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960 lines
28 KiB
960 lines
28 KiB
/* |
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* Copyright (c) 2005 Intel Inc. All rights reserved. |
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* Copyright (c) 2005-2006 Voltaire, Inc. All rights reserved. |
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* Copyright (c) 2014 Intel Corporation. All rights reserved. |
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* |
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* This software is available to you under a choice of one of two |
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* licenses. You may choose to be licensed under the terms of the GNU |
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* General Public License (GPL) Version 2, available from the file |
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* COPYING in the main directory of this source tree, or the |
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* OpenIB.org BSD license below: |
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* |
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* Redistribution and use in source and binary forms, with or |
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* without modification, are permitted provided that the following |
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* conditions are met: |
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* |
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* - Redistributions of source code must retain the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer. |
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* |
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* - Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer in the documentation and/or other materials |
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* provided with the distribution. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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*/ |
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#include <linux/slab.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 delayed_work timeout_work; |
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struct delayed_work cleanup_work; |
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struct completion comp; |
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enum rmpp_state state; |
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spinlock_t lock; |
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refcount_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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int repwin; |
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__be64 tid; |
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u32 src_qp; |
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u32 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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u8 base_version; |
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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 (refcount_dec_and_test(&rmpp_recv->refcount)) |
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complete(&rmpp_recv->comp); |
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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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deref_rmpp_recv(rmpp_recv); |
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wait_for_completion(&rmpp_recv->comp); |
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rdma_destroy_ah(rmpp_recv->ah, RDMA_DESTROY_AH_SLEEPABLE); |
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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 format_ack(struct ib_mad_send_buf *msg, |
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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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struct ib_rmpp_mad *ack = msg->mad; |
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unsigned long flags; |
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memcpy(ack, &data->mad_hdr, msg->hdr_len); |
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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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int ret, hdr_len; |
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hdr_len = ib_get_mad_data_offset(recv_wc->recv_buf.mad->mad_hdr.mgmt_class); |
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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, 1, hdr_len, |
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0, GFP_KERNEL, |
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IB_MGMT_BASE_VERSION); |
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if (IS_ERR(msg)) |
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return; |
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format_ack(msg, (struct ib_rmpp_mad *) recv_wc->recv_buf.mad, rmpp_recv); |
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msg->ah = rmpp_recv->ah; |
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ret = ib_post_send_mad(msg, NULL); |
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if (ret) |
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ib_free_send_mad(msg); |
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} |
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static struct ib_mad_send_buf *alloc_response_msg(struct ib_mad_agent *agent, |
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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_ah *ah; |
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int hdr_len; |
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ah = ib_create_ah_from_wc(agent->qp->pd, recv_wc->wc, |
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recv_wc->recv_buf.grh, agent->port_num); |
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if (IS_ERR(ah)) |
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return (void *) ah; |
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hdr_len = ib_get_mad_data_offset(recv_wc->recv_buf.mad->mad_hdr.mgmt_class); |
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msg = ib_create_send_mad(agent, recv_wc->wc->src_qp, |
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recv_wc->wc->pkey_index, 1, |
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hdr_len, 0, GFP_KERNEL, |
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IB_MGMT_BASE_VERSION); |
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if (IS_ERR(msg)) |
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rdma_destroy_ah(ah, RDMA_DESTROY_AH_SLEEPABLE); |
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else { |
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msg->ah = ah; |
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msg->context[0] = ah; |
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} |
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return msg; |
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} |
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static void ack_ds_ack(struct ib_mad_agent_private *agent, |
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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_rmpp_mad *rmpp_mad; |
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int ret; |
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msg = alloc_response_msg(&agent->agent, recv_wc); |
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if (IS_ERR(msg)) |
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return; |
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rmpp_mad = msg->mad; |
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memcpy(rmpp_mad, recv_wc->recv_buf.mad, msg->hdr_len); |
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rmpp_mad->mad_hdr.method ^= IB_MGMT_METHOD_RESP; |
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ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); |
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rmpp_mad->rmpp_hdr.seg_num = 0; |
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rmpp_mad->rmpp_hdr.paylen_newwin = cpu_to_be32(1); |
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ret = ib_post_send_mad(msg, NULL); |
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if (ret) { |
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rdma_destroy_ah(msg->ah, RDMA_DESTROY_AH_SLEEPABLE); |
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ib_free_send_mad(msg); |
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} |
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} |
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void ib_rmpp_send_handler(struct ib_mad_send_wc *mad_send_wc) |
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{ |
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if (mad_send_wc->send_buf->context[0] == mad_send_wc->send_buf->ah) |
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rdma_destroy_ah(mad_send_wc->send_buf->ah, |
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RDMA_DESTROY_AH_SLEEPABLE); |
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ib_free_send_mad(mad_send_wc->send_buf); |
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} |
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static void nack_recv(struct ib_mad_agent_private *agent, |
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struct ib_mad_recv_wc *recv_wc, u8 rmpp_status) |
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{ |
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struct ib_mad_send_buf *msg; |
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struct ib_rmpp_mad *rmpp_mad; |
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int ret; |
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msg = alloc_response_msg(&agent->agent, recv_wc); |
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if (IS_ERR(msg)) |
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return; |
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rmpp_mad = msg->mad; |
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memcpy(rmpp_mad, recv_wc->recv_buf.mad, msg->hdr_len); |
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rmpp_mad->mad_hdr.method ^= IB_MGMT_METHOD_RESP; |
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rmpp_mad->rmpp_hdr.rmpp_version = IB_MGMT_RMPP_VERSION; |
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rmpp_mad->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_ABORT; |
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ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); |
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rmpp_mad->rmpp_hdr.rmpp_status = rmpp_status; |
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rmpp_mad->rmpp_hdr.seg_num = 0; |
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rmpp_mad->rmpp_hdr.paylen_newwin = 0; |
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ret = ib_post_send_mad(msg, NULL); |
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if (ret) { |
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rdma_destroy_ah(msg->ah, RDMA_DESTROY_AH_SLEEPABLE); |
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ib_free_send_mad(msg); |
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} |
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} |
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static void recv_timeout_handler(struct work_struct *work) |
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{ |
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struct mad_rmpp_recv *rmpp_recv = |
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container_of(work, struct mad_rmpp_recv, timeout_work.work); |
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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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rmpp_wc = rmpp_recv->rmpp_wc; |
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nack_recv(rmpp_recv->agent, rmpp_wc, IB_MGMT_RMPP_STATUS_T2L); |
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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(struct work_struct *work) |
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{ |
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struct mad_rmpp_recv *rmpp_recv = |
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container_of(work, struct mad_rmpp_recv, cleanup_work.work); |
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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_completion(&rmpp_recv->comp); |
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INIT_DELAYED_WORK(&rmpp_recv->timeout_work, recv_timeout_handler); |
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INIT_DELAYED_WORK(&rmpp_recv->cleanup_work, recv_cleanup_handler); |
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spin_lock_init(&rmpp_recv->lock); |
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rmpp_recv->state = RMPP_STATE_ACTIVE; |
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refcount_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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rmpp_recv->repwin = 1; |
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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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rmpp_recv->base_version = mad_hdr->base_version; |
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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 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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refcount_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 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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|
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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; |
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int hdr_size, data_size, pad; |
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bool opa = rdma_cap_opa_mad(rmpp_recv->agent->qp_info->port_priv->device, |
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rmpp_recv->agent->qp_info->port_priv->port_num); |
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rmpp_mad = (struct ib_rmpp_mad *)rmpp_recv->cur_seg_buf->mad; |
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hdr_size = ib_get_mad_data_offset(rmpp_mad->mad_hdr.mgmt_class); |
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if (opa && rmpp_recv->base_version == OPA_MGMT_BASE_VERSION) { |
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data_size = sizeof(struct opa_rmpp_mad) - hdr_size; |
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pad = OPA_MGMT_RMPP_DATA - be32_to_cpu(rmpp_mad->rmpp_hdr.paylen_newwin); |
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if (pad > OPA_MGMT_RMPP_DATA || pad < 0) |
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pad = 0; |
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} else { |
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data_size = sizeof(struct ib_rmpp_mad) - hdr_size; |
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pad = IB_MGMT_RMPP_DATA - be32_to_cpu(rmpp_mad->rmpp_hdr.paylen_newwin); |
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if (pad > IB_MGMT_RMPP_DATA || pad < 0) |
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pad = 0; |
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} |
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return hdr_size + rmpp_recv->seg_num * data_size - pad; |
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} |
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static struct ib_mad_recv_wc * complete_rmpp(struct mad_rmpp_recv *rmpp_recv) |
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{ |
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struct ib_mad_recv_wc *rmpp_wc; |
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ack_recv(rmpp_recv, rmpp_recv->rmpp_wc); |
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if (rmpp_recv->seg_num > 1) |
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cancel_delayed_work(&rmpp_recv->timeout_work); |
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rmpp_wc = rmpp_recv->rmpp_wc; |
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rmpp_wc->mad_len = get_mad_len(rmpp_recv); |
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/* 10 seconds until we can find the packet lifetime */ |
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queue_delayed_work(rmpp_recv->agent->qp_info->port_priv->wq, |
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&rmpp_recv->cleanup_work, msecs_to_jiffies(10000)); |
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return rmpp_wc; |
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} |
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static struct ib_mad_recv_wc * |
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continue_rmpp(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_recv_buf *prev_buf; |
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struct ib_mad_recv_wc *done_wc; |
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int seg_num; |
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unsigned long flags; |
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rmpp_recv = acquire_rmpp_recv(agent, mad_recv_wc); |
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if (!rmpp_recv) |
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goto drop1; |
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seg_num = get_seg_num(&mad_recv_wc->recv_buf); |
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|
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spin_lock_irqsave(&rmpp_recv->lock, flags); |
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if ((rmpp_recv->state == RMPP_STATE_TIMEOUT) || |
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(seg_num > rmpp_recv->newwin)) |
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goto drop3; |
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|
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if ((seg_num <= rmpp_recv->last_ack) || |
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(rmpp_recv->state == RMPP_STATE_COMPLETE)) { |
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spin_unlock_irqrestore(&rmpp_recv->lock, flags); |
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ack_recv(rmpp_recv, mad_recv_wc); |
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goto drop2; |
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} |
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|
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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); |
|
} |
|
refcount_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 int send_next_seg(struct ib_mad_send_wr_private *mad_send_wr) |
|
{ |
|
struct ib_rmpp_mad *rmpp_mad; |
|
int timeout; |
|
u32 paylen = 0; |
|
|
|
rmpp_mad = mad_send_wr->send_buf.mad; |
|
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; |
|
paylen = (mad_send_wr->send_buf.seg_count * |
|
mad_send_wr->send_buf.seg_rmpp_size) - |
|
mad_send_wr->pad; |
|
} |
|
|
|
if (mad_send_wr->seg_num == mad_send_wr->send_buf.seg_count) { |
|
rmpp_mad->rmpp_hdr.rmpp_rtime_flags |= IB_MGMT_RMPP_FLAG_LAST; |
|
paylen = mad_send_wr->send_buf.seg_rmpp_size - mad_send_wr->pad; |
|
} |
|
rmpp_mad->rmpp_hdr.paylen_newwin = cpu_to_be32(paylen); |
|
|
|
/* 2 seconds for an ACK until we can find the packet lifetime */ |
|
timeout = mad_send_wr->send_buf.timeout_ms; |
|
if (!timeout || timeout > 2000) |
|
mad_send_wr->timeout = msecs_to_jiffies(2000); |
|
|
|
return ib_send_mad(mad_send_wr); |
|
} |
|
|
|
static void abort_send(struct ib_mad_agent_private *agent, |
|
struct ib_mad_recv_wc *mad_recv_wc, u8 rmpp_status) |
|
{ |
|
struct ib_mad_send_wr_private *mad_send_wr; |
|
struct ib_mad_send_wc wc; |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&agent->lock, flags); |
|
mad_send_wr = ib_find_send_mad(agent, mad_recv_wc); |
|
if (!mad_send_wr) |
|
goto out; /* Unmatched send */ |
|
|
|
if ((mad_send_wr->last_ack == mad_send_wr->send_buf.seg_count) || |
|
(!mad_send_wr->timeout) || (mad_send_wr->status != IB_WC_SUCCESS)) |
|
goto out; /* Send is already done */ |
|
|
|
ib_mark_mad_done(mad_send_wr); |
|
spin_unlock_irqrestore(&agent->lock, flags); |
|
|
|
wc.status = IB_WC_REM_ABORT_ERR; |
|
wc.vendor_err = rmpp_status; |
|
wc.send_buf = &mad_send_wr->send_buf; |
|
ib_mad_complete_send_wr(mad_send_wr, &wc); |
|
return; |
|
out: |
|
spin_unlock_irqrestore(&agent->lock, flags); |
|
} |
|
|
|
static inline void adjust_last_ack(struct ib_mad_send_wr_private *wr, |
|
int seg_num) |
|
{ |
|
struct list_head *list; |
|
|
|
wr->last_ack = seg_num; |
|
list = &wr->last_ack_seg->list; |
|
list_for_each_entry(wr->last_ack_seg, list, list) |
|
if (wr->last_ack_seg->num == seg_num) |
|
break; |
|
} |
|
|
|
static void process_ds_ack(struct ib_mad_agent_private *agent, |
|
struct ib_mad_recv_wc *mad_recv_wc, int newwin) |
|
{ |
|
struct mad_rmpp_recv *rmpp_recv; |
|
|
|
rmpp_recv = find_rmpp_recv(agent, mad_recv_wc); |
|
if (rmpp_recv && rmpp_recv->state == RMPP_STATE_COMPLETE) |
|
rmpp_recv->repwin = newwin; |
|
} |
|
|
|
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) { |
|
abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
|
nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
|
return; |
|
} |
|
|
|
seg_num = be32_to_cpu(rmpp_mad->rmpp_hdr.seg_num); |
|
newwin = be32_to_cpu(rmpp_mad->rmpp_hdr.paylen_newwin); |
|
if (newwin < seg_num) { |
|
abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_W2S); |
|
nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_W2S); |
|
return; |
|
} |
|
|
|
spin_lock_irqsave(&agent->lock, flags); |
|
mad_send_wr = ib_find_send_mad(agent, mad_recv_wc); |
|
if (!mad_send_wr) { |
|
if (!seg_num) |
|
process_ds_ack(agent, mad_recv_wc, newwin); |
|
goto out; /* Unmatched or DS RMPP ACK */ |
|
} |
|
|
|
if ((mad_send_wr->last_ack == mad_send_wr->send_buf.seg_count) && |
|
(mad_send_wr->timeout)) { |
|
spin_unlock_irqrestore(&agent->lock, flags); |
|
ack_ds_ack(agent, mad_recv_wc); |
|
return; /* Repeated ACK for DS RMPP transaction */ |
|
} |
|
|
|
if ((mad_send_wr->last_ack == mad_send_wr->send_buf.seg_count) || |
|
(!mad_send_wr->timeout) || (mad_send_wr->status != IB_WC_SUCCESS)) |
|
goto out; /* Send is already done */ |
|
|
|
if (seg_num > mad_send_wr->send_buf.seg_count || |
|
seg_num > mad_send_wr->newwin) { |
|
spin_unlock_irqrestore(&agent->lock, flags); |
|
abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_S2B); |
|
nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_S2B); |
|
return; |
|
} |
|
|
|
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) { |
|
adjust_last_ack(mad_send_wr, seg_num); |
|
mad_send_wr->retries_left = mad_send_wr->max_retries; |
|
} |
|
mad_send_wr->newwin = newwin; |
|
if (mad_send_wr->last_ack == mad_send_wr->send_buf.seg_count) { |
|
/* If no response is expected, the ACK completes the send */ |
|
if (!mad_send_wr->send_buf.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.send_buf = &mad_send_wr->send_buf; |
|
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_buf.timeout_ms); |
|
spin_unlock_irqrestore(&agent->lock, flags); |
|
ack_ds_ack(agent, mad_recv_wc); |
|
return; |
|
} else if (mad_send_wr->refcount == 1 && |
|
mad_send_wr->seg_num < mad_send_wr->newwin && |
|
mad_send_wr->seg_num < mad_send_wr->send_buf.seg_count) { |
|
/* 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_move_tail(&mad_send_wr->agent_list, |
|
&mad_send_wr->mad_agent_priv->send_list); |
|
} |
|
out: |
|
spin_unlock_irqrestore(&agent->lock, flags); |
|
} |
|
|
|
static struct ib_mad_recv_wc * |
|
process_rmpp_data(struct ib_mad_agent_private *agent, |
|
struct ib_mad_recv_wc *mad_recv_wc) |
|
{ |
|
struct ib_rmpp_hdr *rmpp_hdr; |
|
u8 rmpp_status; |
|
|
|
rmpp_hdr = &((struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad)->rmpp_hdr; |
|
|
|
if (rmpp_hdr->rmpp_status) { |
|
rmpp_status = IB_MGMT_RMPP_STATUS_BAD_STATUS; |
|
goto bad; |
|
} |
|
|
|
if (rmpp_hdr->seg_num == cpu_to_be32(1)) { |
|
if (!(ib_get_rmpp_flags(rmpp_hdr) & IB_MGMT_RMPP_FLAG_FIRST)) { |
|
rmpp_status = IB_MGMT_RMPP_STATUS_BAD_SEG; |
|
goto bad; |
|
} |
|
return start_rmpp(agent, mad_recv_wc); |
|
} else { |
|
if (ib_get_rmpp_flags(rmpp_hdr) & IB_MGMT_RMPP_FLAG_FIRST) { |
|
rmpp_status = IB_MGMT_RMPP_STATUS_BAD_SEG; |
|
goto bad; |
|
} |
|
return continue_rmpp(agent, mad_recv_wc); |
|
} |
|
bad: |
|
nack_recv(agent, mad_recv_wc, rmpp_status); |
|
ib_free_recv_mad(mad_recv_wc); |
|
return NULL; |
|
} |
|
|
|
static void process_rmpp_stop(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_status != IB_MGMT_RMPP_STATUS_RESX) { |
|
abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
|
nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
|
} else |
|
abort_send(agent, mad_recv_wc, rmpp_mad->rmpp_hdr.rmpp_status); |
|
} |
|
|
|
static void process_rmpp_abort(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_status < IB_MGMT_RMPP_STATUS_ABORT_MIN || |
|
rmpp_mad->rmpp_hdr.rmpp_status > IB_MGMT_RMPP_STATUS_ABORT_MAX) { |
|
abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
|
nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
|
} else |
|
abort_send(agent, mad_recv_wc, rmpp_mad->rmpp_hdr.rmpp_status); |
|
} |
|
|
|
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) { |
|
abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_UNV); |
|
nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_UNV); |
|
goto out; |
|
} |
|
|
|
switch (rmpp_mad->rmpp_hdr.rmpp_type) { |
|
case IB_MGMT_RMPP_TYPE_DATA: |
|
return process_rmpp_data(agent, mad_recv_wc); |
|
case IB_MGMT_RMPP_TYPE_ACK: |
|
process_rmpp_ack(agent, mad_recv_wc); |
|
break; |
|
case IB_MGMT_RMPP_TYPE_STOP: |
|
process_rmpp_stop(agent, mad_recv_wc); |
|
break; |
|
case IB_MGMT_RMPP_TYPE_ABORT: |
|
process_rmpp_abort(agent, mad_recv_wc); |
|
break; |
|
default: |
|
abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BADT); |
|
nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BADT); |
|
break; |
|
} |
|
out: |
|
ib_free_recv_mad(mad_recv_wc); |
|
return NULL; |
|
} |
|
|
|
static int init_newwin(struct ib_mad_send_wr_private *mad_send_wr) |
|
{ |
|
struct ib_mad_agent_private *agent = mad_send_wr->mad_agent_priv; |
|
struct ib_mad_hdr *mad_hdr = mad_send_wr->send_buf.mad; |
|
struct mad_rmpp_recv *rmpp_recv; |
|
struct rdma_ah_attr ah_attr; |
|
unsigned long flags; |
|
int newwin = 1; |
|
|
|
if (!(mad_hdr->method & IB_MGMT_METHOD_RESP)) |
|
goto out; |
|
|
|
spin_lock_irqsave(&agent->lock, flags); |
|
list_for_each_entry(rmpp_recv, &agent->rmpp_list, list) { |
|
if (rmpp_recv->tid != mad_hdr->tid || |
|
rmpp_recv->mgmt_class != mad_hdr->mgmt_class || |
|
rmpp_recv->class_version != mad_hdr->class_version || |
|
(rmpp_recv->method & IB_MGMT_METHOD_RESP)) |
|
continue; |
|
|
|
if (rdma_query_ah(mad_send_wr->send_buf.ah, &ah_attr)) |
|
continue; |
|
|
|
if (rmpp_recv->slid == rdma_ah_get_dlid(&ah_attr)) { |
|
newwin = rmpp_recv->repwin; |
|
break; |
|
} |
|
} |
|
spin_unlock_irqrestore(&agent->lock, flags); |
|
out: |
|
return newwin; |
|
} |
|
|
|
int ib_send_rmpp_mad(struct ib_mad_send_wr_private *mad_send_wr) |
|
{ |
|
struct ib_rmpp_mad *rmpp_mad; |
|
int ret; |
|
|
|
rmpp_mad = mad_send_wr->send_buf.mad; |
|
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) { |
|
mad_send_wr->seg_num = 1; |
|
return IB_RMPP_RESULT_INTERNAL; |
|
} |
|
|
|
mad_send_wr->newwin = init_newwin(mad_send_wr); |
|
|
|
/* 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; |
|
int ret; |
|
|
|
rmpp_mad = mad_send_wr->send_buf.mad; |
|
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) |
|
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->send_buf.seg_count) { |
|
mad_send_wr->timeout = |
|
msecs_to_jiffies(mad_send_wr->send_buf.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->send_buf.seg_count) |
|
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 = mad_send_wr->send_buf.mad; |
|
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->send_buf.seg_count) |
|
return IB_RMPP_RESULT_PROCESSED; |
|
|
|
mad_send_wr->seg_num = mad_send_wr->last_ack; |
|
mad_send_wr->cur_seg = mad_send_wr->last_ack_seg; |
|
|
|
ret = send_next_seg(mad_send_wr); |
|
if (ret) |
|
return IB_RMPP_RESULT_PROCESSED; |
|
|
|
return IB_RMPP_RESULT_CONSUMED; |
|
}
|
|
|