diff options
| author | Matthew Vick <matthew.vick@intel.com> | 2012-12-13 07:20:35 +0000 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2013-01-18 04:58:09 -0800 |
| commit | fc5807511699787f69b202d0382eb9f11e1da412 (patch) | |
| tree | 77075a4d7b3c6ed23a7f32a2d8142e8f92e6d9aa /drivers/net/ethernet/intel/igb/igb.h | |
| parent | 428f1f715131ea5ae32e29502541ce007f556b5b (diff) | |
| download | op-kernel-dev-fc5807511699787f69b202d0382eb9f11e1da412.zip op-kernel-dev-fc5807511699787f69b202d0382eb9f11e1da412.tar.gz | |
igb: Add mechanism for detecting latched hardware Rx timestamp
Add a check against possible Rx timestamp freezing in the hardware via
watchdog mechanism. This situation can occur when an Rx timestamp has been
latched, but the packet has been dropped because the Rx ring is full.
Whenever a packet comes in that should be timestamped, the Rx timestamp
gets latched into the hardware registers and we will store the jiffy value
in the rx_ring. The watchdog will keep track of his own jiffy timer
whenever there is no valid timestamp in the registers.
If the watchdog detects a valid timestamp in the registers, meaning that no
Rx packet has consumed it yet, it will check which time is most recent: the
last time in the watchdog or any time in the rx_rings. If the most recent
"event" was more than 5 seconds ago, it will flush the Rx timestamp and
print a warning message to the syslog.
Cc: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: Matthew Vick <matthew.vick@intel.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Acked-by: Jacob Keller <Jacob.e.keller@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/igb/igb.h')
| -rw-r--r-- | drivers/net/ethernet/intel/igb/igb.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/igb/igb.h b/drivers/net/ethernet/intel/igb/igb.h index 8c6f59d..ad317ab 100644 --- a/drivers/net/ethernet/intel/igb/igb.h +++ b/drivers/net/ethernet/intel/igb/igb.h @@ -221,6 +221,7 @@ struct igb_ring { struct igb_tx_buffer *tx_buffer_info; struct igb_rx_buffer *rx_buffer_info; }; + unsigned long last_rx_timestamp; void *desc; /* descriptor ring memory */ unsigned long flags; /* ring specific flags */ void __iomem *tail; /* pointer to ring tail register */ @@ -415,10 +416,12 @@ struct igb_adapter { struct work_struct ptp_tx_work; struct sk_buff *ptp_tx_skb; unsigned long ptp_tx_start; + unsigned long last_rx_ptp_check; spinlock_t tmreg_lock; struct cyclecounter cc; struct timecounter tc; u32 tx_hwtstamp_timeouts; + u32 rx_hwtstamp_cleared; char fw_version[32]; #ifdef CONFIG_IGB_HWMON @@ -486,6 +489,7 @@ extern void igb_ptp_init(struct igb_adapter *adapter); extern void igb_ptp_stop(struct igb_adapter *adapter); extern void igb_ptp_reset(struct igb_adapter *adapter); extern void igb_ptp_tx_work(struct work_struct *work); +extern void igb_ptp_rx_hang(struct igb_adapter *adapter); extern void igb_ptp_tx_hwtstamp(struct igb_adapter *adapter); extern void igb_ptp_rx_rgtstamp(struct igb_q_vector *q_vector, struct sk_buff *skb); |
