hw/usnic/usnic_ib_verbs.c

   1 /*
   2  * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  *
  32  */
  33 #include <linux/init.h>
  34 #include <linux/slab.h>
  35 #include <linux/errno.h>
  36
  37 #include <rdma/ib_user_verbs.h>
  38 #include <rdma/ib_addr.h>
  39 #include <rdma/uverbs_ioctl.h>
  40
  41 #include "usnic_abi.h"
  42 #include "usnic_ib.h"
  43 #include "usnic_common_util.h"
  44 #include "usnic_ib_qp_grp.h"
  45 #include "usnic_ib_verbs.h"
  46 #include "usnic_fwd.h"
  47 #include "usnic_log.h"
  48 #include "usnic_uiom.h"
  49 #include "usnic_transport.h"
  50
  51 #define USNIC_DEFAULT_TRANSPORT USNIC_TRANSPORT_ROCE_CUSTOM
  52
  53 const struct usnic_vnic_res_spec min_transport_spec[USNIC_TRANSPORT_MAX] = {
  54         { /*USNIC_TRANSPORT_UNKNOWN*/
  55                 .resources = {
  56                         {.type = USNIC_VNIC_RES_TYPE_EOL,       .cnt = 0,},
  57                 },
  58         },
  59         { /*USNIC_TRANSPORT_ROCE_CUSTOM*/
  60                 .resources = {
  61                         {.type = USNIC_VNIC_RES_TYPE_WQ,        .cnt = 1,},
  62                         {.type = USNIC_VNIC_RES_TYPE_RQ,        .cnt = 1,},
  63                         {.type = USNIC_VNIC_RES_TYPE_CQ,        .cnt = 1,},
  64                         {.type = USNIC_VNIC_RES_TYPE_EOL,       .cnt = 0,},
  65                 },
  66         },
  67         { /*USNIC_TRANSPORT_IPV4_UDP*/
  68                 .resources = {
  69                         {.type = USNIC_VNIC_RES_TYPE_WQ,        .cnt = 1,},
  70                         {.type = USNIC_VNIC_RES_TYPE_RQ,        .cnt = 1,},
  71                         {.type = USNIC_VNIC_RES_TYPE_CQ,        .cnt = 1,},
  72                         {.type = USNIC_VNIC_RES_TYPE_EOL,       .cnt = 0,},
  73                 },
  74         },
  75 };
  76
  77 static void usnic_ib_fw_string_to_u64(char *fw_ver_str, u64 *fw_ver)
  78 {
  79         *fw_ver = *((u64 *)fw_ver_str);
  80 }
  81
  82 static int usnic_ib_fill_create_qp_resp(struct usnic_ib_qp_grp *qp_grp,
  83                                         struct ib_udata *udata)
  84 {
  85         struct usnic_ib_dev *us_ibdev;
  86         struct usnic_ib_create_qp_resp resp;
  87         struct pci_dev *pdev;
  88         struct vnic_dev_bar *bar;
  89         struct usnic_vnic_res_chunk *chunk;
  90         struct usnic_ib_qp_grp_flow *default_flow;
  91         int i, err;
  92
  93         memset(&resp, 0, sizeof(resp));
  94
  95         us_ibdev = qp_grp->vf->pf;
  96         pdev = usnic_vnic_get_pdev(qp_grp->vf->vnic);
  97         if (!pdev) {
  98                 usnic_err("Failed to get pdev of qp_grp %d\n",
  99                                 qp_grp->grp_id);
 100                 return -EFAULT;
 101         }
 102
 103         bar = usnic_vnic_get_bar(qp_grp->vf->vnic, 0);
 104         if (!bar) {
 105                 usnic_err("Failed to get bar0 of qp_grp %d vf %s",
 106                                 qp_grp->grp_id, pci_name(pdev));
 107                 return -EFAULT;
 108         }
 109
 110         resp.vfid = usnic_vnic_get_index(qp_grp->vf->vnic);
 111         resp.bar_bus_addr = bar->bus_addr;
 112         resp.bar_len = bar->len;
 113
 114         chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_RQ);
 115         if (IS_ERR(chunk)) {
 116                 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
 117                         usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_RQ),
 118                         qp_grp->grp_id,
 119                         PTR_ERR(chunk));
 120                 return PTR_ERR(chunk);
 121         }
 122
 123         WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_RQ);
 124         resp.rq_cnt = chunk->cnt;
 125         for (i = 0; i < chunk->cnt; i++)
 126                 resp.rq_idx[i] = chunk->res[i]->vnic_idx;
 127
 128         chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_WQ);
 129         if (IS_ERR(chunk)) {
 130                 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
 131                         usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_WQ),
 132                         qp_grp->grp_id,
 133                         PTR_ERR(chunk));
 134                 return PTR_ERR(chunk);
 135         }
 136
 137         WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_WQ);
 138         resp.wq_cnt = chunk->cnt;
 139         for (i = 0; i < chunk->cnt; i++)
 140                 resp.wq_idx[i] = chunk->res[i]->vnic_idx;
 141
 142         chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_CQ);
 143         if (IS_ERR(chunk)) {
 144                 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
 145                         usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_CQ),
 146                         qp_grp->grp_id,
 147                         PTR_ERR(chunk));
 148                 return PTR_ERR(chunk);
 149         }
 150
 151         WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_CQ);
 152         resp.cq_cnt = chunk->cnt;
 153         for (i = 0; i < chunk->cnt; i++)
 154                 resp.cq_idx[i] = chunk->res[i]->vnic_idx;
 155
 156         default_flow = list_first_entry(&qp_grp->flows_lst,
 157                                         struct usnic_ib_qp_grp_flow, link);
 158         resp.transport = default_flow->trans_type;
 159
 160         err = ib_copy_to_udata(udata, &resp, sizeof(resp));
 161         if (err) {
 162                 usnic_err("Failed to copy udata for %s",
 163                           dev_name(&us_ibdev->ib_dev.dev));
 164                 return err;
 165         }
 166
 167         return 0;
 168 }
 169
 170 static int
 171 find_free_vf_and_create_qp_grp(struct ib_qp *qp,
 172                                struct usnic_transport_spec *trans_spec,
 173                                struct usnic_vnic_res_spec *res_spec)
 174 {
 175         struct usnic_ib_dev *us_ibdev = to_usdev(qp->device);
 176         struct usnic_ib_pd *pd = to_upd(qp->pd);
 177         struct usnic_ib_vf *vf;
 178         struct usnic_vnic *vnic;
 179         struct usnic_ib_qp_grp *qp_grp = to_uqp_grp(qp);
 180         struct device *dev, **dev_list;
 181         int i, ret;
 182
 183         BUG_ON(!mutex_is_locked(&us_ibdev->usdev_lock));
 184
 185         if (list_empty(&us_ibdev->vf_dev_list)) {
 186                 usnic_info("No vfs to allocate\n");
 187                 return -ENOMEM;
 188         }
 189
 190         if (usnic_ib_share_vf) {
 191                 /* Try to find resouces on a used vf which is in pd */
 192                 dev_list = usnic_uiom_get_dev_list(pd->umem_pd);
 193                 if (IS_ERR(dev_list))
 194                         return PTR_ERR(dev_list);
 195                 for (i = 0; dev_list[i]; i++) {
 196                         dev = dev_list[i];
 197                         vf = dev_get_drvdata(dev);
 198                         mutex_lock(&vf->lock);
 199                         vnic = vf->vnic;
 200                         if (!usnic_vnic_check_room(vnic, res_spec)) {
 201                                 usnic_dbg("Found used vnic %s from %s\n",
 202                                                 dev_name(&us_ibdev->ib_dev.dev),
 203                                                 pci_name(usnic_vnic_get_pdev(
 204                                                                         vnic)));
 205                                 ret = usnic_ib_qp_grp_create(qp_grp,
 206                                                              us_ibdev->ufdev,
 207                                                              vf, pd, res_spec,
 208                                                              trans_spec);
 209
 210                                 mutex_unlock(&vf->lock);
 211                                 goto qp_grp_check;
 212                         }
 213                         mutex_unlock(&vf->lock);
 214
 215                 }
 216                 usnic_uiom_free_dev_list(dev_list);
 217                 dev_list = NULL;
 218         }
 219
 220         /* Try to find resources on an unused vf */
 221         list_for_each_entry(vf, &us_ibdev->vf_dev_list, link) {
 222                 mutex_lock(&vf->lock);
 223                 vnic = vf->vnic;
 224                 if (vf->qp_grp_ref_cnt == 0 &&
 225                     usnic_vnic_check_room(vnic, res_spec) == 0) {
 226                         ret = usnic_ib_qp_grp_create(qp_grp, us_ibdev->ufdev,
 227                                                      vf, pd, res_spec,
 228                                                      trans_spec);
 229
 230                         mutex_unlock(&vf->lock);
 231                         goto qp_grp_check;
 232                 }
 233                 mutex_unlock(&vf->lock);
 234         }
 235
 236         usnic_info("No free qp grp found on %s\n",
 237                    dev_name(&us_ibdev->ib_dev.dev));
 238         return -ENOMEM;
 239
 240 qp_grp_check:
 241         if (ret) {
 242                 usnic_err("Failed to allocate qp_grp\n");
 243                 if (usnic_ib_share_vf)
 244                         usnic_uiom_free_dev_list(dev_list);
 245         }
 246         return ret;
 247 }
 248
 249 static void qp_grp_destroy(struct usnic_ib_qp_grp *qp_grp)
 250 {
 251         struct usnic_ib_vf *vf = qp_grp->vf;
 252
 253         WARN_ON(qp_grp->state != IB_QPS_RESET);
 254
 255         mutex_lock(&vf->lock);
 256         usnic_ib_qp_grp_destroy(qp_grp);
 257         mutex_unlock(&vf->lock);
 258 }
 259
 260 static int create_qp_validate_user_data(struct usnic_ib_create_qp_cmd cmd)
 261 {
 262         if (cmd.spec.trans_type <= USNIC_TRANSPORT_UNKNOWN ||
 263                         cmd.spec.trans_type >= USNIC_TRANSPORT_MAX)
 264                 return -EINVAL;
 265
 266         return 0;
 267 }
 268
 269 /* Start of ib callback functions */
 270
 271 enum rdma_link_layer usnic_ib_port_link_layer(struct ib_device *device,
 272                                               u32 port_num)
 273 {
 274         return IB_LINK_LAYER_ETHERNET;
 275 }
 276
 277 int usnic_ib_query_device(struct ib_device *ibdev,
 278                           struct ib_device_attr *props,
 279                           struct ib_udata *uhw)
 280 {
 281         struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
 282         union ib_gid gid;
 283         struct ethtool_drvinfo info;
 284         int qp_per_vf;
 285
 286         usnic_dbg("\n");
 287         if (uhw->inlen || uhw->outlen)
 288                 return -EINVAL;
 289
 290         mutex_lock(&us_ibdev->usdev_lock);
 291         us_ibdev->netdev->ethtool_ops->get_drvinfo(us_ibdev->netdev, &info);
 292         memset(props, 0, sizeof(*props));
 293         usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr,
 294                         &gid.raw[0]);
 295         memcpy(&props->sys_image_guid, &gid.global.interface_id,
 296                 sizeof(gid.global.interface_id));
 297         usnic_ib_fw_string_to_u64(&info.fw_version[0], &props->fw_ver);
 298         props->max_mr_size = USNIC_UIOM_MAX_MR_SIZE;
 299         props->page_size_cap = USNIC_UIOM_PAGE_SIZE;
 300         props->vendor_id = PCI_VENDOR_ID_CISCO;
 301         props->vendor_part_id = PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC;
 302         props->hw_ver = us_ibdev->pdev->subsystem_device;
 303         qp_per_vf = max(us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_WQ],
 304                         us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_RQ]);
 305         props->max_qp = qp_per_vf *
 306                 kref_read(&us_ibdev->vf_cnt);
 307         props->device_cap_flags = IB_DEVICE_PORT_ACTIVE_EVENT |
 308                 IB_DEVICE_SYS_IMAGE_GUID;
 309         props->kernel_cap_flags = IBK_BLOCK_MULTICAST_LOOPBACK;
 310         props->max_cq = us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_CQ] *
 311                 kref_read(&us_ibdev->vf_cnt);
 312         props->max_pd = USNIC_UIOM_MAX_PD_CNT;
 313         props->max_mr = USNIC_UIOM_MAX_MR_CNT;
 314         props->local_ca_ack_delay = 0;
 315         props->max_pkeys = 0;
 316         props->atomic_cap = IB_ATOMIC_NONE;
 317         props->masked_atomic_cap = props->atomic_cap;
 318         props->max_qp_rd_atom = 0;
 319         props->max_qp_init_rd_atom = 0;
 320         props->max_res_rd_atom = 0;
 321         props->max_srq = 0;
 322         props->max_srq_wr = 0;
 323         props->max_srq_sge = 0;
 324         props->max_fast_reg_page_list_len = 0;
 325         props->max_mcast_grp = 0;
 326         props->max_mcast_qp_attach = 0;
 327         props->max_total_mcast_qp_attach = 0;
 328         /* Owned by Userspace
 329          * max_qp_wr, max_sge, max_sge_rd, max_cqe */
 330         mutex_unlock(&us_ibdev->usdev_lock);
 331
 332         return 0;
 333 }
 334
 335 int usnic_ib_query_port(struct ib_device *ibdev, u32 port,
 336                                 struct ib_port_attr *props)
 337 {
 338         struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
 339
 340         usnic_dbg("\n");
 341
 342         if (ib_get_eth_speed(ibdev, port, &props->active_speed,
 343                              &props->active_width))
 344                 return -EINVAL;
 345
 346         /*
 347          * usdev_lock is acquired after (and not before) ib_get_eth_speed call
 348          * because acquiring rtnl_lock in ib_get_eth_speed, while holding
 349          * usdev_lock could lead to a deadlock.
 350          */
 351         mutex_lock(&us_ibdev->usdev_lock);
 352         /* props being zeroed by the caller, avoid zeroing it here */
 353
 354         props->lid = 0;
 355         props->lmc = 1;
 356         props->sm_lid = 0;
 357         props->sm_sl = 0;
 358
 359         if (!us_ibdev->ufdev->link_up) {
 360                 props->state = IB_PORT_DOWN;
 361                 props->phys_state = IB_PORT_PHYS_STATE_DISABLED;
 362         } else if (!us_ibdev->ufdev->inaddr) {
 363                 props->state = IB_PORT_INIT;
 364                 props->phys_state =
 365                         IB_PORT_PHYS_STATE_PORT_CONFIGURATION_TRAINING;
 366         } else {
 367                 props->state = IB_PORT_ACTIVE;
 368                 props->phys_state = IB_PORT_PHYS_STATE_LINK_UP;
 369         }
 370
 371         props->port_cap_flags = 0;
 372         props->gid_tbl_len = 1;
 373         props->bad_pkey_cntr = 0;
 374         props->qkey_viol_cntr = 0;
 375         props->max_mtu = IB_MTU_4096;
 376         props->active_mtu = iboe_get_mtu(us_ibdev->ufdev->mtu);
 377         /* Userspace will adjust for hdrs */
 378         props->max_msg_sz = us_ibdev->ufdev->mtu;
 379         props->max_vl_num = 1;
 380         mutex_unlock(&us_ibdev->usdev_lock);
 381
 382         return 0;
 383 }
 384
 385 int usnic_ib_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
 386                                 int qp_attr_mask,
 387                                 struct ib_qp_init_attr *qp_init_attr)
 388 {
 389         struct usnic_ib_qp_grp *qp_grp;
 390         struct usnic_ib_vf *vf;
 391         int err;
 392
 393         usnic_dbg("\n");
 394
 395         memset(qp_attr, 0, sizeof(*qp_attr));
 396         memset(qp_init_attr, 0, sizeof(*qp_init_attr));
 397
 398         qp_grp = to_uqp_grp(qp);
 399         vf = qp_grp->vf;
 400         mutex_lock(&vf->pf->usdev_lock);
 401         usnic_dbg("\n");
 402         qp_attr->qp_state = qp_grp->state;
 403         qp_attr->cur_qp_state = qp_grp->state;
 404
 405         switch (qp_grp->ibqp.qp_type) {
 406         case IB_QPT_UD:
 407                 qp_attr->qkey = 0;
 408                 break;
 409         default:
 410                 usnic_err("Unexpected qp_type %d\n", qp_grp->ibqp.qp_type);
 411                 err = -EINVAL;
 412                 goto err_out;
 413         }
 414
 415         mutex_unlock(&vf->pf->usdev_lock);
 416         return 0;
 417
 418 err_out:
 419         mutex_unlock(&vf->pf->usdev_lock);
 420         return err;
 421 }
 422
 423 int usnic_ib_query_gid(struct ib_device *ibdev, u32 port, int index,
 424                                 union ib_gid *gid)
 425 {
 426
 427         struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
 428         usnic_dbg("\n");
 429
 430         if (index > 1)
 431                 return -EINVAL;
 432
 433         mutex_lock(&us_ibdev->usdev_lock);
 434         memset(&(gid->raw[0]), 0, sizeof(gid->raw));
 435         usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr,
 436                         &gid->raw[0]);
 437         mutex_unlock(&us_ibdev->usdev_lock);
 438
 439         return 0;
 440 }
 441
 442 int usnic_ib_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
 443 {
 444         struct usnic_ib_pd *pd = to_upd(ibpd);
 445
 446         pd->umem_pd = usnic_uiom_alloc_pd(ibpd->device->dev.parent);
 447         if (IS_ERR(pd->umem_pd))
 448                 return PTR_ERR(pd->umem_pd);
 449
 450         return 0;
 451 }
 452
 453 int usnic_ib_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata)
 454 {
 455         usnic_uiom_dealloc_pd((to_upd(pd))->umem_pd);
 456         return 0;
 457 }
 458
 459 int usnic_ib_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *init_attr,
 460                        struct ib_udata *udata)
 461 {
 462         int err;
 463         struct usnic_ib_dev *us_ibdev;
 464         struct usnic_ib_qp_grp *qp_grp = to_uqp_grp(ibqp);
 465         struct usnic_ib_ucontext *ucontext = rdma_udata_to_drv_context(
 466                 udata, struct usnic_ib_ucontext, ibucontext);
 467         int cq_cnt;
 468         struct usnic_vnic_res_spec res_spec;
 469         struct usnic_ib_create_qp_cmd cmd;
 470         struct usnic_transport_spec trans_spec;
 471
 472         usnic_dbg("\n");
 473
 474         us_ibdev = to_usdev(ibqp->device);
 475
 476         if (init_attr->create_flags)
 477                 return -EOPNOTSUPP;
 478
 479         err = ib_copy_from_udata(&cmd, udata, sizeof(cmd));
 480         if (err) {
 481                 usnic_err("%s: cannot copy udata for create_qp\n",
 482                           dev_name(&us_ibdev->ib_dev.dev));
 483                 return -EINVAL;
 484         }
 485
 486         err = create_qp_validate_user_data(cmd);
 487         if (err) {
 488                 usnic_err("%s: Failed to validate user data\n",
 489                           dev_name(&us_ibdev->ib_dev.dev));
 490                 return -EINVAL;
 491         }
 492
 493         if (init_attr->qp_type != IB_QPT_UD) {
 494                 usnic_err("%s asked to make a non-UD QP: %d\n",
 495                           dev_name(&us_ibdev->ib_dev.dev), init_attr->qp_type);
 496                 return -EOPNOTSUPP;
 497         }
 498
 499         trans_spec = cmd.spec;
 500         mutex_lock(&us_ibdev->usdev_lock);
 501         cq_cnt = (init_attr->send_cq == init_attr->recv_cq) ? 1 : 2;
 502         res_spec = min_transport_spec[trans_spec.trans_type];
 503         usnic_vnic_res_spec_update(&res_spec, USNIC_VNIC_RES_TYPE_CQ, cq_cnt);
 504         err = find_free_vf_and_create_qp_grp(ibqp, &trans_spec, &res_spec);
 505         if (err)
 506                 goto out_release_mutex;
 507
 508         err = usnic_ib_fill_create_qp_resp(qp_grp, udata);
 509         if (err) {
 510                 err = -EBUSY;
 511                 goto out_release_qp_grp;
 512         }
 513
 514         qp_grp->ctx = ucontext;
 515         list_add_tail(&qp_grp->link, &ucontext->qp_grp_list);
 516         usnic_ib_log_vf(qp_grp->vf);
 517         mutex_unlock(&us_ibdev->usdev_lock);
 518         return 0;
 519
 520 out_release_qp_grp:
 521         qp_grp_destroy(qp_grp);
 522 out_release_mutex:
 523         mutex_unlock(&us_ibdev->usdev_lock);
 524         return err;
 525 }
 526
 527 int usnic_ib_destroy_qp(struct ib_qp *qp, struct ib_udata *udata)
 528 {
 529         struct usnic_ib_qp_grp *qp_grp;
 530         struct usnic_ib_vf *vf;
 531
 532         usnic_dbg("\n");
 533
 534         qp_grp = to_uqp_grp(qp);
 535         vf = qp_grp->vf;
 536         mutex_lock(&vf->pf->usdev_lock);
 537         if (usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RESET, NULL)) {
 538                 usnic_err("Failed to move qp grp %u to reset\n",
 539                                 qp_grp->grp_id);
 540         }
 541
 542         list_del(&qp_grp->link);
 543         qp_grp_destroy(qp_grp);
 544         mutex_unlock(&vf->pf->usdev_lock);
 545
 546         return 0;
 547 }
 548
 549 int usnic_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
 550                                 int attr_mask, struct ib_udata *udata)
 551 {
 552         struct usnic_ib_qp_grp *qp_grp;
 553         int status;
 554         usnic_dbg("\n");
 555
 556         if (attr_mask & ~IB_QP_ATTR_STANDARD_BITS)
 557                 return -EOPNOTSUPP;
 558
 559         qp_grp = to_uqp_grp(ibqp);
 560
 561         mutex_lock(&qp_grp->vf->pf->usdev_lock);
 562         if ((attr_mask & IB_QP_PORT) && attr->port_num != 1) {
 563                 /* usnic devices only have one port */
 564                 status = -EINVAL;
 565                 goto out_unlock;
 566         }
 567         if (attr_mask & IB_QP_STATE) {
 568                 status = usnic_ib_qp_grp_modify(qp_grp, attr->qp_state, NULL);
 569         } else {
 570                 usnic_err("Unhandled request, attr_mask=0x%x\n", attr_mask);
 571                 status = -EINVAL;
 572         }
 573
 574 out_unlock:
 575         mutex_unlock(&qp_grp->vf->pf->usdev_lock);
 576         return status;
 577 }
 578
 579 int usnic_ib_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
 580                        struct ib_udata *udata)
 581 {
 582         if (attr->flags)
 583                 return -EOPNOTSUPP;
 584
 585         return 0;
 586 }
 587
 588 int usnic_ib_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)
 589 {
 590         return 0;
 591 }
 592
 593 struct ib_mr *usnic_ib_reg_mr(struct ib_pd *pd, u64 start, u64 length,
 594                                         u64 virt_addr, int access_flags,
 595                                         struct ib_udata *udata)
 596 {
 597         struct usnic_ib_mr *mr;
 598         int err;
 599
 600         usnic_dbg("start 0x%llx va 0x%llx length 0x%llx\n", start,
 601                         virt_addr, length);
 602
 603         mr = kzalloc(sizeof(*mr), GFP_KERNEL);
 604         if (!mr)
 605                 return ERR_PTR(-ENOMEM);
 606
 607         mr->umem = usnic_uiom_reg_get(to_upd(pd)->umem_pd, start, length,
 608                                         access_flags, 0);
 609         if (IS_ERR_OR_NULL(mr->umem)) {
 610                 err = mr->umem ? PTR_ERR(mr->umem) : -EFAULT;
 611                 goto err_free;
 612         }
 613
 614         mr->ibmr.lkey = mr->ibmr.rkey = 0;
 615         return &mr->ibmr;
 616
 617 err_free:
 618         kfree(mr);
 619         return ERR_PTR(err);
 620 }
 621
 622 int usnic_ib_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
 623 {
 624         struct usnic_ib_mr *mr = to_umr(ibmr);
 625
 626         usnic_dbg("va 0x%lx length 0x%zx\n", mr->umem->va, mr->umem->length);
 627
 628         usnic_uiom_reg_release(mr->umem);
 629         kfree(mr);
 630         return 0;
 631 }
 632
 633 int usnic_ib_alloc_ucontext(struct ib_ucontext *uctx, struct ib_udata *udata)
 634 {
 635         struct ib_device *ibdev = uctx->device;
 636         struct usnic_ib_ucontext *context = to_ucontext(uctx);
 637         struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
 638         usnic_dbg("\n");
 639
 640         INIT_LIST_HEAD(&context->qp_grp_list);
 641         mutex_lock(&us_ibdev->usdev_lock);
 642         list_add_tail(&context->link, &us_ibdev->ctx_list);
 643         mutex_unlock(&us_ibdev->usdev_lock);
 644
 645         return 0;
 646 }
 647
 648 void usnic_ib_dealloc_ucontext(struct ib_ucontext *ibcontext)
 649 {
 650         struct usnic_ib_ucontext *context = to_uucontext(ibcontext);
 651         struct usnic_ib_dev *us_ibdev = to_usdev(ibcontext->device);
 652         usnic_dbg("\n");
 653
 654         mutex_lock(&us_ibdev->usdev_lock);
 655         WARN_ON_ONCE(!list_empty(&context->qp_grp_list));
 656         list_del(&context->link);
 657         mutex_unlock(&us_ibdev->usdev_lock);
 658 }
 659
 660 int usnic_ib_mmap(struct ib_ucontext *context,
 661                                 struct vm_area_struct *vma)
 662 {
 663         struct usnic_ib_ucontext *uctx = to_ucontext(context);
 664         struct usnic_ib_dev *us_ibdev;
 665         struct usnic_ib_qp_grp *qp_grp;
 666         struct usnic_ib_vf *vf;
 667         struct vnic_dev_bar *bar;
 668         dma_addr_t bus_addr;
 669         unsigned int len;
 670         unsigned int vfid;
 671
 672         usnic_dbg("\n");
 673
 674         us_ibdev = to_usdev(context->device);
 675         vm_flags_set(vma, VM_IO);
 676         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 677         vfid = vma->vm_pgoff;
 678         usnic_dbg("Page Offset %lu PAGE_SHIFT %u VFID %u\n",
 679                         vma->vm_pgoff, PAGE_SHIFT, vfid);
 680
 681         mutex_lock(&us_ibdev->usdev_lock);
 682         list_for_each_entry(qp_grp, &uctx->qp_grp_list, link) {
 683                 vf = qp_grp->vf;
 684                 if (usnic_vnic_get_index(vf->vnic) == vfid) {
 685                         bar = usnic_vnic_get_bar(vf->vnic, 0);
 686                         if ((vma->vm_end - vma->vm_start) != bar->len) {
 687                                 usnic_err("Bar0 Len %lu - Request map %lu\n",
 688                                                 bar->len,
 689                                                 vma->vm_end - vma->vm_start);
 690                                 mutex_unlock(&us_ibdev->usdev_lock);
 691                                 return -EINVAL;
 692                         }
 693                         bus_addr = bar->bus_addr;
 694                         len = bar->len;
 695                         usnic_dbg("bus: %pa vaddr: %p size: %ld\n",
 696                                         &bus_addr, bar->vaddr, bar->len);
 697                         mutex_unlock(&us_ibdev->usdev_lock);
 698
 699                         return remap_pfn_range(vma,
 700                                                 vma->vm_start,
 701                                                 bus_addr >> PAGE_SHIFT,
 702                                                 len, vma->vm_page_prot);
 703                 }
 704         }
 705
 706         mutex_unlock(&us_ibdev->usdev_lock);
 707         usnic_err("No VF %u found\n", vfid);
 708         return -EINVAL;
 709 }