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vmwgfx: Wrap drm_read and drm_poll

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Make sure the device is processing the fifo when these functions are
called in case they might sleep waiting for an event.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Thomas Hellstrom 2011-10-10 12:23:27 +02:00 committed by Dave Airlie
parent 57c5ee79ac
commit 5438ae88d0
3 changed files with 49 additions and 1 deletions
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3
drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
View File

@ -1085,7 +1085,8 @@ static struct drm_driver driver = {
.release = drm_release,
.unlocked_ioctl = vmw_unlocked_ioctl,
.mmap = vmw_mmap,
.poll = drm_poll,
.poll = vmw_fops_poll,
.read = vmw_fops_read,
.fasync = drm_fasync,
#if defined(CONFIG_COMPAT)
.compat_ioctl = drm_compat_ioctl,

4
drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
View File

@ -469,6 +469,10 @@ extern int vmw_present_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
extern int vmw_present_readback_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
extern unsigned int vmw_fops_poll(struct file *filp,
struct poll_table_struct *wait);
extern ssize_t vmw_fops_read(struct file *filp, char __user *buffer,
size_t count, loff_t *offset);
/**
* Fifo utilities - vmwgfx_fifo.c

43
drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c
View File

@ -282,3 +282,46 @@ out_no_copy:
out_clips:
return ret;
}
/**
* vmw_fops_poll - wrapper around the drm_poll function
*
* @filp: See the linux fops poll documentation.
* @wait: See the linux fops poll documentation.
*
* Wrapper around the drm_poll function that makes sure the device is
* processing the fifo if drm_poll decides to wait.
*/
unsigned int vmw_fops_poll(struct file *filp, struct poll_table_struct *wait)
{
struct drm_file *file_priv = filp->private_data;
struct vmw_private *dev_priv =
vmw_priv(file_priv->minor->dev);
vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
return drm_poll(filp, wait);
}
/**
* vmw_fops_read - wrapper around the drm_read function
*
* @filp: See the linux fops read documentation.
* @buffer: See the linux fops read documentation.
* @count: See the linux fops read documentation.
* offset: See the linux fops read documentation.
*
* Wrapper around the drm_read function that makes sure the device is
* processing the fifo if drm_read decides to wait.
*/
ssize_t vmw_fops_read(struct file *filp, char __user *buffer,
size_t count, loff_t *offset)
{
struct drm_file *file_priv = filp->private_data;
struct vmw_private *dev_priv =
vmw_priv(file_priv->minor->dev);
vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
return drm_read(filp, buffer, count, offset);
}