mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-28 20:02:17 +00:00
![Saravana Kannan](/assets/img/avatar_default.png)
Consolidate the code that computes the flags to be used when creating a
device link from a fwnode link.
Fixes: 2de9d8e0d2
("driver core: fw_devlink: Improve handling of cyclic dependencies")
Signed-off-by: Saravana Kannan <saravanak@google.com>
Tested-by: Colin Foster <colin.foster@in-advantage.com>
Tested-by: Sudeep Holla <sudeep.holla@arm.com>
Tested-by: Douglas Anderson <dianders@chromium.org>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Luca Weiss <luca.weiss@fairphone.com> # qcom/sm7225-fairphone-fp4
Link: https://lore.kernel.org/r/20230207014207.1678715-8-saravanak@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
215 lines
7.5 KiB
C
215 lines
7.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* fwnode.h - Firmware device node object handle type definition.
|
|
*
|
|
* Copyright (C) 2015, Intel Corporation
|
|
* Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
|
|
*/
|
|
|
|
#ifndef _LINUX_FWNODE_H_
|
|
#define _LINUX_FWNODE_H_
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/list.h>
|
|
#include <linux/bits.h>
|
|
#include <linux/err.h>
|
|
|
|
struct fwnode_operations;
|
|
struct device;
|
|
|
|
/*
|
|
* fwnode flags
|
|
*
|
|
* LINKS_ADDED: The fwnode has already be parsed to add fwnode links.
|
|
* NOT_DEVICE: The fwnode will never be populated as a struct device.
|
|
* INITIALIZED: The hardware corresponding to fwnode has been initialized.
|
|
* NEEDS_CHILD_BOUND_ON_ADD: For this fwnode/device to probe successfully, its
|
|
* driver needs its child devices to be bound with
|
|
* their respective drivers as soon as they are
|
|
* added.
|
|
* BEST_EFFORT: The fwnode/device needs to probe early and might be missing some
|
|
* suppliers. Only enforce ordering with suppliers that have
|
|
* drivers.
|
|
*/
|
|
#define FWNODE_FLAG_LINKS_ADDED BIT(0)
|
|
#define FWNODE_FLAG_NOT_DEVICE BIT(1)
|
|
#define FWNODE_FLAG_INITIALIZED BIT(2)
|
|
#define FWNODE_FLAG_NEEDS_CHILD_BOUND_ON_ADD BIT(3)
|
|
#define FWNODE_FLAG_BEST_EFFORT BIT(4)
|
|
#define FWNODE_FLAG_VISITED BIT(5)
|
|
|
|
struct fwnode_handle {
|
|
struct fwnode_handle *secondary;
|
|
const struct fwnode_operations *ops;
|
|
struct device *dev;
|
|
struct list_head suppliers;
|
|
struct list_head consumers;
|
|
u8 flags;
|
|
};
|
|
|
|
/*
|
|
* fwnode link flags
|
|
*
|
|
* CYCLE: The fwnode link is part of a cycle. Don't defer probe.
|
|
*/
|
|
#define FWLINK_FLAG_CYCLE BIT(0)
|
|
|
|
struct fwnode_link {
|
|
struct fwnode_handle *supplier;
|
|
struct list_head s_hook;
|
|
struct fwnode_handle *consumer;
|
|
struct list_head c_hook;
|
|
u8 flags;
|
|
};
|
|
|
|
/**
|
|
* struct fwnode_endpoint - Fwnode graph endpoint
|
|
* @port: Port number
|
|
* @id: Endpoint id
|
|
* @local_fwnode: reference to the related fwnode
|
|
*/
|
|
struct fwnode_endpoint {
|
|
unsigned int port;
|
|
unsigned int id;
|
|
const struct fwnode_handle *local_fwnode;
|
|
};
|
|
|
|
/*
|
|
* ports and endpoints defined as software_nodes should all follow a common
|
|
* naming scheme; use these macros to ensure commonality.
|
|
*/
|
|
#define SWNODE_GRAPH_PORT_NAME_FMT "port@%u"
|
|
#define SWNODE_GRAPH_ENDPOINT_NAME_FMT "endpoint@%u"
|
|
|
|
#define NR_FWNODE_REFERENCE_ARGS 8
|
|
|
|
/**
|
|
* struct fwnode_reference_args - Fwnode reference with additional arguments
|
|
* @fwnode:- A reference to the base fwnode
|
|
* @nargs: Number of elements in @args array
|
|
* @args: Integer arguments on the fwnode
|
|
*/
|
|
struct fwnode_reference_args {
|
|
struct fwnode_handle *fwnode;
|
|
unsigned int nargs;
|
|
u64 args[NR_FWNODE_REFERENCE_ARGS];
|
|
};
|
|
|
|
/**
|
|
* struct fwnode_operations - Operations for fwnode interface
|
|
* @get: Get a reference to an fwnode.
|
|
* @put: Put a reference to an fwnode.
|
|
* @device_is_available: Return true if the device is available.
|
|
* @device_get_match_data: Return the device driver match data.
|
|
* @property_present: Return true if a property is present.
|
|
* @property_read_int_array: Read an array of integer properties. Return zero on
|
|
* success, a negative error code otherwise.
|
|
* @property_read_string_array: Read an array of string properties. Return zero
|
|
* on success, a negative error code otherwise.
|
|
* @get_name: Return the name of an fwnode.
|
|
* @get_name_prefix: Get a prefix for a node (for printing purposes).
|
|
* @get_parent: Return the parent of an fwnode.
|
|
* @get_next_child_node: Return the next child node in an iteration.
|
|
* @get_named_child_node: Return a child node with a given name.
|
|
* @get_reference_args: Return a reference pointed to by a property, with args
|
|
* @graph_get_next_endpoint: Return an endpoint node in an iteration.
|
|
* @graph_get_remote_endpoint: Return the remote endpoint node of a local
|
|
* endpoint node.
|
|
* @graph_get_port_parent: Return the parent node of a port node.
|
|
* @graph_parse_endpoint: Parse endpoint for port and endpoint id.
|
|
* @add_links: Create fwnode links to all the suppliers of the fwnode. Return
|
|
* zero on success, a negative error code otherwise.
|
|
*/
|
|
struct fwnode_operations {
|
|
struct fwnode_handle *(*get)(struct fwnode_handle *fwnode);
|
|
void (*put)(struct fwnode_handle *fwnode);
|
|
bool (*device_is_available)(const struct fwnode_handle *fwnode);
|
|
const void *(*device_get_match_data)(const struct fwnode_handle *fwnode,
|
|
const struct device *dev);
|
|
bool (*device_dma_supported)(const struct fwnode_handle *fwnode);
|
|
enum dev_dma_attr
|
|
(*device_get_dma_attr)(const struct fwnode_handle *fwnode);
|
|
bool (*property_present)(const struct fwnode_handle *fwnode,
|
|
const char *propname);
|
|
int (*property_read_int_array)(const struct fwnode_handle *fwnode,
|
|
const char *propname,
|
|
unsigned int elem_size, void *val,
|
|
size_t nval);
|
|
int
|
|
(*property_read_string_array)(const struct fwnode_handle *fwnode_handle,
|
|
const char *propname, const char **val,
|
|
size_t nval);
|
|
const char *(*get_name)(const struct fwnode_handle *fwnode);
|
|
const char *(*get_name_prefix)(const struct fwnode_handle *fwnode);
|
|
struct fwnode_handle *(*get_parent)(const struct fwnode_handle *fwnode);
|
|
struct fwnode_handle *
|
|
(*get_next_child_node)(const struct fwnode_handle *fwnode,
|
|
struct fwnode_handle *child);
|
|
struct fwnode_handle *
|
|
(*get_named_child_node)(const struct fwnode_handle *fwnode,
|
|
const char *name);
|
|
int (*get_reference_args)(const struct fwnode_handle *fwnode,
|
|
const char *prop, const char *nargs_prop,
|
|
unsigned int nargs, unsigned int index,
|
|
struct fwnode_reference_args *args);
|
|
struct fwnode_handle *
|
|
(*graph_get_next_endpoint)(const struct fwnode_handle *fwnode,
|
|
struct fwnode_handle *prev);
|
|
struct fwnode_handle *
|
|
(*graph_get_remote_endpoint)(const struct fwnode_handle *fwnode);
|
|
struct fwnode_handle *
|
|
(*graph_get_port_parent)(struct fwnode_handle *fwnode);
|
|
int (*graph_parse_endpoint)(const struct fwnode_handle *fwnode,
|
|
struct fwnode_endpoint *endpoint);
|
|
void __iomem *(*iomap)(struct fwnode_handle *fwnode, int index);
|
|
int (*irq_get)(const struct fwnode_handle *fwnode, unsigned int index);
|
|
int (*add_links)(struct fwnode_handle *fwnode);
|
|
};
|
|
|
|
#define fwnode_has_op(fwnode, op) \
|
|
(!IS_ERR_OR_NULL(fwnode) && (fwnode)->ops && (fwnode)->ops->op)
|
|
|
|
#define fwnode_call_int_op(fwnode, op, ...) \
|
|
(fwnode_has_op(fwnode, op) ? \
|
|
(fwnode)->ops->op(fwnode, ## __VA_ARGS__) : (IS_ERR_OR_NULL(fwnode) ? -EINVAL : -ENXIO))
|
|
|
|
#define fwnode_call_bool_op(fwnode, op, ...) \
|
|
(fwnode_has_op(fwnode, op) ? \
|
|
(fwnode)->ops->op(fwnode, ## __VA_ARGS__) : false)
|
|
|
|
#define fwnode_call_ptr_op(fwnode, op, ...) \
|
|
(fwnode_has_op(fwnode, op) ? \
|
|
(fwnode)->ops->op(fwnode, ## __VA_ARGS__) : NULL)
|
|
#define fwnode_call_void_op(fwnode, op, ...) \
|
|
do { \
|
|
if (fwnode_has_op(fwnode, op)) \
|
|
(fwnode)->ops->op(fwnode, ## __VA_ARGS__); \
|
|
} while (false)
|
|
#define get_dev_from_fwnode(fwnode) get_device((fwnode)->dev)
|
|
|
|
static inline void fwnode_init(struct fwnode_handle *fwnode,
|
|
const struct fwnode_operations *ops)
|
|
{
|
|
fwnode->ops = ops;
|
|
INIT_LIST_HEAD(&fwnode->consumers);
|
|
INIT_LIST_HEAD(&fwnode->suppliers);
|
|
}
|
|
|
|
static inline void fwnode_dev_initialized(struct fwnode_handle *fwnode,
|
|
bool initialized)
|
|
{
|
|
if (IS_ERR_OR_NULL(fwnode))
|
|
return;
|
|
|
|
if (initialized)
|
|
fwnode->flags |= FWNODE_FLAG_INITIALIZED;
|
|
else
|
|
fwnode->flags &= ~FWNODE_FLAG_INITIALIZED;
|
|
}
|
|
|
|
extern bool fw_devlink_is_strict(void);
|
|
int fwnode_link_add(struct fwnode_handle *con, struct fwnode_handle *sup);
|
|
void fwnode_links_purge(struct fwnode_handle *fwnode);
|
|
void fw_devlink_purge_absent_suppliers(struct fwnode_handle *fwnode);
|
|
|
|
#endif
|