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#ifndef __NET_PKT_SCHED_H

#define __NET_PKT_SCHED_H

#define PSCHED_GETTIMEOFDAY     1

#define PSCHED_JIFFIES          2

#define PSCHED_CPU              3

#define PSCHED_CLOCK_SOURCE     PSCHED_JIFFIES

#include <linux/config.h>

#include <linux/types.h>

#include <linux/pkt_sched.h>

#include <net/pkt_cls.h>

#ifdef CONFIG_X86_TSC

#include <asm/msr.h>

#endif

struct rtattr;

struct Qdisc;

struct qdisc_walker

{

        int     stop;

        int     skip;

        int     count;

        int     (*fn)(struct Qdisc *, unsigned long cl, struct qdisc_walker *);

};

struct Qdisc_class_ops

{

        /* Child qdisc manipulation */

        int                     (*graft)(struct Qdisc *, unsigned long cl, struct Qdisc *, struct Qdisc **);

        struct Qdisc *          (*leaf)(struct Qdisc *, unsigned long cl);

        /* Class manipulation routines */

        unsigned long           (*get)(struct Qdisc *, u32 classid);

        void                    (*put)(struct Qdisc *, unsigned long);

        int                     (*change)(struct Qdisc *, u32, u32, struct rtattr **, unsigned long *);

        int                     (*delete)(struct Qdisc *, unsigned long);

        void                    (*walk)(struct Qdisc *, struct qdisc_walker * arg);

        /* Filter manipulation */

        struct tcf_proto **     (*tcf_chain)(struct Qdisc *, unsigned long);

        unsigned long           (*bind_tcf)(struct Qdisc *, unsigned long, u32 classid);

        void                    (*unbind_tcf)(struct Qdisc *, unsigned long);

        /* rtnetlink specific */

        int                     (*dump)(struct Qdisc *, unsigned long, struct sk_buff *skb, struct tcmsg*);

};

struct Qdisc_ops

{

        struct Qdisc_ops        *next;

        struct Qdisc_class_ops  *cl_ops;

        char                    id[IFNAMSIZ];

        int                     priv_size;

        int                     (*enqueue)(struct sk_buff *, struct Qdisc *);

        struct sk_buff *        (*dequeue)(struct Qdisc *);

        int                     (*requeue)(struct sk_buff *, struct Qdisc *);

        unsigned int            (*drop)(struct Qdisc *);

        int                     (*init)(struct Qdisc *, struct rtattr *arg);

        void                    (*reset)(struct Qdisc *);

        void                    (*destroy)(struct Qdisc *);

        int                     (*change)(struct Qdisc *, struct rtattr *arg);

        int                     (*dump)(struct Qdisc *, struct sk_buff *);

};

extern rwlock_t qdisc_tree_lock;

struct Qdisc

{

        int                     (*enqueue)(struct sk_buff *skb, struct Qdisc *dev);

        struct sk_buff *        (*dequeue)(struct Qdisc *dev);

        unsigned                flags;

#define TCQ_F_BUILTIN   1

#define TCQ_F_THROTTLED 2

#define TCQ_F_INGRES    4

        struct Qdisc_ops        *ops;

        struct Qdisc            *next;

        u32                     handle;

        atomic_t                refcnt;

        struct sk_buff_head     q;

        struct net_device       *dev;

        struct tc_stats         stats;

        int                     (*reshape_fail)(struct sk_buff *skb, struct Qdisc *q);

        /* This field is deprecated, but it is still used by CBQ

         * and it will live until better solution will be invented.

         */

        struct Qdisc            *__parent;

        char                    data[0];

};

struct qdisc_rate_table

{

        struct tc_ratespec rate;

        u32             data[256];

        struct qdisc_rate_table *next;

        int             refcnt;

};

static inline void sch_tree_lock(struct Qdisc *q)

{

        write_lock(&qdisc_tree_lock);

        spin_lock_bh(&q->dev->queue_lock);

}

static inline void sch_tree_unlock(struct Qdisc *q)

{

        spin_unlock_bh(&q->dev->queue_lock);

        write_unlock(&qdisc_tree_lock);

}

static inline void tcf_tree_lock(struct tcf_proto *tp)

{

        write_lock(&qdisc_tree_lock);

        spin_lock_bh(&tp->q->dev->queue_lock);

}

static inline void tcf_tree_unlock(struct tcf_proto *tp)

{

        spin_unlock_bh(&tp->q->dev->queue_lock);

        write_unlock(&qdisc_tree_lock);

}

static inline unsigned long

cls_set_class(struct tcf_proto *tp, unsigned long *clp, unsigned long cl)

{

        unsigned long old_cl;

        tcf_tree_lock(tp);

        old_cl = *clp;

        *clp = cl;

        tcf_tree_unlock(tp);

        return old_cl;

}

static inline unsigned long

__cls_set_class(unsigned long *clp, unsigned long cl)

{

        unsigned long old_cl;

        old_cl = *clp;

        *clp = cl;

        return old_cl;

}

/*

   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 artifical

   clock evaluated by integration of network data flow

   in the most critical places.

   Note: we do not use fastgettimeofday.

   The reason is that, when it is not the same thing as

   gettimeofday, it returns invalid timestamp, which is

   not updated, when net_bh is active.

   So, use PSCHED_CLOCK_SOURCE = PSCHED_CPU on alpha and pentiums

   with rtdsc. And PSCHED_JIFFIES on all other architectures, including [34]86

   and pentiums without rtdsc.

   You can use PSCHED_GETTIMEOFDAY on another architectures,

   which have fast and precise clock source, but it is too expensive.

 */

/* General note about internal clock.

   Any clock source returns time intervals, measured in units

   close to 1usec. With source PSCHED_GETTIMEOFDAY it is precisely

   microseconds, otherwise something close but different chosen to minimize

   arithmetic cost. Ratio usec/internal untis in form nominator/denominator

   may be read from /proc/net/psched.

 */

#if PSCHED_CLOCK_SOURCE == PSCHED_GETTIMEOFDAY

typedef struct timeval  psched_time_t;

typedef long            psched_tdiff_t;

#define PSCHED_GET_TIME(stamp) do_gettimeofday(&(stamp))

#define PSCHED_US2JIFFIE(usecs) (((usecs)+(1000000/HZ-1))/(1000000/HZ))

#define PSCHED_JIFFIE2US(delay) ((delay)*(1000000/HZ))

#define PSCHED_EXPORTLIST EXPORT_SYMBOL(psched_tod_diff);

#else /* PSCHED_CLOCK_SOURCE != PSCHED_GETTIMEOFDAY */

#define PSCHED_EXPORTLIST PSCHED_EXPORTLIST_1 PSCHED_EXPORTLIST_2

typedef u64     psched_time_t;

typedef long    psched_tdiff_t;

extern psched_time_t    psched_time_base;

#if PSCHED_CLOCK_SOURCE == PSCHED_JIFFIES

#if HZ < 96

#define PSCHED_JSCALE 14

#elif HZ >= 96 && HZ < 192

#define PSCHED_JSCALE 13

#elif HZ >= 192 && HZ < 384

#define PSCHED_JSCALE 12

#elif HZ >= 384 && HZ < 768

#define PSCHED_JSCALE 11

#elif HZ >= 768

#define PSCHED_JSCALE 10

#endif

#define PSCHED_EXPORTLIST_2

#if BITS_PER_LONG <= 32

#define PSCHED_WATCHER unsigned long

extern PSCHED_WATCHER psched_time_mark;

#define PSCHED_GET_TIME(stamp) ((stamp) = psched_time_base + (((unsigned long)(jiffies-psched_time_mark))<<PSCHED_JSCALE))

#define PSCHED_EXPORTLIST_1 EXPORT_SYMBOL(psched_time_base); \

                            EXPORT_SYMBOL(psched_time_mark);

#else

#define PSCHED_GET_TIME(stamp) ((stamp) = (jiffies<<PSCHED_JSCALE))

#define PSCHED_EXPORTLIST_1 

#endif

#define PSCHED_US2JIFFIE(delay) (((delay)+(1<<PSCHED_JSCALE)-1)>>PSCHED_JSCALE)

#define PSCHED_JIFFIE2US(delay) ((delay)<<PSCHED_JSCALE)

#elif PSCHED_CLOCK_SOURCE == PSCHED_CPU

extern psched_tdiff_t psched_clock_per_hz;

extern int psched_clock_scale;

#define PSCHED_EXPORTLIST_2 EXPORT_SYMBOL(psched_clock_per_hz); \

                            EXPORT_SYMBOL(psched_clock_scale);

#define PSCHED_US2JIFFIE(delay) (((delay)+psched_clock_per_hz-1)/psched_clock_per_hz)

#define PSCHED_JIFFIE2US(delay) ((delay)*psched_clock_per_hz)

#ifdef CONFIG_X86_TSC

#define PSCHED_GET_TIME(stamp) \

({ u64 __cur; \

   rdtscll(__cur); \

   (stamp) = __cur>>psched_clock_scale; \

})

#define PSCHED_EXPORTLIST_1

#elif defined (__alpha__)

#define PSCHED_WATCHER u32

extern PSCHED_WATCHER psched_time_mark;

#define PSCHED_GET_TIME(stamp) \

({ u32 __res; \

   __asm__ __volatile__ ("rpcc %0" : "r="(__res)); \

   if (__res <= psched_time_mark) psched_time_base += 0x100000000UL; \

   psched_time_mark = __res; \

   (stamp) = (psched_time_base + __res)>>psched_clock_scale; \

})

#define PSCHED_EXPORTLIST_1 EXPORT_SYMBOL(psched_time_base); \

                            EXPORT_SYMBOL(psched_time_mark);

#else

#error PSCHED_CLOCK_SOURCE=PSCHED_CPU is not supported on this arch.

#endif /* ARCH */

#endif /* PSCHED_CLOCK_SOURCE == PSCHED_JIFFIES */

#endif /* PSCHED_CLOCK_SOURCE == PSCHED_GETTIMEOFDAY */

#if PSCHED_CLOCK_SOURCE == PSCHED_GETTIMEOFDAY

#define PSCHED_TDIFF(tv1, tv2) \

({ \

           int __delta_sec = (tv1).tv_sec - (tv2).tv_sec; \

           int __delta = (tv1).tv_usec - (tv2).tv_usec; \

           if (__delta_sec) { \

                   switch (__delta_sec) { \

                   default: \

                           __delta = 0; \

                   case 2: \

                           __delta += 1000000; \

                   case 1: \

                           __delta += 1000000; \

                   } \

           } \

           __delta; \

})

extern int psched_tod_diff(int delta_sec, int bound);

#define PSCHED_TDIFF_SAFE(tv1, tv2, bound, guard) \

({ \

           int __delta_sec = (tv1).tv_sec - (tv2).tv_sec; \

           int __delta = (tv1).tv_usec - (tv2).tv_usec; \

           switch (__delta_sec) { \

           default: \

                   __delta = psched_tod_diff(__delta_sec, bound); guard; break; \

           case 2: \

                   __delta += 1000000; \

           case 1: \

                   __delta += 1000000; \

           case 0: ; \

           } \

           __delta; \

})

#define PSCHED_TLESS(tv1, tv2) (((tv1).tv_usec < (tv2).tv_usec && \

                                (tv1).tv_sec <= (tv2).tv_sec) || \

                                 (tv1).tv_sec < (tv2).tv_sec)

#define PSCHED_TADD2(tv, delta, tv_res) \

({ \

           int __delta = (tv).tv_usec + (delta); \

           (tv_res).tv_sec = (tv).tv_sec; \

           if (__delta > 1000000) { (tv_res).tv_sec++; __delta -= 1000000; } \

           (tv_res).tv_usec = __delta; \

})

#define PSCHED_TADD(tv, delta) \

({ \

           (tv).tv_usec += (delta); \

           if ((tv).tv_usec > 1000000) { (tv).tv_sec++; \

                 (tv).tv_usec -= 1000000; } \

})

/* Set/check that time is in the "past perfect";

   it depends on concrete representation of system time

 */

#define PSCHED_SET_PASTPERFECT(t)       ((t).tv_sec = 0)

#define PSCHED_IS_PASTPERFECT(t)        ((t).tv_sec == 0)

#define PSCHED_AUDIT_TDIFF(t) ({ if ((t) > 2000000) (t) = 2000000; })

#else

#define PSCHED_TDIFF(tv1, tv2) (long)((tv1) - (tv2))

#define PSCHED_TDIFF_SAFE(tv1, tv2, bound, guard) \

({ \

           long long __delta = (tv1) - (tv2); \

           if ( __delta > (long long)(bound)) {  __delta = (bound); guard; } \

           __delta; \

})

#define PSCHED_TLESS(tv1, tv2) ((tv1) < (tv2))

#define PSCHED_TADD2(tv, delta, tv_res) ((tv_res) = (tv) + (delta))

#define PSCHED_TADD(tv, delta) ((tv) += (delta))

#define PSCHED_SET_PASTPERFECT(t)       ((t) = 0)

#define PSCHED_IS_PASTPERFECT(t)        ((t) == 0)

#define PSCHED_AUDIT_TDIFF(t)

#endif

struct tcf_police

{

        struct tcf_police *next;

        int             refcnt;

        u32             index;

        int             action;

        int             result;

        u32             ewma_rate;

        u32             burst;

        u32             mtu;

        u32             toks;

        u32             ptoks;

        psched_time_t   t_c;

        spinlock_t      lock;

        struct qdisc_rate_table *R_tab;

        struct qdisc_rate_table *P_tab;

        struct tc_stats stats;

};

extern int qdisc_copy_stats(struct sk_buff *skb, struct tc_stats *st);

extern void tcf_police_destroy(struct tcf_police *p);

extern struct tcf_police * tcf_police_locate(struct rtattr *rta, struct rtattr *est);

extern int tcf_police_dump(struct sk_buff *skb, struct tcf_police *p);

extern int tcf_police(struct sk_buff *skb, struct tcf_police *p);

static inline void tcf_police_release(struct tcf_police *p)

{

        if (p && --p->refcnt == 0)

                tcf_police_destroy(p);

}

extern struct Qdisc noop_qdisc;

extern struct Qdisc_ops noop_qdisc_ops;

extern struct Qdisc_ops pfifo_qdisc_ops;

extern struct Qdisc_ops bfifo_qdisc_ops;

int register_qdisc(struct Qdisc_ops *qops);

int unregister_qdisc(struct Qdisc_ops *qops);

struct Qdisc *qdisc_lookup(struct net_device *dev, u32 handle);

struct Qdisc *qdisc_lookup_class(struct net_device *dev, u32 handle);

void dev_init_scheduler(struct net_device *dev);

void dev_shutdown(struct net_device *dev);

void dev_activate(struct net_device *dev);

void dev_deactivate(struct net_device *dev);

void qdisc_reset(struct Qdisc *qdisc);

void qdisc_destroy(struct Qdisc *qdisc);

struct Qdisc * qdisc_create_dflt(struct net_device *dev, struct Qdisc_ops *ops);

int qdisc_new_estimator(struct tc_stats *stats, struct rtattr *opt);

void qdisc_kill_estimator(struct tc_stats *stats);

struct qdisc_rate_table *qdisc_get_rtab(struct tc_ratespec *r, struct rtattr *tab);

void qdisc_put_rtab(struct qdisc_rate_table *tab);

int teql_init(void);

int tc_filter_init(void);

int pktsched_init(void);

extern int qdisc_restart(struct net_device *dev);

static inline void qdisc_run(struct net_device *dev)

{

        while (!netif_queue_stopped(dev) &&

               qdisc_restart(dev)<0)

                /* NOTHING */;

}

/* Calculate maximal size of packet seen by hard_start_xmit

   routine of this device.

 */

static inline unsigned psched_mtu(struct net_device *dev)

{

        unsigned mtu = dev->mtu;

        return dev->hard_header ? mtu + dev->hard_header_len : mtu;

}

#endif