drivers/infiniband/hw/ipath/ipath_mad.c

   1 /*
   2  * Copyright (c) 2006 QLogic, Inc. All rights reserved.
   3  * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the
   9  * OpenIB.org BSD license below:
  10  *
  11  *     Redistribution and use in source and binary forms, with or
  12  *     without modification, are permitted provided that the following
  13  *     conditions are met:
  14  *
  15  *      - Redistributions of source code must retain the above
  16  *        copyright notice, this list of conditions and the following
  17  *        disclaimer.
  18  *
  19  *      - Redistributions in binary form must reproduce the above
  20  *        copyright notice, this list of conditions and the following
  21  *        disclaimer in the documentation and/or other materials
  22  *        provided with the distribution.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31  * SOFTWARE.
  32  */
  33
  34 #include <rdma/ib_smi.h>
  35
  36 #include "ipath_kernel.h"
  37 #include "ipath_verbs.h"
  38 #include "ipath_common.h"
  39
  40 #define IB_SMP_UNSUP_VERSION    __constant_htons(0x0004)
  41 #define IB_SMP_UNSUP_METHOD     __constant_htons(0x0008)
  42 #define IB_SMP_UNSUP_METH_ATTR  __constant_htons(0x000C)
  43 #define IB_SMP_INVALID_FIELD    __constant_htons(0x001C)
  44
  45 static int reply(struct ib_smp *smp)
  46 {
  47         /*
  48          * The verbs framework will handle the directed/LID route
  49          * packet changes.
  50          */
  51         smp->method = IB_MGMT_METHOD_GET_RESP;
  52         if (smp->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
  53                 smp->status |= IB_SMP_DIRECTION;
  54         return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
  55 }
  56
  57 static int recv_subn_get_nodedescription(struct ib_smp *smp,
  58                                          struct ib_device *ibdev)
  59 {
  60         if (smp->attr_mod)
  61                 smp->status |= IB_SMP_INVALID_FIELD;
  62
  63         strncpy(smp->data, ibdev->node_desc, sizeof(smp->data));
  64
  65         return reply(smp);
  66 }
  67
  68 struct nodeinfo {
  69         u8 base_version;
  70         u8 class_version;
  71         u8 node_type;
  72         u8 num_ports;
  73         __be64 sys_guid;
  74         __be64 node_guid;
  75         __be64 port_guid;
  76         __be16 partition_cap;
  77         __be16 device_id;
  78         __be32 revision;
  79         u8 local_port_num;
  80         u8 vendor_id[3];
  81 } __attribute__ ((packed));
  82
  83 static int recv_subn_get_nodeinfo(struct ib_smp *smp,
  84                                   struct ib_device *ibdev, u8 port)
  85 {
  86         struct nodeinfo *nip = (struct nodeinfo *)&smp->data;
  87         struct ipath_devdata *dd = to_idev(ibdev)->dd;
  88         u32 vendor, majrev, minrev;
  89
  90         if (smp->attr_mod)
  91                 smp->status |= IB_SMP_INVALID_FIELD;
  92
  93         nip->base_version = 1;
  94         nip->class_version = 1;
  95         nip->node_type = 1;     /* channel adapter */
  96         /*
  97          * XXX The num_ports value will need a layer function to get
  98          * the value if we ever have more than one IB port on a chip.
  99          * We will also need to get the GUID for the port.
 100          */
 101         nip->num_ports = ibdev->phys_port_cnt;
 102         /* This is already in network order */
 103         nip->sys_guid = to_idev(ibdev)->sys_image_guid;
 104         nip->node_guid = dd->ipath_guid;
 105         nip->port_guid = nip->sys_guid;
 106         nip->partition_cap = cpu_to_be16(ipath_get_npkeys(dd));
 107         nip->device_id = cpu_to_be16(dd->ipath_deviceid);
 108         majrev = dd->ipath_majrev;
 109         minrev = dd->ipath_minrev;
 110         nip->revision = cpu_to_be32((majrev << 16) | minrev);
 111         nip->local_port_num = port;
 112         vendor = dd->ipath_vendorid;
 113         nip->vendor_id[0] = 0;
 114         nip->vendor_id[1] = vendor >> 8;
 115         nip->vendor_id[2] = vendor;
 116
 117         return reply(smp);
 118 }
 119
 120 static int recv_subn_get_guidinfo(struct ib_smp *smp,
 121                                   struct ib_device *ibdev)
 122 {
 123         u32 startgx = 8 * be32_to_cpu(smp->attr_mod);
 124         __be64 *p = (__be64 *) smp->data;
 125
 126         /* 32 blocks of 8 64-bit GUIDs per block */
 127
 128         memset(smp->data, 0, sizeof(smp->data));
 129
 130         /*
 131          * We only support one GUID for now.  If this changes, the
 132          * portinfo.guid_cap field needs to be updated too.
 133          */
 134         if (startgx == 0)
 135                 /* The first is a copy of the read-only HW GUID. */
 136                 *p = to_idev(ibdev)->dd->ipath_guid;
 137         else
 138                 smp->status |= IB_SMP_INVALID_FIELD;
 139
 140         return reply(smp);
 141 }
 142
 143
 144 static int get_overrunthreshold(struct ipath_devdata *dd)
 145 {
 146         return (dd->ipath_ibcctrl >>
 147                 INFINIPATH_IBCC_OVERRUNTHRESHOLD_SHIFT) &
 148                 INFINIPATH_IBCC_OVERRUNTHRESHOLD_MASK;
 149 }
 150
 151 /**
 152  * set_overrunthreshold - set the overrun threshold
 153  * @dd: the infinipath device
 154  * @n: the new threshold
 155  *
 156  * Note that this will only take effect when the link state changes.
 157  */
 158 static int set_overrunthreshold(struct ipath_devdata *dd, unsigned n)
 159 {
 160         unsigned v;
 161
 162         v = (dd->ipath_ibcctrl >> INFINIPATH_IBCC_OVERRUNTHRESHOLD_SHIFT) &
 163                 INFINIPATH_IBCC_OVERRUNTHRESHOLD_MASK;
 164         if (v != n) {
 165                 dd->ipath_ibcctrl &=
 166                         ~(INFINIPATH_IBCC_OVERRUNTHRESHOLD_MASK <<
 167                           INFINIPATH_IBCC_OVERRUNTHRESHOLD_SHIFT);
 168                 dd->ipath_ibcctrl |=
 169                         (u64) n << INFINIPATH_IBCC_OVERRUNTHRESHOLD_SHIFT;
 170                 ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl,
 171                                  dd->ipath_ibcctrl);
 172         }
 173         return 0;
 174 }
 175
 176 static int get_phyerrthreshold(struct ipath_devdata *dd)
 177 {
 178         return (dd->ipath_ibcctrl >>
 179                 INFINIPATH_IBCC_PHYERRTHRESHOLD_SHIFT) &
 180                 INFINIPATH_IBCC_PHYERRTHRESHOLD_MASK;
 181 }
 182
 183 /**
 184  * set_phyerrthreshold - set the physical error threshold
 185  * @dd: the infinipath device
 186  * @n: the new threshold
 187  *
 188  * Note that this will only take effect when the link state changes.
 189  */
 190 static int set_phyerrthreshold(struct ipath_devdata *dd, unsigned n)
 191 {
 192         unsigned v;
 193
 194         v = (dd->ipath_ibcctrl >> INFINIPATH_IBCC_PHYERRTHRESHOLD_SHIFT) &
 195                 INFINIPATH_IBCC_PHYERRTHRESHOLD_MASK;
 196         if (v != n) {
 197                 dd->ipath_ibcctrl &=
 198                         ~(INFINIPATH_IBCC_PHYERRTHRESHOLD_MASK <<
 199                           INFINIPATH_IBCC_PHYERRTHRESHOLD_SHIFT);
 200                 dd->ipath_ibcctrl |=
 201                         (u64) n << INFINIPATH_IBCC_PHYERRTHRESHOLD_SHIFT;
 202                 ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl,
 203                                  dd->ipath_ibcctrl);
 204         }
 205         return 0;
 206 }
 207
 208 /**
 209  * get_linkdowndefaultstate - get the default linkdown state
 210  * @dd: the infinipath device
 211  *
 212  * Returns zero if the default is POLL, 1 if the default is SLEEP.
 213  */
 214 static int get_linkdowndefaultstate(struct ipath_devdata *dd)
 215 {
 216         return !!(dd->ipath_ibcctrl & INFINIPATH_IBCC_LINKDOWNDEFAULTSTATE);
 217 }
 218
 219 static int recv_subn_get_portinfo(struct ib_smp *smp,
 220                                   struct ib_device *ibdev, u8 port)
 221 {
 222         struct ipath_ibdev *dev;
 223         struct ib_port_info *pip = (struct ib_port_info *)smp->data;
 224         u16 lid;
 225         u8 ibcstat;
 226         u8 mtu;
 227         int ret;
 228
 229         if (be32_to_cpu(smp->attr_mod) > ibdev->phys_port_cnt) {
 230                 smp->status |= IB_SMP_INVALID_FIELD;
 231                 ret = reply(smp);
 232                 goto bail;
 233         }
 234
 235         dev = to_idev(ibdev);
 236
 237         /* Clear all fields.  Only set the non-zero fields. */
 238         memset(smp->data, 0, sizeof(smp->data));
 239
 240         /* Only return the mkey if the protection field allows it. */
 241         if (smp->method == IB_MGMT_METHOD_SET || dev->mkey == smp->mkey ||
 242             (dev->mkeyprot_resv_lmc >> 6) == 0)
 243                 pip->mkey = dev->mkey;
 244         pip->gid_prefix = dev->gid_prefix;
 245         lid = dev->dd->ipath_lid;
 246         pip->lid = lid ? cpu_to_be16(lid) : IB_LID_PERMISSIVE;
 247         pip->sm_lid = cpu_to_be16(dev->sm_lid);
 248         pip->cap_mask = cpu_to_be32(dev->port_cap_flags);
 249         /* pip->diag_code; */
 250         pip->mkey_lease_period = cpu_to_be16(dev->mkey_lease_period);
 251         pip->local_port_num = port;
 252         pip->link_width_enabled = dev->link_width_enabled;
 253         pip->link_width_supported = 3;  /* 1x or 4x */
 254         pip->link_width_active = 2;     /* 4x */
 255         pip->linkspeed_portstate = 0x10;        /* 2.5Gbps */
 256         ibcstat = dev->dd->ipath_lastibcstat;
 257         pip->linkspeed_portstate |= ((ibcstat >> 4) & 0x3) + 1;
 258         pip->portphysstate_linkdown =
 259                 (ipath_cvt_physportstate[ibcstat & 0xf] << 4) |
 260                 (get_linkdowndefaultstate(dev->dd) ? 1 : 2);
 261         pip->mkeyprot_resv_lmc = dev->mkeyprot_resv_lmc;
 262         pip->linkspeedactive_enabled = 0x11;    /* 2.5Gbps, 2.5Gbps */
 263         switch (dev->dd->ipath_ibmtu) {
 264         case 4096:
 265                 mtu = IB_MTU_4096;
 266                 break;
 267         case 2048:
 268                 mtu = IB_MTU_2048;
 269                 break;
 270         case 1024:
 271                 mtu = IB_MTU_1024;
 272                 break;
 273         case 512:
 274                 mtu = IB_MTU_512;
 275                 break;
 276         case 256:
 277                 mtu = IB_MTU_256;
 278                 break;
 279         default:                /* oops, something is wrong */
 280                 mtu = IB_MTU_2048;
 281                 break;
 282         }
 283         pip->neighbormtu_mastersmsl = (mtu << 4) | dev->sm_sl;
 284         pip->vlcap_inittype = 0x10;     /* VLCap = VL0, InitType = 0 */
 285         pip->vl_high_limit = dev->vl_high_limit;
 286         /* pip->vl_arb_high_cap; // only one VL */
 287         /* pip->vl_arb_low_cap; // only one VL */
 288         /* InitTypeReply = 0 */
 289         pip->inittypereply_mtucap = IB_MTU_4096;
 290         // HCAs ignore VLStallCount and HOQLife
 291         /* pip->vlstallcnt_hoqlife; */
 292         pip->operationalvl_pei_peo_fpi_fpo = 0x10;      /* OVLs = 1 */
 293         pip->mkey_violations = cpu_to_be16(dev->mkey_violations);
 294         /* P_KeyViolations are counted by hardware. */
 295         pip->pkey_violations =
 296                 cpu_to_be16((ipath_get_cr_errpkey(dev->dd) -
 297                              dev->z_pkey_violations) & 0xFFFF);
 298         pip->qkey_violations = cpu_to_be16(dev->qkey_violations);
 299         /* Only the hardware GUID is supported for now */
 300         pip->guid_cap = 1;
 301         pip->clientrereg_resv_subnetto = dev->subnet_timeout;
 302         /* 32.768 usec. response time (guessing) */
 303         pip->resv_resptimevalue = 3;
 304         pip->localphyerrors_overrunerrors =
 305                 (get_phyerrthreshold(dev->dd) << 4) |
 306                 get_overrunthreshold(dev->dd);
 307         /* pip->max_credit_hint; */
 308         /* pip->link_roundtrip_latency[3]; */
 309
 310         ret = reply(smp);
 311
 312 bail:
 313         return ret;
 314 }
 315
 316 /**
 317  * get_pkeys - return the PKEY table for port 0
 318  * @dd: the infinipath device
 319  * @pkeys: the pkey table is placed here
 320  */
 321 static int get_pkeys(struct ipath_devdata *dd, u16 * pkeys)
 322 {
 323         struct ipath_portdata *pd = dd->ipath_pd[0];
 324
 325         memcpy(pkeys, pd->port_pkeys, sizeof(pd->port_pkeys));
 326
 327         return 0;
 328 }
 329
 330 static int recv_subn_get_pkeytable(struct ib_smp *smp,
 331                                    struct ib_device *ibdev)
 332 {
 333         u32 startpx = 32 * (be32_to_cpu(smp->attr_mod) & 0xffff);
 334         u16 *p = (u16 *) smp->data;
 335         __be16 *q = (__be16 *) smp->data;
 336
 337         /* 64 blocks of 32 16-bit P_Key entries */
 338
 339         memset(smp->data, 0, sizeof(smp->data));
 340         if (startpx == 0) {
 341                 struct ipath_ibdev *dev = to_idev(ibdev);
 342                 unsigned i, n = ipath_get_npkeys(dev->dd);
 343
 344                 get_pkeys(dev->dd, p);
 345
 346                 for (i = 0; i < n; i++)
 347                         q[i] = cpu_to_be16(p[i]);
 348         } else
 349                 smp->status |= IB_SMP_INVALID_FIELD;
 350
 351         return reply(smp);
 352 }
 353
 354 static int recv_subn_set_guidinfo(struct ib_smp *smp,
 355                                   struct ib_device *ibdev)
 356 {
 357         /* The only GUID we support is the first read-only entry. */
 358         return recv_subn_get_guidinfo(smp, ibdev);
 359 }
 360
 361 /**
 362  * set_linkdowndefaultstate - set the default linkdown state
 363  * @dd: the infinipath device
 364  * @sleep: the new state
 365  *
 366  * Note that this will only take effect when the link state changes.
 367  */
 368 static int set_linkdowndefaultstate(struct ipath_devdata *dd, int sleep)
 369 {
 370         if (sleep)
 371                 dd->ipath_ibcctrl |= INFINIPATH_IBCC_LINKDOWNDEFAULTSTATE;
 372         else
 373                 dd->ipath_ibcctrl &= ~INFINIPATH_IBCC_LINKDOWNDEFAULTSTATE;
 374         ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl,
 375                          dd->ipath_ibcctrl);
 376         return 0;
 377 }
 378
 379 /**
 380  * recv_subn_set_portinfo - set port information
 381  * @smp: the incoming SM packet
 382  * @ibdev: the infiniband device
 383  * @port: the port on the device
 384  *
 385  * Set Portinfo (see ch. 14.2.5.6).
 386  */
 387 static int recv_subn_set_portinfo(struct ib_smp *smp,
 388                                   struct ib_device *ibdev, u8 port)
 389 {
 390         struct ib_port_info *pip = (struct ib_port_info *)smp->data;
 391         struct ib_event event;
 392         struct ipath_ibdev *dev;
 393         u32 flags;
 394         char clientrereg = 0;
 395         u16 lid, smlid;
 396         u8 lwe;
 397         u8 lse;
 398         u8 state;
 399         u16 lstate;
 400         u32 mtu;
 401         int ret, ore;
 402
 403         if (be32_to_cpu(smp->attr_mod) > ibdev->phys_port_cnt)
 404                 goto err;
 405
 406         dev = to_idev(ibdev);
 407         event.device = ibdev;
 408         event.element.port_num = port;
 409
 410         dev->mkey = pip->mkey;
 411         dev->gid_prefix = pip->gid_prefix;
 412         dev->mkey_lease_period = be16_to_cpu(pip->mkey_lease_period);
 413
 414         lid = be16_to_cpu(pip->lid);
 415         if (lid != dev->dd->ipath_lid) {
 416                 /* Must be a valid unicast LID address. */
 417                 if (lid == 0 || lid >= IPATH_MULTICAST_LID_BASE)
 418                         goto err;
 419                 ipath_set_lid(dev->dd, lid, pip->mkeyprot_resv_lmc & 7);
 420                 event.event = IB_EVENT_LID_CHANGE;
 421                 ib_dispatch_event(&event);
 422         }
 423
 424         smlid = be16_to_cpu(pip->sm_lid);
 425         if (smlid != dev->sm_lid) {
 426                 /* Must be a valid unicast LID address. */
 427                 if (smlid == 0 || smlid >= IPATH_MULTICAST_LID_BASE)
 428                         goto err;
 429                 dev->sm_lid = smlid;
 430                 event.event = IB_EVENT_SM_CHANGE;
 431                 ib_dispatch_event(&event);
 432         }
 433
 434         /* Only 4x supported but allow 1x or 4x to be set (see 14.2.6.6). */
 435         lwe = pip->link_width_enabled;
 436         if ((lwe >= 4 && lwe <= 8) || (lwe >= 0xC && lwe <= 0xFE))
 437                 goto err;
 438         if (lwe == 0xFF)
 439                 dev->link_width_enabled = 3;    /* 1x or 4x */
 440         else if (lwe)
 441                 dev->link_width_enabled = lwe;
 442
 443         /* Only 2.5 Gbs supported. */
 444         lse = pip->linkspeedactive_enabled & 0xF;
 445         if (lse >= 2 && lse <= 0xE)
 446                 goto err;
 447
 448         /* Set link down default state. */
 449         switch (pip->portphysstate_linkdown & 0xF) {
 450         case 0: /* NOP */
 451                 break;
 452         case 1: /* SLEEP */
 453                 if (set_linkdowndefaultstate(dev->dd, 1))
 454                         goto err;
 455                 break;
 456         case 2: /* POLL */
 457                 if (set_linkdowndefaultstate(dev->dd, 0))
 458                         goto err;
 459                 break;
 460         default:
 461                 goto err;
 462         }
 463
 464         dev->mkeyprot_resv_lmc = pip->mkeyprot_resv_lmc;
 465         dev->vl_high_limit = pip->vl_high_limit;
 466
 467         switch ((pip->neighbormtu_mastersmsl >> 4) & 0xF) {
 468         case IB_MTU_256:
 469                 mtu = 256;
 470                 break;
 471         case IB_MTU_512:
 472                 mtu = 512;
 473                 break;
 474         case IB_MTU_1024:
 475                 mtu = 1024;
 476                 break;
 477         case IB_MTU_2048:
 478                 mtu = 2048;
 479                 break;
 480         case IB_MTU_4096:
 481                 mtu = 4096;
 482                 break;
 483         default:
 484                 /* XXX We have already partially updated our state! */
 485                 goto err;
 486         }
 487         ipath_set_mtu(dev->dd, mtu);
 488
 489         dev->sm_sl = pip->neighbormtu_mastersmsl & 0xF;
 490
 491         /* We only support VL0 */
 492         if (((pip->operationalvl_pei_peo_fpi_fpo >> 4) & 0xF) > 1)
 493                 goto err;
 494
 495         if (pip->mkey_violations == 0)
 496                 dev->mkey_violations = 0;
 497
 498         /*
 499          * Hardware counter can't be reset so snapshot and subtract
 500          * later.
 501          */
 502         if (pip->pkey_violations == 0)
 503                 dev->z_pkey_violations = ipath_get_cr_errpkey(dev->dd);
 504
 505         if (pip->qkey_violations == 0)
 506                 dev->qkey_violations = 0;
 507
 508         ore = pip->localphyerrors_overrunerrors;
 509         if (set_phyerrthreshold(dev->dd, (ore >> 4) & 0xF))
 510                 goto err;
 511
 512         if (set_overrunthreshold(dev->dd, (ore & 0xF)))
 513                 goto err;
 514
 515         dev->subnet_timeout = pip->clientrereg_resv_subnetto & 0x1F;
 516
 517         if (pip->clientrereg_resv_subnetto & 0x80) {
 518                 clientrereg = 1;
 519                 event.event = IB_EVENT_CLIENT_REREGISTER;
 520                 ib_dispatch_event(&event);
 521         }
 522
 523         /*
 524          * Do the port state change now that the other link parameters
 525          * have been set.
 526          * Changing the port physical state only makes sense if the link
 527          * is down or is being set to down.
 528          */
 529         state = pip->linkspeed_portstate & 0xF;
 530         flags = dev->dd->ipath_flags;
 531         lstate = (pip->portphysstate_linkdown >> 4) & 0xF;
 532         if (lstate && !(state == IB_PORT_DOWN || state == IB_PORT_NOP))
 533                 goto err;
 534
 535         /*
 536          * Only state changes of DOWN, ARM, and ACTIVE are valid
 537          * and must be in the correct state to take effect (see 7.2.6).
 538          */
 539         switch (state) {
 540         case IB_PORT_NOP:
 541                 if (lstate == 0)
 542                         break;
 543                 /* FALLTHROUGH */
 544         case IB_PORT_DOWN:
 545                 if (lstate == 0)
 546                         if (get_linkdowndefaultstate(dev->dd))
 547                                 lstate = IPATH_IB_LINKDOWN_SLEEP;
 548                         else
 549                                 lstate = IPATH_IB_LINKDOWN;
 550                 else if (lstate == 1)
 551                         lstate = IPATH_IB_LINKDOWN_SLEEP;
 552                 else if (lstate == 2)
 553                         lstate = IPATH_IB_LINKDOWN;
 554                 else if (lstate == 3)
 555                         lstate = IPATH_IB_LINKDOWN_DISABLE;
 556                 else
 557                         goto err;
 558                 ipath_set_linkstate(dev->dd, lstate);
 559                 if (flags & IPATH_LINKACTIVE) {
 560                         event.event = IB_EVENT_PORT_ERR;
 561                         ib_dispatch_event(&event);
 562                 }
 563                 break;
 564         case IB_PORT_ARMED:
 565                 if (!(flags & (IPATH_LINKINIT | IPATH_LINKACTIVE)))
 566                         break;
 567                 ipath_set_linkstate(dev->dd, IPATH_IB_LINKARM);
 568                 if (flags & IPATH_LINKACTIVE) {
 569                         event.event = IB_EVENT_PORT_ERR;
 570                         ib_dispatch_event(&event);
 571                 }
 572                 break;
 573         case IB_PORT_ACTIVE:
 574                 if (!(flags & IPATH_LINKARMED))
 575                         break;
 576                 ipath_set_linkstate(dev->dd, IPATH_IB_LINKACTIVE);
 577                 event.event = IB_EVENT_PORT_ACTIVE;
 578                 ib_dispatch_event(&event);
 579                 break;
 580         default:
 581                 /* XXX We have already partially updated our state! */
 582                 goto err;
 583         }
 584
 585         ret = recv_subn_get_portinfo(smp, ibdev, port);
 586
 587         if (clientrereg)
 588                 pip->clientrereg_resv_subnetto |= 0x80;
 589
 590         goto done;
 591
 592 err:
 593         smp->status |= IB_SMP_INVALID_FIELD;
 594         ret = recv_subn_get_portinfo(smp, ibdev, port);
 595
 596 done:
 597         return ret;
 598 }
 599
 600 /**
 601  * rm_pkey - decrecment the reference count for the given PKEY
 602  * @dd: the infinipath device
 603  * @key: the PKEY index
 604  *
 605  * Return true if this was the last reference and the hardware table entry
 606  * needs to be changed.
 607  */
 608 static int rm_pkey(struct ipath_devdata *dd, u16 key)
 609 {
 610         int i;
 611         int ret;
 612
 613         for (i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) {
 614                 if (dd->ipath_pkeys[i] != key)
 615                         continue;
 616                 if (atomic_dec_and_test(&dd->ipath_pkeyrefs[i])) {
 617                         dd->ipath_pkeys[i] = 0;
 618                         ret = 1;
 619                         goto bail;
 620                 }
 621                 break;
 622         }
 623
 624         ret = 0;
 625
 626 bail:
 627         return ret;
 628 }
 629
 630 /**
 631  * add_pkey - add the given PKEY to the hardware table
 632  * @dd: the infinipath device
 633  * @key: the PKEY
 634  *
 635  * Return an error code if unable to add the entry, zero if no change,
 636  * or 1 if the hardware PKEY register needs to be updated.
 637  */
 638 static int add_pkey(struct ipath_devdata *dd, u16 key)
 639 {
 640         int i;
 641         u16 lkey = key & 0x7FFF;
 642         int any = 0;
 643         int ret;
 644
 645         if (lkey == 0x7FFF) {
 646                 ret = 0;
 647                 goto bail;
 648         }
 649
 650         /* Look for an empty slot or a matching PKEY. */
 651         for (i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) {
 652                 if (!dd->ipath_pkeys[i]) {
 653                         any++;
 654                         continue;
 655                 }
 656                 /* If it matches exactly, try to increment the ref count */
 657                 if (dd->ipath_pkeys[i] == key) {
 658                         if (atomic_inc_return(&dd->ipath_pkeyrefs[i]) > 1) {
 659                                 ret = 0;
 660                                 goto bail;
 661                         }
 662                         /* Lost the race. Look for an empty slot below. */
 663                         atomic_dec(&dd->ipath_pkeyrefs[i]);
 664                         any++;
 665                 }
 666                 /*
 667                  * It makes no sense to have both the limited and unlimited
 668                  * PKEY set at the same time since the unlimited one will
 669                  * disable the limited one.
 670                  */
 671                 if ((dd->ipath_pkeys[i] & 0x7FFF) == lkey) {
 672                         ret = -EEXIST;
 673                         goto bail;
 674                 }
 675         }
 676         if (!any) {
 677                 ret = -EBUSY;
 678                 goto bail;
 679         }
 680         for (i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) {
 681                 if (!dd->ipath_pkeys[i] &&
 682                     atomic_inc_return(&dd->ipath_pkeyrefs[i]) == 1) {
 683                         /* for ipathstats, etc. */
 684                         ipath_stats.sps_pkeys[i] = lkey;
 685                         dd->ipath_pkeys[i] = key;
 686                         ret = 1;
 687                         goto bail;
 688                 }
 689         }
 690         ret = -EBUSY;
 691
 692 bail:
 693         return ret;
 694 }
 695
 696 /**
 697  * set_pkeys - set the PKEY table for port 0
 698  * @dd: the infinipath device
 699  * @pkeys: the PKEY table
 700  */
 701 static int set_pkeys(struct ipath_devdata *dd, u16 *pkeys)
 702 {
 703         struct ipath_portdata *pd;
 704         int i;
 705         int changed = 0;
 706
 707         pd = dd->ipath_pd[0];
 708
 709         for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) {
 710                 u16 key = pkeys[i];
 711                 u16 okey = pd->port_pkeys[i];
 712
 713                 if (key == okey)
 714                         continue;
 715                 /*
 716                  * The value of this PKEY table entry is changing.
 717                  * Remove the old entry in the hardware's array of PKEYs.
 718                  */
 719                 if (okey & 0x7FFF)
 720                         changed |= rm_pkey(dd, okey);
 721                 if (key & 0x7FFF) {
 722                         int ret = add_pkey(dd, key);
 723
 724                         if (ret < 0)
 725                                 key = 0;
 726                         else
 727                                 changed |= ret;
 728                 }
 729                 pd->port_pkeys[i] = key;
 730         }
 731         if (changed) {
 732                 u64 pkey;
 733
 734                 pkey = (u64) dd->ipath_pkeys[0] |
 735                         ((u64) dd->ipath_pkeys[1] << 16) |
 736                         ((u64) dd->ipath_pkeys[2] << 32) |
 737                         ((u64) dd->ipath_pkeys[3] << 48);
 738                 ipath_cdbg(VERBOSE, "p0 new pkey reg %llx\n",
 739                            (unsigned long long) pkey);
 740                 ipath_write_kreg(dd, dd->ipath_kregs->kr_partitionkey,
 741                                  pkey);
 742         }
 743         return 0;
 744 }
 745
 746 static int recv_subn_set_pkeytable(struct ib_smp *smp,
 747                                    struct ib_device *ibdev)
 748 {
 749         u32 startpx = 32 * (be32_to_cpu(smp->attr_mod) & 0xffff);
 750         __be16 *p = (__be16 *) smp->data;
 751         u16 *q = (u16 *) smp->data;
 752         struct ipath_ibdev *dev = to_idev(ibdev);
 753         unsigned i, n = ipath_get_npkeys(dev->dd);
 754
 755         for (i = 0; i < n; i++)
 756                 q[i] = be16_to_cpu(p[i]);
 757
 758         if (startpx != 0 || set_pkeys(dev->dd, q) != 0)
 759                 smp->status |= IB_SMP_INVALID_FIELD;
 760
 761         return recv_subn_get_pkeytable(smp, ibdev);
 762 }
 763
 764 #define IB_PMA_CLASS_PORT_INFO          __constant_htons(0x0001)
 765 #define IB_PMA_PORT_SAMPLES_CONTROL     __constant_htons(0x0010)
 766 #define IB_PMA_PORT_SAMPLES_RESULT      __constant_htons(0x0011)
 767 #define IB_PMA_PORT_COUNTERS            __constant_htons(0x0012)
 768 #define IB_PMA_PORT_COUNTERS_EXT        __constant_htons(0x001D)
 769 #define IB_PMA_PORT_SAMPLES_RESULT_EXT  __constant_htons(0x001E)
 770
 771 struct ib_perf {
 772         u8 base_version;
 773         u8 mgmt_class;
 774         u8 class_version;
 775         u8 method;
 776         __be16 status;
 777         __be16 unused;
 778         __be64 tid;
 779         __be16 attr_id;
 780         __be16 resv;
 781         __be32 attr_mod;
 782         u8 reserved[40];
 783         u8 data[192];
 784 } __attribute__ ((packed));
 785
 786 struct ib_pma_classportinfo {
 787         u8 base_version;
 788         u8 class_version;
 789         __be16 cap_mask;
 790         u8 reserved[3];
 791         u8 resp_time_value;     /* only lower 5 bits */
 792         union ib_gid redirect_gid;
 793         __be32 redirect_tc_sl_fl;       /* 8, 4, 20 bits respectively */
 794         __be16 redirect_lid;
 795         __be16 redirect_pkey;
 796         __be32 redirect_qp;     /* only lower 24 bits */
 797         __be32 redirect_qkey;
 798         union ib_gid trap_gid;
 799         __be32 trap_tc_sl_fl;   /* 8, 4, 20 bits respectively */
 800         __be16 trap_lid;
 801         __be16 trap_pkey;
 802         __be32 trap_hl_qp;      /* 8, 24 bits respectively */
 803         __be32 trap_qkey;
 804 } __attribute__ ((packed));
 805
 806 struct ib_pma_portsamplescontrol {
 807         u8 opcode;
 808         u8 port_select;
 809         u8 tick;
 810         u8 counter_width;       /* only lower 3 bits */
 811         __be32 counter_mask0_9; /* 2, 10 * 3, bits */
 812         __be16 counter_mask10_14;       /* 1, 5 * 3, bits */
 813         u8 sample_mechanisms;
 814         u8 sample_status;       /* only lower 2 bits */
 815         __be64 option_mask;
 816         __be64 vendor_mask;
 817         __be32 sample_start;
 818         __be32 sample_interval;
 819         __be16 tag;
 820         __be16 counter_select[15];
 821 } __attribute__ ((packed));
 822
 823 struct ib_pma_portsamplesresult {
 824         __be16 tag;
 825         __be16 sample_status;   /* only lower 2 bits */
 826         __be32 counter[15];
 827 } __attribute__ ((packed));
 828
 829 struct ib_pma_portsamplesresult_ext {
 830         __be16 tag;
 831         __be16 sample_status;   /* only lower 2 bits */
 832         __be32 extended_width;  /* only upper 2 bits */
 833         __be64 counter[15];
 834 } __attribute__ ((packed));
 835
 836 struct ib_pma_portcounters {
 837         u8 reserved;
 838         u8 port_select;
 839         __be16 counter_select;
 840         __be16 symbol_error_counter;
 841         u8 link_error_recovery_counter;
 842         u8 link_downed_counter;
 843         __be16 port_rcv_errors;
 844         __be16 port_rcv_remphys_errors;
 845         __be16 port_rcv_switch_relay_errors;
 846         __be16 port_xmit_discards;
 847         u8 port_xmit_constraint_errors;
 848         u8 port_rcv_constraint_errors;
 849         u8 reserved1;
 850         u8 lli_ebor_errors;     /* 4, 4, bits */
 851         __be16 reserved2;
 852         __be16 vl15_dropped;
 853         __be32 port_xmit_data;
 854         __be32 port_rcv_data;
 855         __be32 port_xmit_packets;
 856         __be32 port_rcv_packets;
 857 } __attribute__ ((packed));
 858
 859 #define IB_PMA_SEL_SYMBOL_ERROR                 __constant_htons(0x0001)
 860 #define IB_PMA_SEL_LINK_ERROR_RECOVERY          __constant_htons(0x0002)
 861 #define IB_PMA_SEL_LINK_DOWNED                  __constant_htons(0x0004)
 862 #define IB_PMA_SEL_PORT_RCV_ERRORS              __constant_htons(0x0008)
 863 #define IB_PMA_SEL_PORT_RCV_REMPHYS_ERRORS      __constant_htons(0x0010)
 864 #define IB_PMA_SEL_PORT_XMIT_DISCARDS           __constant_htons(0x0040)
 865 #define IB_PMA_SEL_LOCAL_LINK_INTEGRITY_ERRORS  __constant_htons(0x0200)
 866 #define IB_PMA_SEL_EXCESSIVE_BUFFER_OVERRUNS    __constant_htons(0x0400)
 867 #define IB_PMA_SEL_PORT_VL15_DROPPED            __constant_htons(0x0800)
 868 #define IB_PMA_SEL_PORT_XMIT_DATA               __constant_htons(0x1000)
 869 #define IB_PMA_SEL_PORT_RCV_DATA                __constant_htons(0x2000)
 870 #define IB_PMA_SEL_PORT_XMIT_PACKETS            __constant_htons(0x4000)
 871 #define IB_PMA_SEL_PORT_RCV_PACKETS             __constant_htons(0x8000)
 872
 873 struct ib_pma_portcounters_ext {
 874         u8 reserved;
 875         u8 port_select;
 876         __be16 counter_select;
 877         __be32 reserved1;
 878         __be64 port_xmit_data;
 879         __be64 port_rcv_data;
 880         __be64 port_xmit_packets;
 881         __be64 port_rcv_packets;
 882         __be64 port_unicast_xmit_packets;
 883         __be64 port_unicast_rcv_packets;
 884         __be64 port_multicast_xmit_packets;
 885         __be64 port_multicast_rcv_packets;
 886 } __attribute__ ((packed));
 887
 888 #define IB_PMA_SELX_PORT_XMIT_DATA              __constant_htons(0x0001)
 889 #define IB_PMA_SELX_PORT_RCV_DATA               __constant_htons(0x0002)
 890 #define IB_PMA_SELX_PORT_XMIT_PACKETS           __constant_htons(0x0004)
 891 #define IB_PMA_SELX_PORT_RCV_PACKETS            __constant_htons(0x0008)
 892 #define IB_PMA_SELX_PORT_UNI_XMIT_PACKETS       __constant_htons(0x0010)
 893 #define IB_PMA_SELX_PORT_UNI_RCV_PACKETS        __constant_htons(0x0020)
 894 #define IB_PMA_SELX_PORT_MULTI_XMIT_PACKETS     __constant_htons(0x0040)
 895 #define IB_PMA_SELX_PORT_MULTI_RCV_PACKETS      __constant_htons(0x0080)
 896
 897 static int recv_pma_get_classportinfo(struct ib_perf *pmp)
 898 {
 899         struct ib_pma_classportinfo *p =
 900                 (struct ib_pma_classportinfo *)pmp->data;
 901
 902         memset(pmp->data, 0, sizeof(pmp->data));
 903
 904         if (pmp->attr_mod != 0)
 905                 pmp->status |= IB_SMP_INVALID_FIELD;
 906
 907         /* Indicate AllPortSelect is valid (only one port anyway) */
 908         p->cap_mask = __constant_cpu_to_be16(1 << 8);
 909         p->base_version = 1;
 910         p->class_version = 1;
 911         /*
 912          * Expected response time is 4.096 usec. * 2^18 == 1.073741824
 913          * sec.
 914          */
 915         p->resp_time_value = 18;
 916
 917         return reply((struct ib_smp *) pmp);
 918 }
 919
 920 /*
 921  * The PortSamplesControl.CounterMasks field is an array of 3 bit fields
 922  * which specify the N'th counter's capabilities. See ch. 16.1.3.2.
 923  * We support 5 counters which only count the mandatory quantities.
 924  */
 925 #define COUNTER_MASK(q, n) (q << ((9 - n) * 3))
 926 #define COUNTER_MASK0_9 \
 927         __constant_cpu_to_be32(COUNTER_MASK(1, 0) | \
 928                                COUNTER_MASK(1, 1) | \
 929                                COUNTER_MASK(1, 2) | \
 930                                COUNTER_MASK(1, 3) | \
 931                                COUNTER_MASK(1, 4))
 932
 933 static int recv_pma_get_portsamplescontrol(struct ib_perf *pmp,
 934                                            struct ib_device *ibdev, u8 port)
 935 {
 936         struct ib_pma_portsamplescontrol *p =
 937                 (struct ib_pma_portsamplescontrol *)pmp->data;
 938         struct ipath_ibdev *dev = to_idev(ibdev);
 939         unsigned long flags;
 940         u8 port_select = p->port_select;
 941
 942         memset(pmp->data, 0, sizeof(pmp->data));
 943
 944         p->port_select = port_select;
 945         if (pmp->attr_mod != 0 ||
 946             (port_select != port && port_select != 0xFF))
 947                 pmp->status |= IB_SMP_INVALID_FIELD;
 948         /*
 949          * Ticks are 10x the link transfer period which for 2.5Gbs is 4
 950          * nsec.  0 == 4 nsec., 1 == 8 nsec., ..., 255 == 1020 nsec.  Sample
 951          * intervals are counted in ticks.  Since we use Linux timers, that
 952          * count in jiffies, we can't sample for less than 1000 ticks if HZ
 953          * == 1000 (4000 ticks if HZ is 250).
 954          */
 955         /* XXX This is WRONG. */
 956         p->tick = 250;          /* 1 usec. */
 957         p->counter_width = 4;   /* 32 bit counters */
 958         p->counter_mask0_9 = COUNTER_MASK0_9;
 959         spin_lock_irqsave(&dev->pending_lock, flags);
 960         p->sample_status = dev->pma_sample_status;
 961         p->sample_start = cpu_to_be32(dev->pma_sample_start);
 962         p->sample_interval = cpu_to_be32(dev->pma_sample_interval);
 963         p->tag = cpu_to_be16(dev->pma_tag);
 964         p->counter_select[0] = dev->pma_counter_select[0];
 965         p->counter_select[1] = dev->pma_counter_select[1];
 966         p->counter_select[2] = dev->pma_counter_select[2];
 967         p->counter_select[3] = dev->pma_counter_select[3];
 968         p->counter_select[4] = dev->pma_counter_select[4];
 969         spin_unlock_irqrestore(&dev->pending_lock, flags);
 970
 971         return reply((struct ib_smp *) pmp);
 972 }
 973
 974 static int recv_pma_set_portsamplescontrol(struct ib_perf *pmp,
 975                                            struct ib_device *ibdev, u8 port)
 976 {
 977         struct ib_pma_portsamplescontrol *p =
 978                 (struct ib_pma_portsamplescontrol *)pmp->data;
 979         struct ipath_ibdev *dev = to_idev(ibdev);
 980         unsigned long flags;
 981         u32 start;
 982         int ret;
 983
 984         if (pmp->attr_mod != 0 ||
 985             (p->port_select != port && p->port_select != 0xFF)) {
 986                 pmp->status |= IB_SMP_INVALID_FIELD;
 987                 ret = reply((struct ib_smp *) pmp);
 988                 goto bail;
 989         }
 990
 991         start = be32_to_cpu(p->sample_start);
 992         if (start != 0) {
 993                 spin_lock_irqsave(&dev->pending_lock, flags);
 994                 if (dev->pma_sample_status == IB_PMA_SAMPLE_STATUS_DONE) {
 995                         dev->pma_sample_status =
 996                                 IB_PMA_SAMPLE_STATUS_STARTED;
 997                         dev->pma_sample_start = start;
 998                         dev->pma_sample_interval =
 999                                 be32_to_cpu(p->sample_interval);
1000                         dev->pma_tag = be16_to_cpu(p->tag);
1001                         if (p->counter_select[0])
1002                                 dev->pma_counter_select[0] =
1003                                         p->counter_select[0];
1004                         if (p->counter_select[1])
1005                                 dev->pma_counter_select[1] =
1006                                         p->counter_select[1];
1007                         if (p->counter_select[2])
1008                                 dev->pma_counter_select[2] =
1009                                         p->counter_select[2];
1010                         if (p->counter_select[3])
1011                                 dev->pma_counter_select[3] =
1012                                         p->counter_select[3];
1013                         if (p->counter_select[4])
1014                                 dev->pma_counter_select[4] =
1015                                         p->counter_select[4];
1016                 }
1017                 spin_unlock_irqrestore(&dev->pending_lock, flags);
1018         }
1019         ret = recv_pma_get_portsamplescontrol(pmp, ibdev, port);
1020
1021 bail:
1022         return ret;
1023 }
1024
1025 static u64 get_counter(struct ipath_ibdev *dev, __be16 sel)
1026 {
1027         u64 ret;
1028
1029         switch (sel) {
1030         case IB_PMA_PORT_XMIT_DATA:
1031                 ret = dev->ipath_sword;
1032                 break;
1033         case IB_PMA_PORT_RCV_DATA:
1034                 ret = dev->ipath_rword;
1035                 break;
1036         case IB_PMA_PORT_XMIT_PKTS:
1037                 ret = dev->ipath_spkts;
1038                 break;
1039         case IB_PMA_PORT_RCV_PKTS:
1040                 ret = dev->ipath_rpkts;
1041                 break;
1042         case IB_PMA_PORT_XMIT_WAIT:
1043                 ret = dev->ipath_xmit_wait;
1044                 break;
1045         default:
1046                 ret = 0;
1047         }
1048
1049         return ret;
1050 }
1051
1052 static int recv_pma_get_portsamplesresult(struct ib_perf *pmp,
1053                                           struct ib_device *ibdev)
1054 {
1055         struct ib_pma_portsamplesresult *p =
1056                 (struct ib_pma_portsamplesresult *)pmp->data;
1057         struct ipath_ibdev *dev = to_idev(ibdev);
1058         int i;
1059
1060         memset(pmp->data, 0, sizeof(pmp->data));
1061         p->tag = cpu_to_be16(dev->pma_tag);
1062         p->sample_status = cpu_to_be16(dev->pma_sample_status);
1063         for (i = 0; i < ARRAY_SIZE(dev->pma_counter_select); i++)
1064                 p->counter[i] = cpu_to_be32(
1065                         get_counter(dev, dev->pma_counter_select[i]));
1066
1067         return reply((struct ib_smp *) pmp);
1068 }
1069
1070 static int recv_pma_get_portsamplesresult_ext(struct ib_perf *pmp,
1071                                               struct ib_device *ibdev)
1072 {
1073         struct ib_pma_portsamplesresult_ext *p =
1074                 (struct ib_pma_portsamplesresult_ext *)pmp->data;
1075         struct ipath_ibdev *dev = to_idev(ibdev);
1076         int i;
1077
1078         memset(pmp->data, 0, sizeof(pmp->data));
1079         p->tag = cpu_to_be16(dev->pma_tag);
1080         p->sample_status = cpu_to_be16(dev->pma_sample_status);
1081         /* 64 bits */
1082         p->extended_width = __constant_cpu_to_be32(0x80000000);
1083         for (i = 0; i < ARRAY_SIZE(dev->pma_counter_select); i++)
1084                 p->counter[i] = cpu_to_be64(
1085                         get_counter(dev, dev->pma_counter_select[i]));
1086
1087         return reply((struct ib_smp *) pmp);
1088 }
1089
1090 static int recv_pma_get_portcounters(struct ib_perf *pmp,
1091                                      struct ib_device *ibdev, u8 port)
1092 {
1093         struct ib_pma_portcounters *p = (struct ib_pma_portcounters *)
1094                 pmp->data;
1095         struct ipath_ibdev *dev = to_idev(ibdev);
1096         struct ipath_verbs_counters cntrs;
1097         u8 port_select = p->port_select;
1098
1099         ipath_get_counters(dev->dd, &cntrs);
1100
1101         /* Adjust counters for any resets done. */
1102         cntrs.symbol_error_counter -= dev->z_symbol_error_counter;
1103         cntrs.link_error_recovery_counter -=
1104                 dev->z_link_error_recovery_counter;
1105         cntrs.link_downed_counter -= dev->z_link_downed_counter;
1106         cntrs.port_rcv_errors += dev->rcv_errors;
1107         cntrs.port_rcv_errors -= dev->z_port_rcv_errors;
1108         cntrs.port_rcv_remphys_errors -= dev->z_port_rcv_remphys_errors;
1109         cntrs.port_xmit_discards -= dev->z_port_xmit_discards;
1110         cntrs.port_xmit_data -= dev->z_port_xmit_data;
1111         cntrs.port_rcv_data -= dev->z_port_rcv_data;
1112         cntrs.port_xmit_packets -= dev->z_port_xmit_packets;
1113         cntrs.port_rcv_packets -= dev->z_port_rcv_packets;
1114         cntrs.local_link_integrity_errors -=
1115                 dev->z_local_link_integrity_errors;
1116         cntrs.excessive_buffer_overrun_errors -=
1117                 dev->z_excessive_buffer_overrun_errors;
1118
1119         memset(pmp->data, 0, sizeof(pmp->data));
1120
1121         p->port_select = port_select;
1122         if (pmp->attr_mod != 0 ||
1123             (port_select != port && port_select != 0xFF))
1124                 pmp->status |= IB_SMP_INVALID_FIELD;
1125
1126         if (cntrs.symbol_error_counter > 0xFFFFUL)
1127                 p->symbol_error_counter = __constant_cpu_to_be16(0xFFFF);
1128         else
1129                 p->symbol_error_counter =
1130                         cpu_to_be16((u16)cntrs.symbol_error_counter);
1131         if (cntrs.link_error_recovery_counter > 0xFFUL)
1132                 p->link_error_recovery_counter = 0xFF;
1133         else
1134                 p->link_error_recovery_counter =
1135                         (u8)cntrs.link_error_recovery_counter;
1136         if (cntrs.link_downed_counter > 0xFFUL)
1137                 p->link_downed_counter = 0xFF;
1138         else
1139                 p->link_downed_counter = (u8)cntrs.link_downed_counter;
1140         if (cntrs.port_rcv_errors > 0xFFFFUL)
1141                 p->port_rcv_errors = __constant_cpu_to_be16(0xFFFF);
1142         else
1143                 p->port_rcv_errors =
1144                         cpu_to_be16((u16) cntrs.port_rcv_errors);
1145         if (cntrs.port_rcv_remphys_errors > 0xFFFFUL)
1146                 p->port_rcv_remphys_errors = __constant_cpu_to_be16(0xFFFF);
1147         else
1148                 p->port_rcv_remphys_errors =
1149                         cpu_to_be16((u16)cntrs.port_rcv_remphys_errors);
1150         if (cntrs.port_xmit_discards > 0xFFFFUL)
1151                 p->port_xmit_discards = __constant_cpu_to_be16(0xFFFF);
1152         else
1153                 p->port_xmit_discards =
1154                         cpu_to_be16((u16)cntrs.port_xmit_discards);
1155         if (cntrs.local_link_integrity_errors > 0xFUL)
1156                 cntrs.local_link_integrity_errors = 0xFUL;
1157         if (cntrs.excessive_buffer_overrun_errors > 0xFUL)
1158                 cntrs.excessive_buffer_overrun_errors = 0xFUL;
1159         p->lli_ebor_errors = (cntrs.local_link_integrity_errors << 4) |
1160                 cntrs.excessive_buffer_overrun_errors;
1161         if (dev->n_vl15_dropped > 0xFFFFUL)
1162                 p->vl15_dropped = __constant_cpu_to_be16(0xFFFF);
1163         else
1164                 p->vl15_dropped = cpu_to_be16((u16)dev->n_vl15_dropped);
1165         if (cntrs.port_xmit_data > 0xFFFFFFFFUL)
1166                 p->port_xmit_data = __constant_cpu_to_be32(0xFFFFFFFF);
1167         else
1168                 p->port_xmit_data = cpu_to_be32((u32)cntrs.port_xmit_data);
1169         if (cntrs.port_rcv_data > 0xFFFFFFFFUL)
1170                 p->port_rcv_data = __constant_cpu_to_be32(0xFFFFFFFF);
1171         else
1172                 p->port_rcv_data = cpu_to_be32((u32)cntrs.port_rcv_data);
1173         if (cntrs.port_xmit_packets > 0xFFFFFFFFUL)
1174                 p->port_xmit_packets = __constant_cpu_to_be32(0xFFFFFFFF);
1175         else
1176                 p->port_xmit_packets =
1177                         cpu_to_be32((u32)cntrs.port_xmit_packets);
1178         if (cntrs.port_rcv_packets > 0xFFFFFFFFUL)
1179                 p->port_rcv_packets = __constant_cpu_to_be32(0xFFFFFFFF);
1180         else
1181                 p->port_rcv_packets =
1182                         cpu_to_be32((u32) cntrs.port_rcv_packets);
1183
1184         return reply((struct ib_smp *) pmp);
1185 }
1186
1187 static int recv_pma_get_portcounters_ext(struct ib_perf *pmp,
1188                                          struct ib_device *ibdev, u8 port)
1189 {
1190         struct ib_pma_portcounters_ext *p =
1191                 (struct ib_pma_portcounters_ext *)pmp->data;
1192         struct ipath_ibdev *dev = to_idev(ibdev);
1193         u64 swords, rwords, spkts, rpkts, xwait;
1194         u8 port_select = p->port_select;
1195
1196         ipath_snapshot_counters(dev->dd, &swords, &rwords, &spkts,
1197                                 &rpkts, &xwait);
1198
1199         /* Adjust counters for any resets done. */
1200         swords -= dev->z_port_xmit_data;
1201         rwords -= dev->z_port_rcv_data;
1202         spkts -= dev->z_port_xmit_packets;
1203         rpkts -= dev->z_port_rcv_packets;
1204
1205         memset(pmp->data, 0, sizeof(pmp->data));
1206
1207         p->port_select = port_select;
1208         if (pmp->attr_mod != 0 ||
1209             (port_select != port && port_select != 0xFF))
1210                 pmp->status |= IB_SMP_INVALID_FIELD;
1211
1212         p->port_xmit_data = cpu_to_be64(swords);
1213         p->port_rcv_data = cpu_to_be64(rwords);
1214         p->port_xmit_packets = cpu_to_be64(spkts);
1215         p->port_rcv_packets = cpu_to_be64(rpkts);
1216         p->port_unicast_xmit_packets = cpu_to_be64(dev->n_unicast_xmit);
1217         p->port_unicast_rcv_packets = cpu_to_be64(dev->n_unicast_rcv);
1218         p->port_multicast_xmit_packets = cpu_to_be64(dev->n_multicast_xmit);
1219         p->port_multicast_rcv_packets = cpu_to_be64(dev->n_multicast_rcv);
1220
1221         return reply((struct ib_smp *) pmp);
1222 }
1223
1224 static int recv_pma_set_portcounters(struct ib_perf *pmp,
1225                                      struct ib_device *ibdev, u8 port)
1226 {
1227         struct ib_pma_portcounters *p = (struct ib_pma_portcounters *)
1228                 pmp->data;
1229         struct ipath_ibdev *dev = to_idev(ibdev);
1230         struct ipath_verbs_counters cntrs;
1231
1232         /*
1233          * Since the HW doesn't support clearing counters, we save the
1234          * current count and subtract it from future responses.
1235          */
1236         ipath_get_counters(dev->dd, &cntrs);
1237
1238         if (p->counter_select & IB_PMA_SEL_SYMBOL_ERROR)
1239                 dev->z_symbol_error_counter = cntrs.symbol_error_counter;
1240
1241         if (p->counter_select & IB_PMA_SEL_LINK_ERROR_RECOVERY)
1242                 dev->z_link_error_recovery_counter =
1243                         cntrs.link_error_recovery_counter;
1244
1245         if (p->counter_select & IB_PMA_SEL_LINK_DOWNED)
1246                 dev->z_link_downed_counter = cntrs.link_downed_counter;
1247
1248         if (p->counter_select & IB_PMA_SEL_PORT_RCV_ERRORS)
1249                 dev->z_port_rcv_errors =
1250                         cntrs.port_rcv_errors + dev->rcv_errors;
1251
1252         if (p->counter_select & IB_PMA_SEL_PORT_RCV_REMPHYS_ERRORS)
1253                 dev->z_port_rcv_remphys_errors =
1254                         cntrs.port_rcv_remphys_errors;
1255
1256         if (p->counter_select & IB_PMA_SEL_PORT_XMIT_DISCARDS)
1257                 dev->z_port_xmit_discards = cntrs.port_xmit_discards;
1258
1259         if (p->counter_select & IB_PMA_SEL_LOCAL_LINK_INTEGRITY_ERRORS)
1260                 dev->z_local_link_integrity_errors =
1261                         cntrs.local_link_integrity_errors;
1262
1263         if (p->counter_select & IB_PMA_SEL_EXCESSIVE_BUFFER_OVERRUNS)
1264                 dev->z_excessive_buffer_overrun_errors =
1265                         cntrs.excessive_buffer_overrun_errors;
1266
1267         if (p->counter_select & IB_PMA_SEL_PORT_VL15_DROPPED)
1268                 dev->n_vl15_dropped = 0;
1269
1270         if (p->counter_select & IB_PMA_SEL_PORT_XMIT_DATA)
1271                 dev->z_port_xmit_data = cntrs.port_xmit_data;
1272
1273         if (p->counter_select & IB_PMA_SEL_PORT_RCV_DATA)
1274                 dev->z_port_rcv_data = cntrs.port_rcv_data;
1275
1276         if (p->counter_select & IB_PMA_SEL_PORT_XMIT_PACKETS)
1277                 dev->z_port_xmit_packets = cntrs.port_xmit_packets;
1278
1279         if (p->counter_select & IB_PMA_SEL_PORT_RCV_PACKETS)
1280                 dev->z_port_rcv_packets = cntrs.port_rcv_packets;
1281
1282         return recv_pma_get_portcounters(pmp, ibdev, port);
1283 }
1284
1285 static int recv_pma_set_portcounters_ext(struct ib_perf *pmp,
1286                                          struct ib_device *ibdev, u8 port)
1287 {
1288         struct ib_pma_portcounters *p = (struct ib_pma_portcounters *)
1289                 pmp->data;
1290         struct ipath_ibdev *dev = to_idev(ibdev);
1291         u64 swords, rwords, spkts, rpkts, xwait;
1292
1293         ipath_snapshot_counters(dev->dd, &swords, &rwords, &spkts,
1294                                 &rpkts, &xwait);
1295
1296         if (p->counter_select & IB_PMA_SELX_PORT_XMIT_DATA)
1297                 dev->z_port_xmit_data = swords;
1298
1299         if (p->counter_select & IB_PMA_SELX_PORT_RCV_DATA)
1300                 dev->z_port_rcv_data = rwords;
1301
1302         if (p->counter_select & IB_PMA_SELX_PORT_XMIT_PACKETS)
1303                 dev->z_port_xmit_packets = spkts;
1304
1305         if (p->counter_select & IB_PMA_SELX_PORT_RCV_PACKETS)
1306                 dev->z_port_rcv_packets = rpkts;
1307
1308         if (p->counter_select & IB_PMA_SELX_PORT_UNI_XMIT_PACKETS)
1309                 dev->n_unicast_xmit = 0;
1310
1311         if (p->counter_select & IB_PMA_SELX_PORT_UNI_RCV_PACKETS)
1312                 dev->n_unicast_rcv = 0;
1313
1314         if (p->counter_select & IB_PMA_SELX_PORT_MULTI_XMIT_PACKETS)
1315                 dev->n_multicast_xmit = 0;
1316
1317         if (p->counter_select & IB_PMA_SELX_PORT_MULTI_RCV_PACKETS)
1318                 dev->n_multicast_rcv = 0;
1319
1320         return recv_pma_get_portcounters_ext(pmp, ibdev, port);
1321 }
1322
1323 static int process_subn(struct ib_device *ibdev, int mad_flags,
1324                         u8 port_num, struct ib_mad *in_mad,
1325                         struct ib_mad *out_mad)
1326 {
1327         struct ib_smp *smp = (struct ib_smp *)out_mad;
1328         struct ipath_ibdev *dev = to_idev(ibdev);
1329         int ret;
1330
1331         *out_mad = *in_mad;
1332         if (smp->class_version != 1) {
1333                 smp->status |= IB_SMP_UNSUP_VERSION;
1334                 ret = reply(smp);
1335                 goto bail;
1336         }
1337
1338         /* Is the mkey in the process of expiring? */
1339         if (dev->mkey_lease_timeout && jiffies >= dev->mkey_lease_timeout) {
1340                 /* Clear timeout and mkey protection field. */
1341                 dev->mkey_lease_timeout = 0;
1342                 dev->mkeyprot_resv_lmc &= 0x3F;
1343         }
1344
1345         /*
1346          * M_Key checking depends on
1347          * Portinfo:M_Key_protect_bits
1348          */
1349         if ((mad_flags & IB_MAD_IGNORE_MKEY) == 0 && dev->mkey != 0 &&
1350             dev->mkey != smp->mkey &&
1351             (smp->method == IB_MGMT_METHOD_SET ||
1352              (smp->method == IB_MGMT_METHOD_GET &&
1353               (dev->mkeyprot_resv_lmc >> 7) != 0))) {
1354                 if (dev->mkey_violations != 0xFFFF)
1355                         ++dev->mkey_violations;
1356                 if (dev->mkey_lease_timeout ||
1357                     dev->mkey_lease_period == 0) {
1358                         ret = IB_MAD_RESULT_SUCCESS |
1359                                 IB_MAD_RESULT_CONSUMED;
1360                         goto bail;
1361                 }
1362                 dev->mkey_lease_timeout = jiffies +
1363                         dev->mkey_lease_period * HZ;
1364                 /* Future: Generate a trap notice. */
1365                 ret = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
1366                 goto bail;
1367         } else if (dev->mkey_lease_timeout)
1368                 dev->mkey_lease_timeout = 0;
1369
1370         switch (smp->method) {
1371         case IB_MGMT_METHOD_GET:
1372                 switch (smp->attr_id) {
1373                 case IB_SMP_ATTR_NODE_DESC:
1374                         ret = recv_subn_get_nodedescription(smp, ibdev);
1375                         goto bail;
1376                 case IB_SMP_ATTR_NODE_INFO:
1377                         ret = recv_subn_get_nodeinfo(smp, ibdev, port_num);
1378                         goto bail;
1379                 case IB_SMP_ATTR_GUID_INFO:
1380                         ret = recv_subn_get_guidinfo(smp, ibdev);
1381                         goto bail;
1382                 case IB_SMP_ATTR_PORT_INFO:
1383                         ret = recv_subn_get_portinfo(smp, ibdev, port_num);
1384                         goto bail;
1385                 case IB_SMP_ATTR_PKEY_TABLE:
1386                         ret = recv_subn_get_pkeytable(smp, ibdev);
1387                         goto bail;
1388                 case IB_SMP_ATTR_SM_INFO:
1389                         if (dev->port_cap_flags & IB_PORT_SM_DISABLED) {
1390                                 ret = IB_MAD_RESULT_SUCCESS |
1391                                         IB_MAD_RESULT_CONSUMED;
1392                                 goto bail;
1393                         }
1394                         if (dev->port_cap_flags & IB_PORT_SM) {
1395                                 ret = IB_MAD_RESULT_SUCCESS;
1396                                 goto bail;
1397                         }
1398                         /* FALLTHROUGH */
1399                 default:
1400                         smp->status |= IB_SMP_UNSUP_METH_ATTR;
1401                         ret = reply(smp);
1402                         goto bail;
1403                 }
1404
1405         case IB_MGMT_METHOD_SET:
1406                 switch (smp->attr_id) {
1407                 case IB_SMP_ATTR_GUID_INFO:
1408                         ret = recv_subn_set_guidinfo(smp, ibdev);
1409                         goto bail;
1410                 case IB_SMP_ATTR_PORT_INFO:
1411                         ret = recv_subn_set_portinfo(smp, ibdev, port_num);
1412                         goto bail;
1413                 case IB_SMP_ATTR_PKEY_TABLE:
1414                         ret = recv_subn_set_pkeytable(smp, ibdev);
1415                         goto bail;
1416                 case IB_SMP_ATTR_SM_INFO:
1417                         if (dev->port_cap_flags & IB_PORT_SM_DISABLED) {
1418                                 ret = IB_MAD_RESULT_SUCCESS |
1419                                         IB_MAD_RESULT_CONSUMED;
1420                                 goto bail;
1421                         }
1422                         if (dev->port_cap_flags & IB_PORT_SM) {
1423                                 ret = IB_MAD_RESULT_SUCCESS;
1424                                 goto bail;
1425                         }
1426                         /* FALLTHROUGH */
1427                 default:
1428                         smp->status |= IB_SMP_UNSUP_METH_ATTR;
1429                         ret = reply(smp);
1430                         goto bail;
1431                 }
1432
1433         case IB_MGMT_METHOD_GET_RESP:
1434                 /*
1435                  * The ib_mad module will call us to process responses
1436                  * before checking for other consumers.
1437                  * Just tell the caller to process it normally.
1438                  */
1439                 ret = IB_MAD_RESULT_FAILURE;
1440                 goto bail;
1441         default:
1442                 smp->status |= IB_SMP_UNSUP_METHOD;
1443                 ret = reply(smp);
1444         }
1445
1446 bail:
1447         return ret;
1448 }
1449
1450 static int process_perf(struct ib_device *ibdev, u8 port_num,
1451                         struct ib_mad *in_mad,
1452                         struct ib_mad *out_mad)
1453 {
1454         struct ib_perf *pmp = (struct ib_perf *)out_mad;
1455         int ret;
1456
1457         *out_mad = *in_mad;
1458         if (pmp->class_version != 1) {
1459                 pmp->status |= IB_SMP_UNSUP_VERSION;
1460                 ret = reply((struct ib_smp *) pmp);
1461                 goto bail;
1462         }
1463
1464         switch (pmp->method) {
1465         case IB_MGMT_METHOD_GET:
1466                 switch (pmp->attr_id) {
1467                 case IB_PMA_CLASS_PORT_INFO:
1468                         ret = recv_pma_get_classportinfo(pmp);
1469                         goto bail;
1470                 case IB_PMA_PORT_SAMPLES_CONTROL:
1471                         ret = recv_pma_get_portsamplescontrol(pmp, ibdev,
1472                                                               port_num);
1473                         goto bail;
1474                 case IB_PMA_PORT_SAMPLES_RESULT:
1475                         ret = recv_pma_get_portsamplesresult(pmp, ibdev);
1476                         goto bail;
1477                 case IB_PMA_PORT_SAMPLES_RESULT_EXT:
1478                         ret = recv_pma_get_portsamplesresult_ext(pmp,
1479                                                                  ibdev);
1480                         goto bail;
1481                 case IB_PMA_PORT_COUNTERS:
1482                         ret = recv_pma_get_portcounters(pmp, ibdev,
1483                                                         port_num);
1484                         goto bail;
1485                 case IB_PMA_PORT_COUNTERS_EXT:
1486                         ret = recv_pma_get_portcounters_ext(pmp, ibdev,
1487                                                             port_num);
1488                         goto bail;
1489                 default:
1490                         pmp->status |= IB_SMP_UNSUP_METH_ATTR;
1491                         ret = reply((struct ib_smp *) pmp);
1492                         goto bail;
1493                 }
1494
1495         case IB_MGMT_METHOD_SET:
1496                 switch (pmp->attr_id) {
1497                 case IB_PMA_PORT_SAMPLES_CONTROL:
1498                         ret = recv_pma_set_portsamplescontrol(pmp, ibdev,
1499                                                               port_num);
1500                         goto bail;
1501                 case IB_PMA_PORT_COUNTERS:
1502                         ret = recv_pma_set_portcounters(pmp, ibdev,
1503                                                         port_num);
1504                         goto bail;
1505                 case IB_PMA_PORT_COUNTERS_EXT:
1506                         ret = recv_pma_set_portcounters_ext(pmp, ibdev,
1507                                                             port_num);
1508                         goto bail;
1509                 default:
1510                         pmp->status |= IB_SMP_UNSUP_METH_ATTR;
1511                         ret = reply((struct ib_smp *) pmp);
1512                         goto bail;
1513                 }
1514
1515         case IB_MGMT_METHOD_GET_RESP:
1516                 /*
1517                  * The ib_mad module will call us to process responses
1518                  * before checking for other consumers.
1519                  * Just tell the caller to process it normally.
1520                  */
1521                 ret = IB_MAD_RESULT_FAILURE;
1522                 goto bail;
1523         default:
1524                 pmp->status |= IB_SMP_UNSUP_METHOD;
1525                 ret = reply((struct ib_smp *) pmp);
1526         }
1527
1528 bail:
1529         return ret;
1530 }
1531
1532 /**
1533  * ipath_process_mad - process an incoming MAD packet
1534  * @ibdev: the infiniband device this packet came in on
1535  * @mad_flags: MAD flags
1536  * @port_num: the port number this packet came in on
1537  * @in_wc: the work completion entry for this packet
1538  * @in_grh: the global route header for this packet
1539  * @in_mad: the incoming MAD
1540  * @out_mad: any outgoing MAD reply
1541  *
1542  * Returns IB_MAD_RESULT_SUCCESS if this is a MAD that we are not
1543  * interested in processing.
1544  *
1545  * Note that the verbs framework has already done the MAD sanity checks,
1546  * and hop count/pointer updating for IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
1547  * MADs.
1548  *
1549  * This is called by the ib_mad module.
1550  */
1551 int ipath_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
1552                       struct ib_wc *in_wc, struct ib_grh *in_grh,
1553                       struct ib_mad *in_mad, struct ib_mad *out_mad)
1554 {
1555         int ret;
1556
1557         switch (in_mad->mad_hdr.mgmt_class) {
1558         case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
1559         case IB_MGMT_CLASS_SUBN_LID_ROUTED:
1560                 ret = process_subn(ibdev, mad_flags, port_num,
1561                                    in_mad, out_mad);
1562                 goto bail;
1563         case IB_MGMT_CLASS_PERF_MGMT:
1564                 ret = process_perf(ibdev, port_num, in_mad, out_mad);
1565                 goto bail;
1566         default:
1567                 ret = IB_MAD_RESULT_SUCCESS;
1568         }
1569
1570 bail:
1571         return ret;
1572 }