diff options
Diffstat (limited to 'shared-core/radeon_ms_bus.c')
| -rw-r--r-- | shared-core/radeon_ms_bus.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/shared-core/radeon_ms_bus.c b/shared-core/radeon_ms_bus.c index d50c9fb8..ed8fb211 100644 --- a/shared-core/radeon_ms_bus.c +++ b/shared-core/radeon_ms_bus.c @@ -46,6 +46,7 @@ struct radeon_pcie_gart { struct radeon_pcie *pcie; unsigned long page_first; struct page **pages; + struct page *dummy_read_page; unsigned long num_pages; int populated; int bound; @@ -57,7 +58,8 @@ static void pcie_ttm_clear(struct drm_ttm_backend *backend); static void pcie_ttm_destroy(struct drm_ttm_backend *backend); static int pcie_ttm_needs_ub_cache_adjust(struct drm_ttm_backend *backend); static int pcie_ttm_populate(struct drm_ttm_backend *backend, - unsigned long num_pages, struct page **pages); + unsigned long num_pages, struct page **pages, + struct page *dummy_read_page); static int pcie_ttm_unbind(struct drm_ttm_backend *backend); static struct drm_ttm_backend_func radeon_pcie_gart_ttm_backend = @@ -130,6 +132,10 @@ static int pcie_ttm_bind(struct drm_ttm_backend *backend, for (i = 0, page = page_first; i < pcie_gart->num_pages; i++, page++) { struct page *cur_page = pcie_gart->pages[i]; + + if (!page) { + cur_page = pcie_gart->dummy_read_page; + } /* write value */ page_base = page_to_phys(cur_page); pcie_gart_set_page_base(pcie_gart->pcie, page, page_base); @@ -173,7 +179,8 @@ static int pcie_ttm_needs_ub_cache_adjust(struct drm_ttm_backend *backend) } static int pcie_ttm_populate(struct drm_ttm_backend *backend, - unsigned long num_pages, struct page **pages) + unsigned long num_pages, struct page **pages, + struct page *dummy_read_page) { struct radeon_pcie_gart *pcie_gart; |