131529Shelbig/*
231529Shelbig * Copyright (c) 2017, Mellanox Technologies inc.  All rights reserved.
331529Shelbig *
431529Shelbig * This software is available to you under a choice of one of two
531529Shelbig * licenses.  You may choose to be licensed under the terms of the GNU
631529Shelbig * General Public License (GPL) Version 2, available from the file
731529Shelbig * COPYING in the main directory of this source tree, or the
831529Shelbig * OpenIB.org BSD license below:
931529Shelbig *
1031529Shelbig *     Redistribution and use in source and binary forms, with or
1131529Shelbig *     without modification, are permitted provided that the following
1231529Shelbig *     conditions are met:
1331529Shelbig *
1431529Shelbig *      - Redistributions of source code must retain the above
1531529Shelbig *        copyright notice, this list of conditions and the following
1631529Shelbig *        disclaimer.
1731529Shelbig *
1831529Shelbig *      - Redistributions in binary form must reproduce the above
1931529Shelbig *        copyright notice, this list of conditions and the following
2031529Shelbig *        disclaimer in the documentation and/or other materials
2131529Shelbig *        provided with the distribution.
2231529Shelbig *
2331529Shelbig * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
2431529Shelbig * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
2531529Shelbig * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
2650476Speter * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
2731529Shelbig * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
2831698Shelbig * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
2931529Shelbig * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
3031529Shelbig * SOFTWARE.
3131529Shelbig */
3231698Shelbig
3331529Shelbig#include <rdma/uverbs_std_types.h>
3431698Shelbig#include "rdma_core.h"
3531698Shelbig#include "uverbs.h"
3631698Shelbig#include "restrack.h"
3731698Shelbig
3831698Shelbigstatic int uverbs_free_cq(struct ib_uobject *uobject,
3931698Shelbig			  enum rdma_remove_reason why,
4031698Shelbig			  struct uverbs_attr_bundle *attrs)
4131698Shelbig{
4231698Shelbig	struct ib_cq *cq = uobject->object;
43	struct ib_uverbs_event_queue *ev_queue = cq->cq_context;
44	struct ib_ucq_object *ucq =
45		container_of(uobject, struct ib_ucq_object, uevent.uobject);
46	int ret;
47
48	ret = ib_destroy_cq_user(cq, &attrs->driver_udata);
49	if (ret)
50		return ret;
51
52	ib_uverbs_release_ucq(
53		ev_queue ? container_of(ev_queue,
54					struct ib_uverbs_completion_event_file,
55					ev_queue) :
56			   NULL,
57		ucq);
58	return 0;
59}
60
61static int UVERBS_HANDLER(UVERBS_METHOD_CQ_CREATE)(
62	struct uverbs_attr_bundle *attrs)
63{
64	struct ib_ucq_object *obj = container_of(
65		uverbs_attr_get_uobject(attrs, UVERBS_ATTR_CREATE_CQ_HANDLE),
66		typeof(*obj), uevent.uobject);
67	struct ib_device *ib_dev = attrs->context->device;
68	int ret;
69	u64 user_handle;
70	struct ib_cq_init_attr attr = {};
71	struct ib_cq                   *cq;
72	struct ib_uverbs_completion_event_file    *ev_file = NULL;
73	struct ib_uobject *ev_file_uobj;
74
75	if (!ib_dev->ops.create_cq || !ib_dev->ops.destroy_cq)
76		return -EOPNOTSUPP;
77
78	ret = uverbs_copy_from(&attr.comp_vector, attrs,
79			       UVERBS_ATTR_CREATE_CQ_COMP_VECTOR);
80	if (!ret)
81		ret = uverbs_copy_from(&attr.cqe, attrs,
82				       UVERBS_ATTR_CREATE_CQ_CQE);
83	if (!ret)
84		ret = uverbs_copy_from(&user_handle, attrs,
85				       UVERBS_ATTR_CREATE_CQ_USER_HANDLE);
86	if (ret)
87		return ret;
88
89	ret = uverbs_get_flags32(&attr.flags, attrs,
90				 UVERBS_ATTR_CREATE_CQ_FLAGS,
91				 IB_UVERBS_CQ_FLAGS_TIMESTAMP_COMPLETION |
92					 IB_UVERBS_CQ_FLAGS_IGNORE_OVERRUN);
93	if (ret)
94		return ret;
95
96	ev_file_uobj = uverbs_attr_get_uobject(attrs, UVERBS_ATTR_CREATE_CQ_COMP_CHANNEL);
97	if (!IS_ERR(ev_file_uobj)) {
98		ev_file = container_of(ev_file_uobj,
99				       struct ib_uverbs_completion_event_file,
100				       uobj);
101		uverbs_uobject_get(ev_file_uobj);
102	}
103
104	obj->uevent.event_file = ib_uverbs_get_async_event(
105		attrs, UVERBS_ATTR_CREATE_CQ_EVENT_FD);
106
107	if (attr.comp_vector >= attrs->ufile->device->num_comp_vectors) {
108		ret = -EINVAL;
109		goto err_event_file;
110	}
111
112	INIT_LIST_HEAD(&obj->comp_list);
113	INIT_LIST_HEAD(&obj->uevent.event_list);
114
115	cq = rdma_zalloc_drv_obj(ib_dev, ib_cq);
116	if (!cq) {
117		ret = -ENOMEM;
118		goto err_event_file;
119	}
120
121	cq->device        = ib_dev;
122	cq->uobject       = obj;
123	cq->comp_handler  = ib_uverbs_comp_handler;
124	cq->event_handler = ib_uverbs_cq_event_handler;
125	cq->cq_context    = ev_file ? &ev_file->ev_queue : NULL;
126	atomic_set(&cq->usecnt, 0);
127
128	rdma_restrack_new(&cq->res, RDMA_RESTRACK_CQ);
129	rdma_restrack_set_name(&cq->res, NULL);
130
131	ret = ib_dev->ops.create_cq(cq, &attr, &attrs->driver_udata);
132	if (ret)
133		goto err_free;
134
135	obj->uevent.uobject.object = cq;
136	obj->uevent.uobject.user_handle = user_handle;
137	rdma_restrack_add(&cq->res);
138	uverbs_finalize_uobj_create(attrs, UVERBS_ATTR_CREATE_CQ_HANDLE);
139
140	ret = uverbs_copy_to(attrs, UVERBS_ATTR_CREATE_CQ_RESP_CQE, &cq->cqe,
141			     sizeof(cq->cqe));
142	return ret;
143
144err_free:
145	rdma_restrack_put(&cq->res);
146	kfree(cq);
147err_event_file:
148	if (obj->uevent.event_file)
149		uverbs_uobject_put(&obj->uevent.event_file->uobj);
150	if (ev_file)
151		uverbs_uobject_put(ev_file_uobj);
152	return ret;
153};
154
155DECLARE_UVERBS_NAMED_METHOD(
156	UVERBS_METHOD_CQ_CREATE,
157	UVERBS_ATTR_IDR(UVERBS_ATTR_CREATE_CQ_HANDLE,
158			UVERBS_OBJECT_CQ,
159			UVERBS_ACCESS_NEW,
160			UA_MANDATORY),
161	UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_CQ_CQE,
162			   UVERBS_ATTR_TYPE(u32),
163			   UA_MANDATORY),
164	UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_CQ_USER_HANDLE,
165			   UVERBS_ATTR_TYPE(u64),
166			   UA_MANDATORY),
167	UVERBS_ATTR_FD(UVERBS_ATTR_CREATE_CQ_COMP_CHANNEL,
168		       UVERBS_OBJECT_COMP_CHANNEL,
169		       UVERBS_ACCESS_READ,
170		       UA_OPTIONAL),
171	UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_CQ_COMP_VECTOR,
172			   UVERBS_ATTR_TYPE(u32),
173			   UA_MANDATORY),
174	UVERBS_ATTR_FLAGS_IN(UVERBS_ATTR_CREATE_CQ_FLAGS,
175			     enum ib_uverbs_ex_create_cq_flags),
176	UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_CREATE_CQ_RESP_CQE,
177			    UVERBS_ATTR_TYPE(u32),
178			    UA_MANDATORY),
179	UVERBS_ATTR_FD(UVERBS_ATTR_CREATE_CQ_EVENT_FD,
180		       UVERBS_OBJECT_ASYNC_EVENT,
181		       UVERBS_ACCESS_READ,
182		       UA_OPTIONAL),
183	UVERBS_ATTR_UHW());
184
185static int UVERBS_HANDLER(UVERBS_METHOD_CQ_DESTROY)(
186	struct uverbs_attr_bundle *attrs)
187{
188	struct ib_uobject *uobj =
189		uverbs_attr_get_uobject(attrs, UVERBS_ATTR_DESTROY_CQ_HANDLE);
190	struct ib_ucq_object *obj =
191		container_of(uobj, struct ib_ucq_object, uevent.uobject);
192	struct ib_uverbs_destroy_cq_resp resp = {
193		.comp_events_reported = obj->comp_events_reported,
194		.async_events_reported = obj->uevent.events_reported
195	};
196
197	return uverbs_copy_to(attrs, UVERBS_ATTR_DESTROY_CQ_RESP, &resp,
198			      sizeof(resp));
199}
200
201DECLARE_UVERBS_NAMED_METHOD(
202	UVERBS_METHOD_CQ_DESTROY,
203	UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_CQ_HANDLE,
204			UVERBS_OBJECT_CQ,
205			UVERBS_ACCESS_DESTROY,
206			UA_MANDATORY),
207	UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_DESTROY_CQ_RESP,
208			    UVERBS_ATTR_TYPE(struct ib_uverbs_destroy_cq_resp),
209			    UA_MANDATORY));
210
211DECLARE_UVERBS_NAMED_OBJECT(
212	UVERBS_OBJECT_CQ,
213	UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_ucq_object), uverbs_free_cq),
214	&UVERBS_METHOD(UVERBS_METHOD_CQ_CREATE),
215	&UVERBS_METHOD(UVERBS_METHOD_CQ_DESTROY)
216);
217
218const struct uapi_definition uverbs_def_obj_cq[] = {
219	UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_CQ,
220				      UAPI_DEF_OBJ_NEEDS_FN(destroy_cq)),
221	{}
222};
223