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
11void 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	if (obj->base.size <= mem->min_page_size)
17		obj->flags |= I915_BO_ALLOC_CONTIGUOUS;
18
19	mutex_lock(&mem->objects.lock);
20
21	if (obj->flags & I915_BO_ALLOC_VOLATILE)
22		list_add(&obj->mm.region_link, &mem->objects.purgeable);
23	else
24		list_add(&obj->mm.region_link, &mem->objects.list);
25
26	mutex_unlock(&mem->objects.lock);
27}
28
29void i915_gem_object_release_memory_region(struct drm_i915_gem_object *obj)
30{
31	struct intel_memory_region *mem = obj->mm.region;
32
33	mutex_lock(&mem->objects.lock);
34	list_del(&obj->mm.region_link);
35	mutex_unlock(&mem->objects.lock);
36
37	intel_memory_region_put(mem);
38}
39
40struct drm_i915_gem_object *
41i915_gem_object_create_region(struct intel_memory_region *mem,
42			      resource_size_t size,
43			      unsigned int flags)
44{
45	struct drm_i915_gem_object *obj;
46	int err;
47
48	/*
49	 * NB: Our use of resource_size_t for the size stems from using struct
50	 * resource for the mem->region. We might need to revisit this in the
51	 * future.
52	 */
53
54	GEM_BUG_ON(flags & ~I915_BO_ALLOC_FLAGS);
55
56	if (!mem)
57		return ERR_PTR(-ENODEV);
58
59	size = round_up(size, mem->min_page_size);
60
61	GEM_BUG_ON(!size);
62	GEM_BUG_ON(!IS_ALIGNED(size, I915_GTT_MIN_ALIGNMENT));
63
64	if (i915_gem_object_size_2big(size))
65		return ERR_PTR(-E2BIG);
66
67	obj = i915_gem_object_alloc();
68	if (!obj)
69		return ERR_PTR(-ENOMEM);
70
71	err = mem->ops->init_object(mem, obj, size, flags);
72	if (err)
73		goto err_object_free;
74
75	trace_i915_gem_object_create(obj);
76	return obj;
77
78err_object_free:
79	i915_gem_object_free(obj);
80	return ERR_PTR(err);
81}