drivers/infiniband/core/sysfs.c

   1 /*
   2  * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
   3  * Copyright (c) 2005 Mellanox Technologies Ltd.  All rights reserved.
   4  * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
   5  *
   6  * This software is available to you under a choice of one of two
   7  * licenses.  You may choose to be licensed under the terms of the GNU
   8  * General Public License (GPL) Version 2, available from the file
   9  * COPYING in the main directory of this source tree, or the
  10  * OpenIB.org BSD license below:
  11  *
  12  *     Redistribution and use in source and binary forms, with or
  13  *     without modification, are permitted provided that the following
  14  *     conditions are met:
  15  *
  16  *      - Redistributions of source code must retain the above
  17  *        copyright notice, this list of conditions and the following
  18  *        disclaimer.
  19  *
  20  *      - Redistributions in binary form must reproduce the above
  21  *        copyright notice, this list of conditions and the following
  22  *        disclaimer in the documentation and/or other materials
  23  *        provided with the distribution.
  24  *
  25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  29  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  30  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  31  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  32  * SOFTWARE.
  33  *
  34  * $Id: sysfs.c 1349 2004-12-16 21:09:43Z roland $
  35  */
  36
  37 #include "core_priv.h"
  38
  39 #include <linux/slab.h>
  40 #include <linux/string.h>
  41
  42 #include <rdma/ib_mad.h>
  43
  44 struct ib_port {
  45         struct kobject         kobj;
  46         struct ib_device      *ibdev;
  47         struct attribute_group gid_group;
  48         struct attribute_group pkey_group;
  49         u8                     port_num;
  50 };
  51
  52 struct port_attribute {
  53         struct attribute attr;
  54         ssize_t (*show)(struct ib_port *, struct port_attribute *, char *buf);
  55         ssize_t (*store)(struct ib_port *, struct port_attribute *,
  56                          const char *buf, size_t count);
  57 };
  58
  59 #define PORT_ATTR(_name, _mode, _show, _store) \
  60 struct port_attribute port_attr_##_name = __ATTR(_name, _mode, _show, _store)
  61
  62 #define PORT_ATTR_RO(_name) \
  63 struct port_attribute port_attr_##_name = __ATTR_RO(_name)
  64
  65 struct port_table_attribute {
  66         struct port_attribute   attr;
  67         char                    name[8];
  68         int                     index;
  69 };
  70
  71 static inline int ibdev_is_alive(const struct ib_device *dev)
  72 {
  73         return dev->reg_state == IB_DEV_REGISTERED;
  74 }
  75
  76 static ssize_t port_attr_show(struct kobject *kobj,
  77                               struct attribute *attr, char *buf)
  78 {
  79         struct port_attribute *port_attr =
  80                 container_of(attr, struct port_attribute, attr);
  81         struct ib_port *p = container_of(kobj, struct ib_port, kobj);
  82
  83         if (!port_attr->show)
  84                 return -EIO;
  85         if (!ibdev_is_alive(p->ibdev))
  86                 return -ENODEV;
  87
  88         return port_attr->show(p, port_attr, buf);
  89 }
  90
  91 static struct sysfs_ops port_sysfs_ops = {
  92         .show = port_attr_show
  93 };
  94
  95 static ssize_t state_show(struct ib_port *p, struct port_attribute *unused,
  96                           char *buf)
  97 {
  98         struct ib_port_attr attr;
  99         ssize_t ret;
 100
 101         static const char *state_name[] = {
 102                 [IB_PORT_NOP]           = "NOP",
 103                 [IB_PORT_DOWN]          = "DOWN",
 104                 [IB_PORT_INIT]          = "INIT",
 105                 [IB_PORT_ARMED]         = "ARMED",
 106                 [IB_PORT_ACTIVE]        = "ACTIVE",
 107                 [IB_PORT_ACTIVE_DEFER]  = "ACTIVE_DEFER"
 108         };
 109
 110         ret = ib_query_port(p->ibdev, p->port_num, &attr);
 111         if (ret)
 112                 return ret;
 113
 114         return sprintf(buf, "%d: %s\n", attr.state,
 115                        attr.state >= 0 && attr.state < ARRAY_SIZE(state_name) ?
 116                        state_name[attr.state] : "UNKNOWN");
 117 }
 118
 119 static ssize_t lid_show(struct ib_port *p, struct port_attribute *unused,
 120                         char *buf)
 121 {
 122         struct ib_port_attr attr;
 123         ssize_t ret;
 124
 125         ret = ib_query_port(p->ibdev, p->port_num, &attr);
 126         if (ret)
 127                 return ret;
 128
 129         return sprintf(buf, "0x%x\n", attr.lid);
 130 }
 131
 132 static ssize_t lid_mask_count_show(struct ib_port *p,
 133                                    struct port_attribute *unused,
 134                                    char *buf)
 135 {
 136         struct ib_port_attr attr;
 137         ssize_t ret;
 138
 139         ret = ib_query_port(p->ibdev, p->port_num, &attr);
 140         if (ret)
 141                 return ret;
 142
 143         return sprintf(buf, "%d\n", attr.lmc);
 144 }
 145
 146 static ssize_t sm_lid_show(struct ib_port *p, struct port_attribute *unused,
 147                            char *buf)
 148 {
 149         struct ib_port_attr attr;
 150         ssize_t ret;
 151
 152         ret = ib_query_port(p->ibdev, p->port_num, &attr);
 153         if (ret)
 154                 return ret;
 155
 156         return sprintf(buf, "0x%x\n", attr.sm_lid);
 157 }
 158
 159 static ssize_t sm_sl_show(struct ib_port *p, struct port_attribute *unused,
 160                           char *buf)
 161 {
 162         struct ib_port_attr attr;
 163         ssize_t ret;
 164
 165         ret = ib_query_port(p->ibdev, p->port_num, &attr);
 166         if (ret)
 167                 return ret;
 168
 169         return sprintf(buf, "%d\n", attr.sm_sl);
 170 }
 171
 172 static ssize_t cap_mask_show(struct ib_port *p, struct port_attribute *unused,
 173                              char *buf)
 174 {
 175         struct ib_port_attr attr;
 176         ssize_t ret;
 177
 178         ret = ib_query_port(p->ibdev, p->port_num, &attr);
 179         if (ret)
 180                 return ret;
 181
 182         return sprintf(buf, "0x%08x\n", attr.port_cap_flags);
 183 }
 184
 185 static ssize_t rate_show(struct ib_port *p, struct port_attribute *unused,
 186                          char *buf)
 187 {
 188         struct ib_port_attr attr;
 189         char *speed = "";
 190         int rate;
 191         ssize_t ret;
 192
 193         ret = ib_query_port(p->ibdev, p->port_num, &attr);
 194         if (ret)
 195                 return ret;
 196
 197         switch (attr.active_speed) {
 198         case 2: speed = " DDR"; break;
 199         case 4: speed = " QDR"; break;
 200         }
 201
 202         rate = 25 * ib_width_enum_to_int(attr.active_width) * attr.active_speed;
 203         if (rate < 0)
 204                 return -EINVAL;
 205
 206         return sprintf(buf, "%d%s Gb/sec (%dX%s)\n",
 207                        rate / 10, rate % 10 ? ".5" : "",
 208                        ib_width_enum_to_int(attr.active_width), speed);
 209 }
 210
 211 static ssize_t phys_state_show(struct ib_port *p, struct port_attribute *unused,
 212                                char *buf)
 213 {
 214         struct ib_port_attr attr;
 215
 216         ssize_t ret;
 217
 218         ret = ib_query_port(p->ibdev, p->port_num, &attr);
 219         if (ret)
 220                 return ret;
 221
 222         switch (attr.phys_state) {
 223         case 1:  return sprintf(buf, "1: Sleep\n");
 224         case 2:  return sprintf(buf, "2: Polling\n");
 225         case 3:  return sprintf(buf, "3: Disabled\n");
 226         case 4:  return sprintf(buf, "4: PortConfigurationTraining\n");
 227         case 5:  return sprintf(buf, "5: LinkUp\n");
 228         case 6:  return sprintf(buf, "6: LinkErrorRecovery\n");
 229         case 7:  return sprintf(buf, "7: Phy Test\n");
 230         default: return sprintf(buf, "%d: <unknown>\n", attr.phys_state);
 231         }
 232 }
 233
 234 static PORT_ATTR_RO(state);
 235 static PORT_ATTR_RO(lid);
 236 static PORT_ATTR_RO(lid_mask_count);
 237 static PORT_ATTR_RO(sm_lid);
 238 static PORT_ATTR_RO(sm_sl);
 239 static PORT_ATTR_RO(cap_mask);
 240 static PORT_ATTR_RO(rate);
 241 static PORT_ATTR_RO(phys_state);
 242
 243 static struct attribute *port_default_attrs[] = {
 244         &port_attr_state.attr,
 245         &port_attr_lid.attr,
 246         &port_attr_lid_mask_count.attr,
 247         &port_attr_sm_lid.attr,
 248         &port_attr_sm_sl.attr,
 249         &port_attr_cap_mask.attr,
 250         &port_attr_rate.attr,
 251         &port_attr_phys_state.attr,
 252         NULL
 253 };
 254
 255 static ssize_t show_port_gid(struct ib_port *p, struct port_attribute *attr,
 256                              char *buf)
 257 {
 258         struct port_table_attribute *tab_attr =
 259                 container_of(attr, struct port_table_attribute, attr);
 260         union ib_gid gid;
 261         ssize_t ret;
 262
 263         ret = ib_query_gid(p->ibdev, p->port_num, tab_attr->index, &gid);
 264         if (ret)
 265                 return ret;
 266
 267         return sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n",
 268                        be16_to_cpu(((__be16 *) gid.raw)[0]),
 269                        be16_to_cpu(((__be16 *) gid.raw)[1]),
 270                        be16_to_cpu(((__be16 *) gid.raw)[2]),
 271                        be16_to_cpu(((__be16 *) gid.raw)[3]),
 272                        be16_to_cpu(((__be16 *) gid.raw)[4]),
 273                        be16_to_cpu(((__be16 *) gid.raw)[5]),
 274                        be16_to_cpu(((__be16 *) gid.raw)[6]),
 275                        be16_to_cpu(((__be16 *) gid.raw)[7]));
 276 }
 277
 278 static ssize_t show_port_pkey(struct ib_port *p, struct port_attribute *attr,
 279                               char *buf)
 280 {
 281         struct port_table_attribute *tab_attr =
 282                 container_of(attr, struct port_table_attribute, attr);
 283         u16 pkey;
 284         ssize_t ret;
 285
 286         ret = ib_query_pkey(p->ibdev, p->port_num, tab_attr->index, &pkey);
 287         if (ret)
 288                 return ret;
 289
 290         return sprintf(buf, "0x%04x\n", pkey);
 291 }
 292
 293 #define PORT_PMA_ATTR(_name, _counter, _width, _offset)                 \
 294 struct port_table_attribute port_pma_attr_##_name = {                   \
 295         .attr  = __ATTR(_name, S_IRUGO, show_pma_counter, NULL),        \
 296         .index = (_offset) | ((_width) << 16) | ((_counter) << 24)      \
 297 }
 298
 299 static ssize_t show_pma_counter(struct ib_port *p, struct port_attribute *attr,
 300                                 char *buf)
 301 {
 302         struct port_table_attribute *tab_attr =
 303                 container_of(attr, struct port_table_attribute, attr);
 304         int offset = tab_attr->index & 0xffff;
 305         int width  = (tab_attr->index >> 16) & 0xff;
 306         struct ib_mad *in_mad  = NULL;
 307         struct ib_mad *out_mad = NULL;
 308         ssize_t ret;
 309
 310         if (!p->ibdev->process_mad)
 311                 return sprintf(buf, "N/A (no PMA)\n");
 312
 313         in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
 314         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 315         if (!in_mad || !out_mad) {
 316                 ret = -ENOMEM;
 317                 goto out;
 318         }
 319
 320         in_mad->mad_hdr.base_version  = 1;
 321         in_mad->mad_hdr.mgmt_class    = IB_MGMT_CLASS_PERF_MGMT;
 322         in_mad->mad_hdr.class_version = 1;
 323         in_mad->mad_hdr.method        = IB_MGMT_METHOD_GET;
 324         in_mad->mad_hdr.attr_id       = cpu_to_be16(0x12); /* PortCounters */
 325
 326         in_mad->data[41] = p->port_num; /* PortSelect field */
 327
 328         if ((p->ibdev->process_mad(p->ibdev, IB_MAD_IGNORE_MKEY,
 329                  p->port_num, NULL, NULL, in_mad, out_mad) &
 330              (IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY)) !=
 331             (IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY)) {
 332                 ret = -EINVAL;
 333                 goto out;
 334         }
 335
 336         switch (width) {
 337         case 4:
 338                 ret = sprintf(buf, "%u\n", (out_mad->data[40 + offset / 8] >>
 339                                             (4 - (offset % 8))) & 0xf);
 340                 break;
 341         case 8:
 342                 ret = sprintf(buf, "%u\n", out_mad->data[40 + offset / 8]);
 343                 break;
 344         case 16:
 345                 ret = sprintf(buf, "%u\n",
 346                               be16_to_cpup((__be16 *)(out_mad->data + 40 + offset / 8)));
 347                 break;
 348         case 32:
 349                 ret = sprintf(buf, "%u\n",
 350                               be32_to_cpup((__be32 *)(out_mad->data + 40 + offset / 8)));
 351                 break;
 352         default:
 353                 ret = 0;
 354         }
 355
 356 out:
 357         kfree(in_mad);
 358         kfree(out_mad);
 359
 360         return ret;
 361 }
 362
 363 static PORT_PMA_ATTR(symbol_error                   ,  0, 16,  32);
 364 static PORT_PMA_ATTR(link_error_recovery            ,  1,  8,  48);
 365 static PORT_PMA_ATTR(link_downed                    ,  2,  8,  56);
 366 static PORT_PMA_ATTR(port_rcv_errors                ,  3, 16,  64);
 367 static PORT_PMA_ATTR(port_rcv_remote_physical_errors,  4, 16,  80);
 368 static PORT_PMA_ATTR(port_rcv_switch_relay_errors   ,  5, 16,  96);
 369 static PORT_PMA_ATTR(port_xmit_discards             ,  6, 16, 112);
 370 static PORT_PMA_ATTR(port_xmit_constraint_errors    ,  7,  8, 128);
 371 static PORT_PMA_ATTR(port_rcv_constraint_errors     ,  8,  8, 136);
 372 static PORT_PMA_ATTR(local_link_integrity_errors    ,  9,  4, 152);
 373 static PORT_PMA_ATTR(excessive_buffer_overrun_errors, 10,  4, 156);
 374 static PORT_PMA_ATTR(VL15_dropped                   , 11, 16, 176);
 375 static PORT_PMA_ATTR(port_xmit_data                 , 12, 32, 192);
 376 static PORT_PMA_ATTR(port_rcv_data                  , 13, 32, 224);
 377 static PORT_PMA_ATTR(port_xmit_packets              , 14, 32, 256);
 378 static PORT_PMA_ATTR(port_rcv_packets               , 15, 32, 288);
 379
 380 static struct attribute *pma_attrs[] = {
 381         &port_pma_attr_symbol_error.attr.attr,
 382         &port_pma_attr_link_error_recovery.attr.attr,
 383         &port_pma_attr_link_downed.attr.attr,
 384         &port_pma_attr_port_rcv_errors.attr.attr,
 385         &port_pma_attr_port_rcv_remote_physical_errors.attr.attr,
 386         &port_pma_attr_port_rcv_switch_relay_errors.attr.attr,
 387         &port_pma_attr_port_xmit_discards.attr.attr,
 388         &port_pma_attr_port_xmit_constraint_errors.attr.attr,
 389         &port_pma_attr_port_rcv_constraint_errors.attr.attr,
 390         &port_pma_attr_local_link_integrity_errors.attr.attr,
 391         &port_pma_attr_excessive_buffer_overrun_errors.attr.attr,
 392         &port_pma_attr_VL15_dropped.attr.attr,
 393         &port_pma_attr_port_xmit_data.attr.attr,
 394         &port_pma_attr_port_rcv_data.attr.attr,
 395         &port_pma_attr_port_xmit_packets.attr.attr,
 396         &port_pma_attr_port_rcv_packets.attr.attr,
 397         NULL
 398 };
 399
 400 static struct attribute_group pma_group = {
 401         .name  = "counters",
 402         .attrs  = pma_attrs
 403 };
 404
 405 static void ib_port_release(struct kobject *kobj)
 406 {
 407         struct ib_port *p = container_of(kobj, struct ib_port, kobj);
 408         struct attribute *a;
 409         int i;
 410
 411         for (i = 0; (a = p->gid_group.attrs[i]); ++i)
 412                 kfree(a);
 413
 414         kfree(p->gid_group.attrs);
 415
 416         for (i = 0; (a = p->pkey_group.attrs[i]); ++i)
 417                 kfree(a);
 418
 419         kfree(p->pkey_group.attrs);
 420
 421         kfree(p);
 422 }
 423
 424 static struct kobj_type port_type = {
 425         .release       = ib_port_release,
 426         .sysfs_ops     = &port_sysfs_ops,
 427         .default_attrs = port_default_attrs
 428 };
 429
 430 static void ib_device_release(struct class_device *cdev)
 431 {
 432         struct ib_device *dev = container_of(cdev, struct ib_device, class_dev);
 433
 434         kfree(dev);
 435 }
 436
 437 static int ib_device_uevent(struct class_device *cdev,
 438                             struct kobj_uevent_env *env)
 439 {
 440         struct ib_device *dev = container_of(cdev, struct ib_device, class_dev);
 441
 442         if (add_uevent_var(env, "NAME=%s", dev->name))
 443                 return -ENOMEM;
 444
 445         /*
 446          * It would be nice to pass the node GUID with the event...
 447          */
 448
 449         return 0;
 450 }
 451
 452 static struct attribute **
 453 alloc_group_attrs(ssize_t (*show)(struct ib_port *,
 454                                   struct port_attribute *, char *buf),
 455                   int len)
 456 {
 457         struct attribute **tab_attr;
 458         struct port_table_attribute *element;
 459         int i;
 460
 461         tab_attr = kcalloc(1 + len, sizeof(struct attribute *), GFP_KERNEL);
 462         if (!tab_attr)
 463                 return NULL;
 464
 465         for (i = 0; i < len; i++) {
 466                 element = kzalloc(sizeof(struct port_table_attribute),
 467                                   GFP_KERNEL);
 468                 if (!element)
 469                         goto err;
 470
 471                 if (snprintf(element->name, sizeof(element->name),
 472                              "%d", i) >= sizeof(element->name)) {
 473                         kfree(element);
 474                         goto err;
 475                 }
 476
 477                 element->attr.attr.name  = element->name;
 478                 element->attr.attr.mode  = S_IRUGO;
 479                 element->attr.show       = show;
 480                 element->index           = i;
 481
 482                 tab_attr[i] = &element->attr.attr;
 483         }
 484
 485         return tab_attr;
 486
 487 err:
 488         while (--i >= 0)
 489                 kfree(tab_attr[i]);
 490         kfree(tab_attr);
 491         return NULL;
 492 }
 493
 494 static int add_port(struct ib_device *device, int port_num)
 495 {
 496         struct ib_port *p;
 497         struct ib_port_attr attr;
 498         int i;
 499         int ret;
 500
 501         ret = ib_query_port(device, port_num, &attr);
 502         if (ret)
 503                 return ret;
 504
 505         p = kzalloc(sizeof *p, GFP_KERNEL);
 506         if (!p)
 507                 return -ENOMEM;
 508
 509         p->ibdev      = device;
 510         p->port_num   = port_num;
 511
 512         ret = kobject_init_and_add(&p->kobj, &port_type,
 513                                    kobject_get(device->ports_parent),
 514                                    "%d", port_num);
 515         if (ret)
 516                 goto err_put;
 517
 518         ret = sysfs_create_group(&p->kobj, &pma_group);
 519         if (ret)
 520                 goto err_put;
 521
 522         p->gid_group.name  = "gids";
 523         p->gid_group.attrs = alloc_group_attrs(show_port_gid, attr.gid_tbl_len);
 524         if (!p->gid_group.attrs)
 525                 goto err_remove_pma;
 526
 527         ret = sysfs_create_group(&p->kobj, &p->gid_group);
 528         if (ret)
 529                 goto err_free_gid;
 530
 531         p->pkey_group.name  = "pkeys";
 532         p->pkey_group.attrs = alloc_group_attrs(show_port_pkey,
 533                                                 attr.pkey_tbl_len);
 534         if (!p->pkey_group.attrs)
 535                 goto err_remove_gid;
 536
 537         ret = sysfs_create_group(&p->kobj, &p->pkey_group);
 538         if (ret)
 539                 goto err_free_pkey;
 540
 541         list_add_tail(&p->kobj.entry, &device->port_list);
 542
 543         kobject_uevent(&p->kobj, KOBJ_ADD);
 544         return 0;
 545
 546 err_free_pkey:
 547         for (i = 0; i < attr.pkey_tbl_len; ++i)
 548                 kfree(p->pkey_group.attrs[i]);
 549
 550         kfree(p->pkey_group.attrs);
 551
 552 err_remove_gid:
 553         sysfs_remove_group(&p->kobj, &p->gid_group);
 554
 555 err_free_gid:
 556         for (i = 0; i < attr.gid_tbl_len; ++i)
 557                 kfree(p->gid_group.attrs[i]);
 558
 559         kfree(p->gid_group.attrs);
 560
 561 err_remove_pma:
 562         sysfs_remove_group(&p->kobj, &pma_group);
 563
 564 err_put:
 565         kobject_put(device->ports_parent);
 566         kfree(p);
 567         return ret;
 568 }
 569
 570 static ssize_t show_node_type(struct class_device *cdev, char *buf)
 571 {
 572         struct ib_device *dev = container_of(cdev, struct ib_device, class_dev);
 573
 574         if (!ibdev_is_alive(dev))
 575                 return -ENODEV;
 576
 577         switch (dev->node_type) {
 578         case RDMA_NODE_IB_CA:     return sprintf(buf, "%d: CA\n", dev->node_type);
 579         case RDMA_NODE_RNIC:      return sprintf(buf, "%d: RNIC\n", dev->node_type);
 580         case RDMA_NODE_IB_SWITCH: return sprintf(buf, "%d: switch\n", dev->node_type);
 581         case RDMA_NODE_IB_ROUTER: return sprintf(buf, "%d: router\n", dev->node_type);
 582         default:                  return sprintf(buf, "%d: <unknown>\n", dev->node_type);
 583         }
 584 }
 585
 586 static ssize_t show_sys_image_guid(struct class_device *cdev, char *buf)
 587 {
 588         struct ib_device *dev = container_of(cdev, struct ib_device, class_dev);
 589         struct ib_device_attr attr;
 590         ssize_t ret;
 591
 592         if (!ibdev_is_alive(dev))
 593                 return -ENODEV;
 594
 595         ret = ib_query_device(dev, &attr);
 596         if (ret)
 597                 return ret;
 598
 599         return sprintf(buf, "%04x:%04x:%04x:%04x\n",
 600                        be16_to_cpu(((__be16 *) &attr.sys_image_guid)[0]),
 601                        be16_to_cpu(((__be16 *) &attr.sys_image_guid)[1]),
 602                        be16_to_cpu(((__be16 *) &attr.sys_image_guid)[2]),
 603                        be16_to_cpu(((__be16 *) &attr.sys_image_guid)[3]));
 604 }
 605
 606 static ssize_t show_node_guid(struct class_device *cdev, char *buf)
 607 {
 608         struct ib_device *dev = container_of(cdev, struct ib_device, class_dev);
 609
 610         if (!ibdev_is_alive(dev))
 611                 return -ENODEV;
 612
 613         return sprintf(buf, "%04x:%04x:%04x:%04x\n",
 614                        be16_to_cpu(((__be16 *) &dev->node_guid)[0]),
 615                        be16_to_cpu(((__be16 *) &dev->node_guid)[1]),
 616                        be16_to_cpu(((__be16 *) &dev->node_guid)[2]),
 617                        be16_to_cpu(((__be16 *) &dev->node_guid)[3]));
 618 }
 619
 620 static ssize_t show_node_desc(struct class_device *cdev, char *buf)
 621 {
 622         struct ib_device *dev = container_of(cdev, struct ib_device, class_dev);
 623
 624         return sprintf(buf, "%.64s\n", dev->node_desc);
 625 }
 626
 627 static ssize_t set_node_desc(struct class_device *cdev, const char *buf,
 628                               size_t count)
 629 {
 630         struct ib_device *dev = container_of(cdev, struct ib_device, class_dev);
 631         struct ib_device_modify desc = {};
 632         int ret;
 633
 634         if (!dev->modify_device)
 635                 return -EIO;
 636
 637         memcpy(desc.node_desc, buf, min_t(int, count, 64));
 638         ret = ib_modify_device(dev, IB_DEVICE_MODIFY_NODE_DESC, &desc);
 639         if (ret)
 640                 return ret;
 641
 642         return count;
 643 }
 644
 645 static CLASS_DEVICE_ATTR(node_type, S_IRUGO, show_node_type, NULL);
 646 static CLASS_DEVICE_ATTR(sys_image_guid, S_IRUGO, show_sys_image_guid, NULL);
 647 static CLASS_DEVICE_ATTR(node_guid, S_IRUGO, show_node_guid, NULL);
 648 static CLASS_DEVICE_ATTR(node_desc, S_IRUGO | S_IWUSR, show_node_desc,
 649                          set_node_desc);
 650
 651 static struct class_device_attribute *ib_class_attributes[] = {
 652         &class_device_attr_node_type,
 653         &class_device_attr_sys_image_guid,
 654         &class_device_attr_node_guid,
 655         &class_device_attr_node_desc
 656 };
 657
 658 static struct class ib_class = {
 659         .name    = "infiniband",
 660         .release = ib_device_release,
 661         .uevent = ib_device_uevent,
 662 };
 663
 664 int ib_device_register_sysfs(struct ib_device *device)
 665 {
 666         struct class_device *class_dev = &device->class_dev;
 667         int ret;
 668         int i;
 669
 670         class_dev->class      = &ib_class;
 671         class_dev->class_data = device;
 672         class_dev->dev        = device->dma_device;
 673         strlcpy(class_dev->class_id, device->name, BUS_ID_SIZE);
 674
 675         INIT_LIST_HEAD(&device->port_list);
 676
 677         ret = class_device_register(class_dev);
 678         if (ret)
 679                 goto err;
 680
 681         for (i = 0; i < ARRAY_SIZE(ib_class_attributes); ++i) {
 682                 ret = class_device_create_file(class_dev, ib_class_attributes[i]);
 683                 if (ret)
 684                         goto err_unregister;
 685         }
 686
 687         device->ports_parent = kobject_create_and_add("ports",
 688                                         kobject_get(&class_dev->kobj));
 689         if (!device->ports_parent) {
 690                 ret = -ENOMEM;
 691                 goto err_put;
 692         }
 693
 694         if (device->node_type == RDMA_NODE_IB_SWITCH) {
 695                 ret = add_port(device, 0);
 696                 if (ret)
 697                         goto err_put;
 698         } else {
 699                 for (i = 1; i <= device->phys_port_cnt; ++i) {
 700                         ret = add_port(device, i);
 701                         if (ret)
 702                                 goto err_put;
 703                 }
 704         }
 705
 706         return 0;
 707
 708 err_put:
 709         {
 710                 struct kobject *p, *t;
 711                 struct ib_port *port;
 712
 713                 list_for_each_entry_safe(p, t, &device->port_list, entry) {
 714                         list_del(&p->entry);
 715                         port = container_of(p, struct ib_port, kobj);
 716                         sysfs_remove_group(p, &pma_group);
 717                         sysfs_remove_group(p, &port->pkey_group);
 718                         sysfs_remove_group(p, &port->gid_group);
 719                         kobject_put(p);
 720                 }
 721         }
 722
 723         kobject_put(&class_dev->kobj);
 724
 725 err_unregister:
 726         class_device_unregister(class_dev);
 727
 728 err:
 729         return ret;
 730 }
 731
 732 void ib_device_unregister_sysfs(struct ib_device *device)
 733 {
 734         struct kobject *p, *t;
 735         struct ib_port *port;
 736
 737         list_for_each_entry_safe(p, t, &device->port_list, entry) {
 738                 list_del(&p->entry);
 739                 port = container_of(p, struct ib_port, kobj);
 740                 sysfs_remove_group(p, &pma_group);
 741                 sysfs_remove_group(p, &port->pkey_group);
 742                 sysfs_remove_group(p, &port->gid_group);
 743                 kobject_put(p);
 744         }
 745
 746         kobject_put(device->ports_parent);
 747         class_device_unregister(&device->class_dev);
 748 }
 749
 750 int ib_sysfs_setup(void)
 751 {
 752         return class_register(&ib_class);
 753 }
 754
 755 void ib_sysfs_cleanup(void)
 756 {
 757         class_unregister(&ib_class);
 758 }