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lll_scan.c
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/*
* Copyright (c) 2018-2021 Nordic Semiconductor ASA
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <stdint.h>
#include <zephyr/toolchain.h>
#include <soc.h>
#include <zephyr/sys/byteorder.h>
#include <zephyr/bluetooth/hci.h>
#include "hal/cpu.h"
#include "hal/ccm.h"
#include "hal/radio.h"
#include "hal/ticker.h"
#include "util/util.h"
#include "util/memq.h"
#include "util/dbuf.h"
#include "util/mayfly.h"
#include "ticker/ticker.h"
#include "pdu.h"
#include "lll.h"
#include "lll_vendor.h"
#include "lll_clock.h"
#include "lll_df_types.h"
#include "lll_scan.h"
#include "lll_sync.h"
#include "lll_conn.h"
#include "lll_chan.h"
#include "lll_filter.h"
#include "lll_sched.h"
#include "lll_internal.h"
#include "lll_tim_internal.h"
#include "lll_prof_internal.h"
#include "lll_scan_internal.h"
#define BT_DBG_ENABLED IS_ENABLED(CONFIG_BT_DEBUG_HCI_DRIVER)
#define LOG_MODULE_NAME bt_ctlr_lll_scan
#include "common/log.h"
#include "hal/debug.h"
/* Maximum primary Advertising Radio Channels to scan */
#define ADV_CHAN_MAX 3U
#if defined(CONFIG_BT_CENTRAL) && defined(CONFIG_BT_CTLR_SCHED_ADVANCED)
#define CONN_SPACING CONFIG_BT_CTLR_SCHED_ADVANCED_CENTRAL_CONN_SPACING
#else
#define CONN_SPACING 0U
#endif /* CONFIG_BT_CENTRAL && CONFIG_BT_CTLR_SCHED_ADVANCED */
static int init_reset(void);
static int prepare_cb(struct lll_prepare_param *p);
static int resume_prepare_cb(struct lll_prepare_param *p);
static int common_prepare_cb(struct lll_prepare_param *p, bool is_resume);
static int is_abort_cb(void *next, void *curr,
lll_prepare_cb_t *resume_cb);
static void abort_cb(struct lll_prepare_param *prepare_param, void *param);
static void ticker_stop_cb(uint32_t ticks_at_expire, uint32_t ticks_drift,
uint32_t remainder, uint16_t lazy, uint8_t force,
void *param);
static void ticker_op_start_cb(uint32_t status, void *param);
static void isr_rx(void *param);
static void isr_tx(void *param);
static void isr_done(void *param);
static void isr_window(void *param);
#if defined(CONFIG_BT_CTLR_XTAL_ADVANCED) && \
(EVENT_OVERHEAD_PREEMPT_US <= EVENT_OVERHEAD_PREEMPT_MIN_US)
static void isr_abort(void *param);
#endif /* CONFIG_BT_CTLR_XTAL_ADVANCED &&
* (EVENT_OVERHEAD_PREEMPT_US <= EVENT_OVERHEAD_PREEMPT_MIN_US)
*/
static void isr_done_cleanup(void *param);
static inline int isr_rx_pdu(struct lll_scan *lll, struct pdu_adv *pdu_adv_rx,
uint8_t devmatch_ok, uint8_t devmatch_id,
uint8_t irkmatch_ok, uint8_t irkmatch_id,
uint8_t rl_idx, uint8_t rssi_ready,
uint8_t phy_flags_rx);
#if defined(CONFIG_BT_CENTRAL)
static inline bool isr_scan_init_check(const struct lll_scan *lll,
const struct pdu_adv *pdu,
uint8_t rl_idx);
#endif /* CONFIG_BT_CENTRAL */
static bool isr_scan_tgta_check(const struct lll_scan *lll, bool init,
uint8_t addr_type, const uint8_t *addr,
uint8_t rl_idx, bool *const dir_report);
static inline bool isr_scan_tgta_rpa_check(const struct lll_scan *lll,
uint8_t addr_type,
const uint8_t *addr,
bool *const dir_report);
static inline bool isr_scan_rsp_adva_matches(struct pdu_adv *srsp);
static int isr_rx_scan_report(struct lll_scan *lll, uint8_t devmatch_ok,
uint8_t irkmatch_ok, uint8_t rl_idx,
uint8_t rssi_ready, uint8_t phy_flags_rx,
bool dir_report);
int lll_scan_init(void)
{
int err;
err = init_reset();
if (err) {
return err;
}
return 0;
}
int lll_scan_reset(void)
{
int err;
err = init_reset();
if (err) {
return err;
}
return 0;
}
void lll_scan_prepare(void *param)
{
int err;
err = lll_hfclock_on();
LL_ASSERT(err >= 0);
err = lll_prepare(is_abort_cb, abort_cb, prepare_cb, 0, param);
LL_ASSERT(!err || err == -EINPROGRESS);
}
void lll_scan_isr_resume(void *param)
{
static struct lll_prepare_param p;
/* Clear radio status and events */
lll_isr_status_reset();
p.param = param;
resume_prepare_cb(&p);
}
bool lll_scan_isr_rx_check(const struct lll_scan *lll, uint8_t irkmatch_ok,
uint8_t devmatch_ok, uint8_t rl_idx)
{
#if defined(CONFIG_BT_CTLR_PRIVACY)
return (((lll->filter_policy & SCAN_FP_FILTER) == 0U) &&
(!devmatch_ok || ull_filter_lll_rl_idx_allowed(irkmatch_ok,
rl_idx))) ||
(((lll->filter_policy & SCAN_FP_FILTER) != 0U) &&
(devmatch_ok || ull_filter_lll_irk_in_fal(rl_idx)));
#else
return ((lll->filter_policy & SCAN_FP_FILTER) == 0U) ||
devmatch_ok;
#endif /* CONFIG_BT_CTLR_PRIVACY */
}
#if defined(CONFIG_BT_CENTRAL) || defined(CONFIG_BT_CTLR_ADV_EXT)
bool lll_scan_adva_check(const struct lll_scan *lll, uint8_t addr_type,
const uint8_t *addr, uint8_t rl_idx)
{
#if defined(CONFIG_BT_CTLR_PRIVACY)
/* Only applies to initiator with no filter accept list */
if (rl_idx != FILTER_IDX_NONE) {
return (rl_idx == lll->rl_idx);
} else if (!ull_filter_lll_rl_addr_allowed(addr_type, addr, &rl_idx)) {
return false;
}
#endif /* CONFIG_BT_CTLR_PRIVACY */
/* NOTE: This function to be used only to check AdvA when intiating,
* hence, otherwise we should not use the return value.
* This function is referenced in lll_scan_ext_tgta_check, but
* is not used when not being an initiator, hence return false
* is never reached.
*/
#if defined(CONFIG_BT_CENTRAL)
return ((lll->adv_addr_type == addr_type) &&
!memcmp(lll->adv_addr, addr, BDADDR_SIZE));
#else /* CONFIG_BT_CENTRAL */
return false;
#endif /* CONFIG_BT_CENTRAL */
}
#endif /* CONFIG_BT_CENTRAL || CONFIG_BT_CTLR_ADV_EXT */
#if defined(CONFIG_BT_CTLR_ADV_EXT)
bool lll_scan_ext_tgta_check(const struct lll_scan *lll, bool pri, bool is_init,
const struct pdu_adv *pdu, uint8_t rl_idx,
bool *const dir_report)
{
const uint8_t *adva;
const uint8_t *tgta;
uint8_t is_directed;
uint8_t tx_addr;
uint8_t rx_addr;
if (pri && !pdu->adv_ext_ind.ext_hdr.adv_addr) {
return true;
}
if (pdu->len <
PDU_AC_EXT_HEADER_SIZE_MIN + sizeof(struct pdu_adv_ext_hdr) +
ADVA_SIZE) {
return false;
}
is_directed = pdu->adv_ext_ind.ext_hdr.tgt_addr;
if (is_directed && (pdu->len < PDU_AC_EXT_HEADER_SIZE_MIN +
sizeof(struct pdu_adv_ext_hdr) +
ADVA_SIZE + TARGETA_SIZE)) {
return false;
}
tx_addr = pdu->tx_addr;
rx_addr = pdu->rx_addr;
adva = &pdu->adv_ext_ind.ext_hdr.data[ADVA_OFFSET];
tgta = &pdu->adv_ext_ind.ext_hdr.data[TGTA_OFFSET];
return ((!is_init ||
((lll->filter_policy & SCAN_FP_FILTER) != 0U) ||
lll_scan_adva_check(lll, tx_addr, adva, rl_idx)) &&
((!is_directed) ||
(is_directed &&
isr_scan_tgta_check(lll, is_init, rx_addr, tgta, rl_idx,
dir_report))));
}
#endif /* CONFIG_BT_CTLR_ADV_EXT */
#if defined(CONFIG_BT_CENTRAL)
void lll_scan_prepare_connect_req(struct lll_scan *lll, struct pdu_adv *pdu_tx,
uint8_t phy, uint8_t adv_tx_addr,
uint8_t *adv_addr, uint8_t init_tx_addr,
uint8_t *init_addr, uint32_t *conn_space_us)
{
struct lll_conn *lll_conn;
uint32_t conn_interval_us;
uint32_t conn_offset_us;
lll_conn = lll->conn;
/* Note: this code is also valid for AUX_CONNECT_REQ */
pdu_tx->type = PDU_ADV_TYPE_CONNECT_IND;
if (IS_ENABLED(CONFIG_BT_CTLR_CHAN_SEL_2)) {
pdu_tx->chan_sel = 1;
} else {
pdu_tx->chan_sel = 0;
}
pdu_tx->tx_addr = init_tx_addr;
pdu_tx->rx_addr = adv_tx_addr;
pdu_tx->len = sizeof(struct pdu_adv_connect_ind);
memcpy(&pdu_tx->connect_ind.init_addr[0], init_addr, BDADDR_SIZE);
memcpy(&pdu_tx->connect_ind.adv_addr[0], adv_addr, BDADDR_SIZE);
memcpy(&pdu_tx->connect_ind.access_addr[0],
&lll_conn->access_addr[0], 4);
memcpy(&pdu_tx->connect_ind.crc_init[0], &lll_conn->crc_init[0], 3);
pdu_tx->connect_ind.win_size = 1;
conn_interval_us = (uint32_t)lll_conn->interval * CONN_INT_UNIT_US;
conn_offset_us = radio_tmr_end_get() + EVENT_IFS_US +
PDU_AC_MAX_US(sizeof(struct pdu_adv_connect_ind),
(phy == PHY_LEGACY) ? PHY_1M : phy);
/* Add transmitWindowDelay to default calculated connection offset:
* 1.25ms for a legacy PDU, 2.5ms for an LE Uncoded PHY and 3.75ms for
* an LE Coded PHY.
*/
if (0) {
#if defined(CONFIG_BT_CTLR_ADV_EXT)
} else if (phy) {
if (phy & PHY_CODED) {
conn_offset_us += WIN_DELAY_CODED;
} else {
conn_offset_us += WIN_DELAY_UNCODED;
}
#endif
} else {
conn_offset_us += WIN_DELAY_LEGACY;
}
if (!IS_ENABLED(CONFIG_BT_CTLR_SCHED_ADVANCED) ||
lll->conn_win_offset_us == 0U) {
*conn_space_us = conn_offset_us;
pdu_tx->connect_ind.win_offset = sys_cpu_to_le16(0);
} else {
uint32_t win_offset_us = lll->conn_win_offset_us +
CONN_SPACING;
while ((win_offset_us & ((uint32_t)1 << 31)) ||
(win_offset_us < conn_offset_us)) {
win_offset_us += conn_interval_us;
}
*conn_space_us = win_offset_us;
pdu_tx->connect_ind.win_offset =
sys_cpu_to_le16((win_offset_us - conn_offset_us) /
CONN_INT_UNIT_US);
pdu_tx->connect_ind.win_size++;
}
pdu_tx->connect_ind.interval = sys_cpu_to_le16(lll_conn->interval);
pdu_tx->connect_ind.latency = sys_cpu_to_le16(lll_conn->latency);
pdu_tx->connect_ind.timeout = sys_cpu_to_le16(lll->conn_timeout);
memcpy(&pdu_tx->connect_ind.chan_map[0], &lll_conn->data_chan_map[0],
sizeof(pdu_tx->connect_ind.chan_map));
pdu_tx->connect_ind.hop = lll_conn->data_chan_hop;
pdu_tx->connect_ind.sca = lll_clock_sca_local_get();
}
#endif /* CONFIG_BT_CENTRAL */
static int init_reset(void)
{
return 0;
}
static int prepare_cb(struct lll_prepare_param *p)
{
return common_prepare_cb(p, false);
}
static int resume_prepare_cb(struct lll_prepare_param *p)
{
struct ull_hdr *ull;
ull = HDR_LLL2ULL(p->param);
p->ticks_at_expire = ticker_ticks_now_get() - lll_event_offset_get(ull);
p->remainder = 0;
p->lazy = 0;
return common_prepare_cb(p, true);
}
static int common_prepare_cb(struct lll_prepare_param *p, bool is_resume)
{
uint32_t ticks_at_event, ticks_at_start;
struct node_rx_pdu *node_rx;
uint32_t remainder_us;
struct lll_scan *lll;
struct ull_hdr *ull;
uint32_t remainder;
uint32_t aa;
DEBUG_RADIO_START_O(1);
lll = p->param;
#if defined(CONFIG_BT_CENTRAL)
/* Check if stopped (on connection establishment race between LLL and
* ULL.
*/
if (unlikely(lll->is_stop ||
(lll->conn &&
(lll->conn->central.initiated ||
lll->conn->central.cancelled)))) {
radio_isr_set(lll_isr_early_abort, lll);
radio_disable();
return 0;
}
#endif /* CONFIG_BT_CENTRAL */
/* Initialize scanning state */
lll->state = 0U;
radio_reset();
#if defined(CONFIG_BT_CTLR_TX_PWR_DYNAMIC_CONTROL)
radio_tx_power_set(lll->tx_pwr_lvl);
#else
radio_tx_power_set(RADIO_TXP_DEFAULT);
#endif
#if defined(CONFIG_BT_CTLR_ADV_EXT)
/* TODO: if coded we use S8? */
radio_phy_set(lll->phy, PHY_FLAGS_S8);
radio_pkt_configure(RADIO_PKT_CONF_LENGTH_8BIT, PDU_AC_LEG_PAYLOAD_SIZE_MAX,
RADIO_PKT_CONF_PHY(lll->phy));
lll->is_adv_ind = 0U;
lll->is_aux_sched = 0U;
#else /* !CONFIG_BT_CTLR_ADV_EXT */
radio_phy_set(0, 0);
radio_pkt_configure(RADIO_PKT_CONF_LENGTH_8BIT, PDU_AC_LEG_PAYLOAD_SIZE_MAX,
RADIO_PKT_CONF_PHY(RADIO_PKT_CONF_PHY_LEGACY));
#endif /* !CONFIG_BT_CTLR_ADV_EXT */
node_rx = ull_pdu_rx_alloc_peek(1);
LL_ASSERT(node_rx);
radio_pkt_rx_set(node_rx->pdu);
aa = sys_cpu_to_le32(PDU_AC_ACCESS_ADDR);
radio_aa_set((uint8_t *)&aa);
radio_crc_configure(PDU_CRC_POLYNOMIAL,
PDU_AC_CRC_IV);
lll_chan_set(37 + lll->chan);
radio_isr_set(isr_rx, lll);
/* setup tIFS switching */
if (0) {
} else if (lll->type ||
#if defined(CONFIG_BT_CENTRAL)
lll->conn) {
#else /* !CONFIG_BT_CENTRAL */
0) {
#endif /* !CONFIG_BT_CENTRAL */
radio_tmr_tifs_set(EVENT_IFS_US);
radio_switch_complete_and_tx(0, 0, 0, 0);
} else {
radio_switch_complete_and_disable();
}
#if defined(CONFIG_BT_CTLR_PRIVACY)
if (ull_filter_lll_rl_enabled()) {
struct lll_filter *filter =
ull_filter_lll_get((lll->filter_policy &
SCAN_FP_FILTER) != 0U);
uint8_t count, *irks = ull_filter_lll_irks_get(&count);
radio_filter_configure(filter->enable_bitmask,
filter->addr_type_bitmask,
(uint8_t *)filter->bdaddr);
#if defined(CONFIG_BT_CTLR_ADV_EXT)
radio_ar_configure(count, irks, (lll->phy << 2));
#else
radio_ar_configure(count, irks, 0);
#endif
} else
#endif /* CONFIG_BT_CTLR_PRIVACY */
if (IS_ENABLED(CONFIG_BT_CTLR_FILTER_ACCEPT_LIST) && lll->filter_policy) {
/* Setup Radio Filter */
struct lll_filter *fal = ull_filter_lll_get(true);
radio_filter_configure(fal->enable_bitmask,
fal->addr_type_bitmask,
(uint8_t *)fal->bdaddr);
}
ticks_at_event = p->ticks_at_expire;
ull = HDR_LLL2ULL(lll);
ticks_at_event += lll_event_offset_get(ull);
ticks_at_start = ticks_at_event;
ticks_at_start += HAL_TICKER_US_TO_TICKS(EVENT_OVERHEAD_START_US);
remainder = p->remainder;
remainder_us = radio_tmr_start(0, ticks_at_start, remainder);
/* capture end of Rx-ed PDU, for initiator to calculate first
* central event or extended scan to schedule auxiliary channel
* reception.
*/
radio_tmr_end_capture();
/* scanner always measures RSSI */
radio_rssi_measure();
#if defined(HAL_RADIO_GPIO_HAVE_LNA_PIN)
radio_gpio_lna_setup();
radio_gpio_pa_lna_enable(remainder_us +
radio_rx_ready_delay_get(0, 0) -
HAL_RADIO_GPIO_LNA_OFFSET);
#else /* !HAL_RADIO_GPIO_HAVE_LNA_PIN */
ARG_UNUSED(remainder_us);
#endif /* !HAL_RADIO_GPIO_HAVE_LNA_PIN */
#if defined(CONFIG_BT_CTLR_XTAL_ADVANCED) && \
(EVENT_OVERHEAD_PREEMPT_US <= EVENT_OVERHEAD_PREEMPT_MIN_US)
/* check if preempt to start has changed */
if (lll_preempt_calc(ull, (TICKER_ID_SCAN_BASE +
ull_scan_lll_handle_get(lll)),
ticks_at_event)) {
radio_isr_set(isr_abort, lll);
radio_disable();
} else
#endif /* CONFIG_BT_CTLR_XTAL_ADVANCED &&
* (EVENT_OVERHEAD_PREEMPT_US <= EVENT_OVERHEAD_PREEMPT_MIN_US)
*/
{
uint32_t ret;
if (!is_resume && lll->ticks_window) {
/* start window close timeout */
ret = ticker_start(TICKER_INSTANCE_ID_CTLR,
TICKER_USER_ID_LLL,
TICKER_ID_SCAN_STOP,
ticks_at_event, lll->ticks_window,
TICKER_NULL_PERIOD,
TICKER_NULL_REMAINDER,
TICKER_NULL_LAZY, TICKER_NULL_SLOT,
ticker_stop_cb, lll,
ticker_op_start_cb,
(void *)__LINE__);
LL_ASSERT((ret == TICKER_STATUS_SUCCESS) ||
(ret == TICKER_STATUS_BUSY));
}
#if defined(CONFIG_BT_CENTRAL) && defined(CONFIG_BT_CTLR_SCHED_ADVANCED)
/* calc next group in us for the anchor where first connection
* event to be placed.
*/
if (lll->conn) {
static memq_link_t link;
static struct mayfly mfy_after_cen_offset_get = {
0, 0, &link, NULL,
ull_sched_mfy_after_cen_offset_get};
uint32_t retval;
mfy_after_cen_offset_get.param = p;
retval = mayfly_enqueue(TICKER_USER_ID_LLL,
TICKER_USER_ID_ULL_LOW, 1,
&mfy_after_cen_offset_get);
LL_ASSERT(!retval);
}
#endif /* CONFIG_BT_CENTRAL && CONFIG_BT_CTLR_SCHED_ADVANCED */
ret = lll_prepare_done(lll);
LL_ASSERT(!ret);
}
DEBUG_RADIO_START_O(1);
return 0;
}
static int is_abort_cb(void *next, void *curr, lll_prepare_cb_t *resume_cb)
{
struct lll_scan *lll = curr;
#if defined(CONFIG_BT_CENTRAL)
/* Irrespective of same state/role (initiator radio event) or different
* state/role (example, advertising radio event) that overlaps the
* initiator, if a CONNECT_REQ PDU has been enqueued for transmission
* then initiator shall not abort.
*/
if (lll->conn && lll->conn->central.initiated) {
/* Connection Establishment initiated, do not abort */
return 0;
}
#endif /* CONFIG_BT_CENTRAL */
/* Check if pre-emption by a different state/role radio event */
if (next != curr) {
#if defined(CONFIG_BT_CTLR_ADV_EXT)
/* Resume not to be used if duration being used */
if (unlikely(!lll->duration_reload || lll->duration_expire))
#endif /* CONFIG_BT_CTLR_ADV_EXT */
{
/* Put back to resume state for continuous scanning */
if (!lll->ticks_window) {
int err;
/* Set the resume prepare function to use for
* resumption after the pre-emptor is done.
*/
*resume_cb = resume_prepare_cb;
/* Retain HF clock */
err = lll_hfclock_on();
LL_ASSERT(err >= 0);
/* Yield to the pre-emptor, but be
* resumed thereafter.
*/
return -EAGAIN;
}
/* Yield to the pre-emptor */
return -ECANCELED;
}
}
if (0) {
#if defined(CONFIG_BT_CTLR_ADV_EXT)
} else if (unlikely(lll->duration_reload && !lll->duration_expire)) {
/* Duration expired, do not continue, close and generate
* done event.
*/
radio_isr_set(isr_done_cleanup, lll);
} else if (lll->state || lll->is_aux_sched) {
/* Do not abort scan response reception or LLL scheduled
* auxiliary PDU scan.
*/
return 0;
#endif /* CONFIG_BT_CTLR_ADV_EXT */
} else {
/* Switch scan window to next radio channel */
radio_isr_set(isr_window, lll);
}
radio_disable();
return 0;
}
static void abort_cb(struct lll_prepare_param *prepare_param, void *param)
{
#if defined(CONFIG_BT_CENTRAL)
struct lll_scan *lll = param;
#endif /* CONFIG_BT_CENTRAL */
int err;
/* NOTE: This is not a prepare being cancelled */
if (!prepare_param) {
/* Perform event abort here.
* After event has been cleanly aborted, clean up resources
* and dispatch event done.
*/
if (0) {
#if defined(CONFIG_BT_CENTRAL)
} else if (IS_ENABLED(CONFIG_BT_CTLR_LOW_LAT) &&
lll->conn && lll->conn->central.initiated) {
while (!radio_has_disabled()) {
cpu_sleep();
}
#endif /* CONFIG_BT_CENTRAL */
} else {
radio_isr_set(isr_done_cleanup, param);
radio_disable();
}
return;
}
/* NOTE: Else clean the top half preparations of the aborted event
* currently in preparation pipeline.
*/
err = lll_hfclock_off();
LL_ASSERT(err >= 0);
lll_done(param);
}
static void ticker_stop_cb(uint32_t ticks_at_expire, uint32_t ticks_drift,
uint32_t remainder, uint16_t lazy, uint8_t force,
void *param)
{
static memq_link_t link;
static struct mayfly mfy = {0, 0, &link, NULL, lll_disable};
uint32_t ret;
mfy.param = param;
ret = mayfly_enqueue(TICKER_USER_ID_ULL_HIGH, TICKER_USER_ID_LLL, 0,
&mfy);
LL_ASSERT(!ret);
}
static void ticker_op_start_cb(uint32_t status, void *param)
{
ARG_UNUSED(param);
LL_ASSERT(status == TICKER_STATUS_SUCCESS);
}
static void isr_rx(void *param)
{
struct node_rx_pdu *node_rx;
uint8_t phy_flags_rx;
struct lll_scan *lll;
struct pdu_adv *pdu;
uint8_t devmatch_ok;
uint8_t devmatch_id;
uint8_t irkmatch_ok;
uint8_t irkmatch_id;
uint8_t rssi_ready;
uint8_t trx_done;
uint8_t crc_ok;
uint8_t rl_idx;
bool has_adva;
int err;
if (IS_ENABLED(CONFIG_BT_CTLR_PROFILE_ISR)) {
lll_prof_latency_capture();
}
/* Read radio status and events */
trx_done = radio_is_done();
if (trx_done) {
crc_ok = radio_crc_is_valid();
devmatch_ok = radio_filter_has_match();
devmatch_id = radio_filter_match_get();
if (IS_ENABLED(CONFIG_BT_CTLR_PRIVACY)) {
irkmatch_ok = radio_ar_has_match();
irkmatch_id = radio_ar_match_get();
} else {
irkmatch_ok = 0U;
irkmatch_id = FILTER_IDX_NONE;
}
rssi_ready = radio_rssi_is_ready();
phy_flags_rx = radio_phy_flags_rx_get();
} else {
crc_ok = devmatch_ok = irkmatch_ok = rssi_ready =
phy_flags_rx = 0U;
devmatch_id = irkmatch_id = FILTER_IDX_NONE;
}
/* Clear radio status and events */
lll_isr_status_reset();
lll = param;
/* No Rx */
if (!trx_done || !crc_ok) {
goto isr_rx_do_close;
}
node_rx = ull_pdu_rx_alloc_peek(1);
LL_ASSERT(node_rx);
pdu = (void *)node_rx->pdu;
if (0) {
#if defined(CONFIG_BT_CTLR_ADV_EXT)
} else if (pdu->type == PDU_ADV_TYPE_EXT_IND) {
has_adva = lll_scan_aux_addr_match_get(lll, pdu,
&devmatch_ok,
&devmatch_id,
&irkmatch_ok,
&irkmatch_id);
#endif /* !CONFIG_BT_CTLR_ADV_EXT */
} else {
has_adva = true;
}
#if defined(CONFIG_BT_CTLR_PRIVACY)
rl_idx = devmatch_ok ?
ull_filter_lll_rl_idx(((lll->filter_policy &
SCAN_FP_FILTER) != 0U),
devmatch_id) :
irkmatch_ok ? ull_filter_lll_rl_irk_idx(irkmatch_id) :
FILTER_IDX_NONE;
#else
rl_idx = FILTER_IDX_NONE;
#endif /* CONFIG_BT_CTLR_PRIVACY */
if (has_adva) {
bool allow;
allow = lll_scan_isr_rx_check(lll, irkmatch_ok, devmatch_ok,
rl_idx);
if (false) {
#if defined(CONFIG_BT_CTLR_SYNC_PERIODIC) && \
defined(CONFIG_BT_CTLR_FILTER_ACCEPT_LIST)
} else if (allow || lll->is_sync) {
devmatch_ok = allow ? 1U : 0U;
#endif /* CONFIG_BT_CTLR_SYNC_PERIODIC && CONFIG_BT_CTLR_FILTER_ACCEPT_LIST */
} else if (!allow) {
goto isr_rx_do_close;
}
}
err = isr_rx_pdu(lll, pdu, devmatch_ok, devmatch_id, irkmatch_ok,
irkmatch_id, rl_idx, rssi_ready, phy_flags_rx);
if (!err) {
if (IS_ENABLED(CONFIG_BT_CTLR_PROFILE_ISR)) {
lll_prof_send();
}
return;
}
isr_rx_do_close:
radio_isr_set(isr_done, lll);
radio_disable();
}
static void isr_tx(void *param)
{
#if defined(CONFIG_BT_CTLR_PRIVACY) && defined(CONFIG_BT_CTLR_ADV_EXT)
struct lll_scan *lll = param;
#endif
struct node_rx_pdu *node_rx;
uint32_t hcto;
/* Clear radio status and events */
lll_isr_tx_status_reset();
/* Complete currently setup Rx and disable radio */
radio_switch_complete_and_disable();
node_rx = ull_pdu_rx_alloc_peek(1);
LL_ASSERT(node_rx);
radio_pkt_rx_set(node_rx->pdu);
/* assert if radio packet ptr is not set and radio started rx */
LL_ASSERT(!radio_is_ready());
#if defined(CONFIG_BT_CTLR_PRIVACY)
if (ull_filter_lll_rl_enabled()) {
uint8_t count, *irks = ull_filter_lll_irks_get(&count);
#if defined(CONFIG_BT_CTLR_ADV_EXT)
radio_ar_configure(count, irks, (lll->phy << 2));
#else
radio_ar_configure(count, irks, 0);
#endif
}
#endif /* CONFIG_BT_CTLR_PRIVACY */
/* +/- 2us active clock jitter, +1 us hcto compensation */
hcto = radio_tmr_tifs_base_get() + EVENT_IFS_US + 4 + 1;
hcto += radio_rx_chain_delay_get(0, 0);
hcto += addr_us_get(0);
hcto -= radio_tx_chain_delay_get(0, 0);
radio_tmr_hcto_configure(hcto);
radio_rssi_measure();
#if defined(HAL_RADIO_GPIO_HAVE_LNA_PIN)
radio_gpio_lna_setup();
radio_gpio_pa_lna_enable(radio_tmr_tifs_base_get() + EVENT_IFS_US - 4 -
radio_tx_chain_delay_get(0, 0) -
HAL_RADIO_GPIO_LNA_OFFSET);
#endif /* HAL_RADIO_GPIO_HAVE_LNA_PIN */
radio_isr_set(isr_rx, param);
}
static void isr_common_done(void *param)
{
struct node_rx_pdu *node_rx;
struct lll_scan *lll;
/* Clear radio status and events */
lll_isr_status_reset();
/* Reset scanning state */
lll = param;
lll->state = 0U;
#if defined(CONFIG_BT_CTLR_ADV_EXT)
lll->is_adv_ind = 0U;
#endif /* CONFIG_BT_CTLR_ADV_EXT */
/* setup tIFS switching */
if (0) {
/* TODO: Add Rx-Rx switch usecase improvement in the future */
} else if (lll->type ||
#if defined(CONFIG_BT_CENTRAL)
lll->conn) {
#else /* !CONFIG_BT_CENTRAL */
0) {
#endif /* !CONFIG_BT_CENTRAL */
radio_tmr_tifs_set(EVENT_IFS_US);
radio_switch_complete_and_tx(0, 0, 0, 0);
} else {
radio_switch_complete_and_disable();
}
node_rx = ull_pdu_rx_alloc_peek(1);
LL_ASSERT(node_rx);
radio_pkt_rx_set(node_rx->pdu);
#if defined(CONFIG_BT_CTLR_PRIVACY)
if (ull_filter_lll_rl_enabled()) {
uint8_t count, *irks = ull_filter_lll_irks_get(&count);
#if defined(CONFIG_BT_CTLR_ADV_EXT)
radio_ar_configure(count, irks, (lll->phy << 2));
#else
ARG_UNUSED(lll);
radio_ar_configure(count, irks, 0);
#endif
}
#endif /* CONFIG_BT_CTLR_PRIVACY */
radio_rssi_measure();
radio_isr_set(isr_rx, param);
}
static void isr_done(void *param)
{
isr_common_done(param);
#if defined(HAL_RADIO_GPIO_HAVE_LNA_PIN)
uint32_t start_us = radio_tmr_start_now(0);
radio_gpio_lna_setup();
radio_gpio_pa_lna_enable(start_us +
radio_rx_ready_delay_get(0, 0) -
HAL_RADIO_GPIO_LNA_OFFSET);
#else /* !HAL_RADIO_GPIO_HAVE_LNA_PIN */
radio_rx_enable();
#endif /* !HAL_RADIO_GPIO_HAVE_LNA_PIN */
/* capture end of Rx-ed PDU, for initiator to calculate first
* central event.
*/
radio_tmr_end_capture();
}
static void isr_window(void *param)
{
uint32_t remainder_us;
struct lll_scan *lll;
isr_common_done(param);
lll = param;
/* Next radio channel to scan, round-robin 37, 38, and 39. */
if (++lll->chan == ADV_CHAN_MAX) {
lll->chan = 0U;
}
lll_chan_set(37 + lll->chan);
#if defined(CONFIG_BT_CENTRAL)
bool is_sched_advanced = IS_ENABLED(CONFIG_BT_CTLR_SCHED_ADVANCED) &&
lll->conn && lll->conn_win_offset_us;
uint32_t ticks_anchor_prev;
uint32_t ticks_at_start;
if (is_sched_advanced) {
/* Get the ticks_anchor when the offset to free time space for
* a new central event was last calculated at the start of the
* initiator window. This can be either the previous full window
* start or remainder resume start of the continuous initiator
* after it was preempted.
*/
ticks_anchor_prev = radio_tmr_start_get();
} else {
ticks_anchor_prev = 0U;
}
ticks_at_start = ticker_ticks_now_get() +
HAL_TICKER_CNTR_CMP_OFFSET_MIN;
remainder_us = radio_tmr_start_tick(0, ticks_at_start);
#else /* !CONFIG_BT_CENTRAL */
remainder_us = radio_tmr_start_now(0);
#endif /* !CONFIG_BT_CENTRAL */
/* capture end of Rx-ed PDU, for initiator to calculate first
* central event.
*/
radio_tmr_end_capture();
#if defined(HAL_RADIO_GPIO_HAVE_LNA_PIN)
radio_gpio_lna_setup();
radio_gpio_pa_lna_enable(remainder_us +
radio_rx_ready_delay_get(0, 0) -
HAL_RADIO_GPIO_LNA_OFFSET);
#else /* !HAL_RADIO_GPIO_HAVE_LNA_PIN */
ARG_UNUSED(remainder_us);
#endif /* !HAL_RADIO_GPIO_HAVE_LNA_PIN */
#if defined(CONFIG_BT_CENTRAL)
if (is_sched_advanced) {
uint32_t ticks_anchor_new, ticks_delta, ticks_delta_us;
/* Calculation to reduce the conn_win_offset_us, as a new
* window is started here and the reference ticks_anchor is
* now at the start of this new window.
*/
ticks_anchor_new = radio_tmr_start_get();
ticks_delta = ticker_ticks_diff_get(ticks_anchor_new,
ticks_anchor_prev);
ticks_delta_us = HAL_TICKER_TICKS_TO_US(ticks_delta);
/* Underflow is accepted, as it will be corrected at the time of
* connection establishment by incrementing it in connection
* interval units until it is in the future.
*/
lll->conn_win_offset_us -= ticks_delta_us;
}
#endif /* CONFIG_BT_CENTRAL */
}
#if defined(CONFIG_BT_CTLR_XTAL_ADVANCED) && \
(EVENT_OVERHEAD_PREEMPT_US <= EVENT_OVERHEAD_PREEMPT_MIN_US)
static void isr_abort(void *param)
{
/* Clear radio status and events */
lll_isr_status_reset();
/* Disable Rx filters when aborting scan prepare */
radio_filter_disable();
#if defined(CONFIG_BT_CTLR_ADV_EXT)
struct event_done_extra *extra;
/* Generate Scan done events so that duration and max expiry is
* detected in ULL.
*/