mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-23 14:55:48 +07:00
e35635000f
There is a regular need in the kernel to provide a way to declare having a dynamically sized set of trailing elements in a structure. Kernel code should always use “flexible array members”[1] for these cases. The older style of one-element or zero-length arrays should no longer be used[2]. [1] https://en.wikipedia.org/wiki/Flexible_array_member [2] https://github.com/KSPP/linux/issues/21 Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
118 lines
3.1 KiB
C
118 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* System Trace Module (STM) infrastructure
|
|
* Copyright (c) 2014, Intel Corporation.
|
|
*
|
|
* STM class implements generic infrastructure for System Trace Module devices
|
|
* as defined in MIPI STPv2 specification.
|
|
*/
|
|
|
|
#ifndef _STM_STM_H_
|
|
#define _STM_STM_H_
|
|
|
|
#include <linux/configfs.h>
|
|
|
|
struct stp_policy;
|
|
struct stp_policy_node;
|
|
struct stm_protocol_driver;
|
|
|
|
int stp_configfs_init(void);
|
|
void stp_configfs_exit(void);
|
|
|
|
void *stp_policy_node_priv(struct stp_policy_node *pn);
|
|
|
|
struct stp_master {
|
|
unsigned int nr_free;
|
|
unsigned long chan_map[];
|
|
};
|
|
|
|
struct stm_device {
|
|
struct device dev;
|
|
struct module *owner;
|
|
struct stp_policy *policy;
|
|
struct mutex policy_mutex;
|
|
int major;
|
|
unsigned int sw_nmasters;
|
|
struct stm_data *data;
|
|
struct mutex link_mutex;
|
|
spinlock_t link_lock;
|
|
struct list_head link_list;
|
|
/* framing protocol in use */
|
|
const struct stm_protocol_driver *pdrv;
|
|
const struct config_item_type *pdrv_node_type;
|
|
/* master allocation */
|
|
spinlock_t mc_lock;
|
|
struct stp_master *masters[];
|
|
};
|
|
|
|
#define to_stm_device(_d) \
|
|
container_of((_d), struct stm_device, dev)
|
|
|
|
struct stp_policy_node *
|
|
stp_policy_node_lookup(struct stm_device *stm, char *s);
|
|
void stp_policy_node_put(struct stp_policy_node *policy_node);
|
|
void stp_policy_unbind(struct stp_policy *policy);
|
|
|
|
void stp_policy_node_get_ranges(struct stp_policy_node *policy_node,
|
|
unsigned int *mstart, unsigned int *mend,
|
|
unsigned int *cstart, unsigned int *cend);
|
|
|
|
const struct config_item_type *
|
|
get_policy_node_type(struct configfs_attribute **attrs);
|
|
|
|
struct stm_output {
|
|
spinlock_t lock;
|
|
unsigned int master;
|
|
unsigned int channel;
|
|
unsigned int nr_chans;
|
|
void *pdrv_private;
|
|
};
|
|
|
|
struct stm_file {
|
|
struct stm_device *stm;
|
|
struct stm_output output;
|
|
};
|
|
|
|
struct stm_device *stm_find_device(const char *name);
|
|
void stm_put_device(struct stm_device *stm);
|
|
|
|
struct stm_source_device {
|
|
struct device dev;
|
|
struct stm_source_data *data;
|
|
spinlock_t link_lock;
|
|
struct stm_device __rcu *link;
|
|
struct list_head link_entry;
|
|
/* one output per stm_source device */
|
|
struct stm_output output;
|
|
};
|
|
|
|
#define to_stm_source_device(_d) \
|
|
container_of((_d), struct stm_source_device, dev)
|
|
|
|
void *to_pdrv_policy_node(struct config_item *item);
|
|
|
|
struct stm_protocol_driver {
|
|
struct module *owner;
|
|
const char *name;
|
|
ssize_t (*write)(struct stm_data *data,
|
|
struct stm_output *output, unsigned int chan,
|
|
const char *buf, size_t count);
|
|
void (*policy_node_init)(void *arg);
|
|
int (*output_open)(void *priv, struct stm_output *output);
|
|
void (*output_close)(struct stm_output *output);
|
|
ssize_t priv_sz;
|
|
struct configfs_attribute **policy_attr;
|
|
};
|
|
|
|
int stm_register_protocol(const struct stm_protocol_driver *pdrv);
|
|
void stm_unregister_protocol(const struct stm_protocol_driver *pdrv);
|
|
int stm_lookup_protocol(const char *name,
|
|
const struct stm_protocol_driver **pdrv,
|
|
const struct config_item_type **type);
|
|
void stm_put_protocol(const struct stm_protocol_driver *pdrv);
|
|
ssize_t stm_data_write(struct stm_data *data, unsigned int m,
|
|
unsigned int c, bool ts_first, const void *buf,
|
|
size_t count);
|
|
|
|
#endif /* _STM_STM_H_ */
|