1 /* 2 * Copyright (c) 2007 Cisco, Inc. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 */ 32 33 #ifndef DOORBELL_H 34 #define DOORBELL_H 35 36 #include <stdint.h> 37 #include <pthread.h> 38 #include "mlx4.h" 39 #include "mmio.h" 40 41 struct mlx4_context; 42 43 #if SIZEOF_LONG == 8 44 45 #if __BYTE_ORDER == __LITTLE_ENDIAN 46 # define MLX4_PAIR_TO_64(val) ((uint64_t) val[1] << 32 | val[0]) 47 #elif __BYTE_ORDER == __BIG_ENDIAN 48 # define MLX4_PAIR_TO_64(val) ((uint64_t) val[0] << 32 | val[1]) 49 #else 50 # error __BYTE_ORDER not defined 51 #endif 52 53 static inline void mlx4_write64(uint32_t val[2], struct mlx4_context *ctx, int offset) 54 { 55 mmio_writeq((unsigned long)(ctx->uar + offset), MLX4_PAIR_TO_64(val)); 56 } 57 58 #else 59 60 static inline void mlx4_write64(uint32_t val[2], struct mlx4_context *ctx, int offset) 61 { 62 pthread_spin_lock(&ctx->uar_lock); 63 mmio_writel((unsigned long)(ctx->uar + offset), val[0]); 64 mmio_writel((unsigned long)(ctx->uar + offset + 4), val[1]); 65 pthread_spin_unlock(&ctx->uar_lock); 66 } 67 68 #endif 69 70 #endif /* DOORBELL_H */ 71