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net: ethernet: ti: am65-cpsw: update pri_thread_map as per IEEE802.1Q-2014

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IEEE802.1Q-2014 supersedes IEEE802.1D-2004. Now Priority Code Point (PCP)
2 is no longer at a lower priority than PCP 0. PCP 1 (Background) is still
at a lower priority than PCP 0 (Best Effort).

Reference:
IEEE802.1Q-2014, Standard for Local and metropolitan area networks
  Table I-2 - Traffic type acronyms
  Table I-3 - Defining traffic types

Signed-off-by: Roger Quadros <rogerq@kernel.org>
Reviewed-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Reviewed-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Roger Quadros 2024-11-14 15:36:52 +02:00 committed by David S. Miller
parent ac60031f79
commit 01a45daebb
1 changed files with 22 additions and 14 deletions
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36
drivers/net/ethernet/ti/cpsw_ale.c
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@ -1704,26 +1704,34 @@ static void cpsw_ale_policer_reset(struct cpsw_ale *ale)
void cpsw_ale_classifier_setup_default(struct cpsw_ale *ale, int num_rx_ch)
{
int pri, idx;
/* IEEE802.1D-2004, Standard for Local and metropolitan area networks
* Table G-2 - Traffic type acronyms
* Table G-3 - Defining traffic types
* User priority values 1 and 2 effectively communicate a lower
* priority than 0. In the below table 0 is assigned to higher priority
* thread than 1 and 2 wherever possible.
* The below table maps which thread the user priority needs to be
/* Reference:
* IEEE802.1Q-2014, Standard for Local and metropolitan area networks
* Table I-2 - Traffic type acronyms
* Table I-3 - Defining traffic types
* Section I.4 Traffic types and priority values, states:
* "0 is thus used both for default priority and for Best Effort, and
* Background is associated with a priority value of 1. This means
* that the value 1 effectively communicates a lower priority than 0."
*
* In the table below, Priority Code Point (PCP) 0 is assigned
* to a higher priority thread than PCP 1 wherever possible.
* The table maps which thread the PCP traffic needs to be
* sent to for a given number of threads (RX channels). Upper threads
* have higher priority.
* e.g. if number of threads is 8 then user priority 0 will map to
* pri_thread_map[8-1][0] i.e. thread 2
* pri_thread_map[8-1][0] i.e. thread 1
*/
int pri_thread_map[8][8] = { { 0, 0, 0, 0, 0, 0, 0, 0, },
int pri_thread_map[8][8] = { /* BK,BE,EE,CA,VI,VO,IC,NC */
{ 0, 0, 0, 0, 0, 0, 0, 0, },
{ 0, 0, 0, 0, 1, 1, 1, 1, },
{ 0, 0, 0, 0, 1, 1, 2, 2, },
{ 1, 0, 0, 1, 2, 2, 3, 3, },
{ 1, 0, 0, 1, 2, 3, 4, 4, },
{ 1, 0, 0, 2, 3, 4, 5, 5, },
{ 1, 0, 0, 2, 3, 4, 5, 6, },
{ 2, 0, 1, 3, 4, 5, 6, 7, } };
{ 0, 0, 1, 1, 2, 2, 3, 3, },
{ 0, 0, 1, 1, 2, 2, 3, 4, },
{ 1, 0, 2, 2, 3, 3, 4, 5, },
{ 1, 0, 2, 3, 4, 4, 5, 6, },
{ 1, 0, 2, 3, 4, 5, 6, 7 } };
cpsw_ale_policer_reset(ale);