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_ib_verbs.h" 46 #include "usnic_fwd.h" 47 #include "usnic_log.h" 48 #include "usnic_uiom.h" 49 #include "usnic_transport.h" 50 #include "usnic_ib_verbs.h" 51 52 #define USNIC_DEFAULT_TRANSPORT USNIC_TRANSPORT_ROCE_CUSTOM 53 54 const struct usnic_vnic_res_spec min_transport_spec[USNIC_TRANSPORT_MAX] = { 55 { /*USNIC_TRANSPORT_UNKNOWN*/ 56 .resources = { 57 {.type = USNIC_VNIC_RES_TYPE_EOL, .cnt = 0,}, 58 }, 59 }, 60 { /*USNIC_TRANSPORT_ROCE_CUSTOM*/ 61 .resources = { 62 {.type = USNIC_VNIC_RES_TYPE_WQ, .cnt = 1,}, 63 {.type = USNIC_VNIC_RES_TYPE_RQ, .cnt = 1,}, 64 {.type = USNIC_VNIC_RES_TYPE_CQ, .cnt = 1,}, 65 {.type = USNIC_VNIC_RES_TYPE_EOL, .cnt = 0,}, 66 }, 67 }, 68 { /*USNIC_TRANSPORT_IPV4_UDP*/ 69 .resources = { 70 {.type = USNIC_VNIC_RES_TYPE_WQ, .cnt = 1,}, 71 {.type = USNIC_VNIC_RES_TYPE_RQ, .cnt = 1,}, 72 {.type = USNIC_VNIC_RES_TYPE_CQ, .cnt = 1,}, 73 {.type = USNIC_VNIC_RES_TYPE_EOL, .cnt = 0,}, 74 }, 75 }, 76 }; 77 78 static void usnic_ib_fw_string_to_u64(char *fw_ver_str, u64 *fw_ver) 79 { 80 *fw_ver = *((u64 *)fw_ver_str); 81 } 82 83 static int usnic_ib_fill_create_qp_resp(struct usnic_ib_qp_grp *qp_grp, 84 struct ib_udata *udata) 85 { 86 struct usnic_ib_dev *us_ibdev; 87 struct usnic_ib_create_qp_resp resp; 88 struct pci_dev *pdev; 89 struct vnic_dev_bar *bar; 90 struct usnic_vnic_res_chunk *chunk; 91 struct usnic_ib_qp_grp_flow *default_flow; 92 int i, err; 93 94 memset(&resp, 0, sizeof(resp)); 95 96 us_ibdev = qp_grp->vf->pf; 97 pdev = usnic_vnic_get_pdev(qp_grp->vf->vnic); 98 if (!pdev) { 99 usnic_err("Failed to get pdev of qp_grp %d\n", 100 qp_grp->grp_id); 101 return -EFAULT; 102 } 103 104 bar = usnic_vnic_get_bar(qp_grp->vf->vnic, 0); 105 if (!bar) { 106 usnic_err("Failed to get bar0 of qp_grp %d vf %s", 107 qp_grp->grp_id, pci_name(pdev)); 108 return -EFAULT; 109 } 110 111 resp.vfid = usnic_vnic_get_index(qp_grp->vf->vnic); 112 resp.bar_bus_addr = bar->bus_addr; 113 resp.bar_len = bar->len; 114 115 chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_RQ); 116 if (IS_ERR(chunk)) { 117 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n", 118 usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_RQ), 119 qp_grp->grp_id, 120 PTR_ERR(chunk)); 121 return PTR_ERR(chunk); 122 } 123 124 WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_RQ); 125 resp.rq_cnt = chunk->cnt; 126 for (i = 0; i < chunk->cnt; i++) 127 resp.rq_idx[i] = chunk->res[i]->vnic_idx; 128 129 chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_WQ); 130 if (IS_ERR(chunk)) { 131 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n", 132 usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_WQ), 133 qp_grp->grp_id, 134 PTR_ERR(chunk)); 135 return PTR_ERR(chunk); 136 } 137 138 WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_WQ); 139 resp.wq_cnt = chunk->cnt; 140 for (i = 0; i < chunk->cnt; i++) 141 resp.wq_idx[i] = chunk->res[i]->vnic_idx; 142 143 chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_CQ); 144 if (IS_ERR(chunk)) { 145 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n", 146 usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_CQ), 147 qp_grp->grp_id, 148 PTR_ERR(chunk)); 149 return PTR_ERR(chunk); 150 } 151 152 WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_CQ); 153 resp.cq_cnt = chunk->cnt; 154 for (i = 0; i < chunk->cnt; i++) 155 resp.cq_idx[i] = chunk->res[i]->vnic_idx; 156 157 default_flow = list_first_entry(&qp_grp->flows_lst, 158 struct usnic_ib_qp_grp_flow, link); 159 resp.transport = default_flow->trans_type; 160 161 err = ib_copy_to_udata(udata, &resp, sizeof(resp)); 162 if (err) { 163 usnic_err("Failed to copy udata for %s", us_ibdev->ib_dev.name); 164 return err; 165 } 166 167 return 0; 168 } 169 170 static struct usnic_ib_qp_grp* 171 find_free_vf_and_create_qp_grp(struct usnic_ib_dev *us_ibdev, 172 struct usnic_ib_pd *pd, 173 struct usnic_transport_spec *trans_spec, 174 struct usnic_vnic_res_spec *res_spec) 175 { 176 struct usnic_ib_vf *vf; 177 struct usnic_vnic *vnic; 178 struct usnic_ib_qp_grp *qp_grp; 179 struct device *dev, **dev_list; 180 int i; 181 182 BUG_ON(!mutex_is_locked(&us_ibdev->usdev_lock)); 183 184 if (list_empty(&us_ibdev->vf_dev_list)) { 185 usnic_info("No vfs to allocate\n"); 186 return NULL; 187 } 188 189 if (usnic_ib_share_vf) { 190 /* Try to find resouces on a used vf which is in pd */ 191 dev_list = usnic_uiom_get_dev_list(pd->umem_pd); 192 if (IS_ERR(dev_list)) 193 return ERR_CAST(dev_list); 194 for (i = 0; dev_list[i]; i++) { 195 dev = dev_list[i]; 196 vf = pci_get_drvdata(to_pci_dev(dev)); 197 spin_lock(&vf->lock); 198 vnic = vf->vnic; 199 if (!usnic_vnic_check_room(vnic, res_spec)) { 200 usnic_dbg("Found used vnic %s from %s\n", 201 us_ibdev->ib_dev.name, 202 pci_name(usnic_vnic_get_pdev( 203 vnic))); 204 qp_grp = usnic_ib_qp_grp_create(us_ibdev->ufdev, 205 vf, pd, 206 res_spec, 207 trans_spec); 208 209 spin_unlock(&vf->lock); 210 goto qp_grp_check; 211 } 212 spin_unlock(&vf->lock); 213 214 } 215 usnic_uiom_free_dev_list(dev_list); 216 } 217 218 /* Try to find resources on an unused vf */ 219 list_for_each_entry(vf, &us_ibdev->vf_dev_list, link) { 220 spin_lock(&vf->lock); 221 vnic = vf->vnic; 222 if (vf->qp_grp_ref_cnt == 0 && 223 usnic_vnic_check_room(vnic, res_spec) == 0) { 224 qp_grp = usnic_ib_qp_grp_create(us_ibdev->ufdev, vf, 225 pd, res_spec, 226 trans_spec); 227 228 spin_unlock(&vf->lock); 229 goto qp_grp_check; 230 } 231 spin_unlock(&vf->lock); 232 } 233 234 usnic_info("No free qp grp found on %s\n", us_ibdev->ib_dev.name); 235 return ERR_PTR(-ENOMEM); 236 237 qp_grp_check: 238 if (IS_ERR_OR_NULL(qp_grp)) { 239 usnic_err("Failed to allocate qp_grp\n"); 240 return ERR_PTR(qp_grp ? PTR_ERR(qp_grp) : -ENOMEM); 241 } 242 return qp_grp; 243 } 244 245 static void qp_grp_destroy(struct usnic_ib_qp_grp *qp_grp) 246 { 247 struct usnic_ib_vf *vf = qp_grp->vf; 248 249 WARN_ON(qp_grp->state != IB_QPS_RESET); 250 251 spin_lock(&vf->lock); 252 usnic_ib_qp_grp_destroy(qp_grp); 253 spin_unlock(&vf->lock); 254 } 255 256 static int create_qp_validate_user_data(struct usnic_ib_create_qp_cmd cmd) 257 { 258 if (cmd.spec.trans_type <= USNIC_TRANSPORT_UNKNOWN || 259 cmd.spec.trans_type >= USNIC_TRANSPORT_MAX) 260 return -EINVAL; 261 262 return 0; 263 } 264 265 /* Start of ib callback functions */ 266 267 enum rdma_link_layer usnic_ib_port_link_layer(struct ib_device *device, 268 u8 port_num) 269 { 270 return IB_LINK_LAYER_ETHERNET; 271 } 272 273 int usnic_ib_query_device(struct ib_device *ibdev, 274 struct ib_device_attr *props, 275 struct ib_udata *uhw) 276 { 277 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev); 278 union ib_gid gid; 279 struct ethtool_drvinfo info; 280 int qp_per_vf; 281 282 usnic_dbg("\n"); 283 if (uhw->inlen || uhw->outlen) 284 return -EINVAL; 285 286 mutex_lock(&us_ibdev->usdev_lock); 287 us_ibdev->netdev->ethtool_ops->get_drvinfo(us_ibdev->netdev, &info); 288 memset(props, 0, sizeof(*props)); 289 usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr, 290 &gid.raw[0]); 291 memcpy(&props->sys_image_guid, &gid.global.interface_id, 292 sizeof(gid.global.interface_id)); 293 usnic_ib_fw_string_to_u64(&info.fw_version[0], &props->fw_ver); 294 props->max_mr_size = USNIC_UIOM_MAX_MR_SIZE; 295 props->page_size_cap = USNIC_UIOM_PAGE_SIZE; 296 props->vendor_id = PCI_VENDOR_ID_CISCO; 297 props->vendor_part_id = PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC; 298 props->hw_ver = us_ibdev->pdev->subsystem_device; 299 qp_per_vf = max(us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_WQ], 300 us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_RQ]); 301 props->max_qp = qp_per_vf * 302 kref_read(&us_ibdev->vf_cnt); 303 props->device_cap_flags = IB_DEVICE_PORT_ACTIVE_EVENT | 304 IB_DEVICE_SYS_IMAGE_GUID | IB_DEVICE_BLOCK_MULTICAST_LOOPBACK; 305 props->max_cq = us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_CQ] * 306 kref_read(&us_ibdev->vf_cnt); 307 props->max_pd = USNIC_UIOM_MAX_PD_CNT; 308 props->max_mr = USNIC_UIOM_MAX_MR_CNT; 309 props->local_ca_ack_delay = 0; 310 props->max_pkeys = 0; 311 props->atomic_cap = IB_ATOMIC_NONE; 312 props->masked_atomic_cap = props->atomic_cap; 313 props->max_qp_rd_atom = 0; 314 props->max_qp_init_rd_atom = 0; 315 props->max_res_rd_atom = 0; 316 props->max_srq = 0; 317 props->max_srq_wr = 0; 318 props->max_srq_sge = 0; 319 props->max_fast_reg_page_list_len = 0; 320 props->max_mcast_grp = 0; 321 props->max_mcast_qp_attach = 0; 322 props->max_total_mcast_qp_attach = 0; 323 props->max_map_per_fmr = 0; 324 /* Owned by Userspace 325 * max_qp_wr, max_sge, max_sge_rd, max_cqe */ 326 mutex_unlock(&us_ibdev->usdev_lock); 327 328 return 0; 329 } 330 331 int usnic_ib_query_port(struct ib_device *ibdev, u8 port, 332 struct ib_port_attr *props) 333 { 334 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev); 335 336 usnic_dbg("\n"); 337 338 mutex_lock(&us_ibdev->usdev_lock); 339 if (ib_get_eth_speed(ibdev, port, &props->active_speed, 340 &props->active_width)) { 341 mutex_unlock(&us_ibdev->usdev_lock); 342 return -EINVAL; 343 } 344 345 /* props being zeroed by the caller, avoid zeroing it here */ 346 347 props->lid = 0; 348 props->lmc = 1; 349 props->sm_lid = 0; 350 props->sm_sl = 0; 351 352 if (!us_ibdev->ufdev->link_up) { 353 props->state = IB_PORT_DOWN; 354 props->phys_state = 3; 355 } else if (!us_ibdev->ufdev->inaddr) { 356 props->state = IB_PORT_INIT; 357 props->phys_state = 4; 358 } else { 359 props->state = IB_PORT_ACTIVE; 360 props->phys_state = 5; 361 } 362 363 props->port_cap_flags = 0; 364 props->gid_tbl_len = 1; 365 props->pkey_tbl_len = 1; 366 props->bad_pkey_cntr = 0; 367 props->qkey_viol_cntr = 0; 368 props->max_mtu = IB_MTU_4096; 369 props->active_mtu = iboe_get_mtu(us_ibdev->ufdev->mtu); 370 /* Userspace will adjust for hdrs */ 371 props->max_msg_sz = us_ibdev->ufdev->mtu; 372 props->max_vl_num = 1; 373 mutex_unlock(&us_ibdev->usdev_lock); 374 375 return 0; 376 } 377 378 int usnic_ib_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr, 379 int qp_attr_mask, 380 struct ib_qp_init_attr *qp_init_attr) 381 { 382 struct usnic_ib_qp_grp *qp_grp; 383 struct usnic_ib_vf *vf; 384 int err; 385 386 usnic_dbg("\n"); 387 388 memset(qp_attr, 0, sizeof(*qp_attr)); 389 memset(qp_init_attr, 0, sizeof(*qp_init_attr)); 390 391 qp_grp = to_uqp_grp(qp); 392 vf = qp_grp->vf; 393 mutex_lock(&vf->pf->usdev_lock); 394 usnic_dbg("\n"); 395 qp_attr->qp_state = qp_grp->state; 396 qp_attr->cur_qp_state = qp_grp->state; 397 398 switch (qp_grp->ibqp.qp_type) { 399 case IB_QPT_UD: 400 qp_attr->qkey = 0; 401 break; 402 default: 403 usnic_err("Unexpected qp_type %d\n", qp_grp->ibqp.qp_type); 404 err = -EINVAL; 405 goto err_out; 406 } 407 408 mutex_unlock(&vf->pf->usdev_lock); 409 return 0; 410 411 err_out: 412 mutex_unlock(&vf->pf->usdev_lock); 413 return err; 414 } 415 416 int usnic_ib_query_gid(struct ib_device *ibdev, u8 port, int index, 417 union ib_gid *gid) 418 { 419 420 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev); 421 usnic_dbg("\n"); 422 423 if (index > 1) 424 return -EINVAL; 425 426 mutex_lock(&us_ibdev->usdev_lock); 427 memset(&(gid->raw[0]), 0, sizeof(gid->raw)); 428 usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr, 429 &gid->raw[0]); 430 mutex_unlock(&us_ibdev->usdev_lock); 431 432 return 0; 433 } 434 435 struct net_device *usnic_get_netdev(struct ib_device *device, u8 port_num) 436 { 437 struct usnic_ib_dev *us_ibdev = to_usdev(device); 438 439 if (us_ibdev->netdev) 440 dev_hold(us_ibdev->netdev); 441 442 return us_ibdev->netdev; 443 } 444 445 int usnic_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index, 446 u16 *pkey) 447 { 448 if (index > 1) 449 return -EINVAL; 450 451 *pkey = 0xffff; 452 return 0; 453 } 454 455 struct ib_pd *usnic_ib_alloc_pd(struct ib_device *ibdev, 456 struct ib_ucontext *context, 457 struct ib_udata *udata) 458 { 459 struct usnic_ib_pd *pd; 460 void *umem_pd; 461 462 usnic_dbg("\n"); 463 464 pd = kzalloc(sizeof(*pd), GFP_KERNEL); 465 if (!pd) 466 return ERR_PTR(-ENOMEM); 467 468 umem_pd = pd->umem_pd = usnic_uiom_alloc_pd(); 469 if (IS_ERR_OR_NULL(umem_pd)) { 470 kfree(pd); 471 return ERR_PTR(umem_pd ? PTR_ERR(umem_pd) : -ENOMEM); 472 } 473 474 usnic_info("domain 0x%p allocated for context 0x%p and device %s\n", 475 pd, context, ibdev->name); 476 return &pd->ibpd; 477 } 478 479 int usnic_ib_dealloc_pd(struct ib_pd *pd) 480 { 481 usnic_info("freeing domain 0x%p\n", pd); 482 483 usnic_uiom_dealloc_pd((to_upd(pd))->umem_pd); 484 kfree(pd); 485 return 0; 486 } 487 488 struct ib_qp *usnic_ib_create_qp(struct ib_pd *pd, 489 struct ib_qp_init_attr *init_attr, 490 struct ib_udata *udata) 491 { 492 int err; 493 struct usnic_ib_dev *us_ibdev; 494 struct usnic_ib_qp_grp *qp_grp; 495 struct usnic_ib_ucontext *ucontext; 496 int cq_cnt; 497 struct usnic_vnic_res_spec res_spec; 498 struct usnic_ib_create_qp_cmd cmd; 499 struct usnic_transport_spec trans_spec; 500 501 usnic_dbg("\n"); 502 503 ucontext = to_uucontext(pd->uobject->context); 504 us_ibdev = to_usdev(pd->device); 505 506 if (init_attr->create_flags) 507 return ERR_PTR(-EINVAL); 508 509 err = ib_copy_from_udata(&cmd, udata, sizeof(cmd)); 510 if (err) { 511 usnic_err("%s: cannot copy udata for create_qp\n", 512 us_ibdev->ib_dev.name); 513 return ERR_PTR(-EINVAL); 514 } 515 516 err = create_qp_validate_user_data(cmd); 517 if (err) { 518 usnic_err("%s: Failed to validate user data\n", 519 us_ibdev->ib_dev.name); 520 return ERR_PTR(-EINVAL); 521 } 522 523 if (init_attr->qp_type != IB_QPT_UD) { 524 usnic_err("%s asked to make a non-UD QP: %d\n", 525 us_ibdev->ib_dev.name, init_attr->qp_type); 526 return ERR_PTR(-EINVAL); 527 } 528 529 trans_spec = cmd.spec; 530 mutex_lock(&us_ibdev->usdev_lock); 531 cq_cnt = (init_attr->send_cq == init_attr->recv_cq) ? 1 : 2; 532 res_spec = min_transport_spec[trans_spec.trans_type]; 533 usnic_vnic_res_spec_update(&res_spec, USNIC_VNIC_RES_TYPE_CQ, cq_cnt); 534 qp_grp = find_free_vf_and_create_qp_grp(us_ibdev, to_upd(pd), 535 &trans_spec, 536 &res_spec); 537 if (IS_ERR_OR_NULL(qp_grp)) { 538 err = qp_grp ? PTR_ERR(qp_grp) : -ENOMEM; 539 goto out_release_mutex; 540 } 541 542 err = usnic_ib_fill_create_qp_resp(qp_grp, udata); 543 if (err) { 544 err = -EBUSY; 545 goto out_release_qp_grp; 546 } 547 548 qp_grp->ctx = ucontext; 549 list_add_tail(&qp_grp->link, &ucontext->qp_grp_list); 550 usnic_ib_log_vf(qp_grp->vf); 551 mutex_unlock(&us_ibdev->usdev_lock); 552 return &qp_grp->ibqp; 553 554 out_release_qp_grp: 555 qp_grp_destroy(qp_grp); 556 out_release_mutex: 557 mutex_unlock(&us_ibdev->usdev_lock); 558 return ERR_PTR(err); 559 } 560 561 int usnic_ib_destroy_qp(struct ib_qp *qp) 562 { 563 struct usnic_ib_qp_grp *qp_grp; 564 struct usnic_ib_vf *vf; 565 566 usnic_dbg("\n"); 567 568 qp_grp = to_uqp_grp(qp); 569 vf = qp_grp->vf; 570 mutex_lock(&vf->pf->usdev_lock); 571 if (usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RESET, NULL)) { 572 usnic_err("Failed to move qp grp %u to reset\n", 573 qp_grp->grp_id); 574 } 575 576 list_del(&qp_grp->link); 577 qp_grp_destroy(qp_grp); 578 mutex_unlock(&vf->pf->usdev_lock); 579 580 return 0; 581 } 582 583 int usnic_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 584 int attr_mask, struct ib_udata *udata) 585 { 586 struct usnic_ib_qp_grp *qp_grp; 587 int status; 588 usnic_dbg("\n"); 589 590 qp_grp = to_uqp_grp(ibqp); 591 592 mutex_lock(&qp_grp->vf->pf->usdev_lock); 593 if ((attr_mask & IB_QP_PORT) && attr->port_num != 1) { 594 /* usnic devices only have one port */ 595 status = -EINVAL; 596 goto out_unlock; 597 } 598 if (attr_mask & IB_QP_STATE) { 599 status = usnic_ib_qp_grp_modify(qp_grp, attr->qp_state, NULL); 600 } else { 601 usnic_err("Unhandled request, attr_mask=0x%x\n", attr_mask); 602 status = -EINVAL; 603 } 604 605 out_unlock: 606 mutex_unlock(&qp_grp->vf->pf->usdev_lock); 607 return status; 608 } 609 610 struct ib_cq *usnic_ib_create_cq(struct ib_device *ibdev, 611 const struct ib_cq_init_attr *attr, 612 struct ib_ucontext *context, 613 struct ib_udata *udata) 614 { 615 struct ib_cq *cq; 616 617 usnic_dbg("\n"); 618 if (attr->flags) 619 return ERR_PTR(-EINVAL); 620 621 cq = kzalloc(sizeof(*cq), GFP_KERNEL); 622 if (!cq) 623 return ERR_PTR(-EBUSY); 624 625 return cq; 626 } 627 628 int usnic_ib_destroy_cq(struct ib_cq *cq) 629 { 630 usnic_dbg("\n"); 631 kfree(cq); 632 return 0; 633 } 634 635 struct ib_mr *usnic_ib_reg_mr(struct ib_pd *pd, u64 start, u64 length, 636 u64 virt_addr, int access_flags, 637 struct ib_udata *udata) 638 { 639 struct usnic_ib_mr *mr; 640 int err; 641 642 usnic_dbg("start 0x%llx va 0x%llx length 0x%llx\n", start, 643 virt_addr, length); 644 645 mr = kzalloc(sizeof(*mr), GFP_KERNEL); 646 if (!mr) 647 return ERR_PTR(-ENOMEM); 648 649 mr->umem = usnic_uiom_reg_get(to_upd(pd)->umem_pd, start, length, 650 access_flags, 0); 651 if (IS_ERR_OR_NULL(mr->umem)) { 652 err = mr->umem ? PTR_ERR(mr->umem) : -EFAULT; 653 goto err_free; 654 } 655 656 mr->ibmr.lkey = mr->ibmr.rkey = 0; 657 return &mr->ibmr; 658 659 err_free: 660 kfree(mr); 661 return ERR_PTR(err); 662 } 663 664 int usnic_ib_dereg_mr(struct ib_mr *ibmr) 665 { 666 struct usnic_ib_mr *mr = to_umr(ibmr); 667 668 usnic_dbg("va 0x%lx length 0x%zx\n", mr->umem->va, mr->umem->length); 669 670 usnic_uiom_reg_release(mr->umem, ibmr->pd->uobject->context->closing); 671 kfree(mr); 672 return 0; 673 } 674 675 struct ib_ucontext *usnic_ib_alloc_ucontext(struct ib_device *ibdev, 676 struct ib_udata *udata) 677 { 678 struct usnic_ib_ucontext *context; 679 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev); 680 usnic_dbg("\n"); 681 682 context = kmalloc(sizeof(*context), GFP_KERNEL); 683 if (!context) 684 return ERR_PTR(-ENOMEM); 685 686 INIT_LIST_HEAD(&context->qp_grp_list); 687 mutex_lock(&us_ibdev->usdev_lock); 688 list_add_tail(&context->link, &us_ibdev->ctx_list); 689 mutex_unlock(&us_ibdev->usdev_lock); 690 691 return &context->ibucontext; 692 } 693 694 int usnic_ib_dealloc_ucontext(struct ib_ucontext *ibcontext) 695 { 696 struct usnic_ib_ucontext *context = to_uucontext(ibcontext); 697 struct usnic_ib_dev *us_ibdev = to_usdev(ibcontext->device); 698 usnic_dbg("\n"); 699 700 mutex_lock(&us_ibdev->usdev_lock); 701 BUG_ON(!list_empty(&context->qp_grp_list)); 702 list_del(&context->link); 703 mutex_unlock(&us_ibdev->usdev_lock); 704 kfree(context); 705 return 0; 706 } 707 708 int usnic_ib_mmap(struct ib_ucontext *context, 709 struct vm_area_struct *vma) 710 { 711 struct usnic_ib_ucontext *uctx = to_ucontext(context); 712 struct usnic_ib_dev *us_ibdev; 713 struct usnic_ib_qp_grp *qp_grp; 714 struct usnic_ib_vf *vf; 715 struct vnic_dev_bar *bar; 716 dma_addr_t bus_addr; 717 unsigned int len; 718 unsigned int vfid; 719 720 usnic_dbg("\n"); 721 722 us_ibdev = to_usdev(context->device); 723 vma->vm_flags |= VM_IO; 724 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 725 vfid = vma->vm_pgoff; 726 usnic_dbg("Page Offset %lu PAGE_SHIFT %u VFID %u\n", 727 vma->vm_pgoff, PAGE_SHIFT, vfid); 728 729 mutex_lock(&us_ibdev->usdev_lock); 730 list_for_each_entry(qp_grp, &uctx->qp_grp_list, link) { 731 vf = qp_grp->vf; 732 if (usnic_vnic_get_index(vf->vnic) == vfid) { 733 bar = usnic_vnic_get_bar(vf->vnic, 0); 734 if ((vma->vm_end - vma->vm_start) != bar->len) { 735 usnic_err("Bar0 Len %lu - Request map %lu\n", 736 bar->len, 737 vma->vm_end - vma->vm_start); 738 mutex_unlock(&us_ibdev->usdev_lock); 739 return -EINVAL; 740 } 741 bus_addr = bar->bus_addr; 742 len = bar->len; 743 usnic_dbg("bus: %pa vaddr: %p size: %ld\n", 744 &bus_addr, bar->vaddr, bar->len); 745 mutex_unlock(&us_ibdev->usdev_lock); 746 747 return remap_pfn_range(vma, 748 vma->vm_start, 749 bus_addr >> PAGE_SHIFT, 750 len, vma->vm_page_prot); 751 } 752 } 753 754 mutex_unlock(&us_ibdev->usdev_lock); 755 usnic_err("No VF %u found\n", vfid); 756 return -EINVAL; 757 } 758 759 /* In ib callbacks section - Start of stub funcs */ 760 struct ib_ah *usnic_ib_create_ah(struct ib_pd *pd, 761 struct rdma_ah_attr *ah_attr, 762 struct ib_udata *udata) 763 764 { 765 usnic_dbg("\n"); 766 return ERR_PTR(-EPERM); 767 } 768 769 int usnic_ib_destroy_ah(struct ib_ah *ah) 770 { 771 usnic_dbg("\n"); 772 return -EINVAL; 773 } 774 775 int usnic_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, 776 struct ib_send_wr **bad_wr) 777 { 778 usnic_dbg("\n"); 779 return -EINVAL; 780 } 781 782 int usnic_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr, 783 struct ib_recv_wr **bad_wr) 784 { 785 usnic_dbg("\n"); 786 return -EINVAL; 787 } 788 789 int usnic_ib_poll_cq(struct ib_cq *ibcq, int num_entries, 790 struct ib_wc *wc) 791 { 792 usnic_dbg("\n"); 793 return -EINVAL; 794 } 795 796 int usnic_ib_req_notify_cq(struct ib_cq *cq, 797 enum ib_cq_notify_flags flags) 798 { 799 usnic_dbg("\n"); 800 return -EINVAL; 801 } 802 803 struct ib_mr *usnic_ib_get_dma_mr(struct ib_pd *pd, int acc) 804 { 805 usnic_dbg("\n"); 806 return ERR_PTR(-ENOMEM); 807 } 808 809 810 /* In ib callbacks section - End of stub funcs */ 811 /* End of ib callbacks section */ 812