Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef __NET_PKT_SCHED_H |
3 | #define __NET_PKT_SCHED_H | |
4 | ||
538e43a4 | 5 | #include <linux/jiffies.h> |
641b9e0e | 6 | #include <linux/ktime.h> |
d8b9605d | 7 | #include <linux/if_vlan.h> |
855319be | 8 | #include <linux/netdevice.h> |
1da177e4 | 9 | #include <net/sch_generic.h> |
855319be | 10 | #include <net/net_namespace.h> |
861932ec | 11 | #include <uapi/linux/pkt_sched.h> |
1da177e4 | 12 | |
d0a81f67 JDB |
13 | #define DEFAULT_TX_QUEUE_LEN 1000 |
14 | ||
fd2c3ef7 | 15 | struct qdisc_walker { |
1da177e4 LT |
16 | int stop; |
17 | int skip; | |
18 | int count; | |
19 | int (*fn)(struct Qdisc *, unsigned long cl, struct qdisc_walker *); | |
20 | }; | |
21 | ||
5d944c64 | 22 | #define QDISC_ALIGNTO 64 |
3d54b82f | 23 | #define QDISC_ALIGN(len) (((len) + QDISC_ALIGNTO-1) & ~(QDISC_ALIGNTO-1)) |
1da177e4 LT |
24 | |
25 | static inline void *qdisc_priv(struct Qdisc *q) | |
26 | { | |
3d54b82f | 27 | return (char *) q + QDISC_ALIGN(sizeof(struct Qdisc)); |
1da177e4 LT |
28 | } |
29 | ||
30 | /* | |
31 | Timer resolution MUST BE < 10% of min_schedulable_packet_size/bandwidth | |
32 | ||
33 | Normal IP packet size ~ 512byte, hence: | |
34 | ||
35 | 0.5Kbyte/1Mbyte/sec = 0.5msec, so that we need 50usec timer for | |
36 | 10Mbit ethernet. | |
37 | ||
38 | 10msec resolution -> <50Kbit/sec. | |
39 | ||
40 | The result: [34]86 is not good choice for QoS router :-( | |
41 | ||
25985edc | 42 | The things are not so bad, because we may use artificial |
1da177e4 LT |
43 | clock evaluated by integration of network data flow |
44 | in the most critical places. | |
1da177e4 LT |
45 | */ |
46 | ||
1da177e4 LT |
47 | typedef u64 psched_time_t; |
48 | typedef long psched_tdiff_t; | |
49 | ||
a4a710c4 JP |
50 | /* Avoid doing 64 bit divide */ |
51 | #define PSCHED_SHIFT 6 | |
ca44d6e6 JP |
52 | #define PSCHED_TICKS2NS(x) ((s64)(x) << PSCHED_SHIFT) |
53 | #define PSCHED_NS2TICKS(x) ((x) >> PSCHED_SHIFT) | |
1da177e4 | 54 | |
ca44d6e6 | 55 | #define PSCHED_TICKS_PER_SEC PSCHED_NS2TICKS(NSEC_PER_SEC) |
a084980d | 56 | #define PSCHED_PASTPERFECT 0 |
1da177e4 | 57 | |
3bebcda2 PM |
58 | static inline psched_time_t psched_get_time(void) |
59 | { | |
d2de875c | 60 | return PSCHED_NS2TICKS(ktime_get_ns()); |
3bebcda2 PM |
61 | } |
62 | ||
03cc45c0 PM |
63 | static inline psched_tdiff_t |
64 | psched_tdiff_bounded(psched_time_t tv1, psched_time_t tv2, psched_time_t bound) | |
65 | { | |
66 | return min(tv1 - tv2, bound); | |
67 | } | |
68 | ||
4179477f | 69 | struct qdisc_watchdog { |
a9efad8b | 70 | u64 last_expires; |
4179477f PM |
71 | struct hrtimer timer; |
72 | struct Qdisc *qdisc; | |
73 | }; | |
74 | ||
860b642b VCG |
75 | void qdisc_watchdog_init_clockid(struct qdisc_watchdog *wd, struct Qdisc *qdisc, |
76 | clockid_t clockid); | |
5c15257f | 77 | void qdisc_watchdog_init(struct qdisc_watchdog *wd, struct Qdisc *qdisc); |
45f50bed | 78 | void qdisc_watchdog_schedule_ns(struct qdisc_watchdog *wd, u64 expires); |
34c5d292 JP |
79 | |
80 | static inline void qdisc_watchdog_schedule(struct qdisc_watchdog *wd, | |
81 | psched_time_t expires) | |
82 | { | |
45f50bed | 83 | qdisc_watchdog_schedule_ns(wd, PSCHED_TICKS2NS(expires)); |
34c5d292 JP |
84 | } |
85 | ||
5c15257f | 86 | void qdisc_watchdog_cancel(struct qdisc_watchdog *wd); |
4179477f | 87 | |
1da177e4 LT |
88 | extern struct Qdisc_ops pfifo_qdisc_ops; |
89 | extern struct Qdisc_ops bfifo_qdisc_ops; | |
57dbb2d8 | 90 | extern struct Qdisc_ops pfifo_head_drop_qdisc_ops; |
1da177e4 | 91 | |
5c15257f JP |
92 | int fifo_set_limit(struct Qdisc *q, unsigned int limit); |
93 | struct Qdisc *fifo_create_dflt(struct Qdisc *sch, struct Qdisc_ops *ops, | |
a38a9882 AA |
94 | unsigned int limit, |
95 | struct netlink_ext_ack *extack); | |
5c15257f JP |
96 | |
97 | int register_qdisc(struct Qdisc_ops *qops); | |
98 | int unregister_qdisc(struct Qdisc_ops *qops); | |
6da7c8fc | 99 | void qdisc_get_default(char *id, size_t len); |
100 | int qdisc_set_default(const char *id); | |
101 | ||
49b49971 | 102 | void qdisc_hash_add(struct Qdisc *q, bool invisible); |
59cc1f61 | 103 | void qdisc_hash_del(struct Qdisc *q); |
5c15257f | 104 | struct Qdisc *qdisc_lookup(struct net_device *dev, u32 handle); |
5c15257f | 105 | struct qdisc_rate_table *qdisc_get_rtab(struct tc_ratespec *r, |
e9bc3fa2 AA |
106 | struct nlattr *tab, |
107 | struct netlink_ext_ack *extack); | |
5c15257f JP |
108 | void qdisc_put_rtab(struct qdisc_rate_table *tab); |
109 | void qdisc_put_stab(struct qdisc_size_table *tab); | |
6e765a00 | 110 | void qdisc_warn_nonwc(const char *txt, struct Qdisc *qdisc); |
29b86cda JF |
111 | bool sch_direct_xmit(struct sk_buff *skb, struct Qdisc *q, |
112 | struct net_device *dev, struct netdev_queue *txq, | |
113 | spinlock_t *root_lock, bool validate); | |
5c15257f JP |
114 | |
115 | void __qdisc_run(struct Qdisc *q); | |
1da177e4 | 116 | |
37437bb2 | 117 | static inline void qdisc_run(struct Qdisc *q) |
1da177e4 | 118 | { |
6c148184 | 119 | if (qdisc_run_begin(q)) { |
37437bb2 | 120 | __qdisc_run(q); |
6c148184 JF |
121 | qdisc_run_end(q); |
122 | } | |
1da177e4 LT |
123 | } |
124 | ||
d8b9605d JP |
125 | static inline __be16 tc_skb_protocol(const struct sk_buff *skb) |
126 | { | |
127 | /* We need to take extra care in case the skb came via | |
128 | * vlan accelerated path. In that case, use skb->vlan_proto | |
129 | * as the original vlan header was already stripped. | |
130 | */ | |
df8a39de | 131 | if (skb_vlan_tag_present(skb)) |
d8b9605d JP |
132 | return skb->vlan_proto; |
133 | return skb->protocol; | |
134 | } | |
135 | ||
1da177e4 LT |
136 | /* Calculate maximal size of packet seen by hard_start_xmit |
137 | routine of this device. | |
138 | */ | |
95c96174 | 139 | static inline unsigned int psched_mtu(const struct net_device *dev) |
1da177e4 | 140 | { |
3b04ddde | 141 | return dev->mtu + dev->hard_header_len; |
1da177e4 LT |
142 | } |
143 | ||
855319be JP |
144 | static inline struct net *qdisc_net(struct Qdisc *q) |
145 | { | |
146 | return dev_net(q->dev_queue->dev); | |
147 | } | |
148 | ||
3d0bd028 VCG |
149 | struct tc_cbs_qopt_offload { |
150 | u8 enable; | |
151 | s32 queue; | |
152 | s32 hicredit; | |
153 | s32 locredit; | |
154 | s32 idleslope; | |
155 | s32 sendslope; | |
156 | }; | |
157 | ||
88cab771 JSP |
158 | struct tc_etf_qopt_offload { |
159 | u8 enable; | |
160 | s32 queue; | |
161 | }; | |
162 | ||
1da177e4 | 163 | #endif |