mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-17 17:24:17 +08:00
e0d072782c
The new field 'dma_range_map' in struct device is used to facilitate the use of single or multiple offsets between mapping regions of cpu addrs and dma addrs. It subsumes the role of "dev->dma_pfn_offset" which was only capable of holding a single uniform offset and had no region bounds checking. The function of_dma_get_range() has been modified so that it takes a single argument -- the device node -- and returns a map, NULL, or an error code. The map is an array that holds the information regarding the DMA regions. Each range entry contains the address offset, the cpu_start address, the dma_start address, and the size of the region. of_dma_configure() is the typical manner to set range offsets but there are a number of ad hoc assignments to "dev->dma_pfn_offset" in the kernel driver code. These cases now invoke the function dma_direct_set_offset(dev, cpu_addr, dma_addr, size). Signed-off-by: Jim Quinlan <james.quinlan@broadcom.com> [hch: various interface cleanups] Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Tested-by: Mathieu Poirier <mathieu.poirier@linaro.org> Tested-by: Nathan Chancellor <natechancellor@gmail.com>
173 lines
5.7 KiB
C
173 lines
5.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
#ifndef _LINUX_OF_PRIVATE_H
|
|
#define _LINUX_OF_PRIVATE_H
|
|
/*
|
|
* Private symbols used by OF support code
|
|
*
|
|
* Paul Mackerras August 1996.
|
|
* Copyright (C) 1996-2005 Paul Mackerras.
|
|
*/
|
|
|
|
/**
|
|
* struct alias_prop - Alias property in 'aliases' node
|
|
* @link: List node to link the structure in aliases_lookup list
|
|
* @alias: Alias property name
|
|
* @np: Pointer to device_node that the alias stands for
|
|
* @id: Index value from end of alias name
|
|
* @stem: Alias string without the index
|
|
*
|
|
* The structure represents one alias property of 'aliases' node as
|
|
* an entry in aliases_lookup list.
|
|
*/
|
|
struct alias_prop {
|
|
struct list_head link;
|
|
const char *alias;
|
|
struct device_node *np;
|
|
int id;
|
|
char stem[];
|
|
};
|
|
|
|
#if defined(CONFIG_SPARC)
|
|
#define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 2
|
|
#else
|
|
#define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1
|
|
#endif
|
|
|
|
#define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1
|
|
|
|
extern struct mutex of_mutex;
|
|
extern struct list_head aliases_lookup;
|
|
extern struct kset *of_kset;
|
|
|
|
#if defined(CONFIG_OF_DYNAMIC)
|
|
extern int of_property_notify(int action, struct device_node *np,
|
|
struct property *prop, struct property *old_prop);
|
|
extern void of_node_release(struct kobject *kobj);
|
|
extern int __of_changeset_apply_entries(struct of_changeset *ocs,
|
|
int *ret_revert);
|
|
extern int __of_changeset_apply_notify(struct of_changeset *ocs);
|
|
extern int __of_changeset_revert_entries(struct of_changeset *ocs,
|
|
int *ret_apply);
|
|
extern int __of_changeset_revert_notify(struct of_changeset *ocs);
|
|
#else /* CONFIG_OF_DYNAMIC */
|
|
static inline int of_property_notify(int action, struct device_node *np,
|
|
struct property *prop, struct property *old_prop)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_OF_DYNAMIC */
|
|
|
|
#if defined(CONFIG_OF_KOBJ)
|
|
int of_node_is_attached(struct device_node *node);
|
|
int __of_add_property_sysfs(struct device_node *np, struct property *pp);
|
|
void __of_remove_property_sysfs(struct device_node *np, struct property *prop);
|
|
void __of_update_property_sysfs(struct device_node *np, struct property *newprop,
|
|
struct property *oldprop);
|
|
int __of_attach_node_sysfs(struct device_node *np);
|
|
void __of_detach_node_sysfs(struct device_node *np);
|
|
#else
|
|
static inline int __of_add_property_sysfs(struct device_node *np, struct property *pp)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void __of_remove_property_sysfs(struct device_node *np, struct property *prop) {}
|
|
static inline void __of_update_property_sysfs(struct device_node *np,
|
|
struct property *newprop, struct property *oldprop) {}
|
|
static inline int __of_attach_node_sysfs(struct device_node *np)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void __of_detach_node_sysfs(struct device_node *np) {}
|
|
#endif
|
|
|
|
#if defined(CONFIG_OF_RESOLVE)
|
|
int of_resolve_phandles(struct device_node *tree);
|
|
#endif
|
|
|
|
void __of_phandle_cache_inv_entry(phandle handle);
|
|
|
|
#if defined(CONFIG_OF_OVERLAY)
|
|
void of_overlay_mutex_lock(void);
|
|
void of_overlay_mutex_unlock(void);
|
|
#else
|
|
static inline void of_overlay_mutex_lock(void) {};
|
|
static inline void of_overlay_mutex_unlock(void) {};
|
|
#endif
|
|
|
|
#if defined(CONFIG_OF_UNITTEST) && defined(CONFIG_OF_OVERLAY)
|
|
extern void __init unittest_unflatten_overlay_base(void);
|
|
#else
|
|
static inline void unittest_unflatten_overlay_base(void) {};
|
|
#endif
|
|
|
|
extern void *__unflatten_device_tree(const void *blob,
|
|
struct device_node *dad,
|
|
struct device_node **mynodes,
|
|
void *(*dt_alloc)(u64 size, u64 align),
|
|
bool detached);
|
|
|
|
/**
|
|
* General utilities for working with live trees.
|
|
*
|
|
* All functions with two leading underscores operate
|
|
* without taking node references, so you either have to
|
|
* own the devtree lock or work on detached trees only.
|
|
*/
|
|
struct property *__of_prop_dup(const struct property *prop, gfp_t allocflags);
|
|
struct device_node *__of_node_dup(const struct device_node *np,
|
|
const char *full_name);
|
|
|
|
struct device_node *__of_find_node_by_path(struct device_node *parent,
|
|
const char *path);
|
|
struct device_node *__of_find_node_by_full_path(struct device_node *node,
|
|
const char *path);
|
|
|
|
extern const void *__of_get_property(const struct device_node *np,
|
|
const char *name, int *lenp);
|
|
extern int __of_add_property(struct device_node *np, struct property *prop);
|
|
extern int __of_add_property_sysfs(struct device_node *np,
|
|
struct property *prop);
|
|
extern int __of_remove_property(struct device_node *np, struct property *prop);
|
|
extern void __of_remove_property_sysfs(struct device_node *np,
|
|
struct property *prop);
|
|
extern int __of_update_property(struct device_node *np,
|
|
struct property *newprop, struct property **oldprop);
|
|
extern void __of_update_property_sysfs(struct device_node *np,
|
|
struct property *newprop, struct property *oldprop);
|
|
|
|
extern int __of_attach_node_sysfs(struct device_node *np);
|
|
extern void __of_detach_node(struct device_node *np);
|
|
extern void __of_detach_node_sysfs(struct device_node *np);
|
|
|
|
extern void __of_sysfs_remove_bin_file(struct device_node *np,
|
|
struct property *prop);
|
|
|
|
/* illegal phandle value (set when unresolved) */
|
|
#define OF_PHANDLE_ILLEGAL 0xdeadbeef
|
|
|
|
/* iterators for transactions, used for overlays */
|
|
/* forward iterator */
|
|
#define for_each_transaction_entry(_oft, _te) \
|
|
list_for_each_entry(_te, &(_oft)->te_list, node)
|
|
|
|
/* reverse iterator */
|
|
#define for_each_transaction_entry_reverse(_oft, _te) \
|
|
list_for_each_entry_reverse(_te, &(_oft)->te_list, node)
|
|
|
|
extern int of_bus_n_addr_cells(struct device_node *np);
|
|
extern int of_bus_n_size_cells(struct device_node *np);
|
|
|
|
struct bus_dma_region;
|
|
#if defined(CONFIG_OF_ADDRESS) && defined(CONFIG_HAS_DMA)
|
|
int of_dma_get_range(struct device_node *np,
|
|
const struct bus_dma_region **map);
|
|
#else
|
|
static inline int of_dma_get_range(struct device_node *np,
|
|
const struct bus_dma_region **map)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
#endif
|
|
|
|
#endif /* _LINUX_OF_PRIVATE_H */
|