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
  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", us_ibdev->ib_dev.name);
 163                 return err;
 164         }
 165
 166         return 0;
 167 }
 168
 169 static struct usnic_ib_qp_grp*
 170 find_free_vf_and_create_qp_grp(struct usnic_ib_dev *us_ibdev,
 171                                 struct usnic_ib_pd *pd,
 172                                 struct usnic_transport_spec *trans_spec,
 173                                 struct usnic_vnic_res_spec *res_spec)
 174 {
 175         struct usnic_ib_vf *vf;
 176         struct usnic_vnic *vnic;
 177         struct usnic_ib_qp_grp *qp_grp;
 178         struct device *dev, **dev_list;
 179         int i;
 180
 181         BUG_ON(!mutex_is_locked(&us_ibdev->usdev_lock));
 182
 183         if (list_empty(&us_ibdev->vf_dev_list)) {
 184                 usnic_info("No vfs to allocate\n");
 185                 return NULL;
 186         }
 187
 188         if (usnic_ib_share_vf) {
 189                 /* Try to find resouces on a used vf which is in pd */
 190                 dev_list = usnic_uiom_get_dev_list(pd->umem_pd);
 191                 if (IS_ERR(dev_list))
 192                         return ERR_CAST(dev_list);
 193                 for (i = 0; dev_list[i]; i++) {
 194                         dev = dev_list[i];
 195                         vf = pci_get_drvdata(to_pci_dev(dev));
 196                         spin_lock(&vf->lock);
 197                         vnic = vf->vnic;
 198                         if (!usnic_vnic_check_room(vnic, res_spec)) {
 199                                 usnic_dbg("Found used vnic %s from %s\n",
 200                                                 us_ibdev->ib_dev.name,
 201                                                 pci_name(usnic_vnic_get_pdev(
 202                                                                         vnic)));
 203                                 qp_grp = usnic_ib_qp_grp_create(us_ibdev->ufdev,
 204                                                                 vf, pd,
 205                                                                 res_spec,
 206                                                                 trans_spec);
 207
 208                                 spin_unlock(&vf->lock);
 209                                 goto qp_grp_check;
 210                         }
 211                         spin_unlock(&vf->lock);
 212
 213                 }
 214                 usnic_uiom_free_dev_list(dev_list);
 215         }
 216
 217         /* Try to find resources on an unused vf */
 218         list_for_each_entry(vf, &us_ibdev->vf_dev_list, link) {
 219                 spin_lock(&vf->lock);
 220                 vnic = vf->vnic;
 221                 if (vf->qp_grp_ref_cnt == 0 &&
 222                     usnic_vnic_check_room(vnic, res_spec) == 0) {
 223                         qp_grp = usnic_ib_qp_grp_create(us_ibdev->ufdev, vf,
 224                                                         pd, res_spec,
 225                                                         trans_spec);
 226
 227                         spin_unlock(&vf->lock);
 228                         goto qp_grp_check;
 229                 }
 230                 spin_unlock(&vf->lock);
 231         }
 232
 233         usnic_info("No free qp grp found on %s\n", us_ibdev->ib_dev.name);
 234         return ERR_PTR(-ENOMEM);
 235
 236 qp_grp_check:
 237         if (IS_ERR_OR_NULL(qp_grp)) {
 238                 usnic_err("Failed to allocate qp_grp\n");
 239                 return ERR_PTR(qp_grp ? PTR_ERR(qp_grp) : -ENOMEM);
 240         }
 241         return qp_grp;
 242 }
 243
 244 static void qp_grp_destroy(struct usnic_ib_qp_grp *qp_grp)
 245 {
 246         struct usnic_ib_vf *vf = qp_grp->vf;
 247
 248         WARN_ON(qp_grp->state != IB_QPS_RESET);
 249
 250         spin_lock(&vf->lock);
 251         usnic_ib_qp_grp_destroy(qp_grp);
 252         spin_unlock(&vf->lock);
 253 }
 254
 255 static int create_qp_validate_user_data(struct usnic_ib_create_qp_cmd cmd)
 256 {
 257         if (cmd.spec.trans_type <= USNIC_TRANSPORT_UNKNOWN ||
 258                         cmd.spec.trans_type >= USNIC_TRANSPORT_MAX)
 259                 return -EINVAL;
 260
 261         return 0;
 262 }
 263
 264 /* Start of ib callback functions */
 265
 266 enum rdma_link_layer usnic_ib_port_link_layer(struct ib_device *device,
 267                                                 u8 port_num)
 268 {
 269         return IB_LINK_LAYER_ETHERNET;
 270 }
 271
 272 int usnic_ib_query_device(struct ib_device *ibdev,
 273                           struct ib_device_attr *props,
 274                           struct ib_udata *uhw)
 275 {
 276         struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
 277         union ib_gid gid;
 278         struct ethtool_drvinfo info;
 279         int qp_per_vf;
 280
 281         usnic_dbg("\n");
 282         if (uhw->inlen || uhw->outlen)
 283                 return -EINVAL;
 284
 285         mutex_lock(&us_ibdev->usdev_lock);
 286         us_ibdev->netdev->ethtool_ops->get_drvinfo(us_ibdev->netdev, &info);
 287         memset(props, 0, sizeof(*props));
 288         usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr,
 289                         &gid.raw[0]);
 290         memcpy(&props->sys_image_guid, &gid.global.interface_id,
 291                 sizeof(gid.global.interface_id));
 292         usnic_ib_fw_string_to_u64(&info.fw_version[0], &props->fw_ver);
 293         props->max_mr_size = USNIC_UIOM_MAX_MR_SIZE;
 294         props->page_size_cap = USNIC_UIOM_PAGE_SIZE;
 295         props->vendor_id = PCI_VENDOR_ID_CISCO;
 296         props->vendor_part_id = PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC;
 297         props->hw_ver = us_ibdev->pdev->subsystem_device;
 298         qp_per_vf = max(us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_WQ],
 299                         us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_RQ]);
 300         props->max_qp = qp_per_vf *
 301                 kref_read(&us_ibdev->vf_cnt);
 302         props->device_cap_flags = IB_DEVICE_PORT_ACTIVE_EVENT |
 303                 IB_DEVICE_SYS_IMAGE_GUID | IB_DEVICE_BLOCK_MULTICAST_LOOPBACK;
 304         props->max_cq = us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_CQ] *
 305                 kref_read(&us_ibdev->vf_cnt);
 306         props->max_pd = USNIC_UIOM_MAX_PD_CNT;
 307         props->max_mr = USNIC_UIOM_MAX_MR_CNT;
 308         props->local_ca_ack_delay = 0;
 309         props->max_pkeys = 0;
 310         props->atomic_cap = IB_ATOMIC_NONE;
 311         props->masked_atomic_cap = props->atomic_cap;
 312         props->max_qp_rd_atom = 0;
 313         props->max_qp_init_rd_atom = 0;
 314         props->max_res_rd_atom = 0;
 315         props->max_srq = 0;
 316         props->max_srq_wr = 0;
 317         props->max_srq_sge = 0;
 318         props->max_fast_reg_page_list_len = 0;
 319         props->max_mcast_grp = 0;
 320         props->max_mcast_qp_attach = 0;
 321         props->max_total_mcast_qp_attach = 0;
 322         props->max_map_per_fmr = 0;
 323         /* Owned by Userspace
 324          * max_qp_wr, max_sge, max_sge_rd, max_cqe */
 325         mutex_unlock(&us_ibdev->usdev_lock);
 326
 327         return 0;
 328 }
 329
 330 int usnic_ib_query_port(struct ib_device *ibdev, u8 port,
 331                                 struct ib_port_attr *props)
 332 {
 333         struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
 334
 335         usnic_dbg("\n");
 336
 337         mutex_lock(&us_ibdev->usdev_lock);
 338         if (ib_get_eth_speed(ibdev, port, &props->active_speed,
 339                              &props->active_width)) {
 340                 mutex_unlock(&us_ibdev->usdev_lock);
 341                 return -EINVAL;
 342         }
 343
 344         /* props being zeroed by the caller, avoid zeroing it here */
 345
 346         props->lid = 0;
 347         props->lmc = 1;
 348         props->sm_lid = 0;
 349         props->sm_sl = 0;
 350
 351         if (!us_ibdev->ufdev->link_up) {
 352                 props->state = IB_PORT_DOWN;
 353                 props->phys_state = 3;
 354         } else if (!us_ibdev->ufdev->inaddr) {
 355                 props->state = IB_PORT_INIT;
 356                 props->phys_state = 4;
 357         } else {
 358                 props->state = IB_PORT_ACTIVE;
 359                 props->phys_state = 5;
 360         }
 361
 362         props->port_cap_flags = 0;
 363         props->gid_tbl_len = 1;
 364         props->pkey_tbl_len = 1;
 365         props->bad_pkey_cntr = 0;
 366         props->qkey_viol_cntr = 0;
 367         props->max_mtu = IB_MTU_4096;
 368         props->active_mtu = iboe_get_mtu(us_ibdev->ufdev->mtu);
 369         /* Userspace will adjust for hdrs */
 370         props->max_msg_sz = us_ibdev->ufdev->mtu;
 371         props->max_vl_num = 1;
 372         mutex_unlock(&us_ibdev->usdev_lock);
 373
 374         return 0;
 375 }
 376
 377 int usnic_ib_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
 378                                 int qp_attr_mask,
 379                                 struct ib_qp_init_attr *qp_init_attr)
 380 {
 381         struct usnic_ib_qp_grp *qp_grp;
 382         struct usnic_ib_vf *vf;
 383         int err;
 384
 385         usnic_dbg("\n");
 386
 387         memset(qp_attr, 0, sizeof(*qp_attr));
 388         memset(qp_init_attr, 0, sizeof(*qp_init_attr));
 389
 390         qp_grp = to_uqp_grp(qp);
 391         vf = qp_grp->vf;
 392         mutex_lock(&vf->pf->usdev_lock);
 393         usnic_dbg("\n");
 394         qp_attr->qp_state = qp_grp->state;
 395         qp_attr->cur_qp_state = qp_grp->state;
 396
 397         switch (qp_grp->ibqp.qp_type) {
 398         case IB_QPT_UD:
 399                 qp_attr->qkey = 0;
 400                 break;
 401         default:
 402                 usnic_err("Unexpected qp_type %d\n", qp_grp->ibqp.qp_type);
 403                 err = -EINVAL;
 404                 goto err_out;
 405         }
 406
 407         mutex_unlock(&vf->pf->usdev_lock);
 408         return 0;
 409
 410 err_out:
 411         mutex_unlock(&vf->pf->usdev_lock);
 412         return err;
 413 }
 414
 415 int usnic_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
 416                                 union ib_gid *gid)
 417 {
 418
 419         struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
 420         usnic_dbg("\n");
 421
 422         if (index > 1)
 423                 return -EINVAL;
 424
 425         mutex_lock(&us_ibdev->usdev_lock);
 426         memset(&(gid->raw[0]), 0, sizeof(gid->raw));
 427         usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr,
 428                         &gid->raw[0]);
 429         mutex_unlock(&us_ibdev->usdev_lock);
 430
 431         return 0;
 432 }
 433
 434 struct net_device *usnic_get_netdev(struct ib_device *device, u8 port_num)
 435 {
 436         struct usnic_ib_dev *us_ibdev = to_usdev(device);
 437
 438         if (us_ibdev->netdev)
 439                 dev_hold(us_ibdev->netdev);
 440
 441         return us_ibdev->netdev;
 442 }
 443
 444 int usnic_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
 445                                 u16 *pkey)
 446 {
 447         if (index > 1)
 448                 return -EINVAL;
 449
 450         *pkey = 0xffff;
 451         return 0;
 452 }
 453
 454 struct ib_pd *usnic_ib_alloc_pd(struct ib_device *ibdev,
 455                                         struct ib_ucontext *context,
 456                                         struct ib_udata *udata)
 457 {
 458         struct usnic_ib_pd *pd;
 459         void *umem_pd;
 460
 461         usnic_dbg("\n");
 462
 463         pd = kzalloc(sizeof(*pd), GFP_KERNEL);
 464         if (!pd)
 465                 return ERR_PTR(-ENOMEM);
 466
 467         umem_pd = pd->umem_pd = usnic_uiom_alloc_pd();
 468         if (IS_ERR_OR_NULL(umem_pd)) {
 469                 kfree(pd);
 470                 return ERR_PTR(umem_pd ? PTR_ERR(umem_pd) : -ENOMEM);
 471         }
 472
 473         usnic_info("domain 0x%p allocated for context 0x%p and device %s\n",
 474                         pd, context, ibdev->name);
 475         return &pd->ibpd;
 476 }
 477
 478 int usnic_ib_dealloc_pd(struct ib_pd *pd)
 479 {
 480         usnic_info("freeing domain 0x%p\n", pd);
 481
 482         usnic_uiom_dealloc_pd((to_upd(pd))->umem_pd);
 483         kfree(pd);
 484         return 0;
 485 }
 486
 487 struct ib_qp *usnic_ib_create_qp(struct ib_pd *pd,
 488                                         struct ib_qp_init_attr *init_attr,
 489                                         struct ib_udata *udata)
 490 {
 491         int err;
 492         struct usnic_ib_dev *us_ibdev;
 493         struct usnic_ib_qp_grp *qp_grp;
 494         struct usnic_ib_ucontext *ucontext;
 495         int cq_cnt;
 496         struct usnic_vnic_res_spec res_spec;
 497         struct usnic_ib_create_qp_cmd cmd;
 498         struct usnic_transport_spec trans_spec;
 499
 500         usnic_dbg("\n");
 501
 502         ucontext = to_uucontext(pd->uobject->context);
 503         us_ibdev = to_usdev(pd->device);
 504
 505         if (init_attr->create_flags)
 506                 return ERR_PTR(-EINVAL);
 507
 508         err = ib_copy_from_udata(&cmd, udata, sizeof(cmd));
 509         if (err) {
 510                 usnic_err("%s: cannot copy udata for create_qp\n",
 511                                 us_ibdev->ib_dev.name);
 512                 return ERR_PTR(-EINVAL);
 513         }
 514
 515         err = create_qp_validate_user_data(cmd);
 516         if (err) {
 517                 usnic_err("%s: Failed to validate user data\n",
 518                                 us_ibdev->ib_dev.name);
 519                 return ERR_PTR(-EINVAL);
 520         }
 521
 522         if (init_attr->qp_type != IB_QPT_UD) {
 523                 usnic_err("%s asked to make a non-UD QP: %d\n",
 524                                 us_ibdev->ib_dev.name, init_attr->qp_type);
 525                 return ERR_PTR(-EINVAL);
 526         }
 527
 528         trans_spec = cmd.spec;
 529         mutex_lock(&us_ibdev->usdev_lock);
 530         cq_cnt = (init_attr->send_cq == init_attr->recv_cq) ? 1 : 2;
 531         res_spec = min_transport_spec[trans_spec.trans_type];
 532         usnic_vnic_res_spec_update(&res_spec, USNIC_VNIC_RES_TYPE_CQ, cq_cnt);
 533         qp_grp = find_free_vf_and_create_qp_grp(us_ibdev, to_upd(pd),
 534                                                 &trans_spec,
 535                                                 &res_spec);
 536         if (IS_ERR_OR_NULL(qp_grp)) {
 537                 err = qp_grp ? PTR_ERR(qp_grp) : -ENOMEM;
 538                 goto out_release_mutex;
 539         }
 540
 541         err = usnic_ib_fill_create_qp_resp(qp_grp, udata);
 542         if (err) {
 543                 err = -EBUSY;
 544                 goto out_release_qp_grp;
 545         }
 546
 547         qp_grp->ctx = ucontext;
 548         list_add_tail(&qp_grp->link, &ucontext->qp_grp_list);
 549         usnic_ib_log_vf(qp_grp->vf);
 550         mutex_unlock(&us_ibdev->usdev_lock);
 551         return &qp_grp->ibqp;
 552
 553 out_release_qp_grp:
 554         qp_grp_destroy(qp_grp);
 555 out_release_mutex:
 556         mutex_unlock(&us_ibdev->usdev_lock);
 557         return ERR_PTR(err);
 558 }
 559
 560 int usnic_ib_destroy_qp(struct ib_qp *qp)
 561 {
 562         struct usnic_ib_qp_grp *qp_grp;
 563         struct usnic_ib_vf *vf;
 564
 565         usnic_dbg("\n");
 566
 567         qp_grp = to_uqp_grp(qp);
 568         vf = qp_grp->vf;
 569         mutex_lock(&vf->pf->usdev_lock);
 570         if (usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RESET, NULL)) {
 571                 usnic_err("Failed to move qp grp %u to reset\n",
 572                                 qp_grp->grp_id);
 573         }
 574
 575         list_del(&qp_grp->link);
 576         qp_grp_destroy(qp_grp);
 577         mutex_unlock(&vf->pf->usdev_lock);
 578
 579         return 0;
 580 }
 581
 582 int usnic_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
 583                                 int attr_mask, struct ib_udata *udata)
 584 {
 585         struct usnic_ib_qp_grp *qp_grp;
 586         int status;
 587         usnic_dbg("\n");
 588
 589         qp_grp = to_uqp_grp(ibqp);
 590
 591         mutex_lock(&qp_grp->vf->pf->usdev_lock);
 592         if ((attr_mask & IB_QP_PORT) && attr->port_num != 1) {
 593                 /* usnic devices only have one port */
 594                 status = -EINVAL;
 595                 goto out_unlock;
 596         }
 597         if (attr_mask & IB_QP_STATE) {
 598                 status = usnic_ib_qp_grp_modify(qp_grp, attr->qp_state, NULL);
 599         } else {
 600                 usnic_err("Unhandled request, attr_mask=0x%x\n", attr_mask);
 601                 status = -EINVAL;
 602         }
 603
 604 out_unlock:
 605         mutex_unlock(&qp_grp->vf->pf->usdev_lock);
 606         return status;
 607 }
 608
 609 struct ib_cq *usnic_ib_create_cq(struct ib_device *ibdev,
 610                                  const struct ib_cq_init_attr *attr,
 611                                  struct ib_ucontext *context,
 612                                  struct ib_udata *udata)
 613 {
 614         struct ib_cq *cq;
 615
 616         usnic_dbg("\n");
 617         if (attr->flags)
 618                 return ERR_PTR(-EINVAL);
 619
 620         cq = kzalloc(sizeof(*cq), GFP_KERNEL);
 621         if (!cq)
 622                 return ERR_PTR(-EBUSY);
 623
 624         return cq;
 625 }
 626
 627 int usnic_ib_destroy_cq(struct ib_cq *cq)
 628 {
 629         usnic_dbg("\n");
 630         kfree(cq);
 631         return 0;
 632 }
 633
 634 struct ib_mr *usnic_ib_reg_mr(struct ib_pd *pd, u64 start, u64 length,
 635                                         u64 virt_addr, int access_flags,
 636                                         struct ib_udata *udata)
 637 {
 638         struct usnic_ib_mr *mr;
 639         int err;
 640
 641         usnic_dbg("start 0x%llx va 0x%llx length 0x%llx\n", start,
 642                         virt_addr, length);
 643
 644         mr = kzalloc(sizeof(*mr), GFP_KERNEL);
 645         if (!mr)
 646                 return ERR_PTR(-ENOMEM);
 647
 648         mr->umem = usnic_uiom_reg_get(to_upd(pd)->umem_pd, start, length,
 649                                         access_flags, 0);
 650         if (IS_ERR_OR_NULL(mr->umem)) {
 651                 err = mr->umem ? PTR_ERR(mr->umem) : -EFAULT;
 652                 goto err_free;
 653         }
 654
 655         mr->ibmr.lkey = mr->ibmr.rkey = 0;
 656         return &mr->ibmr;
 657
 658 err_free:
 659         kfree(mr);
 660         return ERR_PTR(err);
 661 }
 662
 663 int usnic_ib_dereg_mr(struct ib_mr *ibmr)
 664 {
 665         struct usnic_ib_mr *mr = to_umr(ibmr);
 666
 667         usnic_dbg("va 0x%lx length 0x%zx\n", mr->umem->va, mr->umem->length);
 668
 669         usnic_uiom_reg_release(mr->umem, ibmr->pd->uobject->context->closing);
 670         kfree(mr);
 671         return 0;
 672 }
 673
 674 struct ib_ucontext *usnic_ib_alloc_ucontext(struct ib_device *ibdev,
 675                                                         struct ib_udata *udata)
 676 {
 677         struct usnic_ib_ucontext *context;
 678         struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
 679         usnic_dbg("\n");
 680
 681         context = kmalloc(sizeof(*context), GFP_KERNEL);
 682         if (!context)
 683                 return ERR_PTR(-ENOMEM);
 684
 685         INIT_LIST_HEAD(&context->qp_grp_list);
 686         mutex_lock(&us_ibdev->usdev_lock);
 687         list_add_tail(&context->link, &us_ibdev->ctx_list);
 688         mutex_unlock(&us_ibdev->usdev_lock);
 689
 690         return &context->ibucontext;
 691 }
 692
 693 int usnic_ib_dealloc_ucontext(struct ib_ucontext *ibcontext)
 694 {
 695         struct usnic_ib_ucontext *context = to_uucontext(ibcontext);
 696         struct usnic_ib_dev *us_ibdev = to_usdev(ibcontext->device);
 697         usnic_dbg("\n");
 698
 699         mutex_lock(&us_ibdev->usdev_lock);
 700         BUG_ON(!list_empty(&context->qp_grp_list));
 701         list_del(&context->link);
 702         mutex_unlock(&us_ibdev->usdev_lock);
 703         kfree(context);
 704         return 0;
 705 }
 706
 707 int usnic_ib_mmap(struct ib_ucontext *context,
 708                                 struct vm_area_struct *vma)
 709 {
 710         struct usnic_ib_ucontext *uctx = to_ucontext(context);
 711         struct usnic_ib_dev *us_ibdev;
 712         struct usnic_ib_qp_grp *qp_grp;
 713         struct usnic_ib_vf *vf;
 714         struct vnic_dev_bar *bar;
 715         dma_addr_t bus_addr;
 716         unsigned int len;
 717         unsigned int vfid;
 718
 719         usnic_dbg("\n");
 720
 721         us_ibdev = to_usdev(context->device);
 722         vma->vm_flags |= VM_IO;
 723         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 724         vfid = vma->vm_pgoff;
 725         usnic_dbg("Page Offset %lu PAGE_SHIFT %u VFID %u\n",
 726                         vma->vm_pgoff, PAGE_SHIFT, vfid);
 727
 728         mutex_lock(&us_ibdev->usdev_lock);
 729         list_for_each_entry(qp_grp, &uctx->qp_grp_list, link) {
 730                 vf = qp_grp->vf;
 731                 if (usnic_vnic_get_index(vf->vnic) == vfid) {
 732                         bar = usnic_vnic_get_bar(vf->vnic, 0);
 733                         if ((vma->vm_end - vma->vm_start) != bar->len) {
 734                                 usnic_err("Bar0 Len %lu - Request map %lu\n",
 735                                                 bar->len,
 736                                                 vma->vm_end - vma->vm_start);
 737                                 mutex_unlock(&us_ibdev->usdev_lock);
 738                                 return -EINVAL;
 739                         }
 740                         bus_addr = bar->bus_addr;
 741                         len = bar->len;
 742                         usnic_dbg("bus: %pa vaddr: %p size: %ld\n",
 743                                         &bus_addr, bar->vaddr, bar->len);
 744                         mutex_unlock(&us_ibdev->usdev_lock);
 745
 746                         return remap_pfn_range(vma,
 747                                                 vma->vm_start,
 748                                                 bus_addr >> PAGE_SHIFT,
 749                                                 len, vma->vm_page_prot);
 750                 }
 751         }
 752
 753         mutex_unlock(&us_ibdev->usdev_lock);
 754         usnic_err("No VF %u found\n", vfid);
 755         return -EINVAL;
 756 }
 757
 758 /* In ib callbacks section -  Start of stub funcs */
 759 struct ib_ah *usnic_ib_create_ah(struct ib_pd *pd,
 760                                  struct rdma_ah_attr *ah_attr,
 761                                  struct ib_udata *udata)
 762
 763 {
 764         usnic_dbg("\n");
 765         return ERR_PTR(-EPERM);
 766 }
 767
 768 int usnic_ib_destroy_ah(struct ib_ah *ah)
 769 {
 770         usnic_dbg("\n");
 771         return -EINVAL;
 772 }
 773
 774 int usnic_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
 775                                 struct ib_send_wr **bad_wr)
 776 {
 777         usnic_dbg("\n");
 778         return -EINVAL;
 779 }
 780
 781 int usnic_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
 782                                 struct ib_recv_wr **bad_wr)
 783 {
 784         usnic_dbg("\n");
 785         return -EINVAL;
 786 }
 787
 788 int usnic_ib_poll_cq(struct ib_cq *ibcq, int num_entries,
 789                                 struct ib_wc *wc)
 790 {
 791         usnic_dbg("\n");
 792         return -EINVAL;
 793 }
 794
 795 int usnic_ib_req_notify_cq(struct ib_cq *cq,
 796                                         enum ib_cq_notify_flags flags)
 797 {
 798         usnic_dbg("\n");
 799         return -EINVAL;
 800 }
 801
 802 struct ib_mr *usnic_ib_get_dma_mr(struct ib_pd *pd, int acc)
 803 {
 804         usnic_dbg("\n");
 805         return ERR_PTR(-ENOMEM);
 806 }
 807
 808
 809 /* In ib callbacks section - End of stub funcs */
 810 /* End of ib callbacks section */