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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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79d8190759
Only print debug messages when debug_level is set. Eliminate NULL checks prior to calling kfree. Signed-off-by: Hal Rosenstock <halr@voltaire.com> Signed-off-by: Libor Michalek <libor@topspin.com>
1388 lines
32 KiB
C
1388 lines
32 KiB
C
/*
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* Copyright (c) 2005 Topspin Communications. 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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* $Id: ucm.c 2594 2005-06-13 19:46:02Z libor $
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*/
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#include <linux/init.h>
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#include <linux/fs.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/poll.h>
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#include <linux/file.h>
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#include <linux/mount.h>
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#include <linux/cdev.h>
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#include <asm/uaccess.h>
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#include "ucm.h"
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MODULE_AUTHOR("Libor Michalek");
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MODULE_DESCRIPTION("InfiniBand userspace Connection Manager access");
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MODULE_LICENSE("Dual BSD/GPL");
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static int ucm_debug_level;
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module_param_named(debug_level, ucm_debug_level, int, 0644);
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MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0");
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enum {
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IB_UCM_MAJOR = 231,
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IB_UCM_MINOR = 255
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};
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#define IB_UCM_DEV MKDEV(IB_UCM_MAJOR, IB_UCM_MINOR)
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#define PFX "UCM: "
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#define ucm_dbg(format, arg...) \
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do { \
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if (ucm_debug_level > 0) \
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printk(KERN_DEBUG PFX format, ## arg); \
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} while (0)
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static struct semaphore ctx_id_mutex;
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static struct idr ctx_id_table;
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static int ctx_id_rover = 0;
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static struct ib_ucm_context *ib_ucm_ctx_get(int id)
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{
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struct ib_ucm_context *ctx;
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down(&ctx_id_mutex);
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ctx = idr_find(&ctx_id_table, id);
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if (ctx)
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ctx->ref++;
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up(&ctx_id_mutex);
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return ctx;
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}
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static void ib_ucm_ctx_put(struct ib_ucm_context *ctx)
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{
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struct ib_ucm_event *uevent;
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down(&ctx_id_mutex);
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ctx->ref--;
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if (!ctx->ref)
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idr_remove(&ctx_id_table, ctx->id);
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up(&ctx_id_mutex);
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if (ctx->ref)
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return;
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down(&ctx->file->mutex);
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list_del(&ctx->file_list);
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while (!list_empty(&ctx->events)) {
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uevent = list_entry(ctx->events.next,
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struct ib_ucm_event, ctx_list);
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list_del(&uevent->file_list);
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list_del(&uevent->ctx_list);
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/* clear incoming connections. */
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if (uevent->cm_id)
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ib_destroy_cm_id(uevent->cm_id);
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kfree(uevent);
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}
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up(&ctx->file->mutex);
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ucm_dbg("Destroyed CM ID <%d>\n", ctx->id);
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ib_destroy_cm_id(ctx->cm_id);
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kfree(ctx);
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}
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static struct ib_ucm_context *ib_ucm_ctx_alloc(struct ib_ucm_file *file)
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{
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struct ib_ucm_context *ctx;
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int result;
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ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
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if (!ctx)
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return NULL;
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ctx->ref = 1; /* user reference */
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ctx->file = file;
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INIT_LIST_HEAD(&ctx->events);
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init_MUTEX(&ctx->mutex);
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list_add_tail(&ctx->file_list, &file->ctxs);
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ctx_id_rover = (ctx_id_rover + 1) & INT_MAX;
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retry:
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result = idr_pre_get(&ctx_id_table, GFP_KERNEL);
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if (!result)
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goto error;
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down(&ctx_id_mutex);
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result = idr_get_new_above(&ctx_id_table, ctx, ctx_id_rover, &ctx->id);
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up(&ctx_id_mutex);
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if (result == -EAGAIN)
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goto retry;
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if (result)
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goto error;
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ucm_dbg("Allocated CM ID <%d>\n", ctx->id);
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return ctx;
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error:
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list_del(&ctx->file_list);
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kfree(ctx);
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return NULL;
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}
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/*
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* Event portion of the API, handle CM events
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* and allow event polling.
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*/
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static void ib_ucm_event_path_get(struct ib_ucm_path_rec *upath,
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struct ib_sa_path_rec *kpath)
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{
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if (!kpath || !upath)
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return;
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memcpy(upath->dgid, kpath->dgid.raw, sizeof(union ib_gid));
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memcpy(upath->sgid, kpath->sgid.raw, sizeof(union ib_gid));
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upath->dlid = kpath->dlid;
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upath->slid = kpath->slid;
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upath->raw_traffic = kpath->raw_traffic;
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upath->flow_label = kpath->flow_label;
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upath->hop_limit = kpath->hop_limit;
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upath->traffic_class = kpath->traffic_class;
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upath->reversible = kpath->reversible;
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upath->numb_path = kpath->numb_path;
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upath->pkey = kpath->pkey;
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upath->sl = kpath->sl;
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upath->mtu_selector = kpath->mtu_selector;
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upath->mtu = kpath->mtu;
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upath->rate_selector = kpath->rate_selector;
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upath->rate = kpath->rate;
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upath->packet_life_time = kpath->packet_life_time;
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upath->preference = kpath->preference;
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upath->packet_life_time_selector =
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kpath->packet_life_time_selector;
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}
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static void ib_ucm_event_req_get(struct ib_ucm_req_event_resp *ureq,
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struct ib_cm_req_event_param *kreq)
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{
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ureq->listen_id = (long)kreq->listen_id->context;
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ureq->remote_ca_guid = kreq->remote_ca_guid;
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ureq->remote_qkey = kreq->remote_qkey;
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ureq->remote_qpn = kreq->remote_qpn;
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ureq->qp_type = kreq->qp_type;
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ureq->starting_psn = kreq->starting_psn;
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ureq->responder_resources = kreq->responder_resources;
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ureq->initiator_depth = kreq->initiator_depth;
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ureq->local_cm_response_timeout = kreq->local_cm_response_timeout;
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ureq->flow_control = kreq->flow_control;
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ureq->remote_cm_response_timeout = kreq->remote_cm_response_timeout;
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ureq->retry_count = kreq->retry_count;
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ureq->rnr_retry_count = kreq->rnr_retry_count;
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ureq->srq = kreq->srq;
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ib_ucm_event_path_get(&ureq->primary_path, kreq->primary_path);
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ib_ucm_event_path_get(&ureq->alternate_path, kreq->alternate_path);
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}
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static void ib_ucm_event_rep_get(struct ib_ucm_rep_event_resp *urep,
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struct ib_cm_rep_event_param *krep)
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{
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urep->remote_ca_guid = krep->remote_ca_guid;
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urep->remote_qkey = krep->remote_qkey;
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urep->remote_qpn = krep->remote_qpn;
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urep->starting_psn = krep->starting_psn;
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urep->responder_resources = krep->responder_resources;
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urep->initiator_depth = krep->initiator_depth;
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urep->target_ack_delay = krep->target_ack_delay;
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urep->failover_accepted = krep->failover_accepted;
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urep->flow_control = krep->flow_control;
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urep->rnr_retry_count = krep->rnr_retry_count;
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urep->srq = krep->srq;
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}
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static void ib_ucm_event_rej_get(struct ib_ucm_rej_event_resp *urej,
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struct ib_cm_rej_event_param *krej)
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{
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urej->reason = krej->reason;
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}
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static void ib_ucm_event_mra_get(struct ib_ucm_mra_event_resp *umra,
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struct ib_cm_mra_event_param *kmra)
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{
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umra->timeout = kmra->service_timeout;
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}
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static void ib_ucm_event_lap_get(struct ib_ucm_lap_event_resp *ulap,
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struct ib_cm_lap_event_param *klap)
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{
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ib_ucm_event_path_get(&ulap->path, klap->alternate_path);
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}
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static void ib_ucm_event_apr_get(struct ib_ucm_apr_event_resp *uapr,
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struct ib_cm_apr_event_param *kapr)
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{
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uapr->status = kapr->ap_status;
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}
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static void ib_ucm_event_sidr_req_get(struct ib_ucm_sidr_req_event_resp *ureq,
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struct ib_cm_sidr_req_event_param *kreq)
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{
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ureq->listen_id = (long)kreq->listen_id->context;
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ureq->pkey = kreq->pkey;
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}
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static void ib_ucm_event_sidr_rep_get(struct ib_ucm_sidr_rep_event_resp *urep,
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struct ib_cm_sidr_rep_event_param *krep)
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{
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urep->status = krep->status;
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urep->qkey = krep->qkey;
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urep->qpn = krep->qpn;
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};
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static int ib_ucm_event_process(struct ib_cm_event *evt,
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struct ib_ucm_event *uvt)
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{
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void *info = NULL;
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int result;
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switch (evt->event) {
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case IB_CM_REQ_RECEIVED:
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ib_ucm_event_req_get(&uvt->resp.u.req_resp,
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&evt->param.req_rcvd);
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uvt->data_len = IB_CM_REQ_PRIVATE_DATA_SIZE;
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uvt->resp.present |= (evt->param.req_rcvd.primary_path ?
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IB_UCM_PRES_PRIMARY : 0);
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uvt->resp.present |= (evt->param.req_rcvd.alternate_path ?
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IB_UCM_PRES_ALTERNATE : 0);
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break;
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case IB_CM_REP_RECEIVED:
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ib_ucm_event_rep_get(&uvt->resp.u.rep_resp,
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&evt->param.rep_rcvd);
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uvt->data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
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break;
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case IB_CM_RTU_RECEIVED:
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uvt->data_len = IB_CM_RTU_PRIVATE_DATA_SIZE;
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uvt->resp.u.send_status = evt->param.send_status;
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break;
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case IB_CM_DREQ_RECEIVED:
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uvt->data_len = IB_CM_DREQ_PRIVATE_DATA_SIZE;
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uvt->resp.u.send_status = evt->param.send_status;
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break;
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case IB_CM_DREP_RECEIVED:
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uvt->data_len = IB_CM_DREP_PRIVATE_DATA_SIZE;
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uvt->resp.u.send_status = evt->param.send_status;
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break;
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case IB_CM_MRA_RECEIVED:
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ib_ucm_event_mra_get(&uvt->resp.u.mra_resp,
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&evt->param.mra_rcvd);
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uvt->data_len = IB_CM_MRA_PRIVATE_DATA_SIZE;
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break;
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case IB_CM_REJ_RECEIVED:
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ib_ucm_event_rej_get(&uvt->resp.u.rej_resp,
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&evt->param.rej_rcvd);
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uvt->data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
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uvt->info_len = evt->param.rej_rcvd.ari_length;
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info = evt->param.rej_rcvd.ari;
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break;
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case IB_CM_LAP_RECEIVED:
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ib_ucm_event_lap_get(&uvt->resp.u.lap_resp,
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&evt->param.lap_rcvd);
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uvt->data_len = IB_CM_LAP_PRIVATE_DATA_SIZE;
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uvt->resp.present |= (evt->param.lap_rcvd.alternate_path ?
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IB_UCM_PRES_ALTERNATE : 0);
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break;
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case IB_CM_APR_RECEIVED:
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ib_ucm_event_apr_get(&uvt->resp.u.apr_resp,
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&evt->param.apr_rcvd);
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uvt->data_len = IB_CM_APR_PRIVATE_DATA_SIZE;
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uvt->info_len = evt->param.apr_rcvd.info_len;
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info = evt->param.apr_rcvd.apr_info;
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break;
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case IB_CM_SIDR_REQ_RECEIVED:
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ib_ucm_event_sidr_req_get(&uvt->resp.u.sidr_req_resp,
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&evt->param.sidr_req_rcvd);
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uvt->data_len = IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE;
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break;
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case IB_CM_SIDR_REP_RECEIVED:
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ib_ucm_event_sidr_rep_get(&uvt->resp.u.sidr_rep_resp,
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&evt->param.sidr_rep_rcvd);
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uvt->data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
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uvt->info_len = evt->param.sidr_rep_rcvd.info_len;
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info = evt->param.sidr_rep_rcvd.info;
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break;
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default:
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uvt->resp.u.send_status = evt->param.send_status;
|
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break;
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}
|
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|
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if (uvt->data_len && evt->private_data) {
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|
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uvt->data = kmalloc(uvt->data_len, GFP_KERNEL);
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if (!uvt->data) {
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result = -ENOMEM;
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goto error;
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}
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|
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memcpy(uvt->data, evt->private_data, uvt->data_len);
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uvt->resp.present |= IB_UCM_PRES_DATA;
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}
|
|
|
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if (uvt->info_len && info) {
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|
|
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uvt->info = kmalloc(uvt->info_len, GFP_KERNEL);
|
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if (!uvt->info) {
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result = -ENOMEM;
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goto error;
|
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}
|
|
|
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memcpy(uvt->info, info, uvt->info_len);
|
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uvt->resp.present |= IB_UCM_PRES_INFO;
|
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}
|
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|
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return 0;
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error:
|
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kfree(uvt->info);
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kfree(uvt->data);
|
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return result;
|
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}
|
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|
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static int ib_ucm_event_handler(struct ib_cm_id *cm_id,
|
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struct ib_cm_event *event)
|
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{
|
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struct ib_ucm_event *uevent;
|
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struct ib_ucm_context *ctx;
|
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int result = 0;
|
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int id;
|
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/*
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* lookup correct context based on event type.
|
|
*/
|
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switch (event->event) {
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case IB_CM_REQ_RECEIVED:
|
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id = (long)event->param.req_rcvd.listen_id->context;
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break;
|
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case IB_CM_SIDR_REQ_RECEIVED:
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id = (long)event->param.sidr_req_rcvd.listen_id->context;
|
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break;
|
|
default:
|
|
id = (long)cm_id->context;
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break;
|
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}
|
|
|
|
ucm_dbg("Event. CM ID <%d> event <%d>\n", id, event->event);
|
|
|
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ctx = ib_ucm_ctx_get(id);
|
|
if (!ctx)
|
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return -ENOENT;
|
|
|
|
if (event->event == IB_CM_REQ_RECEIVED ||
|
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event->event == IB_CM_SIDR_REQ_RECEIVED)
|
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id = IB_UCM_CM_ID_INVALID;
|
|
|
|
uevent = kmalloc(sizeof(*uevent), GFP_KERNEL);
|
|
if (!uevent) {
|
|
result = -ENOMEM;
|
|
goto done;
|
|
}
|
|
|
|
memset(uevent, 0, sizeof(*uevent));
|
|
|
|
uevent->resp.id = id;
|
|
uevent->resp.event = event->event;
|
|
|
|
result = ib_ucm_event_process(event, uevent);
|
|
if (result)
|
|
goto done;
|
|
|
|
uevent->ctx = ctx;
|
|
uevent->cm_id = ((event->event == IB_CM_REQ_RECEIVED ||
|
|
event->event == IB_CM_SIDR_REQ_RECEIVED ) ?
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cm_id : NULL);
|
|
|
|
down(&ctx->file->mutex);
|
|
|
|
list_add_tail(&uevent->file_list, &ctx->file->events);
|
|
list_add_tail(&uevent->ctx_list, &ctx->events);
|
|
|
|
wake_up_interruptible(&ctx->file->poll_wait);
|
|
|
|
up(&ctx->file->mutex);
|
|
done:
|
|
ctx->error = result;
|
|
ib_ucm_ctx_put(ctx); /* func reference */
|
|
return result;
|
|
}
|
|
|
|
static ssize_t ib_ucm_event(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
struct ib_ucm_context *ctx;
|
|
struct ib_ucm_event_get cmd;
|
|
struct ib_ucm_event *uevent = NULL;
|
|
int result = 0;
|
|
DEFINE_WAIT(wait);
|
|
|
|
if (out_len < sizeof(struct ib_ucm_event_resp))
|
|
return -ENOSPC;
|
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
|
|
return -EFAULT;
|
|
/*
|
|
* wait
|
|
*/
|
|
down(&file->mutex);
|
|
|
|
while (list_empty(&file->events)) {
|
|
|
|
if (file->filp->f_flags & O_NONBLOCK) {
|
|
result = -EAGAIN;
|
|
break;
|
|
}
|
|
|
|
if (signal_pending(current)) {
|
|
result = -ERESTARTSYS;
|
|
break;
|
|
}
|
|
|
|
prepare_to_wait(&file->poll_wait, &wait, TASK_INTERRUPTIBLE);
|
|
|
|
up(&file->mutex);
|
|
schedule();
|
|
down(&file->mutex);
|
|
|
|
finish_wait(&file->poll_wait, &wait);
|
|
}
|
|
|
|
if (result)
|
|
goto done;
|
|
|
|
uevent = list_entry(file->events.next, struct ib_ucm_event, file_list);
|
|
|
|
if (!uevent->cm_id)
|
|
goto user;
|
|
|
|
ctx = ib_ucm_ctx_alloc(file);
|
|
if (!ctx) {
|
|
result = -ENOMEM;
|
|
goto done;
|
|
}
|
|
|
|
ctx->cm_id = uevent->cm_id;
|
|
ctx->cm_id->cm_handler = ib_ucm_event_handler;
|
|
ctx->cm_id->context = (void *)(unsigned long)ctx->id;
|
|
|
|
uevent->resp.id = ctx->id;
|
|
|
|
user:
|
|
if (copy_to_user((void __user *)(unsigned long)cmd.response,
|
|
&uevent->resp, sizeof(uevent->resp))) {
|
|
result = -EFAULT;
|
|
goto done;
|
|
}
|
|
|
|
if (uevent->data) {
|
|
|
|
if (cmd.data_len < uevent->data_len) {
|
|
result = -ENOMEM;
|
|
goto done;
|
|
}
|
|
|
|
if (copy_to_user((void __user *)(unsigned long)cmd.data,
|
|
uevent->data, uevent->data_len)) {
|
|
result = -EFAULT;
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
if (uevent->info) {
|
|
|
|
if (cmd.info_len < uevent->info_len) {
|
|
result = -ENOMEM;
|
|
goto done;
|
|
}
|
|
|
|
if (copy_to_user((void __user *)(unsigned long)cmd.info,
|
|
uevent->info, uevent->info_len)) {
|
|
result = -EFAULT;
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
list_del(&uevent->file_list);
|
|
list_del(&uevent->ctx_list);
|
|
|
|
kfree(uevent->data);
|
|
kfree(uevent->info);
|
|
kfree(uevent);
|
|
done:
|
|
up(&file->mutex);
|
|
return result;
|
|
}
|
|
|
|
|
|
static ssize_t ib_ucm_create_id(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
struct ib_ucm_create_id cmd;
|
|
struct ib_ucm_create_id_resp resp;
|
|
struct ib_ucm_context *ctx;
|
|
int result;
|
|
|
|
if (out_len < sizeof(resp))
|
|
return -ENOSPC;
|
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
|
|
return -EFAULT;
|
|
|
|
ctx = ib_ucm_ctx_alloc(file);
|
|
if (!ctx)
|
|
return -ENOMEM;
|
|
|
|
ctx->cm_id = ib_create_cm_id(ib_ucm_event_handler,
|
|
(void *)(unsigned long)ctx->id);
|
|
if (!ctx->cm_id) {
|
|
result = -ENOMEM;
|
|
goto err_cm;
|
|
}
|
|
|
|
resp.id = ctx->id;
|
|
if (copy_to_user((void __user *)(unsigned long)cmd.response,
|
|
&resp, sizeof(resp))) {
|
|
result = -EFAULT;
|
|
goto err_ret;
|
|
}
|
|
|
|
return 0;
|
|
err_ret:
|
|
ib_destroy_cm_id(ctx->cm_id);
|
|
err_cm:
|
|
ib_ucm_ctx_put(ctx); /* user reference */
|
|
|
|
return result;
|
|
}
|
|
|
|
static ssize_t ib_ucm_destroy_id(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
struct ib_ucm_destroy_id cmd;
|
|
struct ib_ucm_context *ctx;
|
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
|
|
return -EFAULT;
|
|
|
|
ctx = ib_ucm_ctx_get(cmd.id);
|
|
if (!ctx)
|
|
return -ENOENT;
|
|
|
|
ib_ucm_ctx_put(ctx); /* user reference */
|
|
ib_ucm_ctx_put(ctx); /* func reference */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t ib_ucm_attr_id(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
struct ib_ucm_attr_id_resp resp;
|
|
struct ib_ucm_attr_id cmd;
|
|
struct ib_ucm_context *ctx;
|
|
int result = 0;
|
|
|
|
if (out_len < sizeof(resp))
|
|
return -ENOSPC;
|
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
|
|
return -EFAULT;
|
|
|
|
ctx = ib_ucm_ctx_get(cmd.id);
|
|
if (!ctx)
|
|
return -ENOENT;
|
|
|
|
down(&ctx->file->mutex);
|
|
if (ctx->file != file) {
|
|
result = -EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
resp.service_id = ctx->cm_id->service_id;
|
|
resp.service_mask = ctx->cm_id->service_mask;
|
|
resp.local_id = ctx->cm_id->local_id;
|
|
resp.remote_id = ctx->cm_id->remote_id;
|
|
|
|
if (copy_to_user((void __user *)(unsigned long)cmd.response,
|
|
&resp, sizeof(resp)))
|
|
result = -EFAULT;
|
|
|
|
done:
|
|
up(&ctx->file->mutex);
|
|
ib_ucm_ctx_put(ctx); /* func reference */
|
|
return result;
|
|
}
|
|
|
|
static ssize_t ib_ucm_listen(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
struct ib_ucm_listen cmd;
|
|
struct ib_ucm_context *ctx;
|
|
int result;
|
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
|
|
return -EFAULT;
|
|
|
|
ctx = ib_ucm_ctx_get(cmd.id);
|
|
if (!ctx)
|
|
return -ENOENT;
|
|
|
|
down(&ctx->file->mutex);
|
|
if (ctx->file != file)
|
|
result = -EINVAL;
|
|
else
|
|
result = ib_cm_listen(ctx->cm_id, cmd.service_id,
|
|
cmd.service_mask);
|
|
|
|
up(&ctx->file->mutex);
|
|
ib_ucm_ctx_put(ctx); /* func reference */
|
|
return result;
|
|
}
|
|
|
|
static ssize_t ib_ucm_establish(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
struct ib_ucm_establish cmd;
|
|
struct ib_ucm_context *ctx;
|
|
int result;
|
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
|
|
return -EFAULT;
|
|
|
|
ctx = ib_ucm_ctx_get(cmd.id);
|
|
if (!ctx)
|
|
return -ENOENT;
|
|
|
|
down(&ctx->file->mutex);
|
|
if (ctx->file != file)
|
|
result = -EINVAL;
|
|
else
|
|
result = ib_cm_establish(ctx->cm_id);
|
|
|
|
up(&ctx->file->mutex);
|
|
ib_ucm_ctx_put(ctx); /* func reference */
|
|
return result;
|
|
}
|
|
|
|
static int ib_ucm_alloc_data(const void **dest, u64 src, u32 len)
|
|
{
|
|
void *data;
|
|
|
|
*dest = NULL;
|
|
|
|
if (!len)
|
|
return 0;
|
|
|
|
data = kmalloc(len, GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
if (copy_from_user(data, (void __user *)(unsigned long)src, len)) {
|
|
kfree(data);
|
|
return -EFAULT;
|
|
}
|
|
|
|
*dest = data;
|
|
return 0;
|
|
}
|
|
|
|
static int ib_ucm_path_get(struct ib_sa_path_rec **path, u64 src)
|
|
{
|
|
struct ib_ucm_path_rec ucm_path;
|
|
struct ib_sa_path_rec *sa_path;
|
|
|
|
*path = NULL;
|
|
|
|
if (!src)
|
|
return 0;
|
|
|
|
sa_path = kmalloc(sizeof(*sa_path), GFP_KERNEL);
|
|
if (!sa_path)
|
|
return -ENOMEM;
|
|
|
|
if (copy_from_user(&ucm_path, (void __user *)(unsigned long)src,
|
|
sizeof(ucm_path))) {
|
|
|
|
kfree(sa_path);
|
|
return -EFAULT;
|
|
}
|
|
|
|
memcpy(sa_path->dgid.raw, ucm_path.dgid, sizeof(union ib_gid));
|
|
memcpy(sa_path->sgid.raw, ucm_path.sgid, sizeof(union ib_gid));
|
|
|
|
sa_path->dlid = ucm_path.dlid;
|
|
sa_path->slid = ucm_path.slid;
|
|
sa_path->raw_traffic = ucm_path.raw_traffic;
|
|
sa_path->flow_label = ucm_path.flow_label;
|
|
sa_path->hop_limit = ucm_path.hop_limit;
|
|
sa_path->traffic_class = ucm_path.traffic_class;
|
|
sa_path->reversible = ucm_path.reversible;
|
|
sa_path->numb_path = ucm_path.numb_path;
|
|
sa_path->pkey = ucm_path.pkey;
|
|
sa_path->sl = ucm_path.sl;
|
|
sa_path->mtu_selector = ucm_path.mtu_selector;
|
|
sa_path->mtu = ucm_path.mtu;
|
|
sa_path->rate_selector = ucm_path.rate_selector;
|
|
sa_path->rate = ucm_path.rate;
|
|
sa_path->packet_life_time = ucm_path.packet_life_time;
|
|
sa_path->preference = ucm_path.preference;
|
|
|
|
sa_path->packet_life_time_selector =
|
|
ucm_path.packet_life_time_selector;
|
|
|
|
*path = sa_path;
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t ib_ucm_send_req(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
struct ib_cm_req_param param;
|
|
struct ib_ucm_context *ctx;
|
|
struct ib_ucm_req cmd;
|
|
int result;
|
|
|
|
param.private_data = NULL;
|
|
param.primary_path = NULL;
|
|
param.alternate_path = NULL;
|
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
|
|
return -EFAULT;
|
|
|
|
result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len);
|
|
if (result)
|
|
goto done;
|
|
|
|
result = ib_ucm_path_get(¶m.primary_path, cmd.primary_path);
|
|
if (result)
|
|
goto done;
|
|
|
|
result = ib_ucm_path_get(¶m.alternate_path, cmd.alternate_path);
|
|
if (result)
|
|
goto done;
|
|
|
|
param.private_data_len = cmd.len;
|
|
param.service_id = cmd.sid;
|
|
param.qp_num = cmd.qpn;
|
|
param.qp_type = cmd.qp_type;
|
|
param.starting_psn = cmd.psn;
|
|
param.peer_to_peer = cmd.peer_to_peer;
|
|
param.responder_resources = cmd.responder_resources;
|
|
param.initiator_depth = cmd.initiator_depth;
|
|
param.remote_cm_response_timeout = cmd.remote_cm_response_timeout;
|
|
param.flow_control = cmd.flow_control;
|
|
param.local_cm_response_timeout = cmd.local_cm_response_timeout;
|
|
param.retry_count = cmd.retry_count;
|
|
param.rnr_retry_count = cmd.rnr_retry_count;
|
|
param.max_cm_retries = cmd.max_cm_retries;
|
|
param.srq = cmd.srq;
|
|
|
|
ctx = ib_ucm_ctx_get(cmd.id);
|
|
if (!ctx) {
|
|
result = -ENOENT;
|
|
goto done;
|
|
}
|
|
|
|
down(&ctx->file->mutex);
|
|
if (ctx->file != file)
|
|
result = -EINVAL;
|
|
else
|
|
result = ib_send_cm_req(ctx->cm_id, ¶m);
|
|
|
|
up(&ctx->file->mutex);
|
|
ib_ucm_ctx_put(ctx); /* func reference */
|
|
done:
|
|
kfree(param.private_data);
|
|
kfree(param.primary_path);
|
|
kfree(param.alternate_path);
|
|
|
|
return result;
|
|
}
|
|
|
|
static ssize_t ib_ucm_send_rep(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
struct ib_cm_rep_param param;
|
|
struct ib_ucm_context *ctx;
|
|
struct ib_ucm_rep cmd;
|
|
int result;
|
|
|
|
param.private_data = NULL;
|
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
|
|
return -EFAULT;
|
|
|
|
result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len);
|
|
if (result)
|
|
return result;
|
|
|
|
param.qp_num = cmd.qpn;
|
|
param.starting_psn = cmd.psn;
|
|
param.private_data_len = cmd.len;
|
|
param.responder_resources = cmd.responder_resources;
|
|
param.initiator_depth = cmd.initiator_depth;
|
|
param.target_ack_delay = cmd.target_ack_delay;
|
|
param.failover_accepted = cmd.failover_accepted;
|
|
param.flow_control = cmd.flow_control;
|
|
param.rnr_retry_count = cmd.rnr_retry_count;
|
|
param.srq = cmd.srq;
|
|
|
|
ctx = ib_ucm_ctx_get(cmd.id);
|
|
if (!ctx) {
|
|
result = -ENOENT;
|
|
goto done;
|
|
}
|
|
|
|
down(&ctx->file->mutex);
|
|
if (ctx->file != file)
|
|
result = -EINVAL;
|
|
else
|
|
result = ib_send_cm_rep(ctx->cm_id, ¶m);
|
|
|
|
up(&ctx->file->mutex);
|
|
ib_ucm_ctx_put(ctx); /* func reference */
|
|
done:
|
|
kfree(param.private_data);
|
|
|
|
return result;
|
|
}
|
|
|
|
static ssize_t ib_ucm_send_private_data(struct ib_ucm_file *file,
|
|
const char __user *inbuf, int in_len,
|
|
int (*func)(struct ib_cm_id *cm_id,
|
|
const void *private_data,
|
|
u8 private_data_len))
|
|
{
|
|
struct ib_ucm_private_data cmd;
|
|
struct ib_ucm_context *ctx;
|
|
const void *private_data = NULL;
|
|
int result;
|
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
|
|
return -EFAULT;
|
|
|
|
result = ib_ucm_alloc_data(&private_data, cmd.data, cmd.len);
|
|
if (result)
|
|
return result;
|
|
|
|
ctx = ib_ucm_ctx_get(cmd.id);
|
|
if (!ctx) {
|
|
result = -ENOENT;
|
|
goto done;
|
|
}
|
|
|
|
down(&ctx->file->mutex);
|
|
if (ctx->file != file)
|
|
result = -EINVAL;
|
|
else
|
|
result = func(ctx->cm_id, private_data, cmd.len);
|
|
|
|
up(&ctx->file->mutex);
|
|
ib_ucm_ctx_put(ctx); /* func reference */
|
|
done:
|
|
kfree(private_data);
|
|
|
|
return result;
|
|
}
|
|
|
|
static ssize_t ib_ucm_send_rtu(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_rtu);
|
|
}
|
|
|
|
static ssize_t ib_ucm_send_dreq(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_dreq);
|
|
}
|
|
|
|
static ssize_t ib_ucm_send_drep(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_drep);
|
|
}
|
|
|
|
static ssize_t ib_ucm_send_info(struct ib_ucm_file *file,
|
|
const char __user *inbuf, int in_len,
|
|
int (*func)(struct ib_cm_id *cm_id,
|
|
int status,
|
|
const void *info,
|
|
u8 info_len,
|
|
const void *data,
|
|
u8 data_len))
|
|
{
|
|
struct ib_ucm_context *ctx;
|
|
struct ib_ucm_info cmd;
|
|
const void *data = NULL;
|
|
const void *info = NULL;
|
|
int result;
|
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
|
|
return -EFAULT;
|
|
|
|
result = ib_ucm_alloc_data(&data, cmd.data, cmd.data_len);
|
|
if (result)
|
|
goto done;
|
|
|
|
result = ib_ucm_alloc_data(&info, cmd.info, cmd.info_len);
|
|
if (result)
|
|
goto done;
|
|
|
|
ctx = ib_ucm_ctx_get(cmd.id);
|
|
if (!ctx) {
|
|
result = -ENOENT;
|
|
goto done;
|
|
}
|
|
|
|
down(&ctx->file->mutex);
|
|
if (ctx->file != file)
|
|
result = -EINVAL;
|
|
else
|
|
result = func(ctx->cm_id, cmd.status,
|
|
info, cmd.info_len,
|
|
data, cmd.data_len);
|
|
|
|
up(&ctx->file->mutex);
|
|
ib_ucm_ctx_put(ctx); /* func reference */
|
|
done:
|
|
kfree(data);
|
|
kfree(info);
|
|
|
|
return result;
|
|
}
|
|
|
|
static ssize_t ib_ucm_send_rej(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_rej);
|
|
}
|
|
|
|
static ssize_t ib_ucm_send_apr(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_apr);
|
|
}
|
|
|
|
static ssize_t ib_ucm_send_mra(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
struct ib_ucm_context *ctx;
|
|
struct ib_ucm_mra cmd;
|
|
const void *data = NULL;
|
|
int result;
|
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
|
|
return -EFAULT;
|
|
|
|
result = ib_ucm_alloc_data(&data, cmd.data, cmd.len);
|
|
if (result)
|
|
return result;
|
|
|
|
ctx = ib_ucm_ctx_get(cmd.id);
|
|
if (!ctx) {
|
|
result = -ENOENT;
|
|
goto done;
|
|
}
|
|
|
|
down(&ctx->file->mutex);
|
|
if (ctx->file != file)
|
|
result = -EINVAL;
|
|
else
|
|
result = ib_send_cm_mra(ctx->cm_id, cmd.timeout,
|
|
data, cmd.len);
|
|
|
|
up(&ctx->file->mutex);
|
|
ib_ucm_ctx_put(ctx); /* func reference */
|
|
done:
|
|
kfree(data);
|
|
|
|
return result;
|
|
}
|
|
|
|
static ssize_t ib_ucm_send_lap(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
struct ib_ucm_context *ctx;
|
|
struct ib_sa_path_rec *path = NULL;
|
|
struct ib_ucm_lap cmd;
|
|
const void *data = NULL;
|
|
int result;
|
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
|
|
return -EFAULT;
|
|
|
|
result = ib_ucm_alloc_data(&data, cmd.data, cmd.len);
|
|
if (result)
|
|
goto done;
|
|
|
|
result = ib_ucm_path_get(&path, cmd.path);
|
|
if (result)
|
|
goto done;
|
|
|
|
ctx = ib_ucm_ctx_get(cmd.id);
|
|
if (!ctx) {
|
|
result = -ENOENT;
|
|
goto done;
|
|
}
|
|
|
|
down(&ctx->file->mutex);
|
|
if (ctx->file != file)
|
|
result = -EINVAL;
|
|
else
|
|
result = ib_send_cm_lap(ctx->cm_id, path, data, cmd.len);
|
|
|
|
up(&ctx->file->mutex);
|
|
ib_ucm_ctx_put(ctx); /* func reference */
|
|
done:
|
|
kfree(data);
|
|
kfree(path);
|
|
|
|
return result;
|
|
}
|
|
|
|
static ssize_t ib_ucm_send_sidr_req(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
struct ib_cm_sidr_req_param param;
|
|
struct ib_ucm_context *ctx;
|
|
struct ib_ucm_sidr_req cmd;
|
|
int result;
|
|
|
|
param.private_data = NULL;
|
|
param.path = NULL;
|
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
|
|
return -EFAULT;
|
|
|
|
result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len);
|
|
if (result)
|
|
goto done;
|
|
|
|
result = ib_ucm_path_get(¶m.path, cmd.path);
|
|
if (result)
|
|
goto done;
|
|
|
|
param.private_data_len = cmd.len;
|
|
param.service_id = cmd.sid;
|
|
param.timeout_ms = cmd.timeout;
|
|
param.max_cm_retries = cmd.max_cm_retries;
|
|
param.pkey = cmd.pkey;
|
|
|
|
ctx = ib_ucm_ctx_get(cmd.id);
|
|
if (!ctx) {
|
|
result = -ENOENT;
|
|
goto done;
|
|
}
|
|
|
|
down(&ctx->file->mutex);
|
|
if (ctx->file != file)
|
|
result = -EINVAL;
|
|
else
|
|
result = ib_send_cm_sidr_req(ctx->cm_id, ¶m);
|
|
|
|
up(&ctx->file->mutex);
|
|
ib_ucm_ctx_put(ctx); /* func reference */
|
|
done:
|
|
kfree(param.private_data);
|
|
kfree(param.path);
|
|
|
|
return result;
|
|
}
|
|
|
|
static ssize_t ib_ucm_send_sidr_rep(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
struct ib_cm_sidr_rep_param param;
|
|
struct ib_ucm_sidr_rep cmd;
|
|
struct ib_ucm_context *ctx;
|
|
int result;
|
|
|
|
param.info = NULL;
|
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
|
|
return -EFAULT;
|
|
|
|
result = ib_ucm_alloc_data(¶m.private_data,
|
|
cmd.data, cmd.data_len);
|
|
if (result)
|
|
goto done;
|
|
|
|
result = ib_ucm_alloc_data(¶m.info, cmd.info, cmd.info_len);
|
|
if (result)
|
|
goto done;
|
|
|
|
param.qp_num = cmd.qpn;
|
|
param.qkey = cmd.qkey;
|
|
param.status = cmd.status;
|
|
param.info_length = cmd.info_len;
|
|
param.private_data_len = cmd.data_len;
|
|
|
|
ctx = ib_ucm_ctx_get(cmd.id);
|
|
if (!ctx) {
|
|
result = -ENOENT;
|
|
goto done;
|
|
}
|
|
|
|
down(&ctx->file->mutex);
|
|
if (ctx->file != file)
|
|
result = -EINVAL;
|
|
else
|
|
result = ib_send_cm_sidr_rep(ctx->cm_id, ¶m);
|
|
|
|
up(&ctx->file->mutex);
|
|
ib_ucm_ctx_put(ctx); /* func reference */
|
|
done:
|
|
kfree(param.private_data);
|
|
kfree(param.info);
|
|
|
|
return result;
|
|
}
|
|
|
|
static ssize_t (*ucm_cmd_table[])(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len) = {
|
|
[IB_USER_CM_CMD_CREATE_ID] = ib_ucm_create_id,
|
|
[IB_USER_CM_CMD_DESTROY_ID] = ib_ucm_destroy_id,
|
|
[IB_USER_CM_CMD_ATTR_ID] = ib_ucm_attr_id,
|
|
[IB_USER_CM_CMD_LISTEN] = ib_ucm_listen,
|
|
[IB_USER_CM_CMD_ESTABLISH] = ib_ucm_establish,
|
|
[IB_USER_CM_CMD_SEND_REQ] = ib_ucm_send_req,
|
|
[IB_USER_CM_CMD_SEND_REP] = ib_ucm_send_rep,
|
|
[IB_USER_CM_CMD_SEND_RTU] = ib_ucm_send_rtu,
|
|
[IB_USER_CM_CMD_SEND_DREQ] = ib_ucm_send_dreq,
|
|
[IB_USER_CM_CMD_SEND_DREP] = ib_ucm_send_drep,
|
|
[IB_USER_CM_CMD_SEND_REJ] = ib_ucm_send_rej,
|
|
[IB_USER_CM_CMD_SEND_MRA] = ib_ucm_send_mra,
|
|
[IB_USER_CM_CMD_SEND_LAP] = ib_ucm_send_lap,
|
|
[IB_USER_CM_CMD_SEND_APR] = ib_ucm_send_apr,
|
|
[IB_USER_CM_CMD_SEND_SIDR_REQ] = ib_ucm_send_sidr_req,
|
|
[IB_USER_CM_CMD_SEND_SIDR_REP] = ib_ucm_send_sidr_rep,
|
|
[IB_USER_CM_CMD_EVENT] = ib_ucm_event,
|
|
};
|
|
|
|
static ssize_t ib_ucm_write(struct file *filp, const char __user *buf,
|
|
size_t len, loff_t *pos)
|
|
{
|
|
struct ib_ucm_file *file = filp->private_data;
|
|
struct ib_ucm_cmd_hdr hdr;
|
|
ssize_t result;
|
|
|
|
if (len < sizeof(hdr))
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(&hdr, buf, sizeof(hdr)))
|
|
return -EFAULT;
|
|
|
|
ucm_dbg("Write. cmd <%d> in <%d> out <%d> len <%Zu>\n",
|
|
hdr.cmd, hdr.in, hdr.out, len);
|
|
|
|
if (hdr.cmd < 0 || hdr.cmd >= ARRAY_SIZE(ucm_cmd_table))
|
|
return -EINVAL;
|
|
|
|
if (hdr.in + sizeof(hdr) > len)
|
|
return -EINVAL;
|
|
|
|
result = ucm_cmd_table[hdr.cmd](file, buf + sizeof(hdr),
|
|
hdr.in, hdr.out);
|
|
if (!result)
|
|
result = len;
|
|
|
|
return result;
|
|
}
|
|
|
|
static unsigned int ib_ucm_poll(struct file *filp,
|
|
struct poll_table_struct *wait)
|
|
{
|
|
struct ib_ucm_file *file = filp->private_data;
|
|
unsigned int mask = 0;
|
|
|
|
poll_wait(filp, &file->poll_wait, wait);
|
|
|
|
if (!list_empty(&file->events))
|
|
mask = POLLIN | POLLRDNORM;
|
|
|
|
return mask;
|
|
}
|
|
|
|
static int ib_ucm_open(struct inode *inode, struct file *filp)
|
|
{
|
|
struct ib_ucm_file *file;
|
|
|
|
file = kmalloc(sizeof(*file), GFP_KERNEL);
|
|
if (!file)
|
|
return -ENOMEM;
|
|
|
|
INIT_LIST_HEAD(&file->events);
|
|
INIT_LIST_HEAD(&file->ctxs);
|
|
init_waitqueue_head(&file->poll_wait);
|
|
|
|
init_MUTEX(&file->mutex);
|
|
|
|
filp->private_data = file;
|
|
file->filp = filp;
|
|
|
|
ucm_dbg("Created struct\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ib_ucm_close(struct inode *inode, struct file *filp)
|
|
{
|
|
struct ib_ucm_file *file = filp->private_data;
|
|
struct ib_ucm_context *ctx;
|
|
|
|
down(&file->mutex);
|
|
|
|
while (!list_empty(&file->ctxs)) {
|
|
|
|
ctx = list_entry(file->ctxs.next,
|
|
struct ib_ucm_context, file_list);
|
|
|
|
up(&ctx->file->mutex);
|
|
ib_ucm_ctx_put(ctx); /* user reference */
|
|
down(&file->mutex);
|
|
}
|
|
|
|
up(&file->mutex);
|
|
|
|
kfree(file);
|
|
|
|
ucm_dbg("Deleted struct\n");
|
|
return 0;
|
|
}
|
|
|
|
static struct file_operations ib_ucm_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = ib_ucm_open,
|
|
.release = ib_ucm_close,
|
|
.write = ib_ucm_write,
|
|
.poll = ib_ucm_poll,
|
|
};
|
|
|
|
|
|
static struct class *ib_ucm_class;
|
|
static struct cdev ib_ucm_cdev;
|
|
|
|
static int __init ib_ucm_init(void)
|
|
{
|
|
int result;
|
|
|
|
result = register_chrdev_region(IB_UCM_DEV, 1, "infiniband_cm");
|
|
if (result) {
|
|
ucm_dbg("Error <%d> registering dev\n", result);
|
|
goto err_chr;
|
|
}
|
|
|
|
cdev_init(&ib_ucm_cdev, &ib_ucm_fops);
|
|
|
|
result = cdev_add(&ib_ucm_cdev, IB_UCM_DEV, 1);
|
|
if (result) {
|
|
ucm_dbg("Error <%d> adding cdev\n", result);
|
|
goto err_cdev;
|
|
}
|
|
|
|
ib_ucm_class = class_create(THIS_MODULE, "infiniband_cm");
|
|
if (IS_ERR(ib_ucm_class)) {
|
|
result = PTR_ERR(ib_ucm_class);
|
|
ucm_dbg("Error <%d> creating class\n", result);
|
|
goto err_class;
|
|
}
|
|
|
|
class_device_create(ib_ucm_class, IB_UCM_DEV, NULL, "ucm");
|
|
|
|
idr_init(&ctx_id_table);
|
|
init_MUTEX(&ctx_id_mutex);
|
|
|
|
return 0;
|
|
err_class:
|
|
cdev_del(&ib_ucm_cdev);
|
|
err_cdev:
|
|
unregister_chrdev_region(IB_UCM_DEV, 1);
|
|
err_chr:
|
|
return result;
|
|
}
|
|
|
|
static void __exit ib_ucm_cleanup(void)
|
|
{
|
|
class_device_destroy(ib_ucm_class, IB_UCM_DEV);
|
|
class_destroy(ib_ucm_class);
|
|
cdev_del(&ib_ucm_cdev);
|
|
unregister_chrdev_region(IB_UCM_DEV, 1);
|
|
}
|
|
|
|
module_init(ib_ucm_init);
|
|
module_exit(ib_ucm_cleanup);
|