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octeon-feature.h

/***********************license start***************
 * Author: Cavium Networks
 *
 * Contact: support@caviumnetworks.com
 * This file is part of the OCTEON SDK
 *
 * Copyright (c) 2003-2008 Cavium Networks
 *
 * This file is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, Version 2, as
 * published by the Free Software Foundation.
 *
 * This file is distributed in the hope that it will be useful, but
 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
 * NONINFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this file; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 * or visit http://www.gnu.org/licenses/.
 *
 * This file may also be available under a different license from Cavium.
 * Contact Cavium Networks for more information
 ***********************license end**************************************/

/*
 * File defining checks for different Octeon features.
 */

#ifndef __OCTEON_FEATURE_H__
#define __OCTEON_FEATURE_H__

enum octeon_feature {
      /*
       * Octeon models in the CN5XXX family and higher support
       * atomic add instructions to memory (saa/saad).
       */
      OCTEON_FEATURE_SAAD,
      /* Does this Octeon support the ZIP offload engine? */
      OCTEON_FEATURE_ZIP,
      /* Does this Octeon support crypto acceleration using COP2? */
      OCTEON_FEATURE_CRYPTO,
      /* Does this Octeon support PCI express? */
      OCTEON_FEATURE_PCIE,
      /* Some Octeon models support internal memory for storing
       * cryptographic keys */
      OCTEON_FEATURE_KEY_MEMORY,
      /* Octeon has a LED controller for banks of external LEDs */
      OCTEON_FEATURE_LED_CONTROLLER,
      /* Octeon has a trace buffer */
      OCTEON_FEATURE_TRA,
      /* Octeon has a management port */
      OCTEON_FEATURE_MGMT_PORT,
      /* Octeon has a raid unit */
      OCTEON_FEATURE_RAID,
      /* Octeon has a builtin USB */
      OCTEON_FEATURE_USB,
      /* Octeon IPD can run without using work queue entries */
      OCTEON_FEATURE_NO_WPTR,
      /* Octeon has DFA state machines */
      OCTEON_FEATURE_DFA,
      /* Octeon MDIO block supports clause 45 transactions for 10
       * Gig support */
      OCTEON_FEATURE_MDIO_CLAUSE_45,
};

static inline int cvmx_fuse_read(int fuse);

/**
 * Determine if the current Octeon supports a specific feature. These
 * checks have been optimized to be fairly quick, but they should still
 * be kept out of fast path code.
 *
 * @feature: Feature to check for. This should always be a constant so the
 *                compiler can remove the switch statement through optimization.
 *
 * Returns Non zero if the feature exists. Zero if the feature does not
 *         exist.
 */
static inline int octeon_has_feature(enum octeon_feature feature)
{
      switch (feature) {
      case OCTEON_FEATURE_SAAD:
            return !OCTEON_IS_MODEL(OCTEON_CN3XXX);

      case OCTEON_FEATURE_ZIP:
            if (OCTEON_IS_MODEL(OCTEON_CN30XX)
                || OCTEON_IS_MODEL(OCTEON_CN50XX)
                || OCTEON_IS_MODEL(OCTEON_CN52XX))
                  return 0;
            else if (OCTEON_IS_MODEL(OCTEON_CN38XX_PASS1))
                  return 1;
            else
                  return !cvmx_fuse_read(121);

      case OCTEON_FEATURE_CRYPTO:
            return !cvmx_fuse_read(90);

      case OCTEON_FEATURE_PCIE:
            return OCTEON_IS_MODEL(OCTEON_CN56XX)
                  || OCTEON_IS_MODEL(OCTEON_CN52XX);

      case OCTEON_FEATURE_KEY_MEMORY:
      case OCTEON_FEATURE_LED_CONTROLLER:
            return OCTEON_IS_MODEL(OCTEON_CN38XX)
                  || OCTEON_IS_MODEL(OCTEON_CN58XX)
                  || OCTEON_IS_MODEL(OCTEON_CN56XX);
      case OCTEON_FEATURE_TRA:
            return !(OCTEON_IS_MODEL(OCTEON_CN30XX)
                   || OCTEON_IS_MODEL(OCTEON_CN50XX));
      case OCTEON_FEATURE_MGMT_PORT:
            return OCTEON_IS_MODEL(OCTEON_CN56XX)
                  || OCTEON_IS_MODEL(OCTEON_CN52XX);
      case OCTEON_FEATURE_RAID:
            return OCTEON_IS_MODEL(OCTEON_CN56XX)
                  || OCTEON_IS_MODEL(OCTEON_CN52XX);
      case OCTEON_FEATURE_USB:
            return !(OCTEON_IS_MODEL(OCTEON_CN38XX)
                   || OCTEON_IS_MODEL(OCTEON_CN58XX));
      case OCTEON_FEATURE_NO_WPTR:
            return (OCTEON_IS_MODEL(OCTEON_CN56XX)
                   || OCTEON_IS_MODEL(OCTEON_CN52XX))
                  && !OCTEON_IS_MODEL(OCTEON_CN56XX_PASS1_X)
                  && !OCTEON_IS_MODEL(OCTEON_CN52XX_PASS1_X);
      case OCTEON_FEATURE_DFA:
            if (!OCTEON_IS_MODEL(OCTEON_CN38XX)
                && !OCTEON_IS_MODEL(OCTEON_CN31XX)
                && !OCTEON_IS_MODEL(OCTEON_CN58XX))
                  return 0;
            else if (OCTEON_IS_MODEL(OCTEON_CN3020))
                  return 0;
            else if (OCTEON_IS_MODEL(OCTEON_CN38XX_PASS1))
                  return 1;
            else
                  return !cvmx_fuse_read(120);
      case OCTEON_FEATURE_MDIO_CLAUSE_45:
            return !(OCTEON_IS_MODEL(OCTEON_CN3XXX)
                   || OCTEON_IS_MODEL(OCTEON_CN58XX)
                   || OCTEON_IS_MODEL(OCTEON_CN50XX));
      }
      return 0;
}

#endif /* __OCTEON_FEATURE_H__ */

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