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 if (ib_get_eth_speed(ibdev, port, &props->active_speed, 340 &props->active_width)) 341 return -EINVAL; 342 343 /* 344 * usdev_lock is acquired after (and not before) ib_get_eth_speed call 345 * because acquiring rtnl_lock in ib_get_eth_speed, while holding 346 * usdev_lock could lead to a deadlock. 347 */ 348 mutex_lock(&us_ibdev->usdev_lock); 349 /* props being zeroed by the caller, avoid zeroing it here */ 350 351 props->lid = 0; 352 props->lmc = 1; 353 props->sm_lid = 0; 354 props->sm_sl = 0; 355 356 if (!us_ibdev->ufdev->link_up) { 357 props->state = IB_PORT_DOWN; 358 props->phys_state = 3; 359 } else if (!us_ibdev->ufdev->inaddr) { 360 props->state = IB_PORT_INIT; 361 props->phys_state = 4; 362 } else { 363 props->state = IB_PORT_ACTIVE; 364 props->phys_state = 5; 365 } 366 367 props->port_cap_flags = 0; 368 props->gid_tbl_len = 1; 369 props->pkey_tbl_len = 1; 370 props->bad_pkey_cntr = 0; 371 props->qkey_viol_cntr = 0; 372 props->max_mtu = IB_MTU_4096; 373 props->active_mtu = iboe_get_mtu(us_ibdev->ufdev->mtu); 374 /* Userspace will adjust for hdrs */ 375 props->max_msg_sz = us_ibdev->ufdev->mtu; 376 props->max_vl_num = 1; 377 mutex_unlock(&us_ibdev->usdev_lock); 378 379 return 0; 380 } 381 382 int usnic_ib_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr, 383 int qp_attr_mask, 384 struct ib_qp_init_attr *qp_init_attr) 385 { 386 struct usnic_ib_qp_grp *qp_grp; 387 struct usnic_ib_vf *vf; 388 int err; 389 390 usnic_dbg("\n"); 391 392 memset(qp_attr, 0, sizeof(*qp_attr)); 393 memset(qp_init_attr, 0, sizeof(*qp_init_attr)); 394 395 qp_grp = to_uqp_grp(qp); 396 vf = qp_grp->vf; 397 mutex_lock(&vf->pf->usdev_lock); 398 usnic_dbg("\n"); 399 qp_attr->qp_state = qp_grp->state; 400 qp_attr->cur_qp_state = qp_grp->state; 401 402 switch (qp_grp->ibqp.qp_type) { 403 case IB_QPT_UD: 404 qp_attr->qkey = 0; 405 break; 406 default: 407 usnic_err("Unexpected qp_type %d\n", qp_grp->ibqp.qp_type); 408 err = -EINVAL; 409 goto err_out; 410 } 411 412 mutex_unlock(&vf->pf->usdev_lock); 413 return 0; 414 415 err_out: 416 mutex_unlock(&vf->pf->usdev_lock); 417 return err; 418 } 419 420 int usnic_ib_query_gid(struct ib_device *ibdev, u8 port, int index, 421 union ib_gid *gid) 422 { 423 424 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev); 425 usnic_dbg("\n"); 426 427 if (index > 1) 428 return -EINVAL; 429 430 mutex_lock(&us_ibdev->usdev_lock); 431 memset(&(gid->raw[0]), 0, sizeof(gid->raw)); 432 usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr, 433 &gid->raw[0]); 434 mutex_unlock(&us_ibdev->usdev_lock); 435 436 return 0; 437 } 438 439 struct net_device *usnic_get_netdev(struct ib_device *device, u8 port_num) 440 { 441 struct usnic_ib_dev *us_ibdev = to_usdev(device); 442 443 if (us_ibdev->netdev) 444 dev_hold(us_ibdev->netdev); 445 446 return us_ibdev->netdev; 447 } 448 449 int usnic_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index, 450 u16 *pkey) 451 { 452 if (index > 1) 453 return -EINVAL; 454 455 *pkey = 0xffff; 456 return 0; 457 } 458 459 struct ib_pd *usnic_ib_alloc_pd(struct ib_device *ibdev, 460 struct ib_ucontext *context, 461 struct ib_udata *udata) 462 { 463 struct usnic_ib_pd *pd; 464 void *umem_pd; 465 466 usnic_dbg("\n"); 467 468 pd = kzalloc(sizeof(*pd), GFP_KERNEL); 469 if (!pd) 470 return ERR_PTR(-ENOMEM); 471 472 umem_pd = pd->umem_pd = usnic_uiom_alloc_pd(); 473 if (IS_ERR_OR_NULL(umem_pd)) { 474 kfree(pd); 475 return ERR_PTR(umem_pd ? PTR_ERR(umem_pd) : -ENOMEM); 476 } 477 478 usnic_info("domain 0x%p allocated for context 0x%p and device %s\n", 479 pd, context, dev_name(&ibdev->dev)); 480 return &pd->ibpd; 481 } 482 483 int usnic_ib_dealloc_pd(struct ib_pd *pd) 484 { 485 usnic_info("freeing domain 0x%p\n", pd); 486 487 usnic_uiom_dealloc_pd((to_upd(pd))->umem_pd); 488 kfree(pd); 489 return 0; 490 } 491 492 struct ib_qp *usnic_ib_create_qp(struct ib_pd *pd, 493 struct ib_qp_init_attr *init_attr, 494 struct ib_udata *udata) 495 { 496 int err; 497 struct usnic_ib_dev *us_ibdev; 498 struct usnic_ib_qp_grp *qp_grp; 499 struct usnic_ib_ucontext *ucontext; 500 int cq_cnt; 501 struct usnic_vnic_res_spec res_spec; 502 struct usnic_ib_create_qp_cmd cmd; 503 struct usnic_transport_spec trans_spec; 504 505 usnic_dbg("\n"); 506 507 ucontext = to_uucontext(pd->uobject->context); 508 us_ibdev = to_usdev(pd->device); 509 510 if (init_attr->create_flags) 511 return ERR_PTR(-EINVAL); 512 513 err = ib_copy_from_udata(&cmd, udata, sizeof(cmd)); 514 if (err) { 515 usnic_err("%s: cannot copy udata for create_qp\n", 516 dev_name(&us_ibdev->ib_dev.dev)); 517 return ERR_PTR(-EINVAL); 518 } 519 520 err = create_qp_validate_user_data(cmd); 521 if (err) { 522 usnic_err("%s: Failed to validate user data\n", 523 dev_name(&us_ibdev->ib_dev.dev)); 524 return ERR_PTR(-EINVAL); 525 } 526 527 if (init_attr->qp_type != IB_QPT_UD) { 528 usnic_err("%s asked to make a non-UD QP: %d\n", 529 dev_name(&us_ibdev->ib_dev.dev), init_attr->qp_type); 530 return ERR_PTR(-EINVAL); 531 } 532 533 trans_spec = cmd.spec; 534 mutex_lock(&us_ibdev->usdev_lock); 535 cq_cnt = (init_attr->send_cq == init_attr->recv_cq) ? 1 : 2; 536 res_spec = min_transport_spec[trans_spec.trans_type]; 537 usnic_vnic_res_spec_update(&res_spec, USNIC_VNIC_RES_TYPE_CQ, cq_cnt); 538 qp_grp = find_free_vf_and_create_qp_grp(us_ibdev, to_upd(pd), 539 &trans_spec, 540 &res_spec); 541 if (IS_ERR_OR_NULL(qp_grp)) { 542 err = qp_grp ? PTR_ERR(qp_grp) : -ENOMEM; 543 goto out_release_mutex; 544 } 545 546 err = usnic_ib_fill_create_qp_resp(qp_grp, udata); 547 if (err) { 548 err = -EBUSY; 549 goto out_release_qp_grp; 550 } 551 552 qp_grp->ctx = ucontext; 553 list_add_tail(&qp_grp->link, &ucontext->qp_grp_list); 554 usnic_ib_log_vf(qp_grp->vf); 555 mutex_unlock(&us_ibdev->usdev_lock); 556 return &qp_grp->ibqp; 557 558 out_release_qp_grp: 559 qp_grp_destroy(qp_grp); 560 out_release_mutex: 561 mutex_unlock(&us_ibdev->usdev_lock); 562 return ERR_PTR(err); 563 } 564 565 int usnic_ib_destroy_qp(struct ib_qp *qp) 566 { 567 struct usnic_ib_qp_grp *qp_grp; 568 struct usnic_ib_vf *vf; 569 570 usnic_dbg("\n"); 571 572 qp_grp = to_uqp_grp(qp); 573 vf = qp_grp->vf; 574 mutex_lock(&vf->pf->usdev_lock); 575 if (usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RESET, NULL)) { 576 usnic_err("Failed to move qp grp %u to reset\n", 577 qp_grp->grp_id); 578 } 579 580 list_del(&qp_grp->link); 581 qp_grp_destroy(qp_grp); 582 mutex_unlock(&vf->pf->usdev_lock); 583 584 return 0; 585 } 586 587 int usnic_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 588 int attr_mask, struct ib_udata *udata) 589 { 590 struct usnic_ib_qp_grp *qp_grp; 591 int status; 592 usnic_dbg("\n"); 593 594 qp_grp = to_uqp_grp(ibqp); 595 596 mutex_lock(&qp_grp->vf->pf->usdev_lock); 597 if ((attr_mask & IB_QP_PORT) && attr->port_num != 1) { 598 /* usnic devices only have one port */ 599 status = -EINVAL; 600 goto out_unlock; 601 } 602 if (attr_mask & IB_QP_STATE) { 603 status = usnic_ib_qp_grp_modify(qp_grp, attr->qp_state, NULL); 604 } else { 605 usnic_err("Unhandled request, attr_mask=0x%x\n", attr_mask); 606 status = -EINVAL; 607 } 608 609 out_unlock: 610 mutex_unlock(&qp_grp->vf->pf->usdev_lock); 611 return status; 612 } 613 614 struct ib_cq *usnic_ib_create_cq(struct ib_device *ibdev, 615 const struct ib_cq_init_attr *attr, 616 struct ib_ucontext *context, 617 struct ib_udata *udata) 618 { 619 struct ib_cq *cq; 620 621 usnic_dbg("\n"); 622 if (attr->flags) 623 return ERR_PTR(-EINVAL); 624 625 cq = kzalloc(sizeof(*cq), GFP_KERNEL); 626 if (!cq) 627 return ERR_PTR(-EBUSY); 628 629 return cq; 630 } 631 632 int usnic_ib_destroy_cq(struct ib_cq *cq) 633 { 634 usnic_dbg("\n"); 635 kfree(cq); 636 return 0; 637 } 638 639 struct ib_mr *usnic_ib_reg_mr(struct ib_pd *pd, u64 start, u64 length, 640 u64 virt_addr, int access_flags, 641 struct ib_udata *udata) 642 { 643 struct usnic_ib_mr *mr; 644 int err; 645 646 usnic_dbg("start 0x%llx va 0x%llx length 0x%llx\n", start, 647 virt_addr, length); 648 649 mr = kzalloc(sizeof(*mr), GFP_KERNEL); 650 if (!mr) 651 return ERR_PTR(-ENOMEM); 652 653 mr->umem = usnic_uiom_reg_get(to_upd(pd)->umem_pd, start, length, 654 access_flags, 0); 655 if (IS_ERR_OR_NULL(mr->umem)) { 656 err = mr->umem ? PTR_ERR(mr->umem) : -EFAULT; 657 goto err_free; 658 } 659 660 mr->ibmr.lkey = mr->ibmr.rkey = 0; 661 return &mr->ibmr; 662 663 err_free: 664 kfree(mr); 665 return ERR_PTR(err); 666 } 667 668 int usnic_ib_dereg_mr(struct ib_mr *ibmr) 669 { 670 struct usnic_ib_mr *mr = to_umr(ibmr); 671 672 usnic_dbg("va 0x%lx length 0x%zx\n", mr->umem->va, mr->umem->length); 673 674 usnic_uiom_reg_release(mr->umem, ibmr->uobject->context); 675 kfree(mr); 676 return 0; 677 } 678 679 struct ib_ucontext *usnic_ib_alloc_ucontext(struct ib_device *ibdev, 680 struct ib_udata *udata) 681 { 682 struct usnic_ib_ucontext *context; 683 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev); 684 usnic_dbg("\n"); 685 686 context = kmalloc(sizeof(*context), GFP_KERNEL); 687 if (!context) 688 return ERR_PTR(-ENOMEM); 689 690 INIT_LIST_HEAD(&context->qp_grp_list); 691 mutex_lock(&us_ibdev->usdev_lock); 692 list_add_tail(&context->link, &us_ibdev->ctx_list); 693 mutex_unlock(&us_ibdev->usdev_lock); 694 695 return &context->ibucontext; 696 } 697 698 int usnic_ib_dealloc_ucontext(struct ib_ucontext *ibcontext) 699 { 700 struct usnic_ib_ucontext *context = to_uucontext(ibcontext); 701 struct usnic_ib_dev *us_ibdev = to_usdev(ibcontext->device); 702 usnic_dbg("\n"); 703 704 mutex_lock(&us_ibdev->usdev_lock); 705 BUG_ON(!list_empty(&context->qp_grp_list)); 706 list_del(&context->link); 707 mutex_unlock(&us_ibdev->usdev_lock); 708 kfree(context); 709 return 0; 710 } 711 712 int usnic_ib_mmap(struct ib_ucontext *context, 713 struct vm_area_struct *vma) 714 { 715 struct usnic_ib_ucontext *uctx = to_ucontext(context); 716 struct usnic_ib_dev *us_ibdev; 717 struct usnic_ib_qp_grp *qp_grp; 718 struct usnic_ib_vf *vf; 719 struct vnic_dev_bar *bar; 720 dma_addr_t bus_addr; 721 unsigned int len; 722 unsigned int vfid; 723 724 usnic_dbg("\n"); 725 726 us_ibdev = to_usdev(context->device); 727 vma->vm_flags |= VM_IO; 728 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 729 vfid = vma->vm_pgoff; 730 usnic_dbg("Page Offset %lu PAGE_SHIFT %u VFID %u\n", 731 vma->vm_pgoff, PAGE_SHIFT, vfid); 732 733 mutex_lock(&us_ibdev->usdev_lock); 734 list_for_each_entry(qp_grp, &uctx->qp_grp_list, link) { 735 vf = qp_grp->vf; 736 if (usnic_vnic_get_index(vf->vnic) == vfid) { 737 bar = usnic_vnic_get_bar(vf->vnic, 0); 738 if ((vma->vm_end - vma->vm_start) != bar->len) { 739 usnic_err("Bar0 Len %lu - Request map %lu\n", 740 bar->len, 741 vma->vm_end - vma->vm_start); 742 mutex_unlock(&us_ibdev->usdev_lock); 743 return -EINVAL; 744 } 745 bus_addr = bar->bus_addr; 746 len = bar->len; 747 usnic_dbg("bus: %pa vaddr: %p size: %ld\n", 748 &bus_addr, bar->vaddr, bar->len); 749 mutex_unlock(&us_ibdev->usdev_lock); 750 751 return remap_pfn_range(vma, 752 vma->vm_start, 753 bus_addr >> PAGE_SHIFT, 754 len, vma->vm_page_prot); 755 } 756 } 757 758 mutex_unlock(&us_ibdev->usdev_lock); 759 usnic_err("No VF %u found\n", vfid); 760 return -EINVAL; 761 } 762 763 /* In ib callbacks section - Start of stub funcs */ 764 struct ib_ah *usnic_ib_create_ah(struct ib_pd *pd, 765 struct rdma_ah_attr *ah_attr, 766 u32 flags, 767 struct ib_udata *udata) 768 769 { 770 usnic_dbg("\n"); 771 return ERR_PTR(-EPERM); 772 } 773 774 int usnic_ib_destroy_ah(struct ib_ah *ah, u32 flags) 775 { 776 usnic_dbg("\n"); 777 return -EINVAL; 778 } 779 780 int usnic_ib_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, 781 const struct ib_send_wr **bad_wr) 782 { 783 usnic_dbg("\n"); 784 return -EINVAL; 785 } 786 787 int usnic_ib_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr, 788 const struct ib_recv_wr **bad_wr) 789 { 790 usnic_dbg("\n"); 791 return -EINVAL; 792 } 793 794 int usnic_ib_poll_cq(struct ib_cq *ibcq, int num_entries, 795 struct ib_wc *wc) 796 { 797 usnic_dbg("\n"); 798 return -EINVAL; 799 } 800 801 int usnic_ib_req_notify_cq(struct ib_cq *cq, 802 enum ib_cq_notify_flags flags) 803 { 804 usnic_dbg("\n"); 805 return -EINVAL; 806 } 807 808 struct ib_mr *usnic_ib_get_dma_mr(struct ib_pd *pd, int acc) 809 { 810 usnic_dbg("\n"); 811 return ERR_PTR(-ENOMEM); 812 } 813 814 815 /* In ib callbacks section - End of stub funcs */ 816 /* End of ib callbacks section */ 817