drivers/infiniband/hw/mlx5/mad.c

   1 /*
   2  * Copyright (c) 2013-2015, Mellanox Technologies. 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, const struct ib_wc *in_wc, const struct ib_grh *in_grh,
  45                  const 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                         const struct ib_wc *in_wc, const struct ib_grh *in_grh,
  62                         const struct ib_mad_hdr *in, size_t in_mad_size,
  63                         struct ib_mad_hdr *out, size_t *out_mad_size,
  64                         u16 *out_mad_pkey_index)
  65 {
  66         u16 slid;
  67         int err;
  68         const struct ib_mad *in_mad = (const struct ib_mad *)in;
  69         struct ib_mad *out_mad = (struct ib_mad *)out;
  70
  71         BUG_ON(in_mad_size != sizeof(*in_mad) ||
  72                *out_mad_size != sizeof(*out_mad));
  73
  74         slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
  75
  76         if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0)
  77                 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
  78
  79         if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
  80             in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
  81                 if (in_mad->mad_hdr.method   != IB_MGMT_METHOD_GET &&
  82                     in_mad->mad_hdr.method   != IB_MGMT_METHOD_SET &&
  83                     in_mad->mad_hdr.method   != IB_MGMT_METHOD_TRAP_REPRESS)
  84                         return IB_MAD_RESULT_SUCCESS;
  85
  86                 /* Don't process SMInfo queries -- the SMA can't handle them.
  87                  */
  88                 if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO)
  89                         return IB_MAD_RESULT_SUCCESS;
  90         } else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT ||
  91                    in_mad->mad_hdr.mgmt_class == MLX5_IB_VENDOR_CLASS1   ||
  92                    in_mad->mad_hdr.mgmt_class == MLX5_IB_VENDOR_CLASS2   ||
  93                    in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_CONG_MGMT) {
  94                 if (in_mad->mad_hdr.method  != IB_MGMT_METHOD_GET &&
  95                     in_mad->mad_hdr.method  != IB_MGMT_METHOD_SET)
  96                         return IB_MAD_RESULT_SUCCESS;
  97         } else {
  98                 return IB_MAD_RESULT_SUCCESS;
  99         }
 100
 101         err = mlx5_MAD_IFC(to_mdev(ibdev),
 102                            mad_flags & IB_MAD_IGNORE_MKEY,
 103                            mad_flags & IB_MAD_IGNORE_BKEY,
 104                            port_num, in_wc, in_grh, in_mad, out_mad);
 105         if (err)
 106                 return IB_MAD_RESULT_FAILURE;
 107
 108         /* set return bit in status of directed route responses */
 109         if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
 110                 out_mad->mad_hdr.status |= cpu_to_be16(1 << 15);
 111
 112         if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS)
 113                 /* no response for trap repress */
 114                 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
 115
 116         return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
 117 }
 118
 119 int mlx5_query_ext_port_caps(struct mlx5_ib_dev *dev, u8 port)
 120 {
 121         struct ib_smp *in_mad  = NULL;
 122         struct ib_smp *out_mad = NULL;
 123         int err = -ENOMEM;
 124         u16 packet_error;
 125
 126         in_mad  = kzalloc(sizeof(*in_mad), GFP_KERNEL);
 127         out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
 128         if (!in_mad || !out_mad)
 129                 goto out;
 130
 131         init_query_mad(in_mad);
 132         in_mad->attr_id = MLX5_ATTR_EXTENDED_PORT_INFO;
 133         in_mad->attr_mod = cpu_to_be32(port);
 134
 135         err = mlx5_MAD_IFC(dev, 1, 1, 1, NULL, NULL, in_mad, out_mad);
 136
 137         packet_error = be16_to_cpu(out_mad->status);
 138
 139         dev->mdev->port_caps[port - 1].ext_port_cap = (!err && !packet_error) ?
 140                 MLX_EXT_PORT_CAP_FLAG_EXTENDED_PORT_INFO : 0;
 141
 142 out:
 143         kfree(in_mad);
 144         kfree(out_mad);
 145         return err;
 146 }
 147
 148 int mlx5_query_mad_ifc_smp_attr_node_info(struct ib_device *ibdev,
 149                                           struct ib_smp *out_mad)
 150 {
 151         struct ib_smp *in_mad = NULL;
 152         int err = -ENOMEM;
 153
 154         in_mad = kzalloc(sizeof(*in_mad), GFP_KERNEL);
 155         if (!in_mad)
 156                 return -ENOMEM;
 157
 158         init_query_mad(in_mad);
 159         in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
 160
 161         err = mlx5_MAD_IFC(to_mdev(ibdev), 1, 1, 1, NULL, NULL, in_mad,
 162                            out_mad);
 163
 164         kfree(in_mad);
 165         return err;
 166 }
 167
 168 int mlx5_query_mad_ifc_system_image_guid(struct ib_device *ibdev,
 169                                          __be64 *sys_image_guid)
 170 {
 171         struct ib_smp *out_mad = NULL;
 172         int err = -ENOMEM;
 173
 174         out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
 175         if (!out_mad)
 176                 return -ENOMEM;
 177
 178         err = mlx5_query_mad_ifc_smp_attr_node_info(ibdev, out_mad);
 179         if (err)
 180                 goto out;
 181
 182         memcpy(sys_image_guid, out_mad->data + 4, 8);
 183
 184 out:
 185         kfree(out_mad);
 186
 187         return err;
 188 }
 189
 190 int mlx5_query_mad_ifc_max_pkeys(struct ib_device *ibdev,
 191                                  u16 *max_pkeys)
 192 {
 193         struct ib_smp *out_mad = NULL;
 194         int err = -ENOMEM;
 195
 196         out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
 197         if (!out_mad)
 198                 return -ENOMEM;
 199
 200         err = mlx5_query_mad_ifc_smp_attr_node_info(ibdev, out_mad);
 201         if (err)
 202                 goto out;
 203
 204         *max_pkeys = be16_to_cpup((__be16 *)(out_mad->data + 28));
 205
 206 out:
 207         kfree(out_mad);
 208
 209         return err;
 210 }
 211
 212 int mlx5_query_mad_ifc_vendor_id(struct ib_device *ibdev,
 213                                  u32 *vendor_id)
 214 {
 215         struct ib_smp *out_mad = NULL;
 216         int err = -ENOMEM;
 217
 218         out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
 219         if (!out_mad)
 220                 return -ENOMEM;
 221
 222         err = mlx5_query_mad_ifc_smp_attr_node_info(ibdev, out_mad);
 223         if (err)
 224                 goto out;
 225
 226         *vendor_id = be32_to_cpup((__be32 *)(out_mad->data + 36)) & 0xffff;
 227
 228 out:
 229         kfree(out_mad);
 230
 231         return err;
 232 }
 233
 234 int mlx5_query_mad_ifc_node_desc(struct mlx5_ib_dev *dev, char *node_desc)
 235 {
 236         struct ib_smp *in_mad  = NULL;
 237         struct ib_smp *out_mad = NULL;
 238         int err = -ENOMEM;
 239
 240         in_mad  = kzalloc(sizeof(*in_mad), GFP_KERNEL);
 241         out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
 242         if (!in_mad || !out_mad)
 243                 goto out;
 244
 245         init_query_mad(in_mad);
 246         in_mad->attr_id = IB_SMP_ATTR_NODE_DESC;
 247
 248         err = mlx5_MAD_IFC(dev, 1, 1, 1, NULL, NULL, in_mad, out_mad);
 249         if (err)
 250                 goto out;
 251
 252         memcpy(node_desc, out_mad->data, 64);
 253 out:
 254         kfree(in_mad);
 255         kfree(out_mad);
 256         return err;
 257 }
 258
 259 int mlx5_query_mad_ifc_node_guid(struct mlx5_ib_dev *dev, __be64 *node_guid)
 260 {
 261         struct ib_smp *in_mad  = NULL;
 262         struct ib_smp *out_mad = NULL;
 263         int err = -ENOMEM;
 264
 265         in_mad  = kzalloc(sizeof(*in_mad), GFP_KERNEL);
 266         out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
 267         if (!in_mad || !out_mad)
 268                 goto out;
 269
 270         init_query_mad(in_mad);
 271         in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
 272
 273         err = mlx5_MAD_IFC(dev, 1, 1, 1, NULL, NULL, in_mad, out_mad);
 274         if (err)
 275                 goto out;
 276
 277         memcpy(node_guid, out_mad->data + 12, 8);
 278 out:
 279         kfree(in_mad);
 280         kfree(out_mad);
 281         return err;
 282 }
 283
 284 int mlx5_query_mad_ifc_pkey(struct ib_device *ibdev, u8 port, u16 index,
 285                             u16 *pkey)
 286 {
 287         struct ib_smp *in_mad  = NULL;
 288         struct ib_smp *out_mad = NULL;
 289         int err = -ENOMEM;
 290
 291         in_mad  = kzalloc(sizeof(*in_mad), GFP_KERNEL);
 292         out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
 293         if (!in_mad || !out_mad)
 294                 goto out;
 295
 296         init_query_mad(in_mad);
 297         in_mad->attr_id  = IB_SMP_ATTR_PKEY_TABLE;
 298         in_mad->attr_mod = cpu_to_be32(index / 32);
 299
 300         err = mlx5_MAD_IFC(to_mdev(ibdev), 1, 1, port, NULL, NULL, in_mad,
 301                            out_mad);
 302         if (err)
 303                 goto out;
 304
 305         *pkey = be16_to_cpu(((__be16 *)out_mad->data)[index % 32]);
 306
 307 out:
 308         kfree(in_mad);
 309         kfree(out_mad);
 310         return err;
 311 }
 312
 313 int mlx5_query_mad_ifc_gids(struct ib_device *ibdev, u8 port, int index,
 314                             union ib_gid *gid)
 315 {
 316         struct ib_smp *in_mad  = NULL;
 317         struct ib_smp *out_mad = NULL;
 318         int err = -ENOMEM;
 319
 320         in_mad  = kzalloc(sizeof(*in_mad), GFP_KERNEL);
 321         out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
 322         if (!in_mad || !out_mad)
 323                 goto out;
 324
 325         init_query_mad(in_mad);
 326         in_mad->attr_id  = IB_SMP_ATTR_PORT_INFO;
 327         in_mad->attr_mod = cpu_to_be32(port);
 328
 329         err = mlx5_MAD_IFC(to_mdev(ibdev), 1, 1, port, NULL, NULL, in_mad,
 330                            out_mad);
 331         if (err)
 332                 goto out;
 333
 334         memcpy(gid->raw, out_mad->data + 8, 8);
 335
 336         init_query_mad(in_mad);
 337         in_mad->attr_id  = IB_SMP_ATTR_GUID_INFO;
 338         in_mad->attr_mod = cpu_to_be32(index / 8);
 339
 340         err = mlx5_MAD_IFC(to_mdev(ibdev), 1, 1, port, NULL, NULL, in_mad,
 341                            out_mad);
 342         if (err)
 343                 goto out;
 344
 345         memcpy(gid->raw + 8, out_mad->data + (index % 8) * 8, 8);
 346
 347 out:
 348         kfree(in_mad);
 349         kfree(out_mad);
 350         return err;
 351 }
 352
 353 int mlx5_query_mad_ifc_port(struct ib_device *ibdev, u8 port,
 354                             struct ib_port_attr *props)
 355 {
 356         struct mlx5_ib_dev *dev = to_mdev(ibdev);
 357         struct mlx5_core_dev *mdev = dev->mdev;
 358         struct ib_smp *in_mad  = NULL;
 359         struct ib_smp *out_mad = NULL;
 360         int ext_active_speed;
 361         int err = -ENOMEM;
 362
 363         if (port < 1 || port > MLX5_CAP_GEN(mdev, num_ports)) {
 364                 mlx5_ib_warn(dev, "invalid port number %d\n", port);
 365                 return -EINVAL;
 366         }
 367
 368         in_mad  = kzalloc(sizeof(*in_mad), GFP_KERNEL);
 369         out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
 370         if (!in_mad || !out_mad)
 371                 goto out;
 372
 373         memset(props, 0, sizeof(*props));
 374
 375         init_query_mad(in_mad);
 376         in_mad->attr_id  = IB_SMP_ATTR_PORT_INFO;
 377         in_mad->attr_mod = cpu_to_be32(port);
 378
 379         err = mlx5_MAD_IFC(dev, 1, 1, port, NULL, NULL, in_mad, out_mad);
 380         if (err) {
 381                 mlx5_ib_warn(dev, "err %d\n", err);
 382                 goto out;
 383         }
 384
 385         props->lid              = be16_to_cpup((__be16 *)(out_mad->data + 16));
 386         props->lmc              = out_mad->data[34] & 0x7;
 387         props->sm_lid           = be16_to_cpup((__be16 *)(out_mad->data + 18));
 388         props->sm_sl            = out_mad->data[36] & 0xf;
 389         props->state            = out_mad->data[32] & 0xf;
 390         props->phys_state       = out_mad->data[33] >> 4;
 391         props->port_cap_flags   = be32_to_cpup((__be32 *)(out_mad->data + 20));
 392         props->gid_tbl_len      = out_mad->data[50];
 393         props->max_msg_sz       = 1 << MLX5_CAP_GEN(mdev, log_max_msg);
 394         props->pkey_tbl_len     = mdev->port_caps[port - 1].pkey_table_len;
 395         props->bad_pkey_cntr    = be16_to_cpup((__be16 *)(out_mad->data + 46));
 396         props->qkey_viol_cntr   = be16_to_cpup((__be16 *)(out_mad->data + 48));
 397         props->active_width     = out_mad->data[31] & 0xf;
 398         props->active_speed     = out_mad->data[35] >> 4;
 399         props->max_mtu          = out_mad->data[41] & 0xf;
 400         props->active_mtu       = out_mad->data[36] >> 4;
 401         props->subnet_timeout   = out_mad->data[51] & 0x1f;
 402         props->max_vl_num       = out_mad->data[37] >> 4;
 403         props->init_type_reply  = out_mad->data[41] >> 4;
 404
 405         /* Check if extended speeds (EDR/FDR/...) are supported */
 406         if (props->port_cap_flags & IB_PORT_EXTENDED_SPEEDS_SUP) {
 407                 ext_active_speed = out_mad->data[62] >> 4;
 408
 409                 switch (ext_active_speed) {
 410                 case 1:
 411                         props->active_speed = 16; /* FDR */
 412                         break;
 413                 case 2:
 414                         props->active_speed = 32; /* EDR */
 415                         break;
 416                 }
 417         }
 418
 419         /* If reported active speed is QDR, check if is FDR-10 */
 420         if (props->active_speed == 4) {
 421                 if (mdev->port_caps[port - 1].ext_port_cap &
 422                     MLX_EXT_PORT_CAP_FLAG_EXTENDED_PORT_INFO) {
 423                         init_query_mad(in_mad);
 424                         in_mad->attr_id = MLX5_ATTR_EXTENDED_PORT_INFO;
 425                         in_mad->attr_mod = cpu_to_be32(port);
 426
 427                         err = mlx5_MAD_IFC(dev, 1, 1, port,
 428                                            NULL, NULL, in_mad, out_mad);
 429                         if (err)
 430                                 goto out;
 431
 432                         /* Checking LinkSpeedActive for FDR-10 */
 433                         if (out_mad->data[15] & 0x1)
 434                                 props->active_speed = 8;
 435                 }
 436         }
 437
 438 out:
 439         kfree(in_mad);
 440         kfree(out_mad);
 441
 442         return err;
 443 }