diff options
Diffstat (limited to 'drivers/infiniband/hw/usnic/usnic_ib_qp_grp.c')
| -rw-r--r-- | drivers/infiniband/hw/usnic/usnic_ib_qp_grp.c | 766 |
1 files changed, 766 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/usnic/usnic_ib_qp_grp.c b/drivers/infiniband/hw/usnic/usnic_ib_qp_grp.c new file mode 100644 index 000000000..0cdb156e1 --- /dev/null +++ b/drivers/infiniband/hw/usnic/usnic_ib_qp_grp.c @@ -0,0 +1,766 @@ +/* + * 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/bug.h> +#include <linux/errno.h> +#include <linux/module.h> +#include <linux/spinlock.h> + +#include "usnic_log.h" +#include "usnic_vnic.h" +#include "usnic_fwd.h" +#include "usnic_uiom.h" +#include "usnic_debugfs.h" +#include "usnic_ib_qp_grp.h" +#include "usnic_ib_sysfs.h" +#include "usnic_transport.h" + +#define DFLT_RQ_IDX 0 + +const char *usnic_ib_qp_grp_state_to_string(enum ib_qp_state state) +{ + switch (state) { + case IB_QPS_RESET: + return "Rst"; + case IB_QPS_INIT: + return "Init"; + case IB_QPS_RTR: + return "RTR"; + case IB_QPS_RTS: + return "RTS"; + case IB_QPS_SQD: + return "SQD"; + case IB_QPS_SQE: + return "SQE"; + case IB_QPS_ERR: + return "ERR"; + default: + return "UNKNOWN STATE"; + + } +} + +int usnic_ib_qp_grp_dump_hdr(char *buf, int buf_sz) +{ + return scnprintf(buf, buf_sz, "|QPN\t|State\t|PID\t|VF Idx\t|Fil ID"); +} + +int usnic_ib_qp_grp_dump_rows(void *obj, char *buf, int buf_sz) +{ + struct usnic_ib_qp_grp *qp_grp = obj; + struct usnic_ib_qp_grp_flow *default_flow; + if (obj) { + default_flow = list_first_entry(&qp_grp->flows_lst, + struct usnic_ib_qp_grp_flow, link); + return scnprintf(buf, buf_sz, "|%d\t|%s\t|%d\t|%hu\t|%d", + qp_grp->ibqp.qp_num, + usnic_ib_qp_grp_state_to_string( + qp_grp->state), + qp_grp->owner_pid, + usnic_vnic_get_index(qp_grp->vf->vnic), + default_flow->flow->flow_id); + } else { + return scnprintf(buf, buf_sz, "|N/A\t|N/A\t|N/A\t|N/A\t|N/A"); + } +} + +static struct usnic_vnic_res_chunk * +get_qp_res_chunk(struct usnic_ib_qp_grp *qp_grp) +{ + lockdep_assert_held(&qp_grp->lock); + /* + * The QP res chunk, used to derive qp indices, + * are just indices of the RQs + */ + return usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_RQ); +} + +static int enable_qp_grp(struct usnic_ib_qp_grp *qp_grp) +{ + + int status; + int i, vnic_idx; + struct usnic_vnic_res_chunk *res_chunk; + struct usnic_vnic_res *res; + + lockdep_assert_held(&qp_grp->lock); + + vnic_idx = usnic_vnic_get_index(qp_grp->vf->vnic); + + res_chunk = get_qp_res_chunk(qp_grp); + if (IS_ERR(res_chunk)) { + usnic_err("Unable to get qp res with err %ld\n", + PTR_ERR(res_chunk)); + return PTR_ERR(res_chunk); + } + + for (i = 0; i < res_chunk->cnt; i++) { + res = res_chunk->res[i]; + status = usnic_fwd_enable_qp(qp_grp->ufdev, vnic_idx, + res->vnic_idx); + if (status) { + usnic_err("Failed to enable qp %d of %s:%d\n with err %d\n", + res->vnic_idx, qp_grp->ufdev->name, + vnic_idx, status); + goto out_err; + } + } + + return 0; + +out_err: + for (i--; i >= 0; i--) { + res = res_chunk->res[i]; + usnic_fwd_disable_qp(qp_grp->ufdev, vnic_idx, + res->vnic_idx); + } + + return status; +} + +static int disable_qp_grp(struct usnic_ib_qp_grp *qp_grp) +{ + int i, vnic_idx; + struct usnic_vnic_res_chunk *res_chunk; + struct usnic_vnic_res *res; + int status = 0; + + lockdep_assert_held(&qp_grp->lock); + vnic_idx = usnic_vnic_get_index(qp_grp->vf->vnic); + + res_chunk = get_qp_res_chunk(qp_grp); + if (IS_ERR(res_chunk)) { + usnic_err("Unable to get qp res with err %ld\n", + PTR_ERR(res_chunk)); + return PTR_ERR(res_chunk); + } + + for (i = 0; i < res_chunk->cnt; i++) { + res = res_chunk->res[i]; + status = usnic_fwd_disable_qp(qp_grp->ufdev, vnic_idx, + res->vnic_idx); + if (status) { + usnic_err("Failed to disable rq %d of %s:%d\n with err %d\n", + res->vnic_idx, + qp_grp->ufdev->name, + vnic_idx, status); + } + } + + return status; + +} + +static int init_filter_action(struct usnic_ib_qp_grp *qp_grp, + struct usnic_filter_action *uaction) +{ + struct usnic_vnic_res_chunk *res_chunk; + + res_chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_RQ); + if (IS_ERR(res_chunk)) { + usnic_err("Unable to get %s with err %ld\n", + usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_RQ), + PTR_ERR(res_chunk)); + return PTR_ERR(res_chunk); + } + + uaction->vnic_idx = usnic_vnic_get_index(qp_grp->vf->vnic); + uaction->action.type = FILTER_ACTION_RQ_STEERING; + uaction->action.u.rq_idx = res_chunk->res[DFLT_RQ_IDX]->vnic_idx; + + return 0; +} + +static struct usnic_ib_qp_grp_flow* +create_roce_custom_flow(struct usnic_ib_qp_grp *qp_grp, + struct usnic_transport_spec *trans_spec) +{ + uint16_t port_num; + int err; + struct filter filter; + struct usnic_filter_action uaction; + struct usnic_ib_qp_grp_flow *qp_flow; + struct usnic_fwd_flow *flow; + enum usnic_transport_type trans_type; + + trans_type = trans_spec->trans_type; + port_num = trans_spec->usnic_roce.port_num; + + /* Reserve Port */ + port_num = usnic_transport_rsrv_port(trans_type, port_num); + if (port_num == 0) + return ERR_PTR(-EINVAL); + + /* Create Flow */ + usnic_fwd_init_usnic_filter(&filter, port_num); + err = init_filter_action(qp_grp, &uaction); + if (err) + goto out_unreserve_port; + + flow = usnic_fwd_alloc_flow(qp_grp->ufdev, &filter, &uaction); + if (IS_ERR_OR_NULL(flow)) { + err = flow ? PTR_ERR(flow) : -EFAULT; + goto out_unreserve_port; + } + + /* Create Flow Handle */ + qp_flow = kzalloc(sizeof(*qp_flow), GFP_ATOMIC); + if (!qp_flow) { + err = -ENOMEM; + goto out_dealloc_flow; + } + qp_flow->flow = flow; + qp_flow->trans_type = trans_type; + qp_flow->usnic_roce.port_num = port_num; + qp_flow->qp_grp = qp_grp; + return qp_flow; + +out_dealloc_flow: + usnic_fwd_dealloc_flow(flow); +out_unreserve_port: + usnic_transport_unrsrv_port(trans_type, port_num); + return ERR_PTR(err); +} + +static void release_roce_custom_flow(struct usnic_ib_qp_grp_flow *qp_flow) +{ + usnic_fwd_dealloc_flow(qp_flow->flow); + usnic_transport_unrsrv_port(qp_flow->trans_type, + qp_flow->usnic_roce.port_num); + kfree(qp_flow); +} + +static struct usnic_ib_qp_grp_flow* +create_udp_flow(struct usnic_ib_qp_grp *qp_grp, + struct usnic_transport_spec *trans_spec) +{ + struct socket *sock; + int sock_fd; + int err; + struct filter filter; + struct usnic_filter_action uaction; + struct usnic_ib_qp_grp_flow *qp_flow; + struct usnic_fwd_flow *flow; + enum usnic_transport_type trans_type; + uint32_t addr; + uint16_t port_num; + int proto; + + trans_type = trans_spec->trans_type; + sock_fd = trans_spec->udp.sock_fd; + + /* Get and check socket */ + sock = usnic_transport_get_socket(sock_fd); + if (IS_ERR_OR_NULL(sock)) + return ERR_CAST(sock); + + err = usnic_transport_sock_get_addr(sock, &proto, &addr, &port_num); + if (err) + goto out_put_sock; + + if (proto != IPPROTO_UDP) { + usnic_err("Protocol for fd %d is not UDP", sock_fd); + err = -EPERM; + goto out_put_sock; + } + + /* Create flow */ + usnic_fwd_init_udp_filter(&filter, addr, port_num); + err = init_filter_action(qp_grp, &uaction); + if (err) + goto out_put_sock; + + flow = usnic_fwd_alloc_flow(qp_grp->ufdev, &filter, &uaction); + if (IS_ERR_OR_NULL(flow)) { + err = flow ? PTR_ERR(flow) : -EFAULT; + goto out_put_sock; + } + + /* Create qp_flow */ + qp_flow = kzalloc(sizeof(*qp_flow), GFP_ATOMIC); + if (!qp_flow) { + err = -ENOMEM; + goto out_dealloc_flow; + } + qp_flow->flow = flow; + qp_flow->trans_type = trans_type; + qp_flow->udp.sock = sock; + qp_flow->qp_grp = qp_grp; + return qp_flow; + +out_dealloc_flow: + usnic_fwd_dealloc_flow(flow); +out_put_sock: + usnic_transport_put_socket(sock); + return ERR_PTR(err); +} + +static void release_udp_flow(struct usnic_ib_qp_grp_flow *qp_flow) +{ + usnic_fwd_dealloc_flow(qp_flow->flow); + usnic_transport_put_socket(qp_flow->udp.sock); + kfree(qp_flow); +} + +static struct usnic_ib_qp_grp_flow* +create_and_add_flow(struct usnic_ib_qp_grp *qp_grp, + struct usnic_transport_spec *trans_spec) +{ + struct usnic_ib_qp_grp_flow *qp_flow; + enum usnic_transport_type trans_type; + + trans_type = trans_spec->trans_type; + switch (trans_type) { + case USNIC_TRANSPORT_ROCE_CUSTOM: + qp_flow = create_roce_custom_flow(qp_grp, trans_spec); + break; + case USNIC_TRANSPORT_IPV4_UDP: + qp_flow = create_udp_flow(qp_grp, trans_spec); + break; + default: + usnic_err("Unsupported transport %u\n", + trans_spec->trans_type); + return ERR_PTR(-EINVAL); + } + + if (!IS_ERR_OR_NULL(qp_flow)) { + list_add_tail(&qp_flow->link, &qp_grp->flows_lst); + usnic_debugfs_flow_add(qp_flow); + } + + + return qp_flow; +} + +static void release_and_remove_flow(struct usnic_ib_qp_grp_flow *qp_flow) +{ + usnic_debugfs_flow_remove(qp_flow); + list_del(&qp_flow->link); + + switch (qp_flow->trans_type) { + case USNIC_TRANSPORT_ROCE_CUSTOM: + release_roce_custom_flow(qp_flow); + break; + case USNIC_TRANSPORT_IPV4_UDP: + release_udp_flow(qp_flow); + break; + default: + WARN(1, "Unsupported transport %u\n", + qp_flow->trans_type); + break; + } +} + +static void release_and_remove_all_flows(struct usnic_ib_qp_grp *qp_grp) +{ + struct usnic_ib_qp_grp_flow *qp_flow, *tmp; + list_for_each_entry_safe(qp_flow, tmp, &qp_grp->flows_lst, link) + release_and_remove_flow(qp_flow); +} + +int usnic_ib_qp_grp_modify(struct usnic_ib_qp_grp *qp_grp, + enum ib_qp_state new_state, + void *data) +{ + int status = 0; + struct ib_event ib_event; + enum ib_qp_state old_state; + struct usnic_transport_spec *trans_spec; + struct usnic_ib_qp_grp_flow *qp_flow; + + old_state = qp_grp->state; + trans_spec = (struct usnic_transport_spec *) data; + + spin_lock(&qp_grp->lock); + switch (new_state) { + case IB_QPS_RESET: + switch (old_state) { + case IB_QPS_RESET: + /* NO-OP */ + break; + case IB_QPS_INIT: + release_and_remove_all_flows(qp_grp); + status = 0; + break; + case IB_QPS_RTR: + case IB_QPS_RTS: + case IB_QPS_ERR: + status = disable_qp_grp(qp_grp); + release_and_remove_all_flows(qp_grp); + break; + default: + status = -EINVAL; + } + break; + case IB_QPS_INIT: + switch (old_state) { + case IB_QPS_RESET: + if (trans_spec) { + qp_flow = create_and_add_flow(qp_grp, + trans_spec); + if (IS_ERR_OR_NULL(qp_flow)) { + status = qp_flow ? PTR_ERR(qp_flow) : -EFAULT; + break; + } + } else { + /* + * Optional to specify filters. + */ + status = 0; + } + break; + case IB_QPS_INIT: + if (trans_spec) { + qp_flow = create_and_add_flow(qp_grp, + trans_spec); + if (IS_ERR_OR_NULL(qp_flow)) { + status = qp_flow ? PTR_ERR(qp_flow) : -EFAULT; + break; + } + } else { + /* + * Doesn't make sense to go into INIT state + * from INIT state w/o adding filters. + */ + status = -EINVAL; + } + break; + case IB_QPS_RTR: + status = disable_qp_grp(qp_grp); + break; + case IB_QPS_RTS: + status = disable_qp_grp(qp_grp); + break; + default: + status = -EINVAL; + } + break; + case IB_QPS_RTR: + switch (old_state) { + case IB_QPS_INIT: + status = enable_qp_grp(qp_grp); + break; + default: + status = -EINVAL; + } + break; + case IB_QPS_RTS: + switch (old_state) { + case IB_QPS_RTR: + /* NO-OP FOR NOW */ + break; + default: + status = -EINVAL; + } + break; + case IB_QPS_ERR: + ib_event.device = &qp_grp->vf->pf->ib_dev; + ib_event.element.qp = &qp_grp->ibqp; + ib_event.event = IB_EVENT_QP_FATAL; + + switch (old_state) { + case IB_QPS_RESET: + qp_grp->ibqp.event_handler(&ib_event, + qp_grp->ibqp.qp_context); + break; + case IB_QPS_INIT: + release_and_remove_all_flows(qp_grp); + qp_grp->ibqp.event_handler(&ib_event, + qp_grp->ibqp.qp_context); + break; + case IB_QPS_RTR: + case IB_QPS_RTS: + status = disable_qp_grp(qp_grp); + release_and_remove_all_flows(qp_grp); + qp_grp->ibqp.event_handler(&ib_event, + qp_grp->ibqp.qp_context); + break; + default: + status = -EINVAL; + } + break; + default: + status = -EINVAL; + } + spin_unlock(&qp_grp->lock); + + if (!status) { + qp_grp->state = new_state; + usnic_info("Transitioned %u from %s to %s", + qp_grp->grp_id, + usnic_ib_qp_grp_state_to_string(old_state), + usnic_ib_qp_grp_state_to_string(new_state)); + } else { + usnic_err("Failed to transition %u from %s to %s", + qp_grp->grp_id, + usnic_ib_qp_grp_state_to_string(old_state), + usnic_ib_qp_grp_state_to_string(new_state)); + } + + return status; +} + +static struct usnic_vnic_res_chunk** +alloc_res_chunk_list(struct usnic_vnic *vnic, + struct usnic_vnic_res_spec *res_spec, void *owner_obj) +{ + enum usnic_vnic_res_type res_type; + struct usnic_vnic_res_chunk **res_chunk_list; + int err, i, res_cnt, res_lst_sz; + + for (res_lst_sz = 0; + res_spec->resources[res_lst_sz].type != USNIC_VNIC_RES_TYPE_EOL; + res_lst_sz++) { + /* Do Nothing */ + } + + res_chunk_list = kcalloc(res_lst_sz + 1, sizeof(*res_chunk_list), + GFP_ATOMIC); + if (!res_chunk_list) + return ERR_PTR(-ENOMEM); + + for (i = 0; res_spec->resources[i].type != USNIC_VNIC_RES_TYPE_EOL; + i++) { + res_type = res_spec->resources[i].type; + res_cnt = res_spec->resources[i].cnt; + + res_chunk_list[i] = usnic_vnic_get_resources(vnic, res_type, + res_cnt, owner_obj); + if (IS_ERR_OR_NULL(res_chunk_list[i])) { + err = res_chunk_list[i] ? + PTR_ERR(res_chunk_list[i]) : -ENOMEM; + usnic_err("Failed to get %s from %s with err %d\n", + usnic_vnic_res_type_to_str(res_type), + usnic_vnic_pci_name(vnic), + err); + goto out_free_res; + } + } + + return res_chunk_list; + +out_free_res: + for (i--; i >= 0; i--) + usnic_vnic_put_resources(res_chunk_list[i]); + kfree(res_chunk_list); + return ERR_PTR(err); +} + +static void free_qp_grp_res(struct usnic_vnic_res_chunk **res_chunk_list) +{ + int i; + for (i = 0; res_chunk_list[i]; i++) + usnic_vnic_put_resources(res_chunk_list[i]); + kfree(res_chunk_list); +} + +static int qp_grp_and_vf_bind(struct usnic_ib_vf *vf, + struct usnic_ib_pd *pd, + struct usnic_ib_qp_grp *qp_grp) +{ + int err; + struct pci_dev *pdev; + + lockdep_assert_held(&vf->lock); + + pdev = usnic_vnic_get_pdev(vf->vnic); + if (vf->qp_grp_ref_cnt == 0) { + err = usnic_uiom_attach_dev_to_pd(pd->umem_pd, &pdev->dev); + if (err) { + usnic_err("Failed to attach %s to domain\n", + pci_name(pdev)); + return err; + } + vf->pd = pd; + } + vf->qp_grp_ref_cnt++; + + WARN_ON(vf->pd != pd); + qp_grp->vf = vf; + + return 0; +} + +static void qp_grp_and_vf_unbind(struct usnic_ib_qp_grp *qp_grp) +{ + struct pci_dev *pdev; + struct usnic_ib_pd *pd; + + lockdep_assert_held(&qp_grp->vf->lock); + + pd = qp_grp->vf->pd; + pdev = usnic_vnic_get_pdev(qp_grp->vf->vnic); + if (--qp_grp->vf->qp_grp_ref_cnt == 0) { + qp_grp->vf->pd = NULL; + usnic_uiom_detach_dev_from_pd(pd->umem_pd, &pdev->dev); + } + qp_grp->vf = NULL; +} + +static void log_spec(struct usnic_vnic_res_spec *res_spec) +{ + char buf[512]; + usnic_vnic_spec_dump(buf, sizeof(buf), res_spec); + usnic_dbg("%s\n", buf); +} + +static int qp_grp_id_from_flow(struct usnic_ib_qp_grp_flow *qp_flow, + uint32_t *id) +{ + enum usnic_transport_type trans_type = qp_flow->trans_type; + int err; + uint16_t port_num = 0; + + switch (trans_type) { + case USNIC_TRANSPORT_ROCE_CUSTOM: + *id = qp_flow->usnic_roce.port_num; + break; + case USNIC_TRANSPORT_IPV4_UDP: + err = usnic_transport_sock_get_addr(qp_flow->udp.sock, + NULL, NULL, + &port_num); + if (err) + return err; + /* + * Copy port_num to stack first and then to *id, + * so that the short to int cast works for little + * and big endian systems. + */ + *id = port_num; + break; + default: + usnic_err("Unsupported transport %u\n", trans_type); + return -EINVAL; + } + + return 0; +} + +struct usnic_ib_qp_grp * +usnic_ib_qp_grp_create(struct usnic_fwd_dev *ufdev, struct usnic_ib_vf *vf, + struct usnic_ib_pd *pd, + struct usnic_vnic_res_spec *res_spec, + struct usnic_transport_spec *transport_spec) +{ + struct usnic_ib_qp_grp *qp_grp; + int err; + enum usnic_transport_type transport = transport_spec->trans_type; + struct usnic_ib_qp_grp_flow *qp_flow; + + lockdep_assert_held(&vf->lock); + + err = usnic_vnic_res_spec_satisfied(&min_transport_spec[transport], + res_spec); + if (err) { + usnic_err("Spec does not meet minimum req for transport %d\n", + transport); + log_spec(res_spec); + return ERR_PTR(err); + } + + qp_grp = kzalloc(sizeof(*qp_grp), GFP_ATOMIC); + if (!qp_grp) + return NULL; + + qp_grp->res_chunk_list = alloc_res_chunk_list(vf->vnic, res_spec, + qp_grp); + if (IS_ERR_OR_NULL(qp_grp->res_chunk_list)) { + err = qp_grp->res_chunk_list ? + PTR_ERR(qp_grp->res_chunk_list) : -ENOMEM; + goto out_free_qp_grp; + } + + err = qp_grp_and_vf_bind(vf, pd, qp_grp); + if (err) + goto out_free_res; + + INIT_LIST_HEAD(&qp_grp->flows_lst); + spin_lock_init(&qp_grp->lock); + qp_grp->ufdev = ufdev; + qp_grp->state = IB_QPS_RESET; + qp_grp->owner_pid = current->pid; + + qp_flow = create_and_add_flow(qp_grp, transport_spec); + if (IS_ERR_OR_NULL(qp_flow)) { + usnic_err("Unable to create and add flow with err %ld\n", + PTR_ERR(qp_flow)); + err = qp_flow ? PTR_ERR(qp_flow) : -EFAULT; + goto out_qp_grp_vf_unbind; + } + + err = qp_grp_id_from_flow(qp_flow, &qp_grp->grp_id); + if (err) + goto out_release_flow; + qp_grp->ibqp.qp_num = qp_grp->grp_id; + + usnic_ib_sysfs_qpn_add(qp_grp); + + return qp_grp; + +out_release_flow: + release_and_remove_flow(qp_flow); +out_qp_grp_vf_unbind: + qp_grp_and_vf_unbind(qp_grp); +out_free_res: + free_qp_grp_res(qp_grp->res_chunk_list); +out_free_qp_grp: + kfree(qp_grp); + + return ERR_PTR(err); +} + +void usnic_ib_qp_grp_destroy(struct usnic_ib_qp_grp *qp_grp) +{ + + WARN_ON(qp_grp->state != IB_QPS_RESET); + lockdep_assert_held(&qp_grp->vf->lock); + + release_and_remove_all_flows(qp_grp); + usnic_ib_sysfs_qpn_remove(qp_grp); + qp_grp_and_vf_unbind(qp_grp); + free_qp_grp_res(qp_grp->res_chunk_list); + kfree(qp_grp); +} + +struct usnic_vnic_res_chunk* +usnic_ib_qp_grp_get_chunk(struct usnic_ib_qp_grp *qp_grp, + enum usnic_vnic_res_type res_type) +{ + int i; + + for (i = 0; qp_grp->res_chunk_list[i]; i++) { + if (qp_grp->res_chunk_list[i]->type == res_type) + return qp_grp->res_chunk_list[i]; + } + + return ERR_PTR(-EINVAL); +} |