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/mlx5_user_ioctl_verbs.h>
  12 #include <rdma/ib_umem.h>
  13 #include <rdma/uverbs_std_types.h>
  14 #include <linux/mlx5/driver.h>
  15 #include <linux/mlx5/fs.h>
  16 #include "mlx5_ib.h"
  17 #include "devx.h"
  18 #include "qp.h"
  19 #include <linux/xarray.h>
  20
  21 #define UVERBS_MODULE_NAME mlx5_ib
  22 #include <rdma/uverbs_named_ioctl.h>
  23
  24 static void dispatch_event_fd(struct list_head *fd_list, const void *data);
  25
  26 enum devx_obj_flags {
  27         DEVX_OBJ_FLAGS_INDIRECT_MKEY = 1 << 0,
  28         DEVX_OBJ_FLAGS_DCT = 1 << 1,
  29         DEVX_OBJ_FLAGS_CQ = 1 << 2,
  30 };
  31
  32 struct devx_async_data {
  33         struct mlx5_ib_dev *mdev;
  34         struct list_head list;
  35         struct devx_async_cmd_event_file *ev_file;
  36         struct mlx5_async_work cb_work;
  37         u16 cmd_out_len;
  38         /* must be last field in this structure */
  39         struct mlx5_ib_uapi_devx_async_cmd_hdr hdr;
  40 };
  41
  42 struct devx_async_event_data {
  43         struct list_head list; /* headed in ev_file->event_list */
  44         struct mlx5_ib_uapi_devx_async_event_hdr hdr;
  45 };
  46
  47 /* first level XA value data structure */
  48 struct devx_event {
  49         struct xarray object_ids; /* second XA level, Key = object id */
  50         struct list_head unaffiliated_list;
  51 };
  52
  53 /* second level XA value data structure */
  54 struct devx_obj_event {
  55         struct rcu_head rcu;
  56         struct list_head obj_sub_list;
  57 };
  58
  59 struct devx_event_subscription {
  60         struct list_head file_list; /* headed in ev_file->
  61                                      * subscribed_events_list
  62                                      */
  63         struct list_head xa_list; /* headed in devx_event->unaffiliated_list or
  64                                    * devx_obj_event->obj_sub_list
  65                                    */
  66         struct list_head obj_list; /* headed in devx_object */
  67         struct list_head event_list; /* headed in ev_file->event_list or in
  68                                       * temp list via subscription
  69                                       */
  70
  71         u8 is_cleaned:1;
  72         u32 xa_key_level1;
  73         u32 xa_key_level2;
  74         struct rcu_head rcu;
  75         u64 cookie;
  76         struct devx_async_event_file *ev_file;
  77         struct eventfd_ctx *eventfd;
  78 };
  79
  80 struct devx_async_event_file {
  81         struct ib_uobject uobj;
  82         /* Head of events that are subscribed to this FD */
  83         struct list_head subscribed_events_list;
  84         spinlock_t lock;
  85         wait_queue_head_t poll_wait;
  86         struct list_head event_list;
  87         struct mlx5_ib_dev *dev;
  88         u8 omit_data:1;
  89         u8 is_overflow_err:1;
  90         u8 is_destroyed:1;
  91 };
  92
  93 struct devx_umem {
  94         struct mlx5_core_dev            *mdev;
  95         struct ib_umem                  *umem;
  96         u32                             dinlen;
  97         u32                             dinbox[MLX5_ST_SZ_DW(destroy_umem_in)];
  98 };
  99
 100 struct devx_umem_reg_cmd {
 101         void                            *in;
 102         u32                             inlen;
 103         u32                             out[MLX5_ST_SZ_DW(create_umem_out)];
 104 };
 105
 106 static struct mlx5_ib_ucontext *
 107 devx_ufile2uctx(const struct uverbs_attr_bundle *attrs)
 108 {
 109         return to_mucontext(ib_uverbs_get_ucontext(attrs));
 110 }
 111
 112 int mlx5_ib_devx_create(struct mlx5_ib_dev *dev, bool is_user)
 113 {
 114         u32 in[MLX5_ST_SZ_DW(create_uctx_in)] = {};
 115         u32 out[MLX5_ST_SZ_DW(create_uctx_out)] = {};
 116         void *uctx;
 117         int err;
 118         u16 uid;
 119         u32 cap = 0;
 120
 121         /* 0 means not supported */
 122         if (!MLX5_CAP_GEN(dev->mdev, log_max_uctx))
 123                 return -EINVAL;
 124
 125         uctx = MLX5_ADDR_OF(create_uctx_in, in, uctx);
 126         if (is_user && capable(CAP_NET_RAW) &&
 127             (MLX5_CAP_GEN(dev->mdev, uctx_cap) & MLX5_UCTX_CAP_RAW_TX))
 128                 cap |= MLX5_UCTX_CAP_RAW_TX;
 129         if (is_user && capable(CAP_SYS_RAWIO) &&
 130             (MLX5_CAP_GEN(dev->mdev, uctx_cap) &
 131              MLX5_UCTX_CAP_INTERNAL_DEV_RES))
 132                 cap |= MLX5_UCTX_CAP_INTERNAL_DEV_RES;
 133
 134         MLX5_SET(create_uctx_in, in, opcode, MLX5_CMD_OP_CREATE_UCTX);
 135         MLX5_SET(uctx, uctx, cap, cap);
 136
 137         err = mlx5_cmd_exec(dev->mdev, in, sizeof(in), out, sizeof(out));
 138         if (err)
 139                 return err;
 140
 141         uid = MLX5_GET(create_uctx_out, out, uid);
 142         return uid;
 143 }
 144
 145 void mlx5_ib_devx_destroy(struct mlx5_ib_dev *dev, u16 uid)
 146 {
 147         u32 in[MLX5_ST_SZ_DW(destroy_uctx_in)] = {};
 148         u32 out[MLX5_ST_SZ_DW(destroy_uctx_out)] = {};
 149
 150         MLX5_SET(destroy_uctx_in, in, opcode, MLX5_CMD_OP_DESTROY_UCTX);
 151         MLX5_SET(destroy_uctx_in, in, uid, uid);
 152
 153         mlx5_cmd_exec(dev->mdev, in, sizeof(in), out, sizeof(out));
 154 }
 155
 156 static bool is_legacy_unaffiliated_event_num(u16 event_num)
 157 {
 158         switch (event_num) {
 159         case MLX5_EVENT_TYPE_PORT_CHANGE:
 160                 return true;
 161         default:
 162                 return false;
 163         }
 164 }
 165
 166 static bool is_legacy_obj_event_num(u16 event_num)
 167 {
 168         switch (event_num) {
 169         case MLX5_EVENT_TYPE_PATH_MIG:
 170         case MLX5_EVENT_TYPE_COMM_EST:
 171         case MLX5_EVENT_TYPE_SQ_DRAINED:
 172         case MLX5_EVENT_TYPE_SRQ_LAST_WQE:
 173         case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT:
 174         case MLX5_EVENT_TYPE_CQ_ERROR:
 175         case MLX5_EVENT_TYPE_WQ_CATAS_ERROR:
 176         case MLX5_EVENT_TYPE_PATH_MIG_FAILED:
 177         case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
 178         case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR:
 179         case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR:
 180         case MLX5_EVENT_TYPE_DCT_DRAINED:
 181         case MLX5_EVENT_TYPE_COMP:
 182         case MLX5_EVENT_TYPE_DCT_KEY_VIOLATION:
 183         case MLX5_EVENT_TYPE_XRQ_ERROR:
 184                 return true;
 185         default:
 186                 return false;
 187         }
 188 }
 189
 190 static u16 get_legacy_obj_type(u16 opcode)
 191 {
 192         switch (opcode) {
 193         case MLX5_CMD_OP_CREATE_RQ:
 194                 return MLX5_EVENT_QUEUE_TYPE_RQ;
 195         case MLX5_CMD_OP_CREATE_QP:
 196                 return MLX5_EVENT_QUEUE_TYPE_QP;
 197         case MLX5_CMD_OP_CREATE_SQ:
 198                 return MLX5_EVENT_QUEUE_TYPE_SQ;
 199         case MLX5_CMD_OP_CREATE_DCT:
 200                 return MLX5_EVENT_QUEUE_TYPE_DCT;
 201         default:
 202                 return 0;
 203         }
 204 }
 205
 206 static u16 get_dec_obj_type(struct devx_obj *obj, u16 event_num)
 207 {
 208         u16 opcode;
 209
 210         opcode = (obj->obj_id >> 32) & 0xffff;
 211
 212         if (is_legacy_obj_event_num(event_num))
 213                 return get_legacy_obj_type(opcode);
 214
 215         switch (opcode) {
 216         case MLX5_CMD_OP_CREATE_GENERAL_OBJECT:
 217                 return (obj->obj_id >> 48);
 218         case MLX5_CMD_OP_CREATE_RQ:
 219                 return MLX5_OBJ_TYPE_RQ;
 220         case MLX5_CMD_OP_CREATE_QP:
 221                 return MLX5_OBJ_TYPE_QP;
 222         case MLX5_CMD_OP_CREATE_SQ:
 223                 return MLX5_OBJ_TYPE_SQ;
 224         case MLX5_CMD_OP_CREATE_DCT:
 225                 return MLX5_OBJ_TYPE_DCT;
 226         case MLX5_CMD_OP_CREATE_TIR:
 227                 return MLX5_OBJ_TYPE_TIR;
 228         case MLX5_CMD_OP_CREATE_TIS:
 229                 return MLX5_OBJ_TYPE_TIS;
 230         case MLX5_CMD_OP_CREATE_PSV:
 231                 return MLX5_OBJ_TYPE_PSV;
 232         case MLX5_OBJ_TYPE_MKEY:
 233                 return MLX5_OBJ_TYPE_MKEY;
 234         case MLX5_CMD_OP_CREATE_RMP:
 235                 return MLX5_OBJ_TYPE_RMP;
 236         case MLX5_CMD_OP_CREATE_XRC_SRQ:
 237                 return MLX5_OBJ_TYPE_XRC_SRQ;
 238         case MLX5_CMD_OP_CREATE_XRQ:
 239                 return MLX5_OBJ_TYPE_XRQ;
 240         case MLX5_CMD_OP_CREATE_RQT:
 241                 return MLX5_OBJ_TYPE_RQT;
 242         case MLX5_CMD_OP_ALLOC_FLOW_COUNTER:
 243                 return MLX5_OBJ_TYPE_FLOW_COUNTER;
 244         case MLX5_CMD_OP_CREATE_CQ:
 245                 return MLX5_OBJ_TYPE_CQ;
 246         default:
 247                 return 0;
 248         }
 249 }
 250
 251 static u16 get_event_obj_type(unsigned long event_type, struct mlx5_eqe *eqe)
 252 {
 253         switch (event_type) {
 254         case MLX5_EVENT_TYPE_WQ_CATAS_ERROR:
 255         case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR:
 256         case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
 257         case MLX5_EVENT_TYPE_SRQ_LAST_WQE:
 258         case MLX5_EVENT_TYPE_PATH_MIG:
 259         case MLX5_EVENT_TYPE_PATH_MIG_FAILED:
 260         case MLX5_EVENT_TYPE_COMM_EST:
 261         case MLX5_EVENT_TYPE_SQ_DRAINED:
 262         case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT:
 263         case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR:
 264                 return eqe->data.qp_srq.type;
 265         case MLX5_EVENT_TYPE_CQ_ERROR:
 266         case MLX5_EVENT_TYPE_XRQ_ERROR:
 267                 return 0;
 268         case MLX5_EVENT_TYPE_DCT_DRAINED:
 269         case MLX5_EVENT_TYPE_DCT_KEY_VIOLATION:
 270                 return MLX5_EVENT_QUEUE_TYPE_DCT;
 271         default:
 272                 return MLX5_GET(affiliated_event_header, &eqe->data, obj_type);
 273         }
 274 }
 275
 276 static u32 get_dec_obj_id(u64 obj_id)
 277 {
 278         return (obj_id & 0xffffffff);
 279 }
 280
 281 /*
 282  * As the obj_id in the firmware is not globally unique the object type
 283  * must be considered upon checking for a valid object id.
 284  * For that the opcode of the creator command is encoded as part of the obj_id.
 285  */
 286 static u64 get_enc_obj_id(u32 opcode, u32 obj_id)
 287 {
 288         return ((u64)opcode << 32) | obj_id;
 289 }
 290
 291 static u32 devx_get_created_obj_id(const void *in, const void *out, u16 opcode)
 292 {
 293         switch (opcode) {
 294         case MLX5_CMD_OP_CREATE_GENERAL_OBJECT:
 295                 return MLX5_GET(general_obj_out_cmd_hdr, out, obj_id);
 296         case MLX5_CMD_OP_CREATE_UMEM:
 297                 return MLX5_GET(create_umem_out, out, umem_id);
 298         case MLX5_CMD_OP_CREATE_MKEY:
 299                 return MLX5_GET(create_mkey_out, out, mkey_index);
 300         case MLX5_CMD_OP_CREATE_CQ:
 301                 return MLX5_GET(create_cq_out, out, cqn);
 302         case MLX5_CMD_OP_ALLOC_PD:
 303                 return MLX5_GET(alloc_pd_out, out, pd);
 304         case MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN:
 305                 return MLX5_GET(alloc_transport_domain_out, out,
 306                                 transport_domain);
 307         case MLX5_CMD_OP_CREATE_RMP:
 308                 return MLX5_GET(create_rmp_out, out, rmpn);
 309         case MLX5_CMD_OP_CREATE_SQ:
 310                 return MLX5_GET(create_sq_out, out, sqn);
 311         case MLX5_CMD_OP_CREATE_RQ:
 312                 return MLX5_GET(create_rq_out, out, rqn);
 313         case MLX5_CMD_OP_CREATE_RQT:
 314                 return MLX5_GET(create_rqt_out, out, rqtn);
 315         case MLX5_CMD_OP_CREATE_TIR:
 316                 return MLX5_GET(create_tir_out, out, tirn);
 317         case MLX5_CMD_OP_CREATE_TIS:
 318                 return MLX5_GET(create_tis_out, out, tisn);
 319         case MLX5_CMD_OP_ALLOC_Q_COUNTER:
 320                 return MLX5_GET(alloc_q_counter_out, out, counter_set_id);
 321         case MLX5_CMD_OP_CREATE_FLOW_TABLE:
 322                 return MLX5_GET(create_flow_table_out, out, table_id);
 323         case MLX5_CMD_OP_CREATE_FLOW_GROUP:
 324                 return MLX5_GET(create_flow_group_out, out, group_id);
 325         case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
 326                 return MLX5_GET(set_fte_in, in, flow_index);
 327         case MLX5_CMD_OP_ALLOC_FLOW_COUNTER:
 328                 return MLX5_GET(alloc_flow_counter_out, out, flow_counter_id);
 329         case MLX5_CMD_OP_ALLOC_PACKET_REFORMAT_CONTEXT:
 330                 return MLX5_GET(alloc_packet_reformat_context_out, out,
 331                                 packet_reformat_id);
 332         case MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT:
 333                 return MLX5_GET(alloc_modify_header_context_out, out,
 334                                 modify_header_id);
 335         case MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT:
 336                 return MLX5_GET(create_scheduling_element_out, out,
 337                                 scheduling_element_id);
 338         case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
 339                 return MLX5_GET(add_vxlan_udp_dport_in, in, vxlan_udp_port);
 340         case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
 341                 return MLX5_GET(set_l2_table_entry_in, in, table_index);
 342         case MLX5_CMD_OP_CREATE_QP:
 343                 return MLX5_GET(create_qp_out, out, qpn);
 344         case MLX5_CMD_OP_CREATE_SRQ:
 345                 return MLX5_GET(create_srq_out, out, srqn);
 346         case MLX5_CMD_OP_CREATE_XRC_SRQ:
 347                 return MLX5_GET(create_xrc_srq_out, out, xrc_srqn);
 348         case MLX5_CMD_OP_CREATE_DCT:
 349                 return MLX5_GET(create_dct_out, out, dctn);
 350         case MLX5_CMD_OP_CREATE_XRQ:
 351                 return MLX5_GET(create_xrq_out, out, xrqn);
 352         case MLX5_CMD_OP_ATTACH_TO_MCG:
 353                 return MLX5_GET(attach_to_mcg_in, in, qpn);
 354         case MLX5_CMD_OP_ALLOC_XRCD:
 355                 return MLX5_GET(alloc_xrcd_out, out, xrcd);
 356         case MLX5_CMD_OP_CREATE_PSV:
 357                 return MLX5_GET(create_psv_out, out, psv0_index);
 358         default:
 359                 /* The entry must match to one of the devx_is_obj_create_cmd */
 360                 WARN_ON(true);
 361                 return 0;
 362         }
 363 }
 364
 365 static u64 devx_get_obj_id(const void *in)
 366 {
 367         u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
 368         u64 obj_id;
 369
 370         switch (opcode) {
 371         case MLX5_CMD_OP_MODIFY_GENERAL_OBJECT:
 372         case MLX5_CMD_OP_QUERY_GENERAL_OBJECT:
 373                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_GENERAL_OBJECT |
 374                                         MLX5_GET(general_obj_in_cmd_hdr, in,
 375                                                  obj_type) << 16,
 376                                         MLX5_GET(general_obj_in_cmd_hdr, in,
 377                                                  obj_id));
 378                 break;
 379         case MLX5_CMD_OP_QUERY_MKEY:
 380                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_MKEY,
 381                                         MLX5_GET(query_mkey_in, in,
 382                                                  mkey_index));
 383                 break;
 384         case MLX5_CMD_OP_QUERY_CQ:
 385                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_CQ,
 386                                         MLX5_GET(query_cq_in, in, cqn));
 387                 break;
 388         case MLX5_CMD_OP_MODIFY_CQ:
 389                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_CQ,
 390                                         MLX5_GET(modify_cq_in, in, cqn));
 391                 break;
 392         case MLX5_CMD_OP_QUERY_SQ:
 393                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SQ,
 394                                         MLX5_GET(query_sq_in, in, sqn));
 395                 break;
 396         case MLX5_CMD_OP_MODIFY_SQ:
 397                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SQ,
 398                                         MLX5_GET(modify_sq_in, in, sqn));
 399                 break;
 400         case MLX5_CMD_OP_QUERY_RQ:
 401                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ,
 402                                         MLX5_GET(query_rq_in, in, rqn));
 403                 break;
 404         case MLX5_CMD_OP_MODIFY_RQ:
 405                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ,
 406                                         MLX5_GET(modify_rq_in, in, rqn));
 407                 break;
 408         case MLX5_CMD_OP_QUERY_RMP:
 409                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RMP,
 410                                         MLX5_GET(query_rmp_in, in, rmpn));
 411                 break;
 412         case MLX5_CMD_OP_MODIFY_RMP:
 413                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RMP,
 414                                         MLX5_GET(modify_rmp_in, in, rmpn));
 415                 break;
 416         case MLX5_CMD_OP_QUERY_RQT:
 417                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQT,
 418                                         MLX5_GET(query_rqt_in, in, rqtn));
 419                 break;
 420         case MLX5_CMD_OP_MODIFY_RQT:
 421                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQT,
 422                                         MLX5_GET(modify_rqt_in, in, rqtn));
 423                 break;
 424         case MLX5_CMD_OP_QUERY_TIR:
 425                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_TIR,
 426                                         MLX5_GET(query_tir_in, in, tirn));
 427                 break;
 428         case MLX5_CMD_OP_MODIFY_TIR:
 429                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_TIR,
 430                                         MLX5_GET(modify_tir_in, in, tirn));
 431                 break;
 432         case MLX5_CMD_OP_QUERY_TIS:
 433                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_TIS,
 434                                         MLX5_GET(query_tis_in, in, tisn));
 435                 break;
 436         case MLX5_CMD_OP_MODIFY_TIS:
 437                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_TIS,
 438                                         MLX5_GET(modify_tis_in, in, tisn));
 439                 break;
 440         case MLX5_CMD_OP_QUERY_FLOW_TABLE:
 441                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_FLOW_TABLE,
 442                                         MLX5_GET(query_flow_table_in, in,
 443                                                  table_id));
 444                 break;
 445         case MLX5_CMD_OP_MODIFY_FLOW_TABLE:
 446                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_FLOW_TABLE,
 447                                         MLX5_GET(modify_flow_table_in, in,
 448                                                  table_id));
 449                 break;
 450         case MLX5_CMD_OP_QUERY_FLOW_GROUP:
 451                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_FLOW_GROUP,
 452                                         MLX5_GET(query_flow_group_in, in,
 453                                                  group_id));
 454                 break;
 455         case MLX5_CMD_OP_QUERY_FLOW_TABLE_ENTRY:
 456                 obj_id = get_enc_obj_id(MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY,
 457                                         MLX5_GET(query_fte_in, in,
 458                                                  flow_index));
 459                 break;
 460         case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
 461                 obj_id = get_enc_obj_id(MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY,
 462                                         MLX5_GET(set_fte_in, in, flow_index));
 463                 break;
 464         case MLX5_CMD_OP_QUERY_Q_COUNTER:
 465                 obj_id = get_enc_obj_id(MLX5_CMD_OP_ALLOC_Q_COUNTER,
 466                                         MLX5_GET(query_q_counter_in, in,
 467                                                  counter_set_id));
 468                 break;
 469         case MLX5_CMD_OP_QUERY_FLOW_COUNTER:
 470                 obj_id = get_enc_obj_id(MLX5_CMD_OP_ALLOC_FLOW_COUNTER,
 471                                         MLX5_GET(query_flow_counter_in, in,
 472                                                  flow_counter_id));
 473                 break;
 474         case MLX5_CMD_OP_QUERY_MODIFY_HEADER_CONTEXT:
 475                 obj_id = get_enc_obj_id(MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT,
 476                                         MLX5_GET(query_modify_header_context_in,
 477                                                  in, modify_header_id));
 478                 break;
 479         case MLX5_CMD_OP_QUERY_SCHEDULING_ELEMENT:
 480                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT,
 481                                         MLX5_GET(query_scheduling_element_in,
 482                                                  in, scheduling_element_id));
 483                 break;
 484         case MLX5_CMD_OP_MODIFY_SCHEDULING_ELEMENT:
 485                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT,
 486                                         MLX5_GET(modify_scheduling_element_in,
 487                                                  in, scheduling_element_id));
 488                 break;
 489         case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
 490                 obj_id = get_enc_obj_id(MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT,
 491                                         MLX5_GET(add_vxlan_udp_dport_in, in,
 492                                                  vxlan_udp_port));
 493                 break;
 494         case MLX5_CMD_OP_QUERY_L2_TABLE_ENTRY:
 495                 obj_id = get_enc_obj_id(MLX5_CMD_OP_SET_L2_TABLE_ENTRY,
 496                                         MLX5_GET(query_l2_table_entry_in, in,
 497                                                  table_index));
 498                 break;
 499         case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
 500                 obj_id = get_enc_obj_id(MLX5_CMD_OP_SET_L2_TABLE_ENTRY,
 501                                         MLX5_GET(set_l2_table_entry_in, in,
 502                                                  table_index));
 503                 break;
 504         case MLX5_CMD_OP_QUERY_QP:
 505                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
 506                                         MLX5_GET(query_qp_in, in, qpn));
 507                 break;
 508         case MLX5_CMD_OP_RST2INIT_QP:
 509                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
 510                                         MLX5_GET(rst2init_qp_in, in, qpn));
 511                 break;
 512         case MLX5_CMD_OP_INIT2INIT_QP:
 513                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
 514                                         MLX5_GET(init2init_qp_in, in, qpn));
 515                 break;
 516         case MLX5_CMD_OP_INIT2RTR_QP:
 517                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
 518                                         MLX5_GET(init2rtr_qp_in, in, qpn));
 519                 break;
 520         case MLX5_CMD_OP_RTR2RTS_QP:
 521                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
 522                                         MLX5_GET(rtr2rts_qp_in, in, qpn));
 523                 break;
 524         case MLX5_CMD_OP_RTS2RTS_QP:
 525                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
 526                                         MLX5_GET(rts2rts_qp_in, in, qpn));
 527                 break;
 528         case MLX5_CMD_OP_SQERR2RTS_QP:
 529                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
 530                                         MLX5_GET(sqerr2rts_qp_in, in, qpn));
 531                 break;
 532         case MLX5_CMD_OP_2ERR_QP:
 533                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
 534                                         MLX5_GET(qp_2err_in, in, qpn));
 535                 break;
 536         case MLX5_CMD_OP_2RST_QP:
 537                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
 538                                         MLX5_GET(qp_2rst_in, in, qpn));
 539                 break;
 540         case MLX5_CMD_OP_QUERY_DCT:
 541                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_DCT,
 542                                         MLX5_GET(query_dct_in, in, dctn));
 543                 break;
 544         case MLX5_CMD_OP_QUERY_XRQ:
 545         case MLX5_CMD_OP_QUERY_XRQ_DC_PARAMS_ENTRY:
 546         case MLX5_CMD_OP_QUERY_XRQ_ERROR_PARAMS:
 547                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_XRQ,
 548                                         MLX5_GET(query_xrq_in, in, xrqn));
 549                 break;
 550         case MLX5_CMD_OP_QUERY_XRC_SRQ:
 551                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_XRC_SRQ,
 552                                         MLX5_GET(query_xrc_srq_in, in,
 553                                                  xrc_srqn));
 554                 break;
 555         case MLX5_CMD_OP_ARM_XRC_SRQ:
 556                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_XRC_SRQ,
 557                                         MLX5_GET(arm_xrc_srq_in, in, xrc_srqn));
 558                 break;
 559         case MLX5_CMD_OP_QUERY_SRQ:
 560                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SRQ,
 561                                         MLX5_GET(query_srq_in, in, srqn));
 562                 break;
 563         case MLX5_CMD_OP_ARM_RQ:
 564                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ,
 565                                         MLX5_GET(arm_rq_in, in, srq_number));
 566                 break;
 567         case MLX5_CMD_OP_ARM_DCT_FOR_KEY_VIOLATION:
 568                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_DCT,
 569                                         MLX5_GET(drain_dct_in, in, dctn));
 570                 break;
 571         case MLX5_CMD_OP_ARM_XRQ:
 572         case MLX5_CMD_OP_SET_XRQ_DC_PARAMS_ENTRY:
 573         case MLX5_CMD_OP_RELEASE_XRQ_ERROR:
 574         case MLX5_CMD_OP_MODIFY_XRQ:
 575                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_XRQ,
 576                                         MLX5_GET(arm_xrq_in, in, xrqn));
 577                 break;
 578         case MLX5_CMD_OP_QUERY_PACKET_REFORMAT_CONTEXT:
 579                 obj_id = get_enc_obj_id
 580                                 (MLX5_CMD_OP_ALLOC_PACKET_REFORMAT_CONTEXT,
 581                                  MLX5_GET(query_packet_reformat_context_in,
 582                                           in, packet_reformat_id));
 583                 break;
 584         default:
 585                 obj_id = 0;
 586         }
 587
 588         return obj_id;
 589 }
 590
 591 static bool devx_is_valid_obj_id(struct uverbs_attr_bundle *attrs,
 592                                  struct ib_uobject *uobj, const void *in)
 593 {
 594         struct mlx5_ib_dev *dev = mlx5_udata_to_mdev(&attrs->driver_udata);
 595         u64 obj_id = devx_get_obj_id(in);
 596
 597         if (!obj_id)
 598                 return false;
 599
 600         switch (uobj_get_object_id(uobj)) {
 601         case UVERBS_OBJECT_CQ:
 602                 return get_enc_obj_id(MLX5_CMD_OP_CREATE_CQ,
 603                                       to_mcq(uobj->object)->mcq.cqn) ==
 604                                       obj_id;
 605
 606         case UVERBS_OBJECT_SRQ:
 607         {
 608                 struct mlx5_core_srq *srq = &(to_msrq(uobj->object)->msrq);
 609                 u16 opcode;
 610
 611                 switch (srq->common.res) {
 612                 case MLX5_RES_XSRQ:
 613                         opcode = MLX5_CMD_OP_CREATE_XRC_SRQ;
 614                         break;
 615                 case MLX5_RES_XRQ:
 616                         opcode = MLX5_CMD_OP_CREATE_XRQ;
 617                         break;
 618                 default:
 619                         if (!dev->mdev->issi)
 620                                 opcode = MLX5_CMD_OP_CREATE_SRQ;
 621                         else
 622                                 opcode = MLX5_CMD_OP_CREATE_RMP;
 623                 }
 624
 625                 return get_enc_obj_id(opcode,
 626                                       to_msrq(uobj->object)->msrq.srqn) ==
 627                                       obj_id;
 628         }
 629
 630         case UVERBS_OBJECT_QP:
 631         {
 632                 struct mlx5_ib_qp *qp = to_mqp(uobj->object);
 633
 634                 if (qp->type == IB_QPT_RAW_PACKET ||
 635                     (qp->flags & IB_QP_CREATE_SOURCE_QPN)) {
 636                         struct mlx5_ib_raw_packet_qp *raw_packet_qp =
 637                                                          &qp->raw_packet_qp;
 638                         struct mlx5_ib_rq *rq = &raw_packet_qp->rq;
 639                         struct mlx5_ib_sq *sq = &raw_packet_qp->sq;
 640
 641                         return (get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ,
 642                                                rq->base.mqp.qpn) == obj_id ||
 643                                 get_enc_obj_id(MLX5_CMD_OP_CREATE_SQ,
 644                                                sq->base.mqp.qpn) == obj_id ||
 645                                 get_enc_obj_id(MLX5_CMD_OP_CREATE_TIR,
 646                                                rq->tirn) == obj_id ||
 647                                 get_enc_obj_id(MLX5_CMD_OP_CREATE_TIS,
 648                                                sq->tisn) == obj_id);
 649                 }
 650
 651                 if (qp->type == MLX5_IB_QPT_DCT)
 652                         return get_enc_obj_id(MLX5_CMD_OP_CREATE_DCT,
 653                                               qp->dct.mdct.mqp.qpn) == obj_id;
 654                 return get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
 655                                       qp->ibqp.qp_num) == obj_id;
 656         }
 657
 658         case UVERBS_OBJECT_WQ:
 659                 return get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ,
 660                                       to_mrwq(uobj->object)->core_qp.qpn) ==
 661                                       obj_id;
 662
 663         case UVERBS_OBJECT_RWQ_IND_TBL:
 664                 return get_enc_obj_id(MLX5_CMD_OP_CREATE_RQT,
 665                                       to_mrwq_ind_table(uobj->object)->rqtn) ==
 666                                       obj_id;
 667
 668         case MLX5_IB_OBJECT_DEVX_OBJ:
 669         {
 670                 u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
 671                 struct devx_obj *devx_uobj = uobj->object;
 672
 673                 if (opcode == MLX5_CMD_OP_QUERY_FLOW_COUNTER &&
 674                     devx_uobj->flow_counter_bulk_size) {
 675                         u64 end;
 676
 677                         end = devx_uobj->obj_id +
 678                                 devx_uobj->flow_counter_bulk_size;
 679                         return devx_uobj->obj_id <= obj_id && end > obj_id;
 680                 }
 681
 682                 return devx_uobj->obj_id == obj_id;
 683         }
 684
 685         default:
 686                 return false;
 687         }
 688 }
 689
 690 static void devx_set_umem_valid(const void *in)
 691 {
 692         u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
 693
 694         switch (opcode) {
 695         case MLX5_CMD_OP_CREATE_MKEY:
 696                 MLX5_SET(create_mkey_in, in, mkey_umem_valid, 1);
 697                 break;
 698         case MLX5_CMD_OP_CREATE_CQ:
 699         {
 700                 void *cqc;
 701
 702                 MLX5_SET(create_cq_in, in, cq_umem_valid, 1);
 703                 cqc = MLX5_ADDR_OF(create_cq_in, in, cq_context);
 704                 MLX5_SET(cqc, cqc, dbr_umem_valid, 1);
 705                 break;
 706         }
 707         case MLX5_CMD_OP_CREATE_QP:
 708         {
 709                 void *qpc;
 710
 711                 qpc = MLX5_ADDR_OF(create_qp_in, in, qpc);
 712                 MLX5_SET(qpc, qpc, dbr_umem_valid, 1);
 713                 MLX5_SET(create_qp_in, in, wq_umem_valid, 1);
 714                 break;
 715         }
 716
 717         case MLX5_CMD_OP_CREATE_RQ:
 718         {
 719                 void *rqc, *wq;
 720
 721                 rqc = MLX5_ADDR_OF(create_rq_in, in, ctx);
 722                 wq  = MLX5_ADDR_OF(rqc, rqc, wq);
 723                 MLX5_SET(wq, wq, dbr_umem_valid, 1);
 724                 MLX5_SET(wq, wq, wq_umem_valid, 1);
 725                 break;
 726         }
 727
 728         case MLX5_CMD_OP_CREATE_SQ:
 729         {
 730                 void *sqc, *wq;
 731
 732                 sqc = MLX5_ADDR_OF(create_sq_in, in, ctx);
 733                 wq = MLX5_ADDR_OF(sqc, sqc, wq);
 734                 MLX5_SET(wq, wq, dbr_umem_valid, 1);
 735                 MLX5_SET(wq, wq, wq_umem_valid, 1);
 736                 break;
 737         }
 738
 739         case MLX5_CMD_OP_MODIFY_CQ:
 740                 MLX5_SET(modify_cq_in, in, cq_umem_valid, 1);
 741                 break;
 742
 743         case MLX5_CMD_OP_CREATE_RMP:
 744         {
 745                 void *rmpc, *wq;
 746
 747                 rmpc = MLX5_ADDR_OF(create_rmp_in, in, ctx);
 748                 wq = MLX5_ADDR_OF(rmpc, rmpc, wq);
 749                 MLX5_SET(wq, wq, dbr_umem_valid, 1);
 750                 MLX5_SET(wq, wq, wq_umem_valid, 1);
 751                 break;
 752         }
 753
 754         case MLX5_CMD_OP_CREATE_XRQ:
 755         {
 756                 void *xrqc, *wq;
 757
 758                 xrqc = MLX5_ADDR_OF(create_xrq_in, in, xrq_context);
 759                 wq = MLX5_ADDR_OF(xrqc, xrqc, wq);
 760                 MLX5_SET(wq, wq, dbr_umem_valid, 1);
 761                 MLX5_SET(wq, wq, wq_umem_valid, 1);
 762                 break;
 763         }
 764
 765         case MLX5_CMD_OP_CREATE_XRC_SRQ:
 766         {
 767                 void *xrc_srqc;
 768
 769                 MLX5_SET(create_xrc_srq_in, in, xrc_srq_umem_valid, 1);
 770                 xrc_srqc = MLX5_ADDR_OF(create_xrc_srq_in, in,
 771                                         xrc_srq_context_entry);
 772                 MLX5_SET(xrc_srqc, xrc_srqc, dbr_umem_valid, 1);
 773                 break;
 774         }
 775
 776         default:
 777                 return;
 778         }
 779 }
 780
 781 static bool devx_is_obj_create_cmd(const void *in, u16 *opcode)
 782 {
 783         *opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
 784
 785         switch (*opcode) {
 786         case MLX5_CMD_OP_CREATE_GENERAL_OBJECT:
 787         case MLX5_CMD_OP_CREATE_MKEY:
 788         case MLX5_CMD_OP_CREATE_CQ:
 789         case MLX5_CMD_OP_ALLOC_PD:
 790         case MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN:
 791         case MLX5_CMD_OP_CREATE_RMP:
 792         case MLX5_CMD_OP_CREATE_SQ:
 793         case MLX5_CMD_OP_CREATE_RQ:
 794         case MLX5_CMD_OP_CREATE_RQT:
 795         case MLX5_CMD_OP_CREATE_TIR:
 796         case MLX5_CMD_OP_CREATE_TIS:
 797         case MLX5_CMD_OP_ALLOC_Q_COUNTER:
 798         case MLX5_CMD_OP_CREATE_FLOW_TABLE:
 799         case MLX5_CMD_OP_CREATE_FLOW_GROUP:
 800         case MLX5_CMD_OP_ALLOC_FLOW_COUNTER:
 801         case MLX5_CMD_OP_ALLOC_PACKET_REFORMAT_CONTEXT:
 802         case MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT:
 803         case MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT:
 804         case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
 805         case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
 806         case MLX5_CMD_OP_CREATE_QP:
 807         case MLX5_CMD_OP_CREATE_SRQ:
 808         case MLX5_CMD_OP_CREATE_XRC_SRQ:
 809         case MLX5_CMD_OP_CREATE_DCT:
 810         case MLX5_CMD_OP_CREATE_XRQ:
 811         case MLX5_CMD_OP_ATTACH_TO_MCG:
 812         case MLX5_CMD_OP_ALLOC_XRCD:
 813                 return true;
 814         case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
 815         {
 816                 u16 op_mod = MLX5_GET(set_fte_in, in, op_mod);
 817                 if (op_mod == 0)
 818                         return true;
 819                 return false;
 820         }
 821         case MLX5_CMD_OP_CREATE_PSV:
 822         {
 823                 u8 num_psv = MLX5_GET(create_psv_in, in, num_psv);
 824
 825                 if (num_psv == 1)
 826                         return true;
 827                 return false;
 828         }
 829         default:
 830                 return false;
 831         }
 832 }
 833
 834 static bool devx_is_obj_modify_cmd(const void *in)
 835 {
 836         u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
 837
 838         switch (opcode) {
 839         case MLX5_CMD_OP_MODIFY_GENERAL_OBJECT:
 840         case MLX5_CMD_OP_MODIFY_CQ:
 841         case MLX5_CMD_OP_MODIFY_RMP:
 842         case MLX5_CMD_OP_MODIFY_SQ:
 843         case MLX5_CMD_OP_MODIFY_RQ:
 844         case MLX5_CMD_OP_MODIFY_RQT:
 845         case MLX5_CMD_OP_MODIFY_TIR:
 846         case MLX5_CMD_OP_MODIFY_TIS:
 847         case MLX5_CMD_OP_MODIFY_FLOW_TABLE:
 848         case MLX5_CMD_OP_MODIFY_SCHEDULING_ELEMENT:
 849         case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
 850         case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
 851         case MLX5_CMD_OP_RST2INIT_QP:
 852         case MLX5_CMD_OP_INIT2RTR_QP:
 853         case MLX5_CMD_OP_INIT2INIT_QP:
 854         case MLX5_CMD_OP_RTR2RTS_QP:
 855         case MLX5_CMD_OP_RTS2RTS_QP:
 856         case MLX5_CMD_OP_SQERR2RTS_QP:
 857         case MLX5_CMD_OP_2ERR_QP:
 858         case MLX5_CMD_OP_2RST_QP:
 859         case MLX5_CMD_OP_ARM_XRC_SRQ:
 860         case MLX5_CMD_OP_ARM_RQ:
 861         case MLX5_CMD_OP_ARM_DCT_FOR_KEY_VIOLATION:
 862         case MLX5_CMD_OP_ARM_XRQ:
 863         case MLX5_CMD_OP_SET_XRQ_DC_PARAMS_ENTRY:
 864         case MLX5_CMD_OP_RELEASE_XRQ_ERROR:
 865         case MLX5_CMD_OP_MODIFY_XRQ:
 866                 return true;
 867         case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
 868         {
 869                 u16 op_mod = MLX5_GET(set_fte_in, in, op_mod);
 870
 871                 if (op_mod == 1)
 872                         return true;
 873                 return false;
 874         }
 875         default:
 876                 return false;
 877         }
 878 }
 879
 880 static bool devx_is_obj_query_cmd(const void *in)
 881 {
 882         u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
 883
 884         switch (opcode) {
 885         case MLX5_CMD_OP_QUERY_GENERAL_OBJECT:
 886         case MLX5_CMD_OP_QUERY_MKEY:
 887         case MLX5_CMD_OP_QUERY_CQ:
 888         case MLX5_CMD_OP_QUERY_RMP:
 889         case MLX5_CMD_OP_QUERY_SQ:
 890         case MLX5_CMD_OP_QUERY_RQ:
 891         case MLX5_CMD_OP_QUERY_RQT:
 892         case MLX5_CMD_OP_QUERY_TIR:
 893         case MLX5_CMD_OP_QUERY_TIS:
 894         case MLX5_CMD_OP_QUERY_Q_COUNTER:
 895         case MLX5_CMD_OP_QUERY_FLOW_TABLE:
 896         case MLX5_CMD_OP_QUERY_FLOW_GROUP:
 897         case MLX5_CMD_OP_QUERY_FLOW_TABLE_ENTRY:
 898         case MLX5_CMD_OP_QUERY_FLOW_COUNTER:
 899         case MLX5_CMD_OP_QUERY_MODIFY_HEADER_CONTEXT:
 900         case MLX5_CMD_OP_QUERY_SCHEDULING_ELEMENT:
 901         case MLX5_CMD_OP_QUERY_L2_TABLE_ENTRY:
 902         case MLX5_CMD_OP_QUERY_QP:
 903         case MLX5_CMD_OP_QUERY_SRQ:
 904         case MLX5_CMD_OP_QUERY_XRC_SRQ:
 905         case MLX5_CMD_OP_QUERY_DCT:
 906         case MLX5_CMD_OP_QUERY_XRQ:
 907         case MLX5_CMD_OP_QUERY_XRQ_DC_PARAMS_ENTRY:
 908         case MLX5_CMD_OP_QUERY_XRQ_ERROR_PARAMS:
 909         case MLX5_CMD_OP_QUERY_PACKET_REFORMAT_CONTEXT:
 910                 return true;
 911         default:
 912                 return false;
 913         }
 914 }
 915
 916 static bool devx_is_whitelist_cmd(void *in)
 917 {
 918         u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
 919
 920         switch (opcode) {
 921         case MLX5_CMD_OP_QUERY_HCA_CAP:
 922         case MLX5_CMD_OP_QUERY_HCA_VPORT_CONTEXT:
 923         case MLX5_CMD_OP_QUERY_ESW_VPORT_CONTEXT:
 924         case MLX5_CMD_OP_QUERY_ESW_FUNCTIONS:
 925                 return true;
 926         default:
 927                 return false;
 928         }
 929 }
 930
 931 static int devx_get_uid(struct mlx5_ib_ucontext *c, void *cmd_in)
 932 {
 933         if (devx_is_whitelist_cmd(cmd_in)) {
 934                 struct mlx5_ib_dev *dev;
 935
 936                 if (c->devx_uid)
 937                         return c->devx_uid;
 938
 939                 dev = to_mdev(c->ibucontext.device);
 940                 if (dev->devx_whitelist_uid)
 941                         return dev->devx_whitelist_uid;
 942
 943                 return -EOPNOTSUPP;
 944         }
 945
 946         if (!c->devx_uid)
 947                 return -EINVAL;
 948
 949         return c->devx_uid;
 950 }
 951
 952 static bool devx_is_general_cmd(void *in, struct mlx5_ib_dev *dev)
 953 {
 954         u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
 955
 956         /* Pass all cmds for vhca_tunnel as general, tracking is done in FW */
 957         if ((MLX5_CAP_GEN_64(dev->mdev, vhca_tunnel_commands) &&
 958              MLX5_GET(general_obj_in_cmd_hdr, in, vhca_tunnel_id)) ||
 959             (opcode >= MLX5_CMD_OP_GENERAL_START &&
 960              opcode < MLX5_CMD_OP_GENERAL_END))
 961                 return true;
 962
 963         switch (opcode) {
 964         case MLX5_CMD_OP_QUERY_HCA_CAP:
 965         case MLX5_CMD_OP_QUERY_HCA_VPORT_CONTEXT:
 966         case MLX5_CMD_OP_QUERY_ESW_VPORT_CONTEXT:
 967         case MLX5_CMD_OP_QUERY_VPORT_STATE:
 968         case MLX5_CMD_OP_QUERY_ADAPTER:
 969         case MLX5_CMD_OP_QUERY_ISSI:
 970         case MLX5_CMD_OP_QUERY_NIC_VPORT_CONTEXT:
 971         case MLX5_CMD_OP_QUERY_ROCE_ADDRESS:
 972         case MLX5_CMD_OP_QUERY_VNIC_ENV:
 973         case MLX5_CMD_OP_QUERY_VPORT_COUNTER:
 974         case MLX5_CMD_OP_GET_DROPPED_PACKET_LOG:
 975         case MLX5_CMD_OP_NOP:
 976         case MLX5_CMD_OP_QUERY_CONG_STATUS:
 977         case MLX5_CMD_OP_QUERY_CONG_PARAMS:
 978         case MLX5_CMD_OP_QUERY_CONG_STATISTICS:
 979         case MLX5_CMD_OP_QUERY_LAG:
 980         case MLX5_CMD_OP_QUERY_ESW_FUNCTIONS:
 981                 return true;
 982         default:
 983                 return false;
 984         }
 985 }
 986
 987 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_QUERY_EQN)(
 988         struct uverbs_attr_bundle *attrs)
 989 {
 990         struct mlx5_ib_ucontext *c;
 991         struct mlx5_ib_dev *dev;
 992         int user_vector;
 993         int dev_eqn;
 994         int err;
 995
 996         if (uverbs_copy_from(&user_vector, attrs,
 997                              MLX5_IB_ATTR_DEVX_QUERY_EQN_USER_VEC))
 998                 return -EFAULT;
 999
1000         c = devx_ufile2uctx(attrs);
1001         if (IS_ERR(c))
1002                 return PTR_ERR(c);
1003         dev = to_mdev(c->ibucontext.device);
1004
1005         err = mlx5_comp_eqn_get(dev->mdev, user_vector, &dev_eqn);
1006         if (err < 0)
1007                 return err;
1008
1009         if (uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_QUERY_EQN_DEV_EQN,
1010                            &dev_eqn, sizeof(dev_eqn)))
1011                 return -EFAULT;
1012
1013         return 0;
1014 }
1015
1016 /*
1017  *Security note:
1018  * The hardware protection mechanism works like this: Each device object that
1019  * is subject to UAR doorbells (QP/SQ/CQ) gets a UAR ID (called uar_page in
1020  * the device specification manual) upon its creation. Then upon doorbell,
1021  * hardware fetches the object context for which the doorbell was rang, and
1022  * validates that the UAR through which the DB was rang matches the UAR ID
1023  * of the object.
1024  * If no match the doorbell is silently ignored by the hardware. Of course,
1025  * the user cannot ring a doorbell on a UAR that was not mapped to it.
1026  * Now in devx, as the devx kernel does not manipulate the QP/SQ/CQ command
1027  * mailboxes (except tagging them with UID), we expose to the user its UAR
1028  * ID, so it can embed it in these objects in the expected specification
1029  * format. So the only thing the user can do is hurt itself by creating a
1030  * QP/SQ/CQ with a UAR ID other than his, and then in this case other users
1031  * may ring a doorbell on its objects.
1032  * The consequence of that will be that another user can schedule a QP/SQ
1033  * of the buggy user for execution (just insert it to the hardware schedule
1034  * queue or arm its CQ for event generation), no further harm is expected.
1035  */
1036 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_QUERY_UAR)(
1037         struct uverbs_attr_bundle *attrs)
1038 {
1039         struct mlx5_ib_ucontext *c;
1040         struct mlx5_ib_dev *dev;
1041         u32 user_idx;
1042         s32 dev_idx;
1043
1044         c = devx_ufile2uctx(attrs);
1045         if (IS_ERR(c))
1046                 return PTR_ERR(c);
1047         dev = to_mdev(c->ibucontext.device);
1048
1049         if (uverbs_copy_from(&user_idx, attrs,
1050                              MLX5_IB_ATTR_DEVX_QUERY_UAR_USER_IDX))
1051                 return -EFAULT;
1052
1053         dev_idx = bfregn_to_uar_index(dev, &c->bfregi, user_idx, true);
1054         if (dev_idx < 0)
1055                 return dev_idx;
1056
1057         if (uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_QUERY_UAR_DEV_IDX,
1058                            &dev_idx, sizeof(dev_idx)))
1059                 return -EFAULT;
1060
1061         return 0;
1062 }
1063
1064 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OTHER)(
1065         struct uverbs_attr_bundle *attrs)
1066 {
1067         struct mlx5_ib_ucontext *c;
1068         struct mlx5_ib_dev *dev;
1069         void *cmd_in = uverbs_attr_get_alloced_ptr(
1070                 attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_IN);
1071         int cmd_out_len = uverbs_attr_get_len(attrs,
1072                                         MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT);
1073         void *cmd_out;
1074         int err, err2;
1075         int uid;
1076
1077         c = devx_ufile2uctx(attrs);
1078         if (IS_ERR(c))
1079                 return PTR_ERR(c);
1080         dev = to_mdev(c->ibucontext.device);
1081
1082         uid = devx_get_uid(c, cmd_in);
1083         if (uid < 0)
1084                 return uid;
1085
1086         /* Only white list of some general HCA commands are allowed for this method. */
1087         if (!devx_is_general_cmd(cmd_in, dev))
1088                 return -EINVAL;
1089
1090         cmd_out = uverbs_zalloc(attrs, cmd_out_len);
1091         if (IS_ERR(cmd_out))
1092                 return PTR_ERR(cmd_out);
1093
1094         MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1095         err = mlx5_cmd_do(dev->mdev, cmd_in,
1096                           uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_IN),
1097                           cmd_out, cmd_out_len);
1098         if (err && err != -EREMOTEIO)
1099                 return err;
1100
1101         err2 = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT, cmd_out,
1102                               cmd_out_len);
1103
1104         return err2 ?: err;
1105 }
1106
1107 static void devx_obj_build_destroy_cmd(void *in, void *out, void *din,
1108                                        u32 *dinlen,
1109                                        u32 *obj_id)
1110 {
1111         u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
1112         u16 uid = MLX5_GET(general_obj_in_cmd_hdr, in, uid);
1113
1114         *obj_id = devx_get_created_obj_id(in, out, opcode);
1115         *dinlen = MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr);
1116         MLX5_SET(general_obj_in_cmd_hdr, din, uid, uid);
1117
1118         switch (opcode) {
1119         case MLX5_CMD_OP_CREATE_GENERAL_OBJECT:
1120                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_GENERAL_OBJECT);
1121                 MLX5_SET(general_obj_in_cmd_hdr, din, obj_id, *obj_id);
1122                 MLX5_SET(general_obj_in_cmd_hdr, din, obj_type,
1123                          MLX5_GET(general_obj_in_cmd_hdr, in, obj_type));
1124                 break;
1125
1126         case MLX5_CMD_OP_CREATE_UMEM:
1127                 MLX5_SET(destroy_umem_in, din, opcode,
1128                          MLX5_CMD_OP_DESTROY_UMEM);
1129                 MLX5_SET(destroy_umem_in, din, umem_id, *obj_id);
1130                 break;
1131         case MLX5_CMD_OP_CREATE_MKEY:
1132                 MLX5_SET(destroy_mkey_in, din, opcode,
1133                          MLX5_CMD_OP_DESTROY_MKEY);
1134                 MLX5_SET(destroy_mkey_in, din, mkey_index, *obj_id);
1135                 break;
1136         case MLX5_CMD_OP_CREATE_CQ:
1137                 MLX5_SET(destroy_cq_in, din, opcode, MLX5_CMD_OP_DESTROY_CQ);
1138                 MLX5_SET(destroy_cq_in, din, cqn, *obj_id);
1139                 break;
1140         case MLX5_CMD_OP_ALLOC_PD:
1141                 MLX5_SET(dealloc_pd_in, din, opcode, MLX5_CMD_OP_DEALLOC_PD);
1142                 MLX5_SET(dealloc_pd_in, din, pd, *obj_id);
1143                 break;
1144         case MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN:
1145                 MLX5_SET(dealloc_transport_domain_in, din, opcode,
1146                          MLX5_CMD_OP_DEALLOC_TRANSPORT_DOMAIN);
1147                 MLX5_SET(dealloc_transport_domain_in, din, transport_domain,
1148                          *obj_id);
1149                 break;
1150         case MLX5_CMD_OP_CREATE_RMP:
1151                 MLX5_SET(destroy_rmp_in, din, opcode, MLX5_CMD_OP_DESTROY_RMP);
1152                 MLX5_SET(destroy_rmp_in, din, rmpn, *obj_id);
1153                 break;
1154         case MLX5_CMD_OP_CREATE_SQ:
1155                 MLX5_SET(destroy_sq_in, din, opcode, MLX5_CMD_OP_DESTROY_SQ);
1156                 MLX5_SET(destroy_sq_in, din, sqn, *obj_id);
1157                 break;
1158         case MLX5_CMD_OP_CREATE_RQ:
1159                 MLX5_SET(destroy_rq_in, din, opcode, MLX5_CMD_OP_DESTROY_RQ);
1160                 MLX5_SET(destroy_rq_in, din, rqn, *obj_id);
1161                 break;
1162         case MLX5_CMD_OP_CREATE_RQT:
1163                 MLX5_SET(destroy_rqt_in, din, opcode, MLX5_CMD_OP_DESTROY_RQT);
1164                 MLX5_SET(destroy_rqt_in, din, rqtn, *obj_id);
1165                 break;
1166         case MLX5_CMD_OP_CREATE_TIR:
1167                 MLX5_SET(destroy_tir_in, din, opcode, MLX5_CMD_OP_DESTROY_TIR);
1168                 MLX5_SET(destroy_tir_in, din, tirn, *obj_id);
1169                 break;
1170         case MLX5_CMD_OP_CREATE_TIS:
1171                 MLX5_SET(destroy_tis_in, din, opcode, MLX5_CMD_OP_DESTROY_TIS);
1172                 MLX5_SET(destroy_tis_in, din, tisn, *obj_id);
1173                 break;
1174         case MLX5_CMD_OP_ALLOC_Q_COUNTER:
1175                 MLX5_SET(dealloc_q_counter_in, din, opcode,
1176                          MLX5_CMD_OP_DEALLOC_Q_COUNTER);
1177                 MLX5_SET(dealloc_q_counter_in, din, counter_set_id, *obj_id);
1178                 break;
1179         case MLX5_CMD_OP_CREATE_FLOW_TABLE:
1180                 *dinlen = MLX5_ST_SZ_BYTES(destroy_flow_table_in);
1181                 MLX5_SET(destroy_flow_table_in, din, other_vport,
1182                          MLX5_GET(create_flow_table_in,  in, other_vport));
1183                 MLX5_SET(destroy_flow_table_in, din, vport_number,
1184                          MLX5_GET(create_flow_table_in,  in, vport_number));
1185                 MLX5_SET(destroy_flow_table_in, din, table_type,
1186                          MLX5_GET(create_flow_table_in,  in, table_type));
1187                 MLX5_SET(destroy_flow_table_in, din, table_id, *obj_id);
1188                 MLX5_SET(destroy_flow_table_in, din, opcode,
1189                          MLX5_CMD_OP_DESTROY_FLOW_TABLE);
1190                 break;
1191         case MLX5_CMD_OP_CREATE_FLOW_GROUP:
1192                 *dinlen = MLX5_ST_SZ_BYTES(destroy_flow_group_in);
1193                 MLX5_SET(destroy_flow_group_in, din, other_vport,
1194                          MLX5_GET(create_flow_group_in, in, other_vport));
1195                 MLX5_SET(destroy_flow_group_in, din, vport_number,
1196                          MLX5_GET(create_flow_group_in, in, vport_number));
1197                 MLX5_SET(destroy_flow_group_in, din, table_type,
1198                          MLX5_GET(create_flow_group_in, in, table_type));
1199                 MLX5_SET(destroy_flow_group_in, din, table_id,
1200                          MLX5_GET(create_flow_group_in, in, table_id));
1201                 MLX5_SET(destroy_flow_group_in, din, group_id, *obj_id);
1202                 MLX5_SET(destroy_flow_group_in, din, opcode,
1203                          MLX5_CMD_OP_DESTROY_FLOW_GROUP);
1204                 break;
1205         case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
1206                 *dinlen = MLX5_ST_SZ_BYTES(delete_fte_in);
1207                 MLX5_SET(delete_fte_in, din, other_vport,
1208                          MLX5_GET(set_fte_in,  in, other_vport));
1209                 MLX5_SET(delete_fte_in, din, vport_number,
1210                          MLX5_GET(set_fte_in, in, vport_number));
1211                 MLX5_SET(delete_fte_in, din, table_type,
1212                          MLX5_GET(set_fte_in, in, table_type));
1213                 MLX5_SET(delete_fte_in, din, table_id,
1214                          MLX5_GET(set_fte_in, in, table_id));
1215                 MLX5_SET(delete_fte_in, din, flow_index, *obj_id);
1216                 MLX5_SET(delete_fte_in, din, opcode,
1217                          MLX5_CMD_OP_DELETE_FLOW_TABLE_ENTRY);
1218                 break;
1219         case MLX5_CMD_OP_ALLOC_FLOW_COUNTER:
1220                 MLX5_SET(dealloc_flow_counter_in, din, opcode,
1221                          MLX5_CMD_OP_DEALLOC_FLOW_COUNTER);
1222                 MLX5_SET(dealloc_flow_counter_in, din, flow_counter_id,
1223                          *obj_id);
1224                 break;
1225         case MLX5_CMD_OP_ALLOC_PACKET_REFORMAT_CONTEXT:
1226                 MLX5_SET(dealloc_packet_reformat_context_in, din, opcode,
1227                          MLX5_CMD_OP_DEALLOC_PACKET_REFORMAT_CONTEXT);
1228                 MLX5_SET(dealloc_packet_reformat_context_in, din,
1229                          packet_reformat_id, *obj_id);
1230                 break;
1231         case MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT:
1232                 MLX5_SET(dealloc_modify_header_context_in, din, opcode,
1233                          MLX5_CMD_OP_DEALLOC_MODIFY_HEADER_CONTEXT);
1234                 MLX5_SET(dealloc_modify_header_context_in, din,
1235                          modify_header_id, *obj_id);
1236                 break;
1237         case MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT:
1238                 *dinlen = MLX5_ST_SZ_BYTES(destroy_scheduling_element_in);
1239                 MLX5_SET(destroy_scheduling_element_in, din,
1240                          scheduling_hierarchy,
1241                          MLX5_GET(create_scheduling_element_in, in,
1242                                   scheduling_hierarchy));
1243                 MLX5_SET(destroy_scheduling_element_in, din,
1244                          scheduling_element_id, *obj_id);
1245                 MLX5_SET(destroy_scheduling_element_in, din, opcode,
1246                          MLX5_CMD_OP_DESTROY_SCHEDULING_ELEMENT);
1247                 break;
1248         case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
1249                 *dinlen = MLX5_ST_SZ_BYTES(delete_vxlan_udp_dport_in);
1250                 MLX5_SET(delete_vxlan_udp_dport_in, din, vxlan_udp_port, *obj_id);
1251                 MLX5_SET(delete_vxlan_udp_dport_in, din, opcode,
1252                          MLX5_CMD_OP_DELETE_VXLAN_UDP_DPORT);
1253                 break;
1254         case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
1255                 *dinlen = MLX5_ST_SZ_BYTES(delete_l2_table_entry_in);
1256                 MLX5_SET(delete_l2_table_entry_in, din, table_index, *obj_id);
1257                 MLX5_SET(delete_l2_table_entry_in, din, opcode,
1258                          MLX5_CMD_OP_DELETE_L2_TABLE_ENTRY);
1259                 break;
1260         case MLX5_CMD_OP_CREATE_QP:
1261                 MLX5_SET(destroy_qp_in, din, opcode, MLX5_CMD_OP_DESTROY_QP);
1262                 MLX5_SET(destroy_qp_in, din, qpn, *obj_id);
1263                 break;
1264         case MLX5_CMD_OP_CREATE_SRQ:
1265                 MLX5_SET(destroy_srq_in, din, opcode, MLX5_CMD_OP_DESTROY_SRQ);
1266                 MLX5_SET(destroy_srq_in, din, srqn, *obj_id);
1267                 break;
1268         case MLX5_CMD_OP_CREATE_XRC_SRQ:
1269                 MLX5_SET(destroy_xrc_srq_in, din, opcode,
1270                          MLX5_CMD_OP_DESTROY_XRC_SRQ);
1271                 MLX5_SET(destroy_xrc_srq_in, din, xrc_srqn, *obj_id);
1272                 break;
1273         case MLX5_CMD_OP_CREATE_DCT:
1274                 MLX5_SET(destroy_dct_in, din, opcode, MLX5_CMD_OP_DESTROY_DCT);
1275                 MLX5_SET(destroy_dct_in, din, dctn, *obj_id);
1276                 break;
1277         case MLX5_CMD_OP_CREATE_XRQ:
1278                 MLX5_SET(destroy_xrq_in, din, opcode, MLX5_CMD_OP_DESTROY_XRQ);
1279                 MLX5_SET(destroy_xrq_in, din, xrqn, *obj_id);
1280                 break;
1281         case MLX5_CMD_OP_ATTACH_TO_MCG:
1282                 *dinlen = MLX5_ST_SZ_BYTES(detach_from_mcg_in);
1283                 MLX5_SET(detach_from_mcg_in, din, qpn,
1284                          MLX5_GET(attach_to_mcg_in, in, qpn));
1285                 memcpy(MLX5_ADDR_OF(detach_from_mcg_in, din, multicast_gid),
1286                        MLX5_ADDR_OF(attach_to_mcg_in, in, multicast_gid),
1287                        MLX5_FLD_SZ_BYTES(attach_to_mcg_in, multicast_gid));
1288                 MLX5_SET(detach_from_mcg_in, din, opcode,
1289                          MLX5_CMD_OP_DETACH_FROM_MCG);
1290                 MLX5_SET(detach_from_mcg_in, din, qpn, *obj_id);
1291                 break;
1292         case MLX5_CMD_OP_ALLOC_XRCD:
1293                 MLX5_SET(dealloc_xrcd_in, din, opcode,
1294                          MLX5_CMD_OP_DEALLOC_XRCD);
1295                 MLX5_SET(dealloc_xrcd_in, din, xrcd, *obj_id);
1296                 break;
1297         case MLX5_CMD_OP_CREATE_PSV:
1298                 MLX5_SET(destroy_psv_in, din, opcode,
1299                          MLX5_CMD_OP_DESTROY_PSV);
1300                 MLX5_SET(destroy_psv_in, din, psvn, *obj_id);
1301                 break;
1302         default:
1303                 /* The entry must match to one of the devx_is_obj_create_cmd */
1304                 WARN_ON(true);
1305                 break;
1306         }
1307 }
1308
1309 static int devx_handle_mkey_indirect(struct devx_obj *obj,
1310                                      struct mlx5_ib_dev *dev,
1311                                      void *in, void *out)
1312 {
1313         struct mlx5_ib_mkey *mkey = &obj->mkey;
1314         void *mkc;
1315         u8 key;
1316
1317         mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry);
1318         key = MLX5_GET(mkc, mkc, mkey_7_0);
1319         mkey->key = mlx5_idx_to_mkey(
1320                         MLX5_GET(create_mkey_out, out, mkey_index)) | key;
1321         mkey->type = MLX5_MKEY_INDIRECT_DEVX;
1322         mkey->ndescs = MLX5_GET(mkc, mkc, translations_octword_size);
1323         init_waitqueue_head(&mkey->wait);
1324
1325         return mlx5r_store_odp_mkey(dev, mkey);
1326 }
1327
1328 static int devx_handle_mkey_create(struct mlx5_ib_dev *dev,
1329                                    struct devx_obj *obj,
1330                                    void *in, int in_len)
1331 {
1332         int min_len = MLX5_BYTE_OFF(create_mkey_in, memory_key_mkey_entry) +
1333                         MLX5_FLD_SZ_BYTES(create_mkey_in,
1334                         memory_key_mkey_entry);
1335         void *mkc;
1336         u8 access_mode;
1337
1338         if (in_len < min_len)
1339                 return -EINVAL;
1340
1341         mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry);
1342
1343         access_mode = MLX5_GET(mkc, mkc, access_mode_1_0);
1344         access_mode |= MLX5_GET(mkc, mkc, access_mode_4_2) << 2;
1345
1346         if (access_mode == MLX5_MKC_ACCESS_MODE_KLMS ||
1347                 access_mode == MLX5_MKC_ACCESS_MODE_KSM) {
1348                 if (IS_ENABLED(CONFIG_INFINIBAND_ON_DEMAND_PAGING))
1349                         obj->flags |= DEVX_OBJ_FLAGS_INDIRECT_MKEY;
1350                 return 0;
1351         }
1352
1353         MLX5_SET(create_mkey_in, in, mkey_umem_valid, 1);
1354         return 0;
1355 }
1356
1357 static void devx_cleanup_subscription(struct mlx5_ib_dev *dev,
1358                                       struct devx_event_subscription *sub)
1359 {
1360         struct devx_event *event;
1361         struct devx_obj_event *xa_val_level2;
1362
1363         if (sub->is_cleaned)
1364                 return;
1365
1366         sub->is_cleaned = 1;
1367         list_del_rcu(&sub->xa_list);
1368
1369         if (list_empty(&sub->obj_list))
1370                 return;
1371
1372         list_del_rcu(&sub->obj_list);
1373         /* check whether key level 1 for this obj_sub_list is empty */
1374         event = xa_load(&dev->devx_event_table.event_xa,
1375                         sub->xa_key_level1);
1376         WARN_ON(!event);
1377
1378         xa_val_level2 = xa_load(&event->object_ids, sub->xa_key_level2);
1379         if (list_empty(&xa_val_level2->obj_sub_list)) {
1380                 xa_erase(&event->object_ids,
1381                          sub->xa_key_level2);
1382                 kfree_rcu(xa_val_level2, rcu);
1383         }
1384 }
1385
1386 static int devx_obj_cleanup(struct ib_uobject *uobject,
1387                             enum rdma_remove_reason why,
1388                             struct uverbs_attr_bundle *attrs)
1389 {
1390         u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
1391         struct mlx5_devx_event_table *devx_event_table;
1392         struct devx_obj *obj = uobject->object;
1393         struct devx_event_subscription *sub_entry, *tmp;
1394         struct mlx5_ib_dev *dev;
1395         int ret;
1396
1397         dev = mlx5_udata_to_mdev(&attrs->driver_udata);
1398         if (obj->flags & DEVX_OBJ_FLAGS_INDIRECT_MKEY &&
1399             xa_erase(&obj->ib_dev->odp_mkeys,
1400                      mlx5_base_mkey(obj->mkey.key)))
1401                 /*
1402                  * The pagefault_single_data_segment() does commands against
1403                  * the mmkey, we must wait for that to stop before freeing the
1404                  * mkey, as another allocation could get the same mkey #.
1405                  */
1406                 mlx5r_deref_wait_odp_mkey(&obj->mkey);
1407
1408         if (obj->flags & DEVX_OBJ_FLAGS_DCT)
1409                 ret = mlx5_core_destroy_dct(obj->ib_dev, &obj->core_dct);
1410         else if (obj->flags & DEVX_OBJ_FLAGS_CQ)
1411                 ret = mlx5_core_destroy_cq(obj->ib_dev->mdev, &obj->core_cq);
1412         else
1413                 ret = mlx5_cmd_exec(obj->ib_dev->mdev, obj->dinbox,
1414                                     obj->dinlen, out, sizeof(out));
1415         if (ret)
1416                 return ret;
1417
1418         devx_event_table = &dev->devx_event_table;
1419
1420         mutex_lock(&devx_event_table->event_xa_lock);
1421         list_for_each_entry_safe(sub_entry, tmp, &obj->event_sub, obj_list)
1422                 devx_cleanup_subscription(dev, sub_entry);
1423         mutex_unlock(&devx_event_table->event_xa_lock);
1424
1425         kfree(obj);
1426         return ret;
1427 }
1428
1429 static void devx_cq_comp(struct mlx5_core_cq *mcq, struct mlx5_eqe *eqe)
1430 {
1431         struct devx_obj *obj = container_of(mcq, struct devx_obj, core_cq);
1432         struct mlx5_devx_event_table *table;
1433         struct devx_event *event;
1434         struct devx_obj_event *obj_event;
1435         u32 obj_id = mcq->cqn;
1436
1437         table = &obj->ib_dev->devx_event_table;
1438         rcu_read_lock();
1439         event = xa_load(&table->event_xa, MLX5_EVENT_TYPE_COMP);
1440         if (!event)
1441                 goto out;
1442
1443         obj_event = xa_load(&event->object_ids, obj_id);
1444         if (!obj_event)
1445                 goto out;
1446
1447         dispatch_event_fd(&obj_event->obj_sub_list, eqe);
1448 out:
1449         rcu_read_unlock();
1450 }
1451
1452 static bool is_apu_cq(struct mlx5_ib_dev *dev, const void *in)
1453 {
1454         if (!MLX5_CAP_GEN(dev->mdev, apu) ||
1455             !MLX5_GET(cqc, MLX5_ADDR_OF(create_cq_in, in, cq_context), apu_cq))
1456                 return false;
1457
1458         return true;
1459 }
1460
1461 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_CREATE)(
1462         struct uverbs_attr_bundle *attrs)
1463 {
1464         void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN);
1465         int cmd_out_len =  uverbs_attr_get_len(attrs,
1466                                         MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT);
1467         int cmd_in_len = uverbs_attr_get_len(attrs,
1468                                         MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN);
1469         void *cmd_out;
1470         struct ib_uobject *uobj = uverbs_attr_get_uobject(
1471                 attrs, MLX5_IB_ATTR_DEVX_OBJ_CREATE_HANDLE);
1472         struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1473                 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1474         struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
1475         u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
1476         struct devx_obj *obj;
1477         u16 obj_type = 0;
1478         int err, err2 = 0;
1479         int uid;
1480         u32 obj_id;
1481         u16 opcode;
1482
1483         if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id))
1484                 return -EINVAL;
1485
1486         uid = devx_get_uid(c, cmd_in);
1487         if (uid < 0)
1488                 return uid;
1489
1490         if (!devx_is_obj_create_cmd(cmd_in, &opcode))
1491                 return -EINVAL;
1492
1493         cmd_out = uverbs_zalloc(attrs, cmd_out_len);
1494         if (IS_ERR(cmd_out))
1495                 return PTR_ERR(cmd_out);
1496
1497         obj = kzalloc(sizeof(struct devx_obj), GFP_KERNEL);
1498         if (!obj)
1499                 return -ENOMEM;
1500
1501         MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1502         if (opcode == MLX5_CMD_OP_CREATE_MKEY) {
1503                 err = devx_handle_mkey_create(dev, obj, cmd_in, cmd_in_len);
1504                 if (err)
1505                         goto obj_free;
1506         } else {
1507                 devx_set_umem_valid(cmd_in);
1508         }
1509
1510         if (opcode == MLX5_CMD_OP_CREATE_DCT) {
1511                 obj->flags |= DEVX_OBJ_FLAGS_DCT;
1512                 err = mlx5_core_create_dct(dev, &obj->core_dct, cmd_in,
1513                                            cmd_in_len, cmd_out, cmd_out_len);
1514         } else if (opcode == MLX5_CMD_OP_CREATE_CQ &&
1515                    !is_apu_cq(dev, cmd_in)) {
1516                 obj->flags |= DEVX_OBJ_FLAGS_CQ;
1517                 obj->core_cq.comp = devx_cq_comp;
1518                 err = mlx5_create_cq(dev->mdev, &obj->core_cq,
1519                                      cmd_in, cmd_in_len, cmd_out,
1520                                      cmd_out_len);
1521         } else {
1522                 err = mlx5_cmd_do(dev->mdev, cmd_in, cmd_in_len,
1523                                   cmd_out, cmd_out_len);
1524         }
1525
1526         if (err == -EREMOTEIO)
1527                 err2 = uverbs_copy_to(attrs,
1528                                       MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT,
1529                                       cmd_out, cmd_out_len);
1530         if (err)
1531                 goto obj_free;
1532
1533         if (opcode == MLX5_CMD_OP_ALLOC_FLOW_COUNTER) {
1534                 u32 bulk = MLX5_GET(alloc_flow_counter_in,
1535                                     cmd_in,
1536                                     flow_counter_bulk_log_size);
1537
1538                 if (bulk)
1539                         bulk = 1 << bulk;
1540                 else
1541                         bulk = 128UL * MLX5_GET(alloc_flow_counter_in,
1542                                                 cmd_in,
1543                                                 flow_counter_bulk);
1544                 obj->flow_counter_bulk_size = bulk;
1545         }
1546
1547         uobj->object = obj;
1548         INIT_LIST_HEAD(&obj->event_sub);
1549         obj->ib_dev = dev;
1550         devx_obj_build_destroy_cmd(cmd_in, cmd_out, obj->dinbox, &obj->dinlen,
1551                                    &obj_id);
1552         WARN_ON(obj->dinlen > MLX5_MAX_DESTROY_INBOX_SIZE_DW * sizeof(u32));
1553
1554         err = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT, cmd_out, cmd_out_len);
1555         if (err)
1556                 goto obj_destroy;
1557
1558         if (opcode == MLX5_CMD_OP_CREATE_GENERAL_OBJECT)
1559                 obj_type = MLX5_GET(general_obj_in_cmd_hdr, cmd_in, obj_type);
1560         obj->obj_id = get_enc_obj_id(opcode | obj_type << 16, obj_id);
1561
1562         if (obj->flags & DEVX_OBJ_FLAGS_INDIRECT_MKEY) {
1563                 err = devx_handle_mkey_indirect(obj, dev, cmd_in, cmd_out);
1564                 if (err)
1565                         goto obj_destroy;
1566         }
1567         return 0;
1568
1569 obj_destroy:
1570         if (obj->flags & DEVX_OBJ_FLAGS_DCT)
1571                 mlx5_core_destroy_dct(obj->ib_dev, &obj->core_dct);
1572         else if (obj->flags & DEVX_OBJ_FLAGS_CQ)
1573                 mlx5_core_destroy_cq(obj->ib_dev->mdev, &obj->core_cq);
1574         else
1575                 mlx5_cmd_exec(obj->ib_dev->mdev, obj->dinbox, obj->dinlen, out,
1576                               sizeof(out));
1577 obj_free:
1578         kfree(obj);
1579         return err2 ?: err;
1580 }
1581
1582 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_MODIFY)(
1583         struct uverbs_attr_bundle *attrs)
1584 {
1585         void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN);
1586         int cmd_out_len = uverbs_attr_get_len(attrs,
1587                                         MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT);
1588         struct ib_uobject *uobj = uverbs_attr_get_uobject(attrs,
1589                                                           MLX5_IB_ATTR_DEVX_OBJ_MODIFY_HANDLE);
1590         struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1591                 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1592         struct mlx5_ib_dev *mdev = to_mdev(c->ibucontext.device);
1593         void *cmd_out;
1594         int err, err2;
1595         int uid;
1596
1597         if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id))
1598                 return -EINVAL;
1599
1600         uid = devx_get_uid(c, cmd_in);
1601         if (uid < 0)
1602                 return uid;
1603
1604         if (!devx_is_obj_modify_cmd(cmd_in))
1605                 return -EINVAL;
1606
1607         if (!devx_is_valid_obj_id(attrs, uobj, cmd_in))
1608                 return -EINVAL;
1609
1610         cmd_out = uverbs_zalloc(attrs, cmd_out_len);
1611         if (IS_ERR(cmd_out))
1612                 return PTR_ERR(cmd_out);
1613
1614         MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1615         devx_set_umem_valid(cmd_in);
1616
1617         err = mlx5_cmd_do(mdev->mdev, cmd_in,
1618                           uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN),
1619                           cmd_out, cmd_out_len);
1620         if (err && err != -EREMOTEIO)
1621                 return err;
1622
1623         err2 = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT,
1624                               cmd_out, cmd_out_len);
1625
1626         return err2 ?: err;
1627 }
1628
1629 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_QUERY)(
1630         struct uverbs_attr_bundle *attrs)
1631 {
1632         void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN);
1633         int cmd_out_len = uverbs_attr_get_len(attrs,
1634                                               MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT);
1635         struct ib_uobject *uobj = uverbs_attr_get_uobject(attrs,
1636                                                           MLX5_IB_ATTR_DEVX_OBJ_QUERY_HANDLE);
1637         struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1638                 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1639         void *cmd_out;
1640         int err, err2;
1641         int uid;
1642         struct mlx5_ib_dev *mdev = to_mdev(c->ibucontext.device);
1643
1644         if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id))
1645                 return -EINVAL;
1646
1647         uid = devx_get_uid(c, cmd_in);
1648         if (uid < 0)
1649                 return uid;
1650
1651         if (!devx_is_obj_query_cmd(cmd_in))
1652                 return -EINVAL;
1653
1654         if (!devx_is_valid_obj_id(attrs, uobj, cmd_in))
1655                 return -EINVAL;
1656
1657         cmd_out = uverbs_zalloc(attrs, cmd_out_len);
1658         if (IS_ERR(cmd_out))
1659                 return PTR_ERR(cmd_out);
1660
1661         MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1662         err = mlx5_cmd_do(mdev->mdev, cmd_in,
1663                           uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN),
1664                           cmd_out, cmd_out_len);
1665         if (err && err != -EREMOTEIO)
1666                 return err;
1667
1668         err2 = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT,
1669                               cmd_out, cmd_out_len);
1670
1671         return err2 ?: err;
1672 }
1673
1674 struct devx_async_event_queue {
1675         spinlock_t              lock;
1676         wait_queue_head_t       poll_wait;
1677         struct list_head        event_list;
1678         atomic_t                bytes_in_use;
1679         u8                      is_destroyed:1;
1680 };
1681
1682 struct devx_async_cmd_event_file {
1683         struct ib_uobject               uobj;
1684         struct devx_async_event_queue   ev_queue;
1685         struct mlx5_async_ctx           async_ctx;
1686 };
1687
1688 static void devx_init_event_queue(struct devx_async_event_queue *ev_queue)
1689 {
1690         spin_lock_init(&ev_queue->lock);
1691         INIT_LIST_HEAD(&ev_queue->event_list);
1692         init_waitqueue_head(&ev_queue->poll_wait);
1693         atomic_set(&ev_queue->bytes_in_use, 0);
1694         ev_queue->is_destroyed = 0;
1695 }
1696
1697 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC)(
1698         struct uverbs_attr_bundle *attrs)
1699 {
1700         struct devx_async_cmd_event_file *ev_file;
1701
1702         struct ib_uobject *uobj = uverbs_attr_get_uobject(
1703                 attrs, MLX5_IB_ATTR_DEVX_ASYNC_CMD_FD_ALLOC_HANDLE);
1704         struct mlx5_ib_dev *mdev = mlx5_udata_to_mdev(&attrs->driver_udata);
1705
1706         ev_file = container_of(uobj, struct devx_async_cmd_event_file,
1707                                uobj);
1708         devx_init_event_queue(&ev_file->ev_queue);
1709         mlx5_cmd_init_async_ctx(mdev->mdev, &ev_file->async_ctx);
1710         return 0;
1711 }
1712
1713 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC)(
1714         struct uverbs_attr_bundle *attrs)
1715 {
1716         struct ib_uobject *uobj = uverbs_attr_get_uobject(
1717                 attrs, MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_HANDLE);
1718         struct devx_async_event_file *ev_file;
1719         struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1720                 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1721         struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
1722         u32 flags;
1723         int err;
1724
1725         err = uverbs_get_flags32(&flags, attrs,
1726                 MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_FLAGS,
1727                 MLX5_IB_UAPI_DEVX_CR_EV_CH_FLAGS_OMIT_DATA);
1728
1729         if (err)
1730                 return err;
1731
1732         ev_file = container_of(uobj, struct devx_async_event_file,
1733                                uobj);
1734         spin_lock_init(&ev_file->lock);
1735         INIT_LIST_HEAD(&ev_file->event_list);
1736         init_waitqueue_head(&ev_file->poll_wait);
1737         if (flags & MLX5_IB_UAPI_DEVX_CR_EV_CH_FLAGS_OMIT_DATA)
1738                 ev_file->omit_data = 1;
1739         INIT_LIST_HEAD(&ev_file->subscribed_events_list);
1740         ev_file->dev = dev;
1741         get_device(&dev->ib_dev.dev);
1742         return 0;
1743 }
1744
1745 static void devx_query_callback(int status, struct mlx5_async_work *context)
1746 {
1747         struct devx_async_data *async_data =
1748                 container_of(context, struct devx_async_data, cb_work);
1749         struct devx_async_cmd_event_file *ev_file = async_data->ev_file;
1750         struct devx_async_event_queue *ev_queue = &ev_file->ev_queue;
1751         unsigned long flags;
1752
1753         /*
1754          * Note that if the struct devx_async_cmd_event_file uobj begins to be
1755          * destroyed it will block at mlx5_cmd_cleanup_async_ctx() until this
1756          * routine returns, ensuring that it always remains valid here.
1757          */
1758         spin_lock_irqsave(&ev_queue->lock, flags);
1759         list_add_tail(&async_data->list, &ev_queue->event_list);
1760         spin_unlock_irqrestore(&ev_queue->lock, flags);
1761
1762         wake_up_interruptible(&ev_queue->poll_wait);
1763 }
1764
1765 #define MAX_ASYNC_BYTES_IN_USE (1024 * 1024) /* 1MB */
1766
1767 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_ASYNC_QUERY)(
1768         struct uverbs_attr_bundle *attrs)
1769 {
1770         void *cmd_in = uverbs_attr_get_alloced_ptr(attrs,
1771                                 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_CMD_IN);
1772         struct ib_uobject *uobj = uverbs_attr_get_uobject(
1773                                 attrs,
1774                                 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_HANDLE);
1775         u16 cmd_out_len;
1776         struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1777                 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1778         struct ib_uobject *fd_uobj;
1779         int err;
1780         int uid;
1781         struct mlx5_ib_dev *mdev = to_mdev(c->ibucontext.device);
1782         struct devx_async_cmd_event_file *ev_file;
1783         struct devx_async_data *async_data;
1784
1785         if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id))
1786                 return -EINVAL;
1787
1788         uid = devx_get_uid(c, cmd_in);
1789         if (uid < 0)
1790                 return uid;
1791
1792         if (!devx_is_obj_query_cmd(cmd_in))
1793                 return -EINVAL;
1794
1795         err = uverbs_get_const(&cmd_out_len, attrs,
1796                                MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_OUT_LEN);
1797         if (err)
1798                 return err;
1799
1800         if (!devx_is_valid_obj_id(attrs, uobj, cmd_in))
1801                 return -EINVAL;
1802
1803         fd_uobj = uverbs_attr_get_uobject(attrs,
1804                                 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_FD);
1805         if (IS_ERR(fd_uobj))
1806                 return PTR_ERR(fd_uobj);
1807
1808         ev_file = container_of(fd_uobj, struct devx_async_cmd_event_file,
1809                                uobj);
1810
1811         if (atomic_add_return(cmd_out_len, &ev_file->ev_queue.bytes_in_use) >
1812                         MAX_ASYNC_BYTES_IN_USE) {
1813                 atomic_sub(cmd_out_len, &ev_file->ev_queue.bytes_in_use);
1814                 return -EAGAIN;
1815         }
1816
1817         async_data = kvzalloc(struct_size(async_data, hdr.out_data,
1818                                           cmd_out_len), GFP_KERNEL);
1819         if (!async_data) {
1820                 err = -ENOMEM;
1821                 goto sub_bytes;
1822         }
1823
1824         err = uverbs_copy_from(&async_data->hdr.wr_id, attrs,
1825                                MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_WR_ID);
1826         if (err)
1827                 goto free_async;
1828
1829         async_data->cmd_out_len = cmd_out_len;
1830         async_data->mdev = mdev;
1831         async_data->ev_file = ev_file;
1832
1833         MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1834         err = mlx5_cmd_exec_cb(&ev_file->async_ctx, cmd_in,
1835                     uverbs_attr_get_len(attrs,
1836                                 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_CMD_IN),
1837                     async_data->hdr.out_data,
1838                     async_data->cmd_out_len,
1839                     devx_query_callback, &async_data->cb_work);
1840
1841         if (err)
1842                 goto free_async;
1843
1844         return 0;
1845
1846 free_async:
1847         kvfree(async_data);
1848 sub_bytes:
1849         atomic_sub(cmd_out_len, &ev_file->ev_queue.bytes_in_use);
1850         return err;
1851 }
1852
1853 static void
1854 subscribe_event_xa_dealloc(struct mlx5_devx_event_table *devx_event_table,
1855                            u32 key_level1,
1856                            bool is_level2,
1857                            u32 key_level2)
1858 {
1859         struct devx_event *event;
1860         struct devx_obj_event *xa_val_level2;
1861
1862         /* Level 1 is valid for future use, no need to free */
1863         if (!is_level2)
1864                 return;
1865
1866         event = xa_load(&devx_event_table->event_xa, key_level1);
1867         WARN_ON(!event);
1868
1869         xa_val_level2 = xa_load(&event->object_ids,
1870                                 key_level2);
1871         if (list_empty(&xa_val_level2->obj_sub_list)) {
1872                 xa_erase(&event->object_ids,
1873                          key_level2);
1874                 kfree_rcu(xa_val_level2, rcu);
1875         }
1876 }
1877
1878 static int
1879 subscribe_event_xa_alloc(struct mlx5_devx_event_table *devx_event_table,
1880                          u32 key_level1,
1881                          bool is_level2,
1882                          u32 key_level2)
1883 {
1884         struct devx_obj_event *obj_event;
1885         struct devx_event *event;
1886         int err;
1887
1888         event = xa_load(&devx_event_table->event_xa, key_level1);
1889         if (!event) {
1890                 event = kzalloc(sizeof(*event), GFP_KERNEL);
1891                 if (!event)
1892                         return -ENOMEM;
1893
1894                 INIT_LIST_HEAD(&event->unaffiliated_list);
1895                 xa_init(&event->object_ids);
1896
1897                 err = xa_insert(&devx_event_table->event_xa,
1898                                 key_level1,
1899                                 event,
1900                                 GFP_KERNEL);
1901                 if (err) {
1902                         kfree(event);
1903                         return err;
1904                 }
1905         }
1906
1907         if (!is_level2)
1908                 return 0;
1909
1910         obj_event = xa_load(&event->object_ids, key_level2);
1911         if (!obj_event) {
1912                 obj_event = kzalloc(sizeof(*obj_event), GFP_KERNEL);
1913                 if (!obj_event)
1914                         /* Level1 is valid for future use, no need to free */
1915                         return -ENOMEM;
1916
1917                 err = xa_insert(&event->object_ids,
1918                                 key_level2,
1919                                 obj_event,
1920                                 GFP_KERNEL);
1921                 if (err) {
1922                         kfree(obj_event);
1923                         return err;
1924                 }
1925                 INIT_LIST_HEAD(&obj_event->obj_sub_list);
1926         }
1927
1928         return 0;
1929 }
1930
1931 static bool is_valid_events_legacy(int num_events, u16 *event_type_num_list,
1932                                    struct devx_obj *obj)
1933 {
1934         int i;
1935
1936         for (i = 0; i < num_events; i++) {
1937                 if (obj) {
1938                         if (!is_legacy_obj_event_num(event_type_num_list[i]))
1939                                 return false;
1940                 } else if (!is_legacy_unaffiliated_event_num(
1941                                 event_type_num_list[i])) {
1942                         return false;
1943                 }
1944         }
1945
1946         return true;
1947 }
1948
1949 #define MAX_SUPP_EVENT_NUM 255
1950 static bool is_valid_events(struct mlx5_core_dev *dev,
1951                             int num_events, u16 *event_type_num_list,
1952                             struct devx_obj *obj)
1953 {
1954         __be64 *aff_events;
1955         __be64 *unaff_events;
1956         int mask_entry;
1957         int mask_bit;
1958         int i;
1959
1960         if (MLX5_CAP_GEN(dev, event_cap)) {
1961                 aff_events = MLX5_CAP_DEV_EVENT(dev,
1962                                                 user_affiliated_events);
1963                 unaff_events = MLX5_CAP_DEV_EVENT(dev,
1964                                                   user_unaffiliated_events);
1965         } else {
1966                 return is_valid_events_legacy(num_events, event_type_num_list,
1967                                               obj);
1968         }
1969
1970         for (i = 0; i < num_events; i++) {
1971                 if (event_type_num_list[i] > MAX_SUPP_EVENT_NUM)
1972                         return false;
1973
1974                 mask_entry = event_type_num_list[i] / 64;
1975                 mask_bit = event_type_num_list[i] % 64;
1976
1977                 if (obj) {
1978                         /* CQ completion */
1979                         if (event_type_num_list[i] == 0)
1980                                 continue;
1981
1982                         if (!(be64_to_cpu(aff_events[mask_entry]) &
1983                                         (1ull << mask_bit)))
1984                                 return false;
1985
1986                         continue;
1987                 }
1988
1989                 if (!(be64_to_cpu(unaff_events[mask_entry]) &
1990                                 (1ull << mask_bit)))
1991                         return false;
1992         }
1993
1994         return true;
1995 }
1996
1997 #define MAX_NUM_EVENTS 16
1998 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT)(
1999         struct uverbs_attr_bundle *attrs)
2000 {
2001         struct ib_uobject *devx_uobj = uverbs_attr_get_uobject(
2002                                 attrs,
2003                                 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_OBJ_HANDLE);
2004         struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
2005                 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
2006         struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
2007         struct ib_uobject *fd_uobj;
2008         struct devx_obj *obj = NULL;
2009         struct devx_async_event_file *ev_file;
2010         struct mlx5_devx_event_table *devx_event_table = &dev->devx_event_table;
2011         u16 *event_type_num_list;
2012         struct devx_event_subscription *event_sub, *tmp_sub;
2013         struct list_head sub_list;
2014         int redirect_fd;
2015         bool use_eventfd = false;
2016         int num_events;
2017         u16 obj_type = 0;
2018         u64 cookie = 0;
2019         u32 obj_id = 0;
2020         int err;
2021         int i;
2022
2023         if (!c->devx_uid)
2024                 return -EINVAL;
2025
2026         if (!IS_ERR(devx_uobj)) {
2027                 obj = (struct devx_obj *)devx_uobj->object;
2028                 if (obj)
2029                         obj_id = get_dec_obj_id(obj->obj_id);
2030         }
2031
2032         fd_uobj = uverbs_attr_get_uobject(attrs,
2033                                 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_HANDLE);
2034         if (IS_ERR(fd_uobj))
2035                 return PTR_ERR(fd_uobj);
2036
2037         ev_file = container_of(fd_uobj, struct devx_async_event_file,
2038                                uobj);
2039
2040         if (uverbs_attr_is_valid(attrs,
2041                                  MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_NUM)) {
2042                 err = uverbs_copy_from(&redirect_fd, attrs,
2043                                MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_NUM);
2044                 if (err)
2045                         return err;
2046
2047                 use_eventfd = true;
2048         }
2049
2050         if (uverbs_attr_is_valid(attrs,
2051                                  MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_COOKIE)) {
2052                 if (use_eventfd)
2053                         return -EINVAL;
2054
2055                 err = uverbs_copy_from(&cookie, attrs,
2056                                 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_COOKIE);
2057                 if (err)
2058                         return err;
2059         }
2060
2061         num_events = uverbs_attr_ptr_get_array_size(
2062                 attrs, MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_TYPE_NUM_LIST,
2063                 sizeof(u16));
2064
2065         if (num_events < 0)
2066                 return num_events;
2067
2068         if (num_events > MAX_NUM_EVENTS)
2069                 return -EINVAL;
2070
2071         event_type_num_list = uverbs_attr_get_alloced_ptr(attrs,
2072                         MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_TYPE_NUM_LIST);
2073
2074         if (!is_valid_events(dev->mdev, num_events, event_type_num_list, obj))
2075                 return -EINVAL;
2076
2077         INIT_LIST_HEAD(&sub_list);
2078
2079         /* Protect from concurrent subscriptions to same XA entries to allow
2080          * both to succeed
2081          */
2082         mutex_lock(&devx_event_table->event_xa_lock);
2083         for (i = 0; i < num_events; i++) {
2084                 u32 key_level1;
2085
2086                 if (obj)
2087                         obj_type = get_dec_obj_type(obj,
2088                                                     event_type_num_list[i]);
2089                 key_level1 = event_type_num_list[i] | obj_type << 16;
2090
2091                 err = subscribe_event_xa_alloc(devx_event_table,
2092                                                key_level1,
2093                                                obj,
2094                                                obj_id);
2095                 if (err)
2096                         goto err;
2097
2098                 event_sub = kzalloc(sizeof(*event_sub), GFP_KERNEL);
2099                 if (!event_sub) {
2100                         err = -ENOMEM;
2101                         goto err;
2102                 }
2103
2104                 list_add_tail(&event_sub->event_list, &sub_list);
2105                 uverbs_uobject_get(&ev_file->uobj);
2106                 if (use_eventfd) {
2107                         event_sub->eventfd =
2108                                 eventfd_ctx_fdget(redirect_fd);
2109
2110                         if (IS_ERR(event_sub->eventfd)) {
2111                                 err = PTR_ERR(event_sub->eventfd);
2112                                 event_sub->eventfd = NULL;
2113                                 goto err;
2114                         }
2115                 }
2116
2117                 event_sub->cookie = cookie;
2118                 event_sub->ev_file = ev_file;
2119                 /* May be needed upon cleanup the devx object/subscription */
2120                 event_sub->xa_key_level1 = key_level1;
2121                 event_sub->xa_key_level2 = obj_id;
2122                 INIT_LIST_HEAD(&event_sub->obj_list);
2123         }
2124
2125         /* Once all the allocations and the XA data insertions were done we
2126          * can go ahead and add all the subscriptions to the relevant lists
2127          * without concern of a failure.
2128          */
2129         list_for_each_entry_safe(event_sub, tmp_sub, &sub_list, event_list) {
2130                 struct devx_event *event;
2131                 struct devx_obj_event *obj_event;
2132
2133                 list_del_init(&event_sub->event_list);
2134
2135                 spin_lock_irq(&ev_file->lock);
2136                 list_add_tail_rcu(&event_sub->file_list,
2137                                   &ev_file->subscribed_events_list);
2138                 spin_unlock_irq(&ev_file->lock);
2139
2140                 event = xa_load(&devx_event_table->event_xa,
2141                                 event_sub->xa_key_level1);
2142                 WARN_ON(!event);
2143
2144                 if (!obj) {
2145                         list_add_tail_rcu(&event_sub->xa_list,
2146                                           &event->unaffiliated_list);
2147                         continue;
2148                 }
2149
2150                 obj_event = xa_load(&event->object_ids, obj_id);
2151                 WARN_ON(!obj_event);
2152                 list_add_tail_rcu(&event_sub->xa_list,
2153                                   &obj_event->obj_sub_list);
2154                 list_add_tail_rcu(&event_sub->obj_list,
2155                                   &obj->event_sub);
2156         }
2157
2158         mutex_unlock(&devx_event_table->event_xa_lock);
2159         return 0;
2160
2161 err:
2162         list_for_each_entry_safe(event_sub, tmp_sub, &sub_list, event_list) {
2163                 list_del(&event_sub->event_list);
2164
2165                 subscribe_event_xa_dealloc(devx_event_table,
2166                                            event_sub->xa_key_level1,
2167                                            obj,
2168                                            obj_id);
2169
2170                 if (event_sub->eventfd)
2171                         eventfd_ctx_put(event_sub->eventfd);
2172                 uverbs_uobject_put(&event_sub->ev_file->uobj);
2173                 kfree(event_sub);
2174         }
2175
2176         mutex_unlock(&devx_event_table->event_xa_lock);
2177         return err;
2178 }
2179
2180 static int devx_umem_get(struct mlx5_ib_dev *dev, struct ib_ucontext *ucontext,
2181                          struct uverbs_attr_bundle *attrs,
2182                          struct devx_umem *obj, u32 access_flags)
2183 {
2184         u64 addr;
2185         size_t size;
2186         int err;
2187
2188         if (uverbs_copy_from(&addr, attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_ADDR) ||
2189             uverbs_copy_from(&size, attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_LEN))
2190                 return -EFAULT;
2191
2192         err = ib_check_mr_access(&dev->ib_dev, access_flags);
2193         if (err)
2194                 return err;
2195
2196         if (uverbs_attr_is_valid(attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_DMABUF_FD)) {
2197                 struct ib_umem_dmabuf *umem_dmabuf;
2198                 int dmabuf_fd;
2199
2200                 err = uverbs_get_raw_fd(&dmabuf_fd, attrs,
2201                                         MLX5_IB_ATTR_DEVX_UMEM_REG_DMABUF_FD);
2202                 if (err)
2203                         return -EFAULT;
2204
2205                 umem_dmabuf = ib_umem_dmabuf_get_pinned(
2206                         &dev->ib_dev, addr, size, dmabuf_fd, access_flags);
2207                 if (IS_ERR(umem_dmabuf))
2208                         return PTR_ERR(umem_dmabuf);
2209                 obj->umem = &umem_dmabuf->umem;
2210         } else {
2211                 obj->umem = ib_umem_get(&dev->ib_dev, addr, size, access_flags);
2212                 if (IS_ERR(obj->umem))
2213                         return PTR_ERR(obj->umem);
2214         }
2215         return 0;
2216 }
2217
2218 static unsigned int devx_umem_find_best_pgsize(struct ib_umem *umem,
2219                                                unsigned long pgsz_bitmap)
2220 {
2221         unsigned long page_size;
2222
2223         /* Don't bother checking larger page sizes as offset must be zero and
2224          * total DEVX umem length must be equal to total umem length.
2225          */
2226         pgsz_bitmap &= GENMASK_ULL(max_t(u64, order_base_2(umem->length),
2227                                          PAGE_SHIFT),
2228                                    MLX5_ADAPTER_PAGE_SHIFT);
2229         if (!pgsz_bitmap)
2230                 return 0;
2231
2232         page_size = ib_umem_find_best_pgoff(umem, pgsz_bitmap, U64_MAX);
2233         if (!page_size)
2234                 return 0;
2235
2236         /* If the page_size is less than the CPU page size then we can use the
2237          * offset and create a umem which is a subset of the page list.
2238          * For larger page sizes we can't be sure the DMA  list reflects the
2239          * VA so we must ensure that the umem extent is exactly equal to the
2240          * page list. Reduce the page size until one of these cases is true.
2241          */
2242         while ((ib_umem_dma_offset(umem, page_size) != 0 ||
2243                 (umem->length % page_size) != 0) &&
2244                 page_size > PAGE_SIZE)
2245                 page_size /= 2;
2246
2247         return page_size;
2248 }
2249
2250 static int devx_umem_reg_cmd_alloc(struct mlx5_ib_dev *dev,
2251                                    struct uverbs_attr_bundle *attrs,
2252                                    struct devx_umem *obj,
2253                                    struct devx_umem_reg_cmd *cmd,
2254                                    int access)
2255 {
2256         unsigned long pgsz_bitmap;
2257         unsigned int page_size;
2258         __be64 *mtt;
2259         void *umem;
2260         int ret;
2261
2262         /*
2263          * If the user does not pass in pgsz_bitmap then the user promises not
2264          * to use umem_offset!=0 in any commands that allocate on top of the
2265          * umem.
2266          *
2267          * If the user wants to use a umem_offset then it must pass in
2268          * pgsz_bitmap which guides the maximum page size and thus maximum
2269          * object alignment inside the umem. See the PRM.
2270          *
2271          * Users are not allowed to use IOVA here, mkeys are not supported on
2272          * umem.
2273          */
2274         ret = uverbs_get_const_default(&pgsz_bitmap, attrs,
2275                         MLX5_IB_ATTR_DEVX_UMEM_REG_PGSZ_BITMAP,
2276                         GENMASK_ULL(63,
2277                                     min(PAGE_SHIFT, MLX5_ADAPTER_PAGE_SHIFT)));
2278         if (ret)
2279                 return ret;
2280
2281         page_size = devx_umem_find_best_pgsize(obj->umem, pgsz_bitmap);
2282         if (!page_size)
2283                 return -EINVAL;
2284
2285         cmd->inlen = MLX5_ST_SZ_BYTES(create_umem_in) +
2286                      (MLX5_ST_SZ_BYTES(mtt) *
2287                       ib_umem_num_dma_blocks(obj->umem, page_size));
2288         cmd->in = uverbs_zalloc(attrs, cmd->inlen);
2289         if (IS_ERR(cmd->in))
2290                 return PTR_ERR(cmd->in);
2291
2292         umem = MLX5_ADDR_OF(create_umem_in, cmd->in, umem);
2293         mtt = (__be64 *)MLX5_ADDR_OF(umem, umem, mtt);
2294
2295         MLX5_SET(create_umem_in, cmd->in, opcode, MLX5_CMD_OP_CREATE_UMEM);
2296         MLX5_SET64(umem, umem, num_of_mtt,
2297                    ib_umem_num_dma_blocks(obj->umem, page_size));
2298         MLX5_SET(umem, umem, log_page_size,
2299                  order_base_2(page_size) - MLX5_ADAPTER_PAGE_SHIFT);
2300         MLX5_SET(umem, umem, page_offset,
2301                  ib_umem_dma_offset(obj->umem, page_size));
2302
2303         if (mlx5_umem_needs_ats(dev, obj->umem, access))
2304                 MLX5_SET(umem, umem, ats, 1);
2305
2306         mlx5_ib_populate_pas(obj->umem, page_size, mtt,
2307                              (obj->umem->writable ? MLX5_IB_MTT_WRITE : 0) |
2308                                      MLX5_IB_MTT_READ);
2309         return 0;
2310 }
2311
2312 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_UMEM_REG)(
2313         struct uverbs_attr_bundle *attrs)
2314 {
2315         struct devx_umem_reg_cmd cmd;
2316         struct devx_umem *obj;
2317         struct ib_uobject *uobj = uverbs_attr_get_uobject(
2318                 attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE);
2319         u32 obj_id;
2320         struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
2321                 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
2322         struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
2323         int access_flags;
2324         int err;
2325
2326         if (!c->devx_uid)
2327                 return -EINVAL;
2328
2329         err = uverbs_get_flags32(&access_flags, attrs,
2330                                  MLX5_IB_ATTR_DEVX_UMEM_REG_ACCESS,
2331                                  IB_ACCESS_LOCAL_WRITE |
2332                                  IB_ACCESS_REMOTE_WRITE |
2333                                  IB_ACCESS_REMOTE_READ |
2334                                  IB_ACCESS_RELAXED_ORDERING);
2335         if (err)
2336                 return err;
2337
2338         obj = kzalloc(sizeof(struct devx_umem), GFP_KERNEL);
2339         if (!obj)
2340                 return -ENOMEM;
2341
2342         err = devx_umem_get(dev, &c->ibucontext, attrs, obj, access_flags);
2343         if (err)
2344                 goto err_obj_free;
2345
2346         err = devx_umem_reg_cmd_alloc(dev, attrs, obj, &cmd, access_flags);
2347         if (err)
2348                 goto err_umem_release;
2349
2350         MLX5_SET(create_umem_in, cmd.in, uid, c->devx_uid);
2351         err = mlx5_cmd_exec(dev->mdev, cmd.in, cmd.inlen, cmd.out,
2352                             sizeof(cmd.out));
2353         if (err)
2354                 goto err_umem_release;
2355
2356         obj->mdev = dev->mdev;
2357         uobj->object = obj;
2358         devx_obj_build_destroy_cmd(cmd.in, cmd.out, obj->dinbox, &obj->dinlen, &obj_id);
2359         uverbs_finalize_uobj_create(attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE);
2360
2361         err = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_OUT_ID, &obj_id,
2362                              sizeof(obj_id));
2363         return err;
2364
2365 err_umem_release:
2366         ib_umem_release(obj->umem);
2367 err_obj_free:
2368         kfree(obj);
2369         return err;
2370 }
2371
2372 static int devx_umem_cleanup(struct ib_uobject *uobject,
2373                              enum rdma_remove_reason why,
2374                              struct uverbs_attr_bundle *attrs)
2375 {
2376         struct devx_umem *obj = uobject->object;
2377         u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
2378         int err;
2379
2380         err = mlx5_cmd_exec(obj->mdev, obj->dinbox, obj->dinlen, out, sizeof(out));
2381         if (err)
2382                 return err;
2383
2384         ib_umem_release(obj->umem);
2385         kfree(obj);
2386         return 0;
2387 }
2388
2389 static bool is_unaffiliated_event(struct mlx5_core_dev *dev,
2390                                   unsigned long event_type)
2391 {
2392         __be64 *unaff_events;
2393         int mask_entry;
2394         int mask_bit;
2395
2396         if (!MLX5_CAP_GEN(dev, event_cap))
2397                 return is_legacy_unaffiliated_event_num(event_type);
2398
2399         unaff_events = MLX5_CAP_DEV_EVENT(dev,
2400                                           user_unaffiliated_events);
2401         WARN_ON(event_type > MAX_SUPP_EVENT_NUM);
2402
2403         mask_entry = event_type / 64;
2404         mask_bit = event_type % 64;
2405
2406         if (!(be64_to_cpu(unaff_events[mask_entry]) & (1ull << mask_bit)))
2407                 return false;
2408
2409         return true;
2410 }
2411
2412 static u32 devx_get_obj_id_from_event(unsigned long event_type, void *data)
2413 {
2414         struct mlx5_eqe *eqe = data;
2415         u32 obj_id = 0;
2416
2417         switch (event_type) {
2418         case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR:
2419         case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT:
2420         case MLX5_EVENT_TYPE_PATH_MIG:
2421         case MLX5_EVENT_TYPE_COMM_EST:
2422         case MLX5_EVENT_TYPE_SQ_DRAINED:
2423         case MLX5_EVENT_TYPE_SRQ_LAST_WQE:
2424         case MLX5_EVENT_TYPE_WQ_CATAS_ERROR:
2425         case MLX5_EVENT_TYPE_PATH_MIG_FAILED:
2426         case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
2427         case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR:
2428                 obj_id = be32_to_cpu(eqe->data.qp_srq.qp_srq_n) & 0xffffff;
2429                 break;
2430         case MLX5_EVENT_TYPE_XRQ_ERROR:
2431                 obj_id = be32_to_cpu(eqe->data.xrq_err.type_xrqn) & 0xffffff;
2432                 break;
2433         case MLX5_EVENT_TYPE_DCT_DRAINED:
2434         case MLX5_EVENT_TYPE_DCT_KEY_VIOLATION:
2435                 obj_id = be32_to_cpu(eqe->data.dct.dctn) & 0xffffff;
2436                 break;
2437         case MLX5_EVENT_TYPE_CQ_ERROR:
2438                 obj_id = be32_to_cpu(eqe->data.cq_err.cqn) & 0xffffff;
2439                 break;
2440         default:
2441                 obj_id = MLX5_GET(affiliated_event_header, &eqe->data, obj_id);
2442                 break;
2443         }
2444
2445         return obj_id;
2446 }
2447
2448 static int deliver_event(struct devx_event_subscription *event_sub,
2449                          const void *data)
2450 {
2451         struct devx_async_event_file *ev_file;
2452         struct devx_async_event_data *event_data;
2453         unsigned long flags;
2454
2455         ev_file = event_sub->ev_file;
2456
2457         if (ev_file->omit_data) {
2458                 spin_lock_irqsave(&ev_file->lock, flags);
2459                 if (!list_empty(&event_sub->event_list) ||
2460                     ev_file->is_destroyed) {
2461                         spin_unlock_irqrestore(&ev_file->lock, flags);
2462                         return 0;
2463                 }
2464
2465                 list_add_tail(&event_sub->event_list, &ev_file->event_list);
2466                 spin_unlock_irqrestore(&ev_file->lock, flags);
2467                 wake_up_interruptible(&ev_file->poll_wait);
2468                 return 0;
2469         }
2470
2471         event_data = kzalloc(sizeof(*event_data) + sizeof(struct mlx5_eqe),
2472                              GFP_ATOMIC);
2473         if (!event_data) {
2474                 spin_lock_irqsave(&ev_file->lock, flags);
2475                 ev_file->is_overflow_err = 1;
2476                 spin_unlock_irqrestore(&ev_file->lock, flags);
2477                 return -ENOMEM;
2478         }
2479
2480         event_data->hdr.cookie = event_sub->cookie;
2481         memcpy(event_data->hdr.out_data, data, sizeof(struct mlx5_eqe));
2482
2483         spin_lock_irqsave(&ev_file->lock, flags);
2484         if (!ev_file->is_destroyed)
2485                 list_add_tail(&event_data->list, &ev_file->event_list);
2486         else
2487                 kfree(event_data);
2488         spin_unlock_irqrestore(&ev_file->lock, flags);
2489         wake_up_interruptible(&ev_file->poll_wait);
2490
2491         return 0;
2492 }
2493
2494 static void dispatch_event_fd(struct list_head *fd_list,
2495                               const void *data)
2496 {
2497         struct devx_event_subscription *item;
2498
2499         list_for_each_entry_rcu(item, fd_list, xa_list) {
2500                 if (item->eventfd)
2501                         eventfd_signal(item->eventfd);
2502                 else
2503                         deliver_event(item, data);
2504         }
2505 }
2506
2507 static int devx_event_notifier(struct notifier_block *nb,
2508                                unsigned long event_type, void *data)
2509 {
2510         struct mlx5_devx_event_table *table;
2511         struct mlx5_ib_dev *dev;
2512         struct devx_event *event;
2513         struct devx_obj_event *obj_event;
2514         u16 obj_type = 0;
2515         bool is_unaffiliated;
2516         u32 obj_id;
2517
2518         /* Explicit filtering to kernel events which may occur frequently */
2519         if (event_type == MLX5_EVENT_TYPE_CMD ||
2520             event_type == MLX5_EVENT_TYPE_PAGE_REQUEST)
2521                 return NOTIFY_OK;
2522
2523         table = container_of(nb, struct mlx5_devx_event_table, devx_nb.nb);
2524         dev = container_of(table, struct mlx5_ib_dev, devx_event_table);
2525         is_unaffiliated = is_unaffiliated_event(dev->mdev, event_type);
2526
2527         if (!is_unaffiliated)
2528                 obj_type = get_event_obj_type(event_type, data);
2529
2530         rcu_read_lock();
2531         event = xa_load(&table->event_xa, event_type | (obj_type << 16));
2532         if (!event) {
2533                 rcu_read_unlock();
2534                 return NOTIFY_DONE;
2535         }
2536
2537         if (is_unaffiliated) {
2538                 dispatch_event_fd(&event->unaffiliated_list, data);
2539                 rcu_read_unlock();
2540                 return NOTIFY_OK;
2541         }
2542
2543         obj_id = devx_get_obj_id_from_event(event_type, data);
2544         obj_event = xa_load(&event->object_ids, obj_id);
2545         if (!obj_event) {
2546                 rcu_read_unlock();
2547                 return NOTIFY_DONE;
2548         }
2549
2550         dispatch_event_fd(&obj_event->obj_sub_list, data);
2551
2552         rcu_read_unlock();
2553         return NOTIFY_OK;
2554 }
2555
2556 int mlx5_ib_devx_init(struct mlx5_ib_dev *dev)
2557 {
2558         struct mlx5_devx_event_table *table = &dev->devx_event_table;
2559         int uid;
2560
2561         uid = mlx5_ib_devx_create(dev, false);
2562         if (uid > 0) {
2563                 dev->devx_whitelist_uid = uid;
2564                 xa_init(&table->event_xa);
2565                 mutex_init(&table->event_xa_lock);
2566                 MLX5_NB_INIT(&table->devx_nb, devx_event_notifier, NOTIFY_ANY);
2567                 mlx5_eq_notifier_register(dev->mdev, &table->devx_nb);
2568         }
2569
2570         return 0;
2571 }
2572
2573 void mlx5_ib_devx_cleanup(struct mlx5_ib_dev *dev)
2574 {
2575         struct mlx5_devx_event_table *table = &dev->devx_event_table;
2576         struct devx_event_subscription *sub, *tmp;
2577         struct devx_event *event;
2578         void *entry;
2579         unsigned long id;
2580
2581         if (dev->devx_whitelist_uid) {
2582                 mlx5_eq_notifier_unregister(dev->mdev, &table->devx_nb);
2583                 mutex_lock(&dev->devx_event_table.event_xa_lock);
2584                 xa_for_each(&table->event_xa, id, entry) {
2585                         event = entry;
2586                         list_for_each_entry_safe(
2587                                 sub, tmp, &event->unaffiliated_list, xa_list)
2588                                 devx_cleanup_subscription(dev, sub);
2589                         kfree(entry);
2590                 }
2591                 mutex_unlock(&dev->devx_event_table.event_xa_lock);
2592                 xa_destroy(&table->event_xa);
2593
2594                 mlx5_ib_devx_destroy(dev, dev->devx_whitelist_uid);
2595         }
2596 }
2597
2598 static ssize_t devx_async_cmd_event_read(struct file *filp, char __user *buf,
2599                                          size_t count, loff_t *pos)
2600 {
2601         struct devx_async_cmd_event_file *comp_ev_file = filp->private_data;
2602         struct devx_async_event_queue *ev_queue = &comp_ev_file->ev_queue;
2603         struct devx_async_data *event;
2604         int ret = 0;
2605         size_t eventsz;
2606
2607         spin_lock_irq(&ev_queue->lock);
2608
2609         while (list_empty(&ev_queue->event_list)) {
2610                 spin_unlock_irq(&ev_queue->lock);
2611
2612                 if (filp->f_flags & O_NONBLOCK)
2613                         return -EAGAIN;
2614
2615                 if (wait_event_interruptible(
2616                             ev_queue->poll_wait,
2617                             (!list_empty(&ev_queue->event_list) ||
2618                              ev_queue->is_destroyed))) {
2619                         return -ERESTARTSYS;
2620                 }
2621
2622                 spin_lock_irq(&ev_queue->lock);
2623                 if (ev_queue->is_destroyed) {
2624                         spin_unlock_irq(&ev_queue->lock);
2625                         return -EIO;
2626                 }
2627         }
2628
2629         event = list_entry(ev_queue->event_list.next,
2630                            struct devx_async_data, list);
2631         eventsz = event->cmd_out_len +
2632                         sizeof(struct mlx5_ib_uapi_devx_async_cmd_hdr);
2633
2634         if (eventsz > count) {
2635                 spin_unlock_irq(&ev_queue->lock);
2636                 return -ENOSPC;
2637         }
2638
2639         list_del(ev_queue->event_list.next);
2640         spin_unlock_irq(&ev_queue->lock);
2641
2642         if (copy_to_user(buf, &event->hdr, eventsz))
2643                 ret = -EFAULT;
2644         else
2645                 ret = eventsz;
2646
2647         atomic_sub(event->cmd_out_len, &ev_queue->bytes_in_use);
2648         kvfree(event);
2649         return ret;
2650 }
2651
2652 static __poll_t devx_async_cmd_event_poll(struct file *filp,
2653                                               struct poll_table_struct *wait)
2654 {
2655         struct devx_async_cmd_event_file *comp_ev_file = filp->private_data;
2656         struct devx_async_event_queue *ev_queue = &comp_ev_file->ev_queue;
2657         __poll_t pollflags = 0;
2658
2659         poll_wait(filp, &ev_queue->poll_wait, wait);
2660
2661         spin_lock_irq(&ev_queue->lock);
2662         if (ev_queue->is_destroyed)
2663                 pollflags = EPOLLIN | EPOLLRDNORM | EPOLLRDHUP;
2664         else if (!list_empty(&ev_queue->event_list))
2665                 pollflags = EPOLLIN | EPOLLRDNORM;
2666         spin_unlock_irq(&ev_queue->lock);
2667
2668         return pollflags;
2669 }
2670
2671 static const struct file_operations devx_async_cmd_event_fops = {
2672         .owner   = THIS_MODULE,
2673         .read    = devx_async_cmd_event_read,
2674         .poll    = devx_async_cmd_event_poll,
2675         .release = uverbs_uobject_fd_release,
2676         .llseek  = no_llseek,
2677 };
2678
2679 static ssize_t devx_async_event_read(struct file *filp, char __user *buf,
2680                                      size_t count, loff_t *pos)
2681 {
2682         struct devx_async_event_file *ev_file = filp->private_data;
2683         struct devx_event_subscription *event_sub;
2684         struct devx_async_event_data *event;
2685         int ret = 0;
2686         size_t eventsz;
2687         bool omit_data;
2688         void *event_data;
2689
2690         omit_data = ev_file->omit_data;
2691
2692         spin_lock_irq(&ev_file->lock);
2693
2694         if (ev_file->is_overflow_err) {
2695                 ev_file->is_overflow_err = 0;
2696                 spin_unlock_irq(&ev_file->lock);
2697                 return -EOVERFLOW;
2698         }
2699
2700
2701         while (list_empty(&ev_file->event_list)) {
2702                 spin_unlock_irq(&ev_file->lock);
2703
2704                 if (filp->f_flags & O_NONBLOCK)
2705                         return -EAGAIN;
2706
2707                 if (wait_event_interruptible(ev_file->poll_wait,
2708                             (!list_empty(&ev_file->event_list) ||
2709                              ev_file->is_destroyed))) {
2710                         return -ERESTARTSYS;
2711                 }
2712
2713                 spin_lock_irq(&ev_file->lock);
2714                 if (ev_file->is_destroyed) {
2715                         spin_unlock_irq(&ev_file->lock);
2716                         return -EIO;
2717                 }
2718         }
2719
2720         if (omit_data) {
2721                 event_sub = list_first_entry(&ev_file->event_list,
2722                                         struct devx_event_subscription,
2723                                         event_list);
2724                 eventsz = sizeof(event_sub->cookie);
2725                 event_data = &event_sub->cookie;
2726         } else {
2727                 event = list_first_entry(&ev_file->event_list,
2728                                       struct devx_async_event_data, list);
2729                 eventsz = sizeof(struct mlx5_eqe) +
2730                         sizeof(struct mlx5_ib_uapi_devx_async_event_hdr);
2731                 event_data = &event->hdr;
2732         }
2733
2734         if (eventsz > count) {
2735                 spin_unlock_irq(&ev_file->lock);
2736                 return -EINVAL;
2737         }
2738
2739         if (omit_data)
2740                 list_del_init(&event_sub->event_list);
2741         else
2742                 list_del(&event->list);
2743
2744         spin_unlock_irq(&ev_file->lock);
2745
2746         if (copy_to_user(buf, event_data, eventsz))
2747                 /* This points to an application issue, not a kernel concern */
2748                 ret = -EFAULT;
2749         else
2750                 ret = eventsz;
2751
2752         if (!omit_data)
2753                 kfree(event);
2754         return ret;
2755 }
2756
2757 static __poll_t devx_async_event_poll(struct file *filp,
2758                                       struct poll_table_struct *wait)
2759 {
2760         struct devx_async_event_file *ev_file = filp->private_data;
2761         __poll_t pollflags = 0;
2762
2763         poll_wait(filp, &ev_file->poll_wait, wait);
2764
2765         spin_lock_irq(&ev_file->lock);
2766         if (ev_file->is_destroyed)
2767                 pollflags = EPOLLIN | EPOLLRDNORM | EPOLLRDHUP;
2768         else if (!list_empty(&ev_file->event_list))
2769                 pollflags = EPOLLIN | EPOLLRDNORM;
2770         spin_unlock_irq(&ev_file->lock);
2771
2772         return pollflags;
2773 }
2774
2775 static void devx_free_subscription(struct rcu_head *rcu)
2776 {
2777         struct devx_event_subscription *event_sub =
2778                 container_of(rcu, struct devx_event_subscription, rcu);
2779
2780         if (event_sub->eventfd)
2781                 eventfd_ctx_put(event_sub->eventfd);
2782         uverbs_uobject_put(&event_sub->ev_file->uobj);
2783         kfree(event_sub);
2784 }
2785
2786 static const struct file_operations devx_async_event_fops = {
2787         .owner   = THIS_MODULE,
2788         .read    = devx_async_event_read,
2789         .poll    = devx_async_event_poll,
2790         .release = uverbs_uobject_fd_release,
2791         .llseek  = no_llseek,
2792 };
2793
2794 static void devx_async_cmd_event_destroy_uobj(struct ib_uobject *uobj,
2795                                               enum rdma_remove_reason why)
2796 {
2797         struct devx_async_cmd_event_file *comp_ev_file =
2798                 container_of(uobj, struct devx_async_cmd_event_file,
2799                              uobj);
2800         struct devx_async_event_queue *ev_queue = &comp_ev_file->ev_queue;
2801         struct devx_async_data *entry, *tmp;
2802
2803         spin_lock_irq(&ev_queue->lock);
2804         ev_queue->is_destroyed = 1;
2805         spin_unlock_irq(&ev_queue->lock);
2806         wake_up_interruptible(&ev_queue->poll_wait);
2807
2808         mlx5_cmd_cleanup_async_ctx(&comp_ev_file->async_ctx);
2809
2810         spin_lock_irq(&comp_ev_file->ev_queue.lock);
2811         list_for_each_entry_safe(entry, tmp,
2812                                  &comp_ev_file->ev_queue.event_list, list) {
2813                 list_del(&entry->list);
2814                 kvfree(entry);
2815         }
2816         spin_unlock_irq(&comp_ev_file->ev_queue.lock);
2817 };
2818
2819 static void devx_async_event_destroy_uobj(struct ib_uobject *uobj,
2820                                           enum rdma_remove_reason why)
2821 {
2822         struct devx_async_event_file *ev_file =
2823                 container_of(uobj, struct devx_async_event_file,
2824                              uobj);
2825         struct devx_event_subscription *event_sub, *event_sub_tmp;
2826         struct mlx5_ib_dev *dev = ev_file->dev;
2827
2828         spin_lock_irq(&ev_file->lock);
2829         ev_file->is_destroyed = 1;
2830
2831         /* free the pending events allocation */
2832         if (ev_file->omit_data) {
2833                 struct devx_event_subscription *event_sub, *tmp;
2834
2835                 list_for_each_entry_safe(event_sub, tmp, &ev_file->event_list,
2836                                          event_list)
2837                         list_del_init(&event_sub->event_list);
2838
2839         } else {
2840                 struct devx_async_event_data *entry, *tmp;
2841
2842                 list_for_each_entry_safe(entry, tmp, &ev_file->event_list,
2843                                          list) {
2844                         list_del(&entry->list);
2845                         kfree(entry);
2846                 }
2847         }
2848
2849         spin_unlock_irq(&ev_file->lock);
2850         wake_up_interruptible(&ev_file->poll_wait);
2851
2852         mutex_lock(&dev->devx_event_table.event_xa_lock);
2853         /* delete the subscriptions which are related to this FD */
2854         list_for_each_entry_safe(event_sub, event_sub_tmp,
2855                                  &ev_file->subscribed_events_list, file_list) {
2856                 devx_cleanup_subscription(dev, event_sub);
2857                 list_del_rcu(&event_sub->file_list);
2858                 /* subscription may not be used by the read API any more */
2859                 call_rcu(&event_sub->rcu, devx_free_subscription);
2860         }
2861         mutex_unlock(&dev->devx_event_table.event_xa_lock);
2862
2863         put_device(&dev->ib_dev.dev);
2864 };
2865
2866 DECLARE_UVERBS_NAMED_METHOD(
2867         MLX5_IB_METHOD_DEVX_UMEM_REG,
2868         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE,
2869                         MLX5_IB_OBJECT_DEVX_UMEM,
2870                         UVERBS_ACCESS_NEW,
2871                         UA_MANDATORY),
2872         UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_ADDR,
2873                            UVERBS_ATTR_TYPE(u64),
2874                            UA_MANDATORY),
2875         UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_LEN,
2876                            UVERBS_ATTR_TYPE(u64),
2877                            UA_MANDATORY),
2878         UVERBS_ATTR_RAW_FD(MLX5_IB_ATTR_DEVX_UMEM_REG_DMABUF_FD,
2879                            UA_OPTIONAL),
2880         UVERBS_ATTR_FLAGS_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_ACCESS,
2881                              enum ib_access_flags),
2882         UVERBS_ATTR_CONST_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_PGSZ_BITMAP,
2883                              u64),
2884         UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_DEVX_UMEM_REG_OUT_ID,
2885                             UVERBS_ATTR_TYPE(u32),
2886                             UA_MANDATORY));
2887
2888 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
2889         MLX5_IB_METHOD_DEVX_UMEM_DEREG,
2890         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_UMEM_DEREG_HANDLE,
2891                         MLX5_IB_OBJECT_DEVX_UMEM,
2892                         UVERBS_ACCESS_DESTROY,
2893                         UA_MANDATORY));
2894
2895 DECLARE_UVERBS_NAMED_METHOD(
2896         MLX5_IB_METHOD_DEVX_QUERY_EQN,
2897         UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_QUERY_EQN_USER_VEC,
2898                            UVERBS_ATTR_TYPE(u32),
2899                            UA_MANDATORY),
2900         UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_DEVX_QUERY_EQN_DEV_EQN,
2901                             UVERBS_ATTR_TYPE(u32),
2902                             UA_MANDATORY));
2903
2904 DECLARE_UVERBS_NAMED_METHOD(
2905         MLX5_IB_METHOD_DEVX_QUERY_UAR,
2906         UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_QUERY_UAR_USER_IDX,
2907                            UVERBS_ATTR_TYPE(u32),
2908                            UA_MANDATORY),
2909         UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_DEVX_QUERY_UAR_DEV_IDX,
2910                             UVERBS_ATTR_TYPE(u32),
2911                             UA_MANDATORY));
2912
2913 DECLARE_UVERBS_NAMED_METHOD(
2914         MLX5_IB_METHOD_DEVX_OTHER,
2915         UVERBS_ATTR_PTR_IN(
2916                 MLX5_IB_ATTR_DEVX_OTHER_CMD_IN,
2917                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2918                 UA_MANDATORY,
2919                 UA_ALLOC_AND_COPY),
2920         UVERBS_ATTR_PTR_OUT(
2921                 MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT,
2922                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
2923                 UA_MANDATORY));
2924
2925 DECLARE_UVERBS_NAMED_METHOD(
2926         MLX5_IB_METHOD_DEVX_OBJ_CREATE,
2927         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_CREATE_HANDLE,
2928                         MLX5_IB_OBJECT_DEVX_OBJ,
2929                         UVERBS_ACCESS_NEW,
2930                         UA_MANDATORY),
2931         UVERBS_ATTR_PTR_IN(
2932                 MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN,
2933                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2934                 UA_MANDATORY,
2935                 UA_ALLOC_AND_COPY),
2936         UVERBS_ATTR_PTR_OUT(
2937                 MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT,
2938                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
2939                 UA_MANDATORY));
2940
2941 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
2942         MLX5_IB_METHOD_DEVX_OBJ_DESTROY,
2943         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_DESTROY_HANDLE,
2944                         MLX5_IB_OBJECT_DEVX_OBJ,
2945                         UVERBS_ACCESS_DESTROY,
2946                         UA_MANDATORY));
2947
2948 DECLARE_UVERBS_NAMED_METHOD(
2949         MLX5_IB_METHOD_DEVX_OBJ_MODIFY,
2950         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_MODIFY_HANDLE,
2951                         UVERBS_IDR_ANY_OBJECT,
2952                         UVERBS_ACCESS_READ,
2953                         UA_MANDATORY),
2954         UVERBS_ATTR_PTR_IN(
2955                 MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN,
2956                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2957                 UA_MANDATORY,
2958                 UA_ALLOC_AND_COPY),
2959         UVERBS_ATTR_PTR_OUT(
2960                 MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT,
2961                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
2962                 UA_MANDATORY));
2963
2964 DECLARE_UVERBS_NAMED_METHOD(
2965         MLX5_IB_METHOD_DEVX_OBJ_QUERY,
2966         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_QUERY_HANDLE,
2967                         UVERBS_IDR_ANY_OBJECT,
2968                         UVERBS_ACCESS_READ,
2969                         UA_MANDATORY),
2970         UVERBS_ATTR_PTR_IN(
2971                 MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN,
2972                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2973                 UA_MANDATORY,
2974                 UA_ALLOC_AND_COPY),
2975         UVERBS_ATTR_PTR_OUT(
2976                 MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT,
2977                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
2978                 UA_MANDATORY));
2979
2980 DECLARE_UVERBS_NAMED_METHOD(
2981         MLX5_IB_METHOD_DEVX_OBJ_ASYNC_QUERY,
2982         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_QUERY_HANDLE,
2983                         UVERBS_IDR_ANY_OBJECT,
2984                         UVERBS_ACCESS_READ,
2985                         UA_MANDATORY),
2986         UVERBS_ATTR_PTR_IN(
2987                 MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN,
2988                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2989                 UA_MANDATORY,
2990                 UA_ALLOC_AND_COPY),
2991         UVERBS_ATTR_CONST_IN(MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_OUT_LEN,
2992                 u16, UA_MANDATORY),
2993         UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_FD,
2994                 MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
2995                 UVERBS_ACCESS_READ,
2996                 UA_MANDATORY),
2997         UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_WR_ID,
2998                 UVERBS_ATTR_TYPE(u64),
2999                 UA_MANDATORY));
3000
3001 DECLARE_UVERBS_NAMED_METHOD(
3002         MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT,
3003         UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_HANDLE,
3004                 MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
3005                 UVERBS_ACCESS_READ,
3006                 UA_MANDATORY),
3007         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_OBJ_HANDLE,
3008                 MLX5_IB_OBJECT_DEVX_OBJ,
3009                 UVERBS_ACCESS_READ,
3010                 UA_OPTIONAL),
3011         UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_TYPE_NUM_LIST,
3012                 UVERBS_ATTR_MIN_SIZE(sizeof(u16)),
3013                 UA_MANDATORY,
3014                 UA_ALLOC_AND_COPY),
3015         UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_COOKIE,
3016                 UVERBS_ATTR_TYPE(u64),
3017                 UA_OPTIONAL),
3018         UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_NUM,
3019                 UVERBS_ATTR_TYPE(u32),
3020                 UA_OPTIONAL));
3021
3022 DECLARE_UVERBS_GLOBAL_METHODS(MLX5_IB_OBJECT_DEVX,
3023                               &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OTHER),
3024                               &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_QUERY_UAR),
3025                               &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_QUERY_EQN),
3026                               &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT));
3027
3028 DECLARE_UVERBS_NAMED_OBJECT(MLX5_IB_OBJECT_DEVX_OBJ,
3029                             UVERBS_TYPE_ALLOC_IDR(devx_obj_cleanup),
3030                             &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_CREATE),
3031                             &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_DESTROY),
3032                             &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_MODIFY),
3033                             &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_QUERY),
3034                             &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_ASYNC_QUERY));
3035
3036 DECLARE_UVERBS_NAMED_OBJECT(MLX5_IB_OBJECT_DEVX_UMEM,
3037                             UVERBS_TYPE_ALLOC_IDR(devx_umem_cleanup),
3038                             &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_UMEM_REG),
3039                             &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_UMEM_DEREG));
3040
3041
3042 DECLARE_UVERBS_NAMED_METHOD(
3043         MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC,
3044         UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_ASYNC_CMD_FD_ALLOC_HANDLE,
3045                         MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
3046                         UVERBS_ACCESS_NEW,
3047                         UA_MANDATORY));
3048
3049 DECLARE_UVERBS_NAMED_OBJECT(
3050         MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
3051         UVERBS_TYPE_ALLOC_FD(sizeof(struct devx_async_cmd_event_file),
3052                              devx_async_cmd_event_destroy_uobj,
3053                              &devx_async_cmd_event_fops, "[devx_async_cmd]",
3054                              O_RDONLY),
3055         &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC));
3056
3057 DECLARE_UVERBS_NAMED_METHOD(
3058         MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC,
3059         UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_HANDLE,
3060                         MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
3061                         UVERBS_ACCESS_NEW,
3062                         UA_MANDATORY),
3063         UVERBS_ATTR_FLAGS_IN(MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_FLAGS,
3064                         enum mlx5_ib_uapi_devx_create_event_channel_flags,
3065                         UA_MANDATORY));
3066
3067 DECLARE_UVERBS_NAMED_OBJECT(
3068         MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
3069         UVERBS_TYPE_ALLOC_FD(sizeof(struct devx_async_event_file),
3070                              devx_async_event_destroy_uobj,
3071                              &devx_async_event_fops, "[devx_async_event]",
3072                              O_RDONLY),
3073         &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC));
3074
3075 static bool devx_is_supported(struct ib_device *device)
3076 {
3077         struct mlx5_ib_dev *dev = to_mdev(device);
3078
3079         return MLX5_CAP_GEN(dev->mdev, log_max_uctx);
3080 }
3081
3082 const struct uapi_definition mlx5_ib_devx_defs[] = {
3083         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
3084                 MLX5_IB_OBJECT_DEVX,
3085                 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
3086         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
3087                 MLX5_IB_OBJECT_DEVX_OBJ,
3088                 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
3089         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
3090                 MLX5_IB_OBJECT_DEVX_UMEM,
3091                 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
3092         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
3093                 MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
3094                 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
3095         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
3096                 MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
3097                 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
3098         {},
3099 };