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196 lines
5.0 KiB
196 lines
5.0 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef __NET_PKT_SCHED_H |
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#define __NET_PKT_SCHED_H |
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#include <linux/jiffies.h> |
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#include <linux/ktime.h> |
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#include <linux/if_vlan.h> |
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#include <linux/netdevice.h> |
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#include <net/sch_generic.h> |
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#include <net/net_namespace.h> |
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#include <uapi/linux/pkt_sched.h> |
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#define DEFAULT_TX_QUEUE_LEN 1000 |
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#define STAB_SIZE_LOG_MAX 30 |
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struct qdisc_walker { |
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int stop; |
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int skip; |
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int count; |
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int (*fn)(struct Qdisc *, unsigned long cl, struct qdisc_walker *); |
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}; |
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static inline void *qdisc_priv(struct Qdisc *q) |
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{ |
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return &q->privdata; |
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} |
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static inline struct Qdisc *qdisc_from_priv(void *priv) |
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{ |
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return container_of(priv, struct Qdisc, privdata); |
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} |
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/* |
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Timer resolution MUST BE < 10% of min_schedulable_packet_size/bandwidth |
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Normal IP packet size ~ 512byte, hence: |
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0.5Kbyte/1Mbyte/sec = 0.5msec, so that we need 50usec timer for |
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10Mbit ethernet. |
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10msec resolution -> <50Kbit/sec. |
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The result: [34]86 is not good choice for QoS router :-( |
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The things are not so bad, because we may use artificial |
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clock evaluated by integration of network data flow |
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in the most critical places. |
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*/ |
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typedef u64 psched_time_t; |
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typedef long psched_tdiff_t; |
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/* Avoid doing 64 bit divide */ |
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#define PSCHED_SHIFT 6 |
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#define PSCHED_TICKS2NS(x) ((s64)(x) << PSCHED_SHIFT) |
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#define PSCHED_NS2TICKS(x) ((x) >> PSCHED_SHIFT) |
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#define PSCHED_TICKS_PER_SEC PSCHED_NS2TICKS(NSEC_PER_SEC) |
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#define PSCHED_PASTPERFECT 0 |
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static inline psched_time_t psched_get_time(void) |
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{ |
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return PSCHED_NS2TICKS(ktime_get_ns()); |
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} |
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static inline psched_tdiff_t |
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psched_tdiff_bounded(psched_time_t tv1, psched_time_t tv2, psched_time_t bound) |
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{ |
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return min(tv1 - tv2, bound); |
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} |
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struct qdisc_watchdog { |
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u64 last_expires; |
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struct hrtimer timer; |
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struct Qdisc *qdisc; |
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}; |
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void qdisc_watchdog_init_clockid(struct qdisc_watchdog *wd, struct Qdisc *qdisc, |
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clockid_t clockid); |
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void qdisc_watchdog_init(struct qdisc_watchdog *wd, struct Qdisc *qdisc); |
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void qdisc_watchdog_schedule_range_ns(struct qdisc_watchdog *wd, u64 expires, |
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u64 delta_ns); |
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static inline void qdisc_watchdog_schedule_ns(struct qdisc_watchdog *wd, |
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u64 expires) |
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{ |
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return qdisc_watchdog_schedule_range_ns(wd, expires, 0ULL); |
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} |
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static inline void qdisc_watchdog_schedule(struct qdisc_watchdog *wd, |
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psched_time_t expires) |
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{ |
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qdisc_watchdog_schedule_ns(wd, PSCHED_TICKS2NS(expires)); |
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} |
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void qdisc_watchdog_cancel(struct qdisc_watchdog *wd); |
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extern struct Qdisc_ops pfifo_qdisc_ops; |
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extern struct Qdisc_ops bfifo_qdisc_ops; |
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extern struct Qdisc_ops pfifo_head_drop_qdisc_ops; |
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int fifo_set_limit(struct Qdisc *q, unsigned int limit); |
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struct Qdisc *fifo_create_dflt(struct Qdisc *sch, struct Qdisc_ops *ops, |
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unsigned int limit, |
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struct netlink_ext_ack *extack); |
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int register_qdisc(struct Qdisc_ops *qops); |
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int unregister_qdisc(struct Qdisc_ops *qops); |
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void qdisc_get_default(char *id, size_t len); |
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int qdisc_set_default(const char *id); |
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void qdisc_hash_add(struct Qdisc *q, bool invisible); |
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void qdisc_hash_del(struct Qdisc *q); |
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struct Qdisc *qdisc_lookup(struct net_device *dev, u32 handle); |
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struct Qdisc *qdisc_lookup_rcu(struct net_device *dev, u32 handle); |
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struct qdisc_rate_table *qdisc_get_rtab(struct tc_ratespec *r, |
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struct nlattr *tab, |
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struct netlink_ext_ack *extack); |
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void qdisc_put_rtab(struct qdisc_rate_table *tab); |
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void qdisc_put_stab(struct qdisc_size_table *tab); |
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void qdisc_warn_nonwc(const char *txt, struct Qdisc *qdisc); |
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bool sch_direct_xmit(struct sk_buff *skb, struct Qdisc *q, |
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struct net_device *dev, struct netdev_queue *txq, |
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spinlock_t *root_lock, bool validate); |
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void __qdisc_run(struct Qdisc *q); |
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static inline void qdisc_run(struct Qdisc *q) |
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{ |
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if (qdisc_run_begin(q)) { |
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__qdisc_run(q); |
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qdisc_run_end(q); |
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} |
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} |
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/* Calculate maximal size of packet seen by hard_start_xmit |
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routine of this device. |
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*/ |
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static inline unsigned int psched_mtu(const struct net_device *dev) |
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{ |
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return dev->mtu + dev->hard_header_len; |
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} |
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static inline struct net *qdisc_net(struct Qdisc *q) |
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{ |
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return dev_net(q->dev_queue->dev); |
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} |
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struct tc_cbs_qopt_offload { |
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u8 enable; |
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s32 queue; |
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s32 hicredit; |
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s32 locredit; |
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s32 idleslope; |
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s32 sendslope; |
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}; |
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struct tc_etf_qopt_offload { |
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u8 enable; |
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s32 queue; |
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}; |
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struct tc_taprio_sched_entry { |
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u8 command; /* TC_TAPRIO_CMD_* */ |
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/* The gate_mask in the offloading side refers to traffic classes */ |
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u32 gate_mask; |
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u32 interval; |
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}; |
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struct tc_taprio_qopt_offload { |
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u8 enable; |
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ktime_t base_time; |
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u64 cycle_time; |
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u64 cycle_time_extension; |
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size_t num_entries; |
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struct tc_taprio_sched_entry entries[]; |
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}; |
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/* Reference counting */ |
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struct tc_taprio_qopt_offload *taprio_offload_get(struct tc_taprio_qopt_offload |
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*offload); |
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void taprio_offload_free(struct tc_taprio_qopt_offload *offload); |
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/* Ensure skb_mstamp_ns, which might have been populated with the txtime, is |
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* not mistaken for a software timestamp, because this will otherwise prevent |
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* the dispatch of hardware timestamps to the socket. |
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*/ |
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static inline void skb_txtime_consumed(struct sk_buff *skb) |
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{ |
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skb->tstamp = ktime_set(0, 0); |
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} |
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#endif
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