diff options
| -rw-r--r-- | cpukit/score/src/kern_tc.c | 41 |
1 files changed, 36 insertions, 5 deletions
diff --git a/cpukit/score/src/kern_tc.c b/cpukit/score/src/kern_tc.c index a0f5ee68b1..654703dd4b 100644 --- a/cpukit/score/src/kern_tc.c +++ b/cpukit/score/src/kern_tc.c @@ -36,7 +36,7 @@ #include <rtems/score/watchdogimpl.h> #endif /* __rtems__ */ #include <sys/cdefs.h> -__FBSDID("$FreeBSD r280012 2015-03-14T23:16:12Z$"); +__FBSDID("$FreeBSD r282424 2015-05-04T17:59:39Z$"); #include "opt_compat.h" #include "opt_ntp.h" @@ -1574,6 +1574,17 @@ SYSCTL_PROC(_kern_timecounter, OID_AUTO, choice, CTLTYPE_STRING | CTLFLAG_RD, * RFC 2783 PPS-API implementation. */ +/* + * Return true if the driver is aware of the abi version extensions in the + * pps_state structure, and it supports at least the given abi version number. + */ +static inline int +abi_aware(struct pps_state *pps, int vers) +{ + + return ((pps->kcmode & KCMODE_ABIFLAG) && pps->driver_abi >= vers); +} + static int pps_fetch(struct pps_fetch_args *fapi, struct pps_state *pps) { @@ -1603,10 +1614,17 @@ pps_fetch(struct pps_fetch_args *fapi, struct pps_state *pps) cseq = pps->ppsinfo.clear_sequence; while (aseq == pps->ppsinfo.assert_sequence && cseq == pps->ppsinfo.clear_sequence) { - if (pps->mtx != NULL) - err = msleep(pps, pps->mtx, PCATCH, "ppsfch", timo); - else + if (abi_aware(pps, 1) && pps->driver_mtx != NULL) { + if (pps->flags & PPSFLAG_MTX_SPIN) { + err = msleep_spin(pps, pps->driver_mtx, + "ppsfch", timo); + } else { + err = msleep(pps, pps->driver_mtx, PCATCH, + "ppsfch", timo); + } + } else { err = tsleep(pps, PCATCH, "ppsfch", timo); + } if (err == EWOULDBLOCK && fapi->timeout.tv_sec == -1) { continue; } else if (err != 0) { @@ -1696,7 +1714,8 @@ pps_ioctl(u_long cmd, caddr_t data, struct pps_state *pps) return (EINVAL); if (kapi->edge & ~pps->ppscap) return (EINVAL); - pps->kcmode = kapi->edge; + pps->kcmode = (kapi->edge & KCMODE_EDGEMASK) | + (pps->kcmode & KCMODE_ABIFLAG); return (0); #else return (EOPNOTSUPP); @@ -1717,6 +1736,18 @@ pps_init(struct pps_state *pps) #ifdef FFCLOCK pps->ppscap |= PPS_TSCLK_MASK; #endif + pps->kcmode &= ~KCMODE_ABIFLAG; +} + +void +pps_init_abi(struct pps_state *pps) +{ + + pps_init(pps); + if (pps->driver_abi > 0) { + pps->kcmode |= KCMODE_ABIFLAG; + pps->kernel_abi = PPS_ABI_VERSION; + } } void |