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                 dev_list = NULL;
 216         }
 217
 218         /* Try to find resources on an unused vf */
 219         list_for_each_entry(vf, &us_ibdev->vf_dev_list, link) {
 220                 spin_lock(&vf->lock);
 221                 vnic = vf->vnic;
 222                 if (vf->qp_grp_ref_cnt == 0 &&
 223                     usnic_vnic_check_room(vnic, res_spec) == 0) {
 224                         qp_grp = usnic_ib_qp_grp_create(us_ibdev->ufdev, vf,
 225                                                         pd, res_spec,
 226                                                         trans_spec);
 227
 228                         spin_unlock(&vf->lock);
 229                         goto qp_grp_check;
 230                 }
 231                 spin_unlock(&vf->lock);
 232         }
 233
 234         usnic_info("No free qp grp found on %s\n", us_ibdev->ib_dev.name);
 235         return ERR_PTR(-ENOMEM);
 236
 237 qp_grp_check:
 238         if (IS_ERR_OR_NULL(qp_grp)) {
 239                 usnic_err("Failed to allocate qp_grp\n");
 240                 if (usnic_ib_share_vf)
 241                         usnic_uiom_free_dev_list(dev_list);
 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 = 3;
 360         } else if (!us_ibdev->ufdev->inaddr) {
 361                 props->state = IB_PORT_INIT;
 362                 props->phys_state = 4;
 363         } else {
 364                 props->state = IB_PORT_ACTIVE;
 365                 props->phys_state = 5;
 366         }
 367
 368         props->port_cap_flags = 0;
 369         props->gid_tbl_len = 1;
 370         props->pkey_tbl_len = 1;
 371         props->bad_pkey_cntr = 0;
 372         props->qkey_viol_cntr = 0;
 373         props->max_mtu = IB_MTU_4096;
 374         props->active_mtu = iboe_get_mtu(us_ibdev->ufdev->mtu);
 375         /* Userspace will adjust for hdrs */
 376         props->max_msg_sz = us_ibdev->ufdev->mtu;
 377         props->max_vl_num = 1;
 378         mutex_unlock(&us_ibdev->usdev_lock);
 379
 380         return 0;
 381 }
 382
 383 int usnic_ib_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
 384                                 int qp_attr_mask,
 385                                 struct ib_qp_init_attr *qp_init_attr)
 386 {
 387         struct usnic_ib_qp_grp *qp_grp;
 388         struct usnic_ib_vf *vf;
 389         int err;
 390
 391         usnic_dbg("\n");
 392
 393         memset(qp_attr, 0, sizeof(*qp_attr));
 394         memset(qp_init_attr, 0, sizeof(*qp_init_attr));
 395
 396         qp_grp = to_uqp_grp(qp);
 397         vf = qp_grp->vf;
 398         mutex_lock(&vf->pf->usdev_lock);
 399         usnic_dbg("\n");
 400         qp_attr->qp_state = qp_grp->state;
 401         qp_attr->cur_qp_state = qp_grp->state;
 402
 403         switch (qp_grp->ibqp.qp_type) {
 404         case IB_QPT_UD:
 405                 qp_attr->qkey = 0;
 406                 break;
 407         default:
 408                 usnic_err("Unexpected qp_type %d\n", qp_grp->ibqp.qp_type);
 409                 err = -EINVAL;
 410                 goto err_out;
 411         }
 412
 413         mutex_unlock(&vf->pf->usdev_lock);
 414         return 0;
 415
 416 err_out:
 417         mutex_unlock(&vf->pf->usdev_lock);
 418         return err;
 419 }
 420
 421 int usnic_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
 422                                 union ib_gid *gid)
 423 {
 424
 425         struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
 426         usnic_dbg("\n");
 427
 428         if (index > 1)
 429                 return -EINVAL;
 430
 431         mutex_lock(&us_ibdev->usdev_lock);
 432         memset(&(gid->raw[0]), 0, sizeof(gid->raw));
 433         usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr,
 434                         &gid->raw[0]);
 435         mutex_unlock(&us_ibdev->usdev_lock);
 436
 437         return 0;
 438 }
 439
 440 struct net_device *usnic_get_netdev(struct ib_device *device, u8 port_num)
 441 {
 442         struct usnic_ib_dev *us_ibdev = to_usdev(device);
 443
 444         if (us_ibdev->netdev)
 445                 dev_hold(us_ibdev->netdev);
 446
 447         return us_ibdev->netdev;
 448 }
 449
 450 int usnic_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
 451                                 u16 *pkey)
 452 {
 453         if (index > 0)
 454                 return -EINVAL;
 455
 456         *pkey = 0xffff;
 457         return 0;
 458 }
 459
 460 struct ib_pd *usnic_ib_alloc_pd(struct ib_device *ibdev,
 461                                         struct ib_ucontext *context,
 462                                         struct ib_udata *udata)
 463 {
 464         struct usnic_ib_pd *pd;
 465         void *umem_pd;
 466
 467         usnic_dbg("\n");
 468
 469         pd = kzalloc(sizeof(*pd), GFP_KERNEL);
 470         if (!pd)
 471                 return ERR_PTR(-ENOMEM);
 472
 473         umem_pd = pd->umem_pd = usnic_uiom_alloc_pd();
 474         if (IS_ERR_OR_NULL(umem_pd)) {
 475                 kfree(pd);
 476                 return ERR_PTR(umem_pd ? PTR_ERR(umem_pd) : -ENOMEM);
 477         }
 478
 479         usnic_info("domain 0x%p allocated for context 0x%p and device %s\n",
 480                         pd, context, ibdev->name);
 481         return &pd->ibpd;
 482 }
 483
 484 int usnic_ib_dealloc_pd(struct ib_pd *pd)
 485 {
 486         usnic_info("freeing domain 0x%p\n", pd);
 487
 488         usnic_uiom_dealloc_pd((to_upd(pd))->umem_pd);
 489         kfree(pd);
 490         return 0;
 491 }
 492
 493 struct ib_qp *usnic_ib_create_qp(struct ib_pd *pd,
 494                                         struct ib_qp_init_attr *init_attr,
 495                                         struct ib_udata *udata)
 496 {
 497         int err;
 498         struct usnic_ib_dev *us_ibdev;
 499         struct usnic_ib_qp_grp *qp_grp;
 500         struct usnic_ib_ucontext *ucontext;
 501         int cq_cnt;
 502         struct usnic_vnic_res_spec res_spec;
 503         struct usnic_ib_create_qp_cmd cmd;
 504         struct usnic_transport_spec trans_spec;
 505
 506         usnic_dbg("\n");
 507
 508         ucontext = to_uucontext(pd->uobject->context);
 509         us_ibdev = to_usdev(pd->device);
 510
 511         if (init_attr->create_flags)
 512                 return ERR_PTR(-EINVAL);
 513
 514         err = ib_copy_from_udata(&cmd, udata, sizeof(cmd));
 515         if (err) {
 516                 usnic_err("%s: cannot copy udata for create_qp\n",
 517                                 us_ibdev->ib_dev.name);
 518                 return ERR_PTR(-EINVAL);
 519         }
 520
 521         err = create_qp_validate_user_data(cmd);
 522         if (err) {
 523                 usnic_err("%s: Failed to validate user data\n",
 524                                 us_ibdev->ib_dev.name);
 525                 return ERR_PTR(-EINVAL);
 526         }
 527
 528         if (init_attr->qp_type != IB_QPT_UD) {
 529                 usnic_err("%s asked to make a non-UD QP: %d\n",
 530                                 us_ibdev->ib_dev.name, init_attr->qp_type);
 531                 return ERR_PTR(-EINVAL);
 532         }
 533
 534         trans_spec = cmd.spec;
 535         mutex_lock(&us_ibdev->usdev_lock);
 536         cq_cnt = (init_attr->send_cq == init_attr->recv_cq) ? 1 : 2;
 537         res_spec = min_transport_spec[trans_spec.trans_type];
 538         usnic_vnic_res_spec_update(&res_spec, USNIC_VNIC_RES_TYPE_CQ, cq_cnt);
 539         qp_grp = find_free_vf_and_create_qp_grp(us_ibdev, to_upd(pd),
 540                                                 &trans_spec,
 541                                                 &res_spec);
 542         if (IS_ERR_OR_NULL(qp_grp)) {
 543                 err = qp_grp ? PTR_ERR(qp_grp) : -ENOMEM;
 544                 goto out_release_mutex;
 545         }
 546
 547         err = usnic_ib_fill_create_qp_resp(qp_grp, udata);
 548         if (err) {
 549                 err = -EBUSY;
 550                 goto out_release_qp_grp;
 551         }
 552
 553         qp_grp->ctx = ucontext;
 554         list_add_tail(&qp_grp->link, &ucontext->qp_grp_list);
 555         usnic_ib_log_vf(qp_grp->vf);
 556         mutex_unlock(&us_ibdev->usdev_lock);
 557         return &qp_grp->ibqp;
 558
 559 out_release_qp_grp:
 560         qp_grp_destroy(qp_grp);
 561 out_release_mutex:
 562         mutex_unlock(&us_ibdev->usdev_lock);
 563         return ERR_PTR(err);
 564 }
 565
 566 int usnic_ib_destroy_qp(struct ib_qp *qp)
 567 {
 568         struct usnic_ib_qp_grp *qp_grp;
 569         struct usnic_ib_vf *vf;
 570
 571         usnic_dbg("\n");
 572
 573         qp_grp = to_uqp_grp(qp);
 574         vf = qp_grp->vf;
 575         mutex_lock(&vf->pf->usdev_lock);
 576         if (usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RESET, NULL)) {
 577                 usnic_err("Failed to move qp grp %u to reset\n",
 578                                 qp_grp->grp_id);
 579         }
 580
 581         list_del(&qp_grp->link);
 582         qp_grp_destroy(qp_grp);
 583         mutex_unlock(&vf->pf->usdev_lock);
 584
 585         return 0;
 586 }
 587
 588 int usnic_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
 589                                 int attr_mask, struct ib_udata *udata)
 590 {
 591         struct usnic_ib_qp_grp *qp_grp;
 592         int status;
 593         usnic_dbg("\n");
 594
 595         qp_grp = to_uqp_grp(ibqp);
 596
 597         mutex_lock(&qp_grp->vf->pf->usdev_lock);
 598         if ((attr_mask & IB_QP_PORT) && attr->port_num != 1) {
 599                 /* usnic devices only have one port */
 600                 status = -EINVAL;
 601                 goto out_unlock;
 602         }
 603         if (attr_mask & IB_QP_STATE) {
 604                 status = usnic_ib_qp_grp_modify(qp_grp, attr->qp_state, NULL);
 605         } else {
 606                 usnic_err("Unhandled request, attr_mask=0x%x\n", attr_mask);
 607                 status = -EINVAL;
 608         }
 609
 610 out_unlock:
 611         mutex_unlock(&qp_grp->vf->pf->usdev_lock);
 612         return status;
 613 }
 614
 615 struct ib_cq *usnic_ib_create_cq(struct ib_device *ibdev,
 616                                  const struct ib_cq_init_attr *attr,
 617                                  struct ib_ucontext *context,
 618                                  struct ib_udata *udata)
 619 {
 620         struct ib_cq *cq;
 621
 622         usnic_dbg("\n");
 623         if (attr->flags)
 624                 return ERR_PTR(-EINVAL);
 625
 626         cq = kzalloc(sizeof(*cq), GFP_KERNEL);
 627         if (!cq)
 628                 return ERR_PTR(-EBUSY);
 629
 630         return cq;
 631 }
 632
 633 int usnic_ib_destroy_cq(struct ib_cq *cq)
 634 {
 635         usnic_dbg("\n");
 636         kfree(cq);
 637         return 0;
 638 }
 639
 640 struct ib_mr *usnic_ib_reg_mr(struct ib_pd *pd, u64 start, u64 length,
 641                                         u64 virt_addr, int access_flags,
 642                                         struct ib_udata *udata)
 643 {
 644         struct usnic_ib_mr *mr;
 645         int err;
 646
 647         usnic_dbg("start 0x%llx va 0x%llx length 0x%llx\n", start,
 648                         virt_addr, length);
 649
 650         mr = kzalloc(sizeof(*mr), GFP_KERNEL);
 651         if (!mr)
 652                 return ERR_PTR(-ENOMEM);
 653
 654         mr->umem = usnic_uiom_reg_get(to_upd(pd)->umem_pd, start, length,
 655                                         access_flags, 0);
 656         if (IS_ERR_OR_NULL(mr->umem)) {
 657                 err = mr->umem ? PTR_ERR(mr->umem) : -EFAULT;
 658                 goto err_free;
 659         }
 660
 661         mr->ibmr.lkey = mr->ibmr.rkey = 0;
 662         return &mr->ibmr;
 663
 664 err_free:
 665         kfree(mr);
 666         return ERR_PTR(err);
 667 }
 668
 669 int usnic_ib_dereg_mr(struct ib_mr *ibmr)
 670 {
 671         struct usnic_ib_mr *mr = to_umr(ibmr);
 672
 673         usnic_dbg("va 0x%lx length 0x%zx\n", mr->umem->va, mr->umem->length);
 674
 675         usnic_uiom_reg_release(mr->umem, ibmr->uobject->context);
 676         kfree(mr);
 677         return 0;
 678 }
 679
 680 struct ib_ucontext *usnic_ib_alloc_ucontext(struct ib_device *ibdev,
 681                                                         struct ib_udata *udata)
 682 {
 683         struct usnic_ib_ucontext *context;
 684         struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
 685         usnic_dbg("\n");
 686
 687         context = kmalloc(sizeof(*context), GFP_KERNEL);
 688         if (!context)
 689                 return ERR_PTR(-ENOMEM);
 690
 691         INIT_LIST_HEAD(&context->qp_grp_list);
 692         mutex_lock(&us_ibdev->usdev_lock);
 693         list_add_tail(&context->link, &us_ibdev->ctx_list);
 694         mutex_unlock(&us_ibdev->usdev_lock);
 695
 696         return &context->ibucontext;
 697 }
 698
 699 int usnic_ib_dealloc_ucontext(struct ib_ucontext *ibcontext)
 700 {
 701         struct usnic_ib_ucontext *context = to_uucontext(ibcontext);
 702         struct usnic_ib_dev *us_ibdev = to_usdev(ibcontext->device);
 703         usnic_dbg("\n");
 704
 705         mutex_lock(&us_ibdev->usdev_lock);
 706         BUG_ON(!list_empty(&context->qp_grp_list));
 707         list_del(&context->link);
 708         mutex_unlock(&us_ibdev->usdev_lock);
 709         kfree(context);
 710         return 0;
 711 }
 712
 713 int usnic_ib_mmap(struct ib_ucontext *context,
 714                                 struct vm_area_struct *vma)
 715 {
 716         struct usnic_ib_ucontext *uctx = to_ucontext(context);
 717         struct usnic_ib_dev *us_ibdev;
 718         struct usnic_ib_qp_grp *qp_grp;
 719         struct usnic_ib_vf *vf;
 720         struct vnic_dev_bar *bar;
 721         dma_addr_t bus_addr;
 722         unsigned int len;
 723         unsigned int vfid;
 724
 725         usnic_dbg("\n");
 726
 727         us_ibdev = to_usdev(context->device);
 728         vma->vm_flags |= VM_IO;
 729         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 730         vfid = vma->vm_pgoff;
 731         usnic_dbg("Page Offset %lu PAGE_SHIFT %u VFID %u\n",
 732                         vma->vm_pgoff, PAGE_SHIFT, vfid);
 733
 734         mutex_lock(&us_ibdev->usdev_lock);
 735         list_for_each_entry(qp_grp, &uctx->qp_grp_list, link) {
 736                 vf = qp_grp->vf;
 737                 if (usnic_vnic_get_index(vf->vnic) == vfid) {
 738                         bar = usnic_vnic_get_bar(vf->vnic, 0);
 739                         if ((vma->vm_end - vma->vm_start) != bar->len) {
 740                                 usnic_err("Bar0 Len %lu - Request map %lu\n",
 741                                                 bar->len,
 742                                                 vma->vm_end - vma->vm_start);
 743                                 mutex_unlock(&us_ibdev->usdev_lock);
 744                                 return -EINVAL;
 745                         }
 746                         bus_addr = bar->bus_addr;
 747                         len = bar->len;
 748                         usnic_dbg("bus: %pa vaddr: %p size: %ld\n",
 749                                         &bus_addr, bar->vaddr, bar->len);
 750                         mutex_unlock(&us_ibdev->usdev_lock);
 751
 752                         return remap_pfn_range(vma,
 753                                                 vma->vm_start,
 754                                                 bus_addr >> PAGE_SHIFT,
 755                                                 len, vma->vm_page_prot);
 756                 }
 757         }
 758
 759         mutex_unlock(&us_ibdev->usdev_lock);
 760         usnic_err("No VF %u found\n", vfid);
 761         return -EINVAL;
 762 }
 763
 764 /* In ib callbacks section -  Start of stub funcs */
 765 struct ib_ah *usnic_ib_create_ah(struct ib_pd *pd,
 766                                  struct rdma_ah_attr *ah_attr,
 767                                  struct ib_udata *udata)
 768
 769 {
 770         usnic_dbg("\n");
 771         return ERR_PTR(-EPERM);
 772 }
 773
 774 int usnic_ib_destroy_ah(struct ib_ah *ah)
 775 {
 776         usnic_dbg("\n");
 777         return -EINVAL;
 778 }
 779
 780 int usnic_ib_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
 781                        const struct ib_send_wr **bad_wr)
 782 {
 783         usnic_dbg("\n");
 784         return -EINVAL;
 785 }
 786
 787 int usnic_ib_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr,
 788                        const struct ib_recv_wr **bad_wr)
 789 {
 790         usnic_dbg("\n");
 791         return -EINVAL;
 792 }
 793
 794 int usnic_ib_poll_cq(struct ib_cq *ibcq, int num_entries,
 795                                 struct ib_wc *wc)
 796 {
 797         usnic_dbg("\n");
 798         return -EINVAL;
 799 }
 800
 801 int usnic_ib_req_notify_cq(struct ib_cq *cq,
 802                                         enum ib_cq_notify_flags flags)
 803 {
 804         usnic_dbg("\n");
 805         return -EINVAL;
 806 }
 807
 808 struct ib_mr *usnic_ib_get_dma_mr(struct ib_pd *pd, int acc)
 809 {
 810         usnic_dbg("\n");
 811         return ERR_PTR(-ENOMEM);
 812 }
 813
 814
 815 /* In ib callbacks section - End of stub funcs */
 816 /* End of ib callbacks section */