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OpenCloudOS-Kernel/drivers/infiniband/hw/usnic/usnic_ib_verbs.c

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/*
* 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/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 <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 struct usnic_ib_qp_grp*
find_free_vf_and_create_qp_grp(struct usnic_ib_dev *us_ibdev,
struct usnic_ib_pd *pd,
struct usnic_transport_spec *trans_spec,
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;
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 (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 ERR_CAST(dev_list);
for (i = 0; dev_list[i]; i++) {
dev = dev_list[i];
vf = dev_get_drvdata(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",
dev_name(&us_ibdev->ib_dev.dev),
pci_name(usnic_vnic_get_pdev(
vnic)));
qp_grp = usnic_ib_qp_grp_create(us_ibdev->ufdev,
vf, pd,
res_spec,
trans_spec);
spin_unlock(&vf->lock);
goto qp_grp_check;
}
spin_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) {
spin_lock(&vf->lock);
vnic = vf->vnic;
if (vf->qp_grp_ref_cnt == 0 &&
usnic_vnic_check_room(vnic, res_spec) == 0) {
qp_grp = usnic_ib_qp_grp_create(us_ibdev->ufdev, vf,
pd, res_spec,
trans_spec);
spin_unlock(&vf->lock);
goto qp_grp_check;
}
spin_unlock(&vf->lock);
}
usnic_info("No free qp grp found on %s\n",
dev_name(&us_ibdev->ib_dev.dev));
return ERR_PTR(-ENOMEM);
qp_grp_check:
if (IS_ERR_OR_NULL(qp_grp)) {
usnic_err("Failed to allocate qp_grp\n");
if (usnic_ib_share_vf)
usnic_uiom_free_dev_list(dev_list);
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 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,
u8 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 | IB_DEVICE_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;
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);
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->pkey_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, 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_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_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
u16 *pkey)
{
if (index > 0)
return -EINVAL;
*pkey = 0xffff;
return 0;
}
int usnic_ib_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
{
struct usnic_ib_pd *pd = to_upd(ibpd);
void *umem_pd;
umem_pd = pd->umem_pd = usnic_uiom_alloc_pd();
if (IS_ERR_OR_NULL(umem_pd)) {
return umem_pd ? PTR_ERR(umem_pd) : -ENOMEM;
}
return 0;
}
void usnic_ib_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata)
{
usnic_uiom_dealloc_pd((to_upd(pd))->umem_pd);
}
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 = 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(pd->device);
if (init_attr->create_flags)
return ERR_PTR(-EINVAL);
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 ERR_PTR(-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 ERR_PTR(-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 ERR_PTR(-EINVAL);
}
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);
qp_grp = find_free_vf_and_create_qp_grp(us_ibdev, to_upd(pd),
&trans_spec,
&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 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");
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 ib_udata *udata)
{
if (attr->flags)
return -EINVAL;
return 0;
}
void usnic_ib_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)
{
return;
}
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);
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;
}
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