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      1 /*	$NetBSD: i915_gem_lmem.c,v 1.2 2021/12/18 23:45:30 riastradh Exp $	*/
      2 
      3 // SPDX-License-Identifier: MIT
      4 /*
      5  * Copyright  2019 Intel Corporation
      6  */
      7 
      8 #include <sys/cdefs.h>
      9 __KERNEL_RCSID(0, "$NetBSD: i915_gem_lmem.c,v 1.2 2021/12/18 23:45:30 riastradh Exp $");
     10 
     11 #include "intel_memory_region.h"
     12 #include "gem/i915_gem_region.h"
     13 #include "gem/i915_gem_lmem.h"
     14 #include "i915_drv.h"
     15 
     16 const struct drm_i915_gem_object_ops i915_gem_lmem_obj_ops = {
     17 	.flags = I915_GEM_OBJECT_HAS_IOMEM,
     18 
     19 	.get_pages = i915_gem_object_get_pages_buddy,
     20 	.put_pages = i915_gem_object_put_pages_buddy,
     21 	.release = i915_gem_object_release_memory_region,
     22 };
     23 
     24 bool i915_gem_object_is_lmem(struct drm_i915_gem_object *obj)
     25 {
     26 	return obj->ops == &i915_gem_lmem_obj_ops;
     27 }
     28 
     29 struct drm_i915_gem_object *
     30 i915_gem_object_create_lmem(struct drm_i915_private *i915,
     31 			    resource_size_t size,
     32 			    unsigned int flags)
     33 {
     34 	return i915_gem_object_create_region(i915->mm.regions[INTEL_REGION_LMEM],
     35 					     size, flags);
     36 }
     37 
     38 struct drm_i915_gem_object *
     39 __i915_gem_lmem_object_create(struct intel_memory_region *mem,
     40 			      resource_size_t size,
     41 			      unsigned int flags)
     42 {
     43 	static struct lock_class_key lock_class;
     44 	struct drm_i915_private *i915 = mem->i915;
     45 	struct drm_i915_gem_object *obj;
     46 
     47 	obj = i915_gem_object_alloc();
     48 	if (!obj)
     49 		return ERR_PTR(-ENOMEM);
     50 
     51 	drm_gem_private_object_init(&i915->drm, &obj->base, size);
     52 	i915_gem_object_init(obj, &i915_gem_lmem_obj_ops, &lock_class);
     53 
     54 	obj->read_domains = I915_GEM_DOMAIN_WC | I915_GEM_DOMAIN_GTT;
     55 
     56 	i915_gem_object_set_cache_coherency(obj, I915_CACHE_NONE);
     57 
     58 	i915_gem_object_init_memory_region(obj, mem, flags);
     59 
     60 	return obj;
     61 }
     62