361 lines
10 KiB
C
361 lines
10 KiB
C
/*
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* Copyright (c) 2004, 2005 Mellanox Technologies Ltd. All rights reserved.
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* Copyright (c) 2004, 2005 Infinicon Corporation. All rights reserved.
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* Copyright (c) 2004, 2005 Intel Corporation. All rights reserved.
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* Copyright (c) 2004, 2005 Topspin Corporation. All rights reserved.
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* Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved.
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* Copyright (c) 2005 Sun Microsystems, 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: agent.c 1389 2004-12-27 22:56:47Z roland $
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*/
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#include <linux/dma-mapping.h>
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#include <asm/bug.h>
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#include <rdma/ib_smi.h>
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#include "smi.h"
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#include "agent_priv.h"
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#include "mad_priv.h"
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#include "agent.h"
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spinlock_t ib_agent_port_list_lock;
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static LIST_HEAD(ib_agent_port_list);
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/*
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* Caller must hold ib_agent_port_list_lock
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*/
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static inline struct ib_agent_port_private *
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__ib_get_agent_port(struct ib_device *device, int port_num,
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struct ib_mad_agent *mad_agent)
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{
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struct ib_agent_port_private *entry;
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BUG_ON(!(!!device ^ !!mad_agent)); /* Exactly one MUST be (!NULL) */
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if (device) {
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list_for_each_entry(entry, &ib_agent_port_list, port_list) {
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if (entry->smp_agent->device == device &&
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entry->port_num == port_num)
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return entry;
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}
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} else {
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list_for_each_entry(entry, &ib_agent_port_list, port_list) {
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if ((entry->smp_agent == mad_agent) ||
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(entry->perf_mgmt_agent == mad_agent))
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return entry;
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}
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}
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return NULL;
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}
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static inline struct ib_agent_port_private *
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ib_get_agent_port(struct ib_device *device, int port_num,
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struct ib_mad_agent *mad_agent)
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{
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struct ib_agent_port_private *entry;
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unsigned long flags;
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spin_lock_irqsave(&ib_agent_port_list_lock, flags);
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entry = __ib_get_agent_port(device, port_num, mad_agent);
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spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
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return entry;
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}
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int smi_check_local_dr_smp(struct ib_smp *smp,
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struct ib_device *device,
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int port_num)
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{
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struct ib_agent_port_private *port_priv;
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if (smp->mgmt_class != IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
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return 1;
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port_priv = ib_get_agent_port(device, port_num, NULL);
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if (!port_priv) {
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printk(KERN_DEBUG SPFX "smi_check_local_dr_smp %s port %d "
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"not open\n",
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device->name, port_num);
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return 1;
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}
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return smi_check_local_smp(port_priv->smp_agent, smp);
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}
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static int agent_mad_send(struct ib_mad_agent *mad_agent,
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struct ib_agent_port_private *port_priv,
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struct ib_mad_private *mad_priv,
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struct ib_grh *grh,
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struct ib_wc *wc)
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{
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struct ib_agent_send_wr *agent_send_wr;
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struct ib_sge gather_list;
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struct ib_send_wr send_wr;
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struct ib_send_wr *bad_send_wr;
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struct ib_ah_attr ah_attr;
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unsigned long flags;
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int ret = 1;
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agent_send_wr = kmalloc(sizeof(*agent_send_wr), GFP_KERNEL);
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if (!agent_send_wr)
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goto out;
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agent_send_wr->mad = mad_priv;
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gather_list.addr = dma_map_single(mad_agent->device->dma_device,
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&mad_priv->mad,
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sizeof(mad_priv->mad),
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DMA_TO_DEVICE);
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gather_list.length = sizeof(mad_priv->mad);
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gather_list.lkey = mad_agent->mr->lkey;
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send_wr.next = NULL;
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send_wr.opcode = IB_WR_SEND;
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send_wr.sg_list = &gather_list;
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send_wr.num_sge = 1;
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send_wr.wr.ud.remote_qpn = wc->src_qp; /* DQPN */
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send_wr.wr.ud.timeout_ms = 0;
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send_wr.send_flags = IB_SEND_SIGNALED | IB_SEND_SOLICITED;
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ah_attr.dlid = wc->slid;
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ah_attr.port_num = mad_agent->port_num;
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ah_attr.src_path_bits = wc->dlid_path_bits;
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ah_attr.sl = wc->sl;
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ah_attr.static_rate = 0;
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ah_attr.ah_flags = 0; /* No GRH */
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if (mad_priv->mad.mad.mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT) {
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if (wc->wc_flags & IB_WC_GRH) {
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ah_attr.ah_flags = IB_AH_GRH;
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/* Should sgid be looked up ? */
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ah_attr.grh.sgid_index = 0;
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ah_attr.grh.hop_limit = grh->hop_limit;
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ah_attr.grh.flow_label = be32_to_cpu(
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grh->version_tclass_flow) & 0xfffff;
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ah_attr.grh.traffic_class = (be32_to_cpu(
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grh->version_tclass_flow) >> 20) & 0xff;
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memcpy(ah_attr.grh.dgid.raw,
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grh->sgid.raw,
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sizeof(ah_attr.grh.dgid));
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}
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}
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agent_send_wr->ah = ib_create_ah(mad_agent->qp->pd, &ah_attr);
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if (IS_ERR(agent_send_wr->ah)) {
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printk(KERN_ERR SPFX "No memory for address handle\n");
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kfree(agent_send_wr);
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goto out;
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}
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send_wr.wr.ud.ah = agent_send_wr->ah;
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if (mad_priv->mad.mad.mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT) {
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send_wr.wr.ud.pkey_index = wc->pkey_index;
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send_wr.wr.ud.remote_qkey = IB_QP1_QKEY;
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} else { /* for SMPs */
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send_wr.wr.ud.pkey_index = 0;
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send_wr.wr.ud.remote_qkey = 0;
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}
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send_wr.wr.ud.mad_hdr = &mad_priv->mad.mad.mad_hdr;
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send_wr.wr_id = (unsigned long)agent_send_wr;
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pci_unmap_addr_set(agent_send_wr, mapping, gather_list.addr);
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/* Send */
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spin_lock_irqsave(&port_priv->send_list_lock, flags);
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if (ib_post_send_mad(mad_agent, &send_wr, &bad_send_wr)) {
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spin_unlock_irqrestore(&port_priv->send_list_lock, flags);
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dma_unmap_single(mad_agent->device->dma_device,
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pci_unmap_addr(agent_send_wr, mapping),
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sizeof(mad_priv->mad),
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DMA_TO_DEVICE);
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ib_destroy_ah(agent_send_wr->ah);
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kfree(agent_send_wr);
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} else {
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list_add_tail(&agent_send_wr->send_list,
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&port_priv->send_posted_list);
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spin_unlock_irqrestore(&port_priv->send_list_lock, flags);
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ret = 0;
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}
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out:
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return ret;
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}
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int agent_send(struct ib_mad_private *mad,
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struct ib_grh *grh,
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struct ib_wc *wc,
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struct ib_device *device,
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int port_num)
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{
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struct ib_agent_port_private *port_priv;
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struct ib_mad_agent *mad_agent;
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port_priv = ib_get_agent_port(device, port_num, NULL);
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if (!port_priv) {
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printk(KERN_DEBUG SPFX "agent_send %s port %d not open\n",
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device->name, port_num);
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return 1;
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}
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/* Get mad agent based on mgmt_class in MAD */
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switch (mad->mad.mad.mad_hdr.mgmt_class) {
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case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
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case IB_MGMT_CLASS_SUBN_LID_ROUTED:
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mad_agent = port_priv->smp_agent;
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break;
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case IB_MGMT_CLASS_PERF_MGMT:
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mad_agent = port_priv->perf_mgmt_agent;
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break;
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default:
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return 1;
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}
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return agent_mad_send(mad_agent, port_priv, mad, grh, wc);
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}
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static void agent_send_handler(struct ib_mad_agent *mad_agent,
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struct ib_mad_send_wc *mad_send_wc)
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{
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struct ib_agent_port_private *port_priv;
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struct ib_agent_send_wr *agent_send_wr;
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unsigned long flags;
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/* Find matching MAD agent */
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port_priv = ib_get_agent_port(NULL, 0, mad_agent);
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if (!port_priv) {
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printk(KERN_ERR SPFX "agent_send_handler: no matching MAD "
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"agent %p\n", mad_agent);
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return;
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}
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agent_send_wr = (struct ib_agent_send_wr *)(unsigned long)mad_send_wc->wr_id;
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spin_lock_irqsave(&port_priv->send_list_lock, flags);
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/* Remove completed send from posted send MAD list */
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list_del(&agent_send_wr->send_list);
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spin_unlock_irqrestore(&port_priv->send_list_lock, flags);
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dma_unmap_single(mad_agent->device->dma_device,
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pci_unmap_addr(agent_send_wr, mapping),
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sizeof(agent_send_wr->mad->mad),
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DMA_TO_DEVICE);
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ib_destroy_ah(agent_send_wr->ah);
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/* Release allocated memory */
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kmem_cache_free(ib_mad_cache, agent_send_wr->mad);
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kfree(agent_send_wr);
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}
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int ib_agent_port_open(struct ib_device *device, int port_num)
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{
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int ret;
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struct ib_agent_port_private *port_priv;
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unsigned long flags;
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/* First, check if port already open for SMI */
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port_priv = ib_get_agent_port(device, port_num, NULL);
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if (port_priv) {
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printk(KERN_DEBUG SPFX "%s port %d already open\n",
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device->name, port_num);
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return 0;
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}
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/* Create new device info */
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port_priv = kmalloc(sizeof *port_priv, GFP_KERNEL);
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if (!port_priv) {
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printk(KERN_ERR SPFX "No memory for ib_agent_port_private\n");
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ret = -ENOMEM;
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goto error1;
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}
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memset(port_priv, 0, sizeof *port_priv);
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port_priv->port_num = port_num;
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spin_lock_init(&port_priv->send_list_lock);
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INIT_LIST_HEAD(&port_priv->send_posted_list);
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/* Obtain send only MAD agent for SM class (SMI QP) */
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port_priv->smp_agent = ib_register_mad_agent(device, port_num,
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IB_QPT_SMI,
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NULL, 0,
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&agent_send_handler,
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NULL, NULL);
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if (IS_ERR(port_priv->smp_agent)) {
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ret = PTR_ERR(port_priv->smp_agent);
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goto error2;
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}
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/* Obtain send only MAD agent for PerfMgmt class (GSI QP) */
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port_priv->perf_mgmt_agent = ib_register_mad_agent(device, port_num,
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IB_QPT_GSI,
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NULL, 0,
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&agent_send_handler,
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NULL, NULL);
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if (IS_ERR(port_priv->perf_mgmt_agent)) {
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ret = PTR_ERR(port_priv->perf_mgmt_agent);
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goto error3;
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}
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spin_lock_irqsave(&ib_agent_port_list_lock, flags);
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list_add_tail(&port_priv->port_list, &ib_agent_port_list);
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spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
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return 0;
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error3:
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ib_unregister_mad_agent(port_priv->smp_agent);
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error2:
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kfree(port_priv);
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error1:
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return ret;
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}
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int ib_agent_port_close(struct ib_device *device, int port_num)
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{
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struct ib_agent_port_private *port_priv;
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unsigned long flags;
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spin_lock_irqsave(&ib_agent_port_list_lock, flags);
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port_priv = __ib_get_agent_port(device, port_num, NULL);
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if (port_priv == NULL) {
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spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
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printk(KERN_ERR SPFX "Port %d not found\n", port_num);
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return -ENODEV;
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}
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list_del(&port_priv->port_list);
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spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
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ib_unregister_mad_agent(port_priv->perf_mgmt_agent);
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ib_unregister_mad_agent(port_priv->smp_agent);
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kfree(port_priv);
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return 0;
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}
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