tg3: Implement the SIOCGHWTSTAMP ioctl

While we're doing this, fix the error code for SIOCSHWTSTAMP ioctl on
non-timestamping hardware.

Compile-tested only.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index a9e0684..539c6ac 100644 (file)
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -13603,14 +13603,13 @@ static void tg3_self_test(struct net_device *dev, struct ethtool_test *etest,
 
 }
 
-static int tg3_hwtstamp_ioctl(struct net_device *dev,
-                             struct ifreq *ifr, int cmd)
+static int tg3_hwtstamp_set(struct net_device *dev, struct ifreq *ifr)
 {
        struct tg3 *tp = netdev_priv(dev);
        struct hwtstamp_config stmpconf;
 
        if (!tg3_flag(tp, PTP_CAPABLE))
-               return -EINVAL;
+               return -EOPNOTSUPP;
 
        if (copy_from_user(&stmpconf, ifr->ifr_data, sizeof(stmpconf)))
                return -EFAULT;
@@ -13691,6 +13690,67 @@ static int tg3_hwtstamp_ioctl(struct net_device *dev,
                -EFAULT : 0;
 }
 
+static int tg3_hwtstamp_get(struct net_device *dev, struct ifreq *ifr)
+{
+       struct tg3 *tp = netdev_priv(dev);
+       struct hwtstamp_config stmpconf;
+
+       if (!tg3_flag(tp, PTP_CAPABLE))
+               return -EOPNOTSUPP;
+
+       stmpconf.flags = 0;
+       stmpconf.tx_type = (tg3_flag(tp, TX_TSTAMP_EN) ?
+                           HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF);
+
+       switch (tp->rxptpctl) {
+       case 0:
+               stmpconf.rx_filter = HWTSTAMP_FILTER_NONE;
+               break;
+       case TG3_RX_PTP_CTL_RX_PTP_V1_EN | TG3_RX_PTP_CTL_ALL_V1_EVENTS:
+               stmpconf.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT;
+               break;
+       case TG3_RX_PTP_CTL_RX_PTP_V1_EN | TG3_RX_PTP_CTL_SYNC_EVNT:
+               stmpconf.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_SYNC;
+               break;
+       case TG3_RX_PTP_CTL_RX_PTP_V1_EN | TG3_RX_PTP_CTL_DELAY_REQ:
+               stmpconf.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ;
+               break;
+       case TG3_RX_PTP_CTL_RX_PTP_V2_EN | TG3_RX_PTP_CTL_ALL_V2_EVENTS:
+               stmpconf.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
+               break;
+       case TG3_RX_PTP_CTL_RX_PTP_V2_L2_EN | TG3_RX_PTP_CTL_ALL_V2_EVENTS:
+               stmpconf.rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT;
+               break;
+       case TG3_RX_PTP_CTL_RX_PTP_V2_L4_EN | TG3_RX_PTP_CTL_ALL_V2_EVENTS:
+               stmpconf.rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_EVENT;
+               break;
+       case TG3_RX_PTP_CTL_RX_PTP_V2_EN | TG3_RX_PTP_CTL_SYNC_EVNT:
+               stmpconf.rx_filter = HWTSTAMP_FILTER_PTP_V2_SYNC;
+               break;
+       case TG3_RX_PTP_CTL_RX_PTP_V2_L2_EN | TG3_RX_PTP_CTL_SYNC_EVNT:
+               stmpconf.rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_SYNC;
+               break;
+       case TG3_RX_PTP_CTL_RX_PTP_V2_L4_EN | TG3_RX_PTP_CTL_SYNC_EVNT:
+               stmpconf.rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_SYNC;
+               break;
+       case TG3_RX_PTP_CTL_RX_PTP_V2_EN | TG3_RX_PTP_CTL_DELAY_REQ:
+               stmpconf.rx_filter = HWTSTAMP_FILTER_PTP_V2_DELAY_REQ;
+               break;
+       case TG3_RX_PTP_CTL_RX_PTP_V2_L2_EN | TG3_RX_PTP_CTL_DELAY_REQ:
+               stmpconf.rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ;
+               break;
+       case TG3_RX_PTP_CTL_RX_PTP_V2_L4_EN | TG3_RX_PTP_CTL_DELAY_REQ:
+               stmpconf.rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ;
+               break;
+       default:
+               WARN_ON_ONCE(1);
+               return -ERANGE;
+       }
+
+       return copy_to_user(ifr->ifr_data, &stmpconf, sizeof(stmpconf)) ?
+               -EFAULT : 0;
+}
+
 static int tg3_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 {
        struct mii_ioctl_data *data = if_mii(ifr);
@@ -13744,7 +13804,10 @@ static int tg3_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
                return err;
 
        case SIOCSHWTSTAMP:
-               return tg3_hwtstamp_ioctl(dev, ifr, cmd);
+               return tg3_hwtstamp_set(dev, ifr);
+
+       case SIOCGHWTSTAMP:
+               return tg3_hwtstamp_get(dev, ifr);
 
        default:
                /* do nothing */