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drm/vmwgfx: Use a per-device semaphore for reservation protection

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Don't use a per-master semaphore (ttm lock) for reservation protection, but
rather a per-device semaphore. This is needed since clients connecting using
render nodes aren't master aware.

The ttm lock used should probably be replaced with a reader-write semaphore
once the function down_xx_interruptible() is available.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
This commit is contained in:
Thomas Hellstrom
2014-02-27 12:34:51 +01:00
parent 4beb6d9fa6
commit 294adf7d86
11 changed files with 46 additions and 58 deletions
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10
drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c
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@@ -226,7 +226,6 @@ int vmw_present_ioctl(struct drm_device *dev, void *data,
struct drm_vmw_present_arg *arg =
(struct drm_vmw_present_arg *)data;
struct vmw_surface *surface;
struct vmw_master *vmaster = vmw_master(file_priv->master);
struct drm_vmw_rect __user *clips_ptr;
struct drm_vmw_rect *clips = NULL;
struct drm_framebuffer *fb;
@@ -271,7 +270,7 @@ int vmw_present_ioctl(struct drm_device *dev, void *data,
}
vfb = vmw_framebuffer_to_vfb(fb);
ret = ttm_read_lock(&vmaster->lock, true);
ret = ttm_read_lock(&dev_priv->reservation_sem, true);
if (unlikely(ret != 0))
goto out_no_ttm_lock;
@@ -291,7 +290,7 @@ int vmw_present_ioctl(struct drm_device *dev, void *data,
vmw_surface_unreference(&surface);
out_no_surface:
ttm_read_unlock(&vmaster->lock);
ttm_read_unlock(&dev_priv->reservation_sem);
out_no_ttm_lock:
drm_framebuffer_unreference(fb);
out_no_fb:
@@ -311,7 +310,6 @@ int vmw_present_readback_ioctl(struct drm_device *dev, void *data,
struct drm_vmw_fence_rep __user *user_fence_rep =
(struct drm_vmw_fence_rep __user *)
(unsigned long)arg->fence_rep;
struct vmw_master *vmaster = vmw_master(file_priv->master);
struct drm_vmw_rect __user *clips_ptr;
struct drm_vmw_rect *clips = NULL;
struct drm_framebuffer *fb;
@@ -361,7 +359,7 @@ int vmw_present_readback_ioctl(struct drm_device *dev, void *data,
goto out_no_ttm_lock;
}
ret = ttm_read_lock(&vmaster->lock, true);
ret = ttm_read_lock(&dev_priv->reservation_sem, true);
if (unlikely(ret != 0))
goto out_no_ttm_lock;
@@ -369,7 +367,7 @@ int vmw_present_readback_ioctl(struct drm_device *dev, void *data,
vfb, user_fence_rep,
clips, num_clips);
ttm_read_unlock(&vmaster->lock);
ttm_read_unlock(&dev_priv->reservation_sem);
out_no_ttm_lock:
drm_framebuffer_unreference(fb);
out_no_fb: