1373 lines
30 KiB
C
1373 lines
30 KiB
C
/*
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* SPU file system -- file contents
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*
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* (C) Copyright IBM Deutschland Entwicklung GmbH 2005
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*
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* Author: Arnd Bergmann <arndb@de.ibm.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#undef DEBUG
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#include <linux/fs.h>
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#include <linux/ioctl.h>
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#include <linux/module.h>
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#include <linux/pagemap.h>
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#include <linux/poll.h>
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#include <linux/ptrace.h>
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#include <asm/io.h>
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#include <asm/semaphore.h>
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#include <asm/spu.h>
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#include <asm/uaccess.h>
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#include "spufs.h"
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static int
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spufs_mem_open(struct inode *inode, struct file *file)
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{
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struct spufs_inode_info *i = SPUFS_I(inode);
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struct spu_context *ctx = i->i_ctx;
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file->private_data = ctx;
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file->f_mapping = inode->i_mapping;
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ctx->local_store = inode->i_mapping;
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return 0;
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}
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static ssize_t
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spufs_mem_read(struct file *file, char __user *buffer,
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size_t size, loff_t *pos)
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{
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struct spu_context *ctx = file->private_data;
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char *local_store;
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int ret;
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spu_acquire(ctx);
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local_store = ctx->ops->get_ls(ctx);
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ret = simple_read_from_buffer(buffer, size, pos, local_store, LS_SIZE);
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spu_release(ctx);
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return ret;
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}
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static ssize_t
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spufs_mem_write(struct file *file, const char __user *buffer,
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size_t size, loff_t *pos)
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{
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struct spu_context *ctx = file->private_data;
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char *local_store;
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int ret;
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size = min_t(ssize_t, LS_SIZE - *pos, size);
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if (size <= 0)
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return -EFBIG;
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*pos += size;
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spu_acquire(ctx);
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local_store = ctx->ops->get_ls(ctx);
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ret = copy_from_user(local_store + *pos - size,
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buffer, size) ? -EFAULT : size;
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spu_release(ctx);
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return ret;
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}
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#ifdef CONFIG_SPUFS_MMAP
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static struct page *
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spufs_mem_mmap_nopage(struct vm_area_struct *vma,
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unsigned long address, int *type)
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{
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struct page *page = NOPAGE_SIGBUS;
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struct spu_context *ctx = vma->vm_file->private_data;
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unsigned long offset = address - vma->vm_start;
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offset += vma->vm_pgoff << PAGE_SHIFT;
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spu_acquire(ctx);
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if (ctx->state == SPU_STATE_SAVED)
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page = vmalloc_to_page(ctx->csa.lscsa->ls + offset);
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else
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page = pfn_to_page((ctx->spu->local_store_phys + offset)
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>> PAGE_SHIFT);
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spu_release(ctx);
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if (type)
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*type = VM_FAULT_MINOR;
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page_cache_get(page);
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return page;
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}
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static struct vm_operations_struct spufs_mem_mmap_vmops = {
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.nopage = spufs_mem_mmap_nopage,
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};
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static int
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spufs_mem_mmap(struct file *file, struct vm_area_struct *vma)
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{
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if (!(vma->vm_flags & VM_SHARED))
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return -EINVAL;
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/* FIXME: */
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vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
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| _PAGE_NO_CACHE);
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vma->vm_ops = &spufs_mem_mmap_vmops;
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return 0;
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}
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#endif
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static struct file_operations spufs_mem_fops = {
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.open = spufs_mem_open,
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.read = spufs_mem_read,
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.write = spufs_mem_write,
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.llseek = generic_file_llseek,
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#ifdef CONFIG_SPUFS_MMAP
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.mmap = spufs_mem_mmap,
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#endif
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};
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#ifdef CONFIG_SPUFS_MMAP
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static struct page *spufs_ps_nopage(struct vm_area_struct *vma,
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unsigned long address,
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int *type, unsigned long ps_offs)
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{
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struct page *page = NOPAGE_SIGBUS;
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int fault_type = VM_FAULT_SIGBUS;
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struct spu_context *ctx = vma->vm_file->private_data;
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unsigned long offset = address - vma->vm_start;
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unsigned long area;
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int ret;
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offset += vma->vm_pgoff << PAGE_SHIFT;
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if (offset >= 0x4000)
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goto out;
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ret = spu_acquire_runnable(ctx);
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if (ret)
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goto out;
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area = ctx->spu->problem_phys + ps_offs;
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page = pfn_to_page((area + offset) >> PAGE_SHIFT);
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fault_type = VM_FAULT_MINOR;
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page_cache_get(page);
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spu_release(ctx);
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out:
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if (type)
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*type = fault_type;
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return page;
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}
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static struct page *spufs_cntl_mmap_nopage(struct vm_area_struct *vma,
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unsigned long address, int *type)
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{
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return spufs_ps_nopage(vma, address, type, 0x4000);
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}
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static struct vm_operations_struct spufs_cntl_mmap_vmops = {
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.nopage = spufs_cntl_mmap_nopage,
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};
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/*
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* mmap support for problem state control area [0x4000 - 0x4fff].
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* Mapping this area requires that the application have CAP_SYS_RAWIO,
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* as these registers require special care when read/writing.
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*/
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static int spufs_cntl_mmap(struct file *file, struct vm_area_struct *vma)
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{
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if (!(vma->vm_flags & VM_SHARED))
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return -EINVAL;
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if (!capable(CAP_SYS_RAWIO))
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return -EPERM;
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vma->vm_flags |= VM_RESERVED;
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vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
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| _PAGE_NO_CACHE | _PAGE_GUARDED);
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vma->vm_ops = &spufs_cntl_mmap_vmops;
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return 0;
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}
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#endif
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static int spufs_cntl_open(struct inode *inode, struct file *file)
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{
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struct spufs_inode_info *i = SPUFS_I(inode);
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struct spu_context *ctx = i->i_ctx;
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file->private_data = ctx;
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file->f_mapping = inode->i_mapping;
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ctx->cntl = inode->i_mapping;
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return 0;
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}
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static ssize_t
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spufs_cntl_read(struct file *file, char __user *buffer,
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size_t size, loff_t *pos)
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{
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/* FIXME: read from spu status */
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return -EINVAL;
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}
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static ssize_t
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spufs_cntl_write(struct file *file, const char __user *buffer,
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size_t size, loff_t *pos)
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{
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/* FIXME: write to runctl bit */
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return -EINVAL;
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}
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static struct file_operations spufs_cntl_fops = {
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.open = spufs_cntl_open,
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.read = spufs_cntl_read,
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.write = spufs_cntl_write,
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#ifdef CONFIG_SPUFS_MMAP
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.mmap = spufs_cntl_mmap,
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#endif
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};
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static int
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spufs_regs_open(struct inode *inode, struct file *file)
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{
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struct spufs_inode_info *i = SPUFS_I(inode);
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file->private_data = i->i_ctx;
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return 0;
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}
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static ssize_t
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spufs_regs_read(struct file *file, char __user *buffer,
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size_t size, loff_t *pos)
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{
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struct spu_context *ctx = file->private_data;
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struct spu_lscsa *lscsa = ctx->csa.lscsa;
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int ret;
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spu_acquire_saved(ctx);
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ret = simple_read_from_buffer(buffer, size, pos,
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lscsa->gprs, sizeof lscsa->gprs);
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spu_release(ctx);
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return ret;
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}
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static ssize_t
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spufs_regs_write(struct file *file, const char __user *buffer,
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size_t size, loff_t *pos)
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{
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struct spu_context *ctx = file->private_data;
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struct spu_lscsa *lscsa = ctx->csa.lscsa;
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int ret;
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size = min_t(ssize_t, sizeof lscsa->gprs - *pos, size);
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if (size <= 0)
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return -EFBIG;
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*pos += size;
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spu_acquire_saved(ctx);
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ret = copy_from_user(lscsa->gprs + *pos - size,
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buffer, size) ? -EFAULT : size;
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spu_release(ctx);
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return ret;
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}
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static struct file_operations spufs_regs_fops = {
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.open = spufs_regs_open,
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.read = spufs_regs_read,
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.write = spufs_regs_write,
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.llseek = generic_file_llseek,
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};
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static ssize_t
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spufs_fpcr_read(struct file *file, char __user * buffer,
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size_t size, loff_t * pos)
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{
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struct spu_context *ctx = file->private_data;
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struct spu_lscsa *lscsa = ctx->csa.lscsa;
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int ret;
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spu_acquire_saved(ctx);
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ret = simple_read_from_buffer(buffer, size, pos,
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&lscsa->fpcr, sizeof(lscsa->fpcr));
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spu_release(ctx);
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return ret;
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}
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static ssize_t
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spufs_fpcr_write(struct file *file, const char __user * buffer,
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size_t size, loff_t * pos)
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{
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struct spu_context *ctx = file->private_data;
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struct spu_lscsa *lscsa = ctx->csa.lscsa;
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int ret;
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size = min_t(ssize_t, sizeof(lscsa->fpcr) - *pos, size);
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if (size <= 0)
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return -EFBIG;
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*pos += size;
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spu_acquire_saved(ctx);
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ret = copy_from_user((char *)&lscsa->fpcr + *pos - size,
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buffer, size) ? -EFAULT : size;
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spu_release(ctx);
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return ret;
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}
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static struct file_operations spufs_fpcr_fops = {
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.open = spufs_regs_open,
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.read = spufs_fpcr_read,
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.write = spufs_fpcr_write,
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.llseek = generic_file_llseek,
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};
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/* generic open function for all pipe-like files */
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static int spufs_pipe_open(struct inode *inode, struct file *file)
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{
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struct spufs_inode_info *i = SPUFS_I(inode);
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file->private_data = i->i_ctx;
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return nonseekable_open(inode, file);
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}
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static ssize_t spufs_mbox_read(struct file *file, char __user *buf,
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size_t len, loff_t *pos)
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{
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struct spu_context *ctx = file->private_data;
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u32 mbox_data;
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int ret;
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if (len < 4)
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return -EINVAL;
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spu_acquire(ctx);
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ret = ctx->ops->mbox_read(ctx, &mbox_data);
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spu_release(ctx);
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if (!ret)
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return -EAGAIN;
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if (copy_to_user(buf, &mbox_data, sizeof mbox_data))
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return -EFAULT;
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return 4;
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}
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static struct file_operations spufs_mbox_fops = {
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.open = spufs_pipe_open,
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.read = spufs_mbox_read,
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};
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static ssize_t spufs_mbox_stat_read(struct file *file, char __user *buf,
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size_t len, loff_t *pos)
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{
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struct spu_context *ctx = file->private_data;
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u32 mbox_stat;
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if (len < 4)
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return -EINVAL;
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spu_acquire(ctx);
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mbox_stat = ctx->ops->mbox_stat_read(ctx) & 0xff;
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spu_release(ctx);
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if (copy_to_user(buf, &mbox_stat, sizeof mbox_stat))
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return -EFAULT;
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return 4;
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}
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static struct file_operations spufs_mbox_stat_fops = {
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.open = spufs_pipe_open,
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.read = spufs_mbox_stat_read,
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};
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/* low-level ibox access function */
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size_t spu_ibox_read(struct spu_context *ctx, u32 *data)
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{
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return ctx->ops->ibox_read(ctx, data);
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}
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static int spufs_ibox_fasync(int fd, struct file *file, int on)
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{
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struct spu_context *ctx = file->private_data;
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return fasync_helper(fd, file, on, &ctx->ibox_fasync);
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}
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/* interrupt-level ibox callback function. */
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void spufs_ibox_callback(struct spu *spu)
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{
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struct spu_context *ctx = spu->ctx;
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wake_up_all(&ctx->ibox_wq);
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kill_fasync(&ctx->ibox_fasync, SIGIO, POLLIN);
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}
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static ssize_t spufs_ibox_read(struct file *file, char __user *buf,
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size_t len, loff_t *pos)
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{
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struct spu_context *ctx = file->private_data;
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u32 ibox_data;
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ssize_t ret;
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if (len < 4)
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return -EINVAL;
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spu_acquire(ctx);
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ret = 0;
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if (file->f_flags & O_NONBLOCK) {
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if (!spu_ibox_read(ctx, &ibox_data))
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ret = -EAGAIN;
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} else {
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ret = spufs_wait(ctx->ibox_wq, spu_ibox_read(ctx, &ibox_data));
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}
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spu_release(ctx);
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if (ret)
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return ret;
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ret = 4;
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if (copy_to_user(buf, &ibox_data, sizeof ibox_data))
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ret = -EFAULT;
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return ret;
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}
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static unsigned int spufs_ibox_poll(struct file *file, poll_table *wait)
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{
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struct spu_context *ctx = file->private_data;
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unsigned int mask;
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poll_wait(file, &ctx->ibox_wq, wait);
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spu_acquire(ctx);
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mask = ctx->ops->mbox_stat_poll(ctx, POLLIN | POLLRDNORM);
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spu_release(ctx);
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return mask;
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}
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static struct file_operations spufs_ibox_fops = {
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.open = spufs_pipe_open,
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.read = spufs_ibox_read,
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.poll = spufs_ibox_poll,
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.fasync = spufs_ibox_fasync,
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};
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static ssize_t spufs_ibox_stat_read(struct file *file, char __user *buf,
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size_t len, loff_t *pos)
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{
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struct spu_context *ctx = file->private_data;
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u32 ibox_stat;
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if (len < 4)
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return -EINVAL;
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spu_acquire(ctx);
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ibox_stat = (ctx->ops->mbox_stat_read(ctx) >> 16) & 0xff;
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spu_release(ctx);
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if (copy_to_user(buf, &ibox_stat, sizeof ibox_stat))
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return -EFAULT;
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return 4;
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}
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static struct file_operations spufs_ibox_stat_fops = {
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.open = spufs_pipe_open,
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.read = spufs_ibox_stat_read,
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};
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/* low-level mailbox write */
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size_t spu_wbox_write(struct spu_context *ctx, u32 data)
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{
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return ctx->ops->wbox_write(ctx, data);
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}
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static int spufs_wbox_fasync(int fd, struct file *file, int on)
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{
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struct spu_context *ctx = file->private_data;
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int ret;
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ret = fasync_helper(fd, file, on, &ctx->wbox_fasync);
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return ret;
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}
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|
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/* interrupt-level wbox callback function. */
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void spufs_wbox_callback(struct spu *spu)
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{
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struct spu_context *ctx = spu->ctx;
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wake_up_all(&ctx->wbox_wq);
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kill_fasync(&ctx->wbox_fasync, SIGIO, POLLOUT);
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}
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|
|
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 int spufs_signal1_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct spufs_inode_info *i = SPUFS_I(inode);
|
|
struct spu_context *ctx = i->i_ctx;
|
|
file->private_data = ctx;
|
|
file->f_mapping = inode->i_mapping;
|
|
ctx->signal1 = inode->i_mapping;
|
|
return nonseekable_open(inode, file);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
#ifdef CONFIG_SPUFS_MMAP
|
|
static struct page *spufs_signal1_mmap_nopage(struct vm_area_struct *vma,
|
|
unsigned long address, int *type)
|
|
{
|
|
return spufs_ps_nopage(vma, address, type, 0x14000);
|
|
}
|
|
|
|
static struct vm_operations_struct spufs_signal1_mmap_vmops = {
|
|
.nopage = spufs_signal1_mmap_nopage,
|
|
};
|
|
|
|
static int spufs_signal1_mmap(struct file *file, struct vm_area_struct *vma)
|
|
{
|
|
if (!(vma->vm_flags & VM_SHARED))
|
|
return -EINVAL;
|
|
|
|
vma->vm_flags |= VM_RESERVED;
|
|
vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
|
|
| _PAGE_NO_CACHE | _PAGE_GUARDED);
|
|
|
|
vma->vm_ops = &spufs_signal1_mmap_vmops;
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static struct file_operations spufs_signal1_fops = {
|
|
.open = spufs_signal1_open,
|
|
.read = spufs_signal1_read,
|
|
.write = spufs_signal1_write,
|
|
#ifdef CONFIG_SPUFS_MMAP
|
|
.mmap = spufs_signal1_mmap,
|
|
#endif
|
|
};
|
|
|
|
static int spufs_signal2_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct spufs_inode_info *i = SPUFS_I(inode);
|
|
struct spu_context *ctx = i->i_ctx;
|
|
file->private_data = ctx;
|
|
file->f_mapping = inode->i_mapping;
|
|
ctx->signal2 = inode->i_mapping;
|
|
return nonseekable_open(inode, file);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
#ifdef CONFIG_SPUFS_MMAP
|
|
static struct page *spufs_signal2_mmap_nopage(struct vm_area_struct *vma,
|
|
unsigned long address, int *type)
|
|
{
|
|
return spufs_ps_nopage(vma, address, type, 0x1c000);
|
|
}
|
|
|
|
static struct vm_operations_struct spufs_signal2_mmap_vmops = {
|
|
.nopage = spufs_signal2_mmap_nopage,
|
|
};
|
|
|
|
static int spufs_signal2_mmap(struct file *file, struct vm_area_struct *vma)
|
|
{
|
|
if (!(vma->vm_flags & VM_SHARED))
|
|
return -EINVAL;
|
|
|
|
/* FIXME: */
|
|
vma->vm_flags |= VM_RESERVED;
|
|
vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
|
|
| _PAGE_NO_CACHE | _PAGE_GUARDED);
|
|
|
|
vma->vm_ops = &spufs_signal2_mmap_vmops;
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static struct file_operations spufs_signal2_fops = {
|
|
.open = spufs_signal2_open,
|
|
.read = spufs_signal2_read,
|
|
.write = spufs_signal2_write,
|
|
#ifdef CONFIG_SPUFS_MMAP
|
|
.mmap = spufs_signal2_mmap,
|
|
#endif
|
|
};
|
|
|
|
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");
|
|
|
|
#ifdef CONFIG_SPUFS_MMAP
|
|
static struct page *spufs_mss_mmap_nopage(struct vm_area_struct *vma,
|
|
unsigned long address, int *type)
|
|
{
|
|
return spufs_ps_nopage(vma, address, type, 0x0000);
|
|
}
|
|
|
|
static struct vm_operations_struct spufs_mss_mmap_vmops = {
|
|
.nopage = spufs_mss_mmap_nopage,
|
|
};
|
|
|
|
/*
|
|
* mmap support for problem state MFC DMA area [0x0000 - 0x0fff].
|
|
* Mapping this area requires that the application have CAP_SYS_RAWIO,
|
|
* as these registers require special care when read/writing.
|
|
*/
|
|
static int spufs_mss_mmap(struct file *file, struct vm_area_struct *vma)
|
|
{
|
|
if (!(vma->vm_flags & VM_SHARED))
|
|
return -EINVAL;
|
|
|
|
if (!capable(CAP_SYS_RAWIO))
|
|
return -EPERM;
|
|
|
|
vma->vm_flags |= VM_RESERVED;
|
|
vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
|
|
| _PAGE_NO_CACHE | _PAGE_GUARDED);
|
|
|
|
vma->vm_ops = &spufs_mss_mmap_vmops;
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static int spufs_mss_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 struct file_operations spufs_mss_fops = {
|
|
.open = spufs_mss_open,
|
|
#ifdef CONFIG_SPUFS_MMAP
|
|
.mmap = spufs_mss_mmap,
|
|
#endif
|
|
};
|
|
|
|
|
|
#ifdef CONFIG_SPUFS_MMAP
|
|
static struct page *spufs_mfc_mmap_nopage(struct vm_area_struct *vma,
|
|
unsigned long address, int *type)
|
|
{
|
|
return spufs_ps_nopage(vma, address, type, 0x3000);
|
|
}
|
|
|
|
static struct vm_operations_struct spufs_mfc_mmap_vmops = {
|
|
.nopage = spufs_mfc_mmap_nopage,
|
|
};
|
|
|
|
/*
|
|
* mmap support for problem state MFC DMA area [0x0000 - 0x0fff].
|
|
* Mapping this area requires that the application have CAP_SYS_RAWIO,
|
|
* as these registers require special care when read/writing.
|
|
*/
|
|
static int spufs_mfc_mmap(struct file *file, struct vm_area_struct *vma)
|
|
{
|
|
if (!(vma->vm_flags & VM_SHARED))
|
|
return -EINVAL;
|
|
|
|
if (!capable(CAP_SYS_RAWIO))
|
|
return -EPERM;
|
|
|
|
vma->vm_flags |= VM_RESERVED;
|
|
vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
|
|
| _PAGE_NO_CACHE | _PAGE_GUARDED);
|
|
|
|
vma->vm_ops = &spufs_mfc_mmap_vmops;
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static int spufs_mfc_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct spufs_inode_info *i = SPUFS_I(inode);
|
|
struct spu_context *ctx = i->i_ctx;
|
|
|
|
/* we don't want to deal with DMA into other processes */
|
|
if (ctx->owner != current->mm)
|
|
return -EINVAL;
|
|
|
|
if (atomic_read(&inode->i_count) != 1)
|
|
return -EBUSY;
|
|
|
|
file->private_data = ctx;
|
|
return nonseekable_open(inode, file);
|
|
}
|
|
|
|
/* interrupt-level mfc callback function. */
|
|
void spufs_mfc_callback(struct spu *spu)
|
|
{
|
|
struct spu_context *ctx = spu->ctx;
|
|
|
|
wake_up_all(&ctx->mfc_wq);
|
|
|
|
pr_debug("%s %s\n", __FUNCTION__, spu->name);
|
|
if (ctx->mfc_fasync) {
|
|
u32 free_elements, tagstatus;
|
|
unsigned int mask;
|
|
|
|
/* no need for spu_acquire in interrupt context */
|
|
free_elements = ctx->ops->get_mfc_free_elements(ctx);
|
|
tagstatus = ctx->ops->read_mfc_tagstatus(ctx);
|
|
|
|
mask = 0;
|
|
if (free_elements & 0xffff)
|
|
mask |= POLLOUT;
|
|
if (tagstatus & ctx->tagwait)
|
|
mask |= POLLIN;
|
|
|
|
kill_fasync(&ctx->mfc_fasync, SIGIO, mask);
|
|
}
|
|
}
|
|
|
|
static int spufs_read_mfc_tagstatus(struct spu_context *ctx, u32 *status)
|
|
{
|
|
/* See if there is one tag group is complete */
|
|
/* FIXME we need locking around tagwait */
|
|
*status = ctx->ops->read_mfc_tagstatus(ctx) & ctx->tagwait;
|
|
ctx->tagwait &= ~*status;
|
|
if (*status)
|
|
return 1;
|
|
|
|
/* enable interrupt waiting for any tag group,
|
|
may silently fail if interrupts are already enabled */
|
|
ctx->ops->set_mfc_query(ctx, ctx->tagwait, 1);
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t spufs_mfc_read(struct file *file, char __user *buffer,
|
|
size_t size, loff_t *pos)
|
|
{
|
|
struct spu_context *ctx = file->private_data;
|
|
int ret = -EINVAL;
|
|
u32 status;
|
|
|
|
if (size != 4)
|
|
goto out;
|
|
|
|
spu_acquire(ctx);
|
|
if (file->f_flags & O_NONBLOCK) {
|
|
status = ctx->ops->read_mfc_tagstatus(ctx);
|
|
if (!(status & ctx->tagwait))
|
|
ret = -EAGAIN;
|
|
else
|
|
ctx->tagwait &= ~status;
|
|
} else {
|
|
ret = spufs_wait(ctx->mfc_wq,
|
|
spufs_read_mfc_tagstatus(ctx, &status));
|
|
}
|
|
spu_release(ctx);
|
|
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = 4;
|
|
if (copy_to_user(buffer, &status, 4))
|
|
ret = -EFAULT;
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int spufs_check_valid_dma(struct mfc_dma_command *cmd)
|
|
{
|
|
pr_debug("queueing DMA %x %lx %x %x %x\n", cmd->lsa,
|
|
cmd->ea, cmd->size, cmd->tag, cmd->cmd);
|
|
|
|
switch (cmd->cmd) {
|
|
case MFC_PUT_CMD:
|
|
case MFC_PUTF_CMD:
|
|
case MFC_PUTB_CMD:
|
|
case MFC_GET_CMD:
|
|
case MFC_GETF_CMD:
|
|
case MFC_GETB_CMD:
|
|
break;
|
|
default:
|
|
pr_debug("invalid DMA opcode %x\n", cmd->cmd);
|
|
return -EIO;
|
|
}
|
|
|
|
if ((cmd->lsa & 0xf) != (cmd->ea &0xf)) {
|
|
pr_debug("invalid DMA alignment, ea %lx lsa %x\n",
|
|
cmd->ea, cmd->lsa);
|
|
return -EIO;
|
|
}
|
|
|
|
switch (cmd->size & 0xf) {
|
|
case 1:
|
|
break;
|
|
case 2:
|
|
if (cmd->lsa & 1)
|
|
goto error;
|
|
break;
|
|
case 4:
|
|
if (cmd->lsa & 3)
|
|
goto error;
|
|
break;
|
|
case 8:
|
|
if (cmd->lsa & 7)
|
|
goto error;
|
|
break;
|
|
case 0:
|
|
if (cmd->lsa & 15)
|
|
goto error;
|
|
break;
|
|
error:
|
|
default:
|
|
pr_debug("invalid DMA alignment %x for size %x\n",
|
|
cmd->lsa & 0xf, cmd->size);
|
|
return -EIO;
|
|
}
|
|
|
|
if (cmd->size > 16 * 1024) {
|
|
pr_debug("invalid DMA size %x\n", cmd->size);
|
|
return -EIO;
|
|
}
|
|
|
|
if (cmd->tag & 0xfff0) {
|
|
/* we reserve the higher tag numbers for kernel use */
|
|
pr_debug("invalid DMA tag\n");
|
|
return -EIO;
|
|
}
|
|
|
|
if (cmd->class) {
|
|
/* not supported in this version */
|
|
pr_debug("invalid DMA class\n");
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int spu_send_mfc_command(struct spu_context *ctx,
|
|
struct mfc_dma_command cmd,
|
|
int *error)
|
|
{
|
|
*error = ctx->ops->send_mfc_command(ctx, &cmd);
|
|
if (*error == -EAGAIN) {
|
|
/* wait for any tag group to complete
|
|
so we have space for the new command */
|
|
ctx->ops->set_mfc_query(ctx, ctx->tagwait, 1);
|
|
/* try again, because the queue might be
|
|
empty again */
|
|
*error = ctx->ops->send_mfc_command(ctx, &cmd);
|
|
if (*error == -EAGAIN)
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static ssize_t spufs_mfc_write(struct file *file, const char __user *buffer,
|
|
size_t size, loff_t *pos)
|
|
{
|
|
struct spu_context *ctx = file->private_data;
|
|
struct mfc_dma_command cmd;
|
|
int ret = -EINVAL;
|
|
|
|
if (size != sizeof cmd)
|
|
goto out;
|
|
|
|
ret = -EFAULT;
|
|
if (copy_from_user(&cmd, buffer, sizeof cmd))
|
|
goto out;
|
|
|
|
ret = spufs_check_valid_dma(&cmd);
|
|
if (ret)
|
|
goto out;
|
|
|
|
spu_acquire_runnable(ctx);
|
|
if (file->f_flags & O_NONBLOCK) {
|
|
ret = ctx->ops->send_mfc_command(ctx, &cmd);
|
|
} else {
|
|
int status;
|
|
ret = spufs_wait(ctx->mfc_wq,
|
|
spu_send_mfc_command(ctx, cmd, &status));
|
|
if (status)
|
|
ret = status;
|
|
}
|
|
spu_release(ctx);
|
|
|
|
if (ret)
|
|
goto out;
|
|
|
|
ctx->tagwait |= 1 << cmd.tag;
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static unsigned int spufs_mfc_poll(struct file *file,poll_table *wait)
|
|
{
|
|
struct spu_context *ctx = file->private_data;
|
|
u32 free_elements, tagstatus;
|
|
unsigned int mask;
|
|
|
|
spu_acquire(ctx);
|
|
ctx->ops->set_mfc_query(ctx, ctx->tagwait, 2);
|
|
free_elements = ctx->ops->get_mfc_free_elements(ctx);
|
|
tagstatus = ctx->ops->read_mfc_tagstatus(ctx);
|
|
spu_release(ctx);
|
|
|
|
poll_wait(file, &ctx->mfc_wq, wait);
|
|
|
|
mask = 0;
|
|
if (free_elements & 0xffff)
|
|
mask |= POLLOUT | POLLWRNORM;
|
|
if (tagstatus & ctx->tagwait)
|
|
mask |= POLLIN | POLLRDNORM;
|
|
|
|
pr_debug("%s: free %d tagstatus %d tagwait %d\n", __FUNCTION__,
|
|
free_elements, tagstatus, ctx->tagwait);
|
|
|
|
return mask;
|
|
}
|
|
|
|
static int spufs_mfc_flush(struct file *file, fl_owner_t id)
|
|
{
|
|
struct spu_context *ctx = file->private_data;
|
|
int ret;
|
|
|
|
spu_acquire(ctx);
|
|
#if 0
|
|
/* this currently hangs */
|
|
ret = spufs_wait(ctx->mfc_wq,
|
|
ctx->ops->set_mfc_query(ctx, ctx->tagwait, 2));
|
|
if (ret)
|
|
goto out;
|
|
ret = spufs_wait(ctx->mfc_wq,
|
|
ctx->ops->read_mfc_tagstatus(ctx) == ctx->tagwait);
|
|
out:
|
|
#else
|
|
ret = 0;
|
|
#endif
|
|
spu_release(ctx);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int spufs_mfc_fsync(struct file *file, struct dentry *dentry,
|
|
int datasync)
|
|
{
|
|
return spufs_mfc_flush(file, NULL);
|
|
}
|
|
|
|
static int spufs_mfc_fasync(int fd, struct file *file, int on)
|
|
{
|
|
struct spu_context *ctx = file->private_data;
|
|
|
|
return fasync_helper(fd, file, on, &ctx->mfc_fasync);
|
|
}
|
|
|
|
static struct file_operations spufs_mfc_fops = {
|
|
.open = spufs_mfc_open,
|
|
.read = spufs_mfc_read,
|
|
.write = spufs_mfc_write,
|
|
.poll = spufs_mfc_poll,
|
|
.flush = spufs_mfc_flush,
|
|
.fsync = spufs_mfc_fsync,
|
|
.fasync = spufs_mfc_fasync,
|
|
#ifdef CONFIG_SPUFS_MMAP
|
|
.mmap = spufs_mfc_mmap,
|
|
#endif
|
|
};
|
|
|
|
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")
|
|
|
|
static u64 spufs_id_get(void *data)
|
|
{
|
|
struct spu_context *ctx = data;
|
|
u64 num;
|
|
|
|
spu_acquire(ctx);
|
|
if (ctx->state == SPU_STATE_RUNNABLE)
|
|
num = ctx->spu->number;
|
|
else
|
|
num = (unsigned int)-1;
|
|
spu_release(ctx);
|
|
|
|
return num;
|
|
}
|
|
DEFINE_SIMPLE_ATTRIBUTE(spufs_id_ops, spufs_id_get, 0, "0x%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, },
|
|
{ "mss", &spufs_mss_fops, 0666, },
|
|
{ "mfc", &spufs_mfc_fops, 0666, },
|
|
{ "cntl", &spufs_cntl_fops, 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, },
|
|
{ "phys-id", &spufs_id_ops, 0666, },
|
|
{},
|
|
};
|