The vmwgfx driver is the only remaining user of ttm_bo_mmap(). Inline the code. The internal helper ttm_bo_vm_lookup() is now also part of vmwgfx as vmw_bo_vm_lookup().
v2: * replace pr_err() with drm_err() (Zack)
Signed-off-by: Thomas Zimmermann tzimmermann@suse.de Reviewed-by: Zack Rusin zackr@vmware.com --- drivers/gpu/drm/vmwgfx/vmwgfx_ttm_glue.c | 56 ++++++++++++++++++++++-- 1 file changed, 53 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_glue.c b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_glue.c index cb9975889e2f..c8b6543b4e39 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_glue.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_glue.c @@ -27,6 +27,32 @@
#include "vmwgfx_drv.h"
+static struct ttm_buffer_object *vmw_bo_vm_lookup(struct ttm_device *bdev, + unsigned long offset, + unsigned long pages) +{ + struct vmw_private *dev_priv = container_of(bdev, struct vmw_private, bdev); + struct drm_device *drm = &dev_priv->drm; + struct drm_vma_offset_node *node; + struct ttm_buffer_object *bo = NULL; + + drm_vma_offset_lock_lookup(bdev->vma_manager); + + node = drm_vma_offset_lookup_locked(bdev->vma_manager, offset, pages); + if (likely(node)) { + bo = container_of(node, struct ttm_buffer_object, + base.vma_node); + bo = ttm_bo_get_unless_zero(bo); + } + + drm_vma_offset_unlock_lookup(bdev->vma_manager); + + if (!bo) + drm_err(drm, "Could not find buffer object to map\n"); + + return bo; +} + int vmw_mmap(struct file *filp, struct vm_area_struct *vma) { static const struct vm_operations_struct vmw_vm_ops = { @@ -41,10 +67,28 @@ int vmw_mmap(struct file *filp, struct vm_area_struct *vma) }; struct drm_file *file_priv = filp->private_data; struct vmw_private *dev_priv = vmw_priv(file_priv->minor->dev); - int ret = ttm_bo_mmap(filp, vma, &dev_priv->bdev); + struct ttm_device *bdev = &dev_priv->bdev; + struct ttm_buffer_object *bo; + int ret; + + if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET_START)) + return -EINVAL; + + bo = vmw_bo_vm_lookup(bdev, vma->vm_pgoff, vma_pages(vma)); + if (unlikely(!bo)) + return -EINVAL;
- if (ret) - return ret; + if (unlikely(!bo->bdev->funcs->verify_access)) { + ret = -EPERM; + goto out_unref; + } + ret = bo->bdev->funcs->verify_access(bo, filp); + if (unlikely(ret != 0)) + goto out_unref; + + ret = ttm_bo_mmap_obj(vma, bo); + if (unlikely(ret != 0)) + goto out_unref;
vma->vm_ops = &vmw_vm_ops;
@@ -52,7 +96,13 @@ int vmw_mmap(struct file *filp, struct vm_area_struct *vma) if (!is_cow_mapping(vma->vm_flags)) vma->vm_flags = (vma->vm_flags & ~VM_MIXEDMAP) | VM_PFNMAP;
+ ttm_bo_put(bo); /* release extra ref taken by ttm_bo_mmap_obj() */ + return 0; + +out_unref: + ttm_bo_put(bo); + return ret; }
/* struct vmw_validation_mem callback */