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

   1 /*
   2  * Copyright (c) 2013, Mellanox Technologies inc.  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         rwlock_init(&table->lock);
  44         INIT_RADIX_TREE(&table->tree, GFP_ATOMIC);
  45 }
  46
  47 void mlx5_cleanup_mr_table(struct mlx5_core_dev *dev)
  48 {
  49 }
  50
  51 int mlx5_core_create_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mr *mr,
  52                           struct mlx5_create_mkey_mbox_in *in, int inlen,
  53                           mlx5_cmd_cbk_t callback, void *context,
  54                           struct mlx5_create_mkey_mbox_out *out)
  55 {
  56         struct mlx5_mr_table *table = &dev->priv.mr_table;
  57         struct mlx5_create_mkey_mbox_out lout;
  58         int err;
  59         u8 key;
  60
  61         memset(&lout, 0, sizeof(lout));
  62         spin_lock_irq(&dev->priv.mkey_lock);
  63         key = dev->priv.mkey_key++;
  64         spin_unlock_irq(&dev->priv.mkey_lock);
  65         in->seg.qpn_mkey7_0 |= cpu_to_be32(key);
  66         in->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_CREATE_MKEY);
  67         if (callback) {
  68                 err = mlx5_cmd_exec_cb(dev, in, inlen, out, sizeof(*out),
  69                                        callback, context);
  70                 return err;
  71         } else {
  72                 err = mlx5_cmd_exec(dev, in, inlen, &lout, sizeof(lout));
  73         }
  74
  75         if (err) {
  76                 mlx5_core_dbg(dev, "cmd exec faile %d\n", err);
  77                 return err;
  78         }
  79
  80         if (lout.hdr.status) {
  81                 mlx5_core_dbg(dev, "status %d\n", lout.hdr.status);
  82                 return mlx5_cmd_status_to_err(&lout.hdr);
  83         }
  84
  85         mr->key = mlx5_idx_to_mkey(be32_to_cpu(lout.mkey) & 0xffffff) | key;
  86         mlx5_core_dbg(dev, "out 0x%x, key 0x%x, mkey 0x%x\n",
  87                       be32_to_cpu(lout.mkey), key, mr->key);
  88
  89         /* connect to MR tree */
  90         write_lock_irq(&table->lock);
  91         err = radix_tree_insert(&table->tree, mlx5_base_mkey(mr->key), mr);
  92         write_unlock_irq(&table->lock);
  93
  94         return err;
  95 }
  96 EXPORT_SYMBOL(mlx5_core_create_mkey);
  97
  98 int mlx5_core_destroy_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mr *mr)
  99 {
 100         struct mlx5_mr_table *table = &dev->priv.mr_table;
 101         struct mlx5_destroy_mkey_mbox_in in;
 102         struct mlx5_destroy_mkey_mbox_out out;
 103         unsigned long flags;
 104         int err;
 105
 106         memset(&in, 0, sizeof(in));
 107         memset(&out, 0, sizeof(out));
 108
 109         in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DESTROY_MKEY);
 110         in.mkey = cpu_to_be32(mlx5_mkey_to_idx(mr->key));
 111         err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
 112         if (err)
 113                 return err;
 114
 115         if (out.hdr.status)
 116                 return mlx5_cmd_status_to_err(&out.hdr);
 117
 118         write_lock_irqsave(&table->lock, flags);
 119         radix_tree_delete(&table->tree, mlx5_base_mkey(mr->key));
 120         write_unlock_irqrestore(&table->lock, flags);
 121
 122         return err;
 123 }
 124 EXPORT_SYMBOL(mlx5_core_destroy_mkey);
 125
 126 int mlx5_core_query_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mr *mr,
 127                          struct mlx5_query_mkey_mbox_out *out, int outlen)
 128 {
 129         struct mlx5_destroy_mkey_mbox_in in;
 130         int err;
 131
 132         memset(&in, 0, sizeof(in));
 133         memset(out, 0, outlen);
 134
 135         in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_MKEY);
 136         in.mkey = cpu_to_be32(mlx5_mkey_to_idx(mr->key));
 137         err = mlx5_cmd_exec(dev, &in, sizeof(in), out, outlen);
 138         if (err)
 139                 return err;
 140
 141         if (out->hdr.status)
 142                 return mlx5_cmd_status_to_err(&out->hdr);
 143
 144         return err;
 145 }
 146 EXPORT_SYMBOL(mlx5_core_query_mkey);
 147
 148 int mlx5_core_dump_fill_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mr *mr,
 149                              u32 *mkey)
 150 {
 151         struct mlx5_query_special_ctxs_mbox_in in;
 152         struct mlx5_query_special_ctxs_mbox_out out;
 153         int err;
 154
 155         memset(&in, 0, sizeof(in));
 156         memset(&out, 0, sizeof(out));
 157
 158         in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS);
 159         err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
 160         if (err)
 161                 return err;
 162
 163         if (out.hdr.status)
 164                 return mlx5_cmd_status_to_err(&out.hdr);
 165
 166         *mkey = be32_to_cpu(out.dump_fill_mkey);
 167
 168         return err;
 169 }
 170 EXPORT_SYMBOL(mlx5_core_dump_fill_mkey);
 171
 172 int mlx5_core_create_psv(struct mlx5_core_dev *dev, u32 pdn,
 173                          int npsvs, u32 *sig_index)
 174 {
 175         struct mlx5_allocate_psv_in in;
 176         struct mlx5_allocate_psv_out out;
 177         int i, err;
 178
 179         if (npsvs > MLX5_MAX_PSVS)
 180                 return -EINVAL;
 181
 182         memset(&in, 0, sizeof(in));
 183         memset(&out, 0, sizeof(out));
 184
 185         in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_CREATE_PSV);
 186         in.npsv_pd = cpu_to_be32((npsvs << 28) | pdn);
 187         err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
 188         if (err) {
 189                 mlx5_core_err(dev, "cmd exec failed %d\n", err);
 190                 return err;
 191         }
 192
 193         if (out.hdr.status) {
 194                 mlx5_core_err(dev, "create_psv bad status %d\n", out.hdr.status);
 195                 return mlx5_cmd_status_to_err(&out.hdr);
 196         }
 197
 198         for (i = 0; i < npsvs; i++)
 199                 sig_index[i] = be32_to_cpu(out.psv_idx[i]) & 0xffffff;
 200
 201         return err;
 202 }
 203 EXPORT_SYMBOL(mlx5_core_create_psv);
 204
 205 int mlx5_core_destroy_psv(struct mlx5_core_dev *dev, int psv_num)
 206 {
 207         struct mlx5_destroy_psv_in in;
 208         struct mlx5_destroy_psv_out out;
 209         int err;
 210
 211         memset(&in, 0, sizeof(in));
 212         memset(&out, 0, sizeof(out));
 213
 214         in.psv_number = cpu_to_be32(psv_num);
 215         in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DESTROY_PSV);
 216         err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
 217         if (err) {
 218                 mlx5_core_err(dev, "destroy_psv cmd exec failed %d\n", err);
 219                 goto out;
 220         }
 221
 222         if (out.hdr.status) {
 223                 mlx5_core_err(dev, "destroy_psv bad status %d\n", out.hdr.status);
 224                 err = mlx5_cmd_status_to_err(&out.hdr);
 225                 goto out;
 226         }
 227
 228 out:
 229         return err;
 230 }
 231 EXPORT_SYMBOL(mlx5_core_destroy_psv);