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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); |
efe074c2 ED |
78 | |
79 | void qdisc_watchdog_schedule_range_ns(struct qdisc_watchdog *wd, u64 expires, | |
80 | u64 delta_ns); | |
81 | ||
82 | static inline void qdisc_watchdog_schedule_ns(struct qdisc_watchdog *wd, | |
83 | u64 expires) | |
84 | { | |
85 | return qdisc_watchdog_schedule_range_ns(wd, expires, 0ULL); | |
86 | } | |
34c5d292 JP |
87 | |
88 | static inline void qdisc_watchdog_schedule(struct qdisc_watchdog *wd, | |
89 | psched_time_t expires) | |
90 | { | |
45f50bed | 91 | qdisc_watchdog_schedule_ns(wd, PSCHED_TICKS2NS(expires)); |
34c5d292 JP |
92 | } |
93 | ||
5c15257f | 94 | void qdisc_watchdog_cancel(struct qdisc_watchdog *wd); |
4179477f | 95 | |
1da177e4 LT |
96 | extern struct Qdisc_ops pfifo_qdisc_ops; |
97 | extern struct Qdisc_ops bfifo_qdisc_ops; | |
57dbb2d8 | 98 | extern struct Qdisc_ops pfifo_head_drop_qdisc_ops; |
1da177e4 | 99 | |
5c15257f JP |
100 | int fifo_set_limit(struct Qdisc *q, unsigned int limit); |
101 | struct Qdisc *fifo_create_dflt(struct Qdisc *sch, struct Qdisc_ops *ops, | |
a38a9882 AA |
102 | unsigned int limit, |
103 | struct netlink_ext_ack *extack); | |
5c15257f JP |
104 | |
105 | int register_qdisc(struct Qdisc_ops *qops); | |
106 | int unregister_qdisc(struct Qdisc_ops *qops); | |
6da7c8fc | 107 | void qdisc_get_default(char *id, size_t len); |
108 | int qdisc_set_default(const char *id); | |
109 | ||
49b49971 | 110 | void qdisc_hash_add(struct Qdisc *q, bool invisible); |
59cc1f61 | 111 | void qdisc_hash_del(struct Qdisc *q); |
5c15257f | 112 | struct Qdisc *qdisc_lookup(struct net_device *dev, u32 handle); |
3a7d0d07 | 113 | struct Qdisc *qdisc_lookup_rcu(struct net_device *dev, u32 handle); |
5c15257f | 114 | struct qdisc_rate_table *qdisc_get_rtab(struct tc_ratespec *r, |
e9bc3fa2 AA |
115 | struct nlattr *tab, |
116 | struct netlink_ext_ack *extack); | |
5c15257f JP |
117 | void qdisc_put_rtab(struct qdisc_rate_table *tab); |
118 | void qdisc_put_stab(struct qdisc_size_table *tab); | |
6e765a00 | 119 | void qdisc_warn_nonwc(const char *txt, struct Qdisc *qdisc); |
29b86cda JF |
120 | bool sch_direct_xmit(struct sk_buff *skb, struct Qdisc *q, |
121 | struct net_device *dev, struct netdev_queue *txq, | |
122 | spinlock_t *root_lock, bool validate); | |
5c15257f JP |
123 | |
124 | void __qdisc_run(struct Qdisc *q); | |
1da177e4 | 125 | |
37437bb2 | 126 | static inline void qdisc_run(struct Qdisc *q) |
1da177e4 | 127 | { |
6c148184 | 128 | if (qdisc_run_begin(q)) { |
d518d2ed PA |
129 | /* NOLOCK qdisc must check 'state' under the qdisc seqlock |
130 | * to avoid racing with dev_qdisc_reset() | |
131 | */ | |
132 | if (!(q->flags & TCQ_F_NOLOCK) || | |
133 | likely(!test_bit(__QDISC_STATE_DEACTIVATED, &q->state))) | |
134 | __qdisc_run(q); | |
6c148184 JF |
135 | qdisc_run_end(q); |
136 | } | |
d8b9605d JP |
137 | } |
138 | ||
1da177e4 LT |
139 | /* Calculate maximal size of packet seen by hard_start_xmit |
140 | routine of this device. | |
141 | */ | |
95c96174 | 142 | static inline unsigned int psched_mtu(const struct net_device *dev) |
1da177e4 | 143 | { |
3b04ddde | 144 | return dev->mtu + dev->hard_header_len; |
1da177e4 LT |
145 | } |
146 | ||
855319be JP |
147 | static inline struct net *qdisc_net(struct Qdisc *q) |
148 | { | |
149 | return dev_net(q->dev_queue->dev); | |
150 | } | |
151 | ||
3d0bd028 VCG |
152 | struct tc_cbs_qopt_offload { |
153 | u8 enable; | |
154 | s32 queue; | |
155 | s32 hicredit; | |
156 | s32 locredit; | |
157 | s32 idleslope; | |
158 | s32 sendslope; | |
159 | }; | |
160 | ||
88cab771 JSP |
161 | struct tc_etf_qopt_offload { |
162 | u8 enable; | |
163 | s32 queue; | |
164 | }; | |
165 | ||
9c66d156 VCG |
166 | struct tc_taprio_sched_entry { |
167 | u8 command; /* TC_TAPRIO_CMD_* */ | |
168 | ||
169 | /* The gate_mask in the offloading side refers to traffic classes */ | |
170 | u32 gate_mask; | |
171 | u32 interval; | |
172 | }; | |
173 | ||
174 | struct tc_taprio_qopt_offload { | |
175 | u8 enable; | |
176 | ktime_t base_time; | |
177 | u64 cycle_time; | |
178 | u64 cycle_time_extension; | |
179 | ||
180 | size_t num_entries; | |
b90feaff | 181 | struct tc_taprio_sched_entry entries[]; |
9c66d156 VCG |
182 | }; |
183 | ||
184 | /* Reference counting */ | |
185 | struct tc_taprio_qopt_offload *taprio_offload_get(struct tc_taprio_qopt_offload | |
186 | *offload); | |
187 | void taprio_offload_free(struct tc_taprio_qopt_offload *offload); | |
188 | ||
1da177e4 | 189 | #endif |