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drm/ttm: Correctly set page mapping and -index members

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Needed for some vm operations; most notably unmap_mapping_range() with
even_cows = 0.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
This commit is contained in:
Thomas Hellstrom
2014-01-03 11:47:23 +01:00
parent 667a50db04
commit 58aa6622d3
3 changed files with 37 additions and 4 deletions
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5
drivers/gpu/drm/ttm/ttm_bo_vm.c
View File

@@ -226,6 +226,9 @@ static int ttm_bo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
} else if (unlikely(!page)) {
break;
}
page->mapping = vma->vm_file->f_mapping;
page->index = drm_vma_node_start(&bo->vma_node) +
page_offset;
pfn = page_to_pfn(page);
}
@@ -263,6 +266,8 @@ static void ttm_bo_vm_open(struct vm_area_struct *vma)
struct ttm_buffer_object *bo =
(struct ttm_buffer_object *)vma->vm_private_data;
WARN_ON(bo->bdev->dev_mapping != vma->vm_file->f_mapping);
(void)ttm_bo_reference(bo);
}

27
drivers/gpu/drm/ttm/ttm_tt.c
View File

@@ -170,9 +170,8 @@ void ttm_tt_destroy(struct ttm_tt *ttm)
ttm_tt_unbind(ttm);
}
if (ttm->state == tt_unbound) {
ttm->bdev->driver->ttm_tt_unpopulate(ttm);
}
if (ttm->state == tt_unbound)
ttm_tt_unpopulate(ttm);
if (!(ttm->page_flags & TTM_PAGE_FLAG_PERSISTENT_SWAP) &&
ttm->swap_storage)
@@ -362,7 +361,7 @@ int ttm_tt_swapout(struct ttm_tt *ttm, struct file *persistent_swap_storage)
page_cache_release(to_page);
}
ttm->bdev->driver->ttm_tt_unpopulate(ttm);
ttm_tt_unpopulate(ttm);
ttm->swap_storage = swap_storage;
ttm->page_flags |= TTM_PAGE_FLAG_SWAPPED;
if (persistent_swap_storage)
@@ -375,3 +374,23 @@ out_err:
return ret;
}
static void ttm_tt_clear_mapping(struct ttm_tt *ttm)
{
pgoff_t i;
struct page **page = ttm->pages;
for (i = 0; i < ttm->num_pages; ++i) {
(*page)->mapping = NULL;
(*page++)->index = 0;
}
}
void ttm_tt_unpopulate(struct ttm_tt *ttm)
{
if (ttm->state == tt_unpopulated)
return;
ttm_tt_clear_mapping(ttm);
ttm->bdev->driver->ttm_tt_unpopulate(ttm);
}