1 /* 2 * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 */ 32 33 #include <linux/mlx5/cmd.h> 34 #include <rdma/ib_mad.h> 35 #include <rdma/ib_smi.h> 36 #include "mlx5_ib.h" 37 38 enum { 39 MLX5_IB_VENDOR_CLASS1 = 0x9, 40 MLX5_IB_VENDOR_CLASS2 = 0xa 41 }; 42 43 int mlx5_MAD_IFC(struct mlx5_ib_dev *dev, int ignore_mkey, int ignore_bkey, 44 u8 port, struct ib_wc *in_wc, struct ib_grh *in_grh, 45 void *in_mad, void *response_mad) 46 { 47 u8 op_modifier = 0; 48 49 /* Key check traps can't be generated unless we have in_wc to 50 * tell us where to send the trap. 51 */ 52 if (ignore_mkey || !in_wc) 53 op_modifier |= 0x1; 54 if (ignore_bkey || !in_wc) 55 op_modifier |= 0x2; 56 57 return mlx5_core_mad_ifc(dev->mdev, in_mad, response_mad, op_modifier, port); 58 } 59 60 int mlx5_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, 61 struct ib_wc *in_wc, struct ib_grh *in_grh, 62 struct ib_mad *in_mad, struct ib_mad *out_mad) 63 { 64 u16 slid; 65 int err; 66 67 slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE); 68 69 if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0) 70 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; 71 72 if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || 73 in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { 74 if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && 75 in_mad->mad_hdr.method != IB_MGMT_METHOD_SET && 76 in_mad->mad_hdr.method != IB_MGMT_METHOD_TRAP_REPRESS) 77 return IB_MAD_RESULT_SUCCESS; 78 79 /* Don't process SMInfo queries -- the SMA can't handle them. 80 */ 81 if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO) 82 return IB_MAD_RESULT_SUCCESS; 83 } else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT || 84 in_mad->mad_hdr.mgmt_class == MLX5_IB_VENDOR_CLASS1 || 85 in_mad->mad_hdr.mgmt_class == MLX5_IB_VENDOR_CLASS2 || 86 in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_CONG_MGMT) { 87 if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && 88 in_mad->mad_hdr.method != IB_MGMT_METHOD_SET) 89 return IB_MAD_RESULT_SUCCESS; 90 } else { 91 return IB_MAD_RESULT_SUCCESS; 92 } 93 94 err = mlx5_MAD_IFC(to_mdev(ibdev), 95 mad_flags & IB_MAD_IGNORE_MKEY, 96 mad_flags & IB_MAD_IGNORE_BKEY, 97 port_num, in_wc, in_grh, in_mad, out_mad); 98 if (err) 99 return IB_MAD_RESULT_FAILURE; 100 101 /* set return bit in status of directed route responses */ 102 if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) 103 out_mad->mad_hdr.status |= cpu_to_be16(1 << 15); 104 105 if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) 106 /* no response for trap repress */ 107 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; 108 109 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; 110 } 111 112 int mlx5_query_ext_port_caps(struct mlx5_ib_dev *dev, u8 port) 113 { 114 struct ib_smp *in_mad = NULL; 115 struct ib_smp *out_mad = NULL; 116 int err = -ENOMEM; 117 u16 packet_error; 118 119 in_mad = kzalloc(sizeof(*in_mad), GFP_KERNEL); 120 out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL); 121 if (!in_mad || !out_mad) 122 goto out; 123 124 init_query_mad(in_mad); 125 in_mad->attr_id = MLX5_ATTR_EXTENDED_PORT_INFO; 126 in_mad->attr_mod = cpu_to_be32(port); 127 128 err = mlx5_MAD_IFC(dev, 1, 1, 1, NULL, NULL, in_mad, out_mad); 129 130 packet_error = be16_to_cpu(out_mad->status); 131 132 dev->mdev->caps.gen.ext_port_cap[port - 1] = (!err && !packet_error) ? 133 MLX_EXT_PORT_CAP_FLAG_EXTENDED_PORT_INFO : 0; 134 135 out: 136 kfree(in_mad); 137 kfree(out_mad); 138 return err; 139 } 140