| /* |
| * 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) |
| { |
| int ret; |
| struct ib_flow *flow = (struct ib_flow *)uobject->object; |
| struct ib_uflow_object *uflow = |
| container_of(uobject, struct ib_uflow_object, uobject); |
| |
| ret = ib_destroy_flow(flow); |
| if (!ret) |
| ib_uverbs_flow_resources_free(uflow->resources); |
| |
| return ret; |
| } |
| |
| 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_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; |
| }; |
| |
| int uverbs_destroy_def_handler(struct ib_device *ib_dev, |
| struct ib_uverbs_file *file, |
| struct uverbs_attr_bundle *attrs) |
| { |
| 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. |
| */ |
| const struct uverbs_attr_def uverbs_uhw_compat_in = |
| UVERBS_ATTR_PTR_IN_SZ(UVERBS_ATTR_UHW_IN, UVERBS_ATTR_SIZE(0, USHRT_MAX), |
| UA_FLAGS(UVERBS_ATTR_SPEC_F_MIN_SZ_OR_ZERO)); |
| const struct uverbs_attr_def uverbs_uhw_compat_out = |
| UVERBS_ATTR_PTR_OUT_SZ(UVERBS_ATTR_UHW_OUT, UVERBS_ATTR_SIZE(0, USHRT_MAX), |
| UA_FLAGS(UVERBS_ATTR_SPEC_F_MIN_SZ_OR_ZERO)); |
| |
| 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_ATTR_UHW_IN); |
| const struct uverbs_attr *uhw_out = |
| uverbs_attr_get(ctx, UVERBS_ATTR_UHW_OUT); |
| |
| if (!IS_ERR(uhw_in)) { |
| udata->inlen = uhw_in->ptr_attr.len; |
| if (uverbs_attr_ptr_is_inline(uhw_in)) |
| udata->inbuf = &uhw_in->uattr->data; |
| else |
| udata->inbuf = u64_to_user_ptr(uhw_in->ptr_attr.data); |
| } else { |
| udata->inbuf = NULL; |
| udata->inlen = 0; |
| } |
| |
| if (!IS_ERR(uhw_out)) { |
| udata->outbuf = u64_to_user_ptr(uhw_out->ptr_attr.data); |
| udata->outlen = uhw_out->ptr_attr.len; |
| } else { |
| udata->outbuf = NULL; |
| udata->outlen = 0; |
| } |
| } |
| |
| DECLARE_UVERBS_NAMED_OBJECT(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_NAMED_OBJECT(UVERBS_OBJECT_QP, |
| &UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uqp_object), 0, |
| uverbs_free_qp)); |
| |
| DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_MW, |
| &UVERBS_TYPE_ALLOC_IDR(0, uverbs_free_mw)); |
| |
| DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_SRQ, |
| &UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_usrq_object), 0, |
| uverbs_free_srq)); |
| |
| DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_AH, |
| &UVERBS_TYPE_ALLOC_IDR(0, uverbs_free_ah)); |
| |
| DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_FLOW, |
| &UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uflow_object), |
| 0, uverbs_free_flow)); |
| |
| DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_WQ, |
| &UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uwq_object), 0, |
| uverbs_free_wq)); |
| |
| DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_RWQ_IND_TBL, |
| &UVERBS_TYPE_ALLOC_IDR(0, uverbs_free_rwq_ind_tbl)); |
| |
| DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_XRCD, |
| &UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uxrcd_object), 0, |
| uverbs_free_xrcd)); |
| |
| DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_PD, |
| /* 2 is used in order to free the PD after MRs */ |
| &UVERBS_TYPE_ALLOC_IDR(2, uverbs_free_pd)); |
| |
| DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_DEVICE, NULL); |
| |
| static DECLARE_UVERBS_OBJECT_TREE(uverbs_default_objects, |
| &UVERBS_OBJECT(UVERBS_OBJECT_DEVICE), |
| &UVERBS_OBJECT(UVERBS_OBJECT_PD), |
| &UVERBS_OBJECT(UVERBS_OBJECT_MR), |
| &UVERBS_OBJECT(UVERBS_OBJECT_COMP_CHANNEL), |
| &UVERBS_OBJECT(UVERBS_OBJECT_CQ), |
| &UVERBS_OBJECT(UVERBS_OBJECT_QP), |
| &UVERBS_OBJECT(UVERBS_OBJECT_AH), |
| &UVERBS_OBJECT(UVERBS_OBJECT_MW), |
| &UVERBS_OBJECT(UVERBS_OBJECT_SRQ), |
| &UVERBS_OBJECT(UVERBS_OBJECT_FLOW), |
| &UVERBS_OBJECT(UVERBS_OBJECT_WQ), |
| &UVERBS_OBJECT(UVERBS_OBJECT_RWQ_IND_TBL), |
| &UVERBS_OBJECT(UVERBS_OBJECT_XRCD), |
| &UVERBS_OBJECT(UVERBS_OBJECT_FLOW_ACTION), |
| &UVERBS_OBJECT(UVERBS_OBJECT_DM), |
| &UVERBS_OBJECT(UVERBS_OBJECT_COUNTERS)); |
| |
| const struct uverbs_object_tree_def *uverbs_default_get_objects(void) |
| { |
| return &uverbs_default_objects; |
| } |
| EXPORT_SYMBOL_GPL(uverbs_default_get_objects); |