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                 enum ib_qp_type qp_type = qp->ibqp.qp_type;
 634
 635                 if (qp_type == IB_QPT_RAW_PACKET ||
 636                     (qp->flags & IB_QP_CREATE_SOURCE_QPN)) {
 637                         struct mlx5_ib_raw_packet_qp *raw_packet_qp =
 638                                                          &qp->raw_packet_qp;
 639                         struct mlx5_ib_rq *rq = &raw_packet_qp->rq;
 640                         struct mlx5_ib_sq *sq = &raw_packet_qp->sq;
 641
 642                         return (get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ,
 643                                                rq->base.mqp.qpn) == obj_id ||
 644                                 get_enc_obj_id(MLX5_CMD_OP_CREATE_SQ,
 645                                                sq->base.mqp.qpn) == obj_id ||
 646                                 get_enc_obj_id(MLX5_CMD_OP_CREATE_TIR,
 647                                                rq->tirn) == obj_id ||
 648                                 get_enc_obj_id(MLX5_CMD_OP_CREATE_TIS,
 649                                                sq->tisn) == obj_id);
 650                 }
 651
 652                 if (qp_type == MLX5_IB_QPT_DCT)
 653                         return get_enc_obj_id(MLX5_CMD_OP_CREATE_DCT,
 654                                               qp->dct.mdct.mqp.qpn) == obj_id;
 655
 656                 return get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
 657                                       qp->ibqp.qp_num) == obj_id;
 658         }
 659
 660         case UVERBS_OBJECT_WQ:
 661                 return get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ,
 662                                       to_mrwq(uobj->object)->core_qp.qpn) ==
 663                                       obj_id;
 664
 665         case UVERBS_OBJECT_RWQ_IND_TBL:
 666                 return get_enc_obj_id(MLX5_CMD_OP_CREATE_RQT,
 667                                       to_mrwq_ind_table(uobj->object)->rqtn) ==
 668                                       obj_id;
 669
 670         case MLX5_IB_OBJECT_DEVX_OBJ:
 671                 return ((struct devx_obj *)uobj->object)->obj_id == obj_id;
 672
 673         default:
 674                 return false;
 675         }
 676 }
 677
 678 static void devx_set_umem_valid(const void *in)
 679 {
 680         u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
 681
 682         switch (opcode) {
 683         case MLX5_CMD_OP_CREATE_MKEY:
 684                 MLX5_SET(create_mkey_in, in, mkey_umem_valid, 1);
 685                 break;
 686         case MLX5_CMD_OP_CREATE_CQ:
 687         {
 688                 void *cqc;
 689
 690                 MLX5_SET(create_cq_in, in, cq_umem_valid, 1);
 691                 cqc = MLX5_ADDR_OF(create_cq_in, in, cq_context);
 692                 MLX5_SET(cqc, cqc, dbr_umem_valid, 1);
 693                 break;
 694         }
 695         case MLX5_CMD_OP_CREATE_QP:
 696         {
 697                 void *qpc;
 698
 699                 qpc = MLX5_ADDR_OF(create_qp_in, in, qpc);
 700                 MLX5_SET(qpc, qpc, dbr_umem_valid, 1);
 701                 MLX5_SET(create_qp_in, in, wq_umem_valid, 1);
 702                 break;
 703         }
 704
 705         case MLX5_CMD_OP_CREATE_RQ:
 706         {
 707                 void *rqc, *wq;
 708
 709                 rqc = MLX5_ADDR_OF(create_rq_in, in, ctx);
 710                 wq  = MLX5_ADDR_OF(rqc, rqc, wq);
 711                 MLX5_SET(wq, wq, dbr_umem_valid, 1);
 712                 MLX5_SET(wq, wq, wq_umem_valid, 1);
 713                 break;
 714         }
 715
 716         case MLX5_CMD_OP_CREATE_SQ:
 717         {
 718                 void *sqc, *wq;
 719
 720                 sqc = MLX5_ADDR_OF(create_sq_in, in, ctx);
 721                 wq = MLX5_ADDR_OF(sqc, sqc, wq);
 722                 MLX5_SET(wq, wq, dbr_umem_valid, 1);
 723                 MLX5_SET(wq, wq, wq_umem_valid, 1);
 724                 break;
 725         }
 726
 727         case MLX5_CMD_OP_MODIFY_CQ:
 728                 MLX5_SET(modify_cq_in, in, cq_umem_valid, 1);
 729                 break;
 730
 731         case MLX5_CMD_OP_CREATE_RMP:
 732         {
 733                 void *rmpc, *wq;
 734
 735                 rmpc = MLX5_ADDR_OF(create_rmp_in, in, ctx);
 736                 wq = MLX5_ADDR_OF(rmpc, rmpc, wq);
 737                 MLX5_SET(wq, wq, dbr_umem_valid, 1);
 738                 MLX5_SET(wq, wq, wq_umem_valid, 1);
 739                 break;
 740         }
 741
 742         case MLX5_CMD_OP_CREATE_XRQ:
 743         {
 744                 void *xrqc, *wq;
 745
 746                 xrqc = MLX5_ADDR_OF(create_xrq_in, in, xrq_context);
 747                 wq = MLX5_ADDR_OF(xrqc, xrqc, wq);
 748                 MLX5_SET(wq, wq, dbr_umem_valid, 1);
 749                 MLX5_SET(wq, wq, wq_umem_valid, 1);
 750                 break;
 751         }
 752
 753         case MLX5_CMD_OP_CREATE_XRC_SRQ:
 754         {
 755                 void *xrc_srqc;
 756
 757                 MLX5_SET(create_xrc_srq_in, in, xrc_srq_umem_valid, 1);
 758                 xrc_srqc = MLX5_ADDR_OF(create_xrc_srq_in, in,
 759                                         xrc_srq_context_entry);
 760                 MLX5_SET(xrc_srqc, xrc_srqc, dbr_umem_valid, 1);
 761                 break;
 762         }
 763
 764         default:
 765                 return;
 766         }
 767 }
 768
 769 static bool devx_is_obj_create_cmd(const void *in, u16 *opcode)
 770 {
 771         *opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
 772
 773         switch (*opcode) {
 774         case MLX5_CMD_OP_CREATE_GENERAL_OBJECT:
 775         case MLX5_CMD_OP_CREATE_MKEY:
 776         case MLX5_CMD_OP_CREATE_CQ:
 777         case MLX5_CMD_OP_ALLOC_PD:
 778         case MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN:
 779         case MLX5_CMD_OP_CREATE_RMP:
 780         case MLX5_CMD_OP_CREATE_SQ:
 781         case MLX5_CMD_OP_CREATE_RQ:
 782         case MLX5_CMD_OP_CREATE_RQT:
 783         case MLX5_CMD_OP_CREATE_TIR:
 784         case MLX5_CMD_OP_CREATE_TIS:
 785         case MLX5_CMD_OP_ALLOC_Q_COUNTER:
 786         case MLX5_CMD_OP_CREATE_FLOW_TABLE:
 787         case MLX5_CMD_OP_CREATE_FLOW_GROUP:
 788         case MLX5_CMD_OP_ALLOC_FLOW_COUNTER:
 789         case MLX5_CMD_OP_ALLOC_PACKET_REFORMAT_CONTEXT:
 790         case MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT:
 791         case MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT:
 792         case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
 793         case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
 794         case MLX5_CMD_OP_CREATE_QP:
 795         case MLX5_CMD_OP_CREATE_SRQ:
 796         case MLX5_CMD_OP_CREATE_XRC_SRQ:
 797         case MLX5_CMD_OP_CREATE_DCT:
 798         case MLX5_CMD_OP_CREATE_XRQ:
 799         case MLX5_CMD_OP_ATTACH_TO_MCG:
 800         case MLX5_CMD_OP_ALLOC_XRCD:
 801                 return true;
 802         case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
 803         {
 804                 u16 op_mod = MLX5_GET(set_fte_in, in, op_mod);
 805                 if (op_mod == 0)
 806                         return true;
 807                 return false;
 808         }
 809         case MLX5_CMD_OP_CREATE_PSV:
 810         {
 811                 u8 num_psv = MLX5_GET(create_psv_in, in, num_psv);
 812
 813                 if (num_psv == 1)
 814                         return true;
 815                 return false;
 816         }
 817         default:
 818                 return false;
 819         }
 820 }
 821
 822 static bool devx_is_obj_modify_cmd(const void *in)
 823 {
 824         u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
 825
 826         switch (opcode) {
 827         case MLX5_CMD_OP_MODIFY_GENERAL_OBJECT:
 828         case MLX5_CMD_OP_MODIFY_CQ:
 829         case MLX5_CMD_OP_MODIFY_RMP:
 830         case MLX5_CMD_OP_MODIFY_SQ:
 831         case MLX5_CMD_OP_MODIFY_RQ:
 832         case MLX5_CMD_OP_MODIFY_RQT:
 833         case MLX5_CMD_OP_MODIFY_TIR:
 834         case MLX5_CMD_OP_MODIFY_TIS:
 835         case MLX5_CMD_OP_MODIFY_FLOW_TABLE:
 836         case MLX5_CMD_OP_MODIFY_SCHEDULING_ELEMENT:
 837         case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
 838         case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
 839         case MLX5_CMD_OP_RST2INIT_QP:
 840         case MLX5_CMD_OP_INIT2RTR_QP:
 841         case MLX5_CMD_OP_INIT2INIT_QP:
 842         case MLX5_CMD_OP_RTR2RTS_QP:
 843         case MLX5_CMD_OP_RTS2RTS_QP:
 844         case MLX5_CMD_OP_SQERR2RTS_QP:
 845         case MLX5_CMD_OP_2ERR_QP:
 846         case MLX5_CMD_OP_2RST_QP:
 847         case MLX5_CMD_OP_ARM_XRC_SRQ:
 848         case MLX5_CMD_OP_ARM_RQ:
 849         case MLX5_CMD_OP_ARM_DCT_FOR_KEY_VIOLATION:
 850         case MLX5_CMD_OP_ARM_XRQ:
 851         case MLX5_CMD_OP_SET_XRQ_DC_PARAMS_ENTRY:
 852         case MLX5_CMD_OP_RELEASE_XRQ_ERROR:
 853         case MLX5_CMD_OP_MODIFY_XRQ:
 854                 return true;
 855         case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
 856         {
 857                 u16 op_mod = MLX5_GET(set_fte_in, in, op_mod);
 858
 859                 if (op_mod == 1)
 860                         return true;
 861                 return false;
 862         }
 863         default:
 864                 return false;
 865         }
 866 }
 867
 868 static bool devx_is_obj_query_cmd(const void *in)
 869 {
 870         u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
 871
 872         switch (opcode) {
 873         case MLX5_CMD_OP_QUERY_GENERAL_OBJECT:
 874         case MLX5_CMD_OP_QUERY_MKEY:
 875         case MLX5_CMD_OP_QUERY_CQ:
 876         case MLX5_CMD_OP_QUERY_RMP:
 877         case MLX5_CMD_OP_QUERY_SQ:
 878         case MLX5_CMD_OP_QUERY_RQ:
 879         case MLX5_CMD_OP_QUERY_RQT:
 880         case MLX5_CMD_OP_QUERY_TIR:
 881         case MLX5_CMD_OP_QUERY_TIS:
 882         case MLX5_CMD_OP_QUERY_Q_COUNTER:
 883         case MLX5_CMD_OP_QUERY_FLOW_TABLE:
 884         case MLX5_CMD_OP_QUERY_FLOW_GROUP:
 885         case MLX5_CMD_OP_QUERY_FLOW_TABLE_ENTRY:
 886         case MLX5_CMD_OP_QUERY_FLOW_COUNTER:
 887         case MLX5_CMD_OP_QUERY_MODIFY_HEADER_CONTEXT:
 888         case MLX5_CMD_OP_QUERY_SCHEDULING_ELEMENT:
 889         case MLX5_CMD_OP_QUERY_L2_TABLE_ENTRY:
 890         case MLX5_CMD_OP_QUERY_QP:
 891         case MLX5_CMD_OP_QUERY_SRQ:
 892         case MLX5_CMD_OP_QUERY_XRC_SRQ:
 893         case MLX5_CMD_OP_QUERY_DCT:
 894         case MLX5_CMD_OP_QUERY_XRQ:
 895         case MLX5_CMD_OP_QUERY_XRQ_DC_PARAMS_ENTRY:
 896         case MLX5_CMD_OP_QUERY_XRQ_ERROR_PARAMS:
 897         case MLX5_CMD_OP_QUERY_PACKET_REFORMAT_CONTEXT:
 898                 return true;
 899         default:
 900                 return false;
 901         }
 902 }
 903
 904 static bool devx_is_whitelist_cmd(void *in)
 905 {
 906         u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
 907
 908         switch (opcode) {
 909         case MLX5_CMD_OP_QUERY_HCA_CAP:
 910         case MLX5_CMD_OP_QUERY_HCA_VPORT_CONTEXT:
 911         case MLX5_CMD_OP_QUERY_ESW_VPORT_CONTEXT:
 912                 return true;
 913         default:
 914                 return false;
 915         }
 916 }
 917
 918 static int devx_get_uid(struct mlx5_ib_ucontext *c, void *cmd_in)
 919 {
 920         if (devx_is_whitelist_cmd(cmd_in)) {
 921                 struct mlx5_ib_dev *dev;
 922
 923                 if (c->devx_uid)
 924                         return c->devx_uid;
 925
 926                 dev = to_mdev(c->ibucontext.device);
 927                 if (dev->devx_whitelist_uid)
 928                         return dev->devx_whitelist_uid;
 929
 930                 return -EOPNOTSUPP;
 931         }
 932
 933         if (!c->devx_uid)
 934                 return -EINVAL;
 935
 936         return c->devx_uid;
 937 }
 938
 939 static bool devx_is_general_cmd(void *in, struct mlx5_ib_dev *dev)
 940 {
 941         u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
 942
 943         /* Pass all cmds for vhca_tunnel as general, tracking is done in FW */
 944         if ((MLX5_CAP_GEN_64(dev->mdev, vhca_tunnel_commands) &&
 945              MLX5_GET(general_obj_in_cmd_hdr, in, vhca_tunnel_id)) ||
 946             (opcode >= MLX5_CMD_OP_GENERAL_START &&
 947              opcode < MLX5_CMD_OP_GENERAL_END))
 948                 return true;
 949
 950         switch (opcode) {
 951         case MLX5_CMD_OP_QUERY_HCA_CAP:
 952         case MLX5_CMD_OP_QUERY_HCA_VPORT_CONTEXT:
 953         case MLX5_CMD_OP_QUERY_ESW_VPORT_CONTEXT:
 954         case MLX5_CMD_OP_QUERY_VPORT_STATE:
 955         case MLX5_CMD_OP_QUERY_ADAPTER:
 956         case MLX5_CMD_OP_QUERY_ISSI:
 957         case MLX5_CMD_OP_QUERY_NIC_VPORT_CONTEXT:
 958         case MLX5_CMD_OP_QUERY_ROCE_ADDRESS:
 959         case MLX5_CMD_OP_QUERY_VNIC_ENV:
 960         case MLX5_CMD_OP_QUERY_VPORT_COUNTER:
 961         case MLX5_CMD_OP_GET_DROPPED_PACKET_LOG:
 962         case MLX5_CMD_OP_NOP:
 963         case MLX5_CMD_OP_QUERY_CONG_STATUS:
 964         case MLX5_CMD_OP_QUERY_CONG_PARAMS:
 965         case MLX5_CMD_OP_QUERY_CONG_STATISTICS:
 966         case MLX5_CMD_OP_QUERY_LAG:
 967                 return true;
 968         default:
 969                 return false;
 970         }
 971 }
 972
 973 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_QUERY_EQN)(
 974         struct uverbs_attr_bundle *attrs)
 975 {
 976         struct mlx5_ib_ucontext *c;
 977         struct mlx5_ib_dev *dev;
 978         int user_vector;
 979         int dev_eqn;
 980         unsigned int irqn;
 981         int err;
 982
 983         if (uverbs_copy_from(&user_vector, attrs,
 984                              MLX5_IB_ATTR_DEVX_QUERY_EQN_USER_VEC))
 985                 return -EFAULT;
 986
 987         c = devx_ufile2uctx(attrs);
 988         if (IS_ERR(c))
 989                 return PTR_ERR(c);
 990         dev = to_mdev(c->ibucontext.device);
 991
 992         err = mlx5_vector2eqn(dev->mdev, user_vector, &dev_eqn, &irqn);
 993         if (err < 0)
 994                 return err;
 995
 996         if (uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_QUERY_EQN_DEV_EQN,
 997                            &dev_eqn, sizeof(dev_eqn)))
 998                 return -EFAULT;
 999
1000         return 0;
1001 }
1002
1003 /*
1004  *Security note:
1005  * The hardware protection mechanism works like this: Each device object that
1006  * is subject to UAR doorbells (QP/SQ/CQ) gets a UAR ID (called uar_page in
1007  * the device specification manual) upon its creation. Then upon doorbell,
1008  * hardware fetches the object context for which the doorbell was rang, and
1009  * validates that the UAR through which the DB was rang matches the UAR ID
1010  * of the object.
1011  * If no match the doorbell is silently ignored by the hardware. Of course,
1012  * the user cannot ring a doorbell on a UAR that was not mapped to it.
1013  * Now in devx, as the devx kernel does not manipulate the QP/SQ/CQ command
1014  * mailboxes (except tagging them with UID), we expose to the user its UAR
1015  * ID, so it can embed it in these objects in the expected specification
1016  * format. So the only thing the user can do is hurt itself by creating a
1017  * QP/SQ/CQ with a UAR ID other than his, and then in this case other users
1018  * may ring a doorbell on its objects.
1019  * The consequence of that will be that another user can schedule a QP/SQ
1020  * of the buggy user for execution (just insert it to the hardware schedule
1021  * queue or arm its CQ for event generation), no further harm is expected.
1022  */
1023 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_QUERY_UAR)(
1024         struct uverbs_attr_bundle *attrs)
1025 {
1026         struct mlx5_ib_ucontext *c;
1027         struct mlx5_ib_dev *dev;
1028         u32 user_idx;
1029         s32 dev_idx;
1030
1031         c = devx_ufile2uctx(attrs);
1032         if (IS_ERR(c))
1033                 return PTR_ERR(c);
1034         dev = to_mdev(c->ibucontext.device);
1035
1036         if (uverbs_copy_from(&user_idx, attrs,
1037                              MLX5_IB_ATTR_DEVX_QUERY_UAR_USER_IDX))
1038                 return -EFAULT;
1039
1040         dev_idx = bfregn_to_uar_index(dev, &c->bfregi, user_idx, true);
1041         if (dev_idx < 0)
1042                 return dev_idx;
1043
1044         if (uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_QUERY_UAR_DEV_IDX,
1045                            &dev_idx, sizeof(dev_idx)))
1046                 return -EFAULT;
1047
1048         return 0;
1049 }
1050
1051 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OTHER)(
1052         struct uverbs_attr_bundle *attrs)
1053 {
1054         struct mlx5_ib_ucontext *c;
1055         struct mlx5_ib_dev *dev;
1056         void *cmd_in = uverbs_attr_get_alloced_ptr(
1057                 attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_IN);
1058         int cmd_out_len = uverbs_attr_get_len(attrs,
1059                                         MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT);
1060         void *cmd_out;
1061         int err;
1062         int uid;
1063
1064         c = devx_ufile2uctx(attrs);
1065         if (IS_ERR(c))
1066                 return PTR_ERR(c);
1067         dev = to_mdev(c->ibucontext.device);
1068
1069         uid = devx_get_uid(c, cmd_in);
1070         if (uid < 0)
1071                 return uid;
1072
1073         /* Only white list of some general HCA commands are allowed for this method. */
1074         if (!devx_is_general_cmd(cmd_in, dev))
1075                 return -EINVAL;
1076
1077         cmd_out = uverbs_zalloc(attrs, cmd_out_len);
1078         if (IS_ERR(cmd_out))
1079                 return PTR_ERR(cmd_out);
1080
1081         MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1082         err = mlx5_cmd_exec(dev->mdev, cmd_in,
1083                             uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_IN),
1084                             cmd_out, cmd_out_len);
1085         if (err)
1086                 return err;
1087
1088         return uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT, cmd_out,
1089                               cmd_out_len);
1090 }
1091
1092 static void devx_obj_build_destroy_cmd(void *in, void *out, void *din,
1093                                        u32 *dinlen,
1094                                        u32 *obj_id)
1095 {
1096         u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
1097         u16 uid = MLX5_GET(general_obj_in_cmd_hdr, in, uid);
1098
1099         *obj_id = devx_get_created_obj_id(in, out, opcode);
1100         *dinlen = MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr);
1101         MLX5_SET(general_obj_in_cmd_hdr, din, uid, uid);
1102
1103         switch (opcode) {
1104         case MLX5_CMD_OP_CREATE_GENERAL_OBJECT:
1105                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_GENERAL_OBJECT);
1106                 MLX5_SET(general_obj_in_cmd_hdr, din, obj_id, *obj_id);
1107                 MLX5_SET(general_obj_in_cmd_hdr, din, obj_type,
1108                          MLX5_GET(general_obj_in_cmd_hdr, in, obj_type));
1109                 break;
1110
1111         case MLX5_CMD_OP_CREATE_UMEM:
1112                 MLX5_SET(destroy_umem_in, din, opcode,
1113                          MLX5_CMD_OP_DESTROY_UMEM);
1114                 MLX5_SET(destroy_umem_in, din, umem_id, *obj_id);
1115                 break;
1116         case MLX5_CMD_OP_CREATE_MKEY:
1117                 MLX5_SET(destroy_mkey_in, din, opcode,
1118                          MLX5_CMD_OP_DESTROY_MKEY);
1119                 MLX5_SET(destroy_mkey_in, in, mkey_index, *obj_id);
1120                 break;
1121         case MLX5_CMD_OP_CREATE_CQ:
1122                 MLX5_SET(destroy_cq_in, din, opcode, MLX5_CMD_OP_DESTROY_CQ);
1123                 MLX5_SET(destroy_cq_in, din, cqn, *obj_id);
1124                 break;
1125         case MLX5_CMD_OP_ALLOC_PD:
1126                 MLX5_SET(dealloc_pd_in, din, opcode, MLX5_CMD_OP_DEALLOC_PD);
1127                 MLX5_SET(dealloc_pd_in, din, pd, *obj_id);
1128                 break;
1129         case MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN:
1130                 MLX5_SET(dealloc_transport_domain_in, din, opcode,
1131                          MLX5_CMD_OP_DEALLOC_TRANSPORT_DOMAIN);
1132                 MLX5_SET(dealloc_transport_domain_in, din, transport_domain,
1133                          *obj_id);
1134                 break;
1135         case MLX5_CMD_OP_CREATE_RMP:
1136                 MLX5_SET(destroy_rmp_in, din, opcode, MLX5_CMD_OP_DESTROY_RMP);
1137                 MLX5_SET(destroy_rmp_in, din, rmpn, *obj_id);
1138                 break;
1139         case MLX5_CMD_OP_CREATE_SQ:
1140                 MLX5_SET(destroy_sq_in, din, opcode, MLX5_CMD_OP_DESTROY_SQ);
1141                 MLX5_SET(destroy_sq_in, din, sqn, *obj_id);
1142                 break;
1143         case MLX5_CMD_OP_CREATE_RQ:
1144                 MLX5_SET(destroy_rq_in, din, opcode, MLX5_CMD_OP_DESTROY_RQ);
1145                 MLX5_SET(destroy_rq_in, din, rqn, *obj_id);
1146                 break;
1147         case MLX5_CMD_OP_CREATE_RQT:
1148                 MLX5_SET(destroy_rqt_in, din, opcode, MLX5_CMD_OP_DESTROY_RQT);
1149                 MLX5_SET(destroy_rqt_in, din, rqtn, *obj_id);
1150                 break;
1151         case MLX5_CMD_OP_CREATE_TIR:
1152                 MLX5_SET(destroy_tir_in, din, opcode, MLX5_CMD_OP_DESTROY_TIR);
1153                 MLX5_SET(destroy_tir_in, din, tirn, *obj_id);
1154                 break;
1155         case MLX5_CMD_OP_CREATE_TIS:
1156                 MLX5_SET(destroy_tis_in, din, opcode, MLX5_CMD_OP_DESTROY_TIS);
1157                 MLX5_SET(destroy_tis_in, din, tisn, *obj_id);
1158                 break;
1159         case MLX5_CMD_OP_ALLOC_Q_COUNTER:
1160                 MLX5_SET(dealloc_q_counter_in, din, opcode,
1161                          MLX5_CMD_OP_DEALLOC_Q_COUNTER);
1162                 MLX5_SET(dealloc_q_counter_in, din, counter_set_id, *obj_id);
1163                 break;
1164         case MLX5_CMD_OP_CREATE_FLOW_TABLE:
1165                 *dinlen = MLX5_ST_SZ_BYTES(destroy_flow_table_in);
1166                 MLX5_SET(destroy_flow_table_in, din, other_vport,
1167                          MLX5_GET(create_flow_table_in,  in, other_vport));
1168                 MLX5_SET(destroy_flow_table_in, din, vport_number,
1169                          MLX5_GET(create_flow_table_in,  in, vport_number));
1170                 MLX5_SET(destroy_flow_table_in, din, table_type,
1171                          MLX5_GET(create_flow_table_in,  in, table_type));
1172                 MLX5_SET(destroy_flow_table_in, din, table_id, *obj_id);
1173                 MLX5_SET(destroy_flow_table_in, din, opcode,
1174                          MLX5_CMD_OP_DESTROY_FLOW_TABLE);
1175                 break;
1176         case MLX5_CMD_OP_CREATE_FLOW_GROUP:
1177                 *dinlen = MLX5_ST_SZ_BYTES(destroy_flow_group_in);
1178                 MLX5_SET(destroy_flow_group_in, din, other_vport,
1179                          MLX5_GET(create_flow_group_in, in, other_vport));
1180                 MLX5_SET(destroy_flow_group_in, din, vport_number,
1181                          MLX5_GET(create_flow_group_in, in, vport_number));
1182                 MLX5_SET(destroy_flow_group_in, din, table_type,
1183                          MLX5_GET(create_flow_group_in, in, table_type));
1184                 MLX5_SET(destroy_flow_group_in, din, table_id,
1185                          MLX5_GET(create_flow_group_in, in, table_id));
1186                 MLX5_SET(destroy_flow_group_in, din, group_id, *obj_id);
1187                 MLX5_SET(destroy_flow_group_in, din, opcode,
1188                          MLX5_CMD_OP_DESTROY_FLOW_GROUP);
1189                 break;
1190         case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
1191                 *dinlen = MLX5_ST_SZ_BYTES(delete_fte_in);
1192                 MLX5_SET(delete_fte_in, din, other_vport,
1193                          MLX5_GET(set_fte_in,  in, other_vport));
1194                 MLX5_SET(delete_fte_in, din, vport_number,
1195                          MLX5_GET(set_fte_in, in, vport_number));
1196                 MLX5_SET(delete_fte_in, din, table_type,
1197                          MLX5_GET(set_fte_in, in, table_type));
1198                 MLX5_SET(delete_fte_in, din, table_id,
1199                          MLX5_GET(set_fte_in, in, table_id));
1200                 MLX5_SET(delete_fte_in, din, flow_index, *obj_id);
1201                 MLX5_SET(delete_fte_in, din, opcode,
1202                          MLX5_CMD_OP_DELETE_FLOW_TABLE_ENTRY);
1203                 break;
1204         case MLX5_CMD_OP_ALLOC_FLOW_COUNTER:
1205                 MLX5_SET(dealloc_flow_counter_in, din, opcode,
1206                          MLX5_CMD_OP_DEALLOC_FLOW_COUNTER);
1207                 MLX5_SET(dealloc_flow_counter_in, din, flow_counter_id,
1208                          *obj_id);
1209                 break;
1210         case MLX5_CMD_OP_ALLOC_PACKET_REFORMAT_CONTEXT:
1211                 MLX5_SET(dealloc_packet_reformat_context_in, din, opcode,
1212                          MLX5_CMD_OP_DEALLOC_PACKET_REFORMAT_CONTEXT);
1213                 MLX5_SET(dealloc_packet_reformat_context_in, din,
1214                          packet_reformat_id, *obj_id);
1215                 break;
1216         case MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT:
1217                 MLX5_SET(dealloc_modify_header_context_in, din, opcode,
1218                          MLX5_CMD_OP_DEALLOC_MODIFY_HEADER_CONTEXT);
1219                 MLX5_SET(dealloc_modify_header_context_in, din,
1220                          modify_header_id, *obj_id);
1221                 break;
1222         case MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT:
1223                 *dinlen = MLX5_ST_SZ_BYTES(destroy_scheduling_element_in);
1224                 MLX5_SET(destroy_scheduling_element_in, din,
1225                          scheduling_hierarchy,
1226                          MLX5_GET(create_scheduling_element_in, in,
1227                                   scheduling_hierarchy));
1228                 MLX5_SET(destroy_scheduling_element_in, din,
1229                          scheduling_element_id, *obj_id);
1230                 MLX5_SET(destroy_scheduling_element_in, din, opcode,
1231                          MLX5_CMD_OP_DESTROY_SCHEDULING_ELEMENT);
1232                 break;
1233         case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
1234                 *dinlen = MLX5_ST_SZ_BYTES(delete_vxlan_udp_dport_in);
1235                 MLX5_SET(delete_vxlan_udp_dport_in, din, vxlan_udp_port, *obj_id);
1236                 MLX5_SET(delete_vxlan_udp_dport_in, din, opcode,
1237                          MLX5_CMD_OP_DELETE_VXLAN_UDP_DPORT);
1238                 break;
1239         case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
1240                 *dinlen = MLX5_ST_SZ_BYTES(delete_l2_table_entry_in);
1241                 MLX5_SET(delete_l2_table_entry_in, din, table_index, *obj_id);
1242                 MLX5_SET(delete_l2_table_entry_in, din, opcode,
1243                          MLX5_CMD_OP_DELETE_L2_TABLE_ENTRY);
1244                 break;
1245         case MLX5_CMD_OP_CREATE_QP:
1246                 MLX5_SET(destroy_qp_in, din, opcode, MLX5_CMD_OP_DESTROY_QP);
1247                 MLX5_SET(destroy_qp_in, din, qpn, *obj_id);
1248                 break;
1249         case MLX5_CMD_OP_CREATE_SRQ:
1250                 MLX5_SET(destroy_srq_in, din, opcode, MLX5_CMD_OP_DESTROY_SRQ);
1251                 MLX5_SET(destroy_srq_in, din, srqn, *obj_id);
1252                 break;
1253         case MLX5_CMD_OP_CREATE_XRC_SRQ:
1254                 MLX5_SET(destroy_xrc_srq_in, din, opcode,
1255                          MLX5_CMD_OP_DESTROY_XRC_SRQ);
1256                 MLX5_SET(destroy_xrc_srq_in, din, xrc_srqn, *obj_id);
1257                 break;
1258         case MLX5_CMD_OP_CREATE_DCT:
1259                 MLX5_SET(destroy_dct_in, din, opcode, MLX5_CMD_OP_DESTROY_DCT);
1260                 MLX5_SET(destroy_dct_in, din, dctn, *obj_id);
1261                 break;
1262         case MLX5_CMD_OP_CREATE_XRQ:
1263                 MLX5_SET(destroy_xrq_in, din, opcode, MLX5_CMD_OP_DESTROY_XRQ);
1264                 MLX5_SET(destroy_xrq_in, din, xrqn, *obj_id);
1265                 break;
1266         case MLX5_CMD_OP_ATTACH_TO_MCG:
1267                 *dinlen = MLX5_ST_SZ_BYTES(detach_from_mcg_in);
1268                 MLX5_SET(detach_from_mcg_in, din, qpn,
1269                          MLX5_GET(attach_to_mcg_in, in, qpn));
1270                 memcpy(MLX5_ADDR_OF(detach_from_mcg_in, din, multicast_gid),
1271                        MLX5_ADDR_OF(attach_to_mcg_in, in, multicast_gid),
1272                        MLX5_FLD_SZ_BYTES(attach_to_mcg_in, multicast_gid));
1273                 MLX5_SET(detach_from_mcg_in, din, opcode,
1274                          MLX5_CMD_OP_DETACH_FROM_MCG);
1275                 MLX5_SET(detach_from_mcg_in, din, qpn, *obj_id);
1276                 break;
1277         case MLX5_CMD_OP_ALLOC_XRCD:
1278                 MLX5_SET(dealloc_xrcd_in, din, opcode,
1279                          MLX5_CMD_OP_DEALLOC_XRCD);
1280                 MLX5_SET(dealloc_xrcd_in, din, xrcd, *obj_id);
1281                 break;
1282         case MLX5_CMD_OP_CREATE_PSV:
1283                 MLX5_SET(destroy_psv_in, din, opcode,
1284                          MLX5_CMD_OP_DESTROY_PSV);
1285                 MLX5_SET(destroy_psv_in, din, psvn, *obj_id);
1286                 break;
1287         default:
1288                 /* The entry must match to one of the devx_is_obj_create_cmd */
1289                 WARN_ON(true);
1290                 break;
1291         }
1292 }
1293
1294 static int devx_handle_mkey_indirect(struct devx_obj *obj,
1295                                      struct mlx5_ib_dev *dev,
1296                                      void *in, void *out)
1297 {
1298         struct mlx5_ib_devx_mr *devx_mr = &obj->devx_mr;
1299         struct mlx5_core_mkey *mkey;
1300         void *mkc;
1301         u8 key;
1302
1303         mkey = &devx_mr->mmkey;
1304         mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry);
1305         key = MLX5_GET(mkc, mkc, mkey_7_0);
1306         mkey->key = mlx5_idx_to_mkey(
1307                         MLX5_GET(create_mkey_out, out, mkey_index)) | key;
1308         mkey->type = MLX5_MKEY_INDIRECT_DEVX;
1309         mkey->iova = MLX5_GET64(mkc, mkc, start_addr);
1310         mkey->size = MLX5_GET64(mkc, mkc, len);
1311         mkey->pd = MLX5_GET(mkc, mkc, pd);
1312         devx_mr->ndescs = MLX5_GET(mkc, mkc, translations_octword_size);
1313         init_waitqueue_head(&mkey->wait);
1314
1315         return mlx5r_store_odp_mkey(dev, mkey);
1316 }
1317
1318 static int devx_handle_mkey_create(struct mlx5_ib_dev *dev,
1319                                    struct devx_obj *obj,
1320                                    void *in, int in_len)
1321 {
1322         int min_len = MLX5_BYTE_OFF(create_mkey_in, memory_key_mkey_entry) +
1323                         MLX5_FLD_SZ_BYTES(create_mkey_in,
1324                         memory_key_mkey_entry);
1325         void *mkc;
1326         u8 access_mode;
1327
1328         if (in_len < min_len)
1329                 return -EINVAL;
1330
1331         mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry);
1332
1333         access_mode = MLX5_GET(mkc, mkc, access_mode_1_0);
1334         access_mode |= MLX5_GET(mkc, mkc, access_mode_4_2) << 2;
1335
1336         if (access_mode == MLX5_MKC_ACCESS_MODE_KLMS ||
1337                 access_mode == MLX5_MKC_ACCESS_MODE_KSM) {
1338                 if (IS_ENABLED(CONFIG_INFINIBAND_ON_DEMAND_PAGING))
1339                         obj->flags |= DEVX_OBJ_FLAGS_INDIRECT_MKEY;
1340                 return 0;
1341         }
1342
1343         MLX5_SET(create_mkey_in, in, mkey_umem_valid, 1);
1344         return 0;
1345 }
1346
1347 static void devx_cleanup_subscription(struct mlx5_ib_dev *dev,
1348                                       struct devx_event_subscription *sub)
1349 {
1350         struct devx_event *event;
1351         struct devx_obj_event *xa_val_level2;
1352
1353         if (sub->is_cleaned)
1354                 return;
1355
1356         sub->is_cleaned = 1;
1357         list_del_rcu(&sub->xa_list);
1358
1359         if (list_empty(&sub->obj_list))
1360                 return;
1361
1362         list_del_rcu(&sub->obj_list);
1363         /* check whether key level 1 for this obj_sub_list is empty */
1364         event = xa_load(&dev->devx_event_table.event_xa,
1365                         sub->xa_key_level1);
1366         WARN_ON(!event);
1367
1368         xa_val_level2 = xa_load(&event->object_ids, sub->xa_key_level2);
1369         if (list_empty(&xa_val_level2->obj_sub_list)) {
1370                 xa_erase(&event->object_ids,
1371                          sub->xa_key_level2);
1372                 kfree_rcu(xa_val_level2, rcu);
1373         }
1374 }
1375
1376 static int devx_obj_cleanup(struct ib_uobject *uobject,
1377                             enum rdma_remove_reason why,
1378                             struct uverbs_attr_bundle *attrs)
1379 {
1380         u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
1381         struct mlx5_devx_event_table *devx_event_table;
1382         struct devx_obj *obj = uobject->object;
1383         struct devx_event_subscription *sub_entry, *tmp;
1384         struct mlx5_ib_dev *dev;
1385         int ret;
1386
1387         dev = mlx5_udata_to_mdev(&attrs->driver_udata);
1388         if (obj->flags & DEVX_OBJ_FLAGS_INDIRECT_MKEY &&
1389             xa_erase(&obj->ib_dev->odp_mkeys,
1390                      mlx5_base_mkey(obj->devx_mr.mmkey.key)))
1391                 /*
1392                  * The pagefault_single_data_segment() does commands against
1393                  * the mmkey, we must wait for that to stop before freeing the
1394                  * mkey, as another allocation could get the same mkey #.
1395                  */
1396                 mlx5r_deref_wait_odp_mkey(&obj->devx_mr.mmkey);
1397
1398         if (obj->flags & DEVX_OBJ_FLAGS_DCT)
1399                 ret = mlx5_core_destroy_dct(obj->ib_dev, &obj->core_dct);
1400         else if (obj->flags & DEVX_OBJ_FLAGS_CQ)
1401                 ret = mlx5_core_destroy_cq(obj->ib_dev->mdev, &obj->core_cq);
1402         else
1403                 ret = mlx5_cmd_exec(obj->ib_dev->mdev, obj->dinbox,
1404                                     obj->dinlen, out, sizeof(out));
1405         if (ret)
1406                 return ret;
1407
1408         devx_event_table = &dev->devx_event_table;
1409
1410         mutex_lock(&devx_event_table->event_xa_lock);
1411         list_for_each_entry_safe(sub_entry, tmp, &obj->event_sub, obj_list)
1412                 devx_cleanup_subscription(dev, sub_entry);
1413         mutex_unlock(&devx_event_table->event_xa_lock);
1414
1415         kfree(obj);
1416         return ret;
1417 }
1418
1419 static void devx_cq_comp(struct mlx5_core_cq *mcq, struct mlx5_eqe *eqe)
1420 {
1421         struct devx_obj *obj = container_of(mcq, struct devx_obj, core_cq);
1422         struct mlx5_devx_event_table *table;
1423         struct devx_event *event;
1424         struct devx_obj_event *obj_event;
1425         u32 obj_id = mcq->cqn;
1426
1427         table = &obj->ib_dev->devx_event_table;
1428         rcu_read_lock();
1429         event = xa_load(&table->event_xa, MLX5_EVENT_TYPE_COMP);
1430         if (!event)
1431                 goto out;
1432
1433         obj_event = xa_load(&event->object_ids, obj_id);
1434         if (!obj_event)
1435                 goto out;
1436
1437         dispatch_event_fd(&obj_event->obj_sub_list, eqe);
1438 out:
1439         rcu_read_unlock();
1440 }
1441
1442 static bool is_apu_thread_cq(struct mlx5_ib_dev *dev, const void *in)
1443 {
1444         if (!MLX5_CAP_GEN(dev->mdev, apu) ||
1445             !MLX5_GET(cqc, MLX5_ADDR_OF(create_cq_in, in, cq_context),
1446                       apu_thread_cq))
1447                 return false;
1448
1449         return true;
1450 }
1451
1452 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_CREATE)(
1453         struct uverbs_attr_bundle *attrs)
1454 {
1455         void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN);
1456         int cmd_out_len =  uverbs_attr_get_len(attrs,
1457                                         MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT);
1458         int cmd_in_len = uverbs_attr_get_len(attrs,
1459                                         MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN);
1460         void *cmd_out;
1461         struct ib_uobject *uobj = uverbs_attr_get_uobject(
1462                 attrs, MLX5_IB_ATTR_DEVX_OBJ_CREATE_HANDLE);
1463         struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1464                 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1465         struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
1466         u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
1467         struct devx_obj *obj;
1468         u16 obj_type = 0;
1469         int err;
1470         int uid;
1471         u32 obj_id;
1472         u16 opcode;
1473
1474         if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id))
1475                 return -EINVAL;
1476
1477         uid = devx_get_uid(c, cmd_in);
1478         if (uid < 0)
1479                 return uid;
1480
1481         if (!devx_is_obj_create_cmd(cmd_in, &opcode))
1482                 return -EINVAL;
1483
1484         cmd_out = uverbs_zalloc(attrs, cmd_out_len);
1485         if (IS_ERR(cmd_out))
1486                 return PTR_ERR(cmd_out);
1487
1488         obj = kzalloc(sizeof(struct devx_obj), GFP_KERNEL);
1489         if (!obj)
1490                 return -ENOMEM;
1491
1492         MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1493         if (opcode == MLX5_CMD_OP_CREATE_MKEY) {
1494                 err = devx_handle_mkey_create(dev, obj, cmd_in, cmd_in_len);
1495                 if (err)
1496                         goto obj_free;
1497         } else {
1498                 devx_set_umem_valid(cmd_in);
1499         }
1500
1501         if (opcode == MLX5_CMD_OP_CREATE_DCT) {
1502                 obj->flags |= DEVX_OBJ_FLAGS_DCT;
1503                 err = mlx5_core_create_dct(dev, &obj->core_dct, cmd_in,
1504                                            cmd_in_len, cmd_out, cmd_out_len);
1505         } else if (opcode == MLX5_CMD_OP_CREATE_CQ &&
1506                    !is_apu_thread_cq(dev, cmd_in)) {
1507                 obj->flags |= DEVX_OBJ_FLAGS_CQ;
1508                 obj->core_cq.comp = devx_cq_comp;
1509                 err = mlx5_core_create_cq(dev->mdev, &obj->core_cq,
1510                                           cmd_in, cmd_in_len, cmd_out,
1511                                           cmd_out_len);
1512         } else {
1513                 err = mlx5_cmd_exec(dev->mdev, cmd_in,
1514                                     cmd_in_len,
1515                                     cmd_out, cmd_out_len);
1516         }
1517
1518         if (err)
1519                 goto obj_free;
1520
1521         if (opcode == MLX5_CMD_OP_ALLOC_FLOW_COUNTER) {
1522                 u8 bulk = MLX5_GET(alloc_flow_counter_in,
1523                                    cmd_in,
1524                                    flow_counter_bulk);
1525                 obj->flow_counter_bulk_size = 128UL * bulk;
1526         }
1527
1528         uobj->object = obj;
1529         INIT_LIST_HEAD(&obj->event_sub);
1530         obj->ib_dev = dev;
1531         devx_obj_build_destroy_cmd(cmd_in, cmd_out, obj->dinbox, &obj->dinlen,
1532                                    &obj_id);
1533         WARN_ON(obj->dinlen > MLX5_MAX_DESTROY_INBOX_SIZE_DW * sizeof(u32));
1534
1535         err = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT, cmd_out, cmd_out_len);
1536         if (err)
1537                 goto obj_destroy;
1538
1539         if (opcode == MLX5_CMD_OP_CREATE_GENERAL_OBJECT)
1540                 obj_type = MLX5_GET(general_obj_in_cmd_hdr, cmd_in, obj_type);
1541         obj->obj_id = get_enc_obj_id(opcode | obj_type << 16, obj_id);
1542
1543         if (obj->flags & DEVX_OBJ_FLAGS_INDIRECT_MKEY) {
1544                 err = devx_handle_mkey_indirect(obj, dev, cmd_in, cmd_out);
1545                 if (err)
1546                         goto obj_destroy;
1547         }
1548         return 0;
1549
1550 obj_destroy:
1551         if (obj->flags & DEVX_OBJ_FLAGS_DCT)
1552                 mlx5_core_destroy_dct(obj->ib_dev, &obj->core_dct);
1553         else if (obj->flags & DEVX_OBJ_FLAGS_CQ)
1554                 mlx5_core_destroy_cq(obj->ib_dev->mdev, &obj->core_cq);
1555         else
1556                 mlx5_cmd_exec(obj->ib_dev->mdev, obj->dinbox, obj->dinlen, out,
1557                               sizeof(out));
1558 obj_free:
1559         kfree(obj);
1560         return err;
1561 }
1562
1563 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_MODIFY)(
1564         struct uverbs_attr_bundle *attrs)
1565 {
1566         void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN);
1567         int cmd_out_len = uverbs_attr_get_len(attrs,
1568                                         MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT);
1569         struct ib_uobject *uobj = uverbs_attr_get_uobject(attrs,
1570                                                           MLX5_IB_ATTR_DEVX_OBJ_MODIFY_HANDLE);
1571         struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1572                 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1573         struct mlx5_ib_dev *mdev = to_mdev(c->ibucontext.device);
1574         void *cmd_out;
1575         int err;
1576         int uid;
1577
1578         if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id))
1579                 return -EINVAL;
1580
1581         uid = devx_get_uid(c, cmd_in);
1582         if (uid < 0)
1583                 return uid;
1584
1585         if (!devx_is_obj_modify_cmd(cmd_in))
1586                 return -EINVAL;
1587
1588         if (!devx_is_valid_obj_id(attrs, uobj, cmd_in))
1589                 return -EINVAL;
1590
1591         cmd_out = uverbs_zalloc(attrs, cmd_out_len);
1592         if (IS_ERR(cmd_out))
1593                 return PTR_ERR(cmd_out);
1594
1595         MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1596         devx_set_umem_valid(cmd_in);
1597
1598         err = mlx5_cmd_exec(mdev->mdev, cmd_in,
1599                             uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN),
1600                             cmd_out, cmd_out_len);
1601         if (err)
1602                 return err;
1603
1604         return uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT,
1605                               cmd_out, cmd_out_len);
1606 }
1607
1608 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_QUERY)(
1609         struct uverbs_attr_bundle *attrs)
1610 {
1611         void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN);
1612         int cmd_out_len = uverbs_attr_get_len(attrs,
1613                                               MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT);
1614         struct ib_uobject *uobj = uverbs_attr_get_uobject(attrs,
1615                                                           MLX5_IB_ATTR_DEVX_OBJ_QUERY_HANDLE);
1616         struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1617                 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1618         void *cmd_out;
1619         int err;
1620         int uid;
1621         struct mlx5_ib_dev *mdev = to_mdev(c->ibucontext.device);
1622
1623         if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id))
1624                 return -EINVAL;
1625
1626         uid = devx_get_uid(c, cmd_in);
1627         if (uid < 0)
1628                 return uid;
1629
1630         if (!devx_is_obj_query_cmd(cmd_in))
1631                 return -EINVAL;
1632
1633         if (!devx_is_valid_obj_id(attrs, uobj, cmd_in))
1634                 return -EINVAL;
1635
1636         cmd_out = uverbs_zalloc(attrs, cmd_out_len);
1637         if (IS_ERR(cmd_out))
1638                 return PTR_ERR(cmd_out);
1639
1640         MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1641         err = mlx5_cmd_exec(mdev->mdev, cmd_in,
1642                             uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN),
1643                             cmd_out, cmd_out_len);
1644         if (err)
1645                 return err;
1646
1647         return uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT,
1648                               cmd_out, cmd_out_len);
1649 }
1650
1651 struct devx_async_event_queue {
1652         spinlock_t              lock;
1653         wait_queue_head_t       poll_wait;
1654         struct list_head        event_list;
1655         atomic_t                bytes_in_use;
1656         u8                      is_destroyed:1;
1657 };
1658
1659 struct devx_async_cmd_event_file {
1660         struct ib_uobject               uobj;
1661         struct devx_async_event_queue   ev_queue;
1662         struct mlx5_async_ctx           async_ctx;
1663 };
1664
1665 static void devx_init_event_queue(struct devx_async_event_queue *ev_queue)
1666 {
1667         spin_lock_init(&ev_queue->lock);
1668         INIT_LIST_HEAD(&ev_queue->event_list);
1669         init_waitqueue_head(&ev_queue->poll_wait);
1670         atomic_set(&ev_queue->bytes_in_use, 0);
1671         ev_queue->is_destroyed = 0;
1672 }
1673
1674 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC)(
1675         struct uverbs_attr_bundle *attrs)
1676 {
1677         struct devx_async_cmd_event_file *ev_file;
1678
1679         struct ib_uobject *uobj = uverbs_attr_get_uobject(
1680                 attrs, MLX5_IB_ATTR_DEVX_ASYNC_CMD_FD_ALLOC_HANDLE);
1681         struct mlx5_ib_dev *mdev = mlx5_udata_to_mdev(&attrs->driver_udata);
1682
1683         ev_file = container_of(uobj, struct devx_async_cmd_event_file,
1684                                uobj);
1685         devx_init_event_queue(&ev_file->ev_queue);
1686         mlx5_cmd_init_async_ctx(mdev->mdev, &ev_file->async_ctx);
1687         return 0;
1688 }
1689
1690 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC)(
1691         struct uverbs_attr_bundle *attrs)
1692 {
1693         struct ib_uobject *uobj = uverbs_attr_get_uobject(
1694                 attrs, MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_HANDLE);
1695         struct devx_async_event_file *ev_file;
1696         struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1697                 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1698         struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
1699         u32 flags;
1700         int err;
1701
1702         err = uverbs_get_flags32(&flags, attrs,
1703                 MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_FLAGS,
1704                 MLX5_IB_UAPI_DEVX_CR_EV_CH_FLAGS_OMIT_DATA);
1705
1706         if (err)
1707                 return err;
1708
1709         ev_file = container_of(uobj, struct devx_async_event_file,
1710                                uobj);
1711         spin_lock_init(&ev_file->lock);
1712         INIT_LIST_HEAD(&ev_file->event_list);
1713         init_waitqueue_head(&ev_file->poll_wait);
1714         if (flags & MLX5_IB_UAPI_DEVX_CR_EV_CH_FLAGS_OMIT_DATA)
1715                 ev_file->omit_data = 1;
1716         INIT_LIST_HEAD(&ev_file->subscribed_events_list);
1717         ev_file->dev = dev;
1718         get_device(&dev->ib_dev.dev);
1719         return 0;
1720 }
1721
1722 static void devx_query_callback(int status, struct mlx5_async_work *context)
1723 {
1724         struct devx_async_data *async_data =
1725                 container_of(context, struct devx_async_data, cb_work);
1726         struct devx_async_cmd_event_file *ev_file = async_data->ev_file;
1727         struct devx_async_event_queue *ev_queue = &ev_file->ev_queue;
1728         unsigned long flags;
1729
1730         /*
1731          * Note that if the struct devx_async_cmd_event_file uobj begins to be
1732          * destroyed it will block at mlx5_cmd_cleanup_async_ctx() until this
1733          * routine returns, ensuring that it always remains valid here.
1734          */
1735         spin_lock_irqsave(&ev_queue->lock, flags);
1736         list_add_tail(&async_data->list, &ev_queue->event_list);
1737         spin_unlock_irqrestore(&ev_queue->lock, flags);
1738
1739         wake_up_interruptible(&ev_queue->poll_wait);
1740 }
1741
1742 #define MAX_ASYNC_BYTES_IN_USE (1024 * 1024) /* 1MB */
1743
1744 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_ASYNC_QUERY)(
1745         struct uverbs_attr_bundle *attrs)
1746 {
1747         void *cmd_in = uverbs_attr_get_alloced_ptr(attrs,
1748                                 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_CMD_IN);
1749         struct ib_uobject *uobj = uverbs_attr_get_uobject(
1750                                 attrs,
1751                                 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_HANDLE);
1752         u16 cmd_out_len;
1753         struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1754                 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1755         struct ib_uobject *fd_uobj;
1756         int err;
1757         int uid;
1758         struct mlx5_ib_dev *mdev = to_mdev(c->ibucontext.device);
1759         struct devx_async_cmd_event_file *ev_file;
1760         struct devx_async_data *async_data;
1761
1762         if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id))
1763                 return -EINVAL;
1764
1765         uid = devx_get_uid(c, cmd_in);
1766         if (uid < 0)
1767                 return uid;
1768
1769         if (!devx_is_obj_query_cmd(cmd_in))
1770                 return -EINVAL;
1771
1772         err = uverbs_get_const(&cmd_out_len, attrs,
1773                                MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_OUT_LEN);
1774         if (err)
1775                 return err;
1776
1777         if (!devx_is_valid_obj_id(attrs, uobj, cmd_in))
1778                 return -EINVAL;
1779
1780         fd_uobj = uverbs_attr_get_uobject(attrs,
1781                                 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_FD);
1782         if (IS_ERR(fd_uobj))
1783                 return PTR_ERR(fd_uobj);
1784
1785         ev_file = container_of(fd_uobj, struct devx_async_cmd_event_file,
1786                                uobj);
1787
1788         if (atomic_add_return(cmd_out_len, &ev_file->ev_queue.bytes_in_use) >
1789                         MAX_ASYNC_BYTES_IN_USE) {
1790                 atomic_sub(cmd_out_len, &ev_file->ev_queue.bytes_in_use);
1791                 return -EAGAIN;
1792         }
1793
1794         async_data = kvzalloc(struct_size(async_data, hdr.out_data,
1795                                           cmd_out_len), GFP_KERNEL);
1796         if (!async_data) {
1797                 err = -ENOMEM;
1798                 goto sub_bytes;
1799         }
1800
1801         err = uverbs_copy_from(&async_data->hdr.wr_id, attrs,
1802                                MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_WR_ID);
1803         if (err)
1804                 goto free_async;
1805
1806         async_data->cmd_out_len = cmd_out_len;
1807         async_data->mdev = mdev;
1808         async_data->ev_file = ev_file;
1809
1810         MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1811         err = mlx5_cmd_exec_cb(&ev_file->async_ctx, cmd_in,
1812                     uverbs_attr_get_len(attrs,
1813                                 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_CMD_IN),
1814                     async_data->hdr.out_data,
1815                     async_data->cmd_out_len,
1816                     devx_query_callback, &async_data->cb_work);
1817
1818         if (err)
1819                 goto free_async;
1820
1821         return 0;
1822
1823 free_async:
1824         kvfree(async_data);
1825 sub_bytes:
1826         atomic_sub(cmd_out_len, &ev_file->ev_queue.bytes_in_use);
1827         return err;
1828 }
1829
1830 static void
1831 subscribe_event_xa_dealloc(struct mlx5_devx_event_table *devx_event_table,
1832                            u32 key_level1,
1833                            bool is_level2,
1834                            u32 key_level2)
1835 {
1836         struct devx_event *event;
1837         struct devx_obj_event *xa_val_level2;
1838
1839         /* Level 1 is valid for future use, no need to free */
1840         if (!is_level2)
1841                 return;
1842
1843         event = xa_load(&devx_event_table->event_xa, key_level1);
1844         WARN_ON(!event);
1845
1846         xa_val_level2 = xa_load(&event->object_ids,
1847                                 key_level2);
1848         if (list_empty(&xa_val_level2->obj_sub_list)) {
1849                 xa_erase(&event->object_ids,
1850                          key_level2);
1851                 kfree_rcu(xa_val_level2, rcu);
1852         }
1853 }
1854
1855 static int
1856 subscribe_event_xa_alloc(struct mlx5_devx_event_table *devx_event_table,
1857                          u32 key_level1,
1858                          bool is_level2,
1859                          u32 key_level2)
1860 {
1861         struct devx_obj_event *obj_event;
1862         struct devx_event *event;
1863         int err;
1864
1865         event = xa_load(&devx_event_table->event_xa, key_level1);
1866         if (!event) {
1867                 event = kzalloc(sizeof(*event), GFP_KERNEL);
1868                 if (!event)
1869                         return -ENOMEM;
1870
1871                 INIT_LIST_HEAD(&event->unaffiliated_list);
1872                 xa_init(&event->object_ids);
1873
1874                 err = xa_insert(&devx_event_table->event_xa,
1875                                 key_level1,
1876                                 event,
1877                                 GFP_KERNEL);
1878                 if (err) {
1879                         kfree(event);
1880                         return err;
1881                 }
1882         }
1883
1884         if (!is_level2)
1885                 return 0;
1886
1887         obj_event = xa_load(&event->object_ids, key_level2);
1888         if (!obj_event) {
1889                 obj_event = kzalloc(sizeof(*obj_event), GFP_KERNEL);
1890                 if (!obj_event)
1891                         /* Level1 is valid for future use, no need to free */
1892                         return -ENOMEM;
1893
1894                 err = xa_insert(&event->object_ids,
1895                                 key_level2,
1896                                 obj_event,
1897                                 GFP_KERNEL);
1898                 if (err)
1899                         return err;
1900                 INIT_LIST_HEAD(&obj_event->obj_sub_list);
1901         }
1902
1903         return 0;
1904 }
1905
1906 static bool is_valid_events_legacy(int num_events, u16 *event_type_num_list,
1907                                    struct devx_obj *obj)
1908 {
1909         int i;
1910
1911         for (i = 0; i < num_events; i++) {
1912                 if (obj) {
1913                         if (!is_legacy_obj_event_num(event_type_num_list[i]))
1914                                 return false;
1915                 } else if (!is_legacy_unaffiliated_event_num(
1916                                 event_type_num_list[i])) {
1917                         return false;
1918                 }
1919         }
1920
1921         return true;
1922 }
1923
1924 #define MAX_SUPP_EVENT_NUM 255
1925 static bool is_valid_events(struct mlx5_core_dev *dev,
1926                             int num_events, u16 *event_type_num_list,
1927                             struct devx_obj *obj)
1928 {
1929         __be64 *aff_events;
1930         __be64 *unaff_events;
1931         int mask_entry;
1932         int mask_bit;
1933         int i;
1934
1935         if (MLX5_CAP_GEN(dev, event_cap)) {
1936                 aff_events = MLX5_CAP_DEV_EVENT(dev,
1937                                                 user_affiliated_events);
1938                 unaff_events = MLX5_CAP_DEV_EVENT(dev,
1939                                                   user_unaffiliated_events);
1940         } else {
1941                 return is_valid_events_legacy(num_events, event_type_num_list,
1942                                               obj);
1943         }
1944
1945         for (i = 0; i < num_events; i++) {
1946                 if (event_type_num_list[i] > MAX_SUPP_EVENT_NUM)
1947                         return false;
1948
1949                 mask_entry = event_type_num_list[i] / 64;
1950                 mask_bit = event_type_num_list[i] % 64;
1951
1952                 if (obj) {
1953                         /* CQ completion */
1954                         if (event_type_num_list[i] == 0)
1955                                 continue;
1956
1957                         if (!(be64_to_cpu(aff_events[mask_entry]) &
1958                                         (1ull << mask_bit)))
1959                                 return false;
1960
1961                         continue;
1962                 }
1963
1964                 if (!(be64_to_cpu(unaff_events[mask_entry]) &
1965                                 (1ull << mask_bit)))
1966                         return false;
1967         }
1968
1969         return true;
1970 }
1971
1972 #define MAX_NUM_EVENTS 16
1973 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT)(
1974         struct uverbs_attr_bundle *attrs)
1975 {
1976         struct ib_uobject *devx_uobj = uverbs_attr_get_uobject(
1977                                 attrs,
1978                                 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_OBJ_HANDLE);
1979         struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1980                 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1981         struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
1982         struct ib_uobject *fd_uobj;
1983         struct devx_obj *obj = NULL;
1984         struct devx_async_event_file *ev_file;
1985         struct mlx5_devx_event_table *devx_event_table = &dev->devx_event_table;
1986         u16 *event_type_num_list;
1987         struct devx_event_subscription *event_sub, *tmp_sub;
1988         struct list_head sub_list;
1989         int redirect_fd;
1990         bool use_eventfd = false;
1991         int num_events;
1992         int num_alloc_xa_entries = 0;
1993         u16 obj_type = 0;
1994         u64 cookie = 0;
1995         u32 obj_id = 0;
1996         int err;
1997         int i;
1998
1999         if (!c->devx_uid)
2000                 return -EINVAL;
2001
2002         if (!IS_ERR(devx_uobj)) {
2003                 obj = (struct devx_obj *)devx_uobj->object;
2004                 if (obj)
2005                         obj_id = get_dec_obj_id(obj->obj_id);
2006         }
2007
2008         fd_uobj = uverbs_attr_get_uobject(attrs,
2009                                 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_HANDLE);
2010         if (IS_ERR(fd_uobj))
2011                 return PTR_ERR(fd_uobj);
2012
2013         ev_file = container_of(fd_uobj, struct devx_async_event_file,
2014                                uobj);
2015
2016         if (uverbs_attr_is_valid(attrs,
2017                                  MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_NUM)) {
2018                 err = uverbs_copy_from(&redirect_fd, attrs,
2019                                MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_NUM);
2020                 if (err)
2021                         return err;
2022
2023                 use_eventfd = true;
2024         }
2025
2026         if (uverbs_attr_is_valid(attrs,
2027                                  MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_COOKIE)) {
2028                 if (use_eventfd)
2029                         return -EINVAL;
2030
2031                 err = uverbs_copy_from(&cookie, attrs,
2032                                 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_COOKIE);
2033                 if (err)
2034                         return err;
2035         }
2036
2037         num_events = uverbs_attr_ptr_get_array_size(
2038                 attrs, MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_TYPE_NUM_LIST,
2039                 sizeof(u16));
2040
2041         if (num_events < 0)
2042                 return num_events;
2043
2044         if (num_events > MAX_NUM_EVENTS)
2045                 return -EINVAL;
2046
2047         event_type_num_list = uverbs_attr_get_alloced_ptr(attrs,
2048                         MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_TYPE_NUM_LIST);
2049
2050         if (!is_valid_events(dev->mdev, num_events, event_type_num_list, obj))
2051                 return -EINVAL;
2052
2053         INIT_LIST_HEAD(&sub_list);
2054
2055         /* Protect from concurrent subscriptions to same XA entries to allow
2056          * both to succeed
2057          */
2058         mutex_lock(&devx_event_table->event_xa_lock);
2059         for (i = 0; i < num_events; i++) {
2060                 u32 key_level1;
2061
2062                 if (obj)
2063                         obj_type = get_dec_obj_type(obj,
2064                                                     event_type_num_list[i]);
2065                 key_level1 = event_type_num_list[i] | obj_type << 16;
2066
2067                 err = subscribe_event_xa_alloc(devx_event_table,
2068                                                key_level1,
2069                                                obj,
2070                                                obj_id);
2071                 if (err)
2072                         goto err;
2073
2074                 num_alloc_xa_entries++;
2075                 event_sub = kzalloc(sizeof(*event_sub), GFP_KERNEL);
2076                 if (!event_sub)
2077                         goto err;
2078
2079                 list_add_tail(&event_sub->event_list, &sub_list);
2080                 uverbs_uobject_get(&ev_file->uobj);
2081                 if (use_eventfd) {
2082                         event_sub->eventfd =
2083                                 eventfd_ctx_fdget(redirect_fd);
2084
2085                         if (IS_ERR(event_sub->eventfd)) {
2086                                 err = PTR_ERR(event_sub->eventfd);
2087                                 event_sub->eventfd = NULL;
2088                                 goto err;
2089                         }
2090                 }
2091
2092                 event_sub->cookie = cookie;
2093                 event_sub->ev_file = ev_file;
2094                 /* May be needed upon cleanup the devx object/subscription */
2095                 event_sub->xa_key_level1 = key_level1;
2096                 event_sub->xa_key_level2 = obj_id;
2097                 INIT_LIST_HEAD(&event_sub->obj_list);
2098         }
2099
2100         /* Once all the allocations and the XA data insertions were done we
2101          * can go ahead and add all the subscriptions to the relevant lists
2102          * without concern of a failure.
2103          */
2104         list_for_each_entry_safe(event_sub, tmp_sub, &sub_list, event_list) {
2105                 struct devx_event *event;
2106                 struct devx_obj_event *obj_event;
2107
2108                 list_del_init(&event_sub->event_list);
2109
2110                 spin_lock_irq(&ev_file->lock);
2111                 list_add_tail_rcu(&event_sub->file_list,
2112                                   &ev_file->subscribed_events_list);
2113                 spin_unlock_irq(&ev_file->lock);
2114
2115                 event = xa_load(&devx_event_table->event_xa,
2116                                 event_sub->xa_key_level1);
2117                 WARN_ON(!event);
2118
2119                 if (!obj) {
2120                         list_add_tail_rcu(&event_sub->xa_list,
2121                                           &event->unaffiliated_list);
2122                         continue;
2123                 }
2124
2125                 obj_event = xa_load(&event->object_ids, obj_id);
2126                 WARN_ON(!obj_event);
2127                 list_add_tail_rcu(&event_sub->xa_list,
2128                                   &obj_event->obj_sub_list);
2129                 list_add_tail_rcu(&event_sub->obj_list,
2130                                   &obj->event_sub);
2131         }
2132
2133         mutex_unlock(&devx_event_table->event_xa_lock);
2134         return 0;
2135
2136 err:
2137         list_for_each_entry_safe(event_sub, tmp_sub, &sub_list, event_list) {
2138                 list_del(&event_sub->event_list);
2139
2140                 subscribe_event_xa_dealloc(devx_event_table,
2141                                            event_sub->xa_key_level1,
2142                                            obj,
2143                                            obj_id);
2144
2145                 if (event_sub->eventfd)
2146                         eventfd_ctx_put(event_sub->eventfd);
2147                 uverbs_uobject_put(&event_sub->ev_file->uobj);
2148                 kfree(event_sub);
2149         }
2150
2151         mutex_unlock(&devx_event_table->event_xa_lock);
2152         return err;
2153 }
2154
2155 static int devx_umem_get(struct mlx5_ib_dev *dev, struct ib_ucontext *ucontext,
2156                          struct uverbs_attr_bundle *attrs,
2157                          struct devx_umem *obj)
2158 {
2159         u64 addr;
2160         size_t size;
2161         u32 access;
2162         int err;
2163
2164         if (uverbs_copy_from(&addr, attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_ADDR) ||
2165             uverbs_copy_from(&size, attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_LEN))
2166                 return -EFAULT;
2167
2168         err = uverbs_get_flags32(&access, attrs,
2169                                  MLX5_IB_ATTR_DEVX_UMEM_REG_ACCESS,
2170                                  IB_ACCESS_LOCAL_WRITE |
2171                                  IB_ACCESS_REMOTE_WRITE |
2172                                  IB_ACCESS_REMOTE_READ);
2173         if (err)
2174                 return err;
2175
2176         err = ib_check_mr_access(&dev->ib_dev, access);
2177         if (err)
2178                 return err;
2179
2180         obj->umem = ib_umem_get(&dev->ib_dev, addr, size, access);
2181         if (IS_ERR(obj->umem))
2182                 return PTR_ERR(obj->umem);
2183         return 0;
2184 }
2185
2186 static int devx_umem_reg_cmd_alloc(struct mlx5_ib_dev *dev,
2187                                    struct uverbs_attr_bundle *attrs,
2188                                    struct devx_umem *obj,
2189                                    struct devx_umem_reg_cmd *cmd)
2190 {
2191         unsigned int page_size;
2192         __be64 *mtt;
2193         void *umem;
2194
2195         /*
2196          * We don't know what the user intends to use this umem for, but the HW
2197          * restrictions must be met. MR, doorbell records, QP, WQ and CQ all
2198          * have different requirements. Since we have no idea how to sort this
2199          * out, only support PAGE_SIZE with the expectation that userspace will
2200          * provide the necessary alignments inside the known PAGE_SIZE and that
2201          * FW will check everything.
2202          */
2203         page_size = ib_umem_find_best_pgoff(
2204                 obj->umem, PAGE_SIZE,
2205                 __mlx5_page_offset_to_bitmask(__mlx5_bit_sz(umem, page_offset),
2206                                               0));
2207         if (!page_size)
2208                 return -EINVAL;
2209
2210         cmd->inlen = MLX5_ST_SZ_BYTES(create_umem_in) +
2211                      (MLX5_ST_SZ_BYTES(mtt) *
2212                       ib_umem_num_dma_blocks(obj->umem, page_size));
2213         cmd->in = uverbs_zalloc(attrs, cmd->inlen);
2214         if (IS_ERR(cmd->in))
2215                 return PTR_ERR(cmd->in);
2216
2217         umem = MLX5_ADDR_OF(create_umem_in, cmd->in, umem);
2218         mtt = (__be64 *)MLX5_ADDR_OF(umem, umem, mtt);
2219
2220         MLX5_SET(create_umem_in, cmd->in, opcode, MLX5_CMD_OP_CREATE_UMEM);
2221         MLX5_SET64(umem, umem, num_of_mtt,
2222                    ib_umem_num_dma_blocks(obj->umem, page_size));
2223         MLX5_SET(umem, umem, log_page_size,
2224                  order_base_2(page_size) - MLX5_ADAPTER_PAGE_SHIFT);
2225         MLX5_SET(umem, umem, page_offset,
2226                  ib_umem_dma_offset(obj->umem, page_size));
2227
2228         mlx5_ib_populate_pas(obj->umem, page_size, mtt,
2229                              (obj->umem->writable ? MLX5_IB_MTT_WRITE : 0) |
2230                                      MLX5_IB_MTT_READ);
2231         return 0;
2232 }
2233
2234 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_UMEM_REG)(
2235         struct uverbs_attr_bundle *attrs)
2236 {
2237         struct devx_umem_reg_cmd cmd;
2238         struct devx_umem *obj;
2239         struct ib_uobject *uobj = uverbs_attr_get_uobject(
2240                 attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE);
2241         u32 obj_id;
2242         struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
2243                 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
2244         struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
2245         int err;
2246
2247         if (!c->devx_uid)
2248                 return -EINVAL;
2249
2250         obj = kzalloc(sizeof(struct devx_umem), GFP_KERNEL);
2251         if (!obj)
2252                 return -ENOMEM;
2253
2254         err = devx_umem_get(dev, &c->ibucontext, attrs, obj);
2255         if (err)
2256                 goto err_obj_free;
2257
2258         err = devx_umem_reg_cmd_alloc(dev, attrs, obj, &cmd);
2259         if (err)
2260                 goto err_umem_release;
2261
2262         MLX5_SET(create_umem_in, cmd.in, uid, c->devx_uid);
2263         err = mlx5_cmd_exec(dev->mdev, cmd.in, cmd.inlen, cmd.out,
2264                             sizeof(cmd.out));
2265         if (err)
2266                 goto err_umem_release;
2267
2268         obj->mdev = dev->mdev;
2269         uobj->object = obj;
2270         devx_obj_build_destroy_cmd(cmd.in, cmd.out, obj->dinbox, &obj->dinlen, &obj_id);
2271         uverbs_finalize_uobj_create(attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE);
2272
2273         err = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_OUT_ID, &obj_id,
2274                              sizeof(obj_id));
2275         return err;
2276
2277 err_umem_release:
2278         ib_umem_release(obj->umem);
2279 err_obj_free:
2280         kfree(obj);
2281         return err;
2282 }
2283
2284 static int devx_umem_cleanup(struct ib_uobject *uobject,
2285                              enum rdma_remove_reason why,
2286                              struct uverbs_attr_bundle *attrs)
2287 {
2288         struct devx_umem *obj = uobject->object;
2289         u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
2290         int err;
2291
2292         err = mlx5_cmd_exec(obj->mdev, obj->dinbox, obj->dinlen, out, sizeof(out));
2293         if (err)
2294                 return err;
2295
2296         ib_umem_release(obj->umem);
2297         kfree(obj);
2298         return 0;
2299 }
2300
2301 static bool is_unaffiliated_event(struct mlx5_core_dev *dev,
2302                                   unsigned long event_type)
2303 {
2304         __be64 *unaff_events;
2305         int mask_entry;
2306         int mask_bit;
2307
2308         if (!MLX5_CAP_GEN(dev, event_cap))
2309                 return is_legacy_unaffiliated_event_num(event_type);
2310
2311         unaff_events = MLX5_CAP_DEV_EVENT(dev,
2312                                           user_unaffiliated_events);
2313         WARN_ON(event_type > MAX_SUPP_EVENT_NUM);
2314
2315         mask_entry = event_type / 64;
2316         mask_bit = event_type % 64;
2317
2318         if (!(be64_to_cpu(unaff_events[mask_entry]) & (1ull << mask_bit)))
2319                 return false;
2320
2321         return true;
2322 }
2323
2324 static u32 devx_get_obj_id_from_event(unsigned long event_type, void *data)
2325 {
2326         struct mlx5_eqe *eqe = data;
2327         u32 obj_id = 0;
2328
2329         switch (event_type) {
2330         case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR:
2331         case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT:
2332         case MLX5_EVENT_TYPE_PATH_MIG:
2333         case MLX5_EVENT_TYPE_COMM_EST:
2334         case MLX5_EVENT_TYPE_SQ_DRAINED:
2335         case MLX5_EVENT_TYPE_SRQ_LAST_WQE:
2336         case MLX5_EVENT_TYPE_WQ_CATAS_ERROR:
2337         case MLX5_EVENT_TYPE_PATH_MIG_FAILED:
2338         case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
2339         case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR:
2340                 obj_id = be32_to_cpu(eqe->data.qp_srq.qp_srq_n) & 0xffffff;
2341                 break;
2342         case MLX5_EVENT_TYPE_XRQ_ERROR:
2343                 obj_id = be32_to_cpu(eqe->data.xrq_err.type_xrqn) & 0xffffff;
2344                 break;
2345         case MLX5_EVENT_TYPE_DCT_DRAINED:
2346         case MLX5_EVENT_TYPE_DCT_KEY_VIOLATION:
2347                 obj_id = be32_to_cpu(eqe->data.dct.dctn) & 0xffffff;
2348                 break;
2349         case MLX5_EVENT_TYPE_CQ_ERROR:
2350                 obj_id = be32_to_cpu(eqe->data.cq_err.cqn) & 0xffffff;
2351                 break;
2352         default:
2353                 obj_id = MLX5_GET(affiliated_event_header, &eqe->data, obj_id);
2354                 break;
2355         }
2356
2357         return obj_id;
2358 }
2359
2360 static int deliver_event(struct devx_event_subscription *event_sub,
2361                          const void *data)
2362 {
2363         struct devx_async_event_file *ev_file;
2364         struct devx_async_event_data *event_data;
2365         unsigned long flags;
2366
2367         ev_file = event_sub->ev_file;
2368
2369         if (ev_file->omit_data) {
2370                 spin_lock_irqsave(&ev_file->lock, flags);
2371                 if (!list_empty(&event_sub->event_list) ||
2372                     ev_file->is_destroyed) {
2373                         spin_unlock_irqrestore(&ev_file->lock, flags);
2374                         return 0;
2375                 }
2376
2377                 list_add_tail(&event_sub->event_list, &ev_file->event_list);
2378                 spin_unlock_irqrestore(&ev_file->lock, flags);
2379                 wake_up_interruptible(&ev_file->poll_wait);
2380                 return 0;
2381         }
2382
2383         event_data = kzalloc(sizeof(*event_data) + sizeof(struct mlx5_eqe),
2384                              GFP_ATOMIC);
2385         if (!event_data) {
2386                 spin_lock_irqsave(&ev_file->lock, flags);
2387                 ev_file->is_overflow_err = 1;
2388                 spin_unlock_irqrestore(&ev_file->lock, flags);
2389                 return -ENOMEM;
2390         }
2391
2392         event_data->hdr.cookie = event_sub->cookie;
2393         memcpy(event_data->hdr.out_data, data, sizeof(struct mlx5_eqe));
2394
2395         spin_lock_irqsave(&ev_file->lock, flags);
2396         if (!ev_file->is_destroyed)
2397                 list_add_tail(&event_data->list, &ev_file->event_list);
2398         else
2399                 kfree(event_data);
2400         spin_unlock_irqrestore(&ev_file->lock, flags);
2401         wake_up_interruptible(&ev_file->poll_wait);
2402
2403         return 0;
2404 }
2405
2406 static void dispatch_event_fd(struct list_head *fd_list,
2407                               const void *data)
2408 {
2409         struct devx_event_subscription *item;
2410
2411         list_for_each_entry_rcu(item, fd_list, xa_list) {
2412                 if (item->eventfd)
2413                         eventfd_signal(item->eventfd, 1);
2414                 else
2415                         deliver_event(item, data);
2416         }
2417 }
2418
2419 static int devx_event_notifier(struct notifier_block *nb,
2420                                unsigned long event_type, void *data)
2421 {
2422         struct mlx5_devx_event_table *table;
2423         struct mlx5_ib_dev *dev;
2424         struct devx_event *event;
2425         struct devx_obj_event *obj_event;
2426         u16 obj_type = 0;
2427         bool is_unaffiliated;
2428         u32 obj_id;
2429
2430         /* Explicit filtering to kernel events which may occur frequently */
2431         if (event_type == MLX5_EVENT_TYPE_CMD ||
2432             event_type == MLX5_EVENT_TYPE_PAGE_REQUEST)
2433                 return NOTIFY_OK;
2434
2435         table = container_of(nb, struct mlx5_devx_event_table, devx_nb.nb);
2436         dev = container_of(table, struct mlx5_ib_dev, devx_event_table);
2437         is_unaffiliated = is_unaffiliated_event(dev->mdev, event_type);
2438
2439         if (!is_unaffiliated)
2440                 obj_type = get_event_obj_type(event_type, data);
2441
2442         rcu_read_lock();
2443         event = xa_load(&table->event_xa, event_type | (obj_type << 16));
2444         if (!event) {
2445                 rcu_read_unlock();
2446                 return NOTIFY_DONE;
2447         }
2448
2449         if (is_unaffiliated) {
2450                 dispatch_event_fd(&event->unaffiliated_list, data);
2451                 rcu_read_unlock();
2452                 return NOTIFY_OK;
2453         }
2454
2455         obj_id = devx_get_obj_id_from_event(event_type, data);
2456         obj_event = xa_load(&event->object_ids, obj_id);
2457         if (!obj_event) {
2458                 rcu_read_unlock();
2459                 return NOTIFY_DONE;
2460         }
2461
2462         dispatch_event_fd(&obj_event->obj_sub_list, data);
2463
2464         rcu_read_unlock();
2465         return NOTIFY_OK;
2466 }
2467
2468 int mlx5_ib_devx_init(struct mlx5_ib_dev *dev)
2469 {
2470         struct mlx5_devx_event_table *table = &dev->devx_event_table;
2471         int uid;
2472
2473         uid = mlx5_ib_devx_create(dev, false);
2474         if (uid > 0) {
2475                 dev->devx_whitelist_uid = uid;
2476                 xa_init(&table->event_xa);
2477                 mutex_init(&table->event_xa_lock);
2478                 MLX5_NB_INIT(&table->devx_nb, devx_event_notifier, NOTIFY_ANY);
2479                 mlx5_eq_notifier_register(dev->mdev, &table->devx_nb);
2480         }
2481
2482         return 0;
2483 }
2484
2485 void mlx5_ib_devx_cleanup(struct mlx5_ib_dev *dev)
2486 {
2487         struct mlx5_devx_event_table *table = &dev->devx_event_table;
2488         struct devx_event_subscription *sub, *tmp;
2489         struct devx_event *event;
2490         void *entry;
2491         unsigned long id;
2492
2493         if (dev->devx_whitelist_uid) {
2494                 mlx5_eq_notifier_unregister(dev->mdev, &table->devx_nb);
2495                 mutex_lock(&dev->devx_event_table.event_xa_lock);
2496                 xa_for_each(&table->event_xa, id, entry) {
2497                         event = entry;
2498                         list_for_each_entry_safe(
2499                                 sub, tmp, &event->unaffiliated_list, xa_list)
2500                                 devx_cleanup_subscription(dev, sub);
2501                         kfree(entry);
2502                 }
2503                 mutex_unlock(&dev->devx_event_table.event_xa_lock);
2504                 xa_destroy(&table->event_xa);
2505
2506                 mlx5_ib_devx_destroy(dev, dev->devx_whitelist_uid);
2507         }
2508 }
2509
2510 static ssize_t devx_async_cmd_event_read(struct file *filp, char __user *buf,
2511                                          size_t count, loff_t *pos)
2512 {
2513         struct devx_async_cmd_event_file *comp_ev_file = filp->private_data;
2514         struct devx_async_event_queue *ev_queue = &comp_ev_file->ev_queue;
2515         struct devx_async_data *event;
2516         int ret = 0;
2517         size_t eventsz;
2518
2519         spin_lock_irq(&ev_queue->lock);
2520
2521         while (list_empty(&ev_queue->event_list)) {
2522                 spin_unlock_irq(&ev_queue->lock);
2523
2524                 if (filp->f_flags & O_NONBLOCK)
2525                         return -EAGAIN;
2526
2527                 if (wait_event_interruptible(
2528                             ev_queue->poll_wait,
2529                             (!list_empty(&ev_queue->event_list) ||
2530                              ev_queue->is_destroyed))) {
2531                         return -ERESTARTSYS;
2532                 }
2533
2534                 spin_lock_irq(&ev_queue->lock);
2535                 if (ev_queue->is_destroyed) {
2536                         spin_unlock_irq(&ev_queue->lock);
2537                         return -EIO;
2538                 }
2539         }
2540
2541         event = list_entry(ev_queue->event_list.next,
2542                            struct devx_async_data, list);
2543         eventsz = event->cmd_out_len +
2544                         sizeof(struct mlx5_ib_uapi_devx_async_cmd_hdr);
2545
2546         if (eventsz > count) {
2547                 spin_unlock_irq(&ev_queue->lock);
2548                 return -ENOSPC;
2549         }
2550
2551         list_del(ev_queue->event_list.next);
2552         spin_unlock_irq(&ev_queue->lock);
2553
2554         if (copy_to_user(buf, &event->hdr, eventsz))
2555                 ret = -EFAULT;
2556         else
2557                 ret = eventsz;
2558
2559         atomic_sub(event->cmd_out_len, &ev_queue->bytes_in_use);
2560         kvfree(event);
2561         return ret;
2562 }
2563
2564 static __poll_t devx_async_cmd_event_poll(struct file *filp,
2565                                               struct poll_table_struct *wait)
2566 {
2567         struct devx_async_cmd_event_file *comp_ev_file = filp->private_data;
2568         struct devx_async_event_queue *ev_queue = &comp_ev_file->ev_queue;
2569         __poll_t pollflags = 0;
2570
2571         poll_wait(filp, &ev_queue->poll_wait, wait);
2572
2573         spin_lock_irq(&ev_queue->lock);
2574         if (ev_queue->is_destroyed)
2575                 pollflags = EPOLLIN | EPOLLRDNORM | EPOLLRDHUP;
2576         else if (!list_empty(&ev_queue->event_list))
2577                 pollflags = EPOLLIN | EPOLLRDNORM;
2578         spin_unlock_irq(&ev_queue->lock);
2579
2580         return pollflags;
2581 }
2582
2583 static const struct file_operations devx_async_cmd_event_fops = {
2584         .owner   = THIS_MODULE,
2585         .read    = devx_async_cmd_event_read,
2586         .poll    = devx_async_cmd_event_poll,
2587         .release = uverbs_uobject_fd_release,
2588         .llseek  = no_llseek,
2589 };
2590
2591 static ssize_t devx_async_event_read(struct file *filp, char __user *buf,
2592                                      size_t count, loff_t *pos)
2593 {
2594         struct devx_async_event_file *ev_file = filp->private_data;
2595         struct devx_event_subscription *event_sub;
2596         struct devx_async_event_data *event;
2597         int ret = 0;
2598         size_t eventsz;
2599         bool omit_data;
2600         void *event_data;
2601
2602         omit_data = ev_file->omit_data;
2603
2604         spin_lock_irq(&ev_file->lock);
2605
2606         if (ev_file->is_overflow_err) {
2607                 ev_file->is_overflow_err = 0;
2608                 spin_unlock_irq(&ev_file->lock);
2609                 return -EOVERFLOW;
2610         }
2611
2612
2613         while (list_empty(&ev_file->event_list)) {
2614                 spin_unlock_irq(&ev_file->lock);
2615
2616                 if (filp->f_flags & O_NONBLOCK)
2617                         return -EAGAIN;
2618
2619                 if (wait_event_interruptible(ev_file->poll_wait,
2620                             (!list_empty(&ev_file->event_list) ||
2621                              ev_file->is_destroyed))) {
2622                         return -ERESTARTSYS;
2623                 }
2624
2625                 spin_lock_irq(&ev_file->lock);
2626                 if (ev_file->is_destroyed) {
2627                         spin_unlock_irq(&ev_file->lock);
2628                         return -EIO;
2629                 }
2630         }
2631
2632         if (omit_data) {
2633                 event_sub = list_first_entry(&ev_file->event_list,
2634                                         struct devx_event_subscription,
2635                                         event_list);
2636                 eventsz = sizeof(event_sub->cookie);
2637                 event_data = &event_sub->cookie;
2638         } else {
2639                 event = list_first_entry(&ev_file->event_list,
2640                                       struct devx_async_event_data, list);
2641                 eventsz = sizeof(struct mlx5_eqe) +
2642                         sizeof(struct mlx5_ib_uapi_devx_async_event_hdr);
2643                 event_data = &event->hdr;
2644         }
2645
2646         if (eventsz > count) {
2647                 spin_unlock_irq(&ev_file->lock);
2648                 return -EINVAL;
2649         }
2650
2651         if (omit_data)
2652                 list_del_init(&event_sub->event_list);
2653         else
2654                 list_del(&event->list);
2655
2656         spin_unlock_irq(&ev_file->lock);
2657
2658         if (copy_to_user(buf, event_data, eventsz))
2659                 /* This points to an application issue, not a kernel concern */
2660                 ret = -EFAULT;
2661         else
2662                 ret = eventsz;
2663
2664         if (!omit_data)
2665                 kfree(event);
2666         return ret;
2667 }
2668
2669 static __poll_t devx_async_event_poll(struct file *filp,
2670                                       struct poll_table_struct *wait)
2671 {
2672         struct devx_async_event_file *ev_file = filp->private_data;
2673         __poll_t pollflags = 0;
2674
2675         poll_wait(filp, &ev_file->poll_wait, wait);
2676
2677         spin_lock_irq(&ev_file->lock);
2678         if (ev_file->is_destroyed)
2679                 pollflags = EPOLLIN | EPOLLRDNORM | EPOLLRDHUP;
2680         else if (!list_empty(&ev_file->event_list))
2681                 pollflags = EPOLLIN | EPOLLRDNORM;
2682         spin_unlock_irq(&ev_file->lock);
2683
2684         return pollflags;
2685 }
2686
2687 static void devx_free_subscription(struct rcu_head *rcu)
2688 {
2689         struct devx_event_subscription *event_sub =
2690                 container_of(rcu, struct devx_event_subscription, rcu);
2691
2692         if (event_sub->eventfd)
2693                 eventfd_ctx_put(event_sub->eventfd);
2694         uverbs_uobject_put(&event_sub->ev_file->uobj);
2695         kfree(event_sub);
2696 }
2697
2698 static const struct file_operations devx_async_event_fops = {
2699         .owner   = THIS_MODULE,
2700         .read    = devx_async_event_read,
2701         .poll    = devx_async_event_poll,
2702         .release = uverbs_uobject_fd_release,
2703         .llseek  = no_llseek,
2704 };
2705
2706 static void devx_async_cmd_event_destroy_uobj(struct ib_uobject *uobj,
2707                                               enum rdma_remove_reason why)
2708 {
2709         struct devx_async_cmd_event_file *comp_ev_file =
2710                 container_of(uobj, struct devx_async_cmd_event_file,
2711                              uobj);
2712         struct devx_async_event_queue *ev_queue = &comp_ev_file->ev_queue;
2713         struct devx_async_data *entry, *tmp;
2714
2715         spin_lock_irq(&ev_queue->lock);
2716         ev_queue->is_destroyed = 1;
2717         spin_unlock_irq(&ev_queue->lock);
2718         wake_up_interruptible(&ev_queue->poll_wait);
2719
2720         mlx5_cmd_cleanup_async_ctx(&comp_ev_file->async_ctx);
2721
2722         spin_lock_irq(&comp_ev_file->ev_queue.lock);
2723         list_for_each_entry_safe(entry, tmp,
2724                                  &comp_ev_file->ev_queue.event_list, list) {
2725                 list_del(&entry->list);
2726                 kvfree(entry);
2727         }
2728         spin_unlock_irq(&comp_ev_file->ev_queue.lock);
2729 };
2730
2731 static void devx_async_event_destroy_uobj(struct ib_uobject *uobj,
2732                                           enum rdma_remove_reason why)
2733 {
2734         struct devx_async_event_file *ev_file =
2735                 container_of(uobj, struct devx_async_event_file,
2736                              uobj);
2737         struct devx_event_subscription *event_sub, *event_sub_tmp;
2738         struct mlx5_ib_dev *dev = ev_file->dev;
2739
2740         spin_lock_irq(&ev_file->lock);
2741         ev_file->is_destroyed = 1;
2742
2743         /* free the pending events allocation */
2744         if (ev_file->omit_data) {
2745                 struct devx_event_subscription *event_sub, *tmp;
2746
2747                 list_for_each_entry_safe(event_sub, tmp, &ev_file->event_list,
2748                                          event_list)
2749                         list_del_init(&event_sub->event_list);
2750
2751         } else {
2752                 struct devx_async_event_data *entry, *tmp;
2753
2754                 list_for_each_entry_safe(entry, tmp, &ev_file->event_list,
2755                                          list) {
2756                         list_del(&entry->list);
2757                         kfree(entry);
2758                 }
2759         }
2760
2761         spin_unlock_irq(&ev_file->lock);
2762         wake_up_interruptible(&ev_file->poll_wait);
2763
2764         mutex_lock(&dev->devx_event_table.event_xa_lock);
2765         /* delete the subscriptions which are related to this FD */
2766         list_for_each_entry_safe(event_sub, event_sub_tmp,
2767                                  &ev_file->subscribed_events_list, file_list) {
2768                 devx_cleanup_subscription(dev, event_sub);
2769                 list_del_rcu(&event_sub->file_list);
2770                 /* subscription may not be used by the read API any more */
2771                 call_rcu(&event_sub->rcu, devx_free_subscription);
2772         }
2773         mutex_unlock(&dev->devx_event_table.event_xa_lock);
2774
2775         put_device(&dev->ib_dev.dev);
2776 };
2777
2778 DECLARE_UVERBS_NAMED_METHOD(
2779         MLX5_IB_METHOD_DEVX_UMEM_REG,
2780         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE,
2781                         MLX5_IB_OBJECT_DEVX_UMEM,
2782                         UVERBS_ACCESS_NEW,
2783                         UA_MANDATORY),
2784         UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_ADDR,
2785                            UVERBS_ATTR_TYPE(u64),
2786                            UA_MANDATORY),
2787         UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_LEN,
2788                            UVERBS_ATTR_TYPE(u64),
2789                            UA_MANDATORY),
2790         UVERBS_ATTR_FLAGS_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_ACCESS,
2791                              enum ib_access_flags),
2792         UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_DEVX_UMEM_REG_OUT_ID,
2793                             UVERBS_ATTR_TYPE(u32),
2794                             UA_MANDATORY));
2795
2796 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
2797         MLX5_IB_METHOD_DEVX_UMEM_DEREG,
2798         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_UMEM_DEREG_HANDLE,
2799                         MLX5_IB_OBJECT_DEVX_UMEM,
2800                         UVERBS_ACCESS_DESTROY,
2801                         UA_MANDATORY));
2802
2803 DECLARE_UVERBS_NAMED_METHOD(
2804         MLX5_IB_METHOD_DEVX_QUERY_EQN,
2805         UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_QUERY_EQN_USER_VEC,
2806                            UVERBS_ATTR_TYPE(u32),
2807                            UA_MANDATORY),
2808         UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_DEVX_QUERY_EQN_DEV_EQN,
2809                             UVERBS_ATTR_TYPE(u32),
2810                             UA_MANDATORY));
2811
2812 DECLARE_UVERBS_NAMED_METHOD(
2813         MLX5_IB_METHOD_DEVX_QUERY_UAR,
2814         UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_QUERY_UAR_USER_IDX,
2815                            UVERBS_ATTR_TYPE(u32),
2816                            UA_MANDATORY),
2817         UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_DEVX_QUERY_UAR_DEV_IDX,
2818                             UVERBS_ATTR_TYPE(u32),
2819                             UA_MANDATORY));
2820
2821 DECLARE_UVERBS_NAMED_METHOD(
2822         MLX5_IB_METHOD_DEVX_OTHER,
2823         UVERBS_ATTR_PTR_IN(
2824                 MLX5_IB_ATTR_DEVX_OTHER_CMD_IN,
2825                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2826                 UA_MANDATORY,
2827                 UA_ALLOC_AND_COPY),
2828         UVERBS_ATTR_PTR_OUT(
2829                 MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT,
2830                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
2831                 UA_MANDATORY));
2832
2833 DECLARE_UVERBS_NAMED_METHOD(
2834         MLX5_IB_METHOD_DEVX_OBJ_CREATE,
2835         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_CREATE_HANDLE,
2836                         MLX5_IB_OBJECT_DEVX_OBJ,
2837                         UVERBS_ACCESS_NEW,
2838                         UA_MANDATORY),
2839         UVERBS_ATTR_PTR_IN(
2840                 MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN,
2841                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2842                 UA_MANDATORY,
2843                 UA_ALLOC_AND_COPY),
2844         UVERBS_ATTR_PTR_OUT(
2845                 MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT,
2846                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
2847                 UA_MANDATORY));
2848
2849 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
2850         MLX5_IB_METHOD_DEVX_OBJ_DESTROY,
2851         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_DESTROY_HANDLE,
2852                         MLX5_IB_OBJECT_DEVX_OBJ,
2853                         UVERBS_ACCESS_DESTROY,
2854                         UA_MANDATORY));
2855
2856 DECLARE_UVERBS_NAMED_METHOD(
2857         MLX5_IB_METHOD_DEVX_OBJ_MODIFY,
2858         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_MODIFY_HANDLE,
2859                         UVERBS_IDR_ANY_OBJECT,
2860                         UVERBS_ACCESS_WRITE,
2861                         UA_MANDATORY),
2862         UVERBS_ATTR_PTR_IN(
2863                 MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN,
2864                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2865                 UA_MANDATORY,
2866                 UA_ALLOC_AND_COPY),
2867         UVERBS_ATTR_PTR_OUT(
2868                 MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT,
2869                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
2870                 UA_MANDATORY));
2871
2872 DECLARE_UVERBS_NAMED_METHOD(
2873         MLX5_IB_METHOD_DEVX_OBJ_QUERY,
2874         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_QUERY_HANDLE,
2875                         UVERBS_IDR_ANY_OBJECT,
2876                         UVERBS_ACCESS_READ,
2877                         UA_MANDATORY),
2878         UVERBS_ATTR_PTR_IN(
2879                 MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN,
2880                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2881                 UA_MANDATORY,
2882                 UA_ALLOC_AND_COPY),
2883         UVERBS_ATTR_PTR_OUT(
2884                 MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT,
2885                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
2886                 UA_MANDATORY));
2887
2888 DECLARE_UVERBS_NAMED_METHOD(
2889         MLX5_IB_METHOD_DEVX_OBJ_ASYNC_QUERY,
2890         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_QUERY_HANDLE,
2891                         UVERBS_IDR_ANY_OBJECT,
2892                         UVERBS_ACCESS_READ,
2893                         UA_MANDATORY),
2894         UVERBS_ATTR_PTR_IN(
2895                 MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN,
2896                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2897                 UA_MANDATORY,
2898                 UA_ALLOC_AND_COPY),
2899         UVERBS_ATTR_CONST_IN(MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_OUT_LEN,
2900                 u16, UA_MANDATORY),
2901         UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_FD,
2902                 MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
2903                 UVERBS_ACCESS_READ,
2904                 UA_MANDATORY),
2905         UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_WR_ID,
2906                 UVERBS_ATTR_TYPE(u64),
2907                 UA_MANDATORY));
2908
2909 DECLARE_UVERBS_NAMED_METHOD(
2910         MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT,
2911         UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_HANDLE,
2912                 MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
2913                 UVERBS_ACCESS_READ,
2914                 UA_MANDATORY),
2915         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_OBJ_HANDLE,
2916                 MLX5_IB_OBJECT_DEVX_OBJ,
2917                 UVERBS_ACCESS_READ,
2918                 UA_OPTIONAL),
2919         UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_TYPE_NUM_LIST,
2920                 UVERBS_ATTR_MIN_SIZE(sizeof(u16)),
2921                 UA_MANDATORY,
2922                 UA_ALLOC_AND_COPY),
2923         UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_COOKIE,
2924                 UVERBS_ATTR_TYPE(u64),
2925                 UA_OPTIONAL),
2926         UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_NUM,
2927                 UVERBS_ATTR_TYPE(u32),
2928                 UA_OPTIONAL));
2929
2930 DECLARE_UVERBS_GLOBAL_METHODS(MLX5_IB_OBJECT_DEVX,
2931                               &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OTHER),
2932                               &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_QUERY_UAR),
2933                               &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_QUERY_EQN),
2934                               &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT));
2935
2936 DECLARE_UVERBS_NAMED_OBJECT(MLX5_IB_OBJECT_DEVX_OBJ,
2937                             UVERBS_TYPE_ALLOC_IDR(devx_obj_cleanup),
2938                             &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_CREATE),
2939                             &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_DESTROY),
2940                             &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_MODIFY),
2941                             &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_QUERY),
2942                             &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_ASYNC_QUERY));
2943
2944 DECLARE_UVERBS_NAMED_OBJECT(MLX5_IB_OBJECT_DEVX_UMEM,
2945                             UVERBS_TYPE_ALLOC_IDR(devx_umem_cleanup),
2946                             &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_UMEM_REG),
2947                             &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_UMEM_DEREG));
2948
2949
2950 DECLARE_UVERBS_NAMED_METHOD(
2951         MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC,
2952         UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_ASYNC_CMD_FD_ALLOC_HANDLE,
2953                         MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
2954                         UVERBS_ACCESS_NEW,
2955                         UA_MANDATORY));
2956
2957 DECLARE_UVERBS_NAMED_OBJECT(
2958         MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
2959         UVERBS_TYPE_ALLOC_FD(sizeof(struct devx_async_cmd_event_file),
2960                              devx_async_cmd_event_destroy_uobj,
2961                              &devx_async_cmd_event_fops, "[devx_async_cmd]",
2962                              O_RDONLY),
2963         &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC));
2964
2965 DECLARE_UVERBS_NAMED_METHOD(
2966         MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC,
2967         UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_HANDLE,
2968                         MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
2969                         UVERBS_ACCESS_NEW,
2970                         UA_MANDATORY),
2971         UVERBS_ATTR_FLAGS_IN(MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_FLAGS,
2972                         enum mlx5_ib_uapi_devx_create_event_channel_flags,
2973                         UA_MANDATORY));
2974
2975 DECLARE_UVERBS_NAMED_OBJECT(
2976         MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
2977         UVERBS_TYPE_ALLOC_FD(sizeof(struct devx_async_event_file),
2978                              devx_async_event_destroy_uobj,
2979                              &devx_async_event_fops, "[devx_async_event]",
2980                              O_RDONLY),
2981         &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC));
2982
2983 static bool devx_is_supported(struct ib_device *device)
2984 {
2985         struct mlx5_ib_dev *dev = to_mdev(device);
2986
2987         return MLX5_CAP_GEN(dev->mdev, log_max_uctx);
2988 }
2989
2990 const struct uapi_definition mlx5_ib_devx_defs[] = {
2991         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
2992                 MLX5_IB_OBJECT_DEVX,
2993                 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
2994         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
2995                 MLX5_IB_OBJECT_DEVX_OBJ,
2996                 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
2997         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
2998                 MLX5_IB_OBJECT_DEVX_UMEM,
2999                 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
3000         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
3001                 MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
3002                 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
3003         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
3004                 MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
3005                 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
3006         {},
3007 };