2 * SPU file system -- file contents
4 * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
6 * Author: Arnd Bergmann <arndb@de.ibm.com>
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)
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.
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.
24 #include <linux/ioctl.h>
25 #include <linux/module.h>
26 #include <linux/pagemap.h>
27 #include <linux/poll.h>
28 #include <linux/ptrace.h>
31 #include <asm/semaphore.h>
33 #include <asm/uaccess.h>
39 spufs_mem_open(struct inode *inode, struct file *file)
41 struct spufs_inode_info *i = SPUFS_I(inode);
42 file->private_data = i->i_ctx;
43 file->f_mapping = i->i_ctx->local_store;
48 spufs_mem_read(struct file *file, char __user *buffer,
49 size_t size, loff_t *pos)
51 struct spu_context *ctx = file->private_data;
57 local_store = ctx->ops->get_ls(ctx);
58 ret = simple_read_from_buffer(buffer, size, pos, local_store, LS_SIZE);
65 spufs_mem_write(struct file *file, const char __user *buffer,
66 size_t size, loff_t *pos)
68 struct spu_context *ctx = file->private_data;
72 size = min_t(ssize_t, LS_SIZE - *pos, size);
79 local_store = ctx->ops->get_ls(ctx);
80 ret = copy_from_user(local_store + *pos - size,
81 buffer, size) ? -EFAULT : size;
87 #ifdef CONFIG_SPARSEMEM
89 spufs_mem_mmap_nopage(struct vm_area_struct *vma,
90 unsigned long address, int *type)
92 struct page *page = NOPAGE_SIGBUS;
94 struct spu_context *ctx = vma->vm_file->private_data;
95 unsigned long offset = address - vma->vm_start;
96 offset += vma->vm_pgoff << PAGE_SHIFT;
100 if (ctx->state == SPU_STATE_SAVED)
101 page = vmalloc_to_page(ctx->csa.lscsa->ls + offset);
103 page = pfn_to_page((ctx->spu->local_store_phys + offset)
109 *type = VM_FAULT_MINOR;
111 page_cache_get(page);
115 static struct vm_operations_struct spufs_mem_mmap_vmops = {
116 .nopage = spufs_mem_mmap_nopage,
120 spufs_mem_mmap(struct file *file, struct vm_area_struct *vma)
122 if (!(vma->vm_flags & VM_SHARED))
126 vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
129 vma->vm_ops = &spufs_mem_mmap_vmops;
134 static struct file_operations spufs_mem_fops = {
135 .open = spufs_mem_open,
136 .read = spufs_mem_read,
137 .write = spufs_mem_write,
138 .llseek = generic_file_llseek,
139 #ifdef CONFIG_SPARSEMEM
140 .mmap = spufs_mem_mmap,
145 spufs_regs_open(struct inode *inode, struct file *file)
147 struct spufs_inode_info *i = SPUFS_I(inode);
148 file->private_data = i->i_ctx;
153 spufs_regs_read(struct file *file, char __user *buffer,
154 size_t size, loff_t *pos)
156 struct spu_context *ctx = file->private_data;
157 struct spu_lscsa *lscsa = ctx->csa.lscsa;
160 spu_acquire_saved(ctx);
162 ret = simple_read_from_buffer(buffer, size, pos,
163 lscsa->gprs, sizeof lscsa->gprs);
170 spufs_regs_write(struct file *file, const char __user *buffer,
171 size_t size, loff_t *pos)
173 struct spu_context *ctx = file->private_data;
174 struct spu_lscsa *lscsa = ctx->csa.lscsa;
177 size = min_t(ssize_t, sizeof lscsa->gprs - *pos, size);
182 spu_acquire_saved(ctx);
184 ret = copy_from_user(lscsa->gprs + *pos - size,
185 buffer, size) ? -EFAULT : size;
191 static struct file_operations spufs_regs_fops = {
192 .open = spufs_regs_open,
193 .read = spufs_regs_read,
194 .write = spufs_regs_write,
195 .llseek = generic_file_llseek,
199 spufs_fpcr_read(struct file *file, char __user * buffer,
200 size_t size, loff_t * pos)
202 struct spu_context *ctx = file->private_data;
203 struct spu_lscsa *lscsa = ctx->csa.lscsa;
206 spu_acquire_saved(ctx);
208 ret = simple_read_from_buffer(buffer, size, pos,
209 &lscsa->fpcr, sizeof(lscsa->fpcr));
216 spufs_fpcr_write(struct file *file, const char __user * buffer,
217 size_t size, loff_t * pos)
219 struct spu_context *ctx = file->private_data;
220 struct spu_lscsa *lscsa = ctx->csa.lscsa;
223 size = min_t(ssize_t, sizeof(lscsa->fpcr) - *pos, size);
228 spu_acquire_saved(ctx);
230 ret = copy_from_user((char *)&lscsa->fpcr + *pos - size,
231 buffer, size) ? -EFAULT : size;
237 static struct file_operations spufs_fpcr_fops = {
238 .open = spufs_regs_open,
239 .read = spufs_fpcr_read,
240 .write = spufs_fpcr_write,
241 .llseek = generic_file_llseek,
244 /* generic open function for all pipe-like files */
245 static int spufs_pipe_open(struct inode *inode, struct file *file)
247 struct spufs_inode_info *i = SPUFS_I(inode);
248 file->private_data = i->i_ctx;
250 return nonseekable_open(inode, file);
253 static ssize_t spufs_mbox_read(struct file *file, char __user *buf,
254 size_t len, loff_t *pos)
256 struct spu_context *ctx = file->private_data;
264 ret = ctx->ops->mbox_read(ctx, &mbox_data);
270 if (copy_to_user(buf, &mbox_data, sizeof mbox_data))
276 static struct file_operations spufs_mbox_fops = {
277 .open = spufs_pipe_open,
278 .read = spufs_mbox_read,
281 static ssize_t spufs_mbox_stat_read(struct file *file, char __user *buf,
282 size_t len, loff_t *pos)
284 struct spu_context *ctx = file->private_data;
292 mbox_stat = ctx->ops->mbox_stat_read(ctx) & 0xff;
296 if (copy_to_user(buf, &mbox_stat, sizeof mbox_stat))
302 static struct file_operations spufs_mbox_stat_fops = {
303 .open = spufs_pipe_open,
304 .read = spufs_mbox_stat_read,
307 /* low-level ibox access function */
308 size_t spu_ibox_read(struct spu_context *ctx, u32 *data)
310 return ctx->ops->ibox_read(ctx, data);
313 static int spufs_ibox_fasync(int fd, struct file *file, int on)
315 struct spu_context *ctx = file->private_data;
317 return fasync_helper(fd, file, on, &ctx->ibox_fasync);
320 /* interrupt-level ibox callback function. */
321 void spufs_ibox_callback(struct spu *spu)
323 struct spu_context *ctx = spu->ctx;
325 wake_up_all(&ctx->ibox_wq);
326 kill_fasync(&ctx->ibox_fasync, SIGIO, POLLIN);
329 static ssize_t spufs_ibox_read(struct file *file, char __user *buf,
330 size_t len, loff_t *pos)
332 struct spu_context *ctx = file->private_data;
342 if (file->f_flags & O_NONBLOCK) {
343 if (!spu_ibox_read(ctx, &ibox_data))
346 ret = spufs_wait(ctx->ibox_wq, spu_ibox_read(ctx, &ibox_data));
355 if (copy_to_user(buf, &ibox_data, sizeof ibox_data))
361 static unsigned int spufs_ibox_poll(struct file *file, poll_table *wait)
363 struct spu_context *ctx = file->private_data;
366 poll_wait(file, &ctx->ibox_wq, wait);
369 mask = ctx->ops->mbox_stat_poll(ctx, POLLIN | POLLRDNORM);
375 static struct file_operations spufs_ibox_fops = {
376 .open = spufs_pipe_open,
377 .read = spufs_ibox_read,
378 .poll = spufs_ibox_poll,
379 .fasync = spufs_ibox_fasync,
382 static ssize_t spufs_ibox_stat_read(struct file *file, char __user *buf,
383 size_t len, loff_t *pos)
385 struct spu_context *ctx = file->private_data;
392 ibox_stat = (ctx->ops->mbox_stat_read(ctx) >> 16) & 0xff;
395 if (copy_to_user(buf, &ibox_stat, sizeof ibox_stat))
401 static struct file_operations spufs_ibox_stat_fops = {
402 .open = spufs_pipe_open,
403 .read = spufs_ibox_stat_read,
406 /* low-level mailbox write */
407 size_t spu_wbox_write(struct spu_context *ctx, u32 data)
409 return ctx->ops->wbox_write(ctx, data);
412 static int spufs_wbox_fasync(int fd, struct file *file, int on)
414 struct spu_context *ctx = file->private_data;
417 ret = fasync_helper(fd, file, on, &ctx->wbox_fasync);
422 /* interrupt-level wbox callback function. */
423 void spufs_wbox_callback(struct spu *spu)
425 struct spu_context *ctx = spu->ctx;
427 wake_up_all(&ctx->wbox_wq);
428 kill_fasync(&ctx->wbox_fasync, SIGIO, POLLOUT);
431 static ssize_t spufs_wbox_write(struct file *file, const char __user *buf,
432 size_t len, loff_t *pos)
434 struct spu_context *ctx = file->private_data;
441 if (copy_from_user(&wbox_data, buf, sizeof wbox_data))
447 if (file->f_flags & O_NONBLOCK) {
448 if (!spu_wbox_write(ctx, wbox_data))
451 ret = spufs_wait(ctx->wbox_wq, spu_wbox_write(ctx, wbox_data));
456 return ret ? ret : sizeof wbox_data;
459 static unsigned int spufs_wbox_poll(struct file *file, poll_table *wait)
461 struct spu_context *ctx = file->private_data;
464 poll_wait(file, &ctx->wbox_wq, wait);
467 mask = ctx->ops->mbox_stat_poll(ctx, POLLOUT | POLLWRNORM);
473 static struct file_operations spufs_wbox_fops = {
474 .open = spufs_pipe_open,
475 .write = spufs_wbox_write,
476 .poll = spufs_wbox_poll,
477 .fasync = spufs_wbox_fasync,
480 static ssize_t spufs_wbox_stat_read(struct file *file, char __user *buf,
481 size_t len, loff_t *pos)
483 struct spu_context *ctx = file->private_data;
490 wbox_stat = (ctx->ops->mbox_stat_read(ctx) >> 8) & 0xff;
493 if (copy_to_user(buf, &wbox_stat, sizeof wbox_stat))
499 static struct file_operations spufs_wbox_stat_fops = {
500 .open = spufs_pipe_open,
501 .read = spufs_wbox_stat_read,
504 static ssize_t spufs_signal1_read(struct file *file, char __user *buf,
505 size_t len, loff_t *pos)
507 struct spu_context *ctx = file->private_data;
514 data = ctx->ops->signal1_read(ctx);
517 if (copy_to_user(buf, &data, 4))
523 static ssize_t spufs_signal1_write(struct file *file, const char __user *buf,
524 size_t len, loff_t *pos)
526 struct spu_context *ctx;
529 ctx = file->private_data;
534 if (copy_from_user(&data, buf, 4))
538 ctx->ops->signal1_write(ctx, data);
544 static struct file_operations spufs_signal1_fops = {
545 .open = spufs_pipe_open,
546 .read = spufs_signal1_read,
547 .write = spufs_signal1_write,
550 static ssize_t spufs_signal2_read(struct file *file, char __user *buf,
551 size_t len, loff_t *pos)
553 struct spu_context *ctx;
556 ctx = file->private_data;
562 data = ctx->ops->signal2_read(ctx);
565 if (copy_to_user(buf, &data, 4))
571 static ssize_t spufs_signal2_write(struct file *file, const char __user *buf,
572 size_t len, loff_t *pos)
574 struct spu_context *ctx;
577 ctx = file->private_data;
582 if (copy_from_user(&data, buf, 4))
586 ctx->ops->signal2_write(ctx, data);
592 static struct file_operations spufs_signal2_fops = {
593 .open = spufs_pipe_open,
594 .read = spufs_signal2_read,
595 .write = spufs_signal2_write,
598 static void spufs_signal1_type_set(void *data, u64 val)
600 struct spu_context *ctx = data;
603 ctx->ops->signal1_type_set(ctx, val);
607 static u64 spufs_signal1_type_get(void *data)
609 struct spu_context *ctx = data;
613 ret = ctx->ops->signal1_type_get(ctx);
618 DEFINE_SIMPLE_ATTRIBUTE(spufs_signal1_type, spufs_signal1_type_get,
619 spufs_signal1_type_set, "%llu");
621 static void spufs_signal2_type_set(void *data, u64 val)
623 struct spu_context *ctx = data;
626 ctx->ops->signal2_type_set(ctx, val);
630 static u64 spufs_signal2_type_get(void *data)
632 struct spu_context *ctx = data;
636 ret = ctx->ops->signal2_type_get(ctx);
641 DEFINE_SIMPLE_ATTRIBUTE(spufs_signal2_type, spufs_signal2_type_get,
642 spufs_signal2_type_set, "%llu");
644 static void spufs_npc_set(void *data, u64 val)
646 struct spu_context *ctx = data;
648 ctx->ops->npc_write(ctx, val);
652 static u64 spufs_npc_get(void *data)
654 struct spu_context *ctx = data;
657 ret = ctx->ops->npc_read(ctx);
661 DEFINE_SIMPLE_ATTRIBUTE(spufs_npc_ops, spufs_npc_get, spufs_npc_set, "%llx\n")
663 static void spufs_decr_set(void *data, u64 val)
665 struct spu_context *ctx = data;
666 struct spu_lscsa *lscsa = ctx->csa.lscsa;
667 spu_acquire_saved(ctx);
668 lscsa->decr.slot[0] = (u32) val;
672 static u64 spufs_decr_get(void *data)
674 struct spu_context *ctx = data;
675 struct spu_lscsa *lscsa = ctx->csa.lscsa;
677 spu_acquire_saved(ctx);
678 ret = lscsa->decr.slot[0];
682 DEFINE_SIMPLE_ATTRIBUTE(spufs_decr_ops, spufs_decr_get, spufs_decr_set,
685 static void spufs_decr_status_set(void *data, u64 val)
687 struct spu_context *ctx = data;
688 struct spu_lscsa *lscsa = ctx->csa.lscsa;
689 spu_acquire_saved(ctx);
690 lscsa->decr_status.slot[0] = (u32) val;
694 static u64 spufs_decr_status_get(void *data)
696 struct spu_context *ctx = data;
697 struct spu_lscsa *lscsa = ctx->csa.lscsa;
699 spu_acquire_saved(ctx);
700 ret = lscsa->decr_status.slot[0];
704 DEFINE_SIMPLE_ATTRIBUTE(spufs_decr_status_ops, spufs_decr_status_get,
705 spufs_decr_status_set, "%llx\n")
707 static void spufs_spu_tag_mask_set(void *data, u64 val)
709 struct spu_context *ctx = data;
710 struct spu_lscsa *lscsa = ctx->csa.lscsa;
711 spu_acquire_saved(ctx);
712 lscsa->tag_mask.slot[0] = (u32) val;
716 static u64 spufs_spu_tag_mask_get(void *data)
718 struct spu_context *ctx = data;
719 struct spu_lscsa *lscsa = ctx->csa.lscsa;
721 spu_acquire_saved(ctx);
722 ret = lscsa->tag_mask.slot[0];
726 DEFINE_SIMPLE_ATTRIBUTE(spufs_spu_tag_mask_ops, spufs_spu_tag_mask_get,
727 spufs_spu_tag_mask_set, "%llx\n")
729 static void spufs_event_mask_set(void *data, u64 val)
731 struct spu_context *ctx = data;
732 struct spu_lscsa *lscsa = ctx->csa.lscsa;
733 spu_acquire_saved(ctx);
734 lscsa->event_mask.slot[0] = (u32) val;
738 static u64 spufs_event_mask_get(void *data)
740 struct spu_context *ctx = data;
741 struct spu_lscsa *lscsa = ctx->csa.lscsa;
743 spu_acquire_saved(ctx);
744 ret = lscsa->event_mask.slot[0];
748 DEFINE_SIMPLE_ATTRIBUTE(spufs_event_mask_ops, spufs_event_mask_get,
749 spufs_event_mask_set, "%llx\n")
751 static void spufs_srr0_set(void *data, u64 val)
753 struct spu_context *ctx = data;
754 struct spu_lscsa *lscsa = ctx->csa.lscsa;
755 spu_acquire_saved(ctx);
756 lscsa->srr0.slot[0] = (u32) val;
760 static u64 spufs_srr0_get(void *data)
762 struct spu_context *ctx = data;
763 struct spu_lscsa *lscsa = ctx->csa.lscsa;
765 spu_acquire_saved(ctx);
766 ret = lscsa->srr0.slot[0];
770 DEFINE_SIMPLE_ATTRIBUTE(spufs_srr0_ops, spufs_srr0_get, spufs_srr0_set,
773 struct tree_descr spufs_dir_contents[] = {
774 { "mem", &spufs_mem_fops, 0666, },
775 { "regs", &spufs_regs_fops, 0666, },
776 { "mbox", &spufs_mbox_fops, 0444, },
777 { "ibox", &spufs_ibox_fops, 0444, },
778 { "wbox", &spufs_wbox_fops, 0222, },
779 { "mbox_stat", &spufs_mbox_stat_fops, 0444, },
780 { "ibox_stat", &spufs_ibox_stat_fops, 0444, },
781 { "wbox_stat", &spufs_wbox_stat_fops, 0444, },
782 { "signal1", &spufs_signal1_fops, 0666, },
783 { "signal2", &spufs_signal2_fops, 0666, },
784 { "signal1_type", &spufs_signal1_type, 0666, },
785 { "signal2_type", &spufs_signal2_type, 0666, },
786 { "npc", &spufs_npc_ops, 0666, },
787 { "fpcr", &spufs_fpcr_fops, 0666, },
788 { "decr", &spufs_decr_ops, 0666, },
789 { "decr_status", &spufs_decr_status_ops, 0666, },
790 { "spu_tag_mask", &spufs_spu_tag_mask_ops, 0666, },
791 { "event_mask", &spufs_event_mask_ops, 0666, },
792 { "srr0", &spufs_srr0_ops, 0666, },