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net: lan966x: Implement SIOCSHWTSTAMP and SIOCGHWTSTAMP 

Implement the ioctl callbacks SIOCSHWTSTAMP and SIOCGHWTSTAMP to allow
to configure the ports to enable/disable timestamping for TX. The RX
timestamping is always enabled. The HW is capable to run both 1-step
timestamping and 2-step timestamping.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Horatiu Vultur 2022-01-31 11:01:19 +01:00 committed by David S. Miller
parent d096459494
commit 735fec995b
3 changed files with 100 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/net/ethernet/microchip/lan966x/lan966x_main.c
View File

@ -351,6 +351,23 @@ static int lan966x_port_get_parent_id(struct net_device *dev,
return 0;
}
static int lan966x_port_ioctl(struct net_device *dev, struct ifreq *ifr,
int cmd)
{
struct lan966x_port *port = netdev_priv(dev);
if (!phy_has_hwtstamp(dev->phydev) && port->lan966x->ptp) {
switch (cmd) {
case SIOCSHWTSTAMP:
return lan966x_ptp_hwtstamp_set(port, ifr);
case SIOCGHWTSTAMP:
return lan966x_ptp_hwtstamp_get(port, ifr);
}
}
return phy_mii_ioctl(dev->phydev, ifr, cmd);
}
static const struct net_device_ops lan966x_port_netdev_ops = {
.ndo_open = lan966x_port_open,
.ndo_stop = lan966x_port_stop,
@ -361,6 +378,7 @@ static const struct net_device_ops lan966x_port_netdev_ops = {
.ndo_get_stats64 = lan966x_stats_get,
.ndo_set_mac_address = lan966x_port_set_mac_address,
.ndo_get_port_parent_id = lan966x_port_get_parent_id,
.ndo_eth_ioctl = lan966x_port_ioctl,
};
bool lan966x_netdevice_check(const struct net_device *dev)

9
drivers/net/ethernet/microchip/lan966x/lan966x_main.h
View File

@ -54,6 +54,10 @@
#define LAN966X_PHC_COUNT 3
#define LAN966X_PHC_PORT 0
#define IFH_REW_OP_NOOP 0x0
#define IFH_REW_OP_ONE_STEP_PTP 0x3
#define IFH_REW_OP_TWO_STEP_PTP 0x4
/* MAC table entry types.
* ENTRYTYPE_NORMAL is subject to aging.
* ENTRYTYPE_LOCKED is not subject to aging.
@ -130,6 +134,7 @@ struct lan966x {
bool ptp;
struct lan966x_phc phc[LAN966X_PHC_COUNT];
spinlock_t ptp_clock_lock; /* lock for phc */
struct mutex ptp_lock; /* lock for ptp interface state */
};
struct lan966x_port_config {
@ -159,6 +164,8 @@ struct lan966x_port {
struct phylink *phylink;
struct phy *serdes;
struct fwnode_handle *fwnode;
u8 ptp_cmd;
};
extern const struct phylink_mac_ops lan966x_phylink_mac_ops;
@ -247,6 +254,8 @@ void lan966x_mdb_write_entries(struct lan966x *lan966x, u16 vid);
int lan966x_ptp_init(struct lan966x *lan966x);
void lan966x_ptp_deinit(struct lan966x *lan966x);
int lan966x_ptp_hwtstamp_set(struct lan966x_port *port, struct ifreq *ifr);
int lan966x_ptp_hwtstamp_get(struct lan966x_port *port, struct ifreq *ifr);
static inline void __iomem *lan_addr(void __iomem *base[],
int id, int tinst, int tcnt,

73
drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c
View File

@ -35,6 +35,78 @@ static u64 lan966x_ptp_get_nominal_value(void)
return res;
}
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;
switch (cfg.tx_type) {
case HWTSTAMP_TX_ON:
port->ptp_cmd = IFH_REW_OP_TWO_STEP_PTP;
break;
case HWTSTAMP_TX_ONESTEP_SYNC:
port->ptp_cmd = IFH_REW_OP_ONE_STEP_PTP;
break;
case HWTSTAMP_TX_OFF:
port->ptp_cmd = IFH_REW_OP_NOOP;
break;
default:
return -ERANGE;
}
switch (cfg.rx_filter) {
case HWTSTAMP_FILTER_NONE:
break;
case HWTSTAMP_FILTER_ALL:
case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
case HWTSTAMP_FILTER_PTP_V2_EVENT:
case HWTSTAMP_FILTER_PTP_V2_SYNC:
case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
case HWTSTAMP_FILTER_NTP_ALL:
cfg.rx_filter = HWTSTAMP_FILTER_ALL;
break;
default:
return -ERANGE;
}
/* Commit back the result & save it */
mutex_lock(&lan966x->ptp_lock);
phc = &lan966x->phc[LAN966X_PHC_PORT];
memcpy(&phc->hwtstamp_config, &cfg, sizeof(cfg));
mutex_unlock(&lan966x->ptp_lock);
return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
}
int lan966x_ptp_hwtstamp_get(struct lan966x_port *port, struct ifreq *ifr)
{
struct lan966x *lan966x = port->lan966x;
struct lan966x_phc *phc;
phc = &lan966x->phc[LAN966X_PHC_PORT];
return copy_to_user(ifr->ifr_data, &phc->hwtstamp_config,
sizeof(phc->hwtstamp_config)) ? -EFAULT : 0;
}
static int lan966x_ptp_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)
{
struct lan966x_phc *phc = container_of(ptp, struct lan966x_phc, info);
@ -252,6 +324,7 @@ int lan966x_ptp_init(struct lan966x *lan966x)
}
spin_lock_init(&lan966x->ptp_clock_lock);
mutex_init(&lan966x->ptp_lock);
/* Disable master counters */
lan_wr(PTP_DOM_CFG_ENA_SET(0), lan966x, PTP_DOM_CFG);