1 // SPDX-License-Identifier: MIT
2 /*
3 * Copyright © 2019 Intel Corporation
4 */
5
6 #include "intel_memory_region.h"
7 #include "i915_gem_region.h"
8 #include "i915_drv.h"
9 #include "i915_trace.h"
10
i915_gem_object_init_memory_region(struct drm_i915_gem_object * obj,struct intel_memory_region * mem)11 void i915_gem_object_init_memory_region(struct drm_i915_gem_object *obj,
12 struct intel_memory_region *mem)
13 {
14 obj->mm.region = intel_memory_region_get(mem);
15
16 mutex_lock(&mem->objects.lock);
17 list_add(&obj->mm.region_link, &mem->objects.list);
18 mutex_unlock(&mem->objects.lock);
19 }
20
i915_gem_object_release_memory_region(struct drm_i915_gem_object * obj)21 void i915_gem_object_release_memory_region(struct drm_i915_gem_object *obj)
22 {
23 struct intel_memory_region *mem = obj->mm.region;
24
25 mutex_lock(&mem->objects.lock);
26 list_del(&obj->mm.region_link);
27 mutex_unlock(&mem->objects.lock);
28
29 intel_memory_region_put(mem);
30 }
31
32 struct drm_i915_gem_object *
i915_gem_object_create_region(struct intel_memory_region * mem,resource_size_t size,resource_size_t page_size,unsigned int flags)33 i915_gem_object_create_region(struct intel_memory_region *mem,
34 resource_size_t size,
35 resource_size_t page_size,
36 unsigned int flags)
37 {
38 struct drm_i915_gem_object *obj;
39 resource_size_t default_page_size;
40 int err;
41
42 /*
43 * NB: Our use of resource_size_t for the size stems from using struct
44 * resource for the mem->region. We might need to revisit this in the
45 * future.
46 */
47
48 GEM_BUG_ON(flags & ~I915_BO_ALLOC_FLAGS);
49
50 if (!mem)
51 return ERR_PTR(-ENODEV);
52
53 default_page_size = mem->min_page_size;
54 if (page_size)
55 default_page_size = page_size;
56
57 GEM_BUG_ON(!is_power_of_2_u64(default_page_size));
58 GEM_BUG_ON(default_page_size < PAGE_SIZE);
59
60 size = round_up(size, default_page_size);
61
62 GEM_BUG_ON(!size);
63 GEM_BUG_ON(!IS_ALIGNED(size, I915_GTT_MIN_ALIGNMENT));
64
65 if (i915_gem_object_size_2big(size))
66 return ERR_PTR(-E2BIG);
67
68 obj = i915_gem_object_alloc();
69 if (!obj)
70 return ERR_PTR(-ENOMEM);
71
72 err = mem->ops->init_object(mem, obj, size, page_size, flags);
73 if (err)
74 goto err_object_free;
75
76 trace_i915_gem_object_create(obj);
77 return obj;
78
79 err_object_free:
80 i915_gem_object_free(obj);
81 return ERR_PTR(err);
82 }
83
