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Diffstat (limited to 'arch/mips/include/asm/octeon/octeon-feature.h')
| -rw-r--r-- | arch/mips/include/asm/octeon/octeon-feature.h | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/arch/mips/include/asm/octeon/octeon-feature.h b/arch/mips/include/asm/octeon/octeon-feature.h new file mode 100644 index 0000000..04fac68 --- /dev/null +++ b/arch/mips/include/asm/octeon/octeon-feature.h @@ -0,0 +1,119 @@ +/***********************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, +}; + +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)); + } + return 0; +} + +#endif /* __OCTEON_FEATURE_H__ */ |