From 2ccb1ac2d01819c857ae8f52d0bcace1c9a8d74c Mon Sep 17 00:00:00 2001 From: Oleksij Rempel Date: Fri, 10 May 2024 07:38:26 +0200 Subject: [PATCH 1/3] net: dsa: microchip: dcb: rename IPV to IPM IPV is added and used term in 802.1Qci PSFP and merged into 802.1Q (from 802.1Q-2018) for another functions. Even it does similar operation holding temporal priority value internally (as it is named), because KSZ datasheet doesn't use the term of IPV (Internal Priority Value) and avoiding any confusion later when PSFP is in the Linux world, it is better to rename IPV to IPM (Internal Priority Mapping). In addition, LAN937x documentation already use IPV for 802.1Qci PSFP related functionality. Suggested-by: Woojung Huh Signed-off-by: Oleksij Rempel Reviewed-by: Woojung Huh Reviewed-by: Simon Horman Link: https://lore.kernel.org/r/20240510053828.2412516-2-o.rempel@pengutronix.de Signed-off-by: Jakub Kicinski --- drivers/net/dsa/microchip/ksz_common.c | 46 +++++++++++----------- drivers/net/dsa/microchip/ksz_common.h | 2 +- drivers/net/dsa/microchip/ksz_dcb.c | 54 +++++++++++++------------- 3 files changed, 51 insertions(+), 51 deletions(-) diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c index bbf9925c98d9..1e0085cd9a9a 100644 --- a/drivers/net/dsa/microchip/ksz_common.c +++ b/drivers/net/dsa/microchip/ksz_common.c @@ -1227,7 +1227,7 @@ const struct ksz_chip_data ksz_switch_chips[] = { .port_cnt = 3, /* total port count */ .port_nirqs = 3, .num_tx_queues = 4, - .num_ipvs = 8, + .num_ipms = 8, .tc_cbs_supported = true, .ops = &ksz9477_dev_ops, .phylink_mac_ops = &ksz9477_phylink_mac_ops, @@ -1257,7 +1257,7 @@ const struct ksz_chip_data ksz_switch_chips[] = { .cpu_ports = 0x10, /* can be configured as cpu port */ .port_cnt = 5, /* total cpu and user ports */ .num_tx_queues = 4, - .num_ipvs = 4, + .num_ipms = 4, .ops = &ksz8_dev_ops, .phylink_mac_ops = &ksz8_phylink_mac_ops, .ksz87xx_eee_link_erratum = true, @@ -1298,7 +1298,7 @@ const struct ksz_chip_data ksz_switch_chips[] = { .cpu_ports = 0x10, /* can be configured as cpu port */ .port_cnt = 5, /* total cpu and user ports */ .num_tx_queues = 4, - .num_ipvs = 4, + .num_ipms = 4, .ops = &ksz8_dev_ops, .phylink_mac_ops = &ksz8_phylink_mac_ops, .ksz87xx_eee_link_erratum = true, @@ -1325,7 +1325,7 @@ const struct ksz_chip_data ksz_switch_chips[] = { .cpu_ports = 0x10, /* can be configured as cpu port */ .port_cnt = 5, /* total cpu and user ports */ .num_tx_queues = 4, - .num_ipvs = 4, + .num_ipms = 4, .ops = &ksz8_dev_ops, .phylink_mac_ops = &ksz8_phylink_mac_ops, .ksz87xx_eee_link_erratum = true, @@ -1352,7 +1352,7 @@ const struct ksz_chip_data ksz_switch_chips[] = { .cpu_ports = 0x4, /* can be configured as cpu port */ .port_cnt = 3, .num_tx_queues = 4, - .num_ipvs = 4, + .num_ipms = 4, .ops = &ksz8_dev_ops, .phylink_mac_ops = &ksz8830_phylink_mac_ops, .mib_names = ksz88xx_mib_names, @@ -1378,7 +1378,7 @@ const struct ksz_chip_data ksz_switch_chips[] = { .port_cnt = 7, /* total physical port count */ .port_nirqs = 4, .num_tx_queues = 4, - .num_ipvs = 8, + .num_ipms = 8, .tc_cbs_supported = true, .ops = &ksz9477_dev_ops, .phylink_mac_ops = &ksz9477_phylink_mac_ops, @@ -1413,7 +1413,7 @@ const struct ksz_chip_data ksz_switch_chips[] = { .port_cnt = 6, /* total physical port count */ .port_nirqs = 2, .num_tx_queues = 4, - .num_ipvs = 8, + .num_ipms = 8, .ops = &ksz9477_dev_ops, .phylink_mac_ops = &ksz9477_phylink_mac_ops, .mib_names = ksz9477_mib_names, @@ -1447,7 +1447,7 @@ const struct ksz_chip_data ksz_switch_chips[] = { .port_cnt = 7, /* total physical port count */ .port_nirqs = 2, .num_tx_queues = 4, - .num_ipvs = 8, + .num_ipms = 8, .ops = &ksz9477_dev_ops, .phylink_mac_ops = &ksz9477_phylink_mac_ops, .mib_names = ksz9477_mib_names, @@ -1479,7 +1479,7 @@ const struct ksz_chip_data ksz_switch_chips[] = { .port_cnt = 3, /* total port count */ .port_nirqs = 2, .num_tx_queues = 4, - .num_ipvs = 8, + .num_ipms = 8, .ops = &ksz9477_dev_ops, .phylink_mac_ops = &ksz9477_phylink_mac_ops, .mib_names = ksz9477_mib_names, @@ -1507,7 +1507,7 @@ const struct ksz_chip_data ksz_switch_chips[] = { .port_cnt = 3, /* total port count */ .port_nirqs = 3, .num_tx_queues = 4, - .num_ipvs = 8, + .num_ipms = 8, .tc_cbs_supported = true, .ops = &ksz9477_dev_ops, .phylink_mac_ops = &ksz9477_phylink_mac_ops, @@ -1536,7 +1536,7 @@ const struct ksz_chip_data ksz_switch_chips[] = { .port_cnt = 7, /* total port count */ .port_nirqs = 3, .num_tx_queues = 4, - .num_ipvs = 8, + .num_ipms = 8, .tc_cbs_supported = true, .ops = &ksz9477_dev_ops, .phylink_mac_ops = &ksz9477_phylink_mac_ops, @@ -1570,7 +1570,7 @@ const struct ksz_chip_data ksz_switch_chips[] = { .port_cnt = 7, /* total physical port count */ .port_nirqs = 3, .num_tx_queues = 4, - .num_ipvs = 8, + .num_ipms = 8, .tc_cbs_supported = true, .ops = &ksz9477_dev_ops, .mib_names = ksz9477_mib_names, @@ -1602,7 +1602,7 @@ const struct ksz_chip_data ksz_switch_chips[] = { .port_cnt = 5, /* total physical port count */ .port_nirqs = 6, .num_tx_queues = 8, - .num_ipvs = 8, + .num_ipms = 8, .tc_cbs_supported = true, .ops = &lan937x_dev_ops, .phylink_mac_ops = &lan937x_phylink_mac_ops, @@ -1630,7 +1630,7 @@ const struct ksz_chip_data ksz_switch_chips[] = { .port_cnt = 6, /* total physical port count */ .port_nirqs = 6, .num_tx_queues = 8, - .num_ipvs = 8, + .num_ipms = 8, .tc_cbs_supported = true, .ops = &lan937x_dev_ops, .phylink_mac_ops = &lan937x_phylink_mac_ops, @@ -1658,7 +1658,7 @@ const struct ksz_chip_data ksz_switch_chips[] = { .port_cnt = 8, /* total physical port count */ .port_nirqs = 6, .num_tx_queues = 8, - .num_ipvs = 8, + .num_ipms = 8, .tc_cbs_supported = true, .ops = &lan937x_dev_ops, .phylink_mac_ops = &lan937x_phylink_mac_ops, @@ -1690,7 +1690,7 @@ const struct ksz_chip_data ksz_switch_chips[] = { .port_cnt = 5, /* total physical port count */ .port_nirqs = 6, .num_tx_queues = 8, - .num_ipvs = 8, + .num_ipms = 8, .tc_cbs_supported = true, .ops = &lan937x_dev_ops, .phylink_mac_ops = &lan937x_phylink_mac_ops, @@ -1722,7 +1722,7 @@ const struct ksz_chip_data ksz_switch_chips[] = { .port_cnt = 8, /* total physical port count */ .port_nirqs = 6, .num_tx_queues = 8, - .num_ipvs = 8, + .num_ipms = 8, .tc_cbs_supported = true, .ops = &lan937x_dev_ops, .phylink_mac_ops = &lan937x_phylink_mac_ops, @@ -2726,20 +2726,20 @@ static int ksz9477_set_default_prio_queue_mapping(struct ksz_device *dev, int port) { u32 queue_map = 0; - int ipv; + int ipm; - for (ipv = 0; ipv < dev->info->num_ipvs; ipv++) { + for (ipm = 0; ipm < dev->info->num_ipms; ipm++) { int queue; /* Traffic Type (TT) is corresponding to the Internal Priority - * Value (IPV) in the switch. Traffic Class (TC) is + * Map (IPM) in the switch. Traffic Class (TC) is * corresponding to the queue in the switch. */ - queue = ieee8021q_tt_to_tc(ipv, dev->info->num_tx_queues); + queue = ieee8021q_tt_to_tc(ipm, dev->info->num_tx_queues); if (queue < 0) return queue; - queue_map |= queue << (ipv * KSZ9477_PORT_TC_MAP_S); + queue_map |= queue << (ipm * KSZ9477_PORT_TC_MAP_S); } return ksz_pwrite32(dev, port, KSZ9477_PORT_MRI_TC_MAP__4, queue_map); @@ -3609,7 +3609,7 @@ static int ksz_tc_ets_add(struct ksz_device *dev, int port, for (tc_prio = 0; tc_prio < ARRAY_SIZE(p->priomap); tc_prio++) { int queue; - if (tc_prio >= dev->info->num_ipvs) + if (tc_prio >= dev->info->num_ipms) break; queue = ksz_ets_band_to_queue(p, p->priomap[tc_prio]); diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h index baf236792e10..c784fd23a993 100644 --- a/drivers/net/dsa/microchip/ksz_common.h +++ b/drivers/net/dsa/microchip/ksz_common.h @@ -62,7 +62,7 @@ struct ksz_chip_data { int port_cnt; u8 port_nirqs; u8 num_tx_queues; - u8 num_ipvs; /* number of Internal Priority Values */ + u8 num_ipms; /* number of Internal Priority Maps */ bool tc_cbs_supported; const struct ksz_dev_ops *ops; const struct phylink_mac_ops *phylink_mac_ops; diff --git a/drivers/net/dsa/microchip/ksz_dcb.c b/drivers/net/dsa/microchip/ksz_dcb.c index 484945a9c5fb..2a7c6a021b0a 100644 --- a/drivers/net/dsa/microchip/ksz_dcb.c +++ b/drivers/net/dsa/microchip/ksz_dcb.c @@ -52,7 +52,7 @@ static const struct ksz_apptrust_map ksz9477_apptrust_map_to_bit[] = { }; /* ksz_supported_apptrust[] - Supported apptrust selectors and Priority Order - * of Internal Priority Value (IPV) sources. + * of Internal Priority Map (IPM) sources. * * This array defines the apptrust selectors supported by the hardware, where * the index within the array indicates the priority of the selector - lower @@ -246,7 +246,7 @@ int ksz_port_set_default_prio(struct dsa_switch *ds, int port, u8 prio) int reg, shift, ret; u8 mask; - if (prio >= dev->info->num_ipvs) + if (prio >= dev->info->num_ipms) return -EINVAL; if (ksz_is_ksz88x3(dev)) { @@ -282,7 +282,7 @@ int ksz_port_get_dscp_prio(struct dsa_switch *ds, int port, u8 dscp) ksz_get_dscp_prio_reg(dev, ®, &per_reg, &mask); /* If DSCP remapping is disabled, DSCP bits 3-5 are used as Internal - * Priority Value (IPV) + * Priority Map (IPM) */ if (!is_ksz8(dev)) { ret = ksz_read8(dev, KSZ9477_REG_SW_MAC_TOS_CTRL, &data); @@ -290,7 +290,7 @@ int ksz_port_get_dscp_prio(struct dsa_switch *ds, int port, u8 dscp) return ret; /* If DSCP remapping is disabled, DSCP bits 3-5 are used as - * Internal Priority Value (IPV) + * Internal Priority Map (IPM) */ if (!(data & KSZ9477_SW_TOS_DSCP_REMAP)) return FIELD_GET(KSZ9477_SW_TOS_DSCP_DEFAULT_PRIO_M, @@ -310,7 +310,7 @@ int ksz_port_get_dscp_prio(struct dsa_switch *ds, int port, u8 dscp) return (data >> shift) & mask; } -static int ksz_set_global_dscp_entry(struct ksz_device *dev, u8 dscp, u8 ipv) +static int ksz_set_global_dscp_entry(struct ksz_device *dev, u8 dscp, u8 ipm) { int reg, per_reg, shift; u8 mask; @@ -320,7 +320,7 @@ static int ksz_set_global_dscp_entry(struct ksz_device *dev, u8 dscp, u8 ipv) shift = (dscp % per_reg) * (8 / per_reg); return ksz_rmw8(dev, reg + (dscp / per_reg), mask << shift, - ipv << shift); + ipm << shift); } /** @@ -349,15 +349,15 @@ static int ksz_init_global_dscp_map(struct ksz_device *dev) } for (dscp = 0; dscp < DSCP_MAX; dscp++) { - int ipv, tt; + int ipm, tt; /* Map DSCP to Traffic Type, which is corresponding to the - * Internal Priority Value (IPV) in the switch. + * Internal Priority Map (IPM) in the switch. */ if (!is_ksz8(dev)) { - ipv = ietf_dscp_to_ieee8021q_tt(dscp); + ipm = ietf_dscp_to_ieee8021q_tt(dscp); } else { - /* On KSZ8xxx variants we do not have IPV to queue + /* On KSZ8xxx variants we do not have IPM to queue * remapping table. We need to convert DSCP to Traffic * Type and then to queue. */ @@ -365,13 +365,13 @@ static int ksz_init_global_dscp_map(struct ksz_device *dev) if (tt < 0) return tt; - ipv = ieee8021q_tt_to_tc(tt, dev->info->num_tx_queues); + ipm = ieee8021q_tt_to_tc(tt, dev->info->num_tx_queues); } - if (ipv < 0) - return ipv; + if (ipm < 0) + return ipm; - ret = ksz_set_global_dscp_entry(dev, dscp, ipv); + ret = ksz_set_global_dscp_entry(dev, dscp, ipm); } return 0; @@ -381,7 +381,7 @@ int ksz_port_add_dscp_prio(struct dsa_switch *ds, int port, u8 dscp, u8 prio) { struct ksz_device *dev = ds->priv; - if (prio >= dev->info->num_ipvs) + if (prio >= dev->info->num_ipms) return -ERANGE; return ksz_set_global_dscp_entry(dev, dscp, prio); @@ -390,21 +390,21 @@ int ksz_port_add_dscp_prio(struct dsa_switch *ds, int port, u8 dscp, u8 prio) int ksz_port_del_dscp_prio(struct dsa_switch *ds, int port, u8 dscp, u8 prio) { struct ksz_device *dev = ds->priv; - int ipv; + int ipm; if (ksz_port_get_dscp_prio(ds, port, dscp) != prio) return 0; if (is_ksz8(dev)) { - ipv = ieee8021q_tt_to_tc(IEEE8021Q_TT_BE, + ipm = ieee8021q_tt_to_tc(IEEE8021Q_TT_BE, dev->info->num_tx_queues); - if (ipv < 0) - return ipv; + if (ipm < 0) + return ipm; } else { - ipv = IEEE8021Q_TT_BE; + ipm = IEEE8021Q_TT_BE; } - return ksz_set_global_dscp_entry(dev, dscp, ipv); + return ksz_set_global_dscp_entry(dev, dscp, ipm); } /** @@ -741,20 +741,20 @@ int ksz_port_get_apptrust(struct dsa_switch *ds, int port, u8 *sel, int *nsel) int ksz_dcb_init_port(struct ksz_device *dev, int port) { const u8 *sel; - int ret, ipv; + int ret, ipm; int sel_len; if (is_ksz8(dev)) { - ipv = ieee8021q_tt_to_tc(IEEE8021Q_TT_BE, + ipm = ieee8021q_tt_to_tc(IEEE8021Q_TT_BE, dev->info->num_tx_queues); - if (ipv < 0) - return ipv; + if (ipm < 0) + return ipm; } else { - ipv = IEEE8021Q_TT_BE; + ipm = IEEE8021Q_TT_BE; } /* Set the default priority for the port to Best Effort */ - ret = ksz_port_set_default_prio(dev->ds, port, ipv); + ret = ksz_port_set_default_prio(dev->ds, port, ipm); if (ret) return ret; From 593d6ad1ef43855fd34a48e5a65a793d23fd0d28 Mon Sep 17 00:00:00 2001 From: Oleksij Rempel Date: Fri, 10 May 2024 07:38:27 +0200 Subject: [PATCH 2/3] net: dsa: microchip: dcb: add comments for DSCP related functions All other functions are commented. Add missing comments to following functions: ksz_set_global_dscp_entry() ksz_port_add_dscp_prio() ksz_port_del_dscp_prio() Signed-off-by: Oleksij Rempel Acked-by: Arun Ramadoss Reviewed-by: Simon Horman Link: https://lore.kernel.org/r/20240510053828.2412516-3-o.rempel@pengutronix.de Signed-off-by: Jakub Kicinski --- drivers/net/dsa/microchip/ksz_dcb.c | 31 +++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/drivers/net/dsa/microchip/ksz_dcb.c b/drivers/net/dsa/microchip/ksz_dcb.c index 2a7c6a021b0a..b02dc340dc75 100644 --- a/drivers/net/dsa/microchip/ksz_dcb.c +++ b/drivers/net/dsa/microchip/ksz_dcb.c @@ -310,6 +310,17 @@ int ksz_port_get_dscp_prio(struct dsa_switch *ds, int port, u8 dscp) return (data >> shift) & mask; } +/** + * ksz_set_global_dscp_entry - Sets the global DSCP-to-priority mapping entry + * @dev: Pointer to the KSZ switch device structure + * @dscp: DSCP value for which to set the priority + * @ipm: Priority value to set + * + * This function sets the global DSCP-to-priority mapping entry for the + * specified DSCP value. + * + * Return: 0 on success, or a negative error code on failure. + */ static int ksz_set_global_dscp_entry(struct ksz_device *dev, u8 dscp, u8 ipm) { int reg, per_reg, shift; @@ -377,6 +388,16 @@ static int ksz_init_global_dscp_map(struct ksz_device *dev) return 0; } +/** + * ksz_port_add_dscp_prio - Adds a DSCP-to-priority mapping entry for a port on + * a KSZ switch. + * @ds: Pointer to the DSA switch structure + * @port: Port number for which to add the DSCP-to-priority mapping entry + * @dscp: DSCP value for which to add the priority + * @prio: Priority value to set + * + * Return: 0 on success, or a negative error code on failure + */ int ksz_port_add_dscp_prio(struct dsa_switch *ds, int port, u8 dscp, u8 prio) { struct ksz_device *dev = ds->priv; @@ -387,6 +408,16 @@ int ksz_port_add_dscp_prio(struct dsa_switch *ds, int port, u8 dscp, u8 prio) return ksz_set_global_dscp_entry(dev, dscp, prio); } +/** + * ksz_port_del_dscp_prio - Deletes a DSCP-to-priority mapping entry for a port + * on a KSZ switch. + * @ds: Pointer to the DSA switch structure + * @port: Port number for which to delete the DSCP-to-priority mapping entry + * @dscp: DSCP value for which to delete the priority + * @prio: Priority value to delete + * + * Return: 0 on success, or a negative error code on failure + */ int ksz_port_del_dscp_prio(struct dsa_switch *ds, int port, u8 dscp, u8 prio) { struct ksz_device *dev = ds->priv; From 01e400f29c916b1528c08987eb4abd53e5cdebfb Mon Sep 17 00:00:00 2001 From: Oleksij Rempel Date: Fri, 10 May 2024 07:38:28 +0200 Subject: [PATCH 3/3] net: dsa: microchip: dcb: set default apptrust to PCP only Before DCB support, the KSZ driver had only PCP as source of packet priority values. To avoid regressions, make PCP only as default value. User will need enable DSCP support manually. This patch do not affect other KSZ8 related quirks. User will still be warned by setting not support configurations for the port 2. Signed-off-by: Oleksij Rempel Acked-by: Arun Ramadoss Reviewed-by: Simon Horman Link: https://lore.kernel.org/r/20240510053828.2412516-4-o.rempel@pengutronix.de Signed-off-by: Jakub Kicinski --- drivers/net/dsa/microchip/ksz_dcb.c | 21 +++------------------ 1 file changed, 3 insertions(+), 18 deletions(-) diff --git a/drivers/net/dsa/microchip/ksz_dcb.c b/drivers/net/dsa/microchip/ksz_dcb.c index b02dc340dc75..a97106327562 100644 --- a/drivers/net/dsa/microchip/ksz_dcb.c +++ b/drivers/net/dsa/microchip/ksz_dcb.c @@ -82,10 +82,6 @@ static const u8 ksz_supported_apptrust[] = { IEEE_8021QAZ_APP_SEL_DSCP, }; -static const u8 ksz8_port2_supported_apptrust[] = { - DCB_APP_SEL_PCP, -}; - static const char * const ksz_supported_apptrust_variants[] = { "empty", "dscp", "pcp", "dscp pcp" }; @@ -771,9 +767,8 @@ int ksz_port_get_apptrust(struct dsa_switch *ds, int port, u8 *sel, int *nsel) */ int ksz_dcb_init_port(struct ksz_device *dev, int port) { - const u8 *sel; + const u8 ksz_default_apptrust[] = { DCB_APP_SEL_PCP }; int ret, ipm; - int sel_len; if (is_ksz8(dev)) { ipm = ieee8021q_tt_to_tc(IEEE8021Q_TT_BE, @@ -789,18 +784,8 @@ int ksz_dcb_init_port(struct ksz_device *dev, int port) if (ret) return ret; - if (ksz_is_ksz88x3(dev) && port == KSZ_PORT_2) { - /* KSZ88x3 devices do not support DSCP classification on - * "Port 2. - */ - sel = ksz8_port2_supported_apptrust; - sel_len = ARRAY_SIZE(ksz8_port2_supported_apptrust); - } else { - sel = ksz_supported_apptrust; - sel_len = ARRAY_SIZE(ksz_supported_apptrust); - } - - return ksz_port_set_apptrust(dev->ds, port, sel, sel_len); + return ksz_port_set_apptrust(dev->ds, port, ksz_default_apptrust, + ARRAY_SIZE(ksz_default_apptrust)); } /**