| /* |
| * Copyright (c) 2007 Cisco Systems, 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 <rdma/ib_mad.h> |
| #include <rdma/ib_smi.h> |
| |
| #include <linux/mlx4/cmd.h> |
| #include <linux/gfp.h> |
| #include <rdma/ib_pma.h> |
| |
| #include "mlx4_ib.h" |
| |
| enum { |
| MLX4_IB_VENDOR_CLASS1 = 0x9, |
| MLX4_IB_VENDOR_CLASS2 = 0xa |
| }; |
| |
| int mlx4_MAD_IFC(struct mlx4_ib_dev *dev, int ignore_mkey, int ignore_bkey, |
| int port, struct ib_wc *in_wc, struct ib_grh *in_grh, |
| void *in_mad, void *response_mad) |
| { |
| struct mlx4_cmd_mailbox *inmailbox, *outmailbox; |
| void *inbox; |
| int err; |
| u32 in_modifier = port; |
| u8 op_modifier = 0; |
| |
| inmailbox = mlx4_alloc_cmd_mailbox(dev->dev); |
| if (IS_ERR(inmailbox)) |
| return PTR_ERR(inmailbox); |
| inbox = inmailbox->buf; |
| |
| outmailbox = mlx4_alloc_cmd_mailbox(dev->dev); |
| if (IS_ERR(outmailbox)) { |
| mlx4_free_cmd_mailbox(dev->dev, inmailbox); |
| return PTR_ERR(outmailbox); |
| } |
| |
| memcpy(inbox, in_mad, 256); |
| |
| /* |
| * Key check traps can't be generated unless we have in_wc to |
| * tell us where to send the trap. |
| */ |
| if (ignore_mkey || !in_wc) |
| op_modifier |= 0x1; |
| if (ignore_bkey || !in_wc) |
| op_modifier |= 0x2; |
| |
| if (in_wc) { |
| struct { |
| __be32 my_qpn; |
| u32 reserved1; |
| __be32 rqpn; |
| u8 sl; |
| u8 g_path; |
| u16 reserved2[2]; |
| __be16 pkey; |
| u32 reserved3[11]; |
| u8 grh[40]; |
| } *ext_info; |
| |
| memset(inbox + 256, 0, 256); |
| ext_info = inbox + 256; |
| |
| ext_info->my_qpn = cpu_to_be32(in_wc->qp->qp_num); |
| ext_info->rqpn = cpu_to_be32(in_wc->src_qp); |
| ext_info->sl = in_wc->sl << 4; |
| ext_info->g_path = in_wc->dlid_path_bits | |
| (in_wc->wc_flags & IB_WC_GRH ? 0x80 : 0); |
| ext_info->pkey = cpu_to_be16(in_wc->pkey_index); |
| |
| if (in_grh) |
| memcpy(ext_info->grh, in_grh, 40); |
| |
| op_modifier |= 0x4; |
| |
| in_modifier |= in_wc->slid << 16; |
| } |
| |
| err = mlx4_cmd_box(dev->dev, inmailbox->dma, outmailbox->dma, |
| in_modifier, op_modifier, |
| MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C); |
| |
| if (!err) |
| memcpy(response_mad, outmailbox->buf, 256); |
| |
| mlx4_free_cmd_mailbox(dev->dev, inmailbox); |
| mlx4_free_cmd_mailbox(dev->dev, outmailbox); |
| |
| return err; |
| } |
| |
| static void update_sm_ah(struct mlx4_ib_dev *dev, u8 port_num, u16 lid, u8 sl) |
| { |
| struct ib_ah *new_ah; |
| struct ib_ah_attr ah_attr; |
| |
| 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(&dev->sm_lock); |
| 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(&dev->sm_lock); |
| } |
| |
| /* |
| * 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); |
| |
| 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) { |
| spin_lock(&to_mdev(dev)->sm_lock); |
| memcpy(((struct ib_smp *) mad)->data, dev->node_desc, 64); |
| spin_unlock(&to_mdev(dev)->sm_lock); |
| } |
| } |
| |
| static void forward_trap(struct mlx4_ib_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; |
| |
| 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(&dev->sm_lock); |
| 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(&dev->sm_lock); |
| |
| if (ret) |
| ib_free_send_mad(send_buf); |
| } |
| } |
| |
| static int ib_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) |
| { |
| u16 slid, prev_lid = 0; |
| int err; |
| struct ib_port_attr pattr; |
| |
| slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE); |
| |
| 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; |
| } |
| |
| 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 == MLX4_IB_VENDOR_CLASS1 || |
| in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS2 || |
| in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_CONG_MGMT) { |
| 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 = mlx4_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) |
| 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 edit_counter(struct mlx4_counter *cnt, |
| struct ib_pma_portcounters *pma_cnt) |
| { |
| pma_cnt->port_xmit_data = cpu_to_be32((be64_to_cpu(cnt->tx_bytes)>>2)); |
| pma_cnt->port_rcv_data = cpu_to_be32((be64_to_cpu(cnt->rx_bytes)>>2)); |
| pma_cnt->port_xmit_packets = cpu_to_be32(be64_to_cpu(cnt->tx_frames)); |
| pma_cnt->port_rcv_packets = cpu_to_be32(be64_to_cpu(cnt->rx_frames)); |
| } |
| |
| static int iboe_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) |
| { |
| struct mlx4_cmd_mailbox *mailbox; |
| struct mlx4_ib_dev *dev = to_mdev(ibdev); |
| int err; |
| u32 inmod = dev->counters[port_num - 1] & 0xffff; |
| u8 mode; |
| |
| if (in_mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_PERF_MGMT) |
| return -EINVAL; |
| |
| mailbox = mlx4_alloc_cmd_mailbox(dev->dev); |
| if (IS_ERR(mailbox)) |
| return IB_MAD_RESULT_FAILURE; |
| |
| err = mlx4_cmd_box(dev->dev, 0, mailbox->dma, inmod, 0, |
| MLX4_CMD_QUERY_IF_STAT, MLX4_CMD_TIME_CLASS_C); |
| if (err) |
| err = IB_MAD_RESULT_FAILURE; |
| else { |
| memset(out_mad->data, 0, sizeof out_mad->data); |
| mode = ((struct mlx4_counter *)mailbox->buf)->counter_mode; |
| switch (mode & 0xf) { |
| case 0: |
| edit_counter(mailbox->buf, |
| (void *)(out_mad->data + 40)); |
| err = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; |
| break; |
| default: |
| err = IB_MAD_RESULT_FAILURE; |
| } |
| } |
| |
| mlx4_free_cmd_mailbox(dev->dev, mailbox); |
| |
| return err; |
| } |
| |
| int mlx4_ib_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) |
| { |
| switch (rdma_port_get_link_layer(ibdev, port_num)) { |
| case IB_LINK_LAYER_INFINIBAND: |
| return ib_process_mad(ibdev, mad_flags, port_num, in_wc, |
| in_grh, in_mad, out_mad); |
| case IB_LINK_LAYER_ETHERNET: |
| return iboe_process_mad(ibdev, mad_flags, port_num, in_wc, |
| in_grh, in_mad, out_mad); |
| default: |
| return -EINVAL; |
| } |
| } |
| |
| 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 mlx4_ib_mad_init(struct mlx4_ib_dev *dev) |
| { |
| struct ib_mad_agent *agent; |
| int p, q; |
| int ret; |
| enum rdma_link_layer ll; |
| |
| for (p = 0; p < dev->num_ports; ++p) { |
| ll = rdma_port_get_link_layer(&dev->ib_dev, p + 1); |
| for (q = 0; q <= 1; ++q) { |
| if (ll == IB_LINK_LAYER_INFINIBAND) { |
| 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; |
| } else |
| dev->send_agent[p][q] = NULL; |
| } |
| } |
| |
| return 0; |
| |
| err: |
| for (p = 0; p < dev->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 mlx4_ib_mad_cleanup(struct mlx4_ib_dev *dev) |
| { |
| struct ib_mad_agent *agent; |
| int p, q; |
| |
| for (p = 0; p < dev->num_ports; ++p) { |
| for (q = 0; q <= 1; ++q) { |
| agent = dev->send_agent[p][q]; |
| if (agent) { |
| dev->send_agent[p][q] = NULL; |
| ib_unregister_mad_agent(agent); |
| } |
| } |
| |
| if (dev->sm_ah[p]) |
| ib_destroy_ah(dev->sm_ah[p]); |
| } |
| } |