drivers/net/mlx4/port.c

   1 /*
   2  * Copyright (c) 2007 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/errno.h>
  34 #include <linux/if_ether.h>
  35
  36 #include <linux/mlx4/cmd.h>
  37
  38 #include "mlx4.h"
  39
  40 #define MLX4_MAC_VALID          (1ull << 63)
  41 #define MLX4_MAC_MASK           0xffffffffffffULL
  42
  43 #define MLX4_VLAN_VALID         (1u << 31)
  44 #define MLX4_VLAN_MASK          0xfff
  45
  46 void mlx4_init_mac_table(struct mlx4_dev *dev, struct mlx4_mac_table *table)
  47 {
  48         int i;
  49
  50         mutex_init(&table->mutex);
  51         for (i = 0; i < MLX4_MAX_MAC_NUM; i++) {
  52                 table->entries[i] = 0;
  53                 table->refs[i]   = 0;
  54         }
  55         table->max   = 1 << dev->caps.log_num_macs;
  56         table->total = 0;
  57 }
  58
  59 void mlx4_init_vlan_table(struct mlx4_dev *dev, struct mlx4_vlan_table *table)
  60 {
  61         int i;
  62
  63         mutex_init(&table->mutex);
  64         for (i = 0; i < MLX4_MAX_VLAN_NUM; i++) {
  65                 table->entries[i] = 0;
  66                 table->refs[i]   = 0;
  67         }
  68         table->max   = 1 << dev->caps.log_num_vlans;
  69         table->total = 0;
  70 }
  71
  72 static int mlx4_set_port_mac_table(struct mlx4_dev *dev, u8 port,
  73                                    __be64 *entries)
  74 {
  75         struct mlx4_cmd_mailbox *mailbox;
  76         u32 in_mod;
  77         int err;
  78
  79         mailbox = mlx4_alloc_cmd_mailbox(dev);
  80         if (IS_ERR(mailbox))
  81                 return PTR_ERR(mailbox);
  82
  83         memcpy(mailbox->buf, entries, MLX4_MAC_TABLE_SIZE);
  84
  85         in_mod = MLX4_SET_PORT_MAC_TABLE << 8 | port;
  86         err = mlx4_cmd(dev, mailbox->dma, in_mod, 1, MLX4_CMD_SET_PORT,
  87                        MLX4_CMD_TIME_CLASS_B);
  88
  89         mlx4_free_cmd_mailbox(dev, mailbox);
  90         return err;
  91 }
  92
  93 int mlx4_register_mac(struct mlx4_dev *dev, u8 port, u64 mac, int *index)
  94 {
  95         struct mlx4_mac_table *table = &mlx4_priv(dev)->port[port].mac_table;
  96         int i, err = 0;
  97         int free = -1;
  98
  99         mlx4_dbg(dev, "Registering MAC: 0x%llx\n", (unsigned long long) mac);
 100         mutex_lock(&table->mutex);
 101         for (i = 0; i < MLX4_MAX_MAC_NUM - 1; i++) {
 102                 if (free < 0 && !table->refs[i]) {
 103                         free = i;
 104                         continue;
 105                 }
 106
 107                 if (mac == (MLX4_MAC_MASK & be64_to_cpu(table->entries[i]))) {
 108                         /* MAC already registered, increase refernce count */
 109                         *index = i;
 110                         ++table->refs[i];
 111                         goto out;
 112                 }
 113         }
 114         mlx4_dbg(dev, "Free MAC index is %d\n", free);
 115
 116         if (table->total == table->max) {
 117                 /* No free mac entries */
 118                 err = -ENOSPC;
 119                 goto out;
 120         }
 121
 122         /* Register new MAC */
 123         table->refs[free] = 1;
 124         table->entries[free] = cpu_to_be64(mac | MLX4_MAC_VALID);
 125
 126         err = mlx4_set_port_mac_table(dev, port, table->entries);
 127         if (unlikely(err)) {
 128                 mlx4_err(dev, "Failed adding MAC: 0x%llx\n", (unsigned long long) mac);
 129                 table->refs[free] = 0;
 130                 table->entries[free] = 0;
 131                 goto out;
 132         }
 133
 134         *index = free;
 135         ++table->total;
 136 out:
 137         mutex_unlock(&table->mutex);
 138         return err;
 139 }
 140 EXPORT_SYMBOL_GPL(mlx4_register_mac);
 141
 142 void mlx4_unregister_mac(struct mlx4_dev *dev, u8 port, int index)
 143 {
 144         struct mlx4_mac_table *table = &mlx4_priv(dev)->port[port].mac_table;
 145
 146         mutex_lock(&table->mutex);
 147         if (!table->refs[index]) {
 148                 mlx4_warn(dev, "No MAC entry for index %d\n", index);
 149                 goto out;
 150         }
 151         if (--table->refs[index]) {
 152                 mlx4_warn(dev, "Have more references for index %d,"
 153                           "no need to modify MAC table\n", index);
 154                 goto out;
 155         }
 156         table->entries[index] = 0;
 157         mlx4_set_port_mac_table(dev, port, table->entries);
 158         --table->total;
 159 out:
 160         mutex_unlock(&table->mutex);
 161 }
 162 EXPORT_SYMBOL_GPL(mlx4_unregister_mac);
 163
 164 static int mlx4_set_port_vlan_table(struct mlx4_dev *dev, u8 port,
 165                                     __be32 *entries)
 166 {
 167         struct mlx4_cmd_mailbox *mailbox;
 168         u32 in_mod;
 169         int err;
 170
 171         mailbox = mlx4_alloc_cmd_mailbox(dev);
 172         if (IS_ERR(mailbox))
 173                 return PTR_ERR(mailbox);
 174
 175         memcpy(mailbox->buf, entries, MLX4_VLAN_TABLE_SIZE);
 176         in_mod = MLX4_SET_PORT_VLAN_TABLE << 8 | port;
 177         err = mlx4_cmd(dev, mailbox->dma, in_mod, 1, MLX4_CMD_SET_PORT,
 178                        MLX4_CMD_TIME_CLASS_B);
 179
 180         mlx4_free_cmd_mailbox(dev, mailbox);
 181
 182         return err;
 183 }
 184
 185 int mlx4_register_vlan(struct mlx4_dev *dev, u8 port, u16 vlan, int *index)
 186 {
 187         struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;
 188         int i, err = 0;
 189         int free = -1;
 190
 191         mutex_lock(&table->mutex);
 192         for (i = MLX4_VLAN_REGULAR; i < MLX4_MAX_VLAN_NUM; i++) {
 193                 if (free < 0 && (table->refs[i] == 0)) {
 194                         free = i;
 195                         continue;
 196                 }
 197
 198                 if (table->refs[i] &&
 199                     (vlan == (MLX4_VLAN_MASK &
 200                               be32_to_cpu(table->entries[i])))) {
 201                         /* Vlan already registered, increase refernce count */
 202                         *index = i;
 203                         ++table->refs[i];
 204                         goto out;
 205                 }
 206         }
 207
 208         if (table->total == table->max) {
 209                 /* No free vlan entries */
 210                 err = -ENOSPC;
 211                 goto out;
 212         }
 213
 214         /* Register new MAC */
 215         table->refs[free] = 1;
 216         table->entries[free] = cpu_to_be32(vlan | MLX4_VLAN_VALID);
 217
 218         err = mlx4_set_port_vlan_table(dev, port, table->entries);
 219         if (unlikely(err)) {
 220                 mlx4_warn(dev, "Failed adding vlan: %u\n", vlan);
 221                 table->refs[free] = 0;
 222                 table->entries[free] = 0;
 223                 goto out;
 224         }
 225
 226         *index = free;
 227         ++table->total;
 228 out:
 229         mutex_unlock(&table->mutex);
 230         return err;
 231 }
 232 EXPORT_SYMBOL_GPL(mlx4_register_vlan);
 233
 234 void mlx4_unregister_vlan(struct mlx4_dev *dev, u8 port, int index)
 235 {
 236         struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;
 237
 238         if (index < MLX4_VLAN_REGULAR) {
 239                 mlx4_warn(dev, "Trying to free special vlan index %d\n", index);
 240                 return;
 241         }
 242
 243         mutex_lock(&table->mutex);
 244         if (!table->refs[index]) {
 245                 mlx4_warn(dev, "No vlan entry for index %d\n", index);
 246                 goto out;
 247         }
 248         if (--table->refs[index]) {
 249                 mlx4_dbg(dev, "Have more references for index %d,"
 250                          "no need to modify vlan table\n", index);
 251                 goto out;
 252         }
 253         table->entries[index] = 0;
 254         mlx4_set_port_vlan_table(dev, port, table->entries);
 255         --table->total;
 256 out:
 257         mutex_unlock(&table->mutex);
 258 }
 259 EXPORT_SYMBOL_GPL(mlx4_unregister_vlan);
 260
 261 int mlx4_get_port_ib_caps(struct mlx4_dev *dev, u8 port, __be32 *caps)
 262 {
 263         struct mlx4_cmd_mailbox *inmailbox, *outmailbox;
 264         u8 *inbuf, *outbuf;
 265         int err;
 266
 267         inmailbox = mlx4_alloc_cmd_mailbox(dev);
 268         if (IS_ERR(inmailbox))
 269                 return PTR_ERR(inmailbox);
 270
 271         outmailbox = mlx4_alloc_cmd_mailbox(dev);
 272         if (IS_ERR(outmailbox)) {
 273                 mlx4_free_cmd_mailbox(dev, inmailbox);
 274                 return PTR_ERR(outmailbox);
 275         }
 276
 277         inbuf = inmailbox->buf;
 278         outbuf = outmailbox->buf;
 279         memset(inbuf, 0, 256);
 280         memset(outbuf, 0, 256);
 281         inbuf[0] = 1;
 282         inbuf[1] = 1;
 283         inbuf[2] = 1;
 284         inbuf[3] = 1;
 285         *(__be16 *) (&inbuf[16]) = cpu_to_be16(0x0015);
 286         *(__be32 *) (&inbuf[20]) = cpu_to_be32(port);
 287
 288         err = mlx4_cmd_box(dev, inmailbox->dma, outmailbox->dma, port, 3,
 289                            MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C);
 290         if (!err)
 291                 *caps = *(__be32 *) (outbuf + 84);
 292         mlx4_free_cmd_mailbox(dev, inmailbox);
 293         mlx4_free_cmd_mailbox(dev, outmailbox);
 294         return err;
 295 }
 296
 297 int mlx4_SET_PORT(struct mlx4_dev *dev, u8 port)
 298 {
 299         struct mlx4_cmd_mailbox *mailbox;
 300         int err;
 301
 302         if (dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH)
 303                 return 0;
 304
 305         mailbox = mlx4_alloc_cmd_mailbox(dev);
 306         if (IS_ERR(mailbox))
 307                 return PTR_ERR(mailbox);
 308
 309         memset(mailbox->buf, 0, 256);
 310
 311         ((__be32 *) mailbox->buf)[1] = dev->caps.ib_port_def_cap[port];
 312         err = mlx4_cmd(dev, mailbox->dma, port, 0, MLX4_CMD_SET_PORT,
 313                        MLX4_CMD_TIME_CLASS_B);
 314
 315         mlx4_free_cmd_mailbox(dev, mailbox);
 316         return err;
 317 }