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