drivers/net/ethernet/mellanox/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 #include <linux/export.h>
  36
  37 #include <linux/mlx4/cmd.h>
  38
  39 #include "mlx4.h"
  40
  41 #define MLX4_MAC_VALID          (1ull << 63)
  42 #define MLX4_MAC_MASK           0xffffffffffffULL
  43
  44 #define MLX4_VLAN_VALID         (1u << 31)
  45 #define MLX4_VLAN_MASK          0xfff
  46
  47 void mlx4_init_mac_table(struct mlx4_dev *dev, struct mlx4_mac_table *table)
  48 {
  49         int i;
  50
  51         mutex_init(&table->mutex);
  52         for (i = 0; i < MLX4_MAX_MAC_NUM; i++) {
  53                 table->entries[i] = 0;
  54                 table->refs[i]   = 0;
  55         }
  56         table->max   = 1 << dev->caps.log_num_macs;
  57         table->total = 0;
  58 }
  59
  60 void mlx4_init_vlan_table(struct mlx4_dev *dev, struct mlx4_vlan_table *table)
  61 {
  62         int i;
  63
  64         mutex_init(&table->mutex);
  65         for (i = 0; i < MLX4_MAX_VLAN_NUM; i++) {
  66                 table->entries[i] = 0;
  67                 table->refs[i]   = 0;
  68         }
  69         table->max   = 1 << dev->caps.log_num_vlans;
  70         table->total = 0;
  71 }
  72
  73 static int mlx4_set_port_mac_table(struct mlx4_dev *dev, u8 port,
  74                                    __be64 *entries)
  75 {
  76         struct mlx4_cmd_mailbox *mailbox;
  77         u32 in_mod;
  78         int err;
  79
  80         mailbox = mlx4_alloc_cmd_mailbox(dev);
  81         if (IS_ERR(mailbox))
  82                 return PTR_ERR(mailbox);
  83
  84         memcpy(mailbox->buf, entries, MLX4_MAC_TABLE_SIZE);
  85
  86         in_mod = MLX4_SET_PORT_MAC_TABLE << 8 | port;
  87         err = mlx4_cmd(dev, mailbox->dma, in_mod, 1, MLX4_CMD_SET_PORT,
  88                        MLX4_CMD_TIME_CLASS_B);
  89
  90         mlx4_free_cmd_mailbox(dev, mailbox);
  91         return err;
  92 }
  93
  94 static int mlx4_uc_steer_add(struct mlx4_dev *dev, u8 port,
  95                              u64 mac, int *qpn, u8 reserve)
  96 {
  97         struct mlx4_qp qp;
  98         u8 gid[16] = {0};
  99         int err;
 100
 101         if (reserve) {
 102                 err = mlx4_qp_reserve_range(dev, 1, 1, qpn);
 103                 if (err) {
 104                         mlx4_err(dev, "Failed to reserve qp for mac registration\n");
 105                         return err;
 106                 }
 107         }
 108         qp.qpn = *qpn;
 109
 110         mac &= 0xffffffffffffULL;
 111         mac = cpu_to_be64(mac << 16);
 112         memcpy(&gid[10], &mac, ETH_ALEN);
 113         gid[5] = port;
 114         gid[7] = MLX4_UC_STEER << 1;
 115
 116         err = mlx4_qp_attach_common(dev, &qp, gid, 0,
 117                                     MLX4_PROT_ETH, MLX4_UC_STEER);
 118         if (err && reserve)
 119                 mlx4_qp_release_range(dev, *qpn, 1);
 120
 121         return err;
 122 }
 123
 124 static void mlx4_uc_steer_release(struct mlx4_dev *dev, u8 port,
 125                                   u64 mac, int qpn, u8 free)
 126 {
 127         struct mlx4_qp qp;
 128         u8 gid[16] = {0};
 129
 130         qp.qpn = qpn;
 131         mac &= 0xffffffffffffULL;
 132         mac = cpu_to_be64(mac << 16);
 133         memcpy(&gid[10], &mac, ETH_ALEN);
 134         gid[5] = port;
 135         gid[7] = MLX4_UC_STEER << 1;
 136
 137         mlx4_qp_detach_common(dev, &qp, gid, MLX4_PROT_ETH, MLX4_UC_STEER);
 138         if (free)
 139                 mlx4_qp_release_range(dev, qpn, 1);
 140 }
 141
 142 int mlx4_register_mac(struct mlx4_dev *dev, u8 port, u64 mac, int *qpn, u8 wrap)
 143 {
 144         struct mlx4_port_info *info = &mlx4_priv(dev)->port[port];
 145         struct mlx4_mac_table *table = &info->mac_table;
 146         struct mlx4_mac_entry *entry;
 147         int i, err = 0;
 148         int free = -1;
 149
 150         if (dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_UC_STEER) {
 151                 err = mlx4_uc_steer_add(dev, port, mac, qpn, 1);
 152                 if (!err) {
 153                         entry = kmalloc(sizeof *entry, GFP_KERNEL);
 154                         if (!entry) {
 155                                 mlx4_uc_steer_release(dev, port, mac, *qpn, 1);
 156                                 return -ENOMEM;
 157                         }
 158                         entry->mac = mac;
 159                         err = radix_tree_insert(&info->mac_tree, *qpn, entry);
 160                         if (err) {
 161                                 mlx4_uc_steer_release(dev, port, mac, *qpn, 1);
 162                                 return err;
 163                         }
 164                 } else
 165                         return err;
 166         }
 167         mlx4_dbg(dev, "Registering MAC: 0x%llx\n", (unsigned long long) mac);
 168         mutex_lock(&table->mutex);
 169         for (i = 0; i < MLX4_MAX_MAC_NUM - 1; i++) {
 170                 if (free < 0 && !table->refs[i]) {
 171                         free = i;
 172                         continue;
 173                 }
 174
 175                 if (mac == (MLX4_MAC_MASK & be64_to_cpu(table->entries[i]))) {
 176                         /* MAC already registered, increase references count */
 177                         ++table->refs[i];
 178                         goto out;
 179                 }
 180         }
 181
 182         if (free < 0) {
 183                 err = -ENOMEM;
 184                 goto out;
 185         }
 186
 187         mlx4_dbg(dev, "Free MAC index is %d\n", free);
 188
 189         if (table->total == table->max) {
 190                 /* No free mac entries */
 191                 err = -ENOSPC;
 192                 goto out;
 193         }
 194
 195         /* Register new MAC */
 196         table->refs[free] = 1;
 197         table->entries[free] = cpu_to_be64(mac | MLX4_MAC_VALID);
 198
 199         err = mlx4_set_port_mac_table(dev, port, table->entries);
 200         if (unlikely(err)) {
 201                 mlx4_err(dev, "Failed adding MAC: 0x%llx\n", (unsigned long long) mac);
 202                 table->refs[free] = 0;
 203                 table->entries[free] = 0;
 204                 goto out;
 205         }
 206
 207         if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_UC_STEER))
 208                 *qpn = info->base_qpn + free;
 209         ++table->total;
 210 out:
 211         mutex_unlock(&table->mutex);
 212         return err;
 213 }
 214 EXPORT_SYMBOL_GPL(mlx4_register_mac);
 215
 216 static int validate_index(struct mlx4_dev *dev,
 217                           struct mlx4_mac_table *table, int index)
 218 {
 219         int err = 0;
 220
 221         if (index < 0 || index >= table->max || !table->entries[index]) {
 222                 mlx4_warn(dev, "No valid Mac entry for the given index\n");
 223                 err = -EINVAL;
 224         }
 225         return err;
 226 }
 227
 228 static int find_index(struct mlx4_dev *dev,
 229                       struct mlx4_mac_table *table, u64 mac)
 230 {
 231         int i;
 232         for (i = 0; i < MLX4_MAX_MAC_NUM; i++) {
 233                 if (mac == (MLX4_MAC_MASK & be64_to_cpu(table->entries[i])))
 234                         return i;
 235         }
 236         /* Mac not found */
 237         return -EINVAL;
 238 }
 239
 240 void mlx4_unregister_mac(struct mlx4_dev *dev, u8 port, int qpn)
 241 {
 242         struct mlx4_port_info *info = &mlx4_priv(dev)->port[port];
 243         struct mlx4_mac_table *table = &info->mac_table;
 244         int index = qpn - info->base_qpn;
 245         struct mlx4_mac_entry *entry;
 246
 247         if (dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_UC_STEER) {
 248                 entry = radix_tree_lookup(&info->mac_tree, qpn);
 249                 if (entry) {
 250                         mlx4_uc_steer_release(dev, port, entry->mac, qpn, 1);
 251                         radix_tree_delete(&info->mac_tree, qpn);
 252                         index = find_index(dev, table, entry->mac);
 253                         kfree(entry);
 254                 }
 255         }
 256
 257         mutex_lock(&table->mutex);
 258
 259         if (validate_index(dev, table, index))
 260                 goto out;
 261
 262         /* Check whether this address has reference count */
 263         if (!(--table->refs[index])) {
 264                 table->entries[index] = 0;
 265                 mlx4_set_port_mac_table(dev, port, table->entries);
 266                 --table->total;
 267         }
 268 out:
 269         mutex_unlock(&table->mutex);
 270 }
 271 EXPORT_SYMBOL_GPL(mlx4_unregister_mac);
 272
 273 int mlx4_replace_mac(struct mlx4_dev *dev, u8 port, int qpn, u64 new_mac, u8 wrap)
 274 {
 275         struct mlx4_port_info *info = &mlx4_priv(dev)->port[port];
 276         struct mlx4_mac_table *table = &info->mac_table;
 277         int index = qpn - info->base_qpn;
 278         struct mlx4_mac_entry *entry;
 279         int err;
 280
 281         if (dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_UC_STEER) {
 282                 entry = radix_tree_lookup(&info->mac_tree, qpn);
 283                 if (!entry)
 284                         return -EINVAL;
 285                 index = find_index(dev, table, entry->mac);
 286                 mlx4_uc_steer_release(dev, port, entry->mac, qpn, 0);
 287                 entry->mac = new_mac;
 288                 err = mlx4_uc_steer_add(dev, port, entry->mac, &qpn, 0);
 289                 if (err || index < 0)
 290                         return err;
 291         }
 292
 293         mutex_lock(&table->mutex);
 294
 295         err = validate_index(dev, table, index);
 296         if (err)
 297                 goto out;
 298
 299         table->entries[index] = cpu_to_be64(new_mac | MLX4_MAC_VALID);
 300
 301         err = mlx4_set_port_mac_table(dev, port, table->entries);
 302         if (unlikely(err)) {
 303                 mlx4_err(dev, "Failed adding MAC: 0x%llx\n", (unsigned long long) new_mac);
 304                 table->entries[index] = 0;
 305         }
 306 out:
 307         mutex_unlock(&table->mutex);
 308         return err;
 309 }
 310 EXPORT_SYMBOL_GPL(mlx4_replace_mac);
 311 static int mlx4_set_port_vlan_table(struct mlx4_dev *dev, u8 port,
 312                                     __be32 *entries)
 313 {
 314         struct mlx4_cmd_mailbox *mailbox;
 315         u32 in_mod;
 316         int err;
 317
 318         mailbox = mlx4_alloc_cmd_mailbox(dev);
 319         if (IS_ERR(mailbox))
 320                 return PTR_ERR(mailbox);
 321
 322         memcpy(mailbox->buf, entries, MLX4_VLAN_TABLE_SIZE);
 323         in_mod = MLX4_SET_PORT_VLAN_TABLE << 8 | port;
 324         err = mlx4_cmd(dev, mailbox->dma, in_mod, 1, MLX4_CMD_SET_PORT,
 325                        MLX4_CMD_TIME_CLASS_B);
 326
 327         mlx4_free_cmd_mailbox(dev, mailbox);
 328
 329         return err;
 330 }
 331
 332 int mlx4_find_cached_vlan(struct mlx4_dev *dev, u8 port, u16 vid, int *idx)
 333 {
 334         struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;
 335         int i;
 336
 337         for (i = 0; i < MLX4_MAX_VLAN_NUM; ++i) {
 338                 if (table->refs[i] &&
 339                     (vid == (MLX4_VLAN_MASK &
 340                               be32_to_cpu(table->entries[i])))) {
 341                         /* VLAN already registered, increase reference count */
 342                         *idx = i;
 343                         return 0;
 344                 }
 345         }
 346
 347         return -ENOENT;
 348 }
 349 EXPORT_SYMBOL_GPL(mlx4_find_cached_vlan);
 350
 351 int mlx4_register_vlan(struct mlx4_dev *dev, u8 port, u16 vlan, int *index)
 352 {
 353         struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;
 354         int i, err = 0;
 355         int free = -1;
 356
 357         mutex_lock(&table->mutex);
 358         for (i = MLX4_VLAN_REGULAR; i < MLX4_MAX_VLAN_NUM; i++) {
 359                 if (free < 0 && (table->refs[i] == 0)) {
 360                         free = i;
 361                         continue;
 362                 }
 363
 364                 if (table->refs[i] &&
 365                     (vlan == (MLX4_VLAN_MASK &
 366                               be32_to_cpu(table->entries[i])))) {
 367                         /* Vlan already registered, increase references count */
 368                         *index = i;
 369                         ++table->refs[i];
 370                         goto out;
 371                 }
 372         }
 373
 374         if (free < 0) {
 375                 err = -ENOMEM;
 376                 goto out;
 377         }
 378
 379         if (table->total == table->max) {
 380                 /* No free vlan entries */
 381                 err = -ENOSPC;
 382                 goto out;
 383         }
 384
 385         /* Register new MAC */
 386         table->refs[free] = 1;
 387         table->entries[free] = cpu_to_be32(vlan | MLX4_VLAN_VALID);
 388
 389         err = mlx4_set_port_vlan_table(dev, port, table->entries);
 390         if (unlikely(err)) {
 391                 mlx4_warn(dev, "Failed adding vlan: %u\n", vlan);
 392                 table->refs[free] = 0;
 393                 table->entries[free] = 0;
 394                 goto out;
 395         }
 396
 397         *index = free;
 398         ++table->total;
 399 out:
 400         mutex_unlock(&table->mutex);
 401         return err;
 402 }
 403 EXPORT_SYMBOL_GPL(mlx4_register_vlan);
 404
 405 void mlx4_unregister_vlan(struct mlx4_dev *dev, u8 port, int index)
 406 {
 407         struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;
 408
 409         if (index < MLX4_VLAN_REGULAR) {
 410                 mlx4_warn(dev, "Trying to free special vlan index %d\n", index);
 411                 return;
 412         }
 413
 414         mutex_lock(&table->mutex);
 415         if (!table->refs[index]) {
 416                 mlx4_warn(dev, "No vlan entry for index %d\n", index);
 417                 goto out;
 418         }
 419         if (--table->refs[index]) {
 420                 mlx4_dbg(dev, "Have more references for index %d,"
 421                          "no need to modify vlan table\n", index);
 422                 goto out;
 423         }
 424         table->entries[index] = 0;
 425         mlx4_set_port_vlan_table(dev, port, table->entries);
 426         --table->total;
 427 out:
 428         mutex_unlock(&table->mutex);
 429 }
 430 EXPORT_SYMBOL_GPL(mlx4_unregister_vlan);
 431
 432 int mlx4_get_port_ib_caps(struct mlx4_dev *dev, u8 port, __be32 *caps)
 433 {
 434         struct mlx4_cmd_mailbox *inmailbox, *outmailbox;
 435         u8 *inbuf, *outbuf;
 436         int err;
 437
 438         inmailbox = mlx4_alloc_cmd_mailbox(dev);
 439         if (IS_ERR(inmailbox))
 440                 return PTR_ERR(inmailbox);
 441
 442         outmailbox = mlx4_alloc_cmd_mailbox(dev);
 443         if (IS_ERR(outmailbox)) {
 444                 mlx4_free_cmd_mailbox(dev, inmailbox);
 445                 return PTR_ERR(outmailbox);
 446         }
 447
 448         inbuf = inmailbox->buf;
 449         outbuf = outmailbox->buf;
 450         memset(inbuf, 0, 256);
 451         memset(outbuf, 0, 256);
 452         inbuf[0] = 1;
 453         inbuf[1] = 1;
 454         inbuf[2] = 1;
 455         inbuf[3] = 1;
 456         *(__be16 *) (&inbuf[16]) = cpu_to_be16(0x0015);
 457         *(__be32 *) (&inbuf[20]) = cpu_to_be32(port);
 458
 459         err = mlx4_cmd_box(dev, inmailbox->dma, outmailbox->dma, port, 3,
 460                            MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C);
 461         if (!err)
 462                 *caps = *(__be32 *) (outbuf + 84);
 463         mlx4_free_cmd_mailbox(dev, inmailbox);
 464         mlx4_free_cmd_mailbox(dev, outmailbox);
 465         return err;
 466 }
 467
 468 int mlx4_SET_PORT(struct mlx4_dev *dev, u8 port)
 469 {
 470         struct mlx4_cmd_mailbox *mailbox;
 471         int err;
 472
 473         if (dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH)
 474                 return 0;
 475
 476         mailbox = mlx4_alloc_cmd_mailbox(dev);
 477         if (IS_ERR(mailbox))
 478                 return PTR_ERR(mailbox);
 479
 480         memset(mailbox->buf, 0, 256);
 481
 482         ((__be32 *) mailbox->buf)[1] = dev->caps.ib_port_def_cap[port];
 483         err = mlx4_cmd(dev, mailbox->dma, port, 0, MLX4_CMD_SET_PORT,
 484                        MLX4_CMD_TIME_CLASS_B);
 485
 486         mlx4_free_cmd_mailbox(dev, mailbox);
 487         return err;
 488 }