diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 3b6eb651d88a..c6f80bc3b7bc 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -2342,7 +2342,8 @@ static struct sg_table * i915_gem_object_get_pages_gtt(struct drm_i915_gem_object *obj) { struct drm_i915_private *dev_priv = to_i915(obj->base.dev); - int page_count, i; + const unsigned long page_count = obj->base.size / PAGE_SIZE; + unsigned long i; struct address_space *mapping; struct sg_table *st; struct scatterlist *sg; @@ -2368,7 +2369,7 @@ i915_gem_object_get_pages_gtt(struct drm_i915_gem_object *obj) if (st == NULL) return ERR_PTR(-ENOMEM); - page_count = obj->base.size / PAGE_SIZE; +rebuild_st: if (sg_alloc_table(st, page_count, GFP_KERNEL)) { kfree(st); return ERR_PTR(-ENOMEM); @@ -2427,8 +2428,25 @@ i915_gem_object_get_pages_gtt(struct drm_i915_gem_object *obj) i915_sg_trim(st); ret = i915_gem_gtt_prepare_pages(obj, st); - if (ret) - goto err_pages; + if (ret) { + /* DMA remapping failed? One possible cause is that + * it could not reserve enough large entries, asking + * for PAGE_SIZE chunks instead may be helpful. + */ + if (max_segment > PAGE_SIZE) { + for_each_sgt_page(page, sgt_iter, st) + put_page(page); + sg_free_table(st); + + max_segment = PAGE_SIZE; + goto rebuild_st; + } else { + dev_warn(&dev_priv->drm.pdev->dev, + "Failed to DMA remap %lu pages\n", + page_count); + goto err_pages; + } + } if (i915_gem_object_needs_bit17_swizzle(obj)) i915_gem_object_do_bit_17_swizzle(obj, st); |