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