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         /* GUID 0 is illegal */
  91         if (smp->attr_mod || (dd->ipath_guid == 0))
  92                 smp->status |= IB_SMP_INVALID_FIELD;
  93
  94         nip->base_version = 1;
  95         nip->class_version = 1;
  96         nip->node_type = 1;     /* channel adapter */
  97         /*
  98          * XXX The num_ports value will need a layer function to get
  99          * the value if we ever have more than one IB port on a chip.
 100          * We will also need to get the GUID for the port.
 101          */
 102         nip->num_ports = ibdev->phys_port_cnt;
 103         /* This is already in network order */
 104         nip->sys_guid = to_idev(ibdev)->sys_image_guid;
 105         nip->node_guid = dd->ipath_guid;
 106         nip->port_guid = nip->sys_guid;
 107         nip->partition_cap = cpu_to_be16(ipath_get_npkeys(dd));
 108         nip->device_id = cpu_to_be16(dd->ipath_deviceid);
 109         majrev = dd->ipath_majrev;
 110         minrev = dd->ipath_minrev;
 111         nip->revision = cpu_to_be32((majrev << 16) | minrev);
 112         nip->local_port_num = port;
 113         vendor = dd->ipath_vendorid;
 114         nip->vendor_id[0] = 0;
 115         nip->vendor_id[1] = vendor >> 8;
 116         nip->vendor_id[2] = vendor;
 117
 118         return reply(smp);
 119 }
 120
 121 static int recv_subn_get_guidinfo(struct ib_smp *smp,
 122                                   struct ib_device *ibdev)
 123 {
 124         u32 startgx = 8 * be32_to_cpu(smp->attr_mod);
 125         __be64 *p = (__be64 *) smp->data;
 126
 127         /* 32 blocks of 8 64-bit GUIDs per block */
 128
 129         memset(smp->data, 0, sizeof(smp->data));
 130
 131         /*
 132          * We only support one GUID for now.  If this changes, the
 133          * portinfo.guid_cap field needs to be updated too.
 134          */
 135         if (startgx == 0) {
 136                 __be64 g = to_idev(ibdev)->dd->ipath_guid;
 137                 if (g == 0)
 138                         /* GUID 0 is illegal */
 139                         smp->status |= IB_SMP_INVALID_FIELD;
 140                 else
 141                         /* The first is a copy of the read-only HW GUID. */
 142                         *p = g;
 143         } else
 144                 smp->status |= IB_SMP_INVALID_FIELD;
 145
 146         return reply(smp);
 147 }
 148
 149
 150 static int get_overrunthreshold(struct ipath_devdata *dd)
 151 {
 152         return (dd->ipath_ibcctrl >>
 153                 INFINIPATH_IBCC_OVERRUNTHRESHOLD_SHIFT) &
 154                 INFINIPATH_IBCC_OVERRUNTHRESHOLD_MASK;
 155 }
 156
 157 /**
 158  * set_overrunthreshold - set the overrun threshold
 159  * @dd: the infinipath device
 160  * @n: the new threshold
 161  *
 162  * Note that this will only take effect when the link state changes.
 163  */
 164 static int set_overrunthreshold(struct ipath_devdata *dd, unsigned n)
 165 {
 166         unsigned v;
 167
 168         v = (dd->ipath_ibcctrl >> INFINIPATH_IBCC_OVERRUNTHRESHOLD_SHIFT) &
 169                 INFINIPATH_IBCC_OVERRUNTHRESHOLD_MASK;
 170         if (v != n) {
 171                 dd->ipath_ibcctrl &=
 172                         ~(INFINIPATH_IBCC_OVERRUNTHRESHOLD_MASK <<
 173                           INFINIPATH_IBCC_OVERRUNTHRESHOLD_SHIFT);
 174                 dd->ipath_ibcctrl |=
 175                         (u64) n << INFINIPATH_IBCC_OVERRUNTHRESHOLD_SHIFT;
 176                 ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl,
 177                                  dd->ipath_ibcctrl);
 178         }
 179         return 0;
 180 }
 181
 182 static int get_phyerrthreshold(struct ipath_devdata *dd)
 183 {
 184         return (dd->ipath_ibcctrl >>
 185                 INFINIPATH_IBCC_PHYERRTHRESHOLD_SHIFT) &
 186                 INFINIPATH_IBCC_PHYERRTHRESHOLD_MASK;
 187 }
 188
 189 /**
 190  * set_phyerrthreshold - set the physical error threshold
 191  * @dd: the infinipath device
 192  * @n: the new threshold
 193  *
 194  * Note that this will only take effect when the link state changes.
 195  */
 196 static int set_phyerrthreshold(struct ipath_devdata *dd, unsigned n)
 197 {
 198         unsigned v;
 199
 200         v = (dd->ipath_ibcctrl >> INFINIPATH_IBCC_PHYERRTHRESHOLD_SHIFT) &
 201                 INFINIPATH_IBCC_PHYERRTHRESHOLD_MASK;
 202         if (v != n) {
 203                 dd->ipath_ibcctrl &=
 204                         ~(INFINIPATH_IBCC_PHYERRTHRESHOLD_MASK <<
 205                           INFINIPATH_IBCC_PHYERRTHRESHOLD_SHIFT);
 206                 dd->ipath_ibcctrl |=
 207                         (u64) n << INFINIPATH_IBCC_PHYERRTHRESHOLD_SHIFT;
 208                 ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl,
 209                                  dd->ipath_ibcctrl);
 210         }
 211         return 0;
 212 }
 213
 214 /**
 215  * get_linkdowndefaultstate - get the default linkdown state
 216  * @dd: the infinipath device
 217  *
 218  * Returns zero if the default is POLL, 1 if the default is SLEEP.
 219  */
 220 static int get_linkdowndefaultstate(struct ipath_devdata *dd)
 221 {
 222         return !!(dd->ipath_ibcctrl & INFINIPATH_IBCC_LINKDOWNDEFAULTSTATE);
 223 }
 224
 225 static int recv_subn_get_portinfo(struct ib_smp *smp,
 226                                   struct ib_device *ibdev, u8 port)
 227 {
 228         struct ipath_ibdev *dev;
 229         struct ib_port_info *pip = (struct ib_port_info *)smp->data;
 230         u16 lid;
 231         u8 ibcstat;
 232         u8 mtu;
 233         int ret;
 234
 235         if (be32_to_cpu(smp->attr_mod) > ibdev->phys_port_cnt) {
 236                 smp->status |= IB_SMP_INVALID_FIELD;
 237                 ret = reply(smp);
 238                 goto bail;
 239         }
 240
 241         dev = to_idev(ibdev);
 242
 243         /* Clear all fields.  Only set the non-zero fields. */
 244         memset(smp->data, 0, sizeof(smp->data));
 245
 246         /* Only return the mkey if the protection field allows it. */
 247         if (smp->method == IB_MGMT_METHOD_SET || dev->mkey == smp->mkey ||
 248             (dev->mkeyprot_resv_lmc >> 6) == 0)
 249                 pip->mkey = dev->mkey;
 250         pip->gid_prefix = dev->gid_prefix;
 251         lid = dev->dd->ipath_lid;
 252         pip->lid = lid ? cpu_to_be16(lid) : IB_LID_PERMISSIVE;
 253         pip->sm_lid = cpu_to_be16(dev->sm_lid);
 254         pip->cap_mask = cpu_to_be32(dev->port_cap_flags);
 255         /* pip->diag_code; */
 256         pip->mkey_lease_period = cpu_to_be16(dev->mkey_lease_period);
 257         pip->local_port_num = port;
 258         pip->link_width_enabled = dev->link_width_enabled;
 259         pip->link_width_supported = 3;  /* 1x or 4x */
 260         pip->link_width_active = 2;     /* 4x */
 261         pip->linkspeed_portstate = 0x10;        /* 2.5Gbps */
 262         ibcstat = dev->dd->ipath_lastibcstat;
 263         pip->linkspeed_portstate |= ((ibcstat >> 4) & 0x3) + 1;
 264         pip->portphysstate_linkdown =
 265                 (ipath_cvt_physportstate[ibcstat & 0xf] << 4) |
 266                 (get_linkdowndefaultstate(dev->dd) ? 1 : 2);
 267         pip->mkeyprot_resv_lmc = dev->mkeyprot_resv_lmc;
 268         pip->linkspeedactive_enabled = 0x11;    /* 2.5Gbps, 2.5Gbps */
 269         switch (dev->dd->ipath_ibmtu) {
 270         case 4096:
 271                 mtu = IB_MTU_4096;
 272                 break;
 273         case 2048:
 274                 mtu = IB_MTU_2048;
 275                 break;
 276         case 1024:
 277                 mtu = IB_MTU_1024;
 278                 break;
 279         case 512:
 280                 mtu = IB_MTU_512;
 281                 break;
 282         case 256:
 283                 mtu = IB_MTU_256;
 284                 break;
 285         default:                /* oops, something is wrong */
 286                 mtu = IB_MTU_2048;
 287                 break;
 288         }
 289         pip->neighbormtu_mastersmsl = (mtu << 4) | dev->sm_sl;
 290         pip->vlcap_inittype = 0x10;     /* VLCap = VL0, InitType = 0 */
 291         pip->vl_high_limit = dev->vl_high_limit;
 292         /* pip->vl_arb_high_cap; // only one VL */
 293         /* pip->vl_arb_low_cap; // only one VL */
 294         /* InitTypeReply = 0 */
 295         pip->inittypereply_mtucap = IB_MTU_4096;
 296         // HCAs ignore VLStallCount and HOQLife
 297         /* pip->vlstallcnt_hoqlife; */
 298         pip->operationalvl_pei_peo_fpi_fpo = 0x10;      /* OVLs = 1 */
 299         pip->mkey_violations = cpu_to_be16(dev->mkey_violations);
 300         /* P_KeyViolations are counted by hardware. */
 301         pip->pkey_violations =
 302                 cpu_to_be16((ipath_get_cr_errpkey(dev->dd) -
 303                              dev->z_pkey_violations) & 0xFFFF);
 304         pip->qkey_violations = cpu_to_be16(dev->qkey_violations);
 305         /* Only the hardware GUID is supported for now */
 306         pip->guid_cap = 1;
 307         pip->clientrereg_resv_subnetto = dev->subnet_timeout;
 308         /* 32.768 usec. response time (guessing) */
 309         pip->resv_resptimevalue = 3;
 310         pip->localphyerrors_overrunerrors =
 311                 (get_phyerrthreshold(dev->dd) << 4) |
 312                 get_overrunthreshold(dev->dd);
 313         /* pip->max_credit_hint; */
 314         /* pip->link_roundtrip_latency[3]; */
 315
 316         ret = reply(smp);
 317
 318 bail:
 319         return ret;
 320 }
 321
 322 /**
 323  * get_pkeys - return the PKEY table for port 0
 324  * @dd: the infinipath device
 325  * @pkeys: the pkey table is placed here
 326  */
 327 static int get_pkeys(struct ipath_devdata *dd, u16 * pkeys)
 328 {
 329         struct ipath_portdata *pd = dd->ipath_pd[0];
 330
 331         memcpy(pkeys, pd->port_pkeys, sizeof(pd->port_pkeys));
 332
 333         return 0;
 334 }
 335
 336 static int recv_subn_get_pkeytable(struct ib_smp *smp,
 337                                    struct ib_device *ibdev)
 338 {
 339         u32 startpx = 32 * (be32_to_cpu(smp->attr_mod) & 0xffff);
 340         u16 *p = (u16 *) smp->data;
 341         __be16 *q = (__be16 *) smp->data;
 342
 343         /* 64 blocks of 32 16-bit P_Key entries */
 344
 345         memset(smp->data, 0, sizeof(smp->data));
 346         if (startpx == 0) {
 347                 struct ipath_ibdev *dev = to_idev(ibdev);
 348                 unsigned i, n = ipath_get_npkeys(dev->dd);
 349
 350                 get_pkeys(dev->dd, p);
 351
 352                 for (i = 0; i < n; i++)
 353                         q[i] = cpu_to_be16(p[i]);
 354         } else
 355                 smp->status |= IB_SMP_INVALID_FIELD;
 356
 357         return reply(smp);
 358 }
 359
 360 static int recv_subn_set_guidinfo(struct ib_smp *smp,
 361                                   struct ib_device *ibdev)
 362 {
 363         /* The only GUID we support is the first read-only entry. */
 364         return recv_subn_get_guidinfo(smp, ibdev);
 365 }
 366
 367 /**
 368  * set_linkdowndefaultstate - set the default linkdown state
 369  * @dd: the infinipath device
 370  * @sleep: the new state
 371  *
 372  * Note that this will only take effect when the link state changes.
 373  */
 374 static int set_linkdowndefaultstate(struct ipath_devdata *dd, int sleep)
 375 {
 376         if (sleep)
 377                 dd->ipath_ibcctrl |= INFINIPATH_IBCC_LINKDOWNDEFAULTSTATE;
 378         else
 379                 dd->ipath_ibcctrl &= ~INFINIPATH_IBCC_LINKDOWNDEFAULTSTATE;
 380         ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl,
 381                          dd->ipath_ibcctrl);
 382         return 0;
 383 }
 384
 385 /**
 386  * recv_subn_set_portinfo - set port information
 387  * @smp: the incoming SM packet
 388  * @ibdev: the infiniband device
 389  * @port: the port on the device
 390  *
 391  * Set Portinfo (see ch. 14.2.5.6).
 392  */
 393 static int recv_subn_set_portinfo(struct ib_smp *smp,
 394                                   struct ib_device *ibdev, u8 port)
 395 {
 396         struct ib_port_info *pip = (struct ib_port_info *)smp->data;
 397         struct ib_event event;
 398         struct ipath_ibdev *dev;
 399         u32 flags;
 400         char clientrereg = 0;
 401         u16 lid, smlid;
 402         u8 lwe;
 403         u8 lse;
 404         u8 state;
 405         u16 lstate;
 406         u32 mtu;
 407         int ret, ore;
 408
 409         if (be32_to_cpu(smp->attr_mod) > ibdev->phys_port_cnt)
 410                 goto err;
 411
 412         dev = to_idev(ibdev);
 413         event.device = ibdev;
 414         event.element.port_num = port;
 415
 416         dev->mkey = pip->mkey;
 417         dev->gid_prefix = pip->gid_prefix;
 418         dev->mkey_lease_period = be16_to_cpu(pip->mkey_lease_period);
 419
 420         lid = be16_to_cpu(pip->lid);
 421         if (lid != dev->dd->ipath_lid) {
 422                 /* Must be a valid unicast LID address. */
 423                 if (lid == 0 || lid >= IPATH_MULTICAST_LID_BASE)
 424                         goto err;
 425                 ipath_set_lid(dev->dd, lid, pip->mkeyprot_resv_lmc & 7);
 426                 event.event = IB_EVENT_LID_CHANGE;
 427                 ib_dispatch_event(&event);
 428         }
 429
 430         smlid = be16_to_cpu(pip->sm_lid);
 431         if (smlid != dev->sm_lid) {
 432                 /* Must be a valid unicast LID address. */
 433                 if (smlid == 0 || smlid >= IPATH_MULTICAST_LID_BASE)
 434                         goto err;
 435                 dev->sm_lid = smlid;
 436                 event.event = IB_EVENT_SM_CHANGE;
 437                 ib_dispatch_event(&event);
 438         }
 439
 440         /* Only 4x supported but allow 1x or 4x to be set (see 14.2.6.6). */
 441         lwe = pip->link_width_enabled;
 442         if ((lwe >= 4 && lwe <= 8) || (lwe >= 0xC && lwe <= 0xFE))
 443                 goto err;
 444         if (lwe == 0xFF)
 445                 dev->link_width_enabled = 3;    /* 1x or 4x */
 446         else if (lwe)
 447                 dev->link_width_enabled = lwe;
 448
 449         /* Only 2.5 Gbs supported. */
 450         lse = pip->linkspeedactive_enabled & 0xF;
 451         if (lse >= 2 && lse <= 0xE)
 452                 goto err;
 453
 454         /* Set link down default state. */
 455         switch (pip->portphysstate_linkdown & 0xF) {
 456         case 0: /* NOP */
 457                 break;
 458         case 1: /* SLEEP */
 459                 if (set_linkdowndefaultstate(dev->dd, 1))
 460                         goto err;
 461                 break;
 462         case 2: /* POLL */
 463                 if (set_linkdowndefaultstate(dev->dd, 0))
 464                         goto err;
 465                 break;
 466         default:
 467                 goto err;
 468         }
 469
 470         dev->mkeyprot_resv_lmc = pip->mkeyprot_resv_lmc;
 471         dev->vl_high_limit = pip->vl_high_limit;
 472
 473         switch ((pip->neighbormtu_mastersmsl >> 4) & 0xF) {
 474         case IB_MTU_256:
 475                 mtu = 256;
 476                 break;
 477         case IB_MTU_512:
 478                 mtu = 512;
 479                 break;
 480         case IB_MTU_1024:
 481                 mtu = 1024;
 482                 break;
 483         case IB_MTU_2048:
 484                 mtu = 2048;
 485                 break;
 486         case IB_MTU_4096:
 487                 mtu = 4096;
 488                 break;
 489         default:
 490                 /* XXX We have already partially updated our state! */
 491                 goto err;
 492         }
 493         ipath_set_mtu(dev->dd, mtu);
 494
 495         dev->sm_sl = pip->neighbormtu_mastersmsl & 0xF;
 496
 497         /* We only support VL0 */
 498         if (((pip->operationalvl_pei_peo_fpi_fpo >> 4) & 0xF) > 1)
 499                 goto err;
 500
 501         if (pip->mkey_violations == 0)
 502                 dev->mkey_violations = 0;
 503
 504         /*
 505          * Hardware counter can't be reset so snapshot and subtract
 506          * later.
 507          */
 508         if (pip->pkey_violations == 0)
 509                 dev->z_pkey_violations = ipath_get_cr_errpkey(dev->dd);
 510
 511         if (pip->qkey_violations == 0)
 512                 dev->qkey_violations = 0;
 513
 514         ore = pip->localphyerrors_overrunerrors;
 515         if (set_phyerrthreshold(dev->dd, (ore >> 4) & 0xF))
 516                 goto err;
 517
 518         if (set_overrunthreshold(dev->dd, (ore & 0xF)))
 519                 goto err;
 520
 521         dev->subnet_timeout = pip->clientrereg_resv_subnetto & 0x1F;
 522
 523         if (pip->clientrereg_resv_subnetto & 0x80) {
 524                 clientrereg = 1;
 525                 event.event = IB_EVENT_CLIENT_REREGISTER;
 526                 ib_dispatch_event(&event);
 527         }
 528
 529         /*
 530          * Do the port state change now that the other link parameters
 531          * have been set.
 532          * Changing the port physical state only makes sense if the link
 533          * is down or is being set to down.
 534          */
 535         state = pip->linkspeed_portstate & 0xF;
 536         flags = dev->dd->ipath_flags;
 537         lstate = (pip->portphysstate_linkdown >> 4) & 0xF;
 538         if (lstate && !(state == IB_PORT_DOWN || state == IB_PORT_NOP))
 539                 goto err;
 540
 541         /*
 542          * Only state changes of DOWN, ARM, and ACTIVE are valid
 543          * and must be in the correct state to take effect (see 7.2.6).
 544          */
 545         switch (state) {
 546         case IB_PORT_NOP:
 547                 if (lstate == 0)
 548                         break;
 549                 /* FALLTHROUGH */
 550         case IB_PORT_DOWN:
 551                 if (lstate == 0)
 552                         if (get_linkdowndefaultstate(dev->dd))
 553                                 lstate = IPATH_IB_LINKDOWN_SLEEP;
 554                         else
 555                                 lstate = IPATH_IB_LINKDOWN;
 556                 else if (lstate == 1)
 557                         lstate = IPATH_IB_LINKDOWN_SLEEP;
 558                 else if (lstate == 2)
 559                         lstate = IPATH_IB_LINKDOWN;
 560                 else if (lstate == 3)
 561                         lstate = IPATH_IB_LINKDOWN_DISABLE;
 562                 else
 563                         goto err;
 564                 ipath_set_linkstate(dev->dd, lstate);
 565                 if (flags & IPATH_LINKACTIVE) {
 566                         event.event = IB_EVENT_PORT_ERR;
 567                         ib_dispatch_event(&event);
 568                 }
 569                 break;
 570         case IB_PORT_ARMED:
 571                 if (!(flags & (IPATH_LINKINIT | IPATH_LINKACTIVE)))
 572                         break;
 573                 ipath_set_linkstate(dev->dd, IPATH_IB_LINKARM);
 574                 if (flags & IPATH_LINKACTIVE) {
 575                         event.event = IB_EVENT_PORT_ERR;
 576                         ib_dispatch_event(&event);
 577                 }
 578                 break;
 579         case IB_PORT_ACTIVE:
 580                 if (!(flags & IPATH_LINKARMED))
 581                         break;
 582                 ipath_set_linkstate(dev->dd, IPATH_IB_LINKACTIVE);
 583                 event.event = IB_EVENT_PORT_ACTIVE;
 584                 ib_dispatch_event(&event);
 585                 break;
 586         default:
 587                 /* XXX We have already partially updated our state! */
 588                 goto err;
 589         }
 590
 591         ret = recv_subn_get_portinfo(smp, ibdev, port);
 592
 593         if (clientrereg)
 594                 pip->clientrereg_resv_subnetto |= 0x80;
 595
 596         goto done;
 597
 598 err:
 599         smp->status |= IB_SMP_INVALID_FIELD;
 600         ret = recv_subn_get_portinfo(smp, ibdev, port);
 601
 602 done:
 603         return ret;
 604 }
 605
 606 /**
 607  * rm_pkey - decrecment the reference count for the given PKEY
 608  * @dd: the infinipath device
 609  * @key: the PKEY index
 610  *
 611  * Return true if this was the last reference and the hardware table entry
 612  * needs to be changed.
 613  */
 614 static int rm_pkey(struct ipath_devdata *dd, u16 key)
 615 {
 616         int i;
 617         int ret;
 618
 619         for (i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) {
 620                 if (dd->ipath_pkeys[i] != key)
 621                         continue;
 622                 if (atomic_dec_and_test(&dd->ipath_pkeyrefs[i])) {
 623                         dd->ipath_pkeys[i] = 0;
 624                         ret = 1;
 625                         goto bail;
 626                 }
 627                 break;
 628         }
 629
 630         ret = 0;
 631
 632 bail:
 633         return ret;
 634 }
 635
 636 /**
 637  * add_pkey - add the given PKEY to the hardware table
 638  * @dd: the infinipath device
 639  * @key: the PKEY
 640  *
 641  * Return an error code if unable to add the entry, zero if no change,
 642  * or 1 if the hardware PKEY register needs to be updated.
 643  */
 644 static int add_pkey(struct ipath_devdata *dd, u16 key)
 645 {
 646         int i;
 647         u16 lkey = key & 0x7FFF;
 648         int any = 0;
 649         int ret;
 650
 651         if (lkey == 0x7FFF) {
 652                 ret = 0;
 653                 goto bail;
 654         }
 655
 656         /* Look for an empty slot or a matching PKEY. */
 657         for (i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) {
 658                 if (!dd->ipath_pkeys[i]) {
 659                         any++;
 660                         continue;
 661                 }
 662                 /* If it matches exactly, try to increment the ref count */
 663                 if (dd->ipath_pkeys[i] == key) {
 664                         if (atomic_inc_return(&dd->ipath_pkeyrefs[i]) > 1) {
 665                                 ret = 0;
 666                                 goto bail;
 667                         }
 668                         /* Lost the race. Look for an empty slot below. */
 669                         atomic_dec(&dd->ipath_pkeyrefs[i]);
 670                         any++;
 671                 }
 672                 /*
 673                  * It makes no sense to have both the limited and unlimited
 674                  * PKEY set at the same time since the unlimited one will
 675                  * disable the limited one.
 676                  */
 677                 if ((dd->ipath_pkeys[i] & 0x7FFF) == lkey) {
 678                         ret = -EEXIST;
 679                         goto bail;
 680                 }
 681         }
 682         if (!any) {
 683                 ret = -EBUSY;
 684                 goto bail;
 685         }
 686         for (i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) {
 687                 if (!dd->ipath_pkeys[i] &&
 688                     atomic_inc_return(&dd->ipath_pkeyrefs[i]) == 1) {
 689                         /* for ipathstats, etc. */
 690                         ipath_stats.sps_pkeys[i] = lkey;
 691                         dd->ipath_pkeys[i] = key;
 692                         ret = 1;
 693                         goto bail;
 694                 }
 695         }
 696         ret = -EBUSY;
 697
 698 bail:
 699         return ret;
 700 }
 701
 702 /**
 703  * set_pkeys - set the PKEY table for port 0
 704  * @dd: the infinipath device
 705  * @pkeys: the PKEY table
 706  */
 707 static int set_pkeys(struct ipath_devdata *dd, u16 *pkeys)
 708 {
 709         struct ipath_portdata *pd;
 710         int i;
 711         int changed = 0;
 712
 713         pd = dd->ipath_pd[0];
 714
 715         for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) {
 716                 u16 key = pkeys[i];
 717                 u16 okey = pd->port_pkeys[i];
 718
 719                 if (key == okey)
 720                         continue;
 721                 /*
 722                  * The value of this PKEY table entry is changing.
 723                  * Remove the old entry in the hardware's array of PKEYs.
 724                  */
 725                 if (okey & 0x7FFF)
 726                         changed |= rm_pkey(dd, okey);
 727                 if (key & 0x7FFF) {
 728                         int ret = add_pkey(dd, key);
 729
 730                         if (ret < 0)
 731                                 key = 0;
 732                         else
 733                                 changed |= ret;
 734                 }
 735                 pd->port_pkeys[i] = key;
 736         }
 737         if (changed) {
 738                 u64 pkey;
 739
 740                 pkey = (u64) dd->ipath_pkeys[0] |
 741                         ((u64) dd->ipath_pkeys[1] << 16) |
 742                         ((u64) dd->ipath_pkeys[2] << 32) |
 743                         ((u64) dd->ipath_pkeys[3] << 48);
 744                 ipath_cdbg(VERBOSE, "p0 new pkey reg %llx\n",
 745                            (unsigned long long) pkey);
 746                 ipath_write_kreg(dd, dd->ipath_kregs->kr_partitionkey,
 747                                  pkey);
 748         }
 749         return 0;
 750 }
 751
 752 static int recv_subn_set_pkeytable(struct ib_smp *smp,
 753                                    struct ib_device *ibdev)
 754 {
 755         u32 startpx = 32 * (be32_to_cpu(smp->attr_mod) & 0xffff);
 756         __be16 *p = (__be16 *) smp->data;
 757         u16 *q = (u16 *) smp->data;
 758         struct ipath_ibdev *dev = to_idev(ibdev);
 759         unsigned i, n = ipath_get_npkeys(dev->dd);
 760
 761         for (i = 0; i < n; i++)
 762                 q[i] = be16_to_cpu(p[i]);
 763
 764         if (startpx != 0 || set_pkeys(dev->dd, q) != 0)
 765                 smp->status |= IB_SMP_INVALID_FIELD;
 766
 767         return recv_subn_get_pkeytable(smp, ibdev);
 768 }
 769
 770 #define IB_PMA_CLASS_PORT_INFO          __constant_htons(0x0001)
 771 #define IB_PMA_PORT_SAMPLES_CONTROL     __constant_htons(0x0010)
 772 #define IB_PMA_PORT_SAMPLES_RESULT      __constant_htons(0x0011)
 773 #define IB_PMA_PORT_COUNTERS            __constant_htons(0x0012)
 774 #define IB_PMA_PORT_COUNTERS_EXT        __constant_htons(0x001D)
 775 #define IB_PMA_PORT_SAMPLES_RESULT_EXT  __constant_htons(0x001E)
 776
 777 struct ib_perf {
 778         u8 base_version;
 779         u8 mgmt_class;
 780         u8 class_version;
 781         u8 method;
 782         __be16 status;
 783         __be16 unused;
 784         __be64 tid;
 785         __be16 attr_id;
 786         __be16 resv;
 787         __be32 attr_mod;
 788         u8 reserved[40];
 789         u8 data[192];
 790 } __attribute__ ((packed));
 791
 792 struct ib_pma_classportinfo {
 793         u8 base_version;
 794         u8 class_version;
 795         __be16 cap_mask;
 796         u8 reserved[3];
 797         u8 resp_time_value;     /* only lower 5 bits */
 798         union ib_gid redirect_gid;
 799         __be32 redirect_tc_sl_fl;       /* 8, 4, 20 bits respectively */
 800         __be16 redirect_lid;
 801         __be16 redirect_pkey;
 802         __be32 redirect_qp;     /* only lower 24 bits */
 803         __be32 redirect_qkey;
 804         union ib_gid trap_gid;
 805         __be32 trap_tc_sl_fl;   /* 8, 4, 20 bits respectively */
 806         __be16 trap_lid;
 807         __be16 trap_pkey;
 808         __be32 trap_hl_qp;      /* 8, 24 bits respectively */
 809         __be32 trap_qkey;
 810 } __attribute__ ((packed));
 811
 812 struct ib_pma_portsamplescontrol {
 813         u8 opcode;
 814         u8 port_select;
 815         u8 tick;
 816         u8 counter_width;       /* only lower 3 bits */
 817         __be32 counter_mask0_9; /* 2, 10 * 3, bits */
 818         __be16 counter_mask10_14;       /* 1, 5 * 3, bits */
 819         u8 sample_mechanisms;
 820         u8 sample_status;       /* only lower 2 bits */
 821         __be64 option_mask;
 822         __be64 vendor_mask;
 823         __be32 sample_start;
 824         __be32 sample_interval;
 825         __be16 tag;
 826         __be16 counter_select[15];
 827 } __attribute__ ((packed));
 828
 829 struct ib_pma_portsamplesresult {
 830         __be16 tag;
 831         __be16 sample_status;   /* only lower 2 bits */
 832         __be32 counter[15];
 833 } __attribute__ ((packed));
 834
 835 struct ib_pma_portsamplesresult_ext {
 836         __be16 tag;
 837         __be16 sample_status;   /* only lower 2 bits */
 838         __be32 extended_width;  /* only upper 2 bits */
 839         __be64 counter[15];
 840 } __attribute__ ((packed));
 841
 842 struct ib_pma_portcounters {
 843         u8 reserved;
 844         u8 port_select;
 845         __be16 counter_select;
 846         __be16 symbol_error_counter;
 847         u8 link_error_recovery_counter;
 848         u8 link_downed_counter;
 849         __be16 port_rcv_errors;
 850         __be16 port_rcv_remphys_errors;
 851         __be16 port_rcv_switch_relay_errors;
 852         __be16 port_xmit_discards;
 853         u8 port_xmit_constraint_errors;
 854         u8 port_rcv_constraint_errors;
 855         u8 reserved1;
 856         u8 lli_ebor_errors;     /* 4, 4, bits */
 857         __be16 reserved2;
 858         __be16 vl15_dropped;
 859         __be32 port_xmit_data;
 860         __be32 port_rcv_data;
 861         __be32 port_xmit_packets;
 862         __be32 port_rcv_packets;
 863 } __attribute__ ((packed));
 864
 865 #define IB_PMA_SEL_SYMBOL_ERROR                 __constant_htons(0x0001)
 866 #define IB_PMA_SEL_LINK_ERROR_RECOVERY          __constant_htons(0x0002)
 867 #define IB_PMA_SEL_LINK_DOWNED                  __constant_htons(0x0004)
 868 #define IB_PMA_SEL_PORT_RCV_ERRORS              __constant_htons(0x0008)
 869 #define IB_PMA_SEL_PORT_RCV_REMPHYS_ERRORS      __constant_htons(0x0010)
 870 #define IB_PMA_SEL_PORT_XMIT_DISCARDS           __constant_htons(0x0040)
 871 #define IB_PMA_SEL_LOCAL_LINK_INTEGRITY_ERRORS  __constant_htons(0x0200)
 872 #define IB_PMA_SEL_EXCESSIVE_BUFFER_OVERRUNS    __constant_htons(0x0400)
 873 #define IB_PMA_SEL_PORT_VL15_DROPPED            __constant_htons(0x0800)
 874 #define IB_PMA_SEL_PORT_XMIT_DATA               __constant_htons(0x1000)
 875 #define IB_PMA_SEL_PORT_RCV_DATA                __constant_htons(0x2000)
 876 #define IB_PMA_SEL_PORT_XMIT_PACKETS            __constant_htons(0x4000)
 877 #define IB_PMA_SEL_PORT_RCV_PACKETS             __constant_htons(0x8000)
 878
 879 struct ib_pma_portcounters_ext {
 880         u8 reserved;
 881         u8 port_select;
 882         __be16 counter_select;
 883         __be32 reserved1;
 884         __be64 port_xmit_data;
 885         __be64 port_rcv_data;
 886         __be64 port_xmit_packets;
 887         __be64 port_rcv_packets;
 888         __be64 port_unicast_xmit_packets;
 889         __be64 port_unicast_rcv_packets;
 890         __be64 port_multicast_xmit_packets;
 891         __be64 port_multicast_rcv_packets;
 892 } __attribute__ ((packed));
 893
 894 #define IB_PMA_SELX_PORT_XMIT_DATA              __constant_htons(0x0001)
 895 #define IB_PMA_SELX_PORT_RCV_DATA               __constant_htons(0x0002)
 896 #define IB_PMA_SELX_PORT_XMIT_PACKETS           __constant_htons(0x0004)
 897 #define IB_PMA_SELX_PORT_RCV_PACKETS            __constant_htons(0x0008)
 898 #define IB_PMA_SELX_PORT_UNI_XMIT_PACKETS       __constant_htons(0x0010)
 899 #define IB_PMA_SELX_PORT_UNI_RCV_PACKETS        __constant_htons(0x0020)
 900 #define IB_PMA_SELX_PORT_MULTI_XMIT_PACKETS     __constant_htons(0x0040)
 901 #define IB_PMA_SELX_PORT_MULTI_RCV_PACKETS      __constant_htons(0x0080)
 902
 903 static int recv_pma_get_classportinfo(struct ib_perf *pmp)
 904 {
 905         struct ib_pma_classportinfo *p =
 906                 (struct ib_pma_classportinfo *)pmp->data;
 907
 908         memset(pmp->data, 0, sizeof(pmp->data));
 909
 910         if (pmp->attr_mod != 0)
 911                 pmp->status |= IB_SMP_INVALID_FIELD;
 912
 913         /* Indicate AllPortSelect is valid (only one port anyway) */
 914         p->cap_mask = __constant_cpu_to_be16(1 << 8);
 915         p->base_version = 1;
 916         p->class_version = 1;
 917         /*
 918          * Expected response time is 4.096 usec. * 2^18 == 1.073741824
 919          * sec.
 920          */
 921         p->resp_time_value = 18;
 922
 923         return reply((struct ib_smp *) pmp);
 924 }
 925
 926 /*
 927  * The PortSamplesControl.CounterMasks field is an array of 3 bit fields
 928  * which specify the N'th counter's capabilities. See ch. 16.1.3.2.
 929  * We support 5 counters which only count the mandatory quantities.
 930  */
 931 #define COUNTER_MASK(q, n) (q << ((9 - n) * 3))
 932 #define COUNTER_MASK0_9 \
 933         __constant_cpu_to_be32(COUNTER_MASK(1, 0) | \
 934                                COUNTER_MASK(1, 1) | \
 935                                COUNTER_MASK(1, 2) | \
 936                                COUNTER_MASK(1, 3) | \
 937                                COUNTER_MASK(1, 4))
 938
 939 static int recv_pma_get_portsamplescontrol(struct ib_perf *pmp,
 940                                            struct ib_device *ibdev, u8 port)
 941 {
 942         struct ib_pma_portsamplescontrol *p =
 943                 (struct ib_pma_portsamplescontrol *)pmp->data;
 944         struct ipath_ibdev *dev = to_idev(ibdev);
 945         unsigned long flags;
 946         u8 port_select = p->port_select;
 947
 948         memset(pmp->data, 0, sizeof(pmp->data));
 949
 950         p->port_select = port_select;
 951         if (pmp->attr_mod != 0 ||
 952             (port_select != port && port_select != 0xFF))
 953                 pmp->status |= IB_SMP_INVALID_FIELD;
 954         /*
 955          * Ticks are 10x the link transfer period which for 2.5Gbs is 4
 956          * nsec.  0 == 4 nsec., 1 == 8 nsec., ..., 255 == 1020 nsec.  Sample
 957          * intervals are counted in ticks.  Since we use Linux timers, that
 958          * count in jiffies, we can't sample for less than 1000 ticks if HZ
 959          * == 1000 (4000 ticks if HZ is 250).
 960          */
 961         /* XXX This is WRONG. */
 962         p->tick = 250;          /* 1 usec. */
 963         p->counter_width = 4;   /* 32 bit counters */
 964         p->counter_mask0_9 = COUNTER_MASK0_9;
 965         spin_lock_irqsave(&dev->pending_lock, flags);
 966         p->sample_status = dev->pma_sample_status;
 967         p->sample_start = cpu_to_be32(dev->pma_sample_start);
 968         p->sample_interval = cpu_to_be32(dev->pma_sample_interval);
 969         p->tag = cpu_to_be16(dev->pma_tag);
 970         p->counter_select[0] = dev->pma_counter_select[0];
 971         p->counter_select[1] = dev->pma_counter_select[1];
 972         p->counter_select[2] = dev->pma_counter_select[2];
 973         p->counter_select[3] = dev->pma_counter_select[3];
 974         p->counter_select[4] = dev->pma_counter_select[4];
 975         spin_unlock_irqrestore(&dev->pending_lock, flags);
 976
 977         return reply((struct ib_smp *) pmp);
 978 }
 979
 980 static int recv_pma_set_portsamplescontrol(struct ib_perf *pmp,
 981                                            struct ib_device *ibdev, u8 port)
 982 {
 983         struct ib_pma_portsamplescontrol *p =
 984                 (struct ib_pma_portsamplescontrol *)pmp->data;
 985         struct ipath_ibdev *dev = to_idev(ibdev);
 986         unsigned long flags;
 987         u32 start;
 988         int ret;
 989
 990         if (pmp->attr_mod != 0 ||
 991             (p->port_select != port && p->port_select != 0xFF)) {
 992                 pmp->status |= IB_SMP_INVALID_FIELD;
 993                 ret = reply((struct ib_smp *) pmp);
 994                 goto bail;
 995         }
 996
 997         start = be32_to_cpu(p->sample_start);
 998         if (start != 0) {
 999                 spin_lock_irqsave(&dev->pending_lock, flags);
1000                 if (dev->pma_sample_status == IB_PMA_SAMPLE_STATUS_DONE) {
1001                         dev->pma_sample_status =
1002                                 IB_PMA_SAMPLE_STATUS_STARTED;
1003                         dev->pma_sample_start = start;
1004                         dev->pma_sample_interval =
1005                                 be32_to_cpu(p->sample_interval);
1006                         dev->pma_tag = be16_to_cpu(p->tag);
1007                         if (p->counter_select[0])
1008                                 dev->pma_counter_select[0] =
1009                                         p->counter_select[0];
1010                         if (p->counter_select[1])
1011                                 dev->pma_counter_select[1] =
1012                                         p->counter_select[1];
1013                         if (p->counter_select[2])
1014                                 dev->pma_counter_select[2] =
1015                                         p->counter_select[2];
1016                         if (p->counter_select[3])
1017                                 dev->pma_counter_select[3] =
1018                                         p->counter_select[3];
1019                         if (p->counter_select[4])
1020                                 dev->pma_counter_select[4] =
1021                                         p->counter_select[4];
1022                 }
1023                 spin_unlock_irqrestore(&dev->pending_lock, flags);
1024         }
1025         ret = recv_pma_get_portsamplescontrol(pmp, ibdev, port);
1026
1027 bail:
1028         return ret;
1029 }
1030
1031 static u64 get_counter(struct ipath_ibdev *dev, __be16 sel)
1032 {
1033         u64 ret;
1034
1035         switch (sel) {
1036         case IB_PMA_PORT_XMIT_DATA:
1037                 ret = dev->ipath_sword;
1038                 break;
1039         case IB_PMA_PORT_RCV_DATA:
1040                 ret = dev->ipath_rword;
1041                 break;
1042         case IB_PMA_PORT_XMIT_PKTS:
1043                 ret = dev->ipath_spkts;
1044                 break;
1045         case IB_PMA_PORT_RCV_PKTS:
1046                 ret = dev->ipath_rpkts;
1047                 break;
1048         case IB_PMA_PORT_XMIT_WAIT:
1049                 ret = dev->ipath_xmit_wait;
1050                 break;
1051         default:
1052                 ret = 0;
1053         }
1054
1055         return ret;
1056 }
1057
1058 static int recv_pma_get_portsamplesresult(struct ib_perf *pmp,
1059                                           struct ib_device *ibdev)
1060 {
1061         struct ib_pma_portsamplesresult *p =
1062                 (struct ib_pma_portsamplesresult *)pmp->data;
1063         struct ipath_ibdev *dev = to_idev(ibdev);
1064         int i;
1065
1066         memset(pmp->data, 0, sizeof(pmp->data));
1067         p->tag = cpu_to_be16(dev->pma_tag);
1068         p->sample_status = cpu_to_be16(dev->pma_sample_status);
1069         for (i = 0; i < ARRAY_SIZE(dev->pma_counter_select); i++)
1070                 p->counter[i] = cpu_to_be32(
1071                         get_counter(dev, dev->pma_counter_select[i]));
1072
1073         return reply((struct ib_smp *) pmp);
1074 }
1075
1076 static int recv_pma_get_portsamplesresult_ext(struct ib_perf *pmp,
1077                                               struct ib_device *ibdev)
1078 {
1079         struct ib_pma_portsamplesresult_ext *p =
1080                 (struct ib_pma_portsamplesresult_ext *)pmp->data;
1081         struct ipath_ibdev *dev = to_idev(ibdev);
1082         int i;
1083
1084         memset(pmp->data, 0, sizeof(pmp->data));
1085         p->tag = cpu_to_be16(dev->pma_tag);
1086         p->sample_status = cpu_to_be16(dev->pma_sample_status);
1087         /* 64 bits */
1088         p->extended_width = __constant_cpu_to_be32(0x80000000);
1089         for (i = 0; i < ARRAY_SIZE(dev->pma_counter_select); i++)
1090                 p->counter[i] = cpu_to_be64(
1091                         get_counter(dev, dev->pma_counter_select[i]));
1092
1093         return reply((struct ib_smp *) pmp);
1094 }
1095
1096 static int recv_pma_get_portcounters(struct ib_perf *pmp,
1097                                      struct ib_device *ibdev, u8 port)
1098 {
1099         struct ib_pma_portcounters *p = (struct ib_pma_portcounters *)
1100                 pmp->data;
1101         struct ipath_ibdev *dev = to_idev(ibdev);
1102         struct ipath_verbs_counters cntrs;
1103         u8 port_select = p->port_select;
1104
1105         ipath_get_counters(dev->dd, &cntrs);
1106
1107         /* Adjust counters for any resets done. */
1108         cntrs.symbol_error_counter -= dev->z_symbol_error_counter;
1109         cntrs.link_error_recovery_counter -=
1110                 dev->z_link_error_recovery_counter;
1111         cntrs.link_downed_counter -= dev->z_link_downed_counter;
1112         cntrs.port_rcv_errors += dev->rcv_errors;
1113         cntrs.port_rcv_errors -= dev->z_port_rcv_errors;
1114         cntrs.port_rcv_remphys_errors -= dev->z_port_rcv_remphys_errors;
1115         cntrs.port_xmit_discards -= dev->z_port_xmit_discards;
1116         cntrs.port_xmit_data -= dev->z_port_xmit_data;
1117         cntrs.port_rcv_data -= dev->z_port_rcv_data;
1118         cntrs.port_xmit_packets -= dev->z_port_xmit_packets;
1119         cntrs.port_rcv_packets -= dev->z_port_rcv_packets;
1120         cntrs.local_link_integrity_errors -=
1121                 dev->z_local_link_integrity_errors;
1122         cntrs.excessive_buffer_overrun_errors -=
1123                 dev->z_excessive_buffer_overrun_errors;
1124
1125         memset(pmp->data, 0, sizeof(pmp->data));
1126
1127         p->port_select = port_select;
1128         if (pmp->attr_mod != 0 ||
1129             (port_select != port && port_select != 0xFF))
1130                 pmp->status |= IB_SMP_INVALID_FIELD;
1131
1132         if (cntrs.symbol_error_counter > 0xFFFFUL)
1133                 p->symbol_error_counter = __constant_cpu_to_be16(0xFFFF);
1134         else
1135                 p->symbol_error_counter =
1136                         cpu_to_be16((u16)cntrs.symbol_error_counter);
1137         if (cntrs.link_error_recovery_counter > 0xFFUL)
1138                 p->link_error_recovery_counter = 0xFF;
1139         else
1140                 p->link_error_recovery_counter =
1141                         (u8)cntrs.link_error_recovery_counter;
1142         if (cntrs.link_downed_counter > 0xFFUL)
1143                 p->link_downed_counter = 0xFF;
1144         else
1145                 p->link_downed_counter = (u8)cntrs.link_downed_counter;
1146         if (cntrs.port_rcv_errors > 0xFFFFUL)
1147                 p->port_rcv_errors = __constant_cpu_to_be16(0xFFFF);
1148         else
1149                 p->port_rcv_errors =
1150                         cpu_to_be16((u16) cntrs.port_rcv_errors);
1151         if (cntrs.port_rcv_remphys_errors > 0xFFFFUL)
1152                 p->port_rcv_remphys_errors = __constant_cpu_to_be16(0xFFFF);
1153         else
1154                 p->port_rcv_remphys_errors =
1155                         cpu_to_be16((u16)cntrs.port_rcv_remphys_errors);
1156         if (cntrs.port_xmit_discards > 0xFFFFUL)
1157                 p->port_xmit_discards = __constant_cpu_to_be16(0xFFFF);
1158         else
1159                 p->port_xmit_discards =
1160                         cpu_to_be16((u16)cntrs.port_xmit_discards);
1161         if (cntrs.local_link_integrity_errors > 0xFUL)
1162                 cntrs.local_link_integrity_errors = 0xFUL;
1163         if (cntrs.excessive_buffer_overrun_errors > 0xFUL)
1164                 cntrs.excessive_buffer_overrun_errors = 0xFUL;
1165         p->lli_ebor_errors = (cntrs.local_link_integrity_errors << 4) |
1166                 cntrs.excessive_buffer_overrun_errors;
1167         if (dev->n_vl15_dropped > 0xFFFFUL)
1168                 p->vl15_dropped = __constant_cpu_to_be16(0xFFFF);
1169         else
1170                 p->vl15_dropped = cpu_to_be16((u16)dev->n_vl15_dropped);
1171         if (cntrs.port_xmit_data > 0xFFFFFFFFUL)
1172                 p->port_xmit_data = __constant_cpu_to_be32(0xFFFFFFFF);
1173         else
1174                 p->port_xmit_data = cpu_to_be32((u32)cntrs.port_xmit_data);
1175         if (cntrs.port_rcv_data > 0xFFFFFFFFUL)
1176                 p->port_rcv_data = __constant_cpu_to_be32(0xFFFFFFFF);
1177         else
1178                 p->port_rcv_data = cpu_to_be32((u32)cntrs.port_rcv_data);
1179         if (cntrs.port_xmit_packets > 0xFFFFFFFFUL)
1180                 p->port_xmit_packets = __constant_cpu_to_be32(0xFFFFFFFF);
1181         else
1182                 p->port_xmit_packets =
1183                         cpu_to_be32((u32)cntrs.port_xmit_packets);
1184         if (cntrs.port_rcv_packets > 0xFFFFFFFFUL)
1185                 p->port_rcv_packets = __constant_cpu_to_be32(0xFFFFFFFF);
1186         else
1187                 p->port_rcv_packets =
1188                         cpu_to_be32((u32) cntrs.port_rcv_packets);
1189
1190         return reply((struct ib_smp *) pmp);
1191 }
1192
1193 static int recv_pma_get_portcounters_ext(struct ib_perf *pmp,
1194                                          struct ib_device *ibdev, u8 port)
1195 {
1196         struct ib_pma_portcounters_ext *p =
1197                 (struct ib_pma_portcounters_ext *)pmp->data;
1198         struct ipath_ibdev *dev = to_idev(ibdev);
1199         u64 swords, rwords, spkts, rpkts, xwait;
1200         u8 port_select = p->port_select;
1201
1202         ipath_snapshot_counters(dev->dd, &swords, &rwords, &spkts,
1203                                 &rpkts, &xwait);
1204
1205         /* Adjust counters for any resets done. */
1206         swords -= dev->z_port_xmit_data;
1207         rwords -= dev->z_port_rcv_data;
1208         spkts -= dev->z_port_xmit_packets;
1209         rpkts -= dev->z_port_rcv_packets;
1210
1211         memset(pmp->data, 0, sizeof(pmp->data));
1212
1213         p->port_select = port_select;
1214         if (pmp->attr_mod != 0 ||
1215             (port_select != port && port_select != 0xFF))
1216                 pmp->status |= IB_SMP_INVALID_FIELD;
1217
1218         p->port_xmit_data = cpu_to_be64(swords);
1219         p->port_rcv_data = cpu_to_be64(rwords);
1220         p->port_xmit_packets = cpu_to_be64(spkts);
1221         p->port_rcv_packets = cpu_to_be64(rpkts);
1222         p->port_unicast_xmit_packets = cpu_to_be64(dev->n_unicast_xmit);
1223         p->port_unicast_rcv_packets = cpu_to_be64(dev->n_unicast_rcv);
1224         p->port_multicast_xmit_packets = cpu_to_be64(dev->n_multicast_xmit);
1225         p->port_multicast_rcv_packets = cpu_to_be64(dev->n_multicast_rcv);
1226
1227         return reply((struct ib_smp *) pmp);
1228 }
1229
1230 static int recv_pma_set_portcounters(struct ib_perf *pmp,
1231                                      struct ib_device *ibdev, u8 port)
1232 {
1233         struct ib_pma_portcounters *p = (struct ib_pma_portcounters *)
1234                 pmp->data;
1235         struct ipath_ibdev *dev = to_idev(ibdev);
1236         struct ipath_verbs_counters cntrs;
1237
1238         /*
1239          * Since the HW doesn't support clearing counters, we save the
1240          * current count and subtract it from future responses.
1241          */
1242         ipath_get_counters(dev->dd, &cntrs);
1243
1244         if (p->counter_select & IB_PMA_SEL_SYMBOL_ERROR)
1245                 dev->z_symbol_error_counter = cntrs.symbol_error_counter;
1246
1247         if (p->counter_select & IB_PMA_SEL_LINK_ERROR_RECOVERY)
1248                 dev->z_link_error_recovery_counter =
1249                         cntrs.link_error_recovery_counter;
1250
1251         if (p->counter_select & IB_PMA_SEL_LINK_DOWNED)
1252                 dev->z_link_downed_counter = cntrs.link_downed_counter;
1253
1254         if (p->counter_select & IB_PMA_SEL_PORT_RCV_ERRORS)
1255                 dev->z_port_rcv_errors =
1256                         cntrs.port_rcv_errors + dev->rcv_errors;
1257
1258         if (p->counter_select & IB_PMA_SEL_PORT_RCV_REMPHYS_ERRORS)
1259                 dev->z_port_rcv_remphys_errors =
1260                         cntrs.port_rcv_remphys_errors;
1261
1262         if (p->counter_select & IB_PMA_SEL_PORT_XMIT_DISCARDS)
1263                 dev->z_port_xmit_discards = cntrs.port_xmit_discards;
1264
1265         if (p->counter_select & IB_PMA_SEL_LOCAL_LINK_INTEGRITY_ERRORS)
1266                 dev->z_local_link_integrity_errors =
1267                         cntrs.local_link_integrity_errors;
1268
1269         if (p->counter_select & IB_PMA_SEL_EXCESSIVE_BUFFER_OVERRUNS)
1270                 dev->z_excessive_buffer_overrun_errors =
1271                         cntrs.excessive_buffer_overrun_errors;
1272
1273         if (p->counter_select & IB_PMA_SEL_PORT_VL15_DROPPED)
1274                 dev->n_vl15_dropped = 0;
1275
1276         if (p->counter_select & IB_PMA_SEL_PORT_XMIT_DATA)
1277                 dev->z_port_xmit_data = cntrs.port_xmit_data;
1278
1279         if (p->counter_select & IB_PMA_SEL_PORT_RCV_DATA)
1280                 dev->z_port_rcv_data = cntrs.port_rcv_data;
1281
1282         if (p->counter_select & IB_PMA_SEL_PORT_XMIT_PACKETS)
1283                 dev->z_port_xmit_packets = cntrs.port_xmit_packets;
1284
1285         if (p->counter_select & IB_PMA_SEL_PORT_RCV_PACKETS)
1286                 dev->z_port_rcv_packets = cntrs.port_rcv_packets;
1287
1288         return recv_pma_get_portcounters(pmp, ibdev, port);
1289 }
1290
1291 static int recv_pma_set_portcounters_ext(struct ib_perf *pmp,
1292                                          struct ib_device *ibdev, u8 port)
1293 {
1294         struct ib_pma_portcounters *p = (struct ib_pma_portcounters *)
1295                 pmp->data;
1296         struct ipath_ibdev *dev = to_idev(ibdev);
1297         u64 swords, rwords, spkts, rpkts, xwait;
1298
1299         ipath_snapshot_counters(dev->dd, &swords, &rwords, &spkts,
1300                                 &rpkts, &xwait);
1301
1302         if (p->counter_select & IB_PMA_SELX_PORT_XMIT_DATA)
1303                 dev->z_port_xmit_data = swords;
1304
1305         if (p->counter_select & IB_PMA_SELX_PORT_RCV_DATA)
1306                 dev->z_port_rcv_data = rwords;
1307
1308         if (p->counter_select & IB_PMA_SELX_PORT_XMIT_PACKETS)
1309                 dev->z_port_xmit_packets = spkts;
1310
1311         if (p->counter_select & IB_PMA_SELX_PORT_RCV_PACKETS)
1312                 dev->z_port_rcv_packets = rpkts;
1313
1314         if (p->counter_select & IB_PMA_SELX_PORT_UNI_XMIT_PACKETS)
1315                 dev->n_unicast_xmit = 0;
1316
1317         if (p->counter_select & IB_PMA_SELX_PORT_UNI_RCV_PACKETS)
1318                 dev->n_unicast_rcv = 0;
1319
1320         if (p->counter_select & IB_PMA_SELX_PORT_MULTI_XMIT_PACKETS)
1321                 dev->n_multicast_xmit = 0;
1322
1323         if (p->counter_select & IB_PMA_SELX_PORT_MULTI_RCV_PACKETS)
1324                 dev->n_multicast_rcv = 0;
1325
1326         return recv_pma_get_portcounters_ext(pmp, ibdev, port);
1327 }
1328
1329 static int process_subn(struct ib_device *ibdev, int mad_flags,
1330                         u8 port_num, struct ib_mad *in_mad,
1331                         struct ib_mad *out_mad)
1332 {
1333         struct ib_smp *smp = (struct ib_smp *)out_mad;
1334         struct ipath_ibdev *dev = to_idev(ibdev);
1335         int ret;
1336
1337         *out_mad = *in_mad;
1338         if (smp->class_version != 1) {
1339                 smp->status |= IB_SMP_UNSUP_VERSION;
1340                 ret = reply(smp);
1341                 goto bail;
1342         }
1343
1344         /* Is the mkey in the process of expiring? */
1345         if (dev->mkey_lease_timeout && jiffies >= dev->mkey_lease_timeout) {
1346                 /* Clear timeout and mkey protection field. */
1347                 dev->mkey_lease_timeout = 0;
1348                 dev->mkeyprot_resv_lmc &= 0x3F;
1349         }
1350
1351         /*
1352          * M_Key checking depends on
1353          * Portinfo:M_Key_protect_bits
1354          */
1355         if ((mad_flags & IB_MAD_IGNORE_MKEY) == 0 && dev->mkey != 0 &&
1356             dev->mkey != smp->mkey &&
1357             (smp->method == IB_MGMT_METHOD_SET ||
1358              (smp->method == IB_MGMT_METHOD_GET &&
1359               (dev->mkeyprot_resv_lmc >> 7) != 0))) {
1360                 if (dev->mkey_violations != 0xFFFF)
1361                         ++dev->mkey_violations;
1362                 if (dev->mkey_lease_timeout ||
1363                     dev->mkey_lease_period == 0) {
1364                         ret = IB_MAD_RESULT_SUCCESS |
1365                                 IB_MAD_RESULT_CONSUMED;
1366                         goto bail;
1367                 }
1368                 dev->mkey_lease_timeout = jiffies +
1369                         dev->mkey_lease_period * HZ;
1370                 /* Future: Generate a trap notice. */
1371                 ret = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
1372                 goto bail;
1373         } else if (dev->mkey_lease_timeout)
1374                 dev->mkey_lease_timeout = 0;
1375
1376         switch (smp->method) {
1377         case IB_MGMT_METHOD_GET:
1378                 switch (smp->attr_id) {
1379                 case IB_SMP_ATTR_NODE_DESC:
1380                         ret = recv_subn_get_nodedescription(smp, ibdev);
1381                         goto bail;
1382                 case IB_SMP_ATTR_NODE_INFO:
1383                         ret = recv_subn_get_nodeinfo(smp, ibdev, port_num);
1384                         goto bail;
1385                 case IB_SMP_ATTR_GUID_INFO:
1386                         ret = recv_subn_get_guidinfo(smp, ibdev);
1387                         goto bail;
1388                 case IB_SMP_ATTR_PORT_INFO:
1389                         ret = recv_subn_get_portinfo(smp, ibdev, port_num);
1390                         goto bail;
1391                 case IB_SMP_ATTR_PKEY_TABLE:
1392                         ret = recv_subn_get_pkeytable(smp, ibdev);
1393                         goto bail;
1394                 case IB_SMP_ATTR_SM_INFO:
1395                         if (dev->port_cap_flags & IB_PORT_SM_DISABLED) {
1396                                 ret = IB_MAD_RESULT_SUCCESS |
1397                                         IB_MAD_RESULT_CONSUMED;
1398                                 goto bail;
1399                         }
1400                         if (dev->port_cap_flags & IB_PORT_SM) {
1401                                 ret = IB_MAD_RESULT_SUCCESS;
1402                                 goto bail;
1403                         }
1404                         /* FALLTHROUGH */
1405                 default:
1406                         smp->status |= IB_SMP_UNSUP_METH_ATTR;
1407                         ret = reply(smp);
1408                         goto bail;
1409                 }
1410
1411         case IB_MGMT_METHOD_SET:
1412                 switch (smp->attr_id) {
1413                 case IB_SMP_ATTR_GUID_INFO:
1414                         ret = recv_subn_set_guidinfo(smp, ibdev);
1415                         goto bail;
1416                 case IB_SMP_ATTR_PORT_INFO:
1417                         ret = recv_subn_set_portinfo(smp, ibdev, port_num);
1418                         goto bail;
1419                 case IB_SMP_ATTR_PKEY_TABLE:
1420                         ret = recv_subn_set_pkeytable(smp, ibdev);
1421                         goto bail;
1422                 case IB_SMP_ATTR_SM_INFO:
1423                         if (dev->port_cap_flags & IB_PORT_SM_DISABLED) {
1424                                 ret = IB_MAD_RESULT_SUCCESS |
1425                                         IB_MAD_RESULT_CONSUMED;
1426                                 goto bail;
1427                         }
1428                         if (dev->port_cap_flags & IB_PORT_SM) {
1429                                 ret = IB_MAD_RESULT_SUCCESS;
1430                                 goto bail;
1431                         }
1432                         /* FALLTHROUGH */
1433                 default:
1434                         smp->status |= IB_SMP_UNSUP_METH_ATTR;
1435                         ret = reply(smp);
1436                         goto bail;
1437                 }
1438
1439         case IB_MGMT_METHOD_GET_RESP:
1440                 /*
1441                  * The ib_mad module will call us to process responses
1442                  * before checking for other consumers.
1443                  * Just tell the caller to process it normally.
1444                  */
1445                 ret = IB_MAD_RESULT_FAILURE;
1446                 goto bail;
1447         default:
1448                 smp->status |= IB_SMP_UNSUP_METHOD;
1449                 ret = reply(smp);
1450         }
1451
1452 bail:
1453         return ret;
1454 }
1455
1456 static int process_perf(struct ib_device *ibdev, u8 port_num,
1457                         struct ib_mad *in_mad,
1458                         struct ib_mad *out_mad)
1459 {
1460         struct ib_perf *pmp = (struct ib_perf *)out_mad;
1461         int ret;
1462
1463         *out_mad = *in_mad;
1464         if (pmp->class_version != 1) {
1465                 pmp->status |= IB_SMP_UNSUP_VERSION;
1466                 ret = reply((struct ib_smp *) pmp);
1467                 goto bail;
1468         }
1469
1470         switch (pmp->method) {
1471         case IB_MGMT_METHOD_GET:
1472                 switch (pmp->attr_id) {
1473                 case IB_PMA_CLASS_PORT_INFO:
1474                         ret = recv_pma_get_classportinfo(pmp);
1475                         goto bail;
1476                 case IB_PMA_PORT_SAMPLES_CONTROL:
1477                         ret = recv_pma_get_portsamplescontrol(pmp, ibdev,
1478                                                               port_num);
1479                         goto bail;
1480                 case IB_PMA_PORT_SAMPLES_RESULT:
1481                         ret = recv_pma_get_portsamplesresult(pmp, ibdev);
1482                         goto bail;
1483                 case IB_PMA_PORT_SAMPLES_RESULT_EXT:
1484                         ret = recv_pma_get_portsamplesresult_ext(pmp,
1485                                                                  ibdev);
1486                         goto bail;
1487                 case IB_PMA_PORT_COUNTERS:
1488                         ret = recv_pma_get_portcounters(pmp, ibdev,
1489                                                         port_num);
1490                         goto bail;
1491                 case IB_PMA_PORT_COUNTERS_EXT:
1492                         ret = recv_pma_get_portcounters_ext(pmp, ibdev,
1493                                                             port_num);
1494                         goto bail;
1495                 default:
1496                         pmp->status |= IB_SMP_UNSUP_METH_ATTR;
1497                         ret = reply((struct ib_smp *) pmp);
1498                         goto bail;
1499                 }
1500
1501         case IB_MGMT_METHOD_SET:
1502                 switch (pmp->attr_id) {
1503                 case IB_PMA_PORT_SAMPLES_CONTROL:
1504                         ret = recv_pma_set_portsamplescontrol(pmp, ibdev,
1505                                                               port_num);
1506                         goto bail;
1507                 case IB_PMA_PORT_COUNTERS:
1508                         ret = recv_pma_set_portcounters(pmp, ibdev,
1509                                                         port_num);
1510                         goto bail;
1511                 case IB_PMA_PORT_COUNTERS_EXT:
1512                         ret = recv_pma_set_portcounters_ext(pmp, ibdev,
1513                                                             port_num);
1514                         goto bail;
1515                 default:
1516                         pmp->status |= IB_SMP_UNSUP_METH_ATTR;
1517                         ret = reply((struct ib_smp *) pmp);
1518                         goto bail;
1519                 }
1520
1521         case IB_MGMT_METHOD_GET_RESP:
1522                 /*
1523                  * The ib_mad module will call us to process responses
1524                  * before checking for other consumers.
1525                  * Just tell the caller to process it normally.
1526                  */
1527                 ret = IB_MAD_RESULT_FAILURE;
1528                 goto bail;
1529         default:
1530                 pmp->status |= IB_SMP_UNSUP_METHOD;
1531                 ret = reply((struct ib_smp *) pmp);
1532         }
1533
1534 bail:
1535         return ret;
1536 }
1537
1538 /**
1539  * ipath_process_mad - process an incoming MAD packet
1540  * @ibdev: the infiniband device this packet came in on
1541  * @mad_flags: MAD flags
1542  * @port_num: the port number this packet came in on
1543  * @in_wc: the work completion entry for this packet
1544  * @in_grh: the global route header for this packet
1545  * @in_mad: the incoming MAD
1546  * @out_mad: any outgoing MAD reply
1547  *
1548  * Returns IB_MAD_RESULT_SUCCESS if this is a MAD that we are not
1549  * interested in processing.
1550  *
1551  * Note that the verbs framework has already done the MAD sanity checks,
1552  * and hop count/pointer updating for IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
1553  * MADs.
1554  *
1555  * This is called by the ib_mad module.
1556  */
1557 int ipath_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
1558                       struct ib_wc *in_wc, struct ib_grh *in_grh,
1559                       struct ib_mad *in_mad, struct ib_mad *out_mad)
1560 {
1561         int ret;
1562
1563         switch (in_mad->mad_hdr.mgmt_class) {
1564         case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
1565         case IB_MGMT_CLASS_SUBN_LID_ROUTED:
1566                 ret = process_subn(ibdev, mad_flags, port_num,
1567                                    in_mad, out_mad);
1568                 goto bail;
1569         case IB_MGMT_CLASS_PERF_MGMT:
1570                 ret = process_perf(ibdev, port_num, in_mad, out_mad);
1571                 goto bail;
1572         default:
1573                 ret = IB_MAD_RESULT_SUCCESS;
1574         }
1575
1576 bail:
1577         return ret;
1578 }