drivers/infiniband/core/sysfs.c

   1 /*
   2  * Copyright (c) 2004, 2005 Topspin Communications.  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  * $Id: sysfs.c 1349 2004-12-16 21:09:43Z roland $
  33  */
  34
  35 #include "core_priv.h"
  36
  37 #include <ib_mad.h>
  38
  39 struct ib_port {
  40         struct kobject         kobj;
  41         struct ib_device      *ibdev;
  42         struct attribute_group gid_group;
  43         struct attribute_group pkey_group;
  44         u8                     port_num;
  45 };
  46
  47 struct port_attribute {
  48         struct attribute attr;
  49         ssize_t (*show)(struct ib_port *, struct port_attribute *, char *buf);
  50         ssize_t (*store)(struct ib_port *, struct port_attribute *,
  51                          const char *buf, size_t count);
  52 };
  53
  54 #define PORT_ATTR(_name, _mode, _show, _store) \
  55 struct port_attribute port_attr_##_name = __ATTR(_name, _mode, _show, _store)
  56
  57 #define PORT_ATTR_RO(_name) \
  58 struct port_attribute port_attr_##_name = __ATTR_RO(_name)
  59
  60 struct port_table_attribute {
  61         struct port_attribute   attr;
  62         char                    name[8];
  63         int                     index;
  64 };
  65
  66 static ssize_t port_attr_show(struct kobject *kobj,
  67                               struct attribute *attr, char *buf)
  68 {
  69         struct port_attribute *port_attr =
  70                 container_of(attr, struct port_attribute, attr);
  71         struct ib_port *p = container_of(kobj, struct ib_port, kobj);
  72
  73         if (!port_attr->show)
  74                 return -EIO;
  75
  76         return port_attr->show(p, port_attr, buf);
  77 }
  78
  79 static struct sysfs_ops port_sysfs_ops = {
  80         .show = port_attr_show
  81 };
  82
  83 static ssize_t state_show(struct ib_port *p, struct port_attribute *unused,
  84                           char *buf)
  85 {
  86         struct ib_port_attr attr;
  87         ssize_t ret;
  88
  89         static const char *state_name[] = {
  90                 [IB_PORT_NOP]           = "NOP",
  91                 [IB_PORT_DOWN]          = "DOWN",
  92                 [IB_PORT_INIT]          = "INIT",
  93                 [IB_PORT_ARMED]         = "ARMED",
  94                 [IB_PORT_ACTIVE]        = "ACTIVE",
  95                 [IB_PORT_ACTIVE_DEFER]  = "ACTIVE_DEFER"
  96         };
  97
  98         ret = ib_query_port(p->ibdev, p->port_num, &attr);
  99         if (ret)
 100                 return ret;
 101
 102         return sprintf(buf, "%d: %s\n", attr.state,
 103                        attr.state >= 0 && attr.state <= ARRAY_SIZE(state_name) ?
 104                        state_name[attr.state] : "UNKNOWN");
 105 }
 106
 107 static ssize_t lid_show(struct ib_port *p, struct port_attribute *unused,
 108                         char *buf)
 109 {
 110         struct ib_port_attr attr;
 111         ssize_t ret;
 112
 113         ret = ib_query_port(p->ibdev, p->port_num, &attr);
 114         if (ret)
 115                 return ret;
 116
 117         return sprintf(buf, "0x%x\n", attr.lid);
 118 }
 119
 120 static ssize_t lid_mask_count_show(struct ib_port *p,
 121                                    struct port_attribute *unused,
 122                                    char *buf)
 123 {
 124         struct ib_port_attr attr;
 125         ssize_t ret;
 126
 127         ret = ib_query_port(p->ibdev, p->port_num, &attr);
 128         if (ret)
 129                 return ret;
 130
 131         return sprintf(buf, "%d\n", attr.lmc);
 132 }
 133
 134 static ssize_t sm_lid_show(struct ib_port *p, struct port_attribute *unused,
 135                            char *buf)
 136 {
 137         struct ib_port_attr attr;
 138         ssize_t ret;
 139
 140         ret = ib_query_port(p->ibdev, p->port_num, &attr);
 141         if (ret)
 142                 return ret;
 143
 144         return sprintf(buf, "0x%x\n", attr.sm_lid);
 145 }
 146
 147 static ssize_t sm_sl_show(struct ib_port *p, struct port_attribute *unused,
 148                           char *buf)
 149 {
 150         struct ib_port_attr attr;
 151         ssize_t ret;
 152
 153         ret = ib_query_port(p->ibdev, p->port_num, &attr);
 154         if (ret)
 155                 return ret;
 156
 157         return sprintf(buf, "%d\n", attr.sm_sl);
 158 }
 159
 160 static ssize_t cap_mask_show(struct ib_port *p, struct port_attribute *unused,
 161                              char *buf)
 162 {
 163         struct ib_port_attr attr;
 164         ssize_t ret;
 165
 166         ret = ib_query_port(p->ibdev, p->port_num, &attr);
 167         if (ret)
 168                 return ret;
 169
 170         return sprintf(buf, "0x%08x\n", attr.port_cap_flags);
 171 }
 172
 173 static ssize_t rate_show(struct ib_port *p, struct port_attribute *unused,
 174                          char *buf)
 175 {
 176         struct ib_port_attr attr;
 177         char *speed = "";
 178         int rate;
 179         ssize_t ret;
 180
 181         ret = ib_query_port(p->ibdev, p->port_num, &attr);
 182         if (ret)
 183                 return ret;
 184
 185         switch (attr.active_speed) {
 186         case 2: speed = " DDR"; break;
 187         case 4: speed = " QDR"; break;
 188         }
 189
 190         rate = 25 * ib_width_enum_to_int(attr.active_width) * attr.active_speed;
 191         if (rate < 0)
 192                 return -EINVAL;
 193
 194         return sprintf(buf, "%d%s Gb/sec (%dX%s)\n",
 195                        rate / 10, rate % 10 ? ".5" : "",
 196                        ib_width_enum_to_int(attr.active_width), speed);
 197 }
 198
 199 static ssize_t phys_state_show(struct ib_port *p, struct port_attribute *unused,
 200                                char *buf)
 201 {
 202         struct ib_port_attr attr;
 203
 204         ssize_t ret;
 205
 206         ret = ib_query_port(p->ibdev, p->port_num, &attr);
 207         if (ret)
 208                 return ret;
 209
 210         switch (attr.phys_state) {
 211         case 1:  return sprintf(buf, "1: Sleep\n");
 212         case 2:  return sprintf(buf, "2: Polling\n");
 213         case 3:  return sprintf(buf, "3: Disabled\n");
 214         case 4:  return sprintf(buf, "4: PortConfigurationTraining\n");
 215         case 5:  return sprintf(buf, "5: LinkUp\n");
 216         case 6:  return sprintf(buf, "6: LinkErrorRecovery\n");
 217         case 7:  return sprintf(buf, "7: Phy Test\n");
 218         default: return sprintf(buf, "%d: <unknown>\n", attr.phys_state);
 219         }
 220 }
 221
 222 static PORT_ATTR_RO(state);
 223 static PORT_ATTR_RO(lid);
 224 static PORT_ATTR_RO(lid_mask_count);
 225 static PORT_ATTR_RO(sm_lid);
 226 static PORT_ATTR_RO(sm_sl);
 227 static PORT_ATTR_RO(cap_mask);
 228 static PORT_ATTR_RO(rate);
 229 static PORT_ATTR_RO(phys_state);
 230
 231 static struct attribute *port_default_attrs[] = {
 232         &port_attr_state.attr,
 233         &port_attr_lid.attr,
 234         &port_attr_lid_mask_count.attr,
 235         &port_attr_sm_lid.attr,
 236         &port_attr_sm_sl.attr,
 237         &port_attr_cap_mask.attr,
 238         &port_attr_rate.attr,
 239         &port_attr_phys_state.attr,
 240         NULL
 241 };
 242
 243 static ssize_t show_port_gid(struct ib_port *p, struct port_attribute *attr,
 244                              char *buf)
 245 {
 246         struct port_table_attribute *tab_attr =
 247                 container_of(attr, struct port_table_attribute, attr);
 248         union ib_gid gid;
 249         ssize_t ret;
 250
 251         ret = ib_query_gid(p->ibdev, p->port_num, tab_attr->index, &gid);
 252         if (ret)
 253                 return ret;
 254
 255         return sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n",
 256                        be16_to_cpu(((u16 *) gid.raw)[0]),
 257                        be16_to_cpu(((u16 *) gid.raw)[1]),
 258                        be16_to_cpu(((u16 *) gid.raw)[2]),
 259                        be16_to_cpu(((u16 *) gid.raw)[3]),
 260                        be16_to_cpu(((u16 *) gid.raw)[4]),
 261                        be16_to_cpu(((u16 *) gid.raw)[5]),
 262                        be16_to_cpu(((u16 *) gid.raw)[6]),
 263                        be16_to_cpu(((u16 *) gid.raw)[7]));
 264 }
 265
 266 static ssize_t show_port_pkey(struct ib_port *p, struct port_attribute *attr,
 267                               char *buf)
 268 {
 269         struct port_table_attribute *tab_attr =
 270                 container_of(attr, struct port_table_attribute, attr);
 271         u16 pkey;
 272         ssize_t ret;
 273
 274         ret = ib_query_pkey(p->ibdev, p->port_num, tab_attr->index, &pkey);
 275         if (ret)
 276                 return ret;
 277
 278         return sprintf(buf, "0x%04x\n", pkey);
 279 }
 280
 281 #define PORT_PMA_ATTR(_name, _counter, _width, _offset)                 \
 282 struct port_table_attribute port_pma_attr_##_name = {                   \
 283         .attr  = __ATTR(_name, S_IRUGO, show_pma_counter, NULL),        \
 284         .index = (_offset) | ((_width) << 16) | ((_counter) << 24)      \
 285 }
 286
 287 static ssize_t show_pma_counter(struct ib_port *p, struct port_attribute *attr,
 288                                 char *buf)
 289 {
 290         struct port_table_attribute *tab_attr =
 291                 container_of(attr, struct port_table_attribute, attr);
 292         int offset = tab_attr->index & 0xffff;
 293         int width  = (tab_attr->index >> 16) & 0xff;
 294         struct ib_mad *in_mad  = NULL;
 295         struct ib_mad *out_mad = NULL;
 296         ssize_t ret;
 297
 298         if (!p->ibdev->process_mad)
 299                 return sprintf(buf, "N/A (no PMA)\n");
 300
 301         in_mad  = kmalloc(sizeof *in_mad, GFP_KERNEL);
 302         out_mad = kmalloc(sizeof *in_mad, GFP_KERNEL);
 303         if (!in_mad || !out_mad) {
 304                 ret = -ENOMEM;
 305                 goto out;
 306         }
 307
 308         memset(in_mad, 0, sizeof *in_mad);
 309         in_mad->mad_hdr.base_version  = 1;
 310         in_mad->mad_hdr.mgmt_class    = IB_MGMT_CLASS_PERF_MGMT;
 311         in_mad->mad_hdr.class_version = 1;
 312         in_mad->mad_hdr.method        = IB_MGMT_METHOD_GET;
 313         in_mad->mad_hdr.attr_id       = cpu_to_be16(0x12); /* PortCounters */
 314
 315         in_mad->data[41] = p->port_num; /* PortSelect field */
 316
 317         if ((p->ibdev->process_mad(p->ibdev, IB_MAD_IGNORE_MKEY,
 318                  p->port_num, NULL, NULL, in_mad, out_mad) &
 319              (IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY)) !=
 320             (IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY)) {
 321                 ret = -EINVAL;
 322                 goto out;
 323         }
 324
 325         switch (width) {
 326         case 4:
 327                 ret = sprintf(buf, "%u\n", (out_mad->data[40 + offset / 8] >>
 328                                             (offset % 4)) & 0xf);
 329                 break;
 330         case 8:
 331                 ret = sprintf(buf, "%u\n", out_mad->data[40 + offset / 8]);
 332                 break;
 333         case 16:
 334                 ret = sprintf(buf, "%u\n",
 335                               be16_to_cpup((u16 *)(out_mad->data + 40 + offset / 8)));
 336                 break;
 337         case 32:
 338                 ret = sprintf(buf, "%u\n",
 339                               be32_to_cpup((u32 *)(out_mad->data + 40 + offset / 8)));
 340                 break;
 341         default:
 342                 ret = 0;
 343         }
 344
 345 out:
 346         kfree(in_mad);
 347         kfree(out_mad);
 348
 349         return ret;
 350 }
 351
 352 static PORT_PMA_ATTR(symbol_error                   ,  0, 16,  32);
 353 static PORT_PMA_ATTR(link_error_recovery            ,  1,  8,  48);
 354 static PORT_PMA_ATTR(link_downed                    ,  2,  8,  56);
 355 static PORT_PMA_ATTR(port_rcv_errors                ,  3, 16,  64);
 356 static PORT_PMA_ATTR(port_rcv_remote_physical_errors,  4, 16,  80);
 357 static PORT_PMA_ATTR(port_rcv_switch_relay_errors   ,  5, 16,  96);
 358 static PORT_PMA_ATTR(port_xmit_discards             ,  6, 16, 112);
 359 static PORT_PMA_ATTR(port_xmit_constraint_errors    ,  7,  8, 128);
 360 static PORT_PMA_ATTR(port_rcv_constraint_errors     ,  8,  8, 136);
 361 static PORT_PMA_ATTR(local_link_integrity_errors    ,  9,  4, 152);
 362 static PORT_PMA_ATTR(excessive_buffer_overrun_errors, 10,  4, 156);
 363 static PORT_PMA_ATTR(VL15_dropped                   , 11, 16, 176);
 364 static PORT_PMA_ATTR(port_xmit_data                 , 12, 32, 192);
 365 static PORT_PMA_ATTR(port_rcv_data                  , 13, 32, 224);
 366 static PORT_PMA_ATTR(port_xmit_packets              , 14, 32, 256);
 367 static PORT_PMA_ATTR(port_rcv_packets               , 15, 32, 288);
 368
 369 static struct attribute *pma_attrs[] = {
 370         &port_pma_attr_symbol_error.attr.attr,
 371         &port_pma_attr_link_error_recovery.attr.attr,
 372         &port_pma_attr_link_downed.attr.attr,
 373         &port_pma_attr_port_rcv_errors.attr.attr,
 374         &port_pma_attr_port_rcv_remote_physical_errors.attr.attr,
 375         &port_pma_attr_port_rcv_switch_relay_errors.attr.attr,
 376         &port_pma_attr_port_xmit_discards.attr.attr,
 377         &port_pma_attr_port_xmit_constraint_errors.attr.attr,
 378         &port_pma_attr_port_rcv_constraint_errors.attr.attr,
 379         &port_pma_attr_local_link_integrity_errors.attr.attr,
 380         &port_pma_attr_excessive_buffer_overrun_errors.attr.attr,
 381         &port_pma_attr_VL15_dropped.attr.attr,
 382         &port_pma_attr_port_xmit_data.attr.attr,
 383         &port_pma_attr_port_rcv_data.attr.attr,
 384         &port_pma_attr_port_xmit_packets.attr.attr,
 385         &port_pma_attr_port_rcv_packets.attr.attr,
 386         NULL
 387 };
 388
 389 static struct attribute_group pma_group = {
 390         .name  = "counters",
 391         .attrs  = pma_attrs
 392 };
 393
 394 static void ib_port_release(struct kobject *kobj)
 395 {
 396         struct ib_port *p = container_of(kobj, struct ib_port, kobj);
 397         struct attribute *a;
 398         int i;
 399
 400         for (i = 0; (a = p->gid_group.attrs[i]); ++i)
 401                 kfree(a);
 402
 403         kfree(p->gid_group.attrs);
 404
 405         for (i = 0; (a = p->pkey_group.attrs[i]); ++i)
 406                 kfree(a);
 407
 408         kfree(p->pkey_group.attrs);
 409
 410         kfree(p);
 411 }
 412
 413 static struct kobj_type port_type = {
 414         .release       = ib_port_release,
 415         .sysfs_ops     = &port_sysfs_ops,
 416         .default_attrs = port_default_attrs
 417 };
 418
 419 static void ib_device_release(struct class_device *cdev)
 420 {
 421         struct ib_device *dev = container_of(cdev, struct ib_device, class_dev);
 422
 423         kfree(dev);
 424 }
 425
 426 static int ib_device_hotplug(struct class_device *cdev, char **envp,
 427                              int num_envp, char *buf, int size)
 428 {
 429         struct ib_device *dev = container_of(cdev, struct ib_device, class_dev);
 430         int i = 0, len = 0;
 431
 432         if (add_hotplug_env_var(envp, num_envp, &i, buf, size, &len,
 433                                 "NAME=%s", dev->name))
 434                 return -ENOMEM;
 435
 436         /*
 437          * It might be nice to pass the node GUID to hotplug, but
 438          * right now the only way to get it is to query the device
 439          * provider, and this can crash during device removal because
 440          * we are will be running after driver removal has started.
 441          * We could add a node_guid field to struct ib_device, or we
 442          * could just let the hotplug script read the node GUID from
 443          * sysfs when devices are added.
 444          */
 445
 446         envp[i] = NULL;
 447         return 0;
 448 }
 449
 450 static struct attribute **
 451 alloc_group_attrs(ssize_t (*show)(struct ib_port *,
 452                                   struct port_attribute *, char *buf),
 453                   int len)
 454 {
 455         struct attribute **tab_attr;
 456         struct port_table_attribute *element;
 457         int i;
 458
 459         tab_attr = kcalloc(1 + len, sizeof(struct attribute *), GFP_KERNEL);
 460         if (!tab_attr)
 461                 return NULL;
 462
 463         for (i = 0; i < len; i++) {
 464                 element = kcalloc(1, sizeof(struct port_table_attribute),
 465                                   GFP_KERNEL);
 466                 if (!element)
 467                         goto err;
 468
 469                 if (snprintf(element->name, sizeof(element->name),
 470                              "%d", i) >= sizeof(element->name))
 471                         goto err;
 472
 473                 element->attr.attr.name  = element->name;
 474                 element->attr.attr.mode  = S_IRUGO;
 475                 element->attr.attr.owner = THIS_MODULE;
 476                 element->attr.show       = show;
 477                 element->index           = i;
 478
 479                 tab_attr[i] = &element->attr.attr;
 480         }
 481
 482         return tab_attr;
 483
 484 err:
 485         while (--i >= 0)
 486                 kfree(tab_attr[i]);
 487         kfree(tab_attr);
 488         return NULL;
 489 }
 490
 491 static int add_port(struct ib_device *device, int port_num)
 492 {
 493         struct ib_port *p;
 494         struct ib_port_attr attr;
 495         int i;
 496         int ret;
 497
 498         ret = ib_query_port(device, port_num, &attr);
 499         if (ret)
 500                 return ret;
 501
 502         p = kmalloc(sizeof *p, GFP_KERNEL);
 503         if (!p)
 504                 return -ENOMEM;
 505         memset(p, 0, sizeof *p);
 506
 507         p->ibdev      = device;
 508         p->port_num   = port_num;
 509         p->kobj.ktype = &port_type;
 510
 511         p->kobj.parent = kobject_get(&device->ports_parent);
 512         if (!p->kobj.parent) {
 513                 ret = -EBUSY;
 514                 goto err;
 515         }
 516
 517         ret = kobject_set_name(&p->kobj, "%d", port_num);
 518         if (ret)
 519                 goto err_put;
 520
 521         ret = kobject_register(&p->kobj);
 522         if (ret)
 523                 goto err_put;
 524
 525         ret = sysfs_create_group(&p->kobj, &pma_group);
 526         if (ret)
 527                 goto err_put;
 528
 529         p->gid_group.name  = "gids";
 530         p->gid_group.attrs = alloc_group_attrs(show_port_gid, attr.gid_tbl_len);
 531         if (!p->gid_group.attrs)
 532                 goto err_remove_pma;
 533
 534         ret = sysfs_create_group(&p->kobj, &p->gid_group);
 535         if (ret)
 536                 goto err_free_gid;
 537
 538         p->pkey_group.name  = "pkeys";
 539         p->pkey_group.attrs = alloc_group_attrs(show_port_pkey,
 540                                                 attr.pkey_tbl_len);
 541         if (!p->pkey_group.attrs)
 542                 goto err_remove_gid;
 543
 544         ret = sysfs_create_group(&p->kobj, &p->pkey_group);
 545         if (ret)
 546                 goto err_free_pkey;
 547
 548         list_add_tail(&p->kobj.entry, &device->port_list);
 549
 550         return 0;
 551
 552 err_free_pkey:
 553         for (i = 0; i < attr.pkey_tbl_len; ++i)
 554                 kfree(p->pkey_group.attrs[i]);
 555
 556         kfree(p->pkey_group.attrs);
 557
 558 err_remove_gid:
 559         sysfs_remove_group(&p->kobj, &p->gid_group);
 560
 561 err_free_gid:
 562         for (i = 0; i < attr.gid_tbl_len; ++i)
 563                 kfree(p->gid_group.attrs[i]);
 564
 565         kfree(p->gid_group.attrs);
 566
 567 err_remove_pma:
 568         sysfs_remove_group(&p->kobj, &pma_group);
 569
 570 err_put:
 571         kobject_put(&device->ports_parent);
 572
 573 err:
 574         kfree(p);
 575         return ret;
 576 }
 577
 578 static ssize_t show_node_type(struct class_device *cdev, char *buf)
 579 {
 580         struct ib_device *dev = container_of(cdev, struct ib_device, class_dev);
 581
 582         switch (dev->node_type) {
 583         case IB_NODE_CA:     return sprintf(buf, "%d: CA\n", dev->node_type);
 584         case IB_NODE_SWITCH: return sprintf(buf, "%d: switch\n", dev->node_type);
 585         case IB_NODE_ROUTER: return sprintf(buf, "%d: router\n", dev->node_type);
 586         default:             return sprintf(buf, "%d: <unknown>\n", dev->node_type);
 587         }
 588 }
 589
 590 static ssize_t show_sys_image_guid(struct class_device *cdev, char *buf)
 591 {
 592         struct ib_device *dev = container_of(cdev, struct ib_device, class_dev);
 593         struct ib_device_attr attr;
 594         ssize_t ret;
 595
 596         ret = ib_query_device(dev, &attr);
 597         if (ret)
 598                 return ret;
 599
 600         return sprintf(buf, "%04x:%04x:%04x:%04x\n",
 601                        be16_to_cpu(((u16 *) &attr.sys_image_guid)[0]),
 602                        be16_to_cpu(((u16 *) &attr.sys_image_guid)[1]),
 603                        be16_to_cpu(((u16 *) &attr.sys_image_guid)[2]),
 604                        be16_to_cpu(((u16 *) &attr.sys_image_guid)[3]));
 605 }
 606
 607 static ssize_t show_node_guid(struct class_device *cdev, char *buf)
 608 {
 609         struct ib_device *dev = container_of(cdev, struct ib_device, class_dev);
 610         struct ib_device_attr attr;
 611         ssize_t ret;
 612
 613         ret = ib_query_device(dev, &attr);
 614         if (ret)
 615                 return ret;
 616
 617         return sprintf(buf, "%04x:%04x:%04x:%04x\n",
 618                        be16_to_cpu(((u16 *) &attr.node_guid)[0]),
 619                        be16_to_cpu(((u16 *) &attr.node_guid)[1]),
 620                        be16_to_cpu(((u16 *) &attr.node_guid)[2]),
 621                        be16_to_cpu(((u16 *) &attr.node_guid)[3]));
 622 }
 623
 624 static CLASS_DEVICE_ATTR(node_type, S_IRUGO, show_node_type, NULL);
 625 static CLASS_DEVICE_ATTR(sys_image_guid, S_IRUGO, show_sys_image_guid, NULL);
 626 static CLASS_DEVICE_ATTR(node_guid, S_IRUGO, show_node_guid, NULL);
 627
 628 static struct class_device_attribute *ib_class_attributes[] = {
 629         &class_device_attr_node_type,
 630         &class_device_attr_sys_image_guid,
 631         &class_device_attr_node_guid
 632 };
 633
 634 static struct class ib_class = {
 635         .name    = "infiniband",
 636         .release = ib_device_release,
 637         .hotplug = ib_device_hotplug,
 638 };
 639
 640 int ib_device_register_sysfs(struct ib_device *device)
 641 {
 642         struct class_device *class_dev = &device->class_dev;
 643         int ret;
 644         int i;
 645
 646         class_dev->class      = &ib_class;
 647         class_dev->class_data = device;
 648         strlcpy(class_dev->class_id, device->name, BUS_ID_SIZE);
 649
 650         INIT_LIST_HEAD(&device->port_list);
 651
 652         ret = class_device_register(class_dev);
 653         if (ret)
 654                 goto err;
 655
 656         for (i = 0; i < ARRAY_SIZE(ib_class_attributes); ++i) {
 657                 ret = class_device_create_file(class_dev, ib_class_attributes[i]);
 658                 if (ret)
 659                         goto err_unregister;
 660         }
 661
 662         device->ports_parent.parent = kobject_get(&class_dev->kobj);
 663         if (!device->ports_parent.parent) {
 664                 ret = -EBUSY;
 665                 goto err_unregister;
 666         }
 667         ret = kobject_set_name(&device->ports_parent, "ports");
 668         if (ret)
 669                 goto err_put;
 670         ret = kobject_register(&device->ports_parent);
 671         if (ret)
 672                 goto err_put;
 673
 674         if (device->node_type == IB_NODE_SWITCH) {
 675                 ret = add_port(device, 0);
 676                 if (ret)
 677                         goto err_put;
 678         } else {
 679                 int i;
 680
 681                 for (i = 1; i <= device->phys_port_cnt; ++i) {
 682                         ret = add_port(device, i);
 683                         if (ret)
 684                                 goto err_put;
 685                 }
 686         }
 687
 688         return 0;
 689
 690 err_put:
 691         {
 692                 struct kobject *p, *t;
 693                 struct ib_port *port;
 694
 695                 list_for_each_entry_safe(p, t, &device->port_list, entry) {
 696                         list_del(&p->entry);
 697                         port = container_of(p, struct ib_port, kobj);
 698                         sysfs_remove_group(p, &pma_group);
 699                         sysfs_remove_group(p, &port->pkey_group);
 700                         sysfs_remove_group(p, &port->gid_group);
 701                         kobject_unregister(p);
 702                 }
 703         }
 704
 705         kobject_put(&class_dev->kobj);
 706
 707 err_unregister:
 708         class_device_unregister(class_dev);
 709
 710 err:
 711         return ret;
 712 }
 713
 714 void ib_device_unregister_sysfs(struct ib_device *device)
 715 {
 716         struct kobject *p, *t;
 717         struct ib_port *port;
 718
 719         list_for_each_entry_safe(p, t, &device->port_list, entry) {
 720                 list_del(&p->entry);
 721                 port = container_of(p, struct ib_port, kobj);
 722                 sysfs_remove_group(p, &pma_group);
 723                 sysfs_remove_group(p, &port->pkey_group);
 724                 sysfs_remove_group(p, &port->gid_group);
 725                 kobject_unregister(p);
 726         }
 727
 728         kobject_unregister(&device->ports_parent);
 729         class_device_unregister(&device->class_dev);
 730 }
 731
 732 int ib_sysfs_setup(void)
 733 {
 734         return class_register(&ib_class);
 735 }
 736
 737 void ib_sysfs_cleanup(void)
 738 {
 739         class_unregister(&ib_class);
 740 }