drivers/net/ethernet/mellanox/mlx5/core/mr.c

   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_warn(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 int mlx5_core_dump_fill_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mkey *_mkey,
 150                              u32 *mkey)
 151 {
 152         u32 out[MLX5_ST_SZ_DW(query_special_contexts_out)] = {0};
 153         u32 in[MLX5_ST_SZ_DW(query_special_contexts_in)]   = {0};
 154         int err;
 155
 156         MLX5_SET(query_special_contexts_in, in, opcode,
 157                  MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS);
 158         err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
 159         if (!err)
 160                 *mkey = MLX5_GET(query_special_contexts_out, out,
 161                                  dump_fill_mkey);
 162         return err;
 163 }
 164 EXPORT_SYMBOL(mlx5_core_dump_fill_mkey);
 165
 166 static inline u32 mlx5_get_psv(u32 *out, int psv_index)
 167 {
 168         switch (psv_index) {
 169         case 1: return MLX5_GET(create_psv_out, out, psv1_index);
 170         case 2: return MLX5_GET(create_psv_out, out, psv2_index);
 171         case 3: return MLX5_GET(create_psv_out, out, psv3_index);
 172         default: return MLX5_GET(create_psv_out, out, psv0_index);
 173         }
 174 }
 175
 176 int mlx5_core_create_psv(struct mlx5_core_dev *dev, u32 pdn,
 177                          int npsvs, u32 *sig_index)
 178 {
 179         u32 out[MLX5_ST_SZ_DW(create_psv_out)] = {0};
 180         u32 in[MLX5_ST_SZ_DW(create_psv_in)]   = {0};
 181         int i, err;
 182
 183         if (npsvs > MLX5_MAX_PSVS)
 184                 return -EINVAL;
 185
 186         MLX5_SET(create_psv_in, in, opcode, MLX5_CMD_OP_CREATE_PSV);
 187         MLX5_SET(create_psv_in, in, pd, pdn);
 188         MLX5_SET(create_psv_in, in, num_psv, npsvs);
 189
 190         err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
 191         if (err)
 192                 return err;
 193
 194         for (i = 0; i < npsvs; i++)
 195                 sig_index[i] = mlx5_get_psv(out, i);
 196
 197         return err;
 198 }
 199 EXPORT_SYMBOL(mlx5_core_create_psv);
 200
 201 int mlx5_core_destroy_psv(struct mlx5_core_dev *dev, int psv_num)
 202 {
 203         u32 out[MLX5_ST_SZ_DW(destroy_psv_out)] = {0};
 204         u32 in[MLX5_ST_SZ_DW(destroy_psv_in)]   = {0};
 205
 206         MLX5_SET(destroy_psv_in, in, opcode, MLX5_CMD_OP_DESTROY_PSV);
 207         MLX5_SET(destroy_psv_in, in, psvn, psv_num);
 208         return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
 209 }
 210 EXPORT_SYMBOL(mlx5_core_destroy_psv);