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Bluetooth: Controller: Fix to stop Extended Auxiliary Scan context

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Fix any stray Extended Auxiliary PDU from being scanned
when disabling Extended Scanning.

Updated Extended Scan disable implementation to find any
active auxiliary scan context and stop them.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
This commit is contained in:
Vinayak Kariappa Chettimada 2021-12-13 07:04:53 +05:30 committed by Carles Cufí
parent ffeee6ce1f
commit a5fb434705
4 changed files with 115 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
subsys/bluetooth/controller/ll_sw/ull_scan.c
View File

@ -355,13 +355,20 @@ void ull_scan_params_set(struct lll_scan *lll, uint8_t type, uint16_t interval,
uint8_t ull_scan_enable(struct ll_scan_set *scan)
{
struct lll_scan *lll = &scan->lll;
uint32_t ticks_slot_overhead;
uint32_t volatile ret_cb;
uint32_t ticks_interval;
uint32_t ticks_anchor;
struct lll_scan *lll;
uint32_t ret;
#if defined(CONFIG_BT_CTLR_ADV_EXT)
/* Initialize extend scan stop request */
scan->is_stop = 0U;
#endif /* CONFIG_BT_CTLR_ADV_EXT */
/* Initialize LLL scan context */
lll = &scan->lll;
lll->init_addr_type = scan->own_addr_type;
(void)ll_addr_read(lll->init_addr_type, lll->init_addr);
lll->chan = 0U;
@ -462,6 +469,12 @@ uint8_t ull_scan_disable(uint8_t handle, struct ll_scan_set *scan)
{
int err;
#if defined(CONFIG_BT_CTLR_ADV_EXT)
/* Request Extended Scan stop */
scan->is_stop = 1U;
cpu_dmb();
#endif /* CONFIG_BT_CTLR_ADV_EXT */
err = ull_ticker_stop_with_mark(TICKER_ID_SCAN_BASE + handle,
scan, &scan->lll);
LL_ASSERT(err == 0 || err == -EALREADY);
@ -469,6 +482,30 @@ uint8_t ull_scan_disable(uint8_t handle, struct ll_scan_set *scan)
return BT_HCI_ERR_CMD_DISALLOWED;
}
#if defined(CONFIG_BT_CTLR_ADV_EXT)
/* Find and stop associated auxiliary scan contexts */
for (uint8_t aux_handle = 0; aux_handle < CONFIG_BT_CTLR_SCAN_AUX_SET;
aux_handle++) {
struct lll_scan_aux *aux_scan_lll;
struct ll_scan_set *aux_scan;
struct ll_scan_aux_set *aux;
aux = ull_scan_aux_set_get(aux_handle);
aux_scan_lll = aux->parent;
if (!aux_scan_lll) {
continue;
}
aux_scan = HDR_LLL2ULL(aux_scan_lll);
if (aux_scan == scan) {
err = ull_scan_aux_stop(aux);
if (err && (err != -EALREADY)) {
return BT_HCI_ERR_CMD_DISALLOWED;
}
}
}
#endif /* CONFIG_BT_CTLR_ADV_EXT */
return 0;
}

81
subsys/bluetooth/controller/ll_sw/ull_scan_aux.c
View File

@ -552,6 +552,14 @@ void ull_scan_aux_setup(memq_link_t *link, struct node_rx_hdr *rx)
/* Switching to ULL scheduling to receive auxiliary PDUs */
if (!IS_ENABLED(CONFIG_BT_CTLR_SYNC_PERIODIC) || lll) {
/* Do not ULL schedule if scan disable requested */
if (unlikely(scan->is_stop)) {
goto ull_scan_aux_rx_flush;
}
/* Remove auxiliary context association with scan context so
* that LLL can differentiate it to being ULL scheduling.
*/
lll->lll_aux = NULL;
} else {
struct ll_sync_set *sync;
@ -747,13 +755,36 @@ void ull_scan_aux_done(struct node_rx_event_done *done)
aux = HDR_LLL2ULL(sync->lll.lll_aux);
} else {
struct ll_scan_set *scan;
scan = HDR_LLL2ULL(aux->parent);
LL_ASSERT(ull_scan_is_valid_get(scan));
/* Auxiliary context will be flushed by ull_scan_aux_stop() */
if (unlikely(scan->is_stop)) {
return;
}
/* Setup the disabled callback to flush the auxiliary PDUs */
hdr = &aux->ull;
}
LL_ASSERT(!hdr->disabled_cb);
hdr->disabled_param = aux;
hdr->disabled_cb = done_disabled_cb;
if (ull_ref_get(hdr) == 0U) {
flush(aux);
} else {
LL_ASSERT(!hdr->disabled_cb);
hdr->disabled_param = aux;
hdr->disabled_cb = done_disabled_cb;
}
}
struct ll_scan_aux_set *ull_scan_aux_set_get(uint8_t handle)
{
if (handle >= CONFIG_BT_CTLR_SCAN_AUX_SET) {
return NULL;
}
return &ll_scan_aux_pool[handle];
}
uint8_t ull_scan_aux_lll_handle_get(struct lll_scan_aux *lll)
@ -856,7 +887,7 @@ void ull_scan_aux_release(memq_link_t *link, struct node_rx_hdr *rx)
scan = HDR_LLL2ULL(lll);
scan = ull_scan_is_valid_get(scan);
if (scan) {
is_stop = 0U;
is_stop = scan->is_stop;
} else {
struct lll_sync *sync_lll;
struct ll_sync_set *sync;
@ -926,15 +957,37 @@ int ull_scan_aux_stop(struct ll_scan_aux_set *aux)
/* Abort LLL event if ULL scheduling not used or already in prepare */
if (err == -EALREADY) {
ret = ull_disable(&aux->lll);
if (ret) {
return -EBUSY;
err = ull_disable(&aux->lll);
if (err) {
return err;
}
mfy.fp = flush;
} else if (!IS_ENABLED(CONFIG_BT_CTLR_SYNC_PERIODIC)) {
/* ULL scan auxiliary PDU reception scheduling stopped
* before prepare.
*/
mfy.fp = flush;
} else {
/* ULL scheduling stopped before prepare */
mfy.fp = aux_sync_incomplete;
struct ll_scan_set *scan;
struct lll_scan *lll;
lll = aux->parent;
scan = HDR_LLL2ULL(lll);
scan = ull_scan_is_valid_get(scan);
if (scan) {
/* ULL scan auxiliary PDU reception scheduling stopped
* before prepare.
*/
mfy.fp = flush;
} else {
/* ULL sync chain reception scheduling stopped before
* prepare.
*/
mfy.fp = aux_sync_incomplete;
}
}
/* Release auxiliary context in ULL execution context */
@ -963,6 +1016,16 @@ static inline struct ll_scan_aux_set *aux_acquire(void)
static inline void aux_release(struct ll_scan_aux_set *aux)
{
/* Debug check that parent was assigned when allocated for reception of
* auxiliary channel PDUs.
*/
LL_ASSERT(aux->parent);
/* Clear the parent so that when scan is being disabled then this
* auxiliary context shall not associate itself from being disable.
*/
aux->parent = NULL;
mem_release(aux, &scan_aux_free);
}

3
subsys/bluetooth/controller/ll_sw/ull_scan_internal.h
View File

@ -80,6 +80,9 @@ void ull_scan_aux_setup(memq_link_t *link, struct node_rx_hdr *rx);
/* Helper to clean up auxiliary channel scanning */
void ull_scan_aux_done(struct node_rx_event_done *done);
/* Return the scan aux set instance given the handle */
struct ll_scan_aux_set *ull_scan_aux_set_get(uint8_t handle);
/* Helper function to check and return if a valid aux scan context */
struct ll_scan_aux_set *ull_scan_aux_is_valid_get(struct ll_scan_aux_set *aux);

2
subsys/bluetooth/controller/ll_sw/ull_scan_types.h
View File

@ -11,6 +11,8 @@ struct ll_scan_set {
#if defined(CONFIG_BT_CTLR_ADV_EXT)
uint16_t duration_lazy;
struct node_rx_hdr *node_rx_scan_term;
uint8_t is_stop:1;
#endif /* CONFIG_BT_CTLR_ADV_EXT */
uint8_t is_enabled:1;