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

DEFINITIONS

1. mlx5_init_mkey_table
2. mlx5_cleanup_mkey_table
3. mlx5_core_create_mkey_cb
4. mlx5_core_create_mkey
5. mlx5_core_destroy_mkey
6. mlx5_core_query_mkey
7. mlx5_get_psv
8. mlx5_core_create_psv
9. mlx5_core_destroy_psv

   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);