| /* 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 { |
| const char *name; |
| unsigned long fdt_node; |
| unsigned long phandle; |
| const struct reserved_mem_ops *ops; |
| phys_addr_t base; |
| phys_addr_t size; |
| void *priv; |
| }; |
| |
| struct reserved_mem_ops { |
| int (*device_init)(struct reserved_mem *rmem, |
| struct device *dev); |
| void (*device_release)(struct reserved_mem *rmem, |
| struct device *dev); |
| }; |
| |
| typedef int (*reservedmem_of_init_fn)(struct reserved_mem *rmem); |
| |
| #define RESERVEDMEM_OF_DECLARE(name, compat, init) \ |
| _OF_DECLARE(reservedmem, name, compat, init, reservedmem_of_init_fn) |
| |
| #ifdef CONFIG_OF_RESERVED_MEM |
| |
| 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); |
| |
| void fdt_init_reserved_mem(void); |
| void fdt_reserved_mem_save_node(unsigned long node, const char *uname, |
| phys_addr_t base, phys_addr_t size); |
| struct reserved_mem *of_reserved_mem_lookup(struct device_node *np); |
| #else |
| 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 void fdt_init_reserved_mem(void) { } |
| static inline void fdt_reserved_mem_save_node(unsigned long node, |
| const char *uname, phys_addr_t base, phys_addr_t size) { } |
| 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) |
| { |
| return of_reserved_mem_device_init_by_idx(dev, dev->of_node, 0); |
| } |
| |
| #endif /* __OF_RESERVED_MEM_H */ |