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

// SPDX-License-Identifier: MIT
/*
 * Copyright © 2019 Intel Corporation
 */

#include "intel_memory_region.h"
#include "gem/i915_gem_region.h"
#include "gem/i915_gem_lmem.h"
#include "i915_drv.h"

const struct drm_i915_gem_object_ops i915_gem_lmem_obj_ops = {
	.name = "i915_gem_object_lmem",
	.flags = I915_GEM_OBJECT_HAS_IOMEM,

	.get_pages = i915_gem_object_get_pages_buddy,
	.put_pages = i915_gem_object_put_pages_buddy,
	.release = i915_gem_object_release_memory_region,
};

bool i915_gem_object_is_lmem(struct drm_i915_gem_object *obj)
{
	struct intel_memory_region *mr = obj->mm.region;

	return mr && (mr->type == INTEL_MEMORY_LOCAL ||
		      mr->type == INTEL_MEMORY_STOLEN_LOCAL);
}

struct drm_i915_gem_object *
i915_gem_object_create_lmem(struct drm_i915_private *i915,
			    resource_size_t size,
			    unsigned int flags)
{
	return i915_gem_object_create_region(i915->mm.regions[INTEL_REGION_LMEM],
					     size, flags);
}

int __i915_gem_lmem_object_init(struct intel_memory_region *mem,
				struct drm_i915_gem_object *obj,
				resource_size_t size,
				unsigned int flags)
{
	static struct lock_class_key lock_class;
	struct drm_i915_private *i915 = mem->i915;

	drm_gem_private_object_init(&i915->drm, &obj->base, size);
	i915_gem_object_init(obj, &i915_gem_lmem_obj_ops, &lock_class, flags);

	obj->read_domains = I915_GEM_DOMAIN_WC | I915_GEM_DOMAIN_GTT;

	i915_gem_object_set_cache_coherency(obj, I915_CACHE_NONE);

	i915_gem_object_init_memory_region(obj, mem);

	return 0;
}