release/src-rt-6.x.4708/linux/linux-2.6.36/arch/mips/include/asm/octeon/octeon-feature.h

   1 /***********************license start***************
   2  * Author: Cavium Networks
   3  *
   4  * Contact: support@caviumnetworks.com
   5  * This file is part of the OCTEON SDK
   6  *
   7  * Copyright (c) 2003-2008 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  ***********************license end**************************************/
  27
  28 /*
  29  * File defining checks for different Octeon features.
  30  */
  31
  32 #ifndef __OCTEON_FEATURE_H__
  33 #define __OCTEON_FEATURE_H__
  34
  35 enum octeon_feature {
  36         /*
  37          * Octeon models in the CN5XXX family and higher support
  38          * atomic add instructions to memory (saa/saad).
  39          */
  40         OCTEON_FEATURE_SAAD,
  41         /* Does this Octeon support the ZIP offload engine? */
  42         OCTEON_FEATURE_ZIP,
  43         /* Does this Octeon support crypto acceleration using COP2? */
  44         OCTEON_FEATURE_CRYPTO,
  45         /* Does this Octeon support PCI express? */
  46         OCTEON_FEATURE_PCIE,
  47         /* Some Octeon models support internal memory for storing
  48          * cryptographic keys */
  49         OCTEON_FEATURE_KEY_MEMORY,
  50         /* Octeon has a LED controller for banks of external LEDs */
  51         OCTEON_FEATURE_LED_CONTROLLER,
  52         /* Octeon has a trace buffer */
  53         OCTEON_FEATURE_TRA,
  54         /* Octeon has a management port */
  55         OCTEON_FEATURE_MGMT_PORT,
  56         /* Octeon has a raid unit */
  57         OCTEON_FEATURE_RAID,
  58         /* Octeon has a builtin USB */
  59         OCTEON_FEATURE_USB,
  60         /* Octeon IPD can run without using work queue entries */
  61         OCTEON_FEATURE_NO_WPTR,
  62         /* Octeon has DFA state machines */
  63         OCTEON_FEATURE_DFA,
  64         /* Octeon MDIO block supports clause 45 transactions for 10
  65          * Gig support */
  66         OCTEON_FEATURE_MDIO_CLAUSE_45,
  67 };
  68
  69 static inline int cvmx_fuse_read(int fuse);
  70
  71 /**
  72  * Determine if the current Octeon supports a specific feature. These
  73  * checks have been optimized to be fairly quick, but they should still
  74  * be kept out of fast path code.
  75  *
  76  * @feature: Feature to check for. This should always be a constant so the
  77  *                compiler can remove the switch statement through optimization.
  78  *
  79  * Returns Non zero if the feature exists. Zero if the feature does not
  80  *         exist.
  81  */
  82 static inline int octeon_has_feature(enum octeon_feature feature)
  83 {
  84         switch (feature) {
  85         case OCTEON_FEATURE_SAAD:
  86                 return !OCTEON_IS_MODEL(OCTEON_CN3XXX);
  87
  88         case OCTEON_FEATURE_ZIP:
  89                 if (OCTEON_IS_MODEL(OCTEON_CN30XX)
  90                     || OCTEON_IS_MODEL(OCTEON_CN50XX)
  91                     || OCTEON_IS_MODEL(OCTEON_CN52XX))
  92                         return 0;
  93                 else if (OCTEON_IS_MODEL(OCTEON_CN38XX_PASS1))
  94                         return 1;
  95                 else
  96                         return !cvmx_fuse_read(121);
  97
  98         case OCTEON_FEATURE_CRYPTO:
  99                 return !cvmx_fuse_read(90);
 100
 101         case OCTEON_FEATURE_PCIE:
 102         case OCTEON_FEATURE_MGMT_PORT:
 103         case OCTEON_FEATURE_RAID:
 104                 return OCTEON_IS_MODEL(OCTEON_CN56XX)
 105                         || OCTEON_IS_MODEL(OCTEON_CN52XX);
 106
 107         case OCTEON_FEATURE_KEY_MEMORY:
 108         case OCTEON_FEATURE_LED_CONTROLLER:
 109                 return OCTEON_IS_MODEL(OCTEON_CN38XX)
 110                         || OCTEON_IS_MODEL(OCTEON_CN58XX)
 111                         || OCTEON_IS_MODEL(OCTEON_CN56XX);
 112         case OCTEON_FEATURE_TRA:
 113                 return !(OCTEON_IS_MODEL(OCTEON_CN30XX)
 114                          || OCTEON_IS_MODEL(OCTEON_CN50XX));
 115         case OCTEON_FEATURE_USB:
 116                 return !(OCTEON_IS_MODEL(OCTEON_CN38XX)
 117                          || OCTEON_IS_MODEL(OCTEON_CN58XX));
 118         case OCTEON_FEATURE_NO_WPTR:
 119                 return (OCTEON_IS_MODEL(OCTEON_CN56XX)
 120                          || OCTEON_IS_MODEL(OCTEON_CN52XX))
 121                         && !OCTEON_IS_MODEL(OCTEON_CN56XX_PASS1_X)
 122                         && !OCTEON_IS_MODEL(OCTEON_CN52XX_PASS1_X);
 123         case OCTEON_FEATURE_DFA:
 124                 if (!OCTEON_IS_MODEL(OCTEON_CN38XX)
 125                     && !OCTEON_IS_MODEL(OCTEON_CN31XX)
 126                     && !OCTEON_IS_MODEL(OCTEON_CN58XX))
 127                         return 0;
 128                 else if (OCTEON_IS_MODEL(OCTEON_CN3020))
 129                         return 0;
 130                 else if (OCTEON_IS_MODEL(OCTEON_CN38XX_PASS1))
 131                         return 1;
 132                 else
 133                         return !cvmx_fuse_read(120);
 134         case OCTEON_FEATURE_MDIO_CLAUSE_45:
 135                 return !(OCTEON_IS_MODEL(OCTEON_CN3XXX)
 136                          || OCTEON_IS_MODEL(OCTEON_CN58XX)
 137                          || OCTEON_IS_MODEL(OCTEON_CN50XX));
 138         }
 139         return 0;
 140 }
 141
 142 #endif /* __OCTEON_FEATURE_H__ */