LCOV - code coverage report
Current view: top level - include/linux - of_reserved_mem.h (source / functions) Hit Total Coverage
Test: combined.info Lines: 0 3 0.0 %
Date: 2022-04-01 14:17:54 Functions: 0 0 -
Branches: 0 0 -

           Branch data     Line data    Source code
       1                 :            : /* SPDX-License-Identifier: GPL-2.0 */
       2                 :            : #ifndef __OF_RESERVED_MEM_H
       3                 :            : #define __OF_RESERVED_MEM_H
       4                 :            : 
       5                 :            : #include <linux/device.h>
       6                 :            : 
       7                 :            : struct of_phandle_args;
       8                 :            : struct reserved_mem_ops;
       9                 :            : 
      10                 :            : struct reserved_mem {
      11                 :            :         const char                      *name;
      12                 :            :         unsigned long                   fdt_node;
      13                 :            :         unsigned long                   phandle;
      14                 :            :         const struct reserved_mem_ops   *ops;
      15                 :            :         phys_addr_t                     base;
      16                 :            :         phys_addr_t                     size;
      17                 :            :         void                            *priv;
      18                 :            : };
      19                 :            : 
      20                 :            : struct reserved_mem_ops {
      21                 :            :         int     (*device_init)(struct reserved_mem *rmem,
      22                 :            :                                struct device *dev);
      23                 :            :         void    (*device_release)(struct reserved_mem *rmem,
      24                 :            :                                   struct device *dev);
      25                 :            : };
      26                 :            : 
      27                 :            : typedef int (*reservedmem_of_init_fn)(struct reserved_mem *rmem);
      28                 :            : 
      29                 :            : #define RESERVEDMEM_OF_DECLARE(name, compat, init)                      \
      30                 :            :         _OF_DECLARE(reservedmem, name, compat, init, reservedmem_of_init_fn)
      31                 :            : 
      32                 :            : #ifdef CONFIG_OF_RESERVED_MEM
      33                 :            : 
      34                 :            : int of_reserved_mem_device_init_by_idx(struct device *dev,
      35                 :            :                                        struct device_node *np, int idx);
      36                 :            : void of_reserved_mem_device_release(struct device *dev);
      37                 :            : 
      38                 :            : void fdt_init_reserved_mem(void);
      39                 :            : void fdt_reserved_mem_save_node(unsigned long node, const char *uname,
      40                 :            :                                phys_addr_t base, phys_addr_t size);
      41                 :            : struct reserved_mem *of_reserved_mem_lookup(struct device_node *np);
      42                 :            : #else
      43                 :          0 : static inline int of_reserved_mem_device_init_by_idx(struct device *dev,
      44                 :            :                                         struct device_node *np, int idx)
      45                 :            : {
      46                 :          0 :         return -ENOSYS;
      47                 :            : }
      48                 :          0 : static inline void of_reserved_mem_device_release(struct device *pdev) { }
      49                 :            : 
      50                 :            : static inline void fdt_init_reserved_mem(void) { }
      51                 :            : static inline void fdt_reserved_mem_save_node(unsigned long node,
      52                 :            :                 const char *uname, phys_addr_t base, phys_addr_t size) { }
      53                 :            : static inline struct reserved_mem *of_reserved_mem_lookup(struct device_node *np)
      54                 :            : {
      55                 :            :         return NULL;
      56                 :            : }
      57                 :            : #endif
      58                 :            : 
      59                 :            : /**
      60                 :            :  * of_reserved_mem_device_init() - assign reserved memory region to given device
      61                 :            :  * @dev:        Pointer to the device to configure
      62                 :            :  *
      63                 :            :  * This function assigns respective DMA-mapping operations based on the first
      64                 :            :  * reserved memory region specified by 'memory-region' property in device tree
      65                 :            :  * node of the given device.
      66                 :            :  *
      67                 :            :  * Returns error code or zero on success.
      68                 :            :  */
      69                 :            : static inline int of_reserved_mem_device_init(struct device *dev)
      70                 :            : {
      71                 :            :         return of_reserved_mem_device_init_by_idx(dev, dev->of_node, 0);
      72                 :            : }
      73                 :            : 
      74                 :            : #endif /* __OF_RESERVED_MEM_H */

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