--- /dev/null
+/*
+ * Copyright (c) 2005 Topspin Communications. 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.
+ *
+ * $Id: ucm.c 2594 2005-06-13 19:46:02Z libor $
+ */
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/poll.h>
+#include <linux/file.h>
+#include <linux/mount.h>
+#include <linux/cdev.h>
+
+#include <asm/uaccess.h>
+
+#include "ucm.h"
+
+MODULE_AUTHOR("Libor Michalek");
+MODULE_DESCRIPTION("InfiniBand userspace Connection Manager access");
+MODULE_LICENSE("Dual BSD/GPL");
+
+enum {
+ IB_UCM_MAJOR = 231,
+ IB_UCM_MINOR = 255
+};
+
+#define IB_UCM_DEV MKDEV(IB_UCM_MAJOR, IB_UCM_MINOR)
+
+static struct semaphore ctx_id_mutex;
+static struct idr ctx_id_table;
+static int ctx_id_rover = 0;
+
+static struct ib_ucm_context *ib_ucm_ctx_get(int id)
+{
+ struct ib_ucm_context *ctx;
+
+ down(&ctx_id_mutex);
+ ctx = idr_find(&ctx_id_table, id);
+ if (ctx)
+ ctx->ref++;
+ up(&ctx_id_mutex);
+
+ return ctx;
+}
+
+static void ib_ucm_ctx_put(struct ib_ucm_context *ctx)
+{
+ struct ib_ucm_event *uevent;
+
+ down(&ctx_id_mutex);
+
+ ctx->ref--;
+ if (!ctx->ref)
+ idr_remove(&ctx_id_table, ctx->id);
+
+ up(&ctx_id_mutex);
+
+ if (ctx->ref)
+ return;
+
+ down(&ctx->file->mutex);
+
+ list_del(&ctx->file_list);
+ while (!list_empty(&ctx->events)) {
+
+ uevent = list_entry(ctx->events.next,
+ struct ib_ucm_event, ctx_list);
+ list_del(&uevent->file_list);
+ list_del(&uevent->ctx_list);
+
+ /* clear incoming connections. */
+ if (uevent->cm_id)
+ ib_destroy_cm_id(uevent->cm_id);
+
+ kfree(uevent);
+ }
+
+ up(&ctx->file->mutex);
+
+ printk(KERN_ERR "UCM: Destroyed CM ID <%d>\n", ctx->id);
+
+ ib_destroy_cm_id(ctx->cm_id);
+ kfree(ctx);
+}
+
+static struct ib_ucm_context *ib_ucm_ctx_alloc(struct ib_ucm_file *file)
+{
+ struct ib_ucm_context *ctx;
+ int result;
+
+ ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return NULL;
+
+ ctx->ref = 1; /* user reference */
+ ctx->file = file;
+
+ INIT_LIST_HEAD(&ctx->events);
+ init_MUTEX(&ctx->mutex);
+
+ list_add_tail(&ctx->file_list, &file->ctxs);
+
+ ctx_id_rover = (ctx_id_rover + 1) & INT_MAX;
+retry:
+ result = idr_pre_get(&ctx_id_table, GFP_KERNEL);
+ if (!result)
+ goto error;
+
+ down(&ctx_id_mutex);
+ result = idr_get_new_above(&ctx_id_table, ctx, ctx_id_rover, &ctx->id);
+ up(&ctx_id_mutex);
+
+ if (result == -EAGAIN)
+ goto retry;
+ if (result)
+ goto error;
+
+ printk(KERN_ERR "UCM: Allocated CM ID <%d>\n", ctx->id);
+
+ return ctx;
+error:
+ list_del(&ctx->file_list);
+ kfree(ctx);
+
+ return NULL;
+}
+/*
+ * Event portion of the API, handle CM events
+ * and allow event polling.
+ */
+static void ib_ucm_event_path_get(struct ib_ucm_path_rec *upath,
+ struct ib_sa_path_rec *kpath)
+{
+ if (!kpath || !upath)
+ return;
+
+ memcpy(upath->dgid, kpath->dgid.raw, sizeof(union ib_gid));
+ memcpy(upath->sgid, kpath->sgid.raw, sizeof(union ib_gid));
+
+ upath->dlid = kpath->dlid;
+ upath->slid = kpath->slid;
+ upath->raw_traffic = kpath->raw_traffic;
+ upath->flow_label = kpath->flow_label;
+ upath->hop_limit = kpath->hop_limit;
+ upath->traffic_class = kpath->traffic_class;
+ upath->reversible = kpath->reversible;
+ upath->numb_path = kpath->numb_path;
+ upath->pkey = kpath->pkey;
+ upath->sl = kpath->sl;
+ upath->mtu_selector = kpath->mtu_selector;
+ upath->mtu = kpath->mtu;
+ upath->rate_selector = kpath->rate_selector;
+ upath->rate = kpath->rate;
+ upath->packet_life_time = kpath->packet_life_time;
+ upath->preference = kpath->preference;
+
+ upath->packet_life_time_selector =
+ kpath->packet_life_time_selector;
+}
+
+static void ib_ucm_event_req_get(struct ib_ucm_req_event_resp *ureq,
+ struct ib_cm_req_event_param *kreq)
+{
+ ureq->listen_id = (long)kreq->listen_id->context;
+
+ ureq->remote_ca_guid = kreq->remote_ca_guid;
+ ureq->remote_qkey = kreq->remote_qkey;
+ ureq->remote_qpn = kreq->remote_qpn;
+ ureq->qp_type = kreq->qp_type;
+ ureq->starting_psn = kreq->starting_psn;
+ ureq->responder_resources = kreq->responder_resources;
+ ureq->initiator_depth = kreq->initiator_depth;
+ ureq->local_cm_response_timeout = kreq->local_cm_response_timeout;
+ ureq->flow_control = kreq->flow_control;
+ ureq->remote_cm_response_timeout = kreq->remote_cm_response_timeout;
+ ureq->retry_count = kreq->retry_count;
+ ureq->rnr_retry_count = kreq->rnr_retry_count;
+ ureq->srq = kreq->srq;
+
+ ib_ucm_event_path_get(&ureq->primary_path, kreq->primary_path);
+ ib_ucm_event_path_get(&ureq->alternate_path, kreq->alternate_path);
+}
+
+static void ib_ucm_event_rep_get(struct ib_ucm_rep_event_resp *urep,
+ struct ib_cm_rep_event_param *krep)
+{
+ urep->remote_ca_guid = krep->remote_ca_guid;
+ urep->remote_qkey = krep->remote_qkey;
+ urep->remote_qpn = krep->remote_qpn;
+ urep->starting_psn = krep->starting_psn;
+ urep->responder_resources = krep->responder_resources;
+ urep->initiator_depth = krep->initiator_depth;
+ urep->target_ack_delay = krep->target_ack_delay;
+ urep->failover_accepted = krep->failover_accepted;
+ urep->flow_control = krep->flow_control;
+ urep->rnr_retry_count = krep->rnr_retry_count;
+ urep->srq = krep->srq;
+}
+
+static void ib_ucm_event_rej_get(struct ib_ucm_rej_event_resp *urej,
+ struct ib_cm_rej_event_param *krej)
+{
+ urej->reason = krej->reason;
+}
+
+static void ib_ucm_event_mra_get(struct ib_ucm_mra_event_resp *umra,
+ struct ib_cm_mra_event_param *kmra)
+{
+ umra->timeout = kmra->service_timeout;
+}
+
+static void ib_ucm_event_lap_get(struct ib_ucm_lap_event_resp *ulap,
+ struct ib_cm_lap_event_param *klap)
+{
+ ib_ucm_event_path_get(&ulap->path, klap->alternate_path);
+}
+
+static void ib_ucm_event_apr_get(struct ib_ucm_apr_event_resp *uapr,
+ struct ib_cm_apr_event_param *kapr)
+{
+ uapr->status = kapr->ap_status;
+}
+
+static void ib_ucm_event_sidr_req_get(struct ib_ucm_sidr_req_event_resp *ureq,
+ struct ib_cm_sidr_req_event_param *kreq)
+{
+ ureq->listen_id = (long)kreq->listen_id->context;
+ ureq->pkey = kreq->pkey;
+}
+
+static void ib_ucm_event_sidr_rep_get(struct ib_ucm_sidr_rep_event_resp *urep,
+ struct ib_cm_sidr_rep_event_param *krep)
+{
+ urep->status = krep->status;
+ urep->qkey = krep->qkey;
+ urep->qpn = krep->qpn;
+};
+
+static int ib_ucm_event_process(struct ib_cm_event *evt,
+ struct ib_ucm_event *uvt)
+{
+ void *info = NULL;
+ int result;
+
+ switch (evt->event) {
+ case IB_CM_REQ_RECEIVED:
+ ib_ucm_event_req_get(&uvt->resp.u.req_resp,
+ &evt->param.req_rcvd);
+ uvt->data_len = IB_CM_REQ_PRIVATE_DATA_SIZE;
+ uvt->resp.present |= (evt->param.req_rcvd.primary_path ?
+ IB_UCM_PRES_PRIMARY : 0);
+ uvt->resp.present |= (evt->param.req_rcvd.alternate_path ?
+ IB_UCM_PRES_ALTERNATE : 0);
+ break;
+ case IB_CM_REP_RECEIVED:
+ ib_ucm_event_rep_get(&uvt->resp.u.rep_resp,
+ &evt->param.rep_rcvd);
+ uvt->data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
+
+ break;
+ case IB_CM_RTU_RECEIVED:
+ uvt->data_len = IB_CM_RTU_PRIVATE_DATA_SIZE;
+ uvt->resp.u.send_status = evt->param.send_status;
+
+ break;
+ case IB_CM_DREQ_RECEIVED:
+ uvt->data_len = IB_CM_DREQ_PRIVATE_DATA_SIZE;
+ uvt->resp.u.send_status = evt->param.send_status;
+
+ break;
+ case IB_CM_DREP_RECEIVED:
+ uvt->data_len = IB_CM_DREP_PRIVATE_DATA_SIZE;
+ uvt->resp.u.send_status = evt->param.send_status;
+
+ break;
+ case IB_CM_MRA_RECEIVED:
+ ib_ucm_event_mra_get(&uvt->resp.u.mra_resp,
+ &evt->param.mra_rcvd);
+ uvt->data_len = IB_CM_MRA_PRIVATE_DATA_SIZE;
+
+ break;
+ case IB_CM_REJ_RECEIVED:
+ ib_ucm_event_rej_get(&uvt->resp.u.rej_resp,
+ &evt->param.rej_rcvd);
+ uvt->data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
+ uvt->info_len = evt->param.rej_rcvd.ari_length;
+ info = evt->param.rej_rcvd.ari;
+
+ break;
+ case IB_CM_LAP_RECEIVED:
+ ib_ucm_event_lap_get(&uvt->resp.u.lap_resp,
+ &evt->param.lap_rcvd);
+ uvt->data_len = IB_CM_LAP_PRIVATE_DATA_SIZE;
+ uvt->resp.present |= (evt->param.lap_rcvd.alternate_path ?
+ IB_UCM_PRES_ALTERNATE : 0);
+ break;
+ case IB_CM_APR_RECEIVED:
+ ib_ucm_event_apr_get(&uvt->resp.u.apr_resp,
+ &evt->param.apr_rcvd);
+ uvt->data_len = IB_CM_APR_PRIVATE_DATA_SIZE;
+ uvt->info_len = evt->param.apr_rcvd.info_len;
+ info = evt->param.apr_rcvd.apr_info;
+
+ break;
+ case IB_CM_SIDR_REQ_RECEIVED:
+ ib_ucm_event_sidr_req_get(&uvt->resp.u.sidr_req_resp,
+ &evt->param.sidr_req_rcvd);
+ uvt->data_len = IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE;
+
+ break;
+ case IB_CM_SIDR_REP_RECEIVED:
+ ib_ucm_event_sidr_rep_get(&uvt->resp.u.sidr_rep_resp,
+ &evt->param.sidr_rep_rcvd);
+ uvt->data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
+ uvt->info_len = evt->param.sidr_rep_rcvd.info_len;
+ info = evt->param.sidr_rep_rcvd.info;
+
+ break;
+ default:
+ uvt->resp.u.send_status = evt->param.send_status;
+
+ break;
+ }
+
+ if (uvt->data_len && evt->private_data) {
+
+ uvt->data = kmalloc(uvt->data_len, GFP_KERNEL);
+ if (!uvt->data) {
+ result = -ENOMEM;
+ goto error;
+ }
+
+ memcpy(uvt->data, evt->private_data, uvt->data_len);
+ uvt->resp.present |= IB_UCM_PRES_DATA;
+ }
+
+ if (uvt->info_len && info) {
+
+ uvt->info = kmalloc(uvt->info_len, GFP_KERNEL);
+ if (!uvt->info) {
+ result = -ENOMEM;
+ goto error;
+ }
+
+ memcpy(uvt->info, info, uvt->info_len);
+ uvt->resp.present |= IB_UCM_PRES_INFO;
+ }
+
+ return 0;
+error:
+ if (uvt->info)
+ kfree(uvt->info);
+ if (uvt->data)
+ kfree(uvt->data);
+ return result;
+}
+
+static int ib_ucm_event_handler(struct ib_cm_id *cm_id,
+ struct ib_cm_event *event)
+{
+ struct ib_ucm_event *uevent;
+ struct ib_ucm_context *ctx;
+ int result = 0;
+ int id;
+ /*
+ * lookup correct context based on event type.
+ */
+ switch (event->event) {
+ case IB_CM_REQ_RECEIVED:
+ id = (long)event->param.req_rcvd.listen_id->context;
+ break;
+ case IB_CM_SIDR_REQ_RECEIVED:
+ id = (long)event->param.sidr_req_rcvd.listen_id->context;
+ break;
+ default:
+ id = (long)cm_id->context;
+ break;
+ }
+
+ printk(KERN_ERR "UCM: Event. CM ID <%d> event <%d>\n",
+ id, event->event);
+
+ ctx = ib_ucm_ctx_get(id);
+ if (!ctx)
+ return -ENOENT;
+
+ if (event->event == IB_CM_REQ_RECEIVED ||
+ event->event == IB_CM_SIDR_REQ_RECEIVED)
+ 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 ) ?
+ 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);
+
+ if (uevent->data)
+ kfree(uevent->data);
+ if (uevent->info)
+ 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:
+ if (param.private_data)
+ kfree(param.private_data);
+ if (param.primary_path)
+ kfree(param.primary_path);
+ if (param.alternate_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:
+ if (param.private_data)
+ 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:
+ if (private_data)
+ 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:
+ if (data)
+ kfree(data);
+ if (info)
+ 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:
+ if (data)
+ 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:
+ if (data)
+ kfree(data);
+ if (path)
+ 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:
+ if (param.private_data)
+ kfree(param.private_data);
+ if (param.path)
+ 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:
+ if (param.private_data)
+ kfree(param.private_data);
+ if (param.info)
+ 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;
+
+ printk(KERN_ERR "UCM: 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;
+
+ printk(KERN_ERR "UCM: 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);
+
+ printk(KERN_ERR "UCM: 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_simple *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) {
+ printk(KERN_ERR "UCM: 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) {
+ printk(KERN_ERR "UCM: Error <%d> adding cdev\n", result);
+ goto err_cdev;
+ }
+
+ ib_ucm_class = class_simple_create(THIS_MODULE, "infiniband_cm");
+ if (IS_ERR(ib_ucm_class)) {
+ result = PTR_ERR(ib_ucm_class);
+ printk(KERN_ERR "UCM: Error <%d> creating class\n", result);
+ goto err_class;
+ }
+
+ class_simple_device_add(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_simple_device_remove(IB_UCM_DEV);
+ class_simple_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);
projects / kernel / kernel-generic.git / commitdiff