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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 two5 * licenses. You may choose to be licensed under the terms of the GNU6 * General Public License (GPL) Version 2, available from the file7 * COPYING in the main directory of this source tree, or the8 * BSD license below:9 *10 * Redistribution and use in source and binary forms, with or11 * without modification, are permitted provided that the following12 * conditions are met:13 *14 * - Redistributions of source code must retain the above15 * copyright notice, this list of conditions and the following16 * disclaimer.17 *18 * - Redistributions in binary form must reproduce the above19 * copyright notice, this list of conditions and the following20 * disclaimer in the documentation and/or other materials21 * 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 OF25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE30 * 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_CUSTOM52 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 int171find_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 Userspace329 * 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 call348 * because acquiring rtnl_lock in ib_get_eth_speed, while holding349 * 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 uverbs_attr_bundle *attrs)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