diff options
Diffstat (limited to 'drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c')
| -rw-r--r-- | drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c | 234 |
1 files changed, 227 insertions, 7 deletions
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c b/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c index e5a2bbe064f8..f9ebfaafbebc 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c @@ -3,6 +3,8 @@ #include <linux/ptp_classify.h> #include "lan966x_main.h" +#include "vcap_api.h" +#include "vcap_api_client.h" #define LAN966X_MAX_PTP_ID 512 @@ -18,6 +20,17 @@ #define TOD_ACC_PIN 0x7 +/* This represents the base rule ID for the PTP rules that are added in the + * VCAP to trap frames to CPU. This number needs to be bigger than the maximum + * number of entries that can exist in the VCAP. + */ +#define LAN966X_VCAP_PTP_RULE_ID 1000000 +#define LAN966X_VCAP_L2_PTP_TRAP (LAN966X_VCAP_PTP_RULE_ID + 0) +#define LAN966X_VCAP_IPV4_EV_PTP_TRAP (LAN966X_VCAP_PTP_RULE_ID + 1) +#define LAN966X_VCAP_IPV4_GEN_PTP_TRAP (LAN966X_VCAP_PTP_RULE_ID + 2) +#define LAN966X_VCAP_IPV6_EV_PTP_TRAP (LAN966X_VCAP_PTP_RULE_ID + 3) +#define LAN966X_VCAP_IPV6_GEN_PTP_TRAP (LAN966X_VCAP_PTP_RULE_ID + 4) + enum { PTP_PIN_ACTION_IDLE = 0, PTP_PIN_ACTION_LOAD, @@ -35,19 +48,226 @@ static u64 lan966x_ptp_get_nominal_value(void) return 0x304d4873ecade305; } +static int lan966x_ptp_add_trap(struct lan966x_port *port, + int (*add_ptp_key)(struct vcap_rule *vrule, + struct lan966x_port*), + u32 rule_id, + u16 proto) +{ + struct lan966x *lan966x = port->lan966x; + struct vcap_rule *vrule; + int err; + + vrule = vcap_get_rule(lan966x->vcap_ctrl, rule_id); + if (vrule) { + u32 value, mask; + + /* Just modify the ingress port mask and exit */ + vcap_rule_get_key_u32(vrule, VCAP_KF_IF_IGR_PORT_MASK, + &value, &mask); + mask &= ~BIT(port->chip_port); + vcap_rule_mod_key_u32(vrule, VCAP_KF_IF_IGR_PORT_MASK, + value, mask); + + err = vcap_mod_rule(vrule); + goto free_rule; + } + + vrule = vcap_alloc_rule(lan966x->vcap_ctrl, port->dev, + LAN966X_VCAP_CID_IS2_L0, + VCAP_USER_PTP, 0, rule_id); + if (IS_ERR(vrule)) + return PTR_ERR(vrule); + + err = add_ptp_key(vrule, port); + if (err) + goto free_rule; + + err = vcap_set_rule_set_actionset(vrule, VCAP_AFS_BASE_TYPE); + err |= vcap_rule_add_action_bit(vrule, VCAP_AF_CPU_COPY_ENA, VCAP_BIT_1); + err |= vcap_rule_add_action_u32(vrule, VCAP_AF_MASK_MODE, LAN966X_PMM_REPLACE); + err |= vcap_val_rule(vrule, proto); + if (err) + goto free_rule; + + err = vcap_add_rule(vrule); + +free_rule: + /* Free the local copy of the rule */ + vcap_free_rule(vrule); + return err; +} + +static int lan966x_ptp_del_trap(struct lan966x_port *port, + u32 rule_id) +{ + struct lan966x *lan966x = port->lan966x; + struct vcap_rule *vrule; + u32 value, mask; + int err; + + vrule = vcap_get_rule(lan966x->vcap_ctrl, rule_id); + if (!vrule) + return -EEXIST; + + vcap_rule_get_key_u32(vrule, VCAP_KF_IF_IGR_PORT_MASK, &value, &mask); + mask |= BIT(port->chip_port); + + /* No other port requires this trap, so it is safe to remove it */ + if (mask == GENMASK(lan966x->num_phys_ports, 0)) { + err = vcap_del_rule(lan966x->vcap_ctrl, port->dev, rule_id); + goto free_rule; + } + + vcap_rule_mod_key_u32(vrule, VCAP_KF_IF_IGR_PORT_MASK, value, mask); + err = vcap_mod_rule(vrule); + +free_rule: + vcap_free_rule(vrule); + return err; +} + +static int lan966x_ptp_add_l2_key(struct vcap_rule *vrule, + struct lan966x_port *port) +{ + return vcap_rule_add_key_u32(vrule, VCAP_KF_ETYPE, ETH_P_1588, ~0); +} + +static int lan966x_ptp_add_ip_event_key(struct vcap_rule *vrule, + struct lan966x_port *port) +{ + return vcap_rule_add_key_u32(vrule, VCAP_KF_L4_DPORT, PTP_EV_PORT, ~0) || + vcap_rule_add_key_bit(vrule, VCAP_KF_TCP_IS, VCAP_BIT_0); +} + +static int lan966x_ptp_add_ip_general_key(struct vcap_rule *vrule, + struct lan966x_port *port) +{ + return vcap_rule_add_key_u32(vrule, VCAP_KF_L4_DPORT, PTP_GEN_PORT, ~0) || + vcap_rule_add_key_bit(vrule, VCAP_KF_TCP_IS, VCAP_BIT_0); +} + +static int lan966x_ptp_add_l2_rule(struct lan966x_port *port) +{ + return lan966x_ptp_add_trap(port, lan966x_ptp_add_l2_key, + LAN966X_VCAP_L2_PTP_TRAP, ETH_P_ALL); +} + +static int lan966x_ptp_add_ipv4_rules(struct lan966x_port *port) +{ + int err; + + err = lan966x_ptp_add_trap(port, lan966x_ptp_add_ip_event_key, + LAN966X_VCAP_IPV4_EV_PTP_TRAP, ETH_P_IP); + if (err) + return err; + + err = lan966x_ptp_add_trap(port, lan966x_ptp_add_ip_general_key, + LAN966X_VCAP_IPV4_GEN_PTP_TRAP, ETH_P_IP); + if (err) + lan966x_ptp_del_trap(port, LAN966X_VCAP_IPV4_EV_PTP_TRAP); + + return err; +} + +static int lan966x_ptp_add_ipv6_rules(struct lan966x_port *port) +{ + int err; + + err = lan966x_ptp_add_trap(port, lan966x_ptp_add_ip_event_key, + LAN966X_VCAP_IPV6_EV_PTP_TRAP, ETH_P_IPV6); + if (err) + return err; + + err = lan966x_ptp_add_trap(port, lan966x_ptp_add_ip_general_key, + LAN966X_VCAP_IPV6_GEN_PTP_TRAP, ETH_P_IPV6); + if (err) + lan966x_ptp_del_trap(port, LAN966X_VCAP_IPV6_EV_PTP_TRAP); + + return err; +} + +static int lan966x_ptp_del_l2_rule(struct lan966x_port *port) +{ + return lan966x_ptp_del_trap(port, LAN966X_VCAP_L2_PTP_TRAP); +} + +static int lan966x_ptp_del_ipv4_rules(struct lan966x_port *port) +{ + int err; + + err = lan966x_ptp_del_trap(port, LAN966X_VCAP_IPV4_EV_PTP_TRAP); + err |= lan966x_ptp_del_trap(port, LAN966X_VCAP_IPV4_GEN_PTP_TRAP); + + return err; +} + +static int lan966x_ptp_del_ipv6_rules(struct lan966x_port *port) +{ + int err; + + err = lan966x_ptp_del_trap(port, LAN966X_VCAP_IPV6_EV_PTP_TRAP); + err |= lan966x_ptp_del_trap(port, LAN966X_VCAP_IPV6_GEN_PTP_TRAP); + + return err; +} + +static int lan966x_ptp_add_traps(struct lan966x_port *port) +{ + int err; + + err = lan966x_ptp_add_l2_rule(port); + if (err) + goto err_l2; + + err = lan966x_ptp_add_ipv4_rules(port); + if (err) + goto err_ipv4; + + err = lan966x_ptp_add_ipv6_rules(port); + if (err) + goto err_ipv6; + + return err; + +err_ipv6: + lan966x_ptp_del_ipv4_rules(port); +err_ipv4: + lan966x_ptp_del_l2_rule(port); +err_l2: + return err; +} + +int lan966x_ptp_del_traps(struct lan966x_port *port) +{ + int err; + + err = lan966x_ptp_del_l2_rule(port); + err |= lan966x_ptp_del_ipv4_rules(port); + err |= lan966x_ptp_del_ipv6_rules(port); + + return err; +} + +int lan966x_ptp_setup_traps(struct lan966x_port *port, struct ifreq *ifr) +{ + struct hwtstamp_config cfg; + + if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg))) + return -EFAULT; + + if (cfg.rx_filter == HWTSTAMP_FILTER_NONE) + return lan966x_ptp_del_traps(port); + else + return lan966x_ptp_add_traps(port); +} + int lan966x_ptp_hwtstamp_set(struct lan966x_port *port, struct ifreq *ifr) { struct lan966x *lan966x = port->lan966x; struct hwtstamp_config cfg; struct lan966x_phc *phc; - /* For now don't allow to run ptp on ports that are part of a bridge, - * because in case of transparent clock the HW will still forward the - * frames, so there would be duplicate frames - */ - if (lan966x->bridge_mask & BIT(port->chip_port)) - return -EINVAL; - if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg))) return -EFAULT; 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