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taprio: Add support for setting flags 

This allows a new parameter, flags, to be passed to taprio. Currently, it
only supports enabling the txtime-assist mode. But, we plan to add
different modes for taprio (e.g. hardware offloading) and this parameter
will be useful in enabling those modes.

Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Signed-off-by: Vedang Patel <vedang.patel@intel.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
This commit is contained in:
Vinicius Costa Gomes 2019-07-18 12:55:40 -07:00 committed by David Ahern
parent d9114263d0
commit ee000bf217
1 changed files with 22 additions and 0 deletions
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22
tc/q_taprio.c
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@ -159,6 +159,7 @@ static int taprio_parse_opt(struct qdisc_util *qu, int argc,
__s64 cycle_time_extension = 0;
struct list_head sched_entries;
struct rtattr *tail, *l;
__u32 taprio_flags = 0;
__s64 cycle_time = 0;
__s64 base_time = 0;
int err, idx;
@ -281,6 +282,17 @@ static int taprio_parse_opt(struct qdisc_util *qu, int argc,
explain_clockid(*argv);
return -1;
}
} else if (strcmp(*argv, "flags") == 0) {
NEXT_ARG();
if (taprio_flags) {
fprintf(stderr, "taprio: duplicate \"flags\" specification\n");
return -1;
}
if (get_u32(&taprio_flags, *argv, 0)) {
PREV_ARG();
return -1;
}
} else if (strcmp(*argv, "help") == 0) {
explain();
return -1;
@ -297,6 +309,9 @@ static int taprio_parse_opt(struct qdisc_util *qu, int argc,
if (clockid != CLOCKID_INVALID)
addattr_l(n, 1024, TCA_TAPRIO_ATTR_SCHED_CLOCKID, &clockid, sizeof(clockid));
if (taprio_flags)
addattr_l(n, 1024, TCA_TAPRIO_ATTR_FLAGS, &taprio_flags, sizeof(taprio_flags));
if (opt.num_tc > 0)
addattr_l(n, 1024, TCA_TAPRIO_ATTR_PRIOMAP, &opt, sizeof(opt));
@ -442,6 +457,13 @@ static int taprio_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
print_string(PRINT_ANY, "clockid", "clockid %s", get_clock_name(clockid));
if (tb[TCA_TAPRIO_ATTR_FLAGS]) {
__u32 flags;
flags = rta_getattr_u32(tb[TCA_TAPRIO_ATTR_FLAGS]);
print_0xhex(PRINT_ANY, "flags", " flags %#x", flags);
}
print_schedule(f, tb);
if (tb[TCA_TAPRIO_ATTR_ADMIN_SCHED]) {