1219820Sjeff/* 2219820Sjeff * Copyright (c) 2007 Cisco, Inc. All rights reserved. 3219820Sjeff * 4219820Sjeff * This software is available to you under a choice of one of two 5219820Sjeff * licenses. You may choose to be licensed under the terms of the GNU 6219820Sjeff * General Public License (GPL) Version 2, available from the file 7219820Sjeff * COPYING in the main directory of this source tree, or the 8219820Sjeff * OpenIB.org BSD license below: 9219820Sjeff * 10219820Sjeff * Redistribution and use in source and binary forms, with or 11219820Sjeff * without modification, are permitted provided that the following 12219820Sjeff * conditions are met: 13219820Sjeff * 14219820Sjeff * - Redistributions of source code must retain the above 15219820Sjeff * copyright notice, this list of conditions and the following 16219820Sjeff * disclaimer. 17219820Sjeff * 18219820Sjeff * - Redistributions in binary form must reproduce the above 19219820Sjeff * copyright notice, this list of conditions and the following 20219820Sjeff * disclaimer in the documentation and/or other materials 21219820Sjeff * provided with the distribution. 22219820Sjeff * 23219820Sjeff * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24219820Sjeff * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25219820Sjeff * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26219820Sjeff * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27219820Sjeff * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28219820Sjeff * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29219820Sjeff * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30219820Sjeff * SOFTWARE. 31219820Sjeff */ 32219820Sjeff 33219820Sjeff#ifndef DOORBELL_H 34219820Sjeff#define DOORBELL_H 35219820Sjeff 36219820Sjeff#ifdef __LP64__ 37219820Sjeff#if __BYTE_ORDER == __LITTLE_ENDIAN 38219820Sjeff# define MLX4_PAIR_TO_64(val) ((uint64_t) val[1] << 32 | val[0]) 39219820Sjeff#elif __BYTE_ORDER == __BIG_ENDIAN 40219820Sjeff# define MLX4_PAIR_TO_64(val) ((uint64_t) val[0] << 32 | val[1]) 41219820Sjeff#else 42219820Sjeff# error __BYTE_ORDER not defined 43219820Sjeff#endif 44219820Sjeff 45219820Sjeffstatic inline void mlx4_write64(uint32_t val[2], struct mlx4_context *ctx, int offset) 46219820Sjeff{ 47219820Sjeff *(volatile uint64_t *) (ctx->uar + offset) = MLX4_PAIR_TO_64(val); 48219820Sjeff} 49219820Sjeff 50219820Sjeff#else 51219820Sjeff 52219820Sjeffstatic inline void mlx4_write64(uint32_t val[2], struct mlx4_context *ctx, int offset) 53219820Sjeff{ 54219820Sjeff pthread_spin_lock(&ctx->uar_lock); 55219820Sjeff *(volatile uint32_t *) (ctx->uar + offset) = val[0]; 56219820Sjeff *(volatile uint32_t *) (ctx->uar + offset + 4) = val[1]; 57219820Sjeff pthread_spin_unlock(&ctx->uar_lock); 58219820Sjeff} 59219820Sjeff 60219820Sjeff#endif 61219820Sjeff 62219820Sjeff#endif /* DOORBELL_H */ 63