bsd/net/pktsched/pktsched.h

   1 /*
   2  * Copyright (c) 2011-2016 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 #ifndef _PKTSCHED_PKTSCHED_H_
  30 #define _PKTSCHED_PKTSCHED_H_
  31
  32 #ifdef PRIVATE
  33 #ifdef __cplusplus
  34 extern "C" {
  35 #endif
  36
  37 /* packet scheduler type */
  38 #define PKTSCHEDT_NONE          0       /* reserved */
  39 #define PKTSCHEDT_CBQ           1       /* cbq */
  40 #define PKTSCHEDT_HFSC          2       /* hfsc */
  41 #define PKTSCHEDT_PRIQ          3       /* priority queue */
  42 #define PKTSCHEDT_FAIRQ         4       /* fairq */
  43 #define PKTSCHEDT_TCQ           5       /* traffic class queue */
  44 #define PKTSCHEDT_QFQ           6       /* quick fair queueing */
  45 #define PKTSCHEDT_FQ_CODEL      7       /* Flow queues with CoDel */
  46 #define PKTSCHEDT_MAX           8       /* should be max sched type + 1 */
  47
  48 #ifdef BSD_KERNEL_PRIVATE
  49 #include <mach/mach_time.h>
  50 #include <sys/sysctl.h>
  51 #include <libkern/libkern.h>
  52
  53 /* flags for pktsched_setup */
  54 #define PKTSCHEDF_QALG_SFB      0x01    /* use SFB */
  55 #define PKTSCHEDF_QALG_ECN      0x02    /* enable ECN */
  56 #define PKTSCHEDF_QALG_FLOWCTL  0x04    /* enable flow control advisories */
  57 #define PKTSCHEDF_QALG_DELAYBASED       0x08    /* Delay based queueing */
  58 #define PKTSCHEDF_QALG_DRIVER_MANAGED   0x10    /* driver managed */
  59
  60 typedef struct _pktsched_pkt_ {
  61         classq_pkt_type_t       __ptype;
  62         uint32_t                __plen;
  63         void                    *__pkt;
  64 #define pktsched_ptype  __ptype
  65 #define pktsched_plen   __plen
  66 #define pktsched_pkt    __pkt
  67 } pktsched_pkt_t;
  68
  69 #define _PKTSCHED_PKT_INIT(_p)  do {            \
  70         (_p)->pktsched_ptype = QP_INVALID;      \
  71         (_p)->pktsched_plen = 0;                \
  72         (_p)->pktsched_pkt = NULL;              \
  73 } while (0)
  74
  75 /* macro for timeout/untimeout */
  76 /* use old-style timeout/untimeout */
  77 /* dummy callout structure */
  78 struct callout {
  79         void            *c_arg;                 /* function argument */
  80         void            (*c_func)(void *);      /* function to call */
  81 };
  82
  83 #define CALLOUT_INIT(c) do {                                    \
  84         (void) memset((c), 0, sizeof (*(c)));                   \
  85 } while ( /*CONSTCOND*/ 0)
  86
  87 #define CALLOUT_RESET(c, t, f, a) do {                          \
  88         (c)->c_arg = (a);                                       \
  89         (c)->c_func = (f);                                      \
  90         timeout((f), (a), (t));                                 \
  91 } while ( /*CONSTCOND*/ 0)
  92
  93 #define CALLOUT_STOP(c)         untimeout((c)->c_func, (c)->c_arg)
  94 #define CALLOUT_INITIALIZER     { NULL, NULL }
  95
  96 typedef void (timeout_t)(void *);
  97
  98 /*
  99  * Bitmap operations
 100  */
 101 typedef u_int32_t pktsched_bitmap_t;
 102
 103 static inline boolean_t
 104 pktsched_bit_tst(u_int32_t ix, pktsched_bitmap_t *pData)
 105 {
 106         return *pData & (1 << ix);
 107 }
 108
 109 static inline void
 110 pktsched_bit_set(u_int32_t ix, pktsched_bitmap_t *pData)
 111 {
 112         *pData |= (1 << ix);
 113 }
 114
 115 static inline void
 116 pktsched_bit_clr(u_int32_t ix, pktsched_bitmap_t *pData)
 117 {
 118         *pData &= ~(1 << ix);
 119 }
 120
 121 static inline pktsched_bitmap_t
 122 pktsched_ffs(pktsched_bitmap_t pData)
 123 {
 124         return ffs(pData);
 125 }
 126
 127 static inline pktsched_bitmap_t
 128 pktsched_fls(pktsched_bitmap_t pData)
 129 {
 130         return (sizeof(pktsched_bitmap_t) << 3) - clz(pData);
 131 }
 132
 133 static inline pktsched_bitmap_t
 134 __fls(pktsched_bitmap_t word)
 135 {
 136         VERIFY(word != 0);
 137         return pktsched_fls(word) - 1;
 138 }
 139
 140 /*
 141  * We can use mach_absolute_time which returns a 64-bit value with
 142  * granularity less than a microsecond even on the slowest processor.
 143  */
 144 #define read_machclk()          mach_absolute_time()
 145
 146 /*
 147  * machine dependent clock
 148  * a 64bit high resolution time counter.
 149  */
 150 extern u_int32_t machclk_freq;
 151 extern u_int64_t machclk_per_sec;
 152 extern u_int32_t pktsched_verbose;
 153
 154 SYSCTL_DECL(_net_pktsched);
 155
 156 struct if_ifclassq_stats;
 157
 158 extern void pktsched_init(void);
 159 extern int pktsched_setup(struct ifclassq *, u_int32_t, u_int32_t,
 160     classq_pkt_type_t);
 161 extern int pktsched_teardown(struct ifclassq *);
 162 extern int pktsched_getqstats(struct ifclassq *, u_int32_t,
 163     struct if_ifclassq_stats *);
 164 extern u_int64_t pktsched_abs_to_nsecs(u_int64_t);
 165 extern u_int64_t pktsched_nsecs_to_abstime(u_int64_t);
 166 extern void pktsched_free_pkt(pktsched_pkt_t *);
 167 extern uint32_t pktsched_get_pkt_len(pktsched_pkt_t *);
 168 extern void pktsched_get_pkt_vars(pktsched_pkt_t *, uint32_t **, uint64_t **,
 169     uint32_t *, uint8_t *, uint8_t *, uint32_t *);
 170 extern uint32_t *pktsched_get_pkt_sfb_vars(pktsched_pkt_t *, uint32_t **);
 171 extern void pktsched_pkt_encap(pktsched_pkt_t *, classq_pkt_type_t, void *);
 172 extern mbuf_svc_class_t pktsched_get_pkt_svc(pktsched_pkt_t *);
 173 extern struct flowadv_fcentry *pktsched_alloc_fcentry(pktsched_pkt_t *,
 174     struct ifnet *, int);
 175 #endif /* BSD_KERNEL_PRIVATE */
 176
 177 #ifdef __cplusplus
 178 }
 179 #endif
 180 #endif /* PRIVATE */
 181 #endif /* _PKTSCHED_PKTSCHED_H_ */