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