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