git.oblomov.eu Git - linux-2.6/blob - drivers/infiniband/hw/ipath/ipath_mad.c

   1 /*
   2  * Copyright (c) 2006, 2007 QLogic Corporation. 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 = dd->ipath_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         /*
 296          * Note: the chips support a maximum MTU of 4096, but the driver
 297          * hasn't implemented this feature yet, so set the maximum value
 298          * to 2048.
 299          */
 300         pip->inittypereply_mtucap = IB_MTU_2048;
 301         // HCAs ignore VLStallCount and HOQLife
 302         /* pip->vlstallcnt_hoqlife; */
 303         pip->operationalvl_pei_peo_fpi_fpo = 0x10;      /* OVLs = 1 */
 304         pip->mkey_violations = cpu_to_be16(dev->mkey_violations);
 305         /* P_KeyViolations are counted by hardware. */
 306         pip->pkey_violations =
 307                 cpu_to_be16((ipath_get_cr_errpkey(dev->dd) -
 308                              dev->z_pkey_violations) & 0xFFFF);
 309         pip->qkey_violations = cpu_to_be16(dev->qkey_violations);
 310         /* Only the hardware GUID is supported for now */
 311         pip->guid_cap = 1;
 312         pip->clientrereg_resv_subnetto = dev->subnet_timeout;
 313         /* 32.768 usec. response time (guessing) */
 314         pip->resv_resptimevalue = 3;
 315         pip->localphyerrors_overrunerrors =
 316                 (get_phyerrthreshold(dev->dd) << 4) |
 317                 get_overrunthreshold(dev->dd);
 318         /* pip->max_credit_hint; */
 319         /* pip->link_roundtrip_latency[3]; */
 320
 321         ret = reply(smp);
 322
 323 bail:
 324         return ret;
 325 }
 326
 327 /**
 328  * get_pkeys - return the PKEY table for port 0
 329  * @dd: the infinipath device
 330  * @pkeys: the pkey table is placed here
 331  */
 332 static int get_pkeys(struct ipath_devdata *dd, u16 * pkeys)
 333 {
 334         struct ipath_portdata *pd = dd->ipath_pd[0];
 335
 336         memcpy(pkeys, pd->port_pkeys, sizeof(pd->port_pkeys));
 337
 338         return 0;
 339 }
 340
 341 static int recv_subn_get_pkeytable(struct ib_smp *smp,
 342                                    struct ib_device *ibdev)
 343 {
 344         u32 startpx = 32 * (be32_to_cpu(smp->attr_mod) & 0xffff);
 345         u16 *p = (u16 *) smp->data;
 346         __be16 *q = (__be16 *) smp->data;
 347
 348         /* 64 blocks of 32 16-bit P_Key entries */
 349
 350         memset(smp->data, 0, sizeof(smp->data));
 351         if (startpx == 0) {
 352                 struct ipath_ibdev *dev = to_idev(ibdev);
 353                 unsigned i, n = ipath_get_npkeys(dev->dd);
 354
 355                 get_pkeys(dev->dd, p);
 356
 357                 for (i = 0; i < n; i++)
 358                         q[i] = cpu_to_be16(p[i]);
 359         } else
 360                 smp->status |= IB_SMP_INVALID_FIELD;
 361
 362         return reply(smp);
 363 }
 364
 365 static int recv_subn_set_guidinfo(struct ib_smp *smp,
 366                                   struct ib_device *ibdev)
 367 {
 368         /* The only GUID we support is the first read-only entry. */
 369         return recv_subn_get_guidinfo(smp, ibdev);
 370 }
 371
 372 /**
 373  * set_linkdowndefaultstate - set the default linkdown state
 374  * @dd: the infinipath device
 375  * @sleep: the new state
 376  *
 377  * Note that this will only take effect when the link state changes.
 378  */
 379 static int set_linkdowndefaultstate(struct ipath_devdata *dd, int sleep)
 380 {
 381         if (sleep)
 382                 dd->ipath_ibcctrl |= INFINIPATH_IBCC_LINKDOWNDEFAULTSTATE;
 383         else
 384                 dd->ipath_ibcctrl &= ~INFINIPATH_IBCC_LINKDOWNDEFAULTSTATE;
 385         ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl,
 386                          dd->ipath_ibcctrl);
 387         return 0;
 388 }
 389
 390 /**
 391  * recv_subn_set_portinfo - set port information
 392  * @smp: the incoming SM packet
 393  * @ibdev: the infiniband device
 394  * @port: the port on the device
 395  *
 396  * Set Portinfo (see ch. 14.2.5.6).
 397  */
 398 static int recv_subn_set_portinfo(struct ib_smp *smp,
 399                                   struct ib_device *ibdev, u8 port)
 400 {
 401         struct ib_port_info *pip = (struct ib_port_info *)smp->data;
 402         struct ib_event event;
 403         struct ipath_ibdev *dev;
 404         u32 flags;
 405         char clientrereg = 0;
 406         u16 lid, smlid;
 407         u8 lwe;
 408         u8 lse;
 409         u8 state;
 410         u16 lstate;
 411         u32 mtu;
 412         int ret, ore;
 413
 414         if (be32_to_cpu(smp->attr_mod) > ibdev->phys_port_cnt)
 415                 goto err;
 416
 417         dev = to_idev(ibdev);
 418         event.device = ibdev;
 419         event.element.port_num = port;
 420
 421         dev->mkey = pip->mkey;
 422         dev->gid_prefix = pip->gid_prefix;
 423         dev->mkey_lease_period = be16_to_cpu(pip->mkey_lease_period);
 424
 425         lid = be16_to_cpu(pip->lid);
 426         if (lid != dev->dd->ipath_lid) {
 427                 /* Must be a valid unicast LID address. */
 428                 if (lid == 0 || lid >= IPATH_MULTICAST_LID_BASE)
 429                         goto err;
 430                 ipath_set_lid(dev->dd, lid, pip->mkeyprot_resv_lmc & 7);
 431                 event.event = IB_EVENT_LID_CHANGE;
 432                 ib_dispatch_event(&event);
 433         }
 434
 435         smlid = be16_to_cpu(pip->sm_lid);
 436         if (smlid != dev->sm_lid) {
 437                 /* Must be a valid unicast LID address. */
 438                 if (smlid == 0 || smlid >= IPATH_MULTICAST_LID_BASE)
 439                         goto err;
 440                 dev->sm_lid = smlid;
 441                 event.event = IB_EVENT_SM_CHANGE;
 442                 ib_dispatch_event(&event);
 443         }
 444
 445         /* Only 4x supported but allow 1x or 4x to be set (see 14.2.6.6). */
 446         lwe = pip->link_width_enabled;
 447         if ((lwe >= 4 && lwe <= 8) || (lwe >= 0xC && lwe <= 0xFE))
 448                 goto err;
 449         if (lwe == 0xFF)
 450                 dev->link_width_enabled = 3;    /* 1x or 4x */
 451         else if (lwe)
 452                 dev->link_width_enabled = lwe;
 453
 454         /* Only 2.5 Gbs supported. */
 455         lse = pip->linkspeedactive_enabled & 0xF;
 456         if (lse >= 2 && lse <= 0xE)
 457                 goto err;
 458
 459         /* Set link down default state. */
 460         switch (pip->portphysstate_linkdown & 0xF) {
 461         case 0: /* NOP */
 462                 break;
 463         case 1: /* SLEEP */
 464                 if (set_linkdowndefaultstate(dev->dd, 1))
 465                         goto err;
 466                 break;
 467         case 2: /* POLL */
 468                 if (set_linkdowndefaultstate(dev->dd, 0))
 469                         goto err;
 470                 break;
 471         default:
 472                 goto err;
 473         }
 474
 475         dev->mkeyprot_resv_lmc = pip->mkeyprot_resv_lmc;
 476         dev->vl_high_limit = pip->vl_high_limit;
 477
 478         switch ((pip->neighbormtu_mastersmsl >> 4) & 0xF) {
 479         case IB_MTU_256:
 480                 mtu = 256;
 481                 break;
 482         case IB_MTU_512:
 483                 mtu = 512;
 484                 break;
 485         case IB_MTU_1024:
 486                 mtu = 1024;
 487                 break;
 488         case IB_MTU_2048:
 489                 mtu = 2048;
 490                 break;
 491         case IB_MTU_4096:
 492                 mtu = 4096;
 493                 break;
 494         default:
 495                 /* XXX We have already partially updated our state! */
 496                 goto err;
 497         }
 498         ipath_set_mtu(dev->dd, mtu);
 499
 500         dev->sm_sl = pip->neighbormtu_mastersmsl & 0xF;
 501
 502         /* We only support VL0 */
 503         if (((pip->operationalvl_pei_peo_fpi_fpo >> 4) & 0xF) > 1)
 504                 goto err;
 505
 506         if (pip->mkey_violations == 0)
 507                 dev->mkey_violations = 0;
 508
 509         /*
 510          * Hardware counter can't be reset so snapshot and subtract
 511          * later.
 512          */
 513         if (pip->pkey_violations == 0)
 514                 dev->z_pkey_violations = ipath_get_cr_errpkey(dev->dd);
 515
 516         if (pip->qkey_violations == 0)
 517                 dev->qkey_violations = 0;
 518
 519         ore = pip->localphyerrors_overrunerrors;
 520         if (set_phyerrthreshold(dev->dd, (ore >> 4) & 0xF))
 521                 goto err;
 522
 523         if (set_overrunthreshold(dev->dd, (ore & 0xF)))
 524                 goto err;
 525
 526         dev->subnet_timeout = pip->clientrereg_resv_subnetto & 0x1F;
 527
 528         if (pip->clientrereg_resv_subnetto & 0x80) {
 529                 clientrereg = 1;
 530                 event.event = IB_EVENT_CLIENT_REREGISTER;
 531                 ib_dispatch_event(&event);
 532         }
 533
 534         /*
 535          * Do the port state change now that the other link parameters
 536          * have been set.
 537          * Changing the port physical state only makes sense if the link
 538          * is down or is being set to down.
 539          */
 540         state = pip->linkspeed_portstate & 0xF;
 541         flags = dev->dd->ipath_flags;
 542         lstate = (pip->portphysstate_linkdown >> 4) & 0xF;
 543         if (lstate && !(state == IB_PORT_DOWN || state == IB_PORT_NOP))
 544                 goto err;
 545
 546         /*
 547          * Only state changes of DOWN, ARM, and ACTIVE are valid
 548          * and must be in the correct state to take effect (see 7.2.6).
 549          */
 550         switch (state) {
 551         case IB_PORT_NOP:
 552                 if (lstate == 0)
 553                         break;
 554                 /* FALLTHROUGH */
 555         case IB_PORT_DOWN:
 556                 if (lstate == 0)
 557                         if (get_linkdowndefaultstate(dev->dd))
 558                                 lstate = IPATH_IB_LINKDOWN_SLEEP;
 559                         else
 560                                 lstate = IPATH_IB_LINKDOWN;
 561                 else if (lstate == 1)
 562                         lstate = IPATH_IB_LINKDOWN_SLEEP;
 563                 else if (lstate == 2)
 564                         lstate = IPATH_IB_LINKDOWN;
 565                 else if (lstate == 3)
 566                         lstate = IPATH_IB_LINKDOWN_DISABLE;
 567                 else
 568                         goto err;
 569                 ipath_set_linkstate(dev->dd, lstate);
 570                 if (flags & IPATH_LINKACTIVE) {
 571                         event.event = IB_EVENT_PORT_ERR;
 572                         ib_dispatch_event(&event);
 573                 }
 574                 break;
 575         case IB_PORT_ARMED:
 576                 if (!(flags & (IPATH_LINKINIT | IPATH_LINKACTIVE)))
 577                         break;
 578                 ipath_set_linkstate(dev->dd, IPATH_IB_LINKARM);
 579                 if (flags & IPATH_LINKACTIVE) {
 580                         event.event = IB_EVENT_PORT_ERR;
 581                         ib_dispatch_event(&event);
 582                 }
 583                 break;
 584         case IB_PORT_ACTIVE:
 585                 if (!(flags & IPATH_LINKARMED))
 586                         break;
 587                 ipath_set_linkstate(dev->dd, IPATH_IB_LINKACTIVE);
 588                 event.event = IB_EVENT_PORT_ACTIVE;
 589                 ib_dispatch_event(&event);
 590                 break;
 591         default:
 592                 /* XXX We have already partially updated our state! */
 593                 goto err;
 594         }
 595
 596         ret = recv_subn_get_portinfo(smp, ibdev, port);
 597
 598         if (clientrereg)
 599                 pip->clientrereg_resv_subnetto |= 0x80;
 600
 601         goto done;
 602
 603 err:
 604         smp->status |= IB_SMP_INVALID_FIELD;
 605         ret = recv_subn_get_portinfo(smp, ibdev, port);
 606
 607 done:
 608         return ret;
 609 }
 610
 611 /**
 612  * rm_pkey - decrecment the reference count for the given PKEY
 613  * @dd: the infinipath device
 614  * @key: the PKEY index
 615  *
 616  * Return true if this was the last reference and the hardware table entry
 617  * needs to be changed.
 618  */
 619 static int rm_pkey(struct ipath_devdata *dd, u16 key)
 620 {
 621         int i;
 622         int ret;
 623
 624         for (i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) {
 625                 if (dd->ipath_pkeys[i] != key)
 626                         continue;
 627                 if (atomic_dec_and_test(&dd->ipath_pkeyrefs[i])) {
 628                         dd->ipath_pkeys[i] = 0;
 629                         ret = 1;
 630                         goto bail;
 631                 }
 632                 break;
 633         }
 634
 635         ret = 0;
 636
 637 bail:
 638         return ret;
 639 }
 640
 641 /**
 642  * add_pkey - add the given PKEY to the hardware table
 643  * @dd: the infinipath device
 644  * @key: the PKEY
 645  *
 646  * Return an error code if unable to add the entry, zero if no change,
 647  * or 1 if the hardware PKEY register needs to be updated.
 648  */
 649 static int add_pkey(struct ipath_devdata *dd, u16 key)
 650 {
 651         int i;
 652         u16 lkey = key & 0x7FFF;
 653         int any = 0;
 654         int ret;
 655
 656         if (lkey == 0x7FFF) {
 657                 ret = 0;
 658                 goto bail;
 659         }
 660
 661         /* Look for an empty slot or a matching PKEY. */
 662         for (i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) {
 663                 if (!dd->ipath_pkeys[i]) {
 664                         any++;
 665                         continue;
 666                 }
 667                 /* If it matches exactly, try to increment the ref count */
 668                 if (dd->ipath_pkeys[i] == key) {
 669                         if (atomic_inc_return(&dd->ipath_pkeyrefs[i]) > 1) {
 670                                 ret = 0;
 671                                 goto bail;
 672                         }
 673                         /* Lost the race. Look for an empty slot below. */
 674                         atomic_dec(&dd->ipath_pkeyrefs[i]);
 675                         any++;
 676                 }
 677                 /*
 678                  * It makes no sense to have both the limited and unlimited
 679                  * PKEY set at the same time since the unlimited one will
 680                  * disable the limited one.
 681                  */
 682                 if ((dd->ipath_pkeys[i] & 0x7FFF) == lkey) {
 683                         ret = -EEXIST;
 684                         goto bail;
 685                 }
 686         }
 687         if (!any) {
 688                 ret = -EBUSY;
 689                 goto bail;
 690         }
 691         for (i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) {
 692                 if (!dd->ipath_pkeys[i] &&
 693                     atomic_inc_return(&dd->ipath_pkeyrefs[i]) == 1) {
 694                         /* for ipathstats, etc. */
 695                         ipath_stats.sps_pkeys[i] = lkey;
 696                         dd->ipath_pkeys[i] = key;
 697                         ret = 1;
 698                         goto bail;
 699                 }
 700         }
 701         ret = -EBUSY;
 702
 703 bail:
 704         return ret;
 705 }
 706
 707 /**
 708  * set_pkeys - set the PKEY table for port 0
 709  * @dd: the infinipath device
 710  * @pkeys: the PKEY table
 711  */
 712 static int set_pkeys(struct ipath_devdata *dd, u16 *pkeys)
 713 {
 714         struct ipath_portdata *pd;
 715         int i;
 716         int changed = 0;
 717
 718         pd = dd->ipath_pd[0];
 719
 720         for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) {
 721                 u16 key = pkeys[i];
 722                 u16 okey = pd->port_pkeys[i];
 723
 724                 if (key == okey)
 725                         continue;
 726                 /*
 727                  * The value of this PKEY table entry is changing.
 728                  * Remove the old entry in the hardware's array of PKEYs.
 729                  */
 730                 if (okey & 0x7FFF)
 731                         changed |= rm_pkey(dd, okey);
 732                 if (key & 0x7FFF) {
 733                         int ret = add_pkey(dd, key);
 734
 735                         if (ret < 0)
 736                                 key = 0;
 737                         else
 738                                 changed |= ret;
 739                 }
 740                 pd->port_pkeys[i] = key;
 741         }
 742         if (changed) {
 743                 u64 pkey;
 744
 745                 pkey = (u64) dd->ipath_pkeys[0] |
 746                         ((u64) dd->ipath_pkeys[1] << 16) |
 747                         ((u64) dd->ipath_pkeys[2] << 32) |
 748                         ((u64) dd->ipath_pkeys[3] << 48);
 749                 ipath_cdbg(VERBOSE, "p0 new pkey reg %llx\n",
 750                            (unsigned long long) pkey);
 751                 ipath_write_kreg(dd, dd->ipath_kregs->kr_partitionkey,
 752                                  pkey);
 753         }
 754         return 0;
 755 }
 756
 757 static int recv_subn_set_pkeytable(struct ib_smp *smp,
 758                                    struct ib_device *ibdev)
 759 {
 760         u32 startpx = 32 * (be32_to_cpu(smp->attr_mod) & 0xffff);
 761         __be16 *p = (__be16 *) smp->data;
 762         u16 *q = (u16 *) smp->data;
 763         struct ipath_ibdev *dev = to_idev(ibdev);
 764         unsigned i, n = ipath_get_npkeys(dev->dd);
 765
 766         for (i = 0; i < n; i++)
 767                 q[i] = be16_to_cpu(p[i]);
 768
 769         if (startpx != 0 || set_pkeys(dev->dd, q) != 0)
 770                 smp->status |= IB_SMP_INVALID_FIELD;
 771
 772         return recv_subn_get_pkeytable(smp, ibdev);
 773 }
 774
 775 #define IB_PMA_CLASS_PORT_INFO          __constant_htons(0x0001)
 776 #define IB_PMA_PORT_SAMPLES_CONTROL     __constant_htons(0x0010)
 777 #define IB_PMA_PORT_SAMPLES_RESULT      __constant_htons(0x0011)
 778 #define IB_PMA_PORT_COUNTERS            __constant_htons(0x0012)
 779 #define IB_PMA_PORT_COUNTERS_EXT        __constant_htons(0x001D)
 780 #define IB_PMA_PORT_SAMPLES_RESULT_EXT  __constant_htons(0x001E)
 781
 782 struct ib_perf {
 783         u8 base_version;
 784         u8 mgmt_class;
 785         u8 class_version;
 786         u8 method;
 787         __be16 status;
 788         __be16 unused;
 789         __be64 tid;
 790         __be16 attr_id;
 791         __be16 resv;
 792         __be32 attr_mod;
 793         u8 reserved[40];
 794         u8 data[192];
 795 } __attribute__ ((packed));
 796
 797 struct ib_pma_classportinfo {
 798         u8 base_version;
 799         u8 class_version;
 800         __be16 cap_mask;
 801         u8 reserved[3];
 802         u8 resp_time_value;     /* only lower 5 bits */
 803         union ib_gid redirect_gid;
 804         __be32 redirect_tc_sl_fl;       /* 8, 4, 20 bits respectively */
 805         __be16 redirect_lid;
 806         __be16 redirect_pkey;
 807         __be32 redirect_qp;     /* only lower 24 bits */
 808         __be32 redirect_qkey;
 809         union ib_gid trap_gid;
 810         __be32 trap_tc_sl_fl;   /* 8, 4, 20 bits respectively */
 811         __be16 trap_lid;
 812         __be16 trap_pkey;
 813         __be32 trap_hl_qp;      /* 8, 24 bits respectively */
 814         __be32 trap_qkey;
 815 } __attribute__ ((packed));
 816
 817 struct ib_pma_portsamplescontrol {
 818         u8 opcode;
 819         u8 port_select;
 820         u8 tick;
 821         u8 counter_width;       /* only lower 3 bits */
 822         __be32 counter_mask0_9; /* 2, 10 * 3, bits */
 823         __be16 counter_mask10_14;       /* 1, 5 * 3, bits */
 824         u8 sample_mechanisms;
 825         u8 sample_status;       /* only lower 2 bits */
 826         __be64 option_mask;
 827         __be64 vendor_mask;
 828         __be32 sample_start;
 829         __be32 sample_interval;
 830         __be16 tag;
 831         __be16 counter_select[15];
 832 } __attribute__ ((packed));
 833
 834 struct ib_pma_portsamplesresult {
 835         __be16 tag;
 836         __be16 sample_status;   /* only lower 2 bits */
 837         __be32 counter[15];
 838 } __attribute__ ((packed));
 839
 840 struct ib_pma_portsamplesresult_ext {
 841         __be16 tag;
 842         __be16 sample_status;   /* only lower 2 bits */
 843         __be32 extended_width;  /* only upper 2 bits */
 844         __be64 counter[15];
 845 } __attribute__ ((packed));
 846
 847 struct ib_pma_portcounters {
 848         u8 reserved;
 849         u8 port_select;
 850         __be16 counter_select;
 851         __be16 symbol_error_counter;
 852         u8 link_error_recovery_counter;
 853         u8 link_downed_counter;
 854         __be16 port_rcv_errors;
 855         __be16 port_rcv_remphys_errors;
 856         __be16 port_rcv_switch_relay_errors;
 857         __be16 port_xmit_discards;
 858         u8 port_xmit_constraint_errors;
 859         u8 port_rcv_constraint_errors;
 860         u8 reserved1;
 861         u8 lli_ebor_errors;     /* 4, 4, bits */
 862         __be16 reserved2;
 863         __be16 vl15_dropped;
 864         __be32 port_xmit_data;
 865         __be32 port_rcv_data;
 866         __be32 port_xmit_packets;
 867         __be32 port_rcv_packets;
 868 } __attribute__ ((packed));
 869
 870 #define IB_PMA_SEL_SYMBOL_ERROR                 __constant_htons(0x0001)
 871 #define IB_PMA_SEL_LINK_ERROR_RECOVERY          __constant_htons(0x0002)
 872 #define IB_PMA_SEL_LINK_DOWNED                  __constant_htons(0x0004)
 873 #define IB_PMA_SEL_PORT_RCV_ERRORS              __constant_htons(0x0008)
 874 #define IB_PMA_SEL_PORT_RCV_REMPHYS_ERRORS      __constant_htons(0x0010)
 875 #define IB_PMA_SEL_PORT_XMIT_DISCARDS           __constant_htons(0x0040)
 876 #define IB_PMA_SEL_LOCAL_LINK_INTEGRITY_ERRORS  __constant_htons(0x0200)
 877 #define IB_PMA_SEL_EXCESSIVE_BUFFER_OVERRUNS    __constant_htons(0x0400)
 878 #define IB_PMA_SEL_PORT_VL15_DROPPED            __constant_htons(0x0800)
 879 #define IB_PMA_SEL_PORT_XMIT_DATA               __constant_htons(0x1000)
 880 #define IB_PMA_SEL_PORT_RCV_DATA                __constant_htons(0x2000)
 881 #define IB_PMA_SEL_PORT_XMIT_PACKETS            __constant_htons(0x4000)
 882 #define IB_PMA_SEL_PORT_RCV_PACKETS             __constant_htons(0x8000)
 883
 884 struct ib_pma_portcounters_ext {
 885         u8 reserved;
 886         u8 port_select;
 887         __be16 counter_select;
 888         __be32 reserved1;
 889         __be64 port_xmit_data;
 890         __be64 port_rcv_data;
 891         __be64 port_xmit_packets;
 892         __be64 port_rcv_packets;
 893         __be64 port_unicast_xmit_packets;
 894         __be64 port_unicast_rcv_packets;
 895         __be64 port_multicast_xmit_packets;
 896         __be64 port_multicast_rcv_packets;
 897 } __attribute__ ((packed));
 898
 899 #define IB_PMA_SELX_PORT_XMIT_DATA              __constant_htons(0x0001)
 900 #define IB_PMA_SELX_PORT_RCV_DATA               __constant_htons(0x0002)
 901 #define IB_PMA_SELX_PORT_XMIT_PACKETS           __constant_htons(0x0004)
 902 #define IB_PMA_SELX_PORT_RCV_PACKETS            __constant_htons(0x0008)
 903 #define IB_PMA_SELX_PORT_UNI_XMIT_PACKETS       __constant_htons(0x0010)
 904 #define IB_PMA_SELX_PORT_UNI_RCV_PACKETS        __constant_htons(0x0020)
 905 #define IB_PMA_SELX_PORT_MULTI_XMIT_PACKETS     __constant_htons(0x0040)
 906 #define IB_PMA_SELX_PORT_MULTI_RCV_PACKETS      __constant_htons(0x0080)
 907
 908 static int recv_pma_get_classportinfo(struct ib_perf *pmp)
 909 {
 910         struct ib_pma_classportinfo *p =
 911                 (struct ib_pma_classportinfo *)pmp->data;
 912
 913         memset(pmp->data, 0, sizeof(pmp->data));
 914
 915         if (pmp->attr_mod != 0)
 916                 pmp->status |= IB_SMP_INVALID_FIELD;
 917
 918         /* Indicate AllPortSelect is valid (only one port anyway) */
 919         p->cap_mask = __constant_cpu_to_be16(1 << 8);
 920         p->base_version = 1;
 921         p->class_version = 1;
 922         /*
 923          * Expected response time is 4.096 usec. * 2^18 == 1.073741824
 924          * sec.
 925          */
 926         p->resp_time_value = 18;
 927
 928         return reply((struct ib_smp *) pmp);
 929 }
 930
 931 /*
 932  * The PortSamplesControl.CounterMasks field is an array of 3 bit fields
 933  * which specify the N'th counter's capabilities. See ch. 16.1.3.2.
 934  * We support 5 counters which only count the mandatory quantities.
 935  */
 936 #define COUNTER_MASK(q, n) (q << ((9 - n) * 3))
 937 #define COUNTER_MASK0_9 \
 938         __constant_cpu_to_be32(COUNTER_MASK(1, 0) | \
 939                                COUNTER_MASK(1, 1) | \
 940                                COUNTER_MASK(1, 2) | \
 941                                COUNTER_MASK(1, 3) | \
 942                                COUNTER_MASK(1, 4))
 943
 944 static int recv_pma_get_portsamplescontrol(struct ib_perf *pmp,
 945                                            struct ib_device *ibdev, u8 port)
 946 {
 947         struct ib_pma_portsamplescontrol *p =
 948                 (struct ib_pma_portsamplescontrol *)pmp->data;
 949         struct ipath_ibdev *dev = to_idev(ibdev);
 950         unsigned long flags;
 951         u8 port_select = p->port_select;
 952
 953         memset(pmp->data, 0, sizeof(pmp->data));
 954
 955         p->port_select = port_select;
 956         if (pmp->attr_mod != 0 ||
 957             (port_select != port && port_select != 0xFF))
 958                 pmp->status |= IB_SMP_INVALID_FIELD;
 959         /*
 960          * Ticks are 10x the link transfer period which for 2.5Gbs is 4
 961          * nsec.  0 == 4 nsec., 1 == 8 nsec., ..., 255 == 1020 nsec.  Sample
 962          * intervals are counted in ticks.  Since we use Linux timers, that
 963          * count in jiffies, we can't sample for less than 1000 ticks if HZ
 964          * == 1000 (4000 ticks if HZ is 250).
 965          */
 966         /* XXX This is WRONG. */
 967         p->tick = 250;          /* 1 usec. */
 968         p->counter_width = 4;   /* 32 bit counters */
 969         p->counter_mask0_9 = COUNTER_MASK0_9;
 970         spin_lock_irqsave(&dev->pending_lock, flags);
 971         p->sample_status = dev->pma_sample_status;
 972         p->sample_start = cpu_to_be32(dev->pma_sample_start);
 973         p->sample_interval = cpu_to_be32(dev->pma_sample_interval);
 974         p->tag = cpu_to_be16(dev->pma_tag);
 975         p->counter_select[0] = dev->pma_counter_select[0];
 976         p->counter_select[1] = dev->pma_counter_select[1];
 977         p->counter_select[2] = dev->pma_counter_select[2];
 978         p->counter_select[3] = dev->pma_counter_select[3];
 979         p->counter_select[4] = dev->pma_counter_select[4];
 980         spin_unlock_irqrestore(&dev->pending_lock, flags);
 981
 982         return reply((struct ib_smp *) pmp);
 983 }
 984
 985 static int recv_pma_set_portsamplescontrol(struct ib_perf *pmp,
 986                                            struct ib_device *ibdev, u8 port)
 987 {
 988         struct ib_pma_portsamplescontrol *p =
 989                 (struct ib_pma_portsamplescontrol *)pmp->data;
 990         struct ipath_ibdev *dev = to_idev(ibdev);
 991         unsigned long flags;
 992         u32 start;
 993         int ret;
 994
 995         if (pmp->attr_mod != 0 ||
 996             (p->port_select != port && p->port_select != 0xFF)) {
 997                 pmp->status |= IB_SMP_INVALID_FIELD;
 998                 ret = reply((struct ib_smp *) pmp);
 999                 goto bail;
1000         }
1001
1002         start = be32_to_cpu(p->sample_start);
1003         if (start != 0) {
1004                 spin_lock_irqsave(&dev->pending_lock, flags);
1005                 if (dev->pma_sample_status == IB_PMA_SAMPLE_STATUS_DONE) {
1006                         dev->pma_sample_status =
1007                                 IB_PMA_SAMPLE_STATUS_STARTED;
1008                         dev->pma_sample_start = start;
1009                         dev->pma_sample_interval =
1010                                 be32_to_cpu(p->sample_interval);
1011                         dev->pma_tag = be16_to_cpu(p->tag);
1012                         if (p->counter_select[0])
1013                                 dev->pma_counter_select[0] =
1014                                         p->counter_select[0];
1015                         if (p->counter_select[1])
1016                                 dev->pma_counter_select[1] =
1017                                         p->counter_select[1];
1018                         if (p->counter_select[2])
1019                                 dev->pma_counter_select[2] =
1020                                         p->counter_select[2];
1021                         if (p->counter_select[3])
1022                                 dev->pma_counter_select[3] =
1023                                         p->counter_select[3];
1024                         if (p->counter_select[4])
1025                                 dev->pma_counter_select[4] =
1026                                         p->counter_select[4];
1027                 }
1028                 spin_unlock_irqrestore(&dev->pending_lock, flags);
1029         }
1030         ret = recv_pma_get_portsamplescontrol(pmp, ibdev, port);
1031
1032 bail:
1033         return ret;
1034 }
1035
1036 static u64 get_counter(struct ipath_ibdev *dev, __be16 sel)
1037 {
1038         u64 ret;
1039
1040         switch (sel) {
1041         case IB_PMA_PORT_XMIT_DATA:
1042                 ret = dev->ipath_sword;
1043                 break;
1044         case IB_PMA_PORT_RCV_DATA:
1045                 ret = dev->ipath_rword;
1046                 break;
1047         case IB_PMA_PORT_XMIT_PKTS:
1048                 ret = dev->ipath_spkts;
1049                 break;
1050         case IB_PMA_PORT_RCV_PKTS:
1051                 ret = dev->ipath_rpkts;
1052                 break;
1053         case IB_PMA_PORT_XMIT_WAIT:
1054                 ret = dev->ipath_xmit_wait;
1055                 break;
1056         default:
1057                 ret = 0;
1058         }
1059
1060         return ret;
1061 }
1062
1063 static int recv_pma_get_portsamplesresult(struct ib_perf *pmp,
1064                                           struct ib_device *ibdev)
1065 {
1066         struct ib_pma_portsamplesresult *p =
1067                 (struct ib_pma_portsamplesresult *)pmp->data;
1068         struct ipath_ibdev *dev = to_idev(ibdev);
1069         int i;
1070
1071         memset(pmp->data, 0, sizeof(pmp->data));
1072         p->tag = cpu_to_be16(dev->pma_tag);
1073         p->sample_status = cpu_to_be16(dev->pma_sample_status);
1074         for (i = 0; i < ARRAY_SIZE(dev->pma_counter_select); i++)
1075                 p->counter[i] = cpu_to_be32(
1076                         get_counter(dev, dev->pma_counter_select[i]));
1077
1078         return reply((struct ib_smp *) pmp);
1079 }
1080
1081 static int recv_pma_get_portsamplesresult_ext(struct ib_perf *pmp,
1082                                               struct ib_device *ibdev)
1083 {
1084         struct ib_pma_portsamplesresult_ext *p =
1085                 (struct ib_pma_portsamplesresult_ext *)pmp->data;
1086         struct ipath_ibdev *dev = to_idev(ibdev);
1087         int i;
1088
1089         memset(pmp->data, 0, sizeof(pmp->data));
1090         p->tag = cpu_to_be16(dev->pma_tag);
1091         p->sample_status = cpu_to_be16(dev->pma_sample_status);
1092         /* 64 bits */
1093         p->extended_width = __constant_cpu_to_be32(0x80000000);
1094         for (i = 0; i < ARRAY_SIZE(dev->pma_counter_select); i++)
1095                 p->counter[i] = cpu_to_be64(
1096                         get_counter(dev, dev->pma_counter_select[i]));
1097
1098         return reply((struct ib_smp *) pmp);
1099 }
1100
1101 static int recv_pma_get_portcounters(struct ib_perf *pmp,
1102                                      struct ib_device *ibdev, u8 port)
1103 {
1104         struct ib_pma_portcounters *p = (struct ib_pma_portcounters *)
1105                 pmp->data;
1106         struct ipath_ibdev *dev = to_idev(ibdev);
1107         struct ipath_verbs_counters cntrs;
1108         u8 port_select = p->port_select;
1109
1110         ipath_get_counters(dev->dd, &cntrs);
1111
1112         /* Adjust counters for any resets done. */
1113         cntrs.symbol_error_counter -= dev->z_symbol_error_counter;
1114         cntrs.link_error_recovery_counter -=
1115                 dev->z_link_error_recovery_counter;
1116         cntrs.link_downed_counter -= dev->z_link_downed_counter;
1117         cntrs.port_rcv_errors += dev->rcv_errors;
1118         cntrs.port_rcv_errors -= dev->z_port_rcv_errors;
1119         cntrs.port_rcv_remphys_errors -= dev->z_port_rcv_remphys_errors;
1120         cntrs.port_xmit_discards -= dev->z_port_xmit_discards;
1121         cntrs.port_xmit_data -= dev->z_port_xmit_data;
1122         cntrs.port_rcv_data -= dev->z_port_rcv_data;
1123         cntrs.port_xmit_packets -= dev->z_port_xmit_packets;
1124         cntrs.port_rcv_packets -= dev->z_port_rcv_packets;
1125         cntrs.local_link_integrity_errors -=
1126                 dev->z_local_link_integrity_errors;
1127         cntrs.excessive_buffer_overrun_errors -=
1128                 dev->z_excessive_buffer_overrun_errors;
1129
1130         memset(pmp->data, 0, sizeof(pmp->data));
1131
1132         p->port_select = port_select;
1133         if (pmp->attr_mod != 0 ||
1134             (port_select != port && port_select != 0xFF))
1135                 pmp->status |= IB_SMP_INVALID_FIELD;
1136
1137         if (cntrs.symbol_error_counter > 0xFFFFUL)
1138                 p->symbol_error_counter = __constant_cpu_to_be16(0xFFFF);
1139         else
1140                 p->symbol_error_counter =
1141                         cpu_to_be16((u16)cntrs.symbol_error_counter);
1142         if (cntrs.link_error_recovery_counter > 0xFFUL)
1143                 p->link_error_recovery_counter = 0xFF;
1144         else
1145                 p->link_error_recovery_counter =
1146                         (u8)cntrs.link_error_recovery_counter;
1147         if (cntrs.link_downed_counter > 0xFFUL)
1148                 p->link_downed_counter = 0xFF;
1149         else
1150                 p->link_downed_counter = (u8)cntrs.link_downed_counter;
1151         if (cntrs.port_rcv_errors > 0xFFFFUL)
1152                 p->port_rcv_errors = __constant_cpu_to_be16(0xFFFF);
1153         else
1154                 p->port_rcv_errors =
1155                         cpu_to_be16((u16) cntrs.port_rcv_errors);
1156         if (cntrs.port_rcv_remphys_errors > 0xFFFFUL)
1157                 p->port_rcv_remphys_errors = __constant_cpu_to_be16(0xFFFF);
1158         else
1159                 p->port_rcv_remphys_errors =
1160                         cpu_to_be16((u16)cntrs.port_rcv_remphys_errors);
1161         if (cntrs.port_xmit_discards > 0xFFFFUL)
1162                 p->port_xmit_discards = __constant_cpu_to_be16(0xFFFF);
1163         else
1164                 p->port_xmit_discards =
1165                         cpu_to_be16((u16)cntrs.port_xmit_discards);
1166         if (cntrs.local_link_integrity_errors > 0xFUL)
1167                 cntrs.local_link_integrity_errors = 0xFUL;
1168         if (cntrs.excessive_buffer_overrun_errors > 0xFUL)
1169                 cntrs.excessive_buffer_overrun_errors = 0xFUL;
1170         p->lli_ebor_errors = (cntrs.local_link_integrity_errors << 4) |
1171                 cntrs.excessive_buffer_overrun_errors;
1172         if (dev->n_vl15_dropped > 0xFFFFUL)
1173                 p->vl15_dropped = __constant_cpu_to_be16(0xFFFF);
1174         else
1175                 p->vl15_dropped = cpu_to_be16((u16)dev->n_vl15_dropped);
1176         if (cntrs.port_xmit_data > 0xFFFFFFFFUL)
1177                 p->port_xmit_data = __constant_cpu_to_be32(0xFFFFFFFF);
1178         else
1179                 p->port_xmit_data = cpu_to_be32((u32)cntrs.port_xmit_data);
1180         if (cntrs.port_rcv_data > 0xFFFFFFFFUL)
1181                 p->port_rcv_data = __constant_cpu_to_be32(0xFFFFFFFF);
1182         else
1183                 p->port_rcv_data = cpu_to_be32((u32)cntrs.port_rcv_data);
1184         if (cntrs.port_xmit_packets > 0xFFFFFFFFUL)
1185                 p->port_xmit_packets = __constant_cpu_to_be32(0xFFFFFFFF);
1186         else
1187                 p->port_xmit_packets =
1188                         cpu_to_be32((u32)cntrs.port_xmit_packets);
1189         if (cntrs.port_rcv_packets > 0xFFFFFFFFUL)
1190                 p->port_rcv_packets = __constant_cpu_to_be32(0xFFFFFFFF);
1191         else
1192                 p->port_rcv_packets =
1193                         cpu_to_be32((u32) cntrs.port_rcv_packets);
1194
1195         return reply((struct ib_smp *) pmp);
1196 }
1197
1198 static int recv_pma_get_portcounters_ext(struct ib_perf *pmp,
1199                                          struct ib_device *ibdev, u8 port)
1200 {
1201         struct ib_pma_portcounters_ext *p =
1202                 (struct ib_pma_portcounters_ext *)pmp->data;
1203         struct ipath_ibdev *dev = to_idev(ibdev);
1204         u64 swords, rwords, spkts, rpkts, xwait;
1205         u8 port_select = p->port_select;
1206
1207         ipath_snapshot_counters(dev->dd, &swords, &rwords, &spkts,
1208                                 &rpkts, &xwait);
1209
1210         /* Adjust counters for any resets done. */
1211         swords -= dev->z_port_xmit_data;
1212         rwords -= dev->z_port_rcv_data;
1213         spkts -= dev->z_port_xmit_packets;
1214         rpkts -= dev->z_port_rcv_packets;
1215
1216         memset(pmp->data, 0, sizeof(pmp->data));
1217
1218         p->port_select = port_select;
1219         if (pmp->attr_mod != 0 ||
1220             (port_select != port && port_select != 0xFF))
1221                 pmp->status |= IB_SMP_INVALID_FIELD;
1222
1223         p->port_xmit_data = cpu_to_be64(swords);
1224         p->port_rcv_data = cpu_to_be64(rwords);
1225         p->port_xmit_packets = cpu_to_be64(spkts);
1226         p->port_rcv_packets = cpu_to_be64(rpkts);
1227         p->port_unicast_xmit_packets = cpu_to_be64(dev->n_unicast_xmit);
1228         p->port_unicast_rcv_packets = cpu_to_be64(dev->n_unicast_rcv);
1229         p->port_multicast_xmit_packets = cpu_to_be64(dev->n_multicast_xmit);
1230         p->port_multicast_rcv_packets = cpu_to_be64(dev->n_multicast_rcv);
1231
1232         return reply((struct ib_smp *) pmp);
1233 }
1234
1235 static int recv_pma_set_portcounters(struct ib_perf *pmp,
1236                                      struct ib_device *ibdev, u8 port)
1237 {
1238         struct ib_pma_portcounters *p = (struct ib_pma_portcounters *)
1239                 pmp->data;
1240         struct ipath_ibdev *dev = to_idev(ibdev);
1241         struct ipath_verbs_counters cntrs;
1242
1243         /*
1244          * Since the HW doesn't support clearing counters, we save the
1245          * current count and subtract it from future responses.
1246          */
1247         ipath_get_counters(dev->dd, &cntrs);
1248
1249         if (p->counter_select & IB_PMA_SEL_SYMBOL_ERROR)
1250                 dev->z_symbol_error_counter = cntrs.symbol_error_counter;
1251
1252         if (p->counter_select & IB_PMA_SEL_LINK_ERROR_RECOVERY)
1253                 dev->z_link_error_recovery_counter =
1254                         cntrs.link_error_recovery_counter;
1255
1256         if (p->counter_select & IB_PMA_SEL_LINK_DOWNED)
1257                 dev->z_link_downed_counter = cntrs.link_downed_counter;
1258
1259         if (p->counter_select & IB_PMA_SEL_PORT_RCV_ERRORS)
1260                 dev->z_port_rcv_errors =
1261                         cntrs.port_rcv_errors + dev->rcv_errors;
1262
1263         if (p->counter_select & IB_PMA_SEL_PORT_RCV_REMPHYS_ERRORS)
1264                 dev->z_port_rcv_remphys_errors =
1265                         cntrs.port_rcv_remphys_errors;
1266
1267         if (p->counter_select & IB_PMA_SEL_PORT_XMIT_DISCARDS)
1268                 dev->z_port_xmit_discards = cntrs.port_xmit_discards;
1269
1270         if (p->counter_select & IB_PMA_SEL_LOCAL_LINK_INTEGRITY_ERRORS)
1271                 dev->z_local_link_integrity_errors =
1272                         cntrs.local_link_integrity_errors;
1273
1274         if (p->counter_select & IB_PMA_SEL_EXCESSIVE_BUFFER_OVERRUNS)
1275                 dev->z_excessive_buffer_overrun_errors =
1276                         cntrs.excessive_buffer_overrun_errors;
1277
1278         if (p->counter_select & IB_PMA_SEL_PORT_VL15_DROPPED)
1279                 dev->n_vl15_dropped = 0;
1280
1281         if (p->counter_select & IB_PMA_SEL_PORT_XMIT_DATA)
1282                 dev->z_port_xmit_data = cntrs.port_xmit_data;
1283
1284         if (p->counter_select & IB_PMA_SEL_PORT_RCV_DATA)
1285                 dev->z_port_rcv_data = cntrs.port_rcv_data;
1286
1287         if (p->counter_select & IB_PMA_SEL_PORT_XMIT_PACKETS)
1288                 dev->z_port_xmit_packets = cntrs.port_xmit_packets;
1289
1290         if (p->counter_select & IB_PMA_SEL_PORT_RCV_PACKETS)
1291                 dev->z_port_rcv_packets = cntrs.port_rcv_packets;
1292
1293         return recv_pma_get_portcounters(pmp, ibdev, port);
1294 }
1295
1296 static int recv_pma_set_portcounters_ext(struct ib_perf *pmp,
1297                                          struct ib_device *ibdev, u8 port)
1298 {
1299         struct ib_pma_portcounters *p = (struct ib_pma_portcounters *)
1300                 pmp->data;
1301         struct ipath_ibdev *dev = to_idev(ibdev);
1302         u64 swords, rwords, spkts, rpkts, xwait;
1303
1304         ipath_snapshot_counters(dev->dd, &swords, &rwords, &spkts,
1305                                 &rpkts, &xwait);
1306
1307         if (p->counter_select & IB_PMA_SELX_PORT_XMIT_DATA)
1308                 dev->z_port_xmit_data = swords;
1309
1310         if (p->counter_select & IB_PMA_SELX_PORT_RCV_DATA)
1311                 dev->z_port_rcv_data = rwords;
1312
1313         if (p->counter_select & IB_PMA_SELX_PORT_XMIT_PACKETS)
1314                 dev->z_port_xmit_packets = spkts;
1315
1316         if (p->counter_select & IB_PMA_SELX_PORT_RCV_PACKETS)
1317                 dev->z_port_rcv_packets = rpkts;
1318
1319         if (p->counter_select & IB_PMA_SELX_PORT_UNI_XMIT_PACKETS)
1320                 dev->n_unicast_xmit = 0;
1321
1322         if (p->counter_select & IB_PMA_SELX_PORT_UNI_RCV_PACKETS)
1323                 dev->n_unicast_rcv = 0;
1324
1325         if (p->counter_select & IB_PMA_SELX_PORT_MULTI_XMIT_PACKETS)
1326                 dev->n_multicast_xmit = 0;
1327
1328         if (p->counter_select & IB_PMA_SELX_PORT_MULTI_RCV_PACKETS)
1329                 dev->n_multicast_rcv = 0;
1330
1331         return recv_pma_get_portcounters_ext(pmp, ibdev, port);
1332 }
1333
1334 static int process_subn(struct ib_device *ibdev, int mad_flags,
1335                         u8 port_num, struct ib_mad *in_mad,
1336                         struct ib_mad *out_mad)
1337 {
1338         struct ib_smp *smp = (struct ib_smp *)out_mad;
1339         struct ipath_ibdev *dev = to_idev(ibdev);
1340         int ret;
1341
1342         *out_mad = *in_mad;
1343         if (smp->class_version != 1) {
1344                 smp->status |= IB_SMP_UNSUP_VERSION;
1345                 ret = reply(smp);
1346                 goto bail;
1347         }
1348
1349         /* Is the mkey in the process of expiring? */
1350         if (dev->mkey_lease_timeout && jiffies >= dev->mkey_lease_timeout) {
1351                 /* Clear timeout and mkey protection field. */
1352                 dev->mkey_lease_timeout = 0;
1353                 dev->mkeyprot_resv_lmc &= 0x3F;
1354         }
1355
1356         /*
1357          * M_Key checking depends on
1358          * Portinfo:M_Key_protect_bits
1359          */
1360         if ((mad_flags & IB_MAD_IGNORE_MKEY) == 0 && dev->mkey != 0 &&
1361             dev->mkey != smp->mkey &&
1362             (smp->method == IB_MGMT_METHOD_SET ||
1363              (smp->method == IB_MGMT_METHOD_GET &&
1364               (dev->mkeyprot_resv_lmc >> 7) != 0))) {
1365                 if (dev->mkey_violations != 0xFFFF)
1366                         ++dev->mkey_violations;
1367                 if (dev->mkey_lease_timeout ||
1368                     dev->mkey_lease_period == 0) {
1369                         ret = IB_MAD_RESULT_SUCCESS |
1370                                 IB_MAD_RESULT_CONSUMED;
1371                         goto bail;
1372                 }
1373                 dev->mkey_lease_timeout = jiffies +
1374                         dev->mkey_lease_period * HZ;
1375                 /* Future: Generate a trap notice. */
1376                 ret = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
1377                 goto bail;
1378         } else if (dev->mkey_lease_timeout)
1379                 dev->mkey_lease_timeout = 0;
1380
1381         switch (smp->method) {
1382         case IB_MGMT_METHOD_GET:
1383                 switch (smp->attr_id) {
1384                 case IB_SMP_ATTR_NODE_DESC:
1385                         ret = recv_subn_get_nodedescription(smp, ibdev);
1386                         goto bail;
1387                 case IB_SMP_ATTR_NODE_INFO:
1388                         ret = recv_subn_get_nodeinfo(smp, ibdev, port_num);
1389                         goto bail;
1390                 case IB_SMP_ATTR_GUID_INFO:
1391                         ret = recv_subn_get_guidinfo(smp, ibdev);
1392                         goto bail;
1393                 case IB_SMP_ATTR_PORT_INFO:
1394                         ret = recv_subn_get_portinfo(smp, ibdev, port_num);
1395                         goto bail;
1396                 case IB_SMP_ATTR_PKEY_TABLE:
1397                         ret = recv_subn_get_pkeytable(smp, ibdev);
1398                         goto bail;
1399                 case IB_SMP_ATTR_SM_INFO:
1400                         if (dev->port_cap_flags & IB_PORT_SM_DISABLED) {
1401                                 ret = IB_MAD_RESULT_SUCCESS |
1402                                         IB_MAD_RESULT_CONSUMED;
1403                                 goto bail;
1404                         }
1405                         if (dev->port_cap_flags & IB_PORT_SM) {
1406                                 ret = IB_MAD_RESULT_SUCCESS;
1407                                 goto bail;
1408                         }
1409                         /* FALLTHROUGH */
1410                 default:
1411                         smp->status |= IB_SMP_UNSUP_METH_ATTR;
1412                         ret = reply(smp);
1413                         goto bail;
1414                 }
1415
1416         case IB_MGMT_METHOD_SET:
1417                 switch (smp->attr_id) {
1418                 case IB_SMP_ATTR_GUID_INFO:
1419                         ret = recv_subn_set_guidinfo(smp, ibdev);
1420                         goto bail;
1421                 case IB_SMP_ATTR_PORT_INFO:
1422                         ret = recv_subn_set_portinfo(smp, ibdev, port_num);
1423                         goto bail;
1424                 case IB_SMP_ATTR_PKEY_TABLE:
1425                         ret = recv_subn_set_pkeytable(smp, ibdev);
1426                         goto bail;
1427                 case IB_SMP_ATTR_SM_INFO:
1428                         if (dev->port_cap_flags & IB_PORT_SM_DISABLED) {
1429                                 ret = IB_MAD_RESULT_SUCCESS |
1430                                         IB_MAD_RESULT_CONSUMED;
1431                                 goto bail;
1432                         }
1433                         if (dev->port_cap_flags & IB_PORT_SM) {
1434                                 ret = IB_MAD_RESULT_SUCCESS;
1435                                 goto bail;
1436                         }
1437                         /* FALLTHROUGH */
1438                 default:
1439                         smp->status |= IB_SMP_UNSUP_METH_ATTR;
1440                         ret = reply(smp);
1441                         goto bail;
1442                 }
1443
1444         case IB_MGMT_METHOD_GET_RESP:
1445                 /*
1446                  * The ib_mad module will call us to process responses
1447                  * before checking for other consumers.
1448                  * Just tell the caller to process it normally.
1449                  */
1450                 ret = IB_MAD_RESULT_FAILURE;
1451                 goto bail;
1452         default:
1453                 smp->status |= IB_SMP_UNSUP_METHOD;
1454                 ret = reply(smp);
1455         }
1456
1457 bail:
1458         return ret;
1459 }
1460
1461 static int process_perf(struct ib_device *ibdev, u8 port_num,
1462                         struct ib_mad *in_mad,
1463                         struct ib_mad *out_mad)
1464 {
1465         struct ib_perf *pmp = (struct ib_perf *)out_mad;
1466         int ret;
1467
1468         *out_mad = *in_mad;
1469         if (pmp->class_version != 1) {
1470                 pmp->status |= IB_SMP_UNSUP_VERSION;
1471                 ret = reply((struct ib_smp *) pmp);
1472                 goto bail;
1473         }
1474
1475         switch (pmp->method) {
1476         case IB_MGMT_METHOD_GET:
1477                 switch (pmp->attr_id) {
1478                 case IB_PMA_CLASS_PORT_INFO:
1479                         ret = recv_pma_get_classportinfo(pmp);
1480                         goto bail;
1481                 case IB_PMA_PORT_SAMPLES_CONTROL:
1482                         ret = recv_pma_get_portsamplescontrol(pmp, ibdev,
1483                                                               port_num);
1484                         goto bail;
1485                 case IB_PMA_PORT_SAMPLES_RESULT:
1486                         ret = recv_pma_get_portsamplesresult(pmp, ibdev);
1487                         goto bail;
1488                 case IB_PMA_PORT_SAMPLES_RESULT_EXT:
1489                         ret = recv_pma_get_portsamplesresult_ext(pmp,
1490                                                                  ibdev);
1491                         goto bail;
1492                 case IB_PMA_PORT_COUNTERS:
1493                         ret = recv_pma_get_portcounters(pmp, ibdev,
1494                                                         port_num);
1495                         goto bail;
1496                 case IB_PMA_PORT_COUNTERS_EXT:
1497                         ret = recv_pma_get_portcounters_ext(pmp, ibdev,
1498                                                             port_num);
1499                         goto bail;
1500                 default:
1501                         pmp->status |= IB_SMP_UNSUP_METH_ATTR;
1502                         ret = reply((struct ib_smp *) pmp);
1503                         goto bail;
1504                 }
1505
1506         case IB_MGMT_METHOD_SET:
1507                 switch (pmp->attr_id) {
1508                 case IB_PMA_PORT_SAMPLES_CONTROL:
1509                         ret = recv_pma_set_portsamplescontrol(pmp, ibdev,
1510                                                               port_num);
1511                         goto bail;
1512                 case IB_PMA_PORT_COUNTERS:
1513                         ret = recv_pma_set_portcounters(pmp, ibdev,
1514                                                         port_num);
1515                         goto bail;
1516                 case IB_PMA_PORT_COUNTERS_EXT:
1517                         ret = recv_pma_set_portcounters_ext(pmp, ibdev,
1518                                                             port_num);
1519                         goto bail;
1520                 default:
1521                         pmp->status |= IB_SMP_UNSUP_METH_ATTR;
1522                         ret = reply((struct ib_smp *) pmp);
1523                         goto bail;
1524                 }
1525
1526         case IB_MGMT_METHOD_GET_RESP:
1527                 /*
1528                  * The ib_mad module will call us to process responses
1529                  * before checking for other consumers.
1530                  * Just tell the caller to process it normally.
1531                  */
1532                 ret = IB_MAD_RESULT_FAILURE;
1533                 goto bail;
1534         default:
1535                 pmp->status |= IB_SMP_UNSUP_METHOD;
1536                 ret = reply((struct ib_smp *) pmp);
1537         }
1538
1539 bail:
1540         return ret;
1541 }
1542
1543 /**
1544  * ipath_process_mad - process an incoming MAD packet
1545  * @ibdev: the infiniband device this packet came in on
1546  * @mad_flags: MAD flags
1547  * @port_num: the port number this packet came in on
1548  * @in_wc: the work completion entry for this packet
1549  * @in_grh: the global route header for this packet
1550  * @in_mad: the incoming MAD
1551  * @out_mad: any outgoing MAD reply
1552  *
1553  * Returns IB_MAD_RESULT_SUCCESS if this is a MAD that we are not
1554  * interested in processing.
1555  *
1556  * Note that the verbs framework has already done the MAD sanity checks,
1557  * and hop count/pointer updating for IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
1558  * MADs.
1559  *
1560  * This is called by the ib_mad module.
1561  */
1562 int ipath_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
1563                       struct ib_wc *in_wc, struct ib_grh *in_grh,
1564                       struct ib_mad *in_mad, struct ib_mad *out_mad)
1565 {
1566         int ret;
1567
1568         switch (in_mad->mad_hdr.mgmt_class) {
1569         case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
1570         case IB_MGMT_CLASS_SUBN_LID_ROUTED:
1571                 ret = process_subn(ibdev, mad_flags, port_num,
1572                                    in_mad, out_mad);
1573                 goto bail;
1574         case IB_MGMT_CLASS_PERF_MGMT:
1575                 ret = process_perf(ibdev, port_num, in_mad, out_mad);
1576                 goto bail;
1577         default:
1578                 ret = IB_MAD_RESULT_SUCCESS;
1579         }
1580
1581 bail:
1582         return ret;
1583 }