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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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14
drivers/gpu/drm/vmwgfx/vmwgfx_surface.c
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@@ -697,7 +697,6 @@ int vmw_surface_define_ioctl(struct drm_device *dev, void *data,
struct vmw_surface_offset *cur_offset;
uint32_t num_sizes;
uint32_t size;
struct vmw_master *vmaster = vmw_master(file_priv->master);
const struct svga3d_surface_desc *desc;
if (unlikely(vmw_user_surface_size == 0))
@@ -723,7 +722,7 @@ int vmw_surface_define_ioctl(struct drm_device *dev, void *data,
return -EINVAL;
}
ret = ttm_read_lock(&vmaster->lock, true);
ret = ttm_read_lock(&dev_priv->reservation_sem, true);
if (unlikely(ret != 0))
return ret;
@@ -862,7 +861,7 @@ int vmw_surface_define_ioctl(struct drm_device *dev, void *data,
rep->sid = user_srf->prime.base.hash.key;
vmw_resource_unreference(&res);
ttm_read_unlock(&vmaster->lock);
ttm_read_unlock(&dev_priv->reservation_sem);
return 0;
out_no_copy:
kfree(srf->offsets);
@@ -873,7 +872,7 @@ out_no_sizes:
out_no_user_srf:
ttm_mem_global_free(vmw_mem_glob(dev_priv), size);
out_unlock:
ttm_read_unlock(&vmaster->lock);
ttm_read_unlock(&dev_priv->reservation_sem);
return ret;
}
@@ -1173,7 +1172,6 @@ int vmw_gb_surface_define_ioctl(struct drm_device *dev, void *data,
struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
int ret;
uint32_t size;
struct vmw_master *vmaster = vmw_master(file_priv->master);
const struct svga3d_surface_desc *desc;
uint32_t backup_handle;
@@ -1189,7 +1187,7 @@ int vmw_gb_surface_define_ioctl(struct drm_device *dev, void *data,
return -EINVAL;
}
ret = ttm_read_lock(&vmaster->lock, true);
ret = ttm_read_lock(&dev_priv->reservation_sem, true);
if (unlikely(ret != 0))
return ret;
@@ -1283,12 +1281,12 @@ int vmw_gb_surface_define_ioctl(struct drm_device *dev, void *data,
vmw_resource_unreference(&res);
ttm_read_unlock(&vmaster->lock);
ttm_read_unlock(&dev_priv->reservation_sem);
return 0;
out_no_user_srf:
ttm_mem_global_free(vmw_mem_glob(dev_priv), size);
out_unlock:
ttm_read_unlock(&vmaster->lock);
ttm_read_unlock(&dev_priv->reservation_sem);
return ret;
}