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_fwd.h"
  46 #include "usnic_log.h"
  47 #include "usnic_uiom.h"
  48 #include "usnic_transport.h"
  49
  50 #define USNIC_DEFAULT_TRANSPORT USNIC_TRANSPORT_ROCE_CUSTOM
  51
  52 static void usnic_ib_fw_string_to_u64(char *fw_ver_str, u64 *fw_ver)
  53 {
  54         *fw_ver = *((u64 *)fw_ver_str);
  55 }
  56
  57 static int usnic_ib_fill_create_qp_resp(struct usnic_ib_qp_grp *qp_grp,
  58                                         struct ib_udata *udata)
  59 {
  60         struct usnic_ib_dev *us_ibdev;
  61         struct usnic_ib_create_qp_resp resp;
  62         struct pci_dev *pdev;
  63         struct vnic_dev_bar *bar;
  64         struct usnic_vnic_res_chunk *chunk;
  65         struct usnic_ib_qp_grp_flow *default_flow;
  66         int i, err;
  67
  68         memset(&resp, 0, sizeof(resp));
  69
  70         us_ibdev = qp_grp->vf->pf;
  71         pdev = usnic_vnic_get_pdev(qp_grp->vf->vnic);
  72         if (!pdev) {
  73                 usnic_err("Failed to get pdev of qp_grp %d\n",
  74                                 qp_grp->grp_id);
  75                 return -EFAULT;
  76         }
  77
  78         bar = usnic_vnic_get_bar(qp_grp->vf->vnic, 0);
  79         if (!bar) {
  80                 usnic_err("Failed to get bar0 of qp_grp %d vf %s",
  81                                 qp_grp->grp_id, pci_name(pdev));
  82                 return -EFAULT;
  83         }
  84
  85         resp.vfid = usnic_vnic_get_index(qp_grp->vf->vnic);
  86         resp.bar_bus_addr = bar->bus_addr;
  87         resp.bar_len = bar->len;
  88
  89         chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_RQ);
  90         if (IS_ERR_OR_NULL(chunk)) {
  91                 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
  92                         usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_RQ),
  93                         qp_grp->grp_id,
  94                         PTR_ERR(chunk));
  95                 return chunk ? PTR_ERR(chunk) : -ENOMEM;
  96         }
  97
  98         WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_RQ);
  99         resp.rq_cnt = chunk->cnt;
 100         for (i = 0; i < chunk->cnt; i++)
 101                 resp.rq_idx[i] = chunk->res[i]->vnic_idx;
 102
 103         chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_WQ);
 104         if (IS_ERR_OR_NULL(chunk)) {
 105                 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
 106                         usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_WQ),
 107                         qp_grp->grp_id,
 108                         PTR_ERR(chunk));
 109                 return chunk ? PTR_ERR(chunk) : -ENOMEM;
 110         }
 111
 112         WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_WQ);
 113         resp.wq_cnt = chunk->cnt;
 114         for (i = 0; i < chunk->cnt; i++)
 115                 resp.wq_idx[i] = chunk->res[i]->vnic_idx;
 116
 117         chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_CQ);
 118         if (IS_ERR_OR_NULL(chunk)) {
 119                 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
 120                         usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_CQ),
 121                         qp_grp->grp_id,
 122                         PTR_ERR(chunk));
 123                 return chunk ? PTR_ERR(chunk) : -ENOMEM;
 124         }
 125
 126         WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_CQ);
 127         resp.cq_cnt = chunk->cnt;
 128         for (i = 0; i < chunk->cnt; i++)
 129                 resp.cq_idx[i] = chunk->res[i]->vnic_idx;
 130
 131         default_flow = list_first_entry(&qp_grp->flows_lst,
 132                                         struct usnic_ib_qp_grp_flow, link);
 133         resp.transport = default_flow->trans_type;
 134
 135         err = ib_copy_to_udata(udata, &resp, sizeof(resp));
 136         if (err) {
 137                 usnic_err("Failed to copy udata for %s", us_ibdev->ib_dev.name);
 138                 return err;
 139         }
 140
 141         return 0;
 142 }
 143
 144 static struct usnic_ib_qp_grp*
 145 find_free_vf_and_create_qp_grp(struct usnic_ib_dev *us_ibdev,
 146                                 struct usnic_ib_pd *pd,
 147                                 struct usnic_transport_spec *trans_spec,
 148                                 struct usnic_vnic_res_spec *res_spec)
 149 {
 150         struct usnic_ib_vf *vf;
 151         struct usnic_vnic *vnic;
 152         struct usnic_ib_qp_grp *qp_grp;
 153         struct device *dev, **dev_list;
 154         int i, found = 0;
 155
 156         BUG_ON(!mutex_is_locked(&us_ibdev->usdev_lock));
 157
 158         if (list_empty(&us_ibdev->vf_dev_list)) {
 159                 usnic_info("No vfs to allocate\n");
 160                 return NULL;
 161         }
 162
 163         if (usnic_ib_share_vf) {
 164                 /* Try to find resouces on a used vf which is in pd */
 165                 dev_list = usnic_uiom_get_dev_list(pd->umem_pd);
 166                 for (i = 0; dev_list[i]; i++) {
 167                         dev = dev_list[i];
 168                         vf = pci_get_drvdata(to_pci_dev(dev));
 169                         spin_lock(&vf->lock);
 170                         vnic = vf->vnic;
 171                         if (!usnic_vnic_check_room(vnic, res_spec)) {
 172                                 usnic_dbg("Found used vnic %s from %s\n",
 173                                                 us_ibdev->ib_dev.name,
 174                                                 pci_name(usnic_vnic_get_pdev(
 175                                                                         vnic)));
 176                                 found = 1;
 177                                 break;
 178                         }
 179                         spin_unlock(&vf->lock);
 180
 181                 }
 182                 usnic_uiom_free_dev_list(dev_list);
 183                 dev_list = NULL;
 184         }
 185
 186         if (!found) {
 187                 /* Try to find resources on an unused vf */
 188                 list_for_each_entry(vf, &us_ibdev->vf_dev_list, link) {
 189                         spin_lock(&vf->lock);
 190                         vnic = vf->vnic;
 191                         if (vf->qp_grp_ref_cnt == 0 &&
 192                                 usnic_vnic_check_room(vnic, res_spec) == 0) {
 193                                 found = 1;
 194                                 break;
 195                         }
 196                         spin_unlock(&vf->lock);
 197                 }
 198         }
 199
 200         if (!found) {
 201                 usnic_info("No free qp grp found on %s\n",
 202                                 us_ibdev->ib_dev.name);
 203                 return ERR_PTR(-ENOMEM);
 204         }
 205
 206         qp_grp = usnic_ib_qp_grp_create(us_ibdev->ufdev, vf, pd, res_spec,
 207                                                 trans_spec);
 208         spin_unlock(&vf->lock);
 209         if (IS_ERR_OR_NULL(qp_grp)) {
 210                 usnic_err("Failed to allocate qp_grp\n");
 211                 if (usnic_ib_share_vf)
 212                         usnic_uiom_free_dev_list(dev_list);
 213                 return ERR_PTR(qp_grp ? PTR_ERR(qp_grp) : -ENOMEM);
 214         }
 215
 216         return qp_grp;
 217 }
 218
 219 static void qp_grp_destroy(struct usnic_ib_qp_grp *qp_grp)
 220 {
 221         struct usnic_ib_vf *vf = qp_grp->vf;
 222
 223         WARN_ON(qp_grp->state != IB_QPS_RESET);
 224
 225         spin_lock(&vf->lock);
 226         usnic_ib_qp_grp_destroy(qp_grp);
 227         spin_unlock(&vf->lock);
 228 }
 229
 230 static void eth_speed_to_ib_speed(int speed, u8 *active_speed,
 231                                         u8 *active_width)
 232 {
 233         if (speed <= 10000) {
 234                 *active_width = IB_WIDTH_1X;
 235                 *active_speed = IB_SPEED_FDR10;
 236         } else if (speed <= 20000) {
 237                 *active_width = IB_WIDTH_4X;
 238                 *active_speed = IB_SPEED_DDR;
 239         } else if (speed <= 30000) {
 240                 *active_width = IB_WIDTH_4X;
 241                 *active_speed = IB_SPEED_QDR;
 242         } else if (speed <= 40000) {
 243                 *active_width = IB_WIDTH_4X;
 244                 *active_speed = IB_SPEED_FDR10;
 245         } else {
 246                 *active_width = IB_WIDTH_4X;
 247                 *active_speed = IB_SPEED_EDR;
 248         }
 249 }
 250
 251 static int create_qp_validate_user_data(struct usnic_ib_create_qp_cmd cmd)
 252 {
 253         if (cmd.spec.trans_type <= USNIC_TRANSPORT_UNKNOWN ||
 254                         cmd.spec.trans_type >= USNIC_TRANSPORT_MAX)
 255                 return -EINVAL;
 256
 257         return 0;
 258 }
 259
 260 /* Start of ib callback functions */
 261
 262 enum rdma_link_layer usnic_ib_port_link_layer(struct ib_device *device,
 263                                                 u8 port_num)
 264 {
 265         return IB_LINK_LAYER_ETHERNET;
 266 }
 267
 268 int usnic_ib_query_device(struct ib_device *ibdev,
 269                           struct ib_device_attr *props,
 270                           struct ib_udata *uhw)
 271 {
 272         struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
 273         union ib_gid gid;
 274         struct ethtool_drvinfo info;
 275         int qp_per_vf;
 276
 277         usnic_dbg("\n");
 278         if (uhw->inlen || uhw->outlen)
 279                 return -EINVAL;
 280
 281         mutex_lock(&us_ibdev->usdev_lock);
 282         us_ibdev->netdev->ethtool_ops->get_drvinfo(us_ibdev->netdev, &info);
 283         memset(props, 0, sizeof(*props));
 284         usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr,
 285                         &gid.raw[0]);
 286         memcpy(&props->sys_image_guid, &gid.global.interface_id,
 287                 sizeof(gid.global.interface_id));
 288         usnic_ib_fw_string_to_u64(&info.fw_version[0], &props->fw_ver);
 289         props->max_mr_size = USNIC_UIOM_MAX_MR_SIZE;
 290         props->page_size_cap = USNIC_UIOM_PAGE_SIZE;
 291         props->vendor_id = PCI_VENDOR_ID_CISCO;
 292         props->vendor_part_id = PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC;
 293         props->hw_ver = us_ibdev->pdev->subsystem_device;
 294         qp_per_vf = max(us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_WQ],
 295                         us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_RQ]);
 296         props->max_qp = qp_per_vf *
 297                 atomic_read(&us_ibdev->vf_cnt.refcount);
 298         props->device_cap_flags = IB_DEVICE_PORT_ACTIVE_EVENT |
 299                 IB_DEVICE_SYS_IMAGE_GUID | IB_DEVICE_BLOCK_MULTICAST_LOOPBACK;
 300         props->max_cq = us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_CQ] *
 301                 atomic_read(&us_ibdev->vf_cnt.refcount);
 302         props->max_pd = USNIC_UIOM_MAX_PD_CNT;
 303         props->max_mr = USNIC_UIOM_MAX_MR_CNT;
 304         props->local_ca_ack_delay = 0;
 305         props->max_pkeys = 0;
 306         props->atomic_cap = IB_ATOMIC_NONE;
 307         props->masked_atomic_cap = props->atomic_cap;
 308         props->max_qp_rd_atom = 0;
 309         props->max_qp_init_rd_atom = 0;
 310         props->max_res_rd_atom = 0;
 311         props->max_srq = 0;
 312         props->max_srq_wr = 0;
 313         props->max_srq_sge = 0;
 314         props->max_fast_reg_page_list_len = 0;
 315         props->max_mcast_grp = 0;
 316         props->max_mcast_qp_attach = 0;
 317         props->max_total_mcast_qp_attach = 0;
 318         props->max_map_per_fmr = 0;
 319         /* Owned by Userspace
 320          * max_qp_wr, max_sge, max_sge_rd, max_cqe */
 321         mutex_unlock(&us_ibdev->usdev_lock);
 322
 323         return 0;
 324 }
 325
 326 int usnic_ib_query_port(struct ib_device *ibdev, u8 port,
 327                                 struct ib_port_attr *props)
 328 {
 329         struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
 330         struct ethtool_link_ksettings cmd;
 331
 332         usnic_dbg("\n");
 333
 334         mutex_lock(&us_ibdev->usdev_lock);
 335         __ethtool_get_link_ksettings(us_ibdev->netdev, &cmd);
 336         memset(props, 0, sizeof(*props));
 337
 338         props->lid = 0;
 339         props->lmc = 1;
 340         props->sm_lid = 0;
 341         props->sm_sl = 0;
 342
 343         if (!us_ibdev->ufdev->link_up) {
 344                 props->state = IB_PORT_DOWN;
 345                 props->phys_state = 3;
 346         } else if (!us_ibdev->ufdev->inaddr) {
 347                 props->state = IB_PORT_INIT;
 348                 props->phys_state = 4;
 349         } else {
 350                 props->state = IB_PORT_ACTIVE;
 351                 props->phys_state = 5;
 352         }
 353
 354         props->port_cap_flags = 0;
 355         props->gid_tbl_len = 1;
 356         props->pkey_tbl_len = 1;
 357         props->bad_pkey_cntr = 0;
 358         props->qkey_viol_cntr = 0;
 359         eth_speed_to_ib_speed(cmd.base.speed, &props->active_speed,
 360                               &props->active_width);
 361         props->max_mtu = IB_MTU_4096;
 362         props->active_mtu = iboe_get_mtu(us_ibdev->ufdev->mtu);
 363         /* Userspace will adjust for hdrs */
 364         props->max_msg_sz = us_ibdev->ufdev->mtu;
 365         props->max_vl_num = 1;
 366         mutex_unlock(&us_ibdev->usdev_lock);
 367
 368         return 0;
 369 }
 370
 371 int usnic_ib_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
 372                                 int qp_attr_mask,
 373                                 struct ib_qp_init_attr *qp_init_attr)
 374 {
 375         struct usnic_ib_qp_grp *qp_grp;
 376         struct usnic_ib_vf *vf;
 377         int err;
 378
 379         usnic_dbg("\n");
 380
 381         memset(qp_attr, 0, sizeof(*qp_attr));
 382         memset(qp_init_attr, 0, sizeof(*qp_init_attr));
 383
 384         qp_grp = to_uqp_grp(qp);
 385         vf = qp_grp->vf;
 386         mutex_lock(&vf->pf->usdev_lock);
 387         usnic_dbg("\n");
 388         qp_attr->qp_state = qp_grp->state;
 389         qp_attr->cur_qp_state = qp_grp->state;
 390
 391         switch (qp_grp->ibqp.qp_type) {
 392         case IB_QPT_UD:
 393                 qp_attr->qkey = 0;
 394                 break;
 395         default:
 396                 usnic_err("Unexpected qp_type %d\n", qp_grp->ibqp.qp_type);
 397                 err = -EINVAL;
 398                 goto err_out;
 399         }
 400
 401         mutex_unlock(&vf->pf->usdev_lock);
 402         return 0;
 403
 404 err_out:
 405         mutex_unlock(&vf->pf->usdev_lock);
 406         return err;
 407 }
 408
 409 int usnic_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
 410                                 union ib_gid *gid)
 411 {
 412
 413         struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
 414         usnic_dbg("\n");
 415
 416         if (index > 1)
 417                 return -EINVAL;
 418
 419         mutex_lock(&us_ibdev->usdev_lock);
 420         memset(&(gid->raw[0]), 0, sizeof(gid->raw));
 421         usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr,
 422                         &gid->raw[0]);
 423         mutex_unlock(&us_ibdev->usdev_lock);
 424
 425         return 0;
 426 }
 427
 428 int usnic_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
 429                                 u16 *pkey)
 430 {
 431         if (index > 0)
 432                 return -EINVAL;
 433
 434         *pkey = 0xffff;
 435         return 0;
 436 }
 437
 438 struct ib_pd *usnic_ib_alloc_pd(struct ib_device *ibdev,
 439                                         struct ib_ucontext *context,
 440                                         struct ib_udata *udata)
 441 {
 442         struct usnic_ib_pd *pd;
 443         void *umem_pd;
 444
 445         usnic_dbg("\n");
 446
 447         pd = kzalloc(sizeof(*pd), GFP_KERNEL);
 448         if (!pd)
 449                 return ERR_PTR(-ENOMEM);
 450
 451         umem_pd = pd->umem_pd = usnic_uiom_alloc_pd();
 452         if (IS_ERR_OR_NULL(umem_pd)) {
 453                 kfree(pd);
 454                 return ERR_PTR(umem_pd ? PTR_ERR(umem_pd) : -ENOMEM);
 455         }
 456
 457         usnic_info("domain 0x%p allocated for context 0x%p and device %s\n",
 458                         pd, context, ibdev->name);
 459         return &pd->ibpd;
 460 }
 461
 462 int usnic_ib_dealloc_pd(struct ib_pd *pd)
 463 {
 464         usnic_info("freeing domain 0x%p\n", pd);
 465
 466         usnic_uiom_dealloc_pd((to_upd(pd))->umem_pd);
 467         kfree(pd);
 468         return 0;
 469 }
 470
 471 struct ib_qp *usnic_ib_create_qp(struct ib_pd *pd,
 472                                         struct ib_qp_init_attr *init_attr,
 473                                         struct ib_udata *udata)
 474 {
 475         int err;
 476         struct usnic_ib_dev *us_ibdev;
 477         struct usnic_ib_qp_grp *qp_grp;
 478         struct usnic_ib_ucontext *ucontext;
 479         int cq_cnt;
 480         struct usnic_vnic_res_spec res_spec;
 481         struct usnic_ib_create_qp_cmd cmd;
 482         struct usnic_transport_spec trans_spec;
 483
 484         usnic_dbg("\n");
 485
 486         ucontext = to_uucontext(pd->uobject->context);
 487         us_ibdev = to_usdev(pd->device);
 488
 489         if (init_attr->create_flags)
 490                 return ERR_PTR(-EINVAL);
 491
 492         err = ib_copy_from_udata(&cmd, udata, sizeof(cmd));
 493         if (err) {
 494                 usnic_err("%s: cannot copy udata for create_qp\n",
 495                                 us_ibdev->ib_dev.name);
 496                 return ERR_PTR(-EINVAL);
 497         }
 498
 499         err = create_qp_validate_user_data(cmd);
 500         if (err) {
 501                 usnic_err("%s: Failed to validate user data\n",
 502                                 us_ibdev->ib_dev.name);
 503                 return ERR_PTR(-EINVAL);
 504         }
 505
 506         if (init_attr->qp_type != IB_QPT_UD) {
 507                 usnic_err("%s asked to make a non-UD QP: %d\n",
 508                                 us_ibdev->ib_dev.name, init_attr->qp_type);
 509                 return ERR_PTR(-EINVAL);
 510         }
 511
 512         trans_spec = cmd.spec;
 513         mutex_lock(&us_ibdev->usdev_lock);
 514         cq_cnt = (init_attr->send_cq == init_attr->recv_cq) ? 1 : 2;
 515         res_spec = min_transport_spec[trans_spec.trans_type];
 516         usnic_vnic_res_spec_update(&res_spec, USNIC_VNIC_RES_TYPE_CQ, cq_cnt);
 517         qp_grp = find_free_vf_and_create_qp_grp(us_ibdev, to_upd(pd),
 518                                                 &trans_spec,
 519                                                 &res_spec);
 520         if (IS_ERR_OR_NULL(qp_grp)) {
 521                 err = qp_grp ? PTR_ERR(qp_grp) : -ENOMEM;
 522                 goto out_release_mutex;
 523         }
 524
 525         err = usnic_ib_fill_create_qp_resp(qp_grp, udata);
 526         if (err) {
 527                 err = -EBUSY;
 528                 goto out_release_qp_grp;
 529         }
 530
 531         qp_grp->ctx = ucontext;
 532         list_add_tail(&qp_grp->link, &ucontext->qp_grp_list);
 533         usnic_ib_log_vf(qp_grp->vf);
 534         mutex_unlock(&us_ibdev->usdev_lock);
 535         return &qp_grp->ibqp;
 536
 537 out_release_qp_grp:
 538         qp_grp_destroy(qp_grp);
 539 out_release_mutex:
 540         mutex_unlock(&us_ibdev->usdev_lock);
 541         return ERR_PTR(err);
 542 }
 543
 544 int usnic_ib_destroy_qp(struct ib_qp *qp)
 545 {
 546         struct usnic_ib_qp_grp *qp_grp;
 547         struct usnic_ib_vf *vf;
 548
 549         usnic_dbg("\n");
 550
 551         qp_grp = to_uqp_grp(qp);
 552         vf = qp_grp->vf;
 553         mutex_lock(&vf->pf->usdev_lock);
 554         if (usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RESET, NULL)) {
 555                 usnic_err("Failed to move qp grp %u to reset\n",
 556                                 qp_grp->grp_id);
 557         }
 558
 559         list_del(&qp_grp->link);
 560         qp_grp_destroy(qp_grp);
 561         mutex_unlock(&vf->pf->usdev_lock);
 562
 563         return 0;
 564 }
 565
 566 int usnic_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
 567                                 int attr_mask, struct ib_udata *udata)
 568 {
 569         struct usnic_ib_qp_grp *qp_grp;
 570         int status;
 571         usnic_dbg("\n");
 572
 573         qp_grp = to_uqp_grp(ibqp);
 574
 575         mutex_lock(&qp_grp->vf->pf->usdev_lock);
 576         if ((attr_mask & IB_QP_PORT) && attr->port_num != 1) {
 577                 /* usnic devices only have one port */
 578                 status = -EINVAL;
 579                 goto out_unlock;
 580         }
 581         if (attr_mask & IB_QP_STATE) {
 582                 status = usnic_ib_qp_grp_modify(qp_grp, attr->qp_state, NULL);
 583         } else {
 584                 usnic_err("Unhandled request, attr_mask=0x%x\n", attr_mask);
 585                 status = -EINVAL;
 586         }
 587
 588 out_unlock:
 589         mutex_unlock(&qp_grp->vf->pf->usdev_lock);
 590         return status;
 591 }
 592
 593 struct ib_cq *usnic_ib_create_cq(struct ib_device *ibdev,
 594                                  const struct ib_cq_init_attr *attr,
 595                                  struct ib_ucontext *context,
 596                                  struct ib_udata *udata)
 597 {
 598         struct ib_cq *cq;
 599
 600         usnic_dbg("\n");
 601         if (attr->flags)
 602                 return ERR_PTR(-EINVAL);
 603
 604         cq = kzalloc(sizeof(*cq), GFP_KERNEL);
 605         if (!cq)
 606                 return ERR_PTR(-EBUSY);
 607
 608         return cq;
 609 }
 610
 611 int usnic_ib_destroy_cq(struct ib_cq *cq)
 612 {
 613         usnic_dbg("\n");
 614         kfree(cq);
 615         return 0;
 616 }
 617
 618 struct ib_mr *usnic_ib_reg_mr(struct ib_pd *pd, u64 start, u64 length,
 619                                         u64 virt_addr, int access_flags,
 620                                         struct ib_udata *udata)
 621 {
 622         struct usnic_ib_mr *mr;
 623         int err;
 624
 625         usnic_dbg("start 0x%llx va 0x%llx length 0x%llx\n", start,
 626                         virt_addr, length);
 627
 628         mr = kzalloc(sizeof(*mr), GFP_KERNEL);
 629         if (!mr)
 630                 return ERR_PTR(-ENOMEM);
 631
 632         mr->umem = usnic_uiom_reg_get(to_upd(pd)->umem_pd, start, length,
 633                                         access_flags, 0);
 634         if (IS_ERR_OR_NULL(mr->umem)) {
 635                 err = mr->umem ? PTR_ERR(mr->umem) : -EFAULT;
 636                 goto err_free;
 637         }
 638
 639         mr->ibmr.lkey = mr->ibmr.rkey = 0;
 640         return &mr->ibmr;
 641
 642 err_free:
 643         kfree(mr);
 644         return ERR_PTR(err);
 645 }
 646
 647 int usnic_ib_dereg_mr(struct ib_mr *ibmr)
 648 {
 649         struct usnic_ib_mr *mr = to_umr(ibmr);
 650
 651         usnic_dbg("va 0x%lx length 0x%zx\n", mr->umem->va, mr->umem->length);
 652
 653         usnic_uiom_reg_release(mr->umem, ibmr->pd->uobject->context->closing);
 654         kfree(mr);
 655         return 0;
 656 }
 657
 658 struct ib_ucontext *usnic_ib_alloc_ucontext(struct ib_device *ibdev,
 659                                                         struct ib_udata *udata)
 660 {
 661         struct usnic_ib_ucontext *context;
 662         struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
 663         usnic_dbg("\n");
 664
 665         context = kmalloc(sizeof(*context), GFP_KERNEL);
 666         if (!context)
 667                 return ERR_PTR(-ENOMEM);
 668
 669         INIT_LIST_HEAD(&context->qp_grp_list);
 670         mutex_lock(&us_ibdev->usdev_lock);
 671         list_add_tail(&context->link, &us_ibdev->ctx_list);
 672         mutex_unlock(&us_ibdev->usdev_lock);
 673
 674         return &context->ibucontext;
 675 }
 676
 677 int usnic_ib_dealloc_ucontext(struct ib_ucontext *ibcontext)
 678 {
 679         struct usnic_ib_ucontext *context = to_uucontext(ibcontext);
 680         struct usnic_ib_dev *us_ibdev = to_usdev(ibcontext->device);
 681         usnic_dbg("\n");
 682
 683         mutex_lock(&us_ibdev->usdev_lock);
 684         BUG_ON(!list_empty(&context->qp_grp_list));
 685         list_del(&context->link);
 686         mutex_unlock(&us_ibdev->usdev_lock);
 687         kfree(context);
 688         return 0;
 689 }
 690
 691 int usnic_ib_mmap(struct ib_ucontext *context,
 692                                 struct vm_area_struct *vma)
 693 {
 694         struct usnic_ib_ucontext *uctx = to_ucontext(context);
 695         struct usnic_ib_dev *us_ibdev;
 696         struct usnic_ib_qp_grp *qp_grp;
 697         struct usnic_ib_vf *vf;
 698         struct vnic_dev_bar *bar;
 699         dma_addr_t bus_addr;
 700         unsigned int len;
 701         unsigned int vfid;
 702
 703         usnic_dbg("\n");
 704
 705         us_ibdev = to_usdev(context->device);
 706         vma->vm_flags |= VM_IO;
 707         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 708         vfid = vma->vm_pgoff;
 709         usnic_dbg("Page Offset %lu PAGE_SHIFT %u VFID %u\n",
 710                         vma->vm_pgoff, PAGE_SHIFT, vfid);
 711
 712         mutex_lock(&us_ibdev->usdev_lock);
 713         list_for_each_entry(qp_grp, &uctx->qp_grp_list, link) {
 714                 vf = qp_grp->vf;
 715                 if (usnic_vnic_get_index(vf->vnic) == vfid) {
 716                         bar = usnic_vnic_get_bar(vf->vnic, 0);
 717                         if ((vma->vm_end - vma->vm_start) != bar->len) {
 718                                 usnic_err("Bar0 Len %lu - Request map %lu\n",
 719                                                 bar->len,
 720                                                 vma->vm_end - vma->vm_start);
 721                                 mutex_unlock(&us_ibdev->usdev_lock);
 722                                 return -EINVAL;
 723                         }
 724                         bus_addr = bar->bus_addr;
 725                         len = bar->len;
 726                         usnic_dbg("bus: %pa vaddr: %p size: %ld\n",
 727                                         &bus_addr, bar->vaddr, bar->len);
 728                         mutex_unlock(&us_ibdev->usdev_lock);
 729
 730                         return remap_pfn_range(vma,
 731                                                 vma->vm_start,
 732                                                 bus_addr >> PAGE_SHIFT,
 733                                                 len, vma->vm_page_prot);
 734                 }
 735         }
 736
 737         mutex_unlock(&us_ibdev->usdev_lock);
 738         usnic_err("No VF %u found\n", vfid);
 739         return -EINVAL;
 740 }
 741
 742 /* In ib callbacks section -  Start of stub funcs */
 743 struct ib_ah *usnic_ib_create_ah(struct ib_pd *pd,
 744                                         struct ib_ah_attr *ah_attr)
 745 {
 746         usnic_dbg("\n");
 747         return ERR_PTR(-EPERM);
 748 }
 749
 750 int usnic_ib_destroy_ah(struct ib_ah *ah)
 751 {
 752         usnic_dbg("\n");
 753         return -EINVAL;
 754 }
 755
 756 int usnic_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
 757                                 struct ib_send_wr **bad_wr)
 758 {
 759         usnic_dbg("\n");
 760         return -EINVAL;
 761 }
 762
 763 int usnic_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
 764                                 struct ib_recv_wr **bad_wr)
 765 {
 766         usnic_dbg("\n");
 767         return -EINVAL;
 768 }
 769
 770 int usnic_ib_poll_cq(struct ib_cq *ibcq, int num_entries,
 771                                 struct ib_wc *wc)
 772 {
 773         usnic_dbg("\n");
 774         return -EINVAL;
 775 }
 776
 777 int usnic_ib_req_notify_cq(struct ib_cq *cq,
 778                                         enum ib_cq_notify_flags flags)
 779 {
 780         usnic_dbg("\n");
 781         return -EINVAL;
 782 }
 783
 784 struct ib_mr *usnic_ib_get_dma_mr(struct ib_pd *pd, int acc)
 785 {
 786         usnic_dbg("\n");
 787         return ERR_PTR(-ENOMEM);
 788 }
 789
 790
 791 /* In ib callbacks section - End of stub funcs */
 792 /* End of ib callbacks section */