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67207b96 AB |
1 | /* |
2 | * SPU file system -- file contents | |
3 | * | |
4 | * (C) Copyright IBM Deutschland Entwicklung GmbH 2005 | |
5 | * | |
6 | * Author: Arnd Bergmann <arndb@de.ibm.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2, or (at your option) | |
11 | * any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | */ | |
22 | ||
23 | #include <linux/fs.h> | |
24 | #include <linux/ioctl.h> | |
25 | #include <linux/module.h> | |
26 | #include <linux/poll.h> | |
27 | ||
28 | #include <asm/io.h> | |
29 | #include <asm/semaphore.h> | |
30 | #include <asm/spu.h> | |
31 | #include <asm/uaccess.h> | |
32 | ||
33 | #include "spufs.h" | |
34 | ||
35 | static int | |
36 | spufs_mem_open(struct inode *inode, struct file *file) | |
37 | { | |
38 | struct spufs_inode_info *i = SPUFS_I(inode); | |
39 | file->private_data = i->i_ctx; | |
40 | return 0; | |
41 | } | |
42 | ||
43 | static ssize_t | |
44 | spufs_mem_read(struct file *file, char __user *buffer, | |
45 | size_t size, loff_t *pos) | |
46 | { | |
47 | struct spu *spu; | |
48 | struct spu_context *ctx; | |
49 | int ret; | |
50 | ||
51 | ctx = file->private_data; | |
52 | spu = ctx->spu; | |
53 | ||
54 | down_read(&ctx->backing_sema); | |
55 | if (spu->number & 0/*1*/) { | |
56 | ret = generic_file_read(file, buffer, size, pos); | |
57 | goto out; | |
58 | } | |
59 | ||
60 | ret = simple_read_from_buffer(buffer, size, pos, | |
61 | spu->local_store, LS_SIZE); | |
62 | out: | |
63 | up_read(&ctx->backing_sema); | |
64 | return ret; | |
65 | } | |
66 | ||
67 | static ssize_t | |
68 | spufs_mem_write(struct file *file, const char __user *buffer, | |
69 | size_t size, loff_t *pos) | |
70 | { | |
71 | struct spu_context *ctx = file->private_data; | |
72 | struct spu *spu = ctx->spu; | |
73 | ||
74 | if (spu->number & 0) //1) | |
75 | return generic_file_write(file, buffer, size, pos); | |
76 | ||
77 | size = min_t(ssize_t, LS_SIZE - *pos, size); | |
78 | if (size <= 0) | |
79 | return -EFBIG; | |
80 | *pos += size; | |
81 | return copy_from_user(spu->local_store + *pos - size, | |
82 | buffer, size) ? -EFAULT : size; | |
83 | } | |
84 | ||
85 | static int | |
86 | spufs_mem_mmap(struct file *file, struct vm_area_struct *vma) | |
87 | { | |
88 | struct spu_context *ctx = file->private_data; | |
89 | struct spu *spu = ctx->spu; | |
90 | unsigned long pfn; | |
91 | ||
92 | if (spu->number & 0) //1) | |
93 | return generic_file_mmap(file, vma); | |
94 | ||
95 | vma->vm_flags |= VM_RESERVED; | |
96 | vma->vm_page_prot = __pgprot(pgprot_val (vma->vm_page_prot) | |
97 | | _PAGE_NO_CACHE); | |
98 | pfn = spu->local_store_phys >> PAGE_SHIFT; | |
99 | /* | |
100 | * This will work for actual SPUs, but not for vmalloc memory: | |
101 | */ | |
102 | if (remap_pfn_range(vma, vma->vm_start, pfn, | |
103 | vma->vm_end-vma->vm_start, vma->vm_page_prot)) | |
104 | return -EAGAIN; | |
105 | return 0; | |
106 | } | |
107 | ||
108 | static struct file_operations spufs_mem_fops = { | |
109 | .open = spufs_mem_open, | |
110 | .read = spufs_mem_read, | |
111 | .write = spufs_mem_write, | |
112 | .mmap = spufs_mem_mmap, | |
113 | .llseek = generic_file_llseek, | |
114 | }; | |
115 | ||
116 | /* generic open function for all pipe-like files */ | |
117 | static int spufs_pipe_open(struct inode *inode, struct file *file) | |
118 | { | |
119 | struct spufs_inode_info *i = SPUFS_I(inode); | |
120 | file->private_data = i->i_ctx; | |
121 | ||
122 | return nonseekable_open(inode, file); | |
123 | } | |
124 | ||
125 | static ssize_t spufs_mbox_read(struct file *file, char __user *buf, | |
126 | size_t len, loff_t *pos) | |
127 | { | |
128 | struct spu_context *ctx; | |
129 | struct spu_problem __iomem *prob; | |
130 | u32 mbox_stat; | |
131 | u32 mbox_data; | |
132 | ||
133 | if (len < 4) | |
134 | return -EINVAL; | |
135 | ||
136 | ctx = file->private_data; | |
137 | prob = ctx->spu->problem; | |
138 | mbox_stat = in_be32(&prob->mb_stat_R); | |
139 | if (!(mbox_stat & 0x0000ff)) | |
140 | return -EAGAIN; | |
141 | ||
142 | mbox_data = in_be32(&prob->pu_mb_R); | |
143 | ||
144 | if (copy_to_user(buf, &mbox_data, sizeof mbox_data)) | |
145 | return -EFAULT; | |
146 | ||
147 | return 4; | |
148 | } | |
149 | ||
150 | static struct file_operations spufs_mbox_fops = { | |
151 | .open = spufs_pipe_open, | |
152 | .read = spufs_mbox_read, | |
153 | }; | |
154 | ||
155 | static ssize_t spufs_mbox_stat_read(struct file *file, char __user *buf, | |
156 | size_t len, loff_t *pos) | |
157 | { | |
158 | struct spu_context *ctx; | |
159 | u32 mbox_stat; | |
160 | ||
161 | if (len < 4) | |
162 | return -EINVAL; | |
163 | ||
164 | ctx = file->private_data; | |
165 | mbox_stat = in_be32(&ctx->spu->problem->mb_stat_R) & 0xff; | |
166 | ||
167 | if (copy_to_user(buf, &mbox_stat, sizeof mbox_stat)) | |
168 | return -EFAULT; | |
169 | ||
170 | return 4; | |
171 | } | |
172 | ||
173 | static struct file_operations spufs_mbox_stat_fops = { | |
174 | .open = spufs_pipe_open, | |
175 | .read = spufs_mbox_stat_read, | |
176 | }; | |
177 | ||
178 | /* low-level ibox access function */ | |
179 | size_t spu_ibox_read(struct spu *spu, u32 *data) | |
180 | { | |
181 | int ret; | |
182 | ||
183 | spin_lock_irq(&spu->register_lock); | |
184 | ||
185 | if (in_be32(&spu->problem->mb_stat_R) & 0xff0000) { | |
186 | /* read the first available word */ | |
187 | *data = in_be64(&spu->priv2->puint_mb_R); | |
188 | ret = 4; | |
189 | } else { | |
190 | /* make sure we get woken up by the interrupt */ | |
191 | out_be64(&spu->priv1->int_mask_class2_RW, | |
192 | in_be64(&spu->priv1->int_mask_class2_RW) | 0x1); | |
193 | ret = 0; | |
194 | } | |
195 | ||
196 | spin_unlock_irq(&spu->register_lock); | |
197 | return ret; | |
198 | } | |
199 | EXPORT_SYMBOL(spu_ibox_read); | |
200 | ||
201 | static int spufs_ibox_fasync(int fd, struct file *file, int on) | |
202 | { | |
203 | struct spu_context *ctx; | |
204 | ctx = file->private_data; | |
205 | return fasync_helper(fd, file, on, &ctx->spu->ibox_fasync); | |
206 | } | |
207 | ||
208 | static ssize_t spufs_ibox_read(struct file *file, char __user *buf, | |
209 | size_t len, loff_t *pos) | |
210 | { | |
211 | struct spu_context *ctx; | |
212 | u32 ibox_data; | |
213 | ssize_t ret; | |
214 | ||
215 | if (len < 4) | |
216 | return -EINVAL; | |
217 | ||
218 | ctx = file->private_data; | |
219 | ||
220 | ret = 0; | |
221 | if (file->f_flags & O_NONBLOCK) { | |
222 | if (!spu_ibox_read(ctx->spu, &ibox_data)) | |
223 | ret = -EAGAIN; | |
224 | } else { | |
225 | ret = wait_event_interruptible(ctx->spu->ibox_wq, | |
226 | spu_ibox_read(ctx->spu, &ibox_data)); | |
227 | } | |
228 | ||
229 | if (ret) | |
230 | return ret; | |
231 | ||
232 | ret = 4; | |
233 | if (copy_to_user(buf, &ibox_data, sizeof ibox_data)) | |
234 | ret = -EFAULT; | |
235 | ||
236 | return ret; | |
237 | } | |
238 | ||
239 | static unsigned int spufs_ibox_poll(struct file *file, poll_table *wait) | |
240 | { | |
241 | struct spu_context *ctx; | |
242 | struct spu_problem __iomem *prob; | |
243 | u32 mbox_stat; | |
244 | unsigned int mask; | |
245 | ||
246 | ctx = file->private_data; | |
247 | prob = ctx->spu->problem; | |
248 | mbox_stat = in_be32(&prob->mb_stat_R); | |
249 | ||
250 | poll_wait(file, &ctx->spu->ibox_wq, wait); | |
251 | ||
252 | mask = 0; | |
253 | if (mbox_stat & 0xff0000) | |
254 | mask |= POLLIN | POLLRDNORM; | |
255 | ||
256 | return mask; | |
257 | } | |
258 | ||
259 | static struct file_operations spufs_ibox_fops = { | |
260 | .open = spufs_pipe_open, | |
261 | .read = spufs_ibox_read, | |
262 | .poll = spufs_ibox_poll, | |
263 | .fasync = spufs_ibox_fasync, | |
264 | }; | |
265 | ||
266 | static ssize_t spufs_ibox_stat_read(struct file *file, char __user *buf, | |
267 | size_t len, loff_t *pos) | |
268 | { | |
269 | struct spu_context *ctx; | |
270 | u32 ibox_stat; | |
271 | ||
272 | if (len < 4) | |
273 | return -EINVAL; | |
274 | ||
275 | ctx = file->private_data; | |
276 | ibox_stat = (in_be32(&ctx->spu->problem->mb_stat_R) >> 16) & 0xff; | |
277 | ||
278 | if (copy_to_user(buf, &ibox_stat, sizeof ibox_stat)) | |
279 | return -EFAULT; | |
280 | ||
281 | return 4; | |
282 | } | |
283 | ||
284 | static struct file_operations spufs_ibox_stat_fops = { | |
285 | .open = spufs_pipe_open, | |
286 | .read = spufs_ibox_stat_read, | |
287 | }; | |
288 | ||
289 | /* low-level mailbox write */ | |
290 | size_t spu_wbox_write(struct spu *spu, u32 data) | |
291 | { | |
292 | int ret; | |
293 | ||
294 | spin_lock_irq(&spu->register_lock); | |
295 | ||
296 | if (in_be32(&spu->problem->mb_stat_R) & 0x00ff00) { | |
297 | /* we have space to write wbox_data to */ | |
298 | out_be32(&spu->problem->spu_mb_W, data); | |
299 | ret = 4; | |
300 | } else { | |
301 | /* make sure we get woken up by the interrupt when space | |
302 | becomes available */ | |
303 | out_be64(&spu->priv1->int_mask_class2_RW, | |
304 | in_be64(&spu->priv1->int_mask_class2_RW) | 0x10); | |
305 | ret = 0; | |
306 | } | |
307 | ||
308 | spin_unlock_irq(&spu->register_lock); | |
309 | return ret; | |
310 | } | |
311 | EXPORT_SYMBOL(spu_wbox_write); | |
312 | ||
313 | static int spufs_wbox_fasync(int fd, struct file *file, int on) | |
314 | { | |
315 | struct spu_context *ctx; | |
316 | ctx = file->private_data; | |
317 | return fasync_helper(fd, file, on, &ctx->spu->wbox_fasync); | |
318 | } | |
319 | ||
320 | static ssize_t spufs_wbox_write(struct file *file, const char __user *buf, | |
321 | size_t len, loff_t *pos) | |
322 | { | |
323 | struct spu_context *ctx; | |
324 | u32 wbox_data; | |
325 | int ret; | |
326 | ||
327 | if (len < 4) | |
328 | return -EINVAL; | |
329 | ||
330 | ctx = file->private_data; | |
331 | ||
332 | if (copy_from_user(&wbox_data, buf, sizeof wbox_data)) | |
333 | return -EFAULT; | |
334 | ||
335 | ret = 0; | |
336 | if (file->f_flags & O_NONBLOCK) { | |
337 | if (!spu_wbox_write(ctx->spu, wbox_data)) | |
338 | ret = -EAGAIN; | |
339 | } else { | |
340 | ret = wait_event_interruptible(ctx->spu->wbox_wq, | |
341 | spu_wbox_write(ctx->spu, wbox_data)); | |
342 | } | |
343 | ||
344 | return ret ? ret : sizeof wbox_data; | |
345 | } | |
346 | ||
347 | static unsigned int spufs_wbox_poll(struct file *file, poll_table *wait) | |
348 | { | |
349 | struct spu_context *ctx; | |
350 | struct spu_problem __iomem *prob; | |
351 | u32 mbox_stat; | |
352 | unsigned int mask; | |
353 | ||
354 | ctx = file->private_data; | |
355 | prob = ctx->spu->problem; | |
356 | mbox_stat = in_be32(&prob->mb_stat_R); | |
357 | ||
358 | poll_wait(file, &ctx->spu->wbox_wq, wait); | |
359 | ||
360 | mask = 0; | |
361 | if (mbox_stat & 0x00ff00) | |
362 | mask = POLLOUT | POLLWRNORM; | |
363 | ||
364 | return mask; | |
365 | } | |
366 | ||
367 | static struct file_operations spufs_wbox_fops = { | |
368 | .open = spufs_pipe_open, | |
369 | .write = spufs_wbox_write, | |
370 | .poll = spufs_wbox_poll, | |
371 | .fasync = spufs_wbox_fasync, | |
372 | }; | |
373 | ||
374 | static ssize_t spufs_wbox_stat_read(struct file *file, char __user *buf, | |
375 | size_t len, loff_t *pos) | |
376 | { | |
377 | struct spu_context *ctx; | |
378 | u32 wbox_stat; | |
379 | ||
380 | if (len < 4) | |
381 | return -EINVAL; | |
382 | ||
383 | ctx = file->private_data; | |
384 | wbox_stat = (in_be32(&ctx->spu->problem->mb_stat_R) >> 8) & 0xff; | |
385 | ||
386 | if (copy_to_user(buf, &wbox_stat, sizeof wbox_stat)) | |
387 | return -EFAULT; | |
388 | ||
389 | return 4; | |
390 | } | |
391 | ||
392 | static struct file_operations spufs_wbox_stat_fops = { | |
393 | .open = spufs_pipe_open, | |
394 | .read = spufs_wbox_stat_read, | |
395 | }; | |
396 | ||
397 | long spufs_run_spu(struct file *file, struct spu_context *ctx, | |
398 | u32 *npc, u32 *status) | |
399 | { | |
400 | struct spu_problem __iomem *prob; | |
401 | int ret; | |
402 | ||
403 | if (file->f_flags & O_NONBLOCK) { | |
404 | ret = -EAGAIN; | |
405 | if (!down_write_trylock(&ctx->backing_sema)) | |
406 | goto out; | |
407 | } else { | |
408 | down_write(&ctx->backing_sema); | |
409 | } | |
410 | ||
411 | prob = ctx->spu->problem; | |
412 | out_be32(&prob->spu_npc_RW, *npc); | |
413 | ||
414 | ret = spu_run(ctx->spu); | |
415 | ||
416 | *status = in_be32(&prob->spu_status_R); | |
417 | *npc = in_be32(&prob->spu_npc_RW); | |
418 | ||
419 | up_write(&ctx->backing_sema); | |
420 | ||
421 | out: | |
422 | return ret; | |
423 | } | |
424 | ||
425 | static ssize_t spufs_signal1_read(struct file *file, char __user *buf, | |
426 | size_t len, loff_t *pos) | |
427 | { | |
428 | struct spu_context *ctx; | |
429 | struct spu_problem *prob; | |
430 | u32 data; | |
431 | ||
432 | ctx = file->private_data; | |
433 | prob = ctx->spu->problem; | |
434 | ||
435 | if (len < 4) | |
436 | return -EINVAL; | |
437 | ||
438 | data = in_be32(&prob->signal_notify1); | |
439 | if (copy_to_user(buf, &data, 4)) | |
440 | return -EFAULT; | |
441 | ||
442 | return 4; | |
443 | } | |
444 | ||
445 | static ssize_t spufs_signal1_write(struct file *file, const char __user *buf, | |
446 | size_t len, loff_t *pos) | |
447 | { | |
448 | struct spu_context *ctx; | |
449 | struct spu_problem *prob; | |
450 | u32 data; | |
451 | ||
452 | ctx = file->private_data; | |
453 | prob = ctx->spu->problem; | |
454 | ||
455 | if (len < 4) | |
456 | return -EINVAL; | |
457 | ||
458 | if (copy_from_user(&data, buf, 4)) | |
459 | return -EFAULT; | |
460 | ||
461 | out_be32(&prob->signal_notify1, data); | |
462 | ||
463 | return 4; | |
464 | } | |
465 | ||
466 | static struct file_operations spufs_signal1_fops = { | |
467 | .open = spufs_pipe_open, | |
468 | .read = spufs_signal1_read, | |
469 | .write = spufs_signal1_write, | |
470 | }; | |
471 | ||
472 | static ssize_t spufs_signal2_read(struct file *file, char __user *buf, | |
473 | size_t len, loff_t *pos) | |
474 | { | |
475 | struct spu_context *ctx; | |
476 | struct spu_problem *prob; | |
477 | u32 data; | |
478 | ||
479 | ctx = file->private_data; | |
480 | prob = ctx->spu->problem; | |
481 | ||
482 | if (len < 4) | |
483 | return -EINVAL; | |
484 | ||
485 | data = in_be32(&prob->signal_notify2); | |
486 | if (copy_to_user(buf, &data, 4)) | |
487 | return -EFAULT; | |
488 | ||
489 | return 4; | |
490 | } | |
491 | ||
492 | static ssize_t spufs_signal2_write(struct file *file, const char __user *buf, | |
493 | size_t len, loff_t *pos) | |
494 | { | |
495 | struct spu_context *ctx; | |
496 | struct spu_problem *prob; | |
497 | u32 data; | |
498 | ||
499 | ctx = file->private_data; | |
500 | prob = ctx->spu->problem; | |
501 | ||
502 | if (len < 4) | |
503 | return -EINVAL; | |
504 | ||
505 | if (copy_from_user(&data, buf, 4)) | |
506 | return -EFAULT; | |
507 | ||
508 | out_be32(&prob->signal_notify2, data); | |
509 | ||
510 | return 4; | |
511 | } | |
512 | ||
513 | static struct file_operations spufs_signal2_fops = { | |
514 | .open = spufs_pipe_open, | |
515 | .read = spufs_signal2_read, | |
516 | .write = spufs_signal2_write, | |
517 | }; | |
518 | ||
519 | static void spufs_signal1_type_set(void *data, u64 val) | |
520 | { | |
521 | struct spu_context *ctx = data; | |
522 | struct spu_priv2 *priv2 = ctx->spu->priv2; | |
523 | u64 tmp; | |
524 | ||
525 | spin_lock_irq(&ctx->spu->register_lock); | |
526 | tmp = in_be64(&priv2->spu_cfg_RW); | |
527 | if (val) | |
528 | tmp |= 1; | |
529 | else | |
530 | tmp &= ~1; | |
531 | out_be64(&priv2->spu_cfg_RW, tmp); | |
532 | spin_unlock_irq(&ctx->spu->register_lock); | |
533 | } | |
534 | ||
535 | static u64 spufs_signal1_type_get(void *data) | |
536 | { | |
537 | struct spu_context *ctx = data; | |
538 | return (in_be64(&ctx->spu->priv2->spu_cfg_RW) & 1) != 0; | |
539 | } | |
540 | DEFINE_SIMPLE_ATTRIBUTE(spufs_signal1_type, spufs_signal1_type_get, | |
541 | spufs_signal1_type_set, "%llu"); | |
542 | ||
543 | static void spufs_signal2_type_set(void *data, u64 val) | |
544 | { | |
545 | struct spu_context *ctx = data; | |
546 | struct spu_priv2 *priv2 = ctx->spu->priv2; | |
547 | u64 tmp; | |
548 | ||
549 | spin_lock_irq(&ctx->spu->register_lock); | |
550 | tmp = in_be64(&priv2->spu_cfg_RW); | |
551 | if (val) | |
552 | tmp |= 2; | |
553 | else | |
554 | tmp &= ~2; | |
555 | out_be64(&priv2->spu_cfg_RW, tmp); | |
556 | spin_unlock_irq(&ctx->spu->register_lock); | |
557 | } | |
558 | ||
559 | static u64 spufs_signal2_type_get(void *data) | |
560 | { | |
561 | struct spu_context *ctx = data; | |
562 | return (in_be64(&ctx->spu->priv2->spu_cfg_RW) & 2) != 0; | |
563 | } | |
564 | DEFINE_SIMPLE_ATTRIBUTE(spufs_signal2_type, spufs_signal2_type_get, | |
565 | spufs_signal2_type_set, "%llu"); | |
566 | ||
567 | static void spufs_npc_set(void *data, u64 val) | |
568 | { | |
569 | struct spu_context *ctx = data; | |
570 | out_be32(&ctx->spu->problem->spu_npc_RW, val); | |
571 | } | |
572 | ||
573 | static u64 spufs_npc_get(void *data) | |
574 | { | |
575 | struct spu_context *ctx = data; | |
576 | u64 ret; | |
577 | ret = in_be32(&ctx->spu->problem->spu_npc_RW); | |
578 | return ret; | |
579 | } | |
580 | DEFINE_SIMPLE_ATTRIBUTE(spufs_npc_ops, spufs_npc_get, spufs_npc_set, "%llx\n") | |
581 | ||
582 | struct tree_descr spufs_dir_contents[] = { | |
583 | { "mem", &spufs_mem_fops, 0666, }, | |
584 | { "mbox", &spufs_mbox_fops, 0444, }, | |
585 | { "ibox", &spufs_ibox_fops, 0444, }, | |
586 | { "wbox", &spufs_wbox_fops, 0222, }, | |
587 | { "mbox_stat", &spufs_mbox_stat_fops, 0444, }, | |
588 | { "ibox_stat", &spufs_ibox_stat_fops, 0444, }, | |
589 | { "wbox_stat", &spufs_wbox_stat_fops, 0444, }, | |
590 | { "signal1", &spufs_signal1_fops, 0666, }, | |
591 | { "signal2", &spufs_signal2_fops, 0666, }, | |
592 | { "signal1_type", &spufs_signal1_type, 0666, }, | |
593 | { "signal2_type", &spufs_signal2_type, 0666, }, | |
594 | { "npc", &spufs_npc_ops, 0666, }, | |
595 | {}, | |
596 | }; |