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Message-Id: <20241114-am65-cpsw-multi-rx-dscp-v4-1-93eaf6760759@kernel.org>
Date: Thu, 14 Nov 2024 15:36:52 +0200
From: Roger Quadros <rogerq@...nel.org>
To: Siddharth Vadapalli <s-vadapalli@...com>,
Andrew Lunn <andrew+netdev@...n.ch>,
"David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
Simon Horman <horms@...nel.org>, Guillaume Nault <gnault@...hat.com>
Cc: linux-omap@...r.kernel.org, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org, srk@...com, Pekka Varis <p-varis@...com>,
Roger Quadros <rogerq@...nel.org>
Subject: [PATCH net-next v4 1/2] net: ethernet: ti: am65-cpsw: update
pri_thread_map as per IEEE802.1Q-2014
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@...nel.org>
Reviewed-by: Siddharth Vadapalli <s-vadapalli@...com>
---
drivers/net/ethernet/ti/cpsw_ale.c | 36 ++++++++++++++++++++++--------------
1 file changed, 22 insertions(+), 14 deletions(-)
diff --git a/drivers/net/ethernet/ti/cpsw_ale.c b/drivers/net/ethernet/ti/cpsw_ale.c
index 8d02d2b21429..9f79056b3f48 100644
--- a/drivers/net/ethernet/ti/cpsw_ale.c
+++ b/drivers/net/ethernet/ti/cpsw_ale.c
@@ -1692,26 +1692,34 @@ 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);
--
2.34.1
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