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ptp: Introduce strict checking of external time stamp options.

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User space may request time stamps on rising edges, falling edges, or
both.  However, the particular mode may or may not be supported in the
hardware or in the driver.  This patch adds a "strict" flag that tells
drivers to ensure that the requested mode will be honored.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Richard Cochran 2019-11-14 10:45:02 -08:00 committed by David S. Miller
parent 592025a03b
commit 6138e687c7
7 changed files with 15 additions and 6 deletions
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3
drivers/net/dsa/mv88e6xxx/ptp.c
View File

@ -276,7 +276,8 @@ static int mv88e6352_ptp_enable_extts(struct mv88e6xxx_chip *chip,
/* Reject requests with unsupported flags */
if (rq->extts.flags & ~(PTP_ENABLE_FEATURE |
PTP_RISING_EDGE |
PTP_FALLING_EDGE))
PTP_FALLING_EDGE |
PTP_STRICT_FLAGS))
return -EOPNOTSUPP;
pin = ptp_find_pin(chip->ptp_clock, PTP_PF_EXTTS, rq->extts.index);

3
drivers/net/ethernet/intel/igb/igb_ptp.c
View File

@ -524,7 +524,8 @@ static int igb_ptp_feature_enable_i210(struct ptp_clock_info *ptp,
/* Reject requests with unsupported flags */
if (rq->extts.flags & ~(PTP_ENABLE_FEATURE |
PTP_RISING_EDGE |
PTP_FALLING_EDGE))
PTP_FALLING_EDGE |
PTP_STRICT_FLAGS))
return -EOPNOTSUPP;
if (on) {

3
drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c
View File

@ -239,7 +239,8 @@ static int mlx5_extts_configure(struct ptp_clock_info *ptp,
/* Reject requests with unsupported flags */
if (rq->extts.flags & ~(PTP_ENABLE_FEATURE |
PTP_RISING_EDGE |
PTP_FALLING_EDGE))
PTP_FALLING_EDGE |
PTP_STRICT_FLAGS))
return -EOPNOTSUPP;
if (rq->extts.index >= clock->ptp_info.n_pins)

3
drivers/net/ethernet/renesas/ravb_ptp.c
View File

@ -185,7 +185,8 @@ static int ravb_ptp_extts(struct ptp_clock_info *ptp,
/* Reject requests with unsupported flags */
if (req->flags & ~(PTP_ENABLE_FEATURE |
PTP_RISING_EDGE |
PTP_FALLING_EDGE))
PTP_FALLING_EDGE |
PTP_STRICT_FLAGS))
return -EOPNOTSUPP;
if (req->index)

3
drivers/net/phy/dp83640.c
View File

@ -472,7 +472,8 @@ static int ptp_dp83640_enable(struct ptp_clock_info *ptp,
/* Reject requests with unsupported flags */
if (rq->extts.flags & ~(PTP_ENABLE_FEATURE |
PTP_RISING_EDGE |
PTP_FALLING_EDGE))
PTP_FALLING_EDGE |
PTP_STRICT_FLAGS))
return -EOPNOTSUPP;
index = rq->extts.index;
if (index >= N_EXT_TS)

2
drivers/ptp/ptp_chardev.c
View File

@ -150,6 +150,8 @@ long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg)
break;
}
if (cmd == PTP_EXTTS_REQUEST2) {
/* Tell the drivers to check the flags carefully. */
req.extts.flags |= PTP_STRICT_FLAGS;
/* Make sure no reserved bit is set. */
if ((req.extts.flags & ~PTP_EXTTS_VALID_FLAGS) ||
req.extts.rsv[0] || req.extts.rsv[1]) {

4
include/uapi/linux/ptp_clock.h
View File

@ -31,6 +31,7 @@
#define PTP_ENABLE_FEATURE (1<<0)
#define PTP_RISING_EDGE (1<<1)
#define PTP_FALLING_EDGE (1<<2)
#define PTP_STRICT_FLAGS (1<<3)
#define PTP_EXTTS_EDGES (PTP_RISING_EDGE | PTP_FALLING_EDGE)
/*
@ -38,7 +39,8 @@
*/
#define PTP_EXTTS_VALID_FLAGS (PTP_ENABLE_FEATURE | \
PTP_RISING_EDGE | \
PTP_FALLING_EDGE)
PTP_FALLING_EDGE | \
PTP_STRICT_FLAGS)
/*
* flag fields valid for the original PTP_EXTTS_REQUEST ioctl.