1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright © 2019-2021 Intel Corporation 4 */ 5 6 #include <linux/scatterlist.h> 7 8 #include <drm/ttm/ttm_placement.h> 9 10 #include "gem/i915_gem_region.h" 11 #include "intel_memory_region.h" 12 #include "intel_region_ttm.h" 13 14 #include "mock_region.h" 15 16 static void mock_region_put_pages(struct drm_i915_gem_object *obj, 17 struct sg_table *pages) 18 { 19 intel_region_ttm_node_free(obj->mm.region, obj->mm.st_mm_node); 20 sg_free_table(pages); 21 kfree(pages); 22 } 23 24 static int mock_region_get_pages(struct drm_i915_gem_object *obj) 25 { 26 unsigned int flags; 27 struct sg_table *pages; 28 29 flags = I915_ALLOC_MIN_PAGE_SIZE; 30 if (obj->flags & I915_BO_ALLOC_CONTIGUOUS) 31 flags |= I915_ALLOC_CONTIGUOUS; 32 33 obj->mm.st_mm_node = intel_region_ttm_node_alloc(obj->mm.region, 34 obj->base.size, 35 flags); 36 if (IS_ERR(obj->mm.st_mm_node)) 37 return PTR_ERR(obj->mm.st_mm_node); 38 39 pages = intel_region_ttm_node_to_st(obj->mm.region, obj->mm.st_mm_node); 40 if (IS_ERR(pages)) { 41 intel_region_ttm_node_free(obj->mm.region, obj->mm.st_mm_node); 42 return PTR_ERR(pages); 43 } 44 45 __i915_gem_object_set_pages(obj, pages, i915_sg_dma_sizes(pages->sgl)); 46 47 return 0; 48 } 49 50 static const struct drm_i915_gem_object_ops mock_region_obj_ops = { 51 .name = "mock-region", 52 .get_pages = mock_region_get_pages, 53 .put_pages = mock_region_put_pages, 54 .release = i915_gem_object_release_memory_region, 55 }; 56 57 static int mock_object_init(struct intel_memory_region *mem, 58 struct drm_i915_gem_object *obj, 59 resource_size_t size, 60 unsigned int flags) 61 { 62 static struct lock_class_key lock_class; 63 struct drm_i915_private *i915 = mem->i915; 64 65 if (size > resource_size(&mem->region)) 66 return -E2BIG; 67 68 drm_gem_private_object_init(&i915->drm, &obj->base, size); 69 i915_gem_object_init(obj, &mock_region_obj_ops, &lock_class, flags); 70 71 obj->read_domains = I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT; 72 73 i915_gem_object_set_cache_coherency(obj, I915_CACHE_NONE); 74 75 i915_gem_object_init_memory_region(obj, mem); 76 77 return 0; 78 } 79 80 static void mock_region_fini(struct intel_memory_region *mem) 81 { 82 struct drm_i915_private *i915 = mem->i915; 83 int instance = mem->instance; 84 85 intel_region_ttm_fini(mem); 86 ida_free(&i915->selftest.mock_region_instances, instance); 87 } 88 89 static const struct intel_memory_region_ops mock_region_ops = { 90 .init = intel_region_ttm_init, 91 .release = mock_region_fini, 92 .init_object = mock_object_init, 93 }; 94 95 struct intel_memory_region * 96 mock_region_create(struct drm_i915_private *i915, 97 resource_size_t start, 98 resource_size_t size, 99 resource_size_t min_page_size, 100 resource_size_t io_start) 101 { 102 int instance = ida_alloc_max(&i915->selftest.mock_region_instances, 103 TTM_NUM_MEM_TYPES - TTM_PL_PRIV - 1, 104 GFP_KERNEL); 105 106 if (instance < 0) 107 return ERR_PTR(instance); 108 109 return intel_memory_region_create(i915, start, size, min_page_size, 110 io_start, INTEL_MEMORY_MOCK, instance, 111 &mock_region_ops); 112 } 113