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


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// 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"

void __iomem *
i915_gem_object_lmem_io_map(struct drm_i915_gem_object *obj,
			    unsigned long n,
			    unsigned long size)
{
	resource_size_t offset;

	GEM_BUG_ON(!i915_gem_object_is_contiguous(obj));

	offset = i915_gem_object_get_dma_address(obj, n);
	offset -= obj->mm.region->region.start;

	return io_mapping_map_wc(&obj->mm.region->iomap, offset, size);
}

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);
}