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