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 #define DEBUGPRINT(format, ...) do { if (printk_ratelimit())            \
  29                                         printk(format, ##__VA_ARGS__);  \
  30                                 } while (0)
  31
  32 /**
  33  * Given a packet data address, return a pointer to the
  34  * beginning of the packet buffer.
  35  *
  36  * @packet_ptr: Packet data hardware address
  37  * Returns Packet buffer pointer
  38  */
  39 static inline void *cvm_oct_get_buffer_ptr(union cvmx_buf_ptr packet_ptr)
  40 {
  41         return cvmx_phys_to_ptr(((packet_ptr.s.addr >> 7) - packet_ptr.s.back)
  42                                 << 7);
  43 }
  44
  45 /**
  46  * Given an IPD/PKO port number, return the logical interface it is
  47  * on.
  48  *
  49  * @ipd_port: Port to check
  50  *
  51  * Returns Logical interface
  52  */
  53 static inline int INTERFACE(int ipd_port)
  54 {
  55         if (ipd_port < 32)      /* Interface 0 or 1 for RGMII,GMII,SPI, etc */
  56                 return ipd_port >> 4;
  57         else if (ipd_port < 36) /* Interface 2 for NPI */
  58                 return 2;
  59         else if (ipd_port < 40) /* Interface 3 for loopback */
  60                 return 3;
  61         else if (ipd_port == 40)        /* Non existant interface for POW0 */
  62                 return 4;
  63         else
  64                 panic("Illegal ipd_port %d passed to INTERFACE\n", ipd_port);
  65 }
  66
  67 /**
  68  * Given an IPD/PKO port number, return the port's index on a
  69  * logical interface.
  70  *
  71  * @ipd_port: Port to check
  72  *
  73  * Returns Index into interface port list
  74  */
  75 static inline int INDEX(int ipd_port)
  76 {
  77         if (ipd_port < 32)
  78                 return ipd_port & 15;
  79         else
  80                 return ipd_port & 3;
  81 }