src/dev/hsa/hsa_signal.hh

/*
 * Copyright (c) 2016-2019 Advanced Micro Devices, Inc.
 * All rights reserved.
 *
 * For use for simulation and test purposes only
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * 2. 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.
 *
 * 3. Neither the name of the copyright holder 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 HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (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 DEV_HSA_HSA_SIGNAL_H
#define DEV_HSA_HSA_SIGNAL_H

// AMD Signal Kind Enumeration Values.
typedef int64_t amd_signal_kind64_t;
enum amd_signal_kind_t {
  AMD_SIGNAL_KIND_INVALID = 0,
  AMD_SIGNAL_KIND_USER = 1,
  AMD_SIGNAL_KIND_DOORBELL = -1,
  AMD_SIGNAL_KIND_LEGACY_DOORBELL = -2
};

// AMD Signal.
typedef struct amd_signal_s {
  amd_signal_kind64_t kind;
  union {
    volatile int64_t value;
    volatile uint32_t* legacy_hardware_doorbell_ptr;
    volatile uint64_t* hardware_doorbell_ptr;
  };
  uint64_t event_mailbox_ptr;
  uint32_t event_id;
  uint32_t reserved1;
  uint64_t start_ts;
  uint64_t end_ts;
  union {
    uint64_t queue_ptr;
    uint64_t reserved2;
  };
  uint32_t reserved3[2];
} amd_signal_t;

#endif // DEV_HSA_HSA_SIGNAL_H