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_mr_table(struct mlx5_core_dev *dev)
  40 {
  41         struct mlx5_mr_table *table = &dev->priv.mr_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_mr_table(struct mlx5_core_dev *dev)
  49 {
  50 }
  51
  52 int mlx5_core_create_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mr *mr,
  53                           struct mlx5_create_mkey_mbox_in *in, int inlen,
  54                           mlx5_cmd_cbk_t callback, void *context,
  55                           struct mlx5_create_mkey_mbox_out *out)
  56 {
  57         struct mlx5_mr_table *table = &dev->priv.mr_table;
  58         struct mlx5_create_mkey_mbox_out lout;
  59         int err;
  60         u8 key;
  61
  62         memset(&lout, 0, sizeof(lout));
  63         spin_lock_irq(&dev->priv.mkey_lock);
  64         key = dev->priv.mkey_key++;
  65         spin_unlock_irq(&dev->priv.mkey_lock);
  66         in->seg.qpn_mkey7_0 |= cpu_to_be32(key);
  67         in->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_CREATE_MKEY);
  68         if (callback) {
  69                 err = mlx5_cmd_exec_cb(dev, in, inlen, out, sizeof(*out),
  70                                        callback, context);
  71                 return err;
  72         } else {
  73                 err = mlx5_cmd_exec(dev, in, inlen, &lout, sizeof(lout));
  74         }
  75
  76         if (err) {
  77                 mlx5_core_dbg(dev, "cmd exec failed %d\n", err);
  78                 return err;
  79         }
  80
  81         if (lout.hdr.status) {
  82                 mlx5_core_dbg(dev, "status %d\n", lout.hdr.status);
  83                 return mlx5_cmd_status_to_err(&lout.hdr);
  84         }
  85
  86         mr->iova = be64_to_cpu(in->seg.start_addr);
  87         mr->size = be64_to_cpu(in->seg.len);
  88         mr->key = mlx5_idx_to_mkey(be32_to_cpu(lout.mkey) & 0xffffff) | key;
  89         mr->pd = be32_to_cpu(in->seg.flags_pd) & 0xffffff;
  90
  91         mlx5_core_dbg(dev, "out 0x%x, key 0x%x, mkey 0x%x\n",
  92                       be32_to_cpu(lout.mkey), key, mr->key);
  93
  94         /* connect to MR tree */
  95         write_lock_irq(&table->lock);
  96         err = radix_tree_insert(&table->tree, mlx5_base_mkey(mr->key), mr);
  97         write_unlock_irq(&table->lock);
  98         if (err) {
  99                 mlx5_core_warn(dev, "failed radix tree insert of mr 0x%x, %d\n",
 100                                mlx5_base_mkey(mr->key), err);
 101                 mlx5_core_destroy_mkey(dev, mr);
 102         }
 103
 104         return err;
 105 }
 106 EXPORT_SYMBOL(mlx5_core_create_mkey);
 107
 108 int mlx5_core_destroy_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mr *mr)
 109 {
 110         struct mlx5_mr_table *table = &dev->priv.mr_table;
 111         struct mlx5_destroy_mkey_mbox_in in;
 112         struct mlx5_destroy_mkey_mbox_out out;
 113         struct mlx5_core_mr *deleted_mr;
 114         unsigned long flags;
 115         int err;
 116
 117         memset(&in, 0, sizeof(in));
 118         memset(&out, 0, sizeof(out));
 119
 120         write_lock_irqsave(&table->lock, flags);
 121         deleted_mr = radix_tree_delete(&table->tree, mlx5_base_mkey(mr->key));
 122         write_unlock_irqrestore(&table->lock, flags);
 123         if (!deleted_mr) {
 124                 mlx5_core_warn(dev, "failed radix tree delete of mr 0x%x\n",
 125                                mlx5_base_mkey(mr->key));
 126                 return -ENOENT;
 127         }
 128
 129         in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DESTROY_MKEY);
 130         in.mkey = cpu_to_be32(mlx5_mkey_to_idx(mr->key));
 131         err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
 132         if (err)
 133                 return err;
 134
 135         if (out.hdr.status)
 136                 return mlx5_cmd_status_to_err(&out.hdr);
 137
 138         return err;
 139 }
 140 EXPORT_SYMBOL(mlx5_core_destroy_mkey);
 141
 142 int mlx5_core_query_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mr *mr,
 143                          struct mlx5_query_mkey_mbox_out *out, int outlen)
 144 {
 145         struct mlx5_query_mkey_mbox_in in;
 146         int err;
 147
 148         memset(&in, 0, sizeof(in));
 149         memset(out, 0, outlen);
 150
 151         in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_MKEY);
 152         in.mkey = cpu_to_be32(mlx5_mkey_to_idx(mr->key));
 153         err = mlx5_cmd_exec(dev, &in, sizeof(in), out, outlen);
 154         if (err)
 155                 return err;
 156
 157         if (out->hdr.status)
 158                 return mlx5_cmd_status_to_err(&out->hdr);
 159
 160         return err;
 161 }
 162 EXPORT_SYMBOL(mlx5_core_query_mkey);
 163
 164 int mlx5_core_dump_fill_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mr *mr,
 165                              u32 *mkey)
 166 {
 167         struct mlx5_query_special_ctxs_mbox_in in;
 168         struct mlx5_query_special_ctxs_mbox_out out;
 169         int err;
 170
 171         memset(&in, 0, sizeof(in));
 172         memset(&out, 0, sizeof(out));
 173
 174         in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS);
 175         err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
 176         if (err)
 177                 return err;
 178
 179         if (out.hdr.status)
 180                 return mlx5_cmd_status_to_err(&out.hdr);
 181
 182         *mkey = be32_to_cpu(out.dump_fill_mkey);
 183
 184         return err;
 185 }
 186 EXPORT_SYMBOL(mlx5_core_dump_fill_mkey);
 187
 188 int mlx5_core_create_psv(struct mlx5_core_dev *dev, u32 pdn,
 189                          int npsvs, u32 *sig_index)
 190 {
 191         struct mlx5_allocate_psv_in in;
 192         struct mlx5_allocate_psv_out out;
 193         int i, err;
 194
 195         if (npsvs > MLX5_MAX_PSVS)
 196                 return -EINVAL;
 197
 198         memset(&in, 0, sizeof(in));
 199         memset(&out, 0, sizeof(out));
 200
 201         in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_CREATE_PSV);
 202         in.npsv_pd = cpu_to_be32((npsvs << 28) | pdn);
 203         err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
 204         if (err) {
 205                 mlx5_core_err(dev, "cmd exec failed %d\n", err);
 206                 return err;
 207         }
 208
 209         if (out.hdr.status) {
 210                 mlx5_core_err(dev, "create_psv bad status %d\n",
 211                               out.hdr.status);
 212                 return mlx5_cmd_status_to_err(&out.hdr);
 213         }
 214
 215         for (i = 0; i < npsvs; i++)
 216                 sig_index[i] = be32_to_cpu(out.psv_idx[i]) & 0xffffff;
 217
 218         return err;
 219 }
 220 EXPORT_SYMBOL(mlx5_core_create_psv);
 221
 222 int mlx5_core_destroy_psv(struct mlx5_core_dev *dev, int psv_num)
 223 {
 224         struct mlx5_destroy_psv_in in;
 225         struct mlx5_destroy_psv_out out;
 226         int err;
 227
 228         memset(&in, 0, sizeof(in));
 229         memset(&out, 0, sizeof(out));
 230
 231         in.psv_number = cpu_to_be32(psv_num);
 232         in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DESTROY_PSV);
 233         err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
 234         if (err) {
 235                 mlx5_core_err(dev, "destroy_psv cmd exec failed %d\n", err);
 236                 goto out;
 237         }
 238
 239         if (out.hdr.status) {
 240                 mlx5_core_err(dev, "destroy_psv bad status %d\n",
 241                               out.hdr.status);
 242                 err = mlx5_cmd_status_to_err(&out.hdr);
 243                 goto out;
 244         }
 245
 246 out:
 247         return err;
 248 }
 249 EXPORT_SYMBOL(mlx5_core_destroy_psv);