release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/staging/octeon/ethernet-defines.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  * A few defines are used to control the operation of this driver:
  30  *  CONFIG_CAVIUM_RESERVE32
  31  *      This kernel config options controls the amount of memory configured
  32  *      in a wired TLB entry for all processes to share. If this is set, the
  33  *      driver will use this memory instead of kernel memory for pools. This
  34  *      allows 32bit userspace application to access the buffers, but also
  35  *      requires all received packets to be copied.
  36  *  CONFIG_CAVIUM_OCTEON_NUM_PACKET_BUFFERS
  37  *      This kernel config option allows the user to control the number of
  38  *      packet and work queue buffers allocated by the driver. If this is zero,
  39  *      the driver uses the default from below.
  40  *  USE_SKBUFFS_IN_HW
  41  *      Tells the driver to populate the packet buffers with kernel skbuffs.
  42  *      This allows the driver to receive packets without copying them. It also
  43  *      means that 32bit userspace can't access the packet buffers.
  44  *  USE_HW_TCPUDP_CHECKSUM
  45  *      Controls if the Octeon TCP/UDP checksum engine is used for packet
  46  *      output. If this is zero, the kernel will perform the checksum in
  47  *      software.
  48  *  USE_ASYNC_IOBDMA
  49  *      Use asynchronous IO access to hardware. This uses Octeon's asynchronous
  50  *      IOBDMAs to issue IO accesses without stalling. Set this to zero
  51  *      to disable this. Note that IOBDMAs require CVMSEG.
  52  *  REUSE_SKBUFFS_WITHOUT_FREE
  53  *      Allows the TX path to free an skbuff into the FPA hardware pool. This
  54  *      can significantly improve performance for forwarding and bridging, but
  55  *      may be somewhat dangerous. Checks are made, but if any buffer is reused
  56  *      without the proper Linux cleanup, the networking stack may have very
  57  *      bizarre bugs.
  58  */
  59 #ifndef __ETHERNET_DEFINES_H__
  60 #define __ETHERNET_DEFINES_H__
  61
  62 #include "cvmx-config.h"
  63
  64
  65 #define OCTEON_ETHERNET_VERSION "1.9"
  66
  67 #ifndef CONFIG_CAVIUM_RESERVE32
  68 #define CONFIG_CAVIUM_RESERVE32 0
  69 #endif
  70
  71 #define USE_SKBUFFS_IN_HW           1
  72 #ifdef CONFIG_NETFILTER
  73 #define REUSE_SKBUFFS_WITHOUT_FREE  0
  74 #else
  75 #define REUSE_SKBUFFS_WITHOUT_FREE  1
  76 #endif
  77
  78 #define USE_HW_TCPUDP_CHECKSUM      1
  79
  80 /* Enable Random Early Dropping under load */
  81 #define USE_RED                     1
  82 #define USE_ASYNC_IOBDMA            (CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE > 0)
  83
  84 #define USE_10MBPS_PREAMBLE_WORKAROUND 1
  85 /*
  86  * Use this to have all FPA frees also tell the L2 not to write data
  87  * to memory.
  88  */
  89 #define DONT_WRITEBACK(x)           (x)
  90 /* Use this to not have FPA frees control L2 */
  91 /*#define DONT_WRITEBACK(x)         0   */
  92
  93 /* Maximum number of SKBs to try to free per xmit packet. */
  94 #define MAX_OUT_QUEUE_DEPTH 1000
  95
  96 #define FAU_TOTAL_TX_TO_CLEAN (CVMX_FAU_REG_END - sizeof(uint32_t))
  97 #define FAU_NUM_PACKET_BUFFERS_TO_FREE (FAU_TOTAL_TX_TO_CLEAN - sizeof(uint32_t))
  98
  99 #define TOTAL_NUMBER_OF_PORTS       (CVMX_PIP_NUM_INPUT_PORTS+1)
 100
 101
 102 #endif /* __ETHERNET_DEFINES_H__ */