IB/usnic: Add Cisco VIC low-level hardware driver
This adds a driver that allows userspace to use UD-like QPs over a
proprietary Cisco transport with Cisco's Virtual Interface Cards (VICs),
including VIC 1240 and 1280 cards.
Signed-off-by: Upinder Malhi <umalhi@cisco.com>
Signed-off-by: Christian Benvenuti <benve@cisco.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
diff --git a/drivers/infiniband/hw/usnic/usnic_ib_verbs.c b/drivers/infiniband/hw/usnic/usnic_ib_verbs.c
new file mode 100644
index 0000000..8f8dfa2
--- /dev/null
+++ b/drivers/infiniband/hw/usnic/usnic_ib_verbs.c
@@ -0,0 +1,736 @@
+/*
+ * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * 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/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+
+#include <rdma/ib_user_verbs.h>
+#include <rdma/ib_addr.h>
+
+#include "usnic_abi.h"
+#include "usnic_ib.h"
+#include "usnic_common_util.h"
+#include "usnic_ib_qp_grp.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
+
+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;
+ 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;
+ resp.transport = qp_grp->transport;
+
+ chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_RQ);
+ if (IS_ERR_OR_NULL(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 chunk ? PTR_ERR(chunk) : -ENOMEM;
+ }
+
+ 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_OR_NULL(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 chunk ? PTR_ERR(chunk) : -ENOMEM;
+ }
+
+ 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_OR_NULL(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 chunk ? PTR_ERR(chunk) : -ENOMEM;
+ }
+
+ 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;
+
+ err = ib_copy_to_udata(udata, &resp, sizeof(resp));
+ if (err) {
+ usnic_err("Failed to copy udata for %s", us_ibdev->ib_dev.name);
+ return err;
+ }
+
+ return 0;
+}
+
+static struct usnic_ib_qp_grp*
+find_free_vf_and_create_qp_grp(struct usnic_ib_dev *us_ibdev,
+ struct usnic_ib_pd *pd,
+ enum usnic_transport_type transport,
+ struct usnic_vnic_res_spec *res_spec)
+{
+ struct usnic_ib_vf *vf;
+ struct usnic_vnic *vnic;
+ struct usnic_ib_qp_grp *qp_grp;
+ struct device *dev, **dev_list;
+ int i, found = 0;
+
+ 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 NULL;
+ }
+
+ if (!us_ibdev->link_up) {
+ usnic_info("Cannot allocate qp b/c PF link is down\n");
+ return NULL;
+ }
+
+ 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);
+ for (i = 0; dev_list[i]; i++) {
+ dev = dev_list[i];
+ vf = pci_get_drvdata(to_pci_dev(dev));
+ spin_lock(&vf->lock);
+ vnic = vf->vnic;
+ if (!usnic_vnic_check_room(vnic, res_spec)) {
+ usnic_dbg("Found used vnic %s from %s\n",
+ us_ibdev->ib_dev.name,
+ pci_name(usnic_vnic_get_pdev(
+ vnic)));
+ found = 1;
+ break;
+ }
+ spin_unlock(&vf->lock);
+
+ }
+ usnic_uiom_free_dev_list(dev_list);
+ }
+
+ if (!found) {
+ /* Try to find resources on an unused vf */
+ list_for_each_entry(vf, &us_ibdev->vf_dev_list, link) {
+ spin_lock(&vf->lock);
+ vnic = vf->vnic;
+ if (vf->qp_grp_ref_cnt == 0 &&
+ usnic_vnic_check_room(vnic, res_spec) == 0) {
+ found = 1;
+ break;
+ }
+ spin_unlock(&vf->lock);
+ }
+ }
+
+ if (!found) {
+ usnic_info("No free qp grp found on %s\n",
+ us_ibdev->ib_dev.name);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ qp_grp = usnic_ib_qp_grp_create(us_ibdev->ufdev, vf, pd, res_spec,
+ transport);
+ spin_unlock(&vf->lock);
+ if (IS_ERR_OR_NULL(qp_grp)) {
+ usnic_err("Failed to allocate qp_grp\n");
+ return ERR_PTR(qp_grp ? PTR_ERR(qp_grp) : -ENOMEM);
+ }
+
+ return qp_grp;
+}
+
+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);
+
+ spin_lock(&vf->lock);
+ usnic_ib_qp_grp_destroy(qp_grp);
+ spin_unlock(&vf->lock);
+}
+
+static void eth_speed_to_ib_speed(int speed, u8 *active_speed,
+ u8 *active_width)
+{
+ if (speed <= 10000) {
+ *active_width = IB_WIDTH_1X;
+ *active_speed = IB_SPEED_FDR10;
+ } else if (speed <= 20000) {
+ *active_width = IB_WIDTH_4X;
+ *active_speed = IB_SPEED_DDR;
+ } else if (speed <= 30000) {
+ *active_width = IB_WIDTH_4X;
+ *active_speed = IB_SPEED_QDR;
+ } else if (speed <= 40000) {
+ *active_width = IB_WIDTH_4X;
+ *active_speed = IB_SPEED_FDR10;
+ } else {
+ *active_width = IB_WIDTH_4X;
+ *active_speed = IB_SPEED_EDR;
+ }
+}
+
+/* Start of ib callback functions */
+
+enum rdma_link_layer usnic_ib_port_link_layer(struct ib_device *device,
+ u8 port_num)
+{
+ return IB_LINK_LAYER_ETHERNET;
+}
+
+int usnic_ib_query_device(struct ib_device *ibdev,
+ struct ib_device_attr *props)
+{
+ struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
+ union ib_gid gid;
+ struct ethtool_drvinfo info;
+ struct ethtool_cmd cmd;
+ int qp_per_vf;
+
+ usnic_dbg("\n");
+ mutex_lock(&us_ibdev->usdev_lock);
+ us_ibdev->netdev->ethtool_ops->get_drvinfo(us_ibdev->netdev, &info);
+ us_ibdev->netdev->ethtool_ops->get_settings(us_ibdev->netdev, &cmd);
+ memset(props, 0, sizeof(*props));
+ usnic_mac_to_gid(us_ibdev->mac, &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 *
+ atomic_read(&us_ibdev->vf_cnt.refcount);
+ props->device_cap_flags = IB_DEVICE_PORT_ACTIVE_EVENT |
+ IB_DEVICE_SYS_IMAGE_GUID | IB_DEVICE_BLOCK_MULTICAST_LOOPBACK;
+ props->max_cq = us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_CQ] *
+ atomic_read(&us_ibdev->vf_cnt.refcount);
+ 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;
+ props->max_map_per_fmr = 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, u8 port,
+ struct ib_port_attr *props)
+{
+ struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
+ struct ethtool_cmd cmd;
+
+ usnic_dbg("\n");
+
+ mutex_lock(&us_ibdev->usdev_lock);
+ us_ibdev->netdev->ethtool_ops->get_settings(us_ibdev->netdev, &cmd);
+ memset(props, 0, sizeof(*props));
+
+ props->lid = 0;
+ props->lmc = 1;
+ props->sm_lid = 0;
+ props->sm_sl = 0;
+
+ if (us_ibdev->link_up) {
+ props->state = IB_PORT_ACTIVE;
+ props->phys_state = 5;
+ } else {
+ props->state = IB_PORT_DOWN;
+ props->phys_state = 3;
+ }
+
+ props->port_cap_flags = 0;
+ props->gid_tbl_len = 1;
+ props->pkey_tbl_len = 1;
+ props->bad_pkey_cntr = 0;
+ props->qkey_viol_cntr = 0;
+ eth_speed_to_ib_speed(cmd.speed, &props->active_speed,
+ &props->active_width);
+ props->max_mtu = IB_MTU_4096;
+ props->active_mtu = iboe_get_mtu(us_ibdev->mtu);
+ /* Userspace will adjust for hdrs */
+ props->max_msg_sz = us_ibdev->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, u8 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_to_gid(us_ibdev->mac, &gid->raw[0]);
+ mutex_unlock(&us_ibdev->usdev_lock);
+
+ return 0;
+}
+
+int usnic_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
+ u16 *pkey)
+{
+ if (index > 1)
+ return -EINVAL;
+
+ *pkey = 0xffff;
+ return 0;
+}
+
+struct ib_pd *usnic_ib_alloc_pd(struct ib_device *ibdev,
+ struct ib_ucontext *context,
+ struct ib_udata *udata)
+{
+ struct usnic_ib_pd *pd;
+ void *umem_pd;
+
+ usnic_dbg("\n");
+
+ pd = kzalloc(sizeof(*pd), GFP_KERNEL);
+ if (!pd)
+ return ERR_PTR(-ENOMEM);
+
+ umem_pd = pd->umem_pd = usnic_uiom_alloc_pd();
+ if (IS_ERR_OR_NULL(umem_pd)) {
+ kfree(pd);
+ return ERR_PTR(umem_pd ? PTR_ERR(umem_pd) : -ENOMEM);
+ }
+
+ usnic_info("domain 0x%p allocated for context 0x%p and device %s\n",
+ pd, context, ibdev->name);
+ return &pd->ibpd;
+}
+
+int usnic_ib_dealloc_pd(struct ib_pd *pd)
+{
+ usnic_info("freeing domain 0x%p\n", pd);
+
+ usnic_uiom_dealloc_pd((to_upd(pd))->umem_pd);
+ kfree(pd);
+ return 0;
+}
+
+struct ib_qp *usnic_ib_create_qp(struct ib_pd *pd,
+ 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;
+ struct usnic_ib_ucontext *ucontext;
+ int cq_cnt;
+ struct usnic_vnic_res_spec res_spec;
+
+ usnic_dbg("\n");
+
+ ucontext = to_uucontext(pd->uobject->context);
+ us_ibdev = to_usdev(pd->device);
+
+ if (init_attr->qp_type != IB_QPT_UD) {
+ usnic_err("%s asked to make a non-UD QP: %d\n",
+ us_ibdev->ib_dev.name, init_attr->qp_type);
+ return ERR_PTR(-EINVAL);
+ }
+
+ mutex_lock(&us_ibdev->usdev_lock);
+ cq_cnt = (init_attr->send_cq == init_attr->recv_cq) ? 1 : 2,
+ res_spec = min_transport_spec[USNIC_DEFAULT_TRANSPORT];
+ usnic_vnic_res_spec_update(&res_spec, USNIC_VNIC_RES_TYPE_CQ, cq_cnt);
+ qp_grp = find_free_vf_and_create_qp_grp(us_ibdev, to_upd(pd),
+ USNIC_DEFAULT_TRANSPORT,
+ &res_spec);
+ if (IS_ERR_OR_NULL(qp_grp)) {
+ err = (qp_grp ? PTR_ERR(qp_grp) : -ENOMEM);
+ 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 &qp_grp->ibqp;
+
+out_release_qp_grp:
+ qp_grp_destroy(qp_grp);
+out_release_mutex:
+ mutex_unlock(&us_ibdev->usdev_lock);
+ return ERR_PTR(err);
+}
+
+int usnic_ib_destroy_qp(struct ib_qp *qp)
+{
+ 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");
+
+ qp_grp = to_uqp_grp(ibqp);
+
+ /* TODO: Future Support All States */
+ mutex_lock(&qp_grp->vf->pf->usdev_lock);
+ if ((attr_mask & IB_QP_STATE) && attr->qp_state == IB_QPS_INIT) {
+ status = usnic_ib_qp_grp_modify(qp_grp, IB_QPS_INIT,
+ &qp_grp->filters[DFLT_FILTER_IDX]);
+ } else if ((attr_mask & IB_QP_STATE) && attr->qp_state == IB_QPS_RTR) {
+ status = usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RTR, NULL);
+ } else if ((attr_mask & IB_QP_STATE) && attr->qp_state == IB_QPS_RTS) {
+ status = usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RTS, NULL);
+ } else {
+ usnic_err("Unexpected combination mask: %u state: %u\n",
+ attr_mask & IB_QP_STATE, attr->qp_state);
+ status = -EINVAL;
+ }
+
+ mutex_unlock(&qp_grp->vf->pf->usdev_lock);
+ return status;
+}
+
+struct ib_cq *usnic_ib_create_cq(struct ib_device *ibdev, int entries,
+ int vector, struct ib_ucontext *context,
+ struct ib_udata *udata)
+{
+ struct ib_cq *cq;
+
+ usnic_dbg("\n");
+ cq = kzalloc(sizeof(*cq), GFP_KERNEL);
+ if (!cq)
+ return ERR_PTR(-EBUSY);
+
+ return cq;
+}
+
+int usnic_ib_destroy_cq(struct ib_cq *cq)
+{
+ usnic_dbg("\n");
+ kfree(cq);
+ 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 (IS_ERR_OR_NULL(mr))
+ return ERR_PTR(mr ? PTR_ERR(mr) : -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 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, ibmr->pd->uobject->context->closing);
+ kfree(mr);
+ return 0;
+}
+
+struct ib_ucontext *usnic_ib_alloc_ucontext(struct ib_device *ibdev,
+ struct ib_udata *udata)
+{
+ struct usnic_ib_ucontext *context;
+ struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
+ usnic_dbg("\n");
+
+ context = kmalloc(sizeof(*context), GFP_KERNEL);
+ if (!context)
+ return ERR_PTR(-ENOMEM);
+
+ 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 &context->ibucontext;
+}
+
+int 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);
+ BUG_ON(!list_empty(&context->qp_grp_list));
+ list_del(&context->link);
+ mutex_unlock(&us_ibdev->usdev_lock);
+ kfree(context);
+ return 0;
+}
+
+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);
+ vma->vm_flags |= 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;
+}
+
+/* In ib callbacks section - Start of stub funcs */
+struct ib_ah *usnic_ib_create_ah(struct ib_pd *pd,
+ struct ib_ah_attr *ah_attr)
+{
+ usnic_dbg("\n");
+ return ERR_PTR(-EPERM);
+}
+
+int usnic_ib_destroy_ah(struct ib_ah *ah)
+{
+ usnic_dbg("\n");
+ return -EINVAL;
+}
+
+int usnic_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
+ struct ib_send_wr **bad_wr)
+{
+ usnic_dbg("\n");
+ return -EINVAL;
+}
+
+int usnic_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
+ struct ib_recv_wr **bad_wr)
+{
+ usnic_dbg("\n");
+ return -EINVAL;
+}
+
+int usnic_ib_poll_cq(struct ib_cq *ibcq, int num_entries,
+ struct ib_wc *wc)
+{
+ usnic_dbg("\n");
+ return -EINVAL;
+}
+
+int usnic_ib_req_notify_cq(struct ib_cq *cq,
+ enum ib_cq_notify_flags flags)
+{
+ usnic_dbg("\n");
+ return -EINVAL;
+}
+
+struct ib_mr *usnic_ib_get_dma_mr(struct ib_pd *pd, int acc)
+{
+ usnic_dbg("\n");
+ return ERR_PTR(-ENOMEM);
+}
+
+
+/* In ib callbacks section - End of stub funcs */
+/* End of ib callbacks section */