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/module.h> 35 #include <linux/mlx5/driver.h> 36 #include <linux/mlx5/cmd.h> 37 #include "mlx5_core.h" 38 39 void mlx5_init_mkey_table(struct mlx5_core_dev *dev) 40 { 41 struct mlx5_mkey_table *table = &dev->priv.mkey_table; 42 43 memset(table, 0, sizeof(*table)); 44 rwlock_init(&table->lock); 45 INIT_RADIX_TREE(&table->tree, GFP_ATOMIC); 46 } 47 48 void mlx5_cleanup_mkey_table(struct mlx5_core_dev *dev) 49 { 50 } 51 52 int mlx5_core_create_mkey_cb(struct mlx5_core_dev *dev, 53 struct mlx5_core_mkey *mkey, 54 u32 *in, int inlen, 55 u32 *out, int outlen, 56 mlx5_cmd_cbk_t callback, void *context) 57 { 58 struct mlx5_mkey_table *table = &dev->priv.mkey_table; 59 u32 lout[MLX5_ST_SZ_DW(create_mkey_out)] = {0}; 60 u32 mkey_index; 61 void *mkc; 62 int err; 63 u8 key; 64 65 spin_lock_irq(&dev->priv.mkey_lock); 66 key = dev->priv.mkey_key++; 67 spin_unlock_irq(&dev->priv.mkey_lock); 68 mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry); 69 70 MLX5_SET(create_mkey_in, in, opcode, MLX5_CMD_OP_CREATE_MKEY); 71 MLX5_SET(mkc, mkc, mkey_7_0, key); 72 73 if (callback) 74 return mlx5_cmd_exec_cb(dev, in, inlen, out, outlen, 75 callback, context); 76 77 err = mlx5_cmd_exec(dev, in, inlen, lout, sizeof(lout)); 78 if (err) 79 return err; 80 81 mkey_index = MLX5_GET(create_mkey_out, lout, mkey_index); 82 mkey->iova = MLX5_GET64(mkc, mkc, start_addr); 83 mkey->size = MLX5_GET64(mkc, mkc, len); 84 mkey->key = mlx5_idx_to_mkey(mkey_index) | key; 85 mkey->pd = MLX5_GET(mkc, mkc, pd); 86 87 mlx5_core_dbg(dev, "out 0x%x, key 0x%x, mkey 0x%x\n", 88 mkey_index, key, mkey->key); 89 90 /* connect to mkey tree */ 91 write_lock_irq(&table->lock); 92 err = radix_tree_insert(&table->tree, mlx5_base_mkey(mkey->key), mkey); 93 write_unlock_irq(&table->lock); 94 if (err) { 95 mlx5_core_warn(dev, "failed radix tree insert of mkey 0x%x, %d\n", 96 mlx5_base_mkey(mkey->key), err); 97 mlx5_core_destroy_mkey(dev, mkey); 98 } 99 100 return err; 101 } 102 EXPORT_SYMBOL(mlx5_core_create_mkey_cb); 103 104 int mlx5_core_create_mkey(struct mlx5_core_dev *dev, 105 struct mlx5_core_mkey *mkey, 106 u32 *in, int inlen) 107 { 108 return mlx5_core_create_mkey_cb(dev, mkey, in, inlen, 109 NULL, 0, NULL, NULL); 110 } 111 EXPORT_SYMBOL(mlx5_core_create_mkey); 112 113 int mlx5_core_destroy_mkey(struct mlx5_core_dev *dev, 114 struct mlx5_core_mkey *mkey) 115 { 116 struct mlx5_mkey_table *table = &dev->priv.mkey_table; 117 u32 out[MLX5_ST_SZ_DW(destroy_mkey_out)] = {0}; 118 u32 in[MLX5_ST_SZ_DW(destroy_mkey_in)] = {0}; 119 struct mlx5_core_mkey *deleted_mkey; 120 unsigned long flags; 121 122 write_lock_irqsave(&table->lock, flags); 123 deleted_mkey = radix_tree_delete(&table->tree, mlx5_base_mkey(mkey->key)); 124 write_unlock_irqrestore(&table->lock, flags); 125 if (!deleted_mkey) { 126 mlx5_core_dbg(dev, "failed radix tree delete of mkey 0x%x\n", 127 mlx5_base_mkey(mkey->key)); 128 return -ENOENT; 129 } 130 131 MLX5_SET(destroy_mkey_in, in, opcode, MLX5_CMD_OP_DESTROY_MKEY); 132 MLX5_SET(destroy_mkey_in, in, mkey_index, mlx5_mkey_to_idx(mkey->key)); 133 return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out)); 134 } 135 EXPORT_SYMBOL(mlx5_core_destroy_mkey); 136 137 int mlx5_core_query_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mkey *mkey, 138 u32 *out, int outlen) 139 { 140 u32 in[MLX5_ST_SZ_DW(query_mkey_in)] = {0}; 141 142 memset(out, 0, outlen); 143 MLX5_SET(query_mkey_in, in, opcode, MLX5_CMD_OP_QUERY_MKEY); 144 MLX5_SET(query_mkey_in, in, mkey_index, mlx5_mkey_to_idx(mkey->key)); 145 return mlx5_cmd_exec(dev, in, sizeof(in), out, outlen); 146 } 147 EXPORT_SYMBOL(mlx5_core_query_mkey); 148 149 static inline u32 mlx5_get_psv(u32 *out, int psv_index) 150 { 151 switch (psv_index) { 152 case 1: return MLX5_GET(create_psv_out, out, psv1_index); 153 case 2: return MLX5_GET(create_psv_out, out, psv2_index); 154 case 3: return MLX5_GET(create_psv_out, out, psv3_index); 155 default: return MLX5_GET(create_psv_out, out, psv0_index); 156 } 157 } 158 159 int mlx5_core_create_psv(struct mlx5_core_dev *dev, u32 pdn, 160 int npsvs, u32 *sig_index) 161 { 162 u32 out[MLX5_ST_SZ_DW(create_psv_out)] = {0}; 163 u32 in[MLX5_ST_SZ_DW(create_psv_in)] = {0}; 164 int i, err; 165 166 if (npsvs > MLX5_MAX_PSVS) 167 return -EINVAL; 168 169 MLX5_SET(create_psv_in, in, opcode, MLX5_CMD_OP_CREATE_PSV); 170 MLX5_SET(create_psv_in, in, pd, pdn); 171 MLX5_SET(create_psv_in, in, num_psv, npsvs); 172 173 err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out)); 174 if (err) 175 return err; 176 177 for (i = 0; i < npsvs; i++) 178 sig_index[i] = mlx5_get_psv(out, i); 179 180 return err; 181 } 182 EXPORT_SYMBOL(mlx5_core_create_psv); 183 184 int mlx5_core_destroy_psv(struct mlx5_core_dev *dev, int psv_num) 185 { 186 u32 out[MLX5_ST_SZ_DW(destroy_psv_out)] = {0}; 187 u32 in[MLX5_ST_SZ_DW(destroy_psv_in)] = {0}; 188 189 MLX5_SET(destroy_psv_in, in, opcode, MLX5_CMD_OP_DESTROY_PSV); 190 MLX5_SET(destroy_psv_in, in, psvn, psv_num); 191 return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out)); 192 } 193 EXPORT_SYMBOL(mlx5_core_destroy_psv); 194