1 // SPDX-License-Identifier: MIT
7 #include <linux/slab.h> /* fault-inject.h is not standalone! */
9 #include <linux/fault-inject.h>
31 		if (dma_map_sg_attrs(&obj->base.dev->pdev->dev,  in i915_gem_gtt_prepare_pages()
32 				     pages->sgl, pages->nents,  in i915_gem_gtt_prepare_pages()
43 		 * try again - if there are no more pages to remove from  in i915_gem_gtt_prepare_pages()
46 		GEM_BUG_ON(obj->mm.pages == pages);  in i915_gem_gtt_prepare_pages()
47 	} while (i915_gem_shrink(to_i915(obj->base.dev),  in i915_gem_gtt_prepare_pages()
48 				 obj->base.size >> PAGE_SHIFT, NULL,  in i915_gem_gtt_prepare_pages()
52 	return -ENOSPC;  in i915_gem_gtt_prepare_pages()
58 	struct drm_i915_private *dev_priv = to_i915(obj->base.dev);  in i915_gem_gtt_finish_pages()
59 	struct device *kdev = &dev_priv->drm.pdev->dev;  in i915_gem_gtt_finish_pages()
60 	struct i915_ggtt *ggtt = &dev_priv->ggtt;  in i915_gem_gtt_finish_pages()
62 	if (unlikely(ggtt->do_idle_maps)) {  in i915_gem_gtt_finish_pages()
64 		if (intel_gt_retire_requests_timeout(ggtt->vm.gt,  in i915_gem_gtt_finish_pages()
65 						     -MAX_SCHEDULE_TIMEOUT)) {  in i915_gem_gtt_finish_pages()
66 			drm_err(&dev_priv->drm,  in i915_gem_gtt_finish_pages()
67 				"Failed to wait for idle; VT'd may hang.\n");  in i915_gem_gtt_finish_pages()
73 	dma_unmap_sg(kdev, pages->sgl, pages->nents, PCI_DMA_BIDIRECTIONAL);  in i915_gem_gtt_finish_pages()
77  * i915_gem_gtt_reserve - reserve a node in an address_space (GTT)
98  * Returns: 0 on success, -ENOSPC if no suitable hole is found, -EINTR if
111 	GEM_BUG_ON(range_overflows(offset, size, vm->total));  in i915_gem_gtt_reserve()
112 	GEM_BUG_ON(vm == &vm->i915->ggtt.alias->vm);  in i915_gem_gtt_reserve()
115 	node->size = size;  in i915_gem_gtt_reserve()
116 	node->start = offset;  in i915_gem_gtt_reserve()
117 	node->color = color;  in i915_gem_gtt_reserve()
119 	err = drm_mm_reserve_node(&vm->mm, node);  in i915_gem_gtt_reserve()
120 	if (err != -ENOSPC)  in i915_gem_gtt_reserve()
124 		return -ENOSPC;  in i915_gem_gtt_reserve()
128 		err = drm_mm_reserve_node(&vm->mm, node);  in i915_gem_gtt_reserve()
138 	GEM_BUG_ON(round_up(start, align) > round_down(end - len, align));  in random_offset()
140 	range = round_down(end - len, align) - round_up(start, align);  in random_offset()
159  * i915_gem_gtt_insert - insert a node into an address_space (GTT)
165  *             if specified, this must be a power-of-two and at least
189  * Returns: 0 on success, -ENOSPC if no suitable hole is found, -EINTR if
201 	lockdep_assert_held(&vm->mutex);  in i915_gem_gtt_insert()
210 	GEM_BUG_ON(vm == &vm->i915->ggtt.alias->vm);  in i915_gem_gtt_insert()
214 		return -ENOSPC;  in i915_gem_gtt_insert()
216 	if (unlikely(round_up(start, alignment) > round_down(end - size, alignment)))  in i915_gem_gtt_insert()
217 		return -ENOSPC;  in i915_gem_gtt_insert()
235 	err = drm_mm_insert_node_in_range(&vm->mm, node,  in i915_gem_gtt_insert()
238 	if (err != -ENOSPC)  in i915_gem_gtt_insert()
242 		err = drm_mm_insert_node_in_range(&vm->mm, node,  in i915_gem_gtt_insert()
246 		if (err != -ENOSPC)  in i915_gem_gtt_insert()
251 		return -ENOSPC;  in i915_gem_gtt_insert()
257 	 * mmap and GPU (i.e. ggtt/aliasing_ppgtt but not full-ppgtt):  in i915_gem_gtt_insert()
259 	 *    |<-- 256 MiB aperture -->||<-- 1792 MiB unmappable -->|  in i915_gem_gtt_insert()
262 	 * Now imagine that the eviction LRU is ordered top-down (just because  in i915_gem_gtt_insert()
269 	 * On a full-ppgtt system, if we have run out of available space, there  in i915_gem_gtt_insert()
272 	 * range restrictions (e.g. restriction to low 4GiB) and so, for  in i915_gem_gtt_insert()
279 	if (err != -ENOSPC)  in i915_gem_gtt_insert()
283 		return -ENOSPC;  in i915_gem_gtt_insert()
291 	return drm_mm_insert_node_in_range(&vm->mm, node,  in i915_gem_gtt_insert()