drivers/infiniband/hw/usnic/usnic_ib_verbs.c

   1 /*
   2  * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
   3  *
   4  * This program is free software; you may redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; version 2 of the License.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   9  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  10  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  11  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  12  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  13  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  14  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  15  * SOFTWARE.
  16  *
  17  */
  18 #include <linux/module.h>
  19 #include <linux/init.h>
  20 #include <linux/slab.h>
  21 #include <linux/errno.h>
  22
  23 #include <rdma/ib_user_verbs.h>
  24 #include <rdma/ib_addr.h>
  25
  26 #include "usnic_abi.h"
  27 #include "usnic_ib.h"
  28 #include "usnic_common_util.h"
  29 #include "usnic_ib_qp_grp.h"
  30 #include "usnic_fwd.h"
  31 #include "usnic_log.h"
  32 #include "usnic_uiom.h"
  33 #include "usnic_transport.h"
  34
  35 #define USNIC_DEFAULT_TRANSPORT USNIC_TRANSPORT_ROCE_CUSTOM
  36
  37 static void usnic_ib_fw_string_to_u64(char *fw_ver_str, u64 *fw_ver)
  38 {
  39         *fw_ver = (u64) *fw_ver_str;
  40 }
  41
  42 static int usnic_ib_fill_create_qp_resp(struct usnic_ib_qp_grp *qp_grp,
  43                                         struct ib_udata *udata)
  44 {
  45         struct usnic_ib_dev *us_ibdev;
  46         struct usnic_ib_create_qp_resp resp;
  47         struct pci_dev *pdev;
  48         struct vnic_dev_bar *bar;
  49         struct usnic_vnic_res_chunk *chunk;
  50         struct usnic_ib_qp_grp_flow *default_flow;
  51         int i, err;
  52
  53         memset(&resp, 0, sizeof(resp));
  54
  55         us_ibdev = qp_grp->vf->pf;
  56         pdev = usnic_vnic_get_pdev(qp_grp->vf->vnic);
  57         if (!pdev) {
  58                 usnic_err("Failed to get pdev of qp_grp %d\n",
  59                                 qp_grp->grp_id);
  60                 return -EFAULT;
  61         }
  62
  63         bar = usnic_vnic_get_bar(qp_grp->vf->vnic, 0);
  64         if (!bar) {
  65                 usnic_err("Failed to get bar0 of qp_grp %d vf %s",
  66                                 qp_grp->grp_id, pci_name(pdev));
  67                 return -EFAULT;
  68         }
  69
  70         resp.vfid = usnic_vnic_get_index(qp_grp->vf->vnic);
  71         resp.bar_bus_addr = bar->bus_addr;
  72         resp.bar_len = bar->len;
  73
  74         chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_RQ);
  75         if (IS_ERR_OR_NULL(chunk)) {
  76                 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
  77                         usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_RQ),
  78                         qp_grp->grp_id,
  79                         PTR_ERR(chunk));
  80                 return chunk ? PTR_ERR(chunk) : -ENOMEM;
  81         }
  82
  83         WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_RQ);
  84         resp.rq_cnt = chunk->cnt;
  85         for (i = 0; i < chunk->cnt; i++)
  86                 resp.rq_idx[i] = chunk->res[i]->vnic_idx;
  87
  88         chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_WQ);
  89         if (IS_ERR_OR_NULL(chunk)) {
  90                 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
  91                         usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_WQ),
  92                         qp_grp->grp_id,
  93                         PTR_ERR(chunk));
  94                 return chunk ? PTR_ERR(chunk) : -ENOMEM;
  95         }
  96
  97         WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_WQ);
  98         resp.wq_cnt = chunk->cnt;
  99         for (i = 0; i < chunk->cnt; i++)
 100                 resp.wq_idx[i] = chunk->res[i]->vnic_idx;
 101
 102         chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_CQ);
 103         if (IS_ERR_OR_NULL(chunk)) {
 104                 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
 105                         usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_CQ),
 106                         qp_grp->grp_id,
 107                         PTR_ERR(chunk));
 108                 return chunk ? PTR_ERR(chunk) : -ENOMEM;
 109         }
 110
 111         WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_CQ);
 112         resp.cq_cnt = chunk->cnt;
 113         for (i = 0; i < chunk->cnt; i++)
 114                 resp.cq_idx[i] = chunk->res[i]->vnic_idx;
 115
 116         default_flow = list_first_entry(&qp_grp->flows_lst,
 117                                         struct usnic_ib_qp_grp_flow, link);
 118         resp.transport = default_flow->trans_type;
 119
 120         err = ib_copy_to_udata(udata, &resp, sizeof(resp));
 121         if (err) {
 122                 usnic_err("Failed to copy udata for %s", us_ibdev->ib_dev.name);
 123                 return err;
 124         }
 125
 126         return 0;
 127 }
 128
 129 static struct usnic_ib_qp_grp*
 130 find_free_vf_and_create_qp_grp(struct usnic_ib_dev *us_ibdev,
 131                                 struct usnic_ib_pd *pd,
 132                                 struct usnic_transport_spec *trans_spec,
 133                                 struct usnic_vnic_res_spec *res_spec)
 134 {
 135         struct usnic_ib_vf *vf;
 136         struct usnic_vnic *vnic;
 137         struct usnic_ib_qp_grp *qp_grp;
 138         struct device *dev, **dev_list;
 139         int i, found = 0;
 140
 141         BUG_ON(!mutex_is_locked(&us_ibdev->usdev_lock));
 142
 143         if (list_empty(&us_ibdev->vf_dev_list)) {
 144                 usnic_info("No vfs to allocate\n");
 145                 return NULL;
 146         }
 147
 148         if (usnic_ib_share_vf) {
 149                 /* Try to find resouces on a used vf which is in pd */
 150                 dev_list = usnic_uiom_get_dev_list(pd->umem_pd);
 151                 for (i = 0; dev_list[i]; i++) {
 152                         dev = dev_list[i];
 153                         vf = pci_get_drvdata(to_pci_dev(dev));
 154                         spin_lock(&vf->lock);
 155                         vnic = vf->vnic;
 156                         if (!usnic_vnic_check_room(vnic, res_spec)) {
 157                                 usnic_dbg("Found used vnic %s from %s\n",
 158                                                 us_ibdev->ib_dev.name,
 159                                                 pci_name(usnic_vnic_get_pdev(
 160                                                                         vnic)));
 161                                 found = 1;
 162                                 break;
 163                         }
 164                         spin_unlock(&vf->lock);
 165
 166                 }
 167                 usnic_uiom_free_dev_list(dev_list);
 168         }
 169
 170         if (!found) {
 171                 /* Try to find resources on an unused vf */
 172                 list_for_each_entry(vf, &us_ibdev->vf_dev_list, link) {
 173                         spin_lock(&vf->lock);
 174                         vnic = vf->vnic;
 175                         if (vf->qp_grp_ref_cnt == 0 &&
 176                                 usnic_vnic_check_room(vnic, res_spec) == 0) {
 177                                 found = 1;
 178                                 break;
 179                         }
 180                         spin_unlock(&vf->lock);
 181                 }
 182         }
 183
 184         if (!found) {
 185                 usnic_info("No free qp grp found on %s\n",
 186                                 us_ibdev->ib_dev.name);
 187                 return ERR_PTR(-ENOMEM);
 188         }
 189
 190         qp_grp = usnic_ib_qp_grp_create(us_ibdev->ufdev, vf, pd, res_spec,
 191                                                 trans_spec);
 192         spin_unlock(&vf->lock);
 193         if (IS_ERR_OR_NULL(qp_grp)) {
 194                 usnic_err("Failed to allocate qp_grp\n");
 195                 return ERR_PTR(qp_grp ? PTR_ERR(qp_grp) : -ENOMEM);
 196         }
 197
 198         return qp_grp;
 199 }
 200
 201 static void qp_grp_destroy(struct usnic_ib_qp_grp *qp_grp)
 202 {
 203         struct usnic_ib_vf *vf = qp_grp->vf;
 204
 205         WARN_ON(qp_grp->state != IB_QPS_RESET);
 206
 207         spin_lock(&vf->lock);
 208         usnic_ib_qp_grp_destroy(qp_grp);
 209         spin_unlock(&vf->lock);
 210 }
 211
 212 static void eth_speed_to_ib_speed(int speed, u8 *active_speed,
 213                                         u8 *active_width)
 214 {
 215         if (speed <= 10000) {
 216                 *active_width = IB_WIDTH_1X;
 217                 *active_speed = IB_SPEED_FDR10;
 218         } else if (speed <= 20000) {
 219                 *active_width = IB_WIDTH_4X;
 220                 *active_speed = IB_SPEED_DDR;
 221         } else if (speed <= 30000) {
 222                 *active_width = IB_WIDTH_4X;
 223                 *active_speed = IB_SPEED_QDR;
 224         } else if (speed <= 40000) {
 225                 *active_width = IB_WIDTH_4X;
 226                 *active_speed = IB_SPEED_FDR10;
 227         } else {
 228                 *active_width = IB_WIDTH_4X;
 229                 *active_speed = IB_SPEED_EDR;
 230         }
 231 }
 232
 233 static int create_qp_validate_user_data(struct usnic_ib_create_qp_cmd cmd)
 234 {
 235         if (cmd.spec.trans_type <= USNIC_TRANSPORT_UNKNOWN ||
 236                         cmd.spec.trans_type >= USNIC_TRANSPORT_MAX)
 237                 return -EINVAL;
 238
 239         return 0;
 240 }
 241
 242 /* Start of ib callback functions */
 243
 244 enum rdma_link_layer usnic_ib_port_link_layer(struct ib_device *device,
 245                                                 u8 port_num)
 246 {
 247         return IB_LINK_LAYER_ETHERNET;
 248 }
 249
 250 int usnic_ib_query_device(struct ib_device *ibdev,
 251                                 struct ib_device_attr *props)
 252 {
 253         struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
 254         union ib_gid gid;
 255         struct ethtool_drvinfo info;
 256         struct ethtool_cmd cmd;
 257         int qp_per_vf;
 258
 259         usnic_dbg("\n");
 260         mutex_lock(&us_ibdev->usdev_lock);
 261         us_ibdev->netdev->ethtool_ops->get_drvinfo(us_ibdev->netdev, &info);
 262         us_ibdev->netdev->ethtool_ops->get_settings(us_ibdev->netdev, &cmd);
 263         memset(props, 0, sizeof(*props));
 264         usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr,
 265                         &gid.raw[0]);
 266         memcpy(&props->sys_image_guid, &gid.global.interface_id,
 267                 sizeof(gid.global.interface_id));
 268         usnic_ib_fw_string_to_u64(&info.fw_version[0], &props->fw_ver);
 269         props->max_mr_size = USNIC_UIOM_MAX_MR_SIZE;
 270         props->page_size_cap = USNIC_UIOM_PAGE_SIZE;
 271         props->vendor_id = PCI_VENDOR_ID_CISCO;
 272         props->vendor_part_id = PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC;
 273         props->hw_ver = us_ibdev->pdev->subsystem_device;
 274         qp_per_vf = max(us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_WQ],
 275                         us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_RQ]);
 276         props->max_qp = qp_per_vf *
 277                 atomic_read(&us_ibdev->vf_cnt.refcount);
 278         props->device_cap_flags = IB_DEVICE_PORT_ACTIVE_EVENT |
 279                 IB_DEVICE_SYS_IMAGE_GUID | IB_DEVICE_BLOCK_MULTICAST_LOOPBACK;
 280         props->max_cq = us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_CQ] *
 281                 atomic_read(&us_ibdev->vf_cnt.refcount);
 282         props->max_pd = USNIC_UIOM_MAX_PD_CNT;
 283         props->max_mr = USNIC_UIOM_MAX_MR_CNT;
 284         props->local_ca_ack_delay = 0;
 285         props->max_pkeys = 0;
 286         props->atomic_cap = IB_ATOMIC_NONE;
 287         props->masked_atomic_cap = props->atomic_cap;
 288         props->max_qp_rd_atom = 0;
 289         props->max_qp_init_rd_atom = 0;
 290         props->max_res_rd_atom = 0;
 291         props->max_srq = 0;
 292         props->max_srq_wr = 0;
 293         props->max_srq_sge = 0;
 294         props->max_fast_reg_page_list_len = 0;
 295         props->max_mcast_grp = 0;
 296         props->max_mcast_qp_attach = 0;
 297         props->max_total_mcast_qp_attach = 0;
 298         props->max_map_per_fmr = 0;
 299         /* Owned by Userspace
 300          * max_qp_wr, max_sge, max_sge_rd, max_cqe */
 301         mutex_unlock(&us_ibdev->usdev_lock);
 302
 303         return 0;
 304 }
 305
 306 int usnic_ib_query_port(struct ib_device *ibdev, u8 port,
 307                                 struct ib_port_attr *props)
 308 {
 309         struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
 310         struct ethtool_cmd cmd;
 311
 312         usnic_dbg("\n");
 313
 314         mutex_lock(&us_ibdev->usdev_lock);
 315         us_ibdev->netdev->ethtool_ops->get_settings(us_ibdev->netdev, &cmd);
 316         memset(props, 0, sizeof(*props));
 317
 318         props->lid = 0;
 319         props->lmc = 1;
 320         props->sm_lid = 0;
 321         props->sm_sl = 0;
 322
 323         if (!us_ibdev->ufdev->link_up) {
 324                 props->state = IB_PORT_DOWN;
 325                 props->phys_state = 3;
 326         } else if (!us_ibdev->ufdev->inaddr) {
 327                 props->state = IB_PORT_INIT;
 328                 props->phys_state = 4;
 329         } else {
 330                 props->state = IB_PORT_ACTIVE;
 331                 props->phys_state = 5;
 332         }
 333
 334         props->port_cap_flags = 0;
 335         props->gid_tbl_len = 1;
 336         props->pkey_tbl_len = 1;
 337         props->bad_pkey_cntr = 0;
 338         props->qkey_viol_cntr = 0;
 339         eth_speed_to_ib_speed(cmd.speed, &props->active_speed,
 340                                 &props->active_width);
 341         props->max_mtu = IB_MTU_4096;
 342         props->active_mtu = iboe_get_mtu(us_ibdev->ufdev->mtu);
 343         /* Userspace will adjust for hdrs */
 344         props->max_msg_sz = us_ibdev->ufdev->mtu;
 345         props->max_vl_num = 1;
 346         mutex_unlock(&us_ibdev->usdev_lock);
 347
 348         return 0;
 349 }
 350
 351 int usnic_ib_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
 352                                 int qp_attr_mask,
 353                                 struct ib_qp_init_attr *qp_init_attr)
 354 {
 355         struct usnic_ib_qp_grp *qp_grp;
 356         struct usnic_ib_vf *vf;
 357         int err;
 358
 359         usnic_dbg("\n");
 360
 361         memset(qp_attr, 0, sizeof(*qp_attr));
 362         memset(qp_init_attr, 0, sizeof(*qp_init_attr));
 363
 364         qp_grp = to_uqp_grp(qp);
 365         vf = qp_grp->vf;
 366         mutex_lock(&vf->pf->usdev_lock);
 367         usnic_dbg("\n");
 368         qp_attr->qp_state = qp_grp->state;
 369         qp_attr->cur_qp_state = qp_grp->state;
 370
 371         switch (qp_grp->ibqp.qp_type) {
 372         case IB_QPT_UD:
 373                 qp_attr->qkey = 0;
 374                 break;
 375         default:
 376                 usnic_err("Unexpected qp_type %d\n", qp_grp->ibqp.qp_type);
 377                 err = -EINVAL;
 378                 goto err_out;
 379         }
 380
 381         mutex_unlock(&vf->pf->usdev_lock);
 382         return 0;
 383
 384 err_out:
 385         mutex_unlock(&vf->pf->usdev_lock);
 386         return err;
 387 }
 388
 389 int usnic_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
 390                                 union ib_gid *gid)
 391 {
 392
 393         struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
 394         usnic_dbg("\n");
 395
 396         if (index > 1)
 397                 return -EINVAL;
 398
 399         mutex_lock(&us_ibdev->usdev_lock);
 400         memset(&(gid->raw[0]), 0, sizeof(gid->raw));
 401         usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr,
 402                         &gid->raw[0]);
 403         mutex_unlock(&us_ibdev->usdev_lock);
 404
 405         return 0;
 406 }
 407
 408 int usnic_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
 409                                 u16 *pkey)
 410 {
 411         if (index > 1)
 412                 return -EINVAL;
 413
 414         *pkey = 0xffff;
 415         return 0;
 416 }
 417
 418 struct ib_pd *usnic_ib_alloc_pd(struct ib_device *ibdev,
 419                                         struct ib_ucontext *context,
 420                                         struct ib_udata *udata)
 421 {
 422         struct usnic_ib_pd *pd;
 423         void *umem_pd;
 424
 425         usnic_dbg("\n");
 426
 427         pd = kzalloc(sizeof(*pd), GFP_KERNEL);
 428         if (!pd)
 429                 return ERR_PTR(-ENOMEM);
 430
 431         umem_pd = pd->umem_pd = usnic_uiom_alloc_pd();
 432         if (IS_ERR_OR_NULL(umem_pd)) {
 433                 kfree(pd);
 434                 return ERR_PTR(umem_pd ? PTR_ERR(umem_pd) : -ENOMEM);
 435         }
 436
 437         usnic_info("domain 0x%p allocated for context 0x%p and device %s\n",
 438                         pd, context, ibdev->name);
 439         return &pd->ibpd;
 440 }
 441
 442 int usnic_ib_dealloc_pd(struct ib_pd *pd)
 443 {
 444         usnic_info("freeing domain 0x%p\n", pd);
 445
 446         usnic_uiom_dealloc_pd((to_upd(pd))->umem_pd);
 447         kfree(pd);
 448         return 0;
 449 }
 450
 451 struct ib_qp *usnic_ib_create_qp(struct ib_pd *pd,
 452                                         struct ib_qp_init_attr *init_attr,
 453                                         struct ib_udata *udata)
 454 {
 455         int err;
 456         struct usnic_ib_dev *us_ibdev;
 457         struct usnic_ib_qp_grp *qp_grp;
 458         struct usnic_ib_ucontext *ucontext;
 459         int cq_cnt;
 460         struct usnic_vnic_res_spec res_spec;
 461         struct usnic_ib_create_qp_cmd cmd;
 462         struct usnic_transport_spec trans_spec;
 463
 464         usnic_dbg("\n");
 465
 466         ucontext = to_uucontext(pd->uobject->context);
 467         us_ibdev = to_usdev(pd->device);
 468
 469         err = ib_copy_from_udata(&cmd, udata, sizeof(cmd));
 470         if (err) {
 471                 usnic_err("%s: cannot copy udata for create_qp\n",
 472                                 us_ibdev->ib_dev.name);
 473                 return ERR_PTR(-EINVAL);
 474         }
 475
 476         err = create_qp_validate_user_data(cmd);
 477         if (err) {
 478                 usnic_err("%s: Failed to validate user data\n",
 479                                 us_ibdev->ib_dev.name);
 480                 return ERR_PTR(-EINVAL);
 481         }
 482
 483         if (init_attr->qp_type != IB_QPT_UD) {
 484                 usnic_err("%s asked to make a non-UD QP: %d\n",
 485                                 us_ibdev->ib_dev.name, init_attr->qp_type);
 486                 return ERR_PTR(-EINVAL);
 487         }
 488
 489         trans_spec = cmd.spec;
 490         mutex_lock(&us_ibdev->usdev_lock);
 491         cq_cnt = (init_attr->send_cq == init_attr->recv_cq) ? 1 : 2;
 492         res_spec = min_transport_spec[trans_spec.trans_type];
 493         usnic_vnic_res_spec_update(&res_spec, USNIC_VNIC_RES_TYPE_CQ, cq_cnt);
 494         qp_grp = find_free_vf_and_create_qp_grp(us_ibdev, to_upd(pd),
 495                                                 &trans_spec,
 496                                                 &res_spec);
 497         if (IS_ERR_OR_NULL(qp_grp)) {
 498                 err = qp_grp ? PTR_ERR(qp_grp) : -ENOMEM;
 499                 goto out_release_mutex;
 500         }
 501
 502         err = usnic_ib_fill_create_qp_resp(qp_grp, udata);
 503         if (err) {
 504                 err = -EBUSY;
 505                 goto out_release_qp_grp;
 506         }
 507
 508         qp_grp->ctx = ucontext;
 509         list_add_tail(&qp_grp->link, &ucontext->qp_grp_list);
 510         usnic_ib_log_vf(qp_grp->vf);
 511         mutex_unlock(&us_ibdev->usdev_lock);
 512         return &qp_grp->ibqp;
 513
 514 out_release_qp_grp:
 515         qp_grp_destroy(qp_grp);
 516 out_release_mutex:
 517         mutex_unlock(&us_ibdev->usdev_lock);
 518         return ERR_PTR(err);
 519 }
 520
 521 int usnic_ib_destroy_qp(struct ib_qp *qp)
 522 {
 523         struct usnic_ib_qp_grp *qp_grp;
 524         struct usnic_ib_vf *vf;
 525
 526         usnic_dbg("\n");
 527
 528         qp_grp = to_uqp_grp(qp);
 529         vf = qp_grp->vf;
 530         mutex_lock(&vf->pf->usdev_lock);
 531         if (usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RESET, NULL)) {
 532                 usnic_err("Failed to move qp grp %u to reset\n",
 533                                 qp_grp->grp_id);
 534         }
 535
 536         list_del(&qp_grp->link);
 537         qp_grp_destroy(qp_grp);
 538         mutex_unlock(&vf->pf->usdev_lock);
 539
 540         return 0;
 541 }
 542
 543 int usnic_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
 544                                 int attr_mask, struct ib_udata *udata)
 545 {
 546         struct usnic_ib_qp_grp *qp_grp;
 547         int status;
 548         usnic_dbg("\n");
 549
 550         qp_grp = to_uqp_grp(ibqp);
 551
 552         /* TODO: Future Support All States */
 553         mutex_lock(&qp_grp->vf->pf->usdev_lock);
 554         if ((attr_mask & IB_QP_STATE) && attr->qp_state == IB_QPS_INIT) {
 555                 status = usnic_ib_qp_grp_modify(qp_grp, IB_QPS_INIT, NULL);
 556         } else if ((attr_mask & IB_QP_STATE) && attr->qp_state == IB_QPS_RTR) {
 557                 status = usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RTR, NULL);
 558         } else if ((attr_mask & IB_QP_STATE) && attr->qp_state == IB_QPS_RTS) {
 559                 status = usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RTS, NULL);
 560         } else {
 561                 usnic_err("Unexpected combination mask: %u state: %u\n",
 562                                 attr_mask & IB_QP_STATE, attr->qp_state);
 563                 status = -EINVAL;
 564         }
 565
 566         mutex_unlock(&qp_grp->vf->pf->usdev_lock);
 567         return status;
 568 }
 569
 570 struct ib_cq *usnic_ib_create_cq(struct ib_device *ibdev, int entries,
 571                                         int vector, struct ib_ucontext *context,
 572                                         struct ib_udata *udata)
 573 {
 574         struct ib_cq *cq;
 575
 576         usnic_dbg("\n");
 577         cq = kzalloc(sizeof(*cq), GFP_KERNEL);
 578         if (!cq)
 579                 return ERR_PTR(-EBUSY);
 580
 581         return cq;
 582 }
 583
 584 int usnic_ib_destroy_cq(struct ib_cq *cq)
 585 {
 586         usnic_dbg("\n");
 587         kfree(cq);
 588         return 0;
 589 }
 590
 591 struct ib_mr *usnic_ib_reg_mr(struct ib_pd *pd, u64 start, u64 length,
 592                                         u64 virt_addr, int access_flags,
 593                                         struct ib_udata *udata)
 594 {
 595         struct usnic_ib_mr *mr;
 596         int err;
 597
 598         usnic_dbg("start 0x%llx va 0x%llx length 0x%llx\n", start,
 599                         virt_addr, length);
 600
 601         mr = kzalloc(sizeof(*mr), GFP_KERNEL);
 602         if (IS_ERR_OR_NULL(mr))
 603                 return ERR_PTR(mr ? PTR_ERR(mr) : -ENOMEM);
 604
 605         mr->umem = usnic_uiom_reg_get(to_upd(pd)->umem_pd, start, length,
 606                                         access_flags, 0);
 607         if (IS_ERR_OR_NULL(mr->umem)) {
 608                 err = mr->umem ? PTR_ERR(mr->umem) : -EFAULT;
 609                 goto err_free;
 610         }
 611
 612         mr->ibmr.lkey = mr->ibmr.rkey = 0;
 613         return &mr->ibmr;
 614
 615 err_free:
 616         kfree(mr);
 617         return ERR_PTR(err);
 618 }
 619
 620 int usnic_ib_dereg_mr(struct ib_mr *ibmr)
 621 {
 622         struct usnic_ib_mr *mr = to_umr(ibmr);
 623
 624         usnic_dbg("va 0x%lx length 0x%zx\n", mr->umem->va, mr->umem->length);
 625
 626         usnic_uiom_reg_release(mr->umem, ibmr->pd->uobject->context->closing);
 627         kfree(mr);
 628         return 0;
 629 }
 630
 631 struct ib_ucontext *usnic_ib_alloc_ucontext(struct ib_device *ibdev,
 632                                                         struct ib_udata *udata)
 633 {
 634         struct usnic_ib_ucontext *context;
 635         struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
 636         usnic_dbg("\n");
 637
 638         context = kmalloc(sizeof(*context), GFP_KERNEL);
 639         if (!context)
 640                 return ERR_PTR(-ENOMEM);
 641
 642         INIT_LIST_HEAD(&context->qp_grp_list);
 643         mutex_lock(&us_ibdev->usdev_lock);
 644         list_add_tail(&context->link, &us_ibdev->ctx_list);
 645         mutex_unlock(&us_ibdev->usdev_lock);
 646
 647         return &context->ibucontext;
 648 }
 649
 650 int usnic_ib_dealloc_ucontext(struct ib_ucontext *ibcontext)
 651 {
 652         struct usnic_ib_ucontext *context = to_uucontext(ibcontext);
 653         struct usnic_ib_dev *us_ibdev = to_usdev(ibcontext->device);
 654         usnic_dbg("\n");
 655
 656         mutex_lock(&us_ibdev->usdev_lock);
 657         BUG_ON(!list_empty(&context->qp_grp_list));
 658         list_del(&context->link);
 659         mutex_unlock(&us_ibdev->usdev_lock);
 660         kfree(context);
 661         return 0;
 662 }
 663
 664 int usnic_ib_mmap(struct ib_ucontext *context,
 665                                 struct vm_area_struct *vma)
 666 {
 667         struct usnic_ib_ucontext *uctx = to_ucontext(context);
 668         struct usnic_ib_dev *us_ibdev;
 669         struct usnic_ib_qp_grp *qp_grp;
 670         struct usnic_ib_vf *vf;
 671         struct vnic_dev_bar *bar;
 672         dma_addr_t bus_addr;
 673         unsigned int len;
 674         unsigned int vfid;
 675
 676         usnic_dbg("\n");
 677
 678         us_ibdev = to_usdev(context->device);
 679         vma->vm_flags |= VM_IO;
 680         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 681         vfid = vma->vm_pgoff;
 682         usnic_dbg("Page Offset %lu PAGE_SHIFT %u VFID %u\n",
 683                         vma->vm_pgoff, PAGE_SHIFT, vfid);
 684
 685         mutex_lock(&us_ibdev->usdev_lock);
 686         list_for_each_entry(qp_grp, &uctx->qp_grp_list, link) {
 687                 vf = qp_grp->vf;
 688                 if (usnic_vnic_get_index(vf->vnic) == vfid) {
 689                         bar = usnic_vnic_get_bar(vf->vnic, 0);
 690                         if ((vma->vm_end - vma->vm_start) != bar->len) {
 691                                 usnic_err("Bar0 Len %lu - Request map %lu\n",
 692                                                 bar->len,
 693                                                 vma->vm_end - vma->vm_start);
 694                                 mutex_unlock(&us_ibdev->usdev_lock);
 695                                 return -EINVAL;
 696                         }
 697                         bus_addr = bar->bus_addr;
 698                         len = bar->len;
 699                         usnic_dbg("bus: %pa vaddr: %p size: %ld\n",
 700                                         &bus_addr, bar->vaddr, bar->len);
 701                         mutex_unlock(&us_ibdev->usdev_lock);
 702
 703                         return remap_pfn_range(vma,
 704                                                 vma->vm_start,
 705                                                 bus_addr >> PAGE_SHIFT,
 706                                                 len, vma->vm_page_prot);
 707                 }
 708         }
 709
 710         mutex_unlock(&us_ibdev->usdev_lock);
 711         usnic_err("No VF %u found\n", vfid);
 712         return -EINVAL;
 713 }
 714
 715 /* In ib callbacks section -  Start of stub funcs */
 716 struct ib_ah *usnic_ib_create_ah(struct ib_pd *pd,
 717                                         struct ib_ah_attr *ah_attr)
 718 {
 719         usnic_dbg("\n");
 720         return ERR_PTR(-EPERM);
 721 }
 722
 723 int usnic_ib_destroy_ah(struct ib_ah *ah)
 724 {
 725         usnic_dbg("\n");
 726         return -EINVAL;
 727 }
 728
 729 int usnic_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
 730                                 struct ib_send_wr **bad_wr)
 731 {
 732         usnic_dbg("\n");
 733         return -EINVAL;
 734 }
 735
 736 int usnic_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
 737                                 struct ib_recv_wr **bad_wr)
 738 {
 739         usnic_dbg("\n");
 740         return -EINVAL;
 741 }
 742
 743 int usnic_ib_poll_cq(struct ib_cq *ibcq, int num_entries,
 744                                 struct ib_wc *wc)
 745 {
 746         usnic_dbg("\n");
 747         return -EINVAL;
 748 }
 749
 750 int usnic_ib_req_notify_cq(struct ib_cq *cq,
 751                                         enum ib_cq_notify_flags flags)
 752 {
 753         usnic_dbg("\n");
 754         return -EINVAL;
 755 }
 756
 757 struct ib_mr *usnic_ib_get_dma_mr(struct ib_pd *pd, int acc)
 758 {
 759         usnic_dbg("\n");
 760         return ERR_PTR(-ENOMEM);
 761 }
 762
 763
 764 /* In ib callbacks section - End of stub funcs */
 765 /* End of ib callbacks section */