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authorJakub Kicinski <jakub.kicinski@netronome.com>2018-11-19 15:21:42 -0800
committerDavid S. Miller <davem@davemloft.net>2018-11-19 18:53:45 -0800
commit890d8d23ec3c9eca847be0593c0cf5f650b97271 (patch)
tree725e5fc572a368df1337b25042453887b7a4121a /net
parent184ec856cad966688e98072a1a7edae6af5d23f3 (diff)
net: sched: gred: add basic Qdisc offload
Add basic offload for the GRED Qdisc. Inform the drivers any time Qdisc or virtual queue configuration changes. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: John Hurley <john.hurley@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/sched/sch_gred.c47
1 files changed, 47 insertions, 0 deletions
diff --git a/net/sched/sch_gred.c b/net/sched/sch_gred.c
index 8b8c325f48bc..908c9d1dfdf8 100644
--- a/net/sched/sch_gred.c
+++ b/net/sched/sch_gred.c
@@ -23,6 +23,7 @@
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/skbuff.h>
+#include <net/pkt_cls.h>
#include <net/pkt_sched.h>
#include <net/red.h>
@@ -311,6 +312,48 @@ static void gred_reset(struct Qdisc *sch)
}
}
+static void gred_offload(struct Qdisc *sch, enum tc_gred_command command)
+{
+ struct gred_sched *table = qdisc_priv(sch);
+ struct net_device *dev = qdisc_dev(sch);
+ struct tc_gred_qopt_offload opt = {
+ .command = command,
+ .handle = sch->handle,
+ .parent = sch->parent,
+ };
+
+ if (!tc_can_offload(dev) || !dev->netdev_ops->ndo_setup_tc)
+ return;
+
+ if (command == TC_GRED_REPLACE) {
+ unsigned int i;
+
+ opt.set.grio_on = gred_rio_mode(table);
+ opt.set.wred_on = gred_wred_mode(table);
+ opt.set.dp_cnt = table->DPs;
+ opt.set.dp_def = table->def;
+
+ for (i = 0; i < table->DPs; i++) {
+ struct gred_sched_data *q = table->tab[i];
+
+ if (!q)
+ continue;
+ opt.set.tab[i].present = true;
+ opt.set.tab[i].limit = q->limit;
+ opt.set.tab[i].prio = q->prio;
+ opt.set.tab[i].min = q->parms.qth_min >> q->parms.Wlog;
+ opt.set.tab[i].max = q->parms.qth_max >> q->parms.Wlog;
+ opt.set.tab[i].is_ecn = gred_use_ecn(q);
+ opt.set.tab[i].is_harddrop = gred_use_harddrop(q);
+ opt.set.tab[i].probability = q->parms.max_P;
+ opt.set.tab[i].backlog = &q->backlog;
+ }
+ opt.set.qstats = &sch->qstats;
+ }
+
+ dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_QDISC_GRED, &opt);
+}
+
static inline void gred_destroy_vq(struct gred_sched_data *q)
{
kfree(q);
@@ -385,6 +428,7 @@ static int gred_change_table_def(struct Qdisc *sch, struct nlattr *dps,
}
}
+ gred_offload(sch, TC_GRED_REPLACE);
return 0;
}
@@ -630,6 +674,8 @@ static int gred_change(struct Qdisc *sch, struct nlattr *opt,
sch_tree_unlock(sch);
kfree(prealloc);
+
+ gred_offload(sch, TC_GRED_REPLACE);
return 0;
err_unlock_free:
@@ -815,6 +861,7 @@ static void gred_destroy(struct Qdisc *sch)
if (table->tab[i])
gred_destroy_vq(table->tab[i]);
}
+ gred_offload(sch, TC_GRED_DESTROY);
}
static struct Qdisc_ops gred_qdisc_ops __read_mostly = {