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(struct mlx5_core_dev *dev,
  53                           struct mlx5_core_mkey *mkey,
  54                           struct mlx5_create_mkey_mbox_in *in, int inlen,
  55                           mlx5_cmd_cbk_t callback, void *context,
  56                           struct mlx5_create_mkey_mbox_out *out)
  57 {
  58         struct mlx5_mkey_table *table = &dev->priv.mkey_table;
  59         struct mlx5_create_mkey_mbox_out lout;
  60         int err;
  61         u8 key;
  62
  63         memset(&lout, 0, sizeof(lout));
  64         spin_lock_irq(&dev->priv.mkey_lock);
  65         key = dev->priv.mkey_key++;
  66         spin_unlock_irq(&dev->priv.mkey_lock);
  67         in->seg.qpn_mkey7_0 |= cpu_to_be32(key);
  68         in->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_CREATE_MKEY);
  69         if (callback) {
  70                 err = mlx5_cmd_exec_cb(dev, in, inlen, out, sizeof(*out),
  71                                        callback, context);
  72                 return err;
  73         } else {
  74                 err = mlx5_cmd_exec(dev, in, inlen, &lout, sizeof(lout));
  75         }
  76
  77         if (err) {
  78                 mlx5_core_dbg(dev, "cmd exec failed %d\n", err);
  79                 return err;
  80         }
  81
  82         if (lout.hdr.status) {
  83                 mlx5_core_dbg(dev, "status %d\n", lout.hdr.status);
  84                 return mlx5_cmd_status_to_err(&lout.hdr);
  85         }
  86
  87         mkey->iova = be64_to_cpu(in->seg.start_addr);
  88         mkey->size = be64_to_cpu(in->seg.len);
  89         mkey->key = mlx5_idx_to_mkey(be32_to_cpu(lout.mkey) & 0xffffff) | key;
  90         mkey->pd = be32_to_cpu(in->seg.flags_pd) & 0xffffff;
  91
  92         mlx5_core_dbg(dev, "out 0x%x, key 0x%x, mkey 0x%x\n",
  93                       be32_to_cpu(lout.mkey), key, mkey->key);
  94
  95         /* connect to mkey tree */
  96         write_lock_irq(&table->lock);
  97         err = radix_tree_insert(&table->tree, mlx5_base_mkey(mkey->key), mkey);
  98         write_unlock_irq(&table->lock);
  99         if (err) {
 100                 mlx5_core_warn(dev, "failed radix tree insert of mkey 0x%x, %d\n",
 101                                mlx5_base_mkey(mkey->key), err);
 102                 mlx5_core_destroy_mkey(dev, mkey);
 103         }
 104
 105         return err;
 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         struct mlx5_mkey_table *table = &dev->priv.mkey_table;
 113         struct mlx5_destroy_mkey_mbox_in in;
 114         struct mlx5_destroy_mkey_mbox_out out;
 115         struct mlx5_core_mkey *deleted_mkey;
 116         unsigned long flags;
 117         int err;
 118
 119         memset(&in, 0, sizeof(in));
 120         memset(&out, 0, sizeof(out));
 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         in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DESTROY_MKEY);
 132         in.mkey = cpu_to_be32(mlx5_mkey_to_idx(mkey->key));
 133         err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
 134         if (err)
 135                 return err;
 136
 137         if (out.hdr.status)
 138                 return mlx5_cmd_status_to_err(&out.hdr);
 139
 140         return err;
 141 }
 142 EXPORT_SYMBOL(mlx5_core_destroy_mkey);
 143
 144 int mlx5_core_query_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mkey *mkey,
 145                          struct mlx5_query_mkey_mbox_out *out, int outlen)
 146 {
 147         struct mlx5_query_mkey_mbox_in in;
 148         int err;
 149
 150         memset(&in, 0, sizeof(in));
 151         memset(out, 0, outlen);
 152
 153         in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_MKEY);
 154         in.mkey = cpu_to_be32(mlx5_mkey_to_idx(mkey->key));
 155         err = mlx5_cmd_exec(dev, &in, sizeof(in), out, outlen);
 156         if (err)
 157                 return err;
 158
 159         if (out->hdr.status)
 160                 return mlx5_cmd_status_to_err(&out->hdr);
 161
 162         return err;
 163 }
 164 EXPORT_SYMBOL(mlx5_core_query_mkey);
 165
 166 int mlx5_core_dump_fill_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mkey *_mkey,
 167                              u32 *mkey)
 168 {
 169         struct mlx5_query_special_ctxs_mbox_in in;
 170         struct mlx5_query_special_ctxs_mbox_out out;
 171         int err;
 172
 173         memset(&in, 0, sizeof(in));
 174         memset(&out, 0, sizeof(out));
 175
 176         in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS);
 177         err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
 178         if (err)
 179                 return err;
 180
 181         if (out.hdr.status)
 182                 return mlx5_cmd_status_to_err(&out.hdr);
 183
 184         *mkey = be32_to_cpu(out.dump_fill_mkey);
 185
 186         return err;
 187 }
 188 EXPORT_SYMBOL(mlx5_core_dump_fill_mkey);
 189
 190 int mlx5_core_create_psv(struct mlx5_core_dev *dev, u32 pdn,
 191                          int npsvs, u32 *sig_index)
 192 {
 193         struct mlx5_allocate_psv_in in;
 194         struct mlx5_allocate_psv_out out;
 195         int i, err;
 196
 197         if (npsvs > MLX5_MAX_PSVS)
 198                 return -EINVAL;
 199
 200         memset(&in, 0, sizeof(in));
 201         memset(&out, 0, sizeof(out));
 202
 203         in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_CREATE_PSV);
 204         in.npsv_pd = cpu_to_be32((npsvs << 28) | pdn);
 205         err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
 206         if (err) {
 207                 mlx5_core_err(dev, "cmd exec failed %d\n", err);
 208                 return err;
 209         }
 210
 211         if (out.hdr.status) {
 212                 mlx5_core_err(dev, "create_psv bad status %d\n",
 213                               out.hdr.status);
 214                 return mlx5_cmd_status_to_err(&out.hdr);
 215         }
 216
 217         for (i = 0; i < npsvs; i++)
 218                 sig_index[i] = be32_to_cpu(out.psv_idx[i]) & 0xffffff;
 219
 220         return err;
 221 }
 222 EXPORT_SYMBOL(mlx5_core_create_psv);
 223
 224 int mlx5_core_destroy_psv(struct mlx5_core_dev *dev, int psv_num)
 225 {
 226         struct mlx5_destroy_psv_in in;
 227         struct mlx5_destroy_psv_out out;
 228         int err;
 229
 230         memset(&in, 0, sizeof(in));
 231         memset(&out, 0, sizeof(out));
 232
 233         in.psv_number = cpu_to_be32(psv_num);
 234         in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DESTROY_PSV);
 235         err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
 236         if (err) {
 237                 mlx5_core_err(dev, "destroy_psv cmd exec failed %d\n", err);
 238                 goto out;
 239         }
 240
 241         if (out.hdr.status) {
 242                 mlx5_core_err(dev, "destroy_psv bad status %d\n",
 243                               out.hdr.status);
 244                 err = mlx5_cmd_status_to_err(&out.hdr);
 245                 goto out;
 246         }
 247
 248 out:
 249         return err;
 250 }
 251 EXPORT_SYMBOL(mlx5_core_destroy_psv);