diff options
Diffstat (limited to 'drivers/infiniband/core/uverbs_std_types_cq.c')
| -rw-r--r-- | drivers/infiniband/core/uverbs_std_types_cq.c | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/drivers/infiniband/core/uverbs_std_types_cq.c b/drivers/infiniband/core/uverbs_std_types_cq.c new file mode 100644 index 000000000..370ad7c83 --- /dev/null +++ b/drivers/infiniband/core/uverbs_std_types_cq.c @@ -0,0 +1,222 @@ +/* + * 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->driver_udata); + 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)), + {} +}; |