drivers/staging/octeon/ethernet-util.h

   1 /**********************************************************************
   2  * Author: Cavium Networks
   3  *
   4  * Contact: support@caviumnetworks.com
   5  * This file is part of the OCTEON SDK
   6  *
   7  * Copyright (c) 2003-2007 Cavium Networks
   8  *
   9  * This file is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License, Version 2, as
  11  * published by the Free Software Foundation.
  12  *
  13  * This file is distributed in the hope that it will be useful, but
  14  * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
  15  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
  16  * NONINFRINGEMENT.  See the GNU General Public License for more
  17  * details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this file; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  22  * or visit http://www.gnu.org/licenses/.
  23  *
  24  * This file may also be available under a different license from Cavium.
  25  * Contact Cavium Networks for more information
  26 *********************************************************************/
  27
  28 /**
  29  * cvm_oct_get_buffer_ptr - convert packet data address to pointer
  30  * @packet_ptr: Packet data hardware address
  31  *
  32  * Returns Packet buffer pointer
  33  */
  34 static inline void *cvm_oct_get_buffer_ptr(union cvmx_buf_ptr packet_ptr)
  35 {
  36         return cvmx_phys_to_ptr(((packet_ptr.s.addr >> 7) - packet_ptr.s.back)
  37                                 << 7);
  38 }
  39
  40 /**
  41  * INTERFACE - convert IPD port to logical interface
  42  * @ipd_port: Port to check
  43  *
  44  * Returns Logical interface
  45  */
  46 static inline int INTERFACE(int ipd_port)
  47 {
  48         if (ipd_port < 32)      /* Interface 0 or 1 for RGMII,GMII,SPI, etc */
  49                 return ipd_port >> 4;
  50         else if (ipd_port < 36) /* Interface 2 for NPI */
  51                 return 2;
  52         else if (ipd_port < 40) /* Interface 3 for loopback */
  53                 return 3;
  54         else if (ipd_port == 40)        /* Non existent interface for POW0 */
  55                 return 4;
  56         else
  57                 panic("Illegal ipd_port %d passed to INTERFACE\n", ipd_port);
  58 }
  59
  60 /**
  61  * INDEX - convert IPD/PKO port number to the port's interface index
  62  * @ipd_port: Port to check
  63  *
  64  * Returns Index into interface port list
  65  */
  66 static inline int INDEX(int ipd_port)
  67 {
  68         if (ipd_port < 32)
  69                 return ipd_port & 15;
  70         else
  71                 return ipd_port & 3;
  72 }