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/init.h> 34#include <linux/slab.h> 35#include <linux/errno.h> 36 37#include <rdma/ib_user_verbs.h> 38#include <rdma/ib_addr.h> 39#include <rdma/uverbs_ioctl.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 53const 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 77static void usnic_ib_fw_string_to_u64(char *fw_ver_str, u64 *fw_ver) 78{ 79 *fw_ver = *((u64 *)fw_ver_str); 80} 81 82static 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 170static int 171find_free_vf_and_create_qp_grp(struct ib_qp *qp, 172 struct usnic_transport_spec *trans_spec, 173 struct usnic_vnic_res_spec *res_spec) 174{ 175 struct usnic_ib_dev *us_ibdev = to_usdev(qp->device); 176 struct usnic_ib_pd *pd = to_upd(qp->pd); 177 struct usnic_ib_vf *vf; 178 struct usnic_vnic *vnic; 179 struct usnic_ib_qp_grp *qp_grp = to_uqp_grp(qp); 180 struct device *dev, **dev_list; 181 int i, ret; 182 183 BUG_ON(!mutex_is_locked(&us_ibdev->usdev_lock)); 184 185 if (list_empty(&us_ibdev->vf_dev_list)) { 186 usnic_info("No vfs to allocate\n"); 187 return -ENOMEM; 188 } 189 190 if (usnic_ib_share_vf) { 191 /* Try to find resouces on a used vf which is in pd */ 192 dev_list = usnic_uiom_get_dev_list(pd->umem_pd); 193 if (IS_ERR(dev_list)) 194 return PTR_ERR(dev_list); 195 for (i = 0; dev_list[i]; i++) { 196 dev = dev_list[i]; 197 vf = dev_get_drvdata(dev); 198 mutex_lock(&vf->lock); 199 vnic = vf->vnic; 200 if (!usnic_vnic_check_room(vnic, res_spec)) { 201 usnic_dbg("Found used vnic %s from %s\n", 202 dev_name(&us_ibdev->ib_dev.dev), 203 pci_name(usnic_vnic_get_pdev( 204 vnic))); 205 ret = usnic_ib_qp_grp_create(qp_grp, 206 us_ibdev->ufdev, 207 vf, pd, res_spec, 208 trans_spec); 209 210 mutex_unlock(&vf->lock); 211 goto qp_grp_check; 212 } 213 mutex_unlock(&vf->lock); 214 215 } 216 usnic_uiom_free_dev_list(dev_list); 217 dev_list = NULL; 218 } 219 220 /* Try to find resources on an unused vf */ 221 list_for_each_entry(vf, &us_ibdev->vf_dev_list, link) { 222 mutex_lock(&vf->lock); 223 vnic = vf->vnic; 224 if (vf->qp_grp_ref_cnt == 0 && 225 usnic_vnic_check_room(vnic, res_spec) == 0) { 226 ret = usnic_ib_qp_grp_create(qp_grp, us_ibdev->ufdev, 227 vf, pd, res_spec, 228 trans_spec); 229 230 mutex_unlock(&vf->lock); 231 goto qp_grp_check; 232 } 233 mutex_unlock(&vf->lock); 234 } 235 236 usnic_info("No free qp grp found on %s\n", 237 dev_name(&us_ibdev->ib_dev.dev)); 238 return -ENOMEM; 239 240qp_grp_check: 241 if (ret) { 242 usnic_err("Failed to allocate qp_grp\n"); 243 if (usnic_ib_share_vf) 244 usnic_uiom_free_dev_list(dev_list); 245 } 246 return ret; 247} 248 249static void qp_grp_destroy(struct usnic_ib_qp_grp *qp_grp) 250{ 251 struct usnic_ib_vf *vf = qp_grp->vf; 252 253 WARN_ON(qp_grp->state != IB_QPS_RESET); 254 255 mutex_lock(&vf->lock); 256 usnic_ib_qp_grp_destroy(qp_grp); 257 mutex_unlock(&vf->lock); 258} 259 260static int create_qp_validate_user_data(struct usnic_ib_create_qp_cmd cmd) 261{ 262 if (cmd.spec.trans_type <= USNIC_TRANSPORT_UNKNOWN || 263 cmd.spec.trans_type >= USNIC_TRANSPORT_MAX) 264 return -EINVAL; 265 266 return 0; 267} 268 269/* Start of ib callback functions */ 270 271enum rdma_link_layer usnic_ib_port_link_layer(struct ib_device *device, 272 u32 port_num) 273{ 274 return IB_LINK_LAYER_ETHERNET; 275} 276 277int usnic_ib_query_device(struct ib_device *ibdev, 278 struct ib_device_attr *props, 279 struct ib_udata *uhw) 280{ 281 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev); 282 union ib_gid gid; 283 struct ethtool_drvinfo info; 284 int qp_per_vf; 285 286 usnic_dbg("\n"); 287 if (uhw->inlen || uhw->outlen) 288 return -EINVAL; 289 290 mutex_lock(&us_ibdev->usdev_lock); 291 us_ibdev->netdev->ethtool_ops->get_drvinfo(us_ibdev->netdev, &info); 292 memset(props, 0, sizeof(*props)); 293 usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr, 294 &gid.raw[0]); 295 memcpy(&props->sys_image_guid, &gid.global.interface_id, 296 sizeof(gid.global.interface_id)); 297 usnic_ib_fw_string_to_u64(&info.fw_version[0], &props->fw_ver); 298 props->max_mr_size = USNIC_UIOM_MAX_MR_SIZE; 299 props->page_size_cap = USNIC_UIOM_PAGE_SIZE; 300 props->vendor_id = PCI_VENDOR_ID_CISCO; 301 props->vendor_part_id = PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC; 302 props->hw_ver = us_ibdev->pdev->subsystem_device; 303 qp_per_vf = max(us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_WQ], 304 us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_RQ]); 305 props->max_qp = qp_per_vf * 306 kref_read(&us_ibdev->vf_cnt); 307 props->device_cap_flags = IB_DEVICE_PORT_ACTIVE_EVENT | 308 IB_DEVICE_SYS_IMAGE_GUID; 309 props->kernel_cap_flags = IBK_BLOCK_MULTICAST_LOOPBACK; 310 props->max_cq = us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_CQ] * 311 kref_read(&us_ibdev->vf_cnt); 312 props->max_pd = USNIC_UIOM_MAX_PD_CNT; 313 props->max_mr = USNIC_UIOM_MAX_MR_CNT; 314 props->local_ca_ack_delay = 0; 315 props->max_pkeys = 0; 316 props->atomic_cap = IB_ATOMIC_NONE; 317 props->masked_atomic_cap = props->atomic_cap; 318 props->max_qp_rd_atom = 0; 319 props->max_qp_init_rd_atom = 0; 320 props->max_res_rd_atom = 0; 321 props->max_srq = 0; 322 props->max_srq_wr = 0; 323 props->max_srq_sge = 0; 324 props->max_fast_reg_page_list_len = 0; 325 props->max_mcast_grp = 0; 326 props->max_mcast_qp_attach = 0; 327 props->max_total_mcast_qp_attach = 0; 328 /* Owned by Userspace 329 * max_qp_wr, max_sge, max_sge_rd, max_cqe */ 330 mutex_unlock(&us_ibdev->usdev_lock); 331 332 return 0; 333} 334 335int usnic_ib_query_port(struct ib_device *ibdev, u32 port, 336 struct ib_port_attr *props) 337{ 338 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev); 339 340 usnic_dbg("\n"); 341 342 if (ib_get_eth_speed(ibdev, port, &props->active_speed, 343 &props->active_width)) 344 return -EINVAL; 345 346 /* 347 * usdev_lock is acquired after (and not before) ib_get_eth_speed call 348 * because acquiring rtnl_lock in ib_get_eth_speed, while holding 349 * usdev_lock could lead to a deadlock. 350 */ 351 mutex_lock(&us_ibdev->usdev_lock); 352 /* props being zeroed by the caller, avoid zeroing it here */ 353 354 props->lid = 0; 355 props->lmc = 1; 356 props->sm_lid = 0; 357 props->sm_sl = 0; 358 359 if (!us_ibdev->ufdev->link_up) { 360 props->state = IB_PORT_DOWN; 361 props->phys_state = IB_PORT_PHYS_STATE_DISABLED; 362 } else if (!us_ibdev->ufdev->inaddr) { 363 props->state = IB_PORT_INIT; 364 props->phys_state = 365 IB_PORT_PHYS_STATE_PORT_CONFIGURATION_TRAINING; 366 } else { 367 props->state = IB_PORT_ACTIVE; 368 props->phys_state = IB_PORT_PHYS_STATE_LINK_UP; 369 } 370 371 props->port_cap_flags = 0; 372 props->gid_tbl_len = 1; 373 props->bad_pkey_cntr = 0; 374 props->qkey_viol_cntr = 0; 375 props->max_mtu = IB_MTU_4096; 376 props->active_mtu = iboe_get_mtu(us_ibdev->ufdev->mtu); 377 /* Userspace will adjust for hdrs */ 378 props->max_msg_sz = us_ibdev->ufdev->mtu; 379 props->max_vl_num = 1; 380 mutex_unlock(&us_ibdev->usdev_lock); 381 382 return 0; 383} 384 385int usnic_ib_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr, 386 int qp_attr_mask, 387 struct ib_qp_init_attr *qp_init_attr) 388{ 389 struct usnic_ib_qp_grp *qp_grp; 390 struct usnic_ib_vf *vf; 391 int err; 392 393 usnic_dbg("\n"); 394 395 memset(qp_attr, 0, sizeof(*qp_attr)); 396 memset(qp_init_attr, 0, sizeof(*qp_init_attr)); 397 398 qp_grp = to_uqp_grp(qp); 399 vf = qp_grp->vf; 400 mutex_lock(&vf->pf->usdev_lock); 401 usnic_dbg("\n"); 402 qp_attr->qp_state = qp_grp->state; 403 qp_attr->cur_qp_state = qp_grp->state; 404 405 switch (qp_grp->ibqp.qp_type) { 406 case IB_QPT_UD: 407 qp_attr->qkey = 0; 408 break; 409 default: 410 usnic_err("Unexpected qp_type %d\n", qp_grp->ibqp.qp_type); 411 err = -EINVAL; 412 goto err_out; 413 } 414 415 mutex_unlock(&vf->pf->usdev_lock); 416 return 0; 417 418err_out: 419 mutex_unlock(&vf->pf->usdev_lock); 420 return err; 421} 422 423int usnic_ib_query_gid(struct ib_device *ibdev, u32 port, int index, 424 union ib_gid *gid) 425{ 426 427 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev); 428 usnic_dbg("\n"); 429 430 if (index > 1) 431 return -EINVAL; 432 433 mutex_lock(&us_ibdev->usdev_lock); 434 memset(&(gid->raw[0]), 0, sizeof(gid->raw)); 435 usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr, 436 &gid->raw[0]); 437 mutex_unlock(&us_ibdev->usdev_lock); 438 439 return 0; 440} 441 442int usnic_ib_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) 443{ 444 struct usnic_ib_pd *pd = to_upd(ibpd); 445 446 pd->umem_pd = usnic_uiom_alloc_pd(ibpd->device->dev.parent); 447 if (IS_ERR(pd->umem_pd)) 448 return PTR_ERR(pd->umem_pd); 449 450 return 0; 451} 452 453int usnic_ib_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata) 454{ 455 usnic_uiom_dealloc_pd((to_upd(pd))->umem_pd); 456 return 0; 457} 458 459int usnic_ib_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *init_attr, 460 struct ib_udata *udata) 461{ 462 int err; 463 struct usnic_ib_dev *us_ibdev; 464 struct usnic_ib_qp_grp *qp_grp = to_uqp_grp(ibqp); 465 struct usnic_ib_ucontext *ucontext = rdma_udata_to_drv_context( 466 udata, struct usnic_ib_ucontext, ibucontext); 467 int cq_cnt; 468 struct usnic_vnic_res_spec res_spec; 469 struct usnic_ib_create_qp_cmd cmd; 470 struct usnic_transport_spec trans_spec; 471 472 usnic_dbg("\n"); 473 474 us_ibdev = to_usdev(ibqp->device); 475 476 if (init_attr->create_flags) 477 return -EOPNOTSUPP; 478 479 err = ib_copy_from_udata(&cmd, udata, sizeof(cmd)); 480 if (err) { 481 usnic_err("%s: cannot copy udata for create_qp\n", 482 dev_name(&us_ibdev->ib_dev.dev)); 483 return -EINVAL; 484 } 485 486 err = create_qp_validate_user_data(cmd); 487 if (err) { 488 usnic_err("%s: Failed to validate user data\n", 489 dev_name(&us_ibdev->ib_dev.dev)); 490 return -EINVAL; 491 } 492 493 if (init_attr->qp_type != IB_QPT_UD) { 494 usnic_err("%s asked to make a non-UD QP: %d\n", 495 dev_name(&us_ibdev->ib_dev.dev), init_attr->qp_type); 496 return -EOPNOTSUPP; 497 } 498 499 trans_spec = cmd.spec; 500 mutex_lock(&us_ibdev->usdev_lock); 501 cq_cnt = (init_attr->send_cq == init_attr->recv_cq) ? 1 : 2; 502 res_spec = min_transport_spec[trans_spec.trans_type]; 503 usnic_vnic_res_spec_update(&res_spec, USNIC_VNIC_RES_TYPE_CQ, cq_cnt); 504 err = find_free_vf_and_create_qp_grp(ibqp, &trans_spec, &res_spec); 505 if (err) 506 goto out_release_mutex; 507 508 err = usnic_ib_fill_create_qp_resp(qp_grp, udata); 509 if (err) { 510 err = -EBUSY; 511 goto out_release_qp_grp; 512 } 513 514 qp_grp->ctx = ucontext; 515 list_add_tail(&qp_grp->link, &ucontext->qp_grp_list); 516 usnic_ib_log_vf(qp_grp->vf); 517 mutex_unlock(&us_ibdev->usdev_lock); 518 return 0; 519 520out_release_qp_grp: 521 qp_grp_destroy(qp_grp); 522out_release_mutex: 523 mutex_unlock(&us_ibdev->usdev_lock); 524 return err; 525} 526 527int usnic_ib_destroy_qp(struct ib_qp *qp, struct ib_udata *udata) 528{ 529 struct usnic_ib_qp_grp *qp_grp; 530 struct usnic_ib_vf *vf; 531 532 usnic_dbg("\n"); 533 534 qp_grp = to_uqp_grp(qp); 535 vf = qp_grp->vf; 536 mutex_lock(&vf->pf->usdev_lock); 537 if (usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RESET, NULL)) { 538 usnic_err("Failed to move qp grp %u to reset\n", 539 qp_grp->grp_id); 540 } 541 542 list_del(&qp_grp->link); 543 qp_grp_destroy(qp_grp); 544 mutex_unlock(&vf->pf->usdev_lock); 545 546 return 0; 547} 548 549int usnic_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 550 int attr_mask, struct ib_udata *udata) 551{ 552 struct usnic_ib_qp_grp *qp_grp; 553 int status; 554 usnic_dbg("\n"); 555 556 if (attr_mask & ~IB_QP_ATTR_STANDARD_BITS) 557 return -EOPNOTSUPP; 558 559 qp_grp = to_uqp_grp(ibqp); 560 561 mutex_lock(&qp_grp->vf->pf->usdev_lock); 562 if ((attr_mask & IB_QP_PORT) && attr->port_num != 1) { 563 /* usnic devices only have one port */ 564 status = -EINVAL; 565 goto out_unlock; 566 } 567 if (attr_mask & IB_QP_STATE) { 568 status = usnic_ib_qp_grp_modify(qp_grp, attr->qp_state, NULL); 569 } else { 570 usnic_err("Unhandled request, attr_mask=0x%x\n", attr_mask); 571 status = -EINVAL; 572 } 573 574out_unlock: 575 mutex_unlock(&qp_grp->vf->pf->usdev_lock); 576 return status; 577} 578 579int usnic_ib_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr, 580 struct ib_udata *udata) 581{ 582 if (attr->flags) 583 return -EOPNOTSUPP; 584 585 return 0; 586} 587 588int usnic_ib_destroy_cq(struct ib_cq *cq, struct ib_udata *udata) 589{ 590 return 0; 591} 592 593struct ib_mr *usnic_ib_reg_mr(struct ib_pd *pd, u64 start, u64 length, 594 u64 virt_addr, int access_flags, 595 struct ib_udata *udata) 596{ 597 struct usnic_ib_mr *mr; 598 int err; 599 600 usnic_dbg("start 0x%llx va 0x%llx length 0x%llx\n", start, 601 virt_addr, length); 602 603 mr = kzalloc(sizeof(*mr), GFP_KERNEL); 604 if (!mr) 605 return ERR_PTR(-ENOMEM); 606 607 mr->umem = usnic_uiom_reg_get(to_upd(pd)->umem_pd, start, length, 608 access_flags, 0); 609 if (IS_ERR_OR_NULL(mr->umem)) { 610 err = mr->umem ? PTR_ERR(mr->umem) : -EFAULT; 611 goto err_free; 612 } 613 614 mr->ibmr.lkey = mr->ibmr.rkey = 0; 615 return &mr->ibmr; 616 617err_free: 618 kfree(mr); 619 return ERR_PTR(err); 620} 621 622int usnic_ib_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata) 623{ 624 struct usnic_ib_mr *mr = to_umr(ibmr); 625 626 usnic_dbg("va 0x%lx length 0x%zx\n", mr->umem->va, mr->umem->length); 627 628 usnic_uiom_reg_release(mr->umem); 629 kfree(mr); 630 return 0; 631} 632 633int usnic_ib_alloc_ucontext(struct ib_ucontext *uctx, struct ib_udata *udata) 634{ 635 struct ib_device *ibdev = uctx->device; 636 struct usnic_ib_ucontext *context = to_ucontext(uctx); 637 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev); 638 usnic_dbg("\n"); 639 640 INIT_LIST_HEAD(&context->qp_grp_list); 641 mutex_lock(&us_ibdev->usdev_lock); 642 list_add_tail(&context->link, &us_ibdev->ctx_list); 643 mutex_unlock(&us_ibdev->usdev_lock); 644 645 return 0; 646} 647 648void usnic_ib_dealloc_ucontext(struct ib_ucontext *ibcontext) 649{ 650 struct usnic_ib_ucontext *context = to_uucontext(ibcontext); 651 struct usnic_ib_dev *us_ibdev = to_usdev(ibcontext->device); 652 usnic_dbg("\n"); 653 654 mutex_lock(&us_ibdev->usdev_lock); 655 WARN_ON_ONCE(!list_empty(&context->qp_grp_list)); 656 list_del(&context->link); 657 mutex_unlock(&us_ibdev->usdev_lock); 658} 659 660int usnic_ib_mmap(struct ib_ucontext *context, 661 struct vm_area_struct *vma) 662{ 663 struct usnic_ib_ucontext *uctx = to_ucontext(context); 664 struct usnic_ib_dev *us_ibdev; 665 struct usnic_ib_qp_grp *qp_grp; 666 struct usnic_ib_vf *vf; 667 struct vnic_dev_bar *bar; 668 dma_addr_t bus_addr; 669 unsigned int len; 670 unsigned int vfid; 671 672 usnic_dbg("\n"); 673 674 us_ibdev = to_usdev(context->device); 675 vm_flags_set(vma, VM_IO); 676 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 677 vfid = vma->vm_pgoff; 678 usnic_dbg("Page Offset %lu PAGE_SHIFT %u VFID %u\n", 679 vma->vm_pgoff, PAGE_SHIFT, vfid); 680 681 mutex_lock(&us_ibdev->usdev_lock); 682 list_for_each_entry(qp_grp, &uctx->qp_grp_list, link) { 683 vf = qp_grp->vf; 684 if (usnic_vnic_get_index(vf->vnic) == vfid) { 685 bar = usnic_vnic_get_bar(vf->vnic, 0); 686 if ((vma->vm_end - vma->vm_start) != bar->len) { 687 usnic_err("Bar0 Len %lu - Request map %lu\n", 688 bar->len, 689 vma->vm_end - vma->vm_start); 690 mutex_unlock(&us_ibdev->usdev_lock); 691 return -EINVAL; 692 } 693 bus_addr = bar->bus_addr; 694 len = bar->len; 695 usnic_dbg("bus: %pa vaddr: %p size: %ld\n", 696 &bus_addr, bar->vaddr, bar->len); 697 mutex_unlock(&us_ibdev->usdev_lock); 698 699 return remap_pfn_range(vma, 700 vma->vm_start, 701 bus_addr >> PAGE_SHIFT, 702 len, vma->vm_page_prot); 703 } 704 } 705 706 mutex_unlock(&us_ibdev->usdev_lock); 707 usnic_err("No VF %u found\n", vfid); 708 return -EINVAL; 709} 710