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         size_t mad_size = sizeof(*out_mad);
 330         u16 out_mad_pkey_index = 0;
 331         ssize_t ret;
 332
 333         if (!p->ibdev->process_mad)
 334                 return sprintf(buf, "N/A (no PMA)\n");
 335
 336         in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
 337         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 338         if (!in_mad || !out_mad) {
 339                 ret = -ENOMEM;
 340                 goto out;
 341         }
 342
 343         in_mad->mad_hdr.base_version  = 1;
 344         in_mad->mad_hdr.mgmt_class    = IB_MGMT_CLASS_PERF_MGMT;
 345         in_mad->mad_hdr.class_version = 1;
 346         in_mad->mad_hdr.method        = IB_MGMT_METHOD_GET;
 347         in_mad->mad_hdr.attr_id       = cpu_to_be16(0x12); /* PortCounters */
 348
 349         in_mad->data[41] = p->port_num; /* PortSelect field */
 350
 351         if ((p->ibdev->process_mad(p->ibdev, IB_MAD_IGNORE_MKEY,
 352                  p->port_num, NULL, NULL,
 353                  (const struct ib_mad_hdr *)in_mad, mad_size,
 354                  (struct ib_mad_hdr *)out_mad, &mad_size,
 355                  &out_mad_pkey_index) &
 356              (IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY)) !=
 357             (IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY)) {
 358                 ret = -EINVAL;
 359                 goto out;
 360         }
 361
 362         switch (width) {
 363         case 4:
 364                 ret = sprintf(buf, "%u\n", (out_mad->data[40 + offset / 8] >>
 365                                             (4 - (offset % 8))) & 0xf);
 366                 break;
 367         case 8:
 368                 ret = sprintf(buf, "%u\n", out_mad->data[40 + offset / 8]);
 369                 break;
 370         case 16:
 371                 ret = sprintf(buf, "%u\n",
 372                               be16_to_cpup((__be16 *)(out_mad->data + 40 + offset / 8)));
 373                 break;
 374         case 32:
 375                 ret = sprintf(buf, "%u\n",
 376                               be32_to_cpup((__be32 *)(out_mad->data + 40 + offset / 8)));
 377                 break;
 378         default:
 379                 ret = 0;
 380         }
 381
 382 out:
 383         kfree(in_mad);
 384         kfree(out_mad);
 385
 386         return ret;
 387 }
 388
 389 static PORT_PMA_ATTR(symbol_error                   ,  0, 16,  32);
 390 static PORT_PMA_ATTR(link_error_recovery            ,  1,  8,  48);
 391 static PORT_PMA_ATTR(link_downed                    ,  2,  8,  56);
 392 static PORT_PMA_ATTR(port_rcv_errors                ,  3, 16,  64);
 393 static PORT_PMA_ATTR(port_rcv_remote_physical_errors,  4, 16,  80);
 394 static PORT_PMA_ATTR(port_rcv_switch_relay_errors   ,  5, 16,  96);
 395 static PORT_PMA_ATTR(port_xmit_discards             ,  6, 16, 112);
 396 static PORT_PMA_ATTR(port_xmit_constraint_errors    ,  7,  8, 128);
 397 static PORT_PMA_ATTR(port_rcv_constraint_errors     ,  8,  8, 136);
 398 static PORT_PMA_ATTR(local_link_integrity_errors    ,  9,  4, 152);
 399 static PORT_PMA_ATTR(excessive_buffer_overrun_errors, 10,  4, 156);
 400 static PORT_PMA_ATTR(VL15_dropped                   , 11, 16, 176);
 401 static PORT_PMA_ATTR(port_xmit_data                 , 12, 32, 192);
 402 static PORT_PMA_ATTR(port_rcv_data                  , 13, 32, 224);
 403 static PORT_PMA_ATTR(port_xmit_packets              , 14, 32, 256);
 404 static PORT_PMA_ATTR(port_rcv_packets               , 15, 32, 288);
 405
 406 static struct attribute *pma_attrs[] = {
 407         &port_pma_attr_symbol_error.attr.attr,
 408         &port_pma_attr_link_error_recovery.attr.attr,
 409         &port_pma_attr_link_downed.attr.attr,
 410         &port_pma_attr_port_rcv_errors.attr.attr,
 411         &port_pma_attr_port_rcv_remote_physical_errors.attr.attr,
 412         &port_pma_attr_port_rcv_switch_relay_errors.attr.attr,
 413         &port_pma_attr_port_xmit_discards.attr.attr,
 414         &port_pma_attr_port_xmit_constraint_errors.attr.attr,
 415         &port_pma_attr_port_rcv_constraint_errors.attr.attr,
 416         &port_pma_attr_local_link_integrity_errors.attr.attr,
 417         &port_pma_attr_excessive_buffer_overrun_errors.attr.attr,
 418         &port_pma_attr_VL15_dropped.attr.attr,
 419         &port_pma_attr_port_xmit_data.attr.attr,
 420         &port_pma_attr_port_rcv_data.attr.attr,
 421         &port_pma_attr_port_xmit_packets.attr.attr,
 422         &port_pma_attr_port_rcv_packets.attr.attr,
 423         NULL
 424 };
 425
 426 static struct attribute_group pma_group = {
 427         .name  = "counters",
 428         .attrs  = pma_attrs
 429 };
 430
 431 static void ib_port_release(struct kobject *kobj)
 432 {
 433         struct ib_port *p = container_of(kobj, struct ib_port, kobj);
 434         struct attribute *a;
 435         int i;
 436
 437         if (p->gid_group.attrs) {
 438                 for (i = 0; (a = p->gid_group.attrs[i]); ++i)
 439                         kfree(a);
 440
 441                 kfree(p->gid_group.attrs);
 442         }
 443
 444         if (p->pkey_group.attrs) {
 445                 for (i = 0; (a = p->pkey_group.attrs[i]); ++i)
 446                         kfree(a);
 447
 448                 kfree(p->pkey_group.attrs);
 449         }
 450
 451         kfree(p);
 452 }
 453
 454 static struct kobj_type port_type = {
 455         .release       = ib_port_release,
 456         .sysfs_ops     = &port_sysfs_ops,
 457         .default_attrs = port_default_attrs
 458 };
 459
 460 static void ib_device_release(struct device *device)
 461 {
 462         struct ib_device *dev = container_of(device, struct ib_device, dev);
 463
 464         kfree(dev->port_immutable);
 465         kfree(dev);
 466 }
 467
 468 static int ib_device_uevent(struct device *device,
 469                             struct kobj_uevent_env *env)
 470 {
 471         struct ib_device *dev = container_of(device, struct ib_device, dev);
 472
 473         if (add_uevent_var(env, "NAME=%s", dev->name))
 474                 return -ENOMEM;
 475
 476         /*
 477          * It would be nice to pass the node GUID with the event...
 478          */
 479
 480         return 0;
 481 }
 482
 483 static struct attribute **
 484 alloc_group_attrs(ssize_t (*show)(struct ib_port *,
 485                                   struct port_attribute *, char *buf),
 486                   int len)
 487 {
 488         struct attribute **tab_attr;
 489         struct port_table_attribute *element;
 490         int i;
 491
 492         tab_attr = kcalloc(1 + len, sizeof(struct attribute *), GFP_KERNEL);
 493         if (!tab_attr)
 494                 return NULL;
 495
 496         for (i = 0; i < len; i++) {
 497                 element = kzalloc(sizeof(struct port_table_attribute),
 498                                   GFP_KERNEL);
 499                 if (!element)
 500                         goto err;
 501
 502                 if (snprintf(element->name, sizeof(element->name),
 503                              "%d", i) >= sizeof(element->name)) {
 504                         kfree(element);
 505                         goto err;
 506                 }
 507
 508                 element->attr.attr.name  = element->name;
 509                 element->attr.attr.mode  = S_IRUGO;
 510                 element->attr.show       = show;
 511                 element->index           = i;
 512                 sysfs_attr_init(&element->attr.attr);
 513
 514                 tab_attr[i] = &element->attr.attr;
 515         }
 516
 517         return tab_attr;
 518
 519 err:
 520         while (--i >= 0)
 521                 kfree(tab_attr[i]);
 522         kfree(tab_attr);
 523         return NULL;
 524 }
 525
 526 static int add_port(struct ib_device *device, int port_num,
 527                     int (*port_callback)(struct ib_device *,
 528                                          u8, struct kobject *))
 529 {
 530         struct ib_port *p;
 531         struct ib_port_attr attr;
 532         int i;
 533         int ret;
 534
 535         ret = ib_query_port(device, port_num, &attr);
 536         if (ret)
 537                 return ret;
 538
 539         p = kzalloc(sizeof *p, GFP_KERNEL);
 540         if (!p)
 541                 return -ENOMEM;
 542
 543         p->ibdev      = device;
 544         p->port_num   = port_num;
 545
 546         ret = kobject_init_and_add(&p->kobj, &port_type,
 547                                    device->ports_parent,
 548                                    "%d", port_num);
 549         if (ret) {
 550                 kfree(p);
 551                 return ret;
 552         }
 553
 554         ret = sysfs_create_group(&p->kobj, &pma_group);
 555         if (ret)
 556                 goto err_put;
 557
 558         p->gid_group.name  = "gids";
 559         p->gid_group.attrs = alloc_group_attrs(show_port_gid, attr.gid_tbl_len);
 560         if (!p->gid_group.attrs) {
 561                 ret = -ENOMEM;
 562                 goto err_remove_pma;
 563         }
 564
 565         ret = sysfs_create_group(&p->kobj, &p->gid_group);
 566         if (ret)
 567                 goto err_free_gid;
 568
 569         p->pkey_group.name  = "pkeys";
 570         p->pkey_group.attrs = alloc_group_attrs(show_port_pkey,
 571                                                 attr.pkey_tbl_len);
 572         if (!p->pkey_group.attrs) {
 573                 ret = -ENOMEM;
 574                 goto err_remove_gid;
 575         }
 576
 577         ret = sysfs_create_group(&p->kobj, &p->pkey_group);
 578         if (ret)
 579                 goto err_free_pkey;
 580
 581         if (port_callback) {
 582                 ret = port_callback(device, port_num, &p->kobj);
 583                 if (ret)
 584                         goto err_remove_pkey;
 585         }
 586
 587         list_add_tail(&p->kobj.entry, &device->port_list);
 588
 589         kobject_uevent(&p->kobj, KOBJ_ADD);
 590         return 0;
 591
 592 err_remove_pkey:
 593         sysfs_remove_group(&p->kobj, &p->pkey_group);
 594
 595 err_free_pkey:
 596         for (i = 0; i < attr.pkey_tbl_len; ++i)
 597                 kfree(p->pkey_group.attrs[i]);
 598
 599         kfree(p->pkey_group.attrs);
 600         p->pkey_group.attrs = NULL;
 601
 602 err_remove_gid:
 603         sysfs_remove_group(&p->kobj, &p->gid_group);
 604
 605 err_free_gid:
 606         for (i = 0; i < attr.gid_tbl_len; ++i)
 607                 kfree(p->gid_group.attrs[i]);
 608
 609         kfree(p->gid_group.attrs);
 610         p->gid_group.attrs = NULL;
 611
 612 err_remove_pma:
 613         sysfs_remove_group(&p->kobj, &pma_group);
 614
 615 err_put:
 616         kobject_put(&p->kobj);
 617         return ret;
 618 }
 619
 620 static ssize_t show_node_type(struct device *device,
 621                               struct device_attribute *attr, char *buf)
 622 {
 623         struct ib_device *dev = container_of(device, struct ib_device, dev);
 624
 625         switch (dev->node_type) {
 626         case RDMA_NODE_IB_CA:     return sprintf(buf, "%d: CA\n", dev->node_type);
 627         case RDMA_NODE_RNIC:      return sprintf(buf, "%d: RNIC\n", dev->node_type);
 628         case RDMA_NODE_USNIC:     return sprintf(buf, "%d: usNIC\n", dev->node_type);
 629         case RDMA_NODE_USNIC_UDP: return sprintf(buf, "%d: usNIC UDP\n", dev->node_type);
 630         case RDMA_NODE_IB_SWITCH: return sprintf(buf, "%d: switch\n", dev->node_type);
 631         case RDMA_NODE_IB_ROUTER: return sprintf(buf, "%d: router\n", dev->node_type);
 632         default:                  return sprintf(buf, "%d: <unknown>\n", dev->node_type);
 633         }
 634 }
 635
 636 static ssize_t show_sys_image_guid(struct device *device,
 637                                    struct device_attribute *dev_attr, char *buf)
 638 {
 639         struct ib_device *dev = container_of(device, struct ib_device, dev);
 640         struct ib_device_attr attr;
 641         ssize_t ret;
 642
 643         ret = ib_query_device(dev, &attr);
 644         if (ret)
 645                 return ret;
 646
 647         return sprintf(buf, "%04x:%04x:%04x:%04x\n",
 648                        be16_to_cpu(((__be16 *) &attr.sys_image_guid)[0]),
 649                        be16_to_cpu(((__be16 *) &attr.sys_image_guid)[1]),
 650                        be16_to_cpu(((__be16 *) &attr.sys_image_guid)[2]),
 651                        be16_to_cpu(((__be16 *) &attr.sys_image_guid)[3]));
 652 }
 653
 654 static ssize_t show_node_guid(struct device *device,
 655                               struct device_attribute *attr, char *buf)
 656 {
 657         struct ib_device *dev = container_of(device, struct ib_device, dev);
 658
 659         return sprintf(buf, "%04x:%04x:%04x:%04x\n",
 660                        be16_to_cpu(((__be16 *) &dev->node_guid)[0]),
 661                        be16_to_cpu(((__be16 *) &dev->node_guid)[1]),
 662                        be16_to_cpu(((__be16 *) &dev->node_guid)[2]),
 663                        be16_to_cpu(((__be16 *) &dev->node_guid)[3]));
 664 }
 665
 666 static ssize_t show_node_desc(struct device *device,
 667                               struct device_attribute *attr, char *buf)
 668 {
 669         struct ib_device *dev = container_of(device, struct ib_device, dev);
 670
 671         return sprintf(buf, "%.64s\n", dev->node_desc);
 672 }
 673
 674 static ssize_t set_node_desc(struct device *device,
 675                              struct device_attribute *attr,
 676                              const char *buf, size_t count)
 677 {
 678         struct ib_device *dev = container_of(device, struct ib_device, dev);
 679         struct ib_device_modify desc = {};
 680         int ret;
 681
 682         if (!dev->modify_device)
 683                 return -EIO;
 684
 685         memcpy(desc.node_desc, buf, min_t(int, count, 64));
 686         ret = ib_modify_device(dev, IB_DEVICE_MODIFY_NODE_DESC, &desc);
 687         if (ret)
 688                 return ret;
 689
 690         return count;
 691 }
 692
 693 static DEVICE_ATTR(node_type, S_IRUGO, show_node_type, NULL);
 694 static DEVICE_ATTR(sys_image_guid, S_IRUGO, show_sys_image_guid, NULL);
 695 static DEVICE_ATTR(node_guid, S_IRUGO, show_node_guid, NULL);
 696 static DEVICE_ATTR(node_desc, S_IRUGO | S_IWUSR, show_node_desc, set_node_desc);
 697
 698 static struct device_attribute *ib_class_attributes[] = {
 699         &dev_attr_node_type,
 700         &dev_attr_sys_image_guid,
 701         &dev_attr_node_guid,
 702         &dev_attr_node_desc
 703 };
 704
 705 static struct class ib_class = {
 706         .name    = "infiniband",
 707         .dev_release = ib_device_release,
 708         .dev_uevent = ib_device_uevent,
 709 };
 710
 711 /* Show a given an attribute in the statistics group */
 712 static ssize_t show_protocol_stat(const struct device *device,
 713                             struct device_attribute *attr, char *buf,
 714                             unsigned offset)
 715 {
 716         struct ib_device *dev = container_of(device, struct ib_device, dev);
 717         union rdma_protocol_stats stats;
 718         ssize_t ret;
 719
 720         ret = dev->get_protocol_stats(dev, &stats);
 721         if (ret)
 722                 return ret;
 723
 724         return sprintf(buf, "%llu\n",
 725                        (unsigned long long) ((u64 *) &stats)[offset]);
 726 }
 727
 728 /* generate a read-only iwarp statistics attribute */
 729 #define IW_STATS_ENTRY(name)                                            \
 730 static ssize_t show_##name(struct device *device,                       \
 731                            struct device_attribute *attr, char *buf)    \
 732 {                                                                       \
 733         return show_protocol_stat(device, attr, buf,                    \
 734                                   offsetof(struct iw_protocol_stats, name) / \
 735                                   sizeof (u64));                        \
 736 }                                                                       \
 737 static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL)
 738
 739 IW_STATS_ENTRY(ipInReceives);
 740 IW_STATS_ENTRY(ipInHdrErrors);
 741 IW_STATS_ENTRY(ipInTooBigErrors);
 742 IW_STATS_ENTRY(ipInNoRoutes);
 743 IW_STATS_ENTRY(ipInAddrErrors);
 744 IW_STATS_ENTRY(ipInUnknownProtos);
 745 IW_STATS_ENTRY(ipInTruncatedPkts);
 746 IW_STATS_ENTRY(ipInDiscards);
 747 IW_STATS_ENTRY(ipInDelivers);
 748 IW_STATS_ENTRY(ipOutForwDatagrams);
 749 IW_STATS_ENTRY(ipOutRequests);
 750 IW_STATS_ENTRY(ipOutDiscards);
 751 IW_STATS_ENTRY(ipOutNoRoutes);
 752 IW_STATS_ENTRY(ipReasmTimeout);
 753 IW_STATS_ENTRY(ipReasmReqds);
 754 IW_STATS_ENTRY(ipReasmOKs);
 755 IW_STATS_ENTRY(ipReasmFails);
 756 IW_STATS_ENTRY(ipFragOKs);
 757 IW_STATS_ENTRY(ipFragFails);
 758 IW_STATS_ENTRY(ipFragCreates);
 759 IW_STATS_ENTRY(ipInMcastPkts);
 760 IW_STATS_ENTRY(ipOutMcastPkts);
 761 IW_STATS_ENTRY(ipInBcastPkts);
 762 IW_STATS_ENTRY(ipOutBcastPkts);
 763 IW_STATS_ENTRY(tcpRtoAlgorithm);
 764 IW_STATS_ENTRY(tcpRtoMin);
 765 IW_STATS_ENTRY(tcpRtoMax);
 766 IW_STATS_ENTRY(tcpMaxConn);
 767 IW_STATS_ENTRY(tcpActiveOpens);
 768 IW_STATS_ENTRY(tcpPassiveOpens);
 769 IW_STATS_ENTRY(tcpAttemptFails);
 770 IW_STATS_ENTRY(tcpEstabResets);
 771 IW_STATS_ENTRY(tcpCurrEstab);
 772 IW_STATS_ENTRY(tcpInSegs);
 773 IW_STATS_ENTRY(tcpOutSegs);
 774 IW_STATS_ENTRY(tcpRetransSegs);
 775 IW_STATS_ENTRY(tcpInErrs);
 776 IW_STATS_ENTRY(tcpOutRsts);
 777
 778 static struct attribute *iw_proto_stats_attrs[] = {
 779         &dev_attr_ipInReceives.attr,
 780         &dev_attr_ipInHdrErrors.attr,
 781         &dev_attr_ipInTooBigErrors.attr,
 782         &dev_attr_ipInNoRoutes.attr,
 783         &dev_attr_ipInAddrErrors.attr,
 784         &dev_attr_ipInUnknownProtos.attr,
 785         &dev_attr_ipInTruncatedPkts.attr,
 786         &dev_attr_ipInDiscards.attr,
 787         &dev_attr_ipInDelivers.attr,
 788         &dev_attr_ipOutForwDatagrams.attr,
 789         &dev_attr_ipOutRequests.attr,
 790         &dev_attr_ipOutDiscards.attr,
 791         &dev_attr_ipOutNoRoutes.attr,
 792         &dev_attr_ipReasmTimeout.attr,
 793         &dev_attr_ipReasmReqds.attr,
 794         &dev_attr_ipReasmOKs.attr,
 795         &dev_attr_ipReasmFails.attr,
 796         &dev_attr_ipFragOKs.attr,
 797         &dev_attr_ipFragFails.attr,
 798         &dev_attr_ipFragCreates.attr,
 799         &dev_attr_ipInMcastPkts.attr,
 800         &dev_attr_ipOutMcastPkts.attr,
 801         &dev_attr_ipInBcastPkts.attr,
 802         &dev_attr_ipOutBcastPkts.attr,
 803         &dev_attr_tcpRtoAlgorithm.attr,
 804         &dev_attr_tcpRtoMin.attr,
 805         &dev_attr_tcpRtoMax.attr,
 806         &dev_attr_tcpMaxConn.attr,
 807         &dev_attr_tcpActiveOpens.attr,
 808         &dev_attr_tcpPassiveOpens.attr,
 809         &dev_attr_tcpAttemptFails.attr,
 810         &dev_attr_tcpEstabResets.attr,
 811         &dev_attr_tcpCurrEstab.attr,
 812         &dev_attr_tcpInSegs.attr,
 813         &dev_attr_tcpOutSegs.attr,
 814         &dev_attr_tcpRetransSegs.attr,
 815         &dev_attr_tcpInErrs.attr,
 816         &dev_attr_tcpOutRsts.attr,
 817         NULL
 818 };
 819
 820 static struct attribute_group iw_stats_group = {
 821         .name   = "proto_stats",
 822         .attrs  = iw_proto_stats_attrs,
 823 };
 824
 825 static void free_port_list_attributes(struct ib_device *device)
 826 {
 827         struct kobject *p, *t;
 828
 829         list_for_each_entry_safe(p, t, &device->port_list, entry) {
 830                 struct ib_port *port = container_of(p, struct ib_port, kobj);
 831                 list_del(&p->entry);
 832                 sysfs_remove_group(p, &pma_group);
 833                 sysfs_remove_group(p, &port->pkey_group);
 834                 sysfs_remove_group(p, &port->gid_group);
 835                 kobject_put(p);
 836         }
 837
 838         kobject_put(device->ports_parent);
 839 }
 840
 841 int ib_device_register_sysfs(struct ib_device *device,
 842                              int (*port_callback)(struct ib_device *,
 843                                                   u8, struct kobject *))
 844 {
 845         struct device *class_dev = &device->dev;
 846         int ret;
 847         int i;
 848
 849         class_dev->class      = &ib_class;
 850         class_dev->parent     = device->dma_device;
 851         dev_set_name(class_dev, "%s", device->name);
 852         dev_set_drvdata(class_dev, device);
 853
 854         INIT_LIST_HEAD(&device->port_list);
 855
 856         ret = device_register(class_dev);
 857         if (ret)
 858                 goto err;
 859
 860         for (i = 0; i < ARRAY_SIZE(ib_class_attributes); ++i) {
 861                 ret = device_create_file(class_dev, ib_class_attributes[i]);
 862                 if (ret)
 863                         goto err_unregister;
 864         }
 865
 866         device->ports_parent = kobject_create_and_add("ports",
 867                                                       &class_dev->kobj);
 868         if (!device->ports_parent) {
 869                 ret = -ENOMEM;
 870                 goto err_put;
 871         }
 872
 873         if (device->node_type == RDMA_NODE_IB_SWITCH) {
 874                 ret = add_port(device, 0, port_callback);
 875                 if (ret)
 876                         goto err_put;
 877         } else {
 878                 for (i = 1; i <= device->phys_port_cnt; ++i) {
 879                         ret = add_port(device, i, port_callback);
 880                         if (ret)
 881                                 goto err_put;
 882                 }
 883         }
 884
 885         if (device->node_type == RDMA_NODE_RNIC && device->get_protocol_stats) {
 886                 ret = sysfs_create_group(&class_dev->kobj, &iw_stats_group);
 887                 if (ret)
 888                         goto err_put;
 889         }
 890
 891         return 0;
 892
 893 err_put:
 894         free_port_list_attributes(device);
 895
 896 err_unregister:
 897         device_unregister(class_dev);
 898
 899 err:
 900         return ret;
 901 }
 902
 903 void ib_device_unregister_sysfs(struct ib_device *device)
 904 {
 905         /* Hold kobject until ib_dealloc_device() */
 906         struct kobject *kobj_dev = kobject_get(&device->dev.kobj);
 907         int i;
 908
 909         if (device->node_type == RDMA_NODE_RNIC && device->get_protocol_stats)
 910                 sysfs_remove_group(kobj_dev, &iw_stats_group);
 911
 912         free_port_list_attributes(device);
 913
 914         for (i = 0; i < ARRAY_SIZE(ib_class_attributes); ++i)
 915                 device_remove_file(&device->dev, ib_class_attributes[i]);
 916
 917         device_unregister(&device->dev);
 918 }
 919
 920 int ib_sysfs_setup(void)
 921 {
 922         return class_register(&ib_class);
 923 }
 924
 925 void ib_sysfs_cleanup(void)
 926 {
 927         class_unregister(&ib_class);
 928 }