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", 163 dev_name(&us_ibdev->ib_dev.dev)); 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 dev_name(&us_ibdev->ib_dev.dev), 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", 235 dev_name(&us_ibdev->ib_dev.dev)); 236 return ERR_PTR(-ENOMEM); 237 238 qp_grp_check: 239 if (IS_ERR_OR_NULL(qp_grp)) { 240 usnic_err("Failed to allocate qp_grp\n"); 241 return ERR_PTR(qp_grp ? PTR_ERR(qp_grp) : -ENOMEM); 242 } 243 return qp_grp; 244 } 245 246 static void qp_grp_destroy(struct usnic_ib_qp_grp *qp_grp) 247 { 248 struct usnic_ib_vf *vf = qp_grp->vf; 249 250 WARN_ON(qp_grp->state != IB_QPS_RESET); 251 252 spin_lock(&vf->lock); 253 usnic_ib_qp_grp_destroy(qp_grp); 254 spin_unlock(&vf->lock); 255 } 256 257 static int create_qp_validate_user_data(struct usnic_ib_create_qp_cmd cmd) 258 { 259 if (cmd.spec.trans_type <= USNIC_TRANSPORT_UNKNOWN || 260 cmd.spec.trans_type >= USNIC_TRANSPORT_MAX) 261 return -EINVAL; 262 263 return 0; 264 } 265 266 /* Start of ib callback functions */ 267 268 enum rdma_link_layer usnic_ib_port_link_layer(struct ib_device *device, 269 u8 port_num) 270 { 271 return IB_LINK_LAYER_ETHERNET; 272 } 273 274 int usnic_ib_query_device(struct ib_device *ibdev, 275 struct ib_device_attr *props, 276 struct ib_udata *uhw) 277 { 278 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev); 279 union ib_gid gid; 280 struct ethtool_drvinfo info; 281 int qp_per_vf; 282 283 usnic_dbg("\n"); 284 if (uhw->inlen || uhw->outlen) 285 return -EINVAL; 286 287 mutex_lock(&us_ibdev->usdev_lock); 288 us_ibdev->netdev->ethtool_ops->get_drvinfo(us_ibdev->netdev, &info); 289 memset(props, 0, sizeof(*props)); 290 usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr, 291 &gid.raw[0]); 292 memcpy(&props->sys_image_guid, &gid.global.interface_id, 293 sizeof(gid.global.interface_id)); 294 usnic_ib_fw_string_to_u64(&info.fw_version[0], &props->fw_ver); 295 props->max_mr_size = USNIC_UIOM_MAX_MR_SIZE; 296 props->page_size_cap = USNIC_UIOM_PAGE_SIZE; 297 props->vendor_id = PCI_VENDOR_ID_CISCO; 298 props->vendor_part_id = PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC; 299 props->hw_ver = us_ibdev->pdev->subsystem_device; 300 qp_per_vf = max(us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_WQ], 301 us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_RQ]); 302 props->max_qp = qp_per_vf * 303 kref_read(&us_ibdev->vf_cnt); 304 props->device_cap_flags = IB_DEVICE_PORT_ACTIVE_EVENT | 305 IB_DEVICE_SYS_IMAGE_GUID | IB_DEVICE_BLOCK_MULTICAST_LOOPBACK; 306 props->max_cq = us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_CQ] * 307 kref_read(&us_ibdev->vf_cnt); 308 props->max_pd = USNIC_UIOM_MAX_PD_CNT; 309 props->max_mr = USNIC_UIOM_MAX_MR_CNT; 310 props->local_ca_ack_delay = 0; 311 props->max_pkeys = 0; 312 props->atomic_cap = IB_ATOMIC_NONE; 313 props->masked_atomic_cap = props->atomic_cap; 314 props->max_qp_rd_atom = 0; 315 props->max_qp_init_rd_atom = 0; 316 props->max_res_rd_atom = 0; 317 props->max_srq = 0; 318 props->max_srq_wr = 0; 319 props->max_srq_sge = 0; 320 props->max_fast_reg_page_list_len = 0; 321 props->max_mcast_grp = 0; 322 props->max_mcast_qp_attach = 0; 323 props->max_total_mcast_qp_attach = 0; 324 props->max_map_per_fmr = 0; 325 /* Owned by Userspace 326 * max_qp_wr, max_sge, max_sge_rd, max_cqe */ 327 mutex_unlock(&us_ibdev->usdev_lock); 328 329 return 0; 330 } 331 332 int usnic_ib_query_port(struct ib_device *ibdev, u8 port, 333 struct ib_port_attr *props) 334 { 335 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev); 336 337 usnic_dbg("\n"); 338 339 mutex_lock(&us_ibdev->usdev_lock); 340 if (ib_get_eth_speed(ibdev, port, &props->active_speed, 341 &props->active_width)) { 342 mutex_unlock(&us_ibdev->usdev_lock); 343 return -EINVAL; 344 } 345 346 /* props being zeroed by the caller, avoid zeroing it here */ 347 348 props->lid = 0; 349 props->lmc = 1; 350 props->sm_lid = 0; 351 props->sm_sl = 0; 352 353 if (!us_ibdev->ufdev->link_up) { 354 props->state = IB_PORT_DOWN; 355 props->phys_state = 3; 356 } else if (!us_ibdev->ufdev->inaddr) { 357 props->state = IB_PORT_INIT; 358 props->phys_state = 4; 359 } else { 360 props->state = IB_PORT_ACTIVE; 361 props->phys_state = 5; 362 } 363 364 props->port_cap_flags = 0; 365 props->gid_tbl_len = 1; 366 props->pkey_tbl_len = 1; 367 props->bad_pkey_cntr = 0; 368 props->qkey_viol_cntr = 0; 369 props->max_mtu = IB_MTU_4096; 370 props->active_mtu = iboe_get_mtu(us_ibdev->ufdev->mtu); 371 /* Userspace will adjust for hdrs */ 372 props->max_msg_sz = us_ibdev->ufdev->mtu; 373 props->max_vl_num = 1; 374 mutex_unlock(&us_ibdev->usdev_lock); 375 376 return 0; 377 } 378 379 int usnic_ib_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr, 380 int qp_attr_mask, 381 struct ib_qp_init_attr *qp_init_attr) 382 { 383 struct usnic_ib_qp_grp *qp_grp; 384 struct usnic_ib_vf *vf; 385 int err; 386 387 usnic_dbg("\n"); 388 389 memset(qp_attr, 0, sizeof(*qp_attr)); 390 memset(qp_init_attr, 0, sizeof(*qp_init_attr)); 391 392 qp_grp = to_uqp_grp(qp); 393 vf = qp_grp->vf; 394 mutex_lock(&vf->pf->usdev_lock); 395 usnic_dbg("\n"); 396 qp_attr->qp_state = qp_grp->state; 397 qp_attr->cur_qp_state = qp_grp->state; 398 399 switch (qp_grp->ibqp.qp_type) { 400 case IB_QPT_UD: 401 qp_attr->qkey = 0; 402 break; 403 default: 404 usnic_err("Unexpected qp_type %d\n", qp_grp->ibqp.qp_type); 405 err = -EINVAL; 406 goto err_out; 407 } 408 409 mutex_unlock(&vf->pf->usdev_lock); 410 return 0; 411 412 err_out: 413 mutex_unlock(&vf->pf->usdev_lock); 414 return err; 415 } 416 417 int usnic_ib_query_gid(struct ib_device *ibdev, u8 port, int index, 418 union ib_gid *gid) 419 { 420 421 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev); 422 usnic_dbg("\n"); 423 424 if (index > 1) 425 return -EINVAL; 426 427 mutex_lock(&us_ibdev->usdev_lock); 428 memset(&(gid->raw[0]), 0, sizeof(gid->raw)); 429 usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr, 430 &gid->raw[0]); 431 mutex_unlock(&us_ibdev->usdev_lock); 432 433 return 0; 434 } 435 436 struct net_device *usnic_get_netdev(struct ib_device *device, u8 port_num) 437 { 438 struct usnic_ib_dev *us_ibdev = to_usdev(device); 439 440 if (us_ibdev->netdev) 441 dev_hold(us_ibdev->netdev); 442 443 return us_ibdev->netdev; 444 } 445 446 int usnic_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index, 447 u16 *pkey) 448 { 449 if (index > 1) 450 return -EINVAL; 451 452 *pkey = 0xffff; 453 return 0; 454 } 455 456 struct ib_pd *usnic_ib_alloc_pd(struct ib_device *ibdev, 457 struct ib_ucontext *context, 458 struct ib_udata *udata) 459 { 460 struct usnic_ib_pd *pd; 461 void *umem_pd; 462 463 usnic_dbg("\n"); 464 465 pd = kzalloc(sizeof(*pd), GFP_KERNEL); 466 if (!pd) 467 return ERR_PTR(-ENOMEM); 468 469 umem_pd = pd->umem_pd = usnic_uiom_alloc_pd(); 470 if (IS_ERR_OR_NULL(umem_pd)) { 471 kfree(pd); 472 return ERR_PTR(umem_pd ? PTR_ERR(umem_pd) : -ENOMEM); 473 } 474 475 usnic_info("domain 0x%p allocated for context 0x%p and device %s\n", 476 pd, context, dev_name(&ibdev->dev)); 477 return &pd->ibpd; 478 } 479 480 int usnic_ib_dealloc_pd(struct ib_pd *pd) 481 { 482 usnic_info("freeing domain 0x%p\n", pd); 483 484 usnic_uiom_dealloc_pd((to_upd(pd))->umem_pd); 485 kfree(pd); 486 return 0; 487 } 488 489 struct ib_qp *usnic_ib_create_qp(struct ib_pd *pd, 490 struct ib_qp_init_attr *init_attr, 491 struct ib_udata *udata) 492 { 493 int err; 494 struct usnic_ib_dev *us_ibdev; 495 struct usnic_ib_qp_grp *qp_grp; 496 struct usnic_ib_ucontext *ucontext; 497 int cq_cnt; 498 struct usnic_vnic_res_spec res_spec; 499 struct usnic_ib_create_qp_cmd cmd; 500 struct usnic_transport_spec trans_spec; 501 502 usnic_dbg("\n"); 503 504 ucontext = to_uucontext(pd->uobject->context); 505 us_ibdev = to_usdev(pd->device); 506 507 if (init_attr->create_flags) 508 return ERR_PTR(-EINVAL); 509 510 err = ib_copy_from_udata(&cmd, udata, sizeof(cmd)); 511 if (err) { 512 usnic_err("%s: cannot copy udata for create_qp\n", 513 dev_name(&us_ibdev->ib_dev.dev)); 514 return ERR_PTR(-EINVAL); 515 } 516 517 err = create_qp_validate_user_data(cmd); 518 if (err) { 519 usnic_err("%s: Failed to validate user data\n", 520 dev_name(&us_ibdev->ib_dev.dev)); 521 return ERR_PTR(-EINVAL); 522 } 523 524 if (init_attr->qp_type != IB_QPT_UD) { 525 usnic_err("%s asked to make a non-UD QP: %d\n", 526 dev_name(&us_ibdev->ib_dev.dev), init_attr->qp_type); 527 return ERR_PTR(-EINVAL); 528 } 529 530 trans_spec = cmd.spec; 531 mutex_lock(&us_ibdev->usdev_lock); 532 cq_cnt = (init_attr->send_cq == init_attr->recv_cq) ? 1 : 2; 533 res_spec = min_transport_spec[trans_spec.trans_type]; 534 usnic_vnic_res_spec_update(&res_spec, USNIC_VNIC_RES_TYPE_CQ, cq_cnt); 535 qp_grp = find_free_vf_and_create_qp_grp(us_ibdev, to_upd(pd), 536 &trans_spec, 537 &res_spec); 538 if (IS_ERR_OR_NULL(qp_grp)) { 539 err = qp_grp ? PTR_ERR(qp_grp) : -ENOMEM; 540 goto out_release_mutex; 541 } 542 543 err = usnic_ib_fill_create_qp_resp(qp_grp, udata); 544 if (err) { 545 err = -EBUSY; 546 goto out_release_qp_grp; 547 } 548 549 qp_grp->ctx = ucontext; 550 list_add_tail(&qp_grp->link, &ucontext->qp_grp_list); 551 usnic_ib_log_vf(qp_grp->vf); 552 mutex_unlock(&us_ibdev->usdev_lock); 553 return &qp_grp->ibqp; 554 555 out_release_qp_grp: 556 qp_grp_destroy(qp_grp); 557 out_release_mutex: 558 mutex_unlock(&us_ibdev->usdev_lock); 559 return ERR_PTR(err); 560 } 561 562 int usnic_ib_destroy_qp(struct ib_qp *qp) 563 { 564 struct usnic_ib_qp_grp *qp_grp; 565 struct usnic_ib_vf *vf; 566 567 usnic_dbg("\n"); 568 569 qp_grp = to_uqp_grp(qp); 570 vf = qp_grp->vf; 571 mutex_lock(&vf->pf->usdev_lock); 572 if (usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RESET, NULL)) { 573 usnic_err("Failed to move qp grp %u to reset\n", 574 qp_grp->grp_id); 575 } 576 577 list_del(&qp_grp->link); 578 qp_grp_destroy(qp_grp); 579 mutex_unlock(&vf->pf->usdev_lock); 580 581 return 0; 582 } 583 584 int usnic_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 585 int attr_mask, struct ib_udata *udata) 586 { 587 struct usnic_ib_qp_grp *qp_grp; 588 int status; 589 usnic_dbg("\n"); 590 591 qp_grp = to_uqp_grp(ibqp); 592 593 mutex_lock(&qp_grp->vf->pf->usdev_lock); 594 if ((attr_mask & IB_QP_PORT) && attr->port_num != 1) { 595 /* usnic devices only have one port */ 596 status = -EINVAL; 597 goto out_unlock; 598 } 599 if (attr_mask & IB_QP_STATE) { 600 status = usnic_ib_qp_grp_modify(qp_grp, attr->qp_state, NULL); 601 } else { 602 usnic_err("Unhandled request, attr_mask=0x%x\n", attr_mask); 603 status = -EINVAL; 604 } 605 606 out_unlock: 607 mutex_unlock(&qp_grp->vf->pf->usdev_lock); 608 return status; 609 } 610 611 struct ib_cq *usnic_ib_create_cq(struct ib_device *ibdev, 612 const struct ib_cq_init_attr *attr, 613 struct ib_ucontext *context, 614 struct ib_udata *udata) 615 { 616 struct ib_cq *cq; 617 618 usnic_dbg("\n"); 619 if (attr->flags) 620 return ERR_PTR(-EINVAL); 621 622 cq = kzalloc(sizeof(*cq), GFP_KERNEL); 623 if (!cq) 624 return ERR_PTR(-EBUSY); 625 626 return cq; 627 } 628 629 int usnic_ib_destroy_cq(struct ib_cq *cq) 630 { 631 usnic_dbg("\n"); 632 kfree(cq); 633 return 0; 634 } 635 636 struct ib_mr *usnic_ib_reg_mr(struct ib_pd *pd, u64 start, u64 length, 637 u64 virt_addr, int access_flags, 638 struct ib_udata *udata) 639 { 640 struct usnic_ib_mr *mr; 641 int err; 642 643 usnic_dbg("start 0x%llx va 0x%llx length 0x%llx\n", start, 644 virt_addr, length); 645 646 mr = kzalloc(sizeof(*mr), GFP_KERNEL); 647 if (!mr) 648 return ERR_PTR(-ENOMEM); 649 650 mr->umem = usnic_uiom_reg_get(to_upd(pd)->umem_pd, start, length, 651 access_flags, 0); 652 if (IS_ERR_OR_NULL(mr->umem)) { 653 err = mr->umem ? PTR_ERR(mr->umem) : -EFAULT; 654 goto err_free; 655 } 656 657 mr->ibmr.lkey = mr->ibmr.rkey = 0; 658 return &mr->ibmr; 659 660 err_free: 661 kfree(mr); 662 return ERR_PTR(err); 663 } 664 665 int usnic_ib_dereg_mr(struct ib_mr *ibmr) 666 { 667 struct usnic_ib_mr *mr = to_umr(ibmr); 668 669 usnic_dbg("va 0x%lx length 0x%zx\n", mr->umem->va, mr->umem->length); 670 671 usnic_uiom_reg_release(mr->umem, ibmr->uobject->context); 672 kfree(mr); 673 return 0; 674 } 675 676 struct ib_ucontext *usnic_ib_alloc_ucontext(struct ib_device *ibdev, 677 struct ib_udata *udata) 678 { 679 struct usnic_ib_ucontext *context; 680 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev); 681 usnic_dbg("\n"); 682 683 context = kmalloc(sizeof(*context), GFP_KERNEL); 684 if (!context) 685 return ERR_PTR(-ENOMEM); 686 687 INIT_LIST_HEAD(&context->qp_grp_list); 688 mutex_lock(&us_ibdev->usdev_lock); 689 list_add_tail(&context->link, &us_ibdev->ctx_list); 690 mutex_unlock(&us_ibdev->usdev_lock); 691 692 return &context->ibucontext; 693 } 694 695 int usnic_ib_dealloc_ucontext(struct ib_ucontext *ibcontext) 696 { 697 struct usnic_ib_ucontext *context = to_uucontext(ibcontext); 698 struct usnic_ib_dev *us_ibdev = to_usdev(ibcontext->device); 699 usnic_dbg("\n"); 700 701 mutex_lock(&us_ibdev->usdev_lock); 702 BUG_ON(!list_empty(&context->qp_grp_list)); 703 list_del(&context->link); 704 mutex_unlock(&us_ibdev->usdev_lock); 705 kfree(context); 706 return 0; 707 } 708 709 int usnic_ib_mmap(struct ib_ucontext *context, 710 struct vm_area_struct *vma) 711 { 712 struct usnic_ib_ucontext *uctx = to_ucontext(context); 713 struct usnic_ib_dev *us_ibdev; 714 struct usnic_ib_qp_grp *qp_grp; 715 struct usnic_ib_vf *vf; 716 struct vnic_dev_bar *bar; 717 dma_addr_t bus_addr; 718 unsigned int len; 719 unsigned int vfid; 720 721 usnic_dbg("\n"); 722 723 us_ibdev = to_usdev(context->device); 724 vma->vm_flags |= VM_IO; 725 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 726 vfid = vma->vm_pgoff; 727 usnic_dbg("Page Offset %lu PAGE_SHIFT %u VFID %u\n", 728 vma->vm_pgoff, PAGE_SHIFT, vfid); 729 730 mutex_lock(&us_ibdev->usdev_lock); 731 list_for_each_entry(qp_grp, &uctx->qp_grp_list, link) { 732 vf = qp_grp->vf; 733 if (usnic_vnic_get_index(vf->vnic) == vfid) { 734 bar = usnic_vnic_get_bar(vf->vnic, 0); 735 if ((vma->vm_end - vma->vm_start) != bar->len) { 736 usnic_err("Bar0 Len %lu - Request map %lu\n", 737 bar->len, 738 vma->vm_end - vma->vm_start); 739 mutex_unlock(&us_ibdev->usdev_lock); 740 return -EINVAL; 741 } 742 bus_addr = bar->bus_addr; 743 len = bar->len; 744 usnic_dbg("bus: %pa vaddr: %p size: %ld\n", 745 &bus_addr, bar->vaddr, bar->len); 746 mutex_unlock(&us_ibdev->usdev_lock); 747 748 return remap_pfn_range(vma, 749 vma->vm_start, 750 bus_addr >> PAGE_SHIFT, 751 len, vma->vm_page_prot); 752 } 753 } 754 755 mutex_unlock(&us_ibdev->usdev_lock); 756 usnic_err("No VF %u found\n", vfid); 757 return -EINVAL; 758 } 759 760 /* In ib callbacks section - Start of stub funcs */ 761 struct ib_ah *usnic_ib_create_ah(struct ib_pd *pd, 762 struct rdma_ah_attr *ah_attr, 763 struct ib_udata *udata) 764 765 { 766 usnic_dbg("\n"); 767 return ERR_PTR(-EPERM); 768 } 769 770 int usnic_ib_destroy_ah(struct ib_ah *ah) 771 { 772 usnic_dbg("\n"); 773 return -EINVAL; 774 } 775 776 int usnic_ib_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, 777 const struct ib_send_wr **bad_wr) 778 { 779 usnic_dbg("\n"); 780 return -EINVAL; 781 } 782 783 int usnic_ib_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr, 784 const struct ib_recv_wr **bad_wr) 785 { 786 usnic_dbg("\n"); 787 return -EINVAL; 788 } 789 790 int usnic_ib_poll_cq(struct ib_cq *ibcq, int num_entries, 791 struct ib_wc *wc) 792 { 793 usnic_dbg("\n"); 794 return -EINVAL; 795 } 796 797 int usnic_ib_req_notify_cq(struct ib_cq *cq, 798 enum ib_cq_notify_flags flags) 799 { 800 usnic_dbg("\n"); 801 return -EINVAL; 802 } 803 804 struct ib_mr *usnic_ib_get_dma_mr(struct ib_pd *pd, int acc) 805 { 806 usnic_dbg("\n"); 807 return ERR_PTR(-ENOMEM); 808 } 809 810 811 /* In ib callbacks section - End of stub funcs */ 812 /* End of ib callbacks section */ 813