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ixgbe: implement SIOCGHWTSTAMP ioctl 

This patch adds support for the new SIOCGHWTSTAMP ioctl, which enables a
process to determine the current timestamp configuration. In order to
implement this, store a copy of the timestamp configuration. In
addition, we can remove the 'int cmd' parameter as the new set_ts_config
function doesn't use it. I also fixed a typo in the function
description.

-v2
* Only save the settings after validating them

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jacob Keller 2014-02-28 15:48:58 -08:00 committed by David S. Miller
parent 144384649d
commit 93501d48b8
3 changed files with 24 additions and 8 deletions
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5
drivers/net/ethernet/intel/ixgbe/ixgbe.h
View File

@ -765,6 +765,7 @@ struct ixgbe_adapter {
struct ptp_clock_info ptp_caps;
struct work_struct ptp_tx_work;
struct sk_buff *ptp_tx_skb;
struct hwtstamp_config tstamp_config;
unsigned long ptp_tx_start;
unsigned long last_overflow_check;
unsigned long last_rx_ptp_check;
@ -957,8 +958,8 @@ static inline void ixgbe_ptp_rx_hwtstamp(struct ixgbe_ring *rx_ring,
rx_ring->last_rx_timestamp = jiffies;
}
int ixgbe_ptp_hwtstamp_ioctl(struct ixgbe_adapter *adapter, struct ifreq *ifr,
int cmd);
int ixgbe_ptp_set_ts_config(struct ixgbe_adapter *adapter, struct ifreq *ifr);
int ixgbe_ptp_get_ts_config(struct ixgbe_adapter *adapter, struct ifreq *ifr);
void ixgbe_ptp_start_cyclecounter(struct ixgbe_adapter *adapter);
void ixgbe_ptp_reset(struct ixgbe_adapter *adapter);
void ixgbe_ptp_check_pps_event(struct ixgbe_adapter *adapter, u32 eicr);

4
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
View File

@ -7197,7 +7197,9 @@ static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
switch (cmd) {
case SIOCSHWTSTAMP:
return ixgbe_ptp_hwtstamp_ioctl(adapter, req, cmd);
return ixgbe_ptp_set_ts_config(adapter, req);
case SIOCGHWTSTAMP:
return ixgbe_ptp_get_ts_config(adapter, req);
default:
return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
}

23
drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c
View File

@ -576,14 +576,21 @@ void __ixgbe_ptp_rx_hwtstamp(struct ixgbe_q_vector *q_vector,
shhwtstamps->hwtstamp = ns_to_ktime(ns);
}
int ixgbe_ptp_get_ts_config(struct ixgbe_adapter *adapter, struct ifreq *ifr)
{
struct hwtstamp_config *config = &adapter->tstamp_config;
return copy_to_user(ifr->ifr_data, config,
sizeof(*config)) ? -EFAULT : 0;
}
/**
* ixgbe_ptp_hwtstamp_ioctl - control hardware time stamping
* ixgbe_ptp_set_ts_config - control hardware time stamping
* @adapter: pointer to adapter struct
* @ifreq: ioctl data
* @cmd: particular ioctl requested
*
* Outgoing time stamping can be enabled and disabled. Play nice and
* disable it when requested, although it shouldn't case any overhead
* disable it when requested, although it shouldn't cause any overhead
* when no packet needs it. At most one packet in the queue may be
* marked for time stamping, otherwise it would be impossible to tell
* for sure to which packet the hardware time stamp belongs.
@ -599,8 +606,7 @@ void __ixgbe_ptp_rx_hwtstamp(struct ixgbe_q_vector *q_vector,
* Event mode. This more accurately tells the user what the hardware is going
* to do anyways.
*/
int ixgbe_ptp_hwtstamp_ioctl(struct ixgbe_adapter *adapter,
struct ifreq *ifr, int cmd)
int ixgbe_ptp_set_ts_config(struct ixgbe_adapter *adapter, struct ifreq *ifr)
{
struct ixgbe_hw *hw = &adapter->hw;
struct hwtstamp_config config;
@ -702,6 +708,10 @@ int ixgbe_ptp_hwtstamp_ioctl(struct ixgbe_adapter *adapter,
regval = IXGBE_READ_REG(hw, IXGBE_TXSTMPH);
regval = IXGBE_READ_REG(hw, IXGBE_RXSTMPH);
/* save these settings for future reference */
memcpy(&adapter->tstamp_config, &config,
sizeof(adapter->tstamp_config));
return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ?
-EFAULT : 0;
}
@ -809,6 +819,9 @@ void ixgbe_ptp_reset(struct ixgbe_adapter *adapter)
IXGBE_WRITE_REG(hw, IXGBE_SYSTIMH, 0x00000000);
IXGBE_WRITE_FLUSH(hw);
/* Reset the saved tstamp_config */
memset(&adapter->tstamp_config, 0, sizeof(adapter->tstamp_config));
ixgbe_ptp_start_cyclecounter(adapter);
spin_lock_irqsave(&adapter->tmreg_lock, flags);