drivers/gpu/drm/i915/gem/i915_gem_lmem.c

   1 // SPDX-License-Identifier: MIT
   2 /*
   3  * Copyright © 2019 Intel Corporation
   4  */
   5
   6 #include "intel_memory_region.h"
   7 #include "gem/i915_gem_region.h"
   8 #include "gem/i915_gem_lmem.h"
   9 #include "i915_drv.h"
  10
  11 const struct drm_i915_gem_object_ops i915_gem_lmem_obj_ops = {
  12         .flags = I915_GEM_OBJECT_HAS_IOMEM,
  13
  14         .get_pages = i915_gem_object_get_pages_buddy,
  15         .put_pages = i915_gem_object_put_pages_buddy,
  16         .release = i915_gem_object_release_memory_region,
  17 };
  18
  19 bool i915_gem_object_is_lmem(struct drm_i915_gem_object *obj)
  20 {
  21         return obj->ops == &i915_gem_lmem_obj_ops;
  22 }
  23
  24 struct drm_i915_gem_object *
  25 i915_gem_object_create_lmem(struct drm_i915_private *i915,
  26                             resource_size_t size,
  27                             unsigned int flags)
  28 {
  29         return i915_gem_object_create_region(i915->mm.regions[INTEL_REGION_LMEM],
  30                                              size, flags);
  31 }
  32
  33 struct drm_i915_gem_object *
  34 __i915_gem_lmem_object_create(struct intel_memory_region *mem,
  35                               resource_size_t size,
  36                               unsigned int flags)
  37 {
  38         static struct lock_class_key lock_class;
  39         struct drm_i915_private *i915 = mem->i915;
  40         struct drm_i915_gem_object *obj;
  41
  42         obj = i915_gem_object_alloc();
  43         if (!obj)
  44                 return ERR_PTR(-ENOMEM);
  45
  46         drm_gem_private_object_init(&i915->drm, &obj->base, size);
  47         i915_gem_object_init(obj, &i915_gem_lmem_obj_ops, &lock_class);
  48
  49         obj->read_domains = I915_GEM_DOMAIN_WC | I915_GEM_DOMAIN_GTT;
  50
  51         i915_gem_object_set_cache_coherency(obj, I915_CACHE_NONE);
  52
  53         i915_gem_object_init_memory_region(obj, mem, flags);
  54
  55         return obj;
  56 }