net_io.h

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    1 /* 
    2  * Mach Operating System
    3  * Copyright (c) 1993,1992,1991,1990,1989 Carnegie Mellon University
    4  * All Rights Reserved.
    5  * 
    6  * Permission to use, copy, modify and distribute this software and its
    7  * documentation is hereby granted, provided that both the copyright
    8  * notice and this permission notice appear in all copies of the
    9  * software, derivative works or modified versions, and any portions
   10  * thereof, and that both notices appear in supporting documentation.
   11  * 
   12  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
   13  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
   14  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
   15  * 
   16  * Carnegie Mellon requests users of this software to return to
   17  * 
   18  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
   19  *  School of Computer Science
   20  *  Carnegie Mellon University
   21  *  Pittsburgh PA 15213-3890
   22  * 
   23  * any improvements or extensions that they make and grant Carnegie Mellon
   24  * the rights to redistribute these changes.
   25  */
   26 /*
   27  * HISTORY
   28  * $Log:        net_io.h,v $
   29  * Revision 2.9  93/11/17  16:34:24  dbg
   30  *      Added ANSI function prototypes.
   31  *      [93/01/08            dbg]
   32  * 
   33  * Revision 2.8  91/05/14  15:59:55  mrt
   34  *      Correcting copyright
   35  * 
   36  * Revision 2.7  91/03/16  14:43:26  rpd
   37  *      Added net_packet.
   38  *      [91/01/14            rpd]
   39  * 
   40  * Revision 2.6  91/02/05  17:10:03  mrt
   41  *      Changed to new Mach copyright
   42  *      [91/01/31  17:30:15  mrt]
   43  * 
   44  * Revision 2.5  91/01/08  15:09:56  rpd
   45  *      Replaced NET_KMSG_GET, NET_KMSG_FREE
   46  *      with net_kmsg_get, net_kmsg_put, net_kmsg_collect.
   47  *      [91/01/05            rpd]
   48  * 
   49  * Revision 2.4  90/06/02  14:48:20  rpd
   50  *      Converted to new IPC.
   51  *      [90/03/26  21:58:23  rpd]
   52  * 
   53  * Revision 2.3  90/02/22  20:02:26  dbg
   54  *      kmsg->queue_head becomds kmsg->chain.
   55  *      [90/01/25            dbg]
   56  * 
   57  * Revision 2.2  90/01/11  11:42:26  dbg
   58  *      Make run in parallel.
   59  *      [89/11/27            dbg]
   60  * 
   61  */
   62 /*
   63  *      Author: David B. Golub, Carnegie Mellon University
   64  *      Date:   ll/89
   65  */
   66 
   67 #ifndef _DEVICE_NET_IO_H_
   68 #define _DEVICE_NET_IO_H_
   69 
   70 /*
   71  * Utilities for playing with network messages.
   72  */
   73 
   74 #include <mach/machine/vm_types.h>
   75 #include <ipc/ipc_kmsg.h>
   76 
   77 #include <kern/macro_help.h>
   78 #include <kern/lock.h>
   79 #include <kern/kalloc.h>
   80 
   81 #include <device/net_status.h>
   82 #include <device/if_hdr.h>
   83 #include <device/io_req.h>
   84 
   85 /*
   86  * A network packet is wrapped in a kernel message while in
   87  * the kernel.
   88  */
   89 
   90 #define net_kmsg(kmsg)  ((net_rcv_msg_t)&(kmsg)->ikm_header)
   91 
   92 /*
   93  * Interrupt routines may allocate and free net_kmsgs with these
   94  * functions.  net_kmsg_get may return IKM_NULL.
   95  */
   96 
   97 extern ipc_kmsg_t net_kmsg_get(void);
   98 extern void net_kmsg_put(ipc_kmsg_t);
   99 
  100 /*
  101  * Non-interrupt code may allocate and free net_kmsgs with these functions.
  102  */
  103 
  104 extern vm_size_t net_kmsg_size;
  105 
  106 #define net_kmsg_alloc()        ((ipc_kmsg_t) kalloc(net_kmsg_size))
  107 #define net_kmsg_free(kmsg)     kfree((vm_offset_t) (kmsg), net_kmsg_size)
  108 
  109 /*
  110  * This routine may be called to recycle unneeded net_kmsgs
  111  * to the general message pool.
  112  */
  113 extern void net_kmsg_collect(void);
  114 
  115 /*
  116  * Network messages are sent to receive ports at AST time.
  117  */
  118 extern void net_ast(void);
  119 
  120 
  121 /*
  122  * Network utility routines.
  123  */
  124 
  125 extern void net_packet(
  126         struct ifnet *  ifp,
  127         ipc_kmsg_t      kmsg,
  128         unsigned int    count,
  129         boolean_t       priority);
  130 
  131 extern void net_filter(
  132         ipc_kmsg_t      kmsg,
  133         ipc_kmsg_queue_t send_list);
  134 
  135 extern io_return_t net_getstat(
  136         struct ifnet *  ifp,
  137         dev_flavor_t    flavor,
  138         dev_status_t    status,
  139         natural_t       *count);
  140 
  141 extern io_return_t net_write(
  142         struct ifnet *  ifp,
  143         void            (*start)(int),
  144         io_req_t        ior);
  145 
  146 #endif  /* _DEVICE_NET_IO_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/device/net_io.h

FreeBSD/Linux Kernel Cross Reference
sys/device/net_io.h