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
  35 #include "core_priv.h"
  36
  37 #include <linux/slab.h>
  38 #include <linux/stat.h>
  39 #include <linux/string.h>
  40
  41 #include <rdma/ib_mad.h>
  42
  43 struct ib_port {
  44         struct kobject         kobj;
  45         struct ib_device      *ibdev;
  46         struct attribute_group gid_group;
  47         struct attribute_group pkey_group;
  48         u8                     port_num;
  49 };
  50
  51 struct port_attribute {
  52         struct attribute attr;
  53         ssize_t (*show)(struct ib_port *, struct port_attribute *, char *buf);
  54         ssize_t (*store)(struct ib_port *, struct port_attribute *,
  55                          const char *buf, size_t count);
  56 };
  57
  58 #define PORT_ATTR(_name, _mode, _show, _store) \
  59 struct port_attribute port_attr_##_name = __ATTR(_name, _mode, _show, _store)
  60
  61 #define PORT_ATTR_RO(_name) \
  62 struct port_attribute port_attr_##_name = __ATTR_RO(_name)
  63
  64 struct port_table_attribute {
  65         struct port_attribute   attr;
  66         char                    name[8];
  67         int                     index;
  68 };
  69
  70 static ssize_t port_attr_show(struct kobject *kobj,
  71                               struct attribute *attr, char *buf)
  72 {
  73         struct port_attribute *port_attr =
  74                 container_of(attr, struct port_attribute, attr);
  75         struct ib_port *p = container_of(kobj, struct ib_port, kobj);
  76
  77         if (!port_attr->show)
  78                 return -EIO;
  79
  80         return port_attr->show(p, port_attr, buf);
  81 }
  82
  83 static const struct sysfs_ops port_sysfs_ops = {
  84         .show = port_attr_show
  85 };
  86
  87 static ssize_t state_show(struct ib_port *p, struct port_attribute *unused,
  88                           char *buf)
  89 {
  90         struct ib_port_attr attr;
  91         ssize_t ret;
  92
  93         static const char *state_name[] = {
  94                 [IB_PORT_NOP]           = "NOP",
  95                 [IB_PORT_DOWN]          = "DOWN",
  96                 [IB_PORT_INIT]          = "INIT",
  97                 [IB_PORT_ARMED]         = "ARMED",
  98                 [IB_PORT_ACTIVE]        = "ACTIVE",
  99                 [IB_PORT_ACTIVE_DEFER]  = "ACTIVE_DEFER"
 100         };
 101
 102         ret = ib_query_port(p->ibdev, p->port_num, &attr);
 103         if (ret)
 104                 return ret;
 105
 106         return sprintf(buf, "%d: %s\n", attr.state,
 107                        attr.state >= 0 && attr.state < ARRAY_SIZE(state_name) ?
 108                        state_name[attr.state] : "UNKNOWN");
 109 }
 110
 111 static ssize_t lid_show(struct ib_port *p, struct port_attribute *unused,
 112                         char *buf)
 113 {
 114         struct ib_port_attr attr;
 115         ssize_t ret;
 116
 117         ret = ib_query_port(p->ibdev, p->port_num, &attr);
 118         if (ret)
 119                 return ret;
 120
 121         return sprintf(buf, "0x%x\n", attr.lid);
 122 }
 123
 124 static ssize_t lid_mask_count_show(struct ib_port *p,
 125                                    struct port_attribute *unused,
 126                                    char *buf)
 127 {
 128         struct ib_port_attr attr;
 129         ssize_t ret;
 130
 131         ret = ib_query_port(p->ibdev, p->port_num, &attr);
 132         if (ret)
 133                 return ret;
 134
 135         return sprintf(buf, "%d\n", attr.lmc);
 136 }
 137
 138 static ssize_t sm_lid_show(struct ib_port *p, struct port_attribute *unused,
 139                            char *buf)
 140 {
 141         struct ib_port_attr attr;
 142         ssize_t ret;
 143
 144         ret = ib_query_port(p->ibdev, p->port_num, &attr);
 145         if (ret)
 146                 return ret;
 147
 148         return sprintf(buf, "0x%x\n", attr.sm_lid);
 149 }
 150
 151 static ssize_t sm_sl_show(struct ib_port *p, struct port_attribute *unused,
 152                           char *buf)
 153 {
 154         struct ib_port_attr attr;
 155         ssize_t ret;
 156
 157         ret = ib_query_port(p->ibdev, p->port_num, &attr);
 158         if (ret)
 159                 return ret;
 160
 161         return sprintf(buf, "%d\n", attr.sm_sl);
 162 }
 163
 164 static ssize_t cap_mask_show(struct ib_port *p, struct port_attribute *unused,
 165                              char *buf)
 166 {
 167         struct ib_port_attr attr;
 168         ssize_t ret;
 169
 170         ret = ib_query_port(p->ibdev, p->port_num, &attr);
 171         if (ret)
 172                 return ret;
 173
 174         return sprintf(buf, "0x%08x\n", attr.port_cap_flags);
 175 }
 176
 177 static ssize_t rate_show(struct ib_port *p, struct port_attribute *unused,
 178                          char *buf)
 179 {
 180         struct ib_port_attr attr;
 181         char *speed = "";
 182         int rate;               /* in deci-Gb/sec */
 183         ssize_t ret;
 184
 185         ret = ib_query_port(p->ibdev, p->port_num, &attr);
 186         if (ret)
 187                 return ret;
 188
 189         switch (attr.active_speed) {
 190         case IB_SPEED_DDR:
 191                 speed = " DDR";
 192                 rate = 50;
 193                 break;
 194         case IB_SPEED_QDR:
 195                 speed = " QDR";
 196                 rate = 100;
 197                 break;
 198         case IB_SPEED_FDR10:
 199                 speed = " FDR10";
 200                 rate = 100;
 201                 break;
 202         case IB_SPEED_FDR:
 203                 speed = " FDR";
 204                 rate = 140;
 205                 break;
 206         case IB_SPEED_EDR:
 207                 speed = " EDR";
 208                 rate = 250;
 209                 break;
 210         case IB_SPEED_SDR:
 211         default:                /* default to SDR for invalid rates */
 212                 rate = 25;
 213                 break;
 214         }
 215
 216         rate *= ib_width_enum_to_int(attr.active_width);
 217         if (rate < 0)
 218                 return -EINVAL;
 219
 220         return sprintf(buf, "%d%s Gb/sec (%dX%s)\n",
 221                        rate / 10, rate % 10 ? ".5" : "",
 222                        ib_width_enum_to_int(attr.active_width), speed);
 223 }
 224
 225 static ssize_t phys_state_show(struct ib_port *p, struct port_attribute *unused,
 226                                char *buf)
 227 {
 228         struct ib_port_attr attr;
 229
 230         ssize_t ret;
 231
 232         ret = ib_query_port(p->ibdev, p->port_num, &attr);
 233         if (ret)
 234                 return ret;
 235
 236         switch (attr.phys_state) {
 237         case 1:  return sprintf(buf, "1: Sleep\n");
 238         case 2:  return sprintf(buf, "2: Polling\n");
 239         case 3:  return sprintf(buf, "3: Disabled\n");
 240         case 4:  return sprintf(buf, "4: PortConfigurationTraining\n");
 241         case 5:  return sprintf(buf, "5: LinkUp\n");
 242         case 6:  return sprintf(buf, "6: LinkErrorRecovery\n");
 243         case 7:  return sprintf(buf, "7: Phy Test\n");
 244         default: return sprintf(buf, "%d: <unknown>\n", attr.phys_state);
 245         }
 246 }
 247
 248 static ssize_t link_layer_show(struct ib_port *p, struct port_attribute *unused,
 249                                char *buf)
 250 {
 251         switch (rdma_port_get_link_layer(p->ibdev, p->port_num)) {
 252         case IB_LINK_LAYER_INFINIBAND:
 253                 return sprintf(buf, "%s\n", "InfiniBand");
 254         case IB_LINK_LAYER_ETHERNET:
 255                 return sprintf(buf, "%s\n", "Ethernet");
 256         default:
 257                 return sprintf(buf, "%s\n", "Unknown");
 258         }
 259 }
 260
 261 static PORT_ATTR_RO(state);
 262 static PORT_ATTR_RO(lid);
 263 static PORT_ATTR_RO(lid_mask_count);
 264 static PORT_ATTR_RO(sm_lid);
 265 static PORT_ATTR_RO(sm_sl);
 266 static PORT_ATTR_RO(cap_mask);
 267 static PORT_ATTR_RO(rate);
 268 static PORT_ATTR_RO(phys_state);
 269 static PORT_ATTR_RO(link_layer);
 270
 271 static struct attribute *port_default_attrs[] = {
 272         &port_attr_state.attr,
 273         &port_attr_lid.attr,
 274         &port_attr_lid_mask_count.attr,
 275         &port_attr_sm_lid.attr,
 276         &port_attr_sm_sl.attr,
 277         &port_attr_cap_mask.attr,
 278         &port_attr_rate.attr,
 279         &port_attr_phys_state.attr,
 280         &port_attr_link_layer.attr,
 281         NULL
 282 };
 283
 284 static ssize_t show_port_gid(struct ib_port *p, struct port_attribute *attr,
 285                              char *buf)
 286 {
 287         struct port_table_attribute *tab_attr =
 288                 container_of(attr, struct port_table_attribute, attr);
 289         union ib_gid gid;
 290         ssize_t ret;
 291
 292         ret = ib_query_gid(p->ibdev, p->port_num, tab_attr->index, &gid);
 293         if (ret)
 294                 return ret;
 295
 296         return sprintf(buf, "%pI6\n", gid.raw);
 297 }
 298
 299 static ssize_t show_port_pkey(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         u16 pkey;
 305         ssize_t ret;
 306
 307         ret = ib_query_pkey(p->ibdev, p->port_num, tab_attr->index, &pkey);
 308         if (ret)
 309                 return ret;
 310
 311         return sprintf(buf, "0x%04x\n", pkey);
 312 }
 313
 314 #define PORT_PMA_ATTR(_name, _counter, _width, _offset)                 \
 315 struct port_table_attribute port_pma_attr_##_name = {                   \
 316         .attr  = __ATTR(_name, S_IRUGO, show_pma_counter, NULL),        \
 317         .index = (_offset) | ((_width) << 16) | ((_counter) << 24)      \
 318 }
 319
 320 static ssize_t show_pma_counter(struct ib_port *p, struct port_attribute *attr,
 321                                 char *buf)
 322 {
 323         struct port_table_attribute *tab_attr =
 324                 container_of(attr, struct port_table_attribute, attr);
 325         int offset = tab_attr->index & 0xffff;
 326         int width  = (tab_attr->index >> 16) & 0xff;
 327         struct ib_mad *in_mad  = NULL;
 328         struct ib_mad *out_mad = NULL;
 329         ssize_t ret;
 330
 331         if (!p->ibdev->process_mad)
 332                 return sprintf(buf, "N/A (no PMA)\n");
 333
 334         in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
 335         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 336         if (!in_mad || !out_mad) {
 337                 ret = -ENOMEM;
 338                 goto out;
 339         }
 340
 341         in_mad->mad_hdr.base_version  = 1;
 342         in_mad->mad_hdr.mgmt_class    = IB_MGMT_CLASS_PERF_MGMT;
 343         in_mad->mad_hdr.class_version = 1;
 344         in_mad->mad_hdr.method        = IB_MGMT_METHOD_GET;
 345         in_mad->mad_hdr.attr_id       = cpu_to_be16(0x12); /* PortCounters */
 346
 347         in_mad->data[41] = p->port_num; /* PortSelect field */
 348
 349         if ((p->ibdev->process_mad(p->ibdev, IB_MAD_IGNORE_MKEY,
 350                  p->port_num, NULL, NULL, in_mad, out_mad) &
 351              (IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY)) !=
 352             (IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY)) {
 353                 ret = -EINVAL;
 354                 goto out;
 355         }
 356
 357         switch (width) {
 358         case 4:
 359                 ret = sprintf(buf, "%u\n", (out_mad->data[40 + offset / 8] >>
 360                                             (4 - (offset % 8))) & 0xf);
 361                 break;
 362         case 8:
 363                 ret = sprintf(buf, "%u\n", out_mad->data[40 + offset / 8]);
 364                 break;
 365         case 16:
 366                 ret = sprintf(buf, "%u\n",
 367                               be16_to_cpup((__be16 *)(out_mad->data + 40 + offset / 8)));
 368                 break;
 369         case 32:
 370                 ret = sprintf(buf, "%u\n",
 371                               be32_to_cpup((__be32 *)(out_mad->data + 40 + offset / 8)));
 372                 break;
 373         default:
 374                 ret = 0;
 375         }
 376
 377 out:
 378         kfree(in_mad);
 379         kfree(out_mad);
 380
 381         return ret;
 382 }
 383
 384 static PORT_PMA_ATTR(symbol_error                   ,  0, 16,  32);
 385 static PORT_PMA_ATTR(link_error_recovery            ,  1,  8,  48);
 386 static PORT_PMA_ATTR(link_downed                    ,  2,  8,  56);
 387 static PORT_PMA_ATTR(port_rcv_errors                ,  3, 16,  64);
 388 static PORT_PMA_ATTR(port_rcv_remote_physical_errors,  4, 16,  80);
 389 static PORT_PMA_ATTR(port_rcv_switch_relay_errors   ,  5, 16,  96);
 390 static PORT_PMA_ATTR(port_xmit_discards             ,  6, 16, 112);
 391 static PORT_PMA_ATTR(port_xmit_constraint_errors    ,  7,  8, 128);
 392 static PORT_PMA_ATTR(port_rcv_constraint_errors     ,  8,  8, 136);
 393 static PORT_PMA_ATTR(local_link_integrity_errors    ,  9,  4, 152);
 394 static PORT_PMA_ATTR(excessive_buffer_overrun_errors, 10,  4, 156);
 395 static PORT_PMA_ATTR(VL15_dropped                   , 11, 16, 176);
 396 static PORT_PMA_ATTR(port_xmit_data                 , 12, 32, 192);
 397 static PORT_PMA_ATTR(port_rcv_data                  , 13, 32, 224);
 398 static PORT_PMA_ATTR(port_xmit_packets              , 14, 32, 256);
 399 static PORT_PMA_ATTR(port_rcv_packets               , 15, 32, 288);
 400
 401 static struct attribute *pma_attrs[] = {
 402         &port_pma_attr_symbol_error.attr.attr,
 403         &port_pma_attr_link_error_recovery.attr.attr,
 404         &port_pma_attr_link_downed.attr.attr,
 405         &port_pma_attr_port_rcv_errors.attr.attr,
 406         &port_pma_attr_port_rcv_remote_physical_errors.attr.attr,
 407         &port_pma_attr_port_rcv_switch_relay_errors.attr.attr,
 408         &port_pma_attr_port_xmit_discards.attr.attr,
 409         &port_pma_attr_port_xmit_constraint_errors.attr.attr,
 410         &port_pma_attr_port_rcv_constraint_errors.attr.attr,
 411         &port_pma_attr_local_link_integrity_errors.attr.attr,
 412         &port_pma_attr_excessive_buffer_overrun_errors.attr.attr,
 413         &port_pma_attr_VL15_dropped.attr.attr,
 414         &port_pma_attr_port_xmit_data.attr.attr,
 415         &port_pma_attr_port_rcv_data.attr.attr,
 416         &port_pma_attr_port_xmit_packets.attr.attr,
 417         &port_pma_attr_port_rcv_packets.attr.attr,
 418         NULL
 419 };
 420
 421 static struct attribute_group pma_group = {
 422         .name  = "counters",
 423         .attrs  = pma_attrs
 424 };
 425
 426 static void ib_port_release(struct kobject *kobj)
 427 {
 428         struct ib_port *p = container_of(kobj, struct ib_port, kobj);
 429         struct attribute *a;
 430         int i;
 431
 432         for (i = 0; (a = p->gid_group.attrs[i]); ++i)
 433                 kfree(a);
 434
 435         kfree(p->gid_group.attrs);
 436
 437         for (i = 0; (a = p->pkey_group.attrs[i]); ++i)
 438                 kfree(a);
 439
 440         kfree(p->pkey_group.attrs);
 441
 442         kfree(p);
 443 }
 444
 445 static struct kobj_type port_type = {
 446         .release       = ib_port_release,
 447         .sysfs_ops     = &port_sysfs_ops,
 448         .default_attrs = port_default_attrs
 449 };
 450
 451 static void ib_device_release(struct device *device)
 452 {
 453         struct ib_device *dev = container_of(device, struct ib_device, dev);
 454
 455         kfree(dev);
 456 }
 457
 458 static int ib_device_uevent(struct device *device,
 459                             struct kobj_uevent_env *env)
 460 {
 461         struct ib_device *dev = container_of(device, struct ib_device, dev);
 462
 463         if (add_uevent_var(env, "NAME=%s", dev->name))
 464                 return -ENOMEM;
 465
 466         /*
 467          * It would be nice to pass the node GUID with the event...
 468          */
 469
 470         return 0;
 471 }
 472
 473 static struct attribute **
 474 alloc_group_attrs(ssize_t (*show)(struct ib_port *,
 475                                   struct port_attribute *, char *buf),
 476                   int len)
 477 {
 478         struct attribute **tab_attr;
 479         struct port_table_attribute *element;
 480         int i;
 481
 482         tab_attr = kcalloc(1 + len, sizeof(struct attribute *), GFP_KERNEL);
 483         if (!tab_attr)
 484                 return NULL;
 485
 486         for (i = 0; i < len; i++) {
 487                 element = kzalloc(sizeof(struct port_table_attribute),
 488                                   GFP_KERNEL);
 489                 if (!element)
 490                         goto err;
 491
 492                 if (snprintf(element->name, sizeof(element->name),
 493                              "%d", i) >= sizeof(element->name)) {
 494                         kfree(element);
 495                         goto err;
 496                 }
 497
 498                 element->attr.attr.name  = element->name;
 499                 element->attr.attr.mode  = S_IRUGO;
 500                 element->attr.show       = show;
 501                 element->index           = i;
 502                 sysfs_attr_init(&element->attr.attr);
 503
 504                 tab_attr[i] = &element->attr.attr;
 505         }
 506
 507         return tab_attr;
 508
 509 err:
 510         while (--i >= 0)
 511                 kfree(tab_attr[i]);
 512         kfree(tab_attr);
 513         return NULL;
 514 }
 515
 516 static int add_port(struct ib_device *device, int port_num,
 517                     int (*port_callback)(struct ib_device *,
 518                                          u8, struct kobject *))
 519 {
 520         struct ib_port *p;
 521         struct ib_port_attr attr;
 522         int i;
 523         int ret;
 524
 525         ret = ib_query_port(device, port_num, &attr);
 526         if (ret)
 527                 return ret;
 528
 529         p = kzalloc(sizeof *p, GFP_KERNEL);
 530         if (!p)
 531                 return -ENOMEM;
 532
 533         p->ibdev      = device;
 534         p->port_num   = port_num;
 535
 536         ret = kobject_init_and_add(&p->kobj, &port_type,
 537                                    kobject_get(device->ports_parent),
 538                                    "%d", port_num);
 539         if (ret)
 540                 goto err_put;
 541
 542         ret = sysfs_create_group(&p->kobj, &pma_group);
 543         if (ret)
 544                 goto err_put;
 545
 546         p->gid_group.name  = "gids";
 547         p->gid_group.attrs = alloc_group_attrs(show_port_gid, attr.gid_tbl_len);
 548         if (!p->gid_group.attrs) {
 549                 ret = -ENOMEM;
 550                 goto err_remove_pma;
 551         }
 552
 553         ret = sysfs_create_group(&p->kobj, &p->gid_group);
 554         if (ret)
 555                 goto err_free_gid;
 556
 557         p->pkey_group.name  = "pkeys";
 558         p->pkey_group.attrs = alloc_group_attrs(show_port_pkey,
 559                                                 attr.pkey_tbl_len);
 560         if (!p->pkey_group.attrs) {
 561                 ret = -ENOMEM;
 562                 goto err_remove_gid;
 563         }
 564
 565         ret = sysfs_create_group(&p->kobj, &p->pkey_group);
 566         if (ret)
 567                 goto err_free_pkey;
 568
 569         if (port_callback) {
 570                 ret = port_callback(device, port_num, &p->kobj);
 571                 if (ret)
 572                         goto err_remove_pkey;
 573         }
 574
 575         list_add_tail(&p->kobj.entry, &device->port_list);
 576
 577         kobject_uevent(&p->kobj, KOBJ_ADD);
 578         return 0;
 579
 580 err_remove_pkey:
 581         sysfs_remove_group(&p->kobj, &p->pkey_group);
 582
 583 err_free_pkey:
 584         for (i = 0; i < attr.pkey_tbl_len; ++i)
 585                 kfree(p->pkey_group.attrs[i]);
 586
 587         kfree(p->pkey_group.attrs);
 588
 589 err_remove_gid:
 590         sysfs_remove_group(&p->kobj, &p->gid_group);
 591
 592 err_free_gid:
 593         for (i = 0; i < attr.gid_tbl_len; ++i)
 594                 kfree(p->gid_group.attrs[i]);
 595
 596         kfree(p->gid_group.attrs);
 597
 598 err_remove_pma:
 599         sysfs_remove_group(&p->kobj, &pma_group);
 600
 601 err_put:
 602         kobject_put(device->ports_parent);
 603         kfree(p);
 604         return ret;
 605 }
 606
 607 static ssize_t show_node_type(struct device *device,
 608                               struct device_attribute *attr, char *buf)
 609 {
 610         struct ib_device *dev = container_of(device, struct ib_device, dev);
 611
 612         switch (dev->node_type) {
 613         case RDMA_NODE_IB_CA:     return sprintf(buf, "%d: CA\n", dev->node_type);
 614         case RDMA_NODE_RNIC:      return sprintf(buf, "%d: RNIC\n", dev->node_type);
 615         case RDMA_NODE_USNIC:     return sprintf(buf, "%d: usNIC\n", dev->node_type);
 616         case RDMA_NODE_IB_SWITCH: return sprintf(buf, "%d: switch\n", dev->node_type);
 617         case RDMA_NODE_IB_ROUTER: return sprintf(buf, "%d: router\n", dev->node_type);
 618         default:                  return sprintf(buf, "%d: <unknown>\n", dev->node_type);
 619         }
 620 }
 621
 622 static ssize_t show_sys_image_guid(struct device *device,
 623                                    struct device_attribute *dev_attr, char *buf)
 624 {
 625         struct ib_device *dev = container_of(device, struct ib_device, dev);
 626         struct ib_device_attr attr;
 627         ssize_t ret;
 628
 629         ret = ib_query_device(dev, &attr);
 630         if (ret)
 631                 return ret;
 632
 633         return sprintf(buf, "%04x:%04x:%04x:%04x\n",
 634                        be16_to_cpu(((__be16 *) &attr.sys_image_guid)[0]),
 635                        be16_to_cpu(((__be16 *) &attr.sys_image_guid)[1]),
 636                        be16_to_cpu(((__be16 *) &attr.sys_image_guid)[2]),
 637                        be16_to_cpu(((__be16 *) &attr.sys_image_guid)[3]));
 638 }
 639
 640 static ssize_t show_node_guid(struct device *device,
 641                               struct device_attribute *attr, char *buf)
 642 {
 643         struct ib_device *dev = container_of(device, struct ib_device, dev);
 644
 645         return sprintf(buf, "%04x:%04x:%04x:%04x\n",
 646                        be16_to_cpu(((__be16 *) &dev->node_guid)[0]),
 647                        be16_to_cpu(((__be16 *) &dev->node_guid)[1]),
 648                        be16_to_cpu(((__be16 *) &dev->node_guid)[2]),
 649                        be16_to_cpu(((__be16 *) &dev->node_guid)[3]));
 650 }
 651
 652 static ssize_t show_node_desc(struct device *device,
 653                               struct device_attribute *attr, char *buf)
 654 {
 655         struct ib_device *dev = container_of(device, struct ib_device, dev);
 656
 657         return sprintf(buf, "%.64s\n", dev->node_desc);
 658 }
 659
 660 static ssize_t set_node_desc(struct device *device,
 661                              struct device_attribute *attr,
 662                              const char *buf, size_t count)
 663 {
 664         struct ib_device *dev = container_of(device, struct ib_device, dev);
 665         struct ib_device_modify desc = {};
 666         int ret;
 667
 668         if (!dev->modify_device)
 669                 return -EIO;
 670
 671         memcpy(desc.node_desc, buf, min_t(int, count, 64));
 672         ret = ib_modify_device(dev, IB_DEVICE_MODIFY_NODE_DESC, &desc);
 673         if (ret)
 674                 return ret;
 675
 676         return count;
 677 }
 678
 679 static DEVICE_ATTR(node_type, S_IRUGO, show_node_type, NULL);
 680 static DEVICE_ATTR(sys_image_guid, S_IRUGO, show_sys_image_guid, NULL);
 681 static DEVICE_ATTR(node_guid, S_IRUGO, show_node_guid, NULL);
 682 static DEVICE_ATTR(node_desc, S_IRUGO | S_IWUSR, show_node_desc, set_node_desc);
 683
 684 static struct device_attribute *ib_class_attributes[] = {
 685         &dev_attr_node_type,
 686         &dev_attr_sys_image_guid,
 687         &dev_attr_node_guid,
 688         &dev_attr_node_desc
 689 };
 690
 691 static struct class ib_class = {
 692         .name    = "infiniband",
 693         .dev_release = ib_device_release,
 694         .dev_uevent = ib_device_uevent,
 695 };
 696
 697 /* Show a given an attribute in the statistics group */
 698 static ssize_t show_protocol_stat(const struct device *device,
 699                             struct device_attribute *attr, char *buf,
 700                             unsigned offset)
 701 {
 702         struct ib_device *dev = container_of(device, struct ib_device, dev);
 703         union rdma_protocol_stats stats;
 704         ssize_t ret;
 705
 706         ret = dev->get_protocol_stats(dev, &stats);
 707         if (ret)
 708                 return ret;
 709
 710         return sprintf(buf, "%llu\n",
 711                        (unsigned long long) ((u64 *) &stats)[offset]);
 712 }
 713
 714 /* generate a read-only iwarp statistics attribute */
 715 #define IW_STATS_ENTRY(name)                                            \
 716 static ssize_t show_##name(struct device *device,                       \
 717                            struct device_attribute *attr, char *buf)    \
 718 {                                                                       \
 719         return show_protocol_stat(device, attr, buf,                    \
 720                                   offsetof(struct iw_protocol_stats, name) / \
 721                                   sizeof (u64));                        \
 722 }                                                                       \
 723 static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL)
 724
 725 IW_STATS_ENTRY(ipInReceives);
 726 IW_STATS_ENTRY(ipInHdrErrors);
 727 IW_STATS_ENTRY(ipInTooBigErrors);
 728 IW_STATS_ENTRY(ipInNoRoutes);
 729 IW_STATS_ENTRY(ipInAddrErrors);
 730 IW_STATS_ENTRY(ipInUnknownProtos);
 731 IW_STATS_ENTRY(ipInTruncatedPkts);
 732 IW_STATS_ENTRY(ipInDiscards);
 733 IW_STATS_ENTRY(ipInDelivers);
 734 IW_STATS_ENTRY(ipOutForwDatagrams);
 735 IW_STATS_ENTRY(ipOutRequests);
 736 IW_STATS_ENTRY(ipOutDiscards);
 737 IW_STATS_ENTRY(ipOutNoRoutes);
 738 IW_STATS_ENTRY(ipReasmTimeout);
 739 IW_STATS_ENTRY(ipReasmReqds);
 740 IW_STATS_ENTRY(ipReasmOKs);
 741 IW_STATS_ENTRY(ipReasmFails);
 742 IW_STATS_ENTRY(ipFragOKs);
 743 IW_STATS_ENTRY(ipFragFails);
 744 IW_STATS_ENTRY(ipFragCreates);
 745 IW_STATS_ENTRY(ipInMcastPkts);
 746 IW_STATS_ENTRY(ipOutMcastPkts);
 747 IW_STATS_ENTRY(ipInBcastPkts);
 748 IW_STATS_ENTRY(ipOutBcastPkts);
 749 IW_STATS_ENTRY(tcpRtoAlgorithm);
 750 IW_STATS_ENTRY(tcpRtoMin);
 751 IW_STATS_ENTRY(tcpRtoMax);
 752 IW_STATS_ENTRY(tcpMaxConn);
 753 IW_STATS_ENTRY(tcpActiveOpens);
 754 IW_STATS_ENTRY(tcpPassiveOpens);
 755 IW_STATS_ENTRY(tcpAttemptFails);
 756 IW_STATS_ENTRY(tcpEstabResets);
 757 IW_STATS_ENTRY(tcpCurrEstab);
 758 IW_STATS_ENTRY(tcpInSegs);
 759 IW_STATS_ENTRY(tcpOutSegs);
 760 IW_STATS_ENTRY(tcpRetransSegs);
 761 IW_STATS_ENTRY(tcpInErrs);
 762 IW_STATS_ENTRY(tcpOutRsts);
 763
 764 static struct attribute *iw_proto_stats_attrs[] = {
 765         &dev_attr_ipInReceives.attr,
 766         &dev_attr_ipInHdrErrors.attr,
 767         &dev_attr_ipInTooBigErrors.attr,
 768         &dev_attr_ipInNoRoutes.attr,
 769         &dev_attr_ipInAddrErrors.attr,
 770         &dev_attr_ipInUnknownProtos.attr,
 771         &dev_attr_ipInTruncatedPkts.attr,
 772         &dev_attr_ipInDiscards.attr,
 773         &dev_attr_ipInDelivers.attr,
 774         &dev_attr_ipOutForwDatagrams.attr,
 775         &dev_attr_ipOutRequests.attr,
 776         &dev_attr_ipOutDiscards.attr,
 777         &dev_attr_ipOutNoRoutes.attr,
 778         &dev_attr_ipReasmTimeout.attr,
 779         &dev_attr_ipReasmReqds.attr,
 780         &dev_attr_ipReasmOKs.attr,
 781         &dev_attr_ipReasmFails.attr,
 782         &dev_attr_ipFragOKs.attr,
 783         &dev_attr_ipFragFails.attr,
 784         &dev_attr_ipFragCreates.attr,
 785         &dev_attr_ipInMcastPkts.attr,
 786         &dev_attr_ipOutMcastPkts.attr,
 787         &dev_attr_ipInBcastPkts.attr,
 788         &dev_attr_ipOutBcastPkts.attr,
 789         &dev_attr_tcpRtoAlgorithm.attr,
 790         &dev_attr_tcpRtoMin.attr,
 791         &dev_attr_tcpRtoMax.attr,
 792         &dev_attr_tcpMaxConn.attr,
 793         &dev_attr_tcpActiveOpens.attr,
 794         &dev_attr_tcpPassiveOpens.attr,
 795         &dev_attr_tcpAttemptFails.attr,
 796         &dev_attr_tcpEstabResets.attr,
 797         &dev_attr_tcpCurrEstab.attr,
 798         &dev_attr_tcpInSegs.attr,
 799         &dev_attr_tcpOutSegs.attr,
 800         &dev_attr_tcpRetransSegs.attr,
 801         &dev_attr_tcpInErrs.attr,
 802         &dev_attr_tcpOutRsts.attr,
 803         NULL
 804 };
 805
 806 static struct attribute_group iw_stats_group = {
 807         .name   = "proto_stats",
 808         .attrs  = iw_proto_stats_attrs,
 809 };
 810
 811 int ib_device_register_sysfs(struct ib_device *device,
 812                              int (*port_callback)(struct ib_device *,
 813                                                   u8, struct kobject *))
 814 {
 815         struct device *class_dev = &device->dev;
 816         int ret;
 817         int i;
 818
 819         class_dev->class      = &ib_class;
 820         class_dev->parent     = device->dma_device;
 821         dev_set_name(class_dev, "%s", device->name);
 822         dev_set_drvdata(class_dev, device);
 823
 824         INIT_LIST_HEAD(&device->port_list);
 825
 826         ret = device_register(class_dev);
 827         if (ret)
 828                 goto err;
 829
 830         for (i = 0; i < ARRAY_SIZE(ib_class_attributes); ++i) {
 831                 ret = device_create_file(class_dev, ib_class_attributes[i]);
 832                 if (ret)
 833                         goto err_unregister;
 834         }
 835
 836         device->ports_parent = kobject_create_and_add("ports",
 837                                         kobject_get(&class_dev->kobj));
 838         if (!device->ports_parent) {
 839                 ret = -ENOMEM;
 840                 goto err_put;
 841         }
 842
 843         if (device->node_type == RDMA_NODE_IB_SWITCH) {
 844                 ret = add_port(device, 0, port_callback);
 845                 if (ret)
 846                         goto err_put;
 847         } else {
 848                 for (i = 1; i <= device->phys_port_cnt; ++i) {
 849                         ret = add_port(device, i, port_callback);
 850                         if (ret)
 851                                 goto err_put;
 852                 }
 853         }
 854
 855         if (device->node_type == RDMA_NODE_RNIC && device->get_protocol_stats) {
 856                 ret = sysfs_create_group(&class_dev->kobj, &iw_stats_group);
 857                 if (ret)
 858                         goto err_put;
 859         }
 860
 861         return 0;
 862
 863 err_put:
 864         {
 865                 struct kobject *p, *t;
 866                 struct ib_port *port;
 867
 868                 list_for_each_entry_safe(p, t, &device->port_list, entry) {
 869                         list_del(&p->entry);
 870                         port = container_of(p, struct ib_port, kobj);
 871                         sysfs_remove_group(p, &pma_group);
 872                         sysfs_remove_group(p, &port->pkey_group);
 873                         sysfs_remove_group(p, &port->gid_group);
 874                         kobject_put(p);
 875                 }
 876         }
 877
 878         kobject_put(&class_dev->kobj);
 879
 880 err_unregister:
 881         device_unregister(class_dev);
 882
 883 err:
 884         return ret;
 885 }
 886
 887 void ib_device_unregister_sysfs(struct ib_device *device)
 888 {
 889         struct kobject *p, *t;
 890         struct ib_port *port;
 891
 892         /* Hold kobject until ib_dealloc_device() */
 893         kobject_get(&device->dev.kobj);
 894
 895         list_for_each_entry_safe(p, t, &device->port_list, entry) {
 896                 list_del(&p->entry);
 897                 port = container_of(p, struct ib_port, kobj);
 898                 sysfs_remove_group(p, &pma_group);
 899                 sysfs_remove_group(p, &port->pkey_group);
 900                 sysfs_remove_group(p, &port->gid_group);
 901                 kobject_put(p);
 902         }
 903
 904         kobject_put(device->ports_parent);
 905         device_unregister(&device->dev);
 906 }
 907
 908 int ib_sysfs_setup(void)
 909 {
 910         return class_register(&ib_class);
 911 }
 912
 913 void ib_sysfs_cleanup(void)
 914 {
 915         class_unregister(&ib_class);
 916 }