rte_io.h

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/*
 *   BSD LICENSE
 *
 *   Copyright(c) 2016 Cavium, Inc. All rights reserved.
 *   All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *     * Neither the name of Cavium, Inc nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _RTE_IO_H_
#define _RTE_IO_H_

#include <stdint.h>
#include <rte_common.h>
#include <rte_atomic.h>

#ifdef __DOXYGEN__

static inline uint8_t
rte_read8_relaxed(const volatile void *addr);

static inline uint16_t
rte_read16_relaxed(const volatile void *addr);

static inline uint32_t
rte_read32_relaxed(const volatile void *addr);

static inline uint64_t
rte_read64_relaxed(const volatile void *addr);

static inline void
rte_write8_relaxed(uint8_t value, volatile void *addr);

static inline void
rte_write16_relaxed(uint16_t value, volatile void *addr);

static inline void
rte_write32_relaxed(uint32_t value, volatile void *addr);

static inline void
rte_write64_relaxed(uint64_t value, volatile void *addr);

static inline uint8_t
rte_read8(const volatile void *addr);

static inline uint16_t
rte_read16(const volatile void *addr);

static inline uint32_t
rte_read32(const volatile void *addr);

static inline uint64_t
rte_read64(const volatile void *addr);

static inline void
rte_write8(uint8_t value, volatile void *addr);

static inline void
rte_write16(uint16_t value, volatile void *addr);

static inline void
rte_write32(uint32_t value, volatile void *addr);

static inline void
rte_write64(uint64_t value, volatile void *addr);

#endif /* __DOXYGEN__ */

#ifndef RTE_OVERRIDE_IO_H

static __rte_always_inline uint8_t
rte_read8_relaxed(const volatile void *addr)
{
        return *(const volatile uint8_t *)addr;
}

static __rte_always_inline uint16_t
rte_read16_relaxed(const volatile void *addr)
{
        return *(const volatile uint16_t *)addr;
}

static __rte_always_inline uint32_t
rte_read32_relaxed(const volatile void *addr)
{
        return *(const volatile uint32_t *)addr;
}

static __rte_always_inline uint64_t
rte_read64_relaxed(const volatile void *addr)
{
        return *(const volatile uint64_t *)addr;
}

static __rte_always_inline void
rte_write8_relaxed(uint8_t value, volatile void *addr)
{
        *(volatile uint8_t *)addr = value;
}

static __rte_always_inline void
rte_write16_relaxed(uint16_t value, volatile void *addr)
{
        *(volatile uint16_t *)addr = value;
}

static __rte_always_inline void
rte_write32_relaxed(uint32_t value, volatile void *addr)
{
        *(volatile uint32_t *)addr = value;
}

static __rte_always_inline void
rte_write64_relaxed(uint64_t value, volatile void *addr)
{
        *(volatile uint64_t *)addr = value;
}

static __rte_always_inline uint8_t
rte_read8(const volatile void *addr)
{
        uint8_t val;
        val = rte_read8_relaxed(addr);
        rte_io_rmb();
        return val;
}

static __rte_always_inline uint16_t
rte_read16(const volatile void *addr)
{
        uint16_t val;
        val = rte_read16_relaxed(addr);
        rte_io_rmb();
        return val;
}

static __rte_always_inline uint32_t
rte_read32(const volatile void *addr)
{
        uint32_t val;
        val = rte_read32_relaxed(addr);
        rte_io_rmb();
        return val;
}

static __rte_always_inline uint64_t
rte_read64(const volatile void *addr)
{
        uint64_t val;
        val = rte_read64_relaxed(addr);
        rte_io_rmb();
        return val;
}

static __rte_always_inline void
rte_write8(uint8_t value, volatile void *addr)
{
        rte_io_wmb();
        rte_write8_relaxed(value, addr);
}

static __rte_always_inline void
rte_write16(uint16_t value, volatile void *addr)
{
        rte_io_wmb();
        rte_write16_relaxed(value, addr);
}

static __rte_always_inline void
rte_write32(uint32_t value, volatile void *addr)
{
        rte_io_wmb();
        rte_write32_relaxed(value, addr);
}

static __rte_always_inline void
rte_write64(uint64_t value, volatile void *addr)
{
        rte_io_wmb();
        rte_write64_relaxed(value, addr);
}

#endif /* RTE_OVERRIDE_IO_H */

#endif /* _RTE_IO_H_ */