Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Upinder Malhi | 3169 | 90.83% | 4 | 9.30% |
Leon Romanovsky | 114 | 3.27% | 8 | 18.60% |
Jason Gunthorpe | 49 | 1.40% | 5 | 11.63% |
Matan Barak | 32 | 0.92% | 2 | 4.65% |
Nelson Escobar | 18 | 0.52% | 2 | 4.65% |
Dan Carpenter | 17 | 0.49% | 2 | 4.65% |
Yuval Shaia | 15 | 0.43% | 1 | 2.33% |
shamir rabinovitch | 10 | 0.29% | 1 | 2.33% |
Or Gerlitz | 10 | 0.29% | 2 | 4.65% |
Robin Murphy | 9 | 0.26% | 1 | 2.33% |
Dinghao Liu | 8 | 0.23% | 1 | 2.33% |
Yishai Hadas | 6 | 0.17% | 1 | 2.33% |
Parvi Kaustubhi | 6 | 0.17% | 1 | 2.33% |
Julia Lawall | 4 | 0.11% | 2 | 4.65% |
Suren Baghdasaryan | 4 | 0.11% | 1 | 2.33% |
Kamal Heib | 4 | 0.11% | 2 | 4.65% |
Ariel Levkovich | 3 | 0.09% | 1 | 2.33% |
Mark Bloch | 3 | 0.09% | 1 | 2.33% |
Akiva Goldberger | 2 | 0.06% | 1 | 2.33% |
Bart Van Assche | 2 | 0.06% | 1 | 2.33% |
Peter Zijlstra | 2 | 0.06% | 1 | 2.33% |
Jeff Squyres | 1 | 0.03% | 1 | 2.33% |
Chuhong Yuan | 1 | 0.03% | 1 | 2.33% |
Total | 3489 | 43 |
/* * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. * */ #include <linux/init.h> #include <linux/slab.h> #include <linux/errno.h> #include <rdma/ib_user_verbs.h> #include <rdma/ib_addr.h> #include <rdma/uverbs_ioctl.h> #include "usnic_abi.h" #include "usnic_ib.h" #include "usnic_common_util.h" #include "usnic_ib_qp_grp.h" #include "usnic_ib_verbs.h" #include "usnic_fwd.h" #include "usnic_log.h" #include "usnic_uiom.h" #include "usnic_transport.h" #define USNIC_DEFAULT_TRANSPORT USNIC_TRANSPORT_ROCE_CUSTOM const struct usnic_vnic_res_spec min_transport_spec[USNIC_TRANSPORT_MAX] = { { /*USNIC_TRANSPORT_UNKNOWN*/ .resources = { {.type = USNIC_VNIC_RES_TYPE_EOL, .cnt = 0,}, }, }, { /*USNIC_TRANSPORT_ROCE_CUSTOM*/ .resources = { {.type = USNIC_VNIC_RES_TYPE_WQ, .cnt = 1,}, {.type = USNIC_VNIC_RES_TYPE_RQ, .cnt = 1,}, {.type = USNIC_VNIC_RES_TYPE_CQ, .cnt = 1,}, {.type = USNIC_VNIC_RES_TYPE_EOL, .cnt = 0,}, }, }, { /*USNIC_TRANSPORT_IPV4_UDP*/ .resources = { {.type = USNIC_VNIC_RES_TYPE_WQ, .cnt = 1,}, {.type = USNIC_VNIC_RES_TYPE_RQ, .cnt = 1,}, {.type = USNIC_VNIC_RES_TYPE_CQ, .cnt = 1,}, {.type = USNIC_VNIC_RES_TYPE_EOL, .cnt = 0,}, }, }, }; static void usnic_ib_fw_string_to_u64(char *fw_ver_str, u64 *fw_ver) { *fw_ver = *((u64 *)fw_ver_str); } static int usnic_ib_fill_create_qp_resp(struct usnic_ib_qp_grp *qp_grp, struct ib_udata *udata) { struct usnic_ib_dev *us_ibdev; struct usnic_ib_create_qp_resp resp; struct pci_dev *pdev; struct vnic_dev_bar *bar; struct usnic_vnic_res_chunk *chunk; struct usnic_ib_qp_grp_flow *default_flow; int i, err; memset(&resp, 0, sizeof(resp)); us_ibdev = qp_grp->vf->pf; pdev = usnic_vnic_get_pdev(qp_grp->vf->vnic); if (!pdev) { usnic_err("Failed to get pdev of qp_grp %d\n", qp_grp->grp_id); return -EFAULT; } bar = usnic_vnic_get_bar(qp_grp->vf->vnic, 0); if (!bar) { usnic_err("Failed to get bar0 of qp_grp %d vf %s", qp_grp->grp_id, pci_name(pdev)); return -EFAULT; } resp.vfid = usnic_vnic_get_index(qp_grp->vf->vnic); resp.bar_bus_addr = bar->bus_addr; resp.bar_len = bar->len; chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_RQ); if (IS_ERR(chunk)) { usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n", usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_RQ), qp_grp->grp_id, PTR_ERR(chunk)); return PTR_ERR(chunk); } WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_RQ); resp.rq_cnt = chunk->cnt; for (i = 0; i < chunk->cnt; i++) resp.rq_idx[i] = chunk->res[i]->vnic_idx; chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_WQ); if (IS_ERR(chunk)) { usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n", usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_WQ), qp_grp->grp_id, PTR_ERR(chunk)); return PTR_ERR(chunk); } WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_WQ); resp.wq_cnt = chunk->cnt; for (i = 0; i < chunk->cnt; i++) resp.wq_idx[i] = chunk->res[i]->vnic_idx; chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_CQ); if (IS_ERR(chunk)) { usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n", usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_CQ), qp_grp->grp_id, PTR_ERR(chunk)); return PTR_ERR(chunk); } WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_CQ); resp.cq_cnt = chunk->cnt; for (i = 0; i < chunk->cnt; i++) resp.cq_idx[i] = chunk->res[i]->vnic_idx; default_flow = list_first_entry(&qp_grp->flows_lst, struct usnic_ib_qp_grp_flow, link); resp.transport = default_flow->trans_type; err = ib_copy_to_udata(udata, &resp, sizeof(resp)); if (err) { usnic_err("Failed to copy udata for %s", dev_name(&us_ibdev->ib_dev.dev)); return err; } return 0; } static int find_free_vf_and_create_qp_grp(struct ib_qp *qp, struct usnic_transport_spec *trans_spec, struct usnic_vnic_res_spec *res_spec) { struct usnic_ib_dev *us_ibdev = to_usdev(qp->device); struct usnic_ib_pd *pd = to_upd(qp->pd); struct usnic_ib_vf *vf; struct usnic_vnic *vnic; struct usnic_ib_qp_grp *qp_grp = to_uqp_grp(qp); struct device *dev, **dev_list; int i, ret; BUG_ON(!mutex_is_locked(&us_ibdev->usdev_lock)); if (list_empty(&us_ibdev->vf_dev_list)) { usnic_info("No vfs to allocate\n"); return -ENOMEM; } if (usnic_ib_share_vf) { /* Try to find resouces on a used vf which is in pd */ dev_list = usnic_uiom_get_dev_list(pd->umem_pd); if (IS_ERR(dev_list)) return PTR_ERR(dev_list); for (i = 0; dev_list[i]; i++) { dev = dev_list[i]; vf = dev_get_drvdata(dev); mutex_lock(&vf->lock); vnic = vf->vnic; if (!usnic_vnic_check_room(vnic, res_spec)) { usnic_dbg("Found used vnic %s from %s\n", dev_name(&us_ibdev->ib_dev.dev), pci_name(usnic_vnic_get_pdev( vnic))); ret = usnic_ib_qp_grp_create(qp_grp, us_ibdev->ufdev, vf, pd, res_spec, trans_spec); mutex_unlock(&vf->lock); goto qp_grp_check; } mutex_unlock(&vf->lock); } usnic_uiom_free_dev_list(dev_list); dev_list = NULL; } /* Try to find resources on an unused vf */ list_for_each_entry(vf, &us_ibdev->vf_dev_list, link) { mutex_lock(&vf->lock); vnic = vf->vnic; if (vf->qp_grp_ref_cnt == 0 && usnic_vnic_check_room(vnic, res_spec) == 0) { ret = usnic_ib_qp_grp_create(qp_grp, us_ibdev->ufdev, vf, pd, res_spec, trans_spec); mutex_unlock(&vf->lock); goto qp_grp_check; } mutex_unlock(&vf->lock); } usnic_info("No free qp grp found on %s\n", dev_name(&us_ibdev->ib_dev.dev)); return -ENOMEM; qp_grp_check: if (ret) { usnic_err("Failed to allocate qp_grp\n"); if (usnic_ib_share_vf) usnic_uiom_free_dev_list(dev_list); } return ret; } static void qp_grp_destroy(struct usnic_ib_qp_grp *qp_grp) { struct usnic_ib_vf *vf = qp_grp->vf; WARN_ON(qp_grp->state != IB_QPS_RESET); mutex_lock(&vf->lock); usnic_ib_qp_grp_destroy(qp_grp); mutex_unlock(&vf->lock); } static int create_qp_validate_user_data(struct usnic_ib_create_qp_cmd cmd) { if (cmd.spec.trans_type <= USNIC_TRANSPORT_UNKNOWN || cmd.spec.trans_type >= USNIC_TRANSPORT_MAX) return -EINVAL; return 0; } /* Start of ib callback functions */ enum rdma_link_layer usnic_ib_port_link_layer(struct ib_device *device, u32 port_num) { return IB_LINK_LAYER_ETHERNET; } int usnic_ib_query_device(struct ib_device *ibdev, struct ib_device_attr *props, struct ib_udata *uhw) { struct usnic_ib_dev *us_ibdev = to_usdev(ibdev); union ib_gid gid; struct ethtool_drvinfo info; int qp_per_vf; usnic_dbg("\n"); if (uhw->inlen || uhw->outlen) return -EINVAL; mutex_lock(&us_ibdev->usdev_lock); us_ibdev->netdev->ethtool_ops->get_drvinfo(us_ibdev->netdev, &info); memset(props, 0, sizeof(*props)); usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr, &gid.raw[0]); memcpy(&props->sys_image_guid, &gid.global.interface_id, sizeof(gid.global.interface_id)); usnic_ib_fw_string_to_u64(&info.fw_version[0], &props->fw_ver); props->max_mr_size = USNIC_UIOM_MAX_MR_SIZE; props->page_size_cap = USNIC_UIOM_PAGE_SIZE; props->vendor_id = PCI_VENDOR_ID_CISCO; props->vendor_part_id = PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC; props->hw_ver = us_ibdev->pdev->subsystem_device; qp_per_vf = max(us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_WQ], us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_RQ]); props->max_qp = qp_per_vf * kref_read(&us_ibdev->vf_cnt); props->device_cap_flags = IB_DEVICE_PORT_ACTIVE_EVENT | IB_DEVICE_SYS_IMAGE_GUID; props->kernel_cap_flags = IBK_BLOCK_MULTICAST_LOOPBACK; props->max_cq = us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_CQ] * kref_read(&us_ibdev->vf_cnt); props->max_pd = USNIC_UIOM_MAX_PD_CNT; props->max_mr = USNIC_UIOM_MAX_MR_CNT; props->local_ca_ack_delay = 0; props->max_pkeys = 0; props->atomic_cap = IB_ATOMIC_NONE; props->masked_atomic_cap = props->atomic_cap; props->max_qp_rd_atom = 0; props->max_qp_init_rd_atom = 0; props->max_res_rd_atom = 0; props->max_srq = 0; props->max_srq_wr = 0; props->max_srq_sge = 0; props->max_fast_reg_page_list_len = 0; props->max_mcast_grp = 0; props->max_mcast_qp_attach = 0; props->max_total_mcast_qp_attach = 0; /* Owned by Userspace * max_qp_wr, max_sge, max_sge_rd, max_cqe */ mutex_unlock(&us_ibdev->usdev_lock); return 0; } int usnic_ib_query_port(struct ib_device *ibdev, u32 port, struct ib_port_attr *props) { struct usnic_ib_dev *us_ibdev = to_usdev(ibdev); usnic_dbg("\n"); if (ib_get_eth_speed(ibdev, port, &props->active_speed, &props->active_width)) return -EINVAL; /* * usdev_lock is acquired after (and not before) ib_get_eth_speed call * because acquiring rtnl_lock in ib_get_eth_speed, while holding * usdev_lock could lead to a deadlock. */ mutex_lock(&us_ibdev->usdev_lock); /* props being zeroed by the caller, avoid zeroing it here */ props->lid = 0; props->lmc = 1; props->sm_lid = 0; props->sm_sl = 0; if (!us_ibdev->ufdev->link_up) { props->state = IB_PORT_DOWN; props->phys_state = IB_PORT_PHYS_STATE_DISABLED; } else if (!us_ibdev->ufdev->inaddr) { props->state = IB_PORT_INIT; props->phys_state = IB_PORT_PHYS_STATE_PORT_CONFIGURATION_TRAINING; } else { props->state = IB_PORT_ACTIVE; props->phys_state = IB_PORT_PHYS_STATE_LINK_UP; } props->port_cap_flags = 0; props->gid_tbl_len = 1; props->bad_pkey_cntr = 0; props->qkey_viol_cntr = 0; props->max_mtu = IB_MTU_4096; props->active_mtu = iboe_get_mtu(us_ibdev->ufdev->mtu); /* Userspace will adjust for hdrs */ props->max_msg_sz = us_ibdev->ufdev->mtu; props->max_vl_num = 1; mutex_unlock(&us_ibdev->usdev_lock); return 0; } int usnic_ib_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr, int qp_attr_mask, struct ib_qp_init_attr *qp_init_attr) { struct usnic_ib_qp_grp *qp_grp; struct usnic_ib_vf *vf; int err; usnic_dbg("\n"); memset(qp_attr, 0, sizeof(*qp_attr)); memset(qp_init_attr, 0, sizeof(*qp_init_attr)); qp_grp = to_uqp_grp(qp); vf = qp_grp->vf; mutex_lock(&vf->pf->usdev_lock); usnic_dbg("\n"); qp_attr->qp_state = qp_grp->state; qp_attr->cur_qp_state = qp_grp->state; switch (qp_grp->ibqp.qp_type) { case IB_QPT_UD: qp_attr->qkey = 0; break; default: usnic_err("Unexpected qp_type %d\n", qp_grp->ibqp.qp_type); err = -EINVAL; goto err_out; } mutex_unlock(&vf->pf->usdev_lock); return 0; err_out: mutex_unlock(&vf->pf->usdev_lock); return err; } int usnic_ib_query_gid(struct ib_device *ibdev, u32 port, int index, union ib_gid *gid) { struct usnic_ib_dev *us_ibdev = to_usdev(ibdev); usnic_dbg("\n"); if (index > 1) return -EINVAL; mutex_lock(&us_ibdev->usdev_lock); memset(&(gid->raw[0]), 0, sizeof(gid->raw)); usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr, &gid->raw[0]); mutex_unlock(&us_ibdev->usdev_lock); return 0; } int usnic_ib_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) { struct usnic_ib_pd *pd = to_upd(ibpd); pd->umem_pd = usnic_uiom_alloc_pd(ibpd->device->dev.parent); if (IS_ERR(pd->umem_pd)) return PTR_ERR(pd->umem_pd); return 0; } int usnic_ib_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata) { usnic_uiom_dealloc_pd((to_upd(pd))->umem_pd); return 0; } int usnic_ib_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *init_attr, struct ib_udata *udata) { int err; struct usnic_ib_dev *us_ibdev; struct usnic_ib_qp_grp *qp_grp = to_uqp_grp(ibqp); struct usnic_ib_ucontext *ucontext = rdma_udata_to_drv_context( udata, struct usnic_ib_ucontext, ibucontext); int cq_cnt; struct usnic_vnic_res_spec res_spec; struct usnic_ib_create_qp_cmd cmd; struct usnic_transport_spec trans_spec; usnic_dbg("\n"); us_ibdev = to_usdev(ibqp->device); if (init_attr->create_flags) return -EOPNOTSUPP; err = ib_copy_from_udata(&cmd, udata, sizeof(cmd)); if (err) { usnic_err("%s: cannot copy udata for create_qp\n", dev_name(&us_ibdev->ib_dev.dev)); return -EINVAL; } err = create_qp_validate_user_data(cmd); if (err) { usnic_err("%s: Failed to validate user data\n", dev_name(&us_ibdev->ib_dev.dev)); return -EINVAL; } if (init_attr->qp_type != IB_QPT_UD) { usnic_err("%s asked to make a non-UD QP: %d\n", dev_name(&us_ibdev->ib_dev.dev), init_attr->qp_type); return -EOPNOTSUPP; } trans_spec = cmd.spec; mutex_lock(&us_ibdev->usdev_lock); cq_cnt = (init_attr->send_cq == init_attr->recv_cq) ? 1 : 2; res_spec = min_transport_spec[trans_spec.trans_type]; usnic_vnic_res_spec_update(&res_spec, USNIC_VNIC_RES_TYPE_CQ, cq_cnt); err = find_free_vf_and_create_qp_grp(ibqp, &trans_spec, &res_spec); if (err) goto out_release_mutex; err = usnic_ib_fill_create_qp_resp(qp_grp, udata); if (err) { err = -EBUSY; goto out_release_qp_grp; } qp_grp->ctx = ucontext; list_add_tail(&qp_grp->link, &ucontext->qp_grp_list); usnic_ib_log_vf(qp_grp->vf); mutex_unlock(&us_ibdev->usdev_lock); return 0; out_release_qp_grp: qp_grp_destroy(qp_grp); out_release_mutex: mutex_unlock(&us_ibdev->usdev_lock); return err; } int usnic_ib_destroy_qp(struct ib_qp *qp, struct ib_udata *udata) { struct usnic_ib_qp_grp *qp_grp; struct usnic_ib_vf *vf; usnic_dbg("\n"); qp_grp = to_uqp_grp(qp); vf = qp_grp->vf; mutex_lock(&vf->pf->usdev_lock); if (usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RESET, NULL)) { usnic_err("Failed to move qp grp %u to reset\n", qp_grp->grp_id); } list_del(&qp_grp->link); qp_grp_destroy(qp_grp); mutex_unlock(&vf->pf->usdev_lock); return 0; } int usnic_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask, struct ib_udata *udata) { struct usnic_ib_qp_grp *qp_grp; int status; usnic_dbg("\n"); if (attr_mask & ~IB_QP_ATTR_STANDARD_BITS) return -EOPNOTSUPP; qp_grp = to_uqp_grp(ibqp); mutex_lock(&qp_grp->vf->pf->usdev_lock); if ((attr_mask & IB_QP_PORT) && attr->port_num != 1) { /* usnic devices only have one port */ status = -EINVAL; goto out_unlock; } if (attr_mask & IB_QP_STATE) { status = usnic_ib_qp_grp_modify(qp_grp, attr->qp_state, NULL); } else { usnic_err("Unhandled request, attr_mask=0x%x\n", attr_mask); status = -EINVAL; } out_unlock: mutex_unlock(&qp_grp->vf->pf->usdev_lock); return status; } int usnic_ib_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr, struct uverbs_attr_bundle *attrs) { if (attr->flags) return -EOPNOTSUPP; return 0; } int usnic_ib_destroy_cq(struct ib_cq *cq, struct ib_udata *udata) { return 0; } struct ib_mr *usnic_ib_reg_mr(struct ib_pd *pd, u64 start, u64 length, u64 virt_addr, int access_flags, struct ib_udata *udata) { struct usnic_ib_mr *mr; int err; usnic_dbg("start 0x%llx va 0x%llx length 0x%llx\n", start, virt_addr, length); mr = kzalloc(sizeof(*mr), GFP_KERNEL); if (!mr) return ERR_PTR(-ENOMEM); mr->umem = usnic_uiom_reg_get(to_upd(pd)->umem_pd, start, length, access_flags, 0); if (IS_ERR_OR_NULL(mr->umem)) { err = mr->umem ? PTR_ERR(mr->umem) : -EFAULT; goto err_free; } mr->ibmr.lkey = mr->ibmr.rkey = 0; return &mr->ibmr; err_free: kfree(mr); return ERR_PTR(err); } int usnic_ib_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata) { struct usnic_ib_mr *mr = to_umr(ibmr); usnic_dbg("va 0x%lx length 0x%zx\n", mr->umem->va, mr->umem->length); usnic_uiom_reg_release(mr->umem); kfree(mr); return 0; } int usnic_ib_alloc_ucontext(struct ib_ucontext *uctx, struct ib_udata *udata) { struct ib_device *ibdev = uctx->device; struct usnic_ib_ucontext *context = to_ucontext(uctx); struct usnic_ib_dev *us_ibdev = to_usdev(ibdev); usnic_dbg("\n"); INIT_LIST_HEAD(&context->qp_grp_list); mutex_lock(&us_ibdev->usdev_lock); list_add_tail(&context->link, &us_ibdev->ctx_list); mutex_unlock(&us_ibdev->usdev_lock); return 0; } void usnic_ib_dealloc_ucontext(struct ib_ucontext *ibcontext) { struct usnic_ib_ucontext *context = to_uucontext(ibcontext); struct usnic_ib_dev *us_ibdev = to_usdev(ibcontext->device); usnic_dbg("\n"); mutex_lock(&us_ibdev->usdev_lock); WARN_ON_ONCE(!list_empty(&context->qp_grp_list)); list_del(&context->link); mutex_unlock(&us_ibdev->usdev_lock); } int usnic_ib_mmap(struct ib_ucontext *context, struct vm_area_struct *vma) { struct usnic_ib_ucontext *uctx = to_ucontext(context); struct usnic_ib_dev *us_ibdev; struct usnic_ib_qp_grp *qp_grp; struct usnic_ib_vf *vf; struct vnic_dev_bar *bar; dma_addr_t bus_addr; unsigned int len; unsigned int vfid; usnic_dbg("\n"); us_ibdev = to_usdev(context->device); vm_flags_set(vma, VM_IO); vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); vfid = vma->vm_pgoff; usnic_dbg("Page Offset %lu PAGE_SHIFT %u VFID %u\n", vma->vm_pgoff, PAGE_SHIFT, vfid); mutex_lock(&us_ibdev->usdev_lock); list_for_each_entry(qp_grp, &uctx->qp_grp_list, link) { vf = qp_grp->vf; if (usnic_vnic_get_index(vf->vnic) == vfid) { bar = usnic_vnic_get_bar(vf->vnic, 0); if ((vma->vm_end - vma->vm_start) != bar->len) { usnic_err("Bar0 Len %lu - Request map %lu\n", bar->len, vma->vm_end - vma->vm_start); mutex_unlock(&us_ibdev->usdev_lock); return -EINVAL; } bus_addr = bar->bus_addr; len = bar->len; usnic_dbg("bus: %pa vaddr: %p size: %ld\n", &bus_addr, bar->vaddr, bar->len); mutex_unlock(&us_ibdev->usdev_lock); return remap_pfn_range(vma, vma->vm_start, bus_addr >> PAGE_SHIFT, len, vma->vm_page_prot); } } mutex_unlock(&us_ibdev->usdev_lock); usnic_err("No VF %u found\n", vfid); return -EINVAL; }
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