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TSCH: some rework on tsch-queue

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This commit is contained in:
Simon Duquennoy 2017-06-27 10:22:40 +02:00
parent bf5bea583e
commit c297c89f8d
3 changed files with 48 additions and 46 deletions
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43
core/net/mac/tsch/tsch-queue.c
View File

@ -313,6 +313,49 @@ tsch_queue_free_packet(struct tsch_packet *p)
}
}
/*---------------------------------------------------------------------------*/
/* Updates neighbor queue state after a transmission */
int
tsch_queue_packet_sent(struct tsch_neighbor *n, struct tsch_packet *p,
struct tsch_link *link, uint8_t mac_tx_status)
{
int in_queue = 1;
int is_shared_link = link->link_options & LINK_OPTION_SHARED;
int is_unicast = !n->is_broadcast;
if(mac_tx_status == MAC_TX_OK) {
/* Successful transmission */
tsch_queue_remove_packet_from_queue(n);
in_queue = 0;
/* Update CSMA state in the unicast case */
if(is_unicast) {
if(is_shared_link || tsch_queue_is_empty(n)) {
/* If this is a shared link, reset backoff on success.
* Otherwise, do so only is the queue is empty */
tsch_queue_backoff_reset(n);
}
}
} else {
/* Failed transmission */
if(p->transmissions >= TSCH_MAC_MAX_FRAME_RETRIES + 1) {
/* Drop packet */
tsch_queue_remove_packet_from_queue(n);
in_queue = 0;
}
/* Update CSMA state in the unicast case */
if(is_unicast) {
/* Failures on dedicated (== non-shared) leave the backoff
* window nor exponent unchanged */
if(is_shared_link) {
/* Shared link: increment backoff exponent, pick a new window */
tsch_queue_backoff_inc(n);
}
}
}
return in_queue;
}
/*---------------------------------------------------------------------------*/
/* Flush all neighbor queues */
void
tsch_queue_reset(void)

4
core/net/mac/tsch/tsch-queue.h
View File

@ -94,7 +94,7 @@
#ifdef TSCH_CONF_MAC_MAX_FRAME_RETRIES
#define TSCH_MAC_MAX_FRAME_RETRIES TSCH_CONF_MAC_MAX_FRAME_RETRIES
#else
#define TSCH_MAC_MAX_FRAME_RETRIES 8
#define TSCH_MAC_MAX_FRAME_RETRIES 7
#endif
/*********** Callbacks *********/
@ -169,6 +169,8 @@ int tsch_queue_packet_count(const linkaddr_t *addr);
struct tsch_packet *tsch_queue_remove_packet_from_queue(struct tsch_neighbor *n);
/* Free a packet */
void tsch_queue_free_packet(struct tsch_packet *p);
/* Updates neighbor queue state after a transmission */
int tsch_queue_packet_sent(struct tsch_neighbor *n, struct tsch_packet *p, struct tsch_link *link, uint8_t mac_tx_status);
/* Reset neighbor queues */
void tsch_queue_reset(void);
/* Deallocate neighbors with empty queue */

47
core/net/mac/tsch/tsch-slot-operation.c
View File

@ -349,49 +349,6 @@ get_packet_and_neighbor_for_link(struct tsch_link *link, struct tsch_neighbor **
return p;
}
/*---------------------------------------------------------------------------*/
/* Post TX: Update neighbor state after a transmission */
static int
update_neighbor_state(struct tsch_neighbor *n, struct tsch_packet *p,
struct tsch_link *link, uint8_t mac_tx_status)
{
int in_queue = 1;
int is_shared_link = link->link_options & LINK_OPTION_SHARED;
int is_unicast = !n->is_broadcast;
if(mac_tx_status == MAC_TX_OK) {
/* Successful transmission */
tsch_queue_remove_packet_from_queue(n);
in_queue = 0;
/* Update CSMA state in the unicast case */
if(is_unicast) {
if(is_shared_link || tsch_queue_is_empty(n)) {
/* If this is a shared link, reset backoff on success.
* Otherwise, do so only is the queue is empty */
tsch_queue_backoff_reset(n);
}
}
} else {
/* Failed transmission */
if(p->transmissions >= TSCH_MAC_MAX_FRAME_RETRIES + 1) {
/* Drop packet */
tsch_queue_remove_packet_from_queue(n);
in_queue = 0;
}
/* Update CSMA state in the unicast case */
if(is_unicast) {
/* Failures on dedicated (== non-shared) leave the backoff
* window nor exponent unchanged */
if(is_shared_link) {
/* Shared link: increment backoff exponent, pick a new window */
tsch_queue_backoff_inc(n);
}
}
}
return in_queue;
}
/*---------------------------------------------------------------------------*/
/**
* This function turns on the radio. Its semantics is dependent on
* the value of TSCH_RADIO_ON_DURING_TIMESLOT constant:
@ -678,8 +635,8 @@ PT_THREAD(tsch_tx_slot(struct pt *pt, struct rtimer *t))
current_packet->transmissions++;
current_packet->ret = mac_tx_status;
/* Post TX: Update neighbor state */
in_queue = update_neighbor_state(current_neighbor, current_packet, current_link, mac_tx_status);
/* Post TX: Update neighbor queue state */
in_queue = tsch_queue_packet_sent(current_neighbor, current_packet, current_link, mac_tx_status);
/* The packet was dequeued, add it to dequeued_ringbuf for later processing */
if(in_queue == 0) {