/* * Copyright (c) 2004 Topspin Communications. All rights reserved. * Copyright (c) 2005 Mellanox Technologies. All rights reserved. * Copyright (c) 2004 Voltaire, Inc. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #include <linux/string.h> #include <linux/slab.h> #include <rdma/ib_verbs.h> #include <rdma/ib_mad.h> #include <rdma/ib_smi.h> #include "mthca_dev.h" #include "mthca_cmd.h" enum { MTHCA_VENDOR_CLASS1 = 0x9, MTHCA_VENDOR_CLASS2 = 0xa }; static int mthca_update_rate(struct mthca_dev *dev, u8 port_num) { struct ib_port_attr *tprops = NULL; int ret; tprops = kmalloc(sizeof *tprops, GFP_KERNEL); if (!tprops) return -ENOMEM; ret = ib_query_port(&dev->ib_dev, port_num, tprops); if (ret) { printk(KERN_WARNING "ib_query_port failed (%d) for %s port %d\n", ret, dev->ib_dev.name, port_num); goto out; } dev->rate[port_num - 1] = tprops->active_speed * ib_width_enum_to_int(tprops->active_width); out: kfree(tprops); return ret; } static void update_sm_ah(struct mthca_dev *dev, u8 port_num, u16 lid, u8 sl) { struct ib_ah *new_ah; struct ib_ah_attr ah_attr; unsigned long flags; if (!dev->send_agent[port_num - 1][0]) return; memset(&ah_attr, 0, sizeof ah_attr); ah_attr.dlid = lid; ah_attr.sl = sl; ah_attr.port_num = port_num; new_ah = ib_create_ah(dev->send_agent[port_num - 1][0]->qp->pd, &ah_attr); if (IS_ERR(new_ah)) return; spin_lock_irqsave(&dev->sm_lock, flags); if (dev->sm_ah[port_num - 1]) ib_destroy_ah(dev->sm_ah[port_num - 1]); dev->sm_ah[port_num - 1] = new_ah; spin_unlock_irqrestore(&dev->sm_lock, flags); } /* * Snoop SM MADs for port info and P_Key table sets, so we can * synthesize LID change and P_Key change events. */ static void smp_snoop(struct ib_device *ibdev, u8 port_num, struct ib_mad *mad, u16 prev_lid) { struct ib_event event; if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && mad->mad_hdr.method == IB_MGMT_METHOD_SET) { if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO) { struct ib_port_info *pinfo = (struct ib_port_info *) ((struct ib_smp *) mad)->data; u16 lid = be16_to_cpu(pinfo->lid); mthca_update_rate(to_mdev(ibdev), port_num); update_sm_ah(to_mdev(ibdev), port_num, be16_to_cpu(pinfo->sm_lid), pinfo->neighbormtu_mastersmsl & 0xf); event.device = ibdev; event.element.port_num = port_num; if (pinfo->clientrereg_resv_subnetto & 0x80) { event.event = IB_EVENT_CLIENT_REREGISTER; ib_dispatch_event(&event); } if (prev_lid != lid) { event.event = IB_EVENT_LID_CHANGE; ib_dispatch_event(&event); } } if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PKEY_TABLE) { event.device = ibdev; event.event = IB_EVENT_PKEY_CHANGE; event.element.port_num = port_num; ib_dispatch_event(&event); } } } static void node_desc_override(struct ib_device *dev, struct ib_mad *mad) { if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP && mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) { mutex_lock(&to_mdev(dev)->cap_mask_mutex); memcpy(((struct ib_smp *) mad)->data, dev->node_desc, 64); mutex_unlock(&to_mdev(dev)->cap_mask_mutex); } } static void forward_trap(struct mthca_dev *dev, u8 port_num, struct ib_mad *mad) { int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED; struct ib_mad_send_buf *send_buf; struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn]; int ret; unsigned long flags; if (agent) { send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, GFP_ATOMIC); if (IS_ERR(send_buf)) return; /* * We rely here on the fact that MLX QPs don't use the * address handle after the send is posted (this is * wrong following the IB spec strictly, but we know * it's OK for our devices). */ spin_lock_irqsave(&dev->sm_lock, flags); memcpy(send_buf->mad, mad, sizeof *mad); if ((send_buf->ah = dev->sm_ah[port_num - 1])) ret = ib_post_send_mad(send_buf, NULL); else ret = -EINVAL; spin_unlock_irqrestore(&dev->sm_lock, flags); if (ret) ib_free_send_mad(send_buf); } } int mthca_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, struct ib_wc *in_wc, struct ib_grh *in_grh, struct ib_mad *in_mad, struct ib_mad *out_mad) { int err; u16 slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE); u16 prev_lid = 0; struct ib_port_attr pattr; /* Forward locally generated traps to the SM */ if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0) { forward_trap(to_mdev(ibdev), port_num, in_mad); return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; } /* * Only handle SM gets, sets and trap represses for SM class * * Only handle PMA and Mellanox vendor-specific class gets and * sets for other classes. */ if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && in_mad->mad_hdr.method != IB_MGMT_METHOD_SET && in_mad->mad_hdr.method != IB_MGMT_METHOD_TRAP_REPRESS) return IB_MAD_RESULT_SUCCESS; /* * Don't process SMInfo queries or vendor-specific * MADs -- the SMA can't handle them. */ if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO || ((in_mad->mad_hdr.attr_id & IB_SMP_ATTR_VENDOR_MASK) == IB_SMP_ATTR_VENDOR_MASK)) return IB_MAD_RESULT_SUCCESS; } else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT || in_mad->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS1 || in_mad->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS2) { if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && in_mad->mad_hdr.method != IB_MGMT_METHOD_SET) return IB_MAD_RESULT_SUCCESS; } else return IB_MAD_RESULT_SUCCESS; if ((in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && in_mad->mad_hdr.method == IB_MGMT_METHOD_SET && in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO && !ib_query_port(ibdev, port_num, &pattr)) prev_lid = pattr.lid; err = mthca_MAD_IFC(to_mdev(ibdev), mad_flags & IB_MAD_IGNORE_MKEY, mad_flags & IB_MAD_IGNORE_BKEY, port_num, in_wc, in_grh, in_mad, out_mad); if (err == -EBADMSG) return IB_MAD_RESULT_SUCCESS; else if (err) { mthca_err(to_mdev(ibdev), "MAD_IFC returned %d\n", err); return IB_MAD_RESULT_FAILURE; } if (!out_mad->mad_hdr.status) { smp_snoop(ibdev, port_num, in_mad, prev_lid); node_desc_override(ibdev, out_mad); } /* set return bit in status of directed route responses */ if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) out_mad->mad_hdr.status |= cpu_to_be16(1 << 15); if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) /* no response for trap repress */ return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; } static void send_handler(struct ib_mad_agent *agent, struct ib_mad_send_wc *mad_send_wc) { ib_free_send_mad(mad_send_wc->send_buf); } int mthca_create_agents(struct mthca_dev *dev) { struct ib_mad_agent *agent; int p, q; int ret; spin_lock_init(&dev->sm_lock); for (p = 0; p < dev->limits.num_ports; ++p) for (q = 0; q <= 1; ++q) { agent = ib_register_mad_agent(&dev->ib_dev, p + 1, q ? IB_QPT_GSI : IB_QPT_SMI, NULL, 0, send_handler, NULL, NULL); if (IS_ERR(agent)) { ret = PTR_ERR(agent); goto err; } dev->send_agent[p][q] = agent; } for (p = 1; p <= dev->limits.num_ports; ++p) { ret = mthca_update_rate(dev, p); if (ret) { mthca_err(dev, "Failed to obtain port %d rate." " aborting.\n", p); goto err; } } return 0; err: for (p = 0; p < dev->limits.num_ports; ++p) for (q = 0; q <= 1; ++q) if (dev->send_agent[p][q]) ib_unregister_mad_agent(dev->send_agent[p][q]); return ret; } void mthca_free_agents(struct mthca_dev *dev) { struct ib_mad_agent *agent; int p, q; for (p = 0; p < dev->limits.num_ports; ++p) { for (q = 0; q <= 1; ++q) { agent = dev->send_agent[p][q]; dev->send_agent[p][q] = NULL; ib_unregister_mad_agent(agent); } if (dev->sm_ah[p]) ib_destroy_ah(dev->sm_ah[p]); } }