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.
26 #include <linux/ioctl.h>
27 #include <linux/module.h>
28 #include <linux/pagemap.h>
29 #include <linux/poll.h>
30 #include <linux/ptrace.h>
33 #include <asm/semaphore.h>
35 #include <asm/uaccess.h>
39 #define SPUFS_MMAP_4K (PAGE_SIZE == 0x1000)
43 spufs_mem_open(struct inode *inode, struct file *file)
45 struct spufs_inode_info *i = SPUFS_I(inode);
46 struct spu_context *ctx = i->i_ctx;
47 file->private_data = ctx;
48 file->f_mapping = inode->i_mapping;
49 ctx->local_store = inode->i_mapping;
54 spufs_mem_read(struct file *file, char __user *buffer,
55 size_t size, loff_t *pos)
57 struct spu_context *ctx = file->private_data;
63 local_store = ctx->ops->get_ls(ctx);
64 ret = simple_read_from_buffer(buffer, size, pos, local_store, LS_SIZE);
71 spufs_mem_write(struct file *file, const char __user *buffer,
72 size_t size, loff_t *pos)
74 struct spu_context *ctx = file->private_data;
78 size = min_t(ssize_t, LS_SIZE - *pos, size);
85 local_store = ctx->ops->get_ls(ctx);
86 ret = copy_from_user(local_store + *pos - size,
87 buffer, size) ? -EFAULT : size;
94 spufs_mem_mmap_nopage(struct vm_area_struct *vma,
95 unsigned long address, int *type)
97 struct page *page = NOPAGE_SIGBUS;
99 struct spu_context *ctx = vma->vm_file->private_data;
100 unsigned long offset = address - vma->vm_start;
101 offset += vma->vm_pgoff << PAGE_SHIFT;
105 if (ctx->state == SPU_STATE_SAVED) {
106 vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
107 & ~(_PAGE_NO_CACHE | _PAGE_GUARDED));
108 page = vmalloc_to_page(ctx->csa.lscsa->ls + offset);
110 vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
111 | _PAGE_NO_CACHE | _PAGE_GUARDED);
112 page = pfn_to_page((ctx->spu->local_store_phys + offset)
118 *type = VM_FAULT_MINOR;
120 page_cache_get(page);
124 static struct vm_operations_struct spufs_mem_mmap_vmops = {
125 .nopage = spufs_mem_mmap_nopage,
129 spufs_mem_mmap(struct file *file, struct vm_area_struct *vma)
131 if (!(vma->vm_flags & VM_SHARED))
135 vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
138 vma->vm_ops = &spufs_mem_mmap_vmops;
142 static struct file_operations spufs_mem_fops = {
143 .open = spufs_mem_open,
144 .read = spufs_mem_read,
145 .write = spufs_mem_write,
146 .llseek = generic_file_llseek,
147 .mmap = spufs_mem_mmap,
150 static struct page *spufs_ps_nopage(struct vm_area_struct *vma,
151 unsigned long address,
152 int *type, unsigned long ps_offs,
153 unsigned long ps_size)
155 struct page *page = NOPAGE_SIGBUS;
156 int fault_type = VM_FAULT_SIGBUS;
157 struct spu_context *ctx = vma->vm_file->private_data;
158 unsigned long offset = address - vma->vm_start;
162 offset += vma->vm_pgoff << PAGE_SHIFT;
163 if (offset >= ps_size)
166 ret = spu_acquire_runnable(ctx);
170 area = ctx->spu->problem_phys + ps_offs;
171 page = pfn_to_page((area + offset) >> PAGE_SHIFT);
172 fault_type = VM_FAULT_MINOR;
173 page_cache_get(page);
185 static struct page *spufs_cntl_mmap_nopage(struct vm_area_struct *vma,
186 unsigned long address, int *type)
188 return spufs_ps_nopage(vma, address, type, 0x4000, 0x1000);
191 static struct vm_operations_struct spufs_cntl_mmap_vmops = {
192 .nopage = spufs_cntl_mmap_nopage,
196 * mmap support for problem state control area [0x4000 - 0x4fff].
198 static int spufs_cntl_mmap(struct file *file, struct vm_area_struct *vma)
200 if (!(vma->vm_flags & VM_SHARED))
203 vma->vm_flags |= VM_RESERVED;
204 vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
205 | _PAGE_NO_CACHE | _PAGE_GUARDED);
207 vma->vm_ops = &spufs_cntl_mmap_vmops;
210 #else /* SPUFS_MMAP_4K */
211 #define spufs_cntl_mmap NULL
212 #endif /* !SPUFS_MMAP_4K */
214 static int spufs_cntl_open(struct inode *inode, struct file *file)
216 struct spufs_inode_info *i = SPUFS_I(inode);
217 struct spu_context *ctx = i->i_ctx;
219 file->private_data = ctx;
220 file->f_mapping = inode->i_mapping;
221 ctx->cntl = inode->i_mapping;
226 spufs_cntl_read(struct file *file, char __user *buffer,
227 size_t size, loff_t *pos)
229 /* FIXME: read from spu status */
234 spufs_cntl_write(struct file *file, const char __user *buffer,
235 size_t size, loff_t *pos)
237 /* FIXME: write to runctl bit */
241 static struct file_operations spufs_cntl_fops = {
242 .open = spufs_cntl_open,
243 .read = spufs_cntl_read,
244 .write = spufs_cntl_write,
245 .mmap = spufs_cntl_mmap,
249 spufs_regs_open(struct inode *inode, struct file *file)
251 struct spufs_inode_info *i = SPUFS_I(inode);
252 file->private_data = i->i_ctx;
257 spufs_regs_read(struct file *file, char __user *buffer,
258 size_t size, loff_t *pos)
260 struct spu_context *ctx = file->private_data;
261 struct spu_lscsa *lscsa = ctx->csa.lscsa;
264 spu_acquire_saved(ctx);
266 ret = simple_read_from_buffer(buffer, size, pos,
267 lscsa->gprs, sizeof lscsa->gprs);
274 spufs_regs_write(struct file *file, const char __user *buffer,
275 size_t size, loff_t *pos)
277 struct spu_context *ctx = file->private_data;
278 struct spu_lscsa *lscsa = ctx->csa.lscsa;
281 size = min_t(ssize_t, sizeof lscsa->gprs - *pos, size);
286 spu_acquire_saved(ctx);
288 ret = copy_from_user(lscsa->gprs + *pos - size,
289 buffer, size) ? -EFAULT : size;
295 static struct file_operations spufs_regs_fops = {
296 .open = spufs_regs_open,
297 .read = spufs_regs_read,
298 .write = spufs_regs_write,
299 .llseek = generic_file_llseek,
303 spufs_fpcr_read(struct file *file, char __user * buffer,
304 size_t size, loff_t * pos)
306 struct spu_context *ctx = file->private_data;
307 struct spu_lscsa *lscsa = ctx->csa.lscsa;
310 spu_acquire_saved(ctx);
312 ret = simple_read_from_buffer(buffer, size, pos,
313 &lscsa->fpcr, sizeof(lscsa->fpcr));
320 spufs_fpcr_write(struct file *file, const char __user * buffer,
321 size_t size, loff_t * pos)
323 struct spu_context *ctx = file->private_data;
324 struct spu_lscsa *lscsa = ctx->csa.lscsa;
327 size = min_t(ssize_t, sizeof(lscsa->fpcr) - *pos, size);
332 spu_acquire_saved(ctx);
334 ret = copy_from_user((char *)&lscsa->fpcr + *pos - size,
335 buffer, size) ? -EFAULT : size;
341 static struct file_operations spufs_fpcr_fops = {
342 .open = spufs_regs_open,
343 .read = spufs_fpcr_read,
344 .write = spufs_fpcr_write,
345 .llseek = generic_file_llseek,
348 /* generic open function for all pipe-like files */
349 static int spufs_pipe_open(struct inode *inode, struct file *file)
351 struct spufs_inode_info *i = SPUFS_I(inode);
352 file->private_data = i->i_ctx;
354 return nonseekable_open(inode, file);
358 * Read as many bytes from the mailbox as possible, until
359 * one of the conditions becomes true:
361 * - no more data available in the mailbox
362 * - end of the user provided buffer
363 * - end of the mapped area
365 static ssize_t spufs_mbox_read(struct file *file, char __user *buf,
366 size_t len, loff_t *pos)
368 struct spu_context *ctx = file->private_data;
369 u32 mbox_data, __user *udata;
375 if (!access_ok(VERIFY_WRITE, buf, len))
378 udata = (void __user *)buf;
381 for (count = 0; count <= len; count += 4, udata++) {
383 ret = ctx->ops->mbox_read(ctx, &mbox_data);
388 * at the end of the mapped area, we can fault
389 * but still need to return the data we have
390 * read successfully so far.
392 ret = __put_user(mbox_data, udata);
407 static struct file_operations spufs_mbox_fops = {
408 .open = spufs_pipe_open,
409 .read = spufs_mbox_read,
412 static ssize_t spufs_mbox_stat_read(struct file *file, char __user *buf,
413 size_t len, loff_t *pos)
415 struct spu_context *ctx = file->private_data;
423 mbox_stat = ctx->ops->mbox_stat_read(ctx) & 0xff;
427 if (copy_to_user(buf, &mbox_stat, sizeof mbox_stat))
433 static struct file_operations spufs_mbox_stat_fops = {
434 .open = spufs_pipe_open,
435 .read = spufs_mbox_stat_read,
438 /* low-level ibox access function */
439 size_t spu_ibox_read(struct spu_context *ctx, u32 *data)
441 return ctx->ops->ibox_read(ctx, data);
444 static int spufs_ibox_fasync(int fd, struct file *file, int on)
446 struct spu_context *ctx = file->private_data;
448 return fasync_helper(fd, file, on, &ctx->ibox_fasync);
451 /* interrupt-level ibox callback function. */
452 void spufs_ibox_callback(struct spu *spu)
454 struct spu_context *ctx = spu->ctx;
456 wake_up_all(&ctx->ibox_wq);
457 kill_fasync(&ctx->ibox_fasync, SIGIO, POLLIN);
461 * Read as many bytes from the interrupt mailbox as possible, until
462 * one of the conditions becomes true:
464 * - no more data available in the mailbox
465 * - end of the user provided buffer
466 * - end of the mapped area
468 * If the file is opened without O_NONBLOCK, we wait here until
469 * any data is available, but return when we have been able to
472 static ssize_t spufs_ibox_read(struct file *file, char __user *buf,
473 size_t len, loff_t *pos)
475 struct spu_context *ctx = file->private_data;
476 u32 ibox_data, __user *udata;
482 if (!access_ok(VERIFY_WRITE, buf, len))
485 udata = (void __user *)buf;
489 /* wait only for the first element */
491 if (file->f_flags & O_NONBLOCK) {
492 if (!spu_ibox_read(ctx, &ibox_data))
495 count = spufs_wait(ctx->ibox_wq, spu_ibox_read(ctx, &ibox_data));
500 /* if we can't write at all, return -EFAULT */
501 count = __put_user(ibox_data, udata);
505 for (count = 4, udata++; (count + 4) <= len; count += 4, udata++) {
507 ret = ctx->ops->ibox_read(ctx, &ibox_data);
511 * at the end of the mapped area, we can fault
512 * but still need to return the data we have
513 * read successfully so far.
515 ret = __put_user(ibox_data, udata);
526 static unsigned int spufs_ibox_poll(struct file *file, poll_table *wait)
528 struct spu_context *ctx = file->private_data;
531 poll_wait(file, &ctx->ibox_wq, wait);
534 mask = ctx->ops->mbox_stat_poll(ctx, POLLIN | POLLRDNORM);
540 static struct file_operations spufs_ibox_fops = {
541 .open = spufs_pipe_open,
542 .read = spufs_ibox_read,
543 .poll = spufs_ibox_poll,
544 .fasync = spufs_ibox_fasync,
547 static ssize_t spufs_ibox_stat_read(struct file *file, char __user *buf,
548 size_t len, loff_t *pos)
550 struct spu_context *ctx = file->private_data;
557 ibox_stat = (ctx->ops->mbox_stat_read(ctx) >> 16) & 0xff;
560 if (copy_to_user(buf, &ibox_stat, sizeof ibox_stat))
566 static struct file_operations spufs_ibox_stat_fops = {
567 .open = spufs_pipe_open,
568 .read = spufs_ibox_stat_read,
571 /* low-level mailbox write */
572 size_t spu_wbox_write(struct spu_context *ctx, u32 data)
574 return ctx->ops->wbox_write(ctx, data);
577 static int spufs_wbox_fasync(int fd, struct file *file, int on)
579 struct spu_context *ctx = file->private_data;
582 ret = fasync_helper(fd, file, on, &ctx->wbox_fasync);
587 /* interrupt-level wbox callback function. */
588 void spufs_wbox_callback(struct spu *spu)
590 struct spu_context *ctx = spu->ctx;
592 wake_up_all(&ctx->wbox_wq);
593 kill_fasync(&ctx->wbox_fasync, SIGIO, POLLOUT);
597 * Write as many bytes to the interrupt mailbox as possible, until
598 * one of the conditions becomes true:
600 * - the mailbox is full
601 * - end of the user provided buffer
602 * - end of the mapped area
604 * If the file is opened without O_NONBLOCK, we wait here until
605 * space is availabyl, but return when we have been able to
608 static ssize_t spufs_wbox_write(struct file *file, const char __user *buf,
609 size_t len, loff_t *pos)
611 struct spu_context *ctx = file->private_data;
612 u32 wbox_data, __user *udata;
618 udata = (void __user *)buf;
619 if (!access_ok(VERIFY_READ, buf, len))
622 if (__get_user(wbox_data, udata))
628 * make sure we can at least write one element, by waiting
629 * in case of !O_NONBLOCK
632 if (file->f_flags & O_NONBLOCK) {
633 if (!spu_wbox_write(ctx, wbox_data))
636 count = spufs_wait(ctx->wbox_wq, spu_wbox_write(ctx, wbox_data));
642 /* write aѕ much as possible */
643 for (count = 4, udata++; (count + 4) <= len; count += 4, udata++) {
645 ret = __get_user(wbox_data, udata);
649 ret = spu_wbox_write(ctx, wbox_data);
659 static unsigned int spufs_wbox_poll(struct file *file, poll_table *wait)
661 struct spu_context *ctx = file->private_data;
664 poll_wait(file, &ctx->wbox_wq, wait);
667 mask = ctx->ops->mbox_stat_poll(ctx, POLLOUT | POLLWRNORM);
673 static struct file_operations spufs_wbox_fops = {
674 .open = spufs_pipe_open,
675 .write = spufs_wbox_write,
676 .poll = spufs_wbox_poll,
677 .fasync = spufs_wbox_fasync,
680 static ssize_t spufs_wbox_stat_read(struct file *file, char __user *buf,
681 size_t len, loff_t *pos)
683 struct spu_context *ctx = file->private_data;
690 wbox_stat = (ctx->ops->mbox_stat_read(ctx) >> 8) & 0xff;
693 if (copy_to_user(buf, &wbox_stat, sizeof wbox_stat))
699 static struct file_operations spufs_wbox_stat_fops = {
700 .open = spufs_pipe_open,
701 .read = spufs_wbox_stat_read,
704 static int spufs_signal1_open(struct inode *inode, struct file *file)
706 struct spufs_inode_info *i = SPUFS_I(inode);
707 struct spu_context *ctx = i->i_ctx;
708 file->private_data = ctx;
709 file->f_mapping = inode->i_mapping;
710 ctx->signal1 = inode->i_mapping;
711 return nonseekable_open(inode, file);
714 static ssize_t spufs_signal1_read(struct file *file, char __user *buf,
715 size_t len, loff_t *pos)
717 struct spu_context *ctx = file->private_data;
724 data = ctx->ops->signal1_read(ctx);
727 if (copy_to_user(buf, &data, 4))
733 static ssize_t spufs_signal1_write(struct file *file, const char __user *buf,
734 size_t len, loff_t *pos)
736 struct spu_context *ctx;
739 ctx = file->private_data;
744 if (copy_from_user(&data, buf, 4))
748 ctx->ops->signal1_write(ctx, data);
754 static struct page *spufs_signal1_mmap_nopage(struct vm_area_struct *vma,
755 unsigned long address, int *type)
757 #if PAGE_SIZE == 0x1000
758 return spufs_ps_nopage(vma, address, type, 0x14000, 0x1000);
759 #elif PAGE_SIZE == 0x10000
760 /* For 64k pages, both signal1 and signal2 can be used to mmap the whole
761 * signal 1 and 2 area
763 return spufs_ps_nopage(vma, address, type, 0x10000, 0x10000);
765 #error unsupported page size
769 static struct vm_operations_struct spufs_signal1_mmap_vmops = {
770 .nopage = spufs_signal1_mmap_nopage,
773 static int spufs_signal1_mmap(struct file *file, struct vm_area_struct *vma)
775 if (!(vma->vm_flags & VM_SHARED))
778 vma->vm_flags |= VM_RESERVED;
779 vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
780 | _PAGE_NO_CACHE | _PAGE_GUARDED);
782 vma->vm_ops = &spufs_signal1_mmap_vmops;
786 static struct file_operations spufs_signal1_fops = {
787 .open = spufs_signal1_open,
788 .read = spufs_signal1_read,
789 .write = spufs_signal1_write,
790 .mmap = spufs_signal1_mmap,
793 static int spufs_signal2_open(struct inode *inode, struct file *file)
795 struct spufs_inode_info *i = SPUFS_I(inode);
796 struct spu_context *ctx = i->i_ctx;
797 file->private_data = ctx;
798 file->f_mapping = inode->i_mapping;
799 ctx->signal2 = inode->i_mapping;
800 return nonseekable_open(inode, file);
803 static ssize_t spufs_signal2_read(struct file *file, char __user *buf,
804 size_t len, loff_t *pos)
806 struct spu_context *ctx;
809 ctx = file->private_data;
815 data = ctx->ops->signal2_read(ctx);
818 if (copy_to_user(buf, &data, 4))
824 static ssize_t spufs_signal2_write(struct file *file, const char __user *buf,
825 size_t len, loff_t *pos)
827 struct spu_context *ctx;
830 ctx = file->private_data;
835 if (copy_from_user(&data, buf, 4))
839 ctx->ops->signal2_write(ctx, data);
846 static struct page *spufs_signal2_mmap_nopage(struct vm_area_struct *vma,
847 unsigned long address, int *type)
849 #if PAGE_SIZE == 0x1000
850 return spufs_ps_nopage(vma, address, type, 0x1c000, 0x1000);
851 #elif PAGE_SIZE == 0x10000
852 /* For 64k pages, both signal1 and signal2 can be used to mmap the whole
853 * signal 1 and 2 area
855 return spufs_ps_nopage(vma, address, type, 0x10000, 0x10000);
857 #error unsupported page size
861 static struct vm_operations_struct spufs_signal2_mmap_vmops = {
862 .nopage = spufs_signal2_mmap_nopage,
865 static int spufs_signal2_mmap(struct file *file, struct vm_area_struct *vma)
867 if (!(vma->vm_flags & VM_SHARED))
871 vma->vm_flags |= VM_RESERVED;
872 vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
873 | _PAGE_NO_CACHE | _PAGE_GUARDED);
875 vma->vm_ops = &spufs_signal2_mmap_vmops;
878 #else /* SPUFS_MMAP_4K */
879 #define spufs_signal2_mmap NULL
880 #endif /* !SPUFS_MMAP_4K */
882 static struct file_operations spufs_signal2_fops = {
883 .open = spufs_signal2_open,
884 .read = spufs_signal2_read,
885 .write = spufs_signal2_write,
886 .mmap = spufs_signal2_mmap,
889 static void spufs_signal1_type_set(void *data, u64 val)
891 struct spu_context *ctx = data;
894 ctx->ops->signal1_type_set(ctx, val);
898 static u64 spufs_signal1_type_get(void *data)
900 struct spu_context *ctx = data;
904 ret = ctx->ops->signal1_type_get(ctx);
909 DEFINE_SIMPLE_ATTRIBUTE(spufs_signal1_type, spufs_signal1_type_get,
910 spufs_signal1_type_set, "%llu");
912 static void spufs_signal2_type_set(void *data, u64 val)
914 struct spu_context *ctx = data;
917 ctx->ops->signal2_type_set(ctx, val);
921 static u64 spufs_signal2_type_get(void *data)
923 struct spu_context *ctx = data;
927 ret = ctx->ops->signal2_type_get(ctx);
932 DEFINE_SIMPLE_ATTRIBUTE(spufs_signal2_type, spufs_signal2_type_get,
933 spufs_signal2_type_set, "%llu");
936 static struct page *spufs_mss_mmap_nopage(struct vm_area_struct *vma,
937 unsigned long address, int *type)
939 return spufs_ps_nopage(vma, address, type, 0x0000, 0x1000);
942 static struct vm_operations_struct spufs_mss_mmap_vmops = {
943 .nopage = spufs_mss_mmap_nopage,
947 * mmap support for problem state MFC DMA area [0x0000 - 0x0fff].
949 static int spufs_mss_mmap(struct file *file, struct vm_area_struct *vma)
951 if (!(vma->vm_flags & VM_SHARED))
954 vma->vm_flags |= VM_RESERVED;
955 vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
956 | _PAGE_NO_CACHE | _PAGE_GUARDED);
958 vma->vm_ops = &spufs_mss_mmap_vmops;
961 #else /* SPUFS_MMAP_4K */
962 #define spufs_mss_mmap NULL
963 #endif /* !SPUFS_MMAP_4K */
965 static int spufs_mss_open(struct inode *inode, struct file *file)
967 struct spufs_inode_info *i = SPUFS_I(inode);
969 file->private_data = i->i_ctx;
970 return nonseekable_open(inode, file);
973 static struct file_operations spufs_mss_fops = {
974 .open = spufs_mss_open,
975 .mmap = spufs_mss_mmap,
978 static struct page *spufs_psmap_mmap_nopage(struct vm_area_struct *vma,
979 unsigned long address, int *type)
981 return spufs_ps_nopage(vma, address, type, 0x0000, 0x20000);
984 static struct vm_operations_struct spufs_psmap_mmap_vmops = {
985 .nopage = spufs_psmap_mmap_nopage,
989 * mmap support for full problem state area [0x00000 - 0x1ffff].
991 static int spufs_psmap_mmap(struct file *file, struct vm_area_struct *vma)
993 if (!(vma->vm_flags & VM_SHARED))
996 vma->vm_flags |= VM_RESERVED;
997 vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
998 | _PAGE_NO_CACHE | _PAGE_GUARDED);
1000 vma->vm_ops = &spufs_psmap_mmap_vmops;
1004 static int spufs_psmap_open(struct inode *inode, struct file *file)
1006 struct spufs_inode_info *i = SPUFS_I(inode);
1008 file->private_data = i->i_ctx;
1009 return nonseekable_open(inode, file);
1012 static struct file_operations spufs_psmap_fops = {
1013 .open = spufs_psmap_open,
1014 .mmap = spufs_psmap_mmap,
1019 static struct page *spufs_mfc_mmap_nopage(struct vm_area_struct *vma,
1020 unsigned long address, int *type)
1022 return spufs_ps_nopage(vma, address, type, 0x3000, 0x1000);
1025 static struct vm_operations_struct spufs_mfc_mmap_vmops = {
1026 .nopage = spufs_mfc_mmap_nopage,
1030 * mmap support for problem state MFC DMA area [0x0000 - 0x0fff].
1032 static int spufs_mfc_mmap(struct file *file, struct vm_area_struct *vma)
1034 if (!(vma->vm_flags & VM_SHARED))
1037 vma->vm_flags |= VM_RESERVED;
1038 vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
1039 | _PAGE_NO_CACHE | _PAGE_GUARDED);
1041 vma->vm_ops = &spufs_mfc_mmap_vmops;
1044 #else /* SPUFS_MMAP_4K */
1045 #define spufs_mfc_mmap NULL
1046 #endif /* !SPUFS_MMAP_4K */
1048 static int spufs_mfc_open(struct inode *inode, struct file *file)
1050 struct spufs_inode_info *i = SPUFS_I(inode);
1051 struct spu_context *ctx = i->i_ctx;
1053 /* we don't want to deal with DMA into other processes */
1054 if (ctx->owner != current->mm)
1057 if (atomic_read(&inode->i_count) != 1)
1060 file->private_data = ctx;
1061 return nonseekable_open(inode, file);
1064 /* interrupt-level mfc callback function. */
1065 void spufs_mfc_callback(struct spu *spu)
1067 struct spu_context *ctx = spu->ctx;
1069 wake_up_all(&ctx->mfc_wq);
1071 pr_debug("%s %s\n", __FUNCTION__, spu->name);
1072 if (ctx->mfc_fasync) {
1073 u32 free_elements, tagstatus;
1076 /* no need for spu_acquire in interrupt context */
1077 free_elements = ctx->ops->get_mfc_free_elements(ctx);
1078 tagstatus = ctx->ops->read_mfc_tagstatus(ctx);
1081 if (free_elements & 0xffff)
1083 if (tagstatus & ctx->tagwait)
1086 kill_fasync(&ctx->mfc_fasync, SIGIO, mask);
1090 static int spufs_read_mfc_tagstatus(struct spu_context *ctx, u32 *status)
1092 /* See if there is one tag group is complete */
1093 /* FIXME we need locking around tagwait */
1094 *status = ctx->ops->read_mfc_tagstatus(ctx) & ctx->tagwait;
1095 ctx->tagwait &= ~*status;
1099 /* enable interrupt waiting for any tag group,
1100 may silently fail if interrupts are already enabled */
1101 ctx->ops->set_mfc_query(ctx, ctx->tagwait, 1);
1105 static ssize_t spufs_mfc_read(struct file *file, char __user *buffer,
1106 size_t size, loff_t *pos)
1108 struct spu_context *ctx = file->private_data;
1116 if (file->f_flags & O_NONBLOCK) {
1117 status = ctx->ops->read_mfc_tagstatus(ctx);
1118 if (!(status & ctx->tagwait))
1121 ctx->tagwait &= ~status;
1123 ret = spufs_wait(ctx->mfc_wq,
1124 spufs_read_mfc_tagstatus(ctx, &status));
1132 if (copy_to_user(buffer, &status, 4))
1139 static int spufs_check_valid_dma(struct mfc_dma_command *cmd)
1141 pr_debug("queueing DMA %x %lx %x %x %x\n", cmd->lsa,
1142 cmd->ea, cmd->size, cmd->tag, cmd->cmd);
1153 pr_debug("invalid DMA opcode %x\n", cmd->cmd);
1157 if ((cmd->lsa & 0xf) != (cmd->ea &0xf)) {
1158 pr_debug("invalid DMA alignment, ea %lx lsa %x\n",
1163 switch (cmd->size & 0xf) {
1184 pr_debug("invalid DMA alignment %x for size %x\n",
1185 cmd->lsa & 0xf, cmd->size);
1189 if (cmd->size > 16 * 1024) {
1190 pr_debug("invalid DMA size %x\n", cmd->size);
1194 if (cmd->tag & 0xfff0) {
1195 /* we reserve the higher tag numbers for kernel use */
1196 pr_debug("invalid DMA tag\n");
1201 /* not supported in this version */
1202 pr_debug("invalid DMA class\n");
1209 static int spu_send_mfc_command(struct spu_context *ctx,
1210 struct mfc_dma_command cmd,
1213 *error = ctx->ops->send_mfc_command(ctx, &cmd);
1214 if (*error == -EAGAIN) {
1215 /* wait for any tag group to complete
1216 so we have space for the new command */
1217 ctx->ops->set_mfc_query(ctx, ctx->tagwait, 1);
1218 /* try again, because the queue might be
1220 *error = ctx->ops->send_mfc_command(ctx, &cmd);
1221 if (*error == -EAGAIN)
1227 static ssize_t spufs_mfc_write(struct file *file, const char __user *buffer,
1228 size_t size, loff_t *pos)
1230 struct spu_context *ctx = file->private_data;
1231 struct mfc_dma_command cmd;
1234 if (size != sizeof cmd)
1238 if (copy_from_user(&cmd, buffer, sizeof cmd))
1241 ret = spufs_check_valid_dma(&cmd);
1245 spu_acquire_runnable(ctx);
1246 if (file->f_flags & O_NONBLOCK) {
1247 ret = ctx->ops->send_mfc_command(ctx, &cmd);
1250 ret = spufs_wait(ctx->mfc_wq,
1251 spu_send_mfc_command(ctx, cmd, &status));
1260 ctx->tagwait |= 1 << cmd.tag;
1266 static unsigned int spufs_mfc_poll(struct file *file,poll_table *wait)
1268 struct spu_context *ctx = file->private_data;
1269 u32 free_elements, tagstatus;
1273 ctx->ops->set_mfc_query(ctx, ctx->tagwait, 2);
1274 free_elements = ctx->ops->get_mfc_free_elements(ctx);
1275 tagstatus = ctx->ops->read_mfc_tagstatus(ctx);
1278 poll_wait(file, &ctx->mfc_wq, wait);
1281 if (free_elements & 0xffff)
1282 mask |= POLLOUT | POLLWRNORM;
1283 if (tagstatus & ctx->tagwait)
1284 mask |= POLLIN | POLLRDNORM;
1286 pr_debug("%s: free %d tagstatus %d tagwait %d\n", __FUNCTION__,
1287 free_elements, tagstatus, ctx->tagwait);
1292 static int spufs_mfc_flush(struct file *file, fl_owner_t id)
1294 struct spu_context *ctx = file->private_data;
1299 /* this currently hangs */
1300 ret = spufs_wait(ctx->mfc_wq,
1301 ctx->ops->set_mfc_query(ctx, ctx->tagwait, 2));
1304 ret = spufs_wait(ctx->mfc_wq,
1305 ctx->ops->read_mfc_tagstatus(ctx) == ctx->tagwait);
1315 static int spufs_mfc_fsync(struct file *file, struct dentry *dentry,
1318 return spufs_mfc_flush(file, NULL);
1321 static int spufs_mfc_fasync(int fd, struct file *file, int on)
1323 struct spu_context *ctx = file->private_data;
1325 return fasync_helper(fd, file, on, &ctx->mfc_fasync);
1328 static struct file_operations spufs_mfc_fops = {
1329 .open = spufs_mfc_open,
1330 .read = spufs_mfc_read,
1331 .write = spufs_mfc_write,
1332 .poll = spufs_mfc_poll,
1333 .flush = spufs_mfc_flush,
1334 .fsync = spufs_mfc_fsync,
1335 .fasync = spufs_mfc_fasync,
1336 .mmap = spufs_mfc_mmap,
1339 static void spufs_npc_set(void *data, u64 val)
1341 struct spu_context *ctx = data;
1343 ctx->ops->npc_write(ctx, val);
1347 static u64 spufs_npc_get(void *data)
1349 struct spu_context *ctx = data;
1352 ret = ctx->ops->npc_read(ctx);
1356 DEFINE_SIMPLE_ATTRIBUTE(spufs_npc_ops, spufs_npc_get, spufs_npc_set, "%llx\n")
1358 static void spufs_decr_set(void *data, u64 val)
1360 struct spu_context *ctx = data;
1361 struct spu_lscsa *lscsa = ctx->csa.lscsa;
1362 spu_acquire_saved(ctx);
1363 lscsa->decr.slot[0] = (u32) val;
1367 static u64 spufs_decr_get(void *data)
1369 struct spu_context *ctx = data;
1370 struct spu_lscsa *lscsa = ctx->csa.lscsa;
1372 spu_acquire_saved(ctx);
1373 ret = lscsa->decr.slot[0];
1377 DEFINE_SIMPLE_ATTRIBUTE(spufs_decr_ops, spufs_decr_get, spufs_decr_set,
1380 static void spufs_decr_status_set(void *data, u64 val)
1382 struct spu_context *ctx = data;
1383 struct spu_lscsa *lscsa = ctx->csa.lscsa;
1384 spu_acquire_saved(ctx);
1385 lscsa->decr_status.slot[0] = (u32) val;
1389 static u64 spufs_decr_status_get(void *data)
1391 struct spu_context *ctx = data;
1392 struct spu_lscsa *lscsa = ctx->csa.lscsa;
1394 spu_acquire_saved(ctx);
1395 ret = lscsa->decr_status.slot[0];
1399 DEFINE_SIMPLE_ATTRIBUTE(spufs_decr_status_ops, spufs_decr_status_get,
1400 spufs_decr_status_set, "%llx\n")
1402 static void spufs_spu_tag_mask_set(void *data, u64 val)
1404 struct spu_context *ctx = data;
1405 struct spu_lscsa *lscsa = ctx->csa.lscsa;
1406 spu_acquire_saved(ctx);
1407 lscsa->tag_mask.slot[0] = (u32) val;
1411 static u64 spufs_spu_tag_mask_get(void *data)
1413 struct spu_context *ctx = data;
1414 struct spu_lscsa *lscsa = ctx->csa.lscsa;
1416 spu_acquire_saved(ctx);
1417 ret = lscsa->tag_mask.slot[0];
1421 DEFINE_SIMPLE_ATTRIBUTE(spufs_spu_tag_mask_ops, spufs_spu_tag_mask_get,
1422 spufs_spu_tag_mask_set, "%llx\n")
1424 static void spufs_event_mask_set(void *data, u64 val)
1426 struct spu_context *ctx = data;
1427 struct spu_lscsa *lscsa = ctx->csa.lscsa;
1428 spu_acquire_saved(ctx);
1429 lscsa->event_mask.slot[0] = (u32) val;
1433 static u64 spufs_event_mask_get(void *data)
1435 struct spu_context *ctx = data;
1436 struct spu_lscsa *lscsa = ctx->csa.lscsa;
1438 spu_acquire_saved(ctx);
1439 ret = lscsa->event_mask.slot[0];
1443 DEFINE_SIMPLE_ATTRIBUTE(spufs_event_mask_ops, spufs_event_mask_get,
1444 spufs_event_mask_set, "%llx\n")
1446 static void spufs_srr0_set(void *data, u64 val)
1448 struct spu_context *ctx = data;
1449 struct spu_lscsa *lscsa = ctx->csa.lscsa;
1450 spu_acquire_saved(ctx);
1451 lscsa->srr0.slot[0] = (u32) val;
1455 static u64 spufs_srr0_get(void *data)
1457 struct spu_context *ctx = data;
1458 struct spu_lscsa *lscsa = ctx->csa.lscsa;
1460 spu_acquire_saved(ctx);
1461 ret = lscsa->srr0.slot[0];
1465 DEFINE_SIMPLE_ATTRIBUTE(spufs_srr0_ops, spufs_srr0_get, spufs_srr0_set,
1468 static u64 spufs_id_get(void *data)
1470 struct spu_context *ctx = data;
1474 if (ctx->state == SPU_STATE_RUNNABLE)
1475 num = ctx->spu->number;
1477 num = (unsigned int)-1;
1482 DEFINE_SIMPLE_ATTRIBUTE(spufs_id_ops, spufs_id_get, NULL, "0x%llx\n")
1484 struct tree_descr spufs_dir_contents[] = {
1485 { "mem", &spufs_mem_fops, 0666, },
1486 { "regs", &spufs_regs_fops, 0666, },
1487 { "mbox", &spufs_mbox_fops, 0444, },
1488 { "ibox", &spufs_ibox_fops, 0444, },
1489 { "wbox", &spufs_wbox_fops, 0222, },
1490 { "mbox_stat", &spufs_mbox_stat_fops, 0444, },
1491 { "ibox_stat", &spufs_ibox_stat_fops, 0444, },
1492 { "wbox_stat", &spufs_wbox_stat_fops, 0444, },
1493 { "signal1", &spufs_signal1_fops, 0666, },
1494 { "signal2", &spufs_signal2_fops, 0666, },
1495 { "signal1_type", &spufs_signal1_type, 0666, },
1496 { "signal2_type", &spufs_signal2_type, 0666, },
1497 { "mss", &spufs_mss_fops, 0666, },
1498 { "mfc", &spufs_mfc_fops, 0666, },
1499 { "cntl", &spufs_cntl_fops, 0666, },
1500 { "npc", &spufs_npc_ops, 0666, },
1501 { "fpcr", &spufs_fpcr_fops, 0666, },
1502 { "decr", &spufs_decr_ops, 0666, },
1503 { "decr_status", &spufs_decr_status_ops, 0666, },
1504 { "spu_tag_mask", &spufs_spu_tag_mask_ops, 0666, },
1505 { "event_mask", &spufs_event_mask_ops, 0666, },
1506 { "srr0", &spufs_srr0_ops, 0666, },
1507 { "phys-id", &spufs_id_ops, 0666, },
1508 { "psmap", &spufs_psmap_fops, 0666, },