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bluetooth: controller: Document RX path flow from mayfly to HCI

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No functional change expected.

Signed-off-by: Mark Ruvald Pedersen <mped@oticon.com>
This commit is contained in:
Mark Ruvald Pedersen 2019-02-15 09:38:19 +01:00 • committed by Anas Nashif
commit 10d3f070e6
1 changed files with 23 additions and 1 deletions
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24
subsys/bluetooth/controller/hci/hci_driver.c
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@ -70,6 +70,11 @@ static sys_slist_t hbuf_pend;
static s32_t hbuf_count;
#endif
/**
* @brief Pull from memq_ll_rx and push up to Host thread recv_thread()
* via recv_fifo
* @details Execution context: Controller thread
*/
static void prio_recv_thread(void *p1, void *p2, void *p3)
{
while (1) {
@ -77,6 +82,7 @@ static void prio_recv_thread(void *p1, void *p2, void *p3)
u8_t num_cmplt;
u16_t handle;
/* While there are completed rx nodes */
while ((num_cmplt = ll_rx_get(&node_rx, &handle))) {
#if defined(CONFIG_BT_CONN)
struct net_buf *buf;
@ -90,17 +96,29 @@ static void prio_recv_thread(void *p1, void *p2, void *p3)
}
if (node_rx) {
/* Until now we've only peeked, now we really do
* the handover
*/
ll_rx_dequeue();
/* Send the rx node up to Host thread, recv_thread() */
BT_DBG("RX node enqueue");
k_fifo_put(&recv_fifo, node_rx);
/* There may still be completed nodes, continue
* pushing all those up to Host before waiting for
* ULL mayfly
*/
continue;
}
BT_DBG("sem take...");
/* Wait until ULL mayfly has something to give us.
* Blocking-take of the semaphore; we take it once ULL mayfly
* has let it go in ll_rx_sched().
*/
k_sem_take(&sem_prio_recv, K_FOREVER);
/* Now, ULL mayfly has something to give to us */
BT_DBG("sem taken");
#if defined(CONFIG_INIT_STACKS)
@ -283,6 +301,10 @@ static inline struct net_buf *process_hbuf(struct node_rx_pdu *n)
}
#endif
/**
* @brief Blockingly pull from Controller thread's recv_fifo
* @details Execution context: Host thread
*/
static void recv_thread(void *p1, void *p2, void *p3)
{
#if defined(CONFIG_BT_HCI_ACL_FLOW_CONTROL)