drivers/infiniband/hw/qib/qib_mad.c

   1 /*
   2  * Copyright (c) 2006, 2007, 2008, 2009, 2010 QLogic Corporation.
   3  * All rights reserved.
   4  * Copyright (c) 2005, 2006 PathScale, 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 <rdma/ib_smi.h>
  36
  37 #include "qib.h"
  38 #include "qib_mad.h"
  39
  40 static int reply(struct ib_smp *smp)
  41 {
  42         /*
  43          * The verbs framework will handle the directed/LID route
  44          * packet changes.
  45          */
  46         smp->method = IB_MGMT_METHOD_GET_RESP;
  47         if (smp->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
  48                 smp->status |= IB_SMP_DIRECTION;
  49         return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
  50 }
  51
  52 static void qib_send_trap(struct qib_ibport *ibp, void *data, unsigned len)
  53 {
  54         struct ib_mad_send_buf *send_buf;
  55         struct ib_mad_agent *agent;
  56         struct ib_smp *smp;
  57         int ret;
  58         unsigned long flags;
  59         unsigned long timeout;
  60
  61         agent = ibp->send_agent;
  62         if (!agent)
  63                 return;
  64
  65         /* o14-3.2.1 */
  66         if (!(ppd_from_ibp(ibp)->lflags & QIBL_LINKACTIVE))
  67                 return;
  68
  69         /* o14-2 */
  70         if (ibp->trap_timeout && time_before(jiffies, ibp->trap_timeout))
  71                 return;
  72
  73         send_buf = ib_create_send_mad(agent, 0, 0, 0, IB_MGMT_MAD_HDR,
  74                                       IB_MGMT_MAD_DATA, GFP_ATOMIC);
  75         if (IS_ERR(send_buf))
  76                 return;
  77
  78         smp = send_buf->mad;
  79         smp->base_version = IB_MGMT_BASE_VERSION;
  80         smp->mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
  81         smp->class_version = 1;
  82         smp->method = IB_MGMT_METHOD_TRAP;
  83         ibp->tid++;
  84         smp->tid = cpu_to_be64(ibp->tid);
  85         smp->attr_id = IB_SMP_ATTR_NOTICE;
  86         /* o14-1: smp->mkey = 0; */
  87         memcpy(smp->data, data, len);
  88
  89         spin_lock_irqsave(&ibp->lock, flags);
  90         if (!ibp->sm_ah) {
  91                 if (ibp->sm_lid != be16_to_cpu(IB_LID_PERMISSIVE)) {
  92                         struct ib_ah *ah;
  93                         struct ib_ah_attr attr;
  94
  95                         memset(&attr, 0, sizeof attr);
  96                         attr.dlid = ibp->sm_lid;
  97                         attr.port_num = ppd_from_ibp(ibp)->port;
  98                         ah = ib_create_ah(ibp->qp0->ibqp.pd, &attr);
  99                         if (IS_ERR(ah))
 100                                 ret = -EINVAL;
 101                         else {
 102                                 send_buf->ah = ah;
 103                                 ibp->sm_ah = to_iah(ah);
 104                                 ret = 0;
 105                         }
 106                 } else
 107                         ret = -EINVAL;
 108         } else {
 109                 send_buf->ah = &ibp->sm_ah->ibah;
 110                 ret = 0;
 111         }
 112         spin_unlock_irqrestore(&ibp->lock, flags);
 113
 114         if (!ret)
 115                 ret = ib_post_send_mad(send_buf, NULL);
 116         if (!ret) {
 117                 /* 4.096 usec. */
 118                 timeout = (4096 * (1UL << ibp->subnet_timeout)) / 1000;
 119                 ibp->trap_timeout = jiffies + usecs_to_jiffies(timeout);
 120         } else {
 121                 ib_free_send_mad(send_buf);
 122                 ibp->trap_timeout = 0;
 123         }
 124 }
 125
 126 /*
 127  * Send a bad [PQ]_Key trap (ch. 14.3.8).
 128  */
 129 void qib_bad_pqkey(struct qib_ibport *ibp, __be16 trap_num, u32 key, u32 sl,
 130                    u32 qp1, u32 qp2, __be16 lid1, __be16 lid2)
 131 {
 132         struct ib_mad_notice_attr data;
 133
 134         if (trap_num == IB_NOTICE_TRAP_BAD_PKEY)
 135                 ibp->pkey_violations++;
 136         else
 137                 ibp->qkey_violations++;
 138         ibp->n_pkt_drops++;
 139
 140         /* Send violation trap */
 141         data.generic_type = IB_NOTICE_TYPE_SECURITY;
 142         data.prod_type_msb = 0;
 143         data.prod_type_lsb = IB_NOTICE_PROD_CA;
 144         data.trap_num = trap_num;
 145         data.issuer_lid = cpu_to_be16(ppd_from_ibp(ibp)->lid);
 146         data.toggle_count = 0;
 147         memset(&data.details, 0, sizeof data.details);
 148         data.details.ntc_257_258.lid1 = lid1;
 149         data.details.ntc_257_258.lid2 = lid2;
 150         data.details.ntc_257_258.key = cpu_to_be32(key);
 151         data.details.ntc_257_258.sl_qp1 = cpu_to_be32((sl << 28) | qp1);
 152         data.details.ntc_257_258.qp2 = cpu_to_be32(qp2);
 153
 154         qib_send_trap(ibp, &data, sizeof data);
 155 }
 156
 157 /*
 158  * Send a bad M_Key trap (ch. 14.3.9).
 159  */
 160 static void qib_bad_mkey(struct qib_ibport *ibp, struct ib_smp *smp)
 161 {
 162         struct ib_mad_notice_attr data;
 163
 164         /* Send violation trap */
 165         data.generic_type = IB_NOTICE_TYPE_SECURITY;
 166         data.prod_type_msb = 0;
 167         data.prod_type_lsb = IB_NOTICE_PROD_CA;
 168         data.trap_num = IB_NOTICE_TRAP_BAD_MKEY;
 169         data.issuer_lid = cpu_to_be16(ppd_from_ibp(ibp)->lid);
 170         data.toggle_count = 0;
 171         memset(&data.details, 0, sizeof data.details);
 172         data.details.ntc_256.lid = data.issuer_lid;
 173         data.details.ntc_256.method = smp->method;
 174         data.details.ntc_256.attr_id = smp->attr_id;
 175         data.details.ntc_256.attr_mod = smp->attr_mod;
 176         data.details.ntc_256.mkey = smp->mkey;
 177         if (smp->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
 178                 u8 hop_cnt;
 179
 180                 data.details.ntc_256.dr_slid = smp->dr_slid;
 181                 data.details.ntc_256.dr_trunc_hop = IB_NOTICE_TRAP_DR_NOTICE;
 182                 hop_cnt = smp->hop_cnt;
 183                 if (hop_cnt > ARRAY_SIZE(data.details.ntc_256.dr_rtn_path)) {
 184                         data.details.ntc_256.dr_trunc_hop |=
 185                                 IB_NOTICE_TRAP_DR_TRUNC;
 186                         hop_cnt = ARRAY_SIZE(data.details.ntc_256.dr_rtn_path);
 187                 }
 188                 data.details.ntc_256.dr_trunc_hop |= hop_cnt;
 189                 memcpy(data.details.ntc_256.dr_rtn_path, smp->return_path,
 190                        hop_cnt);
 191         }
 192
 193         qib_send_trap(ibp, &data, sizeof data);
 194 }
 195
 196 /*
 197  * Send a Port Capability Mask Changed trap (ch. 14.3.11).
 198  */
 199 void qib_cap_mask_chg(struct qib_ibport *ibp)
 200 {
 201         struct ib_mad_notice_attr data;
 202
 203         data.generic_type = IB_NOTICE_TYPE_INFO;
 204         data.prod_type_msb = 0;
 205         data.prod_type_lsb = IB_NOTICE_PROD_CA;
 206         data.trap_num = IB_NOTICE_TRAP_CAP_MASK_CHG;
 207         data.issuer_lid = cpu_to_be16(ppd_from_ibp(ibp)->lid);
 208         data.toggle_count = 0;
 209         memset(&data.details, 0, sizeof data.details);
 210         data.details.ntc_144.lid = data.issuer_lid;
 211         data.details.ntc_144.new_cap_mask = cpu_to_be32(ibp->port_cap_flags);
 212
 213         qib_send_trap(ibp, &data, sizeof data);
 214 }
 215
 216 /*
 217  * Send a System Image GUID Changed trap (ch. 14.3.12).
 218  */
 219 void qib_sys_guid_chg(struct qib_ibport *ibp)
 220 {
 221         struct ib_mad_notice_attr data;
 222
 223         data.generic_type = IB_NOTICE_TYPE_INFO;
 224         data.prod_type_msb = 0;
 225         data.prod_type_lsb = IB_NOTICE_PROD_CA;
 226         data.trap_num = IB_NOTICE_TRAP_SYS_GUID_CHG;
 227         data.issuer_lid = cpu_to_be16(ppd_from_ibp(ibp)->lid);
 228         data.toggle_count = 0;
 229         memset(&data.details, 0, sizeof data.details);
 230         data.details.ntc_145.lid = data.issuer_lid;
 231         data.details.ntc_145.new_sys_guid = ib_qib_sys_image_guid;
 232
 233         qib_send_trap(ibp, &data, sizeof data);
 234 }
 235
 236 /*
 237  * Send a Node Description Changed trap (ch. 14.3.13).
 238  */
 239 void qib_node_desc_chg(struct qib_ibport *ibp)
 240 {
 241         struct ib_mad_notice_attr data;
 242
 243         data.generic_type = IB_NOTICE_TYPE_INFO;
 244         data.prod_type_msb = 0;
 245         data.prod_type_lsb = IB_NOTICE_PROD_CA;
 246         data.trap_num = IB_NOTICE_TRAP_CAP_MASK_CHG;
 247         data.issuer_lid = cpu_to_be16(ppd_from_ibp(ibp)->lid);
 248         data.toggle_count = 0;
 249         memset(&data.details, 0, sizeof data.details);
 250         data.details.ntc_144.lid = data.issuer_lid;
 251         data.details.ntc_144.local_changes = 1;
 252         data.details.ntc_144.change_flags = IB_NOTICE_TRAP_NODE_DESC_CHG;
 253
 254         qib_send_trap(ibp, &data, sizeof data);
 255 }
 256
 257 static int subn_get_nodedescription(struct ib_smp *smp,
 258                                     struct ib_device *ibdev)
 259 {
 260         if (smp->attr_mod)
 261                 smp->status |= IB_SMP_INVALID_FIELD;
 262
 263         memcpy(smp->data, ibdev->node_desc, sizeof(smp->data));
 264
 265         return reply(smp);
 266 }
 267
 268 static int subn_get_nodeinfo(struct ib_smp *smp, struct ib_device *ibdev,
 269                              u8 port)
 270 {
 271         struct ib_node_info *nip = (struct ib_node_info *)&smp->data;
 272         struct qib_devdata *dd = dd_from_ibdev(ibdev);
 273         u32 vendor, majrev, minrev;
 274         unsigned pidx = port - 1; /* IB number port from 1, hdw from 0 */
 275
 276         /* GUID 0 is illegal */
 277         if (smp->attr_mod || pidx >= dd->num_pports ||
 278             dd->pport[pidx].guid == 0)
 279                 smp->status |= IB_SMP_INVALID_FIELD;
 280         else
 281                 nip->port_guid = dd->pport[pidx].guid;
 282
 283         nip->base_version = 1;
 284         nip->class_version = 1;
 285         nip->node_type = 1;     /* channel adapter */
 286         nip->num_ports = ibdev->phys_port_cnt;
 287         /* This is already in network order */
 288         nip->sys_guid = ib_qib_sys_image_guid;
 289         nip->node_guid = dd->pport->guid; /* Use first-port GUID as node */
 290         nip->partition_cap = cpu_to_be16(qib_get_npkeys(dd));
 291         nip->device_id = cpu_to_be16(dd->deviceid);
 292         majrev = dd->majrev;
 293         minrev = dd->minrev;
 294         nip->revision = cpu_to_be32((majrev << 16) | minrev);
 295         nip->local_port_num = port;
 296         vendor = dd->vendorid;
 297         nip->vendor_id[0] = QIB_SRC_OUI_1;
 298         nip->vendor_id[1] = QIB_SRC_OUI_2;
 299         nip->vendor_id[2] = QIB_SRC_OUI_3;
 300
 301         return reply(smp);
 302 }
 303
 304 static int subn_get_guidinfo(struct ib_smp *smp, struct ib_device *ibdev,
 305                              u8 port)
 306 {
 307         struct qib_devdata *dd = dd_from_ibdev(ibdev);
 308         u32 startgx = 8 * be32_to_cpu(smp->attr_mod);
 309         __be64 *p = (__be64 *) smp->data;
 310         unsigned pidx = port - 1; /* IB number port from 1, hdw from 0 */
 311
 312         /* 32 blocks of 8 64-bit GUIDs per block */
 313
 314         memset(smp->data, 0, sizeof(smp->data));
 315
 316         if (startgx == 0 && pidx < dd->num_pports) {
 317                 struct qib_pportdata *ppd = dd->pport + pidx;
 318                 struct qib_ibport *ibp = &ppd->ibport_data;
 319                 __be64 g = ppd->guid;
 320                 unsigned i;
 321
 322                 /* GUID 0 is illegal */
 323                 if (g == 0)
 324                         smp->status |= IB_SMP_INVALID_FIELD;
 325                 else {
 326                         /* The first is a copy of the read-only HW GUID. */
 327                         p[0] = g;
 328                         for (i = 1; i < QIB_GUIDS_PER_PORT; i++)
 329                                 p[i] = ibp->guids[i - 1];
 330                 }
 331         } else
 332                 smp->status |= IB_SMP_INVALID_FIELD;
 333
 334         return reply(smp);
 335 }
 336
 337 static void set_link_width_enabled(struct qib_pportdata *ppd, u32 w)
 338 {
 339         (void) ppd->dd->f_set_ib_cfg(ppd, QIB_IB_CFG_LWID_ENB, w);
 340 }
 341
 342 static void set_link_speed_enabled(struct qib_pportdata *ppd, u32 s)
 343 {
 344         (void) ppd->dd->f_set_ib_cfg(ppd, QIB_IB_CFG_SPD_ENB, s);
 345 }
 346
 347 static int get_overrunthreshold(struct qib_pportdata *ppd)
 348 {
 349         return ppd->dd->f_get_ib_cfg(ppd, QIB_IB_CFG_OVERRUN_THRESH);
 350 }
 351
 352 /**
 353  * set_overrunthreshold - set the overrun threshold
 354  * @ppd: the physical port data
 355  * @n: the new threshold
 356  *
 357  * Note that this will only take effect when the link state changes.
 358  */
 359 static int set_overrunthreshold(struct qib_pportdata *ppd, unsigned n)
 360 {
 361         (void) ppd->dd->f_set_ib_cfg(ppd, QIB_IB_CFG_OVERRUN_THRESH,
 362                                          (u32)n);
 363         return 0;
 364 }
 365
 366 static int get_phyerrthreshold(struct qib_pportdata *ppd)
 367 {
 368         return ppd->dd->f_get_ib_cfg(ppd, QIB_IB_CFG_PHYERR_THRESH);
 369 }
 370
 371 /**
 372  * set_phyerrthreshold - set the physical error threshold
 373  * @ppd: the physical port data
 374  * @n: the new threshold
 375  *
 376  * Note that this will only take effect when the link state changes.
 377  */
 378 static int set_phyerrthreshold(struct qib_pportdata *ppd, unsigned n)
 379 {
 380         (void) ppd->dd->f_set_ib_cfg(ppd, QIB_IB_CFG_PHYERR_THRESH,
 381                                          (u32)n);
 382         return 0;
 383 }
 384
 385 /**
 386  * get_linkdowndefaultstate - get the default linkdown state
 387  * @ppd: the physical port data
 388  *
 389  * Returns zero if the default is POLL, 1 if the default is SLEEP.
 390  */
 391 static int get_linkdowndefaultstate(struct qib_pportdata *ppd)
 392 {
 393         return ppd->dd->f_get_ib_cfg(ppd, QIB_IB_CFG_LINKDEFAULT) ==
 394                 IB_LINKINITCMD_SLEEP;
 395 }
 396
 397 static int check_mkey(struct qib_ibport *ibp, struct ib_smp *smp, int mad_flags)
 398 {
 399         int ret = 0;
 400
 401         /* Is the mkey in the process of expiring? */
 402         if (ibp->mkey_lease_timeout &&
 403             time_after_eq(jiffies, ibp->mkey_lease_timeout)) {
 404                 /* Clear timeout and mkey protection field. */
 405                 ibp->mkey_lease_timeout = 0;
 406                 ibp->mkeyprot = 0;
 407         }
 408
 409         /* M_Key checking depends on Portinfo:M_Key_protect_bits */
 410         if ((mad_flags & IB_MAD_IGNORE_MKEY) == 0 && ibp->mkey != 0 &&
 411             ibp->mkey != smp->mkey &&
 412             (smp->method == IB_MGMT_METHOD_SET ||
 413              smp->method == IB_MGMT_METHOD_TRAP_REPRESS ||
 414              (smp->method == IB_MGMT_METHOD_GET && ibp->mkeyprot >= 2))) {
 415                 if (ibp->mkey_violations != 0xFFFF)
 416                         ++ibp->mkey_violations;
 417                 if (!ibp->mkey_lease_timeout && ibp->mkey_lease_period)
 418                         ibp->mkey_lease_timeout = jiffies +
 419                                 ibp->mkey_lease_period * HZ;
 420                 /* Generate a trap notice. */
 421                 qib_bad_mkey(ibp, smp);
 422                 ret = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
 423         } else if (ibp->mkey_lease_timeout)
 424                 ibp->mkey_lease_timeout = 0;
 425
 426         return ret;
 427 }
 428
 429 static int subn_get_portinfo(struct ib_smp *smp, struct ib_device *ibdev,
 430                              u8 port)
 431 {
 432         struct qib_devdata *dd;
 433         struct qib_pportdata *ppd;
 434         struct qib_ibport *ibp;
 435         struct ib_port_info *pip = (struct ib_port_info *)smp->data;
 436         u16 lid;
 437         u8 mtu;
 438         int ret;
 439         u32 state;
 440         u32 port_num = be32_to_cpu(smp->attr_mod);
 441
 442         if (port_num == 0)
 443                 port_num = port;
 444         else {
 445                 if (port_num > ibdev->phys_port_cnt) {
 446                         smp->status |= IB_SMP_INVALID_FIELD;
 447                         ret = reply(smp);
 448                         goto bail;
 449                 }
 450                 if (port_num != port) {
 451                         ibp = to_iport(ibdev, port_num);
 452                         ret = check_mkey(ibp, smp, 0);
 453                         if (ret)
 454                                 goto bail;
 455                 }
 456         }
 457
 458         dd = dd_from_ibdev(ibdev);
 459         /* IB numbers ports from 1, hdw from 0 */
 460         ppd = dd->pport + (port_num - 1);
 461         ibp = &ppd->ibport_data;
 462
 463         /* Clear all fields.  Only set the non-zero fields. */
 464         memset(smp->data, 0, sizeof(smp->data));
 465
 466         /* Only return the mkey if the protection field allows it. */
 467         if (smp->method == IB_MGMT_METHOD_SET || ibp->mkey == smp->mkey ||
 468             ibp->mkeyprot == 0)
 469                 pip->mkey = ibp->mkey;
 470         pip->gid_prefix = ibp->gid_prefix;
 471         lid = ppd->lid;
 472         pip->lid = lid ? cpu_to_be16(lid) : IB_LID_PERMISSIVE;
 473         pip->sm_lid = cpu_to_be16(ibp->sm_lid);
 474         pip->cap_mask = cpu_to_be32(ibp->port_cap_flags);
 475         /* pip->diag_code; */
 476         pip->mkey_lease_period = cpu_to_be16(ibp->mkey_lease_period);
 477         pip->local_port_num = port;
 478         pip->link_width_enabled = ppd->link_width_enabled;
 479         pip->link_width_supported = ppd->link_width_supported;
 480         pip->link_width_active = ppd->link_width_active;
 481         state = dd->f_iblink_state(ppd->lastibcstat);
 482         pip->linkspeed_portstate = ppd->link_speed_supported << 4 | state;
 483
 484         pip->portphysstate_linkdown =
 485                 (dd->f_ibphys_portstate(ppd->lastibcstat) << 4) |
 486                 (get_linkdowndefaultstate(ppd) ? 1 : 2);
 487         pip->mkeyprot_resv_lmc = (ibp->mkeyprot << 6) | ppd->lmc;
 488         pip->linkspeedactive_enabled = (ppd->link_speed_active << 4) |
 489                 ppd->link_speed_enabled;
 490         switch (ppd->ibmtu) {
 491         default: /* something is wrong; fall through */
 492         case 4096:
 493                 mtu = IB_MTU_4096;
 494                 break;
 495         case 2048:
 496                 mtu = IB_MTU_2048;
 497                 break;
 498         case 1024:
 499                 mtu = IB_MTU_1024;
 500                 break;
 501         case 512:
 502                 mtu = IB_MTU_512;
 503                 break;
 504         case 256:
 505                 mtu = IB_MTU_256;
 506                 break;
 507         }
 508         pip->neighbormtu_mastersmsl = (mtu << 4) | ibp->sm_sl;
 509         pip->vlcap_inittype = ppd->vls_supported << 4;  /* InitType = 0 */
 510         pip->vl_high_limit = ibp->vl_high_limit;
 511         pip->vl_arb_high_cap =
 512                 dd->f_get_ib_cfg(ppd, QIB_IB_CFG_VL_HIGH_CAP);
 513         pip->vl_arb_low_cap =
 514                 dd->f_get_ib_cfg(ppd, QIB_IB_CFG_VL_LOW_CAP);
 515         /* InitTypeReply = 0 */
 516         pip->inittypereply_mtucap = qib_ibmtu ? qib_ibmtu : IB_MTU_4096;
 517         /* HCAs ignore VLStallCount and HOQLife */
 518         /* pip->vlstallcnt_hoqlife; */
 519         pip->operationalvl_pei_peo_fpi_fpo =
 520                 dd->f_get_ib_cfg(ppd, QIB_IB_CFG_OP_VLS) << 4;
 521         pip->mkey_violations = cpu_to_be16(ibp->mkey_violations);
 522         /* P_KeyViolations are counted by hardware. */
 523         pip->pkey_violations = cpu_to_be16(ibp->pkey_violations);
 524         pip->qkey_violations = cpu_to_be16(ibp->qkey_violations);
 525         /* Only the hardware GUID is supported for now */
 526         pip->guid_cap = QIB_GUIDS_PER_PORT;
 527         pip->clientrereg_resv_subnetto = ibp->subnet_timeout;
 528         /* 32.768 usec. response time (guessing) */
 529         pip->resv_resptimevalue = 3;
 530         pip->localphyerrors_overrunerrors =
 531                 (get_phyerrthreshold(ppd) << 4) |
 532                 get_overrunthreshold(ppd);
 533         /* pip->max_credit_hint; */
 534         if (ibp->port_cap_flags & IB_PORT_LINK_LATENCY_SUP) {
 535                 u32 v;
 536
 537                 v = dd->f_get_ib_cfg(ppd, QIB_IB_CFG_LINKLATENCY);
 538                 pip->link_roundtrip_latency[0] = v >> 16;
 539                 pip->link_roundtrip_latency[1] = v >> 8;
 540                 pip->link_roundtrip_latency[2] = v;
 541         }
 542
 543         ret = reply(smp);
 544
 545 bail:
 546         return ret;
 547 }
 548
 549 /**
 550  * get_pkeys - return the PKEY table
 551  * @dd: the qlogic_ib device
 552  * @port: the IB port number
 553  * @pkeys: the pkey table is placed here
 554  */
 555 static int get_pkeys(struct qib_devdata *dd, u8 port, u16 *pkeys)
 556 {
 557         struct qib_pportdata *ppd = dd->pport + port - 1;
 558         /*
 559          * always a kernel context, no locking needed.
 560          * If we get here with ppd setup, no need to check
 561          * that pd is valid.
 562          */
 563         struct qib_ctxtdata *rcd = dd->rcd[ppd->hw_pidx];
 564
 565         memcpy(pkeys, rcd->pkeys, sizeof(rcd->pkeys));
 566
 567         return 0;
 568 }
 569
 570 static int subn_get_pkeytable(struct ib_smp *smp, struct ib_device *ibdev,
 571                               u8 port)
 572 {
 573         u32 startpx = 32 * (be32_to_cpu(smp->attr_mod) & 0xffff);
 574         u16 *p = (u16 *) smp->data;
 575         __be16 *q = (__be16 *) smp->data;
 576
 577         /* 64 blocks of 32 16-bit P_Key entries */
 578
 579         memset(smp->data, 0, sizeof(smp->data));
 580         if (startpx == 0) {
 581                 struct qib_devdata *dd = dd_from_ibdev(ibdev);
 582                 unsigned i, n = qib_get_npkeys(dd);
 583
 584                 get_pkeys(dd, port, p);
 585
 586                 for (i = 0; i < n; i++)
 587                         q[i] = cpu_to_be16(p[i]);
 588         } else
 589                 smp->status |= IB_SMP_INVALID_FIELD;
 590
 591         return reply(smp);
 592 }
 593
 594 static int subn_set_guidinfo(struct ib_smp *smp, struct ib_device *ibdev,
 595                              u8 port)
 596 {
 597         struct qib_devdata *dd = dd_from_ibdev(ibdev);
 598         u32 startgx = 8 * be32_to_cpu(smp->attr_mod);
 599         __be64 *p = (__be64 *) smp->data;
 600         unsigned pidx = port - 1; /* IB number port from 1, hdw from 0 */
 601
 602         /* 32 blocks of 8 64-bit GUIDs per block */
 603
 604         if (startgx == 0 && pidx < dd->num_pports) {
 605                 struct qib_pportdata *ppd = dd->pport + pidx;
 606                 struct qib_ibport *ibp = &ppd->ibport_data;
 607                 unsigned i;
 608
 609                 /* The first entry is read-only. */
 610                 for (i = 1; i < QIB_GUIDS_PER_PORT; i++)
 611                         ibp->guids[i - 1] = p[i];
 612         } else
 613                 smp->status |= IB_SMP_INVALID_FIELD;
 614
 615         /* The only GUID we support is the first read-only entry. */
 616         return subn_get_guidinfo(smp, ibdev, port);
 617 }
 618
 619 /**
 620  * subn_set_portinfo - set port information
 621  * @smp: the incoming SM packet
 622  * @ibdev: the infiniband device
 623  * @port: the port on the device
 624  *
 625  * Set Portinfo (see ch. 14.2.5.6).
 626  */
 627 static int subn_set_portinfo(struct ib_smp *smp, struct ib_device *ibdev,
 628                              u8 port)
 629 {
 630         struct ib_port_info *pip = (struct ib_port_info *)smp->data;
 631         struct ib_event event;
 632         struct qib_devdata *dd;
 633         struct qib_pportdata *ppd;
 634         struct qib_ibport *ibp;
 635         char clientrereg = 0;
 636         unsigned long flags;
 637         u16 lid, smlid;
 638         u8 lwe;
 639         u8 lse;
 640         u8 state;
 641         u8 vls;
 642         u8 msl;
 643         u16 lstate;
 644         int ret, ore, mtu;
 645         u32 port_num = be32_to_cpu(smp->attr_mod);
 646
 647         if (port_num == 0)
 648                 port_num = port;
 649         else {
 650                 if (port_num > ibdev->phys_port_cnt)
 651                         goto err;
 652                 /* Port attributes can only be set on the receiving port */
 653                 if (port_num != port)
 654                         goto get_only;
 655         }
 656
 657         dd = dd_from_ibdev(ibdev);
 658         /* IB numbers ports from 1, hdw from 0 */
 659         ppd = dd->pport + (port_num - 1);
 660         ibp = &ppd->ibport_data;
 661         event.device = ibdev;
 662         event.element.port_num = port;
 663
 664         ibp->mkey = pip->mkey;
 665         ibp->gid_prefix = pip->gid_prefix;
 666         ibp->mkey_lease_period = be16_to_cpu(pip->mkey_lease_period);
 667
 668         lid = be16_to_cpu(pip->lid);
 669         /* Must be a valid unicast LID address. */
 670         if (lid == 0 || lid >= QIB_MULTICAST_LID_BASE)
 671                 smp->status |= IB_SMP_INVALID_FIELD;
 672         else if (ppd->lid != lid || ppd->lmc != (pip->mkeyprot_resv_lmc & 7)) {
 673                 if (ppd->lid != lid)
 674                         qib_set_uevent_bits(ppd, _QIB_EVENT_LID_CHANGE_BIT);
 675                 if (ppd->lmc != (pip->mkeyprot_resv_lmc & 7))
 676                         qib_set_uevent_bits(ppd, _QIB_EVENT_LMC_CHANGE_BIT);
 677                 qib_set_lid(ppd, lid, pip->mkeyprot_resv_lmc & 7);
 678                 event.event = IB_EVENT_LID_CHANGE;
 679                 ib_dispatch_event(&event);
 680         }
 681
 682         smlid = be16_to_cpu(pip->sm_lid);
 683         msl = pip->neighbormtu_mastersmsl & 0xF;
 684         /* Must be a valid unicast LID address. */
 685         if (smlid == 0 || smlid >= QIB_MULTICAST_LID_BASE)
 686                 smp->status |= IB_SMP_INVALID_FIELD;
 687         else if (smlid != ibp->sm_lid || msl != ibp->sm_sl) {
 688                 spin_lock_irqsave(&ibp->lock, flags);
 689                 if (ibp->sm_ah) {
 690                         if (smlid != ibp->sm_lid)
 691                                 ibp->sm_ah->attr.dlid = smlid;
 692                         if (msl != ibp->sm_sl)
 693                                 ibp->sm_ah->attr.sl = msl;
 694                 }
 695                 spin_unlock_irqrestore(&ibp->lock, flags);
 696                 if (smlid != ibp->sm_lid)
 697                         ibp->sm_lid = smlid;
 698                 if (msl != ibp->sm_sl)
 699                         ibp->sm_sl = msl;
 700                 event.event = IB_EVENT_SM_CHANGE;
 701                 ib_dispatch_event(&event);
 702         }
 703
 704         /* Allow 1x or 4x to be set (see 14.2.6.6). */
 705         lwe = pip->link_width_enabled;
 706         if (lwe) {
 707                 if (lwe == 0xFF)
 708                         lwe = ppd->link_width_supported;
 709                 else if (lwe >= 16 || (lwe & ~ppd->link_width_supported))
 710                         smp->status |= IB_SMP_INVALID_FIELD;
 711                 else if (lwe != ppd->link_width_enabled)
 712                         set_link_width_enabled(ppd, lwe);
 713         }
 714
 715         lse = pip->linkspeedactive_enabled & 0xF;
 716         if (lse) {
 717                 /*
 718                  * The IB 1.2 spec. only allows link speed values
 719                  * 1, 3, 5, 7, 15.  1.2.1 extended to allow specific
 720                  * speeds.
 721                  */
 722                 if (lse == 15)
 723                         lse = ppd->link_speed_supported;
 724                 else if (lse >= 8 || (lse & ~ppd->link_speed_supported))
 725                         smp->status |= IB_SMP_INVALID_FIELD;
 726                 else if (lse != ppd->link_speed_enabled)
 727                         set_link_speed_enabled(ppd, lse);
 728         }
 729
 730         /* Set link down default state. */
 731         switch (pip->portphysstate_linkdown & 0xF) {
 732         case 0: /* NOP */
 733                 break;
 734         case 1: /* SLEEP */
 735                 (void) dd->f_set_ib_cfg(ppd, QIB_IB_CFG_LINKDEFAULT,
 736                                         IB_LINKINITCMD_SLEEP);
 737                 break;
 738         case 2: /* POLL */
 739                 (void) dd->f_set_ib_cfg(ppd, QIB_IB_CFG_LINKDEFAULT,
 740                                         IB_LINKINITCMD_POLL);
 741                 break;
 742         default:
 743                 smp->status |= IB_SMP_INVALID_FIELD;
 744         }
 745
 746         ibp->mkeyprot = pip->mkeyprot_resv_lmc >> 6;
 747         ibp->vl_high_limit = pip->vl_high_limit;
 748         (void) dd->f_set_ib_cfg(ppd, QIB_IB_CFG_VL_HIGH_LIMIT,
 749                                     ibp->vl_high_limit);
 750
 751         mtu = ib_mtu_enum_to_int((pip->neighbormtu_mastersmsl >> 4) & 0xF);
 752         if (mtu == -1)
 753                 smp->status |= IB_SMP_INVALID_FIELD;
 754         else
 755                 qib_set_mtu(ppd, mtu);
 756
 757         /* Set operational VLs */
 758         vls = (pip->operationalvl_pei_peo_fpi_fpo >> 4) & 0xF;
 759         if (vls) {
 760                 if (vls > ppd->vls_supported)
 761                         smp->status |= IB_SMP_INVALID_FIELD;
 762                 else
 763                         (void) dd->f_set_ib_cfg(ppd, QIB_IB_CFG_OP_VLS, vls);
 764         }
 765
 766         if (pip->mkey_violations == 0)
 767                 ibp->mkey_violations = 0;
 768
 769         if (pip->pkey_violations == 0)
 770                 ibp->pkey_violations = 0;
 771
 772         if (pip->qkey_violations == 0)
 773                 ibp->qkey_violations = 0;
 774
 775         ore = pip->localphyerrors_overrunerrors;
 776         if (set_phyerrthreshold(ppd, (ore >> 4) & 0xF))
 777                 smp->status |= IB_SMP_INVALID_FIELD;
 778
 779         if (set_overrunthreshold(ppd, (ore & 0xF)))
 780                 smp->status |= IB_SMP_INVALID_FIELD;
 781
 782         ibp->subnet_timeout = pip->clientrereg_resv_subnetto & 0x1F;
 783
 784         if (pip->clientrereg_resv_subnetto & 0x80) {
 785                 clientrereg = 1;
 786                 event.event = IB_EVENT_CLIENT_REREGISTER;
 787                 ib_dispatch_event(&event);
 788         }
 789
 790         /*
 791          * Do the port state change now that the other link parameters
 792          * have been set.
 793          * Changing the port physical state only makes sense if the link
 794          * is down or is being set to down.
 795          */
 796         state = pip->linkspeed_portstate & 0xF;
 797         lstate = (pip->portphysstate_linkdown >> 4) & 0xF;
 798         if (lstate && !(state == IB_PORT_DOWN || state == IB_PORT_NOP))
 799                 smp->status |= IB_SMP_INVALID_FIELD;
 800
 801         /*
 802          * Only state changes of DOWN, ARM, and ACTIVE are valid
 803          * and must be in the correct state to take effect (see 7.2.6).
 804          */
 805         switch (state) {
 806         case IB_PORT_NOP:
 807                 if (lstate == 0)
 808                         break;
 809                 /* FALLTHROUGH */
 810         case IB_PORT_DOWN:
 811                 if (lstate == 0)
 812                         lstate = QIB_IB_LINKDOWN_ONLY;
 813                 else if (lstate == 1)
 814                         lstate = QIB_IB_LINKDOWN_SLEEP;
 815                 else if (lstate == 2)
 816                         lstate = QIB_IB_LINKDOWN;
 817                 else if (lstate == 3)
 818                         lstate = QIB_IB_LINKDOWN_DISABLE;
 819                 else {
 820                         smp->status |= IB_SMP_INVALID_FIELD;
 821                         break;
 822                 }
 823                 spin_lock_irqsave(&ppd->lflags_lock, flags);
 824                 ppd->lflags &= ~QIBL_LINKV;
 825                 spin_unlock_irqrestore(&ppd->lflags_lock, flags);
 826                 qib_set_linkstate(ppd, lstate);
 827                 /*
 828                  * Don't send a reply if the response would be sent
 829                  * through the disabled port.
 830                  */
 831                 if (lstate == QIB_IB_LINKDOWN_DISABLE && smp->hop_cnt) {
 832                         ret = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
 833                         goto done;
 834                 }
 835                 qib_wait_linkstate(ppd, QIBL_LINKV, 10);
 836                 break;
 837         case IB_PORT_ARMED:
 838                 qib_set_linkstate(ppd, QIB_IB_LINKARM);
 839                 break;
 840         case IB_PORT_ACTIVE:
 841                 qib_set_linkstate(ppd, QIB_IB_LINKACTIVE);
 842                 break;
 843         default:
 844                 smp->status |= IB_SMP_INVALID_FIELD;
 845         }
 846
 847         ret = subn_get_portinfo(smp, ibdev, port);
 848
 849         if (clientrereg)
 850                 pip->clientrereg_resv_subnetto |= 0x80;
 851
 852         goto done;
 853
 854 err:
 855         smp->status |= IB_SMP_INVALID_FIELD;
 856 get_only:
 857         ret = subn_get_portinfo(smp, ibdev, port);
 858 done:
 859         return ret;
 860 }
 861
 862 /**
 863  * rm_pkey - decrecment the reference count for the given PKEY
 864  * @dd: the qlogic_ib device
 865  * @key: the PKEY index
 866  *
 867  * Return true if this was the last reference and the hardware table entry
 868  * needs to be changed.
 869  */
 870 static int rm_pkey(struct qib_pportdata *ppd, u16 key)
 871 {
 872         int i;
 873         int ret;
 874
 875         for (i = 0; i < ARRAY_SIZE(ppd->pkeys); i++) {
 876                 if (ppd->pkeys[i] != key)
 877                         continue;
 878                 if (atomic_dec_and_test(&ppd->pkeyrefs[i])) {
 879                         ppd->pkeys[i] = 0;
 880                         ret = 1;
 881                         goto bail;
 882                 }
 883                 break;
 884         }
 885
 886         ret = 0;
 887
 888 bail:
 889         return ret;
 890 }
 891
 892 /**
 893  * add_pkey - add the given PKEY to the hardware table
 894  * @dd: the qlogic_ib device
 895  * @key: the PKEY
 896  *
 897  * Return an error code if unable to add the entry, zero if no change,
 898  * or 1 if the hardware PKEY register needs to be updated.
 899  */
 900 static int add_pkey(struct qib_pportdata *ppd, u16 key)
 901 {
 902         int i;
 903         u16 lkey = key & 0x7FFF;
 904         int any = 0;
 905         int ret;
 906
 907         if (lkey == 0x7FFF) {
 908                 ret = 0;
 909                 goto bail;
 910         }
 911
 912         /* Look for an empty slot or a matching PKEY. */
 913         for (i = 0; i < ARRAY_SIZE(ppd->pkeys); i++) {
 914                 if (!ppd->pkeys[i]) {
 915                         any++;
 916                         continue;
 917                 }
 918                 /* If it matches exactly, try to increment the ref count */
 919                 if (ppd->pkeys[i] == key) {
 920                         if (atomic_inc_return(&ppd->pkeyrefs[i]) > 1) {
 921                                 ret = 0;
 922                                 goto bail;
 923                         }
 924                         /* Lost the race. Look for an empty slot below. */
 925                         atomic_dec(&ppd->pkeyrefs[i]);
 926                         any++;
 927                 }
 928                 /*
 929                  * It makes no sense to have both the limited and unlimited
 930                  * PKEY set at the same time since the unlimited one will
 931                  * disable the limited one.
 932                  */
 933                 if ((ppd->pkeys[i] & 0x7FFF) == lkey) {
 934                         ret = -EEXIST;
 935                         goto bail;
 936                 }
 937         }
 938         if (!any) {
 939                 ret = -EBUSY;
 940                 goto bail;
 941         }
 942         for (i = 0; i < ARRAY_SIZE(ppd->pkeys); i++) {
 943                 if (!ppd->pkeys[i] &&
 944                     atomic_inc_return(&ppd->pkeyrefs[i]) == 1) {
 945                         /* for qibstats, etc. */
 946                         ppd->pkeys[i] = key;
 947                         ret = 1;
 948                         goto bail;
 949                 }
 950         }
 951         ret = -EBUSY;
 952
 953 bail:
 954         return ret;
 955 }
 956
 957 /**
 958  * set_pkeys - set the PKEY table for ctxt 0
 959  * @dd: the qlogic_ib device
 960  * @port: the IB port number
 961  * @pkeys: the PKEY table
 962  */
 963 static int set_pkeys(struct qib_devdata *dd, u8 port, u16 *pkeys)
 964 {
 965         struct qib_pportdata *ppd;
 966         struct qib_ctxtdata *rcd;
 967         int i;
 968         int changed = 0;
 969
 970         /*
 971          * IB port one/two always maps to context zero/one,
 972          * always a kernel context, no locking needed
 973          * If we get here with ppd setup, no need to check
 974          * that rcd is valid.
 975          */
 976         ppd = dd->pport + (port - 1);
 977         rcd = dd->rcd[ppd->hw_pidx];
 978
 979         for (i = 0; i < ARRAY_SIZE(rcd->pkeys); i++) {
 980                 u16 key = pkeys[i];
 981                 u16 okey = rcd->pkeys[i];
 982
 983                 if (key == okey)
 984                         continue;
 985                 /*
 986                  * The value of this PKEY table entry is changing.
 987                  * Remove the old entry in the hardware's array of PKEYs.
 988                  */
 989                 if (okey & 0x7FFF)
 990                         changed |= rm_pkey(ppd, okey);
 991                 if (key & 0x7FFF) {
 992                         int ret = add_pkey(ppd, key);
 993
 994                         if (ret < 0)
 995                                 key = 0;
 996                         else
 997                                 changed |= ret;
 998                 }
 999                 rcd->pkeys[i] = key;
1000         }
1001         if (changed) {
1002                 struct ib_event event;
1003
1004                 (void) dd->f_set_ib_cfg(ppd, QIB_IB_CFG_PKEYS, 0);
1005
1006                 event.event = IB_EVENT_PKEY_CHANGE;
1007                 event.device = &dd->verbs_dev.ibdev;
1008                 event.element.port_num = 1;
1009                 ib_dispatch_event(&event);
1010         }
1011         return 0;
1012 }
1013
1014 static int subn_set_pkeytable(struct ib_smp *smp, struct ib_device *ibdev,
1015                               u8 port)
1016 {
1017         u32 startpx = 32 * (be32_to_cpu(smp->attr_mod) & 0xffff);
1018         __be16 *p = (__be16 *) smp->data;
1019         u16 *q = (u16 *) smp->data;
1020         struct qib_devdata *dd = dd_from_ibdev(ibdev);
1021         unsigned i, n = qib_get_npkeys(dd);
1022
1023         for (i = 0; i < n; i++)
1024                 q[i] = be16_to_cpu(p[i]);
1025
1026         if (startpx != 0 || set_pkeys(dd, port, q) != 0)
1027                 smp->status |= IB_SMP_INVALID_FIELD;
1028
1029         return subn_get_pkeytable(smp, ibdev, port);
1030 }
1031
1032 static int subn_get_sl_to_vl(struct ib_smp *smp, struct ib_device *ibdev,
1033                              u8 port)
1034 {
1035         struct qib_ibport *ibp = to_iport(ibdev, port);
1036         u8 *p = (u8 *) smp->data;
1037         unsigned i;
1038
1039         memset(smp->data, 0, sizeof(smp->data));
1040
1041         if (!(ibp->port_cap_flags & IB_PORT_SL_MAP_SUP))
1042                 smp->status |= IB_SMP_UNSUP_METHOD;
1043         else
1044                 for (i = 0; i < ARRAY_SIZE(ibp->sl_to_vl); i += 2)
1045                         *p++ = (ibp->sl_to_vl[i] << 4) | ibp->sl_to_vl[i + 1];
1046
1047         return reply(smp);
1048 }
1049
1050 static int subn_set_sl_to_vl(struct ib_smp *smp, struct ib_device *ibdev,
1051                              u8 port)
1052 {
1053         struct qib_ibport *ibp = to_iport(ibdev, port);
1054         u8 *p = (u8 *) smp->data;
1055         unsigned i;
1056
1057         if (!(ibp->port_cap_flags & IB_PORT_SL_MAP_SUP)) {
1058                 smp->status |= IB_SMP_UNSUP_METHOD;
1059                 return reply(smp);
1060         }
1061
1062         for (i = 0; i < ARRAY_SIZE(ibp->sl_to_vl); i += 2, p++) {
1063                 ibp->sl_to_vl[i] = *p >> 4;
1064                 ibp->sl_to_vl[i + 1] = *p & 0xF;
1065         }
1066         qib_set_uevent_bits(ppd_from_ibp(to_iport(ibdev, port)),
1067                             _QIB_EVENT_SL2VL_CHANGE_BIT);
1068
1069         return subn_get_sl_to_vl(smp, ibdev, port);
1070 }
1071
1072 static int subn_get_vl_arb(struct ib_smp *smp, struct ib_device *ibdev,
1073                            u8 port)
1074 {
1075         unsigned which = be32_to_cpu(smp->attr_mod) >> 16;
1076         struct qib_pportdata *ppd = ppd_from_ibp(to_iport(ibdev, port));
1077
1078         memset(smp->data, 0, sizeof(smp->data));
1079
1080         if (ppd->vls_supported == IB_VL_VL0)
1081                 smp->status |= IB_SMP_UNSUP_METHOD;
1082         else if (which == IB_VLARB_LOWPRI_0_31)
1083                 (void) ppd->dd->f_get_ib_table(ppd, QIB_IB_TBL_VL_LOW_ARB,
1084                                                    smp->data);
1085         else if (which == IB_VLARB_HIGHPRI_0_31)
1086                 (void) ppd->dd->f_get_ib_table(ppd, QIB_IB_TBL_VL_HIGH_ARB,
1087                                                    smp->data);
1088         else
1089                 smp->status |= IB_SMP_INVALID_FIELD;
1090
1091         return reply(smp);
1092 }
1093
1094 static int subn_set_vl_arb(struct ib_smp *smp, struct ib_device *ibdev,
1095                            u8 port)
1096 {
1097         unsigned which = be32_to_cpu(smp->attr_mod) >> 16;
1098         struct qib_pportdata *ppd = ppd_from_ibp(to_iport(ibdev, port));
1099
1100         if (ppd->vls_supported == IB_VL_VL0)
1101                 smp->status |= IB_SMP_UNSUP_METHOD;
1102         else if (which == IB_VLARB_LOWPRI_0_31)
1103                 (void) ppd->dd->f_set_ib_table(ppd, QIB_IB_TBL_VL_LOW_ARB,
1104                                                    smp->data);
1105         else if (which == IB_VLARB_HIGHPRI_0_31)
1106                 (void) ppd->dd->f_set_ib_table(ppd, QIB_IB_TBL_VL_HIGH_ARB,
1107                                                    smp->data);
1108         else
1109                 smp->status |= IB_SMP_INVALID_FIELD;
1110
1111         return subn_get_vl_arb(smp, ibdev, port);
1112 }
1113
1114 static int subn_trap_repress(struct ib_smp *smp, struct ib_device *ibdev,
1115                              u8 port)
1116 {
1117         /*
1118          * For now, we only send the trap once so no need to process this.
1119          * o13-6, o13-7,
1120          * o14-3.a4 The SMA shall not send any message in response to a valid
1121          * SubnTrapRepress() message.
1122          */
1123         return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
1124 }
1125
1126 static int pma_get_classportinfo(struct ib_perf *pmp,
1127                                  struct ib_device *ibdev)
1128 {
1129         struct ib_pma_classportinfo *p =
1130                 (struct ib_pma_classportinfo *)pmp->data;
1131         struct qib_devdata *dd = dd_from_ibdev(ibdev);
1132
1133         memset(pmp->data, 0, sizeof(pmp->data));
1134
1135         if (pmp->attr_mod != 0)
1136                 pmp->status |= IB_SMP_INVALID_FIELD;
1137
1138         /* Note that AllPortSelect is not valid */
1139         p->base_version = 1;
1140         p->class_version = 1;
1141         p->cap_mask = IB_PMA_CLASS_CAP_EXT_WIDTH;
1142         /*
1143          * Set the most significant bit of CM2 to indicate support for
1144          * congestion statistics
1145          */
1146         p->reserved[0] = dd->psxmitwait_supported << 7;
1147         /*
1148          * Expected response time is 4.096 usec. * 2^18 == 1.073741824 sec.
1149          */
1150         p->resp_time_value = 18;
1151
1152         return reply((struct ib_smp *) pmp);
1153 }
1154
1155 static int pma_get_portsamplescontrol(struct ib_perf *pmp,
1156                                       struct ib_device *ibdev, u8 port)
1157 {
1158         struct ib_pma_portsamplescontrol *p =
1159                 (struct ib_pma_portsamplescontrol *)pmp->data;
1160         struct qib_ibdev *dev = to_idev(ibdev);
1161         struct qib_devdata *dd = dd_from_dev(dev);
1162         struct qib_ibport *ibp = to_iport(ibdev, port);
1163         struct qib_pportdata *ppd = ppd_from_ibp(ibp);
1164         unsigned long flags;
1165         u8 port_select = p->port_select;
1166
1167         memset(pmp->data, 0, sizeof(pmp->data));
1168
1169         p->port_select = port_select;
1170         if (pmp->attr_mod != 0 || port_select != port) {
1171                 pmp->status |= IB_SMP_INVALID_FIELD;
1172                 goto bail;
1173         }
1174         spin_lock_irqsave(&ibp->lock, flags);
1175         p->tick = dd->f_get_ib_cfg(ppd, QIB_IB_CFG_PMA_TICKS);
1176         p->sample_status = dd->f_portcntr(ppd, QIBPORTCNTR_PSSTAT);
1177         p->counter_width = 4;   /* 32 bit counters */
1178         p->counter_mask0_9 = COUNTER_MASK0_9;
1179         p->sample_start = cpu_to_be32(ibp->pma_sample_start);
1180         p->sample_interval = cpu_to_be32(ibp->pma_sample_interval);
1181         p->tag = cpu_to_be16(ibp->pma_tag);
1182         p->counter_select[0] = ibp->pma_counter_select[0];
1183         p->counter_select[1] = ibp->pma_counter_select[1];
1184         p->counter_select[2] = ibp->pma_counter_select[2];
1185         p->counter_select[3] = ibp->pma_counter_select[3];
1186         p->counter_select[4] = ibp->pma_counter_select[4];
1187         spin_unlock_irqrestore(&ibp->lock, flags);
1188
1189 bail:
1190         return reply((struct ib_smp *) pmp);
1191 }
1192
1193 static int pma_set_portsamplescontrol(struct ib_perf *pmp,
1194                                       struct ib_device *ibdev, u8 port)
1195 {
1196         struct ib_pma_portsamplescontrol *p =
1197                 (struct ib_pma_portsamplescontrol *)pmp->data;
1198         struct qib_ibdev *dev = to_idev(ibdev);
1199         struct qib_devdata *dd = dd_from_dev(dev);
1200         struct qib_ibport *ibp = to_iport(ibdev, port);
1201         struct qib_pportdata *ppd = ppd_from_ibp(ibp);
1202         unsigned long flags;
1203         u8 status, xmit_flags;
1204         int ret;
1205
1206         if (pmp->attr_mod != 0 || p->port_select != port) {
1207                 pmp->status |= IB_SMP_INVALID_FIELD;
1208                 ret = reply((struct ib_smp *) pmp);
1209                 goto bail;
1210         }
1211
1212         spin_lock_irqsave(&ibp->lock, flags);
1213
1214         /* Port Sampling code owns the PS* HW counters */
1215         xmit_flags = ppd->cong_stats.flags;
1216         ppd->cong_stats.flags = IB_PMA_CONG_HW_CONTROL_SAMPLE;
1217         status = dd->f_portcntr(ppd, QIBPORTCNTR_PSSTAT);
1218         if (status == IB_PMA_SAMPLE_STATUS_DONE ||
1219             (status == IB_PMA_SAMPLE_STATUS_RUNNING &&
1220              xmit_flags == IB_PMA_CONG_HW_CONTROL_TIMER)) {
1221                 ibp->pma_sample_start = be32_to_cpu(p->sample_start);
1222                 ibp->pma_sample_interval = be32_to_cpu(p->sample_interval);
1223                 ibp->pma_tag = be16_to_cpu(p->tag);
1224                 ibp->pma_counter_select[0] = p->counter_select[0];
1225                 ibp->pma_counter_select[1] = p->counter_select[1];
1226                 ibp->pma_counter_select[2] = p->counter_select[2];
1227                 ibp->pma_counter_select[3] = p->counter_select[3];
1228                 ibp->pma_counter_select[4] = p->counter_select[4];
1229                 dd->f_set_cntr_sample(ppd, ibp->pma_sample_interval,
1230                                       ibp->pma_sample_start);
1231         }
1232         spin_unlock_irqrestore(&ibp->lock, flags);
1233
1234         ret = pma_get_portsamplescontrol(pmp, ibdev, port);
1235
1236 bail:
1237         return ret;
1238 }
1239
1240 static u64 get_counter(struct qib_ibport *ibp, struct qib_pportdata *ppd,
1241                        __be16 sel)
1242 {
1243         u64 ret;
1244
1245         switch (sel) {
1246         case IB_PMA_PORT_XMIT_DATA:
1247                 ret = ppd->dd->f_portcntr(ppd, QIBPORTCNTR_PSXMITDATA);
1248                 break;
1249         case IB_PMA_PORT_RCV_DATA:
1250                 ret = ppd->dd->f_portcntr(ppd, QIBPORTCNTR_PSRCVDATA);
1251                 break;
1252         case IB_PMA_PORT_XMIT_PKTS:
1253                 ret = ppd->dd->f_portcntr(ppd, QIBPORTCNTR_PSXMITPKTS);
1254                 break;
1255         case IB_PMA_PORT_RCV_PKTS:
1256                 ret = ppd->dd->f_portcntr(ppd, QIBPORTCNTR_PSRCVPKTS);
1257                 break;
1258         case IB_PMA_PORT_XMIT_WAIT:
1259                 ret = ppd->dd->f_portcntr(ppd, QIBPORTCNTR_PSXMITWAIT);
1260                 break;
1261         default:
1262                 ret = 0;
1263         }
1264
1265         return ret;
1266 }
1267
1268 /* This function assumes that the xmit_wait lock is already held */
1269 static u64 xmit_wait_get_value_delta(struct qib_pportdata *ppd)
1270 {
1271         u32 delta;
1272
1273         delta = get_counter(&ppd->ibport_data, ppd,
1274                             IB_PMA_PORT_XMIT_WAIT);
1275         return ppd->cong_stats.counter + delta;
1276 }
1277
1278 static void cache_hw_sample_counters(struct qib_pportdata *ppd)
1279 {
1280         struct qib_ibport *ibp = &ppd->ibport_data;
1281
1282         ppd->cong_stats.counter_cache.psxmitdata =
1283                 get_counter(ibp, ppd, IB_PMA_PORT_XMIT_DATA);
1284         ppd->cong_stats.counter_cache.psrcvdata =
1285                 get_counter(ibp, ppd, IB_PMA_PORT_RCV_DATA);
1286         ppd->cong_stats.counter_cache.psxmitpkts =
1287                 get_counter(ibp, ppd, IB_PMA_PORT_XMIT_PKTS);
1288         ppd->cong_stats.counter_cache.psrcvpkts =
1289                 get_counter(ibp, ppd, IB_PMA_PORT_RCV_PKTS);
1290         ppd->cong_stats.counter_cache.psxmitwait =
1291                 get_counter(ibp, ppd, IB_PMA_PORT_XMIT_WAIT);
1292 }
1293
1294 static u64 get_cache_hw_sample_counters(struct qib_pportdata *ppd,
1295                                         __be16 sel)
1296 {
1297         u64 ret;
1298
1299         switch (sel) {
1300         case IB_PMA_PORT_XMIT_DATA:
1301                 ret = ppd->cong_stats.counter_cache.psxmitdata;
1302                 break;
1303         case IB_PMA_PORT_RCV_DATA:
1304                 ret = ppd->cong_stats.counter_cache.psrcvdata;
1305                 break;
1306         case IB_PMA_PORT_XMIT_PKTS:
1307                 ret = ppd->cong_stats.counter_cache.psxmitpkts;
1308                 break;
1309         case IB_PMA_PORT_RCV_PKTS:
1310                 ret = ppd->cong_stats.counter_cache.psrcvpkts;
1311                 break;
1312         case IB_PMA_PORT_XMIT_WAIT:
1313                 ret = ppd->cong_stats.counter_cache.psxmitwait;
1314                 break;
1315         default:
1316                 ret = 0;
1317         }
1318
1319         return ret;
1320 }
1321
1322 static int pma_get_portsamplesresult(struct ib_perf *pmp,
1323                                      struct ib_device *ibdev, u8 port)
1324 {
1325         struct ib_pma_portsamplesresult *p =
1326                 (struct ib_pma_portsamplesresult *)pmp->data;
1327         struct qib_ibdev *dev = to_idev(ibdev);
1328         struct qib_devdata *dd = dd_from_dev(dev);
1329         struct qib_ibport *ibp = to_iport(ibdev, port);
1330         struct qib_pportdata *ppd = ppd_from_ibp(ibp);
1331         unsigned long flags;
1332         u8 status;
1333         int i;
1334
1335         memset(pmp->data, 0, sizeof(pmp->data));
1336         spin_lock_irqsave(&ibp->lock, flags);
1337         p->tag = cpu_to_be16(ibp->pma_tag);
1338         if (ppd->cong_stats.flags == IB_PMA_CONG_HW_CONTROL_TIMER)
1339                 p->sample_status = IB_PMA_SAMPLE_STATUS_DONE;
1340         else {
1341                 status = dd->f_portcntr(ppd, QIBPORTCNTR_PSSTAT);
1342                 p->sample_status = cpu_to_be16(status);
1343                 if (status == IB_PMA_SAMPLE_STATUS_DONE) {
1344                         cache_hw_sample_counters(ppd);
1345                         ppd->cong_stats.counter =
1346                                 xmit_wait_get_value_delta(ppd);
1347                         dd->f_set_cntr_sample(ppd,
1348                                               QIB_CONG_TIMER_PSINTERVAL, 0);
1349                         ppd->cong_stats.flags = IB_PMA_CONG_HW_CONTROL_TIMER;
1350                 }
1351         }
1352         for (i = 0; i < ARRAY_SIZE(ibp->pma_counter_select); i++)
1353                 p->counter[i] = cpu_to_be32(
1354                         get_cache_hw_sample_counters(
1355                                 ppd, ibp->pma_counter_select[i]));
1356         spin_unlock_irqrestore(&ibp->lock, flags);
1357
1358         return reply((struct ib_smp *) pmp);
1359 }
1360
1361 static int pma_get_portsamplesresult_ext(struct ib_perf *pmp,
1362                                          struct ib_device *ibdev, u8 port)
1363 {
1364         struct ib_pma_portsamplesresult_ext *p =
1365                 (struct ib_pma_portsamplesresult_ext *)pmp->data;
1366         struct qib_ibdev *dev = to_idev(ibdev);
1367         struct qib_devdata *dd = dd_from_dev(dev);
1368         struct qib_ibport *ibp = to_iport(ibdev, port);
1369         struct qib_pportdata *ppd = ppd_from_ibp(ibp);
1370         unsigned long flags;
1371         u8 status;
1372         int i;
1373
1374         /* Port Sampling code owns the PS* HW counters */
1375         memset(pmp->data, 0, sizeof(pmp->data));
1376         spin_lock_irqsave(&ibp->lock, flags);
1377         p->tag = cpu_to_be16(ibp->pma_tag);
1378         if (ppd->cong_stats.flags == IB_PMA_CONG_HW_CONTROL_TIMER)
1379                 p->sample_status = IB_PMA_SAMPLE_STATUS_DONE;
1380         else {
1381                 status = dd->f_portcntr(ppd, QIBPORTCNTR_PSSTAT);
1382                 p->sample_status = cpu_to_be16(status);
1383                 /* 64 bits */
1384                 p->extended_width = cpu_to_be32(0x80000000);
1385                 if (status == IB_PMA_SAMPLE_STATUS_DONE) {
1386                         cache_hw_sample_counters(ppd);
1387                         ppd->cong_stats.counter =
1388                                 xmit_wait_get_value_delta(ppd);
1389                         dd->f_set_cntr_sample(ppd,
1390                                               QIB_CONG_TIMER_PSINTERVAL, 0);
1391                         ppd->cong_stats.flags = IB_PMA_CONG_HW_CONTROL_TIMER;
1392                 }
1393         }
1394         for (i = 0; i < ARRAY_SIZE(ibp->pma_counter_select); i++)
1395                 p->counter[i] = cpu_to_be64(
1396                         get_cache_hw_sample_counters(
1397                                 ppd, ibp->pma_counter_select[i]));
1398         spin_unlock_irqrestore(&ibp->lock, flags);
1399
1400         return reply((struct ib_smp *) pmp);
1401 }
1402
1403 static int pma_get_portcounters(struct ib_perf *pmp,
1404                                 struct ib_device *ibdev, u8 port)
1405 {
1406         struct ib_pma_portcounters *p = (struct ib_pma_portcounters *)
1407                 pmp->data;
1408         struct qib_ibport *ibp = to_iport(ibdev, port);
1409         struct qib_pportdata *ppd = ppd_from_ibp(ibp);
1410         struct qib_verbs_counters cntrs;
1411         u8 port_select = p->port_select;
1412
1413         qib_get_counters(ppd, &cntrs);
1414
1415         /* Adjust counters for any resets done. */
1416         cntrs.symbol_error_counter -= ibp->z_symbol_error_counter;
1417         cntrs.link_error_recovery_counter -=
1418                 ibp->z_link_error_recovery_counter;
1419         cntrs.link_downed_counter -= ibp->z_link_downed_counter;
1420         cntrs.port_rcv_errors -= ibp->z_port_rcv_errors;
1421         cntrs.port_rcv_remphys_errors -= ibp->z_port_rcv_remphys_errors;
1422         cntrs.port_xmit_discards -= ibp->z_port_xmit_discards;
1423         cntrs.port_xmit_data -= ibp->z_port_xmit_data;
1424         cntrs.port_rcv_data -= ibp->z_port_rcv_data;
1425         cntrs.port_xmit_packets -= ibp->z_port_xmit_packets;
1426         cntrs.port_rcv_packets -= ibp->z_port_rcv_packets;
1427         cntrs.local_link_integrity_errors -=
1428                 ibp->z_local_link_integrity_errors;
1429         cntrs.excessive_buffer_overrun_errors -=
1430                 ibp->z_excessive_buffer_overrun_errors;
1431         cntrs.vl15_dropped -= ibp->z_vl15_dropped;
1432         cntrs.vl15_dropped += ibp->n_vl15_dropped;
1433
1434         memset(pmp->data, 0, sizeof(pmp->data));
1435
1436         p->port_select = port_select;
1437         if (pmp->attr_mod != 0 || port_select != port)
1438                 pmp->status |= IB_SMP_INVALID_FIELD;
1439
1440         if (cntrs.symbol_error_counter > 0xFFFFUL)
1441                 p->symbol_error_counter = cpu_to_be16(0xFFFF);
1442         else
1443                 p->symbol_error_counter =
1444                         cpu_to_be16((u16)cntrs.symbol_error_counter);
1445         if (cntrs.link_error_recovery_counter > 0xFFUL)
1446                 p->link_error_recovery_counter = 0xFF;
1447         else
1448                 p->link_error_recovery_counter =
1449                         (u8)cntrs.link_error_recovery_counter;
1450         if (cntrs.link_downed_counter > 0xFFUL)
1451                 p->link_downed_counter = 0xFF;
1452         else
1453                 p->link_downed_counter = (u8)cntrs.link_downed_counter;
1454         if (cntrs.port_rcv_errors > 0xFFFFUL)
1455                 p->port_rcv_errors = cpu_to_be16(0xFFFF);
1456         else
1457                 p->port_rcv_errors =
1458                         cpu_to_be16((u16) cntrs.port_rcv_errors);
1459         if (cntrs.port_rcv_remphys_errors > 0xFFFFUL)
1460                 p->port_rcv_remphys_errors = cpu_to_be16(0xFFFF);
1461         else
1462                 p->port_rcv_remphys_errors =
1463                         cpu_to_be16((u16)cntrs.port_rcv_remphys_errors);
1464         if (cntrs.port_xmit_discards > 0xFFFFUL)
1465                 p->port_xmit_discards = cpu_to_be16(0xFFFF);
1466         else
1467                 p->port_xmit_discards =
1468                         cpu_to_be16((u16)cntrs.port_xmit_discards);
1469         if (cntrs.local_link_integrity_errors > 0xFUL)
1470                 cntrs.local_link_integrity_errors = 0xFUL;
1471         if (cntrs.excessive_buffer_overrun_errors > 0xFUL)
1472                 cntrs.excessive_buffer_overrun_errors = 0xFUL;
1473         p->lli_ebor_errors = (cntrs.local_link_integrity_errors << 4) |
1474                 cntrs.excessive_buffer_overrun_errors;
1475         if (cntrs.vl15_dropped > 0xFFFFUL)
1476                 p->vl15_dropped = cpu_to_be16(0xFFFF);
1477         else
1478                 p->vl15_dropped = cpu_to_be16((u16)cntrs.vl15_dropped);
1479         if (cntrs.port_xmit_data > 0xFFFFFFFFUL)
1480                 p->port_xmit_data = cpu_to_be32(0xFFFFFFFF);
1481         else
1482                 p->port_xmit_data = cpu_to_be32((u32)cntrs.port_xmit_data);
1483         if (cntrs.port_rcv_data > 0xFFFFFFFFUL)
1484                 p->port_rcv_data = cpu_to_be32(0xFFFFFFFF);
1485         else
1486                 p->port_rcv_data = cpu_to_be32((u32)cntrs.port_rcv_data);
1487         if (cntrs.port_xmit_packets > 0xFFFFFFFFUL)
1488                 p->port_xmit_packets = cpu_to_be32(0xFFFFFFFF);
1489         else
1490                 p->port_xmit_packets =
1491                         cpu_to_be32((u32)cntrs.port_xmit_packets);
1492         if (cntrs.port_rcv_packets > 0xFFFFFFFFUL)
1493                 p->port_rcv_packets = cpu_to_be32(0xFFFFFFFF);
1494         else
1495                 p->port_rcv_packets =
1496                         cpu_to_be32((u32) cntrs.port_rcv_packets);
1497
1498         return reply((struct ib_smp *) pmp);
1499 }
1500
1501 static int pma_get_portcounters_cong(struct ib_perf *pmp,
1502                                      struct ib_device *ibdev, u8 port)
1503 {
1504         /* Congestion PMA packets start at offset 24 not 64 */
1505         struct ib_pma_portcounters_cong *p =
1506                 (struct ib_pma_portcounters_cong *)pmp->reserved;
1507         struct qib_verbs_counters cntrs;
1508         struct qib_ibport *ibp = to_iport(ibdev, port);
1509         struct qib_pportdata *ppd = ppd_from_ibp(ibp);
1510         struct qib_devdata *dd = dd_from_ppd(ppd);
1511         u32 port_select = be32_to_cpu(pmp->attr_mod) & 0xFF;
1512         u64 xmit_wait_counter;
1513         unsigned long flags;
1514
1515         /*
1516          * This check is performed only in the GET method because the
1517          * SET method ends up calling this anyway.
1518          */
1519         if (!dd->psxmitwait_supported)
1520                 pmp->status |= IB_SMP_UNSUP_METH_ATTR;
1521         if (port_select != port)
1522                 pmp->status |= IB_SMP_INVALID_FIELD;
1523
1524         qib_get_counters(ppd, &cntrs);
1525         spin_lock_irqsave(&ppd->ibport_data.lock, flags);
1526         xmit_wait_counter = xmit_wait_get_value_delta(ppd);
1527         spin_unlock_irqrestore(&ppd->ibport_data.lock, flags);
1528
1529         /* Adjust counters for any resets done. */
1530         cntrs.symbol_error_counter -= ibp->z_symbol_error_counter;
1531         cntrs.link_error_recovery_counter -=
1532                 ibp->z_link_error_recovery_counter;
1533         cntrs.link_downed_counter -= ibp->z_link_downed_counter;
1534         cntrs.port_rcv_errors -= ibp->z_port_rcv_errors;
1535         cntrs.port_rcv_remphys_errors -=
1536                 ibp->z_port_rcv_remphys_errors;
1537         cntrs.port_xmit_discards -= ibp->z_port_xmit_discards;
1538         cntrs.local_link_integrity_errors -=
1539                 ibp->z_local_link_integrity_errors;
1540         cntrs.excessive_buffer_overrun_errors -=
1541                 ibp->z_excessive_buffer_overrun_errors;
1542         cntrs.vl15_dropped -= ibp->z_vl15_dropped;
1543         cntrs.vl15_dropped += ibp->n_vl15_dropped;
1544         cntrs.port_xmit_data -= ibp->z_port_xmit_data;
1545         cntrs.port_rcv_data -= ibp->z_port_rcv_data;
1546         cntrs.port_xmit_packets -= ibp->z_port_xmit_packets;
1547         cntrs.port_rcv_packets -= ibp->z_port_rcv_packets;
1548
1549         memset(pmp->reserved, 0, sizeof(pmp->reserved) +
1550                sizeof(pmp->data));
1551
1552         /*
1553          * Set top 3 bits to indicate interval in picoseconds in
1554          * remaining bits.
1555          */
1556         p->port_check_rate =
1557                 cpu_to_be16((QIB_XMIT_RATE_PICO << 13) |
1558                             (dd->psxmitwait_check_rate &
1559                              ~(QIB_XMIT_RATE_PICO << 13)));
1560         p->port_adr_events = cpu_to_be64(0);
1561         p->port_xmit_wait = cpu_to_be64(xmit_wait_counter);
1562         p->port_xmit_data = cpu_to_be64(cntrs.port_xmit_data);
1563         p->port_rcv_data = cpu_to_be64(cntrs.port_rcv_data);
1564         p->port_xmit_packets =
1565                 cpu_to_be64(cntrs.port_xmit_packets);
1566         p->port_rcv_packets =
1567                 cpu_to_be64(cntrs.port_rcv_packets);
1568         if (cntrs.symbol_error_counter > 0xFFFFUL)
1569                 p->symbol_error_counter = cpu_to_be16(0xFFFF);
1570         else
1571                 p->symbol_error_counter =
1572                         cpu_to_be16(
1573                                 (u16)cntrs.symbol_error_counter);
1574         if (cntrs.link_error_recovery_counter > 0xFFUL)
1575                 p->link_error_recovery_counter = 0xFF;
1576         else
1577                 p->link_error_recovery_counter =
1578                         (u8)cntrs.link_error_recovery_counter;
1579         if (cntrs.link_downed_counter > 0xFFUL)
1580                 p->link_downed_counter = 0xFF;
1581         else
1582                 p->link_downed_counter =
1583                         (u8)cntrs.link_downed_counter;
1584         if (cntrs.port_rcv_errors > 0xFFFFUL)
1585                 p->port_rcv_errors = cpu_to_be16(0xFFFF);
1586         else
1587                 p->port_rcv_errors =
1588                         cpu_to_be16((u16) cntrs.port_rcv_errors);
1589         if (cntrs.port_rcv_remphys_errors > 0xFFFFUL)
1590                 p->port_rcv_remphys_errors = cpu_to_be16(0xFFFF);
1591         else
1592                 p->port_rcv_remphys_errors =
1593                         cpu_to_be16(
1594                                 (u16)cntrs.port_rcv_remphys_errors);
1595         if (cntrs.port_xmit_discards > 0xFFFFUL)
1596                 p->port_xmit_discards = cpu_to_be16(0xFFFF);
1597         else
1598                 p->port_xmit_discards =
1599                         cpu_to_be16((u16)cntrs.port_xmit_discards);
1600         if (cntrs.local_link_integrity_errors > 0xFUL)
1601                 cntrs.local_link_integrity_errors = 0xFUL;
1602         if (cntrs.excessive_buffer_overrun_errors > 0xFUL)
1603                 cntrs.excessive_buffer_overrun_errors = 0xFUL;
1604         p->lli_ebor_errors = (cntrs.local_link_integrity_errors << 4) |
1605                 cntrs.excessive_buffer_overrun_errors;
1606         if (cntrs.vl15_dropped > 0xFFFFUL)
1607                 p->vl15_dropped = cpu_to_be16(0xFFFF);
1608         else
1609                 p->vl15_dropped = cpu_to_be16((u16)cntrs.vl15_dropped);
1610
1611         return reply((struct ib_smp *)pmp);
1612 }
1613
1614 static int pma_get_portcounters_ext(struct ib_perf *pmp,
1615                                     struct ib_device *ibdev, u8 port)
1616 {
1617         struct ib_pma_portcounters_ext *p =
1618                 (struct ib_pma_portcounters_ext *)pmp->data;
1619         struct qib_ibport *ibp = to_iport(ibdev, port);
1620         struct qib_pportdata *ppd = ppd_from_ibp(ibp);
1621         u64 swords, rwords, spkts, rpkts, xwait;
1622         u8 port_select = p->port_select;
1623
1624         memset(pmp->data, 0, sizeof(pmp->data));
1625
1626         p->port_select = port_select;
1627         if (pmp->attr_mod != 0 || port_select != port) {
1628                 pmp->status |= IB_SMP_INVALID_FIELD;
1629                 goto bail;
1630         }
1631
1632         qib_snapshot_counters(ppd, &swords, &rwords, &spkts, &rpkts, &xwait);
1633
1634         /* Adjust counters for any resets done. */
1635         swords -= ibp->z_port_xmit_data;
1636         rwords -= ibp->z_port_rcv_data;
1637         spkts -= ibp->z_port_xmit_packets;
1638         rpkts -= ibp->z_port_rcv_packets;
1639
1640         p->port_xmit_data = cpu_to_be64(swords);
1641         p->port_rcv_data = cpu_to_be64(rwords);
1642         p->port_xmit_packets = cpu_to_be64(spkts);
1643         p->port_rcv_packets = cpu_to_be64(rpkts);
1644         p->port_unicast_xmit_packets = cpu_to_be64(ibp->n_unicast_xmit);
1645         p->port_unicast_rcv_packets = cpu_to_be64(ibp->n_unicast_rcv);
1646         p->port_multicast_xmit_packets = cpu_to_be64(ibp->n_multicast_xmit);
1647         p->port_multicast_rcv_packets = cpu_to_be64(ibp->n_multicast_rcv);
1648
1649 bail:
1650         return reply((struct ib_smp *) pmp);
1651 }
1652
1653 static int pma_set_portcounters(struct ib_perf *pmp,
1654                                 struct ib_device *ibdev, u8 port)
1655 {
1656         struct ib_pma_portcounters *p = (struct ib_pma_portcounters *)
1657                 pmp->data;
1658         struct qib_ibport *ibp = to_iport(ibdev, port);
1659         struct qib_pportdata *ppd = ppd_from_ibp(ibp);
1660         struct qib_verbs_counters cntrs;
1661
1662         /*
1663          * Since the HW doesn't support clearing counters, we save the
1664          * current count and subtract it from future responses.
1665          */
1666         qib_get_counters(ppd, &cntrs);
1667
1668         if (p->counter_select & IB_PMA_SEL_SYMBOL_ERROR)
1669                 ibp->z_symbol_error_counter = cntrs.symbol_error_counter;
1670
1671         if (p->counter_select & IB_PMA_SEL_LINK_ERROR_RECOVERY)
1672                 ibp->z_link_error_recovery_counter =
1673                         cntrs.link_error_recovery_counter;
1674
1675         if (p->counter_select & IB_PMA_SEL_LINK_DOWNED)
1676                 ibp->z_link_downed_counter = cntrs.link_downed_counter;
1677
1678         if (p->counter_select & IB_PMA_SEL_PORT_RCV_ERRORS)
1679                 ibp->z_port_rcv_errors = cntrs.port_rcv_errors;
1680
1681         if (p->counter_select & IB_PMA_SEL_PORT_RCV_REMPHYS_ERRORS)
1682                 ibp->z_port_rcv_remphys_errors =
1683                         cntrs.port_rcv_remphys_errors;
1684
1685         if (p->counter_select & IB_PMA_SEL_PORT_XMIT_DISCARDS)
1686                 ibp->z_port_xmit_discards = cntrs.port_xmit_discards;
1687
1688         if (p->counter_select & IB_PMA_SEL_LOCAL_LINK_INTEGRITY_ERRORS)
1689                 ibp->z_local_link_integrity_errors =
1690                         cntrs.local_link_integrity_errors;
1691
1692         if (p->counter_select & IB_PMA_SEL_EXCESSIVE_BUFFER_OVERRUNS)
1693                 ibp->z_excessive_buffer_overrun_errors =
1694                         cntrs.excessive_buffer_overrun_errors;
1695
1696         if (p->counter_select & IB_PMA_SEL_PORT_VL15_DROPPED) {
1697                 ibp->n_vl15_dropped = 0;
1698                 ibp->z_vl15_dropped = cntrs.vl15_dropped;
1699         }
1700
1701         if (p->counter_select & IB_PMA_SEL_PORT_XMIT_DATA)
1702                 ibp->z_port_xmit_data = cntrs.port_xmit_data;
1703
1704         if (p->counter_select & IB_PMA_SEL_PORT_RCV_DATA)
1705                 ibp->z_port_rcv_data = cntrs.port_rcv_data;
1706
1707         if (p->counter_select & IB_PMA_SEL_PORT_XMIT_PACKETS)
1708                 ibp->z_port_xmit_packets = cntrs.port_xmit_packets;
1709
1710         if (p->counter_select & IB_PMA_SEL_PORT_RCV_PACKETS)
1711                 ibp->z_port_rcv_packets = cntrs.port_rcv_packets;
1712
1713         return pma_get_portcounters(pmp, ibdev, port);
1714 }
1715
1716 static int pma_set_portcounters_cong(struct ib_perf *pmp,
1717                                      struct ib_device *ibdev, u8 port)
1718 {
1719         struct qib_ibport *ibp = to_iport(ibdev, port);
1720         struct qib_pportdata *ppd = ppd_from_ibp(ibp);
1721         struct qib_devdata *dd = dd_from_ppd(ppd);
1722         struct qib_verbs_counters cntrs;
1723         u32 counter_select = (be32_to_cpu(pmp->attr_mod) >> 24) & 0xFF;
1724         int ret = 0;
1725         unsigned long flags;
1726
1727         qib_get_counters(ppd, &cntrs);
1728         /* Get counter values before we save them */
1729         ret = pma_get_portcounters_cong(pmp, ibdev, port);
1730
1731         if (counter_select & IB_PMA_SEL_CONG_XMIT) {
1732                 spin_lock_irqsave(&ppd->ibport_data.lock, flags);
1733                 ppd->cong_stats.counter = 0;
1734                 dd->f_set_cntr_sample(ppd, QIB_CONG_TIMER_PSINTERVAL,
1735                                       0x0);
1736                 spin_unlock_irqrestore(&ppd->ibport_data.lock, flags);
1737         }
1738         if (counter_select & IB_PMA_SEL_CONG_PORT_DATA) {
1739                 ibp->z_port_xmit_data = cntrs.port_xmit_data;
1740                 ibp->z_port_rcv_data = cntrs.port_rcv_data;
1741                 ibp->z_port_xmit_packets = cntrs.port_xmit_packets;
1742                 ibp->z_port_rcv_packets = cntrs.port_rcv_packets;
1743         }
1744         if (counter_select & IB_PMA_SEL_CONG_ALL) {
1745                 ibp->z_symbol_error_counter =
1746                         cntrs.symbol_error_counter;
1747                 ibp->z_link_error_recovery_counter =
1748                         cntrs.link_error_recovery_counter;
1749                 ibp->z_link_downed_counter =
1750                         cntrs.link_downed_counter;
1751                 ibp->z_port_rcv_errors = cntrs.port_rcv_errors;
1752                 ibp->z_port_rcv_remphys_errors =
1753                         cntrs.port_rcv_remphys_errors;
1754                 ibp->z_port_xmit_discards =
1755                         cntrs.port_xmit_discards;
1756                 ibp->z_local_link_integrity_errors =
1757                         cntrs.local_link_integrity_errors;
1758                 ibp->z_excessive_buffer_overrun_errors =
1759                         cntrs.excessive_buffer_overrun_errors;
1760                 ibp->n_vl15_dropped = 0;
1761                 ibp->z_vl15_dropped = cntrs.vl15_dropped;
1762         }
1763
1764         return ret;
1765 }
1766
1767 static int pma_set_portcounters_ext(struct ib_perf *pmp,
1768                                     struct ib_device *ibdev, u8 port)
1769 {
1770         struct ib_pma_portcounters *p = (struct ib_pma_portcounters *)
1771                 pmp->data;
1772         struct qib_ibport *ibp = to_iport(ibdev, port);
1773         struct qib_pportdata *ppd = ppd_from_ibp(ibp);
1774         u64 swords, rwords, spkts, rpkts, xwait;
1775
1776         qib_snapshot_counters(ppd, &swords, &rwords, &spkts, &rpkts, &xwait);
1777
1778         if (p->counter_select & IB_PMA_SELX_PORT_XMIT_DATA)
1779                 ibp->z_port_xmit_data = swords;
1780
1781         if (p->counter_select & IB_PMA_SELX_PORT_RCV_DATA)
1782                 ibp->z_port_rcv_data = rwords;
1783
1784         if (p->counter_select & IB_PMA_SELX_PORT_XMIT_PACKETS)
1785                 ibp->z_port_xmit_packets = spkts;
1786
1787         if (p->counter_select & IB_PMA_SELX_PORT_RCV_PACKETS)
1788                 ibp->z_port_rcv_packets = rpkts;
1789
1790         if (p->counter_select & IB_PMA_SELX_PORT_UNI_XMIT_PACKETS)
1791                 ibp->n_unicast_xmit = 0;
1792
1793         if (p->counter_select & IB_PMA_SELX_PORT_UNI_RCV_PACKETS)
1794                 ibp->n_unicast_rcv = 0;
1795
1796         if (p->counter_select & IB_PMA_SELX_PORT_MULTI_XMIT_PACKETS)
1797                 ibp->n_multicast_xmit = 0;
1798
1799         if (p->counter_select & IB_PMA_SELX_PORT_MULTI_RCV_PACKETS)
1800                 ibp->n_multicast_rcv = 0;
1801
1802         return pma_get_portcounters_ext(pmp, ibdev, port);
1803 }
1804
1805 static int process_subn(struct ib_device *ibdev, int mad_flags,
1806                         u8 port, struct ib_mad *in_mad,
1807                         struct ib_mad *out_mad)
1808 {
1809         struct ib_smp *smp = (struct ib_smp *)out_mad;
1810         struct qib_ibport *ibp = to_iport(ibdev, port);
1811         struct qib_pportdata *ppd = ppd_from_ibp(ibp);
1812         int ret;
1813
1814         *out_mad = *in_mad;
1815         if (smp->class_version != 1) {
1816                 smp->status |= IB_SMP_UNSUP_VERSION;
1817                 ret = reply(smp);
1818                 goto bail;
1819         }
1820
1821         ret = check_mkey(ibp, smp, mad_flags);
1822         if (ret) {
1823                 u32 port_num = be32_to_cpu(smp->attr_mod);
1824
1825                 /*
1826                  * If this is a get/set portinfo, we already check the
1827                  * M_Key if the MAD is for another port and the M_Key
1828                  * is OK on the receiving port. This check is needed
1829                  * to increment the error counters when the M_Key
1830                  * fails to match on *both* ports.
1831                  */
1832                 if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO &&
1833                     (smp->method == IB_MGMT_METHOD_GET ||
1834                      smp->method == IB_MGMT_METHOD_SET) &&
1835                     port_num && port_num <= ibdev->phys_port_cnt &&
1836                     port != port_num)
1837                         (void) check_mkey(to_iport(ibdev, port_num), smp, 0);
1838                 goto bail;
1839         }
1840
1841         switch (smp->method) {
1842         case IB_MGMT_METHOD_GET:
1843                 switch (smp->attr_id) {
1844                 case IB_SMP_ATTR_NODE_DESC:
1845                         ret = subn_get_nodedescription(smp, ibdev);
1846                         goto bail;
1847                 case IB_SMP_ATTR_NODE_INFO:
1848                         ret = subn_get_nodeinfo(smp, ibdev, port);
1849                         goto bail;
1850                 case IB_SMP_ATTR_GUID_INFO:
1851                         ret = subn_get_guidinfo(smp, ibdev, port);
1852                         goto bail;
1853                 case IB_SMP_ATTR_PORT_INFO:
1854                         ret = subn_get_portinfo(smp, ibdev, port);
1855                         goto bail;
1856                 case IB_SMP_ATTR_PKEY_TABLE:
1857                         ret = subn_get_pkeytable(smp, ibdev, port);
1858                         goto bail;
1859                 case IB_SMP_ATTR_SL_TO_VL_TABLE:
1860                         ret = subn_get_sl_to_vl(smp, ibdev, port);
1861                         goto bail;
1862                 case IB_SMP_ATTR_VL_ARB_TABLE:
1863                         ret = subn_get_vl_arb(smp, ibdev, port);
1864                         goto bail;
1865                 case IB_SMP_ATTR_SM_INFO:
1866                         if (ibp->port_cap_flags & IB_PORT_SM_DISABLED) {
1867                                 ret = IB_MAD_RESULT_SUCCESS |
1868                                         IB_MAD_RESULT_CONSUMED;
1869                                 goto bail;
1870                         }
1871                         if (ibp->port_cap_flags & IB_PORT_SM) {
1872                                 ret = IB_MAD_RESULT_SUCCESS;
1873                                 goto bail;
1874                         }
1875                         /* FALLTHROUGH */
1876                 default:
1877                         smp->status |= IB_SMP_UNSUP_METH_ATTR;
1878                         ret = reply(smp);
1879                         goto bail;
1880                 }
1881
1882         case IB_MGMT_METHOD_SET:
1883                 switch (smp->attr_id) {
1884                 case IB_SMP_ATTR_GUID_INFO:
1885                         ret = subn_set_guidinfo(smp, ibdev, port);
1886                         goto bail;
1887                 case IB_SMP_ATTR_PORT_INFO:
1888                         ret = subn_set_portinfo(smp, ibdev, port);
1889                         goto bail;
1890                 case IB_SMP_ATTR_PKEY_TABLE:
1891                         ret = subn_set_pkeytable(smp, ibdev, port);
1892                         goto bail;
1893                 case IB_SMP_ATTR_SL_TO_VL_TABLE:
1894                         ret = subn_set_sl_to_vl(smp, ibdev, port);
1895                         goto bail;
1896                 case IB_SMP_ATTR_VL_ARB_TABLE:
1897                         ret = subn_set_vl_arb(smp, ibdev, port);
1898                         goto bail;
1899                 case IB_SMP_ATTR_SM_INFO:
1900                         if (ibp->port_cap_flags & IB_PORT_SM_DISABLED) {
1901                                 ret = IB_MAD_RESULT_SUCCESS |
1902                                         IB_MAD_RESULT_CONSUMED;
1903                                 goto bail;
1904                         }
1905                         if (ibp->port_cap_flags & IB_PORT_SM) {
1906                                 ret = IB_MAD_RESULT_SUCCESS;
1907                                 goto bail;
1908                         }
1909                         /* FALLTHROUGH */
1910                 default:
1911                         smp->status |= IB_SMP_UNSUP_METH_ATTR;
1912                         ret = reply(smp);
1913                         goto bail;
1914                 }
1915
1916         case IB_MGMT_METHOD_TRAP_REPRESS:
1917                 if (smp->attr_id == IB_SMP_ATTR_NOTICE)
1918                         ret = subn_trap_repress(smp, ibdev, port);
1919                 else {
1920                         smp->status |= IB_SMP_UNSUP_METH_ATTR;
1921                         ret = reply(smp);
1922                 }
1923                 goto bail;
1924
1925         case IB_MGMT_METHOD_TRAP:
1926         case IB_MGMT_METHOD_REPORT:
1927         case IB_MGMT_METHOD_REPORT_RESP:
1928         case IB_MGMT_METHOD_GET_RESP:
1929                 /*
1930                  * The ib_mad module will call us to process responses
1931                  * before checking for other consumers.
1932                  * Just tell the caller to process it normally.
1933                  */
1934                 ret = IB_MAD_RESULT_SUCCESS;
1935                 goto bail;
1936
1937         case IB_MGMT_METHOD_SEND:
1938                 if (ib_get_smp_direction(smp) &&
1939                     smp->attr_id == QIB_VENDOR_IPG) {
1940                         ppd->dd->f_set_ib_cfg(ppd, QIB_IB_CFG_PORT,
1941                                               smp->data[0]);
1942                         ret = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
1943                 } else
1944                         ret = IB_MAD_RESULT_SUCCESS;
1945                 goto bail;
1946
1947         default:
1948                 smp->status |= IB_SMP_UNSUP_METHOD;
1949                 ret = reply(smp);
1950         }
1951
1952 bail:
1953         return ret;
1954 }
1955
1956 static int process_perf(struct ib_device *ibdev, u8 port,
1957                         struct ib_mad *in_mad,
1958                         struct ib_mad *out_mad)
1959 {
1960         struct ib_perf *pmp = (struct ib_perf *)out_mad;
1961         int ret;
1962
1963         *out_mad = *in_mad;
1964         if (pmp->class_version != 1) {
1965                 pmp->status |= IB_SMP_UNSUP_VERSION;
1966                 ret = reply((struct ib_smp *) pmp);
1967                 goto bail;
1968         }
1969
1970         switch (pmp->method) {
1971         case IB_MGMT_METHOD_GET:
1972                 switch (pmp->attr_id) {
1973                 case IB_PMA_CLASS_PORT_INFO:
1974                         ret = pma_get_classportinfo(pmp, ibdev);
1975                         goto bail;
1976                 case IB_PMA_PORT_SAMPLES_CONTROL:
1977                         ret = pma_get_portsamplescontrol(pmp, ibdev, port);
1978                         goto bail;
1979                 case IB_PMA_PORT_SAMPLES_RESULT:
1980                         ret = pma_get_portsamplesresult(pmp, ibdev, port);
1981                         goto bail;
1982                 case IB_PMA_PORT_SAMPLES_RESULT_EXT:
1983                         ret = pma_get_portsamplesresult_ext(pmp, ibdev, port);
1984                         goto bail;
1985                 case IB_PMA_PORT_COUNTERS:
1986                         ret = pma_get_portcounters(pmp, ibdev, port);
1987                         goto bail;
1988                 case IB_PMA_PORT_COUNTERS_EXT:
1989                         ret = pma_get_portcounters_ext(pmp, ibdev, port);
1990                         goto bail;
1991                 case IB_PMA_PORT_COUNTERS_CONG:
1992                         ret = pma_get_portcounters_cong(pmp, ibdev, port);
1993                         goto bail;
1994                 default:
1995                         pmp->status |= IB_SMP_UNSUP_METH_ATTR;
1996                         ret = reply((struct ib_smp *) pmp);
1997                         goto bail;
1998                 }
1999
2000         case IB_MGMT_METHOD_SET:
2001                 switch (pmp->attr_id) {
2002                 case IB_PMA_PORT_SAMPLES_CONTROL:
2003                         ret = pma_set_portsamplescontrol(pmp, ibdev, port);
2004                         goto bail;
2005                 case IB_PMA_PORT_COUNTERS:
2006                         ret = pma_set_portcounters(pmp, ibdev, port);
2007                         goto bail;
2008                 case IB_PMA_PORT_COUNTERS_EXT:
2009                         ret = pma_set_portcounters_ext(pmp, ibdev, port);
2010                         goto bail;
2011                 case IB_PMA_PORT_COUNTERS_CONG:
2012                         ret = pma_set_portcounters_cong(pmp, ibdev, port);
2013                         goto bail;
2014                 default:
2015                         pmp->status |= IB_SMP_UNSUP_METH_ATTR;
2016                         ret = reply((struct ib_smp *) pmp);
2017                         goto bail;
2018                 }
2019
2020         case IB_MGMT_METHOD_TRAP:
2021         case IB_MGMT_METHOD_GET_RESP:
2022                 /*
2023                  * The ib_mad module will call us to process responses
2024                  * before checking for other consumers.
2025                  * Just tell the caller to process it normally.
2026                  */
2027                 ret = IB_MAD_RESULT_SUCCESS;
2028                 goto bail;
2029
2030         default:
2031                 pmp->status |= IB_SMP_UNSUP_METHOD;
2032                 ret = reply((struct ib_smp *) pmp);
2033         }
2034
2035 bail:
2036         return ret;
2037 }
2038
2039 /**
2040  * qib_process_mad - process an incoming MAD packet
2041  * @ibdev: the infiniband device this packet came in on
2042  * @mad_flags: MAD flags
2043  * @port: the port number this packet came in on
2044  * @in_wc: the work completion entry for this packet
2045  * @in_grh: the global route header for this packet
2046  * @in_mad: the incoming MAD
2047  * @out_mad: any outgoing MAD reply
2048  *
2049  * Returns IB_MAD_RESULT_SUCCESS if this is a MAD that we are not
2050  * interested in processing.
2051  *
2052  * Note that the verbs framework has already done the MAD sanity checks,
2053  * and hop count/pointer updating for IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
2054  * MADs.
2055  *
2056  * This is called by the ib_mad module.
2057  */
2058 int qib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port,
2059                     struct ib_wc *in_wc, struct ib_grh *in_grh,
2060                     struct ib_mad *in_mad, struct ib_mad *out_mad)
2061 {
2062         int ret;
2063
2064         switch (in_mad->mad_hdr.mgmt_class) {
2065         case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
2066         case IB_MGMT_CLASS_SUBN_LID_ROUTED:
2067                 ret = process_subn(ibdev, mad_flags, port, in_mad, out_mad);
2068                 goto bail;
2069
2070         case IB_MGMT_CLASS_PERF_MGMT:
2071                 ret = process_perf(ibdev, port, in_mad, out_mad);
2072                 goto bail;
2073
2074         default:
2075                 ret = IB_MAD_RESULT_SUCCESS;
2076         }
2077
2078 bail:
2079         return ret;
2080 }
2081
2082 static void send_handler(struct ib_mad_agent *agent,
2083                          struct ib_mad_send_wc *mad_send_wc)
2084 {
2085         ib_free_send_mad(mad_send_wc->send_buf);
2086 }
2087
2088 static void xmit_wait_timer_func(unsigned long opaque)
2089 {
2090         struct qib_pportdata *ppd = (struct qib_pportdata *)opaque;
2091         struct qib_devdata *dd = dd_from_ppd(ppd);
2092         unsigned long flags;
2093         u8 status;
2094
2095         spin_lock_irqsave(&ppd->ibport_data.lock, flags);
2096         if (ppd->cong_stats.flags == IB_PMA_CONG_HW_CONTROL_SAMPLE) {
2097                 status = dd->f_portcntr(ppd, QIBPORTCNTR_PSSTAT);
2098                 if (status == IB_PMA_SAMPLE_STATUS_DONE) {
2099                         /* save counter cache */
2100                         cache_hw_sample_counters(ppd);
2101                         ppd->cong_stats.flags = IB_PMA_CONG_HW_CONTROL_TIMER;
2102                 } else
2103                         goto done;
2104         }
2105         ppd->cong_stats.counter = xmit_wait_get_value_delta(ppd);
2106         dd->f_set_cntr_sample(ppd, QIB_CONG_TIMER_PSINTERVAL, 0x0);
2107 done:
2108         spin_unlock_irqrestore(&ppd->ibport_data.lock, flags);
2109         mod_timer(&ppd->cong_stats.timer, jiffies + HZ);
2110 }
2111
2112 int qib_create_agents(struct qib_ibdev *dev)
2113 {
2114         struct qib_devdata *dd = dd_from_dev(dev);
2115         struct ib_mad_agent *agent;
2116         struct qib_ibport *ibp;
2117         int p;
2118         int ret;
2119
2120         for (p = 0; p < dd->num_pports; p++) {
2121                 ibp = &dd->pport[p].ibport_data;
2122                 agent = ib_register_mad_agent(&dev->ibdev, p + 1, IB_QPT_SMI,
2123                                               NULL, 0, send_handler,
2124                                               NULL, NULL);
2125                 if (IS_ERR(agent)) {
2126                         ret = PTR_ERR(agent);
2127                         goto err;
2128                 }
2129
2130                 /* Initialize xmit_wait structure */
2131                 dd->pport[p].cong_stats.counter = 0;
2132                 init_timer(&dd->pport[p].cong_stats.timer);
2133                 dd->pport[p].cong_stats.timer.function = xmit_wait_timer_func;
2134                 dd->pport[p].cong_stats.timer.data =
2135                         (unsigned long)(&dd->pport[p]);
2136                 dd->pport[p].cong_stats.timer.expires = 0;
2137                 add_timer(&dd->pport[p].cong_stats.timer);
2138
2139                 ibp->send_agent = agent;
2140         }
2141
2142         return 0;
2143
2144 err:
2145         for (p = 0; p < dd->num_pports; p++) {
2146                 ibp = &dd->pport[p].ibport_data;
2147                 if (ibp->send_agent) {
2148                         agent = ibp->send_agent;
2149                         ibp->send_agent = NULL;
2150                         ib_unregister_mad_agent(agent);
2151                 }
2152         }
2153
2154         return ret;
2155 }
2156
2157 void qib_free_agents(struct qib_ibdev *dev)
2158 {
2159         struct qib_devdata *dd = dd_from_dev(dev);
2160         struct ib_mad_agent *agent;
2161         struct qib_ibport *ibp;
2162         int p;
2163
2164         for (p = 0; p < dd->num_pports; p++) {
2165                 ibp = &dd->pport[p].ibport_data;
2166                 if (ibp->send_agent) {
2167                         agent = ibp->send_agent;
2168                         ibp->send_agent = NULL;
2169                         ib_unregister_mad_agent(agent);
2170                 }
2171                 if (ibp->sm_ah) {
2172                         ib_destroy_ah(&ibp->sm_ah->ibah);
2173                         ibp->sm_ah = NULL;
2174                 }
2175                 if (dd->pport[p].cong_stats.timer.data)
2176                         del_timer_sync(&dd->pport[p].cong_stats.timer);
2177         }
2178 }