each_segment(bvec, bio, i) {
570 /* PS3 is ppc64, so we don't handle highmem */
571 char *ptr = page_address(bvec->bv_page) + bvec->bv_offset;
572 size_t len = bvec->bv_len, retlen;
573
574 dev_dbg(&dev->core, " %s %zu bytes at offset %llu\n", op,
575 len, offset);
576 if (write)
577 error = ps3vram_write(dev, offset, len, &retlen, ptr);
578 else
579 error = ps3vram_read(dev, offset, len, &retlen, ptr);
580
581 if (error) {
582 dev_err(&dev->core, "%s failed\n", op);
583 goto out;
584 }
585
586 if (retlen != len) {
587 dev_err(&dev->core, "Short %s\n", op);
588 goto out;
589 }
590
591 offset += len;
592 }
593
594 dev_dbg(&dev->core, "%s completed\n", op);
595
596out:
597 bio_endio(bio, error);
598 return 0;
599}
600
601static int __devinit ps3vram_probe(struct ps3_system_bus_device *dev)
602{
603 struct ps3vram_priv *priv;
604 int error, status;
605 struct request_queue *queue;
606 struct gendisk *gendisk;
607 u64 ddr_lpar, ctrl_lpar, info_lpar, reports_lpar, ddr_size,
608 reports_size;
609 char *rest;
610
611 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
612 if (!priv) {
613 error = -ENOMEM;
614 goto fail;
615 }
616
617 mutex_init(&priv->lock);
618 dev->core.driver_data = priv;
619
620 priv = dev->core.driver_data;
621
622 /* Allocate XDR buffer (1MiB aligned) */
623 priv->xdr_buf = (void *)__get_free_pages(GFP_KERNEL,
624 get_order(XDR_BUF_SIZE));
625 if (priv->xdr_buf == NULL) {
626 dev_err(&dev->core, "Could not allocate XDR buffer\n");
627 error = -ENOMEM;
628 goto fail_free_priv;
629 }
630
631 /* Put FIFO at begginning of XDR buffer */
632 priv->fifo_base = (u32 *) (priv->xdr_buf + FIFO_OFFSET);
633 priv->fifo_ptr = priv->fifo_base;
634
635 /* XXX: Need to open GPU, in case ps3fb or snd_ps3 aren't loaded */
636 if (ps3_open_hv_device(dev)) {
637 dev_err(&dev->core, "ps3_open_hv_device failed\n");
638 error = -EAGAIN;
639 goto out_close_gpu;
640 }
641
642 /* Request memory */
643 status = -1;
644 ddr_size = ALIGN(memparse(size, &rest), 1024*1024);
645 if (!ddr_size) {
646 dev_err(&dev->core, "Specified size is too small\n");
647 error = -EINVAL;
648 goto out_close_gpu;
649 }
650
651 while (ddr_size > 0) {
652 status = lv1_gpu_memory_allocate(ddr_size, 0, 0, 0, 0,
653 &priv->memory_handle,
654 &ddr_lpar);
655 if (!status)
656 break;
657 ddr_size -= 1024*1024;
658 }
659 if (status) {
660 dev_err(&dev->core, "lv1_gpu_memory_allocate failed %d\n",
661 status);
662 error = -ENOMEM;
663 goto out_free_xdr_buf;
664 }
665
666 /* Request context */
667 status = lv1_gpu_context_allocate(priv->memory_handle, 0,
668 &priv->context_handle, &ctrl_lpar,
669 &info_lpar, &reports_lpar,
670 &reports_size);
671 if (status) {
672 dev_err(&dev->core, "lv1_gpu_context_allocate failed %d\n",
673 status);
674 error = -ENOMEM;
675 goto out_free_memory;
676 }
677
678 /* Map XDR buffer to RSX */
679 status = lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF,
680 ps3_mm_phys_to_lpar(__pa(priv->xdr_buf)),
681 XDR_BUF_SIZE, 0);
682 if (status) {
683 dev_err(&dev->core, "lv1_gpu_context_iomap failed %d\n",
684 status);
685 error = -ENOMEM;
686 goto out_free_context;
687 }
688
689 priv->ddr_base = ioremap_flags(ddr_lpar, ddr_size, _PAGE_NO_CACHE);
690
691 if (!priv->ddr_base) {
692 dev_err(&dev->core, "ioremap DDR failed\n");
693 error = -ENOMEM;
694 goto out_free_context;
695 }
696
697 priv->ctrl = ioremap(ctrl_lpar, 64 * 1024);
698 if (!priv->ctrl) {
699 dev_err(&dev->core, "ioremap CTRL failed\n");
700 error = -ENOMEM;
701 goto out_unmap_vram;
702 }
703
704 priv->reports = ioremap(reports_lpar, reports_size);
705 if (!priv->reports) {
706 dev_err(&dev->core, "ioremap REPORTS failed\n");
707 error = -ENOMEM;
708 goto out_unmap_ctrl;
709 }
710
711 mutex_lock(&ps3_gpu_mutex);
712 ps3vram_init_ring(dev);
713 mutex_unlock(&ps3_gpu_mutex);
714
715 priv->size = ddr_size;
716
717 ps3vram_bind(dev);
718
719 mutex_lock(&ps3_gpu_mutex);
720 error = ps3vram_wait_ring(dev, 100);
721 mutex_unlock(&ps3_gpu_mutex);
722 if (error < 0) {
723 dev_err(&dev->core, "Failed to initialize channels\n");
724 error = -ETIMEDOUT;
725 goto out_unmap_reports;
726 }
727
728 ps3vram_cache_init(dev);
729 ps3vram_proc_init(dev);
730
731 queue = blk_alloc_queue(GFP_KERNEL);
732 if (!queue) {
733 dev_err(&dev->core, "blk_alloc_queue failed\n");
734 error = -ENOMEM;
735 goto out_cache_cleanup;
736 }
737
738 priv->queue = queue;
739 queue->queuedata = dev;
740 blk_queue_make_request(queue, ps3vram_make_request);
741 blk_queue_max_phys_segments(queue, MAX_PHYS_SEGMENTS);
742 blk_queue_max_hw_segments(queue, MAX_HW_SEGMENTS);
743 blk_queue_max_segment_size(queue, MAX_SEGMENT_SIZE);
744 blk_queue_max_sectors(queue, SAFE_MAX_SECTORS);
745
746 gendisk = alloc_disk(1);
747 if (!gendisk) {
748 dev_err(&dev->core, "alloc_disk failed\n");
749 error = -ENOMEM;
750 goto fail_cleanup_queue;
751 }
752
753 priv->gendisk = gendisk;
754 gendisk->major = ps3vram_major;
755 gendisk->first_minor = 0;
756 gendisk->fops = &ps3vram_fops;
757 gendisk->queue = queue;
758 gendisk->private_data = dev;
759 gendisk->driverfs_dev = &dev->core;
760 strlcpy(gendisk->disk_name, DEVICE_NAME, sizeof(gendisk->disk_name));
761 set_capacity(gendisk, priv->size >> 9);
762
763 dev_info(&dev->core, "%s: Using %lu MiB of GPU memory\n",
764 gendisk->disk_name, get_capacity(gendisk) >> 11);
765
766 add_disk(gendisk);
767 return 0;
768
769fail_cleanup_queue:
770 blk_cleanup_queue(queue);
771out_cache_cleanup:
772 remove_proc_entry(DEVICE_NAME, NULL);
773 ps3vram_cache_cleanup(dev);
774out_unmap_reports:
775 iounmap(priv->reports);
776out_unmap_ctrl:
777 iounmap(priv->ctrl);
778out_unmap_vram:
779 iounmap(priv->ddr_base);
780out_free_context:
781 lv1_gpu_context_free(priv->context_handle);
782out_free_memory:
783 lv1_gpu_memory_free(priv->memory_handle);
784out_close_gpu:
785 ps3_close_hv_device(dev);
786out_free_xdr_buf:
787 free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
788fail_free_priv:
789 kfree(priv);
790 dev->core.driver_data = NULL;
791fail:
792 return error;
793}
794
795static int ps3vram_remove(struct ps3_system_bus_device *dev)
796{
797 struct ps3vram_priv *priv = dev->core.driver_data;
798
799 del_gendisk(priv->gendisk);
800 put_disk(priv->gendisk);
801 blk_cleanup_queue(priv->queue);
802 remove_proc_entry(DEVICE_NAME, NULL);
803 ps3vram_cache_cleanup(dev);
804 iounmap(priv->reports);
805 iounmap(priv->ctrl);
806 iounmap(priv->ddr_base);
807 lv1_gpu_context_free(priv->context_handle);
808 lv1_gpu_memory_free(priv->memory_handle);
809 ps3_close_hv_device(dev);
810 free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
811 kfree(priv);
812 dev->core.driver_data = NULL;
813 return 0;
814}
815
816static struct ps3_system_bus_driver ps3vram = {
817 .match_id = PS3_MATCH_ID_GPU,
818 .match_sub_id = PS3_MATCH_SUB_ID_GPU_RAMDISK,
819 .core.name = DEVICE_NAME,
820 .core.owner = THIS_MODULE,
821 .probe = ps3vram_probe,
822 .remove = ps3vram_remove,
823 .shutdown = ps3vram_remove,
824};
825
826
827static int __init ps3vram_init(void)
828{
829 int error;
830
831 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
832 return -ENODEV;
833
834 error = register_blkdev(0, DEVICE_NAME);
835 if (error <= 0) {
836 pr_err("%s: register_blkdev failed %d\n", DEVICE_NAME, error);
837 return error;
838 }
839 ps3vram_major = error;
840
841 pr_info("%s: registered block device major %d\n", DEVICE_NAME,
842 ps3vram_major);
843
844 error = ps3_system_bus_driver_register(&ps3vram);
845 if (error)
846 unregister_blkdev(ps3vram_major, DEVICE_NAME);
847
848 return error;
849}
850
851static void __exit ps3vram_exit(void)
852{
853 ps3_system_bus_driver_unregister(&ps3vram);
854 unregister_blkdev(ps3vram_major, DEVICE_NAME);
855}
856
857module_init(ps3vram_init);
858module_exit(ps3vram_exit);
859
860MODULE_LICENSE("GPL");
861MODULE_DESCRIPTION("PS3 Video RAM Storage Driver");
862MODULE_AUTHOR("Sony Corporation");
863MODULE_ALIAS(PS3_MODULE_ALIAS_GPU_RAMDISK);
Linux 6.x block layer and io_uring tree(s)