cbea92383d
Based on an original patch from Arnd Bergmann <arnd.bergmann@de.ibm.com> If there's no entry in the mailbox, then a read on the _info file will return data from an uninitialised variable. This change returns EOF if there's no mailbox info available instead. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2452 lines
57 KiB
C
2452 lines
57 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 <linux/seq_file.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/spu_info.h>
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#include <asm/uaccess.h>
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#include "spufs.h"
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#define SPUFS_MMAP_4K (PAGE_SIZE == 0x1000)
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/* Simple attribute files */
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struct spufs_attr {
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int (*get)(void *, u64 *);
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int (*set)(void *, u64);
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char get_buf[24]; /* enough to store a u64 and "\n\0" */
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char set_buf[24];
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void *data;
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const char *fmt; /* format for read operation */
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struct mutex mutex; /* protects access to these buffers */
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};
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static int spufs_attr_open(struct inode *inode, struct file *file,
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int (*get)(void *, u64 *), int (*set)(void *, u64),
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const char *fmt)
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{
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struct spufs_attr *attr;
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attr = kmalloc(sizeof(*attr), GFP_KERNEL);
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if (!attr)
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return -ENOMEM;
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attr->get = get;
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attr->set = set;
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attr->data = inode->i_private;
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attr->fmt = fmt;
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mutex_init(&attr->mutex);
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file->private_data = attr;
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return nonseekable_open(inode, file);
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}
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static int spufs_attr_release(struct inode *inode, struct file *file)
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{
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kfree(file->private_data);
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return 0;
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}
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static ssize_t spufs_attr_read(struct file *file, char __user *buf,
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size_t len, loff_t *ppos)
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{
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struct spufs_attr *attr;
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size_t size;
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ssize_t ret;
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attr = file->private_data;
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if (!attr->get)
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return -EACCES;
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ret = mutex_lock_interruptible(&attr->mutex);
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if (ret)
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return ret;
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if (*ppos) { /* continued read */
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size = strlen(attr->get_buf);
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} else { /* first read */
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u64 val;
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ret = attr->get(attr->data, &val);
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if (ret)
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goto out;
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size = scnprintf(attr->get_buf, sizeof(attr->get_buf),
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attr->fmt, (unsigned long long)val);
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}
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ret = simple_read_from_buffer(buf, len, ppos, attr->get_buf, size);
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out:
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mutex_unlock(&attr->mutex);
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return ret;
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}
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static ssize_t spufs_attr_write(struct file *file, const char __user *buf,
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size_t len, loff_t *ppos)
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{
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struct spufs_attr *attr;
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u64 val;
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size_t size;
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ssize_t ret;
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attr = file->private_data;
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if (!attr->set)
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return -EACCES;
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ret = mutex_lock_interruptible(&attr->mutex);
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if (ret)
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return ret;
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ret = -EFAULT;
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size = min(sizeof(attr->set_buf) - 1, len);
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if (copy_from_user(attr->set_buf, buf, size))
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goto out;
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ret = len; /* claim we got the whole input */
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attr->set_buf[size] = '\0';
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val = simple_strtol(attr->set_buf, NULL, 0);
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attr->set(attr->data, val);
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out:
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mutex_unlock(&attr->mutex);
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return ret;
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}
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#define DEFINE_SPUFS_SIMPLE_ATTRIBUTE(__fops, __get, __set, __fmt) \
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static int __fops ## _open(struct inode *inode, struct file *file) \
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{ \
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__simple_attr_check_format(__fmt, 0ull); \
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return spufs_attr_open(inode, file, __get, __set, __fmt); \
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} \
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static struct file_operations __fops = { \
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.owner = THIS_MODULE, \
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.open = __fops ## _open, \
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.release = spufs_attr_release, \
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.read = spufs_attr_read, \
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.write = spufs_attr_write, \
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};
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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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mutex_lock(&ctx->mapping_lock);
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file->private_data = ctx;
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if (!i->i_openers++)
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ctx->local_store = inode->i_mapping;
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mutex_unlock(&ctx->mapping_lock);
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return 0;
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}
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static int
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spufs_mem_release(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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mutex_lock(&ctx->mapping_lock);
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if (!--i->i_openers)
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ctx->local_store = NULL;
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mutex_unlock(&ctx->mapping_lock);
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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 spu_context *ctx, char __user *buffer,
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size_t size, loff_t *pos)
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{
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char *local_store = ctx->ops->get_ls(ctx);
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return simple_read_from_buffer(buffer, size, pos, local_store,
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LS_SIZE);
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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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ssize_t ret;
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ret = spu_acquire(ctx);
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if (ret)
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return ret;
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ret = __spufs_mem_read(ctx, buffer, size, pos);
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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 *ppos)
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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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loff_t pos = *ppos;
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int ret;
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if (pos < 0)
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return -EINVAL;
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if (pos > LS_SIZE)
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return -EFBIG;
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if (size > LS_SIZE - pos)
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size = LS_SIZE - pos;
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ret = spu_acquire(ctx);
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if (ret)
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return ret;
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local_store = ctx->ops->get_ls(ctx);
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ret = copy_from_user(local_store + pos, buffer, size);
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spu_release(ctx);
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if (ret)
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return -EFAULT;
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*ppos = pos + size;
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return size;
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}
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static unsigned long spufs_mem_mmap_nopfn(struct vm_area_struct *vma,
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unsigned long address)
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{
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struct spu_context *ctx = vma->vm_file->private_data;
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unsigned long pfn, offset, addr0 = address;
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#ifdef CONFIG_SPU_FS_64K_LS
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struct spu_state *csa = &ctx->csa;
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int psize;
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/* Check what page size we are using */
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psize = get_slice_psize(vma->vm_mm, address);
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/* Some sanity checking */
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BUG_ON(csa->use_big_pages != (psize == MMU_PAGE_64K));
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/* Wow, 64K, cool, we need to align the address though */
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if (csa->use_big_pages) {
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BUG_ON(vma->vm_start & 0xffff);
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address &= ~0xfffful;
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}
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#endif /* CONFIG_SPU_FS_64K_LS */
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offset = (address - vma->vm_start) + (vma->vm_pgoff << PAGE_SHIFT);
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if (offset >= LS_SIZE)
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return NOPFN_SIGBUS;
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pr_debug("spufs_mem_mmap_nopfn address=0x%lx -> 0x%lx, offset=0x%lx\n",
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addr0, address, offset);
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if (spu_acquire(ctx))
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return NOPFN_REFAULT;
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if (ctx->state == SPU_STATE_SAVED) {
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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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pfn = vmalloc_to_pfn(ctx->csa.lscsa->ls + offset);
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} else {
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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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pfn = (ctx->spu->local_store_phys + offset) >> PAGE_SHIFT;
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}
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vm_insert_pfn(vma, address, pfn);
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spu_release(ctx);
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return NOPFN_REFAULT;
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}
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static struct vm_operations_struct spufs_mem_mmap_vmops = {
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.nopfn = spufs_mem_mmap_nopfn,
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};
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static int spufs_mem_mmap(struct file *file, struct vm_area_struct *vma)
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{
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#ifdef CONFIG_SPU_FS_64K_LS
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struct spu_context *ctx = file->private_data;
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struct spu_state *csa = &ctx->csa;
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/* Sanity check VMA alignment */
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if (csa->use_big_pages) {
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pr_debug("spufs_mem_mmap 64K, start=0x%lx, end=0x%lx,"
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" pgoff=0x%lx\n", vma->vm_start, vma->vm_end,
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vma->vm_pgoff);
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if (vma->vm_start & 0xffff)
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return -EINVAL;
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if (vma->vm_pgoff & 0xf)
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return -EINVAL;
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}
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#endif /* CONFIG_SPU_FS_64K_LS */
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if (!(vma->vm_flags & VM_SHARED))
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return -EINVAL;
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vma->vm_flags |= VM_IO | VM_PFNMAP;
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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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#ifdef CONFIG_SPU_FS_64K_LS
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static unsigned long spufs_get_unmapped_area(struct file *file,
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unsigned long addr, unsigned long len, unsigned long pgoff,
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unsigned long flags)
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{
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struct spu_context *ctx = file->private_data;
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struct spu_state *csa = &ctx->csa;
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/* If not using big pages, fallback to normal MM g_u_a */
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if (!csa->use_big_pages)
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return current->mm->get_unmapped_area(file, addr, len,
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pgoff, flags);
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/* Else, try to obtain a 64K pages slice */
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return slice_get_unmapped_area(addr, len, flags,
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MMU_PAGE_64K, 1, 0);
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}
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#endif /* CONFIG_SPU_FS_64K_LS */
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static const struct file_operations spufs_mem_fops = {
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.open = spufs_mem_open,
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.release = spufs_mem_release,
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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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.mmap = spufs_mem_mmap,
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#ifdef CONFIG_SPU_FS_64K_LS
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.get_unmapped_area = spufs_get_unmapped_area,
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#endif
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};
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static unsigned long spufs_ps_nopfn(struct vm_area_struct *vma,
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unsigned long address,
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unsigned long ps_offs,
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unsigned long ps_size)
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{
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struct spu_context *ctx = vma->vm_file->private_data;
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unsigned long area, offset = address - vma->vm_start;
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offset += vma->vm_pgoff << PAGE_SHIFT;
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if (offset >= ps_size)
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return NOPFN_SIGBUS;
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/*
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* We have to wait for context to be loaded before we have
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* pages to hand out to the user, but we don't want to wait
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* with the mmap_sem held.
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* It is possible to drop the mmap_sem here, but then we need
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* to return NOPFN_REFAULT because the mappings may have
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* hanged.
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*/
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if (spu_acquire(ctx))
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return NOPFN_REFAULT;
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if (ctx->state == SPU_STATE_SAVED) {
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up_read(¤t->mm->mmap_sem);
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spufs_wait(ctx->run_wq, ctx->state == SPU_STATE_RUNNABLE);
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down_read(¤t->mm->mmap_sem);
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} else {
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area = ctx->spu->problem_phys + ps_offs;
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vm_insert_pfn(vma, address, (area + offset) >> PAGE_SHIFT);
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}
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spu_release(ctx);
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return NOPFN_REFAULT;
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}
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#if SPUFS_MMAP_4K
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static unsigned long spufs_cntl_mmap_nopfn(struct vm_area_struct *vma,
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unsigned long address)
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{
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return spufs_ps_nopfn(vma, address, 0x4000, 0x1000);
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}
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static struct vm_operations_struct spufs_cntl_mmap_vmops = {
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.nopfn = spufs_cntl_mmap_nopfn,
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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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*/
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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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vma->vm_flags |= VM_IO | VM_PFNMAP;
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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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#else /* SPUFS_MMAP_4K */
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#define spufs_cntl_mmap NULL
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#endif /* !SPUFS_MMAP_4K */
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static int spufs_cntl_get(void *data, u64 *val)
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{
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struct spu_context *ctx = data;
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int ret;
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ret = spu_acquire(ctx);
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if (ret)
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return ret;
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*val = ctx->ops->status_read(ctx);
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spu_release(ctx);
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return 0;
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}
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static int spufs_cntl_set(void *data, u64 val)
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{
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struct spu_context *ctx = data;
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int ret;
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ret = spu_acquire(ctx);
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if (ret)
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return ret;
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ctx->ops->runcntl_write(ctx, val);
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spu_release(ctx);
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return 0;
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}
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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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mutex_lock(&ctx->mapping_lock);
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file->private_data = ctx;
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if (!i->i_openers++)
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ctx->cntl = inode->i_mapping;
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mutex_unlock(&ctx->mapping_lock);
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return spufs_attr_open(inode, file, spufs_cntl_get,
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spufs_cntl_set, "0x%08lx");
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}
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static int
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spufs_cntl_release(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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spufs_attr_release(inode, file);
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mutex_lock(&ctx->mapping_lock);
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if (!--i->i_openers)
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ctx->cntl = NULL;
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mutex_unlock(&ctx->mapping_lock);
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return 0;
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}
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|
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static const struct file_operations spufs_cntl_fops = {
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.open = spufs_cntl_open,
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.release = spufs_cntl_release,
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.read = spufs_attr_read,
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.write = spufs_attr_write,
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.mmap = spufs_cntl_mmap,
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};
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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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|
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static ssize_t
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__spufs_regs_read(struct spu_context *ctx, char __user *buffer,
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size_t size, loff_t *pos)
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{
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struct spu_lscsa *lscsa = ctx->csa.lscsa;
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return simple_read_from_buffer(buffer, size, pos,
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lscsa->gprs, sizeof lscsa->gprs);
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}
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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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|
{
|
|
int ret;
|
|
struct spu_context *ctx = file->private_data;
|
|
|
|
ret = spu_acquire_saved(ctx);
|
|
if (ret)
|
|
return ret;
|
|
ret = __spufs_regs_read(ctx, buffer, size, pos);
|
|
spu_release_saved(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;
|
|
|
|
ret = spu_acquire_saved(ctx);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = copy_from_user(lscsa->gprs + *pos - size,
|
|
buffer, size) ? -EFAULT : size;
|
|
|
|
spu_release_saved(ctx);
|
|
return ret;
|
|
}
|
|
|
|
static const 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 spu_context *ctx, char __user * buffer,
|
|
size_t size, loff_t * pos)
|
|
{
|
|
struct spu_lscsa *lscsa = ctx->csa.lscsa;
|
|
return simple_read_from_buffer(buffer, size, pos,
|
|
&lscsa->fpcr, sizeof(lscsa->fpcr));
|
|
}
|
|
|
|
static ssize_t
|
|
spufs_fpcr_read(struct file *file, char __user * buffer,
|
|
size_t size, loff_t * pos)
|
|
{
|
|
int ret;
|
|
struct spu_context *ctx = file->private_data;
|
|
|
|
ret = spu_acquire_saved(ctx);
|
|
if (ret)
|
|
return ret;
|
|
ret = __spufs_fpcr_read(ctx, buffer, size, pos);
|
|
spu_release_saved(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;
|
|
|
|
ret = spu_acquire_saved(ctx);
|
|
if (ret)
|
|
return ret;
|
|
|
|
*pos += size;
|
|
ret = copy_from_user((char *)&lscsa->fpcr + *pos - size,
|
|
buffer, size) ? -EFAULT : size;
|
|
|
|
spu_release_saved(ctx);
|
|
return ret;
|
|
}
|
|
|
|
static const 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);
|
|
}
|
|
|
|
/*
|
|
* Read as many bytes from the mailbox as possible, until
|
|
* one of the conditions becomes true:
|
|
*
|
|
* - no more data available in the mailbox
|
|
* - end of the user provided buffer
|
|
* - end of the mapped area
|
|
*/
|
|
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, __user *udata;
|
|
ssize_t count;
|
|
|
|
if (len < 4)
|
|
return -EINVAL;
|
|
|
|
if (!access_ok(VERIFY_WRITE, buf, len))
|
|
return -EFAULT;
|
|
|
|
udata = (void __user *)buf;
|
|
|
|
count = spu_acquire(ctx);
|
|
if (count)
|
|
return count;
|
|
|
|
for (count = 0; (count + 4) <= len; count += 4, udata++) {
|
|
int ret;
|
|
ret = ctx->ops->mbox_read(ctx, &mbox_data);
|
|
if (ret == 0)
|
|
break;
|
|
|
|
/*
|
|
* at the end of the mapped area, we can fault
|
|
* but still need to return the data we have
|
|
* read successfully so far.
|
|
*/
|
|
ret = __put_user(mbox_data, udata);
|
|
if (ret) {
|
|
if (!count)
|
|
count = -EFAULT;
|
|
break;
|
|
}
|
|
}
|
|
spu_release(ctx);
|
|
|
|
if (!count)
|
|
count = -EAGAIN;
|
|
|
|
return count;
|
|
}
|
|
|
|
static const 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;
|
|
ssize_t ret;
|
|
u32 mbox_stat;
|
|
|
|
if (len < 4)
|
|
return -EINVAL;
|
|
|
|
ret = spu_acquire(ctx);
|
|
if (ret)
|
|
return ret;
|
|
|
|
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 const 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;
|
|
|
|
if (!ctx)
|
|
return;
|
|
|
|
wake_up_all(&ctx->ibox_wq);
|
|
kill_fasync(&ctx->ibox_fasync, SIGIO, POLLIN);
|
|
}
|
|
|
|
/*
|
|
* Read as many bytes from the interrupt mailbox as possible, until
|
|
* one of the conditions becomes true:
|
|
*
|
|
* - no more data available in the mailbox
|
|
* - end of the user provided buffer
|
|
* - end of the mapped area
|
|
*
|
|
* If the file is opened without O_NONBLOCK, we wait here until
|
|
* any data is available, but return when we have been able to
|
|
* read something.
|
|
*/
|
|
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, __user *udata;
|
|
ssize_t count;
|
|
|
|
if (len < 4)
|
|
return -EINVAL;
|
|
|
|
if (!access_ok(VERIFY_WRITE, buf, len))
|
|
return -EFAULT;
|
|
|
|
udata = (void __user *)buf;
|
|
|
|
count = spu_acquire(ctx);
|
|
if (count)
|
|
return count;
|
|
|
|
/* wait only for the first element */
|
|
count = 0;
|
|
if (file->f_flags & O_NONBLOCK) {
|
|
if (!spu_ibox_read(ctx, &ibox_data))
|
|
count = -EAGAIN;
|
|
} else {
|
|
count = spufs_wait(ctx->ibox_wq, spu_ibox_read(ctx, &ibox_data));
|
|
}
|
|
if (count)
|
|
goto out;
|
|
|
|
/* if we can't write at all, return -EFAULT */
|
|
count = __put_user(ibox_data, udata);
|
|
if (count)
|
|
goto out;
|
|
|
|
for (count = 4, udata++; (count + 4) <= len; count += 4, udata++) {
|
|
int ret;
|
|
ret = ctx->ops->ibox_read(ctx, &ibox_data);
|
|
if (ret == 0)
|
|
break;
|
|
/*
|
|
* at the end of the mapped area, we can fault
|
|
* but still need to return the data we have
|
|
* read successfully so far.
|
|
*/
|
|
ret = __put_user(ibox_data, udata);
|
|
if (ret)
|
|
break;
|
|
}
|
|
|
|
out:
|
|
spu_release(ctx);
|
|
|
|
return count;
|
|
}
|
|
|
|
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);
|
|
|
|
/*
|
|
* For now keep this uninterruptible and also ignore the rule
|
|
* that poll should not sleep. Will be fixed later.
|
|
*/
|
|
mutex_lock(&ctx->state_mutex);
|
|
mask = ctx->ops->mbox_stat_poll(ctx, POLLIN | POLLRDNORM);
|
|
spu_release(ctx);
|
|
|
|
return mask;
|
|
}
|
|
|
|
static const 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;
|
|
ssize_t ret;
|
|
u32 ibox_stat;
|
|
|
|
if (len < 4)
|
|
return -EINVAL;
|
|
|
|
ret = spu_acquire(ctx);
|
|
if (ret)
|
|
return ret;
|
|
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 const 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;
|
|
|
|
if (!ctx)
|
|
return;
|
|
|
|
wake_up_all(&ctx->wbox_wq);
|
|
kill_fasync(&ctx->wbox_fasync, SIGIO, POLLOUT);
|
|
}
|
|
|
|
/*
|
|
* Write as many bytes to the interrupt mailbox as possible, until
|
|
* one of the conditions becomes true:
|
|
*
|
|
* - the mailbox is full
|
|
* - end of the user provided buffer
|
|
* - end of the mapped area
|
|
*
|
|
* If the file is opened without O_NONBLOCK, we wait here until
|
|
* space is availabyl, but return when we have been able to
|
|
* write something.
|
|
*/
|
|
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, __user *udata;
|
|
ssize_t count;
|
|
|
|
if (len < 4)
|
|
return -EINVAL;
|
|
|
|
udata = (void __user *)buf;
|
|
if (!access_ok(VERIFY_READ, buf, len))
|
|
return -EFAULT;
|
|
|
|
if (__get_user(wbox_data, udata))
|
|
return -EFAULT;
|
|
|
|
count = spu_acquire(ctx);
|
|
if (count)
|
|
return count;
|
|
|
|
/*
|
|
* make sure we can at least write one element, by waiting
|
|
* in case of !O_NONBLOCK
|
|
*/
|
|
count = 0;
|
|
if (file->f_flags & O_NONBLOCK) {
|
|
if (!spu_wbox_write(ctx, wbox_data))
|
|
count = -EAGAIN;
|
|
} else {
|
|
count = spufs_wait(ctx->wbox_wq, spu_wbox_write(ctx, wbox_data));
|
|
}
|
|
|
|
if (count)
|
|
goto out;
|
|
|
|
/* write as much as possible */
|
|
for (count = 4, udata++; (count + 4) <= len; count += 4, udata++) {
|
|
int ret;
|
|
ret = __get_user(wbox_data, udata);
|
|
if (ret)
|
|
break;
|
|
|
|
ret = spu_wbox_write(ctx, wbox_data);
|
|
if (ret == 0)
|
|
break;
|
|
}
|
|
|
|
out:
|
|
spu_release(ctx);
|
|
return count;
|
|
}
|
|
|
|
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);
|
|
|
|
/*
|
|
* For now keep this uninterruptible and also ignore the rule
|
|
* that poll should not sleep. Will be fixed later.
|
|
*/
|
|
mutex_lock(&ctx->state_mutex);
|
|
mask = ctx->ops->mbox_stat_poll(ctx, POLLOUT | POLLWRNORM);
|
|
spu_release(ctx);
|
|
|
|
return mask;
|
|
}
|
|
|
|
static const 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;
|
|
ssize_t ret;
|
|
u32 wbox_stat;
|
|
|
|
if (len < 4)
|
|
return -EINVAL;
|
|
|
|
ret = spu_acquire(ctx);
|
|
if (ret)
|
|
return ret;
|
|
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 const 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;
|
|
|
|
mutex_lock(&ctx->mapping_lock);
|
|
file->private_data = ctx;
|
|
if (!i->i_openers++)
|
|
ctx->signal1 = inode->i_mapping;
|
|
mutex_unlock(&ctx->mapping_lock);
|
|
return nonseekable_open(inode, file);
|
|
}
|
|
|
|
static int
|
|
spufs_signal1_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct spufs_inode_info *i = SPUFS_I(inode);
|
|
struct spu_context *ctx = i->i_ctx;
|
|
|
|
mutex_lock(&ctx->mapping_lock);
|
|
if (!--i->i_openers)
|
|
ctx->signal1 = NULL;
|
|
mutex_unlock(&ctx->mapping_lock);
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t __spufs_signal1_read(struct spu_context *ctx, char __user *buf,
|
|
size_t len, loff_t *pos)
|
|
{
|
|
int ret = 0;
|
|
u32 data;
|
|
|
|
if (len < 4)
|
|
return -EINVAL;
|
|
|
|
if (ctx->csa.spu_chnlcnt_RW[3]) {
|
|
data = ctx->csa.spu_chnldata_RW[3];
|
|
ret = 4;
|
|
}
|
|
|
|
if (!ret)
|
|
goto out;
|
|
|
|
if (copy_to_user(buf, &data, 4))
|
|
return -EFAULT;
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t spufs_signal1_read(struct file *file, char __user *buf,
|
|
size_t len, loff_t *pos)
|
|
{
|
|
int ret;
|
|
struct spu_context *ctx = file->private_data;
|
|
|
|
ret = spu_acquire_saved(ctx);
|
|
if (ret)
|
|
return ret;
|
|
ret = __spufs_signal1_read(ctx, buf, len, pos);
|
|
spu_release_saved(ctx);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t spufs_signal1_write(struct file *file, const char __user *buf,
|
|
size_t len, loff_t *pos)
|
|
{
|
|
struct spu_context *ctx;
|
|
ssize_t ret;
|
|
u32 data;
|
|
|
|
ctx = file->private_data;
|
|
|
|
if (len < 4)
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(&data, buf, 4))
|
|
return -EFAULT;
|
|
|
|
ret = spu_acquire(ctx);
|
|
if (ret)
|
|
return ret;
|
|
ctx->ops->signal1_write(ctx, data);
|
|
spu_release(ctx);
|
|
|
|
return 4;
|
|
}
|
|
|
|
static unsigned long spufs_signal1_mmap_nopfn(struct vm_area_struct *vma,
|
|
unsigned long address)
|
|
{
|
|
#if PAGE_SIZE == 0x1000
|
|
return spufs_ps_nopfn(vma, address, 0x14000, 0x1000);
|
|
#elif PAGE_SIZE == 0x10000
|
|
/* For 64k pages, both signal1 and signal2 can be used to mmap the whole
|
|
* signal 1 and 2 area
|
|
*/
|
|
return spufs_ps_nopfn(vma, address, 0x10000, 0x10000);
|
|
#else
|
|
#error unsupported page size
|
|
#endif
|
|
}
|
|
|
|
static struct vm_operations_struct spufs_signal1_mmap_vmops = {
|
|
.nopfn = spufs_signal1_mmap_nopfn,
|
|
};
|
|
|
|
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_IO | VM_PFNMAP;
|
|
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;
|
|
}
|
|
|
|
static const struct file_operations spufs_signal1_fops = {
|
|
.open = spufs_signal1_open,
|
|
.release = spufs_signal1_release,
|
|
.read = spufs_signal1_read,
|
|
.write = spufs_signal1_write,
|
|
.mmap = spufs_signal1_mmap,
|
|
};
|
|
|
|
static const struct file_operations spufs_signal1_nosched_fops = {
|
|
.open = spufs_signal1_open,
|
|
.release = spufs_signal1_release,
|
|
.write = spufs_signal1_write,
|
|
.mmap = spufs_signal1_mmap,
|
|
};
|
|
|
|
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;
|
|
|
|
mutex_lock(&ctx->mapping_lock);
|
|
file->private_data = ctx;
|
|
if (!i->i_openers++)
|
|
ctx->signal2 = inode->i_mapping;
|
|
mutex_unlock(&ctx->mapping_lock);
|
|
return nonseekable_open(inode, file);
|
|
}
|
|
|
|
static int
|
|
spufs_signal2_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct spufs_inode_info *i = SPUFS_I(inode);
|
|
struct spu_context *ctx = i->i_ctx;
|
|
|
|
mutex_lock(&ctx->mapping_lock);
|
|
if (!--i->i_openers)
|
|
ctx->signal2 = NULL;
|
|
mutex_unlock(&ctx->mapping_lock);
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t __spufs_signal2_read(struct spu_context *ctx, char __user *buf,
|
|
size_t len, loff_t *pos)
|
|
{
|
|
int ret = 0;
|
|
u32 data;
|
|
|
|
if (len < 4)
|
|
return -EINVAL;
|
|
|
|
if (ctx->csa.spu_chnlcnt_RW[4]) {
|
|
data = ctx->csa.spu_chnldata_RW[4];
|
|
ret = 4;
|
|
}
|
|
|
|
if (!ret)
|
|
goto out;
|
|
|
|
if (copy_to_user(buf, &data, 4))
|
|
return -EFAULT;
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t spufs_signal2_read(struct file *file, char __user *buf,
|
|
size_t len, loff_t *pos)
|
|
{
|
|
struct spu_context *ctx = file->private_data;
|
|
int ret;
|
|
|
|
ret = spu_acquire_saved(ctx);
|
|
if (ret)
|
|
return ret;
|
|
ret = __spufs_signal2_read(ctx, buf, len, pos);
|
|
spu_release_saved(ctx);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t spufs_signal2_write(struct file *file, const char __user *buf,
|
|
size_t len, loff_t *pos)
|
|
{
|
|
struct spu_context *ctx;
|
|
ssize_t ret;
|
|
u32 data;
|
|
|
|
ctx = file->private_data;
|
|
|
|
if (len < 4)
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(&data, buf, 4))
|
|
return -EFAULT;
|
|
|
|
ret = spu_acquire(ctx);
|
|
if (ret)
|
|
return ret;
|
|
ctx->ops->signal2_write(ctx, data);
|
|
spu_release(ctx);
|
|
|
|
return 4;
|
|
}
|
|
|
|
#if SPUFS_MMAP_4K
|
|
static unsigned long spufs_signal2_mmap_nopfn(struct vm_area_struct *vma,
|
|
unsigned long address)
|
|
{
|
|
#if PAGE_SIZE == 0x1000
|
|
return spufs_ps_nopfn(vma, address, 0x1c000, 0x1000);
|
|
#elif PAGE_SIZE == 0x10000
|
|
/* For 64k pages, both signal1 and signal2 can be used to mmap the whole
|
|
* signal 1 and 2 area
|
|
*/
|
|
return spufs_ps_nopfn(vma, address, 0x10000, 0x10000);
|
|
#else
|
|
#error unsupported page size
|
|
#endif
|
|
}
|
|
|
|
static struct vm_operations_struct spufs_signal2_mmap_vmops = {
|
|
.nopfn = spufs_signal2_mmap_nopfn,
|
|
};
|
|
|
|
static int spufs_signal2_mmap(struct file *file, struct vm_area_struct *vma)
|
|
{
|
|
if (!(vma->vm_flags & VM_SHARED))
|
|
return -EINVAL;
|
|
|
|
vma->vm_flags |= VM_IO | VM_PFNMAP;
|
|
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;
|
|
}
|
|
#else /* SPUFS_MMAP_4K */
|
|
#define spufs_signal2_mmap NULL
|
|
#endif /* !SPUFS_MMAP_4K */
|
|
|
|
static const struct file_operations spufs_signal2_fops = {
|
|
.open = spufs_signal2_open,
|
|
.release = spufs_signal2_release,
|
|
.read = spufs_signal2_read,
|
|
.write = spufs_signal2_write,
|
|
.mmap = spufs_signal2_mmap,
|
|
};
|
|
|
|
static const struct file_operations spufs_signal2_nosched_fops = {
|
|
.open = spufs_signal2_open,
|
|
.release = spufs_signal2_release,
|
|
.write = spufs_signal2_write,
|
|
.mmap = spufs_signal2_mmap,
|
|
};
|
|
|
|
/*
|
|
* This is a wrapper around DEFINE_SIMPLE_ATTRIBUTE which does the
|
|
* work of acquiring (or not) the SPU context before calling through
|
|
* to the actual get routine. The set routine is called directly.
|
|
*/
|
|
#define SPU_ATTR_NOACQUIRE 0
|
|
#define SPU_ATTR_ACQUIRE 1
|
|
#define SPU_ATTR_ACQUIRE_SAVED 2
|
|
|
|
#define DEFINE_SPUFS_ATTRIBUTE(__name, __get, __set, __fmt, __acquire) \
|
|
static int __##__get(void *data, u64 *val) \
|
|
{ \
|
|
struct spu_context *ctx = data; \
|
|
int ret = 0; \
|
|
\
|
|
if (__acquire == SPU_ATTR_ACQUIRE) { \
|
|
ret = spu_acquire(ctx); \
|
|
if (ret) \
|
|
return ret; \
|
|
*val = __get(ctx); \
|
|
spu_release(ctx); \
|
|
} else if (__acquire == SPU_ATTR_ACQUIRE_SAVED) { \
|
|
ret = spu_acquire_saved(ctx); \
|
|
if (ret) \
|
|
return ret; \
|
|
*val = __get(ctx); \
|
|
spu_release_saved(ctx); \
|
|
} else \
|
|
*val = __get(ctx); \
|
|
\
|
|
return 0; \
|
|
} \
|
|
DEFINE_SPUFS_SIMPLE_ATTRIBUTE(__name, __##__get, __set, __fmt);
|
|
|
|
static int spufs_signal1_type_set(void *data, u64 val)
|
|
{
|
|
struct spu_context *ctx = data;
|
|
int ret;
|
|
|
|
ret = spu_acquire(ctx);
|
|
if (ret)
|
|
return ret;
|
|
ctx->ops->signal1_type_set(ctx, val);
|
|
spu_release(ctx);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static u64 spufs_signal1_type_get(struct spu_context *ctx)
|
|
{
|
|
return ctx->ops->signal1_type_get(ctx);
|
|
}
|
|
DEFINE_SPUFS_ATTRIBUTE(spufs_signal1_type, spufs_signal1_type_get,
|
|
spufs_signal1_type_set, "%llu", SPU_ATTR_ACQUIRE);
|
|
|
|
|
|
static int spufs_signal2_type_set(void *data, u64 val)
|
|
{
|
|
struct spu_context *ctx = data;
|
|
int ret;
|
|
|
|
ret = spu_acquire(ctx);
|
|
if (ret)
|
|
return ret;
|
|
ctx->ops->signal2_type_set(ctx, val);
|
|
spu_release(ctx);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static u64 spufs_signal2_type_get(struct spu_context *ctx)
|
|
{
|
|
return ctx->ops->signal2_type_get(ctx);
|
|
}
|
|
DEFINE_SPUFS_ATTRIBUTE(spufs_signal2_type, spufs_signal2_type_get,
|
|
spufs_signal2_type_set, "%llu", SPU_ATTR_ACQUIRE);
|
|
|
|
#if SPUFS_MMAP_4K
|
|
static unsigned long spufs_mss_mmap_nopfn(struct vm_area_struct *vma,
|
|
unsigned long address)
|
|
{
|
|
return spufs_ps_nopfn(vma, address, 0x0000, 0x1000);
|
|
}
|
|
|
|
static struct vm_operations_struct spufs_mss_mmap_vmops = {
|
|
.nopfn = spufs_mss_mmap_nopfn,
|
|
};
|
|
|
|
/*
|
|
* mmap support for problem state MFC DMA area [0x0000 - 0x0fff].
|
|
*/
|
|
static int spufs_mss_mmap(struct file *file, struct vm_area_struct *vma)
|
|
{
|
|
if (!(vma->vm_flags & VM_SHARED))
|
|
return -EINVAL;
|
|
|
|
vma->vm_flags |= VM_IO | VM_PFNMAP;
|
|
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;
|
|
}
|
|
#else /* SPUFS_MMAP_4K */
|
|
#define spufs_mss_mmap NULL
|
|
#endif /* !SPUFS_MMAP_4K */
|
|
|
|
static int spufs_mss_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 = i->i_ctx;
|
|
|
|
mutex_lock(&ctx->mapping_lock);
|
|
if (!i->i_openers++)
|
|
ctx->mss = inode->i_mapping;
|
|
mutex_unlock(&ctx->mapping_lock);
|
|
return nonseekable_open(inode, file);
|
|
}
|
|
|
|
static int
|
|
spufs_mss_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct spufs_inode_info *i = SPUFS_I(inode);
|
|
struct spu_context *ctx = i->i_ctx;
|
|
|
|
mutex_lock(&ctx->mapping_lock);
|
|
if (!--i->i_openers)
|
|
ctx->mss = NULL;
|
|
mutex_unlock(&ctx->mapping_lock);
|
|
return 0;
|
|
}
|
|
|
|
static const struct file_operations spufs_mss_fops = {
|
|
.open = spufs_mss_open,
|
|
.release = spufs_mss_release,
|
|
.mmap = spufs_mss_mmap,
|
|
};
|
|
|
|
static unsigned long spufs_psmap_mmap_nopfn(struct vm_area_struct *vma,
|
|
unsigned long address)
|
|
{
|
|
return spufs_ps_nopfn(vma, address, 0x0000, 0x20000);
|
|
}
|
|
|
|
static struct vm_operations_struct spufs_psmap_mmap_vmops = {
|
|
.nopfn = spufs_psmap_mmap_nopfn,
|
|
};
|
|
|
|
/*
|
|
* mmap support for full problem state area [0x00000 - 0x1ffff].
|
|
*/
|
|
static int spufs_psmap_mmap(struct file *file, struct vm_area_struct *vma)
|
|
{
|
|
if (!(vma->vm_flags & VM_SHARED))
|
|
return -EINVAL;
|
|
|
|
vma->vm_flags |= VM_IO | VM_PFNMAP;
|
|
vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
|
|
| _PAGE_NO_CACHE | _PAGE_GUARDED);
|
|
|
|
vma->vm_ops = &spufs_psmap_mmap_vmops;
|
|
return 0;
|
|
}
|
|
|
|
static int spufs_psmap_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct spufs_inode_info *i = SPUFS_I(inode);
|
|
struct spu_context *ctx = i->i_ctx;
|
|
|
|
mutex_lock(&ctx->mapping_lock);
|
|
file->private_data = i->i_ctx;
|
|
if (!i->i_openers++)
|
|
ctx->psmap = inode->i_mapping;
|
|
mutex_unlock(&ctx->mapping_lock);
|
|
return nonseekable_open(inode, file);
|
|
}
|
|
|
|
static int
|
|
spufs_psmap_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct spufs_inode_info *i = SPUFS_I(inode);
|
|
struct spu_context *ctx = i->i_ctx;
|
|
|
|
mutex_lock(&ctx->mapping_lock);
|
|
if (!--i->i_openers)
|
|
ctx->psmap = NULL;
|
|
mutex_unlock(&ctx->mapping_lock);
|
|
return 0;
|
|
}
|
|
|
|
static const struct file_operations spufs_psmap_fops = {
|
|
.open = spufs_psmap_open,
|
|
.release = spufs_psmap_release,
|
|
.mmap = spufs_psmap_mmap,
|
|
};
|
|
|
|
|
|
#if SPUFS_MMAP_4K
|
|
static unsigned long spufs_mfc_mmap_nopfn(struct vm_area_struct *vma,
|
|
unsigned long address)
|
|
{
|
|
return spufs_ps_nopfn(vma, address, 0x3000, 0x1000);
|
|
}
|
|
|
|
static struct vm_operations_struct spufs_mfc_mmap_vmops = {
|
|
.nopfn = spufs_mfc_mmap_nopfn,
|
|
};
|
|
|
|
/*
|
|
* mmap support for problem state MFC DMA area [0x0000 - 0x0fff].
|
|
*/
|
|
static int spufs_mfc_mmap(struct file *file, struct vm_area_struct *vma)
|
|
{
|
|
if (!(vma->vm_flags & VM_SHARED))
|
|
return -EINVAL;
|
|
|
|
vma->vm_flags |= VM_IO | VM_PFNMAP;
|
|
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;
|
|
}
|
|
#else /* SPUFS_MMAP_4K */
|
|
#define spufs_mfc_mmap NULL
|
|
#endif /* !SPUFS_MMAP_4K */
|
|
|
|
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;
|
|
|
|
mutex_lock(&ctx->mapping_lock);
|
|
file->private_data = ctx;
|
|
if (!i->i_openers++)
|
|
ctx->mfc = inode->i_mapping;
|
|
mutex_unlock(&ctx->mapping_lock);
|
|
return nonseekable_open(inode, file);
|
|
}
|
|
|
|
static int
|
|
spufs_mfc_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct spufs_inode_info *i = SPUFS_I(inode);
|
|
struct spu_context *ctx = i->i_ctx;
|
|
|
|
mutex_lock(&ctx->mapping_lock);
|
|
if (!--i->i_openers)
|
|
ctx->mfc = NULL;
|
|
mutex_unlock(&ctx->mapping_lock);
|
|
return 0;
|
|
}
|
|
|
|
/* interrupt-level mfc callback function. */
|
|
void spufs_mfc_callback(struct spu *spu)
|
|
{
|
|
struct spu_context *ctx = spu->ctx;
|
|
|
|
if (!ctx)
|
|
return;
|
|
|
|
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;
|
|
|
|
ret = spu_acquire(ctx);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = -EINVAL;
|
|
if (file->f_flags & O_NONBLOCK) {
|
|
status = ctx->ops->read_mfc_tagstatus(ctx);
|
|
if (!(status & ctx->tagwait))
|
|
ret = -EAGAIN;
|
|
else
|
|
/* XXX(hch): shouldn't we clear ret here? */
|
|
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;
|
|
|
|
ret = spu_acquire(ctx);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = spufs_wait(ctx->run_wq, ctx->state == SPU_STATE_RUNNABLE);
|
|
if (ret)
|
|
goto out;
|
|
|
|
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;
|
|
}
|
|
|
|
if (ret)
|
|
goto out_unlock;
|
|
|
|
ctx->tagwait |= 1 << cmd.tag;
|
|
ret = size;
|
|
|
|
out_unlock:
|
|
spu_release(ctx);
|
|
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;
|
|
|
|
poll_wait(file, &ctx->mfc_wq, wait);
|
|
|
|
/*
|
|
* For now keep this uninterruptible and also ignore the rule
|
|
* that poll should not sleep. Will be fixed later.
|
|
*/
|
|
mutex_lock(&ctx->state_mutex);
|
|
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);
|
|
|
|
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;
|
|
|
|
ret = spu_acquire(ctx);
|
|
if (ret)
|
|
return ret;
|
|
#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 const struct file_operations spufs_mfc_fops = {
|
|
.open = spufs_mfc_open,
|
|
.release = spufs_mfc_release,
|
|
.read = spufs_mfc_read,
|
|
.write = spufs_mfc_write,
|
|
.poll = spufs_mfc_poll,
|
|
.flush = spufs_mfc_flush,
|
|
.fsync = spufs_mfc_fsync,
|
|
.fasync = spufs_mfc_fasync,
|
|
.mmap = spufs_mfc_mmap,
|
|
};
|
|
|
|
static int spufs_npc_set(void *data, u64 val)
|
|
{
|
|
struct spu_context *ctx = data;
|
|
int ret;
|
|
|
|
ret = spu_acquire(ctx);
|
|
if (ret)
|
|
return ret;
|
|
ctx->ops->npc_write(ctx, val);
|
|
spu_release(ctx);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static u64 spufs_npc_get(struct spu_context *ctx)
|
|
{
|
|
return ctx->ops->npc_read(ctx);
|
|
}
|
|
DEFINE_SPUFS_ATTRIBUTE(spufs_npc_ops, spufs_npc_get, spufs_npc_set,
|
|
"0x%llx\n", SPU_ATTR_ACQUIRE);
|
|
|
|
static int spufs_decr_set(void *data, u64 val)
|
|
{
|
|
struct spu_context *ctx = data;
|
|
struct spu_lscsa *lscsa = ctx->csa.lscsa;
|
|
int ret;
|
|
|
|
ret = spu_acquire_saved(ctx);
|
|
if (ret)
|
|
return ret;
|
|
lscsa->decr.slot[0] = (u32) val;
|
|
spu_release_saved(ctx);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static u64 spufs_decr_get(struct spu_context *ctx)
|
|
{
|
|
struct spu_lscsa *lscsa = ctx->csa.lscsa;
|
|
return lscsa->decr.slot[0];
|
|
}
|
|
DEFINE_SPUFS_ATTRIBUTE(spufs_decr_ops, spufs_decr_get, spufs_decr_set,
|
|
"0x%llx\n", SPU_ATTR_ACQUIRE_SAVED);
|
|
|
|
static int spufs_decr_status_set(void *data, u64 val)
|
|
{
|
|
struct spu_context *ctx = data;
|
|
int ret;
|
|
|
|
ret = spu_acquire_saved(ctx);
|
|
if (ret)
|
|
return ret;
|
|
if (val)
|
|
ctx->csa.priv2.mfc_control_RW |= MFC_CNTL_DECREMENTER_RUNNING;
|
|
else
|
|
ctx->csa.priv2.mfc_control_RW &= ~MFC_CNTL_DECREMENTER_RUNNING;
|
|
spu_release_saved(ctx);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static u64 spufs_decr_status_get(struct spu_context *ctx)
|
|
{
|
|
if (ctx->csa.priv2.mfc_control_RW & MFC_CNTL_DECREMENTER_RUNNING)
|
|
return SPU_DECR_STATUS_RUNNING;
|
|
else
|
|
return 0;
|
|
}
|
|
DEFINE_SPUFS_ATTRIBUTE(spufs_decr_status_ops, spufs_decr_status_get,
|
|
spufs_decr_status_set, "0x%llx\n",
|
|
SPU_ATTR_ACQUIRE_SAVED);
|
|
|
|
static int spufs_event_mask_set(void *data, u64 val)
|
|
{
|
|
struct spu_context *ctx = data;
|
|
struct spu_lscsa *lscsa = ctx->csa.lscsa;
|
|
int ret;
|
|
|
|
ret = spu_acquire_saved(ctx);
|
|
if (ret)
|
|
return ret;
|
|
lscsa->event_mask.slot[0] = (u32) val;
|
|
spu_release_saved(ctx);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static u64 spufs_event_mask_get(struct spu_context *ctx)
|
|
{
|
|
struct spu_lscsa *lscsa = ctx->csa.lscsa;
|
|
return lscsa->event_mask.slot[0];
|
|
}
|
|
|
|
DEFINE_SPUFS_ATTRIBUTE(spufs_event_mask_ops, spufs_event_mask_get,
|
|
spufs_event_mask_set, "0x%llx\n",
|
|
SPU_ATTR_ACQUIRE_SAVED);
|
|
|
|
static u64 spufs_event_status_get(struct spu_context *ctx)
|
|
{
|
|
struct spu_state *state = &ctx->csa;
|
|
u64 stat;
|
|
stat = state->spu_chnlcnt_RW[0];
|
|
if (stat)
|
|
return state->spu_chnldata_RW[0];
|
|
return 0;
|
|
}
|
|
DEFINE_SPUFS_ATTRIBUTE(spufs_event_status_ops, spufs_event_status_get,
|
|
NULL, "0x%llx\n", SPU_ATTR_ACQUIRE_SAVED)
|
|
|
|
static int spufs_srr0_set(void *data, u64 val)
|
|
{
|
|
struct spu_context *ctx = data;
|
|
struct spu_lscsa *lscsa = ctx->csa.lscsa;
|
|
int ret;
|
|
|
|
ret = spu_acquire_saved(ctx);
|
|
if (ret)
|
|
return ret;
|
|
lscsa->srr0.slot[0] = (u32) val;
|
|
spu_release_saved(ctx);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static u64 spufs_srr0_get(struct spu_context *ctx)
|
|
{
|
|
struct spu_lscsa *lscsa = ctx->csa.lscsa;
|
|
return lscsa->srr0.slot[0];
|
|
}
|
|
DEFINE_SPUFS_ATTRIBUTE(spufs_srr0_ops, spufs_srr0_get, spufs_srr0_set,
|
|
"0x%llx\n", SPU_ATTR_ACQUIRE_SAVED)
|
|
|
|
static u64 spufs_id_get(struct spu_context *ctx)
|
|
{
|
|
u64 num;
|
|
|
|
if (ctx->state == SPU_STATE_RUNNABLE)
|
|
num = ctx->spu->number;
|
|
else
|
|
num = (unsigned int)-1;
|
|
|
|
return num;
|
|
}
|
|
DEFINE_SPUFS_ATTRIBUTE(spufs_id_ops, spufs_id_get, NULL, "0x%llx\n",
|
|
SPU_ATTR_ACQUIRE)
|
|
|
|
static u64 spufs_object_id_get(struct spu_context *ctx)
|
|
{
|
|
/* FIXME: Should there really be no locking here? */
|
|
return ctx->object_id;
|
|
}
|
|
|
|
static int spufs_object_id_set(void *data, u64 id)
|
|
{
|
|
struct spu_context *ctx = data;
|
|
ctx->object_id = id;
|
|
|
|
return 0;
|
|
}
|
|
|
|
DEFINE_SPUFS_ATTRIBUTE(spufs_object_id_ops, spufs_object_id_get,
|
|
spufs_object_id_set, "0x%llx\n", SPU_ATTR_NOACQUIRE);
|
|
|
|
static u64 spufs_lslr_get(struct spu_context *ctx)
|
|
{
|
|
return ctx->csa.priv2.spu_lslr_RW;
|
|
}
|
|
DEFINE_SPUFS_ATTRIBUTE(spufs_lslr_ops, spufs_lslr_get, NULL, "0x%llx\n",
|
|
SPU_ATTR_ACQUIRE_SAVED);
|
|
|
|
static int spufs_info_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;
|
|
return 0;
|
|
}
|
|
|
|
static int spufs_caps_show(struct seq_file *s, void *private)
|
|
{
|
|
struct spu_context *ctx = s->private;
|
|
|
|
if (!(ctx->flags & SPU_CREATE_NOSCHED))
|
|
seq_puts(s, "sched\n");
|
|
if (!(ctx->flags & SPU_CREATE_ISOLATE))
|
|
seq_puts(s, "step\n");
|
|
return 0;
|
|
}
|
|
|
|
static int spufs_caps_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, spufs_caps_show, SPUFS_I(inode)->i_ctx);
|
|
}
|
|
|
|
static const struct file_operations spufs_caps_fops = {
|
|
.open = spufs_caps_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
static ssize_t __spufs_mbox_info_read(struct spu_context *ctx,
|
|
char __user *buf, size_t len, loff_t *pos)
|
|
{
|
|
u32 data;
|
|
|
|
/* EOF if there's no entry in the mbox */
|
|
if (!(ctx->csa.prob.mb_stat_R & 0x0000ff))
|
|
return 0;
|
|
|
|
data = ctx->csa.prob.pu_mb_R;
|
|
|
|
return simple_read_from_buffer(buf, len, pos, &data, sizeof data);
|
|
}
|
|
|
|
static ssize_t spufs_mbox_info_read(struct file *file, char __user *buf,
|
|
size_t len, loff_t *pos)
|
|
{
|
|
int ret;
|
|
struct spu_context *ctx = file->private_data;
|
|
|
|
if (!access_ok(VERIFY_WRITE, buf, len))
|
|
return -EFAULT;
|
|
|
|
ret = spu_acquire_saved(ctx);
|
|
if (ret)
|
|
return ret;
|
|
spin_lock(&ctx->csa.register_lock);
|
|
ret = __spufs_mbox_info_read(ctx, buf, len, pos);
|
|
spin_unlock(&ctx->csa.register_lock);
|
|
spu_release_saved(ctx);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct file_operations spufs_mbox_info_fops = {
|
|
.open = spufs_info_open,
|
|
.read = spufs_mbox_info_read,
|
|
.llseek = generic_file_llseek,
|
|
};
|
|
|
|
static ssize_t __spufs_ibox_info_read(struct spu_context *ctx,
|
|
char __user *buf, size_t len, loff_t *pos)
|
|
{
|
|
u32 data;
|
|
|
|
/* EOF if there's no entry in the ibox */
|
|
if (!(ctx->csa.prob.mb_stat_R & 0xff0000))
|
|
return 0;
|
|
|
|
data = ctx->csa.priv2.puint_mb_R;
|
|
|
|
return simple_read_from_buffer(buf, len, pos, &data, sizeof data);
|
|
}
|
|
|
|
static ssize_t spufs_ibox_info_read(struct file *file, char __user *buf,
|
|
size_t len, loff_t *pos)
|
|
{
|
|
struct spu_context *ctx = file->private_data;
|
|
int ret;
|
|
|
|
if (!access_ok(VERIFY_WRITE, buf, len))
|
|
return -EFAULT;
|
|
|
|
ret = spu_acquire_saved(ctx);
|
|
if (ret)
|
|
return ret;
|
|
spin_lock(&ctx->csa.register_lock);
|
|
ret = __spufs_ibox_info_read(ctx, buf, len, pos);
|
|
spin_unlock(&ctx->csa.register_lock);
|
|
spu_release_saved(ctx);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct file_operations spufs_ibox_info_fops = {
|
|
.open = spufs_info_open,
|
|
.read = spufs_ibox_info_read,
|
|
.llseek = generic_file_llseek,
|
|
};
|
|
|
|
static ssize_t __spufs_wbox_info_read(struct spu_context *ctx,
|
|
char __user *buf, size_t len, loff_t *pos)
|
|
{
|
|
int i, cnt;
|
|
u32 data[4];
|
|
u32 wbox_stat;
|
|
|
|
wbox_stat = ctx->csa.prob.mb_stat_R;
|
|
cnt = 4 - ((wbox_stat & 0x00ff00) >> 8);
|
|
for (i = 0; i < cnt; i++) {
|
|
data[i] = ctx->csa.spu_mailbox_data[i];
|
|
}
|
|
|
|
return simple_read_from_buffer(buf, len, pos, &data,
|
|
cnt * sizeof(u32));
|
|
}
|
|
|
|
static ssize_t spufs_wbox_info_read(struct file *file, char __user *buf,
|
|
size_t len, loff_t *pos)
|
|
{
|
|
struct spu_context *ctx = file->private_data;
|
|
int ret;
|
|
|
|
if (!access_ok(VERIFY_WRITE, buf, len))
|
|
return -EFAULT;
|
|
|
|
ret = spu_acquire_saved(ctx);
|
|
if (ret)
|
|
return ret;
|
|
spin_lock(&ctx->csa.register_lock);
|
|
ret = __spufs_wbox_info_read(ctx, buf, len, pos);
|
|
spin_unlock(&ctx->csa.register_lock);
|
|
spu_release_saved(ctx);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct file_operations spufs_wbox_info_fops = {
|
|
.open = spufs_info_open,
|
|
.read = spufs_wbox_info_read,
|
|
.llseek = generic_file_llseek,
|
|
};
|
|
|
|
static ssize_t __spufs_dma_info_read(struct spu_context *ctx,
|
|
char __user *buf, size_t len, loff_t *pos)
|
|
{
|
|
struct spu_dma_info info;
|
|
struct mfc_cq_sr *qp, *spuqp;
|
|
int i;
|
|
|
|
info.dma_info_type = ctx->csa.priv2.spu_tag_status_query_RW;
|
|
info.dma_info_mask = ctx->csa.lscsa->tag_mask.slot[0];
|
|
info.dma_info_status = ctx->csa.spu_chnldata_RW[24];
|
|
info.dma_info_stall_and_notify = ctx->csa.spu_chnldata_RW[25];
|
|
info.dma_info_atomic_command_status = ctx->csa.spu_chnldata_RW[27];
|
|
for (i = 0; i < 16; i++) {
|
|
qp = &info.dma_info_command_data[i];
|
|
spuqp = &ctx->csa.priv2.spuq[i];
|
|
|
|
qp->mfc_cq_data0_RW = spuqp->mfc_cq_data0_RW;
|
|
qp->mfc_cq_data1_RW = spuqp->mfc_cq_data1_RW;
|
|
qp->mfc_cq_data2_RW = spuqp->mfc_cq_data2_RW;
|
|
qp->mfc_cq_data3_RW = spuqp->mfc_cq_data3_RW;
|
|
}
|
|
|
|
return simple_read_from_buffer(buf, len, pos, &info,
|
|
sizeof info);
|
|
}
|
|
|
|
static ssize_t spufs_dma_info_read(struct file *file, char __user *buf,
|
|
size_t len, loff_t *pos)
|
|
{
|
|
struct spu_context *ctx = file->private_data;
|
|
int ret;
|
|
|
|
if (!access_ok(VERIFY_WRITE, buf, len))
|
|
return -EFAULT;
|
|
|
|
ret = spu_acquire_saved(ctx);
|
|
if (ret)
|
|
return ret;
|
|
spin_lock(&ctx->csa.register_lock);
|
|
ret = __spufs_dma_info_read(ctx, buf, len, pos);
|
|
spin_unlock(&ctx->csa.register_lock);
|
|
spu_release_saved(ctx);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct file_operations spufs_dma_info_fops = {
|
|
.open = spufs_info_open,
|
|
.read = spufs_dma_info_read,
|
|
};
|
|
|
|
static ssize_t __spufs_proxydma_info_read(struct spu_context *ctx,
|
|
char __user *buf, size_t len, loff_t *pos)
|
|
{
|
|
struct spu_proxydma_info info;
|
|
struct mfc_cq_sr *qp, *puqp;
|
|
int ret = sizeof info;
|
|
int i;
|
|
|
|
if (len < ret)
|
|
return -EINVAL;
|
|
|
|
if (!access_ok(VERIFY_WRITE, buf, len))
|
|
return -EFAULT;
|
|
|
|
info.proxydma_info_type = ctx->csa.prob.dma_querytype_RW;
|
|
info.proxydma_info_mask = ctx->csa.prob.dma_querymask_RW;
|
|
info.proxydma_info_status = ctx->csa.prob.dma_tagstatus_R;
|
|
for (i = 0; i < 8; i++) {
|
|
qp = &info.proxydma_info_command_data[i];
|
|
puqp = &ctx->csa.priv2.puq[i];
|
|
|
|
qp->mfc_cq_data0_RW = puqp->mfc_cq_data0_RW;
|
|
qp->mfc_cq_data1_RW = puqp->mfc_cq_data1_RW;
|
|
qp->mfc_cq_data2_RW = puqp->mfc_cq_data2_RW;
|
|
qp->mfc_cq_data3_RW = puqp->mfc_cq_data3_RW;
|
|
}
|
|
|
|
return simple_read_from_buffer(buf, len, pos, &info,
|
|
sizeof info);
|
|
}
|
|
|
|
static ssize_t spufs_proxydma_info_read(struct file *file, char __user *buf,
|
|
size_t len, loff_t *pos)
|
|
{
|
|
struct spu_context *ctx = file->private_data;
|
|
int ret;
|
|
|
|
ret = spu_acquire_saved(ctx);
|
|
if (ret)
|
|
return ret;
|
|
spin_lock(&ctx->csa.register_lock);
|
|
ret = __spufs_proxydma_info_read(ctx, buf, len, pos);
|
|
spin_unlock(&ctx->csa.register_lock);
|
|
spu_release_saved(ctx);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct file_operations spufs_proxydma_info_fops = {
|
|
.open = spufs_info_open,
|
|
.read = spufs_proxydma_info_read,
|
|
};
|
|
|
|
static int spufs_show_tid(struct seq_file *s, void *private)
|
|
{
|
|
struct spu_context *ctx = s->private;
|
|
|
|
seq_printf(s, "%d\n", ctx->tid);
|
|
return 0;
|
|
}
|
|
|
|
static int spufs_tid_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, spufs_show_tid, SPUFS_I(inode)->i_ctx);
|
|
}
|
|
|
|
static const struct file_operations spufs_tid_fops = {
|
|
.open = spufs_tid_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
static const char *ctx_state_names[] = {
|
|
"user", "system", "iowait", "loaded"
|
|
};
|
|
|
|
static unsigned long long spufs_acct_time(struct spu_context *ctx,
|
|
enum spu_utilization_state state)
|
|
{
|
|
struct timespec ts;
|
|
unsigned long long time = ctx->stats.times[state];
|
|
|
|
/*
|
|
* In general, utilization statistics are updated by the controlling
|
|
* thread as the spu context moves through various well defined
|
|
* state transitions, but if the context is lazily loaded its
|
|
* utilization statistics are not updated as the controlling thread
|
|
* is not tightly coupled with the execution of the spu context. We
|
|
* calculate and apply the time delta from the last recorded state
|
|
* of the spu context.
|
|
*/
|
|
if (ctx->spu && ctx->stats.util_state == state) {
|
|
ktime_get_ts(&ts);
|
|
time += timespec_to_ns(&ts) - ctx->stats.tstamp;
|
|
}
|
|
|
|
return time / NSEC_PER_MSEC;
|
|
}
|
|
|
|
static unsigned long long spufs_slb_flts(struct spu_context *ctx)
|
|
{
|
|
unsigned long long slb_flts = ctx->stats.slb_flt;
|
|
|
|
if (ctx->state == SPU_STATE_RUNNABLE) {
|
|
slb_flts += (ctx->spu->stats.slb_flt -
|
|
ctx->stats.slb_flt_base);
|
|
}
|
|
|
|
return slb_flts;
|
|
}
|
|
|
|
static unsigned long long spufs_class2_intrs(struct spu_context *ctx)
|
|
{
|
|
unsigned long long class2_intrs = ctx->stats.class2_intr;
|
|
|
|
if (ctx->state == SPU_STATE_RUNNABLE) {
|
|
class2_intrs += (ctx->spu->stats.class2_intr -
|
|
ctx->stats.class2_intr_base);
|
|
}
|
|
|
|
return class2_intrs;
|
|
}
|
|
|
|
|
|
static int spufs_show_stat(struct seq_file *s, void *private)
|
|
{
|
|
struct spu_context *ctx = s->private;
|
|
int ret;
|
|
|
|
ret = spu_acquire(ctx);
|
|
if (ret)
|
|
return ret;
|
|
|
|
seq_printf(s, "%s %llu %llu %llu %llu "
|
|
"%llu %llu %llu %llu %llu %llu %llu %llu\n",
|
|
ctx_state_names[ctx->stats.util_state],
|
|
spufs_acct_time(ctx, SPU_UTIL_USER),
|
|
spufs_acct_time(ctx, SPU_UTIL_SYSTEM),
|
|
spufs_acct_time(ctx, SPU_UTIL_IOWAIT),
|
|
spufs_acct_time(ctx, SPU_UTIL_IDLE_LOADED),
|
|
ctx->stats.vol_ctx_switch,
|
|
ctx->stats.invol_ctx_switch,
|
|
spufs_slb_flts(ctx),
|
|
ctx->stats.hash_flt,
|
|
ctx->stats.min_flt,
|
|
ctx->stats.maj_flt,
|
|
spufs_class2_intrs(ctx),
|
|
ctx->stats.libassist);
|
|
spu_release(ctx);
|
|
return 0;
|
|
}
|
|
|
|
static int spufs_stat_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, spufs_show_stat, SPUFS_I(inode)->i_ctx);
|
|
}
|
|
|
|
static const struct file_operations spufs_stat_fops = {
|
|
.open = spufs_stat_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
|
|
struct tree_descr spufs_dir_contents[] = {
|
|
{ "capabilities", &spufs_caps_fops, 0444, },
|
|
{ "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, },
|
|
{ "cntl", &spufs_cntl_fops, 0666, },
|
|
{ "fpcr", &spufs_fpcr_fops, 0666, },
|
|
{ "lslr", &spufs_lslr_ops, 0444, },
|
|
{ "mfc", &spufs_mfc_fops, 0666, },
|
|
{ "mss", &spufs_mss_fops, 0666, },
|
|
{ "npc", &spufs_npc_ops, 0666, },
|
|
{ "srr0", &spufs_srr0_ops, 0666, },
|
|
{ "decr", &spufs_decr_ops, 0666, },
|
|
{ "decr_status", &spufs_decr_status_ops, 0666, },
|
|
{ "event_mask", &spufs_event_mask_ops, 0666, },
|
|
{ "event_status", &spufs_event_status_ops, 0444, },
|
|
{ "psmap", &spufs_psmap_fops, 0666, },
|
|
{ "phys-id", &spufs_id_ops, 0666, },
|
|
{ "object-id", &spufs_object_id_ops, 0666, },
|
|
{ "mbox_info", &spufs_mbox_info_fops, 0444, },
|
|
{ "ibox_info", &spufs_ibox_info_fops, 0444, },
|
|
{ "wbox_info", &spufs_wbox_info_fops, 0444, },
|
|
{ "dma_info", &spufs_dma_info_fops, 0444, },
|
|
{ "proxydma_info", &spufs_proxydma_info_fops, 0444, },
|
|
{ "tid", &spufs_tid_fops, 0444, },
|
|
{ "stat", &spufs_stat_fops, 0444, },
|
|
{},
|
|
};
|
|
|
|
struct tree_descr spufs_dir_nosched_contents[] = {
|
|
{ "capabilities", &spufs_caps_fops, 0444, },
|
|
{ "mem", &spufs_mem_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_nosched_fops, 0222, },
|
|
{ "signal2", &spufs_signal2_nosched_fops, 0222, },
|
|
{ "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, },
|
|
{ "psmap", &spufs_psmap_fops, 0666, },
|
|
{ "phys-id", &spufs_id_ops, 0666, },
|
|
{ "object-id", &spufs_object_id_ops, 0666, },
|
|
{ "tid", &spufs_tid_fops, 0444, },
|
|
{ "stat", &spufs_stat_fops, 0444, },
|
|
{},
|
|
};
|
|
|
|
struct spufs_coredump_reader spufs_coredump_read[] = {
|
|
{ "regs", __spufs_regs_read, NULL, sizeof(struct spu_reg128[128])},
|
|
{ "fpcr", __spufs_fpcr_read, NULL, sizeof(struct spu_reg128) },
|
|
{ "lslr", NULL, spufs_lslr_get, 19 },
|
|
{ "decr", NULL, spufs_decr_get, 19 },
|
|
{ "decr_status", NULL, spufs_decr_status_get, 19 },
|
|
{ "mem", __spufs_mem_read, NULL, LS_SIZE, },
|
|
{ "signal1", __spufs_signal1_read, NULL, sizeof(u32) },
|
|
{ "signal1_type", NULL, spufs_signal1_type_get, 19 },
|
|
{ "signal2", __spufs_signal2_read, NULL, sizeof(u32) },
|
|
{ "signal2_type", NULL, spufs_signal2_type_get, 19 },
|
|
{ "event_mask", NULL, spufs_event_mask_get, 19 },
|
|
{ "event_status", NULL, spufs_event_status_get, 19 },
|
|
{ "mbox_info", __spufs_mbox_info_read, NULL, sizeof(u32) },
|
|
{ "ibox_info", __spufs_ibox_info_read, NULL, sizeof(u32) },
|
|
{ "wbox_info", __spufs_wbox_info_read, NULL, 4 * sizeof(u32)},
|
|
{ "dma_info", __spufs_dma_info_read, NULL, sizeof(struct spu_dma_info)},
|
|
{ "proxydma_info", __spufs_proxydma_info_read,
|
|
NULL, sizeof(struct spu_proxydma_info)},
|
|
{ "object-id", NULL, spufs_object_id_get, 19 },
|
|
{ "npc", NULL, spufs_npc_get, 19 },
|
|
{ NULL },
|
|
};
|