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i40e: extend PTP gettime function to read system clock 

This adds support for the PTP_SYS_OFFSET_EXTENDED ioctl.

Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Acked-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Miroslav Lichvar 2018-11-28 17:07:49 +01:00 committed by Jeff Kirsher
parent 31389b53b3
commit 9a2d57a7a0
1 changed files with 12 additions and 6 deletions
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18
drivers/net/ethernet/intel/i40e/i40e_ptp.c
View File

@ -28,19 +28,23 @@
* i40e_ptp_read - Read the PHC time from the device
* @pf: Board private structure
* @ts: timespec structure to hold the current time value
* @sts: structure to hold the system time before and after reading the PHC
*
* This function reads the PRTTSYN_TIME registers and stores them in a
* timespec. However, since the registers are 64 bits of nanoseconds, we must
* convert the result to a timespec before we can return.
**/
static void i40e_ptp_read(struct i40e_pf *pf, struct timespec64 *ts)
static void i40e_ptp_read(struct i40e_pf *pf, struct timespec64 *ts,
struct ptp_system_timestamp *sts)
{
struct i40e_hw *hw = &pf->hw;
u32 hi, lo;
u64 ns;
/* The timer latches on the lowest register read. */
ptp_read_system_prets(sts);
lo = rd32(hw, I40E_PRTTSYN_TIME_L);
ptp_read_system_postts(sts);
hi = rd32(hw, I40E_PRTTSYN_TIME_H);
ns = (((u64)hi) << 32) | lo;
@ -146,7 +150,7 @@ static int i40e_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta)
mutex_lock(&pf->tmreg_lock);
i40e_ptp_read(pf, &now);
i40e_ptp_read(pf, &now, NULL);
timespec64_add_ns(&now, delta);
i40e_ptp_write(pf, (const struct timespec64 *)&now);
@ -156,19 +160,21 @@ static int i40e_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta)
}
/**
* i40e_ptp_gettime - Get the time of the PHC
* i40e_ptp_gettimex - Get the time of the PHC
* @ptp: The PTP clock structure
* @ts: timespec structure to hold the current time value
* @sts: structure to hold the system time before and after reading the PHC
*
* Read the device clock and return the correct value on ns, after converting it
* into a timespec struct.
**/
static int i40e_ptp_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts)
static int i40e_ptp_gettimex(struct ptp_clock_info *ptp, struct timespec64 *ts,
struct ptp_system_timestamp *sts)
{
struct i40e_pf *pf = container_of(ptp, struct i40e_pf, ptp_caps);
mutex_lock(&pf->tmreg_lock);
i40e_ptp_read(pf, ts);
i40e_ptp_read(pf, ts, sts);
mutex_unlock(&pf->tmreg_lock);
return 0;
@ -702,7 +708,7 @@ static long i40e_ptp_create_clock(struct i40e_pf *pf)
pf->ptp_caps.pps = 0;
pf->ptp_caps.adjfreq = i40e_ptp_adjfreq;
pf->ptp_caps.adjtime = i40e_ptp_adjtime;
pf->ptp_caps.gettime64 = i40e_ptp_gettime;
pf->ptp_caps.gettimex64 = i40e_ptp_gettimex;
pf->ptp_caps.settime64 = i40e_ptp_settime;
pf->ptp_caps.enable = i40e_ptp_feature_enable;