/*
* Copyright (c) 2017, Mellanox Technologies 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
* OpenIB.org 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 <rdma/uverbs_std_types.h>
#include "rdma_core.h"
#include "uverbs.h"
#include "restrack.h"
static int uverbs_free_cq(struct ib_uobject *uobject,
enum rdma_remove_reason why,
struct uverbs_attr_bundle *attrs)
{
struct ib_cq *cq = uobject->object;
struct ib_uverbs_event_queue *ev_queue = cq->cq_context;
struct ib_ucq_object *ucq =
container_of(uobject, struct ib_ucq_object, uevent.uobject);
int ret;
ret = ib_destroy_cq_user(cq, &attrs->driver_udata);
if (ret)
return ret;
ib_uverbs_release_ucq(
ev_queue ? container_of(ev_queue,
struct ib_uverbs_completion_event_file,
ev_queue) :
NULL,
ucq);
return 0;
}
static int UVERBS_HANDLER(UVERBS_METHOD_CQ_CREATE)(
struct uverbs_attr_bundle *attrs)
{
struct ib_ucq_object *obj = container_of(
uverbs_attr_get_uobject(attrs, UVERBS_ATTR_CREATE_CQ_HANDLE),
typeof(*obj), uevent.uobject);
struct ib_device *ib_dev = attrs->context->device;
int ret;
u64 user_handle;
struct ib_cq_init_attr attr = {};
struct ib_cq *cq;
struct ib_uverbs_completion_event_file *ev_file = NULL;
struct ib_uobject *ev_file_uobj;
if (!ib_dev->ops.create_cq || !ib_dev->ops.destroy_cq)
return -EOPNOTSUPP;
ret = uverbs_copy_from(&attr.comp_vector, attrs,
UVERBS_ATTR_CREATE_CQ_COMP_VECTOR);
if (!ret)
ret = uverbs_copy_from(&attr.cqe, attrs,
UVERBS_ATTR_CREATE_CQ_CQE);
if (!ret)
ret = uverbs_copy_from(&user_handle, attrs,
UVERBS_ATTR_CREATE_CQ_USER_HANDLE);
if (ret)
return ret;
ret = uverbs_get_flags32(&attr.flags, attrs,
UVERBS_ATTR_CREATE_CQ_FLAGS,
IB_UVERBS_CQ_FLAGS_TIMESTAMP_COMPLETION |
IB_UVERBS_CQ_FLAGS_IGNORE_OVERRUN);
if (ret)
return ret;
ev_file_uobj = uverbs_attr_get_uobject(attrs, UVERBS_ATTR_CREATE_CQ_COMP_CHANNEL);
if (!IS_ERR(ev_file_uobj)) {
ev_file = container_of(ev_file_uobj,
struct ib_uverbs_completion_event_file,
uobj);
uverbs_uobject_get(ev_file_uobj);
}
obj->uevent.event_file = ib_uverbs_get_async_event(
attrs, UVERBS_ATTR_CREATE_CQ_EVENT_FD);
if (attr.comp_vector >= attrs->ufile->device->num_comp_vectors) {
ret = -EINVAL;
goto err_event_file;
}
INIT_LIST_HEAD(&obj->comp_list);
INIT_LIST_HEAD(&obj->uevent.event_list);
cq = rdma_zalloc_drv_obj(ib_dev, ib_cq);
if (!cq) {
ret = -ENOMEM;
goto err_event_file;
}
cq->device = ib_dev;
cq->uobject = obj;
cq->comp_handler = ib_uverbs_comp_handler;
cq->event_handler = ib_uverbs_cq_event_handler;
cq->cq_context = ev_file ? &ev_file->ev_queue : NULL;
atomic_set(&cq->usecnt, 0);
rdma_restrack_new(&cq->res, RDMA_RESTRACK_CQ);
rdma_restrack_set_name(&cq->res, NULL);
ret = ib_dev->ops.create_cq(cq, &attr, attrs);
if (ret)
goto err_free;
obj->uevent.uobject.object = cq;
obj->uevent.uobject.user_handle = user_handle;
rdma_restrack_add(&cq->res);
uverbs_finalize_uobj_create(attrs, UVERBS_ATTR_CREATE_CQ_HANDLE);
ret = uverbs_copy_to(attrs, UVERBS_ATTR_CREATE_CQ_RESP_CQE, &cq->cqe,
sizeof(cq->cqe));
return ret;
err_free:
rdma_restrack_put(&cq->res);
kfree(cq);
err_event_file:
if (obj->uevent.event_file)
uverbs_uobject_put(&obj->uevent.event_file->uobj);
if (ev_file)
uverbs_uobject_put(ev_file_uobj);
return ret;
};
DECLARE_UVERBS_NAMED_METHOD(
UVERBS_METHOD_CQ_CREATE,
UVERBS_ATTR_IDR(UVERBS_ATTR_CREATE_CQ_HANDLE,
UVERBS_OBJECT_CQ,
UVERBS_ACCESS_NEW,
UA_MANDATORY),
UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_CQ_CQE,
UVERBS_ATTR_TYPE(u32),
UA_MANDATORY),
UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_CQ_USER_HANDLE,
UVERBS_ATTR_TYPE(u64),
UA_MANDATORY),
UVERBS_ATTR_FD(UVERBS_ATTR_CREATE_CQ_COMP_CHANNEL,
UVERBS_OBJECT_COMP_CHANNEL,
UVERBS_ACCESS_READ,
UA_OPTIONAL),
UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_CQ_COMP_VECTOR,
UVERBS_ATTR_TYPE(u32),
UA_MANDATORY),
UVERBS_ATTR_FLAGS_IN(UVERBS_ATTR_CREATE_CQ_FLAGS,
enum ib_uverbs_ex_create_cq_flags),
UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_CREATE_CQ_RESP_CQE,
UVERBS_ATTR_TYPE(u32),
UA_MANDATORY),
UVERBS_ATTR_FD(UVERBS_ATTR_CREATE_CQ_EVENT_FD,
UVERBS_OBJECT_ASYNC_EVENT,
UVERBS_ACCESS_READ,
UA_OPTIONAL),
UVERBS_ATTR_UHW());
static int UVERBS_HANDLER(UVERBS_METHOD_CQ_DESTROY)(
struct uverbs_attr_bundle *attrs)
{
struct ib_uobject *uobj =
uverbs_attr_get_uobject(attrs, UVERBS_ATTR_DESTROY_CQ_HANDLE);
struct ib_ucq_object *obj =
container_of(uobj, struct ib_ucq_object, uevent.uobject);
struct ib_uverbs_destroy_cq_resp resp = {
.comp_events_reported = obj->comp_events_reported,
.async_events_reported = obj->uevent.events_reported
};
return uverbs_copy_to(attrs, UVERBS_ATTR_DESTROY_CQ_RESP, &resp,
sizeof(resp));
}
DECLARE_UVERBS_NAMED_METHOD(
UVERBS_METHOD_CQ_DESTROY,
UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_CQ_HANDLE,
UVERBS_OBJECT_CQ,
UVERBS_ACCESS_DESTROY,
UA_MANDATORY),
UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_DESTROY_CQ_RESP,
UVERBS_ATTR_TYPE(struct ib_uverbs_destroy_cq_resp),
UA_MANDATORY));
DECLARE_UVERBS_NAMED_OBJECT(
UVERBS_OBJECT_CQ,
UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_ucq_object), uverbs_free_cq),
&UVERBS_METHOD(UVERBS_METHOD_CQ_CREATE),
&UVERBS_METHOD(UVERBS_METHOD_CQ_DESTROY)
);
const struct uapi_definition uverbs_def_obj_cq[] = {
UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_CQ,
UAPI_DEF_OBJ_NEEDS_FN(destroy_cq)),
{}
};
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