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Created a seperate fops structure so that the code only changes mmap for

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the file its operating on
This commit is contained in:
Jeff Hartmann 2000-04-10 16:04:56 +00:00
parent 136e86822a
commit 5aa43c056c
4 changed files with 32 additions and 4 deletions
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17
linux-core/i810_dma.c
View file

@ -138,6 +138,17 @@ static int i810_freelist_put(drm_device_t *dev, drm_buf_t *buf)
return 0;
}
static struct file_operations i810_buffer_fops = {
open: i810_open,
flush: drm_flush,
release: i810_release,
ioctl: i810_ioctl,
mmap: i810_mmap_buffers,
read: drm_read,
fasync: drm_fasync,
poll: drm_poll,
};
int i810_mmap_buffers(struct file *filp, struct vm_area_struct *vma)
{
vma->vm_flags |= VM_IO;
@ -152,15 +163,17 @@ static int i810_map_buffer(drm_buf_t *buf, struct file *filp)
{
drm_i810_buf_priv_t *buf_priv = buf->dev_private;
int retcode = 0;
struct file_operations *old_fops;
if(buf_priv->currently_mapped == I810_BUF_MAPPED) return -EINVAL;
down(&current->mm->mmap_sem);
filp->f_op->mmap = i810_mmap_buffers;
old_fops = filp->f_op;
filp->f_op = &i810_buffer_fops;
buf_priv->virtual = (void *)do_mmap(filp, 0, buf->total,
PROT_READ|PROT_WRITE,
MAP_SHARED,
buf->bus_address);
filp->f_op->mmap = drm_mmap;
filp->f_op = old_fops;
if ((unsigned long)buf_priv->virtual > -1024UL) {
/* Real error */
DRM_DEBUG("mmap error\n");

1
linux-core/i810_drv.h
View file

@ -86,6 +86,7 @@ extern int i810_flush_ioctl(struct inode *inode, struct file *filp,
extern void i810_reclaim_buffers(drm_device_t *dev, pid_t pid);
extern int i810_getage(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg);
extern int i810_mmap_buffers(struct file *filp, struct vm_area_struct *vma);
/* i810_bufs.c */

17
linux/i810_dma.c
View file

@ -138,6 +138,17 @@ static int i810_freelist_put(drm_device_t *dev, drm_buf_t *buf)
return 0;
}
static struct file_operations i810_buffer_fops = {
open: i810_open,
flush: drm_flush,
release: i810_release,
ioctl: i810_ioctl,
mmap: i810_mmap_buffers,
read: drm_read,
fasync: drm_fasync,
poll: drm_poll,
};
int i810_mmap_buffers(struct file *filp, struct vm_area_struct *vma)
{
vma->vm_flags |= VM_IO;
@ -152,15 +163,17 @@ static int i810_map_buffer(drm_buf_t *buf, struct file *filp)
{
drm_i810_buf_priv_t *buf_priv = buf->dev_private;
int retcode = 0;
struct file_operations *old_fops;
if(buf_priv->currently_mapped == I810_BUF_MAPPED) return -EINVAL;
down(&current->mm->mmap_sem);
filp->f_op->mmap = i810_mmap_buffers;
old_fops = filp->f_op;
filp->f_op = &i810_buffer_fops;
buf_priv->virtual = (void *)do_mmap(filp, 0, buf->total,
PROT_READ|PROT_WRITE,
MAP_SHARED,
buf->bus_address);
filp->f_op->mmap = drm_mmap;
filp->f_op = old_fops;
if ((unsigned long)buf_priv->virtual > -1024UL) {
/* Real error */
DRM_DEBUG("mmap error\n");

1
linux/i810_drv.h
View file

@ -86,6 +86,7 @@ extern int i810_flush_ioctl(struct inode *inode, struct file *filp,
extern void i810_reclaim_buffers(drm_device_t *dev, pid_t pid);
extern int i810_getage(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg);
extern int i810_mmap_buffers(struct file *filp, struct vm_area_struct *vma);
/* i810_bufs.c */