290 lines
8.5 KiB
C
290 lines
8.5 KiB
C
/*
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* Copyright (c) 2004 Topspin Communications. All rights reserved.
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* Copyright (c) 2005 Mellanox Technologies. All rights reserved.
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* Copyright (c) 2004 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: mthca_mad.c 1349 2004-12-16 21:09:43Z roland $
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*/
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#include <linux/string.h>
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#include <linux/slab.h>
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#include <rdma/ib_verbs.h>
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#include <rdma/ib_mad.h>
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#include <rdma/ib_smi.h>
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#include "mthca_dev.h"
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#include "mthca_cmd.h"
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enum {
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MTHCA_VENDOR_CLASS1 = 0x9,
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MTHCA_VENDOR_CLASS2 = 0xa
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};
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static void update_sm_ah(struct mthca_dev *dev,
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u8 port_num, u16 lid, u8 sl)
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{
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struct ib_ah *new_ah;
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struct ib_ah_attr ah_attr;
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unsigned long flags;
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if (!dev->send_agent[port_num - 1][0])
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return;
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memset(&ah_attr, 0, sizeof ah_attr);
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ah_attr.dlid = lid;
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ah_attr.sl = sl;
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ah_attr.port_num = port_num;
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new_ah = ib_create_ah(dev->send_agent[port_num - 1][0]->qp->pd,
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&ah_attr);
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if (IS_ERR(new_ah))
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return;
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spin_lock_irqsave(&dev->sm_lock, flags);
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if (dev->sm_ah[port_num - 1])
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ib_destroy_ah(dev->sm_ah[port_num - 1]);
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dev->sm_ah[port_num - 1] = new_ah;
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spin_unlock_irqrestore(&dev->sm_lock, flags);
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}
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/*
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* Snoop SM MADs for port info and P_Key table sets, so we can
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* synthesize LID change and P_Key change events.
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*/
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static void smp_snoop(struct ib_device *ibdev,
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u8 port_num,
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struct ib_mad *mad)
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{
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struct ib_event event;
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if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
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mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
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mad->mad_hdr.method == IB_MGMT_METHOD_SET) {
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if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO) {
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update_sm_ah(to_mdev(ibdev), port_num,
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be16_to_cpup((__be16 *) (mad->data + 58)),
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(*(u8 *) (mad->data + 76)) & 0xf);
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event.device = ibdev;
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event.event = IB_EVENT_LID_CHANGE;
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event.element.port_num = port_num;
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ib_dispatch_event(&event);
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}
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if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PKEY_TABLE) {
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event.device = ibdev;
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event.event = IB_EVENT_PKEY_CHANGE;
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event.element.port_num = port_num;
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ib_dispatch_event(&event);
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}
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}
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}
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static void node_desc_override(struct ib_device *dev,
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struct ib_mad *mad)
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{
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if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
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mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
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mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP &&
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mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) {
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mutex_lock(&to_mdev(dev)->cap_mask_mutex);
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memcpy(((struct ib_smp *) mad)->data, dev->node_desc, 64);
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mutex_unlock(&to_mdev(dev)->cap_mask_mutex);
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}
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}
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static void forward_trap(struct mthca_dev *dev,
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u8 port_num,
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struct ib_mad *mad)
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{
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int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED;
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struct ib_mad_send_buf *send_buf;
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struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn];
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int ret;
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unsigned long flags;
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if (agent) {
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send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR,
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IB_MGMT_MAD_DATA, GFP_ATOMIC);
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/*
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* We rely here on the fact that MLX QPs don't use the
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* address handle after the send is posted (this is
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* wrong following the IB spec strictly, but we know
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* it's OK for our devices).
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*/
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spin_lock_irqsave(&dev->sm_lock, flags);
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memcpy(send_buf->mad, mad, sizeof *mad);
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if ((send_buf->ah = dev->sm_ah[port_num - 1]))
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ret = ib_post_send_mad(send_buf, NULL);
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else
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ret = -EINVAL;
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spin_unlock_irqrestore(&dev->sm_lock, flags);
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if (ret)
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ib_free_send_mad(send_buf);
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}
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}
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int mthca_process_mad(struct ib_device *ibdev,
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int mad_flags,
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u8 port_num,
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struct ib_wc *in_wc,
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struct ib_grh *in_grh,
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struct ib_mad *in_mad,
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struct ib_mad *out_mad)
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{
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int err;
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u8 status;
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u16 slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
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/* Forward locally generated traps to the SM */
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if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP &&
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slid == 0) {
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forward_trap(to_mdev(ibdev), port_num, in_mad);
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return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
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}
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/*
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* Only handle SM gets, sets and trap represses for SM class
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*
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* Only handle PMA and Mellanox vendor-specific class gets and
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* sets for other classes.
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*/
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if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
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in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
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if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET &&
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in_mad->mad_hdr.method != IB_MGMT_METHOD_SET &&
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in_mad->mad_hdr.method != IB_MGMT_METHOD_TRAP_REPRESS)
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return IB_MAD_RESULT_SUCCESS;
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/*
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* Don't process SMInfo queries or vendor-specific
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* MADs -- the SMA can't handle them.
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*/
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if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO ||
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((in_mad->mad_hdr.attr_id & IB_SMP_ATTR_VENDOR_MASK) ==
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IB_SMP_ATTR_VENDOR_MASK))
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return IB_MAD_RESULT_SUCCESS;
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} else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT ||
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in_mad->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS1 ||
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in_mad->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS2) {
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if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET &&
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in_mad->mad_hdr.method != IB_MGMT_METHOD_SET)
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return IB_MAD_RESULT_SUCCESS;
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} else
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return IB_MAD_RESULT_SUCCESS;
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err = mthca_MAD_IFC(to_mdev(ibdev),
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mad_flags & IB_MAD_IGNORE_MKEY,
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mad_flags & IB_MAD_IGNORE_BKEY,
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port_num, in_wc, in_grh, in_mad, out_mad,
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&status);
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if (err) {
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mthca_err(to_mdev(ibdev), "MAD_IFC failed\n");
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return IB_MAD_RESULT_FAILURE;
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}
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if (status == MTHCA_CMD_STAT_BAD_PKT)
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return IB_MAD_RESULT_SUCCESS;
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if (status) {
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mthca_err(to_mdev(ibdev), "MAD_IFC returned status %02x\n",
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status);
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return IB_MAD_RESULT_FAILURE;
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}
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if (!out_mad->mad_hdr.status) {
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smp_snoop(ibdev, port_num, in_mad);
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node_desc_override(ibdev, out_mad);
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}
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/* set return bit in status of directed route responses */
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if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
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out_mad->mad_hdr.status |= cpu_to_be16(1 << 15);
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if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS)
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/* no response for trap repress */
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return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
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return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
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}
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static void send_handler(struct ib_mad_agent *agent,
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struct ib_mad_send_wc *mad_send_wc)
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{
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ib_free_send_mad(mad_send_wc->send_buf);
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}
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int mthca_create_agents(struct mthca_dev *dev)
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{
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struct ib_mad_agent *agent;
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int p, q;
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spin_lock_init(&dev->sm_lock);
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for (p = 0; p < dev->limits.num_ports; ++p)
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for (q = 0; q <= 1; ++q) {
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agent = ib_register_mad_agent(&dev->ib_dev, p + 1,
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q ? IB_QPT_GSI : IB_QPT_SMI,
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NULL, 0, send_handler,
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NULL, NULL);
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if (IS_ERR(agent))
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goto err;
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dev->send_agent[p][q] = agent;
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}
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return 0;
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err:
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for (p = 0; p < dev->limits.num_ports; ++p)
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for (q = 0; q <= 1; ++q)
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if (dev->send_agent[p][q])
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ib_unregister_mad_agent(dev->send_agent[p][q]);
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return PTR_ERR(agent);
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}
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void mthca_free_agents(struct mthca_dev *dev)
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{
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struct ib_mad_agent *agent;
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int p, q;
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for (p = 0; p < dev->limits.num_ports; ++p) {
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for (q = 0; q <= 1; ++q) {
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agent = dev->send_agent[p][q];
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dev->send_agent[p][q] = NULL;
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ib_unregister_mad_agent(agent);
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}
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if (dev->sm_ah[p])
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ib_destroy_ah(dev->sm_ah[p]);
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}
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}
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