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taprio: add support for setting txtime_delay.

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This adds support for setting the txtime_delay parameter which is useful
for the txtime offload mode of taprio.

Signed-off-by: Vedang Patel <vedang.patel@intel.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
This commit is contained in:
Vedang Patel 2019-07-18 12:55:41 -07:00 committed by David Ahern
parent ee000bf217
commit a5e6ee3b34
1 changed files with 23 additions and 1 deletions
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24
tc/q_taprio.c
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@ -52,7 +52,7 @@ static void explain(void)
" [num_tc NUMBER] [map P0 P1 ...] "
" [queues COUNT@OFFSET COUNT@OFFSET COUNT@OFFSET ...] "
" [ [sched-entry index cmd gate-mask interval] ... ] "
" [base-time time] "
" [base-time time] [txtime-delay delay]"
"\n"
"CLOCKID must be a valid SYS-V id (i.e. CLOCK_TAI)\n");
}
@ -160,6 +160,7 @@ static int taprio_parse_opt(struct qdisc_util *qu, int argc,
struct list_head sched_entries;
struct rtattr *tail, *l;
__u32 taprio_flags = 0;
__u32 txtime_delay = 0;
__s64 cycle_time = 0;
__s64 base_time = 0;
int err, idx;
@ -293,6 +294,17 @@ static int taprio_parse_opt(struct qdisc_util *qu, int argc,
return -1;
}
} else if (strcmp(*argv, "txtime-delay") == 0) {
NEXT_ARG();
if (txtime_delay != 0) {
fprintf(stderr, "taprio: duplicate \"txtime-delay\" specification\n");
return -1;
}
if (get_u32(&txtime_delay, *argv, 0)) {
PREV_ARG();
return -1;
}
} else if (strcmp(*argv, "help") == 0) {
explain();
return -1;
@ -315,6 +327,9 @@ static int taprio_parse_opt(struct qdisc_util *qu, int argc,
if (opt.num_tc > 0)
addattr_l(n, 1024, TCA_TAPRIO_ATTR_PRIOMAP, &opt, sizeof(opt));
if (txtime_delay)
addattr_l(n, 1024, TCA_TAPRIO_ATTR_TXTIME_DELAY, &txtime_delay, sizeof(txtime_delay));
if (base_time)
addattr_l(n, 1024, TCA_TAPRIO_ATTR_SCHED_BASE_TIME, &base_time, sizeof(base_time));
@ -464,6 +479,13 @@ static int taprio_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
print_0xhex(PRINT_ANY, "flags", " flags %#x", flags);
}
if (tb[TCA_TAPRIO_ATTR_TXTIME_DELAY]) {
__u32 txtime_delay;
txtime_delay = rta_getattr_s32(tb[TCA_TAPRIO_ATTR_TXTIME_DELAY]);
print_uint(PRINT_ANY, "txtime_delay", " txtime delay %d", txtime_delay);
}
print_schedule(f, tb);
if (tb[TCA_TAPRIO_ATTR_ADMIN_SCHED]) {