drivers/infiniband/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/module.h>
  34 #include <linux/init.h>
  35 #include <linux/slab.h>
  36 #include <linux/errno.h>
  37
  38 #include <rdma/ib_user_verbs.h>
  39 #include <rdma/ib_addr.h>
  40 #include <rdma/uverbs_ioctl.h>
  41
  42 #include "usnic_abi.h"
  43 #include "usnic_ib.h"
  44 #include "usnic_common_util.h"
  45 #include "usnic_ib_qp_grp.h"
  46 #include "usnic_ib_verbs.h"
  47 #include "usnic_fwd.h"
  48 #include "usnic_log.h"
  49 #include "usnic_uiom.h"
  50 #include "usnic_transport.h"
  51
  52 #define USNIC_DEFAULT_TRANSPORT USNIC_TRANSPORT_ROCE_CUSTOM
  53
  54 const struct usnic_vnic_res_spec min_transport_spec[USNIC_TRANSPORT_MAX] = {
  55         { /*USNIC_TRANSPORT_UNKNOWN*/
  56                 .resources = {
  57                         {.type = USNIC_VNIC_RES_TYPE_EOL,       .cnt = 0,},
  58                 },
  59         },
  60         { /*USNIC_TRANSPORT_ROCE_CUSTOM*/
  61                 .resources = {
  62                         {.type = USNIC_VNIC_RES_TYPE_WQ,        .cnt = 1,},
  63                         {.type = USNIC_VNIC_RES_TYPE_RQ,        .cnt = 1,},
  64                         {.type = USNIC_VNIC_RES_TYPE_CQ,        .cnt = 1,},
  65                         {.type = USNIC_VNIC_RES_TYPE_EOL,       .cnt = 0,},
  66                 },
  67         },
  68         { /*USNIC_TRANSPORT_IPV4_UDP*/
  69                 .resources = {
  70                         {.type = USNIC_VNIC_RES_TYPE_WQ,        .cnt = 1,},
  71                         {.type = USNIC_VNIC_RES_TYPE_RQ,        .cnt = 1,},
  72                         {.type = USNIC_VNIC_RES_TYPE_CQ,        .cnt = 1,},
  73                         {.type = USNIC_VNIC_RES_TYPE_EOL,       .cnt = 0,},
  74                 },
  75         },
  76 };
  77
  78 static void usnic_ib_fw_string_to_u64(char *fw_ver_str, u64 *fw_ver)
  79 {
  80         *fw_ver = *((u64 *)fw_ver_str);
  81 }
  82
  83 static int usnic_ib_fill_create_qp_resp(struct usnic_ib_qp_grp *qp_grp,
  84                                         struct ib_udata *udata)
  85 {
  86         struct usnic_ib_dev *us_ibdev;
  87         struct usnic_ib_create_qp_resp resp;
  88         struct pci_dev *pdev;
  89         struct vnic_dev_bar *bar;
  90         struct usnic_vnic_res_chunk *chunk;
  91         struct usnic_ib_qp_grp_flow *default_flow;
  92         int i, err;
  93
  94         memset(&resp, 0, sizeof(resp));
  95
  96         us_ibdev = qp_grp->vf->pf;
  97         pdev = usnic_vnic_get_pdev(qp_grp->vf->vnic);
  98         if (!pdev) {
  99                 usnic_err("Failed to get pdev of qp_grp %d\n",
 100                                 qp_grp->grp_id);
 101                 return -EFAULT;
 102         }
 103
 104         bar = usnic_vnic_get_bar(qp_grp->vf->vnic, 0);
 105         if (!bar) {
 106                 usnic_err("Failed to get bar0 of qp_grp %d vf %s",
 107                                 qp_grp->grp_id, pci_name(pdev));
 108                 return -EFAULT;
 109         }
 110
 111         resp.vfid = usnic_vnic_get_index(qp_grp->vf->vnic);
 112         resp.bar_bus_addr = bar->bus_addr;
 113         resp.bar_len = bar->len;
 114
 115         chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_RQ);
 116         if (IS_ERR(chunk)) {
 117                 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
 118                         usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_RQ),
 119                         qp_grp->grp_id,
 120                         PTR_ERR(chunk));
 121                 return PTR_ERR(chunk);
 122         }
 123
 124         WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_RQ);
 125         resp.rq_cnt = chunk->cnt;
 126         for (i = 0; i < chunk->cnt; i++)
 127                 resp.rq_idx[i] = chunk->res[i]->vnic_idx;
 128
 129         chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_WQ);
 130         if (IS_ERR(chunk)) {
 131                 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
 132                         usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_WQ),
 133                         qp_grp->grp_id,
 134                         PTR_ERR(chunk));
 135                 return PTR_ERR(chunk);
 136         }
 137
 138         WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_WQ);
 139         resp.wq_cnt = chunk->cnt;
 140         for (i = 0; i < chunk->cnt; i++)
 141                 resp.wq_idx[i] = chunk->res[i]->vnic_idx;
 142
 143         chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_CQ);
 144         if (IS_ERR(chunk)) {
 145                 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
 146                         usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_CQ),
 147                         qp_grp->grp_id,
 148                         PTR_ERR(chunk));
 149                 return PTR_ERR(chunk);
 150         }
 151
 152         WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_CQ);
 153         resp.cq_cnt = chunk->cnt;
 154         for (i = 0; i < chunk->cnt; i++)
 155                 resp.cq_idx[i] = chunk->res[i]->vnic_idx;
 156
 157         default_flow = list_first_entry(&qp_grp->flows_lst,
 158                                         struct usnic_ib_qp_grp_flow, link);
 159         resp.transport = default_flow->trans_type;
 160
 161         err = ib_copy_to_udata(udata, &resp, sizeof(resp));
 162         if (err) {
 163                 usnic_err("Failed to copy udata for %s",
 164                           dev_name(&us_ibdev->ib_dev.dev));
 165                 return err;
 166         }
 167
 168         return 0;
 169 }
 170
 171 static struct usnic_ib_qp_grp*
 172 find_free_vf_and_create_qp_grp(struct usnic_ib_dev *us_ibdev,
 173                                 struct usnic_ib_pd *pd,
 174                                 struct usnic_transport_spec *trans_spec,
 175                                 struct usnic_vnic_res_spec *res_spec)
 176 {
 177         struct usnic_ib_vf *vf;
 178         struct usnic_vnic *vnic;
 179         struct usnic_ib_qp_grp *qp_grp;
 180         struct device *dev, **dev_list;
 181         int i;
 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 NULL;
 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 ERR_CAST(dev_list);
 195                 for (i = 0; dev_list[i]; i++) {
 196                         dev = dev_list[i];
 197                         vf = dev_get_drvdata(dev);
 198                         spin_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                                 qp_grp = usnic_ib_qp_grp_create(us_ibdev->ufdev,
 206                                                                 vf, pd,
 207                                                                 res_spec,
 208                                                                 trans_spec);
 209
 210                                 spin_unlock(&vf->lock);
 211                                 goto qp_grp_check;
 212                         }
 213                         spin_unlock(&vf->lock);
 214
 215                 }
 216                 usnic_uiom_free_dev_list(dev_list);
 217         }
 218
 219         /* Try to find resources on an unused vf */
 220         list_for_each_entry(vf, &us_ibdev->vf_dev_list, link) {
 221                 spin_lock(&vf->lock);
 222                 vnic = vf->vnic;
 223                 if (vf->qp_grp_ref_cnt == 0 &&
 224                     usnic_vnic_check_room(vnic, res_spec) == 0) {
 225                         qp_grp = usnic_ib_qp_grp_create(us_ibdev->ufdev, vf,
 226                                                         pd, res_spec,
 227                                                         trans_spec);
 228
 229                         spin_unlock(&vf->lock);
 230                         goto qp_grp_check;
 231                 }
 232                 spin_unlock(&vf->lock);
 233         }
 234
 235         usnic_info("No free qp grp found on %s\n",
 236                    dev_name(&us_ibdev->ib_dev.dev));
 237         return ERR_PTR(-ENOMEM);
 238
 239 qp_grp_check:
 240         if (IS_ERR_OR_NULL(qp_grp)) {
 241                 usnic_err("Failed to allocate qp_grp\n");
 242                 return ERR_PTR(qp_grp ? PTR_ERR(qp_grp) : -ENOMEM);
 243         }
 244         return qp_grp;
 245 }
 246
 247 static void qp_grp_destroy(struct usnic_ib_qp_grp *qp_grp)
 248 {
 249         struct usnic_ib_vf *vf = qp_grp->vf;
 250
 251         WARN_ON(qp_grp->state != IB_QPS_RESET);
 252
 253         spin_lock(&vf->lock);
 254         usnic_ib_qp_grp_destroy(qp_grp);
 255         spin_unlock(&vf->lock);
 256 }
 257
 258 static int create_qp_validate_user_data(struct usnic_ib_create_qp_cmd cmd)
 259 {
 260         if (cmd.spec.trans_type <= USNIC_TRANSPORT_UNKNOWN ||
 261                         cmd.spec.trans_type >= USNIC_TRANSPORT_MAX)
 262                 return -EINVAL;
 263
 264         return 0;
 265 }
 266
 267 /* Start of ib callback functions */
 268
 269 enum rdma_link_layer usnic_ib_port_link_layer(struct ib_device *device,
 270                                                 u8 port_num)
 271 {
 272         return IB_LINK_LAYER_ETHERNET;
 273 }
 274
 275 int usnic_ib_query_device(struct ib_device *ibdev,
 276                           struct ib_device_attr *props,
 277                           struct ib_udata *uhw)
 278 {
 279         struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
 280         union ib_gid gid;
 281         struct ethtool_drvinfo info;
 282         int qp_per_vf;
 283
 284         usnic_dbg("\n");
 285         if (uhw->inlen || uhw->outlen)
 286                 return -EINVAL;
 287
 288         mutex_lock(&us_ibdev->usdev_lock);
 289         us_ibdev->netdev->ethtool_ops->get_drvinfo(us_ibdev->netdev, &info);
 290         memset(props, 0, sizeof(*props));
 291         usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr,
 292                         &gid.raw[0]);
 293         memcpy(&props->sys_image_guid, &gid.global.interface_id,
 294                 sizeof(gid.global.interface_id));
 295         usnic_ib_fw_string_to_u64(&info.fw_version[0], &props->fw_ver);
 296         props->max_mr_size = USNIC_UIOM_MAX_MR_SIZE;
 297         props->page_size_cap = USNIC_UIOM_PAGE_SIZE;
 298         props->vendor_id = PCI_VENDOR_ID_CISCO;
 299         props->vendor_part_id = PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC;
 300         props->hw_ver = us_ibdev->pdev->subsystem_device;
 301         qp_per_vf = max(us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_WQ],
 302                         us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_RQ]);
 303         props->max_qp = qp_per_vf *
 304                 kref_read(&us_ibdev->vf_cnt);
 305         props->device_cap_flags = IB_DEVICE_PORT_ACTIVE_EVENT |
 306                 IB_DEVICE_SYS_IMAGE_GUID | IB_DEVICE_BLOCK_MULTICAST_LOOPBACK;
 307         props->max_cq = us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_CQ] *
 308                 kref_read(&us_ibdev->vf_cnt);
 309         props->max_pd = USNIC_UIOM_MAX_PD_CNT;
 310         props->max_mr = USNIC_UIOM_MAX_MR_CNT;
 311         props->local_ca_ack_delay = 0;
 312         props->max_pkeys = 0;
 313         props->atomic_cap = IB_ATOMIC_NONE;
 314         props->masked_atomic_cap = props->atomic_cap;
 315         props->max_qp_rd_atom = 0;
 316         props->max_qp_init_rd_atom = 0;
 317         props->max_res_rd_atom = 0;
 318         props->max_srq = 0;
 319         props->max_srq_wr = 0;
 320         props->max_srq_sge = 0;
 321         props->max_fast_reg_page_list_len = 0;
 322         props->max_mcast_grp = 0;
 323         props->max_mcast_qp_attach = 0;
 324         props->max_total_mcast_qp_attach = 0;
 325         props->max_map_per_fmr = 0;
 326         /* Owned by Userspace
 327          * max_qp_wr, max_sge, max_sge_rd, max_cqe */
 328         mutex_unlock(&us_ibdev->usdev_lock);
 329
 330         return 0;
 331 }
 332
 333 int usnic_ib_query_port(struct ib_device *ibdev, u8 port,
 334                                 struct ib_port_attr *props)
 335 {
 336         struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
 337
 338         usnic_dbg("\n");
 339
 340         if (ib_get_eth_speed(ibdev, port, &props->active_speed,
 341                              &props->active_width))
 342                 return -EINVAL;
 343
 344         /*
 345          * usdev_lock is acquired after (and not before) ib_get_eth_speed call
 346          * because acquiring rtnl_lock in ib_get_eth_speed, while holding
 347          * usdev_lock could lead to a deadlock.
 348          */
 349         mutex_lock(&us_ibdev->usdev_lock);
 350         /* props being zeroed by the caller, avoid zeroing it here */
 351
 352         props->lid = 0;
 353         props->lmc = 1;
 354         props->sm_lid = 0;
 355         props->sm_sl = 0;
 356
 357         if (!us_ibdev->ufdev->link_up) {
 358                 props->state = IB_PORT_DOWN;
 359                 props->phys_state = IB_PORT_PHYS_STATE_DISABLED;
 360         } else if (!us_ibdev->ufdev->inaddr) {
 361                 props->state = IB_PORT_INIT;
 362                 props->phys_state =
 363                         IB_PORT_PHYS_STATE_PORT_CONFIGURATION_TRAINING;
 364         } else {
 365                 props->state = IB_PORT_ACTIVE;
 366                 props->phys_state = IB_PORT_PHYS_STATE_LINK_UP;
 367         }
 368
 369         props->port_cap_flags = 0;
 370         props->gid_tbl_len = 1;
 371         props->pkey_tbl_len = 1;
 372         props->bad_pkey_cntr = 0;
 373         props->qkey_viol_cntr = 0;
 374         props->max_mtu = IB_MTU_4096;
 375         props->active_mtu = iboe_get_mtu(us_ibdev->ufdev->mtu);
 376         /* Userspace will adjust for hdrs */
 377         props->max_msg_sz = us_ibdev->ufdev->mtu;
 378         props->max_vl_num = 1;
 379         mutex_unlock(&us_ibdev->usdev_lock);
 380
 381         return 0;
 382 }
 383
 384 int usnic_ib_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
 385                                 int qp_attr_mask,
 386                                 struct ib_qp_init_attr *qp_init_attr)
 387 {
 388         struct usnic_ib_qp_grp *qp_grp;
 389         struct usnic_ib_vf *vf;
 390         int err;
 391
 392         usnic_dbg("\n");
 393
 394         memset(qp_attr, 0, sizeof(*qp_attr));
 395         memset(qp_init_attr, 0, sizeof(*qp_init_attr));
 396
 397         qp_grp = to_uqp_grp(qp);
 398         vf = qp_grp->vf;
 399         mutex_lock(&vf->pf->usdev_lock);
 400         usnic_dbg("\n");
 401         qp_attr->qp_state = qp_grp->state;
 402         qp_attr->cur_qp_state = qp_grp->state;
 403
 404         switch (qp_grp->ibqp.qp_type) {
 405         case IB_QPT_UD:
 406                 qp_attr->qkey = 0;
 407                 break;
 408         default:
 409                 usnic_err("Unexpected qp_type %d\n", qp_grp->ibqp.qp_type);
 410                 err = -EINVAL;
 411                 goto err_out;
 412         }
 413
 414         mutex_unlock(&vf->pf->usdev_lock);
 415         return 0;
 416
 417 err_out:
 418         mutex_unlock(&vf->pf->usdev_lock);
 419         return err;
 420 }
 421
 422 int usnic_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
 423                                 union ib_gid *gid)
 424 {
 425
 426         struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
 427         usnic_dbg("\n");
 428
 429         if (index > 1)
 430                 return -EINVAL;
 431
 432         mutex_lock(&us_ibdev->usdev_lock);
 433         memset(&(gid->raw[0]), 0, sizeof(gid->raw));
 434         usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr,
 435                         &gid->raw[0]);
 436         mutex_unlock(&us_ibdev->usdev_lock);
 437
 438         return 0;
 439 }
 440
 441 int usnic_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
 442                                 u16 *pkey)
 443 {
 444         if (index > 0)
 445                 return -EINVAL;
 446
 447         *pkey = 0xffff;
 448         return 0;
 449 }
 450
 451 int usnic_ib_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
 452 {
 453         struct usnic_ib_pd *pd = to_upd(ibpd);
 454         void *umem_pd;
 455
 456         umem_pd = pd->umem_pd = usnic_uiom_alloc_pd();
 457         if (IS_ERR_OR_NULL(umem_pd)) {
 458                 return umem_pd ? PTR_ERR(umem_pd) : -ENOMEM;
 459         }
 460
 461         return 0;
 462 }
 463
 464 void usnic_ib_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata)
 465 {
 466         usnic_uiom_dealloc_pd((to_upd(pd))->umem_pd);
 467 }
 468
 469 struct ib_qp *usnic_ib_create_qp(struct ib_pd *pd,
 470                                         struct ib_qp_init_attr *init_attr,
 471                                         struct ib_udata *udata)
 472 {
 473         int err;
 474         struct usnic_ib_dev *us_ibdev;
 475         struct usnic_ib_qp_grp *qp_grp;
 476         struct usnic_ib_ucontext *ucontext = rdma_udata_to_drv_context(
 477                 udata, struct usnic_ib_ucontext, ibucontext);
 478         int cq_cnt;
 479         struct usnic_vnic_res_spec res_spec;
 480         struct usnic_ib_create_qp_cmd cmd;
 481         struct usnic_transport_spec trans_spec;
 482
 483         usnic_dbg("\n");
 484
 485         us_ibdev = to_usdev(pd->device);
 486
 487         if (init_attr->create_flags)
 488                 return ERR_PTR(-EINVAL);
 489
 490         err = ib_copy_from_udata(&cmd, udata, sizeof(cmd));
 491         if (err) {
 492                 usnic_err("%s: cannot copy udata for create_qp\n",
 493                           dev_name(&us_ibdev->ib_dev.dev));
 494                 return ERR_PTR(-EINVAL);
 495         }
 496
 497         err = create_qp_validate_user_data(cmd);
 498         if (err) {
 499                 usnic_err("%s: Failed to validate user data\n",
 500                           dev_name(&us_ibdev->ib_dev.dev));
 501                 return ERR_PTR(-EINVAL);
 502         }
 503
 504         if (init_attr->qp_type != IB_QPT_UD) {
 505                 usnic_err("%s asked to make a non-UD QP: %d\n",
 506                           dev_name(&us_ibdev->ib_dev.dev), init_attr->qp_type);
 507                 return ERR_PTR(-EINVAL);
 508         }
 509
 510         trans_spec = cmd.spec;
 511         mutex_lock(&us_ibdev->usdev_lock);
 512         cq_cnt = (init_attr->send_cq == init_attr->recv_cq) ? 1 : 2;
 513         res_spec = min_transport_spec[trans_spec.trans_type];
 514         usnic_vnic_res_spec_update(&res_spec, USNIC_VNIC_RES_TYPE_CQ, cq_cnt);
 515         qp_grp = find_free_vf_and_create_qp_grp(us_ibdev, to_upd(pd),
 516                                                 &trans_spec,
 517                                                 &res_spec);
 518         if (IS_ERR_OR_NULL(qp_grp)) {
 519                 err = qp_grp ? PTR_ERR(qp_grp) : -ENOMEM;
 520                 goto out_release_mutex;
 521         }
 522
 523         err = usnic_ib_fill_create_qp_resp(qp_grp, udata);
 524         if (err) {
 525                 err = -EBUSY;
 526                 goto out_release_qp_grp;
 527         }
 528
 529         qp_grp->ctx = ucontext;
 530         list_add_tail(&qp_grp->link, &ucontext->qp_grp_list);
 531         usnic_ib_log_vf(qp_grp->vf);
 532         mutex_unlock(&us_ibdev->usdev_lock);
 533         return &qp_grp->ibqp;
 534
 535 out_release_qp_grp:
 536         qp_grp_destroy(qp_grp);
 537 out_release_mutex:
 538         mutex_unlock(&us_ibdev->usdev_lock);
 539         return ERR_PTR(err);
 540 }
 541
 542 int usnic_ib_destroy_qp(struct ib_qp *qp, struct ib_udata *udata)
 543 {
 544         struct usnic_ib_qp_grp *qp_grp;
 545         struct usnic_ib_vf *vf;
 546
 547         usnic_dbg("\n");
 548
 549         qp_grp = to_uqp_grp(qp);
 550         vf = qp_grp->vf;
 551         mutex_lock(&vf->pf->usdev_lock);
 552         if (usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RESET, NULL)) {
 553                 usnic_err("Failed to move qp grp %u to reset\n",
 554                                 qp_grp->grp_id);
 555         }
 556
 557         list_del(&qp_grp->link);
 558         qp_grp_destroy(qp_grp);
 559         mutex_unlock(&vf->pf->usdev_lock);
 560
 561         return 0;
 562 }
 563
 564 int usnic_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
 565                                 int attr_mask, struct ib_udata *udata)
 566 {
 567         struct usnic_ib_qp_grp *qp_grp;
 568         int status;
 569         usnic_dbg("\n");
 570
 571         qp_grp = to_uqp_grp(ibqp);
 572
 573         mutex_lock(&qp_grp->vf->pf->usdev_lock);
 574         if ((attr_mask & IB_QP_PORT) && attr->port_num != 1) {
 575                 /* usnic devices only have one port */
 576                 status = -EINVAL;
 577                 goto out_unlock;
 578         }
 579         if (attr_mask & IB_QP_STATE) {
 580                 status = usnic_ib_qp_grp_modify(qp_grp, attr->qp_state, NULL);
 581         } else {
 582                 usnic_err("Unhandled request, attr_mask=0x%x\n", attr_mask);
 583                 status = -EINVAL;
 584         }
 585
 586 out_unlock:
 587         mutex_unlock(&qp_grp->vf->pf->usdev_lock);
 588         return status;
 589 }
 590
 591 int usnic_ib_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
 592                        struct ib_udata *udata)
 593 {
 594         if (attr->flags)
 595                 return -EINVAL;
 596
 597         return 0;
 598 }
 599
 600 void usnic_ib_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)
 601 {
 602         return;
 603 }
 604
 605 struct ib_mr *usnic_ib_reg_mr(struct ib_pd *pd, u64 start, u64 length,
 606                                         u64 virt_addr, int access_flags,
 607                                         struct ib_udata *udata)
 608 {
 609         struct usnic_ib_mr *mr;
 610         int err;
 611
 612         usnic_dbg("start 0x%llx va 0x%llx length 0x%llx\n", start,
 613                         virt_addr, length);
 614
 615         mr = kzalloc(sizeof(*mr), GFP_KERNEL);
 616         if (!mr)
 617                 return ERR_PTR(-ENOMEM);
 618
 619         mr->umem = usnic_uiom_reg_get(to_upd(pd)->umem_pd, start, length,
 620                                         access_flags, 0);
 621         if (IS_ERR_OR_NULL(mr->umem)) {
 622                 err = mr->umem ? PTR_ERR(mr->umem) : -EFAULT;
 623                 goto err_free;
 624         }
 625
 626         mr->ibmr.lkey = mr->ibmr.rkey = 0;
 627         return &mr->ibmr;
 628
 629 err_free:
 630         kfree(mr);
 631         return ERR_PTR(err);
 632 }
 633
 634 int usnic_ib_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
 635 {
 636         struct usnic_ib_mr *mr = to_umr(ibmr);
 637
 638         usnic_dbg("va 0x%lx length 0x%zx\n", mr->umem->va, mr->umem->length);
 639
 640         usnic_uiom_reg_release(mr->umem);
 641         kfree(mr);
 642         return 0;
 643 }
 644
 645 int usnic_ib_alloc_ucontext(struct ib_ucontext *uctx, struct ib_udata *udata)
 646 {
 647         struct ib_device *ibdev = uctx->device;
 648         struct usnic_ib_ucontext *context = to_ucontext(uctx);
 649         struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
 650         usnic_dbg("\n");
 651
 652         INIT_LIST_HEAD(&context->qp_grp_list);
 653         mutex_lock(&us_ibdev->usdev_lock);
 654         list_add_tail(&context->link, &us_ibdev->ctx_list);
 655         mutex_unlock(&us_ibdev->usdev_lock);
 656
 657         return 0;
 658 }
 659
 660 void usnic_ib_dealloc_ucontext(struct ib_ucontext *ibcontext)
 661 {
 662         struct usnic_ib_ucontext *context = to_uucontext(ibcontext);
 663         struct usnic_ib_dev *us_ibdev = to_usdev(ibcontext->device);
 664         usnic_dbg("\n");
 665
 666         mutex_lock(&us_ibdev->usdev_lock);
 667         WARN_ON_ONCE(!list_empty(&context->qp_grp_list));
 668         list_del(&context->link);
 669         mutex_unlock(&us_ibdev->usdev_lock);
 670 }
 671
 672 int usnic_ib_mmap(struct ib_ucontext *context,
 673                                 struct vm_area_struct *vma)
 674 {
 675         struct usnic_ib_ucontext *uctx = to_ucontext(context);
 676         struct usnic_ib_dev *us_ibdev;
 677         struct usnic_ib_qp_grp *qp_grp;
 678         struct usnic_ib_vf *vf;
 679         struct vnic_dev_bar *bar;
 680         dma_addr_t bus_addr;
 681         unsigned int len;
 682         unsigned int vfid;
 683
 684         usnic_dbg("\n");
 685
 686         us_ibdev = to_usdev(context->device);
 687         vma->vm_flags |= VM_IO;
 688         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 689         vfid = vma->vm_pgoff;
 690         usnic_dbg("Page Offset %lu PAGE_SHIFT %u VFID %u\n",
 691                         vma->vm_pgoff, PAGE_SHIFT, vfid);
 692
 693         mutex_lock(&us_ibdev->usdev_lock);
 694         list_for_each_entry(qp_grp, &uctx->qp_grp_list, link) {
 695                 vf = qp_grp->vf;
 696                 if (usnic_vnic_get_index(vf->vnic) == vfid) {
 697                         bar = usnic_vnic_get_bar(vf->vnic, 0);
 698                         if ((vma->vm_end - vma->vm_start) != bar->len) {
 699                                 usnic_err("Bar0 Len %lu - Request map %lu\n",
 700                                                 bar->len,
 701                                                 vma->vm_end - vma->vm_start);
 702                                 mutex_unlock(&us_ibdev->usdev_lock);
 703                                 return -EINVAL;
 704                         }
 705                         bus_addr = bar->bus_addr;
 706                         len = bar->len;
 707                         usnic_dbg("bus: %pa vaddr: %p size: %ld\n",
 708                                         &bus_addr, bar->vaddr, bar->len);
 709                         mutex_unlock(&us_ibdev->usdev_lock);
 710
 711                         return remap_pfn_range(vma,
 712                                                 vma->vm_start,
 713                                                 bus_addr >> PAGE_SHIFT,
 714                                                 len, vma->vm_page_prot);
 715                 }
 716         }
 717
 718         mutex_unlock(&us_ibdev->usdev_lock);
 719         usnic_err("No VF %u found\n", vfid);
 720         return -EINVAL;
 721 }
 722