diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-generic/global_data.h | 7 | ||||
| -rw-r--r-- | include/cyclic.h | 138 | ||||
| -rw-r--r-- | include/time.h | 19 | ||||
| -rw-r--r-- | include/watchdog.h | 23 |
4 files changed, 184 insertions, 3 deletions
diff --git a/include/asm-generic/global_data.h b/include/asm-generic/global_data.h index 805a6fd6797..9006c769279 100644 --- a/include/asm-generic/global_data.h +++ b/include/asm-generic/global_data.h @@ -20,6 +20,7 @@ */ #ifndef __ASSEMBLY__ +#include <cyclic.h> #include <event_internal.h> #include <fdtdec.h> #include <membuff.h> @@ -474,6 +475,12 @@ struct global_data { */ struct event_state event_state; #endif +#ifdef CONFIG_CYCLIC + /** + * @cyclic: cyclic driver data + */ + struct cyclic_drv *cyclic; +#endif /** * @dmtag_list: List of DM tags */ diff --git a/include/cyclic.h b/include/cyclic.h new file mode 100644 index 00000000000..23902234cc8 --- /dev/null +++ b/include/cyclic.h @@ -0,0 +1,138 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * A general-purpose cyclic execution infrastructure, to allow "small" + * (run-time wise) functions to be executed at a specified frequency. + * Things like LED blinking or watchdog triggering are examples for such + * tasks. + * + * Copyright (C) 2022 Stefan Roese <[email protected]> + */ + +#ifndef __cyclic_h +#define __cyclic_h + +#include <linux/list.h> +#include <asm/types.h> + +/** + * struct cyclic_drv - Cyclic driver internal data + * + * @cyclic_list: Cylic list node + * @cyclic_ready: Flag if cyclic infrastructure is ready + * @cyclic_running: Flag if cyclic infrastructure is running + */ +struct cyclic_drv { + struct list_head cyclic_list; + bool cyclic_ready; + bool cyclic_running; +}; + +/** + * struct cyclic_info - Information about cyclic execution function + * + * @func: Function to call periodically + * @ctx: Context pointer to get passed to this function + * @name: Name of the cyclic function, e.g. shown in the commands + * @delay_ns: Delay is ns after which this function shall get executed + * @start_time_us: Start time in us, when this function started its execution + * @cpu_time_us: Total CPU time of this function + * @run_cnt: Counter of executions occurances + * @next_call: Next time in us, when the function shall be executed again + * @list: List node + */ +struct cyclic_info { + void (*func)(void *ctx); + void *ctx; + char *name; + uint64_t delay_us; + uint64_t start_time_us; + uint64_t cpu_time_us; + uint64_t run_cnt; + uint64_t next_call; + struct list_head list; +}; + +/** Function type for cyclic functions */ +typedef void (*cyclic_func_t)(void *ctx); + +#if defined(CONFIG_CYCLIC) +/** + * cyclic_register - Register a new cyclic function + * + * @func: Function to call periodically + * @delay_us: Delay is us after which this function shall get executed + * @name: Cyclic function name/id + * @ctx: Context to pass to the function + * @return: pointer to cyclic_struct if OK, NULL on error + */ +struct cyclic_info *cyclic_register(cyclic_func_t func, uint64_t delay_us, + const char *name, void *ctx); + +/** + * cyclic_unregister - Unregister a cyclic function + * + * @cyclic: Pointer to cyclic_struct of the function that shall be removed + * @return: 0 if OK, -ve on error + */ +int cyclic_unregister(struct cyclic_info *cyclic); + +/** + * cyclic_init() - Set up cyclic functions + * + * Init a list of cyclic functions, so that these can be added as needed + */ +int cyclic_init(void); + +/** + * cyclic_uninit() - Clean up cyclic functions + * + * This removes all cyclic functions + */ +int cyclic_uninit(void); + +/** + * cyclic_get_list() - Get cyclic list pointer + * + * Return the cyclic list pointer + * + * @return: pointer to cyclic_list + */ +struct list_head *cyclic_get_list(void); + +/** + * cyclic_run() - Interate over all registered cyclic functions + * + * Interate over all registered cyclic functions and if the it's function + * needs to be executed, then call into these registered functions. + */ +void cyclic_run(void); +#else +static inline struct cyclic_info *cyclic_register(cyclic_func_t func, + uint64_t delay_us, + const char *name, + void *ctx) +{ + return NULL; +} + +static inline int cyclic_unregister(struct cyclic_info *cyclic) +{ + return 0; +} + +static inline void cyclic_run(void) +{ +} + +static inline int cyclic_init(void) +{ + return 0; +} + +static inline int cyclic_uninit(void) +{ + return 0; +} +#endif + +#endif diff --git a/include/time.h b/include/time.h index 9deb2cf61cc..3b2ba091247 100644 --- a/include/time.h +++ b/include/time.h @@ -83,6 +83,25 @@ uint64_t usec_to_tick(unsigned long usec); (time_after_eq(a,b) && \ time_before(a,c)) +/* Same as above, but does so with platform independent 64bit types. + * These must be used when utilizing jiffies_64 (i.e. return value of + * get_jiffies_64() */ +#define time_after64(a,b) \ + (typecheck(__u64, a) && \ + typecheck(__u64, b) && \ + ((__s64)((b) - (a)) < 0)) +#define time_before64(a,b) time_after64(b,a) + +#define time_after_eq64(a,b) \ + (typecheck(__u64, a) && \ + typecheck(__u64, b) && \ + ((__s64)((a) - (b)) >= 0)) +#define time_before_eq64(a,b) time_after_eq64(b,a) + +#define time_in_range64(a, b, c) \ + (time_after_eq64(a, b) && \ + time_before_eq64(a, c)) + /** * usec2ticks() - Convert microseconds to internal ticks * diff --git a/include/watchdog.h b/include/watchdog.h index 813cc8f2a5d..0a9777edcba 100644 --- a/include/watchdog.h +++ b/include/watchdog.h @@ -11,6 +11,8 @@ #define _WATCHDOG_H_ #if !defined(__ASSEMBLY__) +#include <cyclic.h> + /* * Reset the watchdog timer, always returns 0 * @@ -60,11 +62,16 @@ int init_func_watchdog_reset(void); /* Don't require the watchdog to be enabled in SPL */ #if defined(CONFIG_SPL_BUILD) && \ !defined(CONFIG_SPL_WATCHDOG) - #define WATCHDOG_RESET() {} + #define WATCHDOG_RESET() { \ + cyclic_run(); \ + } #else extern void watchdog_reset(void); - #define WATCHDOG_RESET watchdog_reset + #define WATCHDOG_RESET() { \ + watchdog_reset(); \ + cyclic_run(); \ + } #endif #endif #else @@ -74,11 +81,21 @@ int init_func_watchdog_reset(void); #if defined(__ASSEMBLY__) #define WATCHDOG_RESET /*XXX DO_NOT_DEL_THIS_COMMENT*/ #else - #define WATCHDOG_RESET() {} + #define WATCHDOG_RESET() { \ + cyclic_run(); \ + } #endif /* __ASSEMBLY__ */ #endif /* CONFIG_WATCHDOG && !__ASSEMBLY__ */ #endif /* CONFIG_HW_WATCHDOG */ +#if !defined(__ASSEMBLY__) +/* Currently only needed for fs/cramfs/uncompress.c */ +static inline void watchdog_reset_func(void) +{ + WATCHDOG_RESET(); +} +#endif + /* * Prototypes from $(CPU)/cpu.c. */ |