1 /*
2  * Copyright (c) 2013-2015, Mellanox Technologies. 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 #include <linux/kernel.h>
34 #include <linux/mlx5/driver.h>
35 #include <linux/mlx5/qp.h>
36 #include "mlx5_core.h"
37 
mlx5_core_create_mkey(struct mlx5_core_dev * dev,u32 * mkey,u32 * in,int inlen)38 int mlx5_core_create_mkey(struct mlx5_core_dev *dev, u32 *mkey, u32 *in,
39 			  int inlen)
40 {
41 	u32 lout[MLX5_ST_SZ_DW(create_mkey_out)] = {};
42 	u32 mkey_index;
43 	int err;
44 
45 	MLX5_SET(create_mkey_in, in, opcode, MLX5_CMD_OP_CREATE_MKEY);
46 
47 	err = mlx5_cmd_exec(dev, in, inlen, lout, sizeof(lout));
48 	if (err)
49 		return err;
50 
51 	mkey_index = MLX5_GET(create_mkey_out, lout, mkey_index);
52 	*mkey = MLX5_GET(create_mkey_in, in, memory_key_mkey_entry.mkey_7_0) |
53 		mlx5_idx_to_mkey(mkey_index);
54 
55 	mlx5_core_dbg(dev, "out 0x%x, mkey 0x%x\n", mkey_index, *mkey);
56 	return 0;
57 }
58 EXPORT_SYMBOL(mlx5_core_create_mkey);
59 
mlx5_core_destroy_mkey(struct mlx5_core_dev * dev,u32 mkey)60 int mlx5_core_destroy_mkey(struct mlx5_core_dev *dev, u32 mkey)
61 {
62 	u32 in[MLX5_ST_SZ_DW(destroy_mkey_in)] = {};
63 
64 	MLX5_SET(destroy_mkey_in, in, opcode, MLX5_CMD_OP_DESTROY_MKEY);
65 	MLX5_SET(destroy_mkey_in, in, mkey_index, mlx5_mkey_to_idx(mkey));
66 	return mlx5_cmd_exec_in(dev, destroy_mkey, in);
67 }
68 EXPORT_SYMBOL(mlx5_core_destroy_mkey);
69 
mlx5_core_query_mkey(struct mlx5_core_dev * dev,u32 mkey,u32 * out,int outlen)70 int mlx5_core_query_mkey(struct mlx5_core_dev *dev, u32 mkey, u32 *out,
71 			 int outlen)
72 {
73 	u32 in[MLX5_ST_SZ_DW(query_mkey_in)] = {};
74 
75 	memset(out, 0, outlen);
76 	MLX5_SET(query_mkey_in, in, opcode, MLX5_CMD_OP_QUERY_MKEY);
77 	MLX5_SET(query_mkey_in, in, mkey_index, mlx5_mkey_to_idx(mkey));
78 	return mlx5_cmd_exec(dev, in, sizeof(in), out, outlen);
79 }
80 EXPORT_SYMBOL(mlx5_core_query_mkey);
81 
mlx5_get_psv(u32 * out,int psv_index)82 static inline u32 mlx5_get_psv(u32 *out, int psv_index)
83 {
84 	switch (psv_index) {
85 	case 1: return MLX5_GET(create_psv_out, out, psv1_index);
86 	case 2: return MLX5_GET(create_psv_out, out, psv2_index);
87 	case 3: return MLX5_GET(create_psv_out, out, psv3_index);
88 	default: return MLX5_GET(create_psv_out, out, psv0_index);
89 	}
90 }
91 
mlx5_core_create_psv(struct mlx5_core_dev * dev,u32 pdn,int npsvs,u32 * sig_index)92 int mlx5_core_create_psv(struct mlx5_core_dev *dev, u32 pdn,
93 			 int npsvs, u32 *sig_index)
94 {
95 	u32 out[MLX5_ST_SZ_DW(create_psv_out)] = {};
96 	u32 in[MLX5_ST_SZ_DW(create_psv_in)] = {};
97 	int i, err;
98 
99 	if (npsvs > MLX5_MAX_PSVS)
100 		return -EINVAL;
101 
102 	MLX5_SET(create_psv_in, in, opcode, MLX5_CMD_OP_CREATE_PSV);
103 	MLX5_SET(create_psv_in, in, pd, pdn);
104 	MLX5_SET(create_psv_in, in, num_psv, npsvs);
105 
106 	err = mlx5_cmd_exec_inout(dev, create_psv, in, out);
107 	if (err)
108 		return err;
109 
110 	for (i = 0; i < npsvs; i++)
111 		sig_index[i] = mlx5_get_psv(out, i);
112 
113 	return err;
114 }
115 EXPORT_SYMBOL(mlx5_core_create_psv);
116 
mlx5_core_destroy_psv(struct mlx5_core_dev * dev,int psv_num)117 int mlx5_core_destroy_psv(struct mlx5_core_dev *dev, int psv_num)
118 {
119 	u32 in[MLX5_ST_SZ_DW(destroy_psv_in)] = {};
120 
121 	MLX5_SET(destroy_psv_in, in, opcode, MLX5_CMD_OP_DESTROY_PSV);
122 	MLX5_SET(destroy_psv_in, in, psvn, psv_num);
123 	return mlx5_cmd_exec_in(dev, destroy_psv, in);
124 }
125 EXPORT_SYMBOL(mlx5_core_destroy_psv);
126 
mlx5_core_get_terminate_scatter_list_mkey(struct mlx5_core_dev * dev)127 __be32 mlx5_core_get_terminate_scatter_list_mkey(struct mlx5_core_dev *dev)
128 {
129 	u32 out[MLX5_ST_SZ_DW(query_special_contexts_out)] = {};
130 	u32 in[MLX5_ST_SZ_DW(query_special_contexts_in)] = {};
131 	u32 mkey;
132 
133 	if (!MLX5_CAP_GEN(dev, terminate_scatter_list_mkey))
134 		return MLX5_TERMINATE_SCATTER_LIST_LKEY;
135 
136 	MLX5_SET(query_special_contexts_in, in, opcode,
137 		 MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS);
138 	if (mlx5_cmd_exec_inout(dev, query_special_contexts, in, out))
139 		return MLX5_TERMINATE_SCATTER_LIST_LKEY;
140 
141 	mkey = MLX5_GET(query_special_contexts_out, out,
142 			terminate_scatter_list_mkey);
143 	return cpu_to_be32(mkey);
144 }
145 EXPORT_SYMBOL(mlx5_core_get_terminate_scatter_list_mkey);
146