release/src-rt/include/bcmgmacrxh.h

   1 /*
   2  * Hardware-specific Receive Data Header for the
   3  * Broadcom Home Networking Division
   4  * BCM47XX GbE cores.
   5  *
   6  * Copyright (C) 2010, Broadcom Corporation
   7  * All Rights Reserved.
   8  *
   9  * This is UNPUBLISHED PROPRIETARY SOURCE CODE of Broadcom Corporation;
  10  * the contents of this file may not be disclosed to third parties, copied
  11  * or duplicated in any form, in whole or in part, without the prior
  12  * written permission of Broadcom Corporation.
  13  * $Id: bcmgmacrxh.h,v 13.1 2008-07-18 00:29:07 Exp $
  14  */
  15
  16 #ifndef _bcmgmacrxh_h_
  17 #define _bcmgmacrxh_h_
  18
  19 /*
  20  * The Ethernet GMAC core returns an 8-byte Receive Frame Data Header
  21  * with every frame consisting of
  22  * 16 bits of frame length, followed by
  23  * 16 bits of GMAC rx descriptor info, followed by 32bits of undefined.
  24  */
  25 typedef volatile struct {
  26         uint16  len;
  27         uint16  flags;
  28         uint16  pad[12];
  29 } bcmgmacrxh_t;
  30
  31 #define RXHDR_LEN       28      /* Header length */
  32
  33 #define GRXF_DT_MASK    ((uint16)0xf)           /* data type */
  34 #define GRXF_DT_SHIFT   12
  35 #define GRXF_DC_MASK    ((uint16)0xf)           /* (num descr to xfer the frame) - 1 */
  36 #define GRXF_DC_SHIFT   8
  37 #define GRXF_OVF        ((uint16)1 << 7)        /* overflow error occured */
  38 #define GRXF_OVERSIZE   ((uint16)1 << 4)        /* frame size > rxmaxlength */
  39 #define GRXF_CRC        ((uint16)1 << 3)        /* crc error */
  40 #define GRXF_VLAN       ((uint16)1 << 2)        /* vlan tag detected */
  41 #define GRXF_PT_MASK    ((uint16)3)             /* packet type 0 - Unicast,
  42                                                  * 1 - Multicast, 2 - Broadcast
  43                                                  */
  44
  45 #endif  /* _bcmgmacrxh_h_ */