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drm/ttm: factor out ttm_bo_mmap_vma_setup 

Factor out ttm vma setup to a new function.
Reduces code duplication a bit.

v2: don't change vm_flags (moved to separate patch).
v4: make ttm_bo_mmap_vma_setup static.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20191016115203.20095-7-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann 2019-10-16 13:51:58 +02:00
parent eee9a2e0ad
commit 24e25ea6d7
1 changed files with 24 additions and 22 deletions
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46
drivers/gpu/drm/ttm/ttm_bo_vm.c
View File

@ -426,6 +426,28 @@ static struct ttm_buffer_object *ttm_bo_vm_lookup(struct ttm_bo_device *bdev,
return bo;
}
static void ttm_bo_mmap_vma_setup(struct ttm_buffer_object *bo, struct vm_area_struct *vma)
{
vma->vm_ops = &ttm_bo_vm_ops;
/*
* Note: We're transferring the bo reference to
* vma->vm_private_data here.
*/
vma->vm_private_data = bo;
/*
* We'd like to use VM_PFNMAP on shared mappings, where
* (vma->vm_flags & VM_SHARED) != 0, for performance reasons,
* but for some reason VM_PFNMAP + x86 PAT + write-combine is very
* bad for performance. Until that has been sorted out, use
* VM_MIXEDMAP on all mappings. See freedesktop.org bug #75719
*/
vma->vm_flags |= VM_MIXEDMAP;
vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
}
int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma,
struct ttm_bo_device *bdev)
{
@ -449,24 +471,7 @@ int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma,
if (unlikely(ret != 0))
goto out_unref;
vma->vm_ops = &ttm_bo_vm_ops;
/*
* Note: We're transferring the bo reference to
* vma->vm_private_data here.
*/
vma->vm_private_data = bo;
/*
* We'd like to use VM_PFNMAP on shared mappings, where
* (vma->vm_flags & VM_SHARED) != 0, for performance reasons,
* but for some reason VM_PFNMAP + x86 PAT + write-combine is very
* bad for performance. Until that has been sorted out, use
* VM_MIXEDMAP on all mappings. See freedesktop.org bug #75719
*/
vma->vm_flags |= VM_MIXEDMAP;
vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
ttm_bo_mmap_vma_setup(bo, vma);
return 0;
out_unref:
ttm_bo_put(bo);
@ -481,10 +486,7 @@ int ttm_fbdev_mmap(struct vm_area_struct *vma, struct ttm_buffer_object *bo)
ttm_bo_get(bo);
vma->vm_ops = &ttm_bo_vm_ops;
vma->vm_private_data = bo;
vma->vm_flags |= VM_MIXEDMAP;
vma->vm_flags |= VM_IO | VM_DONTEXPAND;
ttm_bo_mmap_vma_setup(bo, vma);
return 0;
}
EXPORT_SYMBOL(ttm_fbdev_mmap);