linux/include/linux/of_reserved_mem.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __OF_RESERVED_MEM_H
#define __OF_RESERVED_MEM_H

#include <linux/device.h>
#include <linux/of.h>

struct of_phandle_args;
struct reserved_mem_ops;

struct reserved_mem { … };

struct reserved_mem_ops { … };

reservedmem_of_init_fn;

#ifdef CONFIG_OF_RESERVED_MEM

#define RESERVEDMEM_OF_DECLARE(name, compat, init) …

int of_reserved_mem_device_init_by_idx(struct device *dev,
				       struct device_node *np, int idx);
int of_reserved_mem_device_init_by_name(struct device *dev,
					struct device_node *np,
					const char *name);
void of_reserved_mem_device_release(struct device *dev);

struct reserved_mem *of_reserved_mem_lookup(struct device_node *np);
#else

#define RESERVEDMEM_OF_DECLARE …

static inline int of_reserved_mem_device_init_by_idx(struct device *dev,
					struct device_node *np, int idx)
{
	return -ENOSYS;
}

static inline int of_reserved_mem_device_init_by_name(struct device *dev,
						      struct device_node *np,
						      const char *name)
{
	return -ENOSYS;
}

static inline void of_reserved_mem_device_release(struct device *pdev) { }

static inline struct reserved_mem *of_reserved_mem_lookup(struct device_node *np)
{
	return NULL;
}
#endif

/**
 * of_reserved_mem_device_init() - assign reserved memory region to given device
 * @dev:	Pointer to the device to configure
 *
 * This function assigns respective DMA-mapping operations based on the first
 * reserved memory region specified by 'memory-region' property in device tree
 * node of the given device.
 *
 * Returns error code or zero on success.
 */
static inline int of_reserved_mem_device_init(struct device *dev)
{ … }

#endif /* __OF_RESERVED_MEM_H */