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1// SPDX-License-Identifier: MIT2/*3 * Copyright © 2019-2021 Intel Corporation4 */5 6#include <drm/ttm/ttm_placement.h>7#include <linux/scatterlist.h>8 9#include "gem/i915_gem_region.h"10#include "intel_memory_region.h"11#include "intel_region_ttm.h"12 13#include "mock_region.h"14 15static void mock_region_put_pages(struct drm_i915_gem_object *obj,16 struct sg_table *pages)17{18 i915_refct_sgt_put(obj->mm.rsgt);19 obj->mm.rsgt = NULL;20 intel_region_ttm_resource_free(obj->mm.region, obj->mm.res);21}22 23static int mock_region_get_pages(struct drm_i915_gem_object *obj)24{25 struct sg_table *pages;26 int err;27 28 obj->mm.res = intel_region_ttm_resource_alloc(obj->mm.region,29 obj->bo_offset,30 obj->base.size,31 obj->flags);32 if (IS_ERR(obj->mm.res))33 return PTR_ERR(obj->mm.res);34 35 obj->mm.rsgt = intel_region_ttm_resource_to_rsgt(obj->mm.region,36 obj->mm.res,37 obj->mm.region->min_page_size);38 if (IS_ERR(obj->mm.rsgt)) {39 err = PTR_ERR(obj->mm.rsgt);40 goto err_free_resource;41 }42 43 pages = &obj->mm.rsgt->table;44 __i915_gem_object_set_pages(obj, pages);45 46 return 0;47 48err_free_resource:49 intel_region_ttm_resource_free(obj->mm.region, obj->mm.res);50 return err;51}52 53static const struct drm_i915_gem_object_ops mock_region_obj_ops = {54 .name = "mock-region",55 .get_pages = mock_region_get_pages,56 .put_pages = mock_region_put_pages,57 .release = i915_gem_object_release_memory_region,58};59 60static int mock_object_init(struct intel_memory_region *mem,61 struct drm_i915_gem_object *obj,62 resource_size_t offset,63 resource_size_t size,64 resource_size_t page_size,65 unsigned int flags)66{67 static struct lock_class_key lock_class;68 struct drm_i915_private *i915 = mem->i915;69 70 if (size > resource_size(&mem->region))71 return -E2BIG;72 73 drm_gem_private_object_init(&i915->drm, &obj->base, size);74 i915_gem_object_init(obj, &mock_region_obj_ops, &lock_class, flags);75 76 obj->bo_offset = offset;77 78 obj->read_domains = I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT;79 80 i915_gem_object_set_cache_coherency(obj, I915_CACHE_NONE);81 82 i915_gem_object_init_memory_region(obj, mem);83 84 return 0;85}86 87static int mock_region_fini(struct intel_memory_region *mem)88{89 struct drm_i915_private *i915 = mem->i915;90 int instance = mem->instance;91 int ret;92 93 ret = intel_region_ttm_fini(mem);94 ida_free(&i915->selftest.mock_region_instances, instance);95 96 return ret;97}98 99static const struct intel_memory_region_ops mock_region_ops = {100 .init = intel_region_ttm_init,101 .release = mock_region_fini,102 .init_object = mock_object_init,103};104 105struct intel_memory_region *106mock_region_create(struct drm_i915_private *i915,107 resource_size_t start,108 resource_size_t size,109 resource_size_t min_page_size,110 resource_size_t io_start,111 resource_size_t io_size)112{113 int instance = ida_alloc_max(&i915->selftest.mock_region_instances,114 TTM_NUM_MEM_TYPES - TTM_PL_PRIV - 1,115 GFP_KERNEL);116 117 if (instance < 0)118 return ERR_PTR(instance);119 120 return intel_memory_region_create(i915, start, size, min_page_size,121 io_start, io_size,122 INTEL_MEMORY_MOCK, instance,123 &mock_region_ops);124}125