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                 goto err;
 672         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                 goto err;
 687         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                         goto err;
 711                 set_link_width_enabled(ppd, lwe);
 712         }
 713
 714         lse = pip->linkspeedactive_enabled & 0xF;
 715         if (lse) {
 716                 /*
 717                  * The IB 1.2 spec. only allows link speed values
 718                  * 1, 3, 5, 7, 15.  1.2.1 extended to allow specific
 719                  * speeds.
 720                  */
 721                 if (lse == 15)
 722                         lse = ppd->link_speed_supported;
 723                 else if (lse >= 8 || (lse & ~ppd->link_speed_supported))
 724                         goto err;
 725                 set_link_speed_enabled(ppd, lse);
 726         }
 727
 728         /* Set link down default state. */
 729         switch (pip->portphysstate_linkdown & 0xF) {
 730         case 0: /* NOP */
 731                 break;
 732         case 1: /* SLEEP */
 733                 (void) dd->f_set_ib_cfg(ppd, QIB_IB_CFG_LINKDEFAULT,
 734                                         IB_LINKINITCMD_SLEEP);
 735                 break;
 736         case 2: /* POLL */
 737                 (void) dd->f_set_ib_cfg(ppd, QIB_IB_CFG_LINKDEFAULT,
 738                                         IB_LINKINITCMD_POLL);
 739                 break;
 740         default:
 741                 goto err;
 742         }
 743
 744         ibp->mkeyprot = pip->mkeyprot_resv_lmc >> 6;
 745         ibp->vl_high_limit = pip->vl_high_limit;
 746         (void) dd->f_set_ib_cfg(ppd, QIB_IB_CFG_VL_HIGH_LIMIT,
 747                                     ibp->vl_high_limit);
 748
 749         mtu = ib_mtu_enum_to_int((pip->neighbormtu_mastersmsl >> 4) & 0xF);
 750         if (mtu == -1)
 751                 goto err;
 752         qib_set_mtu(ppd, mtu);
 753
 754         /* Set operational VLs */
 755         vls = (pip->operationalvl_pei_peo_fpi_fpo >> 4) & 0xF;
 756         if (vls) {
 757                 if (vls > ppd->vls_supported)
 758                         goto err;
 759                 (void) dd->f_set_ib_cfg(ppd, QIB_IB_CFG_OP_VLS, vls);
 760         }
 761
 762         if (pip->mkey_violations == 0)
 763                 ibp->mkey_violations = 0;
 764
 765         if (pip->pkey_violations == 0)
 766                 ibp->pkey_violations = 0;
 767
 768         if (pip->qkey_violations == 0)
 769                 ibp->qkey_violations = 0;
 770
 771         ore = pip->localphyerrors_overrunerrors;
 772         if (set_phyerrthreshold(ppd, (ore >> 4) & 0xF))
 773                 goto err;
 774
 775         if (set_overrunthreshold(ppd, (ore & 0xF)))
 776                 goto err;
 777
 778         ibp->subnet_timeout = pip->clientrereg_resv_subnetto & 0x1F;
 779
 780         if (pip->clientrereg_resv_subnetto & 0x80) {
 781                 clientrereg = 1;
 782                 event.event = IB_EVENT_CLIENT_REREGISTER;
 783                 ib_dispatch_event(&event);
 784         }
 785
 786         /*
 787          * Do the port state change now that the other link parameters
 788          * have been set.
 789          * Changing the port physical state only makes sense if the link
 790          * is down or is being set to down.
 791          */
 792         state = pip->linkspeed_portstate & 0xF;
 793         lstate = (pip->portphysstate_linkdown >> 4) & 0xF;
 794         if (lstate && !(state == IB_PORT_DOWN || state == IB_PORT_NOP))
 795                 goto err;
 796
 797         /*
 798          * Only state changes of DOWN, ARM, and ACTIVE are valid
 799          * and must be in the correct state to take effect (see 7.2.6).
 800          */
 801         switch (state) {
 802         case IB_PORT_NOP:
 803                 if (lstate == 0)
 804                         break;
 805                 /* FALLTHROUGH */
 806         case IB_PORT_DOWN:
 807                 if (lstate == 0)
 808                         lstate = QIB_IB_LINKDOWN_ONLY;
 809                 else if (lstate == 1)
 810                         lstate = QIB_IB_LINKDOWN_SLEEP;
 811                 else if (lstate == 2)
 812                         lstate = QIB_IB_LINKDOWN;
 813                 else if (lstate == 3)
 814                         lstate = QIB_IB_LINKDOWN_DISABLE;
 815                 else
 816                         goto err;
 817                 spin_lock_irqsave(&ppd->lflags_lock, flags);
 818                 ppd->lflags &= ~QIBL_LINKV;
 819                 spin_unlock_irqrestore(&ppd->lflags_lock, flags);
 820                 qib_set_linkstate(ppd, lstate);
 821                 /*
 822                  * Don't send a reply if the response would be sent
 823                  * through the disabled port.
 824                  */
 825                 if (lstate == QIB_IB_LINKDOWN_DISABLE && smp->hop_cnt) {
 826                         ret = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
 827                         goto done;
 828                 }
 829                 qib_wait_linkstate(ppd, QIBL_LINKV, 10);
 830                 break;
 831         case IB_PORT_ARMED:
 832                 qib_set_linkstate(ppd, QIB_IB_LINKARM);
 833                 break;
 834         case IB_PORT_ACTIVE:
 835                 qib_set_linkstate(ppd, QIB_IB_LINKACTIVE);
 836                 break;
 837         default:
 838                 /* XXX We have already partially updated our state! */
 839                 goto err;
 840         }
 841
 842         ret = subn_get_portinfo(smp, ibdev, port);
 843
 844         if (clientrereg)
 845                 pip->clientrereg_resv_subnetto |= 0x80;
 846
 847         goto done;
 848
 849 err:
 850         smp->status |= IB_SMP_INVALID_FIELD;
 851 get_only:
 852         ret = subn_get_portinfo(smp, ibdev, port);
 853 done:
 854         return ret;
 855 }
 856
 857 /**
 858  * rm_pkey - decrecment the reference count for the given PKEY
 859  * @dd: the qlogic_ib device
 860  * @key: the PKEY index
 861  *
 862  * Return true if this was the last reference and the hardware table entry
 863  * needs to be changed.
 864  */
 865 static int rm_pkey(struct qib_pportdata *ppd, u16 key)
 866 {
 867         int i;
 868         int ret;
 869
 870         for (i = 0; i < ARRAY_SIZE(ppd->pkeys); i++) {
 871                 if (ppd->pkeys[i] != key)
 872                         continue;
 873                 if (atomic_dec_and_test(&ppd->pkeyrefs[i])) {
 874                         ppd->pkeys[i] = 0;
 875                         ret = 1;
 876                         goto bail;
 877                 }
 878                 break;
 879         }
 880
 881         ret = 0;
 882
 883 bail:
 884         return ret;
 885 }
 886
 887 /**
 888  * add_pkey - add the given PKEY to the hardware table
 889  * @dd: the qlogic_ib device
 890  * @key: the PKEY
 891  *
 892  * Return an error code if unable to add the entry, zero if no change,
 893  * or 1 if the hardware PKEY register needs to be updated.
 894  */
 895 static int add_pkey(struct qib_pportdata *ppd, u16 key)
 896 {
 897         int i;
 898         u16 lkey = key & 0x7FFF;
 899         int any = 0;
 900         int ret;
 901
 902         if (lkey == 0x7FFF) {
 903                 ret = 0;
 904                 goto bail;
 905         }
 906
 907         /* Look for an empty slot or a matching PKEY. */
 908         for (i = 0; i < ARRAY_SIZE(ppd->pkeys); i++) {
 909                 if (!ppd->pkeys[i]) {
 910                         any++;
 911                         continue;
 912                 }
 913                 /* If it matches exactly, try to increment the ref count */
 914                 if (ppd->pkeys[i] == key) {
 915                         if (atomic_inc_return(&ppd->pkeyrefs[i]) > 1) {
 916                                 ret = 0;
 917                                 goto bail;
 918                         }
 919                         /* Lost the race. Look for an empty slot below. */
 920                         atomic_dec(&ppd->pkeyrefs[i]);
 921                         any++;
 922                 }
 923                 /*
 924                  * It makes no sense to have both the limited and unlimited
 925                  * PKEY set at the same time since the unlimited one will
 926                  * disable the limited one.
 927                  */
 928                 if ((ppd->pkeys[i] & 0x7FFF) == lkey) {
 929                         ret = -EEXIST;
 930                         goto bail;
 931                 }
 932         }
 933         if (!any) {
 934                 ret = -EBUSY;
 935                 goto bail;
 936         }
 937         for (i = 0; i < ARRAY_SIZE(ppd->pkeys); i++) {
 938                 if (!ppd->pkeys[i] &&
 939                     atomic_inc_return(&ppd->pkeyrefs[i]) == 1) {
 940                         /* for qibstats, etc. */
 941                         ppd->pkeys[i] = key;
 942                         ret = 1;
 943                         goto bail;
 944                 }
 945         }
 946         ret = -EBUSY;
 947
 948 bail:
 949         return ret;
 950 }
 951
 952 /**
 953  * set_pkeys - set the PKEY table for ctxt 0
 954  * @dd: the qlogic_ib device
 955  * @port: the IB port number
 956  * @pkeys: the PKEY table
 957  */
 958 static int set_pkeys(struct qib_devdata *dd, u8 port, u16 *pkeys)
 959 {
 960         struct qib_pportdata *ppd;
 961         struct qib_ctxtdata *rcd;
 962         int i;
 963         int changed = 0;
 964
 965         /*
 966          * IB port one/two always maps to context zero/one,
 967          * always a kernel context, no locking needed
 968          * If we get here with ppd setup, no need to check
 969          * that rcd is valid.
 970          */
 971         ppd = dd->pport + (port - 1);
 972         rcd = dd->rcd[ppd->hw_pidx];
 973
 974         for (i = 0; i < ARRAY_SIZE(rcd->pkeys); i++) {
 975                 u16 key = pkeys[i];
 976                 u16 okey = rcd->pkeys[i];
 977
 978                 if (key == okey)
 979                         continue;
 980                 /*
 981                  * The value of this PKEY table entry is changing.
 982                  * Remove the old entry in the hardware's array of PKEYs.
 983                  */
 984                 if (okey & 0x7FFF)
 985                         changed |= rm_pkey(ppd, okey);
 986                 if (key & 0x7FFF) {
 987                         int ret = add_pkey(ppd, key);
 988
 989                         if (ret < 0)
 990                                 key = 0;
 991                         else
 992                                 changed |= ret;
 993                 }
 994                 rcd->pkeys[i] = key;
 995         }
 996         if (changed) {
 997                 struct ib_event event;
 998
 999                 (void) dd->f_set_ib_cfg(ppd, QIB_IB_CFG_PKEYS, 0);
1000
1001                 event.event = IB_EVENT_PKEY_CHANGE;
1002                 event.device = &dd->verbs_dev.ibdev;
1003                 event.element.port_num = 1;
1004                 ib_dispatch_event(&event);
1005         }
1006         return 0;
1007 }
1008
1009 static int subn_set_pkeytable(struct ib_smp *smp, struct ib_device *ibdev,
1010                               u8 port)
1011 {
1012         u32 startpx = 32 * (be32_to_cpu(smp->attr_mod) & 0xffff);
1013         __be16 *p = (__be16 *) smp->data;
1014         u16 *q = (u16 *) smp->data;
1015         struct qib_devdata *dd = dd_from_ibdev(ibdev);
1016         unsigned i, n = qib_get_npkeys(dd);
1017
1018         for (i = 0; i < n; i++)
1019                 q[i] = be16_to_cpu(p[i]);
1020
1021         if (startpx != 0 || set_pkeys(dd, port, q) != 0)
1022                 smp->status |= IB_SMP_INVALID_FIELD;
1023
1024         return subn_get_pkeytable(smp, ibdev, port);
1025 }
1026
1027 static int subn_get_sl_to_vl(struct ib_smp *smp, struct ib_device *ibdev,
1028                              u8 port)
1029 {
1030         struct qib_ibport *ibp = to_iport(ibdev, port);
1031         u8 *p = (u8 *) smp->data;
1032         unsigned i;
1033
1034         memset(smp->data, 0, sizeof(smp->data));
1035
1036         if (!(ibp->port_cap_flags & IB_PORT_SL_MAP_SUP))
1037                 smp->status |= IB_SMP_UNSUP_METHOD;
1038         else
1039                 for (i = 0; i < ARRAY_SIZE(ibp->sl_to_vl); i += 2)
1040                         *p++ = (ibp->sl_to_vl[i] << 4) | ibp->sl_to_vl[i + 1];
1041
1042         return reply(smp);
1043 }
1044
1045 static int subn_set_sl_to_vl(struct ib_smp *smp, struct ib_device *ibdev,
1046                              u8 port)
1047 {
1048         struct qib_ibport *ibp = to_iport(ibdev, port);
1049         u8 *p = (u8 *) smp->data;
1050         unsigned i;
1051
1052         if (!(ibp->port_cap_flags & IB_PORT_SL_MAP_SUP)) {
1053                 smp->status |= IB_SMP_UNSUP_METHOD;
1054                 return reply(smp);
1055         }
1056
1057         for (i = 0; i < ARRAY_SIZE(ibp->sl_to_vl); i += 2, p++) {
1058                 ibp->sl_to_vl[i] = *p >> 4;
1059                 ibp->sl_to_vl[i + 1] = *p & 0xF;
1060         }
1061         qib_set_uevent_bits(ppd_from_ibp(to_iport(ibdev, port)),
1062                             _QIB_EVENT_SL2VL_CHANGE_BIT);
1063
1064         return subn_get_sl_to_vl(smp, ibdev, port);
1065 }
1066
1067 static int subn_get_vl_arb(struct ib_smp *smp, struct ib_device *ibdev,
1068                            u8 port)
1069 {
1070         unsigned which = be32_to_cpu(smp->attr_mod) >> 16;
1071         struct qib_pportdata *ppd = ppd_from_ibp(to_iport(ibdev, port));
1072
1073         memset(smp->data, 0, sizeof(smp->data));
1074
1075         if (ppd->vls_supported == IB_VL_VL0)
1076                 smp->status |= IB_SMP_UNSUP_METHOD;
1077         else if (which == IB_VLARB_LOWPRI_0_31)
1078                 (void) ppd->dd->f_get_ib_table(ppd, QIB_IB_TBL_VL_LOW_ARB,
1079                                                    smp->data);
1080         else if (which == IB_VLARB_HIGHPRI_0_31)
1081                 (void) ppd->dd->f_get_ib_table(ppd, QIB_IB_TBL_VL_HIGH_ARB,
1082                                                    smp->data);
1083         else
1084                 smp->status |= IB_SMP_INVALID_FIELD;
1085
1086         return reply(smp);
1087 }
1088
1089 static int subn_set_vl_arb(struct ib_smp *smp, struct ib_device *ibdev,
1090                            u8 port)
1091 {
1092         unsigned which = be32_to_cpu(smp->attr_mod) >> 16;
1093         struct qib_pportdata *ppd = ppd_from_ibp(to_iport(ibdev, port));
1094
1095         if (ppd->vls_supported == IB_VL_VL0)
1096                 smp->status |= IB_SMP_UNSUP_METHOD;
1097         else if (which == IB_VLARB_LOWPRI_0_31)
1098                 (void) ppd->dd->f_set_ib_table(ppd, QIB_IB_TBL_VL_LOW_ARB,
1099                                                    smp->data);
1100         else if (which == IB_VLARB_HIGHPRI_0_31)
1101                 (void) ppd->dd->f_set_ib_table(ppd, QIB_IB_TBL_VL_HIGH_ARB,
1102                                                    smp->data);
1103         else
1104                 smp->status |= IB_SMP_INVALID_FIELD;
1105
1106         return subn_get_vl_arb(smp, ibdev, port);
1107 }
1108
1109 static int subn_trap_repress(struct ib_smp *smp, struct ib_device *ibdev,
1110                              u8 port)
1111 {
1112         /*
1113          * For now, we only send the trap once so no need to process this.
1114          * o13-6, o13-7,
1115          * o14-3.a4 The SMA shall not send any message in response to a valid
1116          * SubnTrapRepress() message.
1117          */
1118         return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
1119 }
1120
1121 static int pma_get_classportinfo(struct ib_perf *pmp,
1122                                  struct ib_device *ibdev)
1123 {
1124         struct ib_pma_classportinfo *p =
1125                 (struct ib_pma_classportinfo *)pmp->data;
1126         struct qib_devdata *dd = dd_from_ibdev(ibdev);
1127
1128         memset(pmp->data, 0, sizeof(pmp->data));
1129
1130         if (pmp->attr_mod != 0)
1131                 pmp->status |= IB_SMP_INVALID_FIELD;
1132
1133         /* Note that AllPortSelect is not valid */
1134         p->base_version = 1;
1135         p->class_version = 1;
1136         p->cap_mask = IB_PMA_CLASS_CAP_EXT_WIDTH;
1137         /*
1138          * Set the most significant bit of CM2 to indicate support for
1139          * congestion statistics
1140          */
1141         p->reserved[0] = dd->psxmitwait_supported << 7;
1142         /*
1143          * Expected response time is 4.096 usec. * 2^18 == 1.073741824 sec.
1144          */
1145         p->resp_time_value = 18;
1146
1147         return reply((struct ib_smp *) pmp);
1148 }
1149
1150 static int pma_get_portsamplescontrol(struct ib_perf *pmp,
1151                                       struct ib_device *ibdev, u8 port)
1152 {
1153         struct ib_pma_portsamplescontrol *p =
1154                 (struct ib_pma_portsamplescontrol *)pmp->data;
1155         struct qib_ibdev *dev = to_idev(ibdev);
1156         struct qib_devdata *dd = dd_from_dev(dev);
1157         struct qib_ibport *ibp = to_iport(ibdev, port);
1158         struct qib_pportdata *ppd = ppd_from_ibp(ibp);
1159         unsigned long flags;
1160         u8 port_select = p->port_select;
1161
1162         memset(pmp->data, 0, sizeof(pmp->data));
1163
1164         p->port_select = port_select;
1165         if (pmp->attr_mod != 0 || port_select != port) {
1166                 pmp->status |= IB_SMP_INVALID_FIELD;
1167                 goto bail;
1168         }
1169         spin_lock_irqsave(&ibp->lock, flags);
1170         p->tick = dd->f_get_ib_cfg(ppd, QIB_IB_CFG_PMA_TICKS);
1171         p->sample_status = dd->f_portcntr(ppd, QIBPORTCNTR_PSSTAT);
1172         p->counter_width = 4;   /* 32 bit counters */
1173         p->counter_mask0_9 = COUNTER_MASK0_9;
1174         p->sample_start = cpu_to_be32(ibp->pma_sample_start);
1175         p->sample_interval = cpu_to_be32(ibp->pma_sample_interval);
1176         p->tag = cpu_to_be16(ibp->pma_tag);
1177         p->counter_select[0] = ibp->pma_counter_select[0];
1178         p->counter_select[1] = ibp->pma_counter_select[1];
1179         p->counter_select[2] = ibp->pma_counter_select[2];
1180         p->counter_select[3] = ibp->pma_counter_select[3];
1181         p->counter_select[4] = ibp->pma_counter_select[4];
1182         spin_unlock_irqrestore(&ibp->lock, flags);
1183
1184 bail:
1185         return reply((struct ib_smp *) pmp);
1186 }
1187
1188 static int pma_set_portsamplescontrol(struct ib_perf *pmp,
1189                                       struct ib_device *ibdev, u8 port)
1190 {
1191         struct ib_pma_portsamplescontrol *p =
1192                 (struct ib_pma_portsamplescontrol *)pmp->data;
1193         struct qib_ibdev *dev = to_idev(ibdev);
1194         struct qib_devdata *dd = dd_from_dev(dev);
1195         struct qib_ibport *ibp = to_iport(ibdev, port);
1196         struct qib_pportdata *ppd = ppd_from_ibp(ibp);
1197         unsigned long flags;
1198         u8 status, xmit_flags;
1199         int ret;
1200
1201         if (pmp->attr_mod != 0 || p->port_select != port) {
1202                 pmp->status |= IB_SMP_INVALID_FIELD;
1203                 ret = reply((struct ib_smp *) pmp);
1204                 goto bail;
1205         }
1206
1207         spin_lock_irqsave(&ibp->lock, flags);
1208
1209         /* Port Sampling code owns the PS* HW counters */
1210         xmit_flags = ppd->cong_stats.flags;
1211         ppd->cong_stats.flags = IB_PMA_CONG_HW_CONTROL_SAMPLE;
1212         status = dd->f_portcntr(ppd, QIBPORTCNTR_PSSTAT);
1213         if (status == IB_PMA_SAMPLE_STATUS_DONE ||
1214             (status == IB_PMA_SAMPLE_STATUS_RUNNING &&
1215              xmit_flags == IB_PMA_CONG_HW_CONTROL_TIMER)) {
1216                 ibp->pma_sample_start = be32_to_cpu(p->sample_start);
1217                 ibp->pma_sample_interval = be32_to_cpu(p->sample_interval);
1218                 ibp->pma_tag = be16_to_cpu(p->tag);
1219                 ibp->pma_counter_select[0] = p->counter_select[0];
1220                 ibp->pma_counter_select[1] = p->counter_select[1];
1221                 ibp->pma_counter_select[2] = p->counter_select[2];
1222                 ibp->pma_counter_select[3] = p->counter_select[3];
1223                 ibp->pma_counter_select[4] = p->counter_select[4];
1224                 dd->f_set_cntr_sample(ppd, ibp->pma_sample_interval,
1225                                       ibp->pma_sample_start);
1226         }
1227         spin_unlock_irqrestore(&ibp->lock, flags);
1228
1229         ret = pma_get_portsamplescontrol(pmp, ibdev, port);
1230
1231 bail:
1232         return ret;
1233 }
1234
1235 static u64 get_counter(struct qib_ibport *ibp, struct qib_pportdata *ppd,
1236                        __be16 sel)
1237 {
1238         u64 ret;
1239
1240         switch (sel) {
1241         case IB_PMA_PORT_XMIT_DATA:
1242                 ret = ppd->dd->f_portcntr(ppd, QIBPORTCNTR_PSXMITDATA);
1243                 break;
1244         case IB_PMA_PORT_RCV_DATA:
1245                 ret = ppd->dd->f_portcntr(ppd, QIBPORTCNTR_PSRCVDATA);
1246                 break;
1247         case IB_PMA_PORT_XMIT_PKTS:
1248                 ret = ppd->dd->f_portcntr(ppd, QIBPORTCNTR_PSXMITPKTS);
1249                 break;
1250         case IB_PMA_PORT_RCV_PKTS:
1251                 ret = ppd->dd->f_portcntr(ppd, QIBPORTCNTR_PSRCVPKTS);
1252                 break;
1253         case IB_PMA_PORT_XMIT_WAIT:
1254                 ret = ppd->dd->f_portcntr(ppd, QIBPORTCNTR_PSXMITWAIT);
1255                 break;
1256         default:
1257                 ret = 0;
1258         }
1259
1260         return ret;
1261 }
1262
1263 /* This function assumes that the xmit_wait lock is already held */
1264 static u64 xmit_wait_get_value_delta(struct qib_pportdata *ppd)
1265 {
1266         u32 delta;
1267
1268         delta = get_counter(&ppd->ibport_data, ppd,
1269                             IB_PMA_PORT_XMIT_WAIT);
1270         return ppd->cong_stats.counter + delta;
1271 }
1272
1273 static void cache_hw_sample_counters(struct qib_pportdata *ppd)
1274 {
1275         struct qib_ibport *ibp = &ppd->ibport_data;
1276
1277         ppd->cong_stats.counter_cache.psxmitdata =
1278                 get_counter(ibp, ppd, IB_PMA_PORT_XMIT_DATA);
1279         ppd->cong_stats.counter_cache.psrcvdata =
1280                 get_counter(ibp, ppd, IB_PMA_PORT_RCV_DATA);
1281         ppd->cong_stats.counter_cache.psxmitpkts =
1282                 get_counter(ibp, ppd, IB_PMA_PORT_XMIT_PKTS);
1283         ppd->cong_stats.counter_cache.psrcvpkts =
1284                 get_counter(ibp, ppd, IB_PMA_PORT_RCV_PKTS);
1285         ppd->cong_stats.counter_cache.psxmitwait =
1286                 get_counter(ibp, ppd, IB_PMA_PORT_XMIT_WAIT);
1287 }
1288
1289 static u64 get_cache_hw_sample_counters(struct qib_pportdata *ppd,
1290                                         __be16 sel)
1291 {
1292         u64 ret;
1293
1294         switch (sel) {
1295         case IB_PMA_PORT_XMIT_DATA:
1296                 ret = ppd->cong_stats.counter_cache.psxmitdata;
1297                 break;
1298         case IB_PMA_PORT_RCV_DATA:
1299                 ret = ppd->cong_stats.counter_cache.psrcvdata;
1300                 break;
1301         case IB_PMA_PORT_XMIT_PKTS:
1302                 ret = ppd->cong_stats.counter_cache.psxmitpkts;
1303                 break;
1304         case IB_PMA_PORT_RCV_PKTS:
1305                 ret = ppd->cong_stats.counter_cache.psrcvpkts;
1306                 break;
1307         case IB_PMA_PORT_XMIT_WAIT:
1308                 ret = ppd->cong_stats.counter_cache.psxmitwait;
1309                 break;
1310         default:
1311                 ret = 0;
1312         }
1313
1314         return ret;
1315 }
1316
1317 static int pma_get_portsamplesresult(struct ib_perf *pmp,
1318                                      struct ib_device *ibdev, u8 port)
1319 {
1320         struct ib_pma_portsamplesresult *p =
1321                 (struct ib_pma_portsamplesresult *)pmp->data;
1322         struct qib_ibdev *dev = to_idev(ibdev);
1323         struct qib_devdata *dd = dd_from_dev(dev);
1324         struct qib_ibport *ibp = to_iport(ibdev, port);
1325         struct qib_pportdata *ppd = ppd_from_ibp(ibp);
1326         unsigned long flags;
1327         u8 status;
1328         int i;
1329
1330         memset(pmp->data, 0, sizeof(pmp->data));
1331         spin_lock_irqsave(&ibp->lock, flags);
1332         p->tag = cpu_to_be16(ibp->pma_tag);
1333         if (ppd->cong_stats.flags == IB_PMA_CONG_HW_CONTROL_TIMER)
1334                 p->sample_status = IB_PMA_SAMPLE_STATUS_DONE;
1335         else {
1336                 status = dd->f_portcntr(ppd, QIBPORTCNTR_PSSTAT);
1337                 p->sample_status = cpu_to_be16(status);
1338                 if (status == IB_PMA_SAMPLE_STATUS_DONE) {
1339                         cache_hw_sample_counters(ppd);
1340                         ppd->cong_stats.counter =
1341                                 xmit_wait_get_value_delta(ppd);
1342                         dd->f_set_cntr_sample(ppd,
1343                                               QIB_CONG_TIMER_PSINTERVAL, 0);
1344                         ppd->cong_stats.flags = IB_PMA_CONG_HW_CONTROL_TIMER;
1345                 }
1346         }
1347         for (i = 0; i < ARRAY_SIZE(ibp->pma_counter_select); i++)
1348                 p->counter[i] = cpu_to_be32(
1349                         get_cache_hw_sample_counters(
1350                                 ppd, ibp->pma_counter_select[i]));
1351         spin_unlock_irqrestore(&ibp->lock, flags);
1352
1353         return reply((struct ib_smp *) pmp);
1354 }
1355
1356 static int pma_get_portsamplesresult_ext(struct ib_perf *pmp,
1357                                          struct ib_device *ibdev, u8 port)
1358 {
1359         struct ib_pma_portsamplesresult_ext *p =
1360                 (struct ib_pma_portsamplesresult_ext *)pmp->data;
1361         struct qib_ibdev *dev = to_idev(ibdev);
1362         struct qib_devdata *dd = dd_from_dev(dev);
1363         struct qib_ibport *ibp = to_iport(ibdev, port);
1364         struct qib_pportdata *ppd = ppd_from_ibp(ibp);
1365         unsigned long flags;
1366         u8 status;
1367         int i;
1368
1369         /* Port Sampling code owns the PS* HW counters */
1370         memset(pmp->data, 0, sizeof(pmp->data));
1371         spin_lock_irqsave(&ibp->lock, flags);
1372         p->tag = cpu_to_be16(ibp->pma_tag);
1373         if (ppd->cong_stats.flags == IB_PMA_CONG_HW_CONTROL_TIMER)
1374                 p->sample_status = IB_PMA_SAMPLE_STATUS_DONE;
1375         else {
1376                 status = dd->f_portcntr(ppd, QIBPORTCNTR_PSSTAT);
1377                 p->sample_status = cpu_to_be16(status);
1378                 /* 64 bits */
1379                 p->extended_width = cpu_to_be32(0x80000000);
1380                 if (status == IB_PMA_SAMPLE_STATUS_DONE) {
1381                         cache_hw_sample_counters(ppd);
1382                         ppd->cong_stats.counter =
1383                                 xmit_wait_get_value_delta(ppd);
1384                         dd->f_set_cntr_sample(ppd,
1385                                               QIB_CONG_TIMER_PSINTERVAL, 0);
1386                         ppd->cong_stats.flags = IB_PMA_CONG_HW_CONTROL_TIMER;
1387                 }
1388         }
1389         for (i = 0; i < ARRAY_SIZE(ibp->pma_counter_select); i++)
1390                 p->counter[i] = cpu_to_be64(
1391                         get_cache_hw_sample_counters(
1392                                 ppd, ibp->pma_counter_select[i]));
1393         spin_unlock_irqrestore(&ibp->lock, flags);
1394
1395         return reply((struct ib_smp *) pmp);
1396 }
1397
1398 static int pma_get_portcounters(struct ib_perf *pmp,
1399                                 struct ib_device *ibdev, u8 port)
1400 {
1401         struct ib_pma_portcounters *p = (struct ib_pma_portcounters *)
1402                 pmp->data;
1403         struct qib_ibport *ibp = to_iport(ibdev, port);
1404         struct qib_pportdata *ppd = ppd_from_ibp(ibp);
1405         struct qib_verbs_counters cntrs;
1406         u8 port_select = p->port_select;
1407
1408         qib_get_counters(ppd, &cntrs);
1409
1410         /* Adjust counters for any resets done. */
1411         cntrs.symbol_error_counter -= ibp->z_symbol_error_counter;
1412         cntrs.link_error_recovery_counter -=
1413                 ibp->z_link_error_recovery_counter;
1414         cntrs.link_downed_counter -= ibp->z_link_downed_counter;
1415         cntrs.port_rcv_errors -= ibp->z_port_rcv_errors;
1416         cntrs.port_rcv_remphys_errors -= ibp->z_port_rcv_remphys_errors;
1417         cntrs.port_xmit_discards -= ibp->z_port_xmit_discards;
1418         cntrs.port_xmit_data -= ibp->z_port_xmit_data;
1419         cntrs.port_rcv_data -= ibp->z_port_rcv_data;
1420         cntrs.port_xmit_packets -= ibp->z_port_xmit_packets;
1421         cntrs.port_rcv_packets -= ibp->z_port_rcv_packets;
1422         cntrs.local_link_integrity_errors -=
1423                 ibp->z_local_link_integrity_errors;
1424         cntrs.excessive_buffer_overrun_errors -=
1425                 ibp->z_excessive_buffer_overrun_errors;
1426         cntrs.vl15_dropped -= ibp->z_vl15_dropped;
1427         cntrs.vl15_dropped += ibp->n_vl15_dropped;
1428
1429         memset(pmp->data, 0, sizeof(pmp->data));
1430
1431         p->port_select = port_select;
1432         if (pmp->attr_mod != 0 || port_select != port)
1433                 pmp->status |= IB_SMP_INVALID_FIELD;
1434
1435         if (cntrs.symbol_error_counter > 0xFFFFUL)
1436                 p->symbol_error_counter = cpu_to_be16(0xFFFF);
1437         else
1438                 p->symbol_error_counter =
1439                         cpu_to_be16((u16)cntrs.symbol_error_counter);
1440         if (cntrs.link_error_recovery_counter > 0xFFUL)
1441                 p->link_error_recovery_counter = 0xFF;
1442         else
1443                 p->link_error_recovery_counter =
1444                         (u8)cntrs.link_error_recovery_counter;
1445         if (cntrs.link_downed_counter > 0xFFUL)
1446                 p->link_downed_counter = 0xFF;
1447         else
1448                 p->link_downed_counter = (u8)cntrs.link_downed_counter;
1449         if (cntrs.port_rcv_errors > 0xFFFFUL)
1450                 p->port_rcv_errors = cpu_to_be16(0xFFFF);
1451         else
1452                 p->port_rcv_errors =
1453                         cpu_to_be16((u16) cntrs.port_rcv_errors);
1454         if (cntrs.port_rcv_remphys_errors > 0xFFFFUL)
1455                 p->port_rcv_remphys_errors = cpu_to_be16(0xFFFF);
1456         else
1457                 p->port_rcv_remphys_errors =
1458                         cpu_to_be16((u16)cntrs.port_rcv_remphys_errors);
1459         if (cntrs.port_xmit_discards > 0xFFFFUL)
1460                 p->port_xmit_discards = cpu_to_be16(0xFFFF);
1461         else
1462                 p->port_xmit_discards =
1463                         cpu_to_be16((u16)cntrs.port_xmit_discards);
1464         if (cntrs.local_link_integrity_errors > 0xFUL)
1465                 cntrs.local_link_integrity_errors = 0xFUL;
1466         if (cntrs.excessive_buffer_overrun_errors > 0xFUL)
1467                 cntrs.excessive_buffer_overrun_errors = 0xFUL;
1468         p->lli_ebor_errors = (cntrs.local_link_integrity_errors << 4) |
1469                 cntrs.excessive_buffer_overrun_errors;
1470         if (cntrs.vl15_dropped > 0xFFFFUL)
1471                 p->vl15_dropped = cpu_to_be16(0xFFFF);
1472         else
1473                 p->vl15_dropped = cpu_to_be16((u16)cntrs.vl15_dropped);
1474         if (cntrs.port_xmit_data > 0xFFFFFFFFUL)
1475                 p->port_xmit_data = cpu_to_be32(0xFFFFFFFF);
1476         else
1477                 p->port_xmit_data = cpu_to_be32((u32)cntrs.port_xmit_data);
1478         if (cntrs.port_rcv_data > 0xFFFFFFFFUL)
1479                 p->port_rcv_data = cpu_to_be32(0xFFFFFFFF);
1480         else
1481                 p->port_rcv_data = cpu_to_be32((u32)cntrs.port_rcv_data);
1482         if (cntrs.port_xmit_packets > 0xFFFFFFFFUL)
1483                 p->port_xmit_packets = cpu_to_be32(0xFFFFFFFF);
1484         else
1485                 p->port_xmit_packets =
1486                         cpu_to_be32((u32)cntrs.port_xmit_packets);
1487         if (cntrs.port_rcv_packets > 0xFFFFFFFFUL)
1488                 p->port_rcv_packets = cpu_to_be32(0xFFFFFFFF);
1489         else
1490                 p->port_rcv_packets =
1491                         cpu_to_be32((u32) cntrs.port_rcv_packets);
1492
1493         return reply((struct ib_smp *) pmp);
1494 }
1495
1496 static int pma_get_portcounters_cong(struct ib_perf *pmp,
1497                                      struct ib_device *ibdev, u8 port)
1498 {
1499         /* Congestion PMA packets start at offset 24 not 64 */
1500         struct ib_pma_portcounters_cong *p =
1501                 (struct ib_pma_portcounters_cong *)pmp->reserved;
1502         struct qib_verbs_counters cntrs;
1503         struct qib_ibport *ibp = to_iport(ibdev, port);
1504         struct qib_pportdata *ppd = ppd_from_ibp(ibp);
1505         struct qib_devdata *dd = dd_from_ppd(ppd);
1506         u32 port_select = be32_to_cpu(pmp->attr_mod) & 0xFF;
1507         u64 xmit_wait_counter;
1508         unsigned long flags;
1509
1510         /*
1511          * This check is performed only in the GET method because the
1512          * SET method ends up calling this anyway.
1513          */
1514         if (!dd->psxmitwait_supported)
1515                 pmp->status |= IB_SMP_UNSUP_METH_ATTR;
1516         if (port_select != port)
1517                 pmp->status |= IB_SMP_INVALID_FIELD;
1518
1519         qib_get_counters(ppd, &cntrs);
1520         spin_lock_irqsave(&ppd->ibport_data.lock, flags);
1521         xmit_wait_counter = xmit_wait_get_value_delta(ppd);
1522         spin_unlock_irqrestore(&ppd->ibport_data.lock, flags);
1523
1524         /* Adjust counters for any resets done. */
1525         cntrs.symbol_error_counter -= ibp->z_symbol_error_counter;
1526         cntrs.link_error_recovery_counter -=
1527                 ibp->z_link_error_recovery_counter;
1528         cntrs.link_downed_counter -= ibp->z_link_downed_counter;
1529         cntrs.port_rcv_errors -= ibp->z_port_rcv_errors;
1530         cntrs.port_rcv_remphys_errors -=
1531                 ibp->z_port_rcv_remphys_errors;
1532         cntrs.port_xmit_discards -= ibp->z_port_xmit_discards;
1533         cntrs.local_link_integrity_errors -=
1534                 ibp->z_local_link_integrity_errors;
1535         cntrs.excessive_buffer_overrun_errors -=
1536                 ibp->z_excessive_buffer_overrun_errors;
1537         cntrs.vl15_dropped -= ibp->z_vl15_dropped;
1538         cntrs.vl15_dropped += ibp->n_vl15_dropped;
1539         cntrs.port_xmit_data -= ibp->z_port_xmit_data;
1540         cntrs.port_rcv_data -= ibp->z_port_rcv_data;
1541         cntrs.port_xmit_packets -= ibp->z_port_xmit_packets;
1542         cntrs.port_rcv_packets -= ibp->z_port_rcv_packets;
1543
1544         memset(pmp->reserved, 0, sizeof(pmp->reserved) +
1545                sizeof(pmp->data));
1546
1547         /*
1548          * Set top 3 bits to indicate interval in picoseconds in
1549          * remaining bits.
1550          */
1551         p->port_check_rate =
1552                 cpu_to_be16((QIB_XMIT_RATE_PICO << 13) |
1553                             (dd->psxmitwait_check_rate &
1554                              ~(QIB_XMIT_RATE_PICO << 13)));
1555         p->port_adr_events = cpu_to_be64(0);
1556         p->port_xmit_wait = cpu_to_be64(xmit_wait_counter);
1557         p->port_xmit_data = cpu_to_be64(cntrs.port_xmit_data);
1558         p->port_rcv_data = cpu_to_be64(cntrs.port_rcv_data);
1559         p->port_xmit_packets =
1560                 cpu_to_be64(cntrs.port_xmit_packets);
1561         p->port_rcv_packets =
1562                 cpu_to_be64(cntrs.port_rcv_packets);
1563         if (cntrs.symbol_error_counter > 0xFFFFUL)
1564                 p->symbol_error_counter = cpu_to_be16(0xFFFF);
1565         else
1566                 p->symbol_error_counter =
1567                         cpu_to_be16(
1568                                 (u16)cntrs.symbol_error_counter);
1569         if (cntrs.link_error_recovery_counter > 0xFFUL)
1570                 p->link_error_recovery_counter = 0xFF;
1571         else
1572                 p->link_error_recovery_counter =
1573                         (u8)cntrs.link_error_recovery_counter;
1574         if (cntrs.link_downed_counter > 0xFFUL)
1575                 p->link_downed_counter = 0xFF;
1576         else
1577                 p->link_downed_counter =
1578                         (u8)cntrs.link_downed_counter;
1579         if (cntrs.port_rcv_errors > 0xFFFFUL)
1580                 p->port_rcv_errors = cpu_to_be16(0xFFFF);
1581         else
1582                 p->port_rcv_errors =
1583                         cpu_to_be16((u16) cntrs.port_rcv_errors);
1584         if (cntrs.port_rcv_remphys_errors > 0xFFFFUL)
1585                 p->port_rcv_remphys_errors = cpu_to_be16(0xFFFF);
1586         else
1587                 p->port_rcv_remphys_errors =
1588                         cpu_to_be16(
1589                                 (u16)cntrs.port_rcv_remphys_errors);
1590         if (cntrs.port_xmit_discards > 0xFFFFUL)
1591                 p->port_xmit_discards = cpu_to_be16(0xFFFF);
1592         else
1593                 p->port_xmit_discards =
1594                         cpu_to_be16((u16)cntrs.port_xmit_discards);
1595         if (cntrs.local_link_integrity_errors > 0xFUL)
1596                 cntrs.local_link_integrity_errors = 0xFUL;
1597         if (cntrs.excessive_buffer_overrun_errors > 0xFUL)
1598                 cntrs.excessive_buffer_overrun_errors = 0xFUL;
1599         p->lli_ebor_errors = (cntrs.local_link_integrity_errors << 4) |
1600                 cntrs.excessive_buffer_overrun_errors;
1601         if (cntrs.vl15_dropped > 0xFFFFUL)
1602                 p->vl15_dropped = cpu_to_be16(0xFFFF);
1603         else
1604                 p->vl15_dropped = cpu_to_be16((u16)cntrs.vl15_dropped);
1605
1606         return reply((struct ib_smp *)pmp);
1607 }
1608
1609 static int pma_get_portcounters_ext(struct ib_perf *pmp,
1610                                     struct ib_device *ibdev, u8 port)
1611 {
1612         struct ib_pma_portcounters_ext *p =
1613                 (struct ib_pma_portcounters_ext *)pmp->data;
1614         struct qib_ibport *ibp = to_iport(ibdev, port);
1615         struct qib_pportdata *ppd = ppd_from_ibp(ibp);
1616         u64 swords, rwords, spkts, rpkts, xwait;
1617         u8 port_select = p->port_select;
1618
1619         memset(pmp->data, 0, sizeof(pmp->data));
1620
1621         p->port_select = port_select;
1622         if (pmp->attr_mod != 0 || port_select != port) {
1623                 pmp->status |= IB_SMP_INVALID_FIELD;
1624                 goto bail;
1625         }
1626
1627         qib_snapshot_counters(ppd, &swords, &rwords, &spkts, &rpkts, &xwait);
1628
1629         /* Adjust counters for any resets done. */
1630         swords -= ibp->z_port_xmit_data;
1631         rwords -= ibp->z_port_rcv_data;
1632         spkts -= ibp->z_port_xmit_packets;
1633         rpkts -= ibp->z_port_rcv_packets;
1634
1635         p->port_xmit_data = cpu_to_be64(swords);
1636         p->port_rcv_data = cpu_to_be64(rwords);
1637         p->port_xmit_packets = cpu_to_be64(spkts);
1638         p->port_rcv_packets = cpu_to_be64(rpkts);
1639         p->port_unicast_xmit_packets = cpu_to_be64(ibp->n_unicast_xmit);
1640         p->port_unicast_rcv_packets = cpu_to_be64(ibp->n_unicast_rcv);
1641         p->port_multicast_xmit_packets = cpu_to_be64(ibp->n_multicast_xmit);
1642         p->port_multicast_rcv_packets = cpu_to_be64(ibp->n_multicast_rcv);
1643
1644 bail:
1645         return reply((struct ib_smp *) pmp);
1646 }
1647
1648 static int pma_set_portcounters(struct ib_perf *pmp,
1649                                 struct ib_device *ibdev, u8 port)
1650 {
1651         struct ib_pma_portcounters *p = (struct ib_pma_portcounters *)
1652                 pmp->data;
1653         struct qib_ibport *ibp = to_iport(ibdev, port);
1654         struct qib_pportdata *ppd = ppd_from_ibp(ibp);
1655         struct qib_verbs_counters cntrs;
1656
1657         /*
1658          * Since the HW doesn't support clearing counters, we save the
1659          * current count and subtract it from future responses.
1660          */
1661         qib_get_counters(ppd, &cntrs);
1662
1663         if (p->counter_select & IB_PMA_SEL_SYMBOL_ERROR)
1664                 ibp->z_symbol_error_counter = cntrs.symbol_error_counter;
1665
1666         if (p->counter_select & IB_PMA_SEL_LINK_ERROR_RECOVERY)
1667                 ibp->z_link_error_recovery_counter =
1668                         cntrs.link_error_recovery_counter;
1669
1670         if (p->counter_select & IB_PMA_SEL_LINK_DOWNED)
1671                 ibp->z_link_downed_counter = cntrs.link_downed_counter;
1672
1673         if (p->counter_select & IB_PMA_SEL_PORT_RCV_ERRORS)
1674                 ibp->z_port_rcv_errors = cntrs.port_rcv_errors;
1675
1676         if (p->counter_select & IB_PMA_SEL_PORT_RCV_REMPHYS_ERRORS)
1677                 ibp->z_port_rcv_remphys_errors =
1678                         cntrs.port_rcv_remphys_errors;
1679
1680         if (p->counter_select & IB_PMA_SEL_PORT_XMIT_DISCARDS)
1681                 ibp->z_port_xmit_discards = cntrs.port_xmit_discards;
1682
1683         if (p->counter_select & IB_PMA_SEL_LOCAL_LINK_INTEGRITY_ERRORS)
1684                 ibp->z_local_link_integrity_errors =
1685                         cntrs.local_link_integrity_errors;
1686
1687         if (p->counter_select & IB_PMA_SEL_EXCESSIVE_BUFFER_OVERRUNS)
1688                 ibp->z_excessive_buffer_overrun_errors =
1689                         cntrs.excessive_buffer_overrun_errors;
1690
1691         if (p->counter_select & IB_PMA_SEL_PORT_VL15_DROPPED) {
1692                 ibp->n_vl15_dropped = 0;
1693                 ibp->z_vl15_dropped = cntrs.vl15_dropped;
1694         }
1695
1696         if (p->counter_select & IB_PMA_SEL_PORT_XMIT_DATA)
1697                 ibp->z_port_xmit_data = cntrs.port_xmit_data;
1698
1699         if (p->counter_select & IB_PMA_SEL_PORT_RCV_DATA)
1700                 ibp->z_port_rcv_data = cntrs.port_rcv_data;
1701
1702         if (p->counter_select & IB_PMA_SEL_PORT_XMIT_PACKETS)
1703                 ibp->z_port_xmit_packets = cntrs.port_xmit_packets;
1704
1705         if (p->counter_select & IB_PMA_SEL_PORT_RCV_PACKETS)
1706                 ibp->z_port_rcv_packets = cntrs.port_rcv_packets;
1707
1708         return pma_get_portcounters(pmp, ibdev, port);
1709 }
1710
1711 static int pma_set_portcounters_cong(struct ib_perf *pmp,
1712                                      struct ib_device *ibdev, u8 port)
1713 {
1714         struct qib_ibport *ibp = to_iport(ibdev, port);
1715         struct qib_pportdata *ppd = ppd_from_ibp(ibp);
1716         struct qib_devdata *dd = dd_from_ppd(ppd);
1717         struct qib_verbs_counters cntrs;
1718         u32 counter_select = (be32_to_cpu(pmp->attr_mod) >> 24) & 0xFF;
1719         int ret = 0;
1720         unsigned long flags;
1721
1722         qib_get_counters(ppd, &cntrs);
1723         /* Get counter values before we save them */
1724         ret = pma_get_portcounters_cong(pmp, ibdev, port);
1725
1726         if (counter_select & IB_PMA_SEL_CONG_XMIT) {
1727                 spin_lock_irqsave(&ppd->ibport_data.lock, flags);
1728                 ppd->cong_stats.counter = 0;
1729                 dd->f_set_cntr_sample(ppd, QIB_CONG_TIMER_PSINTERVAL,
1730                                       0x0);
1731                 spin_unlock_irqrestore(&ppd->ibport_data.lock, flags);
1732         }
1733         if (counter_select & IB_PMA_SEL_CONG_PORT_DATA) {
1734                 ibp->z_port_xmit_data = cntrs.port_xmit_data;
1735                 ibp->z_port_rcv_data = cntrs.port_rcv_data;
1736                 ibp->z_port_xmit_packets = cntrs.port_xmit_packets;
1737                 ibp->z_port_rcv_packets = cntrs.port_rcv_packets;
1738         }
1739         if (counter_select & IB_PMA_SEL_CONG_ALL) {
1740                 ibp->z_symbol_error_counter =
1741                         cntrs.symbol_error_counter;
1742                 ibp->z_link_error_recovery_counter =
1743                         cntrs.link_error_recovery_counter;
1744                 ibp->z_link_downed_counter =
1745                         cntrs.link_downed_counter;
1746                 ibp->z_port_rcv_errors = cntrs.port_rcv_errors;
1747                 ibp->z_port_rcv_remphys_errors =
1748                         cntrs.port_rcv_remphys_errors;
1749                 ibp->z_port_xmit_discards =
1750                         cntrs.port_xmit_discards;
1751                 ibp->z_local_link_integrity_errors =
1752                         cntrs.local_link_integrity_errors;
1753                 ibp->z_excessive_buffer_overrun_errors =
1754                         cntrs.excessive_buffer_overrun_errors;
1755                 ibp->n_vl15_dropped = 0;
1756                 ibp->z_vl15_dropped = cntrs.vl15_dropped;
1757         }
1758
1759         return ret;
1760 }
1761
1762 static int pma_set_portcounters_ext(struct ib_perf *pmp,
1763                                     struct ib_device *ibdev, u8 port)
1764 {
1765         struct ib_pma_portcounters *p = (struct ib_pma_portcounters *)
1766                 pmp->data;
1767         struct qib_ibport *ibp = to_iport(ibdev, port);
1768         struct qib_pportdata *ppd = ppd_from_ibp(ibp);
1769         u64 swords, rwords, spkts, rpkts, xwait;
1770
1771         qib_snapshot_counters(ppd, &swords, &rwords, &spkts, &rpkts, &xwait);
1772
1773         if (p->counter_select & IB_PMA_SELX_PORT_XMIT_DATA)
1774                 ibp->z_port_xmit_data = swords;
1775
1776         if (p->counter_select & IB_PMA_SELX_PORT_RCV_DATA)
1777                 ibp->z_port_rcv_data = rwords;
1778
1779         if (p->counter_select & IB_PMA_SELX_PORT_XMIT_PACKETS)
1780                 ibp->z_port_xmit_packets = spkts;
1781
1782         if (p->counter_select & IB_PMA_SELX_PORT_RCV_PACKETS)
1783                 ibp->z_port_rcv_packets = rpkts;
1784
1785         if (p->counter_select & IB_PMA_SELX_PORT_UNI_XMIT_PACKETS)
1786                 ibp->n_unicast_xmit = 0;
1787
1788         if (p->counter_select & IB_PMA_SELX_PORT_UNI_RCV_PACKETS)
1789                 ibp->n_unicast_rcv = 0;
1790
1791         if (p->counter_select & IB_PMA_SELX_PORT_MULTI_XMIT_PACKETS)
1792                 ibp->n_multicast_xmit = 0;
1793
1794         if (p->counter_select & IB_PMA_SELX_PORT_MULTI_RCV_PACKETS)
1795                 ibp->n_multicast_rcv = 0;
1796
1797         return pma_get_portcounters_ext(pmp, ibdev, port);
1798 }
1799
1800 static int process_subn(struct ib_device *ibdev, int mad_flags,
1801                         u8 port, struct ib_mad *in_mad,
1802                         struct ib_mad *out_mad)
1803 {
1804         struct ib_smp *smp = (struct ib_smp *)out_mad;
1805         struct qib_ibport *ibp = to_iport(ibdev, port);
1806         struct qib_pportdata *ppd = ppd_from_ibp(ibp);
1807         int ret;
1808
1809         *out_mad = *in_mad;
1810         if (smp->class_version != 1) {
1811                 smp->status |= IB_SMP_UNSUP_VERSION;
1812                 ret = reply(smp);
1813                 goto bail;
1814         }
1815
1816         ret = check_mkey(ibp, smp, mad_flags);
1817         if (ret) {
1818                 u32 port_num = be32_to_cpu(smp->attr_mod);
1819
1820                 /*
1821                  * If this is a get/set portinfo, we already check the
1822                  * M_Key if the MAD is for another port and the M_Key
1823                  * is OK on the receiving port. This check is needed
1824                  * to increment the error counters when the M_Key
1825                  * fails to match on *both* ports.
1826                  */
1827                 if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO &&
1828                     (smp->method == IB_MGMT_METHOD_GET ||
1829                      smp->method == IB_MGMT_METHOD_SET) &&
1830                     port_num && port_num <= ibdev->phys_port_cnt &&
1831                     port != port_num)
1832                         (void) check_mkey(to_iport(ibdev, port_num), smp, 0);
1833                 goto bail;
1834         }
1835
1836         switch (smp->method) {
1837         case IB_MGMT_METHOD_GET:
1838                 switch (smp->attr_id) {
1839                 case IB_SMP_ATTR_NODE_DESC:
1840                         ret = subn_get_nodedescription(smp, ibdev);
1841                         goto bail;
1842                 case IB_SMP_ATTR_NODE_INFO:
1843                         ret = subn_get_nodeinfo(smp, ibdev, port);
1844                         goto bail;
1845                 case IB_SMP_ATTR_GUID_INFO:
1846                         ret = subn_get_guidinfo(smp, ibdev, port);
1847                         goto bail;
1848                 case IB_SMP_ATTR_PORT_INFO:
1849                         ret = subn_get_portinfo(smp, ibdev, port);
1850                         goto bail;
1851                 case IB_SMP_ATTR_PKEY_TABLE:
1852                         ret = subn_get_pkeytable(smp, ibdev, port);
1853                         goto bail;
1854                 case IB_SMP_ATTR_SL_TO_VL_TABLE:
1855                         ret = subn_get_sl_to_vl(smp, ibdev, port);
1856                         goto bail;
1857                 case IB_SMP_ATTR_VL_ARB_TABLE:
1858                         ret = subn_get_vl_arb(smp, ibdev, port);
1859                         goto bail;
1860                 case IB_SMP_ATTR_SM_INFO:
1861                         if (ibp->port_cap_flags & IB_PORT_SM_DISABLED) {
1862                                 ret = IB_MAD_RESULT_SUCCESS |
1863                                         IB_MAD_RESULT_CONSUMED;
1864                                 goto bail;
1865                         }
1866                         if (ibp->port_cap_flags & IB_PORT_SM) {
1867                                 ret = IB_MAD_RESULT_SUCCESS;
1868                                 goto bail;
1869                         }
1870                         /* FALLTHROUGH */
1871                 default:
1872                         smp->status |= IB_SMP_UNSUP_METH_ATTR;
1873                         ret = reply(smp);
1874                         goto bail;
1875                 }
1876
1877         case IB_MGMT_METHOD_SET:
1878                 switch (smp->attr_id) {
1879                 case IB_SMP_ATTR_GUID_INFO:
1880                         ret = subn_set_guidinfo(smp, ibdev, port);
1881                         goto bail;
1882                 case IB_SMP_ATTR_PORT_INFO:
1883                         ret = subn_set_portinfo(smp, ibdev, port);
1884                         goto bail;
1885                 case IB_SMP_ATTR_PKEY_TABLE:
1886                         ret = subn_set_pkeytable(smp, ibdev, port);
1887                         goto bail;
1888                 case IB_SMP_ATTR_SL_TO_VL_TABLE:
1889                         ret = subn_set_sl_to_vl(smp, ibdev, port);
1890                         goto bail;
1891                 case IB_SMP_ATTR_VL_ARB_TABLE:
1892                         ret = subn_set_vl_arb(smp, ibdev, port);
1893                         goto bail;
1894                 case IB_SMP_ATTR_SM_INFO:
1895                         if (ibp->port_cap_flags & IB_PORT_SM_DISABLED) {
1896                                 ret = IB_MAD_RESULT_SUCCESS |
1897                                         IB_MAD_RESULT_CONSUMED;
1898                                 goto bail;
1899                         }
1900                         if (ibp->port_cap_flags & IB_PORT_SM) {
1901                                 ret = IB_MAD_RESULT_SUCCESS;
1902                                 goto bail;
1903                         }
1904                         /* FALLTHROUGH */
1905                 default:
1906                         smp->status |= IB_SMP_UNSUP_METH_ATTR;
1907                         ret = reply(smp);
1908                         goto bail;
1909                 }
1910
1911         case IB_MGMT_METHOD_TRAP_REPRESS:
1912                 if (smp->attr_id == IB_SMP_ATTR_NOTICE)
1913                         ret = subn_trap_repress(smp, ibdev, port);
1914                 else {
1915                         smp->status |= IB_SMP_UNSUP_METH_ATTR;
1916                         ret = reply(smp);
1917                 }
1918                 goto bail;
1919
1920         case IB_MGMT_METHOD_TRAP:
1921         case IB_MGMT_METHOD_REPORT:
1922         case IB_MGMT_METHOD_REPORT_RESP:
1923         case IB_MGMT_METHOD_GET_RESP:
1924                 /*
1925                  * The ib_mad module will call us to process responses
1926                  * before checking for other consumers.
1927                  * Just tell the caller to process it normally.
1928                  */
1929                 ret = IB_MAD_RESULT_SUCCESS;
1930                 goto bail;
1931
1932         case IB_MGMT_METHOD_SEND:
1933                 if (ib_get_smp_direction(smp) &&
1934                     smp->attr_id == QIB_VENDOR_IPG) {
1935                         ppd->dd->f_set_ib_cfg(ppd, QIB_IB_CFG_PORT,
1936                                               smp->data[0]);
1937                         ret = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
1938                 } else
1939                         ret = IB_MAD_RESULT_SUCCESS;
1940                 goto bail;
1941
1942         default:
1943                 smp->status |= IB_SMP_UNSUP_METHOD;
1944                 ret = reply(smp);
1945         }
1946
1947 bail:
1948         return ret;
1949 }
1950
1951 static int process_perf(struct ib_device *ibdev, u8 port,
1952                         struct ib_mad *in_mad,
1953                         struct ib_mad *out_mad)
1954 {
1955         struct ib_perf *pmp = (struct ib_perf *)out_mad;
1956         int ret;
1957
1958         *out_mad = *in_mad;
1959         if (pmp->class_version != 1) {
1960                 pmp->status |= IB_SMP_UNSUP_VERSION;
1961                 ret = reply((struct ib_smp *) pmp);
1962                 goto bail;
1963         }
1964
1965         switch (pmp->method) {
1966         case IB_MGMT_METHOD_GET:
1967                 switch (pmp->attr_id) {
1968                 case IB_PMA_CLASS_PORT_INFO:
1969                         ret = pma_get_classportinfo(pmp, ibdev);
1970                         goto bail;
1971                 case IB_PMA_PORT_SAMPLES_CONTROL:
1972                         ret = pma_get_portsamplescontrol(pmp, ibdev, port);
1973                         goto bail;
1974                 case IB_PMA_PORT_SAMPLES_RESULT:
1975                         ret = pma_get_portsamplesresult(pmp, ibdev, port);
1976                         goto bail;
1977                 case IB_PMA_PORT_SAMPLES_RESULT_EXT:
1978                         ret = pma_get_portsamplesresult_ext(pmp, ibdev, port);
1979                         goto bail;
1980                 case IB_PMA_PORT_COUNTERS:
1981                         ret = pma_get_portcounters(pmp, ibdev, port);
1982                         goto bail;
1983                 case IB_PMA_PORT_COUNTERS_EXT:
1984                         ret = pma_get_portcounters_ext(pmp, ibdev, port);
1985                         goto bail;
1986                 case IB_PMA_PORT_COUNTERS_CONG:
1987                         ret = pma_get_portcounters_cong(pmp, ibdev, port);
1988                         goto bail;
1989                 default:
1990                         pmp->status |= IB_SMP_UNSUP_METH_ATTR;
1991                         ret = reply((struct ib_smp *) pmp);
1992                         goto bail;
1993                 }
1994
1995         case IB_MGMT_METHOD_SET:
1996                 switch (pmp->attr_id) {
1997                 case IB_PMA_PORT_SAMPLES_CONTROL:
1998                         ret = pma_set_portsamplescontrol(pmp, ibdev, port);
1999                         goto bail;
2000                 case IB_PMA_PORT_COUNTERS:
2001                         ret = pma_set_portcounters(pmp, ibdev, port);
2002                         goto bail;
2003                 case IB_PMA_PORT_COUNTERS_EXT:
2004                         ret = pma_set_portcounters_ext(pmp, ibdev, port);
2005                         goto bail;
2006                 case IB_PMA_PORT_COUNTERS_CONG:
2007                         ret = pma_set_portcounters_cong(pmp, ibdev, port);
2008                         goto bail;
2009                 default:
2010                         pmp->status |= IB_SMP_UNSUP_METH_ATTR;
2011                         ret = reply((struct ib_smp *) pmp);
2012                         goto bail;
2013                 }
2014
2015         case IB_MGMT_METHOD_TRAP:
2016         case IB_MGMT_METHOD_GET_RESP:
2017                 /*
2018                  * The ib_mad module will call us to process responses
2019                  * before checking for other consumers.
2020                  * Just tell the caller to process it normally.
2021                  */
2022                 ret = IB_MAD_RESULT_SUCCESS;
2023                 goto bail;
2024
2025         default:
2026                 pmp->status |= IB_SMP_UNSUP_METHOD;
2027                 ret = reply((struct ib_smp *) pmp);
2028         }
2029
2030 bail:
2031         return ret;
2032 }
2033
2034 /**
2035  * qib_process_mad - process an incoming MAD packet
2036  * @ibdev: the infiniband device this packet came in on
2037  * @mad_flags: MAD flags
2038  * @port: the port number this packet came in on
2039  * @in_wc: the work completion entry for this packet
2040  * @in_grh: the global route header for this packet
2041  * @in_mad: the incoming MAD
2042  * @out_mad: any outgoing MAD reply
2043  *
2044  * Returns IB_MAD_RESULT_SUCCESS if this is a MAD that we are not
2045  * interested in processing.
2046  *
2047  * Note that the verbs framework has already done the MAD sanity checks,
2048  * and hop count/pointer updating for IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
2049  * MADs.
2050  *
2051  * This is called by the ib_mad module.
2052  */
2053 int qib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port,
2054                     struct ib_wc *in_wc, struct ib_grh *in_grh,
2055                     struct ib_mad *in_mad, struct ib_mad *out_mad)
2056 {
2057         int ret;
2058
2059         switch (in_mad->mad_hdr.mgmt_class) {
2060         case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
2061         case IB_MGMT_CLASS_SUBN_LID_ROUTED:
2062                 ret = process_subn(ibdev, mad_flags, port, in_mad, out_mad);
2063                 goto bail;
2064
2065         case IB_MGMT_CLASS_PERF_MGMT:
2066                 ret = process_perf(ibdev, port, in_mad, out_mad);
2067                 goto bail;
2068
2069         default:
2070                 ret = IB_MAD_RESULT_SUCCESS;
2071         }
2072
2073 bail:
2074         return ret;
2075 }
2076
2077 static void send_handler(struct ib_mad_agent *agent,
2078                          struct ib_mad_send_wc *mad_send_wc)
2079 {
2080         ib_free_send_mad(mad_send_wc->send_buf);
2081 }
2082
2083 static void xmit_wait_timer_func(unsigned long opaque)
2084 {
2085         struct qib_pportdata *ppd = (struct qib_pportdata *)opaque;
2086         struct qib_devdata *dd = dd_from_ppd(ppd);
2087         unsigned long flags;
2088         u8 status;
2089
2090         spin_lock_irqsave(&ppd->ibport_data.lock, flags);
2091         if (ppd->cong_stats.flags == IB_PMA_CONG_HW_CONTROL_SAMPLE) {
2092                 status = dd->f_portcntr(ppd, QIBPORTCNTR_PSSTAT);
2093                 if (status == IB_PMA_SAMPLE_STATUS_DONE) {
2094                         /* save counter cache */
2095                         cache_hw_sample_counters(ppd);
2096                         ppd->cong_stats.flags = IB_PMA_CONG_HW_CONTROL_TIMER;
2097                 } else
2098                         goto done;
2099         }
2100         ppd->cong_stats.counter = xmit_wait_get_value_delta(ppd);
2101         dd->f_set_cntr_sample(ppd, QIB_CONG_TIMER_PSINTERVAL, 0x0);
2102 done:
2103         spin_unlock_irqrestore(&ppd->ibport_data.lock, flags);
2104         mod_timer(&ppd->cong_stats.timer, jiffies + HZ);
2105 }
2106
2107 int qib_create_agents(struct qib_ibdev *dev)
2108 {
2109         struct qib_devdata *dd = dd_from_dev(dev);
2110         struct ib_mad_agent *agent;
2111         struct qib_ibport *ibp;
2112         int p;
2113         int ret;
2114
2115         for (p = 0; p < dd->num_pports; p++) {
2116                 ibp = &dd->pport[p].ibport_data;
2117                 agent = ib_register_mad_agent(&dev->ibdev, p + 1, IB_QPT_SMI,
2118                                               NULL, 0, send_handler,
2119                                               NULL, NULL);
2120                 if (IS_ERR(agent)) {
2121                         ret = PTR_ERR(agent);
2122                         goto err;
2123                 }
2124
2125                 /* Initialize xmit_wait structure */
2126                 dd->pport[p].cong_stats.counter = 0;
2127                 init_timer(&dd->pport[p].cong_stats.timer);
2128                 dd->pport[p].cong_stats.timer.function = xmit_wait_timer_func;
2129                 dd->pport[p].cong_stats.timer.data =
2130                         (unsigned long)(&dd->pport[p]);
2131                 dd->pport[p].cong_stats.timer.expires = 0;
2132                 add_timer(&dd->pport[p].cong_stats.timer);
2133
2134                 ibp->send_agent = agent;
2135         }
2136
2137         return 0;
2138
2139 err:
2140         for (p = 0; p < dd->num_pports; p++) {
2141                 ibp = &dd->pport[p].ibport_data;
2142                 if (ibp->send_agent) {
2143                         agent = ibp->send_agent;
2144                         ibp->send_agent = NULL;
2145                         ib_unregister_mad_agent(agent);
2146                 }
2147         }
2148
2149         return ret;
2150 }
2151
2152 void qib_free_agents(struct qib_ibdev *dev)
2153 {
2154         struct qib_devdata *dd = dd_from_dev(dev);
2155         struct ib_mad_agent *agent;
2156         struct qib_ibport *ibp;
2157         int p;
2158
2159         for (p = 0; p < dd->num_pports; p++) {
2160                 ibp = &dd->pport[p].ibport_data;
2161                 if (ibp->send_agent) {
2162                         agent = ibp->send_agent;
2163                         ibp->send_agent = NULL;
2164                         ib_unregister_mad_agent(agent);
2165                 }
2166                 if (ibp->sm_ah) {
2167                         ib_destroy_ah(&ibp->sm_ah->ibah);
2168                         ibp->sm_ah = NULL;
2169                 }
2170                 if (dd->pport[p].cong_stats.timer.data)
2171                         del_timer_sync(&dd->pport[p].cong_stats.timer);
2172         }
2173 }