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net: dsa: microchip: ptp: Initial hardware time stamping support

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This patch adds the routine for get_ts_info, hwstamp_get, set. This enables
the PTP support towards userspace applications such as linuxptp.

Signed-off-by: Christian Eggers <ceggers@arri.de>
Co-developed-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Christian Eggers 2023-01-10 14:19:19 +05:30 committed by David S. Miller
parent eac1ea2026
commit c59e12a140
4 changed files with 118 additions and 0 deletions
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3
drivers/net/dsa/microchip/ksz_common.c
View File

@ -2977,6 +2977,9 @@ static const struct dsa_switch_ops ksz_switch_ops = {
.get_pause_stats = ksz_get_pause_stats,
.port_change_mtu = ksz_change_mtu,
.port_max_mtu = ksz_max_mtu,
.get_ts_info = ksz_get_ts_info,
.port_hwtstamp_get = ksz_hwtstamp_get,
.port_hwtstamp_set = ksz_hwtstamp_set,
};
struct ksz_device *ksz_switch_alloc(struct device *base, void *priv)

3
drivers/net/dsa/microchip/ksz_common.h
View File

@ -102,6 +102,9 @@ struct ksz_port {
struct ksz_device *ksz_dev;
struct ksz_irq pirq;
u8 num;
#if IS_ENABLED(CONFIG_NET_DSA_MICROCHIP_KSZ_PTP)
struct hwtstamp_config tstamp_config;
#endif
};
struct ksz_device {

101
drivers/net/dsa/microchip/ksz_ptp.c
View File

@ -24,6 +24,107 @@
#define KSZ_PTP_INC_NS 40ULL /* HW clock is incremented every 40 ns (by 40) */
#define KSZ_PTP_SUBNS_BITS 32
/* The function is return back the capability of timestamping feature when
* requested through ethtool -T <interface> utility
*/
int ksz_get_ts_info(struct dsa_switch *ds, int port, struct ethtool_ts_info *ts)
{
struct ksz_device *dev = ds->priv;
struct ksz_ptp_data *ptp_data;
ptp_data = &dev->ptp_data;
if (!ptp_data->clock)
return -ENODEV;
ts->so_timestamping = SOF_TIMESTAMPING_TX_HARDWARE |
SOF_TIMESTAMPING_RX_HARDWARE |
SOF_TIMESTAMPING_RAW_HARDWARE;
ts->tx_types = BIT(HWTSTAMP_TX_OFF) | BIT(HWTSTAMP_TX_ONESTEP_P2P);
ts->rx_filters = BIT(HWTSTAMP_FILTER_NONE) |
BIT(HWTSTAMP_FILTER_PTP_V2_L4_EVENT) |
BIT(HWTSTAMP_FILTER_PTP_V2_L2_EVENT) |
BIT(HWTSTAMP_FILTER_PTP_V2_EVENT);
ts->phc_index = ptp_clock_index(ptp_data->clock);
return 0;
}
int ksz_hwtstamp_get(struct dsa_switch *ds, int port, struct ifreq *ifr)
{
struct ksz_device *dev = ds->priv;
struct hwtstamp_config *config;
struct ksz_port *prt;
prt = &dev->ports[port];
config = &prt->tstamp_config;
return copy_to_user(ifr->ifr_data, config, sizeof(*config)) ?
-EFAULT : 0;
}
static int ksz_set_hwtstamp_config(struct ksz_device *dev,
struct hwtstamp_config *config)
{
if (config->flags)
return -EINVAL;
switch (config->tx_type) {
case HWTSTAMP_TX_OFF:
case HWTSTAMP_TX_ONESTEP_P2P:
break;
default:
return -ERANGE;
}
switch (config->rx_filter) {
case HWTSTAMP_FILTER_NONE:
break;
case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
config->rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_EVENT;
break;
case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
config->rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT;
break;
case HWTSTAMP_FILTER_PTP_V2_EVENT:
case HWTSTAMP_FILTER_PTP_V2_SYNC:
config->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
break;
default:
config->rx_filter = HWTSTAMP_FILTER_NONE;
return -ERANGE;
}
return 0;
}
int ksz_hwtstamp_set(struct dsa_switch *ds, int port, struct ifreq *ifr)
{
struct ksz_device *dev = ds->priv;
struct hwtstamp_config config;
struct ksz_port *prt;
int ret;
prt = &dev->ports[port];
ret = copy_from_user(&config, ifr->ifr_data, sizeof(config));
if (ret)
return ret;
ret = ksz_set_hwtstamp_config(dev, &config);
if (ret)
return ret;
memcpy(&prt->tstamp_config, &config, sizeof(config));
return copy_to_user(ifr->ifr_data, &config, sizeof(config));
}
static int _ksz_ptp_gettime(struct ksz_device *dev, struct timespec64 *ts)
{
u32 nanoseconds;

11
drivers/net/dsa/microchip/ksz_ptp.h
View File

@ -23,6 +23,11 @@ int ksz_ptp_clock_register(struct dsa_switch *ds);
void ksz_ptp_clock_unregister(struct dsa_switch *ds);
int ksz_get_ts_info(struct dsa_switch *ds, int port,
struct ethtool_ts_info *ts);
int ksz_hwtstamp_get(struct dsa_switch *ds, int port, struct ifreq *ifr);
int ksz_hwtstamp_set(struct dsa_switch *ds, int port, struct ifreq *ifr);
#else
struct ksz_ptp_data {
@ -37,6 +42,12 @@ static inline int ksz_ptp_clock_register(struct dsa_switch *ds)
static inline void ksz_ptp_clock_unregister(struct dsa_switch *ds) { }
#define ksz_get_ts_info NULL
#define ksz_hwtstamp_get NULL
#define ksz_hwtstamp_set NULL
#endif /* End of CONFIG_NET_DSA_MICROCHIP_KSZ_PTP */
#endif