diff options
| author |   Vedang Patel <vedang.patel@intel.com> | 2019-06-25 15:07:18 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-06-28 14:45:34 -0700 |
| commit | 7ede7b03484bbb035aa5be98c45a40cfabdc0738 (patch) | |
| tree | 8db284a5996d1a32ee31acc670578e7dd676d32e /net/sched | |
| parent | taprio: Add support for txtime-assist mode (diff) | |
| download | linux-dev-7ede7b03484bbb035aa5be98c45a40cfabdc0738.tar.xz linux-dev-7ede7b03484bbb035aa5be98c45a40cfabdc0738.zip | |
taprio: make clock reference conversions easier
Later in this series we will need to transform from
CLOCK_MONOTONIC (used in TCP) to the clock reference used in TAPRIO.
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Signed-off-by: Vedang Patel <vedang.patel@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched')
| -rw-r--r-- | net/sched/sch_taprio.c | 30 |
1 files changed, 22 insertions, 8 deletions
diff --git a/net/sched/sch_taprio.c b/net/sched/sch_taprio.c index 078230e44471..5c5e7db520dc 100644 --- a/net/sched/sch_taprio.c +++ b/net/sched/sch_taprio.c @@ -61,6 +61,7 @@ struct taprio_sched { struct Qdisc **qdiscs; struct Qdisc *root; u32 flags; + enum tk_offsets tk_offset; int clockid; atomic64_t picos_per_byte; /* Using picoseconds because for 10Gbps+ * speeds it's sub-nanoseconds per byte @@ -71,7 +72,6 @@ struct taprio_sched { struct sched_entry __rcu *current_entry; struct sched_gate_list __rcu *oper_sched; struct sched_gate_list __rcu *admin_sched; - ktime_t (*get_time)(void); struct hrtimer advance_timer; struct list_head taprio_list; int txtime_delay; @@ -85,6 +85,20 @@ static ktime_t sched_base_time(const struct sched_gate_list *sched) return ns_to_ktime(sched->base_time); } +static ktime_t taprio_get_time(struct taprio_sched *q) +{ + ktime_t mono = ktime_get(); + + switch (q->tk_offset) { + case TK_OFFS_MAX: + return mono; + default: + return ktime_mono_to_any(mono, q->tk_offset); + } + + return KTIME_MAX; +} + static void taprio_free_sched_cb(struct rcu_head *head) { struct sched_gate_list *sched = container_of(head, struct sched_gate_list, rcu); @@ -278,7 +292,7 @@ static long get_packet_txtime(struct sk_buff *skb, struct Qdisc *sch) struct sched_entry *entry; bool sched_changed; - now = q->get_time(); + now = taprio_get_time(q); minimum_time = ktime_add_ns(now, q->txtime_delay); rcu_read_lock(); @@ -469,7 +483,7 @@ static struct sk_buff *taprio_dequeue(struct Qdisc *sch) continue; len = qdisc_pkt_len(skb); - guard = ktime_add_ns(q->get_time(), + guard = ktime_add_ns(taprio_get_time(q), length_to_duration(q, len)); /* In the case that there's no gate entry, there's no @@ -838,7 +852,7 @@ static int taprio_get_start_time(struct Qdisc *sch, s64 n; base = sched_base_time(sched); - now = q->get_time(); + now = taprio_get_time(q); if (ktime_after(base, now)) { *start = base; @@ -1084,16 +1098,16 @@ static int taprio_change(struct Qdisc *sch, struct nlattr *opt, switch (q->clockid) { case CLOCK_REALTIME: - q->get_time = ktime_get_real; + q->tk_offset = TK_OFFS_REAL; break; case CLOCK_MONOTONIC: - q->get_time = ktime_get; + q->tk_offset = TK_OFFS_MAX; break; case CLOCK_BOOTTIME: - q->get_time = ktime_get_boottime; + q->tk_offset = TK_OFFS_BOOT; break; case CLOCK_TAI: - q->get_time = ktime_get_clocktai; + q->tk_offset = TK_OFFS_TAI; break; default: NL_SET_ERR_MSG(extack, "Invalid 'clockid'"); |