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net: tc: Proper packet priority to traffic class mapping

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The IEEE 802.1Q chapter I.3 contains a proper network packet
priority to traffic class mapping. The original mapping was
clearly incorrect.

Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
This commit is contained in:
Jukka Rissanen 2018-04-27 17:40:59 +03:00
parent f038d35a98
commit af8a0b1a5d
1 changed files with 24 additions and 26 deletions
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50
subsys/net/ip/net_tc.c
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@ -46,21 +46,20 @@ void net_tc_submit_to_rx_queue(u8_t tc, struct net_pkt *pkt)
int net_tx_priority2tc(enum net_priority prio)
{
/* FIXME: Initial implementation just maps the priority to certain
* traffic class to certain queue. This needs to be made more generic.
*
/*
* Use the example priority -> traffic class mapper found in
* IEEE 802.1Q chapter 8.6.6 table 8.4 and chapter 34.5 table 34-1
* IEEE 802.1Q chapter I.3, chapter 8.6.6 table 8.4 and
* chapter 34.5 table 34-1
*
* Priority Acronym Traffic types
* 0 (lowest) BK Background
* 1 (default) BE Best effort
* 2 EE Excellent effort
* 3 (highest) CA Critical applications
* 3 CA Critical applications
* 4 VI Video, < 100 ms latency and jitter
* 5 VO Voice, < 10 ms latency and jitter
* 6 IC Internetwork control
* 7 NC Network control
* 7 (highest) NC Network control
*/
/* Priority is the index to this array */
static const u8_t tc[] = {
@ -68,25 +67,25 @@ int net_tx_priority2tc(enum net_priority prio)
0, 0, 0, 0, 0, 0, 0, 0
#endif
#if NET_TC_TX_COUNT == 2
0, 0, 1, 1, 0, 0, 0, 0
0, 0, 0, 0, 1, 1, 1, 1
#endif
#if NET_TC_TX_COUNT == 3
0, 0, 1, 2, 0, 0, 0, 0
0, 0, 0, 0, 1, 1, 2, 2
#endif
#if NET_TC_TX_COUNT == 4
0, 0, 2, 3, 1, 1, 1, 1
0, 0, 1, 1, 2, 2, 3, 3
#endif
#if NET_TC_TX_COUNT == 5
0, 0, 3, 4, 1, 1, 2, 2
0, 0, 1, 1, 2, 2, 3, 4
#endif
#if NET_TC_TX_COUNT == 6
0, 0, 4, 5, 1, 1, 2, 3
0, 1, 2, 2, 3, 3, 4, 5
#endif
#if NET_TC_TX_COUNT == 7
0, 0, 5, 6, 1, 2, 3, 4
0, 1, 2, 3, 4, 4, 5, 6
#endif
#if NET_TC_TX_COUNT == 8
0, 1, 6, 7, 2, 3, 4, 5
0, 1, 2, 3, 4, 5, 6, 7
#endif
};
@ -100,21 +99,20 @@ int net_tx_priority2tc(enum net_priority prio)
int net_rx_priority2tc(enum net_priority prio)
{
/* FIXME: Initial implementation just maps the priority to certain
* traffic class to certain queue. This needs to be made more generic.
*
/*
* Use the example priority -> traffic class mapper found in
* IEEE 802.1Q chapter 8.6.6 table 8.4 and chapter 34.5 table 34-1
* IEEE 802.1Q chapter I.3, chapter 8.6.6 table 8.4 and
* chapter 34.5 table 34-1
*
* Priority Acronym Traffic types
* 0 (lowest) BK Background
* 1 (default) BE Best effort
* 2 EE Excellent effort
* 3 (highest) CA Critical applications
* 3 CA Critical applications
* 4 VI Video, < 100 ms latency and jitter
* 5 VO Voice, < 10 ms latency and jitter
* 6 IC Internetwork control
* 7 NC Network control
* 7 (highest) NC Network control
*/
/* Priority is the index to this array */
static const u8_t tc[] = {
@ -122,25 +120,25 @@ int net_rx_priority2tc(enum net_priority prio)
0, 0, 0, 0, 0, 0, 0, 0
#endif
#if NET_TC_RX_COUNT == 2
0, 0, 1, 1, 0, 0, 0, 0
0, 0, 0, 0, 1, 1, 1, 1
#endif
#if NET_TC_RX_COUNT == 3
0, 0, 1, 2, 0, 0, 0, 0
0, 0, 0, 0, 1, 1, 2, 2
#endif
#if NET_TC_RX_COUNT == 4
0, 0, 2, 3, 1, 1, 1, 1
0, 0, 1, 1, 2, 2, 3, 3
#endif
#if NET_TC_RX_COUNT == 5
0, 0, 3, 4, 1, 1, 2, 2
0, 0, 1, 1, 2, 2, 3, 4
#endif
#if NET_TC_RX_COUNT == 6
0, 0, 4, 5, 1, 1, 2, 3
0, 1, 2, 2, 3, 3, 4, 5
#endif
#if NET_TC_RX_COUNT == 7
0, 0, 5, 6, 1, 2, 3, 4
0, 1, 2, 3, 4, 4, 5, 6
#endif
#if NET_TC_RX_COUNT == 8
0, 1, 6, 7, 2, 3, 4, 5
0, 1, 2, 3, 4, 5, 6, 7
#endif
};