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Bluetooth: Controller: Config ticker with slot window to yield

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Add Kconfig option to conditionally enable tickers with slot
window to yield to normal tickers and be placed at the end
of their slot window if possible.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
This commit is contained in:
Vinayak Kariappa Chettimada 2022-05-31 22:00:29 +05:30 • committed by Carles Cufí
commit 1a56f766bc
2 changed files with 13 additions and 0 deletions
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8
subsys/bluetooth/controller/Kconfig.ll_sw_split
View file

@ -720,6 +720,14 @@ config BT_TICKER_EXT
are invoked by using available '_ext' versions of ticker interface are invoked by using available '_ext' versions of ticker interface
functions. functions.
config BT_TICKER_EXT_SLOT_WINDOW_YIELD
bool "Tickers with slot window always yields"
depends on BT_TICKER_EXT
default y if BT_CTLR_ADV_ISO
help
This options forces tickers with slot window extensions to yield to
normal tickers and be placed at the end of their slot window.
config BT_TICKER_SLOT_AGNOSTIC config BT_TICKER_SLOT_AGNOSTIC
bool "Slot agnostic ticker mode" bool "Slot agnostic ticker mode"
help help

5
subsys/bluetooth/controller/ticker/ticker.c
View file

@ -807,6 +807,7 @@ static uint8_t ticker_resolve_collision(struct ticker_node *nodes,
(lazy_next - ticker_next->priority) > (lazy_next - ticker_next->priority) >
(lazy_current - ticker->priority); (lazy_current - ticker->priority);
#if defined(CONFIG_BT_TICKER_EXT_SLOT_WINDOW_YIELD)
/* Can the current ticker with ticks_slot_window be /* Can the current ticker with ticks_slot_window be
* scheduled after the colliding ticker? * scheduled after the colliding ticker?
*/ */
@ -829,6 +830,10 @@ static uint8_t ticker_resolve_collision(struct ticker_node *nodes,
ticker_next->ext_data->ticks_slot_window - ticker_next->ext_data->ticks_slot_window -
ticker_next->ticks_slot) < ticker_next->ticks_slot) <
ticker->ticks_slot)); ticker->ticks_slot));
#else /* !CONFIG_BT_TICKER_EXT_SLOT_WINDOW_YIELD */
uint8_t curr_has_ticks_slot_window = 0U;
uint8_t next_not_ticks_slot_window = 1U;
#endif /* !CONFIG_BT_TICKER_EXT_SLOT_WINDOW_YIELD */
/* Check if next node is within this reservation slot /* Check if next node is within this reservation slot
* and wins conflict resolution * and wins conflict resolution