3.11.10.4 -stable review patch. If anyone has any objections, please let me
know.
------------------
From: Alexandre Rames <ara...@solarflare.com>
commit 2ea4dc28a5bcec408e01a8772763871638a5ec79 upstream.
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 <bhutchi...@solarflare.com>
[ luis: backported to 3.11:
- adjusted context
- added 'extern' to declarations in nic.h ]
Signed-off-by: Luis Henriques <luis.henriq...@canonical.com>
---
drivers/net/ethernet/sfc/efx.c | 4 ++++
drivers/net/ethernet/sfc/nic.h | 2 ++
drivers/net/ethernet/sfc/ptp.c | 30 +++++++++++++++++++++++++++---
3 files changed, 33 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/sfc/efx.c b/drivers/net/ethernet/sfc/efx.c
index c729688..b059ae8 100644
--- a/drivers/net/ethernet/sfc/efx.c
+++ b/drivers/net/ethernet/sfc/efx.c
@@ -695,6 +695,8 @@ 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);
}
@@ -710,6 +712,8 @@ static void efx_stop_datapath(struct efx_nic *efx)
EFX_ASSERT_RESET_SERIALISED(efx);
BUG_ON(efx->port_enabled);
+ efx_ptp_stop_datapath(efx);
+
/* Only perform flush if dma is enabled */
if (dev->is_busmaster && efx->state != STATE_RECOVERY) {
rc = efx_nic_flush_queues(efx);
diff --git a/drivers/net/ethernet/sfc/nic.h b/drivers/net/ethernet/sfc/nic.h
index d63c299..22bc2ac 100644
--- a/drivers/net/ethernet/sfc/nic.h
+++ b/drivers/net/ethernet/sfc/nic.h
@@ -259,6 +259,8 @@ extern void efx_ptp_get_ts_info(struct efx_nic *efx,
extern bool efx_ptp_is_ptp_tx(struct efx_nic *efx, struct sk_buff *skb);
extern int efx_ptp_tx(struct efx_nic *efx, struct sk_buff *skb);
extern void efx_ptp_event(struct efx_nic *efx, efx_qword_t *ev);
+extern void efx_ptp_start_datapath(struct efx_nic *efx);
+extern 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 e7d7010..b24d3be 100644
--- a/drivers/net/ethernet/sfc/ptp.c
+++ b/drivers/net/ethernet/sfc/ptp.c
@@ -794,9 +794,14 @@ 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,
@@ -821,6 +826,13 @@ 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 =
@@ -1118,7 +1130,7 @@ 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 */
@@ -1135,7 +1147,8 @@ 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);
@@ -1508,3 +1521,14 @@ 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);
+}
--
1.8.3.2
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