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341 lines
9.9 KiB
341 lines
9.9 KiB
/* |
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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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#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 int mthca_update_rate(struct mthca_dev *dev, u8 port_num) |
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{ |
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struct ib_port_attr *tprops = NULL; |
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int ret; |
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tprops = kmalloc(sizeof *tprops, GFP_KERNEL); |
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if (!tprops) |
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return -ENOMEM; |
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ret = ib_query_port(&dev->ib_dev, port_num, tprops); |
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if (ret) { |
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dev_warn(&dev->ib_dev.dev, |
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"ib_query_port failed (%d) forport %d\n", ret, |
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port_num); |
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goto out; |
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} |
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dev->rate[port_num - 1] = tprops->active_speed * |
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ib_width_enum_to_int(tprops->active_width); |
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out: |
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kfree(tprops); |
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return ret; |
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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 rdma_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.type = rdma_ah_find_type(&dev->ib_dev, port_num); |
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rdma_ah_set_dlid(&ah_attr, lid); |
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rdma_ah_set_sl(&ah_attr, sl); |
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rdma_ah_set_port_num(&ah_attr, port_num); |
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new_ah = rdma_create_ah(dev->send_agent[port_num - 1][0]->qp->pd, |
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&ah_attr, 0); |
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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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rdma_destroy_ah(dev->sm_ah[port_num - 1], 0); |
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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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const struct ib_mad *mad, |
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u16 prev_lid) |
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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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struct ib_port_info *pinfo = |
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(struct ib_port_info *) ((struct ib_smp *) mad)->data; |
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u16 lid = be16_to_cpu(pinfo->lid); |
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mthca_update_rate(to_mdev(ibdev), port_num); |
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update_sm_ah(to_mdev(ibdev), port_num, |
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be16_to_cpu(pinfo->sm_lid), |
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pinfo->neighbormtu_mastersmsl & 0xf); |
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event.device = ibdev; |
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event.element.port_num = port_num; |
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if (pinfo->clientrereg_resv_subnetto & 0x80) { |
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event.event = IB_EVENT_CLIENT_REREGISTER; |
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ib_dispatch_event(&event); |
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} |
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if (prev_lid != lid) { |
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event.event = IB_EVENT_LID_CHANGE; |
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ib_dispatch_event(&event); |
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} |
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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, |
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IB_DEVICE_NODE_DESC_MAX); |
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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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const 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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IB_MGMT_BASE_VERSION); |
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if (IS_ERR(send_buf)) |
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return; |
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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, int mad_flags, u8 port_num, |
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const struct ib_wc *in_wc, const struct ib_grh *in_grh, |
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const struct ib_mad *in, struct ib_mad *out, |
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size_t *out_mad_size, u16 *out_mad_pkey_index) |
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{ |
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int err; |
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u16 slid = in_wc ? ib_lid_cpu16(in_wc->slid) : be16_to_cpu(IB_LID_PERMISSIVE); |
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u16 prev_lid = 0; |
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struct ib_port_attr pattr; |
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/* Forward locally generated traps to the SM */ |
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if (in->mad_hdr.method == IB_MGMT_METHOD_TRAP && !slid) { |
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forward_trap(to_mdev(ibdev), port_num, in); |
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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_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || |
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in->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { |
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if (in->mad_hdr.method != IB_MGMT_METHOD_GET && |
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in->mad_hdr.method != IB_MGMT_METHOD_SET && |
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in->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_hdr.attr_id == IB_SMP_ATTR_SM_INFO || |
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((in->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_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT || |
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in->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS1 || |
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in->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS2) { |
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if (in->mad_hdr.method != IB_MGMT_METHOD_GET && |
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in->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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if ((in->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || |
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in->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && |
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in->mad_hdr.method == IB_MGMT_METHOD_SET && |
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in->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO && |
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!ib_query_port(ibdev, port_num, &pattr)) |
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prev_lid = ib_lid_cpu16(pattr.lid); |
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err = mthca_MAD_IFC(to_mdev(ibdev), mad_flags & IB_MAD_IGNORE_MKEY, |
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mad_flags & IB_MAD_IGNORE_BKEY, port_num, in_wc, |
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in_grh, in, out); |
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if (err == -EBADMSG) |
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return IB_MAD_RESULT_SUCCESS; |
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else if (err) { |
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mthca_err(to_mdev(ibdev), "MAD_IFC returned %d\n", err); |
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return IB_MAD_RESULT_FAILURE; |
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} |
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if (!out->mad_hdr.status) { |
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smp_snoop(ibdev, port_num, in, prev_lid); |
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node_desc_override(ibdev, out); |
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} |
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/* set return bit in status of directed route responses */ |
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if (in->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) |
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out->mad_hdr.status |= cpu_to_be16(1 << 15); |
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if (in->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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int ret; |
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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, 0); |
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if (IS_ERR(agent)) { |
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ret = PTR_ERR(agent); |
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goto err; |
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} |
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dev->send_agent[p][q] = agent; |
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} |
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for (p = 1; p <= dev->limits.num_ports; ++p) { |
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ret = mthca_update_rate(dev, p); |
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if (ret) { |
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mthca_err(dev, "Failed to obtain port %d rate." |
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" aborting.\n", p); |
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goto err; |
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} |
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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 ret; |
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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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rdma_destroy_ah(dev->sm_ah[p], |
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RDMA_DESTROY_AH_SLEEPABLE); |
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} |
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}
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