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authorAlexandre Rames <arames@solarflare.com>2013-11-08 10:20:31 +0000
committerBen Hutchings <bhutchings@solarflare.com>2013-12-06 22:27:41 +0000
commit2ea4dc28a5bcec408e01a8772763871638a5ec79 (patch)
treebb96ff4fdc285aa0ae708b22d2d7d31da2b0b1a9
parent35f9a7a380728a94d417e5824a866f969423ac83 (diff)
downloadop-kernel-dev-2ea4dc28a5bcec408e01a8772763871638a5ec79.zip
op-kernel-dev-2ea4dc28a5bcec408e01a8772763871638a5ec79.tar.gz
sfc: Stop/re-start PTP when stopping/starting the datapath.
This disables PTP when we bring the interface down to avoid getting unmatched RX timestamp events, and tries to re-enable it when bringing the interface up. [bwh: Make efx_ptp_stop() safe on Falcon. Introduce efx_ptp_{start,stop}_datapath() functions; we'll expand them later.] Fixes: 7c236c43b838 ('sfc: Add support for IEEE-1588 PTP') Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
-rw-r--r--drivers/net/ethernet/sfc/efx.c4
-rw-r--r--drivers/net/ethernet/sfc/nic.h2
-rw-r--r--drivers/net/ethernet/sfc/ptp.c30
3 files changed, 33 insertions, 3 deletions
diff --git a/drivers/net/ethernet/sfc/efx.c b/drivers/net/ethernet/sfc/efx.c
index 2e27837..8bd5b485 100644
--- a/drivers/net/ethernet/sfc/efx.c
+++ b/drivers/net/ethernet/sfc/efx.c
@@ -645,6 +645,8 @@ static void efx_start_datapath(struct efx_nic *efx)
WARN_ON(channel->rx_pkt_n_frags);
}
+ efx_ptp_start_datapath(efx);
+
if (netif_device_present(efx->net_dev))
netif_tx_wake_all_queues(efx->net_dev);
}
@@ -659,6 +661,8 @@ static void efx_stop_datapath(struct efx_nic *efx)
EFX_ASSERT_RESET_SERIALISED(efx);
BUG_ON(efx->port_enabled);
+ efx_ptp_stop_datapath(efx);
+
/* Stop RX refill */
efx_for_each_channel(channel, efx) {
efx_for_each_channel_rx_queue(rx_queue, channel)
diff --git a/drivers/net/ethernet/sfc/nic.h b/drivers/net/ethernet/sfc/nic.h
index 11b6112..91c63ec7 100644
--- a/drivers/net/ethernet/sfc/nic.h
+++ b/drivers/net/ethernet/sfc/nic.h
@@ -560,6 +560,8 @@ void efx_ptp_get_ts_info(struct efx_nic *efx, struct ethtool_ts_info *ts_info);
bool efx_ptp_is_ptp_tx(struct efx_nic *efx, struct sk_buff *skb);
int efx_ptp_tx(struct efx_nic *efx, struct sk_buff *skb);
void efx_ptp_event(struct efx_nic *efx, efx_qword_t *ev);
+void efx_ptp_start_datapath(struct efx_nic *efx);
+void efx_ptp_stop_datapath(struct efx_nic *efx);
extern const struct efx_nic_type falcon_a1_nic_type;
extern const struct efx_nic_type falcon_b0_nic_type;
diff --git a/drivers/net/ethernet/sfc/ptp.c b/drivers/net/ethernet/sfc/ptp.c
index 8c665f1..9bd99ed 100644
--- a/drivers/net/ethernet/sfc/ptp.c
+++ b/drivers/net/ethernet/sfc/ptp.c
@@ -801,9 +801,14 @@ fail:
static int efx_ptp_stop(struct efx_nic *efx)
{
struct efx_ptp_data *ptp = efx->ptp_data;
- int rc = efx_ptp_disable(efx);
struct list_head *cursor;
struct list_head *next;
+ int rc;
+
+ if (ptp == NULL)
+ return 0;
+
+ rc = efx_ptp_disable(efx);
if (ptp->rxfilter_installed) {
efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED,
@@ -828,6 +833,13 @@ static int efx_ptp_stop(struct efx_nic *efx)
return rc;
}
+static int efx_ptp_restart(struct efx_nic *efx)
+{
+ if (efx->ptp_data && efx->ptp_data->enabled)
+ return efx_ptp_start(efx);
+ return 0;
+}
+
static void efx_ptp_pps_worker(struct work_struct *work)
{
struct efx_ptp_data *ptp =
@@ -1125,7 +1137,7 @@ static int efx_ptp_change_mode(struct efx_nic *efx, bool enable_wanted,
{
if ((enable_wanted != efx->ptp_data->enabled) ||
(enable_wanted && (efx->ptp_data->mode != new_mode))) {
- int rc;
+ int rc = 0;
if (enable_wanted) {
/* Change of mode requires disable */
@@ -1142,7 +1154,8 @@ static int efx_ptp_change_mode(struct efx_nic *efx, bool enable_wanted,
* succeed.
*/
efx->ptp_data->mode = new_mode;
- rc = efx_ptp_start(efx);
+ if (netif_running(efx->net_dev))
+ rc = efx_ptp_start(efx);
if (rc == 0) {
rc = efx_ptp_synchronize(efx,
PTP_SYNC_ATTEMPTS * 2);
@@ -1515,3 +1528,14 @@ void efx_ptp_probe(struct efx_nic *efx)
efx->extra_channel_type[EFX_EXTRA_CHANNEL_PTP] =
&efx_ptp_channel_type;
}
+
+void efx_ptp_start_datapath(struct efx_nic *efx)
+{
+ if (efx_ptp_restart(efx))
+ netif_err(efx, drv, efx->net_dev, "Failed to restart PTP.\n");
+}
+
+void efx_ptp_stop_datapath(struct efx_nic *efx)
+{
+ efx_ptp_stop(efx);
+}
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