| /* |
| * 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/ib_user_verbs.h> |
| #include <rdma/ib_verbs.h> |
| #include <linux/bug.h> |
| #include <linux/file.h> |
| #include <rdma/restrack.h> |
| #include "rdma_core.h" |
| #include "uverbs.h" |
| |
| static int uverbs_free_ah(struct ib_uobject *uobject, |
| enum rdma_remove_reason why) |
| { |
| return rdma_destroy_ah((struct ib_ah *)uobject->object); |
| } |
| |
| static int uverbs_free_flow(struct ib_uobject *uobject, |
| enum rdma_remove_reason why) |
| { |
| return ib_destroy_flow((struct ib_flow *)uobject->object); |
| } |
| |
| static int uverbs_free_mw(struct ib_uobject *uobject, |
| enum rdma_remove_reason why) |
| { |
| return uverbs_dealloc_mw((struct ib_mw *)uobject->object); |
| } |
| |
| static int uverbs_free_qp(struct ib_uobject *uobject, |
| enum rdma_remove_reason why) |
| { |
| struct ib_qp *qp = uobject->object; |
| struct ib_uqp_object *uqp = |
| container_of(uobject, struct ib_uqp_object, uevent.uobject); |
| int ret; |
| |
| if (why == RDMA_REMOVE_DESTROY) { |
| if (!list_empty(&uqp->mcast_list)) |
| return -EBUSY; |
| } else if (qp == qp->real_qp) { |
| ib_uverbs_detach_umcast(qp, uqp); |
| } |
| |
| ret = ib_destroy_qp(qp); |
| if (ret && why == RDMA_REMOVE_DESTROY) |
| return ret; |
| |
| if (uqp->uxrcd) |
| atomic_dec(&uqp->uxrcd->refcnt); |
| |
| ib_uverbs_release_uevent(uobject->context->ufile, &uqp->uevent); |
| return ret; |
| } |
| |
| static int uverbs_free_rwq_ind_tbl(struct ib_uobject *uobject, |
| enum rdma_remove_reason why) |
| { |
| struct ib_rwq_ind_table *rwq_ind_tbl = uobject->object; |
| struct ib_wq **ind_tbl = rwq_ind_tbl->ind_tbl; |
| int ret; |
| |
| ret = ib_destroy_rwq_ind_table(rwq_ind_tbl); |
| if (!ret || why != RDMA_REMOVE_DESTROY) |
| kfree(ind_tbl); |
| return ret; |
| } |
| |
| static int uverbs_free_wq(struct ib_uobject *uobject, |
| enum rdma_remove_reason why) |
| { |
| struct ib_wq *wq = uobject->object; |
| struct ib_uwq_object *uwq = |
| container_of(uobject, struct ib_uwq_object, uevent.uobject); |
| int ret; |
| |
| ret = ib_destroy_wq(wq); |
| if (!ret || why != RDMA_REMOVE_DESTROY) |
| ib_uverbs_release_uevent(uobject->context->ufile, &uwq->uevent); |
| return ret; |
| } |
| |
| static int uverbs_free_srq(struct ib_uobject *uobject, |
| enum rdma_remove_reason why) |
| { |
| struct ib_srq *srq = uobject->object; |
| struct ib_uevent_object *uevent = |
| container_of(uobject, struct ib_uevent_object, uobject); |
| enum ib_srq_type srq_type = srq->srq_type; |
| int ret; |
| |
| ret = ib_destroy_srq(srq); |
| |
| if (ret && why == RDMA_REMOVE_DESTROY) |
| return ret; |
| |
| if (srq_type == IB_SRQT_XRC) { |
| struct ib_usrq_object *us = |
| container_of(uevent, struct ib_usrq_object, uevent); |
| |
| atomic_dec(&us->uxrcd->refcnt); |
| } |
| |
| ib_uverbs_release_uevent(uobject->context->ufile, uevent); |
| return ret; |
| } |
| |
| static int uverbs_free_cq(struct ib_uobject *uobject, |
| enum rdma_remove_reason why) |
| { |
| 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, uobject); |
| int ret; |
| |
| ret = ib_destroy_cq(cq); |
| if (!ret || why != RDMA_REMOVE_DESTROY) |
| ib_uverbs_release_ucq(uobject->context->ufile, ev_queue ? |
| container_of(ev_queue, |
| struct ib_uverbs_completion_event_file, |
| ev_queue) : NULL, |
| ucq); |
| return ret; |
| } |
| |
| static int uverbs_free_mr(struct ib_uobject *uobject, |
| enum rdma_remove_reason why) |
| { |
| return ib_dereg_mr((struct ib_mr *)uobject->object); |
| } |
| |
| static int uverbs_free_xrcd(struct ib_uobject *uobject, |
| enum rdma_remove_reason why) |
| { |
| struct ib_xrcd *xrcd = uobject->object; |
| struct ib_uxrcd_object *uxrcd = |
| container_of(uobject, struct ib_uxrcd_object, uobject); |
| int ret; |
| |
| mutex_lock(&uobject->context->ufile->device->xrcd_tree_mutex); |
| if (why == RDMA_REMOVE_DESTROY && atomic_read(&uxrcd->refcnt)) |
| ret = -EBUSY; |
| else |
| ret = ib_uverbs_dealloc_xrcd(uobject->context->ufile->device, |
| xrcd, why); |
| mutex_unlock(&uobject->context->ufile->device->xrcd_tree_mutex); |
| |
| return ret; |
| } |
| |
| static int uverbs_free_pd(struct ib_uobject *uobject, |
| enum rdma_remove_reason why) |
| { |
| struct ib_pd *pd = uobject->object; |
| |
| if (why == RDMA_REMOVE_DESTROY && atomic_read(&pd->usecnt)) |
| return -EBUSY; |
| |
| ib_dealloc_pd((struct ib_pd *)uobject->object); |
| return 0; |
| } |
| |
| static int uverbs_hot_unplug_completion_event_file(struct ib_uobject_file *uobj_file, |
| enum rdma_remove_reason why) |
| { |
| struct ib_uverbs_completion_event_file *comp_event_file = |
| container_of(uobj_file, struct ib_uverbs_completion_event_file, |
| uobj_file); |
| struct ib_uverbs_event_queue *event_queue = &comp_event_file->ev_queue; |
| |
| spin_lock_irq(&event_queue->lock); |
| event_queue->is_closed = 1; |
| spin_unlock_irq(&event_queue->lock); |
| |
| if (why == RDMA_REMOVE_DRIVER_REMOVE) { |
| wake_up_interruptible(&event_queue->poll_wait); |
| kill_fasync(&event_queue->async_queue, SIGIO, POLL_IN); |
| } |
| return 0; |
| }; |
| |
| /* |
| * This spec is used in order to pass information to the hardware driver in a |
| * legacy way. Every verb that could get driver specific data should get this |
| * spec. |
| */ |
| static const struct uverbs_attr_def uverbs_uhw_compat_in = |
| UVERBS_ATTR_PTR_IN_SZ(UVERBS_UHW_IN, 0, UA_FLAGS(UVERBS_ATTR_SPEC_F_MIN_SZ)); |
| static const struct uverbs_attr_def uverbs_uhw_compat_out = |
| UVERBS_ATTR_PTR_OUT_SZ(UVERBS_UHW_OUT, 0, UA_FLAGS(UVERBS_ATTR_SPEC_F_MIN_SZ)); |
| |
| static void create_udata(struct uverbs_attr_bundle *ctx, |
| struct ib_udata *udata) |
| { |
| /* |
| * This is for ease of conversion. The purpose is to convert all drivers |
| * to use uverbs_attr_bundle instead of ib_udata. |
| * Assume attr == 0 is input and attr == 1 is output. |
| */ |
| const struct uverbs_attr *uhw_in = |
| uverbs_attr_get(ctx, UVERBS_UHW_IN); |
| const struct uverbs_attr *uhw_out = |
| uverbs_attr_get(ctx, UVERBS_UHW_OUT); |
| |
| if (!IS_ERR(uhw_in)) { |
| udata->inbuf = uhw_in->ptr_attr.ptr; |
| udata->inlen = uhw_in->ptr_attr.len; |
| } else { |
| udata->inbuf = NULL; |
| udata->inlen = 0; |
| } |
| |
| if (!IS_ERR(uhw_out)) { |
| udata->outbuf = uhw_out->ptr_attr.ptr; |
| udata->outlen = uhw_out->ptr_attr.len; |
| } else { |
| udata->outbuf = NULL; |
| udata->outlen = 0; |
| } |
| } |
| |
| static int uverbs_create_cq_handler(struct ib_device *ib_dev, |
| struct ib_uverbs_file *file, |
| struct uverbs_attr_bundle *attrs) |
| { |
| struct ib_ucontext *ucontext = file->ucontext; |
| struct ib_ucq_object *obj; |
| struct ib_udata uhw; |
| int ret; |
| u64 user_handle; |
| struct ib_cq_init_attr attr = {}; |
| struct ib_cq *cq; |
| struct ib_uverbs_completion_event_file *ev_file = NULL; |
| const struct uverbs_attr *ev_file_attr; |
| struct ib_uobject *ev_file_uobj; |
| |
| if (!(ib_dev->uverbs_cmd_mask & 1ULL << IB_USER_VERBS_CMD_CREATE_CQ)) |
| return -EOPNOTSUPP; |
| |
| ret = uverbs_copy_from(&attr.comp_vector, attrs, CREATE_CQ_COMP_VECTOR); |
| if (!ret) |
| ret = uverbs_copy_from(&attr.cqe, attrs, CREATE_CQ_CQE); |
| if (!ret) |
| ret = uverbs_copy_from(&user_handle, attrs, CREATE_CQ_USER_HANDLE); |
| if (ret) |
| return ret; |
| |
| /* Optional param, if it doesn't exist, we get -ENOENT and skip it */ |
| if (uverbs_copy_from(&attr.flags, attrs, CREATE_CQ_FLAGS) == -EFAULT) |
| return -EFAULT; |
| |
| ev_file_attr = uverbs_attr_get(attrs, CREATE_CQ_COMP_CHANNEL); |
| if (!IS_ERR(ev_file_attr)) { |
| ev_file_uobj = ev_file_attr->obj_attr.uobject; |
| |
| ev_file = container_of(ev_file_uobj, |
| struct ib_uverbs_completion_event_file, |
| uobj_file.uobj); |
| uverbs_uobject_get(ev_file_uobj); |
| } |
| |
| if (attr.comp_vector >= ucontext->ufile->device->num_comp_vectors) { |
| ret = -EINVAL; |
| goto err_event_file; |
| } |
| |
| obj = container_of(uverbs_attr_get(attrs, CREATE_CQ_HANDLE)->obj_attr.uobject, |
| typeof(*obj), uobject); |
| obj->uverbs_file = ucontext->ufile; |
| obj->comp_events_reported = 0; |
| obj->async_events_reported = 0; |
| INIT_LIST_HEAD(&obj->comp_list); |
| INIT_LIST_HEAD(&obj->async_list); |
| |
| /* Temporary, only until drivers get the new uverbs_attr_bundle */ |
| create_udata(attrs, &uhw); |
| |
| cq = ib_dev->create_cq(ib_dev, &attr, ucontext, &uhw); |
| if (IS_ERR(cq)) { |
| ret = PTR_ERR(cq); |
| goto err_event_file; |
| } |
| |
| cq->device = ib_dev; |
| cq->uobject = &obj->uobject; |
| 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; |
| obj->uobject.object = cq; |
| obj->uobject.user_handle = user_handle; |
| atomic_set(&cq->usecnt, 0); |
| cq->res.type = RDMA_RESTRACK_CQ; |
| rdma_restrack_add(&cq->res); |
| |
| ret = uverbs_copy_to(attrs, CREATE_CQ_RESP_CQE, &cq->cqe); |
| if (ret) |
| goto err_cq; |
| |
| return 0; |
| err_cq: |
| ib_destroy_cq(cq); |
| |
| err_event_file: |
| if (ev_file) |
| uverbs_uobject_put(ev_file_uobj); |
| return ret; |
| }; |
| |
| static DECLARE_UVERBS_METHOD( |
| uverbs_method_cq_create, UVERBS_CQ_CREATE, uverbs_create_cq_handler, |
| &UVERBS_ATTR_IDR(CREATE_CQ_HANDLE, UVERBS_OBJECT_CQ, UVERBS_ACCESS_NEW, |
| UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), |
| &UVERBS_ATTR_PTR_IN(CREATE_CQ_CQE, u32, |
| UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), |
| &UVERBS_ATTR_PTR_IN(CREATE_CQ_USER_HANDLE, u64, |
| UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), |
| &UVERBS_ATTR_FD(CREATE_CQ_COMP_CHANNEL, UVERBS_OBJECT_COMP_CHANNEL, |
| UVERBS_ACCESS_READ), |
| &UVERBS_ATTR_PTR_IN(CREATE_CQ_COMP_VECTOR, u32, |
| UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), |
| &UVERBS_ATTR_PTR_IN(CREATE_CQ_FLAGS, u32), |
| &UVERBS_ATTR_PTR_OUT(CREATE_CQ_RESP_CQE, u32, |
| UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), |
| &uverbs_uhw_compat_in, &uverbs_uhw_compat_out); |
| |
| static int uverbs_destroy_cq_handler(struct ib_device *ib_dev, |
| struct ib_uverbs_file *file, |
| struct uverbs_attr_bundle *attrs) |
| { |
| struct ib_uverbs_destroy_cq_resp resp; |
| struct ib_uobject *uobj = |
| uverbs_attr_get(attrs, DESTROY_CQ_HANDLE)->obj_attr.uobject; |
| struct ib_ucq_object *obj = container_of(uobj, struct ib_ucq_object, |
| uobject); |
| int ret; |
| |
| if (!(ib_dev->uverbs_cmd_mask & 1ULL << IB_USER_VERBS_CMD_DESTROY_CQ)) |
| return -EOPNOTSUPP; |
| |
| ret = rdma_explicit_destroy(uobj); |
| if (ret) |
| return ret; |
| |
| resp.comp_events_reported = obj->comp_events_reported; |
| resp.async_events_reported = obj->async_events_reported; |
| |
| return uverbs_copy_to(attrs, DESTROY_CQ_RESP, &resp); |
| } |
| |
| static DECLARE_UVERBS_METHOD( |
| uverbs_method_cq_destroy, UVERBS_CQ_DESTROY, uverbs_destroy_cq_handler, |
| &UVERBS_ATTR_IDR(DESTROY_CQ_HANDLE, UVERBS_OBJECT_CQ, |
| UVERBS_ACCESS_DESTROY, |
| UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), |
| &UVERBS_ATTR_PTR_OUT(DESTROY_CQ_RESP, struct ib_uverbs_destroy_cq_resp, |
| UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY))); |
| |
| DECLARE_UVERBS_OBJECT(uverbs_object_comp_channel, |
| UVERBS_OBJECT_COMP_CHANNEL, |
| &UVERBS_TYPE_ALLOC_FD(0, |
| sizeof(struct ib_uverbs_completion_event_file), |
| uverbs_hot_unplug_completion_event_file, |
| &uverbs_event_fops, |
| "[infinibandevent]", O_RDONLY)); |
| |
| DECLARE_UVERBS_OBJECT(uverbs_object_cq, UVERBS_OBJECT_CQ, |
| &UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_ucq_object), 0, |
| uverbs_free_cq), |
| &uverbs_method_cq_create, |
| &uverbs_method_cq_destroy); |
| |
| DECLARE_UVERBS_OBJECT(uverbs_object_qp, UVERBS_OBJECT_QP, |
| &UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uqp_object), 0, |
| uverbs_free_qp)); |
| |
| DECLARE_UVERBS_OBJECT(uverbs_object_mw, UVERBS_OBJECT_MW, |
| &UVERBS_TYPE_ALLOC_IDR(0, uverbs_free_mw)); |
| |
| DECLARE_UVERBS_OBJECT(uverbs_object_mr, UVERBS_OBJECT_MR, |
| /* 1 is used in order to free the MR after all the MWs */ |
| &UVERBS_TYPE_ALLOC_IDR(1, uverbs_free_mr)); |
| |
| DECLARE_UVERBS_OBJECT(uverbs_object_srq, UVERBS_OBJECT_SRQ, |
| &UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_usrq_object), 0, |
| uverbs_free_srq)); |
| |
| DECLARE_UVERBS_OBJECT(uverbs_object_ah, UVERBS_OBJECT_AH, |
| &UVERBS_TYPE_ALLOC_IDR(0, uverbs_free_ah)); |
| |
| DECLARE_UVERBS_OBJECT(uverbs_object_flow, UVERBS_OBJECT_FLOW, |
| &UVERBS_TYPE_ALLOC_IDR(0, uverbs_free_flow)); |
| |
| DECLARE_UVERBS_OBJECT(uverbs_object_wq, UVERBS_OBJECT_WQ, |
| &UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uwq_object), 0, |
| uverbs_free_wq)); |
| |
| DECLARE_UVERBS_OBJECT(uverbs_object_rwq_ind_table, |
| UVERBS_OBJECT_RWQ_IND_TBL, |
| &UVERBS_TYPE_ALLOC_IDR(0, uverbs_free_rwq_ind_tbl)); |
| |
| DECLARE_UVERBS_OBJECT(uverbs_object_xrcd, UVERBS_OBJECT_XRCD, |
| &UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uxrcd_object), 0, |
| uverbs_free_xrcd)); |
| |
| DECLARE_UVERBS_OBJECT(uverbs_object_pd, UVERBS_OBJECT_PD, |
| /* 2 is used in order to free the PD after MRs */ |
| &UVERBS_TYPE_ALLOC_IDR(2, uverbs_free_pd)); |
| |
| DECLARE_UVERBS_OBJECT(uverbs_object_device, UVERBS_OBJECT_DEVICE, NULL); |
| |
| DECLARE_UVERBS_OBJECT_TREE(uverbs_default_objects, |
| &uverbs_object_device, |
| &uverbs_object_pd, |
| &uverbs_object_mr, |
| &uverbs_object_comp_channel, |
| &uverbs_object_cq, |
| &uverbs_object_qp, |
| &uverbs_object_ah, |
| &uverbs_object_mw, |
| &uverbs_object_srq, |
| &uverbs_object_flow, |
| &uverbs_object_wq, |
| &uverbs_object_rwq_ind_table, |
| &uverbs_object_xrcd); |