drivers/infiniband/hw/mlx5/devx.c

   1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
   2 /*
   3  * Copyright (c) 2018, Mellanox Technologies inc.  All rights reserved.
   4  */
   5
   6 #include <rdma/ib_user_verbs.h>
   7 #include <rdma/ib_verbs.h>
   8 #include <rdma/uverbs_types.h>
   9 #include <rdma/uverbs_ioctl.h>
  10 #include <rdma/mlx5_user_ioctl_cmds.h>
  11 #include <rdma/ib_umem.h>
  12 #include <linux/mlx5/driver.h>
  13 #include <linux/mlx5/fs.h>
  14 #include "mlx5_ib.h"
  15
  16 #define UVERBS_MODULE_NAME mlx5_ib
  17 #include <rdma/uverbs_named_ioctl.h>
  18
  19 #define MLX5_MAX_DESTROY_INBOX_SIZE_DW MLX5_ST_SZ_DW(delete_fte_in)
  20 struct devx_obj {
  21         struct mlx5_core_dev    *mdev;
  22         u32                     obj_id;
  23         u32                     dinlen; /* destroy inbox length */
  24         u32                     dinbox[MLX5_MAX_DESTROY_INBOX_SIZE_DW];
  25 };
  26
  27 struct devx_umem {
  28         struct mlx5_core_dev            *mdev;
  29         struct ib_umem                  *umem;
  30         u32                             page_offset;
  31         int                             page_shift;
  32         int                             ncont;
  33         u32                             dinlen;
  34         u32                             dinbox[MLX5_ST_SZ_DW(general_obj_in_cmd_hdr)];
  35 };
  36
  37 struct devx_umem_reg_cmd {
  38         void                            *in;
  39         u32                             inlen;
  40         u32                             out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
  41 };
  42
  43 static struct mlx5_ib_ucontext *devx_ufile2uctx(struct ib_uverbs_file *file)
  44 {
  45         return to_mucontext(ib_uverbs_get_ucontext(file));
  46 }
  47
  48 int mlx5_ib_devx_create(struct mlx5_ib_dev *dev, struct mlx5_ib_ucontext *context)
  49 {
  50         u32 in[MLX5_ST_SZ_DW(create_uctx_in)] = {0};
  51         u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)] = {0};
  52         u64 general_obj_types;
  53         void *hdr;
  54         int err;
  55
  56         hdr = MLX5_ADDR_OF(create_uctx_in, in, hdr);
  57
  58         general_obj_types = MLX5_CAP_GEN_64(dev->mdev, general_obj_types);
  59         if (!(general_obj_types & MLX5_GENERAL_OBJ_TYPES_CAP_UCTX) ||
  60             !(general_obj_types & MLX5_GENERAL_OBJ_TYPES_CAP_UMEM))
  61                 return -EINVAL;
  62
  63         if (!capable(CAP_NET_RAW))
  64                 return -EPERM;
  65
  66         MLX5_SET(general_obj_in_cmd_hdr, hdr, opcode, MLX5_CMD_OP_CREATE_GENERAL_OBJECT);
  67         MLX5_SET(general_obj_in_cmd_hdr, hdr, obj_type, MLX5_OBJ_TYPE_UCTX);
  68
  69         err = mlx5_cmd_exec(dev->mdev, in, sizeof(in), out, sizeof(out));
  70         if (err)
  71                 return err;
  72
  73         context->devx_uid = MLX5_GET(general_obj_out_cmd_hdr, out, obj_id);
  74         return 0;
  75 }
  76
  77 void mlx5_ib_devx_destroy(struct mlx5_ib_dev *dev,
  78                           struct mlx5_ib_ucontext *context)
  79 {
  80         u32 in[MLX5_ST_SZ_DW(general_obj_in_cmd_hdr)] = {0};
  81         u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)] = {0};
  82
  83         MLX5_SET(general_obj_in_cmd_hdr, in, opcode, MLX5_CMD_OP_DESTROY_GENERAL_OBJECT);
  84         MLX5_SET(general_obj_in_cmd_hdr, in, obj_type, MLX5_OBJ_TYPE_UCTX);
  85         MLX5_SET(general_obj_in_cmd_hdr, in, obj_id, context->devx_uid);
  86
  87         mlx5_cmd_exec(dev->mdev, in, sizeof(in), out, sizeof(out));
  88 }
  89
  90 static int devx_is_valid_obj_id(struct devx_obj *obj, const void *in)
  91 {
  92         u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
  93         u32 obj_id;
  94
  95         switch (opcode) {
  96         case MLX5_CMD_OP_MODIFY_GENERAL_OBJECT:
  97         case MLX5_CMD_OP_QUERY_GENERAL_OBJECT:
  98                 obj_id = MLX5_GET(general_obj_in_cmd_hdr, in, obj_id);
  99                 break;
 100         case MLX5_CMD_OP_QUERY_MKEY:
 101                 obj_id = MLX5_GET(query_mkey_in, in, mkey_index);
 102                 break;
 103         case MLX5_CMD_OP_QUERY_CQ:
 104                 obj_id = MLX5_GET(query_cq_in, in, cqn);
 105                 break;
 106         case MLX5_CMD_OP_MODIFY_CQ:
 107                 obj_id = MLX5_GET(modify_cq_in, in, cqn);
 108                 break;
 109         case MLX5_CMD_OP_QUERY_SQ:
 110                 obj_id = MLX5_GET(query_sq_in, in, sqn);
 111                 break;
 112         case MLX5_CMD_OP_MODIFY_SQ:
 113                 obj_id = MLX5_GET(modify_sq_in, in, sqn);
 114                 break;
 115         case MLX5_CMD_OP_QUERY_RQ:
 116                 obj_id = MLX5_GET(query_rq_in, in, rqn);
 117                 break;
 118         case MLX5_CMD_OP_MODIFY_RQ:
 119                 obj_id = MLX5_GET(modify_rq_in, in, rqn);
 120                 break;
 121         case MLX5_CMD_OP_QUERY_RMP:
 122                 obj_id = MLX5_GET(query_rmp_in, in, rmpn);
 123                 break;
 124         case MLX5_CMD_OP_MODIFY_RMP:
 125                 obj_id = MLX5_GET(modify_rmp_in, in, rmpn);
 126                 break;
 127         case MLX5_CMD_OP_QUERY_RQT:
 128                 obj_id = MLX5_GET(query_rqt_in, in, rqtn);
 129                 break;
 130         case MLX5_CMD_OP_MODIFY_RQT:
 131                 obj_id = MLX5_GET(modify_rqt_in, in, rqtn);
 132                 break;
 133         case MLX5_CMD_OP_QUERY_TIR:
 134                 obj_id = MLX5_GET(query_tir_in, in, tirn);
 135                 break;
 136         case MLX5_CMD_OP_MODIFY_TIR:
 137                 obj_id = MLX5_GET(modify_tir_in, in, tirn);
 138                 break;
 139         case MLX5_CMD_OP_QUERY_TIS:
 140                 obj_id = MLX5_GET(query_tis_in, in, tisn);
 141                 break;
 142         case MLX5_CMD_OP_MODIFY_TIS:
 143                 obj_id = MLX5_GET(modify_tis_in, in, tisn);
 144                 break;
 145         case MLX5_CMD_OP_QUERY_FLOW_TABLE:
 146                 obj_id = MLX5_GET(query_flow_table_in, in, table_id);
 147                 break;
 148         case MLX5_CMD_OP_MODIFY_FLOW_TABLE:
 149                 obj_id = MLX5_GET(modify_flow_table_in, in, table_id);
 150                 break;
 151         case MLX5_CMD_OP_QUERY_FLOW_GROUP:
 152                 obj_id = MLX5_GET(query_flow_group_in, in, group_id);
 153                 break;
 154         case MLX5_CMD_OP_QUERY_FLOW_TABLE_ENTRY:
 155                 obj_id = MLX5_GET(query_fte_in, in, flow_index);
 156                 break;
 157         case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
 158                 obj_id = MLX5_GET(set_fte_in, in, flow_index);
 159                 break;
 160         case MLX5_CMD_OP_QUERY_Q_COUNTER:
 161                 obj_id = MLX5_GET(query_q_counter_in, in, counter_set_id);
 162                 break;
 163         case MLX5_CMD_OP_QUERY_FLOW_COUNTER:
 164                 obj_id = MLX5_GET(query_flow_counter_in, in, flow_counter_id);
 165                 break;
 166         case MLX5_CMD_OP_QUERY_MODIFY_HEADER_CONTEXT:
 167                 obj_id = MLX5_GET(general_obj_in_cmd_hdr, in, obj_id);
 168                 break;
 169         case MLX5_CMD_OP_QUERY_SCHEDULING_ELEMENT:
 170                 obj_id = MLX5_GET(query_scheduling_element_in, in,
 171                                   scheduling_element_id);
 172                 break;
 173         case MLX5_CMD_OP_MODIFY_SCHEDULING_ELEMENT:
 174                 obj_id = MLX5_GET(modify_scheduling_element_in, in,
 175                                   scheduling_element_id);
 176                 break;
 177         case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
 178                 obj_id = MLX5_GET(add_vxlan_udp_dport_in, in, vxlan_udp_port);
 179                 break;
 180         case MLX5_CMD_OP_QUERY_L2_TABLE_ENTRY:
 181                 obj_id = MLX5_GET(query_l2_table_entry_in, in, table_index);
 182                 break;
 183         case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
 184                 obj_id = MLX5_GET(set_l2_table_entry_in, in, table_index);
 185                 break;
 186         case MLX5_CMD_OP_QUERY_QP:
 187                 obj_id = MLX5_GET(query_qp_in, in, qpn);
 188                 break;
 189         case MLX5_CMD_OP_RST2INIT_QP:
 190                 obj_id = MLX5_GET(rst2init_qp_in, in, qpn);
 191                 break;
 192         case MLX5_CMD_OP_INIT2RTR_QP:
 193                 obj_id = MLX5_GET(init2rtr_qp_in, in, qpn);
 194                 break;
 195         case MLX5_CMD_OP_RTR2RTS_QP:
 196                 obj_id = MLX5_GET(rtr2rts_qp_in, in, qpn);
 197                 break;
 198         case MLX5_CMD_OP_RTS2RTS_QP:
 199                 obj_id = MLX5_GET(rts2rts_qp_in, in, qpn);
 200                 break;
 201         case MLX5_CMD_OP_SQERR2RTS_QP:
 202                 obj_id = MLX5_GET(sqerr2rts_qp_in, in, qpn);
 203                 break;
 204         case MLX5_CMD_OP_2ERR_QP:
 205                 obj_id = MLX5_GET(qp_2err_in, in, qpn);
 206                 break;
 207         case MLX5_CMD_OP_2RST_QP:
 208                 obj_id = MLX5_GET(qp_2rst_in, in, qpn);
 209                 break;
 210         case MLX5_CMD_OP_QUERY_DCT:
 211                 obj_id = MLX5_GET(query_dct_in, in, dctn);
 212                 break;
 213         case MLX5_CMD_OP_QUERY_XRQ:
 214                 obj_id = MLX5_GET(query_xrq_in, in, xrqn);
 215                 break;
 216         case MLX5_CMD_OP_QUERY_XRC_SRQ:
 217                 obj_id = MLX5_GET(query_xrc_srq_in, in, xrc_srqn);
 218                 break;
 219         case MLX5_CMD_OP_ARM_XRC_SRQ:
 220                 obj_id = MLX5_GET(arm_xrc_srq_in, in, xrc_srqn);
 221                 break;
 222         case MLX5_CMD_OP_QUERY_SRQ:
 223                 obj_id = MLX5_GET(query_srq_in, in, srqn);
 224                 break;
 225         case MLX5_CMD_OP_ARM_RQ:
 226                 obj_id = MLX5_GET(arm_rq_in, in, srq_number);
 227                 break;
 228         case MLX5_CMD_OP_DRAIN_DCT:
 229         case MLX5_CMD_OP_ARM_DCT_FOR_KEY_VIOLATION:
 230                 obj_id = MLX5_GET(drain_dct_in, in, dctn);
 231                 break;
 232         case MLX5_CMD_OP_ARM_XRQ:
 233                 obj_id = MLX5_GET(arm_xrq_in, in, xrqn);
 234                 break;
 235         default:
 236                 return false;
 237         }
 238
 239         if (obj_id == obj->obj_id)
 240                 return true;
 241
 242         return false;
 243 }
 244
 245 static bool devx_is_obj_create_cmd(const void *in)
 246 {
 247         u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
 248
 249         switch (opcode) {
 250         case MLX5_CMD_OP_CREATE_GENERAL_OBJECT:
 251         case MLX5_CMD_OP_CREATE_MKEY:
 252         case MLX5_CMD_OP_CREATE_CQ:
 253         case MLX5_CMD_OP_ALLOC_PD:
 254         case MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN:
 255         case MLX5_CMD_OP_CREATE_RMP:
 256         case MLX5_CMD_OP_CREATE_SQ:
 257         case MLX5_CMD_OP_CREATE_RQ:
 258         case MLX5_CMD_OP_CREATE_RQT:
 259         case MLX5_CMD_OP_CREATE_TIR:
 260         case MLX5_CMD_OP_CREATE_TIS:
 261         case MLX5_CMD_OP_ALLOC_Q_COUNTER:
 262         case MLX5_CMD_OP_CREATE_FLOW_TABLE:
 263         case MLX5_CMD_OP_CREATE_FLOW_GROUP:
 264         case MLX5_CMD_OP_ALLOC_FLOW_COUNTER:
 265         case MLX5_CMD_OP_ALLOC_ENCAP_HEADER:
 266         case MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT:
 267         case MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT:
 268         case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
 269         case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
 270         case MLX5_CMD_OP_CREATE_QP:
 271         case MLX5_CMD_OP_CREATE_SRQ:
 272         case MLX5_CMD_OP_CREATE_XRC_SRQ:
 273         case MLX5_CMD_OP_CREATE_DCT:
 274         case MLX5_CMD_OP_CREATE_XRQ:
 275         case MLX5_CMD_OP_ATTACH_TO_MCG:
 276         case MLX5_CMD_OP_ALLOC_XRCD:
 277                 return true;
 278         case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
 279         {
 280                 u16 op_mod = MLX5_GET(set_fte_in, in, op_mod);
 281                 if (op_mod == 0)
 282                         return true;
 283                 return false;
 284         }
 285         default:
 286                 return false;
 287         }
 288 }
 289
 290 static bool devx_is_obj_modify_cmd(const void *in)
 291 {
 292         u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
 293
 294         switch (opcode) {
 295         case MLX5_CMD_OP_MODIFY_GENERAL_OBJECT:
 296         case MLX5_CMD_OP_MODIFY_CQ:
 297         case MLX5_CMD_OP_MODIFY_RMP:
 298         case MLX5_CMD_OP_MODIFY_SQ:
 299         case MLX5_CMD_OP_MODIFY_RQ:
 300         case MLX5_CMD_OP_MODIFY_RQT:
 301         case MLX5_CMD_OP_MODIFY_TIR:
 302         case MLX5_CMD_OP_MODIFY_TIS:
 303         case MLX5_CMD_OP_MODIFY_FLOW_TABLE:
 304         case MLX5_CMD_OP_MODIFY_SCHEDULING_ELEMENT:
 305         case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
 306         case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
 307         case MLX5_CMD_OP_RST2INIT_QP:
 308         case MLX5_CMD_OP_INIT2RTR_QP:
 309         case MLX5_CMD_OP_RTR2RTS_QP:
 310         case MLX5_CMD_OP_RTS2RTS_QP:
 311         case MLX5_CMD_OP_SQERR2RTS_QP:
 312         case MLX5_CMD_OP_2ERR_QP:
 313         case MLX5_CMD_OP_2RST_QP:
 314         case MLX5_CMD_OP_ARM_XRC_SRQ:
 315         case MLX5_CMD_OP_ARM_RQ:
 316         case MLX5_CMD_OP_DRAIN_DCT:
 317         case MLX5_CMD_OP_ARM_DCT_FOR_KEY_VIOLATION:
 318         case MLX5_CMD_OP_ARM_XRQ:
 319                 return true;
 320         case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
 321         {
 322                 u16 op_mod = MLX5_GET(set_fte_in, in, op_mod);
 323
 324                 if (op_mod == 1)
 325                         return true;
 326                 return false;
 327         }
 328         default:
 329                 return false;
 330         }
 331 }
 332
 333 static bool devx_is_obj_query_cmd(const void *in)
 334 {
 335         u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
 336
 337         switch (opcode) {
 338         case MLX5_CMD_OP_QUERY_GENERAL_OBJECT:
 339         case MLX5_CMD_OP_QUERY_MKEY:
 340         case MLX5_CMD_OP_QUERY_CQ:
 341         case MLX5_CMD_OP_QUERY_RMP:
 342         case MLX5_CMD_OP_QUERY_SQ:
 343         case MLX5_CMD_OP_QUERY_RQ:
 344         case MLX5_CMD_OP_QUERY_RQT:
 345         case MLX5_CMD_OP_QUERY_TIR:
 346         case MLX5_CMD_OP_QUERY_TIS:
 347         case MLX5_CMD_OP_QUERY_Q_COUNTER:
 348         case MLX5_CMD_OP_QUERY_FLOW_TABLE:
 349         case MLX5_CMD_OP_QUERY_FLOW_GROUP:
 350         case MLX5_CMD_OP_QUERY_FLOW_TABLE_ENTRY:
 351         case MLX5_CMD_OP_QUERY_FLOW_COUNTER:
 352         case MLX5_CMD_OP_QUERY_MODIFY_HEADER_CONTEXT:
 353         case MLX5_CMD_OP_QUERY_SCHEDULING_ELEMENT:
 354         case MLX5_CMD_OP_QUERY_L2_TABLE_ENTRY:
 355         case MLX5_CMD_OP_QUERY_QP:
 356         case MLX5_CMD_OP_QUERY_SRQ:
 357         case MLX5_CMD_OP_QUERY_XRC_SRQ:
 358         case MLX5_CMD_OP_QUERY_DCT:
 359         case MLX5_CMD_OP_QUERY_XRQ:
 360                 return true;
 361         default:
 362                 return false;
 363         }
 364 }
 365
 366 static bool devx_is_general_cmd(void *in)
 367 {
 368         u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
 369
 370         switch (opcode) {
 371         case MLX5_CMD_OP_QUERY_HCA_CAP:
 372         case MLX5_CMD_OP_QUERY_VPORT_STATE:
 373         case MLX5_CMD_OP_QUERY_ADAPTER:
 374         case MLX5_CMD_OP_QUERY_ISSI:
 375         case MLX5_CMD_OP_QUERY_NIC_VPORT_CONTEXT:
 376         case MLX5_CMD_OP_QUERY_ROCE_ADDRESS:
 377         case MLX5_CMD_OP_QUERY_VNIC_ENV:
 378         case MLX5_CMD_OP_QUERY_VPORT_COUNTER:
 379         case MLX5_CMD_OP_GET_DROPPED_PACKET_LOG:
 380         case MLX5_CMD_OP_NOP:
 381         case MLX5_CMD_OP_QUERY_CONG_STATUS:
 382         case MLX5_CMD_OP_QUERY_CONG_PARAMS:
 383         case MLX5_CMD_OP_QUERY_CONG_STATISTICS:
 384                 return true;
 385         default:
 386                 return false;
 387         }
 388 }
 389
 390 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_QUERY_EQN)(struct ib_device *ib_dev,
 391                                   struct ib_uverbs_file *file,
 392                                   struct uverbs_attr_bundle *attrs)
 393 {
 394         struct mlx5_ib_dev *dev = to_mdev(ib_dev);
 395         int user_vector;
 396         int dev_eqn;
 397         unsigned int irqn;
 398         int err;
 399
 400         if (uverbs_copy_from(&user_vector, attrs,
 401                              MLX5_IB_ATTR_DEVX_QUERY_EQN_USER_VEC))
 402                 return -EFAULT;
 403
 404         err = mlx5_vector2eqn(dev->mdev, user_vector, &dev_eqn, &irqn);
 405         if (err < 0)
 406                 return err;
 407
 408         if (uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_QUERY_EQN_DEV_EQN,
 409                            &dev_eqn, sizeof(dev_eqn)))
 410                 return -EFAULT;
 411
 412         return 0;
 413 }
 414
 415 /*
 416  *Security note:
 417  * The hardware protection mechanism works like this: Each device object that
 418  * is subject to UAR doorbells (QP/SQ/CQ) gets a UAR ID (called uar_page in
 419  * the device specification manual) upon its creation. Then upon doorbell,
 420  * hardware fetches the object context for which the doorbell was rang, and
 421  * validates that the UAR through which the DB was rang matches the UAR ID
 422  * of the object.
 423  * If no match the doorbell is silently ignored by the hardware. Of course,
 424  * the user cannot ring a doorbell on a UAR that was not mapped to it.
 425  * Now in devx, as the devx kernel does not manipulate the QP/SQ/CQ command
 426  * mailboxes (except tagging them with UID), we expose to the user its UAR
 427  * ID, so it can embed it in these objects in the expected specification
 428  * format. So the only thing the user can do is hurt itself by creating a
 429  * QP/SQ/CQ with a UAR ID other than his, and then in this case other users
 430  * may ring a doorbell on its objects.
 431  * The consequence of that will be that another user can schedule a QP/SQ
 432  * of the buggy user for execution (just insert it to the hardware schedule
 433  * queue or arm its CQ for event generation), no further harm is expected.
 434  */
 435 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_QUERY_UAR)(struct ib_device *ib_dev,
 436                                   struct ib_uverbs_file *file,
 437                                   struct uverbs_attr_bundle *attrs)
 438 {
 439         struct mlx5_ib_ucontext *c = devx_ufile2uctx(file);
 440         u32 user_idx;
 441         s32 dev_idx;
 442
 443         if (uverbs_copy_from(&user_idx, attrs,
 444                              MLX5_IB_ATTR_DEVX_QUERY_UAR_USER_IDX))
 445                 return -EFAULT;
 446
 447         dev_idx = bfregn_to_uar_index(to_mdev(ib_dev),
 448                                       &c->bfregi, user_idx, true);
 449         if (dev_idx < 0)
 450                 return dev_idx;
 451
 452         if (uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_QUERY_UAR_DEV_IDX,
 453                            &dev_idx, sizeof(dev_idx)))
 454                 return -EFAULT;
 455
 456         return 0;
 457 }
 458
 459 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OTHER)(struct ib_device *ib_dev,
 460                                   struct ib_uverbs_file *file,
 461                                   struct uverbs_attr_bundle *attrs)
 462 {
 463         struct mlx5_ib_ucontext *c = devx_ufile2uctx(file);
 464         struct mlx5_ib_dev *dev = to_mdev(ib_dev);
 465         void *cmd_in = uverbs_attr_get_alloced_ptr(
 466                 attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_IN);
 467         int cmd_out_len = uverbs_attr_get_len(attrs,
 468                                         MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT);
 469         void *cmd_out;
 470         int err;
 471
 472         if (!c->devx_uid)
 473                 return -EPERM;
 474
 475         /* Only white list of some general HCA commands are allowed for this method. */
 476         if (!devx_is_general_cmd(cmd_in))
 477                 return -EINVAL;
 478
 479         cmd_out = kvzalloc(cmd_out_len, GFP_KERNEL);
 480         if (!cmd_out)
 481                 return -ENOMEM;
 482
 483         MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, c->devx_uid);
 484         err = mlx5_cmd_exec(dev->mdev, cmd_in,
 485                             uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_IN),
 486                             cmd_out, cmd_out_len);
 487         if (err)
 488                 goto other_cmd_free;
 489
 490         err = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT, cmd_out, cmd_out_len);
 491
 492 other_cmd_free:
 493         kvfree(cmd_out);
 494         return err;
 495 }
 496
 497 static void devx_obj_build_destroy_cmd(void *in, void *out, void *din,
 498                                        u32 *dinlen,
 499                                        u32 *obj_id)
 500 {
 501         u16 obj_type = MLX5_GET(general_obj_in_cmd_hdr, in, obj_type);
 502         u16 uid = MLX5_GET(general_obj_in_cmd_hdr, in, uid);
 503
 504         *obj_id = MLX5_GET(general_obj_out_cmd_hdr, out, obj_id);
 505         *dinlen = MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr);
 506
 507         MLX5_SET(general_obj_in_cmd_hdr, din, obj_id, *obj_id);
 508         MLX5_SET(general_obj_in_cmd_hdr, din, uid, uid);
 509
 510         switch (MLX5_GET(general_obj_in_cmd_hdr, in, opcode)) {
 511         case MLX5_CMD_OP_CREATE_GENERAL_OBJECT:
 512                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_GENERAL_OBJECT);
 513                 MLX5_SET(general_obj_in_cmd_hdr, din, obj_type, obj_type);
 514                 break;
 515
 516         case MLX5_CMD_OP_CREATE_MKEY:
 517                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_MKEY);
 518                 break;
 519         case MLX5_CMD_OP_CREATE_CQ:
 520                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_CQ);
 521                 break;
 522         case MLX5_CMD_OP_ALLOC_PD:
 523                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DEALLOC_PD);
 524                 break;
 525         case MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN:
 526                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
 527                          MLX5_CMD_OP_DEALLOC_TRANSPORT_DOMAIN);
 528                 break;
 529         case MLX5_CMD_OP_CREATE_RMP:
 530                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_RMP);
 531                 break;
 532         case MLX5_CMD_OP_CREATE_SQ:
 533                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_SQ);
 534                 break;
 535         case MLX5_CMD_OP_CREATE_RQ:
 536                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_RQ);
 537                 break;
 538         case MLX5_CMD_OP_CREATE_RQT:
 539                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_RQT);
 540                 break;
 541         case MLX5_CMD_OP_CREATE_TIR:
 542                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_TIR);
 543                 break;
 544         case MLX5_CMD_OP_CREATE_TIS:
 545                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_TIS);
 546                 break;
 547         case MLX5_CMD_OP_ALLOC_Q_COUNTER:
 548                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
 549                          MLX5_CMD_OP_DEALLOC_Q_COUNTER);
 550                 break;
 551         case MLX5_CMD_OP_CREATE_FLOW_TABLE:
 552                 *dinlen = MLX5_ST_SZ_BYTES(destroy_flow_table_in);
 553                 *obj_id = MLX5_GET(create_flow_table_out, out, table_id);
 554                 MLX5_SET(destroy_flow_table_in, din, other_vport,
 555                          MLX5_GET(create_flow_table_in,  in, other_vport));
 556                 MLX5_SET(destroy_flow_table_in, din, vport_number,
 557                          MLX5_GET(create_flow_table_in,  in, vport_number));
 558                 MLX5_SET(destroy_flow_table_in, din, table_type,
 559                          MLX5_GET(create_flow_table_in,  in, table_type));
 560                 MLX5_SET(destroy_flow_table_in, din, table_id, *obj_id);
 561                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
 562                          MLX5_CMD_OP_DESTROY_FLOW_TABLE);
 563                 break;
 564         case MLX5_CMD_OP_CREATE_FLOW_GROUP:
 565                 *dinlen = MLX5_ST_SZ_BYTES(destroy_flow_group_in);
 566                 *obj_id = MLX5_GET(create_flow_group_out, out, group_id);
 567                 MLX5_SET(destroy_flow_group_in, din, other_vport,
 568                          MLX5_GET(create_flow_group_in, in, other_vport));
 569                 MLX5_SET(destroy_flow_group_in, din, vport_number,
 570                          MLX5_GET(create_flow_group_in, in, vport_number));
 571                 MLX5_SET(destroy_flow_group_in, din, table_type,
 572                          MLX5_GET(create_flow_group_in, in, table_type));
 573                 MLX5_SET(destroy_flow_group_in, din, table_id,
 574                          MLX5_GET(create_flow_group_in, in, table_id));
 575                 MLX5_SET(destroy_flow_group_in, din, group_id, *obj_id);
 576                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
 577                          MLX5_CMD_OP_DESTROY_FLOW_GROUP);
 578                 break;
 579         case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
 580                 *dinlen = MLX5_ST_SZ_BYTES(delete_fte_in);
 581                 *obj_id = MLX5_GET(set_fte_in, in, flow_index);
 582                 MLX5_SET(delete_fte_in, din, other_vport,
 583                          MLX5_GET(set_fte_in,  in, other_vport));
 584                 MLX5_SET(delete_fte_in, din, vport_number,
 585                          MLX5_GET(set_fte_in, in, vport_number));
 586                 MLX5_SET(delete_fte_in, din, table_type,
 587                          MLX5_GET(set_fte_in, in, table_type));
 588                 MLX5_SET(delete_fte_in, din, table_id,
 589                          MLX5_GET(set_fte_in, in, table_id));
 590                 MLX5_SET(delete_fte_in, din, flow_index, *obj_id);
 591                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
 592                          MLX5_CMD_OP_DELETE_FLOW_TABLE_ENTRY);
 593                 break;
 594         case MLX5_CMD_OP_ALLOC_FLOW_COUNTER:
 595                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
 596                          MLX5_CMD_OP_DEALLOC_FLOW_COUNTER);
 597                 break;
 598         case MLX5_CMD_OP_ALLOC_ENCAP_HEADER:
 599                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
 600                          MLX5_CMD_OP_DEALLOC_ENCAP_HEADER);
 601                 break;
 602         case MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT:
 603                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
 604                          MLX5_CMD_OP_DEALLOC_MODIFY_HEADER_CONTEXT);
 605                 break;
 606         case MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT:
 607                 *dinlen = MLX5_ST_SZ_BYTES(destroy_scheduling_element_in);
 608                 *obj_id = MLX5_GET(create_scheduling_element_out, out,
 609                                    scheduling_element_id);
 610                 MLX5_SET(destroy_scheduling_element_in, din,
 611                          scheduling_hierarchy,
 612                          MLX5_GET(create_scheduling_element_in, in,
 613                                   scheduling_hierarchy));
 614                 MLX5_SET(destroy_scheduling_element_in, din,
 615                          scheduling_element_id, *obj_id);
 616                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
 617                          MLX5_CMD_OP_DESTROY_SCHEDULING_ELEMENT);
 618                 break;
 619         case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
 620                 *dinlen = MLX5_ST_SZ_BYTES(delete_vxlan_udp_dport_in);
 621                 *obj_id = MLX5_GET(add_vxlan_udp_dport_in, in, vxlan_udp_port);
 622                 MLX5_SET(delete_vxlan_udp_dport_in, din, vxlan_udp_port, *obj_id);
 623                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
 624                          MLX5_CMD_OP_DELETE_VXLAN_UDP_DPORT);
 625                 break;
 626         case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
 627                 *dinlen = MLX5_ST_SZ_BYTES(delete_l2_table_entry_in);
 628                 *obj_id = MLX5_GET(set_l2_table_entry_in, in, table_index);
 629                 MLX5_SET(delete_l2_table_entry_in, din, table_index, *obj_id);
 630                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
 631                          MLX5_CMD_OP_DELETE_L2_TABLE_ENTRY);
 632                 break;
 633         case MLX5_CMD_OP_CREATE_QP:
 634                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_QP);
 635                 break;
 636         case MLX5_CMD_OP_CREATE_SRQ:
 637                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_SRQ);
 638                 break;
 639         case MLX5_CMD_OP_CREATE_XRC_SRQ:
 640                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
 641                          MLX5_CMD_OP_DESTROY_XRC_SRQ);
 642                 break;
 643         case MLX5_CMD_OP_CREATE_DCT:
 644                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_DCT);
 645                 break;
 646         case MLX5_CMD_OP_CREATE_XRQ:
 647                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_XRQ);
 648                 break;
 649         case MLX5_CMD_OP_ATTACH_TO_MCG:
 650                 *dinlen = MLX5_ST_SZ_BYTES(detach_from_mcg_in);
 651                 MLX5_SET(detach_from_mcg_in, din, qpn,
 652                          MLX5_GET(attach_to_mcg_in, in, qpn));
 653                 memcpy(MLX5_ADDR_OF(detach_from_mcg_in, din, multicast_gid),
 654                        MLX5_ADDR_OF(attach_to_mcg_in, in, multicast_gid),
 655                        MLX5_FLD_SZ_BYTES(attach_to_mcg_in, multicast_gid));
 656                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DETACH_FROM_MCG);
 657                 break;
 658         case MLX5_CMD_OP_ALLOC_XRCD:
 659                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DEALLOC_XRCD);
 660                 break;
 661         default:
 662                 /* The entry must match to one of the devx_is_obj_create_cmd */
 663                 WARN_ON(true);
 664                 break;
 665         }
 666 }
 667
 668 static int devx_obj_cleanup(struct ib_uobject *uobject,
 669                             enum rdma_remove_reason why)
 670 {
 671         u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
 672         struct devx_obj *obj = uobject->object;
 673         int ret;
 674
 675         ret = mlx5_cmd_exec(obj->mdev, obj->dinbox, obj->dinlen, out, sizeof(out));
 676         if (ib_is_destroy_retryable(ret, why, uobject))
 677                 return ret;
 678
 679         kfree(obj);
 680         return ret;
 681 }
 682
 683 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_CREATE)(struct ib_device *ib_dev,
 684                                    struct ib_uverbs_file *file,
 685                                    struct uverbs_attr_bundle *attrs)
 686 {
 687         struct mlx5_ib_ucontext *c = devx_ufile2uctx(file);
 688         struct mlx5_ib_dev *dev = to_mdev(ib_dev);
 689         void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN);
 690         int cmd_out_len =  uverbs_attr_get_len(attrs,
 691                                         MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT);
 692         void *cmd_out;
 693         struct ib_uobject *uobj;
 694         struct devx_obj *obj;
 695         int err;
 696
 697         if (!c->devx_uid)
 698                 return -EPERM;
 699
 700         if (!devx_is_obj_create_cmd(cmd_in))
 701                 return -EINVAL;
 702
 703         obj = kzalloc(sizeof(struct devx_obj), GFP_KERNEL);
 704         if (!obj)
 705                 return -ENOMEM;
 706
 707         cmd_out = kvzalloc(cmd_out_len, GFP_KERNEL);
 708         if (!cmd_out) {
 709                 err = -ENOMEM;
 710                 goto obj_free;
 711         }
 712
 713         MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, c->devx_uid);
 714         err = mlx5_cmd_exec(dev->mdev, cmd_in,
 715                             uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN),
 716                             cmd_out, cmd_out_len);
 717         if (err)
 718                 goto cmd_free;
 719
 720         uobj = uverbs_attr_get_uobject(attrs, MLX5_IB_ATTR_DEVX_OBJ_CREATE_HANDLE);
 721         uobj->object = obj;
 722         obj->mdev = dev->mdev;
 723         devx_obj_build_destroy_cmd(cmd_in, cmd_out, obj->dinbox, &obj->dinlen, &obj->obj_id);
 724         WARN_ON(obj->dinlen > MLX5_MAX_DESTROY_INBOX_SIZE_DW * sizeof(u32));
 725
 726         err = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT, cmd_out, cmd_out_len);
 727         if (err)
 728                 goto cmd_free;
 729
 730         kvfree(cmd_out);
 731         return 0;
 732
 733 cmd_free:
 734         kvfree(cmd_out);
 735 obj_free:
 736         kfree(obj);
 737         return err;
 738 }
 739
 740 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_MODIFY)(struct ib_device *ib_dev,
 741                                    struct ib_uverbs_file *file,
 742                                    struct uverbs_attr_bundle *attrs)
 743 {
 744         struct mlx5_ib_ucontext *c = devx_ufile2uctx(file);
 745         struct mlx5_ib_dev *dev = to_mdev(ib_dev);
 746         void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN);
 747         int cmd_out_len = uverbs_attr_get_len(attrs,
 748                                         MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT);
 749         struct ib_uobject *uobj = uverbs_attr_get_uobject(attrs,
 750                                                           MLX5_IB_ATTR_DEVX_OBJ_MODIFY_HANDLE);
 751         void *cmd_out;
 752         int err;
 753
 754         if (!c->devx_uid)
 755                 return -EPERM;
 756
 757         if (!devx_is_obj_modify_cmd(cmd_in))
 758                 return -EINVAL;
 759
 760         if (!devx_is_valid_obj_id(uobj->object, cmd_in))
 761                 return -EINVAL;
 762
 763         cmd_out = kvzalloc(cmd_out_len, GFP_KERNEL);
 764         if (!cmd_out)
 765                 return -ENOMEM;
 766
 767         MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, c->devx_uid);
 768         err = mlx5_cmd_exec(dev->mdev, cmd_in,
 769                             uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN),
 770                             cmd_out, cmd_out_len);
 771         if (err)
 772                 goto other_cmd_free;
 773
 774         err = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT,
 775                              cmd_out, cmd_out_len);
 776
 777 other_cmd_free:
 778         kvfree(cmd_out);
 779         return err;
 780 }
 781
 782 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_QUERY)(struct ib_device *ib_dev,
 783                                    struct ib_uverbs_file *file,
 784                                    struct uverbs_attr_bundle *attrs)
 785 {
 786         struct mlx5_ib_ucontext *c = devx_ufile2uctx(file);
 787         struct mlx5_ib_dev *dev = to_mdev(ib_dev);
 788         void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN);
 789         int cmd_out_len = uverbs_attr_get_len(attrs,
 790                                               MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT);
 791         struct ib_uobject *uobj = uverbs_attr_get_uobject(attrs,
 792                                                           MLX5_IB_ATTR_DEVX_OBJ_QUERY_HANDLE);
 793         void *cmd_out;
 794         int err;
 795
 796         if (!c->devx_uid)
 797                 return -EPERM;
 798
 799         if (!devx_is_obj_query_cmd(cmd_in))
 800                 return -EINVAL;
 801
 802         if (!devx_is_valid_obj_id(uobj->object, cmd_in))
 803                 return -EINVAL;
 804
 805         cmd_out = kvzalloc(cmd_out_len, GFP_KERNEL);
 806         if (!cmd_out)
 807                 return -ENOMEM;
 808
 809         MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, c->devx_uid);
 810         err = mlx5_cmd_exec(dev->mdev, cmd_in,
 811                             uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN),
 812                             cmd_out, cmd_out_len);
 813         if (err)
 814                 goto other_cmd_free;
 815
 816         err = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT, cmd_out, cmd_out_len);
 817
 818 other_cmd_free:
 819         kvfree(cmd_out);
 820         return err;
 821 }
 822
 823 static int devx_umem_get(struct mlx5_ib_dev *dev, struct ib_ucontext *ucontext,
 824                          struct uverbs_attr_bundle *attrs,
 825                          struct devx_umem *obj)
 826 {
 827         u64 addr;
 828         size_t size;
 829         int access;
 830         int npages;
 831         int err;
 832         u32 page_mask;
 833
 834         if (uverbs_copy_from(&addr, attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_ADDR) ||
 835             uverbs_copy_from(&size, attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_LEN) ||
 836             uverbs_copy_from(&access, attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_ACCESS))
 837                 return -EFAULT;
 838
 839         err = ib_check_mr_access(access);
 840         if (err)
 841                 return err;
 842
 843         obj->umem = ib_umem_get(ucontext, addr, size, access, 0);
 844         if (IS_ERR(obj->umem))
 845                 return PTR_ERR(obj->umem);
 846
 847         mlx5_ib_cont_pages(obj->umem, obj->umem->address,
 848                            MLX5_MKEY_PAGE_SHIFT_MASK, &npages,
 849                            &obj->page_shift, &obj->ncont, NULL);
 850
 851         if (!npages) {
 852                 ib_umem_release(obj->umem);
 853                 return -EINVAL;
 854         }
 855
 856         page_mask = (1 << obj->page_shift) - 1;
 857         obj->page_offset = obj->umem->address & page_mask;
 858
 859         return 0;
 860 }
 861
 862 static int devx_umem_reg_cmd_alloc(struct devx_umem *obj,
 863                                    struct devx_umem_reg_cmd *cmd)
 864 {
 865         cmd->inlen = MLX5_ST_SZ_BYTES(create_umem_in) +
 866                     (MLX5_ST_SZ_BYTES(mtt) * obj->ncont);
 867         cmd->in = kvzalloc(cmd->inlen, GFP_KERNEL);
 868         return cmd->in ? 0 : -ENOMEM;
 869 }
 870
 871 static void devx_umem_reg_cmd_free(struct devx_umem_reg_cmd *cmd)
 872 {
 873         kvfree(cmd->in);
 874 }
 875
 876 static void devx_umem_reg_cmd_build(struct mlx5_ib_dev *dev,
 877                                     struct devx_umem *obj,
 878                                     struct devx_umem_reg_cmd *cmd)
 879 {
 880         void *umem;
 881         __be64 *mtt;
 882
 883         umem = MLX5_ADDR_OF(create_umem_in, cmd->in, umem);
 884         mtt = (__be64 *)MLX5_ADDR_OF(umem, umem, mtt);
 885
 886         MLX5_SET(general_obj_in_cmd_hdr, cmd->in, opcode, MLX5_CMD_OP_CREATE_GENERAL_OBJECT);
 887         MLX5_SET(general_obj_in_cmd_hdr, cmd->in, obj_type, MLX5_OBJ_TYPE_UMEM);
 888         MLX5_SET64(umem, umem, num_of_mtt, obj->ncont);
 889         MLX5_SET(umem, umem, log_page_size, obj->page_shift -
 890                                             MLX5_ADAPTER_PAGE_SHIFT);
 891         MLX5_SET(umem, umem, page_offset, obj->page_offset);
 892         mlx5_ib_populate_pas(dev, obj->umem, obj->page_shift, mtt,
 893                              (obj->umem->writable ? MLX5_IB_MTT_WRITE : 0) |
 894                              MLX5_IB_MTT_READ);
 895 }
 896
 897 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_UMEM_REG)(struct ib_device *ib_dev,
 898                                  struct ib_uverbs_file *file,
 899                                  struct uverbs_attr_bundle *attrs)
 900 {
 901         struct mlx5_ib_ucontext *c = devx_ufile2uctx(file);
 902         struct mlx5_ib_dev *dev = to_mdev(ib_dev);
 903         struct devx_umem_reg_cmd cmd;
 904         struct devx_umem *obj;
 905         struct ib_uobject *uobj;
 906         u32 obj_id;
 907         int err;
 908
 909         if (!c->devx_uid)
 910                 return -EPERM;
 911
 912         uobj = uverbs_attr_get_uobject(attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE);
 913         obj = kzalloc(sizeof(struct devx_umem), GFP_KERNEL);
 914         if (!obj)
 915                 return -ENOMEM;
 916
 917         err = devx_umem_get(dev, &c->ibucontext, attrs, obj);
 918         if (err)
 919                 goto err_obj_free;
 920
 921         err = devx_umem_reg_cmd_alloc(obj, &cmd);
 922         if (err)
 923                 goto err_umem_release;
 924
 925         devx_umem_reg_cmd_build(dev, obj, &cmd);
 926
 927         MLX5_SET(general_obj_in_cmd_hdr, cmd.in, uid, c->devx_uid);
 928         err = mlx5_cmd_exec(dev->mdev, cmd.in, cmd.inlen, cmd.out,
 929                             sizeof(cmd.out));
 930         if (err)
 931                 goto err_umem_reg_cmd_free;
 932
 933         obj->mdev = dev->mdev;
 934         uobj->object = obj;
 935         devx_obj_build_destroy_cmd(cmd.in, cmd.out, obj->dinbox, &obj->dinlen, &obj_id);
 936         err = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_OUT_ID, &obj_id, sizeof(obj_id));
 937         if (err)
 938                 goto err_umem_destroy;
 939
 940         devx_umem_reg_cmd_free(&cmd);
 941
 942         return 0;
 943
 944 err_umem_destroy:
 945         mlx5_cmd_exec(obj->mdev, obj->dinbox, obj->dinlen, cmd.out, sizeof(cmd.out));
 946 err_umem_reg_cmd_free:
 947         devx_umem_reg_cmd_free(&cmd);
 948 err_umem_release:
 949         ib_umem_release(obj->umem);
 950 err_obj_free:
 951         kfree(obj);
 952         return err;
 953 }
 954
 955 static int devx_umem_cleanup(struct ib_uobject *uobject,
 956                              enum rdma_remove_reason why)
 957 {
 958         struct devx_umem *obj = uobject->object;
 959         u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
 960         int err;
 961
 962         err = mlx5_cmd_exec(obj->mdev, obj->dinbox, obj->dinlen, out, sizeof(out));
 963         if (ib_is_destroy_retryable(err, why, uobject))
 964                 return err;
 965
 966         ib_umem_release(obj->umem);
 967         kfree(obj);
 968         return 0;
 969 }
 970
 971 DECLARE_UVERBS_NAMED_METHOD(
 972         MLX5_IB_METHOD_DEVX_UMEM_REG,
 973         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE,
 974                         MLX5_IB_OBJECT_DEVX_UMEM,
 975                         UVERBS_ACCESS_NEW,
 976                         UA_MANDATORY),
 977         UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_ADDR,
 978                            UVERBS_ATTR_TYPE(u64),
 979                            UA_MANDATORY),
 980         UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_LEN,
 981                            UVERBS_ATTR_TYPE(u64),
 982                            UA_MANDATORY),
 983         UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_ACCESS,
 984                            UVERBS_ATTR_TYPE(u32),
 985                            UA_MANDATORY),
 986         UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_DEVX_UMEM_REG_OUT_ID,
 987                             UVERBS_ATTR_TYPE(u32),
 988                             UA_MANDATORY));
 989
 990 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
 991         MLX5_IB_METHOD_DEVX_UMEM_DEREG,
 992         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_UMEM_DEREG_HANDLE,
 993                         MLX5_IB_OBJECT_DEVX_UMEM,
 994                         UVERBS_ACCESS_DESTROY,
 995                         UA_MANDATORY));
 996
 997 DECLARE_UVERBS_NAMED_METHOD(
 998         MLX5_IB_METHOD_DEVX_QUERY_EQN,
 999         UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_QUERY_EQN_USER_VEC,
1000                            UVERBS_ATTR_TYPE(u32),
1001                            UA_MANDATORY),
1002         UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_DEVX_QUERY_EQN_DEV_EQN,
1003                             UVERBS_ATTR_TYPE(u32),
1004                             UA_MANDATORY));
1005
1006 DECLARE_UVERBS_NAMED_METHOD(
1007         MLX5_IB_METHOD_DEVX_QUERY_UAR,
1008         UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_QUERY_UAR_USER_IDX,
1009                            UVERBS_ATTR_TYPE(u32),
1010                            UA_MANDATORY),
1011         UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_DEVX_QUERY_UAR_DEV_IDX,
1012                             UVERBS_ATTR_TYPE(u32),
1013                             UA_MANDATORY));
1014
1015 DECLARE_UVERBS_NAMED_METHOD(
1016         MLX5_IB_METHOD_DEVX_OTHER,
1017         UVERBS_ATTR_PTR_IN(
1018                 MLX5_IB_ATTR_DEVX_OTHER_CMD_IN,
1019                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
1020                 UA_MANDATORY,
1021                 UA_ALLOC_AND_COPY),
1022         UVERBS_ATTR_PTR_OUT(
1023                 MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT,
1024                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
1025                 UA_MANDATORY));
1026
1027 DECLARE_UVERBS_NAMED_METHOD(
1028         MLX5_IB_METHOD_DEVX_OBJ_CREATE,
1029         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_CREATE_HANDLE,
1030                         MLX5_IB_OBJECT_DEVX_OBJ,
1031                         UVERBS_ACCESS_NEW,
1032                         UA_MANDATORY),
1033         UVERBS_ATTR_PTR_IN(
1034                 MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN,
1035                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
1036                 UA_MANDATORY,
1037                 UA_ALLOC_AND_COPY),
1038         UVERBS_ATTR_PTR_OUT(
1039                 MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT,
1040                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
1041                 UA_MANDATORY));
1042
1043 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
1044         MLX5_IB_METHOD_DEVX_OBJ_DESTROY,
1045         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_DESTROY_HANDLE,
1046                         MLX5_IB_OBJECT_DEVX_OBJ,
1047                         UVERBS_ACCESS_DESTROY,
1048                         UA_MANDATORY));
1049
1050 DECLARE_UVERBS_NAMED_METHOD(
1051         MLX5_IB_METHOD_DEVX_OBJ_MODIFY,
1052         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_MODIFY_HANDLE,
1053                         MLX5_IB_OBJECT_DEVX_OBJ,
1054                         UVERBS_ACCESS_WRITE,
1055                         UA_MANDATORY),
1056         UVERBS_ATTR_PTR_IN(
1057                 MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN,
1058                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
1059                 UA_MANDATORY,
1060                 UA_ALLOC_AND_COPY),
1061         UVERBS_ATTR_PTR_OUT(
1062                 MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT,
1063                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
1064                 UA_MANDATORY));
1065
1066 DECLARE_UVERBS_NAMED_METHOD(
1067         MLX5_IB_METHOD_DEVX_OBJ_QUERY,
1068         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_QUERY_HANDLE,
1069                         MLX5_IB_OBJECT_DEVX_OBJ,
1070                         UVERBS_ACCESS_READ,
1071                         UA_MANDATORY),
1072         UVERBS_ATTR_PTR_IN(
1073                 MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN,
1074                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
1075                 UA_MANDATORY,
1076                 UA_ALLOC_AND_COPY),
1077         UVERBS_ATTR_PTR_OUT(
1078                 MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT,
1079                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
1080                 UA_MANDATORY));
1081
1082 DECLARE_UVERBS_GLOBAL_METHODS(MLX5_IB_OBJECT_DEVX,
1083                               &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OTHER),
1084                               &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_QUERY_UAR),
1085                               &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_QUERY_EQN));
1086
1087 DECLARE_UVERBS_NAMED_OBJECT(MLX5_IB_OBJECT_DEVX_OBJ,
1088                             UVERBS_TYPE_ALLOC_IDR(devx_obj_cleanup),
1089                             &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_CREATE),
1090                             &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_DESTROY),
1091                             &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_MODIFY),
1092                             &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_QUERY));
1093
1094 DECLARE_UVERBS_NAMED_OBJECT(MLX5_IB_OBJECT_DEVX_UMEM,
1095                             UVERBS_TYPE_ALLOC_IDR(devx_umem_cleanup),
1096                             &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_UMEM_REG),
1097                             &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_UMEM_DEREG));
1098
1099 DECLARE_UVERBS_OBJECT_TREE(devx_objects,
1100                            &UVERBS_OBJECT(MLX5_IB_OBJECT_DEVX),
1101                            &UVERBS_OBJECT(MLX5_IB_OBJECT_DEVX_OBJ),
1102                            &UVERBS_OBJECT(MLX5_IB_OBJECT_DEVX_UMEM));
1103
1104 const struct uverbs_object_tree_def *mlx5_ib_get_devx_tree(void)
1105 {
1106         return &devx_objects;
1107 }