linux/drivers/infiniband/hw/hfi1/mad.c
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   1/*
   2 * Copyright(c) 2015-2018 Intel Corporation.
   3 *
   4 * This file is provided under a dual BSD/GPLv2 license.  When using or
   5 * redistributing this file, you may do so under either license.
   6 *
   7 * GPL LICENSE SUMMARY
   8 *
   9 * This program is free software; you can redistribute it and/or modify
  10 * it under the terms of version 2 of the GNU General Public License as
  11 * published by the Free Software Foundation.
  12 *
  13 * This program is distributed in the hope that it will be useful, but
  14 * WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 * General Public License for more details.
  17 *
  18 * BSD LICENSE
  19 *
  20 * Redistribution and use in source and binary forms, with or without
  21 * modification, are permitted provided that the following conditions
  22 * are met:
  23 *
  24 *  - Redistributions of source code must retain the above copyright
  25 *    notice, this list of conditions and the following disclaimer.
  26 *  - Redistributions in binary form must reproduce the above copyright
  27 *    notice, this list of conditions and the following disclaimer in
  28 *    the documentation and/or other materials provided with the
  29 *    distribution.
  30 *  - Neither the name of Intel Corporation nor the names of its
  31 *    contributors may be used to endorse or promote products derived
  32 *    from this software without specific prior written permission.
  33 *
  34 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  35 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  36 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  37 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  38 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  39 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  40 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  41 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  42 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  43 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  44 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  45 *
  46 */
  47
  48#include <linux/net.h>
  49#include <rdma/opa_addr.h>
  50#define OPA_NUM_PKEY_BLOCKS_PER_SMP (OPA_SMP_DR_DATA_SIZE \
  51                        / (OPA_PARTITION_TABLE_BLK_SIZE * sizeof(u16)))
  52
  53#include "hfi.h"
  54#include "mad.h"
  55#include "trace.h"
  56#include "qp.h"
  57#include "vnic.h"
  58
  59/* the reset value from the FM is supposed to be 0xffff, handle both */
  60#define OPA_LINK_WIDTH_RESET_OLD 0x0fff
  61#define OPA_LINK_WIDTH_RESET 0xffff
  62
  63struct trap_node {
  64        struct list_head list;
  65        struct opa_mad_notice_attr data;
  66        __be64 tid;
  67        int len;
  68        u32 retry;
  69        u8 in_use;
  70        u8 repress;
  71};
  72
  73static int smp_length_check(u32 data_size, u32 request_len)
  74{
  75        if (unlikely(request_len < data_size))
  76                return -EINVAL;
  77
  78        return 0;
  79}
  80
  81static int reply(struct ib_mad_hdr *smp)
  82{
  83        /*
  84         * The verbs framework will handle the directed/LID route
  85         * packet changes.
  86         */
  87        smp->method = IB_MGMT_METHOD_GET_RESP;
  88        if (smp->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
  89                smp->status |= IB_SMP_DIRECTION;
  90        return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
  91}
  92
  93static inline void clear_opa_smp_data(struct opa_smp *smp)
  94{
  95        void *data = opa_get_smp_data(smp);
  96        size_t size = opa_get_smp_data_size(smp);
  97
  98        memset(data, 0, size);
  99}
 100
 101static u16 hfi1_lookup_pkey_value(struct hfi1_ibport *ibp, int pkey_idx)
 102{
 103        struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
 104
 105        if (pkey_idx < ARRAY_SIZE(ppd->pkeys))
 106                return ppd->pkeys[pkey_idx];
 107
 108        return 0;
 109}
 110
 111void hfi1_event_pkey_change(struct hfi1_devdata *dd, u8 port)
 112{
 113        struct ib_event event;
 114
 115        event.event = IB_EVENT_PKEY_CHANGE;
 116        event.device = &dd->verbs_dev.rdi.ibdev;
 117        event.element.port_num = port;
 118        ib_dispatch_event(&event);
 119}
 120
 121/*
 122 * If the port is down, clean up all pending traps.  We need to be careful
 123 * with the given trap, because it may be queued.
 124 */
 125static void cleanup_traps(struct hfi1_ibport *ibp, struct trap_node *trap)
 126{
 127        struct trap_node *node, *q;
 128        unsigned long flags;
 129        struct list_head trap_list;
 130        int i;
 131
 132        for (i = 0; i < RVT_MAX_TRAP_LISTS; i++) {
 133                spin_lock_irqsave(&ibp->rvp.lock, flags);
 134                list_replace_init(&ibp->rvp.trap_lists[i].list, &trap_list);
 135                ibp->rvp.trap_lists[i].list_len = 0;
 136                spin_unlock_irqrestore(&ibp->rvp.lock, flags);
 137
 138                /*
 139                 * Remove all items from the list, freeing all the non-given
 140                 * traps.
 141                 */
 142                list_for_each_entry_safe(node, q, &trap_list, list) {
 143                        list_del(&node->list);
 144                        if (node != trap)
 145                                kfree(node);
 146                }
 147        }
 148
 149        /*
 150         * If this wasn't on one of the lists it would not be freed.  If it
 151         * was on the list, it is now safe to free.
 152         */
 153        kfree(trap);
 154}
 155
 156static struct trap_node *check_and_add_trap(struct hfi1_ibport *ibp,
 157                                            struct trap_node *trap)
 158{
 159        struct trap_node *node;
 160        struct trap_list *trap_list;
 161        unsigned long flags;
 162        unsigned long timeout;
 163        int found = 0;
 164        unsigned int queue_id;
 165        static int trap_count;
 166
 167        queue_id = trap->data.generic_type & 0x0F;
 168        if (queue_id >= RVT_MAX_TRAP_LISTS) {
 169                trap_count++;
 170                pr_err_ratelimited("hfi1: Invalid trap 0x%0x dropped. Total dropped: %d\n",
 171                                   trap->data.generic_type, trap_count);
 172                kfree(trap);
 173                return NULL;
 174        }
 175
 176        /*
 177         * Since the retry (handle timeout) does not remove a trap request
 178         * from the list, all we have to do is compare the node.
 179         */
 180        spin_lock_irqsave(&ibp->rvp.lock, flags);
 181        trap_list = &ibp->rvp.trap_lists[queue_id];
 182
 183        list_for_each_entry(node, &trap_list->list, list) {
 184                if (node == trap) {
 185                        node->retry++;
 186                        found = 1;
 187                        break;
 188                }
 189        }
 190
 191        /* If it is not on the list, add it, limited to RVT-MAX_TRAP_LEN. */
 192        if (!found) {
 193                if (trap_list->list_len < RVT_MAX_TRAP_LEN) {
 194                        trap_list->list_len++;
 195                        list_add_tail(&trap->list, &trap_list->list);
 196                } else {
 197                        pr_warn_ratelimited("hfi1: Maximum trap limit reached for 0x%0x traps\n",
 198                                            trap->data.generic_type);
 199                        kfree(trap);
 200                }
 201        }
 202
 203        /*
 204         * Next check to see if there is a timer pending.  If not, set it up
 205         * and get the first trap from the list.
 206         */
 207        node = NULL;
 208        if (!timer_pending(&ibp->rvp.trap_timer)) {
 209                /*
 210                 * o14-2
 211                 * If the time out is set we have to wait until it expires
 212                 * before the trap can be sent.
 213                 * This should be > RVT_TRAP_TIMEOUT
 214                 */
 215                timeout = (RVT_TRAP_TIMEOUT *
 216                           (1UL << ibp->rvp.subnet_timeout)) / 1000;
 217                mod_timer(&ibp->rvp.trap_timer,
 218                          jiffies + usecs_to_jiffies(timeout));
 219                node = list_first_entry(&trap_list->list, struct trap_node,
 220                                        list);
 221                node->in_use = 1;
 222        }
 223        spin_unlock_irqrestore(&ibp->rvp.lock, flags);
 224
 225        return node;
 226}
 227
 228static void subn_handle_opa_trap_repress(struct hfi1_ibport *ibp,
 229                                         struct opa_smp *smp)
 230{
 231        struct trap_list *trap_list;
 232        struct trap_node *trap;
 233        unsigned long flags;
 234        int i;
 235
 236        if (smp->attr_id != IB_SMP_ATTR_NOTICE)
 237                return;
 238
 239        spin_lock_irqsave(&ibp->rvp.lock, flags);
 240        for (i = 0; i < RVT_MAX_TRAP_LISTS; i++) {
 241                trap_list = &ibp->rvp.trap_lists[i];
 242                trap = list_first_entry_or_null(&trap_list->list,
 243                                                struct trap_node, list);
 244                if (trap && trap->tid == smp->tid) {
 245                        if (trap->in_use) {
 246                                trap->repress = 1;
 247                        } else {
 248                                trap_list->list_len--;
 249                                list_del(&trap->list);
 250                                kfree(trap);
 251                        }
 252                        break;
 253                }
 254        }
 255        spin_unlock_irqrestore(&ibp->rvp.lock, flags);
 256}
 257
 258static void hfi1_update_sm_ah_attr(struct hfi1_ibport *ibp,
 259                                   struct rdma_ah_attr *attr, u32 dlid)
 260{
 261        rdma_ah_set_dlid(attr, dlid);
 262        rdma_ah_set_port_num(attr, ppd_from_ibp(ibp)->port);
 263        if (dlid >= be16_to_cpu(IB_MULTICAST_LID_BASE)) {
 264                struct ib_global_route *grh = rdma_ah_retrieve_grh(attr);
 265
 266                rdma_ah_set_ah_flags(attr, IB_AH_GRH);
 267                grh->sgid_index = 0;
 268                grh->hop_limit = 1;
 269                grh->dgid.global.subnet_prefix =
 270                        ibp->rvp.gid_prefix;
 271                grh->dgid.global.interface_id = OPA_MAKE_ID(dlid);
 272        }
 273}
 274
 275static int hfi1_modify_qp0_ah(struct hfi1_ibport *ibp,
 276                              struct rvt_ah *ah, u32 dlid)
 277{
 278        struct rdma_ah_attr attr;
 279        struct rvt_qp *qp0;
 280        int ret = -EINVAL;
 281
 282        memset(&attr, 0, sizeof(attr));
 283        attr.type = ah->ibah.type;
 284        hfi1_update_sm_ah_attr(ibp, &attr, dlid);
 285        rcu_read_lock();
 286        qp0 = rcu_dereference(ibp->rvp.qp[0]);
 287        if (qp0)
 288                ret = rdma_modify_ah(&ah->ibah, &attr);
 289        rcu_read_unlock();
 290        return ret;
 291}
 292
 293static struct ib_ah *hfi1_create_qp0_ah(struct hfi1_ibport *ibp, u32 dlid)
 294{
 295        struct rdma_ah_attr attr;
 296        struct ib_ah *ah = ERR_PTR(-EINVAL);
 297        struct rvt_qp *qp0;
 298        struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
 299        struct hfi1_devdata *dd = dd_from_ppd(ppd);
 300        u8 port_num = ppd->port;
 301
 302        memset(&attr, 0, sizeof(attr));
 303        attr.type = rdma_ah_find_type(&dd->verbs_dev.rdi.ibdev, port_num);
 304        hfi1_update_sm_ah_attr(ibp, &attr, dlid);
 305        rcu_read_lock();
 306        qp0 = rcu_dereference(ibp->rvp.qp[0]);
 307        if (qp0)
 308                ah = rdma_create_ah(qp0->ibqp.pd, &attr, 0);
 309        rcu_read_unlock();
 310        return ah;
 311}
 312
 313static void send_trap(struct hfi1_ibport *ibp, struct trap_node *trap)
 314{
 315        struct ib_mad_send_buf *send_buf;
 316        struct ib_mad_agent *agent;
 317        struct opa_smp *smp;
 318        unsigned long flags;
 319        int pkey_idx;
 320        u32 qpn = ppd_from_ibp(ibp)->sm_trap_qp;
 321
 322        agent = ibp->rvp.send_agent;
 323        if (!agent) {
 324                cleanup_traps(ibp, trap);
 325                return;
 326        }
 327
 328        /* o14-3.2.1 */
 329        if (driver_lstate(ppd_from_ibp(ibp)) != IB_PORT_ACTIVE) {
 330                cleanup_traps(ibp, trap);
 331                return;
 332        }
 333
 334        /* Add the trap to the list if necessary and see if we can send it */
 335        trap = check_and_add_trap(ibp, trap);
 336        if (!trap)
 337                return;
 338
 339        pkey_idx = hfi1_lookup_pkey_idx(ibp, LIM_MGMT_P_KEY);
 340        if (pkey_idx < 0) {
 341                pr_warn("%s: failed to find limited mgmt pkey, defaulting 0x%x\n",
 342                        __func__, hfi1_get_pkey(ibp, 1));
 343                pkey_idx = 1;
 344        }
 345
 346        send_buf = ib_create_send_mad(agent, qpn, pkey_idx, 0,
 347                                      IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
 348                                      GFP_ATOMIC, IB_MGMT_BASE_VERSION);
 349        if (IS_ERR(send_buf))
 350                return;
 351
 352        smp = send_buf->mad;
 353        smp->base_version = OPA_MGMT_BASE_VERSION;
 354        smp->mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
 355        smp->class_version = OPA_SM_CLASS_VERSION;
 356        smp->method = IB_MGMT_METHOD_TRAP;
 357
 358        /* Only update the transaction ID for new traps (o13-5). */
 359        if (trap->tid == 0) {
 360                ibp->rvp.tid++;
 361                /* make sure that tid != 0 */
 362                if (ibp->rvp.tid == 0)
 363                        ibp->rvp.tid++;
 364                trap->tid = cpu_to_be64(ibp->rvp.tid);
 365        }
 366        smp->tid = trap->tid;
 367
 368        smp->attr_id = IB_SMP_ATTR_NOTICE;
 369        /* o14-1: smp->mkey = 0; */
 370
 371        memcpy(smp->route.lid.data, &trap->data, trap->len);
 372
 373        spin_lock_irqsave(&ibp->rvp.lock, flags);
 374        if (!ibp->rvp.sm_ah) {
 375                if (ibp->rvp.sm_lid != be16_to_cpu(IB_LID_PERMISSIVE)) {
 376                        struct ib_ah *ah;
 377
 378                        ah = hfi1_create_qp0_ah(ibp, ibp->rvp.sm_lid);
 379                        if (IS_ERR(ah)) {
 380                                spin_unlock_irqrestore(&ibp->rvp.lock, flags);
 381                                return;
 382                        }
 383                        send_buf->ah = ah;
 384                        ibp->rvp.sm_ah = ibah_to_rvtah(ah);
 385                } else {
 386                        spin_unlock_irqrestore(&ibp->rvp.lock, flags);
 387                        return;
 388                }
 389        } else {
 390                send_buf->ah = &ibp->rvp.sm_ah->ibah;
 391        }
 392
 393        /*
 394         * If the trap was repressed while things were getting set up, don't
 395         * bother sending it. This could happen for a retry.
 396         */
 397        if (trap->repress) {
 398                list_del(&trap->list);
 399                spin_unlock_irqrestore(&ibp->rvp.lock, flags);
 400                kfree(trap);
 401                ib_free_send_mad(send_buf);
 402                return;
 403        }
 404
 405        trap->in_use = 0;
 406        spin_unlock_irqrestore(&ibp->rvp.lock, flags);
 407
 408        if (ib_post_send_mad(send_buf, NULL))
 409                ib_free_send_mad(send_buf);
 410}
 411
 412void hfi1_handle_trap_timer(struct timer_list *t)
 413{
 414        struct hfi1_ibport *ibp = from_timer(ibp, t, rvp.trap_timer);
 415        struct trap_node *trap = NULL;
 416        unsigned long flags;
 417        int i;
 418
 419        /* Find the trap with the highest priority */
 420        spin_lock_irqsave(&ibp->rvp.lock, flags);
 421        for (i = 0; !trap && i < RVT_MAX_TRAP_LISTS; i++) {
 422                trap = list_first_entry_or_null(&ibp->rvp.trap_lists[i].list,
 423                                                struct trap_node, list);
 424        }
 425        spin_unlock_irqrestore(&ibp->rvp.lock, flags);
 426
 427        if (trap)
 428                send_trap(ibp, trap);
 429}
 430
 431static struct trap_node *create_trap_node(u8 type, __be16 trap_num, u32 lid)
 432{
 433        struct trap_node *trap;
 434
 435        trap = kzalloc(sizeof(*trap), GFP_ATOMIC);
 436        if (!trap)
 437                return NULL;
 438
 439        INIT_LIST_HEAD(&trap->list);
 440        trap->data.generic_type = type;
 441        trap->data.prod_type_lsb = IB_NOTICE_PROD_CA;
 442        trap->data.trap_num = trap_num;
 443        trap->data.issuer_lid = cpu_to_be32(lid);
 444
 445        return trap;
 446}
 447
 448/*
 449 * Send a bad P_Key trap (ch. 14.3.8).
 450 */
 451void hfi1_bad_pkey(struct hfi1_ibport *ibp, u32 key, u32 sl,
 452                   u32 qp1, u32 qp2, u32 lid1, u32 lid2)
 453{
 454        struct trap_node *trap;
 455        u32 lid = ppd_from_ibp(ibp)->lid;
 456
 457        ibp->rvp.n_pkt_drops++;
 458        ibp->rvp.pkey_violations++;
 459
 460        trap = create_trap_node(IB_NOTICE_TYPE_SECURITY, OPA_TRAP_BAD_P_KEY,
 461                                lid);
 462        if (!trap)
 463                return;
 464
 465        /* Send violation trap */
 466        trap->data.ntc_257_258.lid1 = cpu_to_be32(lid1);
 467        trap->data.ntc_257_258.lid2 = cpu_to_be32(lid2);
 468        trap->data.ntc_257_258.key = cpu_to_be32(key);
 469        trap->data.ntc_257_258.sl = sl << 3;
 470        trap->data.ntc_257_258.qp1 = cpu_to_be32(qp1);
 471        trap->data.ntc_257_258.qp2 = cpu_to_be32(qp2);
 472
 473        trap->len = sizeof(trap->data);
 474        send_trap(ibp, trap);
 475}
 476
 477/*
 478 * Send a bad M_Key trap (ch. 14.3.9).
 479 */
 480static void bad_mkey(struct hfi1_ibport *ibp, struct ib_mad_hdr *mad,
 481                     __be64 mkey, __be32 dr_slid, u8 return_path[], u8 hop_cnt)
 482{
 483        struct trap_node *trap;
 484        u32 lid = ppd_from_ibp(ibp)->lid;
 485
 486        trap = create_trap_node(IB_NOTICE_TYPE_SECURITY, OPA_TRAP_BAD_M_KEY,
 487                                lid);
 488        if (!trap)
 489                return;
 490
 491        /* Send violation trap */
 492        trap->data.ntc_256.lid = trap->data.issuer_lid;
 493        trap->data.ntc_256.method = mad->method;
 494        trap->data.ntc_256.attr_id = mad->attr_id;
 495        trap->data.ntc_256.attr_mod = mad->attr_mod;
 496        trap->data.ntc_256.mkey = mkey;
 497        if (mad->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
 498                trap->data.ntc_256.dr_slid = dr_slid;
 499                trap->data.ntc_256.dr_trunc_hop = IB_NOTICE_TRAP_DR_NOTICE;
 500                if (hop_cnt > ARRAY_SIZE(trap->data.ntc_256.dr_rtn_path)) {
 501                        trap->data.ntc_256.dr_trunc_hop |=
 502                                IB_NOTICE_TRAP_DR_TRUNC;
 503                        hop_cnt = ARRAY_SIZE(trap->data.ntc_256.dr_rtn_path);
 504                }
 505                trap->data.ntc_256.dr_trunc_hop |= hop_cnt;
 506                memcpy(trap->data.ntc_256.dr_rtn_path, return_path,
 507                       hop_cnt);
 508        }
 509
 510        trap->len = sizeof(trap->data);
 511
 512        send_trap(ibp, trap);
 513}
 514
 515/*
 516 * Send a Port Capability Mask Changed trap (ch. 14.3.11).
 517 */
 518void hfi1_cap_mask_chg(struct rvt_dev_info *rdi, u8 port_num)
 519{
 520        struct trap_node *trap;
 521        struct hfi1_ibdev *verbs_dev = dev_from_rdi(rdi);
 522        struct hfi1_devdata *dd = dd_from_dev(verbs_dev);
 523        struct hfi1_ibport *ibp = &dd->pport[port_num - 1].ibport_data;
 524        u32 lid = ppd_from_ibp(ibp)->lid;
 525
 526        trap = create_trap_node(IB_NOTICE_TYPE_INFO,
 527                                OPA_TRAP_CHANGE_CAPABILITY,
 528                                lid);
 529        if (!trap)
 530                return;
 531
 532        trap->data.ntc_144.lid = trap->data.issuer_lid;
 533        trap->data.ntc_144.new_cap_mask = cpu_to_be32(ibp->rvp.port_cap_flags);
 534        trap->data.ntc_144.cap_mask3 = cpu_to_be16(ibp->rvp.port_cap3_flags);
 535
 536        trap->len = sizeof(trap->data);
 537        send_trap(ibp, trap);
 538}
 539
 540/*
 541 * Send a System Image GUID Changed trap (ch. 14.3.12).
 542 */
 543void hfi1_sys_guid_chg(struct hfi1_ibport *ibp)
 544{
 545        struct trap_node *trap;
 546        u32 lid = ppd_from_ibp(ibp)->lid;
 547
 548        trap = create_trap_node(IB_NOTICE_TYPE_INFO, OPA_TRAP_CHANGE_SYSGUID,
 549                                lid);
 550        if (!trap)
 551                return;
 552
 553        trap->data.ntc_145.new_sys_guid = ib_hfi1_sys_image_guid;
 554        trap->data.ntc_145.lid = trap->data.issuer_lid;
 555
 556        trap->len = sizeof(trap->data);
 557        send_trap(ibp, trap);
 558}
 559
 560/*
 561 * Send a Node Description Changed trap (ch. 14.3.13).
 562 */
 563void hfi1_node_desc_chg(struct hfi1_ibport *ibp)
 564{
 565        struct trap_node *trap;
 566        u32 lid = ppd_from_ibp(ibp)->lid;
 567
 568        trap = create_trap_node(IB_NOTICE_TYPE_INFO,
 569                                OPA_TRAP_CHANGE_CAPABILITY,
 570                                lid);
 571        if (!trap)
 572                return;
 573
 574        trap->data.ntc_144.lid = trap->data.issuer_lid;
 575        trap->data.ntc_144.change_flags =
 576                cpu_to_be16(OPA_NOTICE_TRAP_NODE_DESC_CHG);
 577
 578        trap->len = sizeof(trap->data);
 579        send_trap(ibp, trap);
 580}
 581
 582static int __subn_get_opa_nodedesc(struct opa_smp *smp, u32 am,
 583                                   u8 *data, struct ib_device *ibdev,
 584                                   u8 port, u32 *resp_len, u32 max_len)
 585{
 586        struct opa_node_description *nd;
 587
 588        if (am || smp_length_check(sizeof(*nd), max_len)) {
 589                smp->status |= IB_SMP_INVALID_FIELD;
 590                return reply((struct ib_mad_hdr *)smp);
 591        }
 592
 593        nd = (struct opa_node_description *)data;
 594
 595        memcpy(nd->data, ibdev->node_desc, sizeof(nd->data));
 596
 597        if (resp_len)
 598                *resp_len += sizeof(*nd);
 599
 600        return reply((struct ib_mad_hdr *)smp);
 601}
 602
 603static int __subn_get_opa_nodeinfo(struct opa_smp *smp, u32 am, u8 *data,
 604                                   struct ib_device *ibdev, u8 port,
 605                                   u32 *resp_len, u32 max_len)
 606{
 607        struct opa_node_info *ni;
 608        struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
 609        unsigned pidx = port - 1; /* IB number port from 1, hw from 0 */
 610
 611        ni = (struct opa_node_info *)data;
 612
 613        /* GUID 0 is illegal */
 614        if (am || pidx >= dd->num_pports || ibdev->node_guid == 0 ||
 615            smp_length_check(sizeof(*ni), max_len) ||
 616            get_sguid(to_iport(ibdev, port), HFI1_PORT_GUID_INDEX) == 0) {
 617                smp->status |= IB_SMP_INVALID_FIELD;
 618                return reply((struct ib_mad_hdr *)smp);
 619        }
 620
 621        ni->port_guid = get_sguid(to_iport(ibdev, port), HFI1_PORT_GUID_INDEX);
 622        ni->base_version = OPA_MGMT_BASE_VERSION;
 623        ni->class_version = OPA_SM_CLASS_VERSION;
 624        ni->node_type = 1;     /* channel adapter */
 625        ni->num_ports = ibdev->phys_port_cnt;
 626        /* This is already in network order */
 627        ni->system_image_guid = ib_hfi1_sys_image_guid;
 628        ni->node_guid = ibdev->node_guid;
 629        ni->partition_cap = cpu_to_be16(hfi1_get_npkeys(dd));
 630        ni->device_id = cpu_to_be16(dd->pcidev->device);
 631        ni->revision = cpu_to_be32(dd->minrev);
 632        ni->local_port_num = port;
 633        ni->vendor_id[0] = dd->oui1;
 634        ni->vendor_id[1] = dd->oui2;
 635        ni->vendor_id[2] = dd->oui3;
 636
 637        if (resp_len)
 638                *resp_len += sizeof(*ni);
 639
 640        return reply((struct ib_mad_hdr *)smp);
 641}
 642
 643static int subn_get_nodeinfo(struct ib_smp *smp, struct ib_device *ibdev,
 644                             u8 port)
 645{
 646        struct ib_node_info *nip = (struct ib_node_info *)&smp->data;
 647        struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
 648        unsigned pidx = port - 1; /* IB number port from 1, hw from 0 */
 649
 650        /* GUID 0 is illegal */
 651        if (smp->attr_mod || pidx >= dd->num_pports ||
 652            ibdev->node_guid == 0 ||
 653            get_sguid(to_iport(ibdev, port), HFI1_PORT_GUID_INDEX) == 0) {
 654                smp->status |= IB_SMP_INVALID_FIELD;
 655                return reply((struct ib_mad_hdr *)smp);
 656        }
 657
 658        nip->port_guid = get_sguid(to_iport(ibdev, port), HFI1_PORT_GUID_INDEX);
 659        nip->base_version = OPA_MGMT_BASE_VERSION;
 660        nip->class_version = OPA_SM_CLASS_VERSION;
 661        nip->node_type = 1;     /* channel adapter */
 662        nip->num_ports = ibdev->phys_port_cnt;
 663        /* This is already in network order */
 664        nip->sys_guid = ib_hfi1_sys_image_guid;
 665        nip->node_guid = ibdev->node_guid;
 666        nip->partition_cap = cpu_to_be16(hfi1_get_npkeys(dd));
 667        nip->device_id = cpu_to_be16(dd->pcidev->device);
 668        nip->revision = cpu_to_be32(dd->minrev);
 669        nip->local_port_num = port;
 670        nip->vendor_id[0] = dd->oui1;
 671        nip->vendor_id[1] = dd->oui2;
 672        nip->vendor_id[2] = dd->oui3;
 673
 674        return reply((struct ib_mad_hdr *)smp);
 675}
 676
 677static void set_link_width_enabled(struct hfi1_pportdata *ppd, u32 w)
 678{
 679        (void)hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_LWID_ENB, w);
 680}
 681
 682static void set_link_width_downgrade_enabled(struct hfi1_pportdata *ppd, u32 w)
 683{
 684        (void)hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_LWID_DG_ENB, w);
 685}
 686
 687static void set_link_speed_enabled(struct hfi1_pportdata *ppd, u32 s)
 688{
 689        (void)hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_SPD_ENB, s);
 690}
 691
 692static int check_mkey(struct hfi1_ibport *ibp, struct ib_mad_hdr *mad,
 693                      int mad_flags, __be64 mkey, __be32 dr_slid,
 694                      u8 return_path[], u8 hop_cnt)
 695{
 696        int valid_mkey = 0;
 697        int ret = 0;
 698
 699        /* Is the mkey in the process of expiring? */
 700        if (ibp->rvp.mkey_lease_timeout &&
 701            time_after_eq(jiffies, ibp->rvp.mkey_lease_timeout)) {
 702                /* Clear timeout and mkey protection field. */
 703                ibp->rvp.mkey_lease_timeout = 0;
 704                ibp->rvp.mkeyprot = 0;
 705        }
 706
 707        if ((mad_flags & IB_MAD_IGNORE_MKEY) ||  ibp->rvp.mkey == 0 ||
 708            ibp->rvp.mkey == mkey)
 709                valid_mkey = 1;
 710
 711        /* Unset lease timeout on any valid Get/Set/TrapRepress */
 712        if (valid_mkey && ibp->rvp.mkey_lease_timeout &&
 713            (mad->method == IB_MGMT_METHOD_GET ||
 714             mad->method == IB_MGMT_METHOD_SET ||
 715             mad->method == IB_MGMT_METHOD_TRAP_REPRESS))
 716                ibp->rvp.mkey_lease_timeout = 0;
 717
 718        if (!valid_mkey) {
 719                switch (mad->method) {
 720                case IB_MGMT_METHOD_GET:
 721                        /* Bad mkey not a violation below level 2 */
 722                        if (ibp->rvp.mkeyprot < 2)
 723                                break;
 724                        /* fall through */
 725                case IB_MGMT_METHOD_SET:
 726                case IB_MGMT_METHOD_TRAP_REPRESS:
 727                        if (ibp->rvp.mkey_violations != 0xFFFF)
 728                                ++ibp->rvp.mkey_violations;
 729                        if (!ibp->rvp.mkey_lease_timeout &&
 730                            ibp->rvp.mkey_lease_period)
 731                                ibp->rvp.mkey_lease_timeout = jiffies +
 732                                        ibp->rvp.mkey_lease_period * HZ;
 733                        /* Generate a trap notice. */
 734                        bad_mkey(ibp, mad, mkey, dr_slid, return_path,
 735                                 hop_cnt);
 736                        ret = 1;
 737                }
 738        }
 739
 740        return ret;
 741}
 742
 743/*
 744 * The SMA caches reads from LCB registers in case the LCB is unavailable.
 745 * (The LCB is unavailable in certain link states, for example.)
 746 */
 747struct lcb_datum {
 748        u32 off;
 749        u64 val;
 750};
 751
 752static struct lcb_datum lcb_cache[] = {
 753        { DC_LCB_STS_ROUND_TRIP_LTP_CNT, 0 },
 754};
 755
 756static int write_lcb_cache(u32 off, u64 val)
 757{
 758        int i;
 759
 760        for (i = 0; i < ARRAY_SIZE(lcb_cache); i++) {
 761                if (lcb_cache[i].off == off) {
 762                        lcb_cache[i].val = val;
 763                        return 0;
 764                }
 765        }
 766
 767        pr_warn("%s bad offset 0x%x\n", __func__, off);
 768        return -1;
 769}
 770
 771static int read_lcb_cache(u32 off, u64 *val)
 772{
 773        int i;
 774
 775        for (i = 0; i < ARRAY_SIZE(lcb_cache); i++) {
 776                if (lcb_cache[i].off == off) {
 777                        *val = lcb_cache[i].val;
 778                        return 0;
 779                }
 780        }
 781
 782        pr_warn("%s bad offset 0x%x\n", __func__, off);
 783        return -1;
 784}
 785
 786void read_ltp_rtt(struct hfi1_devdata *dd)
 787{
 788        u64 reg;
 789
 790        if (read_lcb_csr(dd, DC_LCB_STS_ROUND_TRIP_LTP_CNT, &reg))
 791                dd_dev_err(dd, "%s: unable to read LTP RTT\n", __func__);
 792        else
 793                write_lcb_cache(DC_LCB_STS_ROUND_TRIP_LTP_CNT, reg);
 794}
 795
 796static int __subn_get_opa_portinfo(struct opa_smp *smp, u32 am, u8 *data,
 797                                   struct ib_device *ibdev, u8 port,
 798                                   u32 *resp_len, u32 max_len)
 799{
 800        int i;
 801        struct hfi1_devdata *dd;
 802        struct hfi1_pportdata *ppd;
 803        struct hfi1_ibport *ibp;
 804        struct opa_port_info *pi = (struct opa_port_info *)data;
 805        u8 mtu;
 806        u8 credit_rate;
 807        u8 is_beaconing_active;
 808        u32 state;
 809        u32 num_ports = OPA_AM_NPORT(am);
 810        u32 start_of_sm_config = OPA_AM_START_SM_CFG(am);
 811        u32 buffer_units;
 812        u64 tmp = 0;
 813
 814        if (num_ports != 1 || smp_length_check(sizeof(*pi), max_len)) {
 815                smp->status |= IB_SMP_INVALID_FIELD;
 816                return reply((struct ib_mad_hdr *)smp);
 817        }
 818
 819        dd = dd_from_ibdev(ibdev);
 820        /* IB numbers ports from 1, hw from 0 */
 821        ppd = dd->pport + (port - 1);
 822        ibp = &ppd->ibport_data;
 823
 824        if (ppd->vls_supported / 2 > ARRAY_SIZE(pi->neigh_mtu.pvlx_to_mtu) ||
 825            ppd->vls_supported > ARRAY_SIZE(dd->vld)) {
 826                smp->status |= IB_SMP_INVALID_FIELD;
 827                return reply((struct ib_mad_hdr *)smp);
 828        }
 829
 830        pi->lid = cpu_to_be32(ppd->lid);
 831
 832        /* Only return the mkey if the protection field allows it. */
 833        if (!(smp->method == IB_MGMT_METHOD_GET &&
 834              ibp->rvp.mkey != smp->mkey &&
 835              ibp->rvp.mkeyprot == 1))
 836                pi->mkey = ibp->rvp.mkey;
 837
 838        pi->subnet_prefix = ibp->rvp.gid_prefix;
 839        pi->sm_lid = cpu_to_be32(ibp->rvp.sm_lid);
 840        pi->ib_cap_mask = cpu_to_be32(ibp->rvp.port_cap_flags);
 841        pi->mkey_lease_period = cpu_to_be16(ibp->rvp.mkey_lease_period);
 842        pi->sm_trap_qp = cpu_to_be32(ppd->sm_trap_qp);
 843        pi->sa_qp = cpu_to_be32(ppd->sa_qp);
 844
 845        pi->link_width.enabled = cpu_to_be16(ppd->link_width_enabled);
 846        pi->link_width.supported = cpu_to_be16(ppd->link_width_supported);
 847        pi->link_width.active = cpu_to_be16(ppd->link_width_active);
 848
 849        pi->link_width_downgrade.supported =
 850                        cpu_to_be16(ppd->link_width_downgrade_supported);
 851        pi->link_width_downgrade.enabled =
 852                        cpu_to_be16(ppd->link_width_downgrade_enabled);
 853        pi->link_width_downgrade.tx_active =
 854                        cpu_to_be16(ppd->link_width_downgrade_tx_active);
 855        pi->link_width_downgrade.rx_active =
 856                        cpu_to_be16(ppd->link_width_downgrade_rx_active);
 857
 858        pi->link_speed.supported = cpu_to_be16(ppd->link_speed_supported);
 859        pi->link_speed.active = cpu_to_be16(ppd->link_speed_active);
 860        pi->link_speed.enabled = cpu_to_be16(ppd->link_speed_enabled);
 861
 862        state = driver_lstate(ppd);
 863
 864        if (start_of_sm_config && (state == IB_PORT_INIT))
 865                ppd->is_sm_config_started = 1;
 866
 867        pi->port_phys_conf = (ppd->port_type & 0xf);
 868
 869        pi->port_states.ledenable_offlinereason = ppd->neighbor_normal << 4;
 870        pi->port_states.ledenable_offlinereason |=
 871                ppd->is_sm_config_started << 5;
 872        /*
 873         * This pairs with the memory barrier in hfi1_start_led_override to
 874         * ensure that we read the correct state of LED beaconing represented
 875         * by led_override_timer_active
 876         */
 877        smp_rmb();
 878        is_beaconing_active = !!atomic_read(&ppd->led_override_timer_active);
 879        pi->port_states.ledenable_offlinereason |= is_beaconing_active << 6;
 880        pi->port_states.ledenable_offlinereason |=
 881                ppd->offline_disabled_reason;
 882
 883        pi->port_states.portphysstate_portstate =
 884                (driver_pstate(ppd) << 4) | state;
 885
 886        pi->mkeyprotect_lmc = (ibp->rvp.mkeyprot << 6) | ppd->lmc;
 887
 888        memset(pi->neigh_mtu.pvlx_to_mtu, 0, sizeof(pi->neigh_mtu.pvlx_to_mtu));
 889        for (i = 0; i < ppd->vls_supported; i++) {
 890                mtu = mtu_to_enum(dd->vld[i].mtu, HFI1_DEFAULT_ACTIVE_MTU);
 891                if ((i % 2) == 0)
 892                        pi->neigh_mtu.pvlx_to_mtu[i / 2] |= (mtu << 4);
 893                else
 894                        pi->neigh_mtu.pvlx_to_mtu[i / 2] |= mtu;
 895        }
 896        /* don't forget VL 15 */
 897        mtu = mtu_to_enum(dd->vld[15].mtu, 2048);
 898        pi->neigh_mtu.pvlx_to_mtu[15 / 2] |= mtu;
 899        pi->smsl = ibp->rvp.sm_sl & OPA_PI_MASK_SMSL;
 900        pi->operational_vls = hfi1_get_ib_cfg(ppd, HFI1_IB_CFG_OP_VLS);
 901        pi->partenforce_filterraw |=
 902                (ppd->linkinit_reason & OPA_PI_MASK_LINKINIT_REASON);
 903        if (ppd->part_enforce & HFI1_PART_ENFORCE_IN)
 904                pi->partenforce_filterraw |= OPA_PI_MASK_PARTITION_ENFORCE_IN;
 905        if (ppd->part_enforce & HFI1_PART_ENFORCE_OUT)
 906                pi->partenforce_filterraw |= OPA_PI_MASK_PARTITION_ENFORCE_OUT;
 907        pi->mkey_violations = cpu_to_be16(ibp->rvp.mkey_violations);
 908        /* P_KeyViolations are counted by hardware. */
 909        pi->pkey_violations = cpu_to_be16(ibp->rvp.pkey_violations);
 910        pi->qkey_violations = cpu_to_be16(ibp->rvp.qkey_violations);
 911
 912        pi->vl.cap = ppd->vls_supported;
 913        pi->vl.high_limit = cpu_to_be16(ibp->rvp.vl_high_limit);
 914        pi->vl.arb_high_cap = (u8)hfi1_get_ib_cfg(ppd, HFI1_IB_CFG_VL_HIGH_CAP);
 915        pi->vl.arb_low_cap = (u8)hfi1_get_ib_cfg(ppd, HFI1_IB_CFG_VL_LOW_CAP);
 916
 917        pi->clientrereg_subnettimeout = ibp->rvp.subnet_timeout;
 918
 919        pi->port_link_mode  = cpu_to_be16(OPA_PORT_LINK_MODE_OPA << 10 |
 920                                          OPA_PORT_LINK_MODE_OPA << 5 |
 921                                          OPA_PORT_LINK_MODE_OPA);
 922
 923        pi->port_ltp_crc_mode = cpu_to_be16(ppd->port_ltp_crc_mode);
 924
 925        pi->port_mode = cpu_to_be16(
 926                                ppd->is_active_optimize_enabled ?
 927                                        OPA_PI_MASK_PORT_ACTIVE_OPTOMIZE : 0);
 928
 929        pi->port_packet_format.supported =
 930                cpu_to_be16(OPA_PORT_PACKET_FORMAT_9B |
 931                            OPA_PORT_PACKET_FORMAT_16B);
 932        pi->port_packet_format.enabled =
 933                cpu_to_be16(OPA_PORT_PACKET_FORMAT_9B |
 934                            OPA_PORT_PACKET_FORMAT_16B);
 935
 936        /* flit_control.interleave is (OPA V1, version .76):
 937         * bits         use
 938         * ----         ---
 939         * 2            res
 940         * 2            DistanceSupported
 941         * 2            DistanceEnabled
 942         * 5            MaxNextLevelTxEnabled
 943         * 5            MaxNestLevelRxSupported
 944         *
 945         * HFI supports only "distance mode 1" (see OPA V1, version .76,
 946         * section 9.6.2), so set DistanceSupported, DistanceEnabled
 947         * to 0x1.
 948         */
 949        pi->flit_control.interleave = cpu_to_be16(0x1400);
 950
 951        pi->link_down_reason = ppd->local_link_down_reason.sma;
 952        pi->neigh_link_down_reason = ppd->neigh_link_down_reason.sma;
 953        pi->port_error_action = cpu_to_be32(ppd->port_error_action);
 954        pi->mtucap = mtu_to_enum(hfi1_max_mtu, IB_MTU_4096);
 955
 956        /* 32.768 usec. response time (guessing) */
 957        pi->resptimevalue = 3;
 958
 959        pi->local_port_num = port;
 960
 961        /* buffer info for FM */
 962        pi->overall_buffer_space = cpu_to_be16(dd->link_credits);
 963
 964        pi->neigh_node_guid = cpu_to_be64(ppd->neighbor_guid);
 965        pi->neigh_port_num = ppd->neighbor_port_number;
 966        pi->port_neigh_mode =
 967                (ppd->neighbor_type & OPA_PI_MASK_NEIGH_NODE_TYPE) |
 968                (ppd->mgmt_allowed ? OPA_PI_MASK_NEIGH_MGMT_ALLOWED : 0) |
 969                (ppd->neighbor_fm_security ?
 970                        OPA_PI_MASK_NEIGH_FW_AUTH_BYPASS : 0);
 971
 972        /* HFIs shall always return VL15 credits to their
 973         * neighbor in a timely manner, without any credit return pacing.
 974         */
 975        credit_rate = 0;
 976        buffer_units  = (dd->vau) & OPA_PI_MASK_BUF_UNIT_BUF_ALLOC;
 977        buffer_units |= (dd->vcu << 3) & OPA_PI_MASK_BUF_UNIT_CREDIT_ACK;
 978        buffer_units |= (credit_rate << 6) &
 979                                OPA_PI_MASK_BUF_UNIT_VL15_CREDIT_RATE;
 980        buffer_units |= (dd->vl15_init << 11) & OPA_PI_MASK_BUF_UNIT_VL15_INIT;
 981        pi->buffer_units = cpu_to_be32(buffer_units);
 982
 983        pi->opa_cap_mask = cpu_to_be16(ibp->rvp.port_cap3_flags);
 984        pi->collectivemask_multicastmask = ((OPA_COLLECTIVE_NR & 0x7)
 985                                            << 3 | (OPA_MCAST_NR & 0x7));
 986
 987        /* HFI supports a replay buffer 128 LTPs in size */
 988        pi->replay_depth.buffer = 0x80;
 989        /* read the cached value of DC_LCB_STS_ROUND_TRIP_LTP_CNT */
 990        read_lcb_cache(DC_LCB_STS_ROUND_TRIP_LTP_CNT, &tmp);
 991
 992        /*
 993         * this counter is 16 bits wide, but the replay_depth.wire
 994         * variable is only 8 bits
 995         */
 996        if (tmp > 0xff)
 997                tmp = 0xff;
 998        pi->replay_depth.wire = tmp;
 999
1000        if (resp_len)
1001                *resp_len += sizeof(struct opa_port_info);
1002
1003        return reply((struct ib_mad_hdr *)smp);
1004}
1005
1006/**
1007 * get_pkeys - return the PKEY table
1008 * @dd: the hfi1_ib device
1009 * @port: the IB port number
1010 * @pkeys: the pkey table is placed here
1011 */
1012static int get_pkeys(struct hfi1_devdata *dd, u8 port, u16 *pkeys)
1013{
1014        struct hfi1_pportdata *ppd = dd->pport + port - 1;
1015
1016        memcpy(pkeys, ppd->pkeys, sizeof(ppd->pkeys));
1017
1018        return 0;
1019}
1020
1021static int __subn_get_opa_pkeytable(struct opa_smp *smp, u32 am, u8 *data,
1022                                    struct ib_device *ibdev, u8 port,
1023                                    u32 *resp_len, u32 max_len)
1024{
1025        struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
1026        u32 n_blocks_req = OPA_AM_NBLK(am);
1027        u32 start_block = am & 0x7ff;
1028        __be16 *p;
1029        u16 *q;
1030        int i;
1031        u16 n_blocks_avail;
1032        unsigned npkeys = hfi1_get_npkeys(dd);
1033        size_t size;
1034
1035        if (n_blocks_req == 0) {
1036                pr_warn("OPA Get PKey AM Invalid : P = %d; B = 0x%x; N = 0x%x\n",
1037                        port, start_block, n_blocks_req);
1038                smp->status |= IB_SMP_INVALID_FIELD;
1039                return reply((struct ib_mad_hdr *)smp);
1040        }
1041
1042        n_blocks_avail = (u16)(npkeys / OPA_PARTITION_TABLE_BLK_SIZE) + 1;
1043
1044        size = (n_blocks_req * OPA_PARTITION_TABLE_BLK_SIZE) * sizeof(u16);
1045
1046        if (smp_length_check(size, max_len)) {
1047                smp->status |= IB_SMP_INVALID_FIELD;
1048                return reply((struct ib_mad_hdr *)smp);
1049        }
1050
1051        if (start_block + n_blocks_req > n_blocks_avail ||
1052            n_blocks_req > OPA_NUM_PKEY_BLOCKS_PER_SMP) {
1053                pr_warn("OPA Get PKey AM Invalid : s 0x%x; req 0x%x; "
1054                        "avail 0x%x; blk/smp 0x%lx\n",
1055                        start_block, n_blocks_req, n_blocks_avail,
1056                        OPA_NUM_PKEY_BLOCKS_PER_SMP);
1057                smp->status |= IB_SMP_INVALID_FIELD;
1058                return reply((struct ib_mad_hdr *)smp);
1059        }
1060
1061        p = (__be16 *)data;
1062        q = (u16 *)data;
1063        /* get the real pkeys if we are requesting the first block */
1064        if (start_block == 0) {
1065                get_pkeys(dd, port, q);
1066                for (i = 0; i < npkeys; i++)
1067                        p[i] = cpu_to_be16(q[i]);
1068                if (resp_len)
1069                        *resp_len += size;
1070        } else {
1071                smp->status |= IB_SMP_INVALID_FIELD;
1072        }
1073        return reply((struct ib_mad_hdr *)smp);
1074}
1075
1076enum {
1077        HFI_TRANSITION_DISALLOWED,
1078        HFI_TRANSITION_IGNORED,
1079        HFI_TRANSITION_ALLOWED,
1080        HFI_TRANSITION_UNDEFINED,
1081};
1082
1083/*
1084 * Use shortened names to improve readability of
1085 * {logical,physical}_state_transitions
1086 */
1087enum {
1088        __D = HFI_TRANSITION_DISALLOWED,
1089        __I = HFI_TRANSITION_IGNORED,
1090        __A = HFI_TRANSITION_ALLOWED,
1091        __U = HFI_TRANSITION_UNDEFINED,
1092};
1093
1094/*
1095 * IB_PORTPHYSSTATE_POLLING (2) through OPA_PORTPHYSSTATE_MAX (11) are
1096 * represented in physical_state_transitions.
1097 */
1098#define __N_PHYSTATES (OPA_PORTPHYSSTATE_MAX - IB_PORTPHYSSTATE_POLLING + 1)
1099
1100/*
1101 * Within physical_state_transitions, rows represent "old" states,
1102 * columns "new" states, and physical_state_transitions.allowed[old][new]
1103 * indicates if the transition from old state to new state is legal (see
1104 * OPAg1v1, Table 6-4).
1105 */
1106static const struct {
1107        u8 allowed[__N_PHYSTATES][__N_PHYSTATES];
1108} physical_state_transitions = {
1109        {
1110                /* 2    3    4    5    6    7    8    9   10   11 */
1111        /* 2 */ { __A, __A, __D, __D, __D, __D, __D, __D, __D, __D },
1112        /* 3 */ { __A, __I, __D, __D, __D, __D, __D, __D, __D, __A },
1113        /* 4 */ { __U, __U, __U, __U, __U, __U, __U, __U, __U, __U },
1114        /* 5 */ { __A, __A, __D, __I, __D, __D, __D, __D, __D, __D },
1115        /* 6 */ { __U, __U, __U, __U, __U, __U, __U, __U, __U, __U },
1116        /* 7 */ { __D, __A, __D, __D, __D, __I, __D, __D, __D, __D },
1117        /* 8 */ { __U, __U, __U, __U, __U, __U, __U, __U, __U, __U },
1118        /* 9 */ { __I, __A, __D, __D, __D, __D, __D, __I, __D, __D },
1119        /*10 */ { __U, __U, __U, __U, __U, __U, __U, __U, __U, __U },
1120        /*11 */ { __D, __A, __D, __D, __D, __D, __D, __D, __D, __I },
1121        }
1122};
1123
1124/*
1125 * IB_PORT_DOWN (1) through IB_PORT_ACTIVE_DEFER (5) are represented
1126 * logical_state_transitions
1127 */
1128
1129#define __N_LOGICAL_STATES (IB_PORT_ACTIVE_DEFER - IB_PORT_DOWN + 1)
1130
1131/*
1132 * Within logical_state_transitions rows represent "old" states,
1133 * columns "new" states, and logical_state_transitions.allowed[old][new]
1134 * indicates if the transition from old state to new state is legal (see
1135 * OPAg1v1, Table 9-12).
1136 */
1137static const struct {
1138        u8 allowed[__N_LOGICAL_STATES][__N_LOGICAL_STATES];
1139} logical_state_transitions = {
1140        {
1141                /* 1    2    3    4    5 */
1142        /* 1 */ { __I, __D, __D, __D, __U},
1143        /* 2 */ { __D, __I, __A, __D, __U},
1144        /* 3 */ { __D, __D, __I, __A, __U},
1145        /* 4 */ { __D, __D, __I, __I, __U},
1146        /* 5 */ { __U, __U, __U, __U, __U},
1147        }
1148};
1149
1150static int logical_transition_allowed(int old, int new)
1151{
1152        if (old < IB_PORT_NOP || old > IB_PORT_ACTIVE_DEFER ||
1153            new < IB_PORT_NOP || new > IB_PORT_ACTIVE_DEFER) {
1154                pr_warn("invalid logical state(s) (old %d new %d)\n",
1155                        old, new);
1156                return HFI_TRANSITION_UNDEFINED;
1157        }
1158
1159        if (new == IB_PORT_NOP)
1160                return HFI_TRANSITION_ALLOWED; /* always allowed */
1161
1162        /* adjust states for indexing into logical_state_transitions */
1163        old -= IB_PORT_DOWN;
1164        new -= IB_PORT_DOWN;
1165
1166        if (old < 0 || new < 0)
1167                return HFI_TRANSITION_UNDEFINED;
1168        return logical_state_transitions.allowed[old][new];
1169}
1170
1171static int physical_transition_allowed(int old, int new)
1172{
1173        if (old < IB_PORTPHYSSTATE_NOP || old > OPA_PORTPHYSSTATE_MAX ||
1174            new < IB_PORTPHYSSTATE_NOP || new > OPA_PORTPHYSSTATE_MAX) {
1175                pr_warn("invalid physical state(s) (old %d new %d)\n",
1176                        old, new);
1177                return HFI_TRANSITION_UNDEFINED;
1178        }
1179
1180        if (new == IB_PORTPHYSSTATE_NOP)
1181                return HFI_TRANSITION_ALLOWED; /* always allowed */
1182
1183        /* adjust states for indexing into physical_state_transitions */
1184        old -= IB_PORTPHYSSTATE_POLLING;
1185        new -= IB_PORTPHYSSTATE_POLLING;
1186
1187        if (old < 0 || new < 0)
1188                return HFI_TRANSITION_UNDEFINED;
1189        return physical_state_transitions.allowed[old][new];
1190}
1191
1192static int port_states_transition_allowed(struct hfi1_pportdata *ppd,
1193                                          u32 logical_new, u32 physical_new)
1194{
1195        u32 physical_old = driver_pstate(ppd);
1196        u32 logical_old = driver_lstate(ppd);
1197        int ret, logical_allowed, physical_allowed;
1198
1199        ret = logical_transition_allowed(logical_old, logical_new);
1200        logical_allowed = ret;
1201
1202        if (ret == HFI_TRANSITION_DISALLOWED ||
1203            ret == HFI_TRANSITION_UNDEFINED) {
1204                pr_warn("invalid logical state transition %s -> %s\n",
1205                        opa_lstate_name(logical_old),
1206                        opa_lstate_name(logical_new));
1207                return ret;
1208        }
1209
1210        ret = physical_transition_allowed(physical_old, physical_new);
1211        physical_allowed = ret;
1212
1213        if (ret == HFI_TRANSITION_DISALLOWED ||
1214            ret == HFI_TRANSITION_UNDEFINED) {
1215                pr_warn("invalid physical state transition %s -> %s\n",
1216                        opa_pstate_name(physical_old),
1217                        opa_pstate_name(physical_new));
1218                return ret;
1219        }
1220
1221        if (logical_allowed == HFI_TRANSITION_IGNORED &&
1222            physical_allowed == HFI_TRANSITION_IGNORED)
1223                return HFI_TRANSITION_IGNORED;
1224
1225        /*
1226         * A change request of Physical Port State from
1227         * 'Offline' to 'Polling' should be ignored.
1228         */
1229        if ((physical_old == OPA_PORTPHYSSTATE_OFFLINE) &&
1230            (physical_new == IB_PORTPHYSSTATE_POLLING))
1231                return HFI_TRANSITION_IGNORED;
1232
1233        /*
1234         * Either physical_allowed or logical_allowed is
1235         * HFI_TRANSITION_ALLOWED.
1236         */
1237        return HFI_TRANSITION_ALLOWED;
1238}
1239
1240static int set_port_states(struct hfi1_pportdata *ppd, struct opa_smp *smp,
1241                           u32 logical_state, u32 phys_state, int local_mad)
1242{
1243        struct hfi1_devdata *dd = ppd->dd;
1244        u32 link_state;
1245        int ret;
1246
1247        ret = port_states_transition_allowed(ppd, logical_state, phys_state);
1248        if (ret == HFI_TRANSITION_DISALLOWED ||
1249            ret == HFI_TRANSITION_UNDEFINED) {
1250                /* error message emitted above */
1251                smp->status |= IB_SMP_INVALID_FIELD;
1252                return 0;
1253        }
1254
1255        if (ret == HFI_TRANSITION_IGNORED)
1256                return 0;
1257
1258        if ((phys_state != IB_PORTPHYSSTATE_NOP) &&
1259            !(logical_state == IB_PORT_DOWN ||
1260              logical_state == IB_PORT_NOP)){
1261                pr_warn("SubnSet(OPA_PortInfo) port state invalid: logical_state 0x%x physical_state 0x%x\n",
1262                        logical_state, phys_state);
1263                smp->status |= IB_SMP_INVALID_FIELD;
1264        }
1265
1266        /*
1267         * Logical state changes are summarized in OPAv1g1 spec.,
1268         * Table 9-12; physical state changes are summarized in
1269         * OPAv1g1 spec., Table 6.4.
1270         */
1271        switch (logical_state) {
1272        case IB_PORT_NOP:
1273                if (phys_state == IB_PORTPHYSSTATE_NOP)
1274                        break;
1275                /* FALLTHROUGH */
1276        case IB_PORT_DOWN:
1277                if (phys_state == IB_PORTPHYSSTATE_NOP) {
1278                        link_state = HLS_DN_DOWNDEF;
1279                } else if (phys_state == IB_PORTPHYSSTATE_POLLING) {
1280                        link_state = HLS_DN_POLL;
1281                        set_link_down_reason(ppd, OPA_LINKDOWN_REASON_FM_BOUNCE,
1282                                             0, OPA_LINKDOWN_REASON_FM_BOUNCE);
1283                } else if (phys_state == IB_PORTPHYSSTATE_DISABLED) {
1284                        link_state = HLS_DN_DISABLE;
1285                } else {
1286                        pr_warn("SubnSet(OPA_PortInfo) invalid physical state 0x%x\n",
1287                                phys_state);
1288                        smp->status |= IB_SMP_INVALID_FIELD;
1289                        break;
1290                }
1291
1292                if ((link_state == HLS_DN_POLL ||
1293                     link_state == HLS_DN_DOWNDEF)) {
1294                        /*
1295                         * Going to poll.  No matter what the current state,
1296                         * always move offline first, then tune and start the
1297                         * link.  This correctly handles a FM link bounce and
1298                         * a link enable.  Going offline is a no-op if already
1299                         * offline.
1300                         */
1301                        set_link_state(ppd, HLS_DN_OFFLINE);
1302                        start_link(ppd);
1303                } else {
1304                        set_link_state(ppd, link_state);
1305                }
1306                if (link_state == HLS_DN_DISABLE &&
1307                    (ppd->offline_disabled_reason >
1308                     HFI1_ODR_MASK(OPA_LINKDOWN_REASON_SMA_DISABLED) ||
1309                     ppd->offline_disabled_reason ==
1310                     HFI1_ODR_MASK(OPA_LINKDOWN_REASON_NONE)))
1311                        ppd->offline_disabled_reason =
1312                        HFI1_ODR_MASK(OPA_LINKDOWN_REASON_SMA_DISABLED);
1313                /*
1314                 * Don't send a reply if the response would be sent
1315                 * through the disabled port.
1316                 */
1317                if (link_state == HLS_DN_DISABLE && !local_mad)
1318                        return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
1319                break;
1320        case IB_PORT_ARMED:
1321                ret = set_link_state(ppd, HLS_UP_ARMED);
1322                if (!ret)
1323                        send_idle_sma(dd, SMA_IDLE_ARM);
1324                break;
1325        case IB_PORT_ACTIVE:
1326                if (ppd->neighbor_normal) {
1327                        ret = set_link_state(ppd, HLS_UP_ACTIVE);
1328                        if (ret == 0)
1329                                send_idle_sma(dd, SMA_IDLE_ACTIVE);
1330                } else {
1331                        pr_warn("SubnSet(OPA_PortInfo) Cannot move to Active with NeighborNormal 0\n");
1332                        smp->status |= IB_SMP_INVALID_FIELD;
1333                }
1334                break;
1335        default:
1336                pr_warn("SubnSet(OPA_PortInfo) invalid logical state 0x%x\n",
1337                        logical_state);
1338                smp->status |= IB_SMP_INVALID_FIELD;
1339        }
1340
1341        return 0;
1342}
1343
1344/**
1345 * subn_set_opa_portinfo - set port information
1346 * @smp: the incoming SM packet
1347 * @ibdev: the infiniband device
1348 * @port: the port on the device
1349 *
1350 */
1351static int __subn_set_opa_portinfo(struct opa_smp *smp, u32 am, u8 *data,
1352                                   struct ib_device *ibdev, u8 port,
1353                                   u32 *resp_len, u32 max_len, int local_mad)
1354{
1355        struct opa_port_info *pi = (struct opa_port_info *)data;
1356        struct ib_event event;
1357        struct hfi1_devdata *dd;
1358        struct hfi1_pportdata *ppd;
1359        struct hfi1_ibport *ibp;
1360        u8 clientrereg;
1361        unsigned long flags;
1362        u32 smlid;
1363        u32 lid;
1364        u8 ls_old, ls_new, ps_new;
1365        u8 vls;
1366        u8 msl;
1367        u8 crc_enabled;
1368        u16 lse, lwe, mtu;
1369        u32 num_ports = OPA_AM_NPORT(am);
1370        u32 start_of_sm_config = OPA_AM_START_SM_CFG(am);
1371        int ret, i, invalid = 0, call_set_mtu = 0;
1372        int call_link_downgrade_policy = 0;
1373
1374        if (num_ports != 1 ||
1375            smp_length_check(sizeof(*pi), max_len)) {
1376                smp->status |= IB_SMP_INVALID_FIELD;
1377                return reply((struct ib_mad_hdr *)smp);
1378        }
1379
1380        lid = be32_to_cpu(pi->lid);
1381        if (lid & 0xFF000000) {
1382                pr_warn("OPA_PortInfo lid out of range: %X\n", lid);
1383                smp->status |= IB_SMP_INVALID_FIELD;
1384                goto get_only;
1385        }
1386
1387
1388        smlid = be32_to_cpu(pi->sm_lid);
1389        if (smlid & 0xFF000000) {
1390                pr_warn("OPA_PortInfo SM lid out of range: %X\n", smlid);
1391                smp->status |= IB_SMP_INVALID_FIELD;
1392                goto get_only;
1393        }
1394
1395        clientrereg = (pi->clientrereg_subnettimeout &
1396                        OPA_PI_MASK_CLIENT_REREGISTER);
1397
1398        dd = dd_from_ibdev(ibdev);
1399        /* IB numbers ports from 1, hw from 0 */
1400        ppd = dd->pport + (port - 1);
1401        ibp = &ppd->ibport_data;
1402        event.device = ibdev;
1403        event.element.port_num = port;
1404
1405        ls_old = driver_lstate(ppd);
1406
1407        ibp->rvp.mkey = pi->mkey;
1408        if (ibp->rvp.gid_prefix != pi->subnet_prefix) {
1409                ibp->rvp.gid_prefix = pi->subnet_prefix;
1410                event.event = IB_EVENT_GID_CHANGE;
1411                ib_dispatch_event(&event);
1412        }
1413        ibp->rvp.mkey_lease_period = be16_to_cpu(pi->mkey_lease_period);
1414
1415        /* Must be a valid unicast LID address. */
1416        if ((lid == 0 && ls_old > IB_PORT_INIT) ||
1417             (hfi1_is_16B_mcast(lid))) {
1418                smp->status |= IB_SMP_INVALID_FIELD;
1419                pr_warn("SubnSet(OPA_PortInfo) lid invalid 0x%x\n",
1420                        lid);
1421        } else if (ppd->lid != lid ||
1422                 ppd->lmc != (pi->mkeyprotect_lmc & OPA_PI_MASK_LMC)) {
1423                if (ppd->lid != lid)
1424                        hfi1_set_uevent_bits(ppd, _HFI1_EVENT_LID_CHANGE_BIT);
1425                if (ppd->lmc != (pi->mkeyprotect_lmc & OPA_PI_MASK_LMC))
1426                        hfi1_set_uevent_bits(ppd, _HFI1_EVENT_LMC_CHANGE_BIT);
1427                hfi1_set_lid(ppd, lid, pi->mkeyprotect_lmc & OPA_PI_MASK_LMC);
1428                event.event = IB_EVENT_LID_CHANGE;
1429                ib_dispatch_event(&event);
1430
1431                if (HFI1_PORT_GUID_INDEX + 1 < HFI1_GUIDS_PER_PORT) {
1432                        /* Manufacture GID from LID to support extended
1433                         * addresses
1434                         */
1435                        ppd->guids[HFI1_PORT_GUID_INDEX + 1] =
1436                                be64_to_cpu(OPA_MAKE_ID(lid));
1437                        event.event = IB_EVENT_GID_CHANGE;
1438                        ib_dispatch_event(&event);
1439                }
1440        }
1441
1442        msl = pi->smsl & OPA_PI_MASK_SMSL;
1443        if (pi->partenforce_filterraw & OPA_PI_MASK_LINKINIT_REASON)
1444                ppd->linkinit_reason =
1445                        (pi->partenforce_filterraw &
1446                         OPA_PI_MASK_LINKINIT_REASON);
1447
1448        /* Must be a valid unicast LID address. */
1449        if ((smlid == 0 && ls_old > IB_PORT_INIT) ||
1450             (hfi1_is_16B_mcast(smlid))) {
1451                smp->status |= IB_SMP_INVALID_FIELD;
1452                pr_warn("SubnSet(OPA_PortInfo) smlid invalid 0x%x\n", smlid);
1453        } else if (smlid != ibp->rvp.sm_lid || msl != ibp->rvp.sm_sl) {
1454                pr_warn("SubnSet(OPA_PortInfo) smlid 0x%x\n", smlid);
1455                spin_lock_irqsave(&ibp->rvp.lock, flags);
1456                if (ibp->rvp.sm_ah) {
1457                        if (smlid != ibp->rvp.sm_lid)
1458                                hfi1_modify_qp0_ah(ibp, ibp->rvp.sm_ah, smlid);
1459                        if (msl != ibp->rvp.sm_sl)
1460                                rdma_ah_set_sl(&ibp->rvp.sm_ah->attr, msl);
1461                }
1462                spin_unlock_irqrestore(&ibp->rvp.lock, flags);
1463                if (smlid != ibp->rvp.sm_lid)
1464                        ibp->rvp.sm_lid = smlid;
1465                if (msl != ibp->rvp.sm_sl)
1466                        ibp->rvp.sm_sl = msl;
1467                event.event = IB_EVENT_SM_CHANGE;
1468                ib_dispatch_event(&event);
1469        }
1470
1471        if (pi->link_down_reason == 0) {
1472                ppd->local_link_down_reason.sma = 0;
1473                ppd->local_link_down_reason.latest = 0;
1474        }
1475
1476        if (pi->neigh_link_down_reason == 0) {
1477                ppd->neigh_link_down_reason.sma = 0;
1478                ppd->neigh_link_down_reason.latest = 0;
1479        }
1480
1481        ppd->sm_trap_qp = be32_to_cpu(pi->sm_trap_qp);
1482        ppd->sa_qp = be32_to_cpu(pi->sa_qp);
1483
1484        ppd->port_error_action = be32_to_cpu(pi->port_error_action);
1485        lwe = be16_to_cpu(pi->link_width.enabled);
1486        if (lwe) {
1487                if (lwe == OPA_LINK_WIDTH_RESET ||
1488                    lwe == OPA_LINK_WIDTH_RESET_OLD)
1489                        set_link_width_enabled(ppd, ppd->link_width_supported);
1490                else if ((lwe & ~ppd->link_width_supported) == 0)
1491                        set_link_width_enabled(ppd, lwe);
1492                else
1493                        smp->status |= IB_SMP_INVALID_FIELD;
1494        }
1495        lwe = be16_to_cpu(pi->link_width_downgrade.enabled);
1496        /* LWD.E is always applied - 0 means "disabled" */
1497        if (lwe == OPA_LINK_WIDTH_RESET ||
1498            lwe == OPA_LINK_WIDTH_RESET_OLD) {
1499                set_link_width_downgrade_enabled(ppd,
1500                                                 ppd->
1501                                                 link_width_downgrade_supported
1502                                                 );
1503        } else if ((lwe & ~ppd->link_width_downgrade_supported) == 0) {
1504                /* only set and apply if something changed */
1505                if (lwe != ppd->link_width_downgrade_enabled) {
1506                        set_link_width_downgrade_enabled(ppd, lwe);
1507                        call_link_downgrade_policy = 1;
1508                }
1509        } else {
1510                smp->status |= IB_SMP_INVALID_FIELD;
1511        }
1512        lse = be16_to_cpu(pi->link_speed.enabled);
1513        if (lse) {
1514                if (lse & be16_to_cpu(pi->link_speed.supported))
1515                        set_link_speed_enabled(ppd, lse);
1516                else
1517                        smp->status |= IB_SMP_INVALID_FIELD;
1518        }
1519
1520        ibp->rvp.mkeyprot =
1521                (pi->mkeyprotect_lmc & OPA_PI_MASK_MKEY_PROT_BIT) >> 6;
1522        ibp->rvp.vl_high_limit = be16_to_cpu(pi->vl.high_limit) & 0xFF;
1523        (void)hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_VL_HIGH_LIMIT,
1524                                    ibp->rvp.vl_high_limit);
1525
1526        if (ppd->vls_supported / 2 > ARRAY_SIZE(pi->neigh_mtu.pvlx_to_mtu) ||
1527            ppd->vls_supported > ARRAY_SIZE(dd->vld)) {
1528                smp->status |= IB_SMP_INVALID_FIELD;
1529                return reply((struct ib_mad_hdr *)smp);
1530        }
1531        for (i = 0; i < ppd->vls_supported; i++) {
1532                if ((i % 2) == 0)
1533                        mtu = enum_to_mtu((pi->neigh_mtu.pvlx_to_mtu[i / 2] >>
1534                                           4) & 0xF);
1535                else
1536                        mtu = enum_to_mtu(pi->neigh_mtu.pvlx_to_mtu[i / 2] &
1537                                          0xF);
1538                if (mtu == 0xffff) {
1539                        pr_warn("SubnSet(OPA_PortInfo) mtu invalid %d (0x%x)\n",
1540                                mtu,
1541                                (pi->neigh_mtu.pvlx_to_mtu[0] >> 4) & 0xF);
1542                        smp->status |= IB_SMP_INVALID_FIELD;
1543                        mtu = hfi1_max_mtu; /* use a valid MTU */
1544                }
1545                if (dd->vld[i].mtu != mtu) {
1546                        dd_dev_info(dd,
1547                                    "MTU change on vl %d from %d to %d\n",
1548                                    i, dd->vld[i].mtu, mtu);
1549                        dd->vld[i].mtu = mtu;
1550                        call_set_mtu++;
1551                }
1552        }
1553        /* As per OPAV1 spec: VL15 must support and be configured
1554         * for operation with a 2048 or larger MTU.
1555         */
1556        mtu = enum_to_mtu(pi->neigh_mtu.pvlx_to_mtu[15 / 2] & 0xF);
1557        if (mtu < 2048 || mtu == 0xffff)
1558                mtu = 2048;
1559        if (dd->vld[15].mtu != mtu) {
1560                dd_dev_info(dd,
1561                            "MTU change on vl 15 from %d to %d\n",
1562                            dd->vld[15].mtu, mtu);
1563                dd->vld[15].mtu = mtu;
1564                call_set_mtu++;
1565        }
1566        if (call_set_mtu)
1567                set_mtu(ppd);
1568
1569        /* Set operational VLs */
1570        vls = pi->operational_vls & OPA_PI_MASK_OPERATIONAL_VL;
1571        if (vls) {
1572                if (vls > ppd->vls_supported) {
1573                        pr_warn("SubnSet(OPA_PortInfo) VL's supported invalid %d\n",
1574                                pi->operational_vls);
1575                        smp->status |= IB_SMP_INVALID_FIELD;
1576                } else {
1577                        if (hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_OP_VLS,
1578                                            vls) == -EINVAL)
1579                                smp->status |= IB_SMP_INVALID_FIELD;
1580                }
1581        }
1582
1583        if (pi->mkey_violations == 0)
1584                ibp->rvp.mkey_violations = 0;
1585
1586        if (pi->pkey_violations == 0)
1587                ibp->rvp.pkey_violations = 0;
1588
1589        if (pi->qkey_violations == 0)
1590                ibp->rvp.qkey_violations = 0;
1591
1592        ibp->rvp.subnet_timeout =
1593                pi->clientrereg_subnettimeout & OPA_PI_MASK_SUBNET_TIMEOUT;
1594
1595        crc_enabled = be16_to_cpu(pi->port_ltp_crc_mode);
1596        crc_enabled >>= 4;
1597        crc_enabled &= 0xf;
1598
1599        if (crc_enabled != 0)
1600                ppd->port_crc_mode_enabled = port_ltp_to_cap(crc_enabled);
1601
1602        ppd->is_active_optimize_enabled =
1603                        !!(be16_to_cpu(pi->port_mode)
1604                                        & OPA_PI_MASK_PORT_ACTIVE_OPTOMIZE);
1605
1606        ls_new = pi->port_states.portphysstate_portstate &
1607                        OPA_PI_MASK_PORT_STATE;
1608        ps_new = (pi->port_states.portphysstate_portstate &
1609                        OPA_PI_MASK_PORT_PHYSICAL_STATE) >> 4;
1610
1611        if (ls_old == IB_PORT_INIT) {
1612                if (start_of_sm_config) {
1613                        if (ls_new == ls_old || (ls_new == IB_PORT_ARMED))
1614                                ppd->is_sm_config_started = 1;
1615                } else if (ls_new == IB_PORT_ARMED) {
1616                        if (ppd->is_sm_config_started == 0) {
1617                                invalid = 1;
1618                                smp->status |= IB_SMP_INVALID_FIELD;
1619                        }
1620                }
1621        }
1622
1623        /* Handle CLIENT_REREGISTER event b/c SM asked us for it */
1624        if (clientrereg) {
1625                event.event = IB_EVENT_CLIENT_REREGISTER;
1626                ib_dispatch_event(&event);
1627        }
1628
1629        /*
1630         * Do the port state change now that the other link parameters
1631         * have been set.
1632         * Changing the port physical state only makes sense if the link
1633         * is down or is being set to down.
1634         */
1635
1636        if (!invalid) {
1637                ret = set_port_states(ppd, smp, ls_new, ps_new, local_mad);
1638                if (ret)
1639                        return ret;
1640        }
1641
1642        ret = __subn_get_opa_portinfo(smp, am, data, ibdev, port, resp_len,
1643                                      max_len);
1644
1645        /* restore re-reg bit per o14-12.2.1 */
1646        pi->clientrereg_subnettimeout |= clientrereg;
1647
1648        /*
1649         * Apply the new link downgrade policy.  This may result in a link
1650         * bounce.  Do this after everything else so things are settled.
1651         * Possible problem: if setting the port state above fails, then
1652         * the policy change is not applied.
1653         */
1654        if (call_link_downgrade_policy)
1655                apply_link_downgrade_policy(ppd, 0);
1656
1657        return ret;
1658
1659get_only:
1660        return __subn_get_opa_portinfo(smp, am, data, ibdev, port, resp_len,
1661                                       max_len);
1662}
1663
1664/**
1665 * set_pkeys - set the PKEY table for ctxt 0
1666 * @dd: the hfi1_ib device
1667 * @port: the IB port number
1668 * @pkeys: the PKEY table
1669 */
1670static int set_pkeys(struct hfi1_devdata *dd, u8 port, u16 *pkeys)
1671{
1672        struct hfi1_pportdata *ppd;
1673        int i;
1674        int changed = 0;
1675        int update_includes_mgmt_partition = 0;
1676
1677        /*
1678         * IB port one/two always maps to context zero/one,
1679         * always a kernel context, no locking needed
1680         * If we get here with ppd setup, no need to check
1681         * that rcd is valid.
1682         */
1683        ppd = dd->pport + (port - 1);
1684        /*
1685         * If the update does not include the management pkey, don't do it.
1686         */
1687        for (i = 0; i < ARRAY_SIZE(ppd->pkeys); i++) {
1688                if (pkeys[i] == LIM_MGMT_P_KEY) {
1689                        update_includes_mgmt_partition = 1;
1690                        break;
1691                }
1692        }
1693
1694        if (!update_includes_mgmt_partition)
1695                return 1;
1696
1697        for (i = 0; i < ARRAY_SIZE(ppd->pkeys); i++) {
1698                u16 key = pkeys[i];
1699                u16 okey = ppd->pkeys[i];
1700
1701                if (key == okey)
1702                        continue;
1703                /*
1704                 * The SM gives us the complete PKey table. We have
1705                 * to ensure that we put the PKeys in the matching
1706                 * slots.
1707                 */
1708                ppd->pkeys[i] = key;
1709                changed = 1;
1710        }
1711
1712        if (changed) {
1713                (void)hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_PKEYS, 0);
1714                hfi1_event_pkey_change(dd, port);
1715        }
1716
1717        return 0;
1718}
1719
1720static int __subn_set_opa_pkeytable(struct opa_smp *smp, u32 am, u8 *data,
1721                                    struct ib_device *ibdev, u8 port,
1722                                    u32 *resp_len, u32 max_len)
1723{
1724        struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
1725        u32 n_blocks_sent = OPA_AM_NBLK(am);
1726        u32 start_block = am & 0x7ff;
1727        u16 *p = (u16 *)data;
1728        __be16 *q = (__be16 *)data;
1729        int i;
1730        u16 n_blocks_avail;
1731        unsigned npkeys = hfi1_get_npkeys(dd);
1732        u32 size = 0;
1733
1734        if (n_blocks_sent == 0) {
1735                pr_warn("OPA Get PKey AM Invalid : P = %d; B = 0x%x; N = 0x%x\n",
1736                        port, start_block, n_blocks_sent);
1737                smp->status |= IB_SMP_INVALID_FIELD;
1738                return reply((struct ib_mad_hdr *)smp);
1739        }
1740
1741        n_blocks_avail = (u16)(npkeys / OPA_PARTITION_TABLE_BLK_SIZE) + 1;
1742
1743        size = sizeof(u16) * (n_blocks_sent * OPA_PARTITION_TABLE_BLK_SIZE);
1744
1745        if (smp_length_check(size, max_len)) {
1746                smp->status |= IB_SMP_INVALID_FIELD;
1747                return reply((struct ib_mad_hdr *)smp);
1748        }
1749
1750        if (start_block + n_blocks_sent > n_blocks_avail ||
1751            n_blocks_sent > OPA_NUM_PKEY_BLOCKS_PER_SMP) {
1752                pr_warn("OPA Set PKey AM Invalid : s 0x%x; req 0x%x; avail 0x%x; blk/smp 0x%lx\n",
1753                        start_block, n_blocks_sent, n_blocks_avail,
1754                        OPA_NUM_PKEY_BLOCKS_PER_SMP);
1755                smp->status |= IB_SMP_INVALID_FIELD;
1756                return reply((struct ib_mad_hdr *)smp);
1757        }
1758
1759        for (i = 0; i < n_blocks_sent * OPA_PARTITION_TABLE_BLK_SIZE; i++)
1760                p[i] = be16_to_cpu(q[i]);
1761
1762        if (start_block == 0 && set_pkeys(dd, port, p) != 0) {
1763                smp->status |= IB_SMP_INVALID_FIELD;
1764                return reply((struct ib_mad_hdr *)smp);
1765        }
1766
1767        return __subn_get_opa_pkeytable(smp, am, data, ibdev, port, resp_len,
1768                                        max_len);
1769}
1770
1771#define ILLEGAL_VL 12
1772/*
1773 * filter_sc2vlt changes mappings to VL15 to ILLEGAL_VL (except
1774 * for SC15, which must map to VL15). If we don't remap things this
1775 * way it is possible for VL15 counters to increment when we try to
1776 * send on a SC which is mapped to an invalid VL.
1777 * When getting the table convert ILLEGAL_VL back to VL15.
1778 */
1779static void filter_sc2vlt(void *data, bool set)
1780{
1781        int i;
1782        u8 *pd = data;
1783
1784        for (i = 0; i < OPA_MAX_SCS; i++) {
1785                if (i == 15)
1786                        continue;
1787
1788                if (set) {
1789                        if ((pd[i] & 0x1f) == 0xf)
1790                                pd[i] = ILLEGAL_VL;
1791                } else {
1792                        if ((pd[i] & 0x1f) == ILLEGAL_VL)
1793                                pd[i] = 0xf;
1794                }
1795        }
1796}
1797
1798static int set_sc2vlt_tables(struct hfi1_devdata *dd, void *data)
1799{
1800        u64 *val = data;
1801
1802        filter_sc2vlt(data, true);
1803
1804        write_csr(dd, SEND_SC2VLT0, *val++);
1805        write_csr(dd, SEND_SC2VLT1, *val++);
1806        write_csr(dd, SEND_SC2VLT2, *val++);
1807        write_csr(dd, SEND_SC2VLT3, *val++);
1808        write_seqlock_irq(&dd->sc2vl_lock);
1809        memcpy(dd->sc2vl, data, sizeof(dd->sc2vl));
1810        write_sequnlock_irq(&dd->sc2vl_lock);
1811        return 0;
1812}
1813
1814static int get_sc2vlt_tables(struct hfi1_devdata *dd, void *data)
1815{
1816        u64 *val = (u64 *)data;
1817
1818        *val++ = read_csr(dd, SEND_SC2VLT0);
1819        *val++ = read_csr(dd, SEND_SC2VLT1);
1820        *val++ = read_csr(dd, SEND_SC2VLT2);
1821        *val++ = read_csr(dd, SEND_SC2VLT3);
1822
1823        filter_sc2vlt((u64 *)data, false);
1824        return 0;
1825}
1826
1827static int __subn_get_opa_sl_to_sc(struct opa_smp *smp, u32 am, u8 *data,
1828                                   struct ib_device *ibdev, u8 port,
1829                                   u32 *resp_len, u32 max_len)
1830{
1831        struct hfi1_ibport *ibp = to_iport(ibdev, port);
1832        u8 *p = data;
1833        size_t size = ARRAY_SIZE(ibp->sl_to_sc); /* == 32 */
1834        unsigned i;
1835
1836        if (am || smp_length_check(size, max_len)) {
1837                smp->status |= IB_SMP_INVALID_FIELD;
1838                return reply((struct ib_mad_hdr *)smp);
1839        }
1840
1841        for (i = 0; i < ARRAY_SIZE(ibp->sl_to_sc); i++)
1842                *p++ = ibp->sl_to_sc[i];
1843
1844        if (resp_len)
1845                *resp_len += size;
1846
1847        return reply((struct ib_mad_hdr *)smp);
1848}
1849
1850static int __subn_set_opa_sl_to_sc(struct opa_smp *smp, u32 am, u8 *data,
1851                                   struct ib_device *ibdev, u8 port,
1852                                   u32 *resp_len, u32 max_len)
1853{
1854        struct hfi1_ibport *ibp = to_iport(ibdev, port);
1855        u8 *p = data;
1856        size_t size = ARRAY_SIZE(ibp->sl_to_sc);
1857        int i;
1858        u8 sc;
1859
1860        if (am || smp_length_check(size, max_len)) {
1861                smp->status |= IB_SMP_INVALID_FIELD;
1862                return reply((struct ib_mad_hdr *)smp);
1863        }
1864
1865        for (i = 0; i <  ARRAY_SIZE(ibp->sl_to_sc); i++) {
1866                sc = *p++;
1867                if (ibp->sl_to_sc[i] != sc) {
1868                        ibp->sl_to_sc[i] = sc;
1869
1870                        /* Put all stale qps into error state */
1871                        hfi1_error_port_qps(ibp, i);
1872                }
1873        }
1874
1875        return __subn_get_opa_sl_to_sc(smp, am, data, ibdev, port, resp_len,
1876                                       max_len);
1877}
1878
1879static int __subn_get_opa_sc_to_sl(struct opa_smp *smp, u32 am, u8 *data,
1880                                   struct ib_device *ibdev, u8 port,
1881                                   u32 *resp_len, u32 max_len)
1882{
1883        struct hfi1_ibport *ibp = to_iport(ibdev, port);
1884        u8 *p = data;
1885        size_t size = ARRAY_SIZE(ibp->sc_to_sl); /* == 32 */
1886        unsigned i;
1887
1888        if (am || smp_length_check(size, max_len)) {
1889                smp->status |= IB_SMP_INVALID_FIELD;
1890                return reply((struct ib_mad_hdr *)smp);
1891        }
1892
1893        for (i = 0; i < ARRAY_SIZE(ibp->sc_to_sl); i++)
1894                *p++ = ibp->sc_to_sl[i];
1895
1896        if (resp_len)
1897                *resp_len += size;
1898
1899        return reply((struct ib_mad_hdr *)smp);
1900}
1901
1902static int __subn_set_opa_sc_to_sl(struct opa_smp *smp, u32 am, u8 *data,
1903                                   struct ib_device *ibdev, u8 port,
1904                                   u32 *resp_len, u32 max_len)
1905{
1906        struct hfi1_ibport *ibp = to_iport(ibdev, port);
1907        size_t size = ARRAY_SIZE(ibp->sc_to_sl);
1908        u8 *p = data;
1909        int i;
1910
1911        if (am || smp_length_check(size, max_len)) {
1912                smp->status |= IB_SMP_INVALID_FIELD;
1913                return reply((struct ib_mad_hdr *)smp);
1914        }
1915
1916        for (i = 0; i < ARRAY_SIZE(ibp->sc_to_sl); i++)
1917                ibp->sc_to_sl[i] = *p++;
1918
1919        return __subn_get_opa_sc_to_sl(smp, am, data, ibdev, port, resp_len,
1920                                       max_len);
1921}
1922
1923static int __subn_get_opa_sc_to_vlt(struct opa_smp *smp, u32 am, u8 *data,
1924                                    struct ib_device *ibdev, u8 port,
1925                                    u32 *resp_len, u32 max_len)
1926{
1927        u32 n_blocks = OPA_AM_NBLK(am);
1928        struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
1929        void *vp = (void *)data;
1930        size_t size = 4 * sizeof(u64);
1931
1932        if (n_blocks != 1 || smp_length_check(size, max_len)) {
1933                smp->status |= IB_SMP_INVALID_FIELD;
1934                return reply((struct ib_mad_hdr *)smp);
1935        }
1936
1937        get_sc2vlt_tables(dd, vp);
1938
1939        if (resp_len)
1940                *resp_len += size;
1941
1942        return reply((struct ib_mad_hdr *)smp);
1943}
1944
1945static int __subn_set_opa_sc_to_vlt(struct opa_smp *smp, u32 am, u8 *data,
1946                                    struct ib_device *ibdev, u8 port,
1947                                    u32 *resp_len, u32 max_len)
1948{
1949        u32 n_blocks = OPA_AM_NBLK(am);
1950        int async_update = OPA_AM_ASYNC(am);
1951        struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
1952        void *vp = (void *)data;
1953        struct hfi1_pportdata *ppd;
1954        int lstate;
1955        /*
1956         * set_sc2vlt_tables writes the information contained in *data
1957         * to four 64-bit registers SendSC2VLt[0-3]. We need to make
1958         * sure *max_len is not greater than the total size of the four
1959         * SendSC2VLt[0-3] registers.
1960         */
1961        size_t size = 4 * sizeof(u64);
1962
1963        if (n_blocks != 1 || async_update || smp_length_check(size, max_len)) {
1964                smp->status |= IB_SMP_INVALID_FIELD;
1965                return reply((struct ib_mad_hdr *)smp);
1966        }
1967
1968        /* IB numbers ports from 1, hw from 0 */
1969        ppd = dd->pport + (port - 1);
1970        lstate = driver_lstate(ppd);
1971        /*
1972         * it's known that async_update is 0 by this point, but include
1973         * the explicit check for clarity
1974         */
1975        if (!async_update &&
1976            (lstate == IB_PORT_ARMED || lstate == IB_PORT_ACTIVE)) {
1977                smp->status |= IB_SMP_INVALID_FIELD;
1978                return reply((struct ib_mad_hdr *)smp);
1979        }
1980
1981        set_sc2vlt_tables(dd, vp);
1982
1983        return __subn_get_opa_sc_to_vlt(smp, am, data, ibdev, port, resp_len,
1984                                        max_len);
1985}
1986
1987static int __subn_get_opa_sc_to_vlnt(struct opa_smp *smp, u32 am, u8 *data,
1988                                     struct ib_device *ibdev, u8 port,
1989                                     u32 *resp_len, u32 max_len)
1990{
1991        u32 n_blocks = OPA_AM_NPORT(am);
1992        struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
1993        struct hfi1_pportdata *ppd;
1994        void *vp = (void *)data;
1995        int size = sizeof(struct sc2vlnt);
1996
1997        if (n_blocks != 1 || smp_length_check(size, max_len)) {
1998                smp->status |= IB_SMP_INVALID_FIELD;
1999                return reply((struct ib_mad_hdr *)smp);
2000        }
2001
2002        ppd = dd->pport + (port - 1);
2003
2004        fm_get_table(ppd, FM_TBL_SC2VLNT, vp);
2005
2006        if (resp_len)
2007                *resp_len += size;
2008
2009        return reply((struct ib_mad_hdr *)smp);
2010}
2011
2012static int __subn_set_opa_sc_to_vlnt(struct opa_smp *smp, u32 am, u8 *data,
2013                                     struct ib_device *ibdev, u8 port,
2014                                     u32 *resp_len, u32 max_len)
2015{
2016        u32 n_blocks = OPA_AM_NPORT(am);
2017        struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
2018        struct hfi1_pportdata *ppd;
2019        void *vp = (void *)data;
2020        int lstate;
2021        int size = sizeof(struct sc2vlnt);
2022
2023        if (n_blocks != 1 || smp_length_check(size, max_len)) {
2024                smp->status |= IB_SMP_INVALID_FIELD;
2025                return reply((struct ib_mad_hdr *)smp);
2026        }
2027
2028        /* IB numbers ports from 1, hw from 0 */
2029        ppd = dd->pport + (port - 1);
2030        lstate = driver_lstate(ppd);
2031        if (lstate == IB_PORT_ARMED || lstate == IB_PORT_ACTIVE) {
2032                smp->status |= IB_SMP_INVALID_FIELD;
2033                return reply((struct ib_mad_hdr *)smp);
2034        }
2035
2036        ppd = dd->pport + (port - 1);
2037
2038        fm_set_table(ppd, FM_TBL_SC2VLNT, vp);
2039
2040        return __subn_get_opa_sc_to_vlnt(smp, am, data, ibdev, port,
2041                                         resp_len, max_len);
2042}
2043
2044static int __subn_get_opa_psi(struct opa_smp *smp, u32 am, u8 *data,
2045                              struct ib_device *ibdev, u8 port,
2046                              u32 *resp_len, u32 max_len)
2047{
2048        u32 nports = OPA_AM_NPORT(am);
2049        u32 start_of_sm_config = OPA_AM_START_SM_CFG(am);
2050        u32 lstate;
2051        struct hfi1_ibport *ibp;
2052        struct hfi1_pportdata *ppd;
2053        struct opa_port_state_info *psi = (struct opa_port_state_info *)data;
2054
2055        if (nports != 1 || smp_length_check(sizeof(*psi), max_len)) {
2056                smp->status |= IB_SMP_INVALID_FIELD;
2057                return reply((struct ib_mad_hdr *)smp);
2058        }
2059
2060        ibp = to_iport(ibdev, port);
2061        ppd = ppd_from_ibp(ibp);
2062
2063        lstate = driver_lstate(ppd);
2064
2065        if (start_of_sm_config && (lstate == IB_PORT_INIT))
2066                ppd->is_sm_config_started = 1;
2067
2068        psi->port_states.ledenable_offlinereason = ppd->neighbor_normal << 4;
2069        psi->port_states.ledenable_offlinereason |=
2070                ppd->is_sm_config_started << 5;
2071        psi->port_states.ledenable_offlinereason |=
2072                ppd->offline_disabled_reason;
2073
2074        psi->port_states.portphysstate_portstate =
2075                (driver_pstate(ppd) << 4) | (lstate & 0xf);
2076        psi->link_width_downgrade_tx_active =
2077                cpu_to_be16(ppd->link_width_downgrade_tx_active);
2078        psi->link_width_downgrade_rx_active =
2079                cpu_to_be16(ppd->link_width_downgrade_rx_active);
2080        if (resp_len)
2081                *resp_len += sizeof(struct opa_port_state_info);
2082
2083        return reply((struct ib_mad_hdr *)smp);
2084}
2085
2086static int __subn_set_opa_psi(struct opa_smp *smp, u32 am, u8 *data,
2087                              struct ib_device *ibdev, u8 port,
2088                              u32 *resp_len, u32 max_len, int local_mad)
2089{
2090        u32 nports = OPA_AM_NPORT(am);
2091        u32 start_of_sm_config = OPA_AM_START_SM_CFG(am);
2092        u32 ls_old;
2093        u8 ls_new, ps_new;
2094        struct hfi1_ibport *ibp;
2095        struct hfi1_pportdata *ppd;
2096        struct opa_port_state_info *psi = (struct opa_port_state_info *)data;
2097        int ret, invalid = 0;
2098
2099        if (nports != 1 || smp_length_check(sizeof(*psi), max_len)) {
2100                smp->status |= IB_SMP_INVALID_FIELD;
2101                return reply((struct ib_mad_hdr *)smp);
2102        }
2103
2104        ibp = to_iport(ibdev, port);
2105        ppd = ppd_from_ibp(ibp);
2106
2107        ls_old = driver_lstate(ppd);
2108
2109        ls_new = port_states_to_logical_state(&psi->port_states);
2110        ps_new = port_states_to_phys_state(&psi->port_states);
2111
2112        if (ls_old == IB_PORT_INIT) {
2113                if (start_of_sm_config) {
2114                        if (ls_new == ls_old || (ls_new == IB_PORT_ARMED))
2115                                ppd->is_sm_config_started = 1;
2116                } else if (ls_new == IB_PORT_ARMED) {
2117                        if (ppd->is_sm_config_started == 0) {
2118                                invalid = 1;
2119                                smp->status |= IB_SMP_INVALID_FIELD;
2120                        }
2121                }
2122        }
2123
2124        if (!invalid) {
2125                ret = set_port_states(ppd, smp, ls_new, ps_new, local_mad);
2126                if (ret)
2127                        return ret;
2128        }
2129
2130        return __subn_get_opa_psi(smp, am, data, ibdev, port, resp_len,
2131                                  max_len);
2132}
2133
2134static int __subn_get_opa_cable_info(struct opa_smp *smp, u32 am, u8 *data,
2135                                     struct ib_device *ibdev, u8 port,
2136                                     u32 *resp_len, u32 max_len)
2137{
2138        struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
2139        u32 addr = OPA_AM_CI_ADDR(am);
2140        u32 len = OPA_AM_CI_LEN(am) + 1;
2141        int ret;
2142
2143        if (dd->pport->port_type != PORT_TYPE_QSFP ||
2144            smp_length_check(len, max_len)) {
2145                smp->status |= IB_SMP_INVALID_FIELD;
2146                return reply((struct ib_mad_hdr *)smp);
2147        }
2148
2149#define __CI_PAGE_SIZE BIT(7) /* 128 bytes */
2150#define __CI_PAGE_MASK ~(__CI_PAGE_SIZE - 1)
2151#define __CI_PAGE_NUM(a) ((a) & __CI_PAGE_MASK)
2152
2153        /*
2154         * check that addr is within spec, and
2155         * addr and (addr + len - 1) are on the same "page"
2156         */
2157        if (addr >= 4096 ||
2158            (__CI_PAGE_NUM(addr) != __CI_PAGE_NUM(addr + len - 1))) {
2159                smp->status |= IB_SMP_INVALID_FIELD;
2160                return reply((struct ib_mad_hdr *)smp);
2161        }
2162
2163        ret = get_cable_info(dd, port, addr, len, data);
2164
2165        if (ret == -ENODEV) {
2166                smp->status |= IB_SMP_UNSUP_METH_ATTR;
2167                return reply((struct ib_mad_hdr *)smp);
2168        }
2169
2170        /* The address range for the CableInfo SMA query is wider than the
2171         * memory available on the QSFP cable. We want to return a valid
2172         * response, albeit zeroed out, for address ranges beyond available
2173         * memory but that are within the CableInfo query spec
2174         */
2175        if (ret < 0 && ret != -ERANGE) {
2176                smp->status |= IB_SMP_INVALID_FIELD;
2177                return reply((struct ib_mad_hdr *)smp);
2178        }
2179
2180        if (resp_len)
2181                *resp_len += len;
2182
2183        return reply((struct ib_mad_hdr *)smp);
2184}
2185
2186static int __subn_get_opa_bct(struct opa_smp *smp, u32 am, u8 *data,
2187                              struct ib_device *ibdev, u8 port, u32 *resp_len,
2188                              u32 max_len)
2189{
2190        u32 num_ports = OPA_AM_NPORT(am);
2191        struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
2192        struct hfi1_pportdata *ppd;
2193        struct buffer_control *p = (struct buffer_control *)data;
2194        int size = sizeof(struct buffer_control);
2195
2196        if (num_ports != 1 || smp_length_check(size, max_len)) {
2197                smp->status |= IB_SMP_INVALID_FIELD;
2198                return reply((struct ib_mad_hdr *)smp);
2199        }
2200
2201        ppd = dd->pport + (port - 1);
2202        fm_get_table(ppd, FM_TBL_BUFFER_CONTROL, p);
2203        trace_bct_get(dd, p);
2204        if (resp_len)
2205                *resp_len += size;
2206
2207        return reply((struct ib_mad_hdr *)smp);
2208}
2209
2210static int __subn_set_opa_bct(struct opa_smp *smp, u32 am, u8 *data,
2211                              struct ib_device *ibdev, u8 port, u32 *resp_len,
2212                              u32 max_len)
2213{
2214        u32 num_ports = OPA_AM_NPORT(am);
2215        struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
2216        struct hfi1_pportdata *ppd;
2217        struct buffer_control *p = (struct buffer_control *)data;
2218
2219        if (num_ports != 1 || smp_length_check(sizeof(*p), max_len)) {
2220                smp->status |= IB_SMP_INVALID_FIELD;
2221                return reply((struct ib_mad_hdr *)smp);
2222        }
2223        ppd = dd->pport + (port - 1);
2224        trace_bct_set(dd, p);
2225        if (fm_set_table(ppd, FM_TBL_BUFFER_CONTROL, p) < 0) {
2226                smp->status |= IB_SMP_INVALID_FIELD;
2227                return reply((struct ib_mad_hdr *)smp);
2228        }
2229
2230        return __subn_get_opa_bct(smp, am, data, ibdev, port, resp_len,
2231                                  max_len);
2232}
2233
2234static int __subn_get_opa_vl_arb(struct opa_smp *smp, u32 am, u8 *data,
2235                                 struct ib_device *ibdev, u8 port,
2236                                 u32 *resp_len, u32 max_len)
2237{
2238        struct hfi1_pportdata *ppd = ppd_from_ibp(to_iport(ibdev, port));
2239        u32 num_ports = OPA_AM_NPORT(am);
2240        u8 section = (am & 0x00ff0000) >> 16;
2241        u8 *p = data;
2242        int size = 256;
2243
2244        if (num_ports != 1 || smp_length_check(size, max_len)) {
2245                smp->status |= IB_SMP_INVALID_FIELD;
2246                return reply((struct ib_mad_hdr *)smp);
2247        }
2248
2249        switch (section) {
2250        case OPA_VLARB_LOW_ELEMENTS:
2251                fm_get_table(ppd, FM_TBL_VL_LOW_ARB, p);
2252                break;
2253        case OPA_VLARB_HIGH_ELEMENTS:
2254                fm_get_table(ppd, FM_TBL_VL_HIGH_ARB, p);
2255                break;
2256        case OPA_VLARB_PREEMPT_ELEMENTS:
2257                fm_get_table(ppd, FM_TBL_VL_PREEMPT_ELEMS, p);
2258                break;
2259        case OPA_VLARB_PREEMPT_MATRIX:
2260                fm_get_table(ppd, FM_TBL_VL_PREEMPT_MATRIX, p);
2261                break;
2262        default:
2263                pr_warn("OPA SubnGet(VL Arb) AM Invalid : 0x%x\n",
2264                        be32_to_cpu(smp->attr_mod));
2265                smp->status |= IB_SMP_INVALID_FIELD;
2266                size = 0;
2267                break;
2268        }
2269
2270        if (size > 0 && resp_len)
2271                *resp_len += size;
2272
2273        return reply((struct ib_mad_hdr *)smp);
2274}
2275
2276static int __subn_set_opa_vl_arb(struct opa_smp *smp, u32 am, u8 *data,
2277                                 struct ib_device *ibdev, u8 port,
2278                                 u32 *resp_len, u32 max_len)
2279{
2280        struct hfi1_pportdata *ppd = ppd_from_ibp(to_iport(ibdev, port));
2281        u32 num_ports = OPA_AM_NPORT(am);
2282        u8 section = (am & 0x00ff0000) >> 16;
2283        u8 *p = data;
2284        int size = 256;
2285
2286        if (num_ports != 1 || smp_length_check(size, max_len)) {
2287                smp->status |= IB_SMP_INVALID_FIELD;
2288                return reply((struct ib_mad_hdr *)smp);
2289        }
2290
2291        switch (section) {
2292        case OPA_VLARB_LOW_ELEMENTS:
2293                (void)fm_set_table(ppd, FM_TBL_VL_LOW_ARB, p);
2294                break;
2295        case OPA_VLARB_HIGH_ELEMENTS:
2296                (void)fm_set_table(ppd, FM_TBL_VL_HIGH_ARB, p);
2297                break;
2298        /*
2299         * neither OPA_VLARB_PREEMPT_ELEMENTS, or OPA_VLARB_PREEMPT_MATRIX
2300         * can be changed from the default values
2301         */
2302        case OPA_VLARB_PREEMPT_ELEMENTS:
2303                /* FALLTHROUGH */
2304        case OPA_VLARB_PREEMPT_MATRIX:
2305                smp->status |= IB_SMP_UNSUP_METH_ATTR;
2306                break;
2307        default:
2308                pr_warn("OPA SubnSet(VL Arb) AM Invalid : 0x%x\n",
2309                        be32_to_cpu(smp->attr_mod));
2310                smp->status |= IB_SMP_INVALID_FIELD;
2311                break;
2312        }
2313
2314        return __subn_get_opa_vl_arb(smp, am, data, ibdev, port, resp_len,
2315                                     max_len);
2316}
2317
2318struct opa_pma_mad {
2319        struct ib_mad_hdr mad_hdr;
2320        u8 data[2024];
2321} __packed;
2322
2323struct opa_port_status_req {
2324        __u8 port_num;
2325        __u8 reserved[3];
2326        __be32 vl_select_mask;
2327};
2328
2329#define VL_MASK_ALL             0x00000000000080ffUL
2330
2331struct opa_port_status_rsp {
2332        __u8 port_num;
2333        __u8 reserved[3];
2334        __be32  vl_select_mask;
2335
2336        /* Data counters */
2337        __be64 port_xmit_data;
2338        __be64 port_rcv_data;
2339        __be64 port_xmit_pkts;
2340        __be64 port_rcv_pkts;
2341        __be64 port_multicast_xmit_pkts;
2342        __be64 port_multicast_rcv_pkts;
2343        __be64 port_xmit_wait;
2344        __be64 sw_port_congestion;
2345        __be64 port_rcv_fecn;
2346        __be64 port_rcv_becn;
2347        __be64 port_xmit_time_cong;
2348        __be64 port_xmit_wasted_bw;
2349        __be64 port_xmit_wait_data;
2350        __be64 port_rcv_bubble;
2351        __be64 port_mark_fecn;
2352        /* Error counters */
2353        __be64 port_rcv_constraint_errors;
2354        __be64 port_rcv_switch_relay_errors;
2355        __be64 port_xmit_discards;
2356        __be64 port_xmit_constraint_errors;
2357        __be64 port_rcv_remote_physical_errors;
2358        __be64 local_link_integrity_errors;
2359        __be64 port_rcv_errors;
2360        __be64 excessive_buffer_overruns;
2361        __be64 fm_config_errors;
2362        __be32 link_error_recovery;
2363        __be32 link_downed;
2364        u8 uncorrectable_errors;
2365
2366        u8 link_quality_indicator; /* 5res, 3bit */
2367        u8 res2[6];
2368        struct _vls_pctrs {
2369                /* per-VL Data counters */
2370                __be64 port_vl_xmit_data;
2371                __be64 port_vl_rcv_data;
2372                __be64 port_vl_xmit_pkts;
2373                __be64 port_vl_rcv_pkts;
2374                __be64 port_vl_xmit_wait;
2375                __be64 sw_port_vl_congestion;
2376                __be64 port_vl_rcv_fecn;
2377                __be64 port_vl_rcv_becn;
2378                __be64 port_xmit_time_cong;
2379                __be64 port_vl_xmit_wasted_bw;
2380                __be64 port_vl_xmit_wait_data;
2381                __be64 port_vl_rcv_bubble;
2382                __be64 port_vl_mark_fecn;
2383                __be64 port_vl_xmit_discards;
2384        } vls[0]; /* real array size defined by # bits set in vl_select_mask */
2385};
2386
2387enum counter_selects {
2388        CS_PORT_XMIT_DATA                       = (1 << 31),
2389        CS_PORT_RCV_DATA                        = (1 << 30),
2390        CS_PORT_XMIT_PKTS                       = (1 << 29),
2391        CS_PORT_RCV_PKTS                        = (1 << 28),
2392        CS_PORT_MCAST_XMIT_PKTS                 = (1 << 27),
2393        CS_PORT_MCAST_RCV_PKTS                  = (1 << 26),
2394        CS_PORT_XMIT_WAIT                       = (1 << 25),
2395        CS_SW_PORT_CONGESTION                   = (1 << 24),
2396        CS_PORT_RCV_FECN                        = (1 << 23),
2397        CS_PORT_RCV_BECN                        = (1 << 22),
2398        CS_PORT_XMIT_TIME_CONG                  = (1 << 21),
2399        CS_PORT_XMIT_WASTED_BW                  = (1 << 20),
2400        CS_PORT_XMIT_WAIT_DATA                  = (1 << 19),
2401        CS_PORT_RCV_BUBBLE                      = (1 << 18),
2402        CS_PORT_MARK_FECN                       = (1 << 17),
2403        CS_PORT_RCV_CONSTRAINT_ERRORS           = (1 << 16),
2404        CS_PORT_RCV_SWITCH_RELAY_ERRORS         = (1 << 15),
2405        CS_PORT_XMIT_DISCARDS                   = (1 << 14),
2406        CS_PORT_XMIT_CONSTRAINT_ERRORS          = (1 << 13),
2407        CS_PORT_RCV_REMOTE_PHYSICAL_ERRORS      = (1 << 12),
2408        CS_LOCAL_LINK_INTEGRITY_ERRORS          = (1 << 11),
2409        CS_PORT_RCV_ERRORS                      = (1 << 10),
2410        CS_EXCESSIVE_BUFFER_OVERRUNS            = (1 << 9),
2411        CS_FM_CONFIG_ERRORS                     = (1 << 8),
2412        CS_LINK_ERROR_RECOVERY                  = (1 << 7),
2413        CS_LINK_DOWNED                          = (1 << 6),
2414        CS_UNCORRECTABLE_ERRORS                 = (1 << 5),
2415};
2416
2417struct opa_clear_port_status {
2418        __be64 port_select_mask[4];
2419        __be32 counter_select_mask;
2420};
2421
2422struct opa_aggregate {
2423        __be16 attr_id;
2424        __be16 err_reqlength;   /* 1 bit, 8 res, 7 bit */
2425        __be32 attr_mod;
2426        u8 data[0];
2427};
2428
2429#define MSK_LLI 0x000000f0
2430#define MSK_LLI_SFT 4
2431#define MSK_LER 0x0000000f
2432#define MSK_LER_SFT 0
2433#define ADD_LLI 8
2434#define ADD_LER 2
2435
2436/* Request contains first three fields, response contains those plus the rest */
2437struct opa_port_data_counters_msg {
2438        __be64 port_select_mask[4];
2439        __be32 vl_select_mask;
2440        __be32 resolution;
2441
2442        /* Response fields follow */
2443        struct _port_dctrs {
2444                u8 port_number;
2445                u8 reserved2[3];
2446                __be32 link_quality_indicator; /* 29res, 3bit */
2447
2448                /* Data counters */
2449                __be64 port_xmit_data;
2450                __be64 port_rcv_data;
2451                __be64 port_xmit_pkts;
2452                __be64 port_rcv_pkts;
2453                __be64 port_multicast_xmit_pkts;
2454                __be64 port_multicast_rcv_pkts;
2455                __be64 port_xmit_wait;
2456                __be64 sw_port_congestion;
2457                __be64 port_rcv_fecn;
2458                __be64 port_rcv_becn;
2459                __be64 port_xmit_time_cong;
2460                __be64 port_xmit_wasted_bw;
2461                __be64 port_xmit_wait_data;
2462                __be64 port_rcv_bubble;
2463                __be64 port_mark_fecn;
2464
2465                __be64 port_error_counter_summary;
2466                /* Sum of error counts/port */
2467
2468                struct _vls_dctrs {
2469                        /* per-VL Data counters */
2470                        __be64 port_vl_xmit_data;
2471                        __be64 port_vl_rcv_data;
2472                        __be64 port_vl_xmit_pkts;
2473                        __be64 port_vl_rcv_pkts;
2474                        __be64 port_vl_xmit_wait;
2475                        __be64 sw_port_vl_congestion;
2476                        __be64 port_vl_rcv_fecn;
2477                        __be64 port_vl_rcv_becn;
2478                        __be64 port_xmit_time_cong;
2479                        __be64 port_vl_xmit_wasted_bw;
2480                        __be64 port_vl_xmit_wait_data;
2481                        __be64 port_vl_rcv_bubble;
2482                        __be64 port_vl_mark_fecn;
2483                } vls[0];
2484                /* array size defined by #bits set in vl_select_mask*/
2485        } port[1]; /* array size defined by  #ports in attribute modifier */
2486};
2487
2488struct opa_port_error_counters64_msg {
2489        /*
2490         * Request contains first two fields, response contains the
2491         * whole magilla
2492         */
2493        __be64 port_select_mask[4];
2494        __be32 vl_select_mask;
2495
2496        /* Response-only fields follow */
2497        __be32 reserved1;
2498        struct _port_ectrs {
2499                u8 port_number;
2500                u8 reserved2[7];
2501                __be64 port_rcv_constraint_errors;
2502                __be64 port_rcv_switch_relay_errors;
2503                __be64 port_xmit_discards;
2504                __be64 port_xmit_constraint_errors;
2505                __be64 port_rcv_remote_physical_errors;
2506                __be64 local_link_integrity_errors;
2507                __be64 port_rcv_errors;
2508                __be64 excessive_buffer_overruns;
2509                __be64 fm_config_errors;
2510                __be32 link_error_recovery;
2511                __be32 link_downed;
2512                u8 uncorrectable_errors;
2513                u8 reserved3[7];
2514                struct _vls_ectrs {
2515                        __be64 port_vl_xmit_discards;
2516                } vls[0];
2517                /* array size defined by #bits set in vl_select_mask */
2518        } port[1]; /* array size defined by #ports in attribute modifier */
2519};
2520
2521struct opa_port_error_info_msg {
2522        __be64 port_select_mask[4];
2523        __be32 error_info_select_mask;
2524        __be32 reserved1;
2525        struct _port_ei {
2526                u8 port_number;
2527                u8 reserved2[7];
2528
2529                /* PortRcvErrorInfo */
2530                struct {
2531                        u8 status_and_code;
2532                        union {
2533                                u8 raw[17];
2534                                struct {
2535                                        /* EI1to12 format */
2536                                        u8 packet_flit1[8];
2537                                        u8 packet_flit2[8];
2538                                        u8 remaining_flit_bits12;
2539                                } ei1to12;
2540                                struct {
2541                                        u8 packet_bytes[8];
2542                                        u8 remaining_flit_bits;
2543                                } ei13;
2544                        } ei;
2545                        u8 reserved3[6];
2546                } __packed port_rcv_ei;
2547
2548                /* ExcessiveBufferOverrunInfo */
2549                struct {
2550                        u8 status_and_sc;
2551                        u8 reserved4[7];
2552                } __packed excessive_buffer_overrun_ei;
2553
2554                /* PortXmitConstraintErrorInfo */
2555                struct {
2556                        u8 status;
2557                        u8 reserved5;
2558                        __be16 pkey;
2559                        __be32 slid;
2560                } __packed port_xmit_constraint_ei;
2561
2562                /* PortRcvConstraintErrorInfo */
2563                struct {
2564                        u8 status;
2565                        u8 reserved6;
2566                        __be16 pkey;
2567                        __be32 slid;
2568                } __packed port_rcv_constraint_ei;
2569
2570                /* PortRcvSwitchRelayErrorInfo */
2571                struct {
2572                        u8 status_and_code;
2573                        u8 reserved7[3];
2574                        __u32 error_info;
2575                } __packed port_rcv_switch_relay_ei;
2576
2577                /* UncorrectableErrorInfo */
2578                struct {
2579                        u8 status_and_code;
2580                        u8 reserved8;
2581                } __packed uncorrectable_ei;
2582
2583                /* FMConfigErrorInfo */
2584                struct {
2585                        u8 status_and_code;
2586                        u8 error_info;
2587                } __packed fm_config_ei;
2588                __u32 reserved9;
2589        } port[1]; /* actual array size defined by #ports in attr modifier */
2590};
2591
2592/* opa_port_error_info_msg error_info_select_mask bit definitions */
2593enum error_info_selects {
2594        ES_PORT_RCV_ERROR_INFO                  = (1 << 31),
2595        ES_EXCESSIVE_BUFFER_OVERRUN_INFO        = (1 << 30),
2596        ES_PORT_XMIT_CONSTRAINT_ERROR_INFO      = (1 << 29),
2597        ES_PORT_RCV_CONSTRAINT_ERROR_INFO       = (1 << 28),
2598        ES_PORT_RCV_SWITCH_RELAY_ERROR_INFO     = (1 << 27),
2599        ES_UNCORRECTABLE_ERROR_INFO             = (1 << 26),
2600        ES_FM_CONFIG_ERROR_INFO                 = (1 << 25)
2601};
2602
2603static int pma_get_opa_classportinfo(struct opa_pma_mad *pmp,
2604                                     struct ib_device *ibdev, u32 *resp_len)
2605{
2606        struct opa_class_port_info *p =
2607                (struct opa_class_port_info *)pmp->data;
2608
2609        memset(pmp->data, 0, sizeof(pmp->data));
2610
2611        if (pmp->mad_hdr.attr_mod != 0)
2612                pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
2613
2614        p->base_version = OPA_MGMT_BASE_VERSION;
2615        p->class_version = OPA_SM_CLASS_VERSION;
2616        /*
2617         * Expected response time is 4.096 usec. * 2^18 == 1.073741824 sec.
2618         */
2619        p->cap_mask2_resp_time = cpu_to_be32(18);
2620
2621        if (resp_len)
2622                *resp_len += sizeof(*p);
2623
2624        return reply((struct ib_mad_hdr *)pmp);
2625}
2626
2627static void a0_portstatus(struct hfi1_pportdata *ppd,
2628                          struct opa_port_status_rsp *rsp)
2629{
2630        if (!is_bx(ppd->dd)) {
2631                unsigned long vl;
2632                u64 sum_vl_xmit_wait = 0;
2633                unsigned long vl_all_mask = VL_MASK_ALL;
2634
2635                for_each_set_bit(vl, &vl_all_mask, BITS_PER_LONG) {
2636                        u64 tmp = sum_vl_xmit_wait +
2637                                  read_port_cntr(ppd, C_TX_WAIT_VL,
2638                                                 idx_from_vl(vl));
2639                        if (tmp < sum_vl_xmit_wait) {
2640                                /* we wrapped */
2641                                sum_vl_xmit_wait = (u64)~0;
2642                                break;
2643                        }
2644                        sum_vl_xmit_wait = tmp;
2645                }
2646                if (be64_to_cpu(rsp->port_xmit_wait) > sum_vl_xmit_wait)
2647                        rsp->port_xmit_wait = cpu_to_be64(sum_vl_xmit_wait);
2648        }
2649}
2650
2651/**
2652 * tx_link_width - convert link width bitmask to integer
2653 * value representing actual link width.
2654 * @link_width: width of active link
2655 * @return: return index of the bit set in link_width var
2656 *
2657 * The function convert and return the index of bit set
2658 * that indicate the current link width.
2659 */
2660u16 tx_link_width(u16 link_width)
2661{
2662        int n = LINK_WIDTH_DEFAULT;
2663        u16 tx_width = n;
2664
2665        while (link_width && n) {
2666                if (link_width & (1 << (n - 1))) {
2667                        tx_width = n;
2668                        break;
2669                }
2670                n--;
2671        }
2672
2673        return tx_width;
2674}
2675
2676/**
2677 * get_xmit_wait_counters - Convert HFI 's SendWaitCnt/SendWaitVlCnt
2678 * counter in unit of TXE cycle times to flit times.
2679 * @ppd: info of physical Hfi port
2680 * @link_width: width of active link
2681 * @link_speed: speed of active link
2682 * @vl: represent VL0-VL7, VL15 for PortVLXmitWait counters request
2683 * and if vl value is C_VL_COUNT, it represent SendWaitCnt
2684 * counter request
2685 * @return: return SendWaitCnt/SendWaitVlCnt counter value per vl.
2686 *
2687 * Convert SendWaitCnt/SendWaitVlCnt counter from TXE cycle times to
2688 * flit times. Call this function to samples these counters. This
2689 * function will calculate for previous state transition and update
2690 * current state at end of function using ppd->prev_link_width and
2691 * ppd->port_vl_xmit_wait_last to port_vl_xmit_wait_curr and link_width.
2692 */
2693u64 get_xmit_wait_counters(struct hfi1_pportdata *ppd,
2694                           u16 link_width, u16 link_speed, int vl)
2695{
2696        u64 port_vl_xmit_wait_curr;
2697        u64 delta_vl_xmit_wait;
2698        u64 xmit_wait_val;
2699
2700        if (vl > C_VL_COUNT)
2701                return  0;
2702        if (vl < C_VL_COUNT)
2703                port_vl_xmit_wait_curr =
2704                        read_port_cntr(ppd, C_TX_WAIT_VL, vl);
2705        else
2706                port_vl_xmit_wait_curr =
2707                        read_port_cntr(ppd, C_TX_WAIT, CNTR_INVALID_VL);
2708
2709        xmit_wait_val =
2710                port_vl_xmit_wait_curr -
2711                ppd->port_vl_xmit_wait_last[vl];
2712        delta_vl_xmit_wait =
2713                convert_xmit_counter(xmit_wait_val,
2714                                     ppd->prev_link_width,
2715                                     link_speed);
2716
2717        ppd->vl_xmit_flit_cnt[vl] += delta_vl_xmit_wait;
2718        ppd->port_vl_xmit_wait_last[vl] = port_vl_xmit_wait_curr;
2719        ppd->prev_link_width = link_width;
2720
2721        return ppd->vl_xmit_flit_cnt[vl];
2722}
2723
2724static int pma_get_opa_portstatus(struct opa_pma_mad *pmp,
2725                                  struct ib_device *ibdev,
2726                                  u8 port, u32 *resp_len)
2727{
2728        struct opa_port_status_req *req =
2729                (struct opa_port_status_req *)pmp->data;
2730        struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
2731        struct opa_port_status_rsp *rsp;
2732        unsigned long vl_select_mask = be32_to_cpu(req->vl_select_mask);
2733        unsigned long vl;
2734        size_t response_data_size;
2735        u32 nports = be32_to_cpu(pmp->mad_hdr.attr_mod) >> 24;
2736        u8 port_num = req->port_num;
2737        u8 num_vls = hweight64(vl_select_mask);
2738        struct _vls_pctrs *vlinfo;
2739        struct hfi1_ibport *ibp = to_iport(ibdev, port);
2740        struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
2741        int vfi;
2742        u64 tmp, tmp2;
2743        u16 link_width;
2744        u16 link_speed;
2745
2746        response_data_size = struct_size(rsp, vls, num_vls);
2747        if (response_data_size > sizeof(pmp->data)) {
2748                pmp->mad_hdr.status |= OPA_PM_STATUS_REQUEST_TOO_LARGE;
2749                return reply((struct ib_mad_hdr *)pmp);
2750        }
2751
2752        if (nports != 1 || (port_num && port_num != port) ||
2753            num_vls > OPA_MAX_VLS || (vl_select_mask & ~VL_MASK_ALL)) {
2754                pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
2755                return reply((struct ib_mad_hdr *)pmp);
2756        }
2757
2758        memset(pmp->data, 0, sizeof(pmp->data));
2759
2760        rsp = (struct opa_port_status_rsp *)pmp->data;
2761        if (port_num)
2762                rsp->port_num = port_num;
2763        else
2764                rsp->port_num = port;
2765
2766        rsp->port_rcv_constraint_errors =
2767                cpu_to_be64(read_port_cntr(ppd, C_SW_RCV_CSTR_ERR,
2768                                           CNTR_INVALID_VL));
2769
2770        hfi1_read_link_quality(dd, &rsp->link_quality_indicator);
2771
2772        rsp->vl_select_mask = cpu_to_be32((u32)vl_select_mask);
2773        rsp->port_xmit_data = cpu_to_be64(read_dev_cntr(dd, C_DC_XMIT_FLITS,
2774                                          CNTR_INVALID_VL));
2775        rsp->port_rcv_data = cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_FLITS,
2776                                         CNTR_INVALID_VL));
2777        rsp->port_xmit_pkts = cpu_to_be64(read_dev_cntr(dd, C_DC_XMIT_PKTS,
2778                                          CNTR_INVALID_VL));
2779        rsp->port_rcv_pkts = cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_PKTS,
2780                                         CNTR_INVALID_VL));
2781        rsp->port_multicast_xmit_pkts =
2782                cpu_to_be64(read_dev_cntr(dd, C_DC_MC_XMIT_PKTS,
2783                                          CNTR_INVALID_VL));
2784        rsp->port_multicast_rcv_pkts =
2785                cpu_to_be64(read_dev_cntr(dd, C_DC_MC_RCV_PKTS,
2786                                          CNTR_INVALID_VL));
2787        /*
2788         * Convert PortXmitWait counter from TXE cycle times
2789         * to flit times.
2790         */
2791        link_width =
2792                tx_link_width(ppd->link_width_downgrade_tx_active);
2793        link_speed = get_link_speed(ppd->link_speed_active);
2794        rsp->port_xmit_wait =
2795                cpu_to_be64(get_xmit_wait_counters(ppd, link_width,
2796                                                   link_speed, C_VL_COUNT));
2797        rsp->port_rcv_fecn =
2798                cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_FCN, CNTR_INVALID_VL));
2799        rsp->port_rcv_becn =
2800                cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_BCN, CNTR_INVALID_VL));
2801        rsp->port_xmit_discards =
2802                cpu_to_be64(read_port_cntr(ppd, C_SW_XMIT_DSCD,
2803                                           CNTR_INVALID_VL));
2804        rsp->port_xmit_constraint_errors =
2805                cpu_to_be64(read_port_cntr(ppd, C_SW_XMIT_CSTR_ERR,
2806                                           CNTR_INVALID_VL));
2807        rsp->port_rcv_remote_physical_errors =
2808                cpu_to_be64(read_dev_cntr(dd, C_DC_RMT_PHY_ERR,
2809                                          CNTR_INVALID_VL));
2810        rsp->local_link_integrity_errors =
2811                cpu_to_be64(read_dev_cntr(dd, C_DC_RX_REPLAY,
2812                                          CNTR_INVALID_VL));
2813        tmp = read_dev_cntr(dd, C_DC_SEQ_CRC_CNT, CNTR_INVALID_VL);
2814        tmp2 = tmp + read_dev_cntr(dd, C_DC_REINIT_FROM_PEER_CNT,
2815                                   CNTR_INVALID_VL);
2816        if (tmp2 > (u32)UINT_MAX || tmp2 < tmp) {
2817                /* overflow/wrapped */
2818                rsp->link_error_recovery = cpu_to_be32(~0);
2819        } else {
2820                rsp->link_error_recovery = cpu_to_be32(tmp2);
2821        }
2822        rsp->port_rcv_errors =
2823                cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_ERR, CNTR_INVALID_VL));
2824        rsp->excessive_buffer_overruns =
2825                cpu_to_be64(read_dev_cntr(dd, C_RCV_OVF, CNTR_INVALID_VL));
2826        rsp->fm_config_errors =
2827                cpu_to_be64(read_dev_cntr(dd, C_DC_FM_CFG_ERR,
2828                                          CNTR_INVALID_VL));
2829        rsp->link_downed = cpu_to_be32(read_port_cntr(ppd, C_SW_LINK_DOWN,
2830                                                      CNTR_INVALID_VL));
2831
2832        /* rsp->uncorrectable_errors is 8 bits wide, and it pegs at 0xff */
2833        tmp = read_dev_cntr(dd, C_DC_UNC_ERR, CNTR_INVALID_VL);
2834        rsp->uncorrectable_errors = tmp < 0x100 ? (tmp & 0xff) : 0xff;
2835
2836        vlinfo = &rsp->vls[0];
2837        vfi = 0;
2838        /* The vl_select_mask has been checked above, and we know
2839         * that it contains only entries which represent valid VLs.
2840         * So in the for_each_set_bit() loop below, we don't need
2841         * any additional checks for vl.
2842         */
2843        for_each_set_bit(vl, &vl_select_mask, BITS_PER_LONG) {
2844                memset(vlinfo, 0, sizeof(*vlinfo));
2845
2846                tmp = read_dev_cntr(dd, C_DC_RX_FLIT_VL, idx_from_vl(vl));
2847                rsp->vls[vfi].port_vl_rcv_data = cpu_to_be64(tmp);
2848
2849                rsp->vls[vfi].port_vl_rcv_pkts =
2850                        cpu_to_be64(read_dev_cntr(dd, C_DC_RX_PKT_VL,
2851                                                  idx_from_vl(vl)));
2852
2853                rsp->vls[vfi].port_vl_xmit_data =
2854                        cpu_to_be64(read_port_cntr(ppd, C_TX_FLIT_VL,
2855                                                   idx_from_vl(vl)));
2856
2857                rsp->vls[vfi].port_vl_xmit_pkts =
2858                        cpu_to_be64(read_port_cntr(ppd, C_TX_PKT_VL,
2859                                                   idx_from_vl(vl)));
2860                /*
2861                 * Convert PortVlXmitWait counter from TXE cycle
2862                 * times to flit times.
2863                 */
2864                rsp->vls[vfi].port_vl_xmit_wait =
2865                        cpu_to_be64(get_xmit_wait_counters(ppd, link_width,
2866                                                           link_speed,
2867                                                           idx_from_vl(vl)));
2868
2869                rsp->vls[vfi].port_vl_rcv_fecn =
2870                        cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_FCN_VL,
2871                                                  idx_from_vl(vl)));
2872
2873                rsp->vls[vfi].port_vl_rcv_becn =
2874                        cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_BCN_VL,
2875                                                  idx_from_vl(vl)));
2876
2877                rsp->vls[vfi].port_vl_xmit_discards =
2878                        cpu_to_be64(read_port_cntr(ppd, C_SW_XMIT_DSCD_VL,
2879                                                   idx_from_vl(vl)));
2880                vlinfo++;
2881                vfi++;
2882        }
2883
2884        a0_portstatus(ppd, rsp);
2885
2886        if (resp_len)
2887                *resp_len += response_data_size;
2888
2889        return reply((struct ib_mad_hdr *)pmp);
2890}
2891
2892static u64 get_error_counter_summary(struct ib_device *ibdev, u8 port,
2893                                     u8 res_lli, u8 res_ler)
2894{
2895        struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
2896        struct hfi1_ibport *ibp = to_iport(ibdev, port);
2897        struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
2898        u64 error_counter_summary = 0, tmp;
2899
2900        error_counter_summary += read_port_cntr(ppd, C_SW_RCV_CSTR_ERR,
2901                                                CNTR_INVALID_VL);
2902        /* port_rcv_switch_relay_errors is 0 for HFIs */
2903        error_counter_summary += read_port_cntr(ppd, C_SW_XMIT_DSCD,
2904                                                CNTR_INVALID_VL);
2905        error_counter_summary += read_port_cntr(ppd, C_SW_XMIT_CSTR_ERR,
2906                                                CNTR_INVALID_VL);
2907        error_counter_summary += read_dev_cntr(dd, C_DC_RMT_PHY_ERR,
2908                                               CNTR_INVALID_VL);
2909        /* local link integrity must be right-shifted by the lli resolution */
2910        error_counter_summary += (read_dev_cntr(dd, C_DC_RX_REPLAY,
2911                                                CNTR_INVALID_VL) >> res_lli);
2912        /* link error recovery must b right-shifted by the ler resolution */
2913        tmp = read_dev_cntr(dd, C_DC_SEQ_CRC_CNT, CNTR_INVALID_VL);
2914        tmp += read_dev_cntr(dd, C_DC_REINIT_FROM_PEER_CNT, CNTR_INVALID_VL);
2915        error_counter_summary += (tmp >> res_ler);
2916        error_counter_summary += read_dev_cntr(dd, C_DC_RCV_ERR,
2917                                               CNTR_INVALID_VL);
2918        error_counter_summary += read_dev_cntr(dd, C_RCV_OVF, CNTR_INVALID_VL);
2919        error_counter_summary += read_dev_cntr(dd, C_DC_FM_CFG_ERR,
2920                                               CNTR_INVALID_VL);
2921        /* ppd->link_downed is a 32-bit value */
2922        error_counter_summary += read_port_cntr(ppd, C_SW_LINK_DOWN,
2923                                                CNTR_INVALID_VL);
2924        tmp = read_dev_cntr(dd, C_DC_UNC_ERR, CNTR_INVALID_VL);
2925        /* this is an 8-bit quantity */
2926        error_counter_summary += tmp < 0x100 ? (tmp & 0xff) : 0xff;
2927
2928        return error_counter_summary;
2929}
2930
2931static void a0_datacounters(struct hfi1_pportdata *ppd, struct _port_dctrs *rsp)
2932{
2933        if (!is_bx(ppd->dd)) {
2934                unsigned long vl;
2935                u64 sum_vl_xmit_wait = 0;
2936                unsigned long vl_all_mask = VL_MASK_ALL;
2937
2938                for_each_set_bit(vl, &vl_all_mask, BITS_PER_LONG) {
2939                        u64 tmp = sum_vl_xmit_wait +
2940                                  read_port_cntr(ppd, C_TX_WAIT_VL,
2941                                                 idx_from_vl(vl));
2942                        if (tmp < sum_vl_xmit_wait) {
2943                                /* we wrapped */
2944                                sum_vl_xmit_wait = (u64)~0;
2945                                break;
2946                        }
2947                        sum_vl_xmit_wait = tmp;
2948                }
2949                if (be64_to_cpu(rsp->port_xmit_wait) > sum_vl_xmit_wait)
2950                        rsp->port_xmit_wait = cpu_to_be64(sum_vl_xmit_wait);
2951        }
2952}
2953
2954static void pma_get_opa_port_dctrs(struct ib_device *ibdev,
2955                                   struct _port_dctrs *rsp)
2956{
2957        struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
2958
2959        rsp->port_xmit_data = cpu_to_be64(read_dev_cntr(dd, C_DC_XMIT_FLITS,
2960                                                CNTR_INVALID_VL));
2961        rsp->port_rcv_data = cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_FLITS,
2962                                                CNTR_INVALID_VL));
2963        rsp->port_xmit_pkts = cpu_to_be64(read_dev_cntr(dd, C_DC_XMIT_PKTS,
2964                                                CNTR_INVALID_VL));
2965        rsp->port_rcv_pkts = cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_PKTS,
2966                                                CNTR_INVALID_VL));
2967        rsp->port_multicast_xmit_pkts =
2968                cpu_to_be64(read_dev_cntr(dd, C_DC_MC_XMIT_PKTS,
2969                                          CNTR_INVALID_VL));
2970        rsp->port_multicast_rcv_pkts =
2971                cpu_to_be64(read_dev_cntr(dd, C_DC_MC_RCV_PKTS,
2972                                          CNTR_INVALID_VL));
2973}
2974
2975static int pma_get_opa_datacounters(struct opa_pma_mad *pmp,
2976                                    struct ib_device *ibdev,
2977                                    u8 port, u32 *resp_len)
2978{
2979        struct opa_port_data_counters_msg *req =
2980                (struct opa_port_data_counters_msg *)pmp->data;
2981        struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
2982        struct hfi1_ibport *ibp = to_iport(ibdev, port);
2983        struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
2984        struct _port_dctrs *rsp;
2985        struct _vls_dctrs *vlinfo;
2986        size_t response_data_size;
2987        u32 num_ports;
2988        u8 lq, num_vls;
2989        u8 res_lli, res_ler;
2990        u64 port_mask;
2991        u8 port_num;
2992        unsigned long vl;
2993        unsigned long vl_select_mask;
2994        int vfi;
2995        u16 link_width;
2996        u16 link_speed;
2997
2998        num_ports = be32_to_cpu(pmp->mad_hdr.attr_mod) >> 24;
2999        num_vls = hweight32(be32_to_cpu(req->vl_select_mask));
3000        vl_select_mask = be32_to_cpu(req->vl_select_mask);
3001        res_lli = (u8)(be32_to_cpu(req->resolution) & MSK_LLI) >> MSK_LLI_SFT;
3002        res_lli = res_lli ? res_lli + ADD_LLI : 0;
3003        res_ler = (u8)(be32_to_cpu(req->resolution) & MSK_LER) >> MSK_LER_SFT;
3004        res_ler = res_ler ? res_ler + ADD_LER : 0;
3005
3006        if (num_ports != 1 || (vl_select_mask & ~VL_MASK_ALL)) {
3007                pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
3008                return reply((struct ib_mad_hdr *)pmp);
3009        }
3010
3011        /* Sanity check */
3012        response_data_size = struct_size(req, port[0].vls, num_vls);
3013
3014        if (response_data_size > sizeof(pmp->data)) {
3015                pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
3016                return reply((struct ib_mad_hdr *)pmp);
3017        }
3018
3019        /*
3020         * The bit set in the mask needs to be consistent with the
3021         * port the request came in on.
3022         */
3023        port_mask = be64_to_cpu(req->port_select_mask[3]);
3024        port_num = find_first_bit((unsigned long *)&port_mask,
3025                                  sizeof(port_mask) * 8);
3026
3027        if (port_num != port) {
3028                pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
3029                return reply((struct ib_mad_hdr *)pmp);
3030        }
3031
3032        rsp = &req->port[0];
3033        memset(rsp, 0, sizeof(*rsp));
3034
3035        rsp->port_number = port;
3036        /*
3037         * Note that link_quality_indicator is a 32 bit quantity in
3038         * 'datacounters' queries (as opposed to 'portinfo' queries,
3039         * where it's a byte).
3040         */
3041        hfi1_read_link_quality(dd, &lq);
3042        rsp->link_quality_indicator = cpu_to_be32((u32)lq);
3043        pma_get_opa_port_dctrs(ibdev, rsp);
3044
3045        /*
3046         * Convert PortXmitWait counter from TXE
3047         * cycle times to flit times.
3048         */
3049        link_width =
3050                tx_link_width(ppd->link_width_downgrade_tx_active);
3051        link_speed = get_link_speed(ppd->link_speed_active);
3052        rsp->port_xmit_wait =
3053                cpu_to_be64(get_xmit_wait_counters(ppd, link_width,
3054                                                   link_speed, C_VL_COUNT));
3055        rsp->port_rcv_fecn =
3056                cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_FCN, CNTR_INVALID_VL));
3057        rsp->port_rcv_becn =
3058                cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_BCN, CNTR_INVALID_VL));
3059        rsp->port_error_counter_summary =
3060                cpu_to_be64(get_error_counter_summary(ibdev, port,
3061                                                      res_lli, res_ler));
3062
3063        vlinfo = &rsp->vls[0];
3064        vfi = 0;
3065        /* The vl_select_mask has been checked above, and we know
3066         * that it contains only entries which represent valid VLs.
3067         * So in the for_each_set_bit() loop below, we don't need
3068         * any additional checks for vl.
3069         */
3070        for_each_set_bit(vl, &vl_select_mask, BITS_PER_LONG) {
3071                memset(vlinfo, 0, sizeof(*vlinfo));
3072
3073                rsp->vls[vfi].port_vl_xmit_data =
3074                        cpu_to_be64(read_port_cntr(ppd, C_TX_FLIT_VL,
3075                                                   idx_from_vl(vl)));
3076
3077                rsp->vls[vfi].port_vl_rcv_data =
3078                        cpu_to_be64(read_dev_cntr(dd, C_DC_RX_FLIT_VL,
3079                                                  idx_from_vl(vl)));
3080
3081                rsp->vls[vfi].port_vl_xmit_pkts =
3082                        cpu_to_be64(read_port_cntr(ppd, C_TX_PKT_VL,
3083                                                   idx_from_vl(vl)));
3084
3085                rsp->vls[vfi].port_vl_rcv_pkts =
3086                        cpu_to_be64(read_dev_cntr(dd, C_DC_RX_PKT_VL,
3087                                                  idx_from_vl(vl)));
3088
3089                /*
3090                 * Convert PortVlXmitWait counter from TXE
3091                 * cycle times to flit times.
3092                 */
3093                rsp->vls[vfi].port_vl_xmit_wait =
3094                        cpu_to_be64(get_xmit_wait_counters(ppd, link_width,
3095                                                           link_speed,
3096                                                           idx_from_vl(vl)));
3097
3098                rsp->vls[vfi].port_vl_rcv_fecn =
3099                        cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_FCN_VL,
3100                                                  idx_from_vl(vl)));
3101                rsp->vls[vfi].port_vl_rcv_becn =
3102                        cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_BCN_VL,
3103                                                  idx_from_vl(vl)));
3104
3105                /* rsp->port_vl_xmit_time_cong is 0 for HFIs */
3106                /* rsp->port_vl_xmit_wasted_bw ??? */
3107                /* port_vl_xmit_wait_data - TXE (table 13-9 HFI spec) ???
3108                 * does this differ from rsp->vls[vfi].port_vl_xmit_wait
3109                 */
3110                /*rsp->vls[vfi].port_vl_mark_fecn =
3111                 *      cpu_to_be64(read_csr(dd, DCC_PRF_PORT_VL_MARK_FECN_CNT
3112                 *              + offset));
3113                 */
3114                vlinfo++;
3115                vfi++;
3116        }
3117
3118        a0_datacounters(ppd, rsp);
3119
3120        if (resp_len)
3121                *resp_len += response_data_size;
3122
3123        return reply((struct ib_mad_hdr *)pmp);
3124}
3125
3126static int pma_get_ib_portcounters_ext(struct ib_pma_mad *pmp,
3127                                       struct ib_device *ibdev, u8 port)
3128{
3129        struct ib_pma_portcounters_ext *p = (struct ib_pma_portcounters_ext *)
3130                                                pmp->data;
3131        struct _port_dctrs rsp;
3132
3133        if (pmp->mad_hdr.attr_mod != 0 || p->port_select != port) {
3134                pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
3135                goto bail;
3136        }
3137
3138        memset(&rsp, 0, sizeof(rsp));
3139        pma_get_opa_port_dctrs(ibdev, &rsp);
3140
3141        p->port_xmit_data = rsp.port_xmit_data;
3142        p->port_rcv_data = rsp.port_rcv_data;
3143        p->port_xmit_packets = rsp.port_xmit_pkts;
3144        p->port_rcv_packets = rsp.port_rcv_pkts;
3145        p->port_unicast_xmit_packets = 0;
3146        p->port_unicast_rcv_packets =  0;
3147        p->port_multicast_xmit_packets = rsp.port_multicast_xmit_pkts;
3148        p->port_multicast_rcv_packets = rsp.port_multicast_rcv_pkts;
3149
3150bail:
3151        return reply((struct ib_mad_hdr *)pmp);
3152}
3153
3154static void pma_get_opa_port_ectrs(struct ib_device *ibdev,
3155                                   struct _port_ectrs *rsp, u8 port)
3156{
3157        u64 tmp, tmp2;
3158        struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
3159        struct hfi1_ibport *ibp = to_iport(ibdev, port);
3160        struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
3161
3162        tmp = read_dev_cntr(dd, C_DC_SEQ_CRC_CNT, CNTR_INVALID_VL);
3163        tmp2 = tmp + read_dev_cntr(dd, C_DC_REINIT_FROM_PEER_CNT,
3164                                        CNTR_INVALID_VL);
3165        if (tmp2 > (u32)UINT_MAX || tmp2 < tmp) {
3166                /* overflow/wrapped */
3167                rsp->link_error_recovery = cpu_to_be32(~0);
3168        } else {
3169                rsp->link_error_recovery = cpu_to_be32(tmp2);
3170        }
3171
3172        rsp->link_downed = cpu_to_be32(read_port_cntr(ppd, C_SW_LINK_DOWN,
3173                                                CNTR_INVALID_VL));
3174        rsp->port_rcv_errors =
3175                cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_ERR, CNTR_INVALID_VL));
3176        rsp->port_rcv_remote_physical_errors =
3177                cpu_to_be64(read_dev_cntr(dd, C_DC_RMT_PHY_ERR,
3178                                          CNTR_INVALID_VL));
3179        rsp->port_rcv_switch_relay_errors = 0;
3180        rsp->port_xmit_discards =
3181                cpu_to_be64(read_port_cntr(ppd, C_SW_XMIT_DSCD,
3182                                           CNTR_INVALID_VL));
3183        rsp->port_xmit_constraint_errors =
3184                cpu_to_be64(read_port_cntr(ppd, C_SW_XMIT_CSTR_ERR,
3185                                           CNTR_INVALID_VL));
3186        rsp->port_rcv_constraint_errors =
3187                cpu_to_be64(read_port_cntr(ppd, C_SW_RCV_CSTR_ERR,
3188                                           CNTR_INVALID_VL));
3189        rsp->local_link_integrity_errors =
3190                cpu_to_be64(read_dev_cntr(dd, C_DC_RX_REPLAY,
3191                                          CNTR_INVALID_VL));
3192        rsp->excessive_buffer_overruns =
3193                cpu_to_be64(read_dev_cntr(dd, C_RCV_OVF, CNTR_INVALID_VL));
3194}
3195
3196static int pma_get_opa_porterrors(struct opa_pma_mad *pmp,
3197                                  struct ib_device *ibdev,
3198                                  u8 port, u32 *resp_len)
3199{
3200        size_t response_data_size;
3201        struct _port_ectrs *rsp;
3202        u8 port_num;
3203        struct opa_port_error_counters64_msg *req;
3204        struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
3205        u32 num_ports;
3206        u8 num_pslm;
3207        u8 num_vls;
3208        struct hfi1_ibport *ibp;
3209        struct hfi1_pportdata *ppd;
3210        struct _vls_ectrs *vlinfo;
3211        unsigned long vl;
3212        u64 port_mask, tmp;
3213        unsigned long vl_select_mask;
3214        int vfi;
3215
3216        req = (struct opa_port_error_counters64_msg *)pmp->data;
3217
3218        num_ports = be32_to_cpu(pmp->mad_hdr.attr_mod) >> 24;
3219
3220        num_pslm = hweight64(be64_to_cpu(req->port_select_mask[3]));
3221        num_vls = hweight32(be32_to_cpu(req->vl_select_mask));
3222
3223        if (num_ports != 1 || num_ports != num_pslm) {
3224                pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
3225                return reply((struct ib_mad_hdr *)pmp);
3226        }
3227
3228        response_data_size = struct_size(req, port[0].vls, num_vls);
3229
3230        if (response_data_size > sizeof(pmp->data)) {
3231                pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
3232                return reply((struct ib_mad_hdr *)pmp);
3233        }
3234        /*
3235         * The bit set in the mask needs to be consistent with the
3236         * port the request came in on.
3237         */
3238        port_mask = be64_to_cpu(req->port_select_mask[3]);
3239        port_num = find_first_bit((unsigned long *)&port_mask,
3240                                  sizeof(port_mask) * 8);
3241
3242        if (port_num != port) {
3243                pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
3244                return reply((struct ib_mad_hdr *)pmp);
3245        }
3246
3247        rsp = &req->port[0];
3248
3249        ibp = to_iport(ibdev, port_num);
3250        ppd = ppd_from_ibp(ibp);
3251
3252        memset(rsp, 0, sizeof(*rsp));
3253        rsp->port_number = port_num;
3254
3255        pma_get_opa_port_ectrs(ibdev, rsp, port_num);
3256
3257        rsp->port_rcv_remote_physical_errors =
3258                cpu_to_be64(read_dev_cntr(dd, C_DC_RMT_PHY_ERR,
3259                                          CNTR_INVALID_VL));
3260        rsp->fm_config_errors =
3261                cpu_to_be64(read_dev_cntr(dd, C_DC_FM_CFG_ERR,
3262                                          CNTR_INVALID_VL));
3263        tmp = read_dev_cntr(dd, C_DC_UNC_ERR, CNTR_INVALID_VL);
3264
3265        rsp->uncorrectable_errors = tmp < 0x100 ? (tmp & 0xff) : 0xff;
3266        rsp->port_rcv_errors =
3267                cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_ERR, CNTR_INVALID_VL));
3268        vlinfo = &rsp->vls[0];
3269        vfi = 0;
3270        vl_select_mask = be32_to_cpu(req->vl_select_mask);
3271        for_each_set_bit(vl, &vl_select_mask, BITS_PER_LONG) {
3272                memset(vlinfo, 0, sizeof(*vlinfo));
3273                rsp->vls[vfi].port_vl_xmit_discards =
3274                        cpu_to_be64(read_port_cntr(ppd, C_SW_XMIT_DSCD_VL,
3275                                                   idx_from_vl(vl)));
3276                vlinfo += 1;
3277                vfi++;
3278        }
3279
3280        if (resp_len)
3281                *resp_len += response_data_size;
3282
3283        return reply((struct ib_mad_hdr *)pmp);
3284}
3285
3286static int pma_get_ib_portcounters(struct ib_pma_mad *pmp,
3287                                   struct ib_device *ibdev, u8 port)
3288{
3289        struct ib_pma_portcounters *p = (struct ib_pma_portcounters *)
3290                pmp->data;
3291        struct _port_ectrs rsp;
3292        u64 temp_link_overrun_errors;
3293        u64 temp_64;
3294        u32 temp_32;
3295
3296        memset(&rsp, 0, sizeof(rsp));
3297        pma_get_opa_port_ectrs(ibdev, &rsp, port);
3298
3299        if (pmp->mad_hdr.attr_mod != 0 || p->port_select != port) {
3300                pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
3301                goto bail;
3302        }
3303
3304        p->symbol_error_counter = 0; /* N/A for OPA */
3305
3306        temp_32 = be32_to_cpu(rsp.link_error_recovery);
3307        if (temp_32 > 0xFFUL)
3308                p->link_error_recovery_counter = 0xFF;
3309        else
3310                p->link_error_recovery_counter = (u8)temp_32;
3311
3312        temp_32 = be32_to_cpu(rsp.link_downed);
3313        if (temp_32 > 0xFFUL)
3314                p->link_downed_counter = 0xFF;
3315        else
3316                p->link_downed_counter = (u8)temp_32;
3317
3318        temp_64 = be64_to_cpu(rsp.port_rcv_errors);
3319        if (temp_64 > 0xFFFFUL)
3320                p->port_rcv_errors = cpu_to_be16(0xFFFF);
3321        else
3322                p->port_rcv_errors = cpu_to_be16((u16)temp_64);
3323
3324        temp_64 = be64_to_cpu(rsp.port_rcv_remote_physical_errors);
3325        if (temp_64 > 0xFFFFUL)
3326                p->port_rcv_remphys_errors = cpu_to_be16(0xFFFF);
3327        else
3328                p->port_rcv_remphys_errors = cpu_to_be16((u16)temp_64);
3329
3330        temp_64 = be64_to_cpu(rsp.port_rcv_switch_relay_errors);
3331        p->port_rcv_switch_relay_errors = cpu_to_be16((u16)temp_64);
3332
3333        temp_64 = be64_to_cpu(rsp.port_xmit_discards);
3334        if (temp_64 > 0xFFFFUL)
3335                p->port_xmit_discards = cpu_to_be16(0xFFFF);
3336        else
3337                p->port_xmit_discards = cpu_to_be16((u16)temp_64);
3338
3339        temp_64 = be64_to_cpu(rsp.port_xmit_constraint_errors);
3340        if (temp_64 > 0xFFUL)
3341                p->port_xmit_constraint_errors = 0xFF;
3342        else
3343                p->port_xmit_constraint_errors = (u8)temp_64;
3344
3345        temp_64 = be64_to_cpu(rsp.port_rcv_constraint_errors);
3346        if (temp_64 > 0xFFUL)
3347                p->port_rcv_constraint_errors = 0xFFUL;
3348        else
3349                p->port_rcv_constraint_errors = (u8)temp_64;
3350
3351        /* LocalLink: 7:4, BufferOverrun: 3:0 */
3352        temp_64 = be64_to_cpu(rsp.local_link_integrity_errors);
3353        if (temp_64 > 0xFUL)
3354                temp_64 = 0xFUL;
3355
3356        temp_link_overrun_errors = temp_64 << 4;
3357
3358        temp_64 = be64_to_cpu(rsp.excessive_buffer_overruns);
3359        if (temp_64 > 0xFUL)
3360                temp_64 = 0xFUL;
3361        temp_link_overrun_errors |= temp_64;
3362
3363        p->link_overrun_errors = (u8)temp_link_overrun_errors;
3364
3365        p->vl15_dropped = 0; /* N/A for OPA */
3366
3367bail:
3368        return reply((struct ib_mad_hdr *)pmp);
3369}
3370
3371static int pma_get_opa_errorinfo(struct opa_pma_mad *pmp,
3372                                 struct ib_device *ibdev,
3373                                 u8 port, u32 *resp_len)
3374{
3375        size_t response_data_size;
3376        struct _port_ei *rsp;
3377        struct opa_port_error_info_msg *req;
3378        struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
3379        u64 port_mask;
3380        u32 num_ports;
3381        u8 port_num;
3382        u8 num_pslm;
3383        u64 reg;
3384
3385        req = (struct opa_port_error_info_msg *)pmp->data;
3386        rsp = &req->port[0];
3387
3388        num_ports = OPA_AM_NPORT(be32_to_cpu(pmp->mad_hdr.attr_mod));
3389        num_pslm = hweight64(be64_to_cpu(req->port_select_mask[3]));
3390
3391        memset(rsp, 0, sizeof(*rsp));
3392
3393        if (num_ports != 1 || num_ports != num_pslm) {
3394                pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
3395                return reply((struct ib_mad_hdr *)pmp);
3396        }
3397
3398        /* Sanity check */
3399        response_data_size = sizeof(struct opa_port_error_info_msg);
3400
3401        if (response_data_size > sizeof(pmp->data)) {
3402                pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
3403                return reply((struct ib_mad_hdr *)pmp);
3404        }
3405
3406        /*
3407         * The bit set in the mask needs to be consistent with the port
3408         * the request came in on.
3409         */
3410        port_mask = be64_to_cpu(req->port_select_mask[3]);
3411        port_num = find_first_bit((unsigned long *)&port_mask,
3412                                  sizeof(port_mask) * 8);
3413
3414        if (port_num != port) {
3415                pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
3416                return reply((struct ib_mad_hdr *)pmp);
3417        }
3418        rsp->port_number = port;
3419
3420        /* PortRcvErrorInfo */
3421        rsp->port_rcv_ei.status_and_code =
3422                dd->err_info_rcvport.status_and_code;
3423        memcpy(&rsp->port_rcv_ei.ei.ei1to12.packet_flit1,
3424               &dd->err_info_rcvport.packet_flit1, sizeof(u64));
3425        memcpy(&rsp->port_rcv_ei.ei.ei1to12.packet_flit2,
3426               &dd->err_info_rcvport.packet_flit2, sizeof(u64));
3427
3428        /* ExcessiverBufferOverrunInfo */
3429        reg = read_csr(dd, RCV_ERR_INFO);
3430        if (reg & RCV_ERR_INFO_RCV_EXCESS_BUFFER_OVERRUN_SMASK) {
3431                /*
3432                 * if the RcvExcessBufferOverrun bit is set, save SC of
3433                 * first pkt that encountered an excess buffer overrun
3434                 */
3435                u8 tmp = (u8)reg;
3436
3437                tmp &=  RCV_ERR_INFO_RCV_EXCESS_BUFFER_OVERRUN_SC_SMASK;
3438                tmp <<= 2;
3439                rsp->excessive_buffer_overrun_ei.status_and_sc = tmp;
3440                /* set the status bit */
3441                rsp->excessive_buffer_overrun_ei.status_and_sc |= 0x80;
3442        }
3443
3444        rsp->port_xmit_constraint_ei.status =
3445                dd->err_info_xmit_constraint.status;
3446        rsp->port_xmit_constraint_ei.pkey =
3447                cpu_to_be16(dd->err_info_xmit_constraint.pkey);
3448        rsp->port_xmit_constraint_ei.slid =
3449                cpu_to_be32(dd->err_info_xmit_constraint.slid);
3450
3451        rsp->port_rcv_constraint_ei.status =
3452                dd->err_info_rcv_constraint.status;
3453        rsp->port_rcv_constraint_ei.pkey =
3454                cpu_to_be16(dd->err_info_rcv_constraint.pkey);
3455        rsp->port_rcv_constraint_ei.slid =
3456                cpu_to_be32(dd->err_info_rcv_constraint.slid);
3457
3458        /* UncorrectableErrorInfo */
3459        rsp->uncorrectable_ei.status_and_code = dd->err_info_uncorrectable;
3460
3461        /* FMConfigErrorInfo */
3462        rsp->fm_config_ei.status_and_code = dd->err_info_fmconfig;
3463
3464        if (resp_len)
3465                *resp_len += response_data_size;
3466
3467        return reply((struct ib_mad_hdr *)pmp);
3468}
3469
3470static int pma_set_opa_portstatus(struct opa_pma_mad *pmp,
3471                                  struct ib_device *ibdev,
3472                                  u8 port, u32 *resp_len)
3473{
3474        struct opa_clear_port_status *req =
3475                (struct opa_clear_port_status *)pmp->data;
3476        struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
3477        struct hfi1_ibport *ibp = to_iport(ibdev, port);
3478        struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
3479        u32 nports = be32_to_cpu(pmp->mad_hdr.attr_mod) >> 24;
3480        u64 portn = be64_to_cpu(req->port_select_mask[3]);
3481        u32 counter_select = be32_to_cpu(req->counter_select_mask);
3482        unsigned long vl_select_mask = VL_MASK_ALL; /* clear all per-vl cnts */
3483        unsigned long vl;
3484
3485        if ((nports != 1) || (portn != 1 << port)) {
3486                pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
3487                return reply((struct ib_mad_hdr *)pmp);
3488        }
3489        /*
3490         * only counters returned by pma_get_opa_portstatus() are
3491         * handled, so when pma_get_opa_portstatus() gets a fix,
3492         * the corresponding change should be made here as well.
3493         */
3494
3495        if (counter_select & CS_PORT_XMIT_DATA)
3496                write_dev_cntr(dd, C_DC_XMIT_FLITS, CNTR_INVALID_VL, 0);
3497
3498        if (counter_select & CS_PORT_RCV_DATA)
3499                write_dev_cntr(dd, C_DC_RCV_FLITS, CNTR_INVALID_VL, 0);
3500
3501        if (counter_select & CS_PORT_XMIT_PKTS)
3502                write_dev_cntr(dd, C_DC_XMIT_PKTS, CNTR_INVALID_VL, 0);
3503
3504        if (counter_select & CS_PORT_RCV_PKTS)
3505                write_dev_cntr(dd, C_DC_RCV_PKTS, CNTR_INVALID_VL, 0);
3506
3507        if (counter_select & CS_PORT_MCAST_XMIT_PKTS)
3508                write_dev_cntr(dd, C_DC_MC_XMIT_PKTS, CNTR_INVALID_VL, 0);
3509
3510        if (counter_select & CS_PORT_MCAST_RCV_PKTS)
3511                write_dev_cntr(dd, C_DC_MC_RCV_PKTS, CNTR_INVALID_VL, 0);
3512
3513        if (counter_select & CS_PORT_XMIT_WAIT) {
3514                write_port_cntr(ppd, C_TX_WAIT, CNTR_INVALID_VL, 0);
3515                ppd->port_vl_xmit_wait_last[C_VL_COUNT] = 0;
3516                ppd->vl_xmit_flit_cnt[C_VL_COUNT] = 0;
3517        }
3518        /* ignore cs_sw_portCongestion for HFIs */
3519
3520        if (counter_select & CS_PORT_RCV_FECN)
3521                write_dev_cntr(dd, C_DC_RCV_FCN, CNTR_INVALID_VL, 0);
3522
3523        if (counter_select & CS_PORT_RCV_BECN)
3524                write_dev_cntr(dd, C_DC_RCV_BCN, CNTR_INVALID_VL, 0);
3525
3526        /* ignore cs_port_xmit_time_cong for HFIs */
3527        /* ignore cs_port_xmit_wasted_bw for now */
3528        /* ignore cs_port_xmit_wait_data for now */
3529        if (counter_select & CS_PORT_RCV_BUBBLE)
3530                write_dev_cntr(dd, C_DC_RCV_BBL, CNTR_INVALID_VL, 0);
3531
3532        /* Only applicable for switch */
3533        /* if (counter_select & CS_PORT_MARK_FECN)
3534         *      write_csr(dd, DCC_PRF_PORT_MARK_FECN_CNT, 0);
3535         */
3536
3537        if (counter_select & CS_PORT_RCV_CONSTRAINT_ERRORS)
3538                write_port_cntr(ppd, C_SW_RCV_CSTR_ERR, CNTR_INVALID_VL, 0);
3539
3540        /* ignore cs_port_rcv_switch_relay_errors for HFIs */
3541        if (counter_select & CS_PORT_XMIT_DISCARDS)
3542                write_port_cntr(ppd, C_SW_XMIT_DSCD, CNTR_INVALID_VL, 0);
3543
3544        if (counter_select & CS_PORT_XMIT_CONSTRAINT_ERRORS)
3545                write_port_cntr(ppd, C_SW_XMIT_CSTR_ERR, CNTR_INVALID_VL, 0);
3546
3547        if (counter_select & CS_PORT_RCV_REMOTE_PHYSICAL_ERRORS)
3548                write_dev_cntr(dd, C_DC_RMT_PHY_ERR, CNTR_INVALID_VL, 0);
3549
3550        if (counter_select & CS_LOCAL_LINK_INTEGRITY_ERRORS)
3551                write_dev_cntr(dd, C_DC_RX_REPLAY, CNTR_INVALID_VL, 0);
3552
3553        if (counter_select & CS_LINK_ERROR_RECOVERY) {
3554                write_dev_cntr(dd, C_DC_SEQ_CRC_CNT, CNTR_INVALID_VL, 0);
3555                write_dev_cntr(dd, C_DC_REINIT_FROM_PEER_CNT,
3556                               CNTR_INVALID_VL, 0);
3557        }
3558
3559        if (counter_select & CS_PORT_RCV_ERRORS)
3560                write_dev_cntr(dd, C_DC_RCV_ERR, CNTR_INVALID_VL, 0);
3561
3562        if (counter_select & CS_EXCESSIVE_BUFFER_OVERRUNS) {
3563                write_dev_cntr(dd, C_RCV_OVF, CNTR_INVALID_VL, 0);
3564                dd->rcv_ovfl_cnt = 0;
3565        }
3566
3567        if (counter_select & CS_FM_CONFIG_ERRORS)
3568                write_dev_cntr(dd, C_DC_FM_CFG_ERR, CNTR_INVALID_VL, 0);
3569
3570        if (counter_select & CS_LINK_DOWNED)
3571                write_port_cntr(ppd, C_SW_LINK_DOWN, CNTR_INVALID_VL, 0);
3572
3573        if (counter_select & CS_UNCORRECTABLE_ERRORS)
3574                write_dev_cntr(dd, C_DC_UNC_ERR, CNTR_INVALID_VL, 0);
3575
3576        for_each_set_bit(vl, &vl_select_mask, BITS_PER_LONG) {
3577                if (counter_select & CS_PORT_XMIT_DATA)
3578                        write_port_cntr(ppd, C_TX_FLIT_VL, idx_from_vl(vl), 0);
3579
3580                if (counter_select & CS_PORT_RCV_DATA)
3581                        write_dev_cntr(dd, C_DC_RX_FLIT_VL, idx_from_vl(vl), 0);
3582
3583                if (counter_select & CS_PORT_XMIT_PKTS)
3584                        write_port_cntr(ppd, C_TX_PKT_VL, idx_from_vl(vl), 0);
3585
3586                if (counter_select & CS_PORT_RCV_PKTS)
3587                        write_dev_cntr(dd, C_DC_RX_PKT_VL, idx_from_vl(vl), 0);
3588
3589                if (counter_select & CS_PORT_XMIT_WAIT) {
3590                        write_port_cntr(ppd, C_TX_WAIT_VL, idx_from_vl(vl), 0);
3591                        ppd->port_vl_xmit_wait_last[idx_from_vl(vl)] = 0;
3592                        ppd->vl_xmit_flit_cnt[idx_from_vl(vl)] = 0;
3593                }
3594
3595                /* sw_port_vl_congestion is 0 for HFIs */
3596                if (counter_select & CS_PORT_RCV_FECN)
3597                        write_dev_cntr(dd, C_DC_RCV_FCN_VL, idx_from_vl(vl), 0);
3598
3599                if (counter_select & CS_PORT_RCV_BECN)
3600                        write_dev_cntr(dd, C_DC_RCV_BCN_VL, idx_from_vl(vl), 0);
3601
3602                /* port_vl_xmit_time_cong is 0 for HFIs */
3603                /* port_vl_xmit_wasted_bw ??? */
3604                /* port_vl_xmit_wait_data - TXE (table 13-9 HFI spec) ??? */
3605                if (counter_select & CS_PORT_RCV_BUBBLE)
3606                        write_dev_cntr(dd, C_DC_RCV_BBL_VL, idx_from_vl(vl), 0);
3607
3608                /* if (counter_select & CS_PORT_MARK_FECN)
3609                 *     write_csr(dd, DCC_PRF_PORT_VL_MARK_FECN_CNT + offset, 0);
3610                 */
3611                if (counter_select & C_SW_XMIT_DSCD_VL)
3612                        write_port_cntr(ppd, C_SW_XMIT_DSCD_VL,
3613                                        idx_from_vl(vl), 0);
3614        }
3615
3616        if (resp_len)
3617                *resp_len += sizeof(*req);
3618
3619        return reply((struct ib_mad_hdr *)pmp);
3620}
3621
3622static int pma_set_opa_errorinfo(struct opa_pma_mad *pmp,
3623                                 struct ib_device *ibdev,
3624                                 u8 port, u32 *resp_len)
3625{
3626        struct _port_ei *rsp;
3627        struct opa_port_error_info_msg *req;
3628        struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
3629        u64 port_mask;
3630        u32 num_ports;
3631        u8 port_num;
3632        u8 num_pslm;
3633        u32 error_info_select;
3634
3635        req = (struct opa_port_error_info_msg *)pmp->data;
3636        rsp = &req->port[0];
3637
3638        num_ports = OPA_AM_NPORT(be32_to_cpu(pmp->mad_hdr.attr_mod));
3639        num_pslm = hweight64(be64_to_cpu(req->port_select_mask[3]));
3640
3641        memset(rsp, 0, sizeof(*rsp));
3642
3643        if (num_ports != 1 || num_ports != num_pslm) {
3644                pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
3645                return reply((struct ib_mad_hdr *)pmp);
3646        }
3647
3648        /*
3649         * The bit set in the mask needs to be consistent with the port
3650         * the request came in on.
3651         */
3652        port_mask = be64_to_cpu(req->port_select_mask[3]);
3653        port_num = find_first_bit((unsigned long *)&port_mask,
3654                                  sizeof(port_mask) * 8);
3655
3656        if (port_num != port) {
3657                pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
3658                return reply((struct ib_mad_hdr *)pmp);
3659        }
3660
3661        error_info_select = be32_to_cpu(req->error_info_select_mask);
3662
3663        /* PortRcvErrorInfo */
3664        if (error_info_select & ES_PORT_RCV_ERROR_INFO)
3665                /* turn off status bit */
3666                dd->err_info_rcvport.status_and_code &= ~OPA_EI_STATUS_SMASK;
3667
3668        /* ExcessiverBufferOverrunInfo */
3669        if (error_info_select & ES_EXCESSIVE_BUFFER_OVERRUN_INFO)
3670                /*
3671                 * status bit is essentially kept in the h/w - bit 5 of
3672                 * RCV_ERR_INFO
3673                 */
3674                write_csr(dd, RCV_ERR_INFO,
3675                          RCV_ERR_INFO_RCV_EXCESS_BUFFER_OVERRUN_SMASK);
3676
3677        if (error_info_select & ES_PORT_XMIT_CONSTRAINT_ERROR_INFO)
3678                dd->err_info_xmit_constraint.status &= ~OPA_EI_STATUS_SMASK;
3679
3680        if (error_info_select & ES_PORT_RCV_CONSTRAINT_ERROR_INFO)
3681                dd->err_info_rcv_constraint.status &= ~OPA_EI_STATUS_SMASK;
3682
3683        /* UncorrectableErrorInfo */
3684        if (error_info_select & ES_UNCORRECTABLE_ERROR_INFO)
3685                /* turn off status bit */
3686                dd->err_info_uncorrectable &= ~OPA_EI_STATUS_SMASK;
3687
3688        /* FMConfigErrorInfo */
3689        if (error_info_select & ES_FM_CONFIG_ERROR_INFO)
3690                /* turn off status bit */
3691                dd->err_info_fmconfig &= ~OPA_EI_STATUS_SMASK;
3692
3693        if (resp_len)
3694                *resp_len += sizeof(*req);
3695
3696        return reply((struct ib_mad_hdr *)pmp);
3697}
3698
3699struct opa_congestion_info_attr {
3700        __be16 congestion_info;
3701        u8 control_table_cap;   /* Multiple of 64 entry unit CCTs */
3702        u8 congestion_log_length;
3703} __packed;
3704
3705static int __subn_get_opa_cong_info(struct opa_smp *smp, u32 am, u8 *data,
3706                                    struct ib_device *ibdev, u8 port,
3707                                    u32 *resp_len, u32 max_len)
3708{
3709        struct opa_congestion_info_attr *p =
3710                (struct opa_congestion_info_attr *)data;
3711        struct hfi1_ibport *ibp = to_iport(ibdev, port);
3712        struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
3713
3714        if (smp_length_check(sizeof(*p), max_len)) {
3715                smp->status |= IB_SMP_INVALID_FIELD;
3716                return reply((struct ib_mad_hdr *)smp);
3717        }
3718
3719        p->congestion_info = 0;
3720        p->control_table_cap = ppd->cc_max_table_entries;
3721        p->congestion_log_length = OPA_CONG_LOG_ELEMS;
3722
3723        if (resp_len)
3724                *resp_len += sizeof(*p);
3725
3726        return reply((struct ib_mad_hdr *)smp);
3727}
3728
3729static int __subn_get_opa_cong_setting(struct opa_smp *smp, u32 am,
3730                                       u8 *data, struct ib_device *ibdev,
3731                                       u8 port, u32 *resp_len, u32 max_len)
3732{
3733        int i;
3734        struct opa_congestion_setting_attr *p =
3735                (struct opa_congestion_setting_attr *)data;
3736        struct hfi1_ibport *ibp = to_iport(ibdev, port);
3737        struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
3738        struct opa_congestion_setting_entry_shadow *entries;
3739        struct cc_state *cc_state;
3740
3741        if (smp_length_check(sizeof(*p), max_len)) {
3742                smp->status |= IB_SMP_INVALID_FIELD;
3743                return reply((struct ib_mad_hdr *)smp);
3744        }
3745
3746        rcu_read_lock();
3747
3748        cc_state = get_cc_state(ppd);
3749
3750        if (!cc_state) {
3751                rcu_read_unlock();
3752                return reply((struct ib_mad_hdr *)smp);
3753        }
3754
3755        entries = cc_state->cong_setting.entries;
3756        p->port_control = cpu_to_be16(cc_state->cong_setting.port_control);
3757        p->control_map = cpu_to_be32(cc_state->cong_setting.control_map);
3758        for (i = 0; i < OPA_MAX_SLS; i++) {
3759                p->entries[i].ccti_increase = entries[i].ccti_increase;
3760                p->entries[i].ccti_timer = cpu_to_be16(entries[i].ccti_timer);
3761                p->entries[i].trigger_threshold =
3762                        entries[i].trigger_threshold;
3763                p->entries[i].ccti_min = entries[i].ccti_min;
3764        }
3765
3766        rcu_read_unlock();
3767
3768        if (resp_len)
3769                *resp_len += sizeof(*p);
3770
3771        return reply((struct ib_mad_hdr *)smp);
3772}
3773
3774/*
3775 * Apply congestion control information stored in the ppd to the
3776 * active structure.
3777 */
3778static void apply_cc_state(struct hfi1_pportdata *ppd)
3779{
3780        struct cc_state *old_cc_state, *new_cc_state;
3781
3782        new_cc_state = kzalloc(sizeof(*new_cc_state), GFP_KERNEL);
3783        if (!new_cc_state)
3784                return;
3785
3786        /*
3787         * Hold the lock for updating *and* to prevent ppd information
3788         * from changing during the update.
3789         */
3790        spin_lock(&ppd->cc_state_lock);
3791
3792        old_cc_state = get_cc_state_protected(ppd);
3793        if (!old_cc_state) {
3794                /* never active, or shutting down */
3795                spin_unlock(&ppd->cc_state_lock);
3796                kfree(new_cc_state);
3797                return;
3798        }
3799
3800        *new_cc_state = *old_cc_state;
3801
3802        if (ppd->total_cct_entry)
3803                new_cc_state->cct.ccti_limit = ppd->total_cct_entry - 1;
3804        else
3805                new_cc_state->cct.ccti_limit = 0;
3806
3807        memcpy(new_cc_state->cct.entries, ppd->ccti_entries,
3808               ppd->total_cct_entry * sizeof(struct ib_cc_table_entry));
3809
3810        new_cc_state->cong_setting.port_control = IB_CC_CCS_PC_SL_BASED;
3811        new_cc_state->cong_setting.control_map = ppd->cc_sl_control_map;
3812        memcpy(new_cc_state->cong_setting.entries, ppd->congestion_entries,
3813               OPA_MAX_SLS * sizeof(struct opa_congestion_setting_entry));
3814
3815        rcu_assign_pointer(ppd->cc_state, new_cc_state);
3816
3817        spin_unlock(&ppd->cc_state_lock);
3818
3819        kfree_rcu(old_cc_state, rcu);
3820}
3821
3822static int __subn_set_opa_cong_setting(struct opa_smp *smp, u32 am, u8 *data,
3823                                       struct ib_device *ibdev, u8 port,
3824                                       u32 *resp_len, u32 max_len)
3825{
3826        struct opa_congestion_setting_attr *p =
3827                (struct opa_congestion_setting_attr *)data;
3828        struct hfi1_ibport *ibp = to_iport(ibdev, port);
3829        struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
3830        struct opa_congestion_setting_entry_shadow *entries;
3831        int i;
3832
3833        if (smp_length_check(sizeof(*p), max_len)) {
3834                smp->status |= IB_SMP_INVALID_FIELD;
3835                return reply((struct ib_mad_hdr *)smp);
3836        }
3837
3838        /*
3839         * Save details from packet into the ppd.  Hold the cc_state_lock so
3840         * our information is consistent with anyone trying to apply the state.
3841         */
3842        spin_lock(&ppd->cc_state_lock);
3843        ppd->cc_sl_control_map = be32_to_cpu(p->control_map);
3844
3845        entries = ppd->congestion_entries;
3846        for (i = 0; i < OPA_MAX_SLS; i++) {
3847                entries[i].ccti_increase = p->entries[i].ccti_increase;
3848                entries[i].ccti_timer = be16_to_cpu(p->entries[i].ccti_timer);
3849                entries[i].trigger_threshold =
3850                        p->entries[i].trigger_threshold;
3851                entries[i].ccti_min = p->entries[i].ccti_min;
3852        }
3853        spin_unlock(&ppd->cc_state_lock);
3854
3855        /* now apply the information */
3856        apply_cc_state(ppd);
3857
3858        return __subn_get_opa_cong_setting(smp, am, data, ibdev, port,
3859                                           resp_len, max_len);
3860}
3861
3862static int __subn_get_opa_hfi1_cong_log(struct opa_smp *smp, u32 am,
3863                                        u8 *data, struct ib_device *ibdev,
3864                                        u8 port, u32 *resp_len, u32 max_len)
3865{
3866        struct hfi1_ibport *ibp = to_iport(ibdev, port);
3867        struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
3868        struct opa_hfi1_cong_log *cong_log = (struct opa_hfi1_cong_log *)data;
3869        u64 ts;
3870        int i;
3871
3872        if (am || smp_length_check(sizeof(*cong_log), max_len)) {
3873                smp->status |= IB_SMP_INVALID_FIELD;
3874                return reply((struct ib_mad_hdr *)smp);
3875        }
3876
3877        spin_lock_irq(&ppd->cc_log_lock);
3878
3879        cong_log->log_type = OPA_CC_LOG_TYPE_HFI;
3880        cong_log->congestion_flags = 0;
3881        cong_log->threshold_event_counter =
3882                cpu_to_be16(ppd->threshold_event_counter);
3883        memcpy(cong_log->threshold_cong_event_map,
3884               ppd->threshold_cong_event_map,
3885               sizeof(cong_log->threshold_cong_event_map));
3886        /* keep timestamp in units of 1.024 usec */
3887        ts = ktime_get_ns() / 1024;
3888        cong_log->current_time_stamp = cpu_to_be32(ts);
3889        for (i = 0; i < OPA_CONG_LOG_ELEMS; i++) {
3890                struct opa_hfi1_cong_log_event_internal *cce =
3891                        &ppd->cc_events[ppd->cc_mad_idx++];
3892                if (ppd->cc_mad_idx == OPA_CONG_LOG_ELEMS)
3893                        ppd->cc_mad_idx = 0;
3894                /*
3895                 * Entries which are older than twice the time
3896                 * required to wrap the counter are supposed to
3897                 * be zeroed (CA10-49 IBTA, release 1.2.1, V1).
3898                 */
3899                if ((ts - cce->timestamp) / 2 > U32_MAX)
3900                        continue;
3901                memcpy(cong_log->events[i].local_qp_cn_entry, &cce->lqpn, 3);
3902                memcpy(cong_log->events[i].remote_qp_number_cn_entry,
3903                       &cce->rqpn, 3);
3904                cong_log->events[i].sl_svc_type_cn_entry =
3905                        ((cce->sl & 0x1f) << 3) | (cce->svc_type & 0x7);
3906                cong_log->events[i].remote_lid_cn_entry =
3907                        cpu_to_be32(cce->rlid);
3908                cong_log->events[i].timestamp_cn_entry =
3909                        cpu_to_be32(cce->timestamp);
3910        }
3911
3912        /*
3913         * Reset threshold_cong_event_map, and threshold_event_counter
3914         * to 0 when log is read.
3915         */
3916        memset(ppd->threshold_cong_event_map, 0x0,
3917               sizeof(ppd->threshold_cong_event_map));
3918        ppd->threshold_event_counter = 0;
3919
3920        spin_unlock_irq(&ppd->cc_log_lock);
3921
3922        if (resp_len)
3923                *resp_len += sizeof(struct opa_hfi1_cong_log);
3924
3925        return reply((struct ib_mad_hdr *)smp);
3926}
3927
3928static int __subn_get_opa_cc_table(struct opa_smp *smp, u32 am, u8 *data,
3929                                   struct ib_device *ibdev, u8 port,
3930                                   u32 *resp_len, u32 max_len)
3931{
3932        struct ib_cc_table_attr *cc_table_attr =
3933                (struct ib_cc_table_attr *)data;
3934        struct hfi1_ibport *ibp = to_iport(ibdev, port);
3935        struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
3936        u32 start_block = OPA_AM_START_BLK(am);
3937        u32 n_blocks = OPA_AM_NBLK(am);
3938        struct ib_cc_table_entry_shadow *entries;
3939        int i, j;
3940        u32 sentry, eentry;
3941        struct cc_state *cc_state;
3942        u32 size = sizeof(u16) * (IB_CCT_ENTRIES * n_blocks + 1);
3943
3944        /* sanity check n_blocks, start_block */
3945        if (n_blocks == 0 || smp_length_check(size, max_len) ||
3946            start_block + n_blocks > ppd->cc_max_table_entries) {
3947                smp->status |= IB_SMP_INVALID_FIELD;
3948                return reply((struct ib_mad_hdr *)smp);
3949        }
3950
3951        rcu_read_lock();
3952
3953        cc_state = get_cc_state(ppd);
3954
3955        if (!cc_state) {
3956                rcu_read_unlock();
3957                return reply((struct ib_mad_hdr *)smp);
3958        }
3959
3960        sentry = start_block * IB_CCT_ENTRIES;
3961        eentry = sentry + (IB_CCT_ENTRIES * n_blocks);
3962
3963        cc_table_attr->ccti_limit = cpu_to_be16(cc_state->cct.ccti_limit);
3964
3965        entries = cc_state->cct.entries;
3966
3967        /* return n_blocks, though the last block may not be full */
3968        for (j = 0, i = sentry; i < eentry; j++, i++)
3969                cc_table_attr->ccti_entries[j].entry =
3970                        cpu_to_be16(entries[i].entry);
3971
3972        rcu_read_unlock();
3973
3974        if (resp_len)
3975                *resp_len += size;
3976
3977        return reply((struct ib_mad_hdr *)smp);
3978}
3979
3980static int __subn_set_opa_cc_table(struct opa_smp *smp, u32 am, u8 *data,
3981                                   struct ib_device *ibdev, u8 port,
3982                                   u32 *resp_len, u32 max_len)
3983{
3984        struct ib_cc_table_attr *p = (struct ib_cc_table_attr *)data;
3985        struct hfi1_ibport *ibp = to_iport(ibdev, port);
3986        struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
3987        u32 start_block = OPA_AM_START_BLK(am);
3988        u32 n_blocks = OPA_AM_NBLK(am);
3989        struct ib_cc_table_entry_shadow *entries;
3990        int i, j;
3991        u32 sentry, eentry;
3992        u16 ccti_limit;
3993        u32 size = sizeof(u16) * (IB_CCT_ENTRIES * n_blocks + 1);
3994
3995        /* sanity check n_blocks, start_block */
3996        if (n_blocks == 0 || smp_length_check(size, max_len) ||
3997            start_block + n_blocks > ppd->cc_max_table_entries) {
3998                smp->status |= IB_SMP_INVALID_FIELD;
3999                return reply((struct ib_mad_hdr *)smp);
4000        }
4001
4002        sentry = start_block * IB_CCT_ENTRIES;
4003        eentry = sentry + ((n_blocks - 1) * IB_CCT_ENTRIES) +
4004                 (be16_to_cpu(p->ccti_limit)) % IB_CCT_ENTRIES + 1;
4005
4006        /* sanity check ccti_limit */
4007        ccti_limit = be16_to_cpu(p->ccti_limit);
4008        if (ccti_limit + 1 > eentry) {
4009                smp->status |= IB_SMP_INVALID_FIELD;
4010                return reply((struct ib_mad_hdr *)smp);
4011        }
4012
4013        /*
4014         * Save details from packet into the ppd.  Hold the cc_state_lock so
4015         * our information is consistent with anyone trying to apply the state.
4016         */
4017        spin_lock(&ppd->cc_state_lock);
4018        ppd->total_cct_entry = ccti_limit + 1;
4019        entries = ppd->ccti_entries;
4020        for (j = 0, i = sentry; i < eentry; j++, i++)
4021                entries[i].entry = be16_to_cpu(p->ccti_entries[j].entry);
4022        spin_unlock(&ppd->cc_state_lock);
4023
4024        /* now apply the information */
4025        apply_cc_state(ppd);
4026
4027        return __subn_get_opa_cc_table(smp, am, data, ibdev, port, resp_len,
4028                                       max_len);
4029}
4030
4031struct opa_led_info {
4032        __be32 rsvd_led_mask;
4033        __be32 rsvd;
4034};
4035
4036#define OPA_LED_SHIFT   31
4037#define OPA_LED_MASK    BIT(OPA_LED_SHIFT)
4038
4039static int __subn_get_opa_led_info(struct opa_smp *smp, u32 am, u8 *data,
4040                                   struct ib_device *ibdev, u8 port,
4041                                   u32 *resp_len, u32 max_len)
4042{
4043        struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
4044        struct hfi1_pportdata *ppd = dd->pport;
4045        struct opa_led_info *p = (struct opa_led_info *)data;
4046        u32 nport = OPA_AM_NPORT(am);
4047        u32 is_beaconing_active;
4048
4049        if (nport != 1 || smp_length_check(sizeof(*p), max_len)) {
4050                smp->status |= IB_SMP_INVALID_FIELD;
4051                return reply((struct ib_mad_hdr *)smp);
4052        }
4053
4054        /*
4055         * This pairs with the memory barrier in hfi1_start_led_override to
4056         * ensure that we read the correct state of LED beaconing represented
4057         * by led_override_timer_active
4058         */
4059        smp_rmb();
4060        is_beaconing_active = !!atomic_read(&ppd->led_override_timer_active);
4061        p->rsvd_led_mask = cpu_to_be32(is_beaconing_active << OPA_LED_SHIFT);
4062
4063        if (resp_len)
4064                *resp_len += sizeof(struct opa_led_info);
4065
4066        return reply((struct ib_mad_hdr *)smp);
4067}
4068
4069static int __subn_set_opa_led_info(struct opa_smp *smp, u32 am, u8 *data,
4070                                   struct ib_device *ibdev, u8 port,
4071                                   u32 *resp_len, u32 max_len)
4072{
4073        struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
4074        struct opa_led_info *p = (struct opa_led_info *)data;
4075        u32 nport = OPA_AM_NPORT(am);
4076        int on = !!(be32_to_cpu(p->rsvd_led_mask) & OPA_LED_MASK);
4077
4078        if (nport != 1 || smp_length_check(sizeof(*p), max_len)) {
4079                smp->status |= IB_SMP_INVALID_FIELD;
4080                return reply((struct ib_mad_hdr *)smp);
4081        }
4082
4083        if (on)
4084                hfi1_start_led_override(dd->pport, 2000, 1500);
4085        else
4086                shutdown_led_override(dd->pport);
4087
4088        return __subn_get_opa_led_info(smp, am, data, ibdev, port, resp_len,
4089                                       max_len);
4090}
4091
4092static int subn_get_opa_sma(__be16 attr_id, struct opa_smp *smp, u32 am,
4093                            u8 *data, struct ib_device *ibdev, u8 port,
4094                            u32 *resp_len, u32 max_len)
4095{
4096        int ret;
4097        struct hfi1_ibport *ibp = to_iport(ibdev, port);
4098
4099        switch (attr_id) {
4100        case IB_SMP_ATTR_NODE_DESC:
4101                ret = __subn_get_opa_nodedesc(smp, am, data, ibdev, port,
4102                                              resp_len, max_len);
4103                break;
4104        case IB_SMP_ATTR_NODE_INFO:
4105                ret = __subn_get_opa_nodeinfo(smp, am, data, ibdev, port,
4106                                              resp_len, max_len);
4107                break;
4108        case IB_SMP_ATTR_PORT_INFO:
4109                ret = __subn_get_opa_portinfo(smp, am, data, ibdev, port,
4110                                              resp_len, max_len);
4111                break;
4112        case IB_SMP_ATTR_PKEY_TABLE:
4113                ret = __subn_get_opa_pkeytable(smp, am, data, ibdev, port,
4114                                               resp_len, max_len);
4115                break;
4116        case OPA_ATTRIB_ID_SL_TO_SC_MAP:
4117                ret = __subn_get_opa_sl_to_sc(smp, am, data, ibdev, port,
4118                                              resp_len, max_len);
4119                break;
4120        case OPA_ATTRIB_ID_SC_TO_SL_MAP:
4121                ret = __subn_get_opa_sc_to_sl(smp, am, data, ibdev, port,
4122                                              resp_len, max_len);
4123                break;
4124        case OPA_ATTRIB_ID_SC_TO_VLT_MAP:
4125                ret = __subn_get_opa_sc_to_vlt(smp, am, data, ibdev, port,
4126                                               resp_len, max_len);
4127                break;
4128        case OPA_ATTRIB_ID_SC_TO_VLNT_MAP:
4129                ret = __subn_get_opa_sc_to_vlnt(smp, am, data, ibdev, port,
4130                                                resp_len, max_len);
4131                break;
4132        case OPA_ATTRIB_ID_PORT_STATE_INFO:
4133                ret = __subn_get_opa_psi(smp, am, data, ibdev, port,
4134                                         resp_len, max_len);
4135                break;
4136        case OPA_ATTRIB_ID_BUFFER_CONTROL_TABLE:
4137                ret = __subn_get_opa_bct(smp, am, data, ibdev, port,
4138                                         resp_len, max_len);
4139                break;
4140        case OPA_ATTRIB_ID_CABLE_INFO:
4141                ret = __subn_get_opa_cable_info(smp, am, data, ibdev, port,
4142                                                resp_len, max_len);
4143                break;
4144        case IB_SMP_ATTR_VL_ARB_TABLE:
4145                ret = __subn_get_opa_vl_arb(smp, am, data, ibdev, port,
4146                                            resp_len, max_len);
4147                break;
4148        case OPA_ATTRIB_ID_CONGESTION_INFO:
4149                ret = __subn_get_opa_cong_info(smp, am, data, ibdev, port,
4150                                               resp_len, max_len);
4151                break;
4152        case OPA_ATTRIB_ID_HFI_CONGESTION_SETTING:
4153                ret = __subn_get_opa_cong_setting(smp, am, data, ibdev,
4154                                                  port, resp_len, max_len);
4155                break;
4156        case OPA_ATTRIB_ID_HFI_CONGESTION_LOG:
4157                ret = __subn_get_opa_hfi1_cong_log(smp, am, data, ibdev,
4158                                                   port, resp_len, max_len);
4159                break;
4160        case OPA_ATTRIB_ID_CONGESTION_CONTROL_TABLE:
4161                ret = __subn_get_opa_cc_table(smp, am, data, ibdev, port,
4162                                              resp_len, max_len);
4163                break;
4164        case IB_SMP_ATTR_LED_INFO:
4165                ret = __subn_get_opa_led_info(smp, am, data, ibdev, port,
4166                                              resp_len, max_len);
4167                break;
4168        case IB_SMP_ATTR_SM_INFO:
4169                if (ibp->rvp.port_cap_flags & IB_PORT_SM_DISABLED)
4170                        return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
4171                if (ibp->rvp.port_cap_flags & IB_PORT_SM)
4172                        return IB_MAD_RESULT_SUCCESS;
4173                /* FALLTHROUGH */
4174        default:
4175                smp->status |= IB_SMP_UNSUP_METH_ATTR;
4176                ret = reply((struct ib_mad_hdr *)smp);
4177                break;
4178        }
4179        return ret;
4180}
4181
4182static int subn_set_opa_sma(__be16 attr_id, struct opa_smp *smp, u32 am,
4183                            u8 *data, struct ib_device *ibdev, u8 port,
4184                            u32 *resp_len, u32 max_len, int local_mad)
4185{
4186        int ret;
4187        struct hfi1_ibport *ibp = to_iport(ibdev, port);
4188
4189        switch (attr_id) {
4190        case IB_SMP_ATTR_PORT_INFO:
4191                ret = __subn_set_opa_portinfo(smp, am, data, ibdev, port,
4192                                              resp_len, max_len, local_mad);
4193                break;
4194        case IB_SMP_ATTR_PKEY_TABLE:
4195                ret = __subn_set_opa_pkeytable(smp, am, data, ibdev, port,
4196                                               resp_len, max_len);
4197                break;
4198        case OPA_ATTRIB_ID_SL_TO_SC_MAP:
4199                ret = __subn_set_opa_sl_to_sc(smp, am, data, ibdev, port,
4200                                              resp_len, max_len);
4201                break;
4202        case OPA_ATTRIB_ID_SC_TO_SL_MAP:
4203                ret = __subn_set_opa_sc_to_sl(smp, am, data, ibdev, port,
4204                                              resp_len, max_len);
4205                break;
4206        case OPA_ATTRIB_ID_SC_TO_VLT_MAP:
4207                ret = __subn_set_opa_sc_to_vlt(smp, am, data, ibdev, port,
4208                                               resp_len, max_len);
4209                break;
4210        case OPA_ATTRIB_ID_SC_TO_VLNT_MAP:
4211                ret = __subn_set_opa_sc_to_vlnt(smp, am, data, ibdev, port,
4212                                                resp_len, max_len);
4213                break;
4214        case OPA_ATTRIB_ID_PORT_STATE_INFO:
4215                ret = __subn_set_opa_psi(smp, am, data, ibdev, port,
4216                                         resp_len, max_len, local_mad);
4217                break;
4218        case OPA_ATTRIB_ID_BUFFER_CONTROL_TABLE:
4219                ret = __subn_set_opa_bct(smp, am, data, ibdev, port,
4220                                         resp_len, max_len);
4221                break;
4222        case IB_SMP_ATTR_VL_ARB_TABLE:
4223                ret = __subn_set_opa_vl_arb(smp, am, data, ibdev, port,
4224                                            resp_len, max_len);
4225                break;
4226        case OPA_ATTRIB_ID_HFI_CONGESTION_SETTING:
4227                ret = __subn_set_opa_cong_setting(smp, am, data, ibdev,
4228                                                  port, resp_len, max_len);
4229                break;
4230        case OPA_ATTRIB_ID_CONGESTION_CONTROL_TABLE:
4231                ret = __subn_set_opa_cc_table(smp, am, data, ibdev, port,
4232                                              resp_len, max_len);
4233                break;
4234        case IB_SMP_ATTR_LED_INFO:
4235                ret = __subn_set_opa_led_info(smp, am, data, ibdev, port,
4236                                              resp_len, max_len);
4237                break;
4238        case IB_SMP_ATTR_SM_INFO:
4239                if (ibp->rvp.port_cap_flags & IB_PORT_SM_DISABLED)
4240                        return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
4241                if (ibp->rvp.port_cap_flags & IB_PORT_SM)
4242                        return IB_MAD_RESULT_SUCCESS;
4243                /* FALLTHROUGH */
4244        default:
4245                smp->status |= IB_SMP_UNSUP_METH_ATTR;
4246                ret = reply((struct ib_mad_hdr *)smp);
4247                break;
4248        }
4249        return ret;
4250}
4251
4252static inline void set_aggr_error(struct opa_aggregate *ag)
4253{
4254        ag->err_reqlength |= cpu_to_be16(0x8000);
4255}
4256
4257static int subn_get_opa_aggregate(struct opa_smp *smp,
4258                                  struct ib_device *ibdev, u8 port,
4259                                  u32 *resp_len)
4260{
4261        int i;
4262        u32 num_attr = be32_to_cpu(smp->attr_mod) & 0x000000ff;
4263        u8 *next_smp = opa_get_smp_data(smp);
4264
4265        if (num_attr < 1 || num_attr > 117) {
4266                smp->status |= IB_SMP_INVALID_FIELD;
4267                return reply((struct ib_mad_hdr *)smp);
4268        }
4269
4270        for (i = 0; i < num_attr; i++) {
4271                struct opa_aggregate *agg;
4272                size_t agg_data_len;
4273                size_t agg_size;
4274                u32 am;
4275
4276                agg = (struct opa_aggregate *)next_smp;
4277                agg_data_len = (be16_to_cpu(agg->err_reqlength) & 0x007f) * 8;
4278                agg_size = sizeof(*agg) + agg_data_len;
4279                am = be32_to_cpu(agg->attr_mod);
4280
4281                *resp_len += agg_size;
4282
4283                if (next_smp + agg_size > ((u8 *)smp) + sizeof(*smp)) {
4284                        smp->status |= IB_SMP_INVALID_FIELD;
4285                        return reply((struct ib_mad_hdr *)smp);
4286                }
4287
4288                /* zero the payload for this segment */
4289                memset(next_smp + sizeof(*agg), 0, agg_data_len);
4290
4291                (void)subn_get_opa_sma(agg->attr_id, smp, am, agg->data,
4292                                       ibdev, port, NULL, (u32)agg_data_len);
4293
4294                if (smp->status & IB_SMP_INVALID_FIELD)
4295                        break;
4296                if (smp->status & ~IB_SMP_DIRECTION) {
4297                        set_aggr_error(agg);
4298                        return reply((struct ib_mad_hdr *)smp);
4299                }
4300                next_smp += agg_size;
4301        }
4302
4303        return reply((struct ib_mad_hdr *)smp);
4304}
4305
4306static int subn_set_opa_aggregate(struct opa_smp *smp,
4307                                  struct ib_device *ibdev, u8 port,
4308                                  u32 *resp_len, int local_mad)
4309{
4310        int i;
4311        u32 num_attr = be32_to_cpu(smp->attr_mod) & 0x000000ff;
4312        u8 *next_smp = opa_get_smp_data(smp);
4313
4314        if (num_attr < 1 || num_attr > 117) {
4315                smp->status |= IB_SMP_INVALID_FIELD;
4316                return reply((struct ib_mad_hdr *)smp);
4317        }
4318
4319        for (i = 0; i < num_attr; i++) {
4320                struct opa_aggregate *agg;
4321                size_t agg_data_len;
4322                size_t agg_size;
4323                u32 am;
4324
4325                agg = (struct opa_aggregate *)next_smp;
4326                agg_data_len = (be16_to_cpu(agg->err_reqlength) & 0x007f) * 8;
4327                agg_size = sizeof(*agg) + agg_data_len;
4328                am = be32_to_cpu(agg->attr_mod);
4329
4330                *resp_len += agg_size;
4331
4332                if (next_smp + agg_size > ((u8 *)smp) + sizeof(*smp)) {
4333                        smp->status |= IB_SMP_INVALID_FIELD;
4334                        return reply((struct ib_mad_hdr *)smp);
4335                }
4336
4337                (void)subn_set_opa_sma(agg->attr_id, smp, am, agg->data,
4338                                       ibdev, port, NULL, (u32)agg_data_len,
4339                                       local_mad);
4340
4341                if (smp->status & IB_SMP_INVALID_FIELD)
4342                        break;
4343                if (smp->status & ~IB_SMP_DIRECTION) {
4344                        set_aggr_error(agg);
4345                        return reply((struct ib_mad_hdr *)smp);
4346                }
4347                next_smp += agg_size;
4348        }
4349
4350        return reply((struct ib_mad_hdr *)smp);
4351}
4352
4353/*
4354 * OPAv1 specifies that, on the transition to link up, these counters
4355 * are cleared:
4356 *   PortRcvErrors [*]
4357 *   LinkErrorRecovery
4358 *   LocalLinkIntegrityErrors
4359 *   ExcessiveBufferOverruns [*]
4360 *
4361 * [*] Error info associated with these counters is retained, but the
4362 * error info status is reset to 0.
4363 */
4364void clear_linkup_counters(struct hfi1_devdata *dd)
4365{
4366        /* PortRcvErrors */
4367        write_dev_cntr(dd, C_DC_RCV_ERR, CNTR_INVALID_VL, 0);
4368        dd->err_info_rcvport.status_and_code &= ~OPA_EI_STATUS_SMASK;
4369        /* LinkErrorRecovery */
4370        write_dev_cntr(dd, C_DC_SEQ_CRC_CNT, CNTR_INVALID_VL, 0);
4371        write_dev_cntr(dd, C_DC_REINIT_FROM_PEER_CNT, CNTR_INVALID_VL, 0);
4372        /* LocalLinkIntegrityErrors */
4373        write_dev_cntr(dd, C_DC_RX_REPLAY, CNTR_INVALID_VL, 0);
4374        /* ExcessiveBufferOverruns */
4375        write_dev_cntr(dd, C_RCV_OVF, CNTR_INVALID_VL, 0);
4376        dd->rcv_ovfl_cnt = 0;
4377        dd->err_info_xmit_constraint.status &= ~OPA_EI_STATUS_SMASK;
4378}
4379
4380static int is_full_mgmt_pkey_in_table(struct hfi1_ibport *ibp)
4381{
4382        unsigned int i;
4383        struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
4384
4385        for (i = 0; i < ARRAY_SIZE(ppd->pkeys); ++i)
4386                if (ppd->pkeys[i] == FULL_MGMT_P_KEY)
4387                        return 1;
4388
4389        return 0;
4390}
4391
4392/*
4393 * is_local_mad() returns 1 if 'mad' is sent from, and destined to the
4394 * local node, 0 otherwise.
4395 */
4396static int is_local_mad(struct hfi1_ibport *ibp, const struct opa_mad *mad,
4397                        const struct ib_wc *in_wc)
4398{
4399        struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
4400        const struct opa_smp *smp = (const struct opa_smp *)mad;
4401
4402        if (smp->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
4403                return (smp->hop_cnt == 0 &&
4404                        smp->route.dr.dr_slid == OPA_LID_PERMISSIVE &&
4405                        smp->route.dr.dr_dlid == OPA_LID_PERMISSIVE);
4406        }
4407
4408        return (in_wc->slid == ppd->lid);
4409}
4410
4411/*
4412 * opa_local_smp_check() should only be called on MADs for which
4413 * is_local_mad() returns true. It applies the SMP checks that are
4414 * specific to SMPs which are sent from, and destined to this node.
4415 * opa_local_smp_check() returns 0 if the SMP passes its checks, 1
4416 * otherwise.
4417 *
4418 * SMPs which arrive from other nodes are instead checked by
4419 * opa_smp_check().
4420 */
4421static int opa_local_smp_check(struct hfi1_ibport *ibp,
4422                               const struct ib_wc *in_wc)
4423{
4424        struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
4425        u16 pkey;
4426
4427        if (in_wc->pkey_index >= ARRAY_SIZE(ppd->pkeys))
4428                return 1;
4429
4430        pkey = ppd->pkeys[in_wc->pkey_index];
4431        /*
4432         * We need to do the "node-local" checks specified in OPAv1,
4433         * rev 0.90, section 9.10.26, which are:
4434         *   - pkey is 0x7fff, or 0xffff
4435         *   - Source QPN == 0 || Destination QPN == 0
4436         *   - the MAD header's management class is either
4437         *     IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE or
4438         *     IB_MGMT_CLASS_SUBN_LID_ROUTED
4439         *   - SLID != 0
4440         *
4441         * However, we know (and so don't need to check again) that,
4442         * for local SMPs, the MAD stack passes MADs with:
4443         *   - Source QPN of 0
4444         *   - MAD mgmt_class is IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
4445         *   - SLID is either: OPA_LID_PERMISSIVE (0xFFFFFFFF), or
4446         *     our own port's lid
4447         *
4448         */
4449        if (pkey == LIM_MGMT_P_KEY || pkey == FULL_MGMT_P_KEY)
4450                return 0;
4451        ingress_pkey_table_fail(ppd, pkey, in_wc->slid);
4452        return 1;
4453}
4454
4455/**
4456 * hfi1_pkey_validation_pma - It validates PKEYs for incoming PMA MAD packets.
4457 * @ibp: IB port data
4458 * @in_mad: MAD packet with header and data
4459 * @in_wc: Work completion data such as source LID, port number, etc.
4460 *
4461 * These are all the possible logic rules for validating a pkey:
4462 *
4463 * a) If pkey neither FULL_MGMT_P_KEY nor LIM_MGMT_P_KEY,
4464 *    and NOT self-originated packet:
4465 *     Drop MAD packet as it should always be part of the
4466 *     management partition unless it's a self-originated packet.
4467 *
4468 * b) If pkey_index -> FULL_MGMT_P_KEY, and LIM_MGMT_P_KEY in pkey table:
4469 *     The packet is coming from a management node and the receiving node
4470 *     is also a management node, so it is safe for the packet to go through.
4471 *
4472 * c) If pkey_index -> FULL_MGMT_P_KEY, and LIM_MGMT_P_KEY is NOT in pkey table:
4473 *     Drop the packet as LIM_MGMT_P_KEY should always be in the pkey table.
4474 *     It could be an FM misconfiguration.
4475 *
4476 * d) If pkey_index -> LIM_MGMT_P_KEY and FULL_MGMT_P_KEY is NOT in pkey table:
4477 *     It is safe for the packet to go through since a non-management node is
4478 *     talking to another non-management node.
4479 *
4480 * e) If pkey_index -> LIM_MGMT_P_KEY and FULL_MGMT_P_KEY in pkey table:
4481 *     Drop the packet because a non-management node is talking to a
4482 *     management node, and it could be an attack.
4483 *
4484 * For the implementation, these rules can be simplied to only checking
4485 * for (a) and (e). There's no need to check for rule (b) as
4486 * the packet doesn't need to be dropped. Rule (c) is not possible in
4487 * the driver as LIM_MGMT_P_KEY is always in the pkey table.
4488 *
4489 * Return:
4490 * 0 - pkey is okay, -EINVAL it's a bad pkey
4491 */
4492static int hfi1_pkey_validation_pma(struct hfi1_ibport *ibp,
4493                                    const struct opa_mad *in_mad,
4494                                    const struct ib_wc *in_wc)
4495{
4496        u16 pkey_value = hfi1_lookup_pkey_value(ibp, in_wc->pkey_index);
4497
4498        /* Rule (a) from above */
4499        if (!is_local_mad(ibp, in_mad, in_wc) &&
4500            pkey_value != LIM_MGMT_P_KEY &&
4501            pkey_value != FULL_MGMT_P_KEY)
4502                return -EINVAL;
4503
4504        /* Rule (e) from above */
4505        if (pkey_value == LIM_MGMT_P_KEY &&
4506            is_full_mgmt_pkey_in_table(ibp))
4507                return -EINVAL;
4508
4509        return 0;
4510}
4511
4512static int process_subn_opa(struct ib_device *ibdev, int mad_flags,
4513                            u8 port, const struct opa_mad *in_mad,
4514                            struct opa_mad *out_mad,
4515                            u32 *resp_len, int local_mad)
4516{
4517        struct opa_smp *smp = (struct opa_smp *)out_mad;
4518        struct hfi1_ibport *ibp = to_iport(ibdev, port);
4519        u8 *data;
4520        u32 am, data_size;
4521        __be16 attr_id;
4522        int ret;
4523
4524        *out_mad = *in_mad;
4525        data = opa_get_smp_data(smp);
4526        data_size = (u32)opa_get_smp_data_size(smp);
4527
4528        am = be32_to_cpu(smp->attr_mod);
4529        attr_id = smp->attr_id;
4530        if (smp->class_version != OPA_SM_CLASS_VERSION) {
4531                smp->status |= IB_SMP_UNSUP_VERSION;
4532                ret = reply((struct ib_mad_hdr *)smp);
4533                return ret;
4534        }
4535        ret = check_mkey(ibp, (struct ib_mad_hdr *)smp, mad_flags, smp->mkey,
4536                         smp->route.dr.dr_slid, smp->route.dr.return_path,
4537                         smp->hop_cnt);
4538        if (ret) {
4539                u32 port_num = be32_to_cpu(smp->attr_mod);
4540
4541                /*
4542                 * If this is a get/set portinfo, we already check the
4543                 * M_Key if the MAD is for another port and the M_Key
4544                 * is OK on the receiving port. This check is needed
4545                 * to increment the error counters when the M_Key
4546                 * fails to match on *both* ports.
4547                 */
4548                if (attr_id == IB_SMP_ATTR_PORT_INFO &&
4549                    (smp->method == IB_MGMT_METHOD_GET ||
4550                     smp->method == IB_MGMT_METHOD_SET) &&
4551                    port_num && port_num <= ibdev->phys_port_cnt &&
4552                    port != port_num)
4553                        (void)check_mkey(to_iport(ibdev, port_num),
4554                                          (struct ib_mad_hdr *)smp, 0,
4555                                          smp->mkey, smp->route.dr.dr_slid,
4556                                          smp->route.dr.return_path,
4557                                          smp->hop_cnt);
4558                ret = IB_MAD_RESULT_FAILURE;
4559                return ret;
4560        }
4561
4562        *resp_len = opa_get_smp_header_size(smp);
4563
4564        switch (smp->method) {
4565        case IB_MGMT_METHOD_GET:
4566                switch (attr_id) {
4567                default:
4568                        clear_opa_smp_data(smp);
4569                        ret = subn_get_opa_sma(attr_id, smp, am, data,
4570                                               ibdev, port, resp_len,
4571                                               data_size);
4572                        break;
4573                case OPA_ATTRIB_ID_AGGREGATE:
4574                        ret = subn_get_opa_aggregate(smp, ibdev, port,
4575                                                     resp_len);
4576                        break;
4577                }
4578                break;
4579        case IB_MGMT_METHOD_SET:
4580                switch (attr_id) {
4581                default:
4582                        ret = subn_set_opa_sma(attr_id, smp, am, data,
4583                                               ibdev, port, resp_len,
4584                                               data_size, local_mad);
4585                        break;
4586                case OPA_ATTRIB_ID_AGGREGATE:
4587                        ret = subn_set_opa_aggregate(smp, ibdev, port,
4588                                                     resp_len, local_mad);
4589                        break;
4590                }
4591                break;
4592        case IB_MGMT_METHOD_TRAP:
4593        case IB_MGMT_METHOD_REPORT:
4594        case IB_MGMT_METHOD_REPORT_RESP:
4595        case IB_MGMT_METHOD_GET_RESP:
4596                /*
4597                 * The ib_mad module will call us to process responses
4598                 * before checking for other consumers.
4599                 * Just tell the caller to process it normally.
4600                 */
4601                ret = IB_MAD_RESULT_SUCCESS;
4602                break;
4603        case IB_MGMT_METHOD_TRAP_REPRESS:
4604                subn_handle_opa_trap_repress(ibp, smp);
4605                /* Always successful */
4606                ret = IB_MAD_RESULT_SUCCESS;
4607                break;
4608        default:
4609                smp->status |= IB_SMP_UNSUP_METHOD;
4610                ret = reply((struct ib_mad_hdr *)smp);
4611                break;
4612        }
4613
4614        return ret;
4615}
4616
4617static int process_subn(struct ib_device *ibdev, int mad_flags,
4618                        u8 port, const struct ib_mad *in_mad,
4619                        struct ib_mad *out_mad)
4620{
4621        struct ib_smp *smp = (struct ib_smp *)out_mad;
4622        struct hfi1_ibport *ibp = to_iport(ibdev, port);
4623        int ret;
4624
4625        *out_mad = *in_mad;
4626        if (smp->class_version != 1) {
4627                smp->status |= IB_SMP_UNSUP_VERSION;
4628                ret = reply((struct ib_mad_hdr *)smp);
4629                return ret;
4630        }
4631
4632        ret = check_mkey(ibp, (struct ib_mad_hdr *)smp, mad_flags,
4633                         smp->mkey, (__force __be32)smp->dr_slid,
4634                         smp->return_path, smp->hop_cnt);
4635        if (ret) {
4636                u32 port_num = be32_to_cpu(smp->attr_mod);
4637
4638                /*
4639                 * If this is a get/set portinfo, we already check the
4640                 * M_Key if the MAD is for another port and the M_Key
4641                 * is OK on the receiving port. This check is needed
4642                 * to increment the error counters when the M_Key
4643                 * fails to match on *both* ports.
4644                 */
4645                if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO &&
4646                    (smp->method == IB_MGMT_METHOD_GET ||
4647                     smp->method == IB_MGMT_METHOD_SET) &&
4648                    port_num && port_num <= ibdev->phys_port_cnt &&
4649                    port != port_num)
4650                        (void)check_mkey(to_iport(ibdev, port_num),
4651                                         (struct ib_mad_hdr *)smp, 0,
4652                                         smp->mkey,
4653                                         (__force __be32)smp->dr_slid,
4654                                         smp->return_path, smp->hop_cnt);
4655                ret = IB_MAD_RESULT_FAILURE;
4656                return ret;
4657        }
4658
4659        switch (smp->method) {
4660        case IB_MGMT_METHOD_GET:
4661                switch (smp->attr_id) {
4662                case IB_SMP_ATTR_NODE_INFO:
4663                        ret = subn_get_nodeinfo(smp, ibdev, port);
4664                        break;
4665                default:
4666                        smp->status |= IB_SMP_UNSUP_METH_ATTR;
4667                        ret = reply((struct ib_mad_hdr *)smp);
4668                        break;
4669                }
4670                break;
4671        }
4672
4673        return ret;
4674}
4675
4676static int process_perf(struct ib_device *ibdev, u8 port,
4677                        const struct ib_mad *in_mad,
4678                        struct ib_mad *out_mad)
4679{
4680        struct ib_pma_mad *pmp = (struct ib_pma_mad *)out_mad;
4681        struct ib_class_port_info *cpi = (struct ib_class_port_info *)
4682                                                &pmp->data;
4683        int ret = IB_MAD_RESULT_FAILURE;
4684
4685        *out_mad = *in_mad;
4686        if (pmp->mad_hdr.class_version != 1) {
4687                pmp->mad_hdr.status |= IB_SMP_UNSUP_VERSION;
4688                ret = reply((struct ib_mad_hdr *)pmp);
4689                return ret;
4690        }
4691
4692        switch (pmp->mad_hdr.method) {
4693        case IB_MGMT_METHOD_GET:
4694                switch (pmp->mad_hdr.attr_id) {
4695                case IB_PMA_PORT_COUNTERS:
4696                        ret = pma_get_ib_portcounters(pmp, ibdev, port);
4697                        break;
4698                case IB_PMA_PORT_COUNTERS_EXT:
4699                        ret = pma_get_ib_portcounters_ext(pmp, ibdev, port);
4700                        break;
4701                case IB_PMA_CLASS_PORT_INFO:
4702                        cpi->capability_mask = IB_PMA_CLASS_CAP_EXT_WIDTH;
4703                        ret = reply((struct ib_mad_hdr *)pmp);
4704                        break;
4705                default:
4706                        pmp->mad_hdr.status |= IB_SMP_UNSUP_METH_ATTR;
4707                        ret = reply((struct ib_mad_hdr *)pmp);
4708                        break;
4709                }
4710                break;
4711
4712        case IB_MGMT_METHOD_SET:
4713                if (pmp->mad_hdr.attr_id) {
4714                        pmp->mad_hdr.status |= IB_SMP_UNSUP_METH_ATTR;
4715                        ret = reply((struct ib_mad_hdr *)pmp);
4716                }
4717                break;
4718
4719        case IB_MGMT_METHOD_TRAP:
4720        case IB_MGMT_METHOD_GET_RESP:
4721                /*
4722                 * The ib_mad module will call us to process responses
4723                 * before checking for other consumers.
4724                 * Just tell the caller to process it normally.
4725                 */
4726                ret = IB_MAD_RESULT_SUCCESS;
4727                break;
4728
4729        default:
4730                pmp->mad_hdr.status |= IB_SMP_UNSUP_METHOD;
4731                ret = reply((struct ib_mad_hdr *)pmp);
4732                break;
4733        }
4734
4735        return ret;
4736}
4737
4738static int process_perf_opa(struct ib_device *ibdev, u8 port,
4739                            const struct opa_mad *in_mad,
4740                            struct opa_mad *out_mad, u32 *resp_len)
4741{
4742        struct opa_pma_mad *pmp = (struct opa_pma_mad *)out_mad;
4743        int ret;
4744
4745        *out_mad = *in_mad;
4746
4747        if (pmp->mad_hdr.class_version != OPA_SM_CLASS_VERSION) {
4748                pmp->mad_hdr.status |= IB_SMP_UNSUP_VERSION;
4749                return reply((struct ib_mad_hdr *)pmp);
4750        }
4751
4752        *resp_len = sizeof(pmp->mad_hdr);
4753
4754        switch (pmp->mad_hdr.method) {
4755        case IB_MGMT_METHOD_GET:
4756                switch (pmp->mad_hdr.attr_id) {
4757                case IB_PMA_CLASS_PORT_INFO:
4758                        ret = pma_get_opa_classportinfo(pmp, ibdev, resp_len);
4759                        break;
4760                case OPA_PM_ATTRIB_ID_PORT_STATUS:
4761                        ret = pma_get_opa_portstatus(pmp, ibdev, port,
4762                                                     resp_len);
4763                        break;
4764                case OPA_PM_ATTRIB_ID_DATA_PORT_COUNTERS:
4765                        ret = pma_get_opa_datacounters(pmp, ibdev, port,
4766                                                       resp_len);
4767                        break;
4768                case OPA_PM_ATTRIB_ID_ERROR_PORT_COUNTERS:
4769                        ret = pma_get_opa_porterrors(pmp, ibdev, port,
4770                                                     resp_len);
4771                        break;
4772                case OPA_PM_ATTRIB_ID_ERROR_INFO:
4773                        ret = pma_get_opa_errorinfo(pmp, ibdev, port,
4774                                                    resp_len);
4775                        break;
4776                default:
4777                        pmp->mad_hdr.status |= IB_SMP_UNSUP_METH_ATTR;
4778                        ret = reply((struct ib_mad_hdr *)pmp);
4779                        break;
4780                }
4781                break;
4782
4783        case IB_MGMT_METHOD_SET:
4784                switch (pmp->mad_hdr.attr_id) {
4785                case OPA_PM_ATTRIB_ID_CLEAR_PORT_STATUS:
4786                        ret = pma_set_opa_portstatus(pmp, ibdev, port,
4787                                                     resp_len);
4788                        break;
4789                case OPA_PM_ATTRIB_ID_ERROR_INFO:
4790                        ret = pma_set_opa_errorinfo(pmp, ibdev, port,
4791                                                    resp_len);
4792                        break;
4793                default:
4794                        pmp->mad_hdr.status |= IB_SMP_UNSUP_METH_ATTR;
4795                        ret = reply((struct ib_mad_hdr *)pmp);
4796                        break;
4797                }
4798                break;
4799
4800        case IB_MGMT_METHOD_TRAP:
4801        case IB_MGMT_METHOD_GET_RESP:
4802                /*
4803                 * The ib_mad module will call us to process responses
4804                 * before checking for other consumers.
4805                 * Just tell the caller to process it normally.
4806                 */
4807                ret = IB_MAD_RESULT_SUCCESS;
4808                break;
4809
4810        default:
4811                pmp->mad_hdr.status |= IB_SMP_UNSUP_METHOD;
4812                ret = reply((struct ib_mad_hdr *)pmp);
4813                break;
4814        }
4815
4816        return ret;
4817}
4818
4819static int hfi1_process_opa_mad(struct ib_device *ibdev, int mad_flags,
4820                                u8 port, const struct ib_wc *in_wc,
4821                                const struct ib_grh *in_grh,
4822                                const struct opa_mad *in_mad,
4823                                struct opa_mad *out_mad, size_t *out_mad_size,
4824                                u16 *out_mad_pkey_index)
4825{
4826        int ret;
4827        int pkey_idx;
4828        int local_mad = 0;
4829        u32 resp_len = in_wc->byte_len - sizeof(*in_grh);
4830        struct hfi1_ibport *ibp = to_iport(ibdev, port);
4831
4832        pkey_idx = hfi1_lookup_pkey_idx(ibp, LIM_MGMT_P_KEY);
4833        if (pkey_idx < 0) {
4834                pr_warn("failed to find limited mgmt pkey, defaulting 0x%x\n",
4835                        hfi1_get_pkey(ibp, 1));
4836                pkey_idx = 1;
4837        }
4838        *out_mad_pkey_index = (u16)pkey_idx;
4839
4840        switch (in_mad->mad_hdr.mgmt_class) {
4841        case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
4842        case IB_MGMT_CLASS_SUBN_LID_ROUTED:
4843                local_mad = is_local_mad(ibp, in_mad, in_wc);
4844                if (local_mad) {
4845                        ret = opa_local_smp_check(ibp, in_wc);
4846                        if (ret)
4847                                return IB_MAD_RESULT_FAILURE;
4848                }
4849                ret = process_subn_opa(ibdev, mad_flags, port, in_mad,
4850                                       out_mad, &resp_len, local_mad);
4851                goto bail;
4852        case IB_MGMT_CLASS_PERF_MGMT:
4853                ret = hfi1_pkey_validation_pma(ibp, in_mad, in_wc);
4854                if (ret)
4855                        return IB_MAD_RESULT_FAILURE;
4856
4857                ret = process_perf_opa(ibdev, port, in_mad, out_mad, &resp_len);
4858                goto bail;
4859
4860        default:
4861                ret = IB_MAD_RESULT_SUCCESS;
4862        }
4863
4864bail:
4865        if (ret & IB_MAD_RESULT_REPLY)
4866                *out_mad_size = round_up(resp_len, 8);
4867        else if (ret & IB_MAD_RESULT_SUCCESS)
4868                *out_mad_size = in_wc->byte_len - sizeof(struct ib_grh);
4869
4870        return ret;
4871}
4872
4873static int hfi1_process_ib_mad(struct ib_device *ibdev, int mad_flags, u8 port,
4874                               const struct ib_wc *in_wc,
4875                               const struct ib_grh *in_grh,
4876                               const struct ib_mad *in_mad,
4877                               struct ib_mad *out_mad)
4878{
4879        int ret;
4880
4881        switch (in_mad->mad_hdr.mgmt_class) {
4882        case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
4883        case IB_MGMT_CLASS_SUBN_LID_ROUTED:
4884                ret = process_subn(ibdev, mad_flags, port, in_mad, out_mad);
4885                break;
4886        case IB_MGMT_CLASS_PERF_MGMT:
4887                ret = process_perf(ibdev, port, in_mad, out_mad);
4888                break;
4889        default:
4890                ret = IB_MAD_RESULT_SUCCESS;
4891                break;
4892        }
4893
4894        return ret;
4895}
4896
4897/**
4898 * hfi1_process_mad - process an incoming MAD packet
4899 * @ibdev: the infiniband device this packet came in on
4900 * @mad_flags: MAD flags
4901 * @port: the port number this packet came in on
4902 * @in_wc: the work completion entry for this packet
4903 * @in_grh: the global route header for this packet
4904 * @in_mad: the incoming MAD
4905 * @out_mad: any outgoing MAD reply
4906 *
4907 * Returns IB_MAD_RESULT_SUCCESS if this is a MAD that we are not
4908 * interested in processing.
4909 *
4910 * Note that the verbs framework has already done the MAD sanity checks,
4911 * and hop count/pointer updating for IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
4912 * MADs.
4913 *
4914 * This is called by the ib_mad module.
4915 */
4916int hfi1_process_mad(struct ib_device *ibdev, int mad_flags, u8 port,
4917                     const struct ib_wc *in_wc, const struct ib_grh *in_grh,
4918                     const struct ib_mad *in_mad, struct ib_mad *out_mad,
4919                     size_t *out_mad_size, u16 *out_mad_pkey_index)
4920{
4921        switch (in_mad->mad_hdr.base_version) {
4922        case OPA_MGMT_BASE_VERSION:
4923                return hfi1_process_opa_mad(ibdev, mad_flags, port,
4924                                            in_wc, in_grh,
4925                                            (struct opa_mad *)in_mad,
4926                                            (struct opa_mad *)out_mad,
4927                                            out_mad_size,
4928                                            out_mad_pkey_index);
4929        case IB_MGMT_BASE_VERSION:
4930                return hfi1_process_ib_mad(ibdev, mad_flags, port, in_wc,
4931                                           in_grh, in_mad, out_mad);
4932        default:
4933                break;
4934        }
4935
4936        return IB_MAD_RESULT_FAILURE;
4937}
4938