2005-07-27 12:45:37 -06:00
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/*
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* Copyright (c) 2005 Intel Inc. All rights reserved.
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* Copyright (c) 2005 Voltaire, 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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* $Id: mad_rmpp.c 1921 2005-03-02 22:58:44Z sean.hefty $
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*/
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#include <linux/dma-mapping.h>
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#include "mad_priv.h"
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#include "mad_rmpp.h"
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enum rmpp_state {
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RMPP_STATE_ACTIVE,
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RMPP_STATE_TIMEOUT,
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RMPP_STATE_COMPLETE
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};
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struct mad_rmpp_recv {
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struct ib_mad_agent_private *agent;
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struct list_head list;
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struct work_struct timeout_work;
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struct work_struct cleanup_work;
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wait_queue_head_t wait;
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enum rmpp_state state;
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spinlock_t lock;
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atomic_t refcount;
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struct ib_ah *ah;
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struct ib_mad_recv_wc *rmpp_wc;
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struct ib_mad_recv_buf *cur_seg_buf;
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int last_ack;
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int seg_num;
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int newwin;
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2005-08-13 22:05:57 -06:00
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__be64 tid;
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2005-07-27 12:45:37 -06:00
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u32 src_qp;
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u16 slid;
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u8 mgmt_class;
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u8 class_version;
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u8 method;
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};
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static void destroy_rmpp_recv(struct mad_rmpp_recv *rmpp_recv)
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{
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atomic_dec(&rmpp_recv->refcount);
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wait_event(rmpp_recv->wait, !atomic_read(&rmpp_recv->refcount));
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ib_destroy_ah(rmpp_recv->ah);
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kfree(rmpp_recv);
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}
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void ib_cancel_rmpp_recvs(struct ib_mad_agent_private *agent)
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{
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struct mad_rmpp_recv *rmpp_recv, *temp_rmpp_recv;
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unsigned long flags;
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spin_lock_irqsave(&agent->lock, flags);
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list_for_each_entry(rmpp_recv, &agent->rmpp_list, list) {
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cancel_delayed_work(&rmpp_recv->timeout_work);
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cancel_delayed_work(&rmpp_recv->cleanup_work);
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}
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spin_unlock_irqrestore(&agent->lock, flags);
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flush_workqueue(agent->qp_info->port_priv->wq);
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list_for_each_entry_safe(rmpp_recv, temp_rmpp_recv,
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&agent->rmpp_list, list) {
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list_del(&rmpp_recv->list);
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if (rmpp_recv->state != RMPP_STATE_COMPLETE)
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ib_free_recv_mad(rmpp_recv->rmpp_wc);
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destroy_rmpp_recv(rmpp_recv);
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}
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}
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static void recv_timeout_handler(void *data)
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{
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struct mad_rmpp_recv *rmpp_recv = data;
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struct ib_mad_recv_wc *rmpp_wc;
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unsigned long flags;
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spin_lock_irqsave(&rmpp_recv->agent->lock, flags);
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if (rmpp_recv->state != RMPP_STATE_ACTIVE) {
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spin_unlock_irqrestore(&rmpp_recv->agent->lock, flags);
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return;
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}
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rmpp_recv->state = RMPP_STATE_TIMEOUT;
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list_del(&rmpp_recv->list);
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spin_unlock_irqrestore(&rmpp_recv->agent->lock, flags);
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/* TODO: send abort. */
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rmpp_wc = rmpp_recv->rmpp_wc;
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destroy_rmpp_recv(rmpp_recv);
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ib_free_recv_mad(rmpp_wc);
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}
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static void recv_cleanup_handler(void *data)
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{
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struct mad_rmpp_recv *rmpp_recv = data;
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unsigned long flags;
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spin_lock_irqsave(&rmpp_recv->agent->lock, flags);
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list_del(&rmpp_recv->list);
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spin_unlock_irqrestore(&rmpp_recv->agent->lock, flags);
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destroy_rmpp_recv(rmpp_recv);
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}
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static struct mad_rmpp_recv *
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create_rmpp_recv(struct ib_mad_agent_private *agent,
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struct ib_mad_recv_wc *mad_recv_wc)
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{
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struct mad_rmpp_recv *rmpp_recv;
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struct ib_mad_hdr *mad_hdr;
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rmpp_recv = kmalloc(sizeof *rmpp_recv, GFP_KERNEL);
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if (!rmpp_recv)
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return NULL;
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rmpp_recv->ah = ib_create_ah_from_wc(agent->agent.qp->pd,
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mad_recv_wc->wc,
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mad_recv_wc->recv_buf.grh,
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agent->agent.port_num);
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if (IS_ERR(rmpp_recv->ah))
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goto error;
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rmpp_recv->agent = agent;
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init_waitqueue_head(&rmpp_recv->wait);
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INIT_WORK(&rmpp_recv->timeout_work, recv_timeout_handler, rmpp_recv);
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INIT_WORK(&rmpp_recv->cleanup_work, recv_cleanup_handler, rmpp_recv);
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spin_lock_init(&rmpp_recv->lock);
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rmpp_recv->state = RMPP_STATE_ACTIVE;
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atomic_set(&rmpp_recv->refcount, 1);
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rmpp_recv->rmpp_wc = mad_recv_wc;
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rmpp_recv->cur_seg_buf = &mad_recv_wc->recv_buf;
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rmpp_recv->newwin = 1;
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rmpp_recv->seg_num = 1;
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rmpp_recv->last_ack = 0;
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mad_hdr = &mad_recv_wc->recv_buf.mad->mad_hdr;
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rmpp_recv->tid = mad_hdr->tid;
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rmpp_recv->src_qp = mad_recv_wc->wc->src_qp;
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rmpp_recv->slid = mad_recv_wc->wc->slid;
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rmpp_recv->mgmt_class = mad_hdr->mgmt_class;
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rmpp_recv->class_version = mad_hdr->class_version;
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rmpp_recv->method = mad_hdr->method;
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return rmpp_recv;
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error: kfree(rmpp_recv);
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return NULL;
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}
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static inline void deref_rmpp_recv(struct mad_rmpp_recv *rmpp_recv)
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{
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if (atomic_dec_and_test(&rmpp_recv->refcount))
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wake_up(&rmpp_recv->wait);
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}
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static struct mad_rmpp_recv *
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find_rmpp_recv(struct ib_mad_agent_private *agent,
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struct ib_mad_recv_wc *mad_recv_wc)
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{
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struct mad_rmpp_recv *rmpp_recv;
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struct ib_mad_hdr *mad_hdr = &mad_recv_wc->recv_buf.mad->mad_hdr;
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list_for_each_entry(rmpp_recv, &agent->rmpp_list, list) {
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if (rmpp_recv->tid == mad_hdr->tid &&
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rmpp_recv->src_qp == mad_recv_wc->wc->src_qp &&
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rmpp_recv->slid == mad_recv_wc->wc->slid &&
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rmpp_recv->mgmt_class == mad_hdr->mgmt_class &&
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rmpp_recv->class_version == mad_hdr->class_version &&
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rmpp_recv->method == mad_hdr->method)
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return rmpp_recv;
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}
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return NULL;
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}
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static struct mad_rmpp_recv *
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acquire_rmpp_recv(struct ib_mad_agent_private *agent,
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struct ib_mad_recv_wc *mad_recv_wc)
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{
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struct mad_rmpp_recv *rmpp_recv;
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unsigned long flags;
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spin_lock_irqsave(&agent->lock, flags);
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rmpp_recv = find_rmpp_recv(agent, mad_recv_wc);
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if (rmpp_recv)
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atomic_inc(&rmpp_recv->refcount);
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spin_unlock_irqrestore(&agent->lock, flags);
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return rmpp_recv;
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}
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static struct mad_rmpp_recv *
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insert_rmpp_recv(struct ib_mad_agent_private *agent,
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struct mad_rmpp_recv *rmpp_recv)
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{
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struct mad_rmpp_recv *cur_rmpp_recv;
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cur_rmpp_recv = find_rmpp_recv(agent, rmpp_recv->rmpp_wc);
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if (!cur_rmpp_recv)
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list_add_tail(&rmpp_recv->list, &agent->rmpp_list);
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return cur_rmpp_recv;
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}
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static int data_offset(u8 mgmt_class)
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{
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if (mgmt_class == IB_MGMT_CLASS_SUBN_ADM)
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return offsetof(struct ib_sa_mad, data);
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else if ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) &&
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(mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END))
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return offsetof(struct ib_vendor_mad, data);
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else
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return offsetof(struct ib_rmpp_mad, data);
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}
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static void format_ack(struct ib_rmpp_mad *ack,
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struct ib_rmpp_mad *data,
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struct mad_rmpp_recv *rmpp_recv)
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{
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unsigned long flags;
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memcpy(&ack->mad_hdr, &data->mad_hdr,
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data_offset(data->mad_hdr.mgmt_class));
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ack->mad_hdr.method ^= IB_MGMT_METHOD_RESP;
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ack->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_ACK;
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ib_set_rmpp_flags(&ack->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE);
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spin_lock_irqsave(&rmpp_recv->lock, flags);
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rmpp_recv->last_ack = rmpp_recv->seg_num;
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ack->rmpp_hdr.seg_num = cpu_to_be32(rmpp_recv->seg_num);
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ack->rmpp_hdr.paylen_newwin = cpu_to_be32(rmpp_recv->newwin);
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spin_unlock_irqrestore(&rmpp_recv->lock, flags);
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}
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static void ack_recv(struct mad_rmpp_recv *rmpp_recv,
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struct ib_mad_recv_wc *recv_wc)
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{
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struct ib_mad_send_buf *msg;
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struct ib_send_wr *bad_send_wr;
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int hdr_len, ret;
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hdr_len = sizeof(struct ib_mad_hdr) + sizeof(struct ib_rmpp_hdr);
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msg = ib_create_send_mad(&rmpp_recv->agent->agent, recv_wc->wc->src_qp,
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recv_wc->wc->pkey_index, rmpp_recv->ah, 1,
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hdr_len, sizeof(struct ib_rmpp_mad) - hdr_len,
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GFP_KERNEL);
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if (!msg)
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return;
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format_ack((struct ib_rmpp_mad *) msg->mad,
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(struct ib_rmpp_mad *) recv_wc->recv_buf.mad, rmpp_recv);
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ret = ib_post_send_mad(&rmpp_recv->agent->agent, &msg->send_wr,
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&bad_send_wr);
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if (ret)
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ib_free_send_mad(msg);
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}
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static inline int get_last_flag(struct ib_mad_recv_buf *seg)
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{
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struct ib_rmpp_mad *rmpp_mad;
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rmpp_mad = (struct ib_rmpp_mad *) seg->mad;
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return ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & IB_MGMT_RMPP_FLAG_LAST;
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}
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static inline int get_seg_num(struct ib_mad_recv_buf *seg)
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{
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struct ib_rmpp_mad *rmpp_mad;
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rmpp_mad = (struct ib_rmpp_mad *) seg->mad;
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return be32_to_cpu(rmpp_mad->rmpp_hdr.seg_num);
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}
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static inline struct ib_mad_recv_buf * get_next_seg(struct list_head *rmpp_list,
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struct ib_mad_recv_buf *seg)
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{
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if (seg->list.next == rmpp_list)
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return NULL;
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return container_of(seg->list.next, struct ib_mad_recv_buf, list);
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}
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static inline int window_size(struct ib_mad_agent_private *agent)
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{
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return max(agent->qp_info->recv_queue.max_active >> 3, 1);
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}
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static struct ib_mad_recv_buf * find_seg_location(struct list_head *rmpp_list,
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int seg_num)
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{
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struct ib_mad_recv_buf *seg_buf;
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int cur_seg_num;
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list_for_each_entry_reverse(seg_buf, rmpp_list, list) {
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cur_seg_num = get_seg_num(seg_buf);
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if (seg_num > cur_seg_num)
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return seg_buf;
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if (seg_num == cur_seg_num)
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break;
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}
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return NULL;
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}
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static void update_seg_num(struct mad_rmpp_recv *rmpp_recv,
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struct ib_mad_recv_buf *new_buf)
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{
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struct list_head *rmpp_list = &rmpp_recv->rmpp_wc->rmpp_list;
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while (new_buf && (get_seg_num(new_buf) == rmpp_recv->seg_num + 1)) {
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rmpp_recv->cur_seg_buf = new_buf;
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rmpp_recv->seg_num++;
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new_buf = get_next_seg(rmpp_list, new_buf);
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}
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}
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static inline int get_mad_len(struct mad_rmpp_recv *rmpp_recv)
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{
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|
|
struct ib_rmpp_mad *rmpp_mad;
|
|
|
|
int hdr_size, data_size, pad;
|
|
|
|
|
|
|
|
rmpp_mad = (struct ib_rmpp_mad *)rmpp_recv->cur_seg_buf->mad;
|
|
|
|
|
|
|
|
hdr_size = data_offset(rmpp_mad->mad_hdr.mgmt_class);
|
|
|
|
data_size = sizeof(struct ib_rmpp_mad) - hdr_size;
|
|
|
|
pad = data_size - be32_to_cpu(rmpp_mad->rmpp_hdr.paylen_newwin);
|
|
|
|
if (pad > data_size || pad < 0)
|
|
|
|
pad = 0;
|
|
|
|
|
|
|
|
return hdr_size + rmpp_recv->seg_num * data_size - pad;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct ib_mad_recv_wc * complete_rmpp(struct mad_rmpp_recv *rmpp_recv)
|
|
|
|
{
|
|
|
|
struct ib_mad_recv_wc *rmpp_wc;
|
|
|
|
|
|
|
|
ack_recv(rmpp_recv, rmpp_recv->rmpp_wc);
|
|
|
|
if (rmpp_recv->seg_num > 1)
|
|
|
|
cancel_delayed_work(&rmpp_recv->timeout_work);
|
|
|
|
|
|
|
|
rmpp_wc = rmpp_recv->rmpp_wc;
|
|
|
|
rmpp_wc->mad_len = get_mad_len(rmpp_recv);
|
|
|
|
/* 10 seconds until we can find the packet lifetime */
|
|
|
|
queue_delayed_work(rmpp_recv->agent->qp_info->port_priv->wq,
|
|
|
|
&rmpp_recv->cleanup_work, msecs_to_jiffies(10000));
|
|
|
|
return rmpp_wc;
|
|
|
|
}
|
|
|
|
|
|
|
|
void ib_coalesce_recv_mad(struct ib_mad_recv_wc *mad_recv_wc, void *buf)
|
|
|
|
{
|
|
|
|
struct ib_mad_recv_buf *seg_buf;
|
|
|
|
struct ib_rmpp_mad *rmpp_mad;
|
|
|
|
void *data;
|
|
|
|
int size, len, offset;
|
|
|
|
u8 flags;
|
|
|
|
|
|
|
|
len = mad_recv_wc->mad_len;
|
|
|
|
if (len <= sizeof(struct ib_mad)) {
|
|
|
|
memcpy(buf, mad_recv_wc->recv_buf.mad, len);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
offset = data_offset(mad_recv_wc->recv_buf.mad->mad_hdr.mgmt_class);
|
|
|
|
|
|
|
|
list_for_each_entry(seg_buf, &mad_recv_wc->rmpp_list, list) {
|
|
|
|
rmpp_mad = (struct ib_rmpp_mad *)seg_buf->mad;
|
|
|
|
flags = ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr);
|
|
|
|
|
|
|
|
if (flags & IB_MGMT_RMPP_FLAG_FIRST) {
|
|
|
|
data = rmpp_mad;
|
|
|
|
size = sizeof(*rmpp_mad);
|
|
|
|
} else {
|
|
|
|
data = (void *) rmpp_mad + offset;
|
|
|
|
if (flags & IB_MGMT_RMPP_FLAG_LAST)
|
|
|
|
size = len;
|
|
|
|
else
|
|
|
|
size = sizeof(*rmpp_mad) - offset;
|
|
|
|
}
|
|
|
|
|
|
|
|
memcpy(buf, data, size);
|
|
|
|
len -= size;
|
|
|
|
buf += size;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(ib_coalesce_recv_mad);
|
|
|
|
|
|
|
|
static struct ib_mad_recv_wc *
|
|
|
|
continue_rmpp(struct ib_mad_agent_private *agent,
|
|
|
|
struct ib_mad_recv_wc *mad_recv_wc)
|
|
|
|
{
|
|
|
|
struct mad_rmpp_recv *rmpp_recv;
|
|
|
|
struct ib_mad_recv_buf *prev_buf;
|
|
|
|
struct ib_mad_recv_wc *done_wc;
|
|
|
|
int seg_num;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
rmpp_recv = acquire_rmpp_recv(agent, mad_recv_wc);
|
|
|
|
if (!rmpp_recv)
|
|
|
|
goto drop1;
|
|
|
|
|
|
|
|
seg_num = get_seg_num(&mad_recv_wc->recv_buf);
|
|
|
|
|
|
|
|
spin_lock_irqsave(&rmpp_recv->lock, flags);
|
|
|
|
if ((rmpp_recv->state == RMPP_STATE_TIMEOUT) ||
|
|
|
|
(seg_num > rmpp_recv->newwin))
|
|
|
|
goto drop3;
|
|
|
|
|
|
|
|
if ((seg_num <= rmpp_recv->last_ack) ||
|
|
|
|
(rmpp_recv->state == RMPP_STATE_COMPLETE)) {
|
|
|
|
spin_unlock_irqrestore(&rmpp_recv->lock, flags);
|
|
|
|
ack_recv(rmpp_recv, mad_recv_wc);
|
|
|
|
goto drop2;
|
|
|
|
}
|
|
|
|
|
|
|
|
prev_buf = find_seg_location(&rmpp_recv->rmpp_wc->rmpp_list, seg_num);
|
|
|
|
if (!prev_buf)
|
|
|
|
goto drop3;
|
|
|
|
|
|
|
|
done_wc = NULL;
|
|
|
|
list_add(&mad_recv_wc->recv_buf.list, &prev_buf->list);
|
|
|
|
if (rmpp_recv->cur_seg_buf == prev_buf) {
|
|
|
|
update_seg_num(rmpp_recv, &mad_recv_wc->recv_buf);
|
|
|
|
if (get_last_flag(rmpp_recv->cur_seg_buf)) {
|
|
|
|
rmpp_recv->state = RMPP_STATE_COMPLETE;
|
|
|
|
spin_unlock_irqrestore(&rmpp_recv->lock, flags);
|
|
|
|
done_wc = complete_rmpp(rmpp_recv);
|
|
|
|
goto out;
|
|
|
|
} else if (rmpp_recv->seg_num == rmpp_recv->newwin) {
|
|
|
|
rmpp_recv->newwin += window_size(agent);
|
|
|
|
spin_unlock_irqrestore(&rmpp_recv->lock, flags);
|
|
|
|
ack_recv(rmpp_recv, mad_recv_wc);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
spin_unlock_irqrestore(&rmpp_recv->lock, flags);
|
|
|
|
out:
|
|
|
|
deref_rmpp_recv(rmpp_recv);
|
|
|
|
return done_wc;
|
|
|
|
|
|
|
|
drop3: spin_unlock_irqrestore(&rmpp_recv->lock, flags);
|
|
|
|
drop2: deref_rmpp_recv(rmpp_recv);
|
|
|
|
drop1: ib_free_recv_mad(mad_recv_wc);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct ib_mad_recv_wc *
|
|
|
|
start_rmpp(struct ib_mad_agent_private *agent,
|
|
|
|
struct ib_mad_recv_wc *mad_recv_wc)
|
|
|
|
{
|
|
|
|
struct mad_rmpp_recv *rmpp_recv;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
rmpp_recv = create_rmpp_recv(agent, mad_recv_wc);
|
|
|
|
if (!rmpp_recv) {
|
|
|
|
ib_free_recv_mad(mad_recv_wc);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
spin_lock_irqsave(&agent->lock, flags);
|
|
|
|
if (insert_rmpp_recv(agent, rmpp_recv)) {
|
|
|
|
spin_unlock_irqrestore(&agent->lock, flags);
|
|
|
|
/* duplicate first MAD */
|
|
|
|
destroy_rmpp_recv(rmpp_recv);
|
|
|
|
return continue_rmpp(agent, mad_recv_wc);
|
|
|
|
}
|
|
|
|
atomic_inc(&rmpp_recv->refcount);
|
|
|
|
|
|
|
|
if (get_last_flag(&mad_recv_wc->recv_buf)) {
|
|
|
|
rmpp_recv->state = RMPP_STATE_COMPLETE;
|
|
|
|
spin_unlock_irqrestore(&agent->lock, flags);
|
|
|
|
complete_rmpp(rmpp_recv);
|
|
|
|
} else {
|
|
|
|
spin_unlock_irqrestore(&agent->lock, flags);
|
|
|
|
/* 40 seconds until we can find the packet lifetimes */
|
|
|
|
queue_delayed_work(agent->qp_info->port_priv->wq,
|
|
|
|
&rmpp_recv->timeout_work,
|
|
|
|
msecs_to_jiffies(40000));
|
|
|
|
rmpp_recv->newwin += window_size(agent);
|
|
|
|
ack_recv(rmpp_recv, mad_recv_wc);
|
|
|
|
mad_recv_wc = NULL;
|
|
|
|
}
|
|
|
|
deref_rmpp_recv(rmpp_recv);
|
|
|
|
return mad_recv_wc;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline u64 get_seg_addr(struct ib_mad_send_wr_private *mad_send_wr)
|
|
|
|
{
|
|
|
|
return mad_send_wr->sg_list[0].addr + mad_send_wr->data_offset +
|
|
|
|
(sizeof(struct ib_rmpp_mad) - mad_send_wr->data_offset) *
|
|
|
|
(mad_send_wr->seg_num - 1);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int send_next_seg(struct ib_mad_send_wr_private *mad_send_wr)
|
|
|
|
{
|
|
|
|
struct ib_rmpp_mad *rmpp_mad;
|
|
|
|
int timeout;
|
|
|
|
|
|
|
|
rmpp_mad = (struct ib_rmpp_mad *)mad_send_wr->send_wr.wr.ud.mad_hdr;
|
|
|
|
ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE);
|
|
|
|
rmpp_mad->rmpp_hdr.seg_num = cpu_to_be32(mad_send_wr->seg_num);
|
|
|
|
|
|
|
|
if (mad_send_wr->seg_num == 1) {
|
|
|
|
rmpp_mad->rmpp_hdr.rmpp_rtime_flags |= IB_MGMT_RMPP_FLAG_FIRST;
|
|
|
|
rmpp_mad->rmpp_hdr.paylen_newwin =
|
|
|
|
cpu_to_be32(mad_send_wr->total_seg *
|
|
|
|
(sizeof(struct ib_rmpp_mad) -
|
|
|
|
offsetof(struct ib_rmpp_mad, data)));
|
|
|
|
mad_send_wr->sg_list[0].length = sizeof(struct ib_rmpp_mad);
|
|
|
|
} else {
|
|
|
|
mad_send_wr->send_wr.num_sge = 2;
|
|
|
|
mad_send_wr->sg_list[0].length = mad_send_wr->data_offset;
|
|
|
|
mad_send_wr->sg_list[1].addr = get_seg_addr(mad_send_wr);
|
|
|
|
mad_send_wr->sg_list[1].length = sizeof(struct ib_rmpp_mad) -
|
|
|
|
mad_send_wr->data_offset;
|
|
|
|
mad_send_wr->sg_list[1].lkey = mad_send_wr->sg_list[0].lkey;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (mad_send_wr->seg_num == mad_send_wr->total_seg) {
|
|
|
|
rmpp_mad->rmpp_hdr.rmpp_rtime_flags |= IB_MGMT_RMPP_FLAG_LAST;
|
|
|
|
rmpp_mad->rmpp_hdr.paylen_newwin =
|
|
|
|
cpu_to_be32(sizeof(struct ib_rmpp_mad) -
|
|
|
|
offsetof(struct ib_rmpp_mad, data) -
|
|
|
|
mad_send_wr->pad);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* 2 seconds for an ACK until we can find the packet lifetime */
|
|
|
|
timeout = mad_send_wr->send_wr.wr.ud.timeout_ms;
|
|
|
|
if (!timeout || timeout > 2000)
|
|
|
|
mad_send_wr->timeout = msecs_to_jiffies(2000);
|
|
|
|
mad_send_wr->seg_num++;
|
|
|
|
return ib_send_mad(mad_send_wr);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void process_rmpp_ack(struct ib_mad_agent_private *agent,
|
|
|
|
struct ib_mad_recv_wc *mad_recv_wc)
|
|
|
|
{
|
|
|
|
struct ib_mad_send_wr_private *mad_send_wr;
|
|
|
|
struct ib_rmpp_mad *rmpp_mad;
|
|
|
|
unsigned long flags;
|
|
|
|
int seg_num, newwin, ret;
|
|
|
|
|
|
|
|
rmpp_mad = (struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad;
|
|
|
|
if (rmpp_mad->rmpp_hdr.rmpp_status)
|
|
|
|
return;
|
|
|
|
|
|
|
|
seg_num = be32_to_cpu(rmpp_mad->rmpp_hdr.seg_num);
|
|
|
|
newwin = be32_to_cpu(rmpp_mad->rmpp_hdr.paylen_newwin);
|
|
|
|
|
|
|
|
spin_lock_irqsave(&agent->lock, flags);
|
|
|
|
mad_send_wr = ib_find_send_mad(agent, rmpp_mad->mad_hdr.tid);
|
|
|
|
if (!mad_send_wr)
|
|
|
|
goto out; /* Unmatched ACK */
|
|
|
|
|
|
|
|
if ((mad_send_wr->last_ack == mad_send_wr->total_seg) ||
|
|
|
|
(!mad_send_wr->timeout) || (mad_send_wr->status != IB_WC_SUCCESS))
|
|
|
|
goto out; /* Send is already done */
|
|
|
|
|
|
|
|
if (seg_num > mad_send_wr->total_seg)
|
|
|
|
goto out; /* Bad ACK */
|
|
|
|
|
|
|
|
if (newwin < mad_send_wr->newwin || seg_num < mad_send_wr->last_ack)
|
|
|
|
goto out; /* Old ACK */
|
|
|
|
|
|
|
|
if (seg_num > mad_send_wr->last_ack) {
|
|
|
|
mad_send_wr->last_ack = seg_num;
|
|
|
|
mad_send_wr->retries = mad_send_wr->send_wr.wr.ud.retries;
|
|
|
|
}
|
|
|
|
mad_send_wr->newwin = newwin;
|
|
|
|
if (mad_send_wr->last_ack == mad_send_wr->total_seg) {
|
|
|
|
/* If no response is expected, the ACK completes the send */
|
|
|
|
if (!mad_send_wr->send_wr.wr.ud.timeout_ms) {
|
|
|
|
struct ib_mad_send_wc wc;
|
|
|
|
|
|
|
|
ib_mark_mad_done(mad_send_wr);
|
|
|
|
spin_unlock_irqrestore(&agent->lock, flags);
|
|
|
|
|
|
|
|
wc.status = IB_WC_SUCCESS;
|
|
|
|
wc.vendor_err = 0;
|
|
|
|
wc.wr_id = mad_send_wr->wr_id;
|
|
|
|
ib_mad_complete_send_wr(mad_send_wr, &wc);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
if (mad_send_wr->refcount == 1)
|
|
|
|
ib_reset_mad_timeout(mad_send_wr, mad_send_wr->
|
|
|
|
send_wr.wr.ud.timeout_ms);
|
|
|
|
} else if (mad_send_wr->refcount == 1 &&
|
|
|
|
mad_send_wr->seg_num < mad_send_wr->newwin &&
|
|
|
|
mad_send_wr->seg_num <= mad_send_wr->total_seg) {
|
|
|
|
/* Send failure will just result in a timeout/retry */
|
|
|
|
ret = send_next_seg(mad_send_wr);
|
|
|
|
if (ret)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
mad_send_wr->refcount++;
|
|
|
|
list_del(&mad_send_wr->agent_list);
|
|
|
|
list_add_tail(&mad_send_wr->agent_list,
|
|
|
|
&mad_send_wr->mad_agent_priv->send_list);
|
|
|
|
}
|
|
|
|
out:
|
|
|
|
spin_unlock_irqrestore(&agent->lock, flags);
|
|
|
|
}
|
|
|
|
|
|
|
|
struct ib_mad_recv_wc *
|
|
|
|
ib_process_rmpp_recv_wc(struct ib_mad_agent_private *agent,
|
|
|
|
struct ib_mad_recv_wc *mad_recv_wc)
|
|
|
|
{
|
|
|
|
struct ib_rmpp_mad *rmpp_mad;
|
|
|
|
|
|
|
|
rmpp_mad = (struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad;
|
|
|
|
if (!(rmpp_mad->rmpp_hdr.rmpp_rtime_flags & IB_MGMT_RMPP_FLAG_ACTIVE))
|
|
|
|
return mad_recv_wc;
|
|
|
|
|
|
|
|
if (rmpp_mad->rmpp_hdr.rmpp_version != IB_MGMT_RMPP_VERSION)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
switch (rmpp_mad->rmpp_hdr.rmpp_type) {
|
|
|
|
case IB_MGMT_RMPP_TYPE_DATA:
|
|
|
|
if (rmpp_mad->rmpp_hdr.seg_num == __constant_htonl(1))
|
|
|
|
return start_rmpp(agent, mad_recv_wc);
|
|
|
|
else
|
|
|
|
return continue_rmpp(agent, mad_recv_wc);
|
|
|
|
case IB_MGMT_RMPP_TYPE_ACK:
|
|
|
|
process_rmpp_ack(agent, mad_recv_wc);
|
|
|
|
break;
|
|
|
|
case IB_MGMT_RMPP_TYPE_STOP:
|
|
|
|
case IB_MGMT_RMPP_TYPE_ABORT:
|
|
|
|
/* TODO: process_rmpp_nack(agent, mad_recv_wc); */
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
out:
|
|
|
|
ib_free_recv_mad(mad_recv_wc);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
int ib_send_rmpp_mad(struct ib_mad_send_wr_private *mad_send_wr)
|
|
|
|
{
|
|
|
|
struct ib_rmpp_mad *rmpp_mad;
|
|
|
|
int i, total_len, ret;
|
|
|
|
|
|
|
|
rmpp_mad = (struct ib_rmpp_mad *)mad_send_wr->send_wr.wr.ud.mad_hdr;
|
|
|
|
if (!(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) &
|
|
|
|
IB_MGMT_RMPP_FLAG_ACTIVE))
|
|
|
|
return IB_RMPP_RESULT_UNHANDLED;
|
|
|
|
|
|
|
|
if (rmpp_mad->rmpp_hdr.rmpp_type != IB_MGMT_RMPP_TYPE_DATA)
|
|
|
|
return IB_RMPP_RESULT_INTERNAL;
|
|
|
|
|
|
|
|
if (mad_send_wr->send_wr.num_sge > 1)
|
|
|
|
return -EINVAL; /* TODO: support num_sge > 1 */
|
|
|
|
|
|
|
|
mad_send_wr->seg_num = 1;
|
|
|
|
mad_send_wr->newwin = 1;
|
|
|
|
mad_send_wr->data_offset = data_offset(rmpp_mad->mad_hdr.mgmt_class);
|
|
|
|
|
|
|
|
total_len = 0;
|
|
|
|
for (i = 0; i < mad_send_wr->send_wr.num_sge; i++)
|
|
|
|
total_len += mad_send_wr->send_wr.sg_list[i].length;
|
|
|
|
|
|
|
|
mad_send_wr->total_seg = (total_len - mad_send_wr->data_offset) /
|
|
|
|
(sizeof(struct ib_rmpp_mad) - mad_send_wr->data_offset);
|
|
|
|
mad_send_wr->pad = total_len - offsetof(struct ib_rmpp_mad, data) -
|
|
|
|
be32_to_cpu(rmpp_mad->rmpp_hdr.paylen_newwin);
|
|
|
|
|
|
|
|
/* We need to wait for the final ACK even if there isn't a response */
|
|
|
|
mad_send_wr->refcount += (mad_send_wr->timeout == 0);
|
|
|
|
ret = send_next_seg(mad_send_wr);
|
|
|
|
if (!ret)
|
|
|
|
return IB_RMPP_RESULT_CONSUMED;
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
int ib_process_rmpp_send_wc(struct ib_mad_send_wr_private *mad_send_wr,
|
|
|
|
struct ib_mad_send_wc *mad_send_wc)
|
|
|
|
{
|
|
|
|
struct ib_rmpp_mad *rmpp_mad;
|
|
|
|
struct ib_mad_send_buf *msg;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
rmpp_mad = (struct ib_rmpp_mad *)mad_send_wr->send_wr.wr.ud.mad_hdr;
|
|
|
|
if (!(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) &
|
|
|
|
IB_MGMT_RMPP_FLAG_ACTIVE))
|
|
|
|
return IB_RMPP_RESULT_UNHANDLED; /* RMPP not active */
|
|
|
|
|
|
|
|
if (rmpp_mad->rmpp_hdr.rmpp_type != IB_MGMT_RMPP_TYPE_DATA) {
|
|
|
|
msg = (struct ib_mad_send_buf *) (unsigned long)
|
|
|
|
mad_send_wc->wr_id;
|
|
|
|
ib_free_send_mad(msg);
|
|
|
|
return IB_RMPP_RESULT_INTERNAL; /* ACK, STOP, or ABORT */
|
|
|
|
}
|
|
|
|
|
|
|
|
if (mad_send_wc->status != IB_WC_SUCCESS ||
|
|
|
|
mad_send_wr->status != IB_WC_SUCCESS)
|
|
|
|
return IB_RMPP_RESULT_PROCESSED; /* Canceled or send error */
|
|
|
|
|
|
|
|
if (!mad_send_wr->timeout)
|
|
|
|
return IB_RMPP_RESULT_PROCESSED; /* Response received */
|
|
|
|
|
|
|
|
if (mad_send_wr->last_ack == mad_send_wr->total_seg) {
|
|
|
|
mad_send_wr->timeout =
|
|
|
|
msecs_to_jiffies(mad_send_wr->send_wr.wr.ud.timeout_ms);
|
|
|
|
return IB_RMPP_RESULT_PROCESSED; /* Send done */
|
|
|
|
}
|
|
|
|
|
|
|
|
if (mad_send_wr->seg_num > mad_send_wr->newwin ||
|
|
|
|
mad_send_wr->seg_num > mad_send_wr->total_seg)
|
|
|
|
return IB_RMPP_RESULT_PROCESSED; /* Wait for ACK */
|
|
|
|
|
|
|
|
ret = send_next_seg(mad_send_wr);
|
|
|
|
if (ret) {
|
|
|
|
mad_send_wc->status = IB_WC_GENERAL_ERR;
|
|
|
|
return IB_RMPP_RESULT_PROCESSED;
|
|
|
|
}
|
|
|
|
return IB_RMPP_RESULT_CONSUMED;
|
|
|
|
}
|
|
|
|
|
|
|
|
int ib_retry_rmpp(struct ib_mad_send_wr_private *mad_send_wr)
|
|
|
|
{
|
|
|
|
struct ib_rmpp_mad *rmpp_mad;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
rmpp_mad = (struct ib_rmpp_mad *)mad_send_wr->send_wr.wr.ud.mad_hdr;
|
|
|
|
if (!(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) &
|
|
|
|
IB_MGMT_RMPP_FLAG_ACTIVE))
|
|
|
|
return IB_RMPP_RESULT_UNHANDLED; /* RMPP not active */
|
|
|
|
|
|
|
|
if (mad_send_wr->last_ack == mad_send_wr->total_seg)
|
|
|
|
return IB_RMPP_RESULT_PROCESSED;
|
|
|
|
|
|
|
|
mad_send_wr->seg_num = mad_send_wr->last_ack + 1;
|
|
|
|
ret = send_next_seg(mad_send_wr);
|
|
|
|
if (ret)
|
|
|
|
return IB_RMPP_RESULT_PROCESSED;
|
|
|
|
|
|
|
|
return IB_RMPP_RESULT_CONSUMED;
|
|
|
|
}
|