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Bluetooth: controller: Add ticker_yield_abs interface

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Add ticker_yield_abs interface to reduce ticks_slot_previous
value when radio events yield/stop earlier than their time
reservations.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
This commit is contained in:
Vinayak Kariappa Chettimada 2021-05-16 13:57:36 +05:30 committed by Carles Cufí
parent 9f8c180522
commit bce82ad49b
2 changed files with 94 additions and 25 deletions
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110
subsys/bluetooth/controller/ticker/ticker.c
View file

@ -99,8 +99,9 @@ struct ticker_node {
#define TICKER_USER_OP_TYPE_PRIORITY_SET 3
#define TICKER_USER_OP_TYPE_START 4
#define TICKER_USER_OP_TYPE_UPDATE 5
#define TICKER_USER_OP_TYPE_STOP 6
#define TICKER_USER_OP_TYPE_STOP_ABS 7
#define TICKER_USER_OP_TYPE_YIELD_ABS 6
#define TICKER_USER_OP_TYPE_STOP 7
#define TICKER_USER_OP_TYPE_STOP_ABS 8
/* Slot window re-schedule states */
#define TICKER_RESCHEDULE_STATE_NONE 0
@ -166,11 +167,11 @@ struct ticker_user_op_update {
#endif
};
/* User operation data structure for stop opcode. Used for passing stop
* requests with absolute tick to ticker_job
/* User operation data structure for yield/stop opcode. Used for passing yield/
* stop requests with absolute tick to ticker_job
*/
struct ticker_user_op_stop {
uint32_t ticks_at_stop; /* Anchor ticks (absolute) */
struct ticker_user_op_yield {
uint32_t ticks_at_yield; /* Anchor ticks (absolute) */
};
/* User operation data structure for slot_get opcode. Used for passing request
@ -205,7 +206,7 @@ struct ticker_user_op {
union {
struct ticker_user_op_start start;
struct ticker_user_op_update update;
struct ticker_user_op_stop stop;
struct ticker_user_op_yield yield;
struct ticker_user_op_slot_get slot_get;
struct ticker_user_op_priority_set priority_set;
} params; /* User operation parameters */
@ -1279,11 +1280,12 @@ static inline void ticker_job_node_manage(struct ticker_instance *instance,
uint32_t ticks_elapsed,
uint8_t *insert_head)
{
/* Handle update of ticker by re-inserting it back. */
if (user_op->op == TICKER_USER_OP_TYPE_UPDATE) {
/* Remove ticker node from list */
ticker->ticks_to_expire = ticker_dequeue(instance, user_op->id);
/* Handle update of ticker by re-inserting it back. */
if (user_op->op == TICKER_USER_OP_TYPE_UPDATE) {
/* Update node and insert back */
ticker_job_node_update(ticker, user_op, instance->ticks_current,
ticks_elapsed, insert_head);
@ -1292,33 +1294,42 @@ static inline void ticker_job_node_manage(struct ticker_instance *instance,
*/
ticker->req++;
} else {
/* If stop/stop_abs requested, then dequeue node */
if (user_op->op != TICKER_USER_OP_TYPE_YIELD_ABS) {
/* Remove ticker node from list */
ticker->ticks_to_expire = ticker_dequeue(instance,
user_op->id);
/* Reset schedule status of node */
ticker->req = ticker->ack;
}
/* If yield_abs/stop/stop_abs then adjust ticks_slot_previous */
if (instance->ticker_id_slot_previous == user_op->id) {
uint32_t ticks_current;
uint32_t ticks_at_stop;
uint32_t ticks_at_yield;
uint32_t ticks_used;
instance->ticker_id_slot_previous = TICKER_NULL;
if (user_op->op == TICKER_USER_OP_TYPE_STOP_ABS) {
ticks_at_stop =
user_op->params.stop.ticks_at_stop;
if ((user_op->op == TICKER_USER_OP_TYPE_YIELD_ABS) ||
(user_op->op == TICKER_USER_OP_TYPE_STOP_ABS)) {
ticks_at_yield =
user_op->params.yield.ticks_at_yield;
} else {
ticks_at_stop = cntr_cnt_get();
ticks_at_yield = cntr_cnt_get();
}
ticks_current = instance->ticks_current;
if (!((ticks_at_stop - ticks_current) &
if (!((ticks_at_yield - ticks_current) &
BIT(HAL_TICKER_CNTR_MSBIT))) {
ticks_used = ticks_elapsed +
ticker_ticks_diff_get(ticks_at_stop,
ticker_ticks_diff_get(ticks_at_yield,
ticks_current);
} else {
ticks_used =
ticker_ticks_diff_get(ticks_current,
ticks_at_stop);
ticks_at_yield);
if (ticks_elapsed > ticks_used) {
ticks_used = ticks_elapsed -
ticks_used;
@ -1425,7 +1436,7 @@ static inline uint8_t ticker_job_list_manage(struct ticker_instance *instance,
continue;
}
/* Delete node, if not expired */
/* Delete or yield node, if not expired */
if (state == 1U) {
ticker_job_node_manage(instance, ticker,
user_op, ticks_elapsed,
@ -2808,6 +2819,61 @@ uint32_t ticker_update_ext(uint8_t instance_index, uint8_t user_id,
return user_op->status;
}
/**
* @brief Yield a ticker node with supplied absolute ticks reference
*
* @details Creates a new user operation of type TICKER_USER_OP_TYPE_YIELD_ABS
* and schedules the ticker_job.
*
* @param instance_index Index of ticker instance
* @param user_id Ticker user id. Used for indexing user operations
* and mapping to mayfly caller id
* @param ticks_at_yield Absolute tick count at ticker yield request
* @param fp_op_func Function pointer of user operation completion
* function
* @param op_context Context passed in operation completion call
*
* @return TICKER_STATUS_BUSY if stop was successful but not yet completed.
* TICKER_STATUS_FAILURE is returned if there are no more user operations
* available, and TICKER_STATUS_SUCCESS is returned if ticker_job gets to run
* before exiting ticker_stop
*/
uint32_t ticker_yield_abs(uint8_t instance_index, uint8_t user_id,
uint8_t ticker_id, uint32_t ticks_at_yield,
ticker_op_func fp_op_func, void *op_context)
{
struct ticker_instance *instance = &_instance[instance_index];
struct ticker_user_op *user_op;
struct ticker_user *user;
uint8_t last;
user = &instance->users[user_id];
last = user->last + 1;
if (last >= user->count_user_op) {
last = 0U;
}
if (last == user->first) {
return TICKER_STATUS_FAILURE;
}
user_op = &user->user_op[user->last];
user_op->op = TICKER_USER_OP_TYPE_YIELD_ABS;
user_op->id = ticker_id;
user_op->params.yield.ticks_at_yield = ticks_at_yield;
user_op->status = TICKER_STATUS_BUSY;
user_op->fp_op_func = fp_op_func;
user_op->op_context = op_context;
user->last = last;
instance->sched_cb(instance->caller_id_get_cb(user_id),
TICKER_CALL_ID_JOB, 0, instance);
return user_op->status;
}
/**
* @brief Stop a ticker node
*
@ -2879,9 +2945,9 @@ uint32_t ticker_stop(uint8_t instance_index, uint8_t user_id, uint8_t ticker_id,
* available, and TICKER_STATUS_SUCCESS is returned if ticker_job gets to run
* before exiting ticker_stop
*/
uint32_t ticker_stop_abs(uint8_t instance_index, uint8_t user_id, uint8_t ticker_id,
uint32_t ticks_at_stop, ticker_op_func fp_op_func,
void *op_context)
uint32_t ticker_stop_abs(uint8_t instance_index, uint8_t user_id,
uint8_t ticker_id, uint32_t ticks_at_stop,
ticker_op_func fp_op_func, void *op_context)
{
struct ticker_instance *instance = &_instance[instance_index];
struct ticker_user_op *user_op;
@ -2902,7 +2968,7 @@ uint32_t ticker_stop_abs(uint8_t instance_index, uint8_t user_id, uint8_t ticker
user_op = &user->user_op[user->last];
user_op->op = TICKER_USER_OP_TYPE_STOP_ABS;
user_op->id = ticker_id;
user_op->params.stop.ticks_at_stop = ticks_at_stop;
user_op->params.yield.ticks_at_yield = ticks_at_stop;
user_op->status = TICKER_STATUS_BUSY;
user_op->fp_op_func = fp_op_func;
user_op->op_context = op_context;

3
subsys/bluetooth/controller/ticker/ticker.h
View file

@ -151,6 +151,9 @@ uint32_t ticker_update(uint8_t instance_index, uint8_t user_id, uint8_t ticker_i
uint32_t ticks_drift_plus, uint32_t ticks_drift_minus,
uint32_t ticks_slot_plus, uint32_t ticks_slot_minus, uint16_t lazy,
uint8_t force, ticker_op_func fp_op_func, void *op_context);
uint32_t ticker_yield_abs(uint8_t instance_index, uint8_t user_id,
uint8_t ticker_id, uint32_t ticks_at_yield,
ticker_op_func fp_op_func, void *op_context);
uint32_t ticker_stop(uint8_t instance_index, uint8_t user_id, uint8_t ticker_id,
ticker_op_func fp_op_func, void *op_context);
uint32_t ticker_stop_abs(uint8_t instance_index, uint8_t user_id, uint8_t ticker_id,