diff options
author | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-09 10:03:44 -0800 |
---|---|---|
committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-09 10:03:44 -0800 |
commit | 6150c32589d1976ca8a5c987df951088c05a7542 (patch) | |
tree | 94073696576323ff966e365d8c47b8ecd8372f97 /arch/powerpc/platforms/cell/spufs/file.c | |
parent | 44637a12f80b80157d9c1bc5b7d6ef09c9e05713 (diff) | |
parent | be42d5fa3772241b8ecebd443f1fb36247959c54 (diff) |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc-merge
Diffstat (limited to 'arch/powerpc/platforms/cell/spufs/file.c')
-rw-r--r-- | arch/powerpc/platforms/cell/spufs/file.c | 794 |
1 files changed, 794 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/file.c b/arch/powerpc/platforms/cell/spufs/file.c new file mode 100644 index 00000000000..dfa649c9b95 --- /dev/null +++ b/arch/powerpc/platforms/cell/spufs/file.c @@ -0,0 +1,794 @@ +/* + * SPU file system -- file contents + * + * (C) Copyright IBM Deutschland Entwicklung GmbH 2005 + * + * Author: Arnd Bergmann <arndb@de.ibm.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <linux/fs.h> +#include <linux/ioctl.h> +#include <linux/module.h> +#include <linux/pagemap.h> +#include <linux/poll.h> +#include <linux/ptrace.h> + +#include <asm/io.h> +#include <asm/semaphore.h> +#include <asm/spu.h> +#include <asm/uaccess.h> + +#include "spufs.h" + + +static int +spufs_mem_open(struct inode *inode, struct file *file) +{ + struct spufs_inode_info *i = SPUFS_I(inode); + file->private_data = i->i_ctx; + file->f_mapping = i->i_ctx->local_store; + return 0; +} + +static ssize_t +spufs_mem_read(struct file *file, char __user *buffer, + size_t size, loff_t *pos) +{ + struct spu_context *ctx = file->private_data; + char *local_store; + int ret; + + spu_acquire(ctx); + + local_store = ctx->ops->get_ls(ctx); + ret = simple_read_from_buffer(buffer, size, pos, local_store, LS_SIZE); + + spu_release(ctx); + return ret; +} + +static ssize_t +spufs_mem_write(struct file *file, const char __user *buffer, + size_t size, loff_t *pos) +{ + struct spu_context *ctx = file->private_data; + char *local_store; + int ret; + + size = min_t(ssize_t, LS_SIZE - *pos, size); + if (size <= 0) + return -EFBIG; + *pos += size; + + spu_acquire(ctx); + + local_store = ctx->ops->get_ls(ctx); + ret = copy_from_user(local_store + *pos - size, + buffer, size) ? -EFAULT : size; + + spu_release(ctx); + return ret; +} + +#ifdef CONFIG_SPARSEMEM +static struct page * +spufs_mem_mmap_nopage(struct vm_area_struct *vma, + unsigned long address, int *type) +{ + struct page *page = NOPAGE_SIGBUS; + + struct spu_context *ctx = vma->vm_file->private_data; + unsigned long offset = address - vma->vm_start; + offset += vma->vm_pgoff << PAGE_SHIFT; + + spu_acquire(ctx); + + if (ctx->state == SPU_STATE_SAVED) + page = vmalloc_to_page(ctx->csa.lscsa->ls + offset); + else + page = pfn_to_page((ctx->spu->local_store_phys + offset) + >> PAGE_SHIFT); + + spu_release(ctx); + + if (type) + *type = VM_FAULT_MINOR; + + page_cache_get(page); + return page; +} + +static struct vm_operations_struct spufs_mem_mmap_vmops = { + .nopage = spufs_mem_mmap_nopage, +}; + +static int +spufs_mem_mmap(struct file *file, struct vm_area_struct *vma) +{ + if (!(vma->vm_flags & VM_SHARED)) + return -EINVAL; + + /* FIXME: */ + vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot) + | _PAGE_NO_CACHE); + + vma->vm_ops = &spufs_mem_mmap_vmops; + return 0; +} +#endif + +static struct file_operations spufs_mem_fops = { + .open = spufs_mem_open, + .read = spufs_mem_read, + .write = spufs_mem_write, + .llseek = generic_file_llseek, +#ifdef CONFIG_SPARSEMEM + .mmap = spufs_mem_mmap, +#endif +}; + +static int +spufs_regs_open(struct inode *inode, struct file *file) +{ + struct spufs_inode_info *i = SPUFS_I(inode); + file->private_data = i->i_ctx; + return 0; +} + +static ssize_t +spufs_regs_read(struct file *file, char __user *buffer, + size_t size, loff_t *pos) +{ + struct spu_context *ctx = file->private_data; + struct spu_lscsa *lscsa = ctx->csa.lscsa; + int ret; + + spu_acquire_saved(ctx); + + ret = simple_read_from_buffer(buffer, size, pos, + lscsa->gprs, sizeof lscsa->gprs); + + spu_release(ctx); + return ret; +} + +static ssize_t +spufs_regs_write(struct file *file, const char __user *buffer, + size_t size, loff_t *pos) +{ + struct spu_context *ctx = file->private_data; + struct spu_lscsa *lscsa = ctx->csa.lscsa; + int ret; + + size = min_t(ssize_t, sizeof lscsa->gprs - *pos, size); + if (size <= 0) + return -EFBIG; + *pos += size; + + spu_acquire_saved(ctx); + + ret = copy_from_user(lscsa->gprs + *pos - size, + buffer, size) ? -EFAULT : size; + + spu_release(ctx); + return ret; +} + +static struct file_operations spufs_regs_fops = { + .open = spufs_regs_open, + .read = spufs_regs_read, + .write = spufs_regs_write, + .llseek = generic_file_llseek, +}; + +static ssize_t +spufs_fpcr_read(struct file *file, char __user * buffer, + size_t size, loff_t * pos) +{ + struct spu_context *ctx = file->private_data; + struct spu_lscsa *lscsa = ctx->csa.lscsa; + int ret; + + spu_acquire_saved(ctx); + + ret = simple_read_from_buffer(buffer, size, pos, + &lscsa->fpcr, sizeof(lscsa->fpcr)); + + spu_release(ctx); + return ret; +} + +static ssize_t +spufs_fpcr_write(struct file *file, const char __user * buffer, + size_t size, loff_t * pos) +{ + struct spu_context *ctx = file->private_data; + struct spu_lscsa *lscsa = ctx->csa.lscsa; + int ret; + + size = min_t(ssize_t, sizeof(lscsa->fpcr) - *pos, size); + if (size <= 0) + return -EFBIG; + *pos += size; + + spu_acquire_saved(ctx); + + ret = copy_from_user((char *)&lscsa->fpcr + *pos - size, + buffer, size) ? -EFAULT : size; + + spu_release(ctx); + return ret; +} + +static struct file_operations spufs_fpcr_fops = { + .open = spufs_regs_open, + .read = spufs_fpcr_read, + .write = spufs_fpcr_write, + .llseek = generic_file_llseek, +}; + +/* generic open function for all pipe-like files */ +static int spufs_pipe_open(struct inode *inode, struct file *file) +{ + struct spufs_inode_info *i = SPUFS_I(inode); + file->private_data = i->i_ctx; + + return nonseekable_open(inode, file); +} + +static ssize_t spufs_mbox_read(struct file *file, char __user *buf, + size_t len, loff_t *pos) +{ + struct spu_context *ctx = file->private_data; + u32 mbox_data; + int ret; + + if (len < 4) + return -EINVAL; + + spu_acquire(ctx); + ret = ctx->ops->mbox_read(ctx, &mbox_data); + spu_release(ctx); + + if (!ret) + return -EAGAIN; + + if (copy_to_user(buf, &mbox_data, sizeof mbox_data)) + return -EFAULT; + + return 4; +} + +static struct file_operations spufs_mbox_fops = { + .open = spufs_pipe_open, + .read = spufs_mbox_read, +}; + +static ssize_t spufs_mbox_stat_read(struct file *file, char __user *buf, + size_t len, loff_t *pos) +{ + struct spu_context *ctx = file->private_data; + u32 mbox_stat; + + if (len < 4) + return -EINVAL; + + spu_acquire(ctx); + + mbox_stat = ctx->ops->mbox_stat_read(ctx) & 0xff; + + spu_release(ctx); + + if (copy_to_user(buf, &mbox_stat, sizeof mbox_stat)) + return -EFAULT; + + return 4; +} + +static struct file_operations spufs_mbox_stat_fops = { + .open = spufs_pipe_open, + .read = spufs_mbox_stat_read, +}; + +/* low-level ibox access function */ +size_t spu_ibox_read(struct spu_context *ctx, u32 *data) +{ + return ctx->ops->ibox_read(ctx, data); +} + +static int spufs_ibox_fasync(int fd, struct file *file, int on) +{ + struct spu_context *ctx = file->private_data; + + return fasync_helper(fd, file, on, &ctx->ibox_fasync); +} + +/* interrupt-level ibox callback function. */ +void spufs_ibox_callback(struct spu *spu) +{ + struct spu_context *ctx = spu->ctx; + + wake_up_all(&ctx->ibox_wq); + kill_fasync(&ctx->ibox_fasync, SIGIO, POLLIN); +} + +static ssize_t spufs_ibox_read(struct file *file, char __user *buf, + size_t len, loff_t *pos) +{ + struct spu_context *ctx = file->private_data; + u32 ibox_data; + ssize_t ret; + + if (len < 4) + return -EINVAL; + + spu_acquire(ctx); + + ret = 0; + if (file->f_flags & O_NONBLOCK) { + if (!spu_ibox_read(ctx, &ibox_data)) + ret = -EAGAIN; + } else { + ret = spufs_wait(ctx->ibox_wq, spu_ibox_read(ctx, &ibox_data)); + } + + spu_release(ctx); + + if (ret) + return ret; + + ret = 4; + if (copy_to_user(buf, &ibox_data, sizeof ibox_data)) + ret = -EFAULT; + + return ret; +} + +static unsigned int spufs_ibox_poll(struct file *file, poll_table *wait) +{ + struct spu_context *ctx = file->private_data; + unsigned int mask; + + poll_wait(file, &ctx->ibox_wq, wait); + + spu_acquire(ctx); + mask = ctx->ops->mbox_stat_poll(ctx, POLLIN | POLLRDNORM); + spu_release(ctx); + + return mask; +} + +static struct file_operations spufs_ibox_fops = { + .open = spufs_pipe_open, + .read = spufs_ibox_read, + .poll = spufs_ibox_poll, + .fasync = spufs_ibox_fasync, +}; + +static ssize_t spufs_ibox_stat_read(struct file *file, char __user *buf, + size_t len, loff_t *pos) +{ + struct spu_context *ctx = file->private_data; + u32 ibox_stat; + + if (len < 4) + return -EINVAL; + + spu_acquire(ctx); + ibox_stat = (ctx->ops->mbox_stat_read(ctx) >> 16) & 0xff; + spu_release(ctx); + + if (copy_to_user(buf, &ibox_stat, sizeof ibox_stat)) + return -EFAULT; + + return 4; +} + +static struct file_operations spufs_ibox_stat_fops = { + .open = spufs_pipe_open, + .read = spufs_ibox_stat_read, +}; + +/* low-level mailbox write */ +size_t spu_wbox_write(struct spu_context *ctx, u32 data) +{ + return ctx->ops->wbox_write(ctx, data); +} + +static int spufs_wbox_fasync(int fd, struct file *file, int on) +{ + struct spu_context *ctx = file->private_data; + int ret; + + ret = fasync_helper(fd, file, on, &ctx->wbox_fasync); + + return ret; +} + +/* interrupt-level wbox callback function. */ +void spufs_wbox_callback(struct spu *spu) +{ + struct spu_context *ctx = spu->ctx; + + wake_up_all(&ctx->wbox_wq); + kill_fasync(&ctx->wbox_fasync, SIGIO, POLLOUT); +} + +static ssize_t spufs_wbox_write(struct file *file, const char __user *buf, + size_t len, loff_t *pos) +{ + struct spu_context *ctx = file->private_data; + u32 wbox_data; + int ret; + + if (len < 4) + return -EINVAL; + + if (copy_from_user(&wbox_data, buf, sizeof wbox_data)) + return -EFAULT; + + spu_acquire(ctx); + + ret = 0; + if (file->f_flags & O_NONBLOCK) { + if (!spu_wbox_write(ctx, wbox_data)) + ret = -EAGAIN; + } else { + ret = spufs_wait(ctx->wbox_wq, spu_wbox_write(ctx, wbox_data)); + } + + spu_release(ctx); + + return ret ? ret : sizeof wbox_data; +} + +static unsigned int spufs_wbox_poll(struct file *file, poll_table *wait) +{ + struct spu_context *ctx = file->private_data; + unsigned int mask; + + poll_wait(file, &ctx->wbox_wq, wait); + + spu_acquire(ctx); + mask = ctx->ops->mbox_stat_poll(ctx, POLLOUT | POLLWRNORM); + spu_release(ctx); + + return mask; +} + +static struct file_operations spufs_wbox_fops = { + .open = spufs_pipe_open, + .write = spufs_wbox_write, + .poll = spufs_wbox_poll, + .fasync = spufs_wbox_fasync, +}; + +static ssize_t spufs_wbox_stat_read(struct file *file, char __user *buf, + size_t len, loff_t *pos) +{ + struct spu_context *ctx = file->private_data; + u32 wbox_stat; + + if (len < 4) + return -EINVAL; + + spu_acquire(ctx); + wbox_stat = (ctx->ops->mbox_stat_read(ctx) >> 8) & 0xff; + spu_release(ctx); + + if (copy_to_user(buf, &wbox_stat, sizeof wbox_stat)) + return -EFAULT; + + return 4; +} + +static struct file_operations spufs_wbox_stat_fops = { + .open = spufs_pipe_open, + .read = spufs_wbox_stat_read, +}; + +static ssize_t spufs_signal1_read(struct file *file, char __user *buf, + size_t len, loff_t *pos) +{ + struct spu_context *ctx = file->private_data; + u32 data; + + if (len < 4) + return -EINVAL; + + spu_acquire(ctx); + data = ctx->ops->signal1_read(ctx); + spu_release(ctx); + + if (copy_to_user(buf, &data, 4)) + return -EFAULT; + + return 4; +} + +static ssize_t spufs_signal1_write(struct file *file, const char __user *buf, + size_t len, loff_t *pos) +{ + struct spu_context *ctx; + u32 data; + + ctx = file->private_data; + + if (len < 4) + return -EINVAL; + + if (copy_from_user(&data, buf, 4)) + return -EFAULT; + + spu_acquire(ctx); + ctx->ops->signal1_write(ctx, data); + spu_release(ctx); + + return 4; +} + +static struct file_operations spufs_signal1_fops = { + .open = spufs_pipe_open, + .read = spufs_signal1_read, + .write = spufs_signal1_write, +}; + +static ssize_t spufs_signal2_read(struct file *file, char __user *buf, + size_t len, loff_t *pos) +{ + struct spu_context *ctx; + u32 data; + + ctx = file->private_data; + + if (len < 4) + return -EINVAL; + + spu_acquire(ctx); + data = ctx->ops->signal2_read(ctx); + spu_release(ctx); + + if (copy_to_user(buf, &data, 4)) + return -EFAULT; + + return 4; +} + +static ssize_t spufs_signal2_write(struct file *file, const char __user *buf, + size_t len, loff_t *pos) +{ + struct spu_context *ctx; + u32 data; + + ctx = file->private_data; + + if (len < 4) + return -EINVAL; + + if (copy_from_user(&data, buf, 4)) + return -EFAULT; + + spu_acquire(ctx); + ctx->ops->signal2_write(ctx, data); + spu_release(ctx); + + return 4; +} + +static struct file_operations spufs_signal2_fops = { + .open = spufs_pipe_open, + .read = spufs_signal2_read, + .write = spufs_signal2_write, +}; + +static void spufs_signal1_type_set(void *data, u64 val) +{ + struct spu_context *ctx = data; + + spu_acquire(ctx); + ctx->ops->signal1_type_set(ctx, val); + spu_release(ctx); +} + +static u64 spufs_signal1_type_get(void *data) +{ + struct spu_context *ctx = data; + u64 ret; + + spu_acquire(ctx); + ret = ctx->ops->signal1_type_get(ctx); + spu_release(ctx); + + return ret; +} +DEFINE_SIMPLE_ATTRIBUTE(spufs_signal1_type, spufs_signal1_type_get, + spufs_signal1_type_set, "%llu"); + +static void spufs_signal2_type_set(void *data, u64 val) +{ + struct spu_context *ctx = data; + + spu_acquire(ctx); + ctx->ops->signal2_type_set(ctx, val); + spu_release(ctx); +} + +static u64 spufs_signal2_type_get(void *data) +{ + struct spu_context *ctx = data; + u64 ret; + + spu_acquire(ctx); + ret = ctx->ops->signal2_type_get(ctx); + spu_release(ctx); + + return ret; +} +DEFINE_SIMPLE_ATTRIBUTE(spufs_signal2_type, spufs_signal2_type_get, + spufs_signal2_type_set, "%llu"); + +static void spufs_npc_set(void *data, u64 val) +{ + struct spu_context *ctx = data; + spu_acquire(ctx); + ctx->ops->npc_write(ctx, val); + spu_release(ctx); +} + +static u64 spufs_npc_get(void *data) +{ + struct spu_context *ctx = data; + u64 ret; + spu_acquire(ctx); + ret = ctx->ops->npc_read(ctx); + spu_release(ctx); + return ret; +} +DEFINE_SIMPLE_ATTRIBUTE(spufs_npc_ops, spufs_npc_get, spufs_npc_set, "%llx\n") + +static void spufs_decr_set(void *data, u64 val) +{ + struct spu_context *ctx = data; + struct spu_lscsa *lscsa = ctx->csa.lscsa; + spu_acquire_saved(ctx); + lscsa->decr.slot[0] = (u32) val; + spu_release(ctx); +} + +static u64 spufs_decr_get(void *data) +{ + struct spu_context *ctx = data; + struct spu_lscsa *lscsa = ctx->csa.lscsa; + u64 ret; + spu_acquire_saved(ctx); + ret = lscsa->decr.slot[0]; + spu_release(ctx); + return ret; +} +DEFINE_SIMPLE_ATTRIBUTE(spufs_decr_ops, spufs_decr_get, spufs_decr_set, + "%llx\n") + +static void spufs_decr_status_set(void *data, u64 val) +{ + struct spu_context *ctx = data; + struct spu_lscsa *lscsa = ctx->csa.lscsa; + spu_acquire_saved(ctx); + lscsa->decr_status.slot[0] = (u32) val; + spu_release(ctx); +} + +static u64 spufs_decr_status_get(void *data) +{ + struct spu_context *ctx = data; + struct spu_lscsa *lscsa = ctx->csa.lscsa; + u64 ret; + spu_acquire_saved(ctx); + ret = lscsa->decr_status.slot[0]; + spu_release(ctx); + return ret; +} +DEFINE_SIMPLE_ATTRIBUTE(spufs_decr_status_ops, spufs_decr_status_get, + spufs_decr_status_set, "%llx\n") + +static void spufs_spu_tag_mask_set(void *data, u64 val) +{ + struct spu_context *ctx = data; + struct spu_lscsa *lscsa = ctx->csa.lscsa; + spu_acquire_saved(ctx); + lscsa->tag_mask.slot[0] = (u32) val; + spu_release(ctx); +} + +static u64 spufs_spu_tag_mask_get(void *data) +{ + struct spu_context *ctx = data; + struct spu_lscsa *lscsa = ctx->csa.lscsa; + u64 ret; + spu_acquire_saved(ctx); + ret = lscsa->tag_mask.slot[0]; + spu_release(ctx); + return ret; +} +DEFINE_SIMPLE_ATTRIBUTE(spufs_spu_tag_mask_ops, spufs_spu_tag_mask_get, + spufs_spu_tag_mask_set, "%llx\n") + +static void spufs_event_mask_set(void *data, u64 val) +{ + struct spu_context *ctx = data; + struct spu_lscsa *lscsa = ctx->csa.lscsa; + spu_acquire_saved(ctx); + lscsa->event_mask.slot[0] = (u32) val; + spu_release(ctx); +} + +static u64 spufs_event_mask_get(void *data) +{ + struct spu_context *ctx = data; + struct spu_lscsa *lscsa = ctx->csa.lscsa; + u64 ret; + spu_acquire_saved(ctx); + ret = lscsa->event_mask.slot[0]; + spu_release(ctx); + return ret; +} +DEFINE_SIMPLE_ATTRIBUTE(spufs_event_mask_ops, spufs_event_mask_get, + spufs_event_mask_set, "%llx\n") + +static void spufs_srr0_set(void *data, u64 val) +{ + struct spu_context *ctx = data; + struct spu_lscsa *lscsa = ctx->csa.lscsa; + spu_acquire_saved(ctx); + lscsa->srr0.slot[0] = (u32) val; + spu_release(ctx); +} + +static u64 spufs_srr0_get(void *data) +{ + struct spu_context *ctx = data; + struct spu_lscsa *lscsa = ctx->csa.lscsa; + u64 ret; + spu_acquire_saved(ctx); + ret = lscsa->srr0.slot[0]; + spu_release(ctx); + return ret; +} +DEFINE_SIMPLE_ATTRIBUTE(spufs_srr0_ops, spufs_srr0_get, spufs_srr0_set, + "%llx\n") + +struct tree_descr spufs_dir_contents[] = { + { "mem", &spufs_mem_fops, 0666, }, + { "regs", &spufs_regs_fops, 0666, }, + { "mbox", &spufs_mbox_fops, 0444, }, + { "ibox", &spufs_ibox_fops, 0444, }, + { "wbox", &spufs_wbox_fops, 0222, }, + { "mbox_stat", &spufs_mbox_stat_fops, 0444, }, + { "ibox_stat", &spufs_ibox_stat_fops, 0444, }, + { "wbox_stat", &spufs_wbox_stat_fops, 0444, }, + { "signal1", &spufs_signal1_fops, 0666, }, + { "signal2", &spufs_signal2_fops, 0666, }, + { "signal1_type", &spufs_signal1_type, 0666, }, + { "signal2_type", &spufs_signal2_type, 0666, }, + { "npc", &spufs_npc_ops, 0666, }, + { "fpcr", &spufs_fpcr_fops, 0666, }, + { "decr", &spufs_decr_ops, 0666, }, + { "decr_status", &spufs_decr_status_ops, 0666, }, + { "spu_tag_mask", &spufs_spu_tag_mask_ops, 0666, }, + { "event_mask", &spufs_event_mask_ops, 0666, }, + { "srr0", &spufs_srr0_ops, 0666, }, + {}, +}; |