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         }
 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         struct ethtool_cmd cmd;
 273         int qp_per_vf;
 274
 275         usnic_dbg("\n");
 276         if (uhw->inlen || uhw->outlen)
 277                 return -EINVAL;
 278
 279         mutex_lock(&us_ibdev->usdev_lock);
 280         us_ibdev->netdev->ethtool_ops->get_drvinfo(us_ibdev->netdev, &info);
 281         us_ibdev->netdev->ethtool_ops->get_settings(us_ibdev->netdev, &cmd);
 282         memset(props, 0, sizeof(*props));
 283         usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr,
 284                         &gid.raw[0]);
 285         memcpy(&props->sys_image_guid, &gid.global.interface_id,
 286                 sizeof(gid.global.interface_id));
 287         usnic_ib_fw_string_to_u64(&info.fw_version[0], &props->fw_ver);
 288         props->max_mr_size = USNIC_UIOM_MAX_MR_SIZE;
 289         props->page_size_cap = USNIC_UIOM_PAGE_SIZE;
 290         props->vendor_id = PCI_VENDOR_ID_CISCO;
 291         props->vendor_part_id = PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC;
 292         props->hw_ver = us_ibdev->pdev->subsystem_device;
 293         qp_per_vf = max(us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_WQ],
 294                         us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_RQ]);
 295         props->max_qp = qp_per_vf *
 296                 atomic_read(&us_ibdev->vf_cnt.refcount);
 297         props->device_cap_flags = IB_DEVICE_PORT_ACTIVE_EVENT |
 298                 IB_DEVICE_SYS_IMAGE_GUID | IB_DEVICE_BLOCK_MULTICAST_LOOPBACK;
 299         props->max_cq = us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_CQ] *
 300                 atomic_read(&us_ibdev->vf_cnt.refcount);
 301         props->max_pd = USNIC_UIOM_MAX_PD_CNT;
 302         props->max_mr = USNIC_UIOM_MAX_MR_CNT;
 303         props->local_ca_ack_delay = 0;
 304         props->max_pkeys = 0;
 305         props->atomic_cap = IB_ATOMIC_NONE;
 306         props->masked_atomic_cap = props->atomic_cap;
 307         props->max_qp_rd_atom = 0;
 308         props->max_qp_init_rd_atom = 0;
 309         props->max_res_rd_atom = 0;
 310         props->max_srq = 0;
 311         props->max_srq_wr = 0;
 312         props->max_srq_sge = 0;
 313         props->max_fast_reg_page_list_len = 0;
 314         props->max_mcast_grp = 0;
 315         props->max_mcast_qp_attach = 0;
 316         props->max_total_mcast_qp_attach = 0;
 317         props->max_map_per_fmr = 0;
 318         /* Owned by Userspace
 319          * max_qp_wr, max_sge, max_sge_rd, max_cqe */
 320         mutex_unlock(&us_ibdev->usdev_lock);
 321
 322         return 0;
 323 }
 324
 325 int usnic_ib_query_port(struct ib_device *ibdev, u8 port,
 326                                 struct ib_port_attr *props)
 327 {
 328         struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
 329         struct ethtool_cmd cmd;
 330
 331         usnic_dbg("\n");
 332
 333         mutex_lock(&us_ibdev->usdev_lock);
 334         us_ibdev->netdev->ethtool_ops->get_settings(us_ibdev->netdev, &cmd);
 335         memset(props, 0, sizeof(*props));
 336
 337         props->lid = 0;
 338         props->lmc = 1;
 339         props->sm_lid = 0;
 340         props->sm_sl = 0;
 341
 342         if (!us_ibdev->ufdev->link_up) {
 343                 props->state = IB_PORT_DOWN;
 344                 props->phys_state = 3;
 345         } else if (!us_ibdev->ufdev->inaddr) {
 346                 props->state = IB_PORT_INIT;
 347                 props->phys_state = 4;
 348         } else {
 349                 props->state = IB_PORT_ACTIVE;
 350                 props->phys_state = 5;
 351         }
 352
 353         props->port_cap_flags = 0;
 354         props->gid_tbl_len = 1;
 355         props->pkey_tbl_len = 1;
 356         props->bad_pkey_cntr = 0;
 357         props->qkey_viol_cntr = 0;
 358         eth_speed_to_ib_speed(cmd.speed, &props->active_speed,
 359                                 &props->active_width);
 360         props->max_mtu = IB_MTU_4096;
 361         props->active_mtu = iboe_get_mtu(us_ibdev->ufdev->mtu);
 362         /* Userspace will adjust for hdrs */
 363         props->max_msg_sz = us_ibdev->ufdev->mtu;
 364         props->max_vl_num = 1;
 365         mutex_unlock(&us_ibdev->usdev_lock);
 366
 367         return 0;
 368 }
 369
 370 int usnic_ib_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
 371                                 int qp_attr_mask,
 372                                 struct ib_qp_init_attr *qp_init_attr)
 373 {
 374         struct usnic_ib_qp_grp *qp_grp;
 375         struct usnic_ib_vf *vf;
 376         int err;
 377
 378         usnic_dbg("\n");
 379
 380         memset(qp_attr, 0, sizeof(*qp_attr));
 381         memset(qp_init_attr, 0, sizeof(*qp_init_attr));
 382
 383         qp_grp = to_uqp_grp(qp);
 384         vf = qp_grp->vf;
 385         mutex_lock(&vf->pf->usdev_lock);
 386         usnic_dbg("\n");
 387         qp_attr->qp_state = qp_grp->state;
 388         qp_attr->cur_qp_state = qp_grp->state;
 389
 390         switch (qp_grp->ibqp.qp_type) {
 391         case IB_QPT_UD:
 392                 qp_attr->qkey = 0;
 393                 break;
 394         default:
 395                 usnic_err("Unexpected qp_type %d\n", qp_grp->ibqp.qp_type);
 396                 err = -EINVAL;
 397                 goto err_out;
 398         }
 399
 400         mutex_unlock(&vf->pf->usdev_lock);
 401         return 0;
 402
 403 err_out:
 404         mutex_unlock(&vf->pf->usdev_lock);
 405         return err;
 406 }
 407
 408 int usnic_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
 409                                 union ib_gid *gid)
 410 {
 411
 412         struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
 413         usnic_dbg("\n");
 414
 415         if (index > 1)
 416                 return -EINVAL;
 417
 418         mutex_lock(&us_ibdev->usdev_lock);
 419         memset(&(gid->raw[0]), 0, sizeof(gid->raw));
 420         usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr,
 421                         &gid->raw[0]);
 422         mutex_unlock(&us_ibdev->usdev_lock);
 423
 424         return 0;
 425 }
 426
 427 int usnic_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
 428                                 u16 *pkey)
 429 {
 430         if (index > 1)
 431                 return -EINVAL;
 432
 433         *pkey = 0xffff;
 434         return 0;
 435 }
 436
 437 struct ib_pd *usnic_ib_alloc_pd(struct ib_device *ibdev,
 438                                         struct ib_ucontext *context,
 439                                         struct ib_udata *udata)
 440 {
 441         struct usnic_ib_pd *pd;
 442         void *umem_pd;
 443
 444         usnic_dbg("\n");
 445
 446         pd = kzalloc(sizeof(*pd), GFP_KERNEL);
 447         if (!pd)
 448                 return ERR_PTR(-ENOMEM);
 449
 450         umem_pd = pd->umem_pd = usnic_uiom_alloc_pd();
 451         if (IS_ERR_OR_NULL(umem_pd)) {
 452                 kfree(pd);
 453                 return ERR_PTR(umem_pd ? PTR_ERR(umem_pd) : -ENOMEM);
 454         }
 455
 456         usnic_info("domain 0x%p allocated for context 0x%p and device %s\n",
 457                         pd, context, ibdev->name);
 458         return &pd->ibpd;
 459 }
 460
 461 int usnic_ib_dealloc_pd(struct ib_pd *pd)
 462 {
 463         usnic_info("freeing domain 0x%p\n", pd);
 464
 465         usnic_uiom_dealloc_pd((to_upd(pd))->umem_pd);
 466         kfree(pd);
 467         return 0;
 468 }
 469
 470 struct ib_qp *usnic_ib_create_qp(struct ib_pd *pd,
 471                                         struct ib_qp_init_attr *init_attr,
 472                                         struct ib_udata *udata)
 473 {
 474         int err;
 475         struct usnic_ib_dev *us_ibdev;
 476         struct usnic_ib_qp_grp *qp_grp;
 477         struct usnic_ib_ucontext *ucontext;
 478         int cq_cnt;
 479         struct usnic_vnic_res_spec res_spec;
 480         struct usnic_ib_create_qp_cmd cmd;
 481         struct usnic_transport_spec trans_spec;
 482
 483         usnic_dbg("\n");
 484
 485         ucontext = to_uucontext(pd->uobject->context);
 486         us_ibdev = to_usdev(pd->device);
 487
 488         if (init_attr->create_flags)
 489                 return ERR_PTR(-EINVAL);
 490
 491         err = ib_copy_from_udata(&cmd, udata, sizeof(cmd));
 492         if (err) {
 493                 usnic_err("%s: cannot copy udata for create_qp\n",
 494                                 us_ibdev->ib_dev.name);
 495                 return ERR_PTR(-EINVAL);
 496         }
 497
 498         err = create_qp_validate_user_data(cmd);
 499         if (err) {
 500                 usnic_err("%s: Failed to validate user data\n",
 501                                 us_ibdev->ib_dev.name);
 502                 return ERR_PTR(-EINVAL);
 503         }
 504
 505         if (init_attr->qp_type != IB_QPT_UD) {
 506                 usnic_err("%s asked to make a non-UD QP: %d\n",
 507                                 us_ibdev->ib_dev.name, init_attr->qp_type);
 508                 return ERR_PTR(-EINVAL);
 509         }
 510
 511         trans_spec = cmd.spec;
 512         mutex_lock(&us_ibdev->usdev_lock);
 513         cq_cnt = (init_attr->send_cq == init_attr->recv_cq) ? 1 : 2;
 514         res_spec = min_transport_spec[trans_spec.trans_type];
 515         usnic_vnic_res_spec_update(&res_spec, USNIC_VNIC_RES_TYPE_CQ, cq_cnt);
 516         qp_grp = find_free_vf_and_create_qp_grp(us_ibdev, to_upd(pd),
 517                                                 &trans_spec,
 518                                                 &res_spec);
 519         if (IS_ERR_OR_NULL(qp_grp)) {
 520                 err = qp_grp ? PTR_ERR(qp_grp) : -ENOMEM;
 521                 goto out_release_mutex;
 522         }
 523
 524         err = usnic_ib_fill_create_qp_resp(qp_grp, udata);
 525         if (err) {
 526                 err = -EBUSY;
 527                 goto out_release_qp_grp;
 528         }
 529
 530         qp_grp->ctx = ucontext;
 531         list_add_tail(&qp_grp->link, &ucontext->qp_grp_list);
 532         usnic_ib_log_vf(qp_grp->vf);
 533         mutex_unlock(&us_ibdev->usdev_lock);
 534         return &qp_grp->ibqp;
 535
 536 out_release_qp_grp:
 537         qp_grp_destroy(qp_grp);
 538 out_release_mutex:
 539         mutex_unlock(&us_ibdev->usdev_lock);
 540         return ERR_PTR(err);
 541 }
 542
 543 int usnic_ib_destroy_qp(struct ib_qp *qp)
 544 {
 545         struct usnic_ib_qp_grp *qp_grp;
 546         struct usnic_ib_vf *vf;
 547
 548         usnic_dbg("\n");
 549
 550         qp_grp = to_uqp_grp(qp);
 551         vf = qp_grp->vf;
 552         mutex_lock(&vf->pf->usdev_lock);
 553         if (usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RESET, NULL)) {
 554                 usnic_err("Failed to move qp grp %u to reset\n",
 555                                 qp_grp->grp_id);
 556         }
 557
 558         list_del(&qp_grp->link);
 559         qp_grp_destroy(qp_grp);
 560         mutex_unlock(&vf->pf->usdev_lock);
 561
 562         return 0;
 563 }
 564
 565 int usnic_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
 566                                 int attr_mask, struct ib_udata *udata)
 567 {
 568         struct usnic_ib_qp_grp *qp_grp;
 569         int status;
 570         usnic_dbg("\n");
 571
 572         qp_grp = to_uqp_grp(ibqp);
 573
 574         /* TODO: Future Support All States */
 575         mutex_lock(&qp_grp->vf->pf->usdev_lock);
 576         if ((attr_mask & IB_QP_STATE) && attr->qp_state == IB_QPS_INIT) {
 577                 status = usnic_ib_qp_grp_modify(qp_grp, IB_QPS_INIT, NULL);
 578         } else if ((attr_mask & IB_QP_STATE) && attr->qp_state == IB_QPS_RTR) {
 579                 status = usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RTR, NULL);
 580         } else if ((attr_mask & IB_QP_STATE) && attr->qp_state == IB_QPS_RTS) {
 581                 status = usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RTS, NULL);
 582         } else {
 583                 usnic_err("Unexpected combination mask: %u state: %u\n",
 584                                 attr_mask & IB_QP_STATE, attr->qp_state);
 585                 status = -EINVAL;
 586         }
 587
 588         mutex_unlock(&qp_grp->vf->pf->usdev_lock);
 589         return status;
 590 }
 591
 592 struct ib_cq *usnic_ib_create_cq(struct ib_device *ibdev,
 593                                  const struct ib_cq_init_attr *attr,
 594                                  struct ib_ucontext *context,
 595                                  struct ib_udata *udata)
 596 {
 597         struct ib_cq *cq;
 598
 599         usnic_dbg("\n");
 600         if (attr->flags)
 601                 return ERR_PTR(-EINVAL);
 602
 603         cq = kzalloc(sizeof(*cq), GFP_KERNEL);
 604         if (!cq)
 605                 return ERR_PTR(-EBUSY);
 606
 607         return cq;
 608 }
 609
 610 int usnic_ib_destroy_cq(struct ib_cq *cq)
 611 {
 612         usnic_dbg("\n");
 613         kfree(cq);
 614         return 0;
 615 }
 616
 617 struct ib_mr *usnic_ib_reg_mr(struct ib_pd *pd, u64 start, u64 length,
 618                                         u64 virt_addr, int access_flags,
 619                                         struct ib_udata *udata)
 620 {
 621         struct usnic_ib_mr *mr;
 622         int err;
 623
 624         usnic_dbg("start 0x%llx va 0x%llx length 0x%llx\n", start,
 625                         virt_addr, length);
 626
 627         mr = kzalloc(sizeof(*mr), GFP_KERNEL);
 628         if (IS_ERR_OR_NULL(mr))
 629                 return ERR_PTR(mr ? PTR_ERR(mr) : -ENOMEM);
 630
 631         mr->umem = usnic_uiom_reg_get(to_upd(pd)->umem_pd, start, length,
 632                                         access_flags, 0);
 633         if (IS_ERR_OR_NULL(mr->umem)) {
 634                 err = mr->umem ? PTR_ERR(mr->umem) : -EFAULT;
 635                 goto err_free;
 636         }
 637
 638         mr->ibmr.lkey = mr->ibmr.rkey = 0;
 639         return &mr->ibmr;
 640
 641 err_free:
 642         kfree(mr);
 643         return ERR_PTR(err);
 644 }
 645
 646 int usnic_ib_dereg_mr(struct ib_mr *ibmr)
 647 {
 648         struct usnic_ib_mr *mr = to_umr(ibmr);
 649
 650         usnic_dbg("va 0x%lx length 0x%zx\n", mr->umem->va, mr->umem->length);
 651
 652         usnic_uiom_reg_release(mr->umem, ibmr->pd->uobject->context->closing);
 653         kfree(mr);
 654         return 0;
 655 }
 656
 657 struct ib_ucontext *usnic_ib_alloc_ucontext(struct ib_device *ibdev,
 658                                                         struct ib_udata *udata)
 659 {
 660         struct usnic_ib_ucontext *context;
 661         struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
 662         usnic_dbg("\n");
 663
 664         context = kmalloc(sizeof(*context), GFP_KERNEL);
 665         if (!context)
 666                 return ERR_PTR(-ENOMEM);
 667
 668         INIT_LIST_HEAD(&context->qp_grp_list);
 669         mutex_lock(&us_ibdev->usdev_lock);
 670         list_add_tail(&context->link, &us_ibdev->ctx_list);
 671         mutex_unlock(&us_ibdev->usdev_lock);
 672
 673         return &context->ibucontext;
 674 }
 675
 676 int usnic_ib_dealloc_ucontext(struct ib_ucontext *ibcontext)
 677 {
 678         struct usnic_ib_ucontext *context = to_uucontext(ibcontext);
 679         struct usnic_ib_dev *us_ibdev = to_usdev(ibcontext->device);
 680         usnic_dbg("\n");
 681
 682         mutex_lock(&us_ibdev->usdev_lock);
 683         BUG_ON(!list_empty(&context->qp_grp_list));
 684         list_del(&context->link);
 685         mutex_unlock(&us_ibdev->usdev_lock);
 686         kfree(context);
 687         return 0;
 688 }
 689
 690 int usnic_ib_mmap(struct ib_ucontext *context,
 691                                 struct vm_area_struct *vma)
 692 {
 693         struct usnic_ib_ucontext *uctx = to_ucontext(context);
 694         struct usnic_ib_dev *us_ibdev;
 695         struct usnic_ib_qp_grp *qp_grp;
 696         struct usnic_ib_vf *vf;
 697         struct vnic_dev_bar *bar;
 698         dma_addr_t bus_addr;
 699         unsigned int len;
 700         unsigned int vfid;
 701
 702         usnic_dbg("\n");
 703
 704         us_ibdev = to_usdev(context->device);
 705         vma->vm_flags |= VM_IO;
 706         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 707         vfid = vma->vm_pgoff;
 708         usnic_dbg("Page Offset %lu PAGE_SHIFT %u VFID %u\n",
 709                         vma->vm_pgoff, PAGE_SHIFT, vfid);
 710
 711         mutex_lock(&us_ibdev->usdev_lock);
 712         list_for_each_entry(qp_grp, &uctx->qp_grp_list, link) {
 713                 vf = qp_grp->vf;
 714                 if (usnic_vnic_get_index(vf->vnic) == vfid) {
 715                         bar = usnic_vnic_get_bar(vf->vnic, 0);
 716                         if ((vma->vm_end - vma->vm_start) != bar->len) {
 717                                 usnic_err("Bar0 Len %lu - Request map %lu\n",
 718                                                 bar->len,
 719                                                 vma->vm_end - vma->vm_start);
 720                                 mutex_unlock(&us_ibdev->usdev_lock);
 721                                 return -EINVAL;
 722                         }
 723                         bus_addr = bar->bus_addr;
 724                         len = bar->len;
 725                         usnic_dbg("bus: %pa vaddr: %p size: %ld\n",
 726                                         &bus_addr, bar->vaddr, bar->len);
 727                         mutex_unlock(&us_ibdev->usdev_lock);
 728
 729                         return remap_pfn_range(vma,
 730                                                 vma->vm_start,
 731                                                 bus_addr >> PAGE_SHIFT,
 732                                                 len, vma->vm_page_prot);
 733                 }
 734         }
 735
 736         mutex_unlock(&us_ibdev->usdev_lock);
 737         usnic_err("No VF %u found\n", vfid);
 738         return -EINVAL;
 739 }
 740
 741 /* In ib callbacks section -  Start of stub funcs */
 742 struct ib_ah *usnic_ib_create_ah(struct ib_pd *pd,
 743                                         struct ib_ah_attr *ah_attr)
 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 */