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86 lines
2.4 KiB
86 lines
2.4 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef __OF_RESERVED_MEM_H |
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#define __OF_RESERVED_MEM_H |
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#include <linux/device.h> |
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#include <linux/of.h> |
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struct of_phandle_args; |
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struct reserved_mem_ops; |
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struct reserved_mem { |
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const char *name; |
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unsigned long fdt_node; |
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unsigned long phandle; |
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const struct reserved_mem_ops *ops; |
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phys_addr_t base; |
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phys_addr_t size; |
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void *priv; |
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}; |
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struct reserved_mem_ops { |
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int (*device_init)(struct reserved_mem *rmem, |
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struct device *dev); |
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void (*device_release)(struct reserved_mem *rmem, |
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struct device *dev); |
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}; |
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typedef int (*reservedmem_of_init_fn)(struct reserved_mem *rmem); |
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#define RESERVEDMEM_OF_DECLARE(name, compat, init) \ |
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_OF_DECLARE(reservedmem, name, compat, init, reservedmem_of_init_fn) |
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#ifdef CONFIG_OF_RESERVED_MEM |
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int of_reserved_mem_device_init_by_idx(struct device *dev, |
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struct device_node *np, int idx); |
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int of_reserved_mem_device_init_by_name(struct device *dev, |
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struct device_node *np, |
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const char *name); |
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void of_reserved_mem_device_release(struct device *dev); |
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void fdt_init_reserved_mem(void); |
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void fdt_reserved_mem_save_node(unsigned long node, const char *uname, |
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phys_addr_t base, phys_addr_t size); |
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struct reserved_mem *of_reserved_mem_lookup(struct device_node *np); |
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#else |
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static inline int of_reserved_mem_device_init_by_idx(struct device *dev, |
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struct device_node *np, int idx) |
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{ |
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return -ENOSYS; |
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} |
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static inline int of_reserved_mem_device_init_by_name(struct device *dev, |
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struct device_node *np, |
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const char *name) |
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{ |
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return -ENOSYS; |
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} |
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static inline void of_reserved_mem_device_release(struct device *pdev) { } |
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static inline void fdt_init_reserved_mem(void) { } |
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static inline void fdt_reserved_mem_save_node(unsigned long node, |
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const char *uname, phys_addr_t base, phys_addr_t size) { } |
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static inline struct reserved_mem *of_reserved_mem_lookup(struct device_node *np) |
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{ |
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return NULL; |
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} |
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#endif |
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/** |
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* of_reserved_mem_device_init() - assign reserved memory region to given device |
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* @dev: Pointer to the device to configure |
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* |
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* This function assigns respective DMA-mapping operations based on the first |
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* reserved memory region specified by 'memory-region' property in device tree |
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* node of the given device. |
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* |
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* Returns error code or zero on success. |
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*/ |
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static inline int of_reserved_mem_device_init(struct device *dev) |
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{ |
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return of_reserved_mem_device_init_by_idx(dev, dev->of_node, 0); |
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} |
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#endif /* __OF_RESERVED_MEM_H */
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