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 if (init_attr->create_flags) 470 return ERR_PTR(-EINVAL); 471 472 err = ib_copy_from_udata(&cmd, udata, sizeof(cmd)); 473 if (err) { 474 usnic_err("%s: cannot copy udata for create_qp\n", 475 us_ibdev->ib_dev.name); 476 return ERR_PTR(-EINVAL); 477 } 478 479 err = create_qp_validate_user_data(cmd); 480 if (err) { 481 usnic_err("%s: Failed to validate user data\n", 482 us_ibdev->ib_dev.name); 483 return ERR_PTR(-EINVAL); 484 } 485 486 if (init_attr->qp_type != IB_QPT_UD) { 487 usnic_err("%s asked to make a non-UD QP: %d\n", 488 us_ibdev->ib_dev.name, init_attr->qp_type); 489 return ERR_PTR(-EINVAL); 490 } 491 492 trans_spec = cmd.spec; 493 mutex_lock(&us_ibdev->usdev_lock); 494 cq_cnt = (init_attr->send_cq == init_attr->recv_cq) ? 1 : 2; 495 res_spec = min_transport_spec[trans_spec.trans_type]; 496 usnic_vnic_res_spec_update(&res_spec, USNIC_VNIC_RES_TYPE_CQ, cq_cnt); 497 qp_grp = find_free_vf_and_create_qp_grp(us_ibdev, to_upd(pd), 498 &trans_spec, 499 &res_spec); 500 if (IS_ERR_OR_NULL(qp_grp)) { 501 err = qp_grp ? PTR_ERR(qp_grp) : -ENOMEM; 502 goto out_release_mutex; 503 } 504 505 err = usnic_ib_fill_create_qp_resp(qp_grp, udata); 506 if (err) { 507 err = -EBUSY; 508 goto out_release_qp_grp; 509 } 510 511 qp_grp->ctx = ucontext; 512 list_add_tail(&qp_grp->link, &ucontext->qp_grp_list); 513 usnic_ib_log_vf(qp_grp->vf); 514 mutex_unlock(&us_ibdev->usdev_lock); 515 return &qp_grp->ibqp; 516 517 out_release_qp_grp: 518 qp_grp_destroy(qp_grp); 519 out_release_mutex: 520 mutex_unlock(&us_ibdev->usdev_lock); 521 return ERR_PTR(err); 522 } 523 524 int usnic_ib_destroy_qp(struct ib_qp *qp) 525 { 526 struct usnic_ib_qp_grp *qp_grp; 527 struct usnic_ib_vf *vf; 528 529 usnic_dbg("\n"); 530 531 qp_grp = to_uqp_grp(qp); 532 vf = qp_grp->vf; 533 mutex_lock(&vf->pf->usdev_lock); 534 if (usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RESET, NULL)) { 535 usnic_err("Failed to move qp grp %u to reset\n", 536 qp_grp->grp_id); 537 } 538 539 list_del(&qp_grp->link); 540 qp_grp_destroy(qp_grp); 541 mutex_unlock(&vf->pf->usdev_lock); 542 543 return 0; 544 } 545 546 int usnic_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 547 int attr_mask, struct ib_udata *udata) 548 { 549 struct usnic_ib_qp_grp *qp_grp; 550 int status; 551 usnic_dbg("\n"); 552 553 qp_grp = to_uqp_grp(ibqp); 554 555 /* TODO: Future Support All States */ 556 mutex_lock(&qp_grp->vf->pf->usdev_lock); 557 if ((attr_mask & IB_QP_STATE) && attr->qp_state == IB_QPS_INIT) { 558 status = usnic_ib_qp_grp_modify(qp_grp, IB_QPS_INIT, NULL); 559 } else if ((attr_mask & IB_QP_STATE) && attr->qp_state == IB_QPS_RTR) { 560 status = usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RTR, NULL); 561 } else if ((attr_mask & IB_QP_STATE) && attr->qp_state == IB_QPS_RTS) { 562 status = usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RTS, NULL); 563 } else { 564 usnic_err("Unexpected combination mask: %u state: %u\n", 565 attr_mask & IB_QP_STATE, attr->qp_state); 566 status = -EINVAL; 567 } 568 569 mutex_unlock(&qp_grp->vf->pf->usdev_lock); 570 return status; 571 } 572 573 struct ib_cq *usnic_ib_create_cq(struct ib_device *ibdev, int entries, 574 int vector, struct ib_ucontext *context, 575 struct ib_udata *udata) 576 { 577 struct ib_cq *cq; 578 579 usnic_dbg("\n"); 580 cq = kzalloc(sizeof(*cq), GFP_KERNEL); 581 if (!cq) 582 return ERR_PTR(-EBUSY); 583 584 return cq; 585 } 586 587 int usnic_ib_destroy_cq(struct ib_cq *cq) 588 { 589 usnic_dbg("\n"); 590 kfree(cq); 591 return 0; 592 } 593 594 struct ib_mr *usnic_ib_reg_mr(struct ib_pd *pd, u64 start, u64 length, 595 u64 virt_addr, int access_flags, 596 struct ib_udata *udata) 597 { 598 struct usnic_ib_mr *mr; 599 int err; 600 601 usnic_dbg("start 0x%llx va 0x%llx length 0x%llx\n", start, 602 virt_addr, length); 603 604 mr = kzalloc(sizeof(*mr), GFP_KERNEL); 605 if (IS_ERR_OR_NULL(mr)) 606 return ERR_PTR(mr ? PTR_ERR(mr) : -ENOMEM); 607 608 mr->umem = usnic_uiom_reg_get(to_upd(pd)->umem_pd, start, length, 609 access_flags, 0); 610 if (IS_ERR_OR_NULL(mr->umem)) { 611 err = mr->umem ? PTR_ERR(mr->umem) : -EFAULT; 612 goto err_free; 613 } 614 615 mr->ibmr.lkey = mr->ibmr.rkey = 0; 616 return &mr->ibmr; 617 618 err_free: 619 kfree(mr); 620 return ERR_PTR(err); 621 } 622 623 int usnic_ib_dereg_mr(struct ib_mr *ibmr) 624 { 625 struct usnic_ib_mr *mr = to_umr(ibmr); 626 627 usnic_dbg("va 0x%lx length 0x%zx\n", mr->umem->va, mr->umem->length); 628 629 usnic_uiom_reg_release(mr->umem, ibmr->pd->uobject->context->closing); 630 kfree(mr); 631 return 0; 632 } 633 634 struct ib_ucontext *usnic_ib_alloc_ucontext(struct ib_device *ibdev, 635 struct ib_udata *udata) 636 { 637 struct usnic_ib_ucontext *context; 638 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev); 639 usnic_dbg("\n"); 640 641 context = kmalloc(sizeof(*context), GFP_KERNEL); 642 if (!context) 643 return ERR_PTR(-ENOMEM); 644 645 INIT_LIST_HEAD(&context->qp_grp_list); 646 mutex_lock(&us_ibdev->usdev_lock); 647 list_add_tail(&context->link, &us_ibdev->ctx_list); 648 mutex_unlock(&us_ibdev->usdev_lock); 649 650 return &context->ibucontext; 651 } 652 653 int usnic_ib_dealloc_ucontext(struct ib_ucontext *ibcontext) 654 { 655 struct usnic_ib_ucontext *context = to_uucontext(ibcontext); 656 struct usnic_ib_dev *us_ibdev = to_usdev(ibcontext->device); 657 usnic_dbg("\n"); 658 659 mutex_lock(&us_ibdev->usdev_lock); 660 BUG_ON(!list_empty(&context->qp_grp_list)); 661 list_del(&context->link); 662 mutex_unlock(&us_ibdev->usdev_lock); 663 kfree(context); 664 return 0; 665 } 666 667 int usnic_ib_mmap(struct ib_ucontext *context, 668 struct vm_area_struct *vma) 669 { 670 struct usnic_ib_ucontext *uctx = to_ucontext(context); 671 struct usnic_ib_dev *us_ibdev; 672 struct usnic_ib_qp_grp *qp_grp; 673 struct usnic_ib_vf *vf; 674 struct vnic_dev_bar *bar; 675 dma_addr_t bus_addr; 676 unsigned int len; 677 unsigned int vfid; 678 679 usnic_dbg("\n"); 680 681 us_ibdev = to_usdev(context->device); 682 vma->vm_flags |= VM_IO; 683 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 684 vfid = vma->vm_pgoff; 685 usnic_dbg("Page Offset %lu PAGE_SHIFT %u VFID %u\n", 686 vma->vm_pgoff, PAGE_SHIFT, vfid); 687 688 mutex_lock(&us_ibdev->usdev_lock); 689 list_for_each_entry(qp_grp, &uctx->qp_grp_list, link) { 690 vf = qp_grp->vf; 691 if (usnic_vnic_get_index(vf->vnic) == vfid) { 692 bar = usnic_vnic_get_bar(vf->vnic, 0); 693 if ((vma->vm_end - vma->vm_start) != bar->len) { 694 usnic_err("Bar0 Len %lu - Request map %lu\n", 695 bar->len, 696 vma->vm_end - vma->vm_start); 697 mutex_unlock(&us_ibdev->usdev_lock); 698 return -EINVAL; 699 } 700 bus_addr = bar->bus_addr; 701 len = bar->len; 702 usnic_dbg("bus: %pa vaddr: %p size: %ld\n", 703 &bus_addr, bar->vaddr, bar->len); 704 mutex_unlock(&us_ibdev->usdev_lock); 705 706 return remap_pfn_range(vma, 707 vma->vm_start, 708 bus_addr >> PAGE_SHIFT, 709 len, vma->vm_page_prot); 710 } 711 } 712 713 mutex_unlock(&us_ibdev->usdev_lock); 714 usnic_err("No VF %u found\n", vfid); 715 return -EINVAL; 716 } 717 718 /* In ib callbacks section - Start of stub funcs */ 719 struct ib_ah *usnic_ib_create_ah(struct ib_pd *pd, 720 struct ib_ah_attr *ah_attr) 721 { 722 usnic_dbg("\n"); 723 return ERR_PTR(-EPERM); 724 } 725 726 int usnic_ib_destroy_ah(struct ib_ah *ah) 727 { 728 usnic_dbg("\n"); 729 return -EINVAL; 730 } 731 732 int usnic_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, 733 struct ib_send_wr **bad_wr) 734 { 735 usnic_dbg("\n"); 736 return -EINVAL; 737 } 738 739 int usnic_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr, 740 struct ib_recv_wr **bad_wr) 741 { 742 usnic_dbg("\n"); 743 return -EINVAL; 744 } 745 746 int usnic_ib_poll_cq(struct ib_cq *ibcq, int num_entries, 747 struct ib_wc *wc) 748 { 749 usnic_dbg("\n"); 750 return -EINVAL; 751 } 752 753 int usnic_ib_req_notify_cq(struct ib_cq *cq, 754 enum ib_cq_notify_flags flags) 755 { 756 usnic_dbg("\n"); 757 return -EINVAL; 758 } 759 760 struct ib_mr *usnic_ib_get_dma_mr(struct ib_pd *pd, int acc) 761 { 762 usnic_dbg("\n"); 763 return ERR_PTR(-ENOMEM); 764 } 765 766 767 /* In ib callbacks section - End of stub funcs */ 768 /* End of ib callbacks section */ 769