ixgbe: Add function for obtaining FCoE TC based on FCoE user priority

[deliverable/linux.git] / drivers / net / ethernet / intel / ixgbe / ixgbe_ptp.c

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c
index cb7d1b2982c5a70cfcc021734ef0cdc808380314..3456d56171437cfbab401c39e3db6ad08c153782 100644 (file)
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c
@@ -107,7 +107,7 @@ static struct sock_filter ptp_filter[] = {
 
 /**
  * ixgbe_ptp_read - read raw cycle counter (to be used by time counter)
- * @cc - the cyclecounter structure
+ * @cc: the cyclecounter structure
  *
  * this function reads the cyclecounter registers and is called by the
  * cyclecounter structure used to construct a ns counter from the
@@ -128,8 +128,8 @@ static cycle_t ixgbe_ptp_read(const struct cyclecounter *cc)
 
 /**
  * ixgbe_ptp_adjfreq
- * @ptp - the ptp clock structure
- * @ppb - parts per billion adjustment from base
+ * @ptp: the ptp clock structure
+ * @ppb: parts per billion adjustment from base
  *
  * adjust the frequency of the ptp cycle counter by the
  * indicated ppb from the base frequency.
@@ -175,8 +175,8 @@ static int ixgbe_ptp_adjfreq(struct ptp_clock_info *ptp, s32 ppb)
 
 /**
  * ixgbe_ptp_adjtime
- * @ptp - the ptp clock structure
- * @delta - offset to adjust the cycle counter by
+ * @ptp: the ptp clock structure
+ * @delta: offset to adjust the cycle counter by
  *
  * adjust the timer by resetting the timecounter structure.
  */
@@ -203,8 +203,8 @@ static int ixgbe_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta)
 
 /**
  * ixgbe_ptp_gettime
- * @ptp - the ptp clock structure
- * @ts - timespec structure to hold the current time value
+ * @ptp: the ptp clock structure
+ * @ts: timespec structure to hold the current time value
  *
  * read the timecounter and return the correct value on ns,
  * after converting it into a struct timespec.
@@ -229,8 +229,8 @@ static int ixgbe_ptp_gettime(struct ptp_clock_info *ptp, struct timespec *ts)
 
 /**
  * ixgbe_ptp_settime
- * @ptp - the ptp clock structure
- * @ts - the timespec containing the new time for the cycle counter
+ * @ptp: the ptp clock structure
+ * @ts: the timespec containing the new time for the cycle counter
  *
  * reset the timecounter to use a new base value instead of the kernel
  * wall timer value.
@@ -256,9 +256,9 @@ static int ixgbe_ptp_settime(struct ptp_clock_info *ptp,
 
 /**
  * ixgbe_ptp_enable
- * @ptp - the ptp clock structure
- * @rq - the requested feature to change
- * @on - whether to enable or disable the feature
+ * @ptp: the ptp clock structure
+ * @rq: the requested feature to change
+ * @on: whether to enable or disable the feature
  *
  * enable (or disable) ancillary features of the phc subsystem.
  * our driver only supports the PPS feature on the X540
@@ -294,8 +294,8 @@ static int ixgbe_ptp_enable(struct ptp_clock_info *ptp,
 
 /**
  * ixgbe_ptp_check_pps_event
- * @adapter - the private adapter structure
- * @eicr - the interrupt cause register value
+ * @adapter: the private adapter structure
+ * @eicr: the interrupt cause register value
  *
  * This function is called by the interrupt routine when checking for
  * interrupts. It will check and handle a pps event.
@@ -325,8 +325,8 @@ void ixgbe_ptp_check_pps_event(struct ixgbe_adapter *adapter, u32 eicr)
 
 /**
  * ixgbe_ptp_enable_sdp
- * @hw - the hardware private structure
- * @shift - the clock shift for calculating nanoseconds
+ * @hw: the hardware private structure
+ * @shift: the clock shift for calculating nanoseconds
  *
  * this function enables the clock out feature on the sdp0 for the
  * X540 device. It will create a 1second periodic output that can be
@@ -399,7 +399,7 @@ static void ixgbe_ptp_enable_sdp(struct ixgbe_hw *hw, int shift)
 
 /**
  * ixgbe_ptp_disable_sdp
- * @hw - the private hardware structure
+ * @hw: the private hardware structure
  *
  * this function disables the auxiliary SDP clock out feature
  */
@@ -769,7 +769,7 @@ int ixgbe_ptp_hwtstamp_ioctl(struct ixgbe_adapter *adapter,
 
 /**
  * ixgbe_ptp_start_cyclecounter - create the cycle counter from hw
- * @adapter - pointer to the adapter structure
+ * @adapter: pointer to the adapter structure
  *
  * this function initializes the timecounter and cyclecounter
  * structures for use in generated a ns counter from the arbitrary
@@ -787,6 +787,7 @@ void ixgbe_ptp_start_cyclecounter(struct ixgbe_adapter *adapter)
 {
        struct ixgbe_hw *hw = &adapter->hw;
        u32 incval = 0;
+       u32 timinca = 0;
        u32 shift = 0;
        u32 cycle_speed;
        unsigned long flags;
@@ -809,8 +810,16 @@ void ixgbe_ptp_start_cyclecounter(struct ixgbe_adapter *adapter)
                break;
        }
 
-       /* Bail if the cycle speed didn't change */
-       if (adapter->cycle_speed == cycle_speed)
+       /*
+        * grab the current TIMINCA value from the register so that it can be
+        * double checked. If the register value has been cleared, it must be
+        * reset to the correct value for generating a cyclecounter. If
+        * TIMINCA is zero, the SYSTIME registers do not increment at all.
+        */
+       timinca = IXGBE_READ_REG(hw, IXGBE_TIMINCA);
+
+       /* Bail if the cycle speed didn't change and TIMINCA is non-zero */
+       if (adapter->cycle_speed == cycle_speed && timinca)
                return;
 
        /* disable the SDP clock out */
@@ -896,7 +905,7 @@ void ixgbe_ptp_start_cyclecounter(struct ixgbe_adapter *adapter)
 
 /**
  * ixgbe_ptp_init
- * @adapter - the ixgbe private adapter structure
+ * @adapter: the ixgbe private adapter structure
  *
  * This function performs the required steps for enabling ptp
  * support. If ptp support has already been loaded it simply calls the