drivers/infiniband/hw/ipath/ipath_mad.c

   1 /*
   2  * Copyright (c) 2006, 2007, 2008 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] = IPATH_SRC_OUI_1;
 115         nip->vendor_id[1] = IPATH_SRC_OUI_2;
 116         nip->vendor_id[2] = IPATH_SRC_OUI_3;
 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 static void set_link_width_enabled(struct ipath_devdata *dd, u32 w)
 150 {
 151         (void) dd->ipath_f_set_ib_cfg(dd, IPATH_IB_CFG_LWID_ENB, w);
 152 }
 153
 154 static void set_link_speed_enabled(struct ipath_devdata *dd, u32 s)
 155 {
 156         (void) dd->ipath_f_set_ib_cfg(dd, IPATH_IB_CFG_SPD_ENB, s);
 157 }
 158
 159 static int get_overrunthreshold(struct ipath_devdata *dd)
 160 {
 161         return (dd->ipath_ibcctrl >>
 162                 INFINIPATH_IBCC_OVERRUNTHRESHOLD_SHIFT) &
 163                 INFINIPATH_IBCC_OVERRUNTHRESHOLD_MASK;
 164 }
 165
 166 /**
 167  * set_overrunthreshold - set the overrun threshold
 168  * @dd: the infinipath device
 169  * @n: the new threshold
 170  *
 171  * Note that this will only take effect when the link state changes.
 172  */
 173 static int set_overrunthreshold(struct ipath_devdata *dd, unsigned n)
 174 {
 175         unsigned v;
 176
 177         v = (dd->ipath_ibcctrl >> INFINIPATH_IBCC_OVERRUNTHRESHOLD_SHIFT) &
 178                 INFINIPATH_IBCC_OVERRUNTHRESHOLD_MASK;
 179         if (v != n) {
 180                 dd->ipath_ibcctrl &=
 181                         ~(INFINIPATH_IBCC_OVERRUNTHRESHOLD_MASK <<
 182                           INFINIPATH_IBCC_OVERRUNTHRESHOLD_SHIFT);
 183                 dd->ipath_ibcctrl |=
 184                         (u64) n << INFINIPATH_IBCC_OVERRUNTHRESHOLD_SHIFT;
 185                 ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl,
 186                                  dd->ipath_ibcctrl);
 187         }
 188         return 0;
 189 }
 190
 191 static int get_phyerrthreshold(struct ipath_devdata *dd)
 192 {
 193         return (dd->ipath_ibcctrl >>
 194                 INFINIPATH_IBCC_PHYERRTHRESHOLD_SHIFT) &
 195                 INFINIPATH_IBCC_PHYERRTHRESHOLD_MASK;
 196 }
 197
 198 /**
 199  * set_phyerrthreshold - set the physical error threshold
 200  * @dd: the infinipath device
 201  * @n: the new threshold
 202  *
 203  * Note that this will only take effect when the link state changes.
 204  */
 205 static int set_phyerrthreshold(struct ipath_devdata *dd, unsigned n)
 206 {
 207         unsigned v;
 208
 209         v = (dd->ipath_ibcctrl >> INFINIPATH_IBCC_PHYERRTHRESHOLD_SHIFT) &
 210                 INFINIPATH_IBCC_PHYERRTHRESHOLD_MASK;
 211         if (v != n) {
 212                 dd->ipath_ibcctrl &=
 213                         ~(INFINIPATH_IBCC_PHYERRTHRESHOLD_MASK <<
 214                           INFINIPATH_IBCC_PHYERRTHRESHOLD_SHIFT);
 215                 dd->ipath_ibcctrl |=
 216                         (u64) n << INFINIPATH_IBCC_PHYERRTHRESHOLD_SHIFT;
 217                 ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl,
 218                                  dd->ipath_ibcctrl);
 219         }
 220         return 0;
 221 }
 222
 223 /**
 224  * get_linkdowndefaultstate - get the default linkdown state
 225  * @dd: the infinipath device
 226  *
 227  * Returns zero if the default is POLL, 1 if the default is SLEEP.
 228  */
 229 static int get_linkdowndefaultstate(struct ipath_devdata *dd)
 230 {
 231         return !!(dd->ipath_ibcctrl & INFINIPATH_IBCC_LINKDOWNDEFAULTSTATE);
 232 }
 233
 234 static int recv_subn_get_portinfo(struct ib_smp *smp,
 235                                   struct ib_device *ibdev, u8 port)
 236 {
 237         struct ipath_ibdev *dev;
 238         struct ipath_devdata *dd;
 239         struct ib_port_info *pip = (struct ib_port_info *)smp->data;
 240         u16 lid;
 241         u8 ibcstat;
 242         u8 mtu;
 243         int ret;
 244
 245         if (be32_to_cpu(smp->attr_mod) > ibdev->phys_port_cnt) {
 246                 smp->status |= IB_SMP_INVALID_FIELD;
 247                 ret = reply(smp);
 248                 goto bail;
 249         }
 250
 251         dev = to_idev(ibdev);
 252         dd = dev->dd;
 253
 254         /* Clear all fields.  Only set the non-zero fields. */
 255         memset(smp->data, 0, sizeof(smp->data));
 256
 257         /* Only return the mkey if the protection field allows it. */
 258         if (smp->method == IB_MGMT_METHOD_SET || dev->mkey == smp->mkey ||
 259             dev->mkeyprot == 0)
 260                 pip->mkey = dev->mkey;
 261         pip->gid_prefix = dev->gid_prefix;
 262         lid = dd->ipath_lid;
 263         pip->lid = lid ? cpu_to_be16(lid) : IB_LID_PERMISSIVE;
 264         pip->sm_lid = cpu_to_be16(dev->sm_lid);
 265         pip->cap_mask = cpu_to_be32(dev->port_cap_flags);
 266         /* pip->diag_code; */
 267         pip->mkey_lease_period = cpu_to_be16(dev->mkey_lease_period);
 268         pip->local_port_num = port;
 269         pip->link_width_enabled = dd->ipath_link_width_enabled;
 270         pip->link_width_supported = dd->ipath_link_width_supported;
 271         pip->link_width_active = dd->ipath_link_width_active;
 272         pip->linkspeed_portstate = dd->ipath_link_speed_supported << 4;
 273         ibcstat = dd->ipath_lastibcstat;
 274         /* map LinkState to IB portinfo values.  */
 275         pip->linkspeed_portstate |= ipath_ib_linkstate(dd, ibcstat) + 1;
 276
 277         pip->portphysstate_linkdown =
 278                 (ipath_cvt_physportstate[ibcstat & dd->ibcs_lts_mask] << 4) |
 279                 (get_linkdowndefaultstate(dd) ? 1 : 2);
 280         pip->mkeyprot_resv_lmc = (dev->mkeyprot << 6) | dd->ipath_lmc;
 281         pip->linkspeedactive_enabled = (dd->ipath_link_speed_active << 4) |
 282                 dd->ipath_link_speed_enabled;
 283         switch (dd->ipath_ibmtu) {
 284         case 4096:
 285                 mtu = IB_MTU_4096;
 286                 break;
 287         case 2048:
 288                 mtu = IB_MTU_2048;
 289                 break;
 290         case 1024:
 291                 mtu = IB_MTU_1024;
 292                 break;
 293         case 512:
 294                 mtu = IB_MTU_512;
 295                 break;
 296         case 256:
 297                 mtu = IB_MTU_256;
 298                 break;
 299         default:                /* oops, something is wrong */
 300                 mtu = IB_MTU_2048;
 301                 break;
 302         }
 303         pip->neighbormtu_mastersmsl = (mtu << 4) | dev->sm_sl;
 304         pip->vlcap_inittype = 0x10;     /* VLCap = VL0, InitType = 0 */
 305         pip->vl_high_limit = dev->vl_high_limit;
 306         /* pip->vl_arb_high_cap; // only one VL */
 307         /* pip->vl_arb_low_cap; // only one VL */
 308         /* InitTypeReply = 0 */
 309         /* our mtu cap depends on whether 4K MTU enabled or not */
 310         pip->inittypereply_mtucap = ipath_mtu4096 ? IB_MTU_4096 : IB_MTU_2048;
 311         /* HCAs ignore VLStallCount and HOQLife */
 312         /* pip->vlstallcnt_hoqlife; */
 313         pip->operationalvl_pei_peo_fpi_fpo = 0x10;      /* OVLs = 1 */
 314         pip->mkey_violations = cpu_to_be16(dev->mkey_violations);
 315         /* P_KeyViolations are counted by hardware. */
 316         pip->pkey_violations =
 317                 cpu_to_be16((ipath_get_cr_errpkey(dd) -
 318                              dev->z_pkey_violations) & 0xFFFF);
 319         pip->qkey_violations = cpu_to_be16(dev->qkey_violations);
 320         /* Only the hardware GUID is supported for now */
 321         pip->guid_cap = 1;
 322         pip->clientrereg_resv_subnetto = dev->subnet_timeout;
 323         /* 32.768 usec. response time (guessing) */
 324         pip->resv_resptimevalue = 3;
 325         pip->localphyerrors_overrunerrors =
 326                 (get_phyerrthreshold(dd) << 4) |
 327                 get_overrunthreshold(dd);
 328         /* pip->max_credit_hint; */
 329         if (dev->port_cap_flags & IB_PORT_LINK_LATENCY_SUP) {
 330                 u32 v;
 331
 332                 v = dd->ipath_f_get_ib_cfg(dd, IPATH_IB_CFG_LINKLATENCY);
 333                 pip->link_roundtrip_latency[0] = v >> 16;
 334                 pip->link_roundtrip_latency[1] = v >> 8;
 335                 pip->link_roundtrip_latency[2] = v;
 336         }
 337
 338         ret = reply(smp);
 339
 340 bail:
 341         return ret;
 342 }
 343
 344 /**
 345  * get_pkeys - return the PKEY table for port 0
 346  * @dd: the infinipath device
 347  * @pkeys: the pkey table is placed here
 348  */
 349 static int get_pkeys(struct ipath_devdata *dd, u16 * pkeys)
 350 {
 351         /* always a kernel port, no locking needed */
 352         struct ipath_portdata *pd = dd->ipath_pd[0];
 353
 354         memcpy(pkeys, pd->port_pkeys, sizeof(pd->port_pkeys));
 355
 356         return 0;
 357 }
 358
 359 static int recv_subn_get_pkeytable(struct ib_smp *smp,
 360                                    struct ib_device *ibdev)
 361 {
 362         u32 startpx = 32 * (be32_to_cpu(smp->attr_mod) & 0xffff);
 363         u16 *p = (u16 *) smp->data;
 364         __be16 *q = (__be16 *) smp->data;
 365
 366         /* 64 blocks of 32 16-bit P_Key entries */
 367
 368         memset(smp->data, 0, sizeof(smp->data));
 369         if (startpx == 0) {
 370                 struct ipath_ibdev *dev = to_idev(ibdev);
 371                 unsigned i, n = ipath_get_npkeys(dev->dd);
 372
 373                 get_pkeys(dev->dd, p);
 374
 375                 for (i = 0; i < n; i++)
 376                         q[i] = cpu_to_be16(p[i]);
 377         } else
 378                 smp->status |= IB_SMP_INVALID_FIELD;
 379
 380         return reply(smp);
 381 }
 382
 383 static int recv_subn_set_guidinfo(struct ib_smp *smp,
 384                                   struct ib_device *ibdev)
 385 {
 386         /* The only GUID we support is the first read-only entry. */
 387         return recv_subn_get_guidinfo(smp, ibdev);
 388 }
 389
 390 /**
 391  * set_linkdowndefaultstate - set the default linkdown state
 392  * @dd: the infinipath device
 393  * @sleep: the new state
 394  *
 395  * Note that this will only take effect when the link state changes.
 396  */
 397 static int set_linkdowndefaultstate(struct ipath_devdata *dd, int sleep)
 398 {
 399         if (sleep)
 400                 dd->ipath_ibcctrl |= INFINIPATH_IBCC_LINKDOWNDEFAULTSTATE;
 401         else
 402                 dd->ipath_ibcctrl &= ~INFINIPATH_IBCC_LINKDOWNDEFAULTSTATE;
 403         ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl,
 404                          dd->ipath_ibcctrl);
 405         return 0;
 406 }
 407
 408 /**
 409  * recv_subn_set_portinfo - set port information
 410  * @smp: the incoming SM packet
 411  * @ibdev: the infiniband device
 412  * @port: the port on the device
 413  *
 414  * Set Portinfo (see ch. 14.2.5.6).
 415  */
 416 static int recv_subn_set_portinfo(struct ib_smp *smp,
 417                                   struct ib_device *ibdev, u8 port)
 418 {
 419         struct ib_port_info *pip = (struct ib_port_info *)smp->data;
 420         struct ib_event event;
 421         struct ipath_ibdev *dev;
 422         struct ipath_devdata *dd;
 423         char clientrereg = 0;
 424         u16 lid, smlid;
 425         u8 lwe;
 426         u8 lse;
 427         u8 state;
 428         u16 lstate;
 429         u32 mtu;
 430         int ret, ore;
 431
 432         if (be32_to_cpu(smp->attr_mod) > ibdev->phys_port_cnt)
 433                 goto err;
 434
 435         dev = to_idev(ibdev);
 436         dd = dev->dd;
 437         event.device = ibdev;
 438         event.element.port_num = port;
 439
 440         dev->mkey = pip->mkey;
 441         dev->gid_prefix = pip->gid_prefix;
 442         dev->mkey_lease_period = be16_to_cpu(pip->mkey_lease_period);
 443
 444         lid = be16_to_cpu(pip->lid);
 445         if (dd->ipath_lid != lid ||
 446             dd->ipath_lmc != (pip->mkeyprot_resv_lmc & 7)) {
 447                 /* Must be a valid unicast LID address. */
 448                 if (lid == 0 || lid >= IPATH_MULTICAST_LID_BASE)
 449                         goto err;
 450                 ipath_set_lid(dd, lid, pip->mkeyprot_resv_lmc & 7);
 451                 event.event = IB_EVENT_LID_CHANGE;
 452                 ib_dispatch_event(&event);
 453         }
 454
 455         smlid = be16_to_cpu(pip->sm_lid);
 456         if (smlid != dev->sm_lid) {
 457                 /* Must be a valid unicast LID address. */
 458                 if (smlid == 0 || smlid >= IPATH_MULTICAST_LID_BASE)
 459                         goto err;
 460                 dev->sm_lid = smlid;
 461                 event.event = IB_EVENT_SM_CHANGE;
 462                 ib_dispatch_event(&event);
 463         }
 464
 465         /* Allow 1x or 4x to be set (see 14.2.6.6). */
 466         lwe = pip->link_width_enabled;
 467         if (lwe) {
 468                 if (lwe == 0xFF)
 469                         lwe = dd->ipath_link_width_supported;
 470                 else if (lwe >= 16 || (lwe & ~dd->ipath_link_width_supported))
 471                         goto err;
 472                 set_link_width_enabled(dd, lwe);
 473         }
 474
 475         /* Allow 2.5 or 5.0 Gbs. */
 476         lse = pip->linkspeedactive_enabled & 0xF;
 477         if (lse) {
 478                 if (lse == 15)
 479                         lse = dd->ipath_link_speed_supported;
 480                 else if (lse >= 8 || (lse & ~dd->ipath_link_speed_supported))
 481                         goto err;
 482                 set_link_speed_enabled(dd, lse);
 483         }
 484
 485         /* Set link down default state. */
 486         switch (pip->portphysstate_linkdown & 0xF) {
 487         case 0: /* NOP */
 488                 break;
 489         case 1: /* SLEEP */
 490                 if (set_linkdowndefaultstate(dd, 1))
 491                         goto err;
 492                 break;
 493         case 2: /* POLL */
 494                 if (set_linkdowndefaultstate(dd, 0))
 495                         goto err;
 496                 break;
 497         default:
 498                 goto err;
 499         }
 500
 501         dev->mkeyprot = pip->mkeyprot_resv_lmc >> 6;
 502         dev->vl_high_limit = pip->vl_high_limit;
 503
 504         switch ((pip->neighbormtu_mastersmsl >> 4) & 0xF) {
 505         case IB_MTU_256:
 506                 mtu = 256;
 507                 break;
 508         case IB_MTU_512:
 509                 mtu = 512;
 510                 break;
 511         case IB_MTU_1024:
 512                 mtu = 1024;
 513                 break;
 514         case IB_MTU_2048:
 515                 mtu = 2048;
 516                 break;
 517         case IB_MTU_4096:
 518                 if (!ipath_mtu4096)
 519                         goto err;
 520                 mtu = 4096;
 521                 break;
 522         default:
 523                 /* XXX We have already partially updated our state! */
 524                 goto err;
 525         }
 526         ipath_set_mtu(dd, mtu);
 527
 528         dev->sm_sl = pip->neighbormtu_mastersmsl & 0xF;
 529
 530         /* We only support VL0 */
 531         if (((pip->operationalvl_pei_peo_fpi_fpo >> 4) & 0xF) > 1)
 532                 goto err;
 533
 534         if (pip->mkey_violations == 0)
 535                 dev->mkey_violations = 0;
 536
 537         /*
 538          * Hardware counter can't be reset so snapshot and subtract
 539          * later.
 540          */
 541         if (pip->pkey_violations == 0)
 542                 dev->z_pkey_violations = ipath_get_cr_errpkey(dd);
 543
 544         if (pip->qkey_violations == 0)
 545                 dev->qkey_violations = 0;
 546
 547         ore = pip->localphyerrors_overrunerrors;
 548         if (set_phyerrthreshold(dd, (ore >> 4) & 0xF))
 549                 goto err;
 550
 551         if (set_overrunthreshold(dd, (ore & 0xF)))
 552                 goto err;
 553
 554         dev->subnet_timeout = pip->clientrereg_resv_subnetto & 0x1F;
 555
 556         if (pip->clientrereg_resv_subnetto & 0x80) {
 557                 clientrereg = 1;
 558                 event.event = IB_EVENT_CLIENT_REREGISTER;
 559                 ib_dispatch_event(&event);
 560         }
 561
 562         /*
 563          * Do the port state change now that the other link parameters
 564          * have been set.
 565          * Changing the port physical state only makes sense if the link
 566          * is down or is being set to down.
 567          */
 568         state = pip->linkspeed_portstate & 0xF;
 569         lstate = (pip->portphysstate_linkdown >> 4) & 0xF;
 570         if (lstate && !(state == IB_PORT_DOWN || state == IB_PORT_NOP))
 571                 goto err;
 572
 573         /*
 574          * Only state changes of DOWN, ARM, and ACTIVE are valid
 575          * and must be in the correct state to take effect (see 7.2.6).
 576          */
 577         switch (state) {
 578         case IB_PORT_NOP:
 579                 if (lstate == 0)
 580                         break;
 581                 /* FALLTHROUGH */
 582         case IB_PORT_DOWN:
 583                 if (lstate == 0)
 584                         lstate = IPATH_IB_LINKDOWN_ONLY;
 585                 else if (lstate == 1)
 586                         lstate = IPATH_IB_LINKDOWN_SLEEP;
 587                 else if (lstate == 2)
 588                         lstate = IPATH_IB_LINKDOWN;
 589                 else if (lstate == 3)
 590                         lstate = IPATH_IB_LINKDOWN_DISABLE;
 591                 else
 592                         goto err;
 593                 ipath_set_linkstate(dd, lstate);
 594                 if (lstate == IPATH_IB_LINKDOWN_DISABLE) {
 595                         ret = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
 596                         goto done;
 597                 }
 598                 ipath_wait_linkstate(dd, IPATH_LINKINIT | IPATH_LINKARMED |
 599                                 IPATH_LINKACTIVE, 1000);
 600                 break;
 601         case IB_PORT_ARMED:
 602                 ipath_set_linkstate(dd, IPATH_IB_LINKARM);
 603                 break;
 604         case IB_PORT_ACTIVE:
 605                 ipath_set_linkstate(dd, IPATH_IB_LINKACTIVE);
 606                 break;
 607         default:
 608                 /* XXX We have already partially updated our state! */
 609                 goto err;
 610         }
 611
 612         ret = recv_subn_get_portinfo(smp, ibdev, port);
 613
 614         if (clientrereg)
 615                 pip->clientrereg_resv_subnetto |= 0x80;
 616
 617         goto done;
 618
 619 err:
 620         smp->status |= IB_SMP_INVALID_FIELD;
 621         ret = recv_subn_get_portinfo(smp, ibdev, port);
 622
 623 done:
 624         return ret;
 625 }
 626
 627 /**
 628  * rm_pkey - decrecment the reference count for the given PKEY
 629  * @dd: the infinipath device
 630  * @key: the PKEY index
 631  *
 632  * Return true if this was the last reference and the hardware table entry
 633  * needs to be changed.
 634  */
 635 static int rm_pkey(struct ipath_devdata *dd, u16 key)
 636 {
 637         int i;
 638         int ret;
 639
 640         for (i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) {
 641                 if (dd->ipath_pkeys[i] != key)
 642                         continue;
 643                 if (atomic_dec_and_test(&dd->ipath_pkeyrefs[i])) {
 644                         dd->ipath_pkeys[i] = 0;
 645                         ret = 1;
 646                         goto bail;
 647                 }
 648                 break;
 649         }
 650
 651         ret = 0;
 652
 653 bail:
 654         return ret;
 655 }
 656
 657 /**
 658  * add_pkey - add the given PKEY to the hardware table
 659  * @dd: the infinipath device
 660  * @key: the PKEY
 661  *
 662  * Return an error code if unable to add the entry, zero if no change,
 663  * or 1 if the hardware PKEY register needs to be updated.
 664  */
 665 static int add_pkey(struct ipath_devdata *dd, u16 key)
 666 {
 667         int i;
 668         u16 lkey = key & 0x7FFF;
 669         int any = 0;
 670         int ret;
 671
 672         if (lkey == 0x7FFF) {
 673                 ret = 0;
 674                 goto bail;
 675         }
 676
 677         /* Look for an empty slot or a matching PKEY. */
 678         for (i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) {
 679                 if (!dd->ipath_pkeys[i]) {
 680                         any++;
 681                         continue;
 682                 }
 683                 /* If it matches exactly, try to increment the ref count */
 684                 if (dd->ipath_pkeys[i] == key) {
 685                         if (atomic_inc_return(&dd->ipath_pkeyrefs[i]) > 1) {
 686                                 ret = 0;
 687                                 goto bail;
 688                         }
 689                         /* Lost the race. Look for an empty slot below. */
 690                         atomic_dec(&dd->ipath_pkeyrefs[i]);
 691                         any++;
 692                 }
 693                 /*
 694                  * It makes no sense to have both the limited and unlimited
 695                  * PKEY set at the same time since the unlimited one will
 696                  * disable the limited one.
 697                  */
 698                 if ((dd->ipath_pkeys[i] & 0x7FFF) == lkey) {
 699                         ret = -EEXIST;
 700                         goto bail;
 701                 }
 702         }
 703         if (!any) {
 704                 ret = -EBUSY;
 705                 goto bail;
 706         }
 707         for (i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) {
 708                 if (!dd->ipath_pkeys[i] &&
 709                     atomic_inc_return(&dd->ipath_pkeyrefs[i]) == 1) {
 710                         /* for ipathstats, etc. */
 711                         ipath_stats.sps_pkeys[i] = lkey;
 712                         dd->ipath_pkeys[i] = key;
 713                         ret = 1;
 714                         goto bail;
 715                 }
 716         }
 717         ret = -EBUSY;
 718
 719 bail:
 720         return ret;
 721 }
 722
 723 /**
 724  * set_pkeys - set the PKEY table for port 0
 725  * @dd: the infinipath device
 726  * @pkeys: the PKEY table
 727  */
 728 static int set_pkeys(struct ipath_devdata *dd, u16 *pkeys)
 729 {
 730         struct ipath_portdata *pd;
 731         int i;
 732         int changed = 0;
 733
 734         /* always a kernel port, no locking needed */
 735         pd = dd->ipath_pd[0];
 736
 737         for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) {
 738                 u16 key = pkeys[i];
 739                 u16 okey = pd->port_pkeys[i];
 740
 741                 if (key == okey)
 742                         continue;
 743                 /*
 744                  * The value of this PKEY table entry is changing.
 745                  * Remove the old entry in the hardware's array of PKEYs.
 746                  */
 747                 if (okey & 0x7FFF)
 748                         changed |= rm_pkey(dd, okey);
 749                 if (key & 0x7FFF) {
 750                         int ret = add_pkey(dd, key);
 751
 752                         if (ret < 0)
 753                                 key = 0;
 754                         else
 755                                 changed |= ret;
 756                 }
 757                 pd->port_pkeys[i] = key;
 758         }
 759         if (changed) {
 760                 u64 pkey;
 761
 762                 pkey = (u64) dd->ipath_pkeys[0] |
 763                         ((u64) dd->ipath_pkeys[1] << 16) |
 764                         ((u64) dd->ipath_pkeys[2] << 32) |
 765                         ((u64) dd->ipath_pkeys[3] << 48);
 766                 ipath_cdbg(VERBOSE, "p0 new pkey reg %llx\n",
 767                            (unsigned long long) pkey);
 768                 ipath_write_kreg(dd, dd->ipath_kregs->kr_partitionkey,
 769                                  pkey);
 770         }
 771         return 0;
 772 }
 773
 774 static int recv_subn_set_pkeytable(struct ib_smp *smp,
 775                                    struct ib_device *ibdev)
 776 {
 777         u32 startpx = 32 * (be32_to_cpu(smp->attr_mod) & 0xffff);
 778         __be16 *p = (__be16 *) smp->data;
 779         u16 *q = (u16 *) smp->data;
 780         struct ipath_ibdev *dev = to_idev(ibdev);
 781         unsigned i, n = ipath_get_npkeys(dev->dd);
 782
 783         for (i = 0; i < n; i++)
 784                 q[i] = be16_to_cpu(p[i]);
 785
 786         if (startpx != 0 || set_pkeys(dev->dd, q) != 0)
 787                 smp->status |= IB_SMP_INVALID_FIELD;
 788
 789         return recv_subn_get_pkeytable(smp, ibdev);
 790 }
 791
 792 #define IB_PMA_CLASS_PORT_INFO          __constant_htons(0x0001)
 793 #define IB_PMA_PORT_SAMPLES_CONTROL     __constant_htons(0x0010)
 794 #define IB_PMA_PORT_SAMPLES_RESULT      __constant_htons(0x0011)
 795 #define IB_PMA_PORT_COUNTERS            __constant_htons(0x0012)
 796 #define IB_PMA_PORT_COUNTERS_EXT        __constant_htons(0x001D)
 797 #define IB_PMA_PORT_SAMPLES_RESULT_EXT  __constant_htons(0x001E)
 798
 799 struct ib_perf {
 800         u8 base_version;
 801         u8 mgmt_class;
 802         u8 class_version;
 803         u8 method;
 804         __be16 status;
 805         __be16 unused;
 806         __be64 tid;
 807         __be16 attr_id;
 808         __be16 resv;
 809         __be32 attr_mod;
 810         u8 reserved[40];
 811         u8 data[192];
 812 } __attribute__ ((packed));
 813
 814 struct ib_pma_classportinfo {
 815         u8 base_version;
 816         u8 class_version;
 817         __be16 cap_mask;
 818         u8 reserved[3];
 819         u8 resp_time_value;     /* only lower 5 bits */
 820         union ib_gid redirect_gid;
 821         __be32 redirect_tc_sl_fl;       /* 8, 4, 20 bits respectively */
 822         __be16 redirect_lid;
 823         __be16 redirect_pkey;
 824         __be32 redirect_qp;     /* only lower 24 bits */
 825         __be32 redirect_qkey;
 826         union ib_gid trap_gid;
 827         __be32 trap_tc_sl_fl;   /* 8, 4, 20 bits respectively */
 828         __be16 trap_lid;
 829         __be16 trap_pkey;
 830         __be32 trap_hl_qp;      /* 8, 24 bits respectively */
 831         __be32 trap_qkey;
 832 } __attribute__ ((packed));
 833
 834 struct ib_pma_portsamplescontrol {
 835         u8 opcode;
 836         u8 port_select;
 837         u8 tick;
 838         u8 counter_width;       /* only lower 3 bits */
 839         __be32 counter_mask0_9; /* 2, 10 * 3, bits */
 840         __be16 counter_mask10_14;       /* 1, 5 * 3, bits */
 841         u8 sample_mechanisms;
 842         u8 sample_status;       /* only lower 2 bits */
 843         __be64 option_mask;
 844         __be64 vendor_mask;
 845         __be32 sample_start;
 846         __be32 sample_interval;
 847         __be16 tag;
 848         __be16 counter_select[15];
 849 } __attribute__ ((packed));
 850
 851 struct ib_pma_portsamplesresult {
 852         __be16 tag;
 853         __be16 sample_status;   /* only lower 2 bits */
 854         __be32 counter[15];
 855 } __attribute__ ((packed));
 856
 857 struct ib_pma_portsamplesresult_ext {
 858         __be16 tag;
 859         __be16 sample_status;   /* only lower 2 bits */
 860         __be32 extended_width;  /* only upper 2 bits */
 861         __be64 counter[15];
 862 } __attribute__ ((packed));
 863
 864 struct ib_pma_portcounters {
 865         u8 reserved;
 866         u8 port_select;
 867         __be16 counter_select;
 868         __be16 symbol_error_counter;
 869         u8 link_error_recovery_counter;
 870         u8 link_downed_counter;
 871         __be16 port_rcv_errors;
 872         __be16 port_rcv_remphys_errors;
 873         __be16 port_rcv_switch_relay_errors;
 874         __be16 port_xmit_discards;
 875         u8 port_xmit_constraint_errors;
 876         u8 port_rcv_constraint_errors;
 877         u8 reserved1;
 878         u8 lli_ebor_errors;     /* 4, 4, bits */
 879         __be16 reserved2;
 880         __be16 vl15_dropped;
 881         __be32 port_xmit_data;
 882         __be32 port_rcv_data;
 883         __be32 port_xmit_packets;
 884         __be32 port_rcv_packets;
 885 } __attribute__ ((packed));
 886
 887 #define IB_PMA_SEL_SYMBOL_ERROR                 __constant_htons(0x0001)
 888 #define IB_PMA_SEL_LINK_ERROR_RECOVERY          __constant_htons(0x0002)
 889 #define IB_PMA_SEL_LINK_DOWNED                  __constant_htons(0x0004)
 890 #define IB_PMA_SEL_PORT_RCV_ERRORS              __constant_htons(0x0008)
 891 #define IB_PMA_SEL_PORT_RCV_REMPHYS_ERRORS      __constant_htons(0x0010)
 892 #define IB_PMA_SEL_PORT_XMIT_DISCARDS           __constant_htons(0x0040)
 893 #define IB_PMA_SEL_LOCAL_LINK_INTEGRITY_ERRORS  __constant_htons(0x0200)
 894 #define IB_PMA_SEL_EXCESSIVE_BUFFER_OVERRUNS    __constant_htons(0x0400)
 895 #define IB_PMA_SEL_PORT_VL15_DROPPED            __constant_htons(0x0800)
 896 #define IB_PMA_SEL_PORT_XMIT_DATA               __constant_htons(0x1000)
 897 #define IB_PMA_SEL_PORT_RCV_DATA                __constant_htons(0x2000)
 898 #define IB_PMA_SEL_PORT_XMIT_PACKETS            __constant_htons(0x4000)
 899 #define IB_PMA_SEL_PORT_RCV_PACKETS             __constant_htons(0x8000)
 900
 901 struct ib_pma_portcounters_ext {
 902         u8 reserved;
 903         u8 port_select;
 904         __be16 counter_select;
 905         __be32 reserved1;
 906         __be64 port_xmit_data;
 907         __be64 port_rcv_data;
 908         __be64 port_xmit_packets;
 909         __be64 port_rcv_packets;
 910         __be64 port_unicast_xmit_packets;
 911         __be64 port_unicast_rcv_packets;
 912         __be64 port_multicast_xmit_packets;
 913         __be64 port_multicast_rcv_packets;
 914 } __attribute__ ((packed));
 915
 916 #define IB_PMA_SELX_PORT_XMIT_DATA              __constant_htons(0x0001)
 917 #define IB_PMA_SELX_PORT_RCV_DATA               __constant_htons(0x0002)
 918 #define IB_PMA_SELX_PORT_XMIT_PACKETS           __constant_htons(0x0004)
 919 #define IB_PMA_SELX_PORT_RCV_PACKETS            __constant_htons(0x0008)
 920 #define IB_PMA_SELX_PORT_UNI_XMIT_PACKETS       __constant_htons(0x0010)
 921 #define IB_PMA_SELX_PORT_UNI_RCV_PACKETS        __constant_htons(0x0020)
 922 #define IB_PMA_SELX_PORT_MULTI_XMIT_PACKETS     __constant_htons(0x0040)
 923 #define IB_PMA_SELX_PORT_MULTI_RCV_PACKETS      __constant_htons(0x0080)
 924
 925 static int recv_pma_get_classportinfo(struct ib_perf *pmp)
 926 {
 927         struct ib_pma_classportinfo *p =
 928                 (struct ib_pma_classportinfo *)pmp->data;
 929
 930         memset(pmp->data, 0, sizeof(pmp->data));
 931
 932         if (pmp->attr_mod != 0)
 933                 pmp->status |= IB_SMP_INVALID_FIELD;
 934
 935         /* Indicate AllPortSelect is valid (only one port anyway) */
 936         p->cap_mask = __constant_cpu_to_be16(1 << 8);
 937         p->base_version = 1;
 938         p->class_version = 1;
 939         /*
 940          * Expected response time is 4.096 usec. * 2^18 == 1.073741824
 941          * sec.
 942          */
 943         p->resp_time_value = 18;
 944
 945         return reply((struct ib_smp *) pmp);
 946 }
 947
 948 /*
 949  * The PortSamplesControl.CounterMasks field is an array of 3 bit fields
 950  * which specify the N'th counter's capabilities. See ch. 16.1.3.2.
 951  * We support 5 counters which only count the mandatory quantities.
 952  */
 953 #define COUNTER_MASK(q, n) (q << ((9 - n) * 3))
 954 #define COUNTER_MASK0_9 \
 955         __constant_cpu_to_be32(COUNTER_MASK(1, 0) | \
 956                                COUNTER_MASK(1, 1) | \
 957                                COUNTER_MASK(1, 2) | \
 958                                COUNTER_MASK(1, 3) | \
 959                                COUNTER_MASK(1, 4))
 960
 961 static int recv_pma_get_portsamplescontrol(struct ib_perf *pmp,
 962                                            struct ib_device *ibdev, u8 port)
 963 {
 964         struct ib_pma_portsamplescontrol *p =
 965                 (struct ib_pma_portsamplescontrol *)pmp->data;
 966         struct ipath_ibdev *dev = to_idev(ibdev);
 967         struct ipath_cregs const *crp = dev->dd->ipath_cregs;
 968         unsigned long flags;
 969         u8 port_select = p->port_select;
 970
 971         memset(pmp->data, 0, sizeof(pmp->data));
 972
 973         p->port_select = port_select;
 974         if (pmp->attr_mod != 0 ||
 975             (port_select != port && port_select != 0xFF))
 976                 pmp->status |= IB_SMP_INVALID_FIELD;
 977         /*
 978          * Ticks are 10x the link transfer period which for 2.5Gbs is 4
 979          * nsec.  0 == 4 nsec., 1 == 8 nsec., ..., 255 == 1020 nsec.  Sample
 980          * intervals are counted in ticks.  Since we use Linux timers, that
 981          * count in jiffies, we can't sample for less than 1000 ticks if HZ
 982          * == 1000 (4000 ticks if HZ is 250).  link_speed_active returns 2 for
 983          * DDR, 1 for SDR, set the tick to 1 for DDR, 0 for SDR on chips that
 984          * have hardware support for delaying packets.
 985          */
 986         if (crp->cr_psstat)
 987                 p->tick = dev->dd->ipath_link_speed_active - 1;
 988         else
 989                 p->tick = 250;          /* 1 usec. */
 990         p->counter_width = 4;   /* 32 bit counters */
 991         p->counter_mask0_9 = COUNTER_MASK0_9;
 992         spin_lock_irqsave(&dev->pending_lock, flags);
 993         if (crp->cr_psstat)
 994                 p->sample_status = ipath_read_creg32(dev->dd, crp->cr_psstat);
 995         else
 996                 p->sample_status = dev->pma_sample_status;
 997         p->sample_start = cpu_to_be32(dev->pma_sample_start);
 998         p->sample_interval = cpu_to_be32(dev->pma_sample_interval);
 999         p->tag = cpu_to_be16(dev->pma_tag);
1000         p->counter_select[0] = dev->pma_counter_select[0];
1001         p->counter_select[1] = dev->pma_counter_select[1];
1002         p->counter_select[2] = dev->pma_counter_select[2];
1003         p->counter_select[3] = dev->pma_counter_select[3];
1004         p->counter_select[4] = dev->pma_counter_select[4];
1005         spin_unlock_irqrestore(&dev->pending_lock, flags);
1006
1007         return reply((struct ib_smp *) pmp);
1008 }
1009
1010 static int recv_pma_set_portsamplescontrol(struct ib_perf *pmp,
1011                                            struct ib_device *ibdev, u8 port)
1012 {
1013         struct ib_pma_portsamplescontrol *p =
1014                 (struct ib_pma_portsamplescontrol *)pmp->data;
1015         struct ipath_ibdev *dev = to_idev(ibdev);
1016         struct ipath_cregs const *crp = dev->dd->ipath_cregs;
1017         unsigned long flags;
1018         u8 status;
1019         int ret;
1020
1021         if (pmp->attr_mod != 0 ||
1022             (p->port_select != port && p->port_select != 0xFF)) {
1023                 pmp->status |= IB_SMP_INVALID_FIELD;
1024                 ret = reply((struct ib_smp *) pmp);
1025                 goto bail;
1026         }
1027
1028         spin_lock_irqsave(&dev->pending_lock, flags);
1029         if (crp->cr_psstat)
1030                 status = ipath_read_creg32(dev->dd, crp->cr_psstat);
1031         else
1032                 status = dev->pma_sample_status;
1033         if (status == IB_PMA_SAMPLE_STATUS_DONE) {
1034                 dev->pma_sample_start = be32_to_cpu(p->sample_start);
1035                 dev->pma_sample_interval = be32_to_cpu(p->sample_interval);
1036                 dev->pma_tag = be16_to_cpu(p->tag);
1037                 dev->pma_counter_select[0] = p->counter_select[0];
1038                 dev->pma_counter_select[1] = p->counter_select[1];
1039                 dev->pma_counter_select[2] = p->counter_select[2];
1040                 dev->pma_counter_select[3] = p->counter_select[3];
1041                 dev->pma_counter_select[4] = p->counter_select[4];
1042                 if (crp->cr_psstat) {
1043                         ipath_write_creg(dev->dd, crp->cr_psinterval,
1044                                          dev->pma_sample_interval);
1045                         ipath_write_creg(dev->dd, crp->cr_psstart,
1046                                          dev->pma_sample_start);
1047                 } else
1048                         dev->pma_sample_status = IB_PMA_SAMPLE_STATUS_STARTED;
1049         }
1050         spin_unlock_irqrestore(&dev->pending_lock, flags);
1051
1052         ret = recv_pma_get_portsamplescontrol(pmp, ibdev, port);
1053
1054 bail:
1055         return ret;
1056 }
1057
1058 static u64 get_counter(struct ipath_ibdev *dev,
1059                        struct ipath_cregs const *crp,
1060                        __be16 sel)
1061 {
1062         u64 ret;
1063
1064         switch (sel) {
1065         case IB_PMA_PORT_XMIT_DATA:
1066                 ret = (crp->cr_psxmitdatacount) ?
1067                         ipath_read_creg32(dev->dd, crp->cr_psxmitdatacount) :
1068                         dev->ipath_sword;
1069                 break;
1070         case IB_PMA_PORT_RCV_DATA:
1071                 ret = (crp->cr_psrcvdatacount) ?
1072                         ipath_read_creg32(dev->dd, crp->cr_psrcvdatacount) :
1073                         dev->ipath_rword;
1074                 break;
1075         case IB_PMA_PORT_XMIT_PKTS:
1076                 ret = (crp->cr_psxmitpktscount) ?
1077                         ipath_read_creg32(dev->dd, crp->cr_psxmitpktscount) :
1078                         dev->ipath_spkts;
1079                 break;
1080         case IB_PMA_PORT_RCV_PKTS:
1081                 ret = (crp->cr_psrcvpktscount) ?
1082                         ipath_read_creg32(dev->dd, crp->cr_psrcvpktscount) :
1083                         dev->ipath_rpkts;
1084                 break;
1085         case IB_PMA_PORT_XMIT_WAIT:
1086                 ret = (crp->cr_psxmitwaitcount) ?
1087                         ipath_read_creg32(dev->dd, crp->cr_psxmitwaitcount) :
1088                         dev->ipath_xmit_wait;
1089                 break;
1090         default:
1091                 ret = 0;
1092         }
1093
1094         return ret;
1095 }
1096
1097 static int recv_pma_get_portsamplesresult(struct ib_perf *pmp,
1098                                           struct ib_device *ibdev)
1099 {
1100         struct ib_pma_portsamplesresult *p =
1101                 (struct ib_pma_portsamplesresult *)pmp->data;
1102         struct ipath_ibdev *dev = to_idev(ibdev);
1103         struct ipath_cregs const *crp = dev->dd->ipath_cregs;
1104         u8 status;
1105         int i;
1106
1107         memset(pmp->data, 0, sizeof(pmp->data));
1108         p->tag = cpu_to_be16(dev->pma_tag);
1109         if (crp->cr_psstat)
1110                 status = ipath_read_creg32(dev->dd, crp->cr_psstat);
1111         else
1112                 status = dev->pma_sample_status;
1113         p->sample_status = cpu_to_be16(status);
1114         for (i = 0; i < ARRAY_SIZE(dev->pma_counter_select); i++)
1115                 p->counter[i] = (status != IB_PMA_SAMPLE_STATUS_DONE) ? 0 :
1116                     cpu_to_be32(
1117                         get_counter(dev, crp, dev->pma_counter_select[i]));
1118
1119         return reply((struct ib_smp *) pmp);
1120 }
1121
1122 static int recv_pma_get_portsamplesresult_ext(struct ib_perf *pmp,
1123                                               struct ib_device *ibdev)
1124 {
1125         struct ib_pma_portsamplesresult_ext *p =
1126                 (struct ib_pma_portsamplesresult_ext *)pmp->data;
1127         struct ipath_ibdev *dev = to_idev(ibdev);
1128         struct ipath_cregs const *crp = dev->dd->ipath_cregs;
1129         u8 status;
1130         int i;
1131
1132         memset(pmp->data, 0, sizeof(pmp->data));
1133         p->tag = cpu_to_be16(dev->pma_tag);
1134         if (crp->cr_psstat)
1135                 status = ipath_read_creg32(dev->dd, crp->cr_psstat);
1136         else
1137                 status = dev->pma_sample_status;
1138         p->sample_status = cpu_to_be16(status);
1139         /* 64 bits */
1140         p->extended_width = __constant_cpu_to_be32(0x80000000);
1141         for (i = 0; i < ARRAY_SIZE(dev->pma_counter_select); i++)
1142                 p->counter[i] = (status != IB_PMA_SAMPLE_STATUS_DONE) ? 0 :
1143                     cpu_to_be64(
1144                         get_counter(dev, crp, dev->pma_counter_select[i]));
1145
1146         return reply((struct ib_smp *) pmp);
1147 }
1148
1149 static int recv_pma_get_portcounters(struct ib_perf *pmp,
1150                                      struct ib_device *ibdev, u8 port)
1151 {
1152         struct ib_pma_portcounters *p = (struct ib_pma_portcounters *)
1153                 pmp->data;
1154         struct ipath_ibdev *dev = to_idev(ibdev);
1155         struct ipath_verbs_counters cntrs;
1156         u8 port_select = p->port_select;
1157
1158         ipath_get_counters(dev->dd, &cntrs);
1159
1160         /* Adjust counters for any resets done. */
1161         cntrs.symbol_error_counter -= dev->z_symbol_error_counter;
1162         cntrs.link_error_recovery_counter -=
1163                 dev->z_link_error_recovery_counter;
1164         cntrs.link_downed_counter -= dev->z_link_downed_counter;
1165         cntrs.port_rcv_errors += dev->rcv_errors;
1166         cntrs.port_rcv_errors -= dev->z_port_rcv_errors;
1167         cntrs.port_rcv_remphys_errors -= dev->z_port_rcv_remphys_errors;
1168         cntrs.port_xmit_discards -= dev->z_port_xmit_discards;
1169         cntrs.port_xmit_data -= dev->z_port_xmit_data;
1170         cntrs.port_rcv_data -= dev->z_port_rcv_data;
1171         cntrs.port_xmit_packets -= dev->z_port_xmit_packets;
1172         cntrs.port_rcv_packets -= dev->z_port_rcv_packets;
1173         cntrs.local_link_integrity_errors -=
1174                 dev->z_local_link_integrity_errors;
1175         cntrs.excessive_buffer_overrun_errors -=
1176                 dev->z_excessive_buffer_overrun_errors;
1177         cntrs.vl15_dropped -= dev->z_vl15_dropped;
1178         cntrs.vl15_dropped += dev->n_vl15_dropped;
1179
1180         memset(pmp->data, 0, sizeof(pmp->data));
1181
1182         p->port_select = port_select;
1183         if (pmp->attr_mod != 0 ||
1184             (port_select != port && port_select != 0xFF))
1185                 pmp->status |= IB_SMP_INVALID_FIELD;
1186
1187         if (cntrs.symbol_error_counter > 0xFFFFUL)
1188                 p->symbol_error_counter = __constant_cpu_to_be16(0xFFFF);
1189         else
1190                 p->symbol_error_counter =
1191                         cpu_to_be16((u16)cntrs.symbol_error_counter);
1192         if (cntrs.link_error_recovery_counter > 0xFFUL)
1193                 p->link_error_recovery_counter = 0xFF;
1194         else
1195                 p->link_error_recovery_counter =
1196                         (u8)cntrs.link_error_recovery_counter;
1197         if (cntrs.link_downed_counter > 0xFFUL)
1198                 p->link_downed_counter = 0xFF;
1199         else
1200                 p->link_downed_counter = (u8)cntrs.link_downed_counter;
1201         if (cntrs.port_rcv_errors > 0xFFFFUL)
1202                 p->port_rcv_errors = __constant_cpu_to_be16(0xFFFF);
1203         else
1204                 p->port_rcv_errors =
1205                         cpu_to_be16((u16) cntrs.port_rcv_errors);
1206         if (cntrs.port_rcv_remphys_errors > 0xFFFFUL)
1207                 p->port_rcv_remphys_errors = __constant_cpu_to_be16(0xFFFF);
1208         else
1209                 p->port_rcv_remphys_errors =
1210                         cpu_to_be16((u16)cntrs.port_rcv_remphys_errors);
1211         if (cntrs.port_xmit_discards > 0xFFFFUL)
1212                 p->port_xmit_discards = __constant_cpu_to_be16(0xFFFF);
1213         else
1214                 p->port_xmit_discards =
1215                         cpu_to_be16((u16)cntrs.port_xmit_discards);
1216         if (cntrs.local_link_integrity_errors > 0xFUL)
1217                 cntrs.local_link_integrity_errors = 0xFUL;
1218         if (cntrs.excessive_buffer_overrun_errors > 0xFUL)
1219                 cntrs.excessive_buffer_overrun_errors = 0xFUL;
1220         p->lli_ebor_errors = (cntrs.local_link_integrity_errors << 4) |
1221                 cntrs.excessive_buffer_overrun_errors;
1222         if (cntrs.vl15_dropped > 0xFFFFUL)
1223                 p->vl15_dropped = __constant_cpu_to_be16(0xFFFF);
1224         else
1225                 p->vl15_dropped = cpu_to_be16((u16)cntrs.vl15_dropped);
1226         if (cntrs.port_xmit_data > 0xFFFFFFFFUL)
1227                 p->port_xmit_data = __constant_cpu_to_be32(0xFFFFFFFF);
1228         else
1229                 p->port_xmit_data = cpu_to_be32((u32)cntrs.port_xmit_data);
1230         if (cntrs.port_rcv_data > 0xFFFFFFFFUL)
1231                 p->port_rcv_data = __constant_cpu_to_be32(0xFFFFFFFF);
1232         else
1233                 p->port_rcv_data = cpu_to_be32((u32)cntrs.port_rcv_data);
1234         if (cntrs.port_xmit_packets > 0xFFFFFFFFUL)
1235                 p->port_xmit_packets = __constant_cpu_to_be32(0xFFFFFFFF);
1236         else
1237                 p->port_xmit_packets =
1238                         cpu_to_be32((u32)cntrs.port_xmit_packets);
1239         if (cntrs.port_rcv_packets > 0xFFFFFFFFUL)
1240                 p->port_rcv_packets = __constant_cpu_to_be32(0xFFFFFFFF);
1241         else
1242                 p->port_rcv_packets =
1243                         cpu_to_be32((u32) cntrs.port_rcv_packets);
1244
1245         return reply((struct ib_smp *) pmp);
1246 }
1247
1248 static int recv_pma_get_portcounters_ext(struct ib_perf *pmp,
1249                                          struct ib_device *ibdev, u8 port)
1250 {
1251         struct ib_pma_portcounters_ext *p =
1252                 (struct ib_pma_portcounters_ext *)pmp->data;
1253         struct ipath_ibdev *dev = to_idev(ibdev);
1254         u64 swords, rwords, spkts, rpkts, xwait;
1255         u8 port_select = p->port_select;
1256
1257         ipath_snapshot_counters(dev->dd, &swords, &rwords, &spkts,
1258                                 &rpkts, &xwait);
1259
1260         /* Adjust counters for any resets done. */
1261         swords -= dev->z_port_xmit_data;
1262         rwords -= dev->z_port_rcv_data;
1263         spkts -= dev->z_port_xmit_packets;
1264         rpkts -= dev->z_port_rcv_packets;
1265
1266         memset(pmp->data, 0, sizeof(pmp->data));
1267
1268         p->port_select = port_select;
1269         if (pmp->attr_mod != 0 ||
1270             (port_select != port && port_select != 0xFF))
1271                 pmp->status |= IB_SMP_INVALID_FIELD;
1272
1273         p->port_xmit_data = cpu_to_be64(swords);
1274         p->port_rcv_data = cpu_to_be64(rwords);
1275         p->port_xmit_packets = cpu_to_be64(spkts);
1276         p->port_rcv_packets = cpu_to_be64(rpkts);
1277         p->port_unicast_xmit_packets = cpu_to_be64(dev->n_unicast_xmit);
1278         p->port_unicast_rcv_packets = cpu_to_be64(dev->n_unicast_rcv);
1279         p->port_multicast_xmit_packets = cpu_to_be64(dev->n_multicast_xmit);
1280         p->port_multicast_rcv_packets = cpu_to_be64(dev->n_multicast_rcv);
1281
1282         return reply((struct ib_smp *) pmp);
1283 }
1284
1285 static int recv_pma_set_portcounters(struct ib_perf *pmp,
1286                                      struct ib_device *ibdev, u8 port)
1287 {
1288         struct ib_pma_portcounters *p = (struct ib_pma_portcounters *)
1289                 pmp->data;
1290         struct ipath_ibdev *dev = to_idev(ibdev);
1291         struct ipath_verbs_counters cntrs;
1292
1293         /*
1294          * Since the HW doesn't support clearing counters, we save the
1295          * current count and subtract it from future responses.
1296          */
1297         ipath_get_counters(dev->dd, &cntrs);
1298
1299         if (p->counter_select & IB_PMA_SEL_SYMBOL_ERROR)
1300                 dev->z_symbol_error_counter = cntrs.symbol_error_counter;
1301
1302         if (p->counter_select & IB_PMA_SEL_LINK_ERROR_RECOVERY)
1303                 dev->z_link_error_recovery_counter =
1304                         cntrs.link_error_recovery_counter;
1305
1306         if (p->counter_select & IB_PMA_SEL_LINK_DOWNED)
1307                 dev->z_link_downed_counter = cntrs.link_downed_counter;
1308
1309         if (p->counter_select & IB_PMA_SEL_PORT_RCV_ERRORS)
1310                 dev->z_port_rcv_errors =
1311                         cntrs.port_rcv_errors + dev->rcv_errors;
1312
1313         if (p->counter_select & IB_PMA_SEL_PORT_RCV_REMPHYS_ERRORS)
1314                 dev->z_port_rcv_remphys_errors =
1315                         cntrs.port_rcv_remphys_errors;
1316
1317         if (p->counter_select & IB_PMA_SEL_PORT_XMIT_DISCARDS)
1318                 dev->z_port_xmit_discards = cntrs.port_xmit_discards;
1319
1320         if (p->counter_select & IB_PMA_SEL_LOCAL_LINK_INTEGRITY_ERRORS)
1321                 dev->z_local_link_integrity_errors =
1322                         cntrs.local_link_integrity_errors;
1323
1324         if (p->counter_select & IB_PMA_SEL_EXCESSIVE_BUFFER_OVERRUNS)
1325                 dev->z_excessive_buffer_overrun_errors =
1326                         cntrs.excessive_buffer_overrun_errors;
1327
1328         if (p->counter_select & IB_PMA_SEL_PORT_VL15_DROPPED) {
1329                 dev->n_vl15_dropped = 0;
1330                 dev->z_vl15_dropped = cntrs.vl15_dropped;
1331         }
1332
1333         if (p->counter_select & IB_PMA_SEL_PORT_XMIT_DATA)
1334                 dev->z_port_xmit_data = cntrs.port_xmit_data;
1335
1336         if (p->counter_select & IB_PMA_SEL_PORT_RCV_DATA)
1337                 dev->z_port_rcv_data = cntrs.port_rcv_data;
1338
1339         if (p->counter_select & IB_PMA_SEL_PORT_XMIT_PACKETS)
1340                 dev->z_port_xmit_packets = cntrs.port_xmit_packets;
1341
1342         if (p->counter_select & IB_PMA_SEL_PORT_RCV_PACKETS)
1343                 dev->z_port_rcv_packets = cntrs.port_rcv_packets;
1344
1345         return recv_pma_get_portcounters(pmp, ibdev, port);
1346 }
1347
1348 static int recv_pma_set_portcounters_ext(struct ib_perf *pmp,
1349                                          struct ib_device *ibdev, u8 port)
1350 {
1351         struct ib_pma_portcounters *p = (struct ib_pma_portcounters *)
1352                 pmp->data;
1353         struct ipath_ibdev *dev = to_idev(ibdev);
1354         u64 swords, rwords, spkts, rpkts, xwait;
1355
1356         ipath_snapshot_counters(dev->dd, &swords, &rwords, &spkts,
1357                                 &rpkts, &xwait);
1358
1359         if (p->counter_select & IB_PMA_SELX_PORT_XMIT_DATA)
1360                 dev->z_port_xmit_data = swords;
1361
1362         if (p->counter_select & IB_PMA_SELX_PORT_RCV_DATA)
1363                 dev->z_port_rcv_data = rwords;
1364
1365         if (p->counter_select & IB_PMA_SELX_PORT_XMIT_PACKETS)
1366                 dev->z_port_xmit_packets = spkts;
1367
1368         if (p->counter_select & IB_PMA_SELX_PORT_RCV_PACKETS)
1369                 dev->z_port_rcv_packets = rpkts;
1370
1371         if (p->counter_select & IB_PMA_SELX_PORT_UNI_XMIT_PACKETS)
1372                 dev->n_unicast_xmit = 0;
1373
1374         if (p->counter_select & IB_PMA_SELX_PORT_UNI_RCV_PACKETS)
1375                 dev->n_unicast_rcv = 0;
1376
1377         if (p->counter_select & IB_PMA_SELX_PORT_MULTI_XMIT_PACKETS)
1378                 dev->n_multicast_xmit = 0;
1379
1380         if (p->counter_select & IB_PMA_SELX_PORT_MULTI_RCV_PACKETS)
1381                 dev->n_multicast_rcv = 0;
1382
1383         return recv_pma_get_portcounters_ext(pmp, ibdev, port);
1384 }
1385
1386 static int process_subn(struct ib_device *ibdev, int mad_flags,
1387                         u8 port_num, struct ib_mad *in_mad,
1388                         struct ib_mad *out_mad)
1389 {
1390         struct ib_smp *smp = (struct ib_smp *)out_mad;
1391         struct ipath_ibdev *dev = to_idev(ibdev);
1392         int ret;
1393
1394         *out_mad = *in_mad;
1395         if (smp->class_version != 1) {
1396                 smp->status |= IB_SMP_UNSUP_VERSION;
1397                 ret = reply(smp);
1398                 goto bail;
1399         }
1400
1401         /* Is the mkey in the process of expiring? */
1402         if (dev->mkey_lease_timeout &&
1403             time_after_eq(jiffies, dev->mkey_lease_timeout)) {
1404                 /* Clear timeout and mkey protection field. */
1405                 dev->mkey_lease_timeout = 0;
1406                 dev->mkeyprot = 0;
1407         }
1408
1409         /*
1410          * M_Key checking depends on
1411          * Portinfo:M_Key_protect_bits
1412          */
1413         if ((mad_flags & IB_MAD_IGNORE_MKEY) == 0 && dev->mkey != 0 &&
1414             dev->mkey != smp->mkey &&
1415             (smp->method == IB_MGMT_METHOD_SET ||
1416              (smp->method == IB_MGMT_METHOD_GET &&
1417               dev->mkeyprot >= 2))) {
1418                 if (dev->mkey_violations != 0xFFFF)
1419                         ++dev->mkey_violations;
1420                 if (dev->mkey_lease_timeout ||
1421                     dev->mkey_lease_period == 0) {
1422                         ret = IB_MAD_RESULT_SUCCESS |
1423                                 IB_MAD_RESULT_CONSUMED;
1424                         goto bail;
1425                 }
1426                 dev->mkey_lease_timeout = jiffies +
1427                         dev->mkey_lease_period * HZ;
1428                 /* Future: Generate a trap notice. */
1429                 ret = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
1430                 goto bail;
1431         } else if (dev->mkey_lease_timeout)
1432                 dev->mkey_lease_timeout = 0;
1433
1434         switch (smp->method) {
1435         case IB_MGMT_METHOD_GET:
1436                 switch (smp->attr_id) {
1437                 case IB_SMP_ATTR_NODE_DESC:
1438                         ret = recv_subn_get_nodedescription(smp, ibdev);
1439                         goto bail;
1440                 case IB_SMP_ATTR_NODE_INFO:
1441                         ret = recv_subn_get_nodeinfo(smp, ibdev, port_num);
1442                         goto bail;
1443                 case IB_SMP_ATTR_GUID_INFO:
1444                         ret = recv_subn_get_guidinfo(smp, ibdev);
1445                         goto bail;
1446                 case IB_SMP_ATTR_PORT_INFO:
1447                         ret = recv_subn_get_portinfo(smp, ibdev, port_num);
1448                         goto bail;
1449                 case IB_SMP_ATTR_PKEY_TABLE:
1450                         ret = recv_subn_get_pkeytable(smp, ibdev);
1451                         goto bail;
1452                 case IB_SMP_ATTR_SM_INFO:
1453                         if (dev->port_cap_flags & IB_PORT_SM_DISABLED) {
1454                                 ret = IB_MAD_RESULT_SUCCESS |
1455                                         IB_MAD_RESULT_CONSUMED;
1456                                 goto bail;
1457                         }
1458                         if (dev->port_cap_flags & IB_PORT_SM) {
1459                                 ret = IB_MAD_RESULT_SUCCESS;
1460                                 goto bail;
1461                         }
1462                         /* FALLTHROUGH */
1463                 default:
1464                         smp->status |= IB_SMP_UNSUP_METH_ATTR;
1465                         ret = reply(smp);
1466                         goto bail;
1467                 }
1468
1469         case IB_MGMT_METHOD_SET:
1470                 switch (smp->attr_id) {
1471                 case IB_SMP_ATTR_GUID_INFO:
1472                         ret = recv_subn_set_guidinfo(smp, ibdev);
1473                         goto bail;
1474                 case IB_SMP_ATTR_PORT_INFO:
1475                         ret = recv_subn_set_portinfo(smp, ibdev, port_num);
1476                         goto bail;
1477                 case IB_SMP_ATTR_PKEY_TABLE:
1478                         ret = recv_subn_set_pkeytable(smp, ibdev);
1479                         goto bail;
1480                 case IB_SMP_ATTR_SM_INFO:
1481                         if (dev->port_cap_flags & IB_PORT_SM_DISABLED) {
1482                                 ret = IB_MAD_RESULT_SUCCESS |
1483                                         IB_MAD_RESULT_CONSUMED;
1484                                 goto bail;
1485                         }
1486                         if (dev->port_cap_flags & IB_PORT_SM) {
1487                                 ret = IB_MAD_RESULT_SUCCESS;
1488                                 goto bail;
1489                         }
1490                         /* FALLTHROUGH */
1491                 default:
1492                         smp->status |= IB_SMP_UNSUP_METH_ATTR;
1493                         ret = reply(smp);
1494                         goto bail;
1495                 }
1496
1497         case IB_MGMT_METHOD_TRAP:
1498         case IB_MGMT_METHOD_REPORT:
1499         case IB_MGMT_METHOD_REPORT_RESP:
1500         case IB_MGMT_METHOD_TRAP_REPRESS:
1501         case IB_MGMT_METHOD_GET_RESP:
1502                 /*
1503                  * The ib_mad module will call us to process responses
1504                  * before checking for other consumers.
1505                  * Just tell the caller to process it normally.
1506                  */
1507                 ret = IB_MAD_RESULT_SUCCESS;
1508                 goto bail;
1509         default:
1510                 smp->status |= IB_SMP_UNSUP_METHOD;
1511                 ret = reply(smp);
1512         }
1513
1514 bail:
1515         return ret;
1516 }
1517
1518 static int process_perf(struct ib_device *ibdev, u8 port_num,
1519                         struct ib_mad *in_mad,
1520                         struct ib_mad *out_mad)
1521 {
1522         struct ib_perf *pmp = (struct ib_perf *)out_mad;
1523         int ret;
1524
1525         *out_mad = *in_mad;
1526         if (pmp->class_version != 1) {
1527                 pmp->status |= IB_SMP_UNSUP_VERSION;
1528                 ret = reply((struct ib_smp *) pmp);
1529                 goto bail;
1530         }
1531
1532         switch (pmp->method) {
1533         case IB_MGMT_METHOD_GET:
1534                 switch (pmp->attr_id) {
1535                 case IB_PMA_CLASS_PORT_INFO:
1536                         ret = recv_pma_get_classportinfo(pmp);
1537                         goto bail;
1538                 case IB_PMA_PORT_SAMPLES_CONTROL:
1539                         ret = recv_pma_get_portsamplescontrol(pmp, ibdev,
1540                                                               port_num);
1541                         goto bail;
1542                 case IB_PMA_PORT_SAMPLES_RESULT:
1543                         ret = recv_pma_get_portsamplesresult(pmp, ibdev);
1544                         goto bail;
1545                 case IB_PMA_PORT_SAMPLES_RESULT_EXT:
1546                         ret = recv_pma_get_portsamplesresult_ext(pmp,
1547                                                                  ibdev);
1548                         goto bail;
1549                 case IB_PMA_PORT_COUNTERS:
1550                         ret = recv_pma_get_portcounters(pmp, ibdev,
1551                                                         port_num);
1552                         goto bail;
1553                 case IB_PMA_PORT_COUNTERS_EXT:
1554                         ret = recv_pma_get_portcounters_ext(pmp, ibdev,
1555                                                             port_num);
1556                         goto bail;
1557                 default:
1558                         pmp->status |= IB_SMP_UNSUP_METH_ATTR;
1559                         ret = reply((struct ib_smp *) pmp);
1560                         goto bail;
1561                 }
1562
1563         case IB_MGMT_METHOD_SET:
1564                 switch (pmp->attr_id) {
1565                 case IB_PMA_PORT_SAMPLES_CONTROL:
1566                         ret = recv_pma_set_portsamplescontrol(pmp, ibdev,
1567                                                               port_num);
1568                         goto bail;
1569                 case IB_PMA_PORT_COUNTERS:
1570                         ret = recv_pma_set_portcounters(pmp, ibdev,
1571                                                         port_num);
1572                         goto bail;
1573                 case IB_PMA_PORT_COUNTERS_EXT:
1574                         ret = recv_pma_set_portcounters_ext(pmp, ibdev,
1575                                                             port_num);
1576                         goto bail;
1577                 default:
1578                         pmp->status |= IB_SMP_UNSUP_METH_ATTR;
1579                         ret = reply((struct ib_smp *) pmp);
1580                         goto bail;
1581                 }
1582
1583         case IB_MGMT_METHOD_GET_RESP:
1584                 /*
1585                  * The ib_mad module will call us to process responses
1586                  * before checking for other consumers.
1587                  * Just tell the caller to process it normally.
1588                  */
1589                 ret = IB_MAD_RESULT_SUCCESS;
1590                 goto bail;
1591         default:
1592                 pmp->status |= IB_SMP_UNSUP_METHOD;
1593                 ret = reply((struct ib_smp *) pmp);
1594         }
1595
1596 bail:
1597         return ret;
1598 }
1599
1600 /**
1601  * ipath_process_mad - process an incoming MAD packet
1602  * @ibdev: the infiniband device this packet came in on
1603  * @mad_flags: MAD flags
1604  * @port_num: the port number this packet came in on
1605  * @in_wc: the work completion entry for this packet
1606  * @in_grh: the global route header for this packet
1607  * @in_mad: the incoming MAD
1608  * @out_mad: any outgoing MAD reply
1609  *
1610  * Returns IB_MAD_RESULT_SUCCESS if this is a MAD that we are not
1611  * interested in processing.
1612  *
1613  * Note that the verbs framework has already done the MAD sanity checks,
1614  * and hop count/pointer updating for IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
1615  * MADs.
1616  *
1617  * This is called by the ib_mad module.
1618  */
1619 int ipath_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
1620                       struct ib_wc *in_wc, struct ib_grh *in_grh,
1621                       struct ib_mad *in_mad, struct ib_mad *out_mad)
1622 {
1623         int ret;
1624
1625         switch (in_mad->mad_hdr.mgmt_class) {
1626         case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
1627         case IB_MGMT_CLASS_SUBN_LID_ROUTED:
1628                 ret = process_subn(ibdev, mad_flags, port_num,
1629                                    in_mad, out_mad);
1630                 goto bail;
1631         case IB_MGMT_CLASS_PERF_MGMT:
1632                 ret = process_perf(ibdev, port_num, in_mad, out_mad);
1633                 goto bail;
1634         default:
1635                 ret = IB_MAD_RESULT_SUCCESS;
1636         }
1637
1638 bail:
1639         return ret;
1640 }