drivers/infiniband/hw/hns/hns_roce_qp.c

   1 /*
   2  * Copyright (c) 2016 Hisilicon Limited.
   3  * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the
   9  * OpenIB.org BSD license below:
  10  *
  11  *     Redistribution and use in source and binary forms, with or
  12  *     without modification, are permitted provided that the following
  13  *     conditions are met:
  14  *
  15  *      - Redistributions of source code must retain the above
  16  *        copyright notice, this list of conditions and the following
  17  *        disclaimer.
  18  *
  19  *      - Redistributions in binary form must reproduce the above
  20  *        copyright notice, this list of conditions and the following
  21  *        disclaimer in the documentation and/or other materials
  22  *        provided with the distribution.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31  * SOFTWARE.
  32  */
  33
  34 #include <linux/pci.h>
  35 #include <linux/platform_device.h>
  36 #include <rdma/ib_addr.h>
  37 #include <rdma/ib_umem.h>
  38 #include <rdma/uverbs_ioctl.h>
  39 #include "hns_roce_common.h"
  40 #include "hns_roce_device.h"
  41 #include "hns_roce_hem.h"
  42
  43 static void flush_work_handle(struct work_struct *work)
  44 {
  45         struct hns_roce_work *flush_work = container_of(work,
  46                                         struct hns_roce_work, work);
  47         struct hns_roce_qp *hr_qp = container_of(flush_work,
  48                                         struct hns_roce_qp, flush_work);
  49         struct device *dev = flush_work->hr_dev->dev;
  50         struct ib_qp_attr attr;
  51         int attr_mask;
  52         int ret;
  53
  54         attr_mask = IB_QP_STATE;
  55         attr.qp_state = IB_QPS_ERR;
  56
  57         if (test_and_clear_bit(HNS_ROCE_FLUSH_FLAG, &hr_qp->flush_flag)) {
  58                 ret = hns_roce_modify_qp(&hr_qp->ibqp, &attr, attr_mask, NULL);
  59                 if (ret)
  60                         dev_err(dev, "Modify QP to error state failed(%d) during CQE flush\n",
  61                                 ret);
  62         }
  63
  64         /*
  65          * make sure we signal QP destroy leg that flush QP was completed
  66          * so that it can safely proceed ahead now and destroy QP
  67          */
  68         if (refcount_dec_and_test(&hr_qp->refcount))
  69                 complete(&hr_qp->free);
  70 }
  71
  72 void init_flush_work(struct hns_roce_dev *hr_dev, struct hns_roce_qp *hr_qp)
  73 {
  74         struct hns_roce_work *flush_work = &hr_qp->flush_work;
  75
  76         flush_work->hr_dev = hr_dev;
  77         INIT_WORK(&flush_work->work, flush_work_handle);
  78         refcount_inc(&hr_qp->refcount);
  79         queue_work(hr_dev->irq_workq, &flush_work->work);
  80 }
  81
  82 void flush_cqe(struct hns_roce_dev *dev, struct hns_roce_qp *qp)
  83 {
  84         /*
  85          * Hip08 hardware cannot flush the WQEs in SQ/RQ if the QP state
  86          * gets into errored mode. Hence, as a workaround to this
  87          * hardware limitation, driver needs to assist in flushing. But
  88          * the flushing operation uses mailbox to convey the QP state to
  89          * the hardware and which can sleep due to the mutex protection
  90          * around the mailbox calls. Hence, use the deferred flush for
  91          * now.
  92          */
  93         if (!test_and_set_bit(HNS_ROCE_FLUSH_FLAG, &qp->flush_flag))
  94                 init_flush_work(dev, qp);
  95 }
  96
  97 void hns_roce_qp_event(struct hns_roce_dev *hr_dev, u32 qpn, int event_type)
  98 {
  99         struct device *dev = hr_dev->dev;
 100         struct hns_roce_qp *qp;
 101
 102         xa_lock(&hr_dev->qp_table_xa);
 103         qp = __hns_roce_qp_lookup(hr_dev, qpn);
 104         if (qp)
 105                 refcount_inc(&qp->refcount);
 106         xa_unlock(&hr_dev->qp_table_xa);
 107
 108         if (!qp) {
 109                 dev_warn(dev, "Async event for bogus QP %08x\n", qpn);
 110                 return;
 111         }
 112
 113         if (hr_dev->hw_rev != HNS_ROCE_HW_VER1 &&
 114             (event_type == HNS_ROCE_EVENT_TYPE_WQ_CATAS_ERROR ||
 115              event_type == HNS_ROCE_EVENT_TYPE_INV_REQ_LOCAL_WQ_ERROR ||
 116              event_type == HNS_ROCE_EVENT_TYPE_LOCAL_WQ_ACCESS_ERROR ||
 117              event_type == HNS_ROCE_EVENT_TYPE_XRCD_VIOLATION ||
 118              event_type == HNS_ROCE_EVENT_TYPE_INVALID_XRCETH)) {
 119                 qp->state = IB_QPS_ERR;
 120
 121                 flush_cqe(hr_dev, qp);
 122         }
 123
 124         qp->event(qp, (enum hns_roce_event)event_type);
 125
 126         if (refcount_dec_and_test(&qp->refcount))
 127                 complete(&qp->free);
 128 }
 129
 130 static void hns_roce_ib_qp_event(struct hns_roce_qp *hr_qp,
 131                                  enum hns_roce_event type)
 132 {
 133         struct ib_qp *ibqp = &hr_qp->ibqp;
 134         struct ib_event event;
 135
 136         if (ibqp->event_handler) {
 137                 event.device = ibqp->device;
 138                 event.element.qp = ibqp;
 139                 switch (type) {
 140                 case HNS_ROCE_EVENT_TYPE_PATH_MIG:
 141                         event.event = IB_EVENT_PATH_MIG;
 142                         break;
 143                 case HNS_ROCE_EVENT_TYPE_COMM_EST:
 144                         event.event = IB_EVENT_COMM_EST;
 145                         break;
 146                 case HNS_ROCE_EVENT_TYPE_SQ_DRAINED:
 147                         event.event = IB_EVENT_SQ_DRAINED;
 148                         break;
 149                 case HNS_ROCE_EVENT_TYPE_SRQ_LAST_WQE_REACH:
 150                         event.event = IB_EVENT_QP_LAST_WQE_REACHED;
 151                         break;
 152                 case HNS_ROCE_EVENT_TYPE_WQ_CATAS_ERROR:
 153                         event.event = IB_EVENT_QP_FATAL;
 154                         break;
 155                 case HNS_ROCE_EVENT_TYPE_PATH_MIG_FAILED:
 156                         event.event = IB_EVENT_PATH_MIG_ERR;
 157                         break;
 158                 case HNS_ROCE_EVENT_TYPE_INV_REQ_LOCAL_WQ_ERROR:
 159                         event.event = IB_EVENT_QP_REQ_ERR;
 160                         break;
 161                 case HNS_ROCE_EVENT_TYPE_LOCAL_WQ_ACCESS_ERROR:
 162                 case HNS_ROCE_EVENT_TYPE_XRCD_VIOLATION:
 163                 case HNS_ROCE_EVENT_TYPE_INVALID_XRCETH:
 164                         event.event = IB_EVENT_QP_ACCESS_ERR;
 165                         break;
 166                 default:
 167                         dev_dbg(ibqp->device->dev.parent, "roce_ib: Unexpected event type %d on QP %06lx\n",
 168                                 type, hr_qp->qpn);
 169                         return;
 170                 }
 171                 ibqp->event_handler(&event, ibqp->qp_context);
 172         }
 173 }
 174
 175 static u8 get_least_load_bankid_for_qp(struct hns_roce_bank *bank)
 176 {
 177         u32 least_load = bank[0].inuse;
 178         u8 bankid = 0;
 179         u32 bankcnt;
 180         u8 i;
 181
 182         for (i = 1; i < HNS_ROCE_QP_BANK_NUM; i++) {
 183                 bankcnt = bank[i].inuse;
 184                 if (bankcnt < least_load) {
 185                         least_load = bankcnt;
 186                         bankid = i;
 187                 }
 188         }
 189
 190         return bankid;
 191 }
 192
 193 static int alloc_qpn_with_bankid(struct hns_roce_bank *bank, u8 bankid,
 194                                  unsigned long *qpn)
 195 {
 196         int id;
 197
 198         id = ida_alloc_range(&bank->ida, bank->next, bank->max, GFP_KERNEL);
 199         if (id < 0) {
 200                 id = ida_alloc_range(&bank->ida, bank->min, bank->max,
 201                                      GFP_KERNEL);
 202                 if (id < 0)
 203                         return id;
 204         }
 205
 206         /* the QPN should keep increasing until the max value is reached. */
 207         bank->next = (id + 1) > bank->max ? bank->min : id + 1;
 208
 209         /* the lower 3 bits is bankid */
 210         *qpn = (id << 3) | bankid;
 211
 212         return 0;
 213 }
 214 static int alloc_qpn(struct hns_roce_dev *hr_dev, struct hns_roce_qp *hr_qp)
 215 {
 216         struct hns_roce_qp_table *qp_table = &hr_dev->qp_table;
 217         unsigned long num = 0;
 218         u8 bankid;
 219         int ret;
 220
 221         if (hr_qp->ibqp.qp_type == IB_QPT_GSI) {
 222                 /* when hw version is v1, the sqpn is allocated */
 223                 if (hr_dev->hw_rev == HNS_ROCE_HW_VER1)
 224                         num = HNS_ROCE_MAX_PORTS +
 225                               hr_dev->iboe.phy_port[hr_qp->port];
 226                 else
 227                         num = 1;
 228
 229                 hr_qp->doorbell_qpn = 1;
 230         } else {
 231                 mutex_lock(&qp_table->bank_mutex);
 232                 bankid = get_least_load_bankid_for_qp(qp_table->bank);
 233
 234                 ret = alloc_qpn_with_bankid(&qp_table->bank[bankid], bankid,
 235                                             &num);
 236                 if (ret) {
 237                         ibdev_err(&hr_dev->ib_dev,
 238                                   "failed to alloc QPN, ret = %d\n", ret);
 239                         mutex_unlock(&qp_table->bank_mutex);
 240                         return ret;
 241                 }
 242
 243                 qp_table->bank[bankid].inuse++;
 244                 mutex_unlock(&qp_table->bank_mutex);
 245
 246                 hr_qp->doorbell_qpn = (u32)num;
 247         }
 248
 249         hr_qp->qpn = num;
 250
 251         return 0;
 252 }
 253
 254 enum hns_roce_qp_state to_hns_roce_state(enum ib_qp_state state)
 255 {
 256         switch (state) {
 257         case IB_QPS_RESET:
 258                 return HNS_ROCE_QP_STATE_RST;
 259         case IB_QPS_INIT:
 260                 return HNS_ROCE_QP_STATE_INIT;
 261         case IB_QPS_RTR:
 262                 return HNS_ROCE_QP_STATE_RTR;
 263         case IB_QPS_RTS:
 264                 return HNS_ROCE_QP_STATE_RTS;
 265         case IB_QPS_SQD:
 266                 return HNS_ROCE_QP_STATE_SQD;
 267         case IB_QPS_ERR:
 268                 return HNS_ROCE_QP_STATE_ERR;
 269         default:
 270                 return HNS_ROCE_QP_NUM_STATE;
 271         }
 272 }
 273
 274 static void add_qp_to_list(struct hns_roce_dev *hr_dev,
 275                            struct hns_roce_qp *hr_qp,
 276                            struct ib_cq *send_cq, struct ib_cq *recv_cq)
 277 {
 278         struct hns_roce_cq *hr_send_cq, *hr_recv_cq;
 279         unsigned long flags;
 280
 281         hr_send_cq = send_cq ? to_hr_cq(send_cq) : NULL;
 282         hr_recv_cq = recv_cq ? to_hr_cq(recv_cq) : NULL;
 283
 284         spin_lock_irqsave(&hr_dev->qp_list_lock, flags);
 285         hns_roce_lock_cqs(hr_send_cq, hr_recv_cq);
 286
 287         list_add_tail(&hr_qp->node, &hr_dev->qp_list);
 288         if (hr_send_cq)
 289                 list_add_tail(&hr_qp->sq_node, &hr_send_cq->sq_list);
 290         if (hr_recv_cq)
 291                 list_add_tail(&hr_qp->rq_node, &hr_recv_cq->rq_list);
 292
 293         hns_roce_unlock_cqs(hr_send_cq, hr_recv_cq);
 294         spin_unlock_irqrestore(&hr_dev->qp_list_lock, flags);
 295 }
 296
 297 static int hns_roce_qp_store(struct hns_roce_dev *hr_dev,
 298                              struct hns_roce_qp *hr_qp,
 299                              struct ib_qp_init_attr *init_attr)
 300 {
 301         struct xarray *xa = &hr_dev->qp_table_xa;
 302         int ret;
 303
 304         if (!hr_qp->qpn)
 305                 return -EINVAL;
 306
 307         ret = xa_err(xa_store_irq(xa, hr_qp->qpn, hr_qp, GFP_KERNEL));
 308         if (ret)
 309                 dev_err(hr_dev->dev, "Failed to xa store for QPC\n");
 310         else
 311                 /* add QP to device's QP list for softwc */
 312                 add_qp_to_list(hr_dev, hr_qp, init_attr->send_cq,
 313                                init_attr->recv_cq);
 314
 315         return ret;
 316 }
 317
 318 static int alloc_qpc(struct hns_roce_dev *hr_dev, struct hns_roce_qp *hr_qp)
 319 {
 320         struct hns_roce_qp_table *qp_table = &hr_dev->qp_table;
 321         struct device *dev = hr_dev->dev;
 322         int ret;
 323
 324         if (!hr_qp->qpn)
 325                 return -EINVAL;
 326
 327         /* In v1 engine, GSI QP context is saved in the RoCE hw's register */
 328         if (hr_qp->ibqp.qp_type == IB_QPT_GSI &&
 329             hr_dev->hw_rev == HNS_ROCE_HW_VER1)
 330                 return 0;
 331
 332         /* Alloc memory for QPC */
 333         ret = hns_roce_table_get(hr_dev, &qp_table->qp_table, hr_qp->qpn);
 334         if (ret) {
 335                 dev_err(dev, "Failed to get QPC table\n");
 336                 goto err_out;
 337         }
 338
 339         /* Alloc memory for IRRL */
 340         ret = hns_roce_table_get(hr_dev, &qp_table->irrl_table, hr_qp->qpn);
 341         if (ret) {
 342                 dev_err(dev, "Failed to get IRRL table\n");
 343                 goto err_put_qp;
 344         }
 345
 346         if (hr_dev->caps.trrl_entry_sz) {
 347                 /* Alloc memory for TRRL */
 348                 ret = hns_roce_table_get(hr_dev, &qp_table->trrl_table,
 349                                          hr_qp->qpn);
 350                 if (ret) {
 351                         dev_err(dev, "Failed to get TRRL table\n");
 352                         goto err_put_irrl;
 353                 }
 354         }
 355
 356         if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_QP_FLOW_CTRL) {
 357                 /* Alloc memory for SCC CTX */
 358                 ret = hns_roce_table_get(hr_dev, &qp_table->sccc_table,
 359                                          hr_qp->qpn);
 360                 if (ret) {
 361                         dev_err(dev, "Failed to get SCC CTX table\n");
 362                         goto err_put_trrl;
 363                 }
 364         }
 365
 366         return 0;
 367
 368 err_put_trrl:
 369         if (hr_dev->caps.trrl_entry_sz)
 370                 hns_roce_table_put(hr_dev, &qp_table->trrl_table, hr_qp->qpn);
 371
 372 err_put_irrl:
 373         hns_roce_table_put(hr_dev, &qp_table->irrl_table, hr_qp->qpn);
 374
 375 err_put_qp:
 376         hns_roce_table_put(hr_dev, &qp_table->qp_table, hr_qp->qpn);
 377
 378 err_out:
 379         return ret;
 380 }
 381
 382 void hns_roce_qp_remove(struct hns_roce_dev *hr_dev, struct hns_roce_qp *hr_qp)
 383 {
 384         struct xarray *xa = &hr_dev->qp_table_xa;
 385         unsigned long flags;
 386
 387         list_del(&hr_qp->node);
 388
 389         if (hr_qp->ibqp.qp_type != IB_QPT_XRC_TGT)
 390                 list_del(&hr_qp->sq_node);
 391
 392         if (hr_qp->ibqp.qp_type != IB_QPT_XRC_INI &&
 393             hr_qp->ibqp.qp_type != IB_QPT_XRC_TGT)
 394                 list_del(&hr_qp->rq_node);
 395
 396         xa_lock_irqsave(xa, flags);
 397         __xa_erase(xa, hr_qp->qpn);
 398         xa_unlock_irqrestore(xa, flags);
 399 }
 400
 401 static void free_qpc(struct hns_roce_dev *hr_dev, struct hns_roce_qp *hr_qp)
 402 {
 403         struct hns_roce_qp_table *qp_table = &hr_dev->qp_table;
 404
 405         /* In v1 engine, GSI QP context is saved in the RoCE hw's register */
 406         if (hr_qp->ibqp.qp_type == IB_QPT_GSI &&
 407             hr_dev->hw_rev == HNS_ROCE_HW_VER1)
 408                 return;
 409
 410         if (hr_dev->caps.trrl_entry_sz)
 411                 hns_roce_table_put(hr_dev, &qp_table->trrl_table, hr_qp->qpn);
 412         hns_roce_table_put(hr_dev, &qp_table->irrl_table, hr_qp->qpn);
 413 }
 414
 415 static inline u8 get_qp_bankid(unsigned long qpn)
 416 {
 417         /* The lower 3 bits of QPN are used to hash to different banks */
 418         return (u8)(qpn & GENMASK(2, 0));
 419 }
 420
 421 static void free_qpn(struct hns_roce_dev *hr_dev, struct hns_roce_qp *hr_qp)
 422 {
 423         u8 bankid;
 424
 425         if (hr_qp->ibqp.qp_type == IB_QPT_GSI)
 426                 return;
 427
 428         if (hr_qp->qpn < hr_dev->caps.reserved_qps)
 429                 return;
 430
 431         bankid = get_qp_bankid(hr_qp->qpn);
 432
 433         ida_free(&hr_dev->qp_table.bank[bankid].ida, hr_qp->qpn >> 3);
 434
 435         mutex_lock(&hr_dev->qp_table.bank_mutex);
 436         hr_dev->qp_table.bank[bankid].inuse--;
 437         mutex_unlock(&hr_dev->qp_table.bank_mutex);
 438 }
 439
 440 static u32 proc_rq_sge(struct hns_roce_dev *dev, struct hns_roce_qp *hr_qp,
 441                        bool user)
 442 {
 443         u32 max_sge = dev->caps.max_rq_sg;
 444
 445         if (dev->pci_dev->revision >= PCI_REVISION_ID_HIP09)
 446                 return max_sge;
 447
 448         /* Reserve SGEs only for HIP08 in kernel; The userspace driver will
 449          * calculate number of max_sge with reserved SGEs when allocating wqe
 450          * buf, so there is no need to do this again in kernel. But the number
 451          * may exceed the capacity of SGEs recorded in the firmware, so the
 452          * kernel driver should just adapt the value accordingly.
 453          */
 454         if (user)
 455                 max_sge = roundup_pow_of_two(max_sge + 1);
 456         else
 457                 hr_qp->rq.rsv_sge = 1;
 458
 459         return max_sge;
 460 }
 461
 462 static int set_rq_size(struct hns_roce_dev *hr_dev, struct ib_qp_cap *cap,
 463                        struct hns_roce_qp *hr_qp, int has_rq, bool user)
 464 {
 465         u32 max_sge = proc_rq_sge(hr_dev, hr_qp, user);
 466         u32 cnt;
 467
 468         /* If srq exist, set zero for relative number of rq */
 469         if (!has_rq) {
 470                 hr_qp->rq.wqe_cnt = 0;
 471                 hr_qp->rq.max_gs = 0;
 472                 hr_qp->rq_inl_buf.wqe_cnt = 0;
 473                 cap->max_recv_wr = 0;
 474                 cap->max_recv_sge = 0;
 475
 476                 return 0;
 477         }
 478
 479         /* Check the validity of QP support capacity */
 480         if (!cap->max_recv_wr || cap->max_recv_wr > hr_dev->caps.max_wqes ||
 481             cap->max_recv_sge > max_sge) {
 482                 ibdev_err(&hr_dev->ib_dev,
 483                           "RQ config error, depth = %u, sge = %u\n",
 484                           cap->max_recv_wr, cap->max_recv_sge);
 485                 return -EINVAL;
 486         }
 487
 488         cnt = roundup_pow_of_two(max(cap->max_recv_wr, hr_dev->caps.min_wqes));
 489         if (cnt > hr_dev->caps.max_wqes) {
 490                 ibdev_err(&hr_dev->ib_dev, "rq depth %u too large\n",
 491                           cap->max_recv_wr);
 492                 return -EINVAL;
 493         }
 494
 495         hr_qp->rq.max_gs = roundup_pow_of_two(max(1U, cap->max_recv_sge) +
 496                                               hr_qp->rq.rsv_sge);
 497
 498         if (hr_dev->caps.max_rq_sg <= HNS_ROCE_SGE_IN_WQE)
 499                 hr_qp->rq.wqe_shift = ilog2(hr_dev->caps.max_rq_desc_sz);
 500         else
 501                 hr_qp->rq.wqe_shift = ilog2(hr_dev->caps.max_rq_desc_sz *
 502                                             hr_qp->rq.max_gs);
 503
 504         hr_qp->rq.wqe_cnt = cnt;
 505         if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RQ_INLINE &&
 506             hr_qp->ibqp.qp_type != IB_QPT_UD &&
 507             hr_qp->ibqp.qp_type != IB_QPT_GSI)
 508                 hr_qp->rq_inl_buf.wqe_cnt = cnt;
 509         else
 510                 hr_qp->rq_inl_buf.wqe_cnt = 0;
 511
 512         cap->max_recv_wr = cnt;
 513         cap->max_recv_sge = hr_qp->rq.max_gs - hr_qp->rq.rsv_sge;
 514
 515         return 0;
 516 }
 517
 518 static u32 get_wqe_ext_sge_cnt(struct hns_roce_qp *qp)
 519 {
 520         /* GSI/UD QP only has extended sge */
 521         if (qp->ibqp.qp_type == IB_QPT_GSI || qp->ibqp.qp_type == IB_QPT_UD)
 522                 return qp->sq.max_gs;
 523
 524         if (qp->sq.max_gs > HNS_ROCE_SGE_IN_WQE)
 525                 return qp->sq.max_gs - HNS_ROCE_SGE_IN_WQE;
 526
 527         return 0;
 528 }
 529
 530 static void set_ext_sge_param(struct hns_roce_dev *hr_dev, u32 sq_wqe_cnt,
 531                               struct hns_roce_qp *hr_qp, struct ib_qp_cap *cap)
 532 {
 533         u32 total_sge_cnt;
 534         u32 wqe_sge_cnt;
 535
 536         hr_qp->sge.sge_shift = HNS_ROCE_SGE_SHIFT;
 537
 538         if (hr_dev->hw_rev == HNS_ROCE_HW_VER1) {
 539                 hr_qp->sq.max_gs = HNS_ROCE_SGE_IN_WQE;
 540                 return;
 541         }
 542
 543         hr_qp->sq.max_gs = max(1U, cap->max_send_sge);
 544
 545         wqe_sge_cnt = get_wqe_ext_sge_cnt(hr_qp);
 546
 547         /* If the number of extended sge is not zero, they MUST use the
 548          * space of HNS_HW_PAGE_SIZE at least.
 549          */
 550         if (wqe_sge_cnt) {
 551                 total_sge_cnt = roundup_pow_of_two(sq_wqe_cnt * wqe_sge_cnt);
 552                 hr_qp->sge.sge_cnt = max(total_sge_cnt,
 553                                 (u32)HNS_HW_PAGE_SIZE / HNS_ROCE_SGE_SIZE);
 554         }
 555 }
 556
 557 static int check_sq_size_with_integrity(struct hns_roce_dev *hr_dev,
 558                                         struct ib_qp_cap *cap,
 559                                         struct hns_roce_ib_create_qp *ucmd)
 560 {
 561         u32 roundup_sq_stride = roundup_pow_of_two(hr_dev->caps.max_sq_desc_sz);
 562         u8 max_sq_stride = ilog2(roundup_sq_stride);
 563
 564         /* Sanity check SQ size before proceeding */
 565         if (ucmd->log_sq_stride > max_sq_stride ||
 566             ucmd->log_sq_stride < HNS_ROCE_IB_MIN_SQ_STRIDE) {
 567                 ibdev_err(&hr_dev->ib_dev, "failed to check SQ stride size.\n");
 568                 return -EINVAL;
 569         }
 570
 571         if (cap->max_send_sge > hr_dev->caps.max_sq_sg) {
 572                 ibdev_err(&hr_dev->ib_dev, "failed to check SQ SGE size %u.\n",
 573                           cap->max_send_sge);
 574                 return -EINVAL;
 575         }
 576
 577         return 0;
 578 }
 579
 580 static int set_user_sq_size(struct hns_roce_dev *hr_dev,
 581                             struct ib_qp_cap *cap, struct hns_roce_qp *hr_qp,
 582                             struct hns_roce_ib_create_qp *ucmd)
 583 {
 584         struct ib_device *ibdev = &hr_dev->ib_dev;
 585         u32 cnt = 0;
 586         int ret;
 587
 588         if (check_shl_overflow(1, ucmd->log_sq_bb_count, &cnt) ||
 589             cnt > hr_dev->caps.max_wqes)
 590                 return -EINVAL;
 591
 592         ret = check_sq_size_with_integrity(hr_dev, cap, ucmd);
 593         if (ret) {
 594                 ibdev_err(ibdev, "failed to check user SQ size, ret = %d.\n",
 595                           ret);
 596                 return ret;
 597         }
 598
 599         set_ext_sge_param(hr_dev, cnt, hr_qp, cap);
 600
 601         hr_qp->sq.wqe_shift = ucmd->log_sq_stride;
 602         hr_qp->sq.wqe_cnt = cnt;
 603
 604         return 0;
 605 }
 606
 607 static int set_wqe_buf_attr(struct hns_roce_dev *hr_dev,
 608                             struct hns_roce_qp *hr_qp,
 609                             struct hns_roce_buf_attr *buf_attr)
 610 {
 611         int buf_size;
 612         int idx = 0;
 613
 614         hr_qp->buff_size = 0;
 615
 616         /* SQ WQE */
 617         hr_qp->sq.offset = 0;
 618         buf_size = to_hr_hem_entries_size(hr_qp->sq.wqe_cnt,
 619                                           hr_qp->sq.wqe_shift);
 620         if (buf_size > 0 && idx < ARRAY_SIZE(buf_attr->region)) {
 621                 buf_attr->region[idx].size = buf_size;
 622                 buf_attr->region[idx].hopnum = hr_dev->caps.wqe_sq_hop_num;
 623                 idx++;
 624                 hr_qp->buff_size += buf_size;
 625         }
 626
 627         /* extend SGE WQE in SQ */
 628         hr_qp->sge.offset = hr_qp->buff_size;
 629         buf_size = to_hr_hem_entries_size(hr_qp->sge.sge_cnt,
 630                                           hr_qp->sge.sge_shift);
 631         if (buf_size > 0 && idx < ARRAY_SIZE(buf_attr->region)) {
 632                 buf_attr->region[idx].size = buf_size;
 633                 buf_attr->region[idx].hopnum = hr_dev->caps.wqe_sge_hop_num;
 634                 idx++;
 635                 hr_qp->buff_size += buf_size;
 636         }
 637
 638         /* RQ WQE */
 639         hr_qp->rq.offset = hr_qp->buff_size;
 640         buf_size = to_hr_hem_entries_size(hr_qp->rq.wqe_cnt,
 641                                           hr_qp->rq.wqe_shift);
 642         if (buf_size > 0 && idx < ARRAY_SIZE(buf_attr->region)) {
 643                 buf_attr->region[idx].size = buf_size;
 644                 buf_attr->region[idx].hopnum = hr_dev->caps.wqe_rq_hop_num;
 645                 idx++;
 646                 hr_qp->buff_size += buf_size;
 647         }
 648
 649         if (hr_qp->buff_size < 1)
 650                 return -EINVAL;
 651
 652         buf_attr->page_shift = HNS_HW_PAGE_SHIFT + hr_dev->caps.mtt_buf_pg_sz;
 653         buf_attr->region_count = idx;
 654
 655         return 0;
 656 }
 657
 658 static int set_kernel_sq_size(struct hns_roce_dev *hr_dev,
 659                               struct ib_qp_cap *cap, struct hns_roce_qp *hr_qp)
 660 {
 661         struct ib_device *ibdev = &hr_dev->ib_dev;
 662         u32 cnt;
 663
 664         if (!cap->max_send_wr || cap->max_send_wr > hr_dev->caps.max_wqes ||
 665             cap->max_send_sge > hr_dev->caps.max_sq_sg) {
 666                 ibdev_err(ibdev, "failed to check SQ WR or SGE num.\n");
 667                 return -EINVAL;
 668         }
 669
 670         cnt = roundup_pow_of_two(max(cap->max_send_wr, hr_dev->caps.min_wqes));
 671         if (cnt > hr_dev->caps.max_wqes) {
 672                 ibdev_err(ibdev, "failed to check WQE num, WQE num = %u.\n",
 673                           cnt);
 674                 return -EINVAL;
 675         }
 676
 677         hr_qp->sq.wqe_shift = ilog2(hr_dev->caps.max_sq_desc_sz);
 678         hr_qp->sq.wqe_cnt = cnt;
 679
 680         set_ext_sge_param(hr_dev, cnt, hr_qp, cap);
 681
 682         /* sync the parameters of kernel QP to user's configuration */
 683         cap->max_send_wr = cnt;
 684         cap->max_send_sge = hr_qp->sq.max_gs;
 685
 686         return 0;
 687 }
 688
 689 static int hns_roce_qp_has_sq(struct ib_qp_init_attr *attr)
 690 {
 691         if (attr->qp_type == IB_QPT_XRC_TGT || !attr->cap.max_send_wr)
 692                 return 0;
 693
 694         return 1;
 695 }
 696
 697 static int hns_roce_qp_has_rq(struct ib_qp_init_attr *attr)
 698 {
 699         if (attr->qp_type == IB_QPT_XRC_INI ||
 700             attr->qp_type == IB_QPT_XRC_TGT || attr->srq ||
 701             !attr->cap.max_recv_wr)
 702                 return 0;
 703
 704         return 1;
 705 }
 706
 707 static int alloc_rq_inline_buf(struct hns_roce_qp *hr_qp,
 708                                struct ib_qp_init_attr *init_attr)
 709 {
 710         u32 max_recv_sge = init_attr->cap.max_recv_sge;
 711         u32 wqe_cnt = hr_qp->rq_inl_buf.wqe_cnt;
 712         struct hns_roce_rinl_wqe *wqe_list;
 713         int i;
 714
 715         /* allocate recv inline buf */
 716         wqe_list = kcalloc(wqe_cnt, sizeof(struct hns_roce_rinl_wqe),
 717                            GFP_KERNEL);
 718         if (!wqe_list)
 719                 goto err;
 720
 721         /* Allocate a continuous buffer for all inline sge we need */
 722         wqe_list[0].sg_list = kcalloc(wqe_cnt, (max_recv_sge *
 723                                       sizeof(struct hns_roce_rinl_sge)),
 724                                       GFP_KERNEL);
 725         if (!wqe_list[0].sg_list)
 726                 goto err_wqe_list;
 727
 728         /* Assign buffers of sg_list to each inline wqe */
 729         for (i = 1; i < wqe_cnt; i++)
 730                 wqe_list[i].sg_list = &wqe_list[0].sg_list[i * max_recv_sge];
 731
 732         hr_qp->rq_inl_buf.wqe_list = wqe_list;
 733
 734         return 0;
 735
 736 err_wqe_list:
 737         kfree(wqe_list);
 738
 739 err:
 740         return -ENOMEM;
 741 }
 742
 743 static void free_rq_inline_buf(struct hns_roce_qp *hr_qp)
 744 {
 745         if (hr_qp->rq_inl_buf.wqe_list)
 746                 kfree(hr_qp->rq_inl_buf.wqe_list[0].sg_list);
 747         kfree(hr_qp->rq_inl_buf.wqe_list);
 748 }
 749
 750 static int alloc_qp_buf(struct hns_roce_dev *hr_dev, struct hns_roce_qp *hr_qp,
 751                         struct ib_qp_init_attr *init_attr,
 752                         struct ib_udata *udata, unsigned long addr)
 753 {
 754         struct ib_device *ibdev = &hr_dev->ib_dev;
 755         struct hns_roce_buf_attr buf_attr = {};
 756         int ret;
 757
 758         if (!udata && hr_qp->rq_inl_buf.wqe_cnt) {
 759                 ret = alloc_rq_inline_buf(hr_qp, init_attr);
 760                 if (ret) {
 761                         ibdev_err(ibdev,
 762                                   "failed to alloc inline buf, ret = %d.\n",
 763                                   ret);
 764                         return ret;
 765                 }
 766         } else {
 767                 hr_qp->rq_inl_buf.wqe_list = NULL;
 768         }
 769
 770         ret = set_wqe_buf_attr(hr_dev, hr_qp, &buf_attr);
 771         if (ret) {
 772                 ibdev_err(ibdev, "failed to split WQE buf, ret = %d.\n", ret);
 773                 goto err_inline;
 774         }
 775         ret = hns_roce_mtr_create(hr_dev, &hr_qp->mtr, &buf_attr,
 776                                   PAGE_SHIFT + hr_dev->caps.mtt_ba_pg_sz,
 777                                   udata, addr);
 778         if (ret) {
 779                 ibdev_err(ibdev, "failed to create WQE mtr, ret = %d.\n", ret);
 780                 goto err_inline;
 781         }
 782
 783         return 0;
 784 err_inline:
 785         free_rq_inline_buf(hr_qp);
 786
 787         return ret;
 788 }
 789
 790 static void free_qp_buf(struct hns_roce_dev *hr_dev, struct hns_roce_qp *hr_qp)
 791 {
 792         hns_roce_mtr_destroy(hr_dev, &hr_qp->mtr);
 793         free_rq_inline_buf(hr_qp);
 794 }
 795
 796 static inline bool user_qp_has_sdb(struct hns_roce_dev *hr_dev,
 797                                    struct ib_qp_init_attr *init_attr,
 798                                    struct ib_udata *udata,
 799                                    struct hns_roce_ib_create_qp_resp *resp,
 800                                    struct hns_roce_ib_create_qp *ucmd)
 801 {
 802         return ((hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_QP_RECORD_DB) &&
 803                 udata->outlen >= offsetofend(typeof(*resp), cap_flags) &&
 804                 hns_roce_qp_has_sq(init_attr) &&
 805                 udata->inlen >= offsetofend(typeof(*ucmd), sdb_addr));
 806 }
 807
 808 static inline bool user_qp_has_rdb(struct hns_roce_dev *hr_dev,
 809                                    struct ib_qp_init_attr *init_attr,
 810                                    struct ib_udata *udata,
 811                                    struct hns_roce_ib_create_qp_resp *resp)
 812 {
 813         return ((hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_QP_RECORD_DB) &&
 814                 udata->outlen >= offsetofend(typeof(*resp), cap_flags) &&
 815                 hns_roce_qp_has_rq(init_attr));
 816 }
 817
 818 static inline bool kernel_qp_has_rdb(struct hns_roce_dev *hr_dev,
 819                                      struct ib_qp_init_attr *init_attr)
 820 {
 821         return ((hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_QP_RECORD_DB) &&
 822                 hns_roce_qp_has_rq(init_attr));
 823 }
 824
 825 static int alloc_user_qp_db(struct hns_roce_dev *hr_dev,
 826                             struct hns_roce_qp *hr_qp,
 827                             struct ib_qp_init_attr *init_attr,
 828                             struct ib_udata *udata,
 829                             struct hns_roce_ib_create_qp *ucmd,
 830                             struct hns_roce_ib_create_qp_resp *resp)
 831 {
 832         struct hns_roce_ucontext *uctx = rdma_udata_to_drv_context(udata,
 833                 struct hns_roce_ucontext, ibucontext);
 834         struct ib_device *ibdev = &hr_dev->ib_dev;
 835         int ret;
 836
 837         if (user_qp_has_sdb(hr_dev, init_attr, udata, resp, ucmd)) {
 838                 ret = hns_roce_db_map_user(uctx, ucmd->sdb_addr, &hr_qp->sdb);
 839                 if (ret) {
 840                         ibdev_err(ibdev,
 841                                   "failed to map user SQ doorbell, ret = %d.\n",
 842                                   ret);
 843                         goto err_out;
 844                 }
 845                 hr_qp->en_flags |= HNS_ROCE_QP_CAP_SQ_RECORD_DB;
 846         }
 847
 848         if (user_qp_has_rdb(hr_dev, init_attr, udata, resp)) {
 849                 ret = hns_roce_db_map_user(uctx, ucmd->db_addr, &hr_qp->rdb);
 850                 if (ret) {
 851                         ibdev_err(ibdev,
 852                                   "failed to map user RQ doorbell, ret = %d.\n",
 853                                   ret);
 854                         goto err_sdb;
 855                 }
 856                 hr_qp->en_flags |= HNS_ROCE_QP_CAP_RQ_RECORD_DB;
 857         }
 858
 859         return 0;
 860
 861 err_sdb:
 862         if (hr_qp->en_flags & HNS_ROCE_QP_CAP_SQ_RECORD_DB)
 863                 hns_roce_db_unmap_user(uctx, &hr_qp->sdb);
 864 err_out:
 865         return ret;
 866 }
 867
 868 static int alloc_kernel_qp_db(struct hns_roce_dev *hr_dev,
 869                               struct hns_roce_qp *hr_qp,
 870                               struct ib_qp_init_attr *init_attr)
 871 {
 872         struct ib_device *ibdev = &hr_dev->ib_dev;
 873         int ret;
 874
 875         if (hr_dev->pci_dev->revision >= PCI_REVISION_ID_HIP09)
 876                 hr_qp->sq.db_reg = hr_dev->mem_base +
 877                                    HNS_ROCE_DWQE_SIZE * hr_qp->qpn;
 878         else
 879                 hr_qp->sq.db_reg = hr_dev->reg_base + hr_dev->sdb_offset +
 880                                    DB_REG_OFFSET * hr_dev->priv_uar.index;
 881
 882         hr_qp->rq.db_reg = hr_dev->reg_base + hr_dev->odb_offset +
 883                            DB_REG_OFFSET * hr_dev->priv_uar.index;
 884
 885         if (kernel_qp_has_rdb(hr_dev, init_attr)) {
 886                 ret = hns_roce_alloc_db(hr_dev, &hr_qp->rdb, 0);
 887                 if (ret) {
 888                         ibdev_err(ibdev,
 889                                   "failed to alloc kernel RQ doorbell, ret = %d.\n",
 890                                   ret);
 891                         return ret;
 892                 }
 893                 *hr_qp->rdb.db_record = 0;
 894                 hr_qp->en_flags |= HNS_ROCE_QP_CAP_RQ_RECORD_DB;
 895         }
 896
 897         return 0;
 898 }
 899
 900 static int alloc_qp_db(struct hns_roce_dev *hr_dev, struct hns_roce_qp *hr_qp,
 901                        struct ib_qp_init_attr *init_attr,
 902                        struct ib_udata *udata,
 903                        struct hns_roce_ib_create_qp *ucmd,
 904                        struct hns_roce_ib_create_qp_resp *resp)
 905 {
 906         int ret;
 907
 908         if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_SDI_MODE)
 909                 hr_qp->en_flags |= HNS_ROCE_QP_CAP_OWNER_DB;
 910
 911         if (udata) {
 912                 ret = alloc_user_qp_db(hr_dev, hr_qp, init_attr, udata, ucmd,
 913                                        resp);
 914                 if (ret)
 915                         return ret;
 916         } else {
 917                 ret = alloc_kernel_qp_db(hr_dev, hr_qp, init_attr);
 918                 if (ret)
 919                         return ret;
 920         }
 921
 922         return 0;
 923 }
 924
 925 static void free_qp_db(struct hns_roce_dev *hr_dev, struct hns_roce_qp *hr_qp,
 926                        struct ib_udata *udata)
 927 {
 928         struct hns_roce_ucontext *uctx = rdma_udata_to_drv_context(
 929                 udata, struct hns_roce_ucontext, ibucontext);
 930
 931         if (udata) {
 932                 if (hr_qp->en_flags & HNS_ROCE_QP_CAP_RQ_RECORD_DB)
 933                         hns_roce_db_unmap_user(uctx, &hr_qp->rdb);
 934                 if (hr_qp->en_flags & HNS_ROCE_QP_CAP_SQ_RECORD_DB)
 935                         hns_roce_db_unmap_user(uctx, &hr_qp->sdb);
 936         } else {
 937                 if (hr_qp->en_flags & HNS_ROCE_QP_CAP_RQ_RECORD_DB)
 938                         hns_roce_free_db(hr_dev, &hr_qp->rdb);
 939         }
 940 }
 941
 942 static int alloc_kernel_wrid(struct hns_roce_dev *hr_dev,
 943                              struct hns_roce_qp *hr_qp)
 944 {
 945         struct ib_device *ibdev = &hr_dev->ib_dev;
 946         u64 *sq_wrid = NULL;
 947         u64 *rq_wrid = NULL;
 948         int ret;
 949
 950         sq_wrid = kcalloc(hr_qp->sq.wqe_cnt, sizeof(u64), GFP_KERNEL);
 951         if (ZERO_OR_NULL_PTR(sq_wrid)) {
 952                 ibdev_err(ibdev, "failed to alloc SQ wrid.\n");
 953                 return -ENOMEM;
 954         }
 955
 956         if (hr_qp->rq.wqe_cnt) {
 957                 rq_wrid = kcalloc(hr_qp->rq.wqe_cnt, sizeof(u64), GFP_KERNEL);
 958                 if (ZERO_OR_NULL_PTR(rq_wrid)) {
 959                         ibdev_err(ibdev, "failed to alloc RQ wrid.\n");
 960                         ret = -ENOMEM;
 961                         goto err_sq;
 962                 }
 963         }
 964
 965         hr_qp->sq.wrid = sq_wrid;
 966         hr_qp->rq.wrid = rq_wrid;
 967         return 0;
 968 err_sq:
 969         kfree(sq_wrid);
 970
 971         return ret;
 972 }
 973
 974 static void free_kernel_wrid(struct hns_roce_qp *hr_qp)
 975 {
 976         kfree(hr_qp->rq.wrid);
 977         kfree(hr_qp->sq.wrid);
 978 }
 979
 980 static int set_qp_param(struct hns_roce_dev *hr_dev, struct hns_roce_qp *hr_qp,
 981                         struct ib_qp_init_attr *init_attr,
 982                         struct ib_udata *udata,
 983                         struct hns_roce_ib_create_qp *ucmd)
 984 {
 985         struct ib_device *ibdev = &hr_dev->ib_dev;
 986         int ret;
 987
 988         if (init_attr->cap.max_inline_data > hr_dev->caps.max_sq_inline)
 989                 init_attr->cap.max_inline_data = hr_dev->caps.max_sq_inline;
 990
 991         hr_qp->max_inline_data = init_attr->cap.max_inline_data;
 992
 993         if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR)
 994                 hr_qp->sq_signal_bits = IB_SIGNAL_ALL_WR;
 995         else
 996                 hr_qp->sq_signal_bits = IB_SIGNAL_REQ_WR;
 997
 998         ret = set_rq_size(hr_dev, &init_attr->cap, hr_qp,
 999                           hns_roce_qp_has_rq(init_attr), !!udata);
1000         if (ret) {
1001                 ibdev_err(ibdev, "failed to set user RQ size, ret = %d.\n",
1002                           ret);
1003                 return ret;
1004         }
1005
1006         if (udata) {
1007                 ret = ib_copy_from_udata(ucmd, udata,
1008                                          min(udata->inlen, sizeof(*ucmd)));
1009                 if (ret) {
1010                         ibdev_err(ibdev,
1011                                   "failed to copy QP ucmd, ret = %d\n", ret);
1012                         return ret;
1013                 }
1014
1015                 ret = set_user_sq_size(hr_dev, &init_attr->cap, hr_qp, ucmd);
1016                 if (ret)
1017                         ibdev_err(ibdev,
1018                                   "failed to set user SQ size, ret = %d.\n",
1019                                   ret);
1020         } else {
1021                 ret = set_kernel_sq_size(hr_dev, &init_attr->cap, hr_qp);
1022                 if (ret)
1023                         ibdev_err(ibdev,
1024                                   "failed to set kernel SQ size, ret = %d.\n",
1025                                   ret);
1026         }
1027
1028         return ret;
1029 }
1030
1031 static int hns_roce_create_qp_common(struct hns_roce_dev *hr_dev,
1032                                      struct ib_pd *ib_pd,
1033                                      struct ib_qp_init_attr *init_attr,
1034                                      struct ib_udata *udata,
1035                                      struct hns_roce_qp *hr_qp)
1036 {
1037         struct hns_roce_ib_create_qp_resp resp = {};
1038         struct ib_device *ibdev = &hr_dev->ib_dev;
1039         struct hns_roce_ib_create_qp ucmd;
1040         int ret;
1041
1042         mutex_init(&hr_qp->mutex);
1043         spin_lock_init(&hr_qp->sq.lock);
1044         spin_lock_init(&hr_qp->rq.lock);
1045
1046         hr_qp->state = IB_QPS_RESET;
1047         hr_qp->flush_flag = 0;
1048
1049         if (init_attr->create_flags)
1050                 return -EOPNOTSUPP;
1051
1052         ret = set_qp_param(hr_dev, hr_qp, init_attr, udata, &ucmd);
1053         if (ret) {
1054                 ibdev_err(ibdev, "failed to set QP param, ret = %d.\n", ret);
1055                 return ret;
1056         }
1057
1058         if (!udata) {
1059                 ret = alloc_kernel_wrid(hr_dev, hr_qp);
1060                 if (ret) {
1061                         ibdev_err(ibdev, "failed to alloc wrid, ret = %d.\n",
1062                                   ret);
1063                         return ret;
1064                 }
1065         }
1066
1067         ret = alloc_qp_buf(hr_dev, hr_qp, init_attr, udata, ucmd.buf_addr);
1068         if (ret) {
1069                 ibdev_err(ibdev, "failed to alloc QP buffer, ret = %d.\n", ret);
1070                 goto err_buf;
1071         }
1072
1073         ret = alloc_qpn(hr_dev, hr_qp);
1074         if (ret) {
1075                 ibdev_err(ibdev, "failed to alloc QPN, ret = %d.\n", ret);
1076                 goto err_qpn;
1077         }
1078
1079         ret = alloc_qp_db(hr_dev, hr_qp, init_attr, udata, &ucmd, &resp);
1080         if (ret) {
1081                 ibdev_err(ibdev, "failed to alloc QP doorbell, ret = %d.\n",
1082                           ret);
1083                 goto err_db;
1084         }
1085
1086         ret = alloc_qpc(hr_dev, hr_qp);
1087         if (ret) {
1088                 ibdev_err(ibdev, "failed to alloc QP context, ret = %d.\n",
1089                           ret);
1090                 goto err_qpc;
1091         }
1092
1093         ret = hns_roce_qp_store(hr_dev, hr_qp, init_attr);
1094         if (ret) {
1095                 ibdev_err(ibdev, "failed to store QP, ret = %d.\n", ret);
1096                 goto err_store;
1097         }
1098
1099         if (udata) {
1100                 resp.cap_flags = hr_qp->en_flags;
1101                 ret = ib_copy_to_udata(udata, &resp,
1102                                        min(udata->outlen, sizeof(resp)));
1103                 if (ret) {
1104                         ibdev_err(ibdev, "copy qp resp failed!\n");
1105                         goto err_store;
1106                 }
1107         }
1108
1109         if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_QP_FLOW_CTRL) {
1110                 ret = hr_dev->hw->qp_flow_control_init(hr_dev, hr_qp);
1111                 if (ret)
1112                         goto err_flow_ctrl;
1113         }
1114
1115         hr_qp->ibqp.qp_num = hr_qp->qpn;
1116         hr_qp->event = hns_roce_ib_qp_event;
1117         refcount_set(&hr_qp->refcount, 1);
1118         init_completion(&hr_qp->free);
1119
1120         return 0;
1121
1122 err_flow_ctrl:
1123         hns_roce_qp_remove(hr_dev, hr_qp);
1124 err_store:
1125         free_qpc(hr_dev, hr_qp);
1126 err_qpc:
1127         free_qp_db(hr_dev, hr_qp, udata);
1128 err_db:
1129         free_qpn(hr_dev, hr_qp);
1130 err_qpn:
1131         free_qp_buf(hr_dev, hr_qp);
1132 err_buf:
1133         free_kernel_wrid(hr_qp);
1134         return ret;
1135 }
1136
1137 void hns_roce_qp_destroy(struct hns_roce_dev *hr_dev, struct hns_roce_qp *hr_qp,
1138                          struct ib_udata *udata)
1139 {
1140         if (refcount_dec_and_test(&hr_qp->refcount))
1141                 complete(&hr_qp->free);
1142         wait_for_completion(&hr_qp->free);
1143
1144         free_qpc(hr_dev, hr_qp);
1145         free_qpn(hr_dev, hr_qp);
1146         free_qp_buf(hr_dev, hr_qp);
1147         free_kernel_wrid(hr_qp);
1148         free_qp_db(hr_dev, hr_qp, udata);
1149 }
1150
1151 static int check_qp_type(struct hns_roce_dev *hr_dev, enum ib_qp_type type,
1152                          bool is_user)
1153 {
1154         switch (type) {
1155         case IB_QPT_XRC_INI:
1156         case IB_QPT_XRC_TGT:
1157                 if (!(hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_XRC))
1158                         goto out;
1159                 break;
1160         case IB_QPT_UD:
1161                 if (hr_dev->pci_dev->revision <= PCI_REVISION_ID_HIP08 &&
1162                     is_user)
1163                         goto out;
1164                 break;
1165         case IB_QPT_RC:
1166         case IB_QPT_GSI:
1167                 break;
1168         default:
1169                 goto out;
1170         }
1171
1172         return 0;
1173
1174 out:
1175         ibdev_err(&hr_dev->ib_dev, "not support QP type %d\n", type);
1176
1177         return -EOPNOTSUPP;
1178 }
1179
1180 int hns_roce_create_qp(struct ib_qp *qp, struct ib_qp_init_attr *init_attr,
1181                        struct ib_udata *udata)
1182 {
1183         struct ib_device *ibdev = qp->device;
1184         struct hns_roce_dev *hr_dev = to_hr_dev(ibdev);
1185         struct hns_roce_qp *hr_qp = to_hr_qp(qp);
1186         struct ib_pd *pd = qp->pd;
1187         int ret;
1188
1189         ret = check_qp_type(hr_dev, init_attr->qp_type, !!udata);
1190         if (ret)
1191                 return ret;
1192
1193         if (init_attr->qp_type == IB_QPT_XRC_TGT)
1194                 hr_qp->xrcdn = to_hr_xrcd(init_attr->xrcd)->xrcdn;
1195
1196         if (init_attr->qp_type == IB_QPT_GSI) {
1197                 hr_qp->port = init_attr->port_num - 1;
1198                 hr_qp->phy_port = hr_dev->iboe.phy_port[hr_qp->port];
1199         }
1200
1201         ret = hns_roce_create_qp_common(hr_dev, pd, init_attr, udata, hr_qp);
1202         if (ret)
1203                 ibdev_err(ibdev, "Create QP type 0x%x failed(%d)\n",
1204                           init_attr->qp_type, ret);
1205
1206         return ret;
1207 }
1208
1209 int to_hr_qp_type(int qp_type)
1210 {
1211         switch (qp_type) {
1212         case IB_QPT_RC:
1213                 return SERV_TYPE_RC;
1214         case IB_QPT_UD:
1215         case IB_QPT_GSI:
1216                 return SERV_TYPE_UD;
1217         case IB_QPT_XRC_INI:
1218         case IB_QPT_XRC_TGT:
1219                 return SERV_TYPE_XRC;
1220         default:
1221                 return -1;
1222         }
1223 }
1224
1225 static int check_mtu_validate(struct hns_roce_dev *hr_dev,
1226                               struct hns_roce_qp *hr_qp,
1227                               struct ib_qp_attr *attr, int attr_mask)
1228 {
1229         enum ib_mtu active_mtu;
1230         int p;
1231
1232         p = attr_mask & IB_QP_PORT ? (attr->port_num - 1) : hr_qp->port;
1233         active_mtu = iboe_get_mtu(hr_dev->iboe.netdevs[p]->mtu);
1234
1235         if ((hr_dev->caps.max_mtu >= IB_MTU_2048 &&
1236             attr->path_mtu > hr_dev->caps.max_mtu) ||
1237             attr->path_mtu < IB_MTU_256 || attr->path_mtu > active_mtu) {
1238                 ibdev_err(&hr_dev->ib_dev,
1239                         "attr path_mtu(%d)invalid while modify qp",
1240                         attr->path_mtu);
1241                 return -EINVAL;
1242         }
1243
1244         return 0;
1245 }
1246
1247 static int hns_roce_check_qp_attr(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1248                                   int attr_mask)
1249 {
1250         struct hns_roce_dev *hr_dev = to_hr_dev(ibqp->device);
1251         struct hns_roce_qp *hr_qp = to_hr_qp(ibqp);
1252         int p;
1253
1254         if ((attr_mask & IB_QP_PORT) &&
1255             (attr->port_num == 0 || attr->port_num > hr_dev->caps.num_ports)) {
1256                 ibdev_err(&hr_dev->ib_dev, "invalid attr, port_num = %u.\n",
1257                           attr->port_num);
1258                 return -EINVAL;
1259         }
1260
1261         if (attr_mask & IB_QP_PKEY_INDEX) {
1262                 p = attr_mask & IB_QP_PORT ? (attr->port_num - 1) : hr_qp->port;
1263                 if (attr->pkey_index >= hr_dev->caps.pkey_table_len[p]) {
1264                         ibdev_err(&hr_dev->ib_dev,
1265                                   "invalid attr, pkey_index = %u.\n",
1266                                   attr->pkey_index);
1267                         return -EINVAL;
1268                 }
1269         }
1270
1271         if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC &&
1272             attr->max_rd_atomic > hr_dev->caps.max_qp_init_rdma) {
1273                 ibdev_err(&hr_dev->ib_dev,
1274                           "invalid attr, max_rd_atomic = %u.\n",
1275                           attr->max_rd_atomic);
1276                 return -EINVAL;
1277         }
1278
1279         if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC &&
1280             attr->max_dest_rd_atomic > hr_dev->caps.max_qp_dest_rdma) {
1281                 ibdev_err(&hr_dev->ib_dev,
1282                           "invalid attr, max_dest_rd_atomic = %u.\n",
1283                           attr->max_dest_rd_atomic);
1284                 return -EINVAL;
1285         }
1286
1287         if (attr_mask & IB_QP_PATH_MTU)
1288                 return check_mtu_validate(hr_dev, hr_qp, attr, attr_mask);
1289
1290         return 0;
1291 }
1292
1293 int hns_roce_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1294                        int attr_mask, struct ib_udata *udata)
1295 {
1296         struct hns_roce_dev *hr_dev = to_hr_dev(ibqp->device);
1297         struct hns_roce_qp *hr_qp = to_hr_qp(ibqp);
1298         enum ib_qp_state cur_state, new_state;
1299         int ret = -EINVAL;
1300
1301         mutex_lock(&hr_qp->mutex);
1302
1303         if (attr_mask & IB_QP_CUR_STATE && attr->cur_qp_state != hr_qp->state)
1304                 goto out;
1305
1306         cur_state = hr_qp->state;
1307         new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state;
1308
1309         if (ibqp->uobject &&
1310             (attr_mask & IB_QP_STATE) && new_state == IB_QPS_ERR) {
1311                 if (hr_qp->en_flags & HNS_ROCE_QP_CAP_SQ_RECORD_DB) {
1312                         hr_qp->sq.head = *(int *)(hr_qp->sdb.virt_addr);
1313
1314                         if (hr_qp->en_flags & HNS_ROCE_QP_CAP_RQ_RECORD_DB)
1315                                 hr_qp->rq.head = *(int *)(hr_qp->rdb.virt_addr);
1316                 } else {
1317                         ibdev_warn(&hr_dev->ib_dev,
1318                                   "flush cqe is not supported in userspace!\n");
1319                         goto out;
1320                 }
1321         }
1322
1323         if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type,
1324                                 attr_mask)) {
1325                 ibdev_err(&hr_dev->ib_dev, "ib_modify_qp_is_ok failed\n");
1326                 goto out;
1327         }
1328
1329         ret = hns_roce_check_qp_attr(ibqp, attr, attr_mask);
1330         if (ret)
1331                 goto out;
1332
1333         if (cur_state == new_state && cur_state == IB_QPS_RESET)
1334                 goto out;
1335
1336         ret = hr_dev->hw->modify_qp(ibqp, attr, attr_mask, cur_state,
1337                                     new_state);
1338
1339 out:
1340         mutex_unlock(&hr_qp->mutex);
1341
1342         return ret;
1343 }
1344
1345 void hns_roce_lock_cqs(struct hns_roce_cq *send_cq, struct hns_roce_cq *recv_cq)
1346                        __acquires(&send_cq->lock) __acquires(&recv_cq->lock)
1347 {
1348         if (unlikely(send_cq == NULL && recv_cq == NULL)) {
1349                 __acquire(&send_cq->lock);
1350                 __acquire(&recv_cq->lock);
1351         } else if (unlikely(send_cq != NULL && recv_cq == NULL)) {
1352                 spin_lock_irq(&send_cq->lock);
1353                 __acquire(&recv_cq->lock);
1354         } else if (unlikely(send_cq == NULL && recv_cq != NULL)) {
1355                 spin_lock_irq(&recv_cq->lock);
1356                 __acquire(&send_cq->lock);
1357         } else if (send_cq == recv_cq) {
1358                 spin_lock_irq(&send_cq->lock);
1359                 __acquire(&recv_cq->lock);
1360         } else if (send_cq->cqn < recv_cq->cqn) {
1361                 spin_lock_irq(&send_cq->lock);
1362                 spin_lock_nested(&recv_cq->lock, SINGLE_DEPTH_NESTING);
1363         } else {
1364                 spin_lock_irq(&recv_cq->lock);
1365                 spin_lock_nested(&send_cq->lock, SINGLE_DEPTH_NESTING);
1366         }
1367 }
1368
1369 void hns_roce_unlock_cqs(struct hns_roce_cq *send_cq,
1370                          struct hns_roce_cq *recv_cq) __releases(&send_cq->lock)
1371                          __releases(&recv_cq->lock)
1372 {
1373         if (unlikely(send_cq == NULL && recv_cq == NULL)) {
1374                 __release(&recv_cq->lock);
1375                 __release(&send_cq->lock);
1376         } else if (unlikely(send_cq != NULL && recv_cq == NULL)) {
1377                 __release(&recv_cq->lock);
1378                 spin_unlock(&send_cq->lock);
1379         } else if (unlikely(send_cq == NULL && recv_cq != NULL)) {
1380                 __release(&send_cq->lock);
1381                 spin_unlock(&recv_cq->lock);
1382         } else if (send_cq == recv_cq) {
1383                 __release(&recv_cq->lock);
1384                 spin_unlock_irq(&send_cq->lock);
1385         } else if (send_cq->cqn < recv_cq->cqn) {
1386                 spin_unlock(&recv_cq->lock);
1387                 spin_unlock_irq(&send_cq->lock);
1388         } else {
1389                 spin_unlock(&send_cq->lock);
1390                 spin_unlock_irq(&recv_cq->lock);
1391         }
1392 }
1393
1394 static inline void *get_wqe(struct hns_roce_qp *hr_qp, int offset)
1395 {
1396         return hns_roce_buf_offset(hr_qp->mtr.kmem, offset);
1397 }
1398
1399 void *hns_roce_get_recv_wqe(struct hns_roce_qp *hr_qp, unsigned int n)
1400 {
1401         return get_wqe(hr_qp, hr_qp->rq.offset + (n << hr_qp->rq.wqe_shift));
1402 }
1403
1404 void *hns_roce_get_send_wqe(struct hns_roce_qp *hr_qp, unsigned int n)
1405 {
1406         return get_wqe(hr_qp, hr_qp->sq.offset + (n << hr_qp->sq.wqe_shift));
1407 }
1408
1409 void *hns_roce_get_extend_sge(struct hns_roce_qp *hr_qp, unsigned int n)
1410 {
1411         return get_wqe(hr_qp, hr_qp->sge.offset + (n << hr_qp->sge.sge_shift));
1412 }
1413
1414 bool hns_roce_wq_overflow(struct hns_roce_wq *hr_wq, u32 nreq,
1415                           struct ib_cq *ib_cq)
1416 {
1417         struct hns_roce_cq *hr_cq;
1418         u32 cur;
1419
1420         cur = hr_wq->head - hr_wq->tail;
1421         if (likely(cur + nreq < hr_wq->wqe_cnt))
1422                 return false;
1423
1424         hr_cq = to_hr_cq(ib_cq);
1425         spin_lock(&hr_cq->lock);
1426         cur = hr_wq->head - hr_wq->tail;
1427         spin_unlock(&hr_cq->lock);
1428
1429         return cur + nreq >= hr_wq->wqe_cnt;
1430 }
1431
1432 int hns_roce_init_qp_table(struct hns_roce_dev *hr_dev)
1433 {
1434         struct hns_roce_qp_table *qp_table = &hr_dev->qp_table;
1435         unsigned int reserved_from_bot;
1436         unsigned int i;
1437
1438         qp_table->idx_table.spare_idx = kcalloc(hr_dev->caps.num_qps,
1439                                         sizeof(u32), GFP_KERNEL);
1440         if (!qp_table->idx_table.spare_idx)
1441                 return -ENOMEM;
1442
1443         mutex_init(&qp_table->scc_mutex);
1444         mutex_init(&qp_table->bank_mutex);
1445         xa_init(&hr_dev->qp_table_xa);
1446
1447         reserved_from_bot = hr_dev->caps.reserved_qps;
1448
1449         for (i = 0; i < reserved_from_bot; i++) {
1450                 hr_dev->qp_table.bank[get_qp_bankid(i)].inuse++;
1451                 hr_dev->qp_table.bank[get_qp_bankid(i)].min++;
1452         }
1453
1454         for (i = 0; i < HNS_ROCE_QP_BANK_NUM; i++) {
1455                 ida_init(&hr_dev->qp_table.bank[i].ida);
1456                 hr_dev->qp_table.bank[i].max = hr_dev->caps.num_qps /
1457                                                HNS_ROCE_QP_BANK_NUM - 1;
1458                 hr_dev->qp_table.bank[i].next = hr_dev->qp_table.bank[i].min;
1459         }
1460
1461         return 0;
1462 }
1463
1464 void hns_roce_cleanup_qp_table(struct hns_roce_dev *hr_dev)
1465 {
1466         int i;
1467
1468         for (i = 0; i < HNS_ROCE_QP_BANK_NUM; i++)
1469                 ida_destroy(&hr_dev->qp_table.bank[i].ida);
1470         kfree(hr_dev->qp_table.idx_table.spare_idx);
1471 }