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 xa_init_flags(&dev->priv.mkey_table, XA_FLAGS_LOCK_IRQ); 42 } 43 44 void mlx5_cleanup_mkey_table(struct mlx5_core_dev *dev) 45 { 46 WARN_ON(!xa_empty(&dev->priv.mkey_table)); 47 } 48 49 int mlx5_core_create_mkey_cb(struct mlx5_core_dev *dev, 50 struct mlx5_core_mkey *mkey, 51 struct mlx5_async_ctx *async_ctx, u32 *in, 52 int inlen, u32 *out, int outlen, 53 mlx5_async_cbk_t callback, 54 struct mlx5_async_work *context) 55 { 56 u32 lout[MLX5_ST_SZ_DW(create_mkey_out)] = {0}; 57 struct xarray *mkeys = &dev->priv.mkey_table; 58 u32 mkey_index; 59 void *mkc; 60 int err; 61 u8 key; 62 63 spin_lock_irq(&dev->priv.mkey_lock); 64 key = dev->priv.mkey_key++; 65 spin_unlock_irq(&dev->priv.mkey_lock); 66 mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry); 67 68 MLX5_SET(create_mkey_in, in, opcode, MLX5_CMD_OP_CREATE_MKEY); 69 MLX5_SET(mkc, mkc, mkey_7_0, key); 70 71 if (callback) 72 return mlx5_cmd_exec_cb(async_ctx, in, inlen, out, outlen, 73 callback, context); 74 75 err = mlx5_cmd_exec(dev, in, inlen, lout, sizeof(lout)); 76 if (err) 77 return err; 78 79 mkey_index = MLX5_GET(create_mkey_out, lout, mkey_index); 80 mkey->iova = MLX5_GET64(mkc, mkc, start_addr); 81 mkey->size = MLX5_GET64(mkc, mkc, len); 82 mkey->key = mlx5_idx_to_mkey(mkey_index) | key; 83 mkey->pd = MLX5_GET(mkc, mkc, pd); 84 85 mlx5_core_dbg(dev, "out 0x%x, key 0x%x, mkey 0x%x\n", 86 mkey_index, key, mkey->key); 87 88 err = xa_err(xa_store_irq(mkeys, mlx5_base_mkey(mkey->key), mkey, 89 GFP_KERNEL)); 90 if (err) { 91 mlx5_core_warn(dev, "failed xarray insert of mkey 0x%x, %d\n", 92 mlx5_base_mkey(mkey->key), err); 93 mlx5_core_destroy_mkey(dev, mkey); 94 } 95 96 return err; 97 } 98 EXPORT_SYMBOL(mlx5_core_create_mkey_cb); 99 100 int mlx5_core_create_mkey(struct mlx5_core_dev *dev, 101 struct mlx5_core_mkey *mkey, 102 u32 *in, int inlen) 103 { 104 return mlx5_core_create_mkey_cb(dev, mkey, NULL, in, inlen, 105 NULL, 0, NULL, NULL); 106 } 107 EXPORT_SYMBOL(mlx5_core_create_mkey); 108 109 int mlx5_core_destroy_mkey(struct mlx5_core_dev *dev, 110 struct mlx5_core_mkey *mkey) 111 { 112 u32 out[MLX5_ST_SZ_DW(destroy_mkey_out)] = {0}; 113 u32 in[MLX5_ST_SZ_DW(destroy_mkey_in)] = {0}; 114 struct xarray *mkeys = &dev->priv.mkey_table; 115 unsigned long flags; 116 117 xa_lock_irqsave(mkeys, flags); 118 __xa_erase(mkeys, mlx5_base_mkey(mkey->key)); 119 xa_unlock_irqrestore(mkeys, flags); 120 121 MLX5_SET(destroy_mkey_in, in, opcode, MLX5_CMD_OP_DESTROY_MKEY); 122 MLX5_SET(destroy_mkey_in, in, mkey_index, mlx5_mkey_to_idx(mkey->key)); 123 return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out)); 124 } 125 EXPORT_SYMBOL(mlx5_core_destroy_mkey); 126 127 int mlx5_core_query_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mkey *mkey, 128 u32 *out, int outlen) 129 { 130 u32 in[MLX5_ST_SZ_DW(query_mkey_in)] = {0}; 131 132 memset(out, 0, outlen); 133 MLX5_SET(query_mkey_in, in, opcode, MLX5_CMD_OP_QUERY_MKEY); 134 MLX5_SET(query_mkey_in, in, mkey_index, mlx5_mkey_to_idx(mkey->key)); 135 return mlx5_cmd_exec(dev, in, sizeof(in), out, outlen); 136 } 137 EXPORT_SYMBOL(mlx5_core_query_mkey); 138 139 static inline u32 mlx5_get_psv(u32 *out, int psv_index) 140 { 141 switch (psv_index) { 142 case 1: return MLX5_GET(create_psv_out, out, psv1_index); 143 case 2: return MLX5_GET(create_psv_out, out, psv2_index); 144 case 3: return MLX5_GET(create_psv_out, out, psv3_index); 145 default: return MLX5_GET(create_psv_out, out, psv0_index); 146 } 147 } 148 149 int mlx5_core_create_psv(struct mlx5_core_dev *dev, u32 pdn, 150 int npsvs, u32 *sig_index) 151 { 152 u32 out[MLX5_ST_SZ_DW(create_psv_out)] = {0}; 153 u32 in[MLX5_ST_SZ_DW(create_psv_in)] = {0}; 154 int i, err; 155 156 if (npsvs > MLX5_MAX_PSVS) 157 return -EINVAL; 158 159 MLX5_SET(create_psv_in, in, opcode, MLX5_CMD_OP_CREATE_PSV); 160 MLX5_SET(create_psv_in, in, pd, pdn); 161 MLX5_SET(create_psv_in, in, num_psv, npsvs); 162 163 err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out)); 164 if (err) 165 return err; 166 167 for (i = 0; i < npsvs; i++) 168 sig_index[i] = mlx5_get_psv(out, i); 169 170 return err; 171 } 172 EXPORT_SYMBOL(mlx5_core_create_psv); 173 174 int mlx5_core_destroy_psv(struct mlx5_core_dev *dev, int psv_num) 175 { 176 u32 out[MLX5_ST_SZ_DW(destroy_psv_out)] = {0}; 177 u32 in[MLX5_ST_SZ_DW(destroy_psv_in)] = {0}; 178 179 MLX5_SET(destroy_psv_in, in, opcode, MLX5_CMD_OP_DESTROY_PSV); 180 MLX5_SET(destroy_psv_in, in, psvn, psv_num); 181 return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out)); 182 } 183 EXPORT_SYMBOL(mlx5_core_destroy_psv); 184