453 lines
14 KiB
C
Executable File
453 lines
14 KiB
C
Executable File
/*
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* Copyright (c) 2017, Mellanox Technologies inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <rdma/uverbs_std_types.h>
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#include <rdma/ib_user_verbs.h>
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#include <rdma/ib_verbs.h>
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#include <linux/bug.h>
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#include <linux/file.h>
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#include "rdma_core.h"
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#include "uverbs.h"
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static int uverbs_free_ah(struct ib_uobject *uobject,
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enum rdma_remove_reason why)
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{
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return rdma_destroy_ah((struct ib_ah *)uobject->object);
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}
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static int uverbs_free_flow(struct ib_uobject *uobject,
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enum rdma_remove_reason why)
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{
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return ib_destroy_flow((struct ib_flow *)uobject->object);
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}
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static int uverbs_free_mw(struct ib_uobject *uobject,
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enum rdma_remove_reason why)
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{
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return uverbs_dealloc_mw((struct ib_mw *)uobject->object);
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}
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static int uverbs_free_qp(struct ib_uobject *uobject,
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enum rdma_remove_reason why)
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{
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struct ib_qp *qp = uobject->object;
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struct ib_uqp_object *uqp =
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container_of(uobject, struct ib_uqp_object, uevent.uobject);
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int ret;
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if (why == RDMA_REMOVE_DESTROY) {
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if (!list_empty(&uqp->mcast_list))
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return -EBUSY;
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} else if (qp == qp->real_qp) {
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ib_uverbs_detach_umcast(qp, uqp);
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}
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ret = ib_destroy_qp(qp);
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if (ret && why == RDMA_REMOVE_DESTROY)
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return ret;
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if (uqp->uxrcd)
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atomic_dec(&uqp->uxrcd->refcnt);
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ib_uverbs_release_uevent(uobject->context->ufile, &uqp->uevent);
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return ret;
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}
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static int uverbs_free_rwq_ind_tbl(struct ib_uobject *uobject,
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enum rdma_remove_reason why)
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{
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struct ib_rwq_ind_table *rwq_ind_tbl = uobject->object;
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struct ib_wq **ind_tbl = rwq_ind_tbl->ind_tbl;
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int ret;
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ret = ib_destroy_rwq_ind_table(rwq_ind_tbl);
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if (!ret || why != RDMA_REMOVE_DESTROY)
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kfree(ind_tbl);
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return ret;
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}
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static int uverbs_free_wq(struct ib_uobject *uobject,
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enum rdma_remove_reason why)
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{
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struct ib_wq *wq = uobject->object;
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struct ib_uwq_object *uwq =
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container_of(uobject, struct ib_uwq_object, uevent.uobject);
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int ret;
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ret = ib_destroy_wq(wq);
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if (!ret || why != RDMA_REMOVE_DESTROY)
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ib_uverbs_release_uevent(uobject->context->ufile, &uwq->uevent);
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return ret;
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}
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static int uverbs_free_srq(struct ib_uobject *uobject,
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enum rdma_remove_reason why)
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{
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struct ib_srq *srq = uobject->object;
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struct ib_uevent_object *uevent =
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container_of(uobject, struct ib_uevent_object, uobject);
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enum ib_srq_type srq_type = srq->srq_type;
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int ret;
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ret = ib_destroy_srq(srq);
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if (ret && why == RDMA_REMOVE_DESTROY)
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return ret;
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if (srq_type == IB_SRQT_XRC) {
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struct ib_usrq_object *us =
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container_of(uevent, struct ib_usrq_object, uevent);
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atomic_dec(&us->uxrcd->refcnt);
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}
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ib_uverbs_release_uevent(uobject->context->ufile, uevent);
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return ret;
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}
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static int uverbs_free_cq(struct ib_uobject *uobject,
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enum rdma_remove_reason why)
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{
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struct ib_cq *cq = uobject->object;
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struct ib_uverbs_event_queue *ev_queue = cq->cq_context;
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struct ib_ucq_object *ucq =
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container_of(uobject, struct ib_ucq_object, uobject);
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int ret;
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ret = ib_destroy_cq(cq);
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if (!ret || why != RDMA_REMOVE_DESTROY)
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ib_uverbs_release_ucq(uobject->context->ufile, ev_queue ?
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container_of(ev_queue,
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struct ib_uverbs_completion_event_file,
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ev_queue) : NULL,
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ucq);
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return ret;
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}
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static int uverbs_free_mr(struct ib_uobject *uobject,
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enum rdma_remove_reason why)
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{
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return ib_dereg_mr((struct ib_mr *)uobject->object);
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}
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static int uverbs_free_xrcd(struct ib_uobject *uobject,
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enum rdma_remove_reason why)
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{
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struct ib_xrcd *xrcd = uobject->object;
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struct ib_uxrcd_object *uxrcd =
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container_of(uobject, struct ib_uxrcd_object, uobject);
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int ret;
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mutex_lock(&uobject->context->ufile->device->xrcd_tree_mutex);
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if (why == RDMA_REMOVE_DESTROY && atomic_read(&uxrcd->refcnt))
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ret = -EBUSY;
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else
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ret = ib_uverbs_dealloc_xrcd(uobject->context->ufile->device,
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xrcd, why);
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mutex_unlock(&uobject->context->ufile->device->xrcd_tree_mutex);
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return ret;
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}
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static int uverbs_free_pd(struct ib_uobject *uobject,
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enum rdma_remove_reason why)
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{
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struct ib_pd *pd = uobject->object;
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if (why == RDMA_REMOVE_DESTROY && atomic_read(&pd->usecnt))
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return -EBUSY;
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ib_dealloc_pd((struct ib_pd *)uobject->object);
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return 0;
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}
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static int uverbs_hot_unplug_completion_event_file(struct ib_uobject_file *uobj_file,
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enum rdma_remove_reason why)
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{
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struct ib_uverbs_completion_event_file *comp_event_file =
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container_of(uobj_file, struct ib_uverbs_completion_event_file,
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uobj_file);
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struct ib_uverbs_event_queue *event_queue = &comp_event_file->ev_queue;
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spin_lock_irq(&event_queue->lock);
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event_queue->is_closed = 1;
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spin_unlock_irq(&event_queue->lock);
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if (why == RDMA_REMOVE_DRIVER_REMOVE) {
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wake_up_interruptible(&event_queue->poll_wait);
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kill_fasync(&event_queue->async_queue, SIGIO, POLL_IN);
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}
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return 0;
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};
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/*
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* This spec is used in order to pass information to the hardware driver in a
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* legacy way. Every verb that could get driver specific data should get this
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* spec.
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*/
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static const struct uverbs_attr_def uverbs_uhw_compat_in =
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UVERBS_ATTR_PTR_IN_SZ(UVERBS_UHW_IN, 0, UA_FLAGS(UVERBS_ATTR_SPEC_F_MIN_SZ));
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static const struct uverbs_attr_def uverbs_uhw_compat_out =
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UVERBS_ATTR_PTR_OUT_SZ(UVERBS_UHW_OUT, 0, UA_FLAGS(UVERBS_ATTR_SPEC_F_MIN_SZ));
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static void create_udata(struct uverbs_attr_bundle *ctx,
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struct ib_udata *udata)
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{
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/*
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* This is for ease of conversion. The purpose is to convert all drivers
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* to use uverbs_attr_bundle instead of ib_udata.
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* Assume attr == 0 is input and attr == 1 is output.
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*/
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void __user *inbuf;
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size_t inbuf_len = 0;
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void __user *outbuf;
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size_t outbuf_len = 0;
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const struct uverbs_attr *uhw_in =
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uverbs_attr_get(ctx, UVERBS_UHW_IN);
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const struct uverbs_attr *uhw_out =
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uverbs_attr_get(ctx, UVERBS_UHW_OUT);
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if (!IS_ERR(uhw_in)) {
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inbuf = uhw_in->ptr_attr.ptr;
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inbuf_len = uhw_in->ptr_attr.len;
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}
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if (!IS_ERR(uhw_out)) {
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outbuf = uhw_out->ptr_attr.ptr;
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outbuf_len = uhw_out->ptr_attr.len;
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}
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INIT_UDATA_BUF_OR_NULL(udata, inbuf, outbuf, inbuf_len, outbuf_len);
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}
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static int uverbs_create_cq_handler(struct ib_device *ib_dev,
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struct ib_uverbs_file *file,
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struct uverbs_attr_bundle *attrs)
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{
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struct ib_ucontext *ucontext = file->ucontext;
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struct ib_ucq_object *obj;
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struct ib_udata uhw;
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int ret;
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u64 user_handle;
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struct ib_cq_init_attr attr = {};
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struct ib_cq *cq;
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struct ib_uverbs_completion_event_file *ev_file = NULL;
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const struct uverbs_attr *ev_file_attr;
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struct ib_uobject *ev_file_uobj;
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if (!(ib_dev->uverbs_cmd_mask & 1ULL << IB_USER_VERBS_CMD_CREATE_CQ))
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return -EOPNOTSUPP;
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ret = uverbs_copy_from(&attr.comp_vector, attrs, CREATE_CQ_COMP_VECTOR);
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if (!ret)
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ret = uverbs_copy_from(&attr.cqe, attrs, CREATE_CQ_CQE);
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if (!ret)
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ret = uverbs_copy_from(&user_handle, attrs, CREATE_CQ_USER_HANDLE);
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if (ret)
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return ret;
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/* Optional param, if it doesn't exist, we get -ENOENT and skip it */
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if (uverbs_copy_from(&attr.flags, attrs, CREATE_CQ_FLAGS) == -EFAULT)
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return -EFAULT;
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ev_file_attr = uverbs_attr_get(attrs, CREATE_CQ_COMP_CHANNEL);
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if (!IS_ERR(ev_file_attr)) {
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ev_file_uobj = ev_file_attr->obj_attr.uobject;
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ev_file = container_of(ev_file_uobj,
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struct ib_uverbs_completion_event_file,
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uobj_file.uobj);
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uverbs_uobject_get(ev_file_uobj);
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}
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if (attr.comp_vector >= ucontext->ufile->device->num_comp_vectors) {
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ret = -EINVAL;
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goto err_event_file;
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}
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obj = container_of(uverbs_attr_get(attrs, CREATE_CQ_HANDLE)->obj_attr.uobject,
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typeof(*obj), uobject);
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obj->uverbs_file = ucontext->ufile;
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obj->comp_events_reported = 0;
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obj->async_events_reported = 0;
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INIT_LIST_HEAD(&obj->comp_list);
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INIT_LIST_HEAD(&obj->async_list);
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/* Temporary, only until drivers get the new uverbs_attr_bundle */
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create_udata(attrs, &uhw);
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cq = ib_dev->create_cq(ib_dev, &attr, ucontext, &uhw);
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if (IS_ERR(cq)) {
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ret = PTR_ERR(cq);
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goto err_event_file;
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}
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cq->device = ib_dev;
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cq->uobject = &obj->uobject;
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cq->comp_handler = ib_uverbs_comp_handler;
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cq->event_handler = ib_uverbs_cq_event_handler;
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cq->cq_context = ev_file ? &ev_file->ev_queue : NULL;
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obj->uobject.object = cq;
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obj->uobject.user_handle = user_handle;
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atomic_set(&cq->usecnt, 0);
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ret = uverbs_copy_to(attrs, CREATE_CQ_RESP_CQE, &cq->cqe);
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if (ret)
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goto err_cq;
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return 0;
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err_cq:
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ib_destroy_cq(cq);
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err_event_file:
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if (ev_file)
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uverbs_uobject_put(ev_file_uobj);
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return ret;
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};
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static DECLARE_UVERBS_METHOD(
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uverbs_method_cq_create, UVERBS_CQ_CREATE, uverbs_create_cq_handler,
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&UVERBS_ATTR_IDR(CREATE_CQ_HANDLE, UVERBS_OBJECT_CQ, UVERBS_ACCESS_NEW,
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UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)),
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&UVERBS_ATTR_PTR_IN(CREATE_CQ_CQE, u32,
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UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)),
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&UVERBS_ATTR_PTR_IN(CREATE_CQ_USER_HANDLE, u64,
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UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)),
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&UVERBS_ATTR_FD(CREATE_CQ_COMP_CHANNEL, UVERBS_OBJECT_COMP_CHANNEL,
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UVERBS_ACCESS_READ),
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&UVERBS_ATTR_PTR_IN(CREATE_CQ_COMP_VECTOR, u32,
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UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)),
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&UVERBS_ATTR_PTR_IN(CREATE_CQ_FLAGS, u32),
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&UVERBS_ATTR_PTR_OUT(CREATE_CQ_RESP_CQE, u32,
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UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)),
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&uverbs_uhw_compat_in, &uverbs_uhw_compat_out);
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static int uverbs_destroy_cq_handler(struct ib_device *ib_dev,
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struct ib_uverbs_file *file,
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struct uverbs_attr_bundle *attrs)
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{
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struct ib_uverbs_destroy_cq_resp resp;
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struct ib_uobject *uobj =
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uverbs_attr_get(attrs, DESTROY_CQ_HANDLE)->obj_attr.uobject;
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struct ib_ucq_object *obj = container_of(uobj, struct ib_ucq_object,
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uobject);
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int ret;
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if (!(ib_dev->uverbs_cmd_mask & 1ULL << IB_USER_VERBS_CMD_DESTROY_CQ))
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return -EOPNOTSUPP;
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ret = rdma_explicit_destroy(uobj);
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if (ret)
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return ret;
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resp.comp_events_reported = obj->comp_events_reported;
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resp.async_events_reported = obj->async_events_reported;
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return uverbs_copy_to(attrs, DESTROY_CQ_RESP, &resp);
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}
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static DECLARE_UVERBS_METHOD(
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uverbs_method_cq_destroy, UVERBS_CQ_DESTROY, uverbs_destroy_cq_handler,
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&UVERBS_ATTR_IDR(DESTROY_CQ_HANDLE, UVERBS_OBJECT_CQ,
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UVERBS_ACCESS_DESTROY,
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UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)),
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&UVERBS_ATTR_PTR_OUT(DESTROY_CQ_RESP, struct ib_uverbs_destroy_cq_resp,
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UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)));
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DECLARE_UVERBS_OBJECT(uverbs_object_comp_channel,
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UVERBS_OBJECT_COMP_CHANNEL,
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&UVERBS_TYPE_ALLOC_FD(0,
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sizeof(struct ib_uverbs_completion_event_file),
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uverbs_hot_unplug_completion_event_file,
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&uverbs_event_fops,
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"[infinibandevent]", O_RDONLY));
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DECLARE_UVERBS_OBJECT(uverbs_object_cq, UVERBS_OBJECT_CQ,
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&UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_ucq_object), 0,
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uverbs_free_cq),
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&uverbs_method_cq_create,
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&uverbs_method_cq_destroy);
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DECLARE_UVERBS_OBJECT(uverbs_object_qp, UVERBS_OBJECT_QP,
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&UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uqp_object), 0,
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uverbs_free_qp));
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DECLARE_UVERBS_OBJECT(uverbs_object_mw, UVERBS_OBJECT_MW,
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&UVERBS_TYPE_ALLOC_IDR(0, uverbs_free_mw));
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DECLARE_UVERBS_OBJECT(uverbs_object_mr, UVERBS_OBJECT_MR,
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/* 1 is used in order to free the MR after all the MWs */
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&UVERBS_TYPE_ALLOC_IDR(1, uverbs_free_mr));
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DECLARE_UVERBS_OBJECT(uverbs_object_srq, UVERBS_OBJECT_SRQ,
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&UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_usrq_object), 0,
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uverbs_free_srq));
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DECLARE_UVERBS_OBJECT(uverbs_object_ah, UVERBS_OBJECT_AH,
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&UVERBS_TYPE_ALLOC_IDR(0, uverbs_free_ah));
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DECLARE_UVERBS_OBJECT(uverbs_object_flow, UVERBS_OBJECT_FLOW,
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&UVERBS_TYPE_ALLOC_IDR(0, uverbs_free_flow));
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DECLARE_UVERBS_OBJECT(uverbs_object_wq, UVERBS_OBJECT_WQ,
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&UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uwq_object), 0,
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uverbs_free_wq));
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DECLARE_UVERBS_OBJECT(uverbs_object_rwq_ind_table,
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UVERBS_OBJECT_RWQ_IND_TBL,
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&UVERBS_TYPE_ALLOC_IDR(0, uverbs_free_rwq_ind_tbl));
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DECLARE_UVERBS_OBJECT(uverbs_object_xrcd, UVERBS_OBJECT_XRCD,
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&UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uxrcd_object), 0,
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uverbs_free_xrcd));
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DECLARE_UVERBS_OBJECT(uverbs_object_pd, UVERBS_OBJECT_PD,
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/* 2 is used in order to free the PD after MRs */
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&UVERBS_TYPE_ALLOC_IDR(2, uverbs_free_pd));
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DECLARE_UVERBS_OBJECT(uverbs_object_device, UVERBS_OBJECT_DEVICE, NULL);
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DECLARE_UVERBS_OBJECT_TREE(uverbs_default_objects,
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&uverbs_object_device,
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&uverbs_object_pd,
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&uverbs_object_mr,
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&uverbs_object_comp_channel,
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&uverbs_object_cq,
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&uverbs_object_qp,
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&uverbs_object_ah,
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&uverbs_object_mw,
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&uverbs_object_srq,
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&uverbs_object_flow,
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&uverbs_object_wq,
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&uverbs_object_rwq_ind_table,
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&uverbs_object_xrcd);
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