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(general_obj_in_cmd_hdr)];
  98 };
  99
 100 struct devx_umem_reg_cmd {
 101         void                            *in;
 102         u32                             inlen;
 103         u32                             out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
 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)] = {0};
 115         u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)] = {0};
 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(general_obj_out_cmd_hdr, out, obj_id);
 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)] = {0};
 148         u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)] = {0};
 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 u64 devx_get_obj_id(const void *in)
 292 {
 293         u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
 294         u64 obj_id;
 295
 296         switch (opcode) {
 297         case MLX5_CMD_OP_MODIFY_GENERAL_OBJECT:
 298         case MLX5_CMD_OP_QUERY_GENERAL_OBJECT:
 299                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_GENERAL_OBJECT |
 300                                         MLX5_GET(general_obj_in_cmd_hdr, in,
 301                                                  obj_type) << 16,
 302                                         MLX5_GET(general_obj_in_cmd_hdr, in,
 303                                                  obj_id));
 304                 break;
 305         case MLX5_CMD_OP_QUERY_MKEY:
 306                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_MKEY,
 307                                         MLX5_GET(query_mkey_in, in,
 308                                                  mkey_index));
 309                 break;
 310         case MLX5_CMD_OP_QUERY_CQ:
 311                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_CQ,
 312                                         MLX5_GET(query_cq_in, in, cqn));
 313                 break;
 314         case MLX5_CMD_OP_MODIFY_CQ:
 315                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_CQ,
 316                                         MLX5_GET(modify_cq_in, in, cqn));
 317                 break;
 318         case MLX5_CMD_OP_QUERY_SQ:
 319                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SQ,
 320                                         MLX5_GET(query_sq_in, in, sqn));
 321                 break;
 322         case MLX5_CMD_OP_MODIFY_SQ:
 323                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SQ,
 324                                         MLX5_GET(modify_sq_in, in, sqn));
 325                 break;
 326         case MLX5_CMD_OP_QUERY_RQ:
 327                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ,
 328                                         MLX5_GET(query_rq_in, in, rqn));
 329                 break;
 330         case MLX5_CMD_OP_MODIFY_RQ:
 331                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ,
 332                                         MLX5_GET(modify_rq_in, in, rqn));
 333                 break;
 334         case MLX5_CMD_OP_QUERY_RMP:
 335                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RMP,
 336                                         MLX5_GET(query_rmp_in, in, rmpn));
 337                 break;
 338         case MLX5_CMD_OP_MODIFY_RMP:
 339                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RMP,
 340                                         MLX5_GET(modify_rmp_in, in, rmpn));
 341                 break;
 342         case MLX5_CMD_OP_QUERY_RQT:
 343                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQT,
 344                                         MLX5_GET(query_rqt_in, in, rqtn));
 345                 break;
 346         case MLX5_CMD_OP_MODIFY_RQT:
 347                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQT,
 348                                         MLX5_GET(modify_rqt_in, in, rqtn));
 349                 break;
 350         case MLX5_CMD_OP_QUERY_TIR:
 351                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_TIR,
 352                                         MLX5_GET(query_tir_in, in, tirn));
 353                 break;
 354         case MLX5_CMD_OP_MODIFY_TIR:
 355                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_TIR,
 356                                         MLX5_GET(modify_tir_in, in, tirn));
 357                 break;
 358         case MLX5_CMD_OP_QUERY_TIS:
 359                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_TIS,
 360                                         MLX5_GET(query_tis_in, in, tisn));
 361                 break;
 362         case MLX5_CMD_OP_MODIFY_TIS:
 363                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_TIS,
 364                                         MLX5_GET(modify_tis_in, in, tisn));
 365                 break;
 366         case MLX5_CMD_OP_QUERY_FLOW_TABLE:
 367                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_FLOW_TABLE,
 368                                         MLX5_GET(query_flow_table_in, in,
 369                                                  table_id));
 370                 break;
 371         case MLX5_CMD_OP_MODIFY_FLOW_TABLE:
 372                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_FLOW_TABLE,
 373                                         MLX5_GET(modify_flow_table_in, in,
 374                                                  table_id));
 375                 break;
 376         case MLX5_CMD_OP_QUERY_FLOW_GROUP:
 377                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_FLOW_GROUP,
 378                                         MLX5_GET(query_flow_group_in, in,
 379                                                  group_id));
 380                 break;
 381         case MLX5_CMD_OP_QUERY_FLOW_TABLE_ENTRY:
 382                 obj_id = get_enc_obj_id(MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY,
 383                                         MLX5_GET(query_fte_in, in,
 384                                                  flow_index));
 385                 break;
 386         case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
 387                 obj_id = get_enc_obj_id(MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY,
 388                                         MLX5_GET(set_fte_in, in, flow_index));
 389                 break;
 390         case MLX5_CMD_OP_QUERY_Q_COUNTER:
 391                 obj_id = get_enc_obj_id(MLX5_CMD_OP_ALLOC_Q_COUNTER,
 392                                         MLX5_GET(query_q_counter_in, in,
 393                                                  counter_set_id));
 394                 break;
 395         case MLX5_CMD_OP_QUERY_FLOW_COUNTER:
 396                 obj_id = get_enc_obj_id(MLX5_CMD_OP_ALLOC_FLOW_COUNTER,
 397                                         MLX5_GET(query_flow_counter_in, in,
 398                                                  flow_counter_id));
 399                 break;
 400         case MLX5_CMD_OP_QUERY_MODIFY_HEADER_CONTEXT:
 401                 obj_id = get_enc_obj_id(MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT,
 402                                         MLX5_GET(general_obj_in_cmd_hdr, in,
 403                                                  obj_id));
 404                 break;
 405         case MLX5_CMD_OP_QUERY_SCHEDULING_ELEMENT:
 406                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT,
 407                                         MLX5_GET(query_scheduling_element_in,
 408                                                  in, scheduling_element_id));
 409                 break;
 410         case MLX5_CMD_OP_MODIFY_SCHEDULING_ELEMENT:
 411                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT,
 412                                         MLX5_GET(modify_scheduling_element_in,
 413                                                  in, scheduling_element_id));
 414                 break;
 415         case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
 416                 obj_id = get_enc_obj_id(MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT,
 417                                         MLX5_GET(add_vxlan_udp_dport_in, in,
 418                                                  vxlan_udp_port));
 419                 break;
 420         case MLX5_CMD_OP_QUERY_L2_TABLE_ENTRY:
 421                 obj_id = get_enc_obj_id(MLX5_CMD_OP_SET_L2_TABLE_ENTRY,
 422                                         MLX5_GET(query_l2_table_entry_in, in,
 423                                                  table_index));
 424                 break;
 425         case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
 426                 obj_id = get_enc_obj_id(MLX5_CMD_OP_SET_L2_TABLE_ENTRY,
 427                                         MLX5_GET(set_l2_table_entry_in, in,
 428                                                  table_index));
 429                 break;
 430         case MLX5_CMD_OP_QUERY_QP:
 431                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
 432                                         MLX5_GET(query_qp_in, in, qpn));
 433                 break;
 434         case MLX5_CMD_OP_RST2INIT_QP:
 435                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
 436                                         MLX5_GET(rst2init_qp_in, in, qpn));
 437                 break;
 438         case MLX5_CMD_OP_INIT2INIT_QP:
 439                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
 440                                         MLX5_GET(init2init_qp_in, in, qpn));
 441                 break;
 442         case MLX5_CMD_OP_INIT2RTR_QP:
 443                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
 444                                         MLX5_GET(init2rtr_qp_in, in, qpn));
 445                 break;
 446         case MLX5_CMD_OP_RTR2RTS_QP:
 447                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
 448                                         MLX5_GET(rtr2rts_qp_in, in, qpn));
 449                 break;
 450         case MLX5_CMD_OP_RTS2RTS_QP:
 451                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
 452                                         MLX5_GET(rts2rts_qp_in, in, qpn));
 453                 break;
 454         case MLX5_CMD_OP_SQERR2RTS_QP:
 455                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
 456                                         MLX5_GET(sqerr2rts_qp_in, in, qpn));
 457                 break;
 458         case MLX5_CMD_OP_2ERR_QP:
 459                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
 460                                         MLX5_GET(qp_2err_in, in, qpn));
 461                 break;
 462         case MLX5_CMD_OP_2RST_QP:
 463                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
 464                                         MLX5_GET(qp_2rst_in, in, qpn));
 465                 break;
 466         case MLX5_CMD_OP_QUERY_DCT:
 467                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_DCT,
 468                                         MLX5_GET(query_dct_in, in, dctn));
 469                 break;
 470         case MLX5_CMD_OP_QUERY_XRQ:
 471         case MLX5_CMD_OP_QUERY_XRQ_DC_PARAMS_ENTRY:
 472         case MLX5_CMD_OP_QUERY_XRQ_ERROR_PARAMS:
 473                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_XRQ,
 474                                         MLX5_GET(query_xrq_in, in, xrqn));
 475                 break;
 476         case MLX5_CMD_OP_QUERY_XRC_SRQ:
 477                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_XRC_SRQ,
 478                                         MLX5_GET(query_xrc_srq_in, in,
 479                                                  xrc_srqn));
 480                 break;
 481         case MLX5_CMD_OP_ARM_XRC_SRQ:
 482                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_XRC_SRQ,
 483                                         MLX5_GET(arm_xrc_srq_in, in, xrc_srqn));
 484                 break;
 485         case MLX5_CMD_OP_QUERY_SRQ:
 486                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SRQ,
 487                                         MLX5_GET(query_srq_in, in, srqn));
 488                 break;
 489         case MLX5_CMD_OP_ARM_RQ:
 490                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ,
 491                                         MLX5_GET(arm_rq_in, in, srq_number));
 492                 break;
 493         case MLX5_CMD_OP_ARM_DCT_FOR_KEY_VIOLATION:
 494                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_DCT,
 495                                         MLX5_GET(drain_dct_in, in, dctn));
 496                 break;
 497         case MLX5_CMD_OP_ARM_XRQ:
 498         case MLX5_CMD_OP_SET_XRQ_DC_PARAMS_ENTRY:
 499         case MLX5_CMD_OP_RELEASE_XRQ_ERROR:
 500         case MLX5_CMD_OP_MODIFY_XRQ:
 501                 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_XRQ,
 502                                         MLX5_GET(arm_xrq_in, in, xrqn));
 503                 break;
 504         case MLX5_CMD_OP_QUERY_PACKET_REFORMAT_CONTEXT:
 505                 obj_id = get_enc_obj_id
 506                                 (MLX5_CMD_OP_ALLOC_PACKET_REFORMAT_CONTEXT,
 507                                  MLX5_GET(query_packet_reformat_context_in,
 508                                           in, packet_reformat_id));
 509                 break;
 510         default:
 511                 obj_id = 0;
 512         }
 513
 514         return obj_id;
 515 }
 516
 517 static bool devx_is_valid_obj_id(struct uverbs_attr_bundle *attrs,
 518                                  struct ib_uobject *uobj, const void *in)
 519 {
 520         struct mlx5_ib_dev *dev = mlx5_udata_to_mdev(&attrs->driver_udata);
 521         u64 obj_id = devx_get_obj_id(in);
 522
 523         if (!obj_id)
 524                 return false;
 525
 526         switch (uobj_get_object_id(uobj)) {
 527         case UVERBS_OBJECT_CQ:
 528                 return get_enc_obj_id(MLX5_CMD_OP_CREATE_CQ,
 529                                       to_mcq(uobj->object)->mcq.cqn) ==
 530                                       obj_id;
 531
 532         case UVERBS_OBJECT_SRQ:
 533         {
 534                 struct mlx5_core_srq *srq = &(to_msrq(uobj->object)->msrq);
 535                 u16 opcode;
 536
 537                 switch (srq->common.res) {
 538                 case MLX5_RES_XSRQ:
 539                         opcode = MLX5_CMD_OP_CREATE_XRC_SRQ;
 540                         break;
 541                 case MLX5_RES_XRQ:
 542                         opcode = MLX5_CMD_OP_CREATE_XRQ;
 543                         break;
 544                 default:
 545                         if (!dev->mdev->issi)
 546                                 opcode = MLX5_CMD_OP_CREATE_SRQ;
 547                         else
 548                                 opcode = MLX5_CMD_OP_CREATE_RMP;
 549                 }
 550
 551                 return get_enc_obj_id(opcode,
 552                                       to_msrq(uobj->object)->msrq.srqn) ==
 553                                       obj_id;
 554         }
 555
 556         case UVERBS_OBJECT_QP:
 557         {
 558                 struct mlx5_ib_qp *qp = to_mqp(uobj->object);
 559                 enum ib_qp_type qp_type = qp->ibqp.qp_type;
 560
 561                 if (qp_type == IB_QPT_RAW_PACKET ||
 562                     (qp->flags & IB_QP_CREATE_SOURCE_QPN)) {
 563                         struct mlx5_ib_raw_packet_qp *raw_packet_qp =
 564                                                          &qp->raw_packet_qp;
 565                         struct mlx5_ib_rq *rq = &raw_packet_qp->rq;
 566                         struct mlx5_ib_sq *sq = &raw_packet_qp->sq;
 567
 568                         return (get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ,
 569                                                rq->base.mqp.qpn) == obj_id ||
 570                                 get_enc_obj_id(MLX5_CMD_OP_CREATE_SQ,
 571                                                sq->base.mqp.qpn) == obj_id ||
 572                                 get_enc_obj_id(MLX5_CMD_OP_CREATE_TIR,
 573                                                rq->tirn) == obj_id ||
 574                                 get_enc_obj_id(MLX5_CMD_OP_CREATE_TIS,
 575                                                sq->tisn) == obj_id);
 576                 }
 577
 578                 if (qp_type == MLX5_IB_QPT_DCT)
 579                         return get_enc_obj_id(MLX5_CMD_OP_CREATE_DCT,
 580                                               qp->dct.mdct.mqp.qpn) == obj_id;
 581
 582                 return get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
 583                                       qp->ibqp.qp_num) == obj_id;
 584         }
 585
 586         case UVERBS_OBJECT_WQ:
 587                 return get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ,
 588                                       to_mrwq(uobj->object)->core_qp.qpn) ==
 589                                       obj_id;
 590
 591         case UVERBS_OBJECT_RWQ_IND_TBL:
 592                 return get_enc_obj_id(MLX5_CMD_OP_CREATE_RQT,
 593                                       to_mrwq_ind_table(uobj->object)->rqtn) ==
 594                                       obj_id;
 595
 596         case MLX5_IB_OBJECT_DEVX_OBJ:
 597                 return ((struct devx_obj *)uobj->object)->obj_id == obj_id;
 598
 599         default:
 600                 return false;
 601         }
 602 }
 603
 604 static void devx_set_umem_valid(const void *in)
 605 {
 606         u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
 607
 608         switch (opcode) {
 609         case MLX5_CMD_OP_CREATE_MKEY:
 610                 MLX5_SET(create_mkey_in, in, mkey_umem_valid, 1);
 611                 break;
 612         case MLX5_CMD_OP_CREATE_CQ:
 613         {
 614                 void *cqc;
 615
 616                 MLX5_SET(create_cq_in, in, cq_umem_valid, 1);
 617                 cqc = MLX5_ADDR_OF(create_cq_in, in, cq_context);
 618                 MLX5_SET(cqc, cqc, dbr_umem_valid, 1);
 619                 break;
 620         }
 621         case MLX5_CMD_OP_CREATE_QP:
 622         {
 623                 void *qpc;
 624
 625                 qpc = MLX5_ADDR_OF(create_qp_in, in, qpc);
 626                 MLX5_SET(qpc, qpc, dbr_umem_valid, 1);
 627                 MLX5_SET(create_qp_in, in, wq_umem_valid, 1);
 628                 break;
 629         }
 630
 631         case MLX5_CMD_OP_CREATE_RQ:
 632         {
 633                 void *rqc, *wq;
 634
 635                 rqc = MLX5_ADDR_OF(create_rq_in, in, ctx);
 636                 wq  = MLX5_ADDR_OF(rqc, rqc, wq);
 637                 MLX5_SET(wq, wq, dbr_umem_valid, 1);
 638                 MLX5_SET(wq, wq, wq_umem_valid, 1);
 639                 break;
 640         }
 641
 642         case MLX5_CMD_OP_CREATE_SQ:
 643         {
 644                 void *sqc, *wq;
 645
 646                 sqc = MLX5_ADDR_OF(create_sq_in, in, ctx);
 647                 wq = MLX5_ADDR_OF(sqc, sqc, wq);
 648                 MLX5_SET(wq, wq, dbr_umem_valid, 1);
 649                 MLX5_SET(wq, wq, wq_umem_valid, 1);
 650                 break;
 651         }
 652
 653         case MLX5_CMD_OP_MODIFY_CQ:
 654                 MLX5_SET(modify_cq_in, in, cq_umem_valid, 1);
 655                 break;
 656
 657         case MLX5_CMD_OP_CREATE_RMP:
 658         {
 659                 void *rmpc, *wq;
 660
 661                 rmpc = MLX5_ADDR_OF(create_rmp_in, in, ctx);
 662                 wq = MLX5_ADDR_OF(rmpc, rmpc, wq);
 663                 MLX5_SET(wq, wq, dbr_umem_valid, 1);
 664                 MLX5_SET(wq, wq, wq_umem_valid, 1);
 665                 break;
 666         }
 667
 668         case MLX5_CMD_OP_CREATE_XRQ:
 669         {
 670                 void *xrqc, *wq;
 671
 672                 xrqc = MLX5_ADDR_OF(create_xrq_in, in, xrq_context);
 673                 wq = MLX5_ADDR_OF(xrqc, xrqc, wq);
 674                 MLX5_SET(wq, wq, dbr_umem_valid, 1);
 675                 MLX5_SET(wq, wq, wq_umem_valid, 1);
 676                 break;
 677         }
 678
 679         case MLX5_CMD_OP_CREATE_XRC_SRQ:
 680         {
 681                 void *xrc_srqc;
 682
 683                 MLX5_SET(create_xrc_srq_in, in, xrc_srq_umem_valid, 1);
 684                 xrc_srqc = MLX5_ADDR_OF(create_xrc_srq_in, in,
 685                                         xrc_srq_context_entry);
 686                 MLX5_SET(xrc_srqc, xrc_srqc, dbr_umem_valid, 1);
 687                 break;
 688         }
 689
 690         default:
 691                 return;
 692         }
 693 }
 694
 695 static bool devx_is_obj_create_cmd(const void *in, u16 *opcode)
 696 {
 697         *opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
 698
 699         switch (*opcode) {
 700         case MLX5_CMD_OP_CREATE_GENERAL_OBJECT:
 701         case MLX5_CMD_OP_CREATE_MKEY:
 702         case MLX5_CMD_OP_CREATE_CQ:
 703         case MLX5_CMD_OP_ALLOC_PD:
 704         case MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN:
 705         case MLX5_CMD_OP_CREATE_RMP:
 706         case MLX5_CMD_OP_CREATE_SQ:
 707         case MLX5_CMD_OP_CREATE_RQ:
 708         case MLX5_CMD_OP_CREATE_RQT:
 709         case MLX5_CMD_OP_CREATE_TIR:
 710         case MLX5_CMD_OP_CREATE_TIS:
 711         case MLX5_CMD_OP_ALLOC_Q_COUNTER:
 712         case MLX5_CMD_OP_CREATE_FLOW_TABLE:
 713         case MLX5_CMD_OP_CREATE_FLOW_GROUP:
 714         case MLX5_CMD_OP_ALLOC_FLOW_COUNTER:
 715         case MLX5_CMD_OP_ALLOC_PACKET_REFORMAT_CONTEXT:
 716         case MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT:
 717         case MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT:
 718         case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
 719         case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
 720         case MLX5_CMD_OP_CREATE_QP:
 721         case MLX5_CMD_OP_CREATE_SRQ:
 722         case MLX5_CMD_OP_CREATE_XRC_SRQ:
 723         case MLX5_CMD_OP_CREATE_DCT:
 724         case MLX5_CMD_OP_CREATE_XRQ:
 725         case MLX5_CMD_OP_ATTACH_TO_MCG:
 726         case MLX5_CMD_OP_ALLOC_XRCD:
 727                 return true;
 728         case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
 729         {
 730                 u16 op_mod = MLX5_GET(set_fte_in, in, op_mod);
 731                 if (op_mod == 0)
 732                         return true;
 733                 return false;
 734         }
 735         case MLX5_CMD_OP_CREATE_PSV:
 736         {
 737                 u8 num_psv = MLX5_GET(create_psv_in, in, num_psv);
 738
 739                 if (num_psv == 1)
 740                         return true;
 741                 return false;
 742         }
 743         default:
 744                 return false;
 745         }
 746 }
 747
 748 static bool devx_is_obj_modify_cmd(const void *in)
 749 {
 750         u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
 751
 752         switch (opcode) {
 753         case MLX5_CMD_OP_MODIFY_GENERAL_OBJECT:
 754         case MLX5_CMD_OP_MODIFY_CQ:
 755         case MLX5_CMD_OP_MODIFY_RMP:
 756         case MLX5_CMD_OP_MODIFY_SQ:
 757         case MLX5_CMD_OP_MODIFY_RQ:
 758         case MLX5_CMD_OP_MODIFY_RQT:
 759         case MLX5_CMD_OP_MODIFY_TIR:
 760         case MLX5_CMD_OP_MODIFY_TIS:
 761         case MLX5_CMD_OP_MODIFY_FLOW_TABLE:
 762         case MLX5_CMD_OP_MODIFY_SCHEDULING_ELEMENT:
 763         case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
 764         case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
 765         case MLX5_CMD_OP_RST2INIT_QP:
 766         case MLX5_CMD_OP_INIT2RTR_QP:
 767         case MLX5_CMD_OP_INIT2INIT_QP:
 768         case MLX5_CMD_OP_RTR2RTS_QP:
 769         case MLX5_CMD_OP_RTS2RTS_QP:
 770         case MLX5_CMD_OP_SQERR2RTS_QP:
 771         case MLX5_CMD_OP_2ERR_QP:
 772         case MLX5_CMD_OP_2RST_QP:
 773         case MLX5_CMD_OP_ARM_XRC_SRQ:
 774         case MLX5_CMD_OP_ARM_RQ:
 775         case MLX5_CMD_OP_ARM_DCT_FOR_KEY_VIOLATION:
 776         case MLX5_CMD_OP_ARM_XRQ:
 777         case MLX5_CMD_OP_SET_XRQ_DC_PARAMS_ENTRY:
 778         case MLX5_CMD_OP_RELEASE_XRQ_ERROR:
 779         case MLX5_CMD_OP_MODIFY_XRQ:
 780                 return true;
 781         case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
 782         {
 783                 u16 op_mod = MLX5_GET(set_fte_in, in, op_mod);
 784
 785                 if (op_mod == 1)
 786                         return true;
 787                 return false;
 788         }
 789         default:
 790                 return false;
 791         }
 792 }
 793
 794 static bool devx_is_obj_query_cmd(const void *in)
 795 {
 796         u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
 797
 798         switch (opcode) {
 799         case MLX5_CMD_OP_QUERY_GENERAL_OBJECT:
 800         case MLX5_CMD_OP_QUERY_MKEY:
 801         case MLX5_CMD_OP_QUERY_CQ:
 802         case MLX5_CMD_OP_QUERY_RMP:
 803         case MLX5_CMD_OP_QUERY_SQ:
 804         case MLX5_CMD_OP_QUERY_RQ:
 805         case MLX5_CMD_OP_QUERY_RQT:
 806         case MLX5_CMD_OP_QUERY_TIR:
 807         case MLX5_CMD_OP_QUERY_TIS:
 808         case MLX5_CMD_OP_QUERY_Q_COUNTER:
 809         case MLX5_CMD_OP_QUERY_FLOW_TABLE:
 810         case MLX5_CMD_OP_QUERY_FLOW_GROUP:
 811         case MLX5_CMD_OP_QUERY_FLOW_TABLE_ENTRY:
 812         case MLX5_CMD_OP_QUERY_FLOW_COUNTER:
 813         case MLX5_CMD_OP_QUERY_MODIFY_HEADER_CONTEXT:
 814         case MLX5_CMD_OP_QUERY_SCHEDULING_ELEMENT:
 815         case MLX5_CMD_OP_QUERY_L2_TABLE_ENTRY:
 816         case MLX5_CMD_OP_QUERY_QP:
 817         case MLX5_CMD_OP_QUERY_SRQ:
 818         case MLX5_CMD_OP_QUERY_XRC_SRQ:
 819         case MLX5_CMD_OP_QUERY_DCT:
 820         case MLX5_CMD_OP_QUERY_XRQ:
 821         case MLX5_CMD_OP_QUERY_XRQ_DC_PARAMS_ENTRY:
 822         case MLX5_CMD_OP_QUERY_XRQ_ERROR_PARAMS:
 823         case MLX5_CMD_OP_QUERY_PACKET_REFORMAT_CONTEXT:
 824                 return true;
 825         default:
 826                 return false;
 827         }
 828 }
 829
 830 static bool devx_is_whitelist_cmd(void *in)
 831 {
 832         u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
 833
 834         switch (opcode) {
 835         case MLX5_CMD_OP_QUERY_HCA_CAP:
 836         case MLX5_CMD_OP_QUERY_HCA_VPORT_CONTEXT:
 837         case MLX5_CMD_OP_QUERY_ESW_VPORT_CONTEXT:
 838                 return true;
 839         default:
 840                 return false;
 841         }
 842 }
 843
 844 static int devx_get_uid(struct mlx5_ib_ucontext *c, void *cmd_in)
 845 {
 846         if (devx_is_whitelist_cmd(cmd_in)) {
 847                 struct mlx5_ib_dev *dev;
 848
 849                 if (c->devx_uid)
 850                         return c->devx_uid;
 851
 852                 dev = to_mdev(c->ibucontext.device);
 853                 if (dev->devx_whitelist_uid)
 854                         return dev->devx_whitelist_uid;
 855
 856                 return -EOPNOTSUPP;
 857         }
 858
 859         if (!c->devx_uid)
 860                 return -EINVAL;
 861
 862         return c->devx_uid;
 863 }
 864
 865 static bool devx_is_general_cmd(void *in, struct mlx5_ib_dev *dev)
 866 {
 867         u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
 868
 869         /* Pass all cmds for vhca_tunnel as general, tracking is done in FW */
 870         if ((MLX5_CAP_GEN_64(dev->mdev, vhca_tunnel_commands) &&
 871              MLX5_GET(general_obj_in_cmd_hdr, in, vhca_tunnel_id)) ||
 872             (opcode >= MLX5_CMD_OP_GENERAL_START &&
 873              opcode < MLX5_CMD_OP_GENERAL_END))
 874                 return true;
 875
 876         switch (opcode) {
 877         case MLX5_CMD_OP_QUERY_HCA_CAP:
 878         case MLX5_CMD_OP_QUERY_HCA_VPORT_CONTEXT:
 879         case MLX5_CMD_OP_QUERY_ESW_VPORT_CONTEXT:
 880         case MLX5_CMD_OP_QUERY_VPORT_STATE:
 881         case MLX5_CMD_OP_QUERY_ADAPTER:
 882         case MLX5_CMD_OP_QUERY_ISSI:
 883         case MLX5_CMD_OP_QUERY_NIC_VPORT_CONTEXT:
 884         case MLX5_CMD_OP_QUERY_ROCE_ADDRESS:
 885         case MLX5_CMD_OP_QUERY_VNIC_ENV:
 886         case MLX5_CMD_OP_QUERY_VPORT_COUNTER:
 887         case MLX5_CMD_OP_GET_DROPPED_PACKET_LOG:
 888         case MLX5_CMD_OP_NOP:
 889         case MLX5_CMD_OP_QUERY_CONG_STATUS:
 890         case MLX5_CMD_OP_QUERY_CONG_PARAMS:
 891         case MLX5_CMD_OP_QUERY_CONG_STATISTICS:
 892         case MLX5_CMD_OP_QUERY_LAG:
 893                 return true;
 894         default:
 895                 return false;
 896         }
 897 }
 898
 899 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_QUERY_EQN)(
 900         struct uverbs_attr_bundle *attrs)
 901 {
 902         struct mlx5_ib_ucontext *c;
 903         struct mlx5_ib_dev *dev;
 904         int user_vector;
 905         int dev_eqn;
 906         unsigned int irqn;
 907         int err;
 908
 909         if (uverbs_copy_from(&user_vector, attrs,
 910                              MLX5_IB_ATTR_DEVX_QUERY_EQN_USER_VEC))
 911                 return -EFAULT;
 912
 913         c = devx_ufile2uctx(attrs);
 914         if (IS_ERR(c))
 915                 return PTR_ERR(c);
 916         dev = to_mdev(c->ibucontext.device);
 917
 918         err = mlx5_vector2eqn(dev->mdev, user_vector, &dev_eqn, &irqn);
 919         if (err < 0)
 920                 return err;
 921
 922         if (uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_QUERY_EQN_DEV_EQN,
 923                            &dev_eqn, sizeof(dev_eqn)))
 924                 return -EFAULT;
 925
 926         return 0;
 927 }
 928
 929 /*
 930  *Security note:
 931  * The hardware protection mechanism works like this: Each device object that
 932  * is subject to UAR doorbells (QP/SQ/CQ) gets a UAR ID (called uar_page in
 933  * the device specification manual) upon its creation. Then upon doorbell,
 934  * hardware fetches the object context for which the doorbell was rang, and
 935  * validates that the UAR through which the DB was rang matches the UAR ID
 936  * of the object.
 937  * If no match the doorbell is silently ignored by the hardware. Of course,
 938  * the user cannot ring a doorbell on a UAR that was not mapped to it.
 939  * Now in devx, as the devx kernel does not manipulate the QP/SQ/CQ command
 940  * mailboxes (except tagging them with UID), we expose to the user its UAR
 941  * ID, so it can embed it in these objects in the expected specification
 942  * format. So the only thing the user can do is hurt itself by creating a
 943  * QP/SQ/CQ with a UAR ID other than his, and then in this case other users
 944  * may ring a doorbell on its objects.
 945  * The consequence of that will be that another user can schedule a QP/SQ
 946  * of the buggy user for execution (just insert it to the hardware schedule
 947  * queue or arm its CQ for event generation), no further harm is expected.
 948  */
 949 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_QUERY_UAR)(
 950         struct uverbs_attr_bundle *attrs)
 951 {
 952         struct mlx5_ib_ucontext *c;
 953         struct mlx5_ib_dev *dev;
 954         u32 user_idx;
 955         s32 dev_idx;
 956
 957         c = devx_ufile2uctx(attrs);
 958         if (IS_ERR(c))
 959                 return PTR_ERR(c);
 960         dev = to_mdev(c->ibucontext.device);
 961
 962         if (uverbs_copy_from(&user_idx, attrs,
 963                              MLX5_IB_ATTR_DEVX_QUERY_UAR_USER_IDX))
 964                 return -EFAULT;
 965
 966         dev_idx = bfregn_to_uar_index(dev, &c->bfregi, user_idx, true);
 967         if (dev_idx < 0)
 968                 return dev_idx;
 969
 970         if (uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_QUERY_UAR_DEV_IDX,
 971                            &dev_idx, sizeof(dev_idx)))
 972                 return -EFAULT;
 973
 974         return 0;
 975 }
 976
 977 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OTHER)(
 978         struct uverbs_attr_bundle *attrs)
 979 {
 980         struct mlx5_ib_ucontext *c;
 981         struct mlx5_ib_dev *dev;
 982         void *cmd_in = uverbs_attr_get_alloced_ptr(
 983                 attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_IN);
 984         int cmd_out_len = uverbs_attr_get_len(attrs,
 985                                         MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT);
 986         void *cmd_out;
 987         int err;
 988         int uid;
 989
 990         c = devx_ufile2uctx(attrs);
 991         if (IS_ERR(c))
 992                 return PTR_ERR(c);
 993         dev = to_mdev(c->ibucontext.device);
 994
 995         uid = devx_get_uid(c, cmd_in);
 996         if (uid < 0)
 997                 return uid;
 998
 999         /* Only white list of some general HCA commands are allowed for this method. */
1000         if (!devx_is_general_cmd(cmd_in, dev))
1001                 return -EINVAL;
1002
1003         cmd_out = uverbs_zalloc(attrs, cmd_out_len);
1004         if (IS_ERR(cmd_out))
1005                 return PTR_ERR(cmd_out);
1006
1007         MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1008         err = mlx5_cmd_exec(dev->mdev, cmd_in,
1009                             uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_IN),
1010                             cmd_out, cmd_out_len);
1011         if (err)
1012                 return err;
1013
1014         return uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT, cmd_out,
1015                               cmd_out_len);
1016 }
1017
1018 static void devx_obj_build_destroy_cmd(void *in, void *out, void *din,
1019                                        u32 *dinlen,
1020                                        u32 *obj_id)
1021 {
1022         u16 obj_type = MLX5_GET(general_obj_in_cmd_hdr, in, obj_type);
1023         u16 uid = MLX5_GET(general_obj_in_cmd_hdr, in, uid);
1024
1025         *obj_id = MLX5_GET(general_obj_out_cmd_hdr, out, obj_id);
1026         *dinlen = MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr);
1027
1028         MLX5_SET(general_obj_in_cmd_hdr, din, obj_id, *obj_id);
1029         MLX5_SET(general_obj_in_cmd_hdr, din, uid, uid);
1030
1031         switch (MLX5_GET(general_obj_in_cmd_hdr, in, opcode)) {
1032         case MLX5_CMD_OP_CREATE_GENERAL_OBJECT:
1033                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_GENERAL_OBJECT);
1034                 MLX5_SET(general_obj_in_cmd_hdr, din, obj_type, obj_type);
1035                 break;
1036
1037         case MLX5_CMD_OP_CREATE_UMEM:
1038                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1039                          MLX5_CMD_OP_DESTROY_UMEM);
1040                 break;
1041         case MLX5_CMD_OP_CREATE_MKEY:
1042                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_MKEY);
1043                 break;
1044         case MLX5_CMD_OP_CREATE_CQ:
1045                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_CQ);
1046                 break;
1047         case MLX5_CMD_OP_ALLOC_PD:
1048                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DEALLOC_PD);
1049                 break;
1050         case MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN:
1051                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1052                          MLX5_CMD_OP_DEALLOC_TRANSPORT_DOMAIN);
1053                 break;
1054         case MLX5_CMD_OP_CREATE_RMP:
1055                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_RMP);
1056                 break;
1057         case MLX5_CMD_OP_CREATE_SQ:
1058                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_SQ);
1059                 break;
1060         case MLX5_CMD_OP_CREATE_RQ:
1061                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_RQ);
1062                 break;
1063         case MLX5_CMD_OP_CREATE_RQT:
1064                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_RQT);
1065                 break;
1066         case MLX5_CMD_OP_CREATE_TIR:
1067                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_TIR);
1068                 break;
1069         case MLX5_CMD_OP_CREATE_TIS:
1070                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_TIS);
1071                 break;
1072         case MLX5_CMD_OP_ALLOC_Q_COUNTER:
1073                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1074                          MLX5_CMD_OP_DEALLOC_Q_COUNTER);
1075                 break;
1076         case MLX5_CMD_OP_CREATE_FLOW_TABLE:
1077                 *dinlen = MLX5_ST_SZ_BYTES(destroy_flow_table_in);
1078                 *obj_id = MLX5_GET(create_flow_table_out, out, table_id);
1079                 MLX5_SET(destroy_flow_table_in, din, other_vport,
1080                          MLX5_GET(create_flow_table_in,  in, other_vport));
1081                 MLX5_SET(destroy_flow_table_in, din, vport_number,
1082                          MLX5_GET(create_flow_table_in,  in, vport_number));
1083                 MLX5_SET(destroy_flow_table_in, din, table_type,
1084                          MLX5_GET(create_flow_table_in,  in, table_type));
1085                 MLX5_SET(destroy_flow_table_in, din, table_id, *obj_id);
1086                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1087                          MLX5_CMD_OP_DESTROY_FLOW_TABLE);
1088                 break;
1089         case MLX5_CMD_OP_CREATE_FLOW_GROUP:
1090                 *dinlen = MLX5_ST_SZ_BYTES(destroy_flow_group_in);
1091                 *obj_id = MLX5_GET(create_flow_group_out, out, group_id);
1092                 MLX5_SET(destroy_flow_group_in, din, other_vport,
1093                          MLX5_GET(create_flow_group_in, in, other_vport));
1094                 MLX5_SET(destroy_flow_group_in, din, vport_number,
1095                          MLX5_GET(create_flow_group_in, in, vport_number));
1096                 MLX5_SET(destroy_flow_group_in, din, table_type,
1097                          MLX5_GET(create_flow_group_in, in, table_type));
1098                 MLX5_SET(destroy_flow_group_in, din, table_id,
1099                          MLX5_GET(create_flow_group_in, in, table_id));
1100                 MLX5_SET(destroy_flow_group_in, din, group_id, *obj_id);
1101                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1102                          MLX5_CMD_OP_DESTROY_FLOW_GROUP);
1103                 break;
1104         case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
1105                 *dinlen = MLX5_ST_SZ_BYTES(delete_fte_in);
1106                 *obj_id = MLX5_GET(set_fte_in, in, flow_index);
1107                 MLX5_SET(delete_fte_in, din, other_vport,
1108                          MLX5_GET(set_fte_in,  in, other_vport));
1109                 MLX5_SET(delete_fte_in, din, vport_number,
1110                          MLX5_GET(set_fte_in, in, vport_number));
1111                 MLX5_SET(delete_fte_in, din, table_type,
1112                          MLX5_GET(set_fte_in, in, table_type));
1113                 MLX5_SET(delete_fte_in, din, table_id,
1114                          MLX5_GET(set_fte_in, in, table_id));
1115                 MLX5_SET(delete_fte_in, din, flow_index, *obj_id);
1116                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1117                          MLX5_CMD_OP_DELETE_FLOW_TABLE_ENTRY);
1118                 break;
1119         case MLX5_CMD_OP_ALLOC_FLOW_COUNTER:
1120                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1121                          MLX5_CMD_OP_DEALLOC_FLOW_COUNTER);
1122                 break;
1123         case MLX5_CMD_OP_ALLOC_PACKET_REFORMAT_CONTEXT:
1124                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1125                          MLX5_CMD_OP_DEALLOC_PACKET_REFORMAT_CONTEXT);
1126                 break;
1127         case MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT:
1128                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1129                          MLX5_CMD_OP_DEALLOC_MODIFY_HEADER_CONTEXT);
1130                 break;
1131         case MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT:
1132                 *dinlen = MLX5_ST_SZ_BYTES(destroy_scheduling_element_in);
1133                 *obj_id = MLX5_GET(create_scheduling_element_out, out,
1134                                    scheduling_element_id);
1135                 MLX5_SET(destroy_scheduling_element_in, din,
1136                          scheduling_hierarchy,
1137                          MLX5_GET(create_scheduling_element_in, in,
1138                                   scheduling_hierarchy));
1139                 MLX5_SET(destroy_scheduling_element_in, din,
1140                          scheduling_element_id, *obj_id);
1141                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1142                          MLX5_CMD_OP_DESTROY_SCHEDULING_ELEMENT);
1143                 break;
1144         case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
1145                 *dinlen = MLX5_ST_SZ_BYTES(delete_vxlan_udp_dport_in);
1146                 *obj_id = MLX5_GET(add_vxlan_udp_dport_in, in, vxlan_udp_port);
1147                 MLX5_SET(delete_vxlan_udp_dport_in, din, vxlan_udp_port, *obj_id);
1148                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1149                          MLX5_CMD_OP_DELETE_VXLAN_UDP_DPORT);
1150                 break;
1151         case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
1152                 *dinlen = MLX5_ST_SZ_BYTES(delete_l2_table_entry_in);
1153                 *obj_id = MLX5_GET(set_l2_table_entry_in, in, table_index);
1154                 MLX5_SET(delete_l2_table_entry_in, din, table_index, *obj_id);
1155                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1156                          MLX5_CMD_OP_DELETE_L2_TABLE_ENTRY);
1157                 break;
1158         case MLX5_CMD_OP_CREATE_QP:
1159                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_QP);
1160                 break;
1161         case MLX5_CMD_OP_CREATE_SRQ:
1162                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_SRQ);
1163                 break;
1164         case MLX5_CMD_OP_CREATE_XRC_SRQ:
1165                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1166                          MLX5_CMD_OP_DESTROY_XRC_SRQ);
1167                 break;
1168         case MLX5_CMD_OP_CREATE_DCT:
1169                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_DCT);
1170                 break;
1171         case MLX5_CMD_OP_CREATE_XRQ:
1172                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_XRQ);
1173                 break;
1174         case MLX5_CMD_OP_ATTACH_TO_MCG:
1175                 *dinlen = MLX5_ST_SZ_BYTES(detach_from_mcg_in);
1176                 MLX5_SET(detach_from_mcg_in, din, qpn,
1177                          MLX5_GET(attach_to_mcg_in, in, qpn));
1178                 memcpy(MLX5_ADDR_OF(detach_from_mcg_in, din, multicast_gid),
1179                        MLX5_ADDR_OF(attach_to_mcg_in, in, multicast_gid),
1180                        MLX5_FLD_SZ_BYTES(attach_to_mcg_in, multicast_gid));
1181                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DETACH_FROM_MCG);
1182                 break;
1183         case MLX5_CMD_OP_ALLOC_XRCD:
1184                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DEALLOC_XRCD);
1185                 break;
1186         case MLX5_CMD_OP_CREATE_PSV:
1187                 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1188                          MLX5_CMD_OP_DESTROY_PSV);
1189                 MLX5_SET(destroy_psv_in, din, psvn,
1190                          MLX5_GET(create_psv_out, out, psv0_index));
1191                 break;
1192         default:
1193                 /* The entry must match to one of the devx_is_obj_create_cmd */
1194                 WARN_ON(true);
1195                 break;
1196         }
1197 }
1198
1199 static int devx_handle_mkey_indirect(struct devx_obj *obj,
1200                                      struct mlx5_ib_dev *dev,
1201                                      void *in, void *out)
1202 {
1203         struct mlx5_ib_devx_mr *devx_mr = &obj->devx_mr;
1204         struct mlx5_core_mkey *mkey;
1205         void *mkc;
1206         u8 key;
1207
1208         mkey = &devx_mr->mmkey;
1209         mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry);
1210         key = MLX5_GET(mkc, mkc, mkey_7_0);
1211         mkey->key = mlx5_idx_to_mkey(
1212                         MLX5_GET(create_mkey_out, out, mkey_index)) | key;
1213         mkey->type = MLX5_MKEY_INDIRECT_DEVX;
1214         mkey->iova = MLX5_GET64(mkc, mkc, start_addr);
1215         mkey->size = MLX5_GET64(mkc, mkc, len);
1216         mkey->pd = MLX5_GET(mkc, mkc, pd);
1217         devx_mr->ndescs = MLX5_GET(mkc, mkc, translations_octword_size);
1218
1219         return xa_err(xa_store(&dev->odp_mkeys, mlx5_base_mkey(mkey->key), mkey,
1220                                GFP_KERNEL));
1221 }
1222
1223 static int devx_handle_mkey_create(struct mlx5_ib_dev *dev,
1224                                    struct devx_obj *obj,
1225                                    void *in, int in_len)
1226 {
1227         int min_len = MLX5_BYTE_OFF(create_mkey_in, memory_key_mkey_entry) +
1228                         MLX5_FLD_SZ_BYTES(create_mkey_in,
1229                         memory_key_mkey_entry);
1230         void *mkc;
1231         u8 access_mode;
1232
1233         if (in_len < min_len)
1234                 return -EINVAL;
1235
1236         mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry);
1237
1238         access_mode = MLX5_GET(mkc, mkc, access_mode_1_0);
1239         access_mode |= MLX5_GET(mkc, mkc, access_mode_4_2) << 2;
1240
1241         if (access_mode == MLX5_MKC_ACCESS_MODE_KLMS ||
1242                 access_mode == MLX5_MKC_ACCESS_MODE_KSM) {
1243                 if (IS_ENABLED(CONFIG_INFINIBAND_ON_DEMAND_PAGING))
1244                         obj->flags |= DEVX_OBJ_FLAGS_INDIRECT_MKEY;
1245                 return 0;
1246         }
1247
1248         MLX5_SET(create_mkey_in, in, mkey_umem_valid, 1);
1249         return 0;
1250 }
1251
1252 static void devx_cleanup_subscription(struct mlx5_ib_dev *dev,
1253                                       struct devx_event_subscription *sub)
1254 {
1255         struct devx_event *event;
1256         struct devx_obj_event *xa_val_level2;
1257
1258         if (sub->is_cleaned)
1259                 return;
1260
1261         sub->is_cleaned = 1;
1262         list_del_rcu(&sub->xa_list);
1263
1264         if (list_empty(&sub->obj_list))
1265                 return;
1266
1267         list_del_rcu(&sub->obj_list);
1268         /* check whether key level 1 for this obj_sub_list is empty */
1269         event = xa_load(&dev->devx_event_table.event_xa,
1270                         sub->xa_key_level1);
1271         WARN_ON(!event);
1272
1273         xa_val_level2 = xa_load(&event->object_ids, sub->xa_key_level2);
1274         if (list_empty(&xa_val_level2->obj_sub_list)) {
1275                 xa_erase(&event->object_ids,
1276                          sub->xa_key_level2);
1277                 kfree_rcu(xa_val_level2, rcu);
1278         }
1279 }
1280
1281 static int devx_obj_cleanup(struct ib_uobject *uobject,
1282                             enum rdma_remove_reason why,
1283                             struct uverbs_attr_bundle *attrs)
1284 {
1285         u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
1286         struct mlx5_devx_event_table *devx_event_table;
1287         struct devx_obj *obj = uobject->object;
1288         struct devx_event_subscription *sub_entry, *tmp;
1289         struct mlx5_ib_dev *dev;
1290         int ret;
1291
1292         dev = mlx5_udata_to_mdev(&attrs->driver_udata);
1293         if (obj->flags & DEVX_OBJ_FLAGS_INDIRECT_MKEY) {
1294                 /*
1295                  * The pagefault_single_data_segment() does commands against
1296                  * the mmkey, we must wait for that to stop before freeing the
1297                  * mkey, as another allocation could get the same mkey #.
1298                  */
1299                 xa_erase(&obj->ib_dev->odp_mkeys,
1300                          mlx5_base_mkey(obj->devx_mr.mmkey.key));
1301                 synchronize_srcu(&dev->odp_srcu);
1302         }
1303
1304         if (obj->flags & DEVX_OBJ_FLAGS_DCT)
1305                 ret = mlx5_core_destroy_dct(obj->ib_dev, &obj->core_dct);
1306         else if (obj->flags & DEVX_OBJ_FLAGS_CQ)
1307                 ret = mlx5_core_destroy_cq(obj->ib_dev->mdev, &obj->core_cq);
1308         else
1309                 ret = mlx5_cmd_exec(obj->ib_dev->mdev, obj->dinbox,
1310                                     obj->dinlen, out, sizeof(out));
1311         if (ret)
1312                 return ret;
1313
1314         devx_event_table = &dev->devx_event_table;
1315
1316         mutex_lock(&devx_event_table->event_xa_lock);
1317         list_for_each_entry_safe(sub_entry, tmp, &obj->event_sub, obj_list)
1318                 devx_cleanup_subscription(dev, sub_entry);
1319         mutex_unlock(&devx_event_table->event_xa_lock);
1320
1321         kfree(obj);
1322         return ret;
1323 }
1324
1325 static void devx_cq_comp(struct mlx5_core_cq *mcq, struct mlx5_eqe *eqe)
1326 {
1327         struct devx_obj *obj = container_of(mcq, struct devx_obj, core_cq);
1328         struct mlx5_devx_event_table *table;
1329         struct devx_event *event;
1330         struct devx_obj_event *obj_event;
1331         u32 obj_id = mcq->cqn;
1332
1333         table = &obj->ib_dev->devx_event_table;
1334         rcu_read_lock();
1335         event = xa_load(&table->event_xa, MLX5_EVENT_TYPE_COMP);
1336         if (!event)
1337                 goto out;
1338
1339         obj_event = xa_load(&event->object_ids, obj_id);
1340         if (!obj_event)
1341                 goto out;
1342
1343         dispatch_event_fd(&obj_event->obj_sub_list, eqe);
1344 out:
1345         rcu_read_unlock();
1346 }
1347
1348 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_CREATE)(
1349         struct uverbs_attr_bundle *attrs)
1350 {
1351         void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN);
1352         int cmd_out_len =  uverbs_attr_get_len(attrs,
1353                                         MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT);
1354         int cmd_in_len = uverbs_attr_get_len(attrs,
1355                                         MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN);
1356         void *cmd_out;
1357         struct ib_uobject *uobj = uverbs_attr_get_uobject(
1358                 attrs, MLX5_IB_ATTR_DEVX_OBJ_CREATE_HANDLE);
1359         struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1360                 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1361         struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
1362         u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
1363         struct devx_obj *obj;
1364         u16 obj_type = 0;
1365         int err;
1366         int uid;
1367         u32 obj_id;
1368         u16 opcode;
1369
1370         if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id))
1371                 return -EINVAL;
1372
1373         uid = devx_get_uid(c, cmd_in);
1374         if (uid < 0)
1375                 return uid;
1376
1377         if (!devx_is_obj_create_cmd(cmd_in, &opcode))
1378                 return -EINVAL;
1379
1380         cmd_out = uverbs_zalloc(attrs, cmd_out_len);
1381         if (IS_ERR(cmd_out))
1382                 return PTR_ERR(cmd_out);
1383
1384         obj = kzalloc(sizeof(struct devx_obj), GFP_KERNEL);
1385         if (!obj)
1386                 return -ENOMEM;
1387
1388         MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1389         if (opcode == MLX5_CMD_OP_CREATE_MKEY) {
1390                 err = devx_handle_mkey_create(dev, obj, cmd_in, cmd_in_len);
1391                 if (err)
1392                         goto obj_free;
1393         } else {
1394                 devx_set_umem_valid(cmd_in);
1395         }
1396
1397         if (opcode == MLX5_CMD_OP_CREATE_DCT) {
1398                 obj->flags |= DEVX_OBJ_FLAGS_DCT;
1399                 err = mlx5_core_create_dct(dev, &obj->core_dct, cmd_in,
1400                                            cmd_in_len, cmd_out, cmd_out_len);
1401         } else if (opcode == MLX5_CMD_OP_CREATE_CQ) {
1402                 obj->flags |= DEVX_OBJ_FLAGS_CQ;
1403                 obj->core_cq.comp = devx_cq_comp;
1404                 err = mlx5_core_create_cq(dev->mdev, &obj->core_cq,
1405                                           cmd_in, cmd_in_len, cmd_out,
1406                                           cmd_out_len);
1407         } else {
1408                 err = mlx5_cmd_exec(dev->mdev, cmd_in,
1409                                     cmd_in_len,
1410                                     cmd_out, cmd_out_len);
1411         }
1412
1413         if (err)
1414                 goto obj_free;
1415
1416         if (opcode == MLX5_CMD_OP_ALLOC_FLOW_COUNTER) {
1417                 u8 bulk = MLX5_GET(alloc_flow_counter_in,
1418                                    cmd_in,
1419                                    flow_counter_bulk);
1420                 obj->flow_counter_bulk_size = 128UL * bulk;
1421         }
1422
1423         uobj->object = obj;
1424         INIT_LIST_HEAD(&obj->event_sub);
1425         obj->ib_dev = dev;
1426         devx_obj_build_destroy_cmd(cmd_in, cmd_out, obj->dinbox, &obj->dinlen,
1427                                    &obj_id);
1428         WARN_ON(obj->dinlen > MLX5_MAX_DESTROY_INBOX_SIZE_DW * sizeof(u32));
1429
1430         err = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT, cmd_out, cmd_out_len);
1431         if (err)
1432                 goto obj_destroy;
1433
1434         if (opcode == MLX5_CMD_OP_CREATE_GENERAL_OBJECT)
1435                 obj_type = MLX5_GET(general_obj_in_cmd_hdr, cmd_in, obj_type);
1436         obj->obj_id = get_enc_obj_id(opcode | obj_type << 16, obj_id);
1437
1438         if (obj->flags & DEVX_OBJ_FLAGS_INDIRECT_MKEY) {
1439                 err = devx_handle_mkey_indirect(obj, dev, cmd_in, cmd_out);
1440                 if (err)
1441                         goto obj_destroy;
1442         }
1443         return 0;
1444
1445 obj_destroy:
1446         if (obj->flags & DEVX_OBJ_FLAGS_DCT)
1447                 mlx5_core_destroy_dct(obj->ib_dev, &obj->core_dct);
1448         else if (obj->flags & DEVX_OBJ_FLAGS_CQ)
1449                 mlx5_core_destroy_cq(obj->ib_dev->mdev, &obj->core_cq);
1450         else
1451                 mlx5_cmd_exec(obj->ib_dev->mdev, obj->dinbox, obj->dinlen, out,
1452                               sizeof(out));
1453 obj_free:
1454         kfree(obj);
1455         return err;
1456 }
1457
1458 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_MODIFY)(
1459         struct uverbs_attr_bundle *attrs)
1460 {
1461         void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN);
1462         int cmd_out_len = uverbs_attr_get_len(attrs,
1463                                         MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT);
1464         struct ib_uobject *uobj = uverbs_attr_get_uobject(attrs,
1465                                                           MLX5_IB_ATTR_DEVX_OBJ_MODIFY_HANDLE);
1466         struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1467                 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1468         struct mlx5_ib_dev *mdev = to_mdev(c->ibucontext.device);
1469         void *cmd_out;
1470         int err;
1471         int uid;
1472
1473         if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id))
1474                 return -EINVAL;
1475
1476         uid = devx_get_uid(c, cmd_in);
1477         if (uid < 0)
1478                 return uid;
1479
1480         if (!devx_is_obj_modify_cmd(cmd_in))
1481                 return -EINVAL;
1482
1483         if (!devx_is_valid_obj_id(attrs, uobj, cmd_in))
1484                 return -EINVAL;
1485
1486         cmd_out = uverbs_zalloc(attrs, cmd_out_len);
1487         if (IS_ERR(cmd_out))
1488                 return PTR_ERR(cmd_out);
1489
1490         MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1491         devx_set_umem_valid(cmd_in);
1492
1493         err = mlx5_cmd_exec(mdev->mdev, cmd_in,
1494                             uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN),
1495                             cmd_out, cmd_out_len);
1496         if (err)
1497                 return err;
1498
1499         return uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT,
1500                               cmd_out, cmd_out_len);
1501 }
1502
1503 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_QUERY)(
1504         struct uverbs_attr_bundle *attrs)
1505 {
1506         void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN);
1507         int cmd_out_len = uverbs_attr_get_len(attrs,
1508                                               MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT);
1509         struct ib_uobject *uobj = uverbs_attr_get_uobject(attrs,
1510                                                           MLX5_IB_ATTR_DEVX_OBJ_QUERY_HANDLE);
1511         struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1512                 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1513         void *cmd_out;
1514         int err;
1515         int uid;
1516         struct mlx5_ib_dev *mdev = to_mdev(c->ibucontext.device);
1517
1518         if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id))
1519                 return -EINVAL;
1520
1521         uid = devx_get_uid(c, cmd_in);
1522         if (uid < 0)
1523                 return uid;
1524
1525         if (!devx_is_obj_query_cmd(cmd_in))
1526                 return -EINVAL;
1527
1528         if (!devx_is_valid_obj_id(attrs, uobj, cmd_in))
1529                 return -EINVAL;
1530
1531         cmd_out = uverbs_zalloc(attrs, cmd_out_len);
1532         if (IS_ERR(cmd_out))
1533                 return PTR_ERR(cmd_out);
1534
1535         MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1536         err = mlx5_cmd_exec(mdev->mdev, cmd_in,
1537                             uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN),
1538                             cmd_out, cmd_out_len);
1539         if (err)
1540                 return err;
1541
1542         return uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT,
1543                               cmd_out, cmd_out_len);
1544 }
1545
1546 struct devx_async_event_queue {
1547         spinlock_t              lock;
1548         wait_queue_head_t       poll_wait;
1549         struct list_head        event_list;
1550         atomic_t                bytes_in_use;
1551         u8                      is_destroyed:1;
1552 };
1553
1554 struct devx_async_cmd_event_file {
1555         struct ib_uobject               uobj;
1556         struct devx_async_event_queue   ev_queue;
1557         struct mlx5_async_ctx           async_ctx;
1558 };
1559
1560 static void devx_init_event_queue(struct devx_async_event_queue *ev_queue)
1561 {
1562         spin_lock_init(&ev_queue->lock);
1563         INIT_LIST_HEAD(&ev_queue->event_list);
1564         init_waitqueue_head(&ev_queue->poll_wait);
1565         atomic_set(&ev_queue->bytes_in_use, 0);
1566         ev_queue->is_destroyed = 0;
1567 }
1568
1569 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC)(
1570         struct uverbs_attr_bundle *attrs)
1571 {
1572         struct devx_async_cmd_event_file *ev_file;
1573
1574         struct ib_uobject *uobj = uverbs_attr_get_uobject(
1575                 attrs, MLX5_IB_ATTR_DEVX_ASYNC_CMD_FD_ALLOC_HANDLE);
1576         struct mlx5_ib_dev *mdev = mlx5_udata_to_mdev(&attrs->driver_udata);
1577
1578         ev_file = container_of(uobj, struct devx_async_cmd_event_file,
1579                                uobj);
1580         devx_init_event_queue(&ev_file->ev_queue);
1581         mlx5_cmd_init_async_ctx(mdev->mdev, &ev_file->async_ctx);
1582         return 0;
1583 }
1584
1585 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC)(
1586         struct uverbs_attr_bundle *attrs)
1587 {
1588         struct ib_uobject *uobj = uverbs_attr_get_uobject(
1589                 attrs, MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_HANDLE);
1590         struct devx_async_event_file *ev_file;
1591         struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1592                 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1593         struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
1594         u32 flags;
1595         int err;
1596
1597         err = uverbs_get_flags32(&flags, attrs,
1598                 MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_FLAGS,
1599                 MLX5_IB_UAPI_DEVX_CR_EV_CH_FLAGS_OMIT_DATA);
1600
1601         if (err)
1602                 return err;
1603
1604         ev_file = container_of(uobj, struct devx_async_event_file,
1605                                uobj);
1606         spin_lock_init(&ev_file->lock);
1607         INIT_LIST_HEAD(&ev_file->event_list);
1608         init_waitqueue_head(&ev_file->poll_wait);
1609         if (flags & MLX5_IB_UAPI_DEVX_CR_EV_CH_FLAGS_OMIT_DATA)
1610                 ev_file->omit_data = 1;
1611         INIT_LIST_HEAD(&ev_file->subscribed_events_list);
1612         ev_file->dev = dev;
1613         get_device(&dev->ib_dev.dev);
1614         return 0;
1615 }
1616
1617 static void devx_query_callback(int status, struct mlx5_async_work *context)
1618 {
1619         struct devx_async_data *async_data =
1620                 container_of(context, struct devx_async_data, cb_work);
1621         struct devx_async_cmd_event_file *ev_file = async_data->ev_file;
1622         struct devx_async_event_queue *ev_queue = &ev_file->ev_queue;
1623         unsigned long flags;
1624
1625         /*
1626          * Note that if the struct devx_async_cmd_event_file uobj begins to be
1627          * destroyed it will block at mlx5_cmd_cleanup_async_ctx() until this
1628          * routine returns, ensuring that it always remains valid here.
1629          */
1630         spin_lock_irqsave(&ev_queue->lock, flags);
1631         list_add_tail(&async_data->list, &ev_queue->event_list);
1632         spin_unlock_irqrestore(&ev_queue->lock, flags);
1633
1634         wake_up_interruptible(&ev_queue->poll_wait);
1635 }
1636
1637 #define MAX_ASYNC_BYTES_IN_USE (1024 * 1024) /* 1MB */
1638
1639 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_ASYNC_QUERY)(
1640         struct uverbs_attr_bundle *attrs)
1641 {
1642         void *cmd_in = uverbs_attr_get_alloced_ptr(attrs,
1643                                 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_CMD_IN);
1644         struct ib_uobject *uobj = uverbs_attr_get_uobject(
1645                                 attrs,
1646                                 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_HANDLE);
1647         u16 cmd_out_len;
1648         struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1649                 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1650         struct ib_uobject *fd_uobj;
1651         int err;
1652         int uid;
1653         struct mlx5_ib_dev *mdev = to_mdev(c->ibucontext.device);
1654         struct devx_async_cmd_event_file *ev_file;
1655         struct devx_async_data *async_data;
1656
1657         if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id))
1658                 return -EINVAL;
1659
1660         uid = devx_get_uid(c, cmd_in);
1661         if (uid < 0)
1662                 return uid;
1663
1664         if (!devx_is_obj_query_cmd(cmd_in))
1665                 return -EINVAL;
1666
1667         err = uverbs_get_const(&cmd_out_len, attrs,
1668                                MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_OUT_LEN);
1669         if (err)
1670                 return err;
1671
1672         if (!devx_is_valid_obj_id(attrs, uobj, cmd_in))
1673                 return -EINVAL;
1674
1675         fd_uobj = uverbs_attr_get_uobject(attrs,
1676                                 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_FD);
1677         if (IS_ERR(fd_uobj))
1678                 return PTR_ERR(fd_uobj);
1679
1680         ev_file = container_of(fd_uobj, struct devx_async_cmd_event_file,
1681                                uobj);
1682
1683         if (atomic_add_return(cmd_out_len, &ev_file->ev_queue.bytes_in_use) >
1684                         MAX_ASYNC_BYTES_IN_USE) {
1685                 atomic_sub(cmd_out_len, &ev_file->ev_queue.bytes_in_use);
1686                 return -EAGAIN;
1687         }
1688
1689         async_data = kvzalloc(struct_size(async_data, hdr.out_data,
1690                                           cmd_out_len), GFP_KERNEL);
1691         if (!async_data) {
1692                 err = -ENOMEM;
1693                 goto sub_bytes;
1694         }
1695
1696         err = uverbs_copy_from(&async_data->hdr.wr_id, attrs,
1697                                MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_WR_ID);
1698         if (err)
1699                 goto free_async;
1700
1701         async_data->cmd_out_len = cmd_out_len;
1702         async_data->mdev = mdev;
1703         async_data->ev_file = ev_file;
1704
1705         MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1706         err = mlx5_cmd_exec_cb(&ev_file->async_ctx, cmd_in,
1707                     uverbs_attr_get_len(attrs,
1708                                 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_CMD_IN),
1709                     async_data->hdr.out_data,
1710                     async_data->cmd_out_len,
1711                     devx_query_callback, &async_data->cb_work);
1712
1713         if (err)
1714                 goto free_async;
1715
1716         return 0;
1717
1718 free_async:
1719         kvfree(async_data);
1720 sub_bytes:
1721         atomic_sub(cmd_out_len, &ev_file->ev_queue.bytes_in_use);
1722         return err;
1723 }
1724
1725 static void
1726 subscribe_event_xa_dealloc(struct mlx5_devx_event_table *devx_event_table,
1727                            u32 key_level1,
1728                            bool is_level2,
1729                            u32 key_level2)
1730 {
1731         struct devx_event *event;
1732         struct devx_obj_event *xa_val_level2;
1733
1734         /* Level 1 is valid for future use, no need to free */
1735         if (!is_level2)
1736                 return;
1737
1738         event = xa_load(&devx_event_table->event_xa, key_level1);
1739         WARN_ON(!event);
1740
1741         xa_val_level2 = xa_load(&event->object_ids,
1742                                 key_level2);
1743         if (list_empty(&xa_val_level2->obj_sub_list)) {
1744                 xa_erase(&event->object_ids,
1745                          key_level2);
1746                 kfree_rcu(xa_val_level2, rcu);
1747         }
1748 }
1749
1750 static int
1751 subscribe_event_xa_alloc(struct mlx5_devx_event_table *devx_event_table,
1752                          u32 key_level1,
1753                          bool is_level2,
1754                          u32 key_level2)
1755 {
1756         struct devx_obj_event *obj_event;
1757         struct devx_event *event;
1758         int err;
1759
1760         event = xa_load(&devx_event_table->event_xa, key_level1);
1761         if (!event) {
1762                 event = kzalloc(sizeof(*event), GFP_KERNEL);
1763                 if (!event)
1764                         return -ENOMEM;
1765
1766                 INIT_LIST_HEAD(&event->unaffiliated_list);
1767                 xa_init(&event->object_ids);
1768
1769                 err = xa_insert(&devx_event_table->event_xa,
1770                                 key_level1,
1771                                 event,
1772                                 GFP_KERNEL);
1773                 if (err) {
1774                         kfree(event);
1775                         return err;
1776                 }
1777         }
1778
1779         if (!is_level2)
1780                 return 0;
1781
1782         obj_event = xa_load(&event->object_ids, key_level2);
1783         if (!obj_event) {
1784                 obj_event = kzalloc(sizeof(*obj_event), GFP_KERNEL);
1785                 if (!obj_event)
1786                         /* Level1 is valid for future use, no need to free */
1787                         return -ENOMEM;
1788
1789                 err = xa_insert(&event->object_ids,
1790                                 key_level2,
1791                                 obj_event,
1792                                 GFP_KERNEL);
1793                 if (err)
1794                         return err;
1795                 INIT_LIST_HEAD(&obj_event->obj_sub_list);
1796         }
1797
1798         return 0;
1799 }
1800
1801 static bool is_valid_events_legacy(int num_events, u16 *event_type_num_list,
1802                                    struct devx_obj *obj)
1803 {
1804         int i;
1805
1806         for (i = 0; i < num_events; i++) {
1807                 if (obj) {
1808                         if (!is_legacy_obj_event_num(event_type_num_list[i]))
1809                                 return false;
1810                 } else if (!is_legacy_unaffiliated_event_num(
1811                                 event_type_num_list[i])) {
1812                         return false;
1813                 }
1814         }
1815
1816         return true;
1817 }
1818
1819 #define MAX_SUPP_EVENT_NUM 255
1820 static bool is_valid_events(struct mlx5_core_dev *dev,
1821                             int num_events, u16 *event_type_num_list,
1822                             struct devx_obj *obj)
1823 {
1824         __be64 *aff_events;
1825         __be64 *unaff_events;
1826         int mask_entry;
1827         int mask_bit;
1828         int i;
1829
1830         if (MLX5_CAP_GEN(dev, event_cap)) {
1831                 aff_events = MLX5_CAP_DEV_EVENT(dev,
1832                                                 user_affiliated_events);
1833                 unaff_events = MLX5_CAP_DEV_EVENT(dev,
1834                                                   user_unaffiliated_events);
1835         } else {
1836                 return is_valid_events_legacy(num_events, event_type_num_list,
1837                                               obj);
1838         }
1839
1840         for (i = 0; i < num_events; i++) {
1841                 if (event_type_num_list[i] > MAX_SUPP_EVENT_NUM)
1842                         return false;
1843
1844                 mask_entry = event_type_num_list[i] / 64;
1845                 mask_bit = event_type_num_list[i] % 64;
1846
1847                 if (obj) {
1848                         /* CQ completion */
1849                         if (event_type_num_list[i] == 0)
1850                                 continue;
1851
1852                         if (!(be64_to_cpu(aff_events[mask_entry]) &
1853                                         (1ull << mask_bit)))
1854                                 return false;
1855
1856                         continue;
1857                 }
1858
1859                 if (!(be64_to_cpu(unaff_events[mask_entry]) &
1860                                 (1ull << mask_bit)))
1861                         return false;
1862         }
1863
1864         return true;
1865 }
1866
1867 #define MAX_NUM_EVENTS 16
1868 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT)(
1869         struct uverbs_attr_bundle *attrs)
1870 {
1871         struct ib_uobject *devx_uobj = uverbs_attr_get_uobject(
1872                                 attrs,
1873                                 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_OBJ_HANDLE);
1874         struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1875                 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1876         struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
1877         struct ib_uobject *fd_uobj;
1878         struct devx_obj *obj = NULL;
1879         struct devx_async_event_file *ev_file;
1880         struct mlx5_devx_event_table *devx_event_table = &dev->devx_event_table;
1881         u16 *event_type_num_list;
1882         struct devx_event_subscription *event_sub, *tmp_sub;
1883         struct list_head sub_list;
1884         int redirect_fd;
1885         bool use_eventfd = false;
1886         int num_events;
1887         int num_alloc_xa_entries = 0;
1888         u16 obj_type = 0;
1889         u64 cookie = 0;
1890         u32 obj_id = 0;
1891         int err;
1892         int i;
1893
1894         if (!c->devx_uid)
1895                 return -EINVAL;
1896
1897         if (!IS_ERR(devx_uobj)) {
1898                 obj = (struct devx_obj *)devx_uobj->object;
1899                 if (obj)
1900                         obj_id = get_dec_obj_id(obj->obj_id);
1901         }
1902
1903         fd_uobj = uverbs_attr_get_uobject(attrs,
1904                                 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_HANDLE);
1905         if (IS_ERR(fd_uobj))
1906                 return PTR_ERR(fd_uobj);
1907
1908         ev_file = container_of(fd_uobj, struct devx_async_event_file,
1909                                uobj);
1910
1911         if (uverbs_attr_is_valid(attrs,
1912                                  MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_NUM)) {
1913                 err = uverbs_copy_from(&redirect_fd, attrs,
1914                                MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_NUM);
1915                 if (err)
1916                         return err;
1917
1918                 use_eventfd = true;
1919         }
1920
1921         if (uverbs_attr_is_valid(attrs,
1922                                  MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_COOKIE)) {
1923                 if (use_eventfd)
1924                         return -EINVAL;
1925
1926                 err = uverbs_copy_from(&cookie, attrs,
1927                                 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_COOKIE);
1928                 if (err)
1929                         return err;
1930         }
1931
1932         num_events = uverbs_attr_ptr_get_array_size(
1933                 attrs, MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_TYPE_NUM_LIST,
1934                 sizeof(u16));
1935
1936         if (num_events < 0)
1937                 return num_events;
1938
1939         if (num_events > MAX_NUM_EVENTS)
1940                 return -EINVAL;
1941
1942         event_type_num_list = uverbs_attr_get_alloced_ptr(attrs,
1943                         MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_TYPE_NUM_LIST);
1944
1945         if (!is_valid_events(dev->mdev, num_events, event_type_num_list, obj))
1946                 return -EINVAL;
1947
1948         INIT_LIST_HEAD(&sub_list);
1949
1950         /* Protect from concurrent subscriptions to same XA entries to allow
1951          * both to succeed
1952          */
1953         mutex_lock(&devx_event_table->event_xa_lock);
1954         for (i = 0; i < num_events; i++) {
1955                 u32 key_level1;
1956
1957                 if (obj)
1958                         obj_type = get_dec_obj_type(obj,
1959                                                     event_type_num_list[i]);
1960                 key_level1 = event_type_num_list[i] | obj_type << 16;
1961
1962                 err = subscribe_event_xa_alloc(devx_event_table,
1963                                                key_level1,
1964                                                obj,
1965                                                obj_id);
1966                 if (err)
1967                         goto err;
1968
1969                 num_alloc_xa_entries++;
1970                 event_sub = kzalloc(sizeof(*event_sub), GFP_KERNEL);
1971                 if (!event_sub)
1972                         goto err;
1973
1974                 list_add_tail(&event_sub->event_list, &sub_list);
1975                 uverbs_uobject_get(&ev_file->uobj);
1976                 if (use_eventfd) {
1977                         event_sub->eventfd =
1978                                 eventfd_ctx_fdget(redirect_fd);
1979
1980                         if (IS_ERR(event_sub->eventfd)) {
1981                                 err = PTR_ERR(event_sub->eventfd);
1982                                 event_sub->eventfd = NULL;
1983                                 goto err;
1984                         }
1985                 }
1986
1987                 event_sub->cookie = cookie;
1988                 event_sub->ev_file = ev_file;
1989                 /* May be needed upon cleanup the devx object/subscription */
1990                 event_sub->xa_key_level1 = key_level1;
1991                 event_sub->xa_key_level2 = obj_id;
1992                 INIT_LIST_HEAD(&event_sub->obj_list);
1993         }
1994
1995         /* Once all the allocations and the XA data insertions were done we
1996          * can go ahead and add all the subscriptions to the relevant lists
1997          * without concern of a failure.
1998          */
1999         list_for_each_entry_safe(event_sub, tmp_sub, &sub_list, event_list) {
2000                 struct devx_event *event;
2001                 struct devx_obj_event *obj_event;
2002
2003                 list_del_init(&event_sub->event_list);
2004
2005                 spin_lock_irq(&ev_file->lock);
2006                 list_add_tail_rcu(&event_sub->file_list,
2007                                   &ev_file->subscribed_events_list);
2008                 spin_unlock_irq(&ev_file->lock);
2009
2010                 event = xa_load(&devx_event_table->event_xa,
2011                                 event_sub->xa_key_level1);
2012                 WARN_ON(!event);
2013
2014                 if (!obj) {
2015                         list_add_tail_rcu(&event_sub->xa_list,
2016                                           &event->unaffiliated_list);
2017                         continue;
2018                 }
2019
2020                 obj_event = xa_load(&event->object_ids, obj_id);
2021                 WARN_ON(!obj_event);
2022                 list_add_tail_rcu(&event_sub->xa_list,
2023                                   &obj_event->obj_sub_list);
2024                 list_add_tail_rcu(&event_sub->obj_list,
2025                                   &obj->event_sub);
2026         }
2027
2028         mutex_unlock(&devx_event_table->event_xa_lock);
2029         return 0;
2030
2031 err:
2032         list_for_each_entry_safe(event_sub, tmp_sub, &sub_list, event_list) {
2033                 list_del(&event_sub->event_list);
2034
2035                 subscribe_event_xa_dealloc(devx_event_table,
2036                                            event_sub->xa_key_level1,
2037                                            obj,
2038                                            obj_id);
2039
2040                 if (event_sub->eventfd)
2041                         eventfd_ctx_put(event_sub->eventfd);
2042                 uverbs_uobject_put(&event_sub->ev_file->uobj);
2043                 kfree(event_sub);
2044         }
2045
2046         mutex_unlock(&devx_event_table->event_xa_lock);
2047         return err;
2048 }
2049
2050 static int devx_umem_get(struct mlx5_ib_dev *dev, struct ib_ucontext *ucontext,
2051                          struct uverbs_attr_bundle *attrs,
2052                          struct devx_umem *obj)
2053 {
2054         u64 addr;
2055         size_t size;
2056         u32 access;
2057         int err;
2058
2059         if (uverbs_copy_from(&addr, attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_ADDR) ||
2060             uverbs_copy_from(&size, attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_LEN))
2061                 return -EFAULT;
2062
2063         err = uverbs_get_flags32(&access, attrs,
2064                                  MLX5_IB_ATTR_DEVX_UMEM_REG_ACCESS,
2065                                  IB_ACCESS_LOCAL_WRITE |
2066                                  IB_ACCESS_REMOTE_WRITE |
2067                                  IB_ACCESS_REMOTE_READ);
2068         if (err)
2069                 return err;
2070
2071         err = ib_check_mr_access(&dev->ib_dev, access);
2072         if (err)
2073                 return err;
2074
2075         obj->umem = ib_umem_get(&dev->ib_dev, addr, size, access);
2076         if (IS_ERR(obj->umem))
2077                 return PTR_ERR(obj->umem);
2078         return 0;
2079 }
2080
2081 static int devx_umem_reg_cmd_alloc(struct mlx5_ib_dev *dev,
2082                                    struct uverbs_attr_bundle *attrs,
2083                                    struct devx_umem *obj,
2084                                    struct devx_umem_reg_cmd *cmd)
2085 {
2086         unsigned int page_size;
2087         __be64 *mtt;
2088         void *umem;
2089
2090         /*
2091          * We don't know what the user intends to use this umem for, but the HW
2092          * restrictions must be met. MR, doorbell records, QP, WQ and CQ all
2093          * have different requirements. Since we have no idea how to sort this
2094          * out, only support PAGE_SIZE with the expectation that userspace will
2095          * provide the necessary alignments inside the known PAGE_SIZE and that
2096          * FW will check everything.
2097          */
2098         page_size = ib_umem_find_best_pgoff(
2099                 obj->umem, PAGE_SIZE,
2100                 __mlx5_page_offset_to_bitmask(__mlx5_bit_sz(umem, page_offset),
2101                                               0));
2102         if (!page_size)
2103                 return -EINVAL;
2104
2105         cmd->inlen = MLX5_ST_SZ_BYTES(create_umem_in) +
2106                      (MLX5_ST_SZ_BYTES(mtt) *
2107                       ib_umem_num_dma_blocks(obj->umem, page_size));
2108         cmd->in = uverbs_zalloc(attrs, cmd->inlen);
2109         if (IS_ERR(cmd->in))
2110                 return PTR_ERR(cmd->in);
2111
2112         umem = MLX5_ADDR_OF(create_umem_in, cmd->in, umem);
2113         mtt = (__be64 *)MLX5_ADDR_OF(umem, umem, mtt);
2114
2115         MLX5_SET(create_umem_in, cmd->in, opcode, MLX5_CMD_OP_CREATE_UMEM);
2116         MLX5_SET64(umem, umem, num_of_mtt,
2117                    ib_umem_num_dma_blocks(obj->umem, page_size));
2118         MLX5_SET(umem, umem, log_page_size,
2119                  order_base_2(page_size) - MLX5_ADAPTER_PAGE_SHIFT);
2120         MLX5_SET(umem, umem, page_offset,
2121                  ib_umem_dma_offset(obj->umem, page_size));
2122
2123         mlx5_ib_populate_pas(obj->umem, page_size, mtt,
2124                              (obj->umem->writable ? MLX5_IB_MTT_WRITE : 0) |
2125                                      MLX5_IB_MTT_READ);
2126         return 0;
2127 }
2128
2129 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_UMEM_REG)(
2130         struct uverbs_attr_bundle *attrs)
2131 {
2132         struct devx_umem_reg_cmd cmd;
2133         struct devx_umem *obj;
2134         struct ib_uobject *uobj = uverbs_attr_get_uobject(
2135                 attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE);
2136         u32 obj_id;
2137         struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
2138                 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
2139         struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
2140         int err;
2141
2142         if (!c->devx_uid)
2143                 return -EINVAL;
2144
2145         obj = kzalloc(sizeof(struct devx_umem), GFP_KERNEL);
2146         if (!obj)
2147                 return -ENOMEM;
2148
2149         err = devx_umem_get(dev, &c->ibucontext, attrs, obj);
2150         if (err)
2151                 goto err_obj_free;
2152
2153         err = devx_umem_reg_cmd_alloc(dev, attrs, obj, &cmd);
2154         if (err)
2155                 goto err_umem_release;
2156
2157         MLX5_SET(create_umem_in, cmd.in, uid, c->devx_uid);
2158         err = mlx5_cmd_exec(dev->mdev, cmd.in, cmd.inlen, cmd.out,
2159                             sizeof(cmd.out));
2160         if (err)
2161                 goto err_umem_release;
2162
2163         obj->mdev = dev->mdev;
2164         uobj->object = obj;
2165         devx_obj_build_destroy_cmd(cmd.in, cmd.out, obj->dinbox, &obj->dinlen, &obj_id);
2166         uverbs_finalize_uobj_create(attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE);
2167
2168         err = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_OUT_ID, &obj_id,
2169                              sizeof(obj_id));
2170         return err;
2171
2172 err_umem_release:
2173         ib_umem_release(obj->umem);
2174 err_obj_free:
2175         kfree(obj);
2176         return err;
2177 }
2178
2179 static int devx_umem_cleanup(struct ib_uobject *uobject,
2180                              enum rdma_remove_reason why,
2181                              struct uverbs_attr_bundle *attrs)
2182 {
2183         struct devx_umem *obj = uobject->object;
2184         u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
2185         int err;
2186
2187         err = mlx5_cmd_exec(obj->mdev, obj->dinbox, obj->dinlen, out, sizeof(out));
2188         if (err)
2189                 return err;
2190
2191         ib_umem_release(obj->umem);
2192         kfree(obj);
2193         return 0;
2194 }
2195
2196 static bool is_unaffiliated_event(struct mlx5_core_dev *dev,
2197                                   unsigned long event_type)
2198 {
2199         __be64 *unaff_events;
2200         int mask_entry;
2201         int mask_bit;
2202
2203         if (!MLX5_CAP_GEN(dev, event_cap))
2204                 return is_legacy_unaffiliated_event_num(event_type);
2205
2206         unaff_events = MLX5_CAP_DEV_EVENT(dev,
2207                                           user_unaffiliated_events);
2208         WARN_ON(event_type > MAX_SUPP_EVENT_NUM);
2209
2210         mask_entry = event_type / 64;
2211         mask_bit = event_type % 64;
2212
2213         if (!(be64_to_cpu(unaff_events[mask_entry]) & (1ull << mask_bit)))
2214                 return false;
2215
2216         return true;
2217 }
2218
2219 static u32 devx_get_obj_id_from_event(unsigned long event_type, void *data)
2220 {
2221         struct mlx5_eqe *eqe = data;
2222         u32 obj_id = 0;
2223
2224         switch (event_type) {
2225         case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR:
2226         case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT:
2227         case MLX5_EVENT_TYPE_PATH_MIG:
2228         case MLX5_EVENT_TYPE_COMM_EST:
2229         case MLX5_EVENT_TYPE_SQ_DRAINED:
2230         case MLX5_EVENT_TYPE_SRQ_LAST_WQE:
2231         case MLX5_EVENT_TYPE_WQ_CATAS_ERROR:
2232         case MLX5_EVENT_TYPE_PATH_MIG_FAILED:
2233         case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
2234         case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR:
2235                 obj_id = be32_to_cpu(eqe->data.qp_srq.qp_srq_n) & 0xffffff;
2236                 break;
2237         case MLX5_EVENT_TYPE_XRQ_ERROR:
2238                 obj_id = be32_to_cpu(eqe->data.xrq_err.type_xrqn) & 0xffffff;
2239                 break;
2240         case MLX5_EVENT_TYPE_DCT_DRAINED:
2241         case MLX5_EVENT_TYPE_DCT_KEY_VIOLATION:
2242                 obj_id = be32_to_cpu(eqe->data.dct.dctn) & 0xffffff;
2243                 break;
2244         case MLX5_EVENT_TYPE_CQ_ERROR:
2245                 obj_id = be32_to_cpu(eqe->data.cq_err.cqn) & 0xffffff;
2246                 break;
2247         default:
2248                 obj_id = MLX5_GET(affiliated_event_header, &eqe->data, obj_id);
2249                 break;
2250         }
2251
2252         return obj_id;
2253 }
2254
2255 static int deliver_event(struct devx_event_subscription *event_sub,
2256                          const void *data)
2257 {
2258         struct devx_async_event_file *ev_file;
2259         struct devx_async_event_data *event_data;
2260         unsigned long flags;
2261
2262         ev_file = event_sub->ev_file;
2263
2264         if (ev_file->omit_data) {
2265                 spin_lock_irqsave(&ev_file->lock, flags);
2266                 if (!list_empty(&event_sub->event_list) ||
2267                     ev_file->is_destroyed) {
2268                         spin_unlock_irqrestore(&ev_file->lock, flags);
2269                         return 0;
2270                 }
2271
2272                 list_add_tail(&event_sub->event_list, &ev_file->event_list);
2273                 spin_unlock_irqrestore(&ev_file->lock, flags);
2274                 wake_up_interruptible(&ev_file->poll_wait);
2275                 return 0;
2276         }
2277
2278         event_data = kzalloc(sizeof(*event_data) + sizeof(struct mlx5_eqe),
2279                              GFP_ATOMIC);
2280         if (!event_data) {
2281                 spin_lock_irqsave(&ev_file->lock, flags);
2282                 ev_file->is_overflow_err = 1;
2283                 spin_unlock_irqrestore(&ev_file->lock, flags);
2284                 return -ENOMEM;
2285         }
2286
2287         event_data->hdr.cookie = event_sub->cookie;
2288         memcpy(event_data->hdr.out_data, data, sizeof(struct mlx5_eqe));
2289
2290         spin_lock_irqsave(&ev_file->lock, flags);
2291         if (!ev_file->is_destroyed)
2292                 list_add_tail(&event_data->list, &ev_file->event_list);
2293         else
2294                 kfree(event_data);
2295         spin_unlock_irqrestore(&ev_file->lock, flags);
2296         wake_up_interruptible(&ev_file->poll_wait);
2297
2298         return 0;
2299 }
2300
2301 static void dispatch_event_fd(struct list_head *fd_list,
2302                               const void *data)
2303 {
2304         struct devx_event_subscription *item;
2305
2306         list_for_each_entry_rcu(item, fd_list, xa_list) {
2307                 if (item->eventfd)
2308                         eventfd_signal(item->eventfd, 1);
2309                 else
2310                         deliver_event(item, data);
2311         }
2312 }
2313
2314 static int devx_event_notifier(struct notifier_block *nb,
2315                                unsigned long event_type, void *data)
2316 {
2317         struct mlx5_devx_event_table *table;
2318         struct mlx5_ib_dev *dev;
2319         struct devx_event *event;
2320         struct devx_obj_event *obj_event;
2321         u16 obj_type = 0;
2322         bool is_unaffiliated;
2323         u32 obj_id;
2324
2325         /* Explicit filtering to kernel events which may occur frequently */
2326         if (event_type == MLX5_EVENT_TYPE_CMD ||
2327             event_type == MLX5_EVENT_TYPE_PAGE_REQUEST)
2328                 return NOTIFY_OK;
2329
2330         table = container_of(nb, struct mlx5_devx_event_table, devx_nb.nb);
2331         dev = container_of(table, struct mlx5_ib_dev, devx_event_table);
2332         is_unaffiliated = is_unaffiliated_event(dev->mdev, event_type);
2333
2334         if (!is_unaffiliated)
2335                 obj_type = get_event_obj_type(event_type, data);
2336
2337         rcu_read_lock();
2338         event = xa_load(&table->event_xa, event_type | (obj_type << 16));
2339         if (!event) {
2340                 rcu_read_unlock();
2341                 return NOTIFY_DONE;
2342         }
2343
2344         if (is_unaffiliated) {
2345                 dispatch_event_fd(&event->unaffiliated_list, data);
2346                 rcu_read_unlock();
2347                 return NOTIFY_OK;
2348         }
2349
2350         obj_id = devx_get_obj_id_from_event(event_type, data);
2351         obj_event = xa_load(&event->object_ids, obj_id);
2352         if (!obj_event) {
2353                 rcu_read_unlock();
2354                 return NOTIFY_DONE;
2355         }
2356
2357         dispatch_event_fd(&obj_event->obj_sub_list, data);
2358
2359         rcu_read_unlock();
2360         return NOTIFY_OK;
2361 }
2362
2363 int mlx5_ib_devx_init(struct mlx5_ib_dev *dev)
2364 {
2365         struct mlx5_devx_event_table *table = &dev->devx_event_table;
2366         int uid;
2367
2368         uid = mlx5_ib_devx_create(dev, false);
2369         if (uid > 0) {
2370                 dev->devx_whitelist_uid = uid;
2371                 xa_init(&table->event_xa);
2372                 mutex_init(&table->event_xa_lock);
2373                 MLX5_NB_INIT(&table->devx_nb, devx_event_notifier, NOTIFY_ANY);
2374                 mlx5_eq_notifier_register(dev->mdev, &table->devx_nb);
2375         }
2376
2377         return 0;
2378 }
2379
2380 void mlx5_ib_devx_cleanup(struct mlx5_ib_dev *dev)
2381 {
2382         struct mlx5_devx_event_table *table = &dev->devx_event_table;
2383         struct devx_event_subscription *sub, *tmp;
2384         struct devx_event *event;
2385         void *entry;
2386         unsigned long id;
2387
2388         if (dev->devx_whitelist_uid) {
2389                 mlx5_eq_notifier_unregister(dev->mdev, &table->devx_nb);
2390                 mutex_lock(&dev->devx_event_table.event_xa_lock);
2391                 xa_for_each(&table->event_xa, id, entry) {
2392                         event = entry;
2393                         list_for_each_entry_safe(
2394                                 sub, tmp, &event->unaffiliated_list, xa_list)
2395                                 devx_cleanup_subscription(dev, sub);
2396                         kfree(entry);
2397                 }
2398                 mutex_unlock(&dev->devx_event_table.event_xa_lock);
2399                 xa_destroy(&table->event_xa);
2400
2401                 mlx5_ib_devx_destroy(dev, dev->devx_whitelist_uid);
2402         }
2403 }
2404
2405 static ssize_t devx_async_cmd_event_read(struct file *filp, char __user *buf,
2406                                          size_t count, loff_t *pos)
2407 {
2408         struct devx_async_cmd_event_file *comp_ev_file = filp->private_data;
2409         struct devx_async_event_queue *ev_queue = &comp_ev_file->ev_queue;
2410         struct devx_async_data *event;
2411         int ret = 0;
2412         size_t eventsz;
2413
2414         spin_lock_irq(&ev_queue->lock);
2415
2416         while (list_empty(&ev_queue->event_list)) {
2417                 spin_unlock_irq(&ev_queue->lock);
2418
2419                 if (filp->f_flags & O_NONBLOCK)
2420                         return -EAGAIN;
2421
2422                 if (wait_event_interruptible(
2423                             ev_queue->poll_wait,
2424                             (!list_empty(&ev_queue->event_list) ||
2425                              ev_queue->is_destroyed))) {
2426                         return -ERESTARTSYS;
2427                 }
2428
2429                 spin_lock_irq(&ev_queue->lock);
2430                 if (ev_queue->is_destroyed) {
2431                         spin_unlock_irq(&ev_queue->lock);
2432                         return -EIO;
2433                 }
2434         }
2435
2436         event = list_entry(ev_queue->event_list.next,
2437                            struct devx_async_data, list);
2438         eventsz = event->cmd_out_len +
2439                         sizeof(struct mlx5_ib_uapi_devx_async_cmd_hdr);
2440
2441         if (eventsz > count) {
2442                 spin_unlock_irq(&ev_queue->lock);
2443                 return -ENOSPC;
2444         }
2445
2446         list_del(ev_queue->event_list.next);
2447         spin_unlock_irq(&ev_queue->lock);
2448
2449         if (copy_to_user(buf, &event->hdr, eventsz))
2450                 ret = -EFAULT;
2451         else
2452                 ret = eventsz;
2453
2454         atomic_sub(event->cmd_out_len, &ev_queue->bytes_in_use);
2455         kvfree(event);
2456         return ret;
2457 }
2458
2459 static __poll_t devx_async_cmd_event_poll(struct file *filp,
2460                                               struct poll_table_struct *wait)
2461 {
2462         struct devx_async_cmd_event_file *comp_ev_file = filp->private_data;
2463         struct devx_async_event_queue *ev_queue = &comp_ev_file->ev_queue;
2464         __poll_t pollflags = 0;
2465
2466         poll_wait(filp, &ev_queue->poll_wait, wait);
2467
2468         spin_lock_irq(&ev_queue->lock);
2469         if (ev_queue->is_destroyed)
2470                 pollflags = EPOLLIN | EPOLLRDNORM | EPOLLRDHUP;
2471         else if (!list_empty(&ev_queue->event_list))
2472                 pollflags = EPOLLIN | EPOLLRDNORM;
2473         spin_unlock_irq(&ev_queue->lock);
2474
2475         return pollflags;
2476 }
2477
2478 static const struct file_operations devx_async_cmd_event_fops = {
2479         .owner   = THIS_MODULE,
2480         .read    = devx_async_cmd_event_read,
2481         .poll    = devx_async_cmd_event_poll,
2482         .release = uverbs_uobject_fd_release,
2483         .llseek  = no_llseek,
2484 };
2485
2486 static ssize_t devx_async_event_read(struct file *filp, char __user *buf,
2487                                      size_t count, loff_t *pos)
2488 {
2489         struct devx_async_event_file *ev_file = filp->private_data;
2490         struct devx_event_subscription *event_sub;
2491         struct devx_async_event_data *event;
2492         int ret = 0;
2493         size_t eventsz;
2494         bool omit_data;
2495         void *event_data;
2496
2497         omit_data = ev_file->omit_data;
2498
2499         spin_lock_irq(&ev_file->lock);
2500
2501         if (ev_file->is_overflow_err) {
2502                 ev_file->is_overflow_err = 0;
2503                 spin_unlock_irq(&ev_file->lock);
2504                 return -EOVERFLOW;
2505         }
2506
2507
2508         while (list_empty(&ev_file->event_list)) {
2509                 spin_unlock_irq(&ev_file->lock);
2510
2511                 if (filp->f_flags & O_NONBLOCK)
2512                         return -EAGAIN;
2513
2514                 if (wait_event_interruptible(ev_file->poll_wait,
2515                             (!list_empty(&ev_file->event_list) ||
2516                              ev_file->is_destroyed))) {
2517                         return -ERESTARTSYS;
2518                 }
2519
2520                 spin_lock_irq(&ev_file->lock);
2521                 if (ev_file->is_destroyed) {
2522                         spin_unlock_irq(&ev_file->lock);
2523                         return -EIO;
2524                 }
2525         }
2526
2527         if (omit_data) {
2528                 event_sub = list_first_entry(&ev_file->event_list,
2529                                         struct devx_event_subscription,
2530                                         event_list);
2531                 eventsz = sizeof(event_sub->cookie);
2532                 event_data = &event_sub->cookie;
2533         } else {
2534                 event = list_first_entry(&ev_file->event_list,
2535                                       struct devx_async_event_data, list);
2536                 eventsz = sizeof(struct mlx5_eqe) +
2537                         sizeof(struct mlx5_ib_uapi_devx_async_event_hdr);
2538                 event_data = &event->hdr;
2539         }
2540
2541         if (eventsz > count) {
2542                 spin_unlock_irq(&ev_file->lock);
2543                 return -EINVAL;
2544         }
2545
2546         if (omit_data)
2547                 list_del_init(&event_sub->event_list);
2548         else
2549                 list_del(&event->list);
2550
2551         spin_unlock_irq(&ev_file->lock);
2552
2553         if (copy_to_user(buf, event_data, eventsz))
2554                 /* This points to an application issue, not a kernel concern */
2555                 ret = -EFAULT;
2556         else
2557                 ret = eventsz;
2558
2559         if (!omit_data)
2560                 kfree(event);
2561         return ret;
2562 }
2563
2564 static __poll_t devx_async_event_poll(struct file *filp,
2565                                       struct poll_table_struct *wait)
2566 {
2567         struct devx_async_event_file *ev_file = filp->private_data;
2568         __poll_t pollflags = 0;
2569
2570         poll_wait(filp, &ev_file->poll_wait, wait);
2571
2572         spin_lock_irq(&ev_file->lock);
2573         if (ev_file->is_destroyed)
2574                 pollflags = EPOLLIN | EPOLLRDNORM | EPOLLRDHUP;
2575         else if (!list_empty(&ev_file->event_list))
2576                 pollflags = EPOLLIN | EPOLLRDNORM;
2577         spin_unlock_irq(&ev_file->lock);
2578
2579         return pollflags;
2580 }
2581
2582 static void devx_free_subscription(struct rcu_head *rcu)
2583 {
2584         struct devx_event_subscription *event_sub =
2585                 container_of(rcu, struct devx_event_subscription, rcu);
2586
2587         if (event_sub->eventfd)
2588                 eventfd_ctx_put(event_sub->eventfd);
2589         uverbs_uobject_put(&event_sub->ev_file->uobj);
2590         kfree(event_sub);
2591 }
2592
2593 static const struct file_operations devx_async_event_fops = {
2594         .owner   = THIS_MODULE,
2595         .read    = devx_async_event_read,
2596         .poll    = devx_async_event_poll,
2597         .release = uverbs_uobject_fd_release,
2598         .llseek  = no_llseek,
2599 };
2600
2601 static void devx_async_cmd_event_destroy_uobj(struct ib_uobject *uobj,
2602                                               enum rdma_remove_reason why)
2603 {
2604         struct devx_async_cmd_event_file *comp_ev_file =
2605                 container_of(uobj, struct devx_async_cmd_event_file,
2606                              uobj);
2607         struct devx_async_event_queue *ev_queue = &comp_ev_file->ev_queue;
2608         struct devx_async_data *entry, *tmp;
2609
2610         spin_lock_irq(&ev_queue->lock);
2611         ev_queue->is_destroyed = 1;
2612         spin_unlock_irq(&ev_queue->lock);
2613         wake_up_interruptible(&ev_queue->poll_wait);
2614
2615         mlx5_cmd_cleanup_async_ctx(&comp_ev_file->async_ctx);
2616
2617         spin_lock_irq(&comp_ev_file->ev_queue.lock);
2618         list_for_each_entry_safe(entry, tmp,
2619                                  &comp_ev_file->ev_queue.event_list, list) {
2620                 list_del(&entry->list);
2621                 kvfree(entry);
2622         }
2623         spin_unlock_irq(&comp_ev_file->ev_queue.lock);
2624 };
2625
2626 static void devx_async_event_destroy_uobj(struct ib_uobject *uobj,
2627                                           enum rdma_remove_reason why)
2628 {
2629         struct devx_async_event_file *ev_file =
2630                 container_of(uobj, struct devx_async_event_file,
2631                              uobj);
2632         struct devx_event_subscription *event_sub, *event_sub_tmp;
2633         struct mlx5_ib_dev *dev = ev_file->dev;
2634
2635         spin_lock_irq(&ev_file->lock);
2636         ev_file->is_destroyed = 1;
2637
2638         /* free the pending events allocation */
2639         if (ev_file->omit_data) {
2640                 struct devx_event_subscription *event_sub, *tmp;
2641
2642                 list_for_each_entry_safe(event_sub, tmp, &ev_file->event_list,
2643                                          event_list)
2644                         list_del_init(&event_sub->event_list);
2645
2646         } else {
2647                 struct devx_async_event_data *entry, *tmp;
2648
2649                 list_for_each_entry_safe(entry, tmp, &ev_file->event_list,
2650                                          list) {
2651                         list_del(&entry->list);
2652                         kfree(entry);
2653                 }
2654         }
2655
2656         spin_unlock_irq(&ev_file->lock);
2657         wake_up_interruptible(&ev_file->poll_wait);
2658
2659         mutex_lock(&dev->devx_event_table.event_xa_lock);
2660         /* delete the subscriptions which are related to this FD */
2661         list_for_each_entry_safe(event_sub, event_sub_tmp,
2662                                  &ev_file->subscribed_events_list, file_list) {
2663                 devx_cleanup_subscription(dev, event_sub);
2664                 list_del_rcu(&event_sub->file_list);
2665                 /* subscription may not be used by the read API any more */
2666                 call_rcu(&event_sub->rcu, devx_free_subscription);
2667         }
2668         mutex_unlock(&dev->devx_event_table.event_xa_lock);
2669
2670         put_device(&dev->ib_dev.dev);
2671 };
2672
2673 DECLARE_UVERBS_NAMED_METHOD(
2674         MLX5_IB_METHOD_DEVX_UMEM_REG,
2675         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE,
2676                         MLX5_IB_OBJECT_DEVX_UMEM,
2677                         UVERBS_ACCESS_NEW,
2678                         UA_MANDATORY),
2679         UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_ADDR,
2680                            UVERBS_ATTR_TYPE(u64),
2681                            UA_MANDATORY),
2682         UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_LEN,
2683                            UVERBS_ATTR_TYPE(u64),
2684                            UA_MANDATORY),
2685         UVERBS_ATTR_FLAGS_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_ACCESS,
2686                              enum ib_access_flags),
2687         UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_DEVX_UMEM_REG_OUT_ID,
2688                             UVERBS_ATTR_TYPE(u32),
2689                             UA_MANDATORY));
2690
2691 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
2692         MLX5_IB_METHOD_DEVX_UMEM_DEREG,
2693         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_UMEM_DEREG_HANDLE,
2694                         MLX5_IB_OBJECT_DEVX_UMEM,
2695                         UVERBS_ACCESS_DESTROY,
2696                         UA_MANDATORY));
2697
2698 DECLARE_UVERBS_NAMED_METHOD(
2699         MLX5_IB_METHOD_DEVX_QUERY_EQN,
2700         UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_QUERY_EQN_USER_VEC,
2701                            UVERBS_ATTR_TYPE(u32),
2702                            UA_MANDATORY),
2703         UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_DEVX_QUERY_EQN_DEV_EQN,
2704                             UVERBS_ATTR_TYPE(u32),
2705                             UA_MANDATORY));
2706
2707 DECLARE_UVERBS_NAMED_METHOD(
2708         MLX5_IB_METHOD_DEVX_QUERY_UAR,
2709         UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_QUERY_UAR_USER_IDX,
2710                            UVERBS_ATTR_TYPE(u32),
2711                            UA_MANDATORY),
2712         UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_DEVX_QUERY_UAR_DEV_IDX,
2713                             UVERBS_ATTR_TYPE(u32),
2714                             UA_MANDATORY));
2715
2716 DECLARE_UVERBS_NAMED_METHOD(
2717         MLX5_IB_METHOD_DEVX_OTHER,
2718         UVERBS_ATTR_PTR_IN(
2719                 MLX5_IB_ATTR_DEVX_OTHER_CMD_IN,
2720                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2721                 UA_MANDATORY,
2722                 UA_ALLOC_AND_COPY),
2723         UVERBS_ATTR_PTR_OUT(
2724                 MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT,
2725                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
2726                 UA_MANDATORY));
2727
2728 DECLARE_UVERBS_NAMED_METHOD(
2729         MLX5_IB_METHOD_DEVX_OBJ_CREATE,
2730         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_CREATE_HANDLE,
2731                         MLX5_IB_OBJECT_DEVX_OBJ,
2732                         UVERBS_ACCESS_NEW,
2733                         UA_MANDATORY),
2734         UVERBS_ATTR_PTR_IN(
2735                 MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN,
2736                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2737                 UA_MANDATORY,
2738                 UA_ALLOC_AND_COPY),
2739         UVERBS_ATTR_PTR_OUT(
2740                 MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT,
2741                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
2742                 UA_MANDATORY));
2743
2744 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
2745         MLX5_IB_METHOD_DEVX_OBJ_DESTROY,
2746         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_DESTROY_HANDLE,
2747                         MLX5_IB_OBJECT_DEVX_OBJ,
2748                         UVERBS_ACCESS_DESTROY,
2749                         UA_MANDATORY));
2750
2751 DECLARE_UVERBS_NAMED_METHOD(
2752         MLX5_IB_METHOD_DEVX_OBJ_MODIFY,
2753         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_MODIFY_HANDLE,
2754                         UVERBS_IDR_ANY_OBJECT,
2755                         UVERBS_ACCESS_WRITE,
2756                         UA_MANDATORY),
2757         UVERBS_ATTR_PTR_IN(
2758                 MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN,
2759                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2760                 UA_MANDATORY,
2761                 UA_ALLOC_AND_COPY),
2762         UVERBS_ATTR_PTR_OUT(
2763                 MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT,
2764                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
2765                 UA_MANDATORY));
2766
2767 DECLARE_UVERBS_NAMED_METHOD(
2768         MLX5_IB_METHOD_DEVX_OBJ_QUERY,
2769         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_QUERY_HANDLE,
2770                         UVERBS_IDR_ANY_OBJECT,
2771                         UVERBS_ACCESS_READ,
2772                         UA_MANDATORY),
2773         UVERBS_ATTR_PTR_IN(
2774                 MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN,
2775                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2776                 UA_MANDATORY,
2777                 UA_ALLOC_AND_COPY),
2778         UVERBS_ATTR_PTR_OUT(
2779                 MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT,
2780                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
2781                 UA_MANDATORY));
2782
2783 DECLARE_UVERBS_NAMED_METHOD(
2784         MLX5_IB_METHOD_DEVX_OBJ_ASYNC_QUERY,
2785         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_QUERY_HANDLE,
2786                         UVERBS_IDR_ANY_OBJECT,
2787                         UVERBS_ACCESS_READ,
2788                         UA_MANDATORY),
2789         UVERBS_ATTR_PTR_IN(
2790                 MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN,
2791                 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2792                 UA_MANDATORY,
2793                 UA_ALLOC_AND_COPY),
2794         UVERBS_ATTR_CONST_IN(MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_OUT_LEN,
2795                 u16, UA_MANDATORY),
2796         UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_FD,
2797                 MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
2798                 UVERBS_ACCESS_READ,
2799                 UA_MANDATORY),
2800         UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_WR_ID,
2801                 UVERBS_ATTR_TYPE(u64),
2802                 UA_MANDATORY));
2803
2804 DECLARE_UVERBS_NAMED_METHOD(
2805         MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT,
2806         UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_HANDLE,
2807                 MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
2808                 UVERBS_ACCESS_READ,
2809                 UA_MANDATORY),
2810         UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_OBJ_HANDLE,
2811                 MLX5_IB_OBJECT_DEVX_OBJ,
2812                 UVERBS_ACCESS_READ,
2813                 UA_OPTIONAL),
2814         UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_TYPE_NUM_LIST,
2815                 UVERBS_ATTR_MIN_SIZE(sizeof(u16)),
2816                 UA_MANDATORY,
2817                 UA_ALLOC_AND_COPY),
2818         UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_COOKIE,
2819                 UVERBS_ATTR_TYPE(u64),
2820                 UA_OPTIONAL),
2821         UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_NUM,
2822                 UVERBS_ATTR_TYPE(u32),
2823                 UA_OPTIONAL));
2824
2825 DECLARE_UVERBS_GLOBAL_METHODS(MLX5_IB_OBJECT_DEVX,
2826                               &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OTHER),
2827                               &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_QUERY_UAR),
2828                               &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_QUERY_EQN),
2829                               &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT));
2830
2831 DECLARE_UVERBS_NAMED_OBJECT(MLX5_IB_OBJECT_DEVX_OBJ,
2832                             UVERBS_TYPE_ALLOC_IDR(devx_obj_cleanup),
2833                             &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_CREATE),
2834                             &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_DESTROY),
2835                             &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_MODIFY),
2836                             &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_QUERY),
2837                             &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_ASYNC_QUERY));
2838
2839 DECLARE_UVERBS_NAMED_OBJECT(MLX5_IB_OBJECT_DEVX_UMEM,
2840                             UVERBS_TYPE_ALLOC_IDR(devx_umem_cleanup),
2841                             &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_UMEM_REG),
2842                             &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_UMEM_DEREG));
2843
2844
2845 DECLARE_UVERBS_NAMED_METHOD(
2846         MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC,
2847         UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_ASYNC_CMD_FD_ALLOC_HANDLE,
2848                         MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
2849                         UVERBS_ACCESS_NEW,
2850                         UA_MANDATORY));
2851
2852 DECLARE_UVERBS_NAMED_OBJECT(
2853         MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
2854         UVERBS_TYPE_ALLOC_FD(sizeof(struct devx_async_cmd_event_file),
2855                              devx_async_cmd_event_destroy_uobj,
2856                              &devx_async_cmd_event_fops, "[devx_async_cmd]",
2857                              O_RDONLY),
2858         &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC));
2859
2860 DECLARE_UVERBS_NAMED_METHOD(
2861         MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC,
2862         UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_HANDLE,
2863                         MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
2864                         UVERBS_ACCESS_NEW,
2865                         UA_MANDATORY),
2866         UVERBS_ATTR_FLAGS_IN(MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_FLAGS,
2867                         enum mlx5_ib_uapi_devx_create_event_channel_flags,
2868                         UA_MANDATORY));
2869
2870 DECLARE_UVERBS_NAMED_OBJECT(
2871         MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
2872         UVERBS_TYPE_ALLOC_FD(sizeof(struct devx_async_event_file),
2873                              devx_async_event_destroy_uobj,
2874                              &devx_async_event_fops, "[devx_async_event]",
2875                              O_RDONLY),
2876         &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC));
2877
2878 static bool devx_is_supported(struct ib_device *device)
2879 {
2880         struct mlx5_ib_dev *dev = to_mdev(device);
2881
2882         return MLX5_CAP_GEN(dev->mdev, log_max_uctx);
2883 }
2884
2885 const struct uapi_definition mlx5_ib_devx_defs[] = {
2886         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
2887                 MLX5_IB_OBJECT_DEVX,
2888                 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
2889         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
2890                 MLX5_IB_OBJECT_DEVX_OBJ,
2891                 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
2892         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
2893                 MLX5_IB_OBJECT_DEVX_UMEM,
2894                 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
2895         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
2896                 MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
2897                 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
2898         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
2899                 MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
2900                 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
2901         {},
2902 };