| Message ID | 20241105-am65-cpsw-multi-rx-dscp-v1-1-38db85333c88@kernel.org (mailing list archive) |
|---|---|
| State | New |
| 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nitpick: s/superseeds/supersedes Also, according to: https://standards.ieee.org/ieee/802.1D/3387/ IEEE 802.1D-2004 is superseded by 802.1Q-2014, so: s/IEEE802.1Q-2004/IEEE802.1Q-2014/g 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.
On 06/11/2024 07:22, Siddharth Vadapalli wrote: > 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 ok > > 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 Thanks! > >> >> 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." I agree. Will update in v2. Thanks for review. > >> + * 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.
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 + * 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);
IEEE802.1Q-2004 superseeds 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-2004, Standard for Local and metropolitan area networks Table G-2 - Traffic type acronyms Table G-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(-)