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// SPDX-License-Identifier: MIT
/*
* Copyright © 2019-2021 Intel Corporation
*/
#include <drm/ttm/ttm_placement.h>
#include <linux/scatterlist.h>
#include "gem/i915_gem_region.h"
#include "intel_memory_region.h"
#include "intel_region_ttm.h"
#include "mock_region.h"
static void mock_region_put_pages(struct drm_i915_gem_object *obj,
struct sg_table *pages)
{
i915_refct_sgt_put(obj->mm.rsgt);
obj->mm.rsgt = NULL;
intel_region_ttm_resource_free(obj->mm.region, obj->mm.res);
}
static int mock_region_get_pages(struct drm_i915_gem_object *obj)
{
struct sg_table *pages;
int err;
obj->mm.res = intel_region_ttm_resource_alloc(obj->mm.region,
obj->bo_offset,
obj->base.size,
obj->flags);
if (IS_ERR(obj->mm.res))
return PTR_ERR(obj->mm.res);
obj->mm.rsgt = intel_region_ttm_resource_to_rsgt(obj->mm.region,
obj->mm.res,
obj->mm.region->min_page_size);
if (IS_ERR(obj->mm.rsgt)) {
err = PTR_ERR(obj->mm.rsgt);
goto err_free_resource;
}
pages = &obj->mm.rsgt->table;
__i915_gem_object_set_pages(obj, pages);
return 0;
err_free_resource:
intel_region_ttm_resource_free(obj->mm.region, obj->mm.res);
return err;
}
static const struct drm_i915_gem_object_ops mock_region_obj_ops = {
.name = "mock-region",
.get_pages = mock_region_get_pages,
.put_pages = mock_region_put_pages,
.release = i915_gem_object_release_memory_region,
};
static int mock_object_init(struct intel_memory_region *mem,
struct drm_i915_gem_object *obj,
resource_size_t offset,
resource_size_t size,
resource_size_t page_size,
unsigned int flags)
{
static struct lock_class_key lock_class;
struct drm_i915_private *i915 = mem->i915;
if (size > resource_size(&mem->region))
return -E2BIG;
drm_gem_private_object_init(&i915->drm, &obj->base, size);
i915_gem_object_init(obj, &mock_region_obj_ops, &lock_class, flags);
obj->bo_offset = offset;
obj->read_domains = I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT;
i915_gem_object_set_cache_coherency(obj, I915_CACHE_NONE);
i915_gem_object_init_memory_region(obj, mem);
return 0;
}
static int mock_region_fini(struct intel_memory_region *mem)
{
struct drm_i915_private *i915 = mem->i915;
int instance = mem->instance;
int ret;
ret = intel_region_ttm_fini(mem);
ida_free(&i915->selftest.mock_region_instances, instance);
return ret;
}
static const struct intel_memory_region_ops mock_region_ops = {
.init = intel_region_ttm_init,
.release = mock_region_fini,
.init_object = mock_object_init,
};
struct intel_memory_region *
mock_region_create(struct drm_i915_private *i915,
resource_size_t start,
resource_size_t size,
resource_size_t min_page_size,
resource_size_t io_start,
resource_size_t io_size)
{
int instance = ida_alloc_max(&i915->selftest.mock_region_instances,
TTM_NUM_MEM_TYPES - TTM_PL_PRIV - 1,
GFP_KERNEL);
if (instance < 0)
return ERR_PTR(instance);
return intel_memory_region_create(i915, start, size, min_page_size,
io_start, io_size,
INTEL_MEMORY_MOCK, instance,
&mock_region_ops);
}
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