drivers/infiniband/hw/mlx5/cmd.c

   1 /*
   2  * Copyright (c) 2017, 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 "cmd.h"
  34
  35 int mlx5_cmd_dump_fill_mkey(struct mlx5_core_dev *dev, u32 *mkey)
  36 {
  37         u32 out[MLX5_ST_SZ_DW(query_special_contexts_out)] = {0};
  38         u32 in[MLX5_ST_SZ_DW(query_special_contexts_in)]   = {0};
  39         int err;
  40
  41         MLX5_SET(query_special_contexts_in, in, opcode,
  42                  MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS);
  43         err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
  44         if (!err)
  45                 *mkey = MLX5_GET(query_special_contexts_out, out,
  46                                  dump_fill_mkey);
  47         return err;
  48 }
  49
  50 int mlx5_cmd_null_mkey(struct mlx5_core_dev *dev, u32 *null_mkey)
  51 {
  52         u32 out[MLX5_ST_SZ_DW(query_special_contexts_out)] = {};
  53         u32 in[MLX5_ST_SZ_DW(query_special_contexts_in)]   = {};
  54         int err;
  55
  56         MLX5_SET(query_special_contexts_in, in, opcode,
  57                  MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS);
  58         err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
  59         if (!err)
  60                 *null_mkey = MLX5_GET(query_special_contexts_out, out,
  61                                       null_mkey);
  62         return err;
  63 }
  64
  65 int mlx5_cmd_query_cong_params(struct mlx5_core_dev *dev, int cong_point,
  66                                void *out, int out_size)
  67 {
  68         u32 in[MLX5_ST_SZ_DW(query_cong_params_in)] = { };
  69
  70         MLX5_SET(query_cong_params_in, in, opcode,
  71                  MLX5_CMD_OP_QUERY_CONG_PARAMS);
  72         MLX5_SET(query_cong_params_in, in, cong_protocol, cong_point);
  73
  74         return mlx5_cmd_exec(dev, in, sizeof(in), out, out_size);
  75 }
  76
  77 int mlx5_cmd_modify_cong_params(struct mlx5_core_dev *dev,
  78                                 void *in, int in_size)
  79 {
  80         u32 out[MLX5_ST_SZ_DW(modify_cong_params_out)] = { };
  81
  82         return mlx5_cmd_exec(dev, in, in_size, out, sizeof(out));
  83 }
  84
  85 int mlx5_cmd_alloc_memic(struct mlx5_dm *dm, phys_addr_t *addr,
  86                          u64 length, u32 alignment)
  87 {
  88         struct mlx5_core_dev *dev = dm->dev;
  89         u64 num_memic_hw_pages = MLX5_CAP_DEV_MEM(dev, memic_bar_size)
  90                                         >> PAGE_SHIFT;
  91         u64 hw_start_addr = MLX5_CAP64_DEV_MEM(dev, memic_bar_start_addr);
  92         u32 max_alignment = MLX5_CAP_DEV_MEM(dev, log_max_memic_addr_alignment);
  93         u32 num_pages = DIV_ROUND_UP(length, PAGE_SIZE);
  94         u32 out[MLX5_ST_SZ_DW(alloc_memic_out)] = {};
  95         u32 in[MLX5_ST_SZ_DW(alloc_memic_in)] = {};
  96         u32 mlx5_alignment;
  97         u64 page_idx = 0;
  98         int ret = 0;
  99
 100         if (!length || (length & MLX5_MEMIC_ALLOC_SIZE_MASK))
 101                 return -EINVAL;
 102
 103         /* mlx5 device sets alignment as 64*2^driver_value
 104          * so normalizing is needed.
 105          */
 106         mlx5_alignment = (alignment < MLX5_MEMIC_BASE_ALIGN) ? 0 :
 107                          alignment - MLX5_MEMIC_BASE_ALIGN;
 108         if (mlx5_alignment > max_alignment)
 109                 return -EINVAL;
 110
 111         MLX5_SET(alloc_memic_in, in, opcode, MLX5_CMD_OP_ALLOC_MEMIC);
 112         MLX5_SET(alloc_memic_in, in, range_size, num_pages * PAGE_SIZE);
 113         MLX5_SET(alloc_memic_in, in, memic_size, length);
 114         MLX5_SET(alloc_memic_in, in, log_memic_addr_alignment,
 115                  mlx5_alignment);
 116
 117         while (page_idx < num_memic_hw_pages) {
 118                 spin_lock(&dm->lock);
 119                 page_idx = bitmap_find_next_zero_area(dm->memic_alloc_pages,
 120                                                       num_memic_hw_pages,
 121                                                       page_idx,
 122                                                       num_pages, 0);
 123
 124                 if (page_idx < num_memic_hw_pages)
 125                         bitmap_set(dm->memic_alloc_pages,
 126                                    page_idx, num_pages);
 127
 128                 spin_unlock(&dm->lock);
 129
 130                 if (page_idx >= num_memic_hw_pages)
 131                         break;
 132
 133                 MLX5_SET64(alloc_memic_in, in, range_start_addr,
 134                            hw_start_addr + (page_idx * PAGE_SIZE));
 135
 136                 ret = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
 137                 if (ret) {
 138                         spin_lock(&dm->lock);
 139                         bitmap_clear(dm->memic_alloc_pages,
 140                                      page_idx, num_pages);
 141                         spin_unlock(&dm->lock);
 142
 143                         if (ret == -EAGAIN) {
 144                                 page_idx++;
 145                                 continue;
 146                         }
 147
 148                         return ret;
 149                 }
 150
 151                 *addr = dev->bar_addr +
 152                         MLX5_GET64(alloc_memic_out, out, memic_start_addr);
 153
 154                 return 0;
 155         }
 156
 157         return -ENOMEM;
 158 }
 159
 160 int mlx5_cmd_dealloc_memic(struct mlx5_dm *dm, phys_addr_t addr, u64 length)
 161 {
 162         struct mlx5_core_dev *dev = dm->dev;
 163         u64 hw_start_addr = MLX5_CAP64_DEV_MEM(dev, memic_bar_start_addr);
 164         u32 num_pages = DIV_ROUND_UP(length, PAGE_SIZE);
 165         u32 out[MLX5_ST_SZ_DW(dealloc_memic_out)] = {0};
 166         u32 in[MLX5_ST_SZ_DW(dealloc_memic_in)] = {0};
 167         u64 start_page_idx;
 168         int err;
 169
 170         addr -= dev->bar_addr;
 171         start_page_idx = (addr - hw_start_addr) >> PAGE_SHIFT;
 172
 173         MLX5_SET(dealloc_memic_in, in, opcode, MLX5_CMD_OP_DEALLOC_MEMIC);
 174         MLX5_SET64(dealloc_memic_in, in, memic_start_addr, addr);
 175         MLX5_SET(dealloc_memic_in, in, memic_size, length);
 176
 177         err =  mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
 178
 179         if (!err) {
 180                 spin_lock(&dm->lock);
 181                 bitmap_clear(dm->memic_alloc_pages,
 182                              start_page_idx, num_pages);
 183                 spin_unlock(&dm->lock);
 184         }
 185
 186         return err;
 187 }
 188
 189 int mlx5_cmd_alloc_sw_icm(struct mlx5_dm *dm, int type, u64 length,
 190                           u16 uid, phys_addr_t *addr, u32 *obj_id)
 191 {
 192         struct mlx5_core_dev *dev = dm->dev;
 193         u32 num_blocks = DIV_ROUND_UP(length, MLX5_SW_ICM_BLOCK_SIZE(dev));
 194         u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)] = {};
 195         u32 in[MLX5_ST_SZ_DW(create_sw_icm_in)] = {};
 196         unsigned long *block_map;
 197         u64 icm_start_addr;
 198         u32 log_icm_size;
 199         u32 max_blocks;
 200         u64 block_idx;
 201         void *sw_icm;
 202         int ret;
 203
 204         MLX5_SET(general_obj_in_cmd_hdr, in, opcode,
 205                  MLX5_CMD_OP_CREATE_GENERAL_OBJECT);
 206         MLX5_SET(general_obj_in_cmd_hdr, in, obj_type, MLX5_OBJ_TYPE_SW_ICM);
 207         MLX5_SET(general_obj_in_cmd_hdr, in, uid, uid);
 208
 209         switch (type) {
 210         case MLX5_IB_UAPI_DM_TYPE_STEERING_SW_ICM:
 211                 icm_start_addr = MLX5_CAP64_DEV_MEM(dev,
 212                                                 steering_sw_icm_start_address);
 213                 log_icm_size = MLX5_CAP_DEV_MEM(dev, log_steering_sw_icm_size);
 214                 block_map = dm->steering_sw_icm_alloc_blocks;
 215                 break;
 216         case MLX5_IB_UAPI_DM_TYPE_HEADER_MODIFY_SW_ICM:
 217                 icm_start_addr = MLX5_CAP64_DEV_MEM(dev,
 218                                         header_modify_sw_icm_start_address);
 219                 log_icm_size = MLX5_CAP_DEV_MEM(dev,
 220                                                 log_header_modify_sw_icm_size);
 221                 block_map = dm->header_modify_sw_icm_alloc_blocks;
 222                 break;
 223         default:
 224                 return -EINVAL;
 225         }
 226
 227         max_blocks = BIT(log_icm_size - MLX5_LOG_SW_ICM_BLOCK_SIZE(dev));
 228         spin_lock(&dm->lock);
 229         block_idx = bitmap_find_next_zero_area(block_map,
 230                                                max_blocks,
 231                                                0,
 232                                                num_blocks, 0);
 233
 234         if (block_idx < max_blocks)
 235                 bitmap_set(block_map,
 236                            block_idx, num_blocks);
 237
 238         spin_unlock(&dm->lock);
 239
 240         if (block_idx >= max_blocks)
 241                 return -ENOMEM;
 242
 243         sw_icm = MLX5_ADDR_OF(create_sw_icm_in, in, sw_icm);
 244         icm_start_addr += block_idx << MLX5_LOG_SW_ICM_BLOCK_SIZE(dev);
 245         MLX5_SET64(sw_icm, sw_icm, sw_icm_start_addr,
 246                    icm_start_addr);
 247         MLX5_SET(sw_icm, sw_icm, log_sw_icm_size, ilog2(length));
 248
 249         ret = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
 250         if (ret) {
 251                 spin_lock(&dm->lock);
 252                 bitmap_clear(block_map,
 253                              block_idx, num_blocks);
 254                 spin_unlock(&dm->lock);
 255
 256                 return ret;
 257         }
 258
 259         *addr = icm_start_addr;
 260         *obj_id = MLX5_GET(general_obj_out_cmd_hdr, out, obj_id);
 261
 262         return 0;
 263 }
 264
 265 int mlx5_cmd_dealloc_sw_icm(struct mlx5_dm *dm, int type, u64 length,
 266                             u16 uid, phys_addr_t addr, u32 obj_id)
 267 {
 268         struct mlx5_core_dev *dev = dm->dev;
 269         u32 num_blocks = DIV_ROUND_UP(length, MLX5_SW_ICM_BLOCK_SIZE(dev));
 270         u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)] = {};
 271         u32 in[MLX5_ST_SZ_DW(general_obj_in_cmd_hdr)] = {};
 272         unsigned long *block_map;
 273         u64 start_idx;
 274         int err;
 275
 276         switch (type) {
 277         case MLX5_IB_UAPI_DM_TYPE_STEERING_SW_ICM:
 278                 start_idx =
 279                         (addr - MLX5_CAP64_DEV_MEM(
 280                                         dev, steering_sw_icm_start_address)) >>
 281                         MLX5_LOG_SW_ICM_BLOCK_SIZE(dev);
 282                 block_map = dm->steering_sw_icm_alloc_blocks;
 283                 break;
 284         case MLX5_IB_UAPI_DM_TYPE_HEADER_MODIFY_SW_ICM:
 285                 start_idx =
 286                         (addr -
 287                          MLX5_CAP64_DEV_MEM(
 288                                  dev, header_modify_sw_icm_start_address)) >>
 289                         MLX5_LOG_SW_ICM_BLOCK_SIZE(dev);
 290                 block_map = dm->header_modify_sw_icm_alloc_blocks;
 291                 break;
 292         default:
 293                 return -EINVAL;
 294         }
 295
 296         MLX5_SET(general_obj_in_cmd_hdr, in, opcode,
 297                  MLX5_CMD_OP_DESTROY_GENERAL_OBJECT);
 298         MLX5_SET(general_obj_in_cmd_hdr, in, obj_type, MLX5_OBJ_TYPE_SW_ICM);
 299         MLX5_SET(general_obj_in_cmd_hdr, in, obj_id, obj_id);
 300         MLX5_SET(general_obj_in_cmd_hdr, in, uid, uid);
 301
 302         err =  mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
 303         if (err)
 304                 return err;
 305
 306         spin_lock(&dm->lock);
 307         bitmap_clear(block_map,
 308                      start_idx, num_blocks);
 309         spin_unlock(&dm->lock);
 310
 311         return 0;
 312 }
 313
 314 int mlx5_cmd_query_ext_ppcnt_counters(struct mlx5_core_dev *dev, void *out)
 315 {
 316         u32 in[MLX5_ST_SZ_DW(ppcnt_reg)] = {};
 317         int sz = MLX5_ST_SZ_BYTES(ppcnt_reg);
 318
 319         MLX5_SET(ppcnt_reg, in, local_port, 1);
 320
 321         MLX5_SET(ppcnt_reg, in, grp, MLX5_ETHERNET_EXTENDED_COUNTERS_GROUP);
 322         return  mlx5_core_access_reg(dev, in, sz, out, sz, MLX5_REG_PPCNT,
 323                                      0, 0);
 324 }
 325
 326 void mlx5_cmd_destroy_tir(struct mlx5_core_dev *dev, u32 tirn, u16 uid)
 327 {
 328         u32 in[MLX5_ST_SZ_DW(destroy_tir_in)]   = {};
 329         u32 out[MLX5_ST_SZ_DW(destroy_tir_out)] = {};
 330
 331         MLX5_SET(destroy_tir_in, in, opcode, MLX5_CMD_OP_DESTROY_TIR);
 332         MLX5_SET(destroy_tir_in, in, tirn, tirn);
 333         MLX5_SET(destroy_tir_in, in, uid, uid);
 334         mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
 335 }
 336
 337 void mlx5_cmd_destroy_tis(struct mlx5_core_dev *dev, u32 tisn, u16 uid)
 338 {
 339         u32 in[MLX5_ST_SZ_DW(destroy_tis_in)]   = {0};
 340         u32 out[MLX5_ST_SZ_DW(destroy_tis_out)] = {0};
 341
 342         MLX5_SET(destroy_tis_in, in, opcode, MLX5_CMD_OP_DESTROY_TIS);
 343         MLX5_SET(destroy_tis_in, in, tisn, tisn);
 344         MLX5_SET(destroy_tis_in, in, uid, uid);
 345         mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
 346 }
 347
 348 void mlx5_cmd_destroy_rqt(struct mlx5_core_dev *dev, u32 rqtn, u16 uid)
 349 {
 350         u32 in[MLX5_ST_SZ_DW(destroy_rqt_in)]   = {};
 351         u32 out[MLX5_ST_SZ_DW(destroy_rqt_out)] = {};
 352
 353         MLX5_SET(destroy_rqt_in, in, opcode, MLX5_CMD_OP_DESTROY_RQT);
 354         MLX5_SET(destroy_rqt_in, in, rqtn, rqtn);
 355         MLX5_SET(destroy_rqt_in, in, uid, uid);
 356         mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
 357 }
 358
 359 int mlx5_cmd_alloc_transport_domain(struct mlx5_core_dev *dev, u32 *tdn,
 360                                     u16 uid)
 361 {
 362         u32 in[MLX5_ST_SZ_DW(alloc_transport_domain_in)]   = {0};
 363         u32 out[MLX5_ST_SZ_DW(alloc_transport_domain_out)] = {0};
 364         int err;
 365
 366         MLX5_SET(alloc_transport_domain_in, in, opcode,
 367                  MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN);
 368         MLX5_SET(alloc_transport_domain_in, in, uid, uid);
 369
 370         err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
 371         if (!err)
 372                 *tdn = MLX5_GET(alloc_transport_domain_out, out,
 373                                 transport_domain);
 374
 375         return err;
 376 }
 377
 378 void mlx5_cmd_dealloc_transport_domain(struct mlx5_core_dev *dev, u32 tdn,
 379                                        u16 uid)
 380 {
 381         u32 in[MLX5_ST_SZ_DW(dealloc_transport_domain_in)]   = {0};
 382         u32 out[MLX5_ST_SZ_DW(dealloc_transport_domain_out)] = {0};
 383
 384         MLX5_SET(dealloc_transport_domain_in, in, opcode,
 385                  MLX5_CMD_OP_DEALLOC_TRANSPORT_DOMAIN);
 386         MLX5_SET(dealloc_transport_domain_in, in, uid, uid);
 387         MLX5_SET(dealloc_transport_domain_in, in, transport_domain, tdn);
 388         mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
 389 }
 390
 391 void mlx5_cmd_dealloc_pd(struct mlx5_core_dev *dev, u32 pdn, u16 uid)
 392 {
 393         u32 out[MLX5_ST_SZ_DW(dealloc_pd_out)] = {};
 394         u32 in[MLX5_ST_SZ_DW(dealloc_pd_in)]   = {};
 395
 396         MLX5_SET(dealloc_pd_in, in, opcode, MLX5_CMD_OP_DEALLOC_PD);
 397         MLX5_SET(dealloc_pd_in, in, pd, pdn);
 398         MLX5_SET(dealloc_pd_in, in, uid, uid);
 399         mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
 400 }
 401
 402 int mlx5_cmd_attach_mcg(struct mlx5_core_dev *dev, union ib_gid *mgid,
 403                         u32 qpn, u16 uid)
 404 {
 405         u32 out[MLX5_ST_SZ_DW(attach_to_mcg_out)] = {};
 406         u32 in[MLX5_ST_SZ_DW(attach_to_mcg_in)]   = {};
 407         void *gid;
 408
 409         MLX5_SET(attach_to_mcg_in, in, opcode, MLX5_CMD_OP_ATTACH_TO_MCG);
 410         MLX5_SET(attach_to_mcg_in, in, qpn, qpn);
 411         MLX5_SET(attach_to_mcg_in, in, uid, uid);
 412         gid = MLX5_ADDR_OF(attach_to_mcg_in, in, multicast_gid);
 413         memcpy(gid, mgid, sizeof(*mgid));
 414         return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
 415 }
 416
 417 int mlx5_cmd_detach_mcg(struct mlx5_core_dev *dev, union ib_gid *mgid,
 418                         u32 qpn, u16 uid)
 419 {
 420         u32 out[MLX5_ST_SZ_DW(detach_from_mcg_out)] = {};
 421         u32 in[MLX5_ST_SZ_DW(detach_from_mcg_in)]   = {};
 422         void *gid;
 423
 424         MLX5_SET(detach_from_mcg_in, in, opcode, MLX5_CMD_OP_DETACH_FROM_MCG);
 425         MLX5_SET(detach_from_mcg_in, in, qpn, qpn);
 426         MLX5_SET(detach_from_mcg_in, in, uid, uid);
 427         gid = MLX5_ADDR_OF(detach_from_mcg_in, in, multicast_gid);
 428         memcpy(gid, mgid, sizeof(*mgid));
 429         return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
 430 }
 431
 432 int mlx5_cmd_xrcd_alloc(struct mlx5_core_dev *dev, u32 *xrcdn, u16 uid)
 433 {
 434         u32 out[MLX5_ST_SZ_DW(alloc_xrcd_out)] = {};
 435         u32 in[MLX5_ST_SZ_DW(alloc_xrcd_in)]   = {};
 436         int err;
 437
 438         MLX5_SET(alloc_xrcd_in, in, opcode, MLX5_CMD_OP_ALLOC_XRCD);
 439         MLX5_SET(alloc_xrcd_in, in, uid, uid);
 440         err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
 441         if (!err)
 442                 *xrcdn = MLX5_GET(alloc_xrcd_out, out, xrcd);
 443         return err;
 444 }
 445
 446 int mlx5_cmd_xrcd_dealloc(struct mlx5_core_dev *dev, u32 xrcdn, u16 uid)
 447 {
 448         u32 out[MLX5_ST_SZ_DW(dealloc_xrcd_out)] = {};
 449         u32 in[MLX5_ST_SZ_DW(dealloc_xrcd_in)]   = {};
 450
 451         MLX5_SET(dealloc_xrcd_in, in, opcode, MLX5_CMD_OP_DEALLOC_XRCD);
 452         MLX5_SET(dealloc_xrcd_in, in, xrcd, xrcdn);
 453         MLX5_SET(dealloc_xrcd_in, in, uid, uid);
 454         return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
 455 }
 456
 457 int mlx5_cmd_alloc_q_counter(struct mlx5_core_dev *dev, u16 *counter_id,
 458                              u16 uid)
 459 {
 460         u32 in[MLX5_ST_SZ_DW(alloc_q_counter_in)]   = {0};
 461         u32 out[MLX5_ST_SZ_DW(alloc_q_counter_out)] = {0};
 462         int err;
 463
 464         MLX5_SET(alloc_q_counter_in, in, opcode, MLX5_CMD_OP_ALLOC_Q_COUNTER);
 465         MLX5_SET(alloc_q_counter_in, in, uid, uid);
 466
 467         err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
 468         if (!err)
 469                 *counter_id = MLX5_GET(alloc_q_counter_out, out,
 470                                        counter_set_id);
 471         return err;
 472 }
 473
 474 int mlx5_cmd_mad_ifc(struct mlx5_core_dev *dev, const void *inb, void *outb,
 475                      u16 opmod, u8 port)
 476 {
 477         int outlen = MLX5_ST_SZ_BYTES(mad_ifc_out);
 478         int inlen = MLX5_ST_SZ_BYTES(mad_ifc_in);
 479         int err = -ENOMEM;
 480         void *data;
 481         void *resp;
 482         u32 *out;
 483         u32 *in;
 484
 485         in = kzalloc(inlen, GFP_KERNEL);
 486         out = kzalloc(outlen, GFP_KERNEL);
 487         if (!in || !out)
 488                 goto out;
 489
 490         MLX5_SET(mad_ifc_in, in, opcode, MLX5_CMD_OP_MAD_IFC);
 491         MLX5_SET(mad_ifc_in, in, op_mod, opmod);
 492         MLX5_SET(mad_ifc_in, in, port, port);
 493
 494         data = MLX5_ADDR_OF(mad_ifc_in, in, mad);
 495         memcpy(data, inb, MLX5_FLD_SZ_BYTES(mad_ifc_in, mad));
 496
 497         err = mlx5_cmd_exec(dev, in, inlen, out, outlen);
 498         if (err)
 499                 goto out;
 500
 501         resp = MLX5_ADDR_OF(mad_ifc_out, out, response_mad_packet);
 502         memcpy(outb, resp,
 503                MLX5_FLD_SZ_BYTES(mad_ifc_out, response_mad_packet));
 504
 505 out:
 506         kfree(out);
 507         kfree(in);
 508         return err;
 509 }