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Diffstat (limited to 'net/sched/sch_red.c')
-rw-r--r--net/sched/sch_red.c93
1 files changed, 89 insertions, 4 deletions
diff --git a/net/sched/sch_red.c b/net/sched/sch_red.c
index 93b9d70a9b28..7f8ea9e297c3 100644
--- a/net/sched/sch_red.c
+++ b/net/sched/sch_red.c
@@ -19,6 +19,7 @@
#include <linux/kernel.h>
#include <linux/skbuff.h>
#include <net/pkt_sched.h>
+#include <net/pkt_cls.h>
#include <net/inet_ecn.h>
#include <net/red.h>
@@ -40,6 +41,7 @@ struct red_sched_data {
u32 limit; /* HARD maximal queue length */
unsigned char flags;
struct timer_list adapt_timer;
+ struct Qdisc *sch;
struct red_parms parms;
struct red_vars vars;
struct red_stats stats;
@@ -147,11 +149,37 @@ static void red_reset(struct Qdisc *sch)
red_restart(&q->vars);
}
+static int red_offload(struct Qdisc *sch, bool enable)
+{
+ struct red_sched_data *q = qdisc_priv(sch);
+ struct net_device *dev = qdisc_dev(sch);
+ struct tc_red_qopt_offload opt = {
+ .handle = sch->handle,
+ .parent = sch->parent,
+ };
+
+ if (!tc_can_offload(dev) || !dev->netdev_ops->ndo_setup_tc)
+ return -EOPNOTSUPP;
+
+ if (enable) {
+ opt.command = TC_RED_REPLACE;
+ opt.set.min = q->parms.qth_min >> q->parms.Wlog;
+ opt.set.max = q->parms.qth_max >> q->parms.Wlog;
+ opt.set.probability = q->parms.max_P;
+ opt.set.is_ecn = red_use_ecn(q);
+ } else {
+ opt.command = TC_RED_DESTROY;
+ }
+
+ return dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_QDISC_RED, &opt);
+}
+
static void red_destroy(struct Qdisc *sch)
{
struct red_sched_data *q = qdisc_priv(sch);
del_timer_sync(&q->adapt_timer);
+ red_offload(sch, false);
qdisc_destroy(q->qdisc);
}
@@ -218,13 +246,14 @@ static int red_change(struct Qdisc *sch, struct nlattr *opt)
red_start_of_idle_period(&q->vars);
sch_tree_unlock(sch);
+ red_offload(sch, true);
return 0;
}
-static inline void red_adaptative_timer(unsigned long arg)
+static inline void red_adaptative_timer(struct timer_list *t)
{
- struct Qdisc *sch = (struct Qdisc *)arg;
- struct red_sched_data *q = qdisc_priv(sch);
+ struct red_sched_data *q = from_timer(q, t, adapt_timer);
+ struct Qdisc *sch = q->sch;
spinlock_t *root_lock = qdisc_lock(qdisc_root_sleeping(sch));
spin_lock(root_lock);
@@ -238,10 +267,40 @@ static int red_init(struct Qdisc *sch, struct nlattr *opt)
struct red_sched_data *q = qdisc_priv(sch);
q->qdisc = &noop_qdisc;
- setup_timer(&q->adapt_timer, red_adaptative_timer, (unsigned long)sch);
+ q->sch = sch;
+ timer_setup(&q->adapt_timer, red_adaptative_timer, 0);
return red_change(sch, opt);
}
+static int red_dump_offload(struct Qdisc *sch, struct tc_red_qopt *opt)
+{
+ struct net_device *dev = qdisc_dev(sch);
+ struct tc_red_qopt_offload hw_stats = {
+ .command = TC_RED_STATS,
+ .handle = sch->handle,
+ .parent = sch->parent,
+ {
+ .stats.bstats = &sch->bstats,
+ .stats.qstats = &sch->qstats,
+ },
+ };
+ int err;
+
+ opt->flags &= ~TC_RED_OFFLOADED;
+ if (!tc_can_offload(dev) || !dev->netdev_ops->ndo_setup_tc)
+ return 0;
+
+ err = dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_QDISC_RED,
+ &hw_stats);
+ if (err == -EOPNOTSUPP)
+ return 0;
+
+ if (!err)
+ opt->flags |= TC_RED_OFFLOADED;
+
+ return err;
+}
+
static int red_dump(struct Qdisc *sch, struct sk_buff *skb)
{
struct red_sched_data *q = qdisc_priv(sch);
@@ -255,8 +314,13 @@ static int red_dump(struct Qdisc *sch, struct sk_buff *skb)
.Plog = q->parms.Plog,
.Scell_log = q->parms.Scell_log,
};
+ int err;
sch->qstats.backlog = q->qdisc->qstats.backlog;
+ err = red_dump_offload(sch, &opt);
+ if (err)
+ goto nla_put_failure;
+
opts = nla_nest_start(skb, TCA_OPTIONS);
if (opts == NULL)
goto nla_put_failure;
@@ -273,6 +337,7 @@ nla_put_failure:
static int red_dump_stats(struct Qdisc *sch, struct gnet_dump *d)
{
struct red_sched_data *q = qdisc_priv(sch);
+ struct net_device *dev = qdisc_dev(sch);
struct tc_red_xstats st = {
.early = q->stats.prob_drop + q->stats.forced_drop,
.pdrop = q->stats.pdrop,
@@ -280,6 +345,26 @@ static int red_dump_stats(struct Qdisc *sch, struct gnet_dump *d)
.marked = q->stats.prob_mark + q->stats.forced_mark,
};
+ if (tc_can_offload(dev) && dev->netdev_ops->ndo_setup_tc) {
+ struct red_stats hw_stats = {0};
+ struct tc_red_qopt_offload hw_stats_request = {
+ .command = TC_RED_XSTATS,
+ .handle = sch->handle,
+ .parent = sch->parent,
+ {
+ .xstats = &hw_stats,
+ },
+ };
+ if (!dev->netdev_ops->ndo_setup_tc(dev,
+ TC_SETUP_QDISC_RED,
+ &hw_stats_request)) {
+ st.early += hw_stats.prob_drop + hw_stats.forced_drop;
+ st.pdrop += hw_stats.pdrop;
+ st.other += hw_stats.other;
+ st.marked += hw_stats.prob_mark + hw_stats.forced_mark;
+ }
+ }
+
return gnet_stats_copy_app(d, &st, sizeof(st));
}