| Message ID | 20241105-am65-cpsw-multi-rx-dscp-v1-0-38db85333c88@kernel.org |
|---|---|
| Headers | show |
| Series | net: ethernet: ti: am65-cpsw: enable DSCP to priority map for RX | expand |
On Tue, Nov 05, 2024 at 04:18:10PM +0200, Roger Quadros wrote: Hello Roger, > IEEE802.1Q-2004 superseeds IEEE802.1D-2004. Now Priority Code Point (PCP) nitpick: s/superseeds/supersedes Also, according to: https://standards.ieee.org/ieee/802.1D/3387/ IEEE 802.1D-2004 is superseded by 802.1Q-2014, so: s/IEEE802.1Q-2004/IEEE802.1Q-2014/g > 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-2004, Standard for Local and metropolitan area networks > Table G-2 - Traffic type acronyms > Table G-3 - Defining traffic types In IEEE802.1Q-2014, the tables are: Table I-2—Traffic type acronyms Table I-3—Defining traffic types > > Signed-off-by: Roger Quadros <rogerq@kernel.org> > --- > drivers/net/ethernet/ti/cpsw_ale.c | 25 ++++++++++++++----------- > 1 file changed, 14 insertions(+), 11 deletions(-) > > diff --git a/drivers/net/ethernet/ti/cpsw_ale.c b/drivers/net/ethernet/ti/cpsw_ale.c > index 8d02d2b21429..7dadd95cadc5 100644 > --- a/drivers/net/ethernet/ti/cpsw_ale.c > +++ b/drivers/net/ethernet/ti/cpsw_ale.c > @@ -1692,26 +1692,29 @@ 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 > + /* IEEE802.1Q-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. > + * Also: https://en.wikipedia.org/wiki/IEEE_P802.1p#Priority_levels Since links might change, it might be better to drop this and quote section I.4 Traffic types and priority values of IEEE802.1Q-2014 which 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." > + * Priority Code Point (PCP) value 1 (Background) communicates a lower > + * priority than 0 (Best Effort). In the below table PCP 0 is assigned > + * to a higher priority thread than PCP 1 wherever possible. > * The below table maps which thread the user priority 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); Regards, Siddharth.
Configure DSCP to Priority mapping registers so that IP precedence field (top 3 bits of DSCP) map it to one of the 8 priority queues for RX traffic. Also update Priority to Thread maping to be compliant with IEEE802.1Q-2004. Priority Code Point (PCP) 2 is higher priority than PCP 0 (Best Effort). PCP 1 (Background) is lower priority than PCP 0 (Best Effort). Signed-off-by: Roger Quadros <rogerq@kernel.org> --- Roger Quadros (2): net: ethernet: ti: am65-cpsw: update pri_thread_map as per IEEE802.1Q-2004 net: ethernet: ti: am65-cpsw: enable DSCP to priority map for RX drivers/net/ethernet/ti/am65-cpsw-nuss.c | 50 ++++++++++++++++++++++++++++++++ drivers/net/ethernet/ti/cpsw_ale.c | 25 +++++++++------- 2 files changed, 64 insertions(+), 11 deletions(-) --- base-commit: 42f7652d3eb527d03665b09edac47f85fb600924 change-id: 20241101-am65-cpsw-multi-rx-dscp-000b2c4af6d0 Best regards,