1 // SPDX-License-Identifier: MIT
19  * The code in this file deals with setting up memory managers for TTM
22  * i915 GEM regions to TTM memory types and resource managers.
26  * intel_region_ttm_device_init - Initialize a TTM device
33 	struct drm_device *drm = &dev_priv->drm;  in intel_region_ttm_device_init()
35 	return ttm_device_init(&dev_priv->bdev, i915_ttm_driver(),  in intel_region_ttm_device_init()
36 			       drm->dev, drm->anon_inode->i_mapping,  in intel_region_ttm_device_init()
37 			       drm->vma_offset_manager, false, false);  in intel_region_ttm_device_init()
41  * intel_region_ttm_device_fini - Finalize a TTM device
46 	ttm_device_fini(&dev_priv->bdev);  in intel_region_ttm_device_fini()
50  * Map the i915 memory regions to TTM memory types. We use the
51  * driver-private types for now, reserving TTM_PL_VRAM for stolen
52  * memory and TTM_PL_TT for GGTT use if decided to implement this.
58 	GEM_BUG_ON(mem->type != INTEL_MEMORY_LOCAL &&  in intel_region_to_ttm_type()
59 		   mem->type != INTEL_MEMORY_MOCK &&  in intel_region_to_ttm_type()
60 		   mem->type != INTEL_MEMORY_SYSTEM);  in intel_region_to_ttm_type()
62 	if (mem->type == INTEL_MEMORY_SYSTEM)  in intel_region_to_ttm_type()
65 	type = mem->instance + TTM_PL_PRIV;  in intel_region_to_ttm_type()
72  * intel_region_ttm_init - Initialize a memory region for TTM.
73  * @mem: The region to initialize.
76  * region, and if it's a LMEM region type, attaches it to the TTM
84 	struct ttm_device *bdev = &mem->i915->bdev;  in intel_region_ttm_init()
89 				      resource_size(&mem->region),  in intel_region_ttm_init()
90 				      mem->min_page_size, PAGE_SIZE);  in intel_region_ttm_init()
94 	mem->region_private = ttm_manager_type(bdev, mem_type);  in intel_region_ttm_init()
100  * intel_region_ttm_fini - Finalize a TTM region.
101  * @mem: The memory region
104  * memory region, and if it was registered with the TTM device,
111 	ret = i915_ttm_buddy_man_fini(&mem->i915->bdev,  in intel_region_ttm_fini()
114 	mem->region_private = NULL;  in intel_region_ttm_fini()
118  * intel_region_ttm_resource_to_st - Convert an opaque TTM resource manager resource
120  * @mem: The memory region.
123  * The gem backends typically use sg-tables for operations on the underlying
125  * nodes they are handed from TTM to sg-tables.
132 	if (mem->is_range_manager) {  in intel_region_ttm_resource_to_st()
136 		return i915_sg_from_mm_node(&range_node->mm_nodes[0],  in intel_region_ttm_resource_to_st()
137 					    mem->region.start);  in intel_region_ttm_resource_to_st()
139 		return i915_sg_from_buddy_resource(res, mem->region.start);  in intel_region_ttm_resource_to_st()
145  * intel_region_ttm_resource_alloc - Allocate memory resources from a region
146  * @mem: The memory region,
151  * memory from standalone TTM range managers, without the TTM eviction
164 	struct ttm_resource_manager *man = mem->region_private;  in intel_region_ttm_resource_alloc()
173 	ret = man->func->alloc(man, &mock_bo, &place, &res);  in intel_region_ttm_resource_alloc()
174 	if (ret == -ENOSPC)  in intel_region_ttm_resource_alloc()
175 		ret = -ENXIO;  in intel_region_ttm_resource_alloc()
182  * intel_region_ttm_resource_free - Free a resource allocated from a resource manager
183  * @mem: The region the resource was allocated from.
189 	struct ttm_resource_manager *man = mem->region_private;  in intel_region_ttm_resource_free()
191 	man->func->free(man, res);  in intel_region_ttm_resource_free()