ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/net/sched/sch_mqprio.c b/marvell/linux/net/sched/sch_mqprio.c
new file mode 100644
index 0000000..56d3dc5
--- /dev/null
+++ b/marvell/linux/net/sched/sch_mqprio.c
@@ -0,0 +1,714 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * net/sched/sch_mqprio.c
+ *
+ * Copyright (c) 2010 John Fastabend <john.r.fastabend@intel.com>
+ */
+
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/skbuff.h>
+#include <linux/module.h>
+#include <net/netlink.h>
+#include <net/pkt_sched.h>
+#include <net/sch_generic.h>
+#include <net/pkt_cls.h>
+
+struct mqprio_sched {
+ struct Qdisc **qdiscs;
+ u16 mode;
+ u16 shaper;
+ int hw_offload;
+ u32 flags;
+ u64 min_rate[TC_QOPT_MAX_QUEUE];
+ u64 max_rate[TC_QOPT_MAX_QUEUE];
+};
+
+static void mqprio_destroy(struct Qdisc *sch)
+{
+ struct net_device *dev = qdisc_dev(sch);
+ struct mqprio_sched *priv = qdisc_priv(sch);
+ unsigned int ntx;
+
+ if (priv->qdiscs) {
+ for (ntx = 0;
+ ntx < dev->num_tx_queues && priv->qdiscs[ntx];
+ ntx++)
+ qdisc_put(priv->qdiscs[ntx]);
+ kfree(priv->qdiscs);
+ }
+
+ if (priv->hw_offload && dev->netdev_ops->ndo_setup_tc) {
+ struct tc_mqprio_qopt_offload mqprio = { { 0 } };
+
+ switch (priv->mode) {
+ case TC_MQPRIO_MODE_DCB:
+ case TC_MQPRIO_MODE_CHANNEL:
+ dev->netdev_ops->ndo_setup_tc(dev,
+ TC_SETUP_QDISC_MQPRIO,
+ &mqprio);
+ break;
+ default:
+ return;
+ }
+ } else {
+ netdev_set_num_tc(dev, 0);
+ }
+}
+
+static int mqprio_parse_opt(struct net_device *dev, struct tc_mqprio_qopt *qopt)
+{
+ int i, j;
+
+ /* Verify num_tc is not out of max range */
+ if (qopt->num_tc > TC_MAX_QUEUE)
+ return -EINVAL;
+
+ /* Verify priority mapping uses valid tcs */
+ for (i = 0; i < TC_BITMASK + 1; i++) {
+ if (qopt->prio_tc_map[i] >= qopt->num_tc)
+ return -EINVAL;
+ }
+
+ /* Limit qopt->hw to maximum supported offload value. Drivers have
+ * the option of overriding this later if they don't support the a
+ * given offload type.
+ */
+ if (qopt->hw > TC_MQPRIO_HW_OFFLOAD_MAX)
+ qopt->hw = TC_MQPRIO_HW_OFFLOAD_MAX;
+
+ /* If hardware offload is requested we will leave it to the device
+ * to either populate the queue counts itself or to validate the
+ * provided queue counts. If ndo_setup_tc is not present then
+ * hardware doesn't support offload and we should return an error.
+ */
+ if (qopt->hw)
+ return dev->netdev_ops->ndo_setup_tc ? 0 : -EINVAL;
+
+ for (i = 0; i < qopt->num_tc; i++) {
+ unsigned int last = qopt->offset[i] + qopt->count[i];
+
+ /* Verify the queue count is in tx range being equal to the
+ * real_num_tx_queues indicates the last queue is in use.
+ */
+ if (qopt->offset[i] >= dev->real_num_tx_queues ||
+ !qopt->count[i] ||
+ last > dev->real_num_tx_queues)
+ return -EINVAL;
+
+ /* Verify that the offset and counts do not overlap */
+ for (j = i + 1; j < qopt->num_tc; j++) {
+ if (last > qopt->offset[j])
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+static const struct nla_policy mqprio_policy[TCA_MQPRIO_MAX + 1] = {
+ [TCA_MQPRIO_MODE] = { .len = sizeof(u16) },
+ [TCA_MQPRIO_SHAPER] = { .len = sizeof(u16) },
+ [TCA_MQPRIO_MIN_RATE64] = { .type = NLA_NESTED },
+ [TCA_MQPRIO_MAX_RATE64] = { .type = NLA_NESTED },
+};
+
+static int parse_attr(struct nlattr *tb[], int maxtype, struct nlattr *nla,
+ const struct nla_policy *policy, int len)
+{
+ int nested_len = nla_len(nla) - NLA_ALIGN(len);
+
+ if (nested_len >= nla_attr_size(0))
+ return nla_parse_deprecated(tb, maxtype,
+ nla_data(nla) + NLA_ALIGN(len),
+ nested_len, policy, NULL);
+
+ memset(tb, 0, sizeof(struct nlattr *) * (maxtype + 1));
+ return 0;
+}
+
+static int mqprio_parse_nlattr(struct Qdisc *sch, struct tc_mqprio_qopt *qopt,
+ struct nlattr *opt,
+ struct netlink_ext_ack *extack)
+{
+ struct mqprio_sched *priv = qdisc_priv(sch);
+ struct nlattr *tb[TCA_MQPRIO_MAX + 1];
+ struct nlattr *attr;
+ int i, rem, err;
+
+ err = parse_attr(tb, TCA_MQPRIO_MAX, opt, mqprio_policy,
+ sizeof(*qopt));
+ if (err < 0)
+ return err;
+
+ if (!qopt->hw) {
+ NL_SET_ERR_MSG(extack,
+ "mqprio TCA_OPTIONS can only contain netlink attributes in hardware mode");
+ return -EINVAL;
+ }
+
+ if (tb[TCA_MQPRIO_MODE]) {
+ priv->flags |= TC_MQPRIO_F_MODE;
+ priv->mode = *(u16 *)nla_data(tb[TCA_MQPRIO_MODE]);
+ }
+
+ if (tb[TCA_MQPRIO_SHAPER]) {
+ priv->flags |= TC_MQPRIO_F_SHAPER;
+ priv->shaper = *(u16 *)nla_data(tb[TCA_MQPRIO_SHAPER]);
+ }
+
+ if (tb[TCA_MQPRIO_MIN_RATE64]) {
+ if (priv->shaper != TC_MQPRIO_SHAPER_BW_RATE) {
+ NL_SET_ERR_MSG_ATTR(extack, tb[TCA_MQPRIO_MIN_RATE64],
+ "min_rate accepted only when shaper is in bw_rlimit mode");
+ return -EINVAL;
+ }
+ i = 0;
+ nla_for_each_nested(attr, tb[TCA_MQPRIO_MIN_RATE64],
+ rem) {
+ if (nla_type(attr) != TCA_MQPRIO_MIN_RATE64) {
+ NL_SET_ERR_MSG_ATTR(extack, attr,
+ "Attribute type expected to be TCA_MQPRIO_MIN_RATE64");
+ return -EINVAL;
+ }
+
+ if (nla_len(attr) != sizeof(u64)) {
+ NL_SET_ERR_MSG_ATTR(extack, attr,
+ "Attribute TCA_MQPRIO_MIN_RATE64 expected to have 8 bytes length");
+ return -EINVAL;
+ }
+
+ if (i >= qopt->num_tc)
+ break;
+ priv->min_rate[i] = *(u64 *)nla_data(attr);
+ i++;
+ }
+ priv->flags |= TC_MQPRIO_F_MIN_RATE;
+ }
+
+ if (tb[TCA_MQPRIO_MAX_RATE64]) {
+ if (priv->shaper != TC_MQPRIO_SHAPER_BW_RATE) {
+ NL_SET_ERR_MSG_ATTR(extack, tb[TCA_MQPRIO_MAX_RATE64],
+ "max_rate accepted only when shaper is in bw_rlimit mode");
+ return -EINVAL;
+ }
+ i = 0;
+ nla_for_each_nested(attr, tb[TCA_MQPRIO_MAX_RATE64],
+ rem) {
+ if (nla_type(attr) != TCA_MQPRIO_MAX_RATE64) {
+ NL_SET_ERR_MSG_ATTR(extack, attr,
+ "Attribute type expected to be TCA_MQPRIO_MAX_RATE64");
+ return -EINVAL;
+ }
+
+ if (nla_len(attr) != sizeof(u64)) {
+ NL_SET_ERR_MSG_ATTR(extack, attr,
+ "Attribute TCA_MQPRIO_MAX_RATE64 expected to have 8 bytes length");
+ return -EINVAL;
+ }
+
+ if (i >= qopt->num_tc)
+ break;
+ priv->max_rate[i] = *(u64 *)nla_data(attr);
+ i++;
+ }
+ priv->flags |= TC_MQPRIO_F_MAX_RATE;
+ }
+
+ return 0;
+}
+
+static int mqprio_init(struct Qdisc *sch, struct nlattr *opt,
+ struct netlink_ext_ack *extack)
+{
+ struct net_device *dev = qdisc_dev(sch);
+ struct mqprio_sched *priv = qdisc_priv(sch);
+ struct netdev_queue *dev_queue;
+ struct Qdisc *qdisc;
+ int i, err = -EOPNOTSUPP;
+ struct tc_mqprio_qopt *qopt = NULL;
+ int len;
+
+ BUILD_BUG_ON(TC_MAX_QUEUE != TC_QOPT_MAX_QUEUE);
+ BUILD_BUG_ON(TC_BITMASK != TC_QOPT_BITMASK);
+
+ if (sch->parent != TC_H_ROOT)
+ return -EOPNOTSUPP;
+
+ if (!netif_is_multiqueue(dev))
+ return -EOPNOTSUPP;
+
+ /* make certain can allocate enough classids to handle queues */
+ if (dev->num_tx_queues >= TC_H_MIN_PRIORITY)
+ return -ENOMEM;
+
+ if (!opt || nla_len(opt) < sizeof(*qopt))
+ return -EINVAL;
+
+ qopt = nla_data(opt);
+ if (mqprio_parse_opt(dev, qopt))
+ return -EINVAL;
+
+ len = nla_len(opt) - NLA_ALIGN(sizeof(*qopt));
+ if (len > 0) {
+ err = mqprio_parse_nlattr(sch, qopt, opt, extack);
+ if (err)
+ return err;
+ }
+
+ /* pre-allocate qdisc, attachment can't fail */
+ priv->qdiscs = kcalloc(dev->num_tx_queues, sizeof(priv->qdiscs[0]),
+ GFP_KERNEL);
+ if (!priv->qdiscs)
+ return -ENOMEM;
+
+ for (i = 0; i < dev->num_tx_queues; i++) {
+ dev_queue = netdev_get_tx_queue(dev, i);
+ qdisc = qdisc_create_dflt(dev_queue,
+ get_default_qdisc_ops(dev, i),
+ TC_H_MAKE(TC_H_MAJ(sch->handle),
+ TC_H_MIN(i + 1)), extack);
+ if (!qdisc)
+ return -ENOMEM;
+
+ priv->qdiscs[i] = qdisc;
+ qdisc->flags |= TCQ_F_ONETXQUEUE | TCQ_F_NOPARENT;
+ }
+
+ /* If the mqprio options indicate that hardware should own
+ * the queue mapping then run ndo_setup_tc otherwise use the
+ * supplied and verified mapping
+ */
+ if (qopt->hw) {
+ struct tc_mqprio_qopt_offload mqprio = {.qopt = *qopt};
+
+ switch (priv->mode) {
+ case TC_MQPRIO_MODE_DCB:
+ if (priv->shaper != TC_MQPRIO_SHAPER_DCB)
+ return -EINVAL;
+ break;
+ case TC_MQPRIO_MODE_CHANNEL:
+ mqprio.flags = priv->flags;
+ if (priv->flags & TC_MQPRIO_F_MODE)
+ mqprio.mode = priv->mode;
+ if (priv->flags & TC_MQPRIO_F_SHAPER)
+ mqprio.shaper = priv->shaper;
+ if (priv->flags & TC_MQPRIO_F_MIN_RATE)
+ for (i = 0; i < mqprio.qopt.num_tc; i++)
+ mqprio.min_rate[i] = priv->min_rate[i];
+ if (priv->flags & TC_MQPRIO_F_MAX_RATE)
+ for (i = 0; i < mqprio.qopt.num_tc; i++)
+ mqprio.max_rate[i] = priv->max_rate[i];
+ break;
+ default:
+ return -EINVAL;
+ }
+ err = dev->netdev_ops->ndo_setup_tc(dev,
+ TC_SETUP_QDISC_MQPRIO,
+ &mqprio);
+ if (err)
+ return err;
+
+ priv->hw_offload = mqprio.qopt.hw;
+ } else {
+ netdev_set_num_tc(dev, qopt->num_tc);
+ for (i = 0; i < qopt->num_tc; i++)
+ netdev_set_tc_queue(dev, i,
+ qopt->count[i], qopt->offset[i]);
+ }
+
+ /* Always use supplied priority mappings */
+ for (i = 0; i < TC_BITMASK + 1; i++)
+ netdev_set_prio_tc_map(dev, i, qopt->prio_tc_map[i]);
+
+ sch->flags |= TCQ_F_MQROOT;
+ return 0;
+}
+
+static void mqprio_attach(struct Qdisc *sch)
+{
+ struct net_device *dev = qdisc_dev(sch);
+ struct mqprio_sched *priv = qdisc_priv(sch);
+ struct Qdisc *qdisc, *old;
+ unsigned int ntx;
+
+ /* Attach underlying qdisc */
+ for (ntx = 0; ntx < dev->num_tx_queues; ntx++) {
+ qdisc = priv->qdiscs[ntx];
+ old = dev_graft_qdisc(qdisc->dev_queue, qdisc);
+ if (old)
+ qdisc_put(old);
+ if (ntx < dev->real_num_tx_queues)
+ qdisc_hash_add(qdisc, false);
+ }
+ kfree(priv->qdiscs);
+ priv->qdiscs = NULL;
+}
+
+static void mqprio_change_real_num_tx(struct Qdisc *sch,
+ unsigned int new_real_tx)
+{
+ struct net_device *dev = qdisc_dev(sch);
+ struct Qdisc *qdisc;
+ unsigned int i;
+
+ for (i = new_real_tx; i < dev->real_num_tx_queues; i++) {
+ qdisc = netdev_get_tx_queue(dev, i)->qdisc_sleeping;
+ /* Only update the default qdiscs we created,
+ * qdiscs with handles are always hashed.
+ */
+ if (qdisc != &noop_qdisc && !qdisc->handle)
+ qdisc_hash_del(qdisc);
+ }
+ for (i = dev->real_num_tx_queues; i < new_real_tx; i++) {
+ qdisc = netdev_get_tx_queue(dev, i)->qdisc_sleeping;
+ if (qdisc != &noop_qdisc && !qdisc->handle)
+ qdisc_hash_add(qdisc, false);
+ }
+}
+
+static struct netdev_queue *mqprio_queue_get(struct Qdisc *sch,
+ unsigned long cl)
+{
+ struct net_device *dev = qdisc_dev(sch);
+ unsigned long ntx = cl - 1;
+
+ if (ntx >= dev->num_tx_queues)
+ return NULL;
+ return netdev_get_tx_queue(dev, ntx);
+}
+
+static int mqprio_graft(struct Qdisc *sch, unsigned long cl, struct Qdisc *new,
+ struct Qdisc **old, struct netlink_ext_ack *extack)
+{
+ struct net_device *dev = qdisc_dev(sch);
+ struct netdev_queue *dev_queue = mqprio_queue_get(sch, cl);
+
+ if (!dev_queue)
+ return -EINVAL;
+
+ if (dev->flags & IFF_UP)
+ dev_deactivate(dev);
+
+ *old = dev_graft_qdisc(dev_queue, new);
+
+ if (new)
+ new->flags |= TCQ_F_ONETXQUEUE | TCQ_F_NOPARENT;
+
+ if (dev->flags & IFF_UP)
+ dev_activate(dev);
+
+ return 0;
+}
+
+static int dump_rates(struct mqprio_sched *priv,
+ struct tc_mqprio_qopt *opt, struct sk_buff *skb)
+{
+ struct nlattr *nest;
+ int i;
+
+ if (priv->flags & TC_MQPRIO_F_MIN_RATE) {
+ nest = nla_nest_start_noflag(skb, TCA_MQPRIO_MIN_RATE64);
+ if (!nest)
+ goto nla_put_failure;
+
+ for (i = 0; i < opt->num_tc; i++) {
+ if (nla_put(skb, TCA_MQPRIO_MIN_RATE64,
+ sizeof(priv->min_rate[i]),
+ &priv->min_rate[i]))
+ goto nla_put_failure;
+ }
+ nla_nest_end(skb, nest);
+ }
+
+ if (priv->flags & TC_MQPRIO_F_MAX_RATE) {
+ nest = nla_nest_start_noflag(skb, TCA_MQPRIO_MAX_RATE64);
+ if (!nest)
+ goto nla_put_failure;
+
+ for (i = 0; i < opt->num_tc; i++) {
+ if (nla_put(skb, TCA_MQPRIO_MAX_RATE64,
+ sizeof(priv->max_rate[i]),
+ &priv->max_rate[i]))
+ goto nla_put_failure;
+ }
+ nla_nest_end(skb, nest);
+ }
+ return 0;
+
+nla_put_failure:
+ nla_nest_cancel(skb, nest);
+ return -1;
+}
+
+static int mqprio_dump(struct Qdisc *sch, struct sk_buff *skb)
+{
+ struct net_device *dev = qdisc_dev(sch);
+ struct mqprio_sched *priv = qdisc_priv(sch);
+ struct nlattr *nla = (struct nlattr *)skb_tail_pointer(skb);
+ struct tc_mqprio_qopt opt = { 0 };
+ struct Qdisc *qdisc;
+ unsigned int ntx, tc;
+
+ sch->q.qlen = 0;
+ memset(&sch->bstats, 0, sizeof(sch->bstats));
+ memset(&sch->qstats, 0, sizeof(sch->qstats));
+
+ /* MQ supports lockless qdiscs. However, statistics accounting needs
+ * to account for all, none, or a mix of locked and unlocked child
+ * qdiscs. Percpu stats are added to counters in-band and locking
+ * qdisc totals are added at end.
+ */
+ for (ntx = 0; ntx < dev->num_tx_queues; ntx++) {
+ qdisc = netdev_get_tx_queue(dev, ntx)->qdisc_sleeping;
+ spin_lock_bh(qdisc_lock(qdisc));
+
+ if (qdisc_is_percpu_stats(qdisc)) {
+ __u32 qlen = qdisc_qlen_sum(qdisc);
+
+ __gnet_stats_copy_basic(NULL, &sch->bstats,
+ qdisc->cpu_bstats,
+ &qdisc->bstats);
+ __gnet_stats_copy_queue(&sch->qstats,
+ qdisc->cpu_qstats,
+ &qdisc->qstats, qlen);
+ sch->q.qlen += qlen;
+ } else {
+ sch->q.qlen += qdisc->q.qlen;
+ sch->bstats.bytes += qdisc->bstats.bytes;
+ sch->bstats.packets += qdisc->bstats.packets;
+ sch->qstats.backlog += qdisc->qstats.backlog;
+ sch->qstats.drops += qdisc->qstats.drops;
+ sch->qstats.requeues += qdisc->qstats.requeues;
+ sch->qstats.overlimits += qdisc->qstats.overlimits;
+ }
+
+ spin_unlock_bh(qdisc_lock(qdisc));
+ }
+
+ opt.num_tc = netdev_get_num_tc(dev);
+ memcpy(opt.prio_tc_map, dev->prio_tc_map, sizeof(opt.prio_tc_map));
+ opt.hw = priv->hw_offload;
+
+ for (tc = 0; tc < netdev_get_num_tc(dev); tc++) {
+ opt.count[tc] = dev->tc_to_txq[tc].count;
+ opt.offset[tc] = dev->tc_to_txq[tc].offset;
+ }
+
+ if (nla_put(skb, TCA_OPTIONS, sizeof(opt), &opt))
+ goto nla_put_failure;
+
+ if ((priv->flags & TC_MQPRIO_F_MODE) &&
+ nla_put_u16(skb, TCA_MQPRIO_MODE, priv->mode))
+ goto nla_put_failure;
+
+ if ((priv->flags & TC_MQPRIO_F_SHAPER) &&
+ nla_put_u16(skb, TCA_MQPRIO_SHAPER, priv->shaper))
+ goto nla_put_failure;
+
+ if ((priv->flags & TC_MQPRIO_F_MIN_RATE ||
+ priv->flags & TC_MQPRIO_F_MAX_RATE) &&
+ (dump_rates(priv, &opt, skb) != 0))
+ goto nla_put_failure;
+
+ return nla_nest_end(skb, nla);
+nla_put_failure:
+ nlmsg_trim(skb, nla);
+ return -1;
+}
+
+static struct Qdisc *mqprio_leaf(struct Qdisc *sch, unsigned long cl)
+{
+ struct netdev_queue *dev_queue = mqprio_queue_get(sch, cl);
+
+ if (!dev_queue)
+ return NULL;
+
+ return dev_queue->qdisc_sleeping;
+}
+
+static unsigned long mqprio_find(struct Qdisc *sch, u32 classid)
+{
+ struct net_device *dev = qdisc_dev(sch);
+ unsigned int ntx = TC_H_MIN(classid);
+
+ /* There are essentially two regions here that have valid classid
+ * values. The first region will have a classid value of 1 through
+ * num_tx_queues. All of these are backed by actual Qdiscs.
+ */
+ if (ntx < TC_H_MIN_PRIORITY)
+ return (ntx <= dev->num_tx_queues) ? ntx : 0;
+
+ /* The second region represents the hardware traffic classes. These
+ * are represented by classid values of TC_H_MIN_PRIORITY through
+ * TC_H_MIN_PRIORITY + netdev_get_num_tc - 1
+ */
+ return ((ntx - TC_H_MIN_PRIORITY) < netdev_get_num_tc(dev)) ? ntx : 0;
+}
+
+static int mqprio_dump_class(struct Qdisc *sch, unsigned long cl,
+ struct sk_buff *skb, struct tcmsg *tcm)
+{
+ if (cl < TC_H_MIN_PRIORITY) {
+ struct netdev_queue *dev_queue = mqprio_queue_get(sch, cl);
+ struct net_device *dev = qdisc_dev(sch);
+ int tc = netdev_txq_to_tc(dev, cl - 1);
+
+ tcm->tcm_parent = (tc < 0) ? 0 :
+ TC_H_MAKE(TC_H_MAJ(sch->handle),
+ TC_H_MIN(tc + TC_H_MIN_PRIORITY));
+ tcm->tcm_info = dev_queue->qdisc_sleeping->handle;
+ } else {
+ tcm->tcm_parent = TC_H_ROOT;
+ tcm->tcm_info = 0;
+ }
+ tcm->tcm_handle |= TC_H_MIN(cl);
+ return 0;
+}
+
+static int mqprio_dump_class_stats(struct Qdisc *sch, unsigned long cl,
+ struct gnet_dump *d)
+ __releases(d->lock)
+ __acquires(d->lock)
+{
+ if (cl >= TC_H_MIN_PRIORITY) {
+ int i;
+ __u32 qlen = 0;
+ struct gnet_stats_queue qstats = {0};
+ struct gnet_stats_basic_packed bstats = {0};
+ struct net_device *dev = qdisc_dev(sch);
+ struct netdev_tc_txq tc = dev->tc_to_txq[cl & TC_BITMASK];
+
+ /* Drop lock here it will be reclaimed before touching
+ * statistics this is required because the d->lock we
+ * hold here is the look on dev_queue->qdisc_sleeping
+ * also acquired below.
+ */
+ if (d->lock)
+ spin_unlock_bh(d->lock);
+
+ for (i = tc.offset; i < tc.offset + tc.count; i++) {
+ struct netdev_queue *q = netdev_get_tx_queue(dev, i);
+ struct Qdisc *qdisc = rtnl_dereference(q->qdisc);
+
+ spin_lock_bh(qdisc_lock(qdisc));
+
+ if (qdisc_is_percpu_stats(qdisc)) {
+ qlen = qdisc_qlen_sum(qdisc);
+
+ __gnet_stats_copy_basic(NULL, &bstats,
+ qdisc->cpu_bstats,
+ &qdisc->bstats);
+ __gnet_stats_copy_queue(&qstats,
+ qdisc->cpu_qstats,
+ &qdisc->qstats,
+ qlen);
+ } else {
+ qlen += qdisc->q.qlen;
+ bstats.bytes += qdisc->bstats.bytes;
+ bstats.packets += qdisc->bstats.packets;
+ qstats.backlog += qdisc->qstats.backlog;
+ qstats.drops += qdisc->qstats.drops;
+ qstats.requeues += qdisc->qstats.requeues;
+ qstats.overlimits += qdisc->qstats.overlimits;
+ }
+ spin_unlock_bh(qdisc_lock(qdisc));
+ }
+
+ /* Reclaim root sleeping lock before completing stats */
+ if (d->lock)
+ spin_lock_bh(d->lock);
+ if (gnet_stats_copy_basic(NULL, d, NULL, &bstats) < 0 ||
+ gnet_stats_copy_queue(d, NULL, &qstats, qlen) < 0)
+ return -1;
+ } else {
+ struct netdev_queue *dev_queue = mqprio_queue_get(sch, cl);
+
+ sch = dev_queue->qdisc_sleeping;
+ if (gnet_stats_copy_basic(qdisc_root_sleeping_running(sch), d,
+ sch->cpu_bstats, &sch->bstats) < 0 ||
+ qdisc_qstats_copy(d, sch) < 0)
+ return -1;
+ }
+ return 0;
+}
+
+static void mqprio_walk(struct Qdisc *sch, struct qdisc_walker *arg)
+{
+ struct net_device *dev = qdisc_dev(sch);
+ unsigned long ntx;
+
+ if (arg->stop)
+ return;
+
+ /* Walk hierarchy with a virtual class per tc */
+ arg->count = arg->skip;
+ for (ntx = arg->skip; ntx < netdev_get_num_tc(dev); ntx++) {
+ if (arg->fn(sch, ntx + TC_H_MIN_PRIORITY, arg) < 0) {
+ arg->stop = 1;
+ return;
+ }
+ arg->count++;
+ }
+
+ /* Pad the values and skip over unused traffic classes */
+ if (ntx < TC_MAX_QUEUE) {
+ arg->count = TC_MAX_QUEUE;
+ ntx = TC_MAX_QUEUE;
+ }
+
+ /* Reset offset, sort out remaining per-queue qdiscs */
+ for (ntx -= TC_MAX_QUEUE; ntx < dev->num_tx_queues; ntx++) {
+ if (arg->fn(sch, ntx + 1, arg) < 0) {
+ arg->stop = 1;
+ return;
+ }
+ arg->count++;
+ }
+}
+
+static struct netdev_queue *mqprio_select_queue(struct Qdisc *sch,
+ struct tcmsg *tcm)
+{
+ return mqprio_queue_get(sch, TC_H_MIN(tcm->tcm_parent));
+}
+
+static const struct Qdisc_class_ops mqprio_class_ops = {
+ .graft = mqprio_graft,
+ .leaf = mqprio_leaf,
+ .find = mqprio_find,
+ .walk = mqprio_walk,
+ .dump = mqprio_dump_class,
+ .dump_stats = mqprio_dump_class_stats,
+ .select_queue = mqprio_select_queue,
+};
+
+static struct Qdisc_ops mqprio_qdisc_ops __read_mostly = {
+ .cl_ops = &mqprio_class_ops,
+ .id = "mqprio",
+ .priv_size = sizeof(struct mqprio_sched),
+ .init = mqprio_init,
+ .destroy = mqprio_destroy,
+ .attach = mqprio_attach,
+ .change_real_num_tx = mqprio_change_real_num_tx,
+ .dump = mqprio_dump,
+ .owner = THIS_MODULE,
+};
+
+static int __init mqprio_module_init(void)
+{
+ return register_qdisc(&mqprio_qdisc_ops);
+}
+
+static void __exit mqprio_module_exit(void)
+{
+ unregister_qdisc(&mqprio_qdisc_ops);
+}
+
+module_init(mqprio_module_init);
+module_exit(mqprio_module_exit);
+
+MODULE_LICENSE("GPL");