tg3: PTP - Add the hardware timestamp ioctl

This patch implements the SIOCSHWTSTAMP ioctl as described in
Documentation/networking/timestamping.txt

[Removed HWTSTAMP_FILTER_ALL handling by returning -ERANGE based on input
 from Richard Cochran.]

Signed-off-by: Nithin Nayak Sujir <nsujir@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index 7b80031..a718a38 100644 (file)
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -12760,6 +12760,96 @@ 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)
+{
+       struct tg3 *tp = netdev_priv(dev);
+       struct hwtstamp_config stmpconf;
+
+       if (!tg3_flag(tp, PTP_CAPABLE))
+               return -EINVAL;
+
+       if (copy_from_user(&stmpconf, ifr->ifr_data, sizeof(stmpconf)))
+               return -EFAULT;
+
+       if (stmpconf.flags)
+               return -EINVAL;
+
+       switch (stmpconf.tx_type) {
+       case HWTSTAMP_TX_ON:
+               tg3_flag_set(tp, TX_TSTAMP_EN);
+               break;
+       case HWTSTAMP_TX_OFF:
+               tg3_flag_clear(tp, TX_TSTAMP_EN);
+               break;
+       default:
+               return -ERANGE;
+       }
+
+       switch (stmpconf.rx_filter) {
+       case HWTSTAMP_FILTER_NONE:
+               tp->rxptpctl = 0;
+               break;
+       case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
+               tp->rxptpctl = TG3_RX_PTP_CTL_RX_PTP_V1_EN |
+                              TG3_RX_PTP_CTL_ALL_V1_EVENTS;
+               break;
+       case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
+               tp->rxptpctl = TG3_RX_PTP_CTL_RX_PTP_V1_EN |
+                              TG3_RX_PTP_CTL_SYNC_EVNT;
+               break;
+       case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
+               tp->rxptpctl = TG3_RX_PTP_CTL_RX_PTP_V1_EN |
+                              TG3_RX_PTP_CTL_DELAY_REQ;
+               break;
+       case HWTSTAMP_FILTER_PTP_V2_EVENT:
+               tp->rxptpctl = TG3_RX_PTP_CTL_RX_PTP_V2_EN |
+                              TG3_RX_PTP_CTL_ALL_V2_EVENTS;
+               break;
+       case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
+               tp->rxptpctl = TG3_RX_PTP_CTL_RX_PTP_V2_L2_EN |
+                              TG3_RX_PTP_CTL_ALL_V2_EVENTS;
+               break;
+       case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
+               tp->rxptpctl = TG3_RX_PTP_CTL_RX_PTP_V2_L4_EN |
+                              TG3_RX_PTP_CTL_ALL_V2_EVENTS;
+               break;
+       case HWTSTAMP_FILTER_PTP_V2_SYNC:
+               tp->rxptpctl = TG3_RX_PTP_CTL_RX_PTP_V2_EN |
+                              TG3_RX_PTP_CTL_SYNC_EVNT;
+               break;
+       case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
+               tp->rxptpctl = TG3_RX_PTP_CTL_RX_PTP_V2_L2_EN |
+                              TG3_RX_PTP_CTL_SYNC_EVNT;
+               break;
+       case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
+               tp->rxptpctl = TG3_RX_PTP_CTL_RX_PTP_V2_L4_EN |
+                              TG3_RX_PTP_CTL_SYNC_EVNT;
+               break;
+       case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
+               tp->rxptpctl = TG3_RX_PTP_CTL_RX_PTP_V2_EN |
+                              TG3_RX_PTP_CTL_DELAY_REQ;
+               break;
+       case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
+               tp->rxptpctl = TG3_RX_PTP_CTL_RX_PTP_V2_L2_EN |
+                              TG3_RX_PTP_CTL_DELAY_REQ;
+               break;
+       case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
+               tp->rxptpctl = TG3_RX_PTP_CTL_RX_PTP_V2_L4_EN |
+                              TG3_RX_PTP_CTL_DELAY_REQ;
+               break;
+       default:
+               return -ERANGE;
+       }
+
+       if (netif_running(dev) && tp->rxptpctl)
+               tw32(TG3_RX_PTP_CTL,
+                    tp->rxptpctl | TG3_RX_PTP_CTL_HWTS_INTERLOCK);
+
+       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);
@@ -12810,6 +12900,9 @@ static int tg3_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 
                return err;
 
+       case SIOCSHWTSTAMP:
+               return tg3_hwtstamp_ioctl(dev, ifr, cmd);
+
        default:
                /* do nothing */
                break;