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Viewing File: /usr/src/kernels/5.14.0-570.32.1.el9_6.x86_64/include/linux/of_address.h
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __OF_ADDRESS_H
#define __OF_ADDRESS_H
#include <linux/ioport.h>
#include <linux/errno.h>
#include <linux/of.h>
#include <linux/io.h>
struct of_bus;
struct of_pci_range_parser {
struct device_node *node;
struct of_bus *bus;
const __be32 *range;
const __be32 *end;
int na;
int ns;
int pna;
bool dma;
};
#define of_range_parser of_pci_range_parser
struct of_pci_range {
union {
u64 pci_addr;
u64 bus_addr;
};
u64 cpu_addr;
u64 size;
u32 flags;
};
#define of_range of_pci_range
#define for_each_of_pci_range(parser, range) \
for (; of_pci_range_parser_one(parser, range);)
#define for_each_of_range for_each_of_pci_range
/*
* of_range_count - Get the number of "ranges" or "dma-ranges" entries
* @parser: Parser state initialized by of_range_parser_init()
*
* Returns the number of entries or 0 if none.
*
* Note that calling this within or after the for_each_of_range() iterator will
* be inaccurate giving the number of entries remaining.
*/
static inline int of_range_count(const struct of_range_parser *parser)
{
if (!parser || !parser->node || !parser->range || parser->range == parser->end)
return 0;
return (parser->end - parser->range) / (parser->na + parser->pna + parser->ns);
}
/* Translate a DMA address from device space to CPU space */
extern u64 of_translate_dma_address(struct device_node *dev,
const __be32 *in_addr);
extern const __be32 *of_translate_dma_region(struct device_node *dev, const __be32 *addr,
phys_addr_t *start, size_t *length);
#ifdef CONFIG_OF_ADDRESS
extern u64 of_translate_address(struct device_node *np, const __be32 *addr);
extern int of_address_to_resource(struct device_node *dev, int index,
struct resource *r);
extern void __iomem *of_iomap(struct device_node *device, int index);
void __iomem *of_io_request_and_map(struct device_node *device,
int index, const char *name);
/* Extract an address from a device, returns the region size and
* the address space flags too. The PCI version uses a BAR number
* instead of an absolute index
*/
extern const __be32 *__of_get_address(struct device_node *dev, int index, int bar_no,
u64 *size, unsigned int *flags);
int of_property_read_reg(struct device_node *np, int idx, u64 *addr, u64 *size);
extern int of_pci_range_parser_init(struct of_pci_range_parser *parser,
struct device_node *node);
extern int of_pci_dma_range_parser_init(struct of_pci_range_parser *parser,
struct device_node *node);
extern struct of_pci_range *of_pci_range_parser_one(
struct of_pci_range_parser *parser,
struct of_pci_range *range);
extern int of_pci_address_to_resource(struct device_node *dev, int bar,
struct resource *r);
extern int of_pci_range_to_resource(struct of_pci_range *range,
struct device_node *np,
struct resource *res);
extern int of_range_to_resource(struct device_node *np, int index,
struct resource *res);
extern bool of_dma_is_coherent(struct device_node *np);
#else /* CONFIG_OF_ADDRESS */
static inline void __iomem *of_io_request_and_map(struct device_node *device,
int index, const char *name)
{
return IOMEM_ERR_PTR(-EINVAL);
}
static inline u64 of_translate_address(struct device_node *np,
const __be32 *addr)
{
return OF_BAD_ADDR;
}
static inline const __be32 *__of_get_address(struct device_node *dev, int index, int bar_no,
u64 *size, unsigned int *flags)
{
return NULL;
}
static inline int of_property_read_reg(struct device_node *np, int idx, u64 *addr, u64 *size)
{
return -ENOSYS;
}
static inline int of_pci_range_parser_init(struct of_pci_range_parser *parser,
struct device_node *node)
{
return -ENOSYS;
}
static inline int of_pci_dma_range_parser_init(struct of_pci_range_parser *parser,
struct device_node *node)
{
return -ENOSYS;
}
static inline struct of_pci_range *of_pci_range_parser_one(
struct of_pci_range_parser *parser,
struct of_pci_range *range)
{
return NULL;
}
static inline int of_pci_address_to_resource(struct device_node *dev, int bar,
struct resource *r)
{
return -ENOSYS;
}
static inline int of_pci_range_to_resource(struct of_pci_range *range,
struct device_node *np,
struct resource *res)
{
return -ENOSYS;
}
static inline int of_range_to_resource(struct device_node *np, int index,
struct resource *res)
{
return -ENOSYS;
}
static inline bool of_dma_is_coherent(struct device_node *np)
{
return false;
}
#endif /* CONFIG_OF_ADDRESS */
#ifdef CONFIG_OF
extern int of_address_to_resource(struct device_node *dev, int index,
struct resource *r);
void __iomem *of_iomap(struct device_node *node, int index);
#else
static inline int of_address_to_resource(struct device_node *dev, int index,
struct resource *r)
{
return -EINVAL;
}
static inline void __iomem *of_iomap(struct device_node *device, int index)
{
return NULL;
}
#endif
#define of_range_parser_init of_pci_range_parser_init
static inline const __be32 *of_get_address(struct device_node *dev, int index,
u64 *size, unsigned int *flags)
{
return __of_get_address(dev, index, -1, size, flags);
}
static inline const __be32 *of_get_pci_address(struct device_node *dev, int bar_no,
u64 *size, unsigned int *flags)
{
return __of_get_address(dev, -1, bar_no, size, flags);
}
static inline int of_address_count(struct device_node *np)
{
struct resource res;
int count = 0;
while (of_address_to_resource(np, count, &res) == 0)
count++;
return count;
}
#endif /* __OF_ADDRESS_H */
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