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 PORT_ATTR_RO(state);
 226 static PORT_ATTR_RO(lid);
 227 static PORT_ATTR_RO(lid_mask_count);
 228 static PORT_ATTR_RO(sm_lid);
 229 static PORT_ATTR_RO(sm_sl);
 230 static PORT_ATTR_RO(cap_mask);
 231 static PORT_ATTR_RO(rate);
 232 static PORT_ATTR_RO(phys_state);
 233
 234 static struct attribute *port_default_attrs[] = {
 235         &port_attr_state.attr,
 236         &port_attr_lid.attr,
 237         &port_attr_lid_mask_count.attr,
 238         &port_attr_sm_lid.attr,
 239         &port_attr_sm_sl.attr,
 240         &port_attr_cap_mask.attr,
 241         &port_attr_rate.attr,
 242         &port_attr_phys_state.attr,
 243         NULL
 244 };
 245
 246 static ssize_t show_port_gid(struct ib_port *p, struct port_attribute *attr,
 247                              char *buf)
 248 {
 249         struct port_table_attribute *tab_attr =
 250                 container_of(attr, struct port_table_attribute, attr);
 251         union ib_gid gid;
 252         ssize_t ret;
 253
 254         ret = ib_query_gid(p->ibdev, p->port_num, tab_attr->index, &gid);
 255         if (ret)
 256                 return ret;
 257
 258         return sprintf(buf, "%pI6\n", gid.raw);
 259 }
 260
 261 static ssize_t show_port_pkey(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         u16 pkey;
 267         ssize_t ret;
 268
 269         ret = ib_query_pkey(p->ibdev, p->port_num, tab_attr->index, &pkey);
 270         if (ret)
 271                 return ret;
 272
 273         return sprintf(buf, "0x%04x\n", pkey);
 274 }
 275
 276 #define PORT_PMA_ATTR(_name, _counter, _width, _offset)                 \
 277 struct port_table_attribute port_pma_attr_##_name = {                   \
 278         .attr  = __ATTR(_name, S_IRUGO, show_pma_counter, NULL),        \
 279         .index = (_offset) | ((_width) << 16) | ((_counter) << 24)      \
 280 }
 281
 282 static ssize_t show_pma_counter(struct ib_port *p, struct port_attribute *attr,
 283                                 char *buf)
 284 {
 285         struct port_table_attribute *tab_attr =
 286                 container_of(attr, struct port_table_attribute, attr);
 287         int offset = tab_attr->index & 0xffff;
 288         int width  = (tab_attr->index >> 16) & 0xff;
 289         struct ib_mad *in_mad  = NULL;
 290         struct ib_mad *out_mad = NULL;
 291         ssize_t ret;
 292
 293         if (!p->ibdev->process_mad)
 294                 return sprintf(buf, "N/A (no PMA)\n");
 295
 296         in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
 297         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 298         if (!in_mad || !out_mad) {
 299                 ret = -ENOMEM;
 300                 goto out;
 301         }
 302
 303         in_mad->mad_hdr.base_version  = 1;
 304         in_mad->mad_hdr.mgmt_class    = IB_MGMT_CLASS_PERF_MGMT;
 305         in_mad->mad_hdr.class_version = 1;
 306         in_mad->mad_hdr.method        = IB_MGMT_METHOD_GET;
 307         in_mad->mad_hdr.attr_id       = cpu_to_be16(0x12); /* PortCounters */
 308
 309         in_mad->data[41] = p->port_num; /* PortSelect field */
 310
 311         if ((p->ibdev->process_mad(p->ibdev, IB_MAD_IGNORE_MKEY,
 312                  p->port_num, NULL, NULL, in_mad, out_mad) &
 313              (IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY)) !=
 314             (IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY)) {
 315                 ret = -EINVAL;
 316                 goto out;
 317         }
 318
 319         switch (width) {
 320         case 4:
 321                 ret = sprintf(buf, "%u\n", (out_mad->data[40 + offset / 8] >>
 322                                             (4 - (offset % 8))) & 0xf);
 323                 break;
 324         case 8:
 325                 ret = sprintf(buf, "%u\n", out_mad->data[40 + offset / 8]);
 326                 break;
 327         case 16:
 328                 ret = sprintf(buf, "%u\n",
 329                               be16_to_cpup((__be16 *)(out_mad->data + 40 + offset / 8)));
 330                 break;
 331         case 32:
 332                 ret = sprintf(buf, "%u\n",
 333                               be32_to_cpup((__be32 *)(out_mad->data + 40 + offset / 8)));
 334                 break;
 335         default:
 336                 ret = 0;
 337         }
 338
 339 out:
 340         kfree(in_mad);
 341         kfree(out_mad);
 342
 343         return ret;
 344 }
 345
 346 static PORT_PMA_ATTR(symbol_error                   ,  0, 16,  32);
 347 static PORT_PMA_ATTR(link_error_recovery            ,  1,  8,  48);
 348 static PORT_PMA_ATTR(link_downed                    ,  2,  8,  56);
 349 static PORT_PMA_ATTR(port_rcv_errors                ,  3, 16,  64);
 350 static PORT_PMA_ATTR(port_rcv_remote_physical_errors,  4, 16,  80);
 351 static PORT_PMA_ATTR(port_rcv_switch_relay_errors   ,  5, 16,  96);
 352 static PORT_PMA_ATTR(port_xmit_discards             ,  6, 16, 112);
 353 static PORT_PMA_ATTR(port_xmit_constraint_errors    ,  7,  8, 128);
 354 static PORT_PMA_ATTR(port_rcv_constraint_errors     ,  8,  8, 136);
 355 static PORT_PMA_ATTR(local_link_integrity_errors    ,  9,  4, 152);
 356 static PORT_PMA_ATTR(excessive_buffer_overrun_errors, 10,  4, 156);
 357 static PORT_PMA_ATTR(VL15_dropped                   , 11, 16, 176);
 358 static PORT_PMA_ATTR(port_xmit_data                 , 12, 32, 192);
 359 static PORT_PMA_ATTR(port_rcv_data                  , 13, 32, 224);
 360 static PORT_PMA_ATTR(port_xmit_packets              , 14, 32, 256);
 361 static PORT_PMA_ATTR(port_rcv_packets               , 15, 32, 288);
 362
 363 static struct attribute *pma_attrs[] = {
 364         &port_pma_attr_symbol_error.attr.attr,
 365         &port_pma_attr_link_error_recovery.attr.attr,
 366         &port_pma_attr_link_downed.attr.attr,
 367         &port_pma_attr_port_rcv_errors.attr.attr,
 368         &port_pma_attr_port_rcv_remote_physical_errors.attr.attr,
 369         &port_pma_attr_port_rcv_switch_relay_errors.attr.attr,
 370         &port_pma_attr_port_xmit_discards.attr.attr,
 371         &port_pma_attr_port_xmit_constraint_errors.attr.attr,
 372         &port_pma_attr_port_rcv_constraint_errors.attr.attr,
 373         &port_pma_attr_local_link_integrity_errors.attr.attr,
 374         &port_pma_attr_excessive_buffer_overrun_errors.attr.attr,
 375         &port_pma_attr_VL15_dropped.attr.attr,
 376         &port_pma_attr_port_xmit_data.attr.attr,
 377         &port_pma_attr_port_rcv_data.attr.attr,
 378         &port_pma_attr_port_xmit_packets.attr.attr,
 379         &port_pma_attr_port_rcv_packets.attr.attr,
 380         NULL
 381 };
 382
 383 static struct attribute_group pma_group = {
 384         .name  = "counters",
 385         .attrs  = pma_attrs
 386 };
 387
 388 static void ib_port_release(struct kobject *kobj)
 389 {
 390         struct ib_port *p = container_of(kobj, struct ib_port, kobj);
 391         struct attribute *a;
 392         int i;
 393
 394         for (i = 0; (a = p->gid_group.attrs[i]); ++i)
 395                 kfree(a);
 396
 397         kfree(p->gid_group.attrs);
 398
 399         for (i = 0; (a = p->pkey_group.attrs[i]); ++i)
 400                 kfree(a);
 401
 402         kfree(p->pkey_group.attrs);
 403
 404         kfree(p);
 405 }
 406
 407 static struct kobj_type port_type = {
 408         .release       = ib_port_release,
 409         .sysfs_ops     = &port_sysfs_ops,
 410         .default_attrs = port_default_attrs
 411 };
 412
 413 static void ib_device_release(struct device *device)
 414 {
 415         struct ib_device *dev = container_of(device, struct ib_device, dev);
 416
 417         kfree(dev);
 418 }
 419
 420 static int ib_device_uevent(struct device *device,
 421                             struct kobj_uevent_env *env)
 422 {
 423         struct ib_device *dev = container_of(device, struct ib_device, dev);
 424
 425         if (add_uevent_var(env, "NAME=%s", dev->name))
 426                 return -ENOMEM;
 427
 428         /*
 429          * It would be nice to pass the node GUID with the event...
 430          */
 431
 432         return 0;
 433 }
 434
 435 static struct attribute **
 436 alloc_group_attrs(ssize_t (*show)(struct ib_port *,
 437                                   struct port_attribute *, char *buf),
 438                   int len)
 439 {
 440         struct attribute **tab_attr;
 441         struct port_table_attribute *element;
 442         int i;
 443
 444         tab_attr = kcalloc(1 + len, sizeof(struct attribute *), GFP_KERNEL);
 445         if (!tab_attr)
 446                 return NULL;
 447
 448         for (i = 0; i < len; i++) {
 449                 element = kzalloc(sizeof(struct port_table_attribute),
 450                                   GFP_KERNEL);
 451                 if (!element)
 452                         goto err;
 453
 454                 if (snprintf(element->name, sizeof(element->name),
 455                              "%d", i) >= sizeof(element->name)) {
 456                         kfree(element);
 457                         goto err;
 458                 }
 459
 460                 element->attr.attr.name  = element->name;
 461                 element->attr.attr.mode  = S_IRUGO;
 462                 element->attr.show       = show;
 463                 element->index           = i;
 464                 sysfs_attr_init(&element->attr.attr);
 465
 466                 tab_attr[i] = &element->attr.attr;
 467         }
 468
 469         return tab_attr;
 470
 471 err:
 472         while (--i >= 0)
 473                 kfree(tab_attr[i]);
 474         kfree(tab_attr);
 475         return NULL;
 476 }
 477
 478 static int add_port(struct ib_device *device, int port_num)
 479 {
 480         struct ib_port *p;
 481         struct ib_port_attr attr;
 482         int i;
 483         int ret;
 484
 485         ret = ib_query_port(device, port_num, &attr);
 486         if (ret)
 487                 return ret;
 488
 489         p = kzalloc(sizeof *p, GFP_KERNEL);
 490         if (!p)
 491                 return -ENOMEM;
 492
 493         p->ibdev      = device;
 494         p->port_num   = port_num;
 495
 496         ret = kobject_init_and_add(&p->kobj, &port_type,
 497                                    kobject_get(device->ports_parent),
 498                                    "%d", port_num);
 499         if (ret)
 500                 goto err_put;
 501
 502         ret = sysfs_create_group(&p->kobj, &pma_group);
 503         if (ret)
 504                 goto err_put;
 505
 506         p->gid_group.name  = "gids";
 507         p->gid_group.attrs = alloc_group_attrs(show_port_gid, attr.gid_tbl_len);
 508         if (!p->gid_group.attrs)
 509                 goto err_remove_pma;
 510
 511         ret = sysfs_create_group(&p->kobj, &p->gid_group);
 512         if (ret)
 513                 goto err_free_gid;
 514
 515         p->pkey_group.name  = "pkeys";
 516         p->pkey_group.attrs = alloc_group_attrs(show_port_pkey,
 517                                                 attr.pkey_tbl_len);
 518         if (!p->pkey_group.attrs)
 519                 goto err_remove_gid;
 520
 521         ret = sysfs_create_group(&p->kobj, &p->pkey_group);
 522         if (ret)
 523                 goto err_free_pkey;
 524
 525         list_add_tail(&p->kobj.entry, &device->port_list);
 526
 527         kobject_uevent(&p->kobj, KOBJ_ADD);
 528         return 0;
 529
 530 err_free_pkey:
 531         for (i = 0; i < attr.pkey_tbl_len; ++i)
 532                 kfree(p->pkey_group.attrs[i]);
 533
 534         kfree(p->pkey_group.attrs);
 535
 536 err_remove_gid:
 537         sysfs_remove_group(&p->kobj, &p->gid_group);
 538
 539 err_free_gid:
 540         for (i = 0; i < attr.gid_tbl_len; ++i)
 541                 kfree(p->gid_group.attrs[i]);
 542
 543         kfree(p->gid_group.attrs);
 544
 545 err_remove_pma:
 546         sysfs_remove_group(&p->kobj, &pma_group);
 547
 548 err_put:
 549         kobject_put(device->ports_parent);
 550         kfree(p);
 551         return ret;
 552 }
 553
 554 static ssize_t show_node_type(struct device *device,
 555                               struct device_attribute *attr, char *buf)
 556 {
 557         struct ib_device *dev = container_of(device, struct ib_device, dev);
 558
 559         switch (dev->node_type) {
 560         case RDMA_NODE_IB_CA:     return sprintf(buf, "%d: CA\n", dev->node_type);
 561         case RDMA_NODE_RNIC:      return sprintf(buf, "%d: RNIC\n", dev->node_type);
 562         case RDMA_NODE_IB_SWITCH: return sprintf(buf, "%d: switch\n", dev->node_type);
 563         case RDMA_NODE_IB_ROUTER: return sprintf(buf, "%d: router\n", dev->node_type);
 564         default:                  return sprintf(buf, "%d: <unknown>\n", dev->node_type);
 565         }
 566 }
 567
 568 static ssize_t show_sys_image_guid(struct device *device,
 569                                    struct device_attribute *dev_attr, char *buf)
 570 {
 571         struct ib_device *dev = container_of(device, struct ib_device, dev);
 572         struct ib_device_attr attr;
 573         ssize_t ret;
 574
 575         ret = ib_query_device(dev, &attr);
 576         if (ret)
 577                 return ret;
 578
 579         return sprintf(buf, "%04x:%04x:%04x:%04x\n",
 580                        be16_to_cpu(((__be16 *) &attr.sys_image_guid)[0]),
 581                        be16_to_cpu(((__be16 *) &attr.sys_image_guid)[1]),
 582                        be16_to_cpu(((__be16 *) &attr.sys_image_guid)[2]),
 583                        be16_to_cpu(((__be16 *) &attr.sys_image_guid)[3]));
 584 }
 585
 586 static ssize_t show_node_guid(struct device *device,
 587                               struct device_attribute *attr, char *buf)
 588 {
 589         struct ib_device *dev = container_of(device, struct ib_device, dev);
 590
 591         return sprintf(buf, "%04x:%04x:%04x:%04x\n",
 592                        be16_to_cpu(((__be16 *) &dev->node_guid)[0]),
 593                        be16_to_cpu(((__be16 *) &dev->node_guid)[1]),
 594                        be16_to_cpu(((__be16 *) &dev->node_guid)[2]),
 595                        be16_to_cpu(((__be16 *) &dev->node_guid)[3]));
 596 }
 597
 598 static ssize_t show_node_desc(struct device *device,
 599                               struct device_attribute *attr, char *buf)
 600 {
 601         struct ib_device *dev = container_of(device, struct ib_device, dev);
 602
 603         return sprintf(buf, "%.64s\n", dev->node_desc);
 604 }
 605
 606 static ssize_t set_node_desc(struct device *device,
 607                              struct device_attribute *attr,
 608                              const char *buf, size_t count)
 609 {
 610         struct ib_device *dev = container_of(device, struct ib_device, dev);
 611         struct ib_device_modify desc = {};
 612         int ret;
 613
 614         if (!dev->modify_device)
 615                 return -EIO;
 616
 617         memcpy(desc.node_desc, buf, min_t(int, count, 64));
 618         ret = ib_modify_device(dev, IB_DEVICE_MODIFY_NODE_DESC, &desc);
 619         if (ret)
 620                 return ret;
 621
 622         return count;
 623 }
 624
 625 static DEVICE_ATTR(node_type, S_IRUGO, show_node_type, NULL);
 626 static DEVICE_ATTR(sys_image_guid, S_IRUGO, show_sys_image_guid, NULL);
 627 static DEVICE_ATTR(node_guid, S_IRUGO, show_node_guid, NULL);
 628 static DEVICE_ATTR(node_desc, S_IRUGO | S_IWUSR, show_node_desc, set_node_desc);
 629
 630 static struct device_attribute *ib_class_attributes[] = {
 631         &dev_attr_node_type,
 632         &dev_attr_sys_image_guid,
 633         &dev_attr_node_guid,
 634         &dev_attr_node_desc
 635 };
 636
 637 static struct class ib_class = {
 638         .name    = "infiniband",
 639         .dev_release = ib_device_release,
 640         .dev_uevent = ib_device_uevent,
 641 };
 642
 643 /* Show a given an attribute in the statistics group */
 644 static ssize_t show_protocol_stat(const struct device *device,
 645                             struct device_attribute *attr, char *buf,
 646                             unsigned offset)
 647 {
 648         struct ib_device *dev = container_of(device, struct ib_device, dev);
 649         union rdma_protocol_stats stats;
 650         ssize_t ret;
 651
 652         ret = dev->get_protocol_stats(dev, &stats);
 653         if (ret)
 654                 return ret;
 655
 656         return sprintf(buf, "%llu\n",
 657                        (unsigned long long) ((u64 *) &stats)[offset]);
 658 }
 659
 660 /* generate a read-only iwarp statistics attribute */
 661 #define IW_STATS_ENTRY(name)                                            \
 662 static ssize_t show_##name(struct device *device,                       \
 663                            struct device_attribute *attr, char *buf)    \
 664 {                                                                       \
 665         return show_protocol_stat(device, attr, buf,                    \
 666                                   offsetof(struct iw_protocol_stats, name) / \
 667                                   sizeof (u64));                        \
 668 }                                                                       \
 669 static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL)
 670
 671 IW_STATS_ENTRY(ipInReceives);
 672 IW_STATS_ENTRY(ipInHdrErrors);
 673 IW_STATS_ENTRY(ipInTooBigErrors);
 674 IW_STATS_ENTRY(ipInNoRoutes);
 675 IW_STATS_ENTRY(ipInAddrErrors);
 676 IW_STATS_ENTRY(ipInUnknownProtos);
 677 IW_STATS_ENTRY(ipInTruncatedPkts);
 678 IW_STATS_ENTRY(ipInDiscards);
 679 IW_STATS_ENTRY(ipInDelivers);
 680 IW_STATS_ENTRY(ipOutForwDatagrams);
 681 IW_STATS_ENTRY(ipOutRequests);
 682 IW_STATS_ENTRY(ipOutDiscards);
 683 IW_STATS_ENTRY(ipOutNoRoutes);
 684 IW_STATS_ENTRY(ipReasmTimeout);
 685 IW_STATS_ENTRY(ipReasmReqds);
 686 IW_STATS_ENTRY(ipReasmOKs);
 687 IW_STATS_ENTRY(ipReasmFails);
 688 IW_STATS_ENTRY(ipFragOKs);
 689 IW_STATS_ENTRY(ipFragFails);
 690 IW_STATS_ENTRY(ipFragCreates);
 691 IW_STATS_ENTRY(ipInMcastPkts);
 692 IW_STATS_ENTRY(ipOutMcastPkts);
 693 IW_STATS_ENTRY(ipInBcastPkts);
 694 IW_STATS_ENTRY(ipOutBcastPkts);
 695 IW_STATS_ENTRY(tcpRtoAlgorithm);
 696 IW_STATS_ENTRY(tcpRtoMin);
 697 IW_STATS_ENTRY(tcpRtoMax);
 698 IW_STATS_ENTRY(tcpMaxConn);
 699 IW_STATS_ENTRY(tcpActiveOpens);
 700 IW_STATS_ENTRY(tcpPassiveOpens);
 701 IW_STATS_ENTRY(tcpAttemptFails);
 702 IW_STATS_ENTRY(tcpEstabResets);
 703 IW_STATS_ENTRY(tcpCurrEstab);
 704 IW_STATS_ENTRY(tcpInSegs);
 705 IW_STATS_ENTRY(tcpOutSegs);
 706 IW_STATS_ENTRY(tcpRetransSegs);
 707 IW_STATS_ENTRY(tcpInErrs);
 708 IW_STATS_ENTRY(tcpOutRsts);
 709
 710 static struct attribute *iw_proto_stats_attrs[] = {
 711         &dev_attr_ipInReceives.attr,
 712         &dev_attr_ipInHdrErrors.attr,
 713         &dev_attr_ipInTooBigErrors.attr,
 714         &dev_attr_ipInNoRoutes.attr,
 715         &dev_attr_ipInAddrErrors.attr,
 716         &dev_attr_ipInUnknownProtos.attr,
 717         &dev_attr_ipInTruncatedPkts.attr,
 718         &dev_attr_ipInDiscards.attr,
 719         &dev_attr_ipInDelivers.attr,
 720         &dev_attr_ipOutForwDatagrams.attr,
 721         &dev_attr_ipOutRequests.attr,
 722         &dev_attr_ipOutDiscards.attr,
 723         &dev_attr_ipOutNoRoutes.attr,
 724         &dev_attr_ipReasmTimeout.attr,
 725         &dev_attr_ipReasmReqds.attr,
 726         &dev_attr_ipReasmOKs.attr,
 727         &dev_attr_ipReasmFails.attr,
 728         &dev_attr_ipFragOKs.attr,
 729         &dev_attr_ipFragFails.attr,
 730         &dev_attr_ipFragCreates.attr,
 731         &dev_attr_ipInMcastPkts.attr,
 732         &dev_attr_ipOutMcastPkts.attr,
 733         &dev_attr_ipInBcastPkts.attr,
 734         &dev_attr_ipOutBcastPkts.attr,
 735         &dev_attr_tcpRtoAlgorithm.attr,
 736         &dev_attr_tcpRtoMin.attr,
 737         &dev_attr_tcpRtoMax.attr,
 738         &dev_attr_tcpMaxConn.attr,
 739         &dev_attr_tcpActiveOpens.attr,
 740         &dev_attr_tcpPassiveOpens.attr,
 741         &dev_attr_tcpAttemptFails.attr,
 742         &dev_attr_tcpEstabResets.attr,
 743         &dev_attr_tcpCurrEstab.attr,
 744         &dev_attr_tcpInSegs.attr,
 745         &dev_attr_tcpOutSegs.attr,
 746         &dev_attr_tcpRetransSegs.attr,
 747         &dev_attr_tcpInErrs.attr,
 748         &dev_attr_tcpOutRsts.attr,
 749         NULL
 750 };
 751
 752 static struct attribute_group iw_stats_group = {
 753         .name   = "proto_stats",
 754         .attrs  = iw_proto_stats_attrs,
 755 };
 756
 757 int ib_device_register_sysfs(struct ib_device *device)
 758 {
 759         struct device *class_dev = &device->dev;
 760         int ret;
 761         int i;
 762
 763         class_dev->class      = &ib_class;
 764         class_dev->parent     = device->dma_device;
 765         dev_set_name(class_dev, device->name);
 766         dev_set_drvdata(class_dev, device);
 767
 768         INIT_LIST_HEAD(&device->port_list);
 769
 770         ret = device_register(class_dev);
 771         if (ret)
 772                 goto err;
 773
 774         for (i = 0; i < ARRAY_SIZE(ib_class_attributes); ++i) {
 775                 ret = device_create_file(class_dev, ib_class_attributes[i]);
 776                 if (ret)
 777                         goto err_unregister;
 778         }
 779
 780         device->ports_parent = kobject_create_and_add("ports",
 781                                         kobject_get(&class_dev->kobj));
 782         if (!device->ports_parent) {
 783                 ret = -ENOMEM;
 784                 goto err_put;
 785         }
 786
 787         if (device->node_type == RDMA_NODE_IB_SWITCH) {
 788                 ret = add_port(device, 0);
 789                 if (ret)
 790                         goto err_put;
 791         } else {
 792                 for (i = 1; i <= device->phys_port_cnt; ++i) {
 793                         ret = add_port(device, i);
 794                         if (ret)
 795                                 goto err_put;
 796                 }
 797         }
 798
 799         if (device->node_type == RDMA_NODE_RNIC && device->get_protocol_stats) {
 800                 ret = sysfs_create_group(&class_dev->kobj, &iw_stats_group);
 801                 if (ret)
 802                         goto err_put;
 803         }
 804
 805         return 0;
 806
 807 err_put:
 808         {
 809                 struct kobject *p, *t;
 810                 struct ib_port *port;
 811
 812                 list_for_each_entry_safe(p, t, &device->port_list, entry) {
 813                         list_del(&p->entry);
 814                         port = container_of(p, struct ib_port, kobj);
 815                         sysfs_remove_group(p, &pma_group);
 816                         sysfs_remove_group(p, &port->pkey_group);
 817                         sysfs_remove_group(p, &port->gid_group);
 818                         kobject_put(p);
 819                 }
 820         }
 821
 822         kobject_put(&class_dev->kobj);
 823
 824 err_unregister:
 825         device_unregister(class_dev);
 826
 827 err:
 828         return ret;
 829 }
 830
 831 void ib_device_unregister_sysfs(struct ib_device *device)
 832 {
 833         struct kobject *p, *t;
 834         struct ib_port *port;
 835
 836         /* Hold kobject until ib_dealloc_device() */
 837         kobject_get(&device->dev.kobj);
 838
 839         list_for_each_entry_safe(p, t, &device->port_list, entry) {
 840                 list_del(&p->entry);
 841                 port = container_of(p, struct ib_port, kobj);
 842                 sysfs_remove_group(p, &pma_group);
 843                 sysfs_remove_group(p, &port->pkey_group);
 844                 sysfs_remove_group(p, &port->gid_group);
 845                 kobject_put(p);
 846         }
 847
 848         kobject_put(device->ports_parent);
 849         device_unregister(&device->dev);
 850 }
 851
 852 int ib_sysfs_setup(void)
 853 {
 854         return class_register(&ib_class);
 855 }
 856
 857 void ib_sysfs_cleanup(void)
 858 {
 859         class_unregister(&ib_class);
 860 }