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
 115         if (free < 0) {
 116                 err = -ENOMEM;
 117                 goto out;
 118         }
 119
 120         mlx4_dbg(dev, "Free MAC index is %d\n", free);
 121
 122         if (table->total == table->max) {
 123                 /* No free mac entries */
 124                 err = -ENOSPC;
 125                 goto out;
 126         }
 127
 128         /* Register new MAC */
 129         table->refs[free] = 1;
 130         table->entries[free] = cpu_to_be64(mac | MLX4_MAC_VALID);
 131
 132         err = mlx4_set_port_mac_table(dev, port, table->entries);
 133         if (unlikely(err)) {
 134                 mlx4_err(dev, "Failed adding MAC: 0x%llx\n", (unsigned long long) mac);
 135                 table->refs[free] = 0;
 136                 table->entries[free] = 0;
 137                 goto out;
 138         }
 139
 140         *index = free;
 141         ++table->total;
 142 out:
 143         mutex_unlock(&table->mutex);
 144         return err;
 145 }
 146 EXPORT_SYMBOL_GPL(mlx4_register_mac);
 147
 148 void mlx4_unregister_mac(struct mlx4_dev *dev, u8 port, int index)
 149 {
 150         struct mlx4_mac_table *table = &mlx4_priv(dev)->port[port].mac_table;
 151
 152         mutex_lock(&table->mutex);
 153         if (!table->refs[index]) {
 154                 mlx4_warn(dev, "No MAC entry for index %d\n", index);
 155                 goto out;
 156         }
 157         if (--table->refs[index]) {
 158                 mlx4_warn(dev, "Have more references for index %d,"
 159                           "no need to modify MAC table\n", index);
 160                 goto out;
 161         }
 162         table->entries[index] = 0;
 163         mlx4_set_port_mac_table(dev, port, table->entries);
 164         --table->total;
 165 out:
 166         mutex_unlock(&table->mutex);
 167 }
 168 EXPORT_SYMBOL_GPL(mlx4_unregister_mac);
 169
 170 static int mlx4_set_port_vlan_table(struct mlx4_dev *dev, u8 port,
 171                                     __be32 *entries)
 172 {
 173         struct mlx4_cmd_mailbox *mailbox;
 174         u32 in_mod;
 175         int err;
 176
 177         mailbox = mlx4_alloc_cmd_mailbox(dev);
 178         if (IS_ERR(mailbox))
 179                 return PTR_ERR(mailbox);
 180
 181         memcpy(mailbox->buf, entries, MLX4_VLAN_TABLE_SIZE);
 182         in_mod = MLX4_SET_PORT_VLAN_TABLE << 8 | port;
 183         err = mlx4_cmd(dev, mailbox->dma, in_mod, 1, MLX4_CMD_SET_PORT,
 184                        MLX4_CMD_TIME_CLASS_B);
 185
 186         mlx4_free_cmd_mailbox(dev, mailbox);
 187
 188         return err;
 189 }
 190
 191 int mlx4_find_cached_vlan(struct mlx4_dev *dev, u8 port, u16 vid, int *idx)
 192 {
 193         struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;
 194         int i;
 195
 196         for (i = 0; i < MLX4_MAX_VLAN_NUM; ++i) {
 197                 if (table->refs[i] &&
 198                     (vid == (MLX4_VLAN_MASK &
 199                               be32_to_cpu(table->entries[i])))) {
 200                         /* VLAN already registered, increase reference count */
 201                         *idx = i;
 202                         return 0;
 203                 }
 204         }
 205
 206         return -ENOENT;
 207 }
 208 EXPORT_SYMBOL_GPL(mlx4_find_cached_vlan);
 209
 210 int mlx4_register_vlan(struct mlx4_dev *dev, u8 port, u16 vlan, int *index)
 211 {
 212         struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;
 213         int i, err = 0;
 214         int free = -1;
 215
 216         mutex_lock(&table->mutex);
 217         for (i = MLX4_VLAN_REGULAR; i < MLX4_MAX_VLAN_NUM; i++) {
 218                 if (free < 0 && (table->refs[i] == 0)) {
 219                         free = i;
 220                         continue;
 221                 }
 222
 223                 if (table->refs[i] &&
 224                     (vlan == (MLX4_VLAN_MASK &
 225                               be32_to_cpu(table->entries[i])))) {
 226                         /* Vlan already registered, increase refernce count */
 227                         *index = i;
 228                         ++table->refs[i];
 229                         goto out;
 230                 }
 231         }
 232
 233         if (free < 0) {
 234                 err = -ENOMEM;
 235                 goto out;
 236         }
 237
 238         if (table->total == table->max) {
 239                 /* No free vlan entries */
 240                 err = -ENOSPC;
 241                 goto out;
 242         }
 243
 244         /* Register new MAC */
 245         table->refs[free] = 1;
 246         table->entries[free] = cpu_to_be32(vlan | MLX4_VLAN_VALID);
 247
 248         err = mlx4_set_port_vlan_table(dev, port, table->entries);
 249         if (unlikely(err)) {
 250                 mlx4_warn(dev, "Failed adding vlan: %u\n", vlan);
 251                 table->refs[free] = 0;
 252                 table->entries[free] = 0;
 253                 goto out;
 254         }
 255
 256         *index = free;
 257         ++table->total;
 258 out:
 259         mutex_unlock(&table->mutex);
 260         return err;
 261 }
 262 EXPORT_SYMBOL_GPL(mlx4_register_vlan);
 263
 264 void mlx4_unregister_vlan(struct mlx4_dev *dev, u8 port, int index)
 265 {
 266         struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;
 267
 268         if (index < MLX4_VLAN_REGULAR) {
 269                 mlx4_warn(dev, "Trying to free special vlan index %d\n", index);
 270                 return;
 271         }
 272
 273         mutex_lock(&table->mutex);
 274         if (!table->refs[index]) {
 275                 mlx4_warn(dev, "No vlan entry for index %d\n", index);
 276                 goto out;
 277         }
 278         if (--table->refs[index]) {
 279                 mlx4_dbg(dev, "Have more references for index %d,"
 280                          "no need to modify vlan table\n", index);
 281                 goto out;
 282         }
 283         table->entries[index] = 0;
 284         mlx4_set_port_vlan_table(dev, port, table->entries);
 285         --table->total;
 286 out:
 287         mutex_unlock(&table->mutex);
 288 }
 289 EXPORT_SYMBOL_GPL(mlx4_unregister_vlan);
 290
 291 int mlx4_get_port_ib_caps(struct mlx4_dev *dev, u8 port, __be32 *caps)
 292 {
 293         struct mlx4_cmd_mailbox *inmailbox, *outmailbox;
 294         u8 *inbuf, *outbuf;
 295         int err;
 296
 297         inmailbox = mlx4_alloc_cmd_mailbox(dev);
 298         if (IS_ERR(inmailbox))
 299                 return PTR_ERR(inmailbox);
 300
 301         outmailbox = mlx4_alloc_cmd_mailbox(dev);
 302         if (IS_ERR(outmailbox)) {
 303                 mlx4_free_cmd_mailbox(dev, inmailbox);
 304                 return PTR_ERR(outmailbox);
 305         }
 306
 307         inbuf = inmailbox->buf;
 308         outbuf = outmailbox->buf;
 309         memset(inbuf, 0, 256);
 310         memset(outbuf, 0, 256);
 311         inbuf[0] = 1;
 312         inbuf[1] = 1;
 313         inbuf[2] = 1;
 314         inbuf[3] = 1;
 315         *(__be16 *) (&inbuf[16]) = cpu_to_be16(0x0015);
 316         *(__be32 *) (&inbuf[20]) = cpu_to_be32(port);
 317
 318         err = mlx4_cmd_box(dev, inmailbox->dma, outmailbox->dma, port, 3,
 319                            MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C);
 320         if (!err)
 321                 *caps = *(__be32 *) (outbuf + 84);
 322         mlx4_free_cmd_mailbox(dev, inmailbox);
 323         mlx4_free_cmd_mailbox(dev, outmailbox);
 324         return err;
 325 }
 326
 327 int mlx4_SET_PORT(struct mlx4_dev *dev, u8 port)
 328 {
 329         struct mlx4_cmd_mailbox *mailbox;
 330         int err;
 331
 332         if (dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH)
 333                 return 0;
 334
 335         mailbox = mlx4_alloc_cmd_mailbox(dev);
 336         if (IS_ERR(mailbox))
 337                 return PTR_ERR(mailbox);
 338
 339         memset(mailbox->buf, 0, 256);
 340
 341         ((__be32 *) mailbox->buf)[1] = dev->caps.ib_port_def_cap[port];
 342         err = mlx4_cmd(dev, mailbox->dma, port, 0, MLX4_CMD_SET_PORT,
 343                        MLX4_CMD_TIME_CLASS_B);
 344
 345         mlx4_free_cmd_mailbox(dev, mailbox);
 346         return err;
 347 }