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
mlx4_write64(uint32_t val[2],struct mlx4_context * ctx,int offset)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
mlx4_write64(uint32_t val[2],struct mlx4_context * ctx,int offset)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