Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 154 insertions, 0 deletions

diff --git a/include/net/pkt_sched.h b/include/net/pkt_sched.h
new file mode 100644
index 000000000..1a6ac9242
--- /dev/null
+++ b/include/net/pkt_sched.h
@@ -0,0 +1,154 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __NET_PKT_SCHED_H
+#define __NET_PKT_SCHED_H
+
+#include <linux/jiffies.h>
+#include <linux/ktime.h>
+#include <linux/if_vlan.h>
+#include <linux/netdevice.h>
+#include <net/sch_generic.h>
+#include <net/net_namespace.h>
+#include <uapi/linux/pkt_sched.h>
+
+#define DEFAULT_TX_QUEUE_LEN	1000
+#define STAB_SIZE_LOG_MAX	30
+
+struct qdisc_walker {
+	int	stop;
+	int	skip;
+	int	count;
+	int	(*fn)(struct Qdisc *, unsigned long cl, struct qdisc_walker *);
+};
+
+#define QDISC_ALIGNTO		64
+#define QDISC_ALIGN(len)	(((len) + QDISC_ALIGNTO-1) & ~(QDISC_ALIGNTO-1))
+
+static inline void *qdisc_priv(struct Qdisc *q)
+{
+	return (char *) q + QDISC_ALIGN(sizeof(struct Qdisc));
+}
+
+/* 
+   Timer resolution MUST BE < 10% of min_schedulable_packet_size/bandwidth
+   
+   Normal IP packet size ~ 512byte, hence:
+
+   0.5Kbyte/1Mbyte/sec = 0.5msec, so that we need 50usec timer for
+   10Mbit ethernet.
+
+   10msec resolution -> <50Kbit/sec.
+   
+   The result: [34]86 is not good choice for QoS router :-(
+
+   The things are not so bad, because we may use artificial
+   clock evaluated by integration of network data flow
+   in the most critical places.
+ */
+
+typedef u64	psched_time_t;
+typedef long	psched_tdiff_t;
+
+/* Avoid doing 64 bit divide */
+#define PSCHED_SHIFT			6
+#define PSCHED_TICKS2NS(x)		((s64)(x) << PSCHED_SHIFT)
+#define PSCHED_NS2TICKS(x)		((x) >> PSCHED_SHIFT)
+
+#define PSCHED_TICKS_PER_SEC		PSCHED_NS2TICKS(NSEC_PER_SEC)
+#define PSCHED_PASTPERFECT		0
+
+static inline psched_time_t psched_get_time(void)
+{
+	return PSCHED_NS2TICKS(ktime_get_ns());
+}
+
+static inline psched_tdiff_t
+psched_tdiff_bounded(psched_time_t tv1, psched_time_t tv2, psched_time_t bound)
+{
+	return min(tv1 - tv2, bound);
+}
+
+struct qdisc_watchdog {
+	u64		last_expires;
+	struct hrtimer	timer;
+	struct Qdisc	*qdisc;
+};
+
+void qdisc_watchdog_init_clockid(struct qdisc_watchdog *wd, struct Qdisc *qdisc,
+				 clockid_t clockid);
+void qdisc_watchdog_init(struct qdisc_watchdog *wd, struct Qdisc *qdisc);
+void qdisc_watchdog_schedule_ns(struct qdisc_watchdog *wd, u64 expires);
+
+static inline void qdisc_watchdog_schedule(struct qdisc_watchdog *wd,
+					   psched_time_t expires)
+{
+	qdisc_watchdog_schedule_ns(wd, PSCHED_TICKS2NS(expires));
+}
+
+void qdisc_watchdog_cancel(struct qdisc_watchdog *wd);
+
+extern struct Qdisc_ops pfifo_qdisc_ops;
+extern struct Qdisc_ops bfifo_qdisc_ops;
+extern struct Qdisc_ops pfifo_head_drop_qdisc_ops;
+
+int fifo_set_limit(struct Qdisc *q, unsigned int limit);
+struct Qdisc *fifo_create_dflt(struct Qdisc *sch, struct Qdisc_ops *ops,
+			       unsigned int limit,
+			       struct netlink_ext_ack *extack);
+
+int register_qdisc(struct Qdisc_ops *qops);
+int unregister_qdisc(struct Qdisc_ops *qops);
+void qdisc_get_default(char *id, size_t len);
+int qdisc_set_default(const char *id);
+
+void qdisc_hash_add(struct Qdisc *q, bool invisible);
+void qdisc_hash_del(struct Qdisc *q);
+struct Qdisc *qdisc_lookup(struct net_device *dev, u32 handle);
+struct Qdisc *qdisc_lookup_rcu(struct net_device *dev, u32 handle);
+struct qdisc_rate_table *qdisc_get_rtab(struct tc_ratespec *r,
+					struct nlattr *tab,
+					struct netlink_ext_ack *extack);
+void qdisc_put_rtab(struct qdisc_rate_table *tab);
+void qdisc_put_stab(struct qdisc_size_table *tab);
+void qdisc_warn_nonwc(const char *txt, struct Qdisc *qdisc);
+bool sch_direct_xmit(struct sk_buff *skb, struct Qdisc *q,
+		     struct net_device *dev, struct netdev_queue *txq,
+		     spinlock_t *root_lock, bool validate);
+
+void __qdisc_run(struct Qdisc *q);
+
+static inline void qdisc_run(struct Qdisc *q)
+{
+	if (qdisc_run_begin(q)) {
+		__qdisc_run(q);
+		qdisc_run_end(q);
+	}
+}
+
+/* Calculate maximal size of packet seen by hard_start_xmit
+   routine of this device.
+ */
+static inline unsigned int psched_mtu(const struct net_device *dev)
+{
+	return dev->mtu + dev->hard_header_len;
+}
+
+static inline struct net *qdisc_net(struct Qdisc *q)
+{
+	return dev_net(q->dev_queue->dev);
+}
+
+struct tc_cbs_qopt_offload {
+	u8 enable;
+	s32 queue;
+	s32 hicredit;
+	s32 locredit;
+	s32 idleslope;
+	s32 sendslope;
+};
+
+struct tc_etf_qopt_offload {
+	u8 enable;
+	s32 queue;
+};
+
+#endif