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      1 /*	$NetBSD: mock_region.c,v 1.2 2021/12/18 23:45:31 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: mock_region.c,v 1.2 2021/12/18 23:45:31 riastradh Exp $");
     10 
     11 #include "gem/i915_gem_region.h"
     12 #include "intel_memory_region.h"
     13 
     14 #include "mock_region.h"
     15 
     16 static const struct drm_i915_gem_object_ops mock_region_obj_ops = {
     17 	.get_pages = i915_gem_object_get_pages_buddy,
     18 	.put_pages = i915_gem_object_put_pages_buddy,
     19 	.release = i915_gem_object_release_memory_region,
     20 };
     21 
     22 static struct drm_i915_gem_object *
     23 mock_object_create(struct intel_memory_region *mem,
     24 		   resource_size_t size,
     25 		   unsigned int flags)
     26 {
     27 	static struct lock_class_key lock_class;
     28 	struct drm_i915_private *i915 = mem->i915;
     29 	struct drm_i915_gem_object *obj;
     30 
     31 	if (size > BIT(mem->mm.max_order) * mem->mm.chunk_size)
     32 		return ERR_PTR(-E2BIG);
     33 
     34 	obj = i915_gem_object_alloc();
     35 	if (!obj)
     36 		return ERR_PTR(-ENOMEM);
     37 
     38 	drm_gem_private_object_init(&i915->drm, &obj->base, size);
     39 	i915_gem_object_init(obj, &mock_region_obj_ops, &lock_class);
     40 
     41 	obj->read_domains = I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT;
     42 
     43 	i915_gem_object_set_cache_coherency(obj, I915_CACHE_NONE);
     44 
     45 	i915_gem_object_init_memory_region(obj, mem, flags);
     46 
     47 	return obj;
     48 }
     49 
     50 static const struct intel_memory_region_ops mock_region_ops = {
     51 	.init = intel_memory_region_init_buddy,
     52 	.release = intel_memory_region_release_buddy,
     53 	.create_object = mock_object_create,
     54 };
     55 
     56 struct intel_memory_region *
     57 mock_region_create(struct drm_i915_private *i915,
     58 		   resource_size_t start,
     59 		   resource_size_t size,
     60 		   resource_size_t min_page_size,
     61 		   resource_size_t io_start)
     62 {
     63 	return intel_memory_region_create(i915, start, size, min_page_size,
     64 					  io_start, &mock_region_ops);
     65 }
     66