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 <linux/xarray.h> 18 19 #define UVERBS_MODULE_NAME mlx5_ib 20 #include <rdma/uverbs_named_ioctl.h> 21 22 static void dispatch_event_fd(struct list_head *fd_list, const void *data); 23 24 enum devx_obj_flags { 25 DEVX_OBJ_FLAGS_INDIRECT_MKEY = 1 << 0, 26 DEVX_OBJ_FLAGS_DCT = 1 << 1, 27 DEVX_OBJ_FLAGS_CQ = 1 << 2, 28 }; 29 30 struct devx_async_data { 31 struct mlx5_ib_dev *mdev; 32 struct list_head list; 33 struct ib_uobject *fd_uobj; 34 struct mlx5_async_work cb_work; 35 u16 cmd_out_len; 36 /* must be last field in this structure */ 37 struct mlx5_ib_uapi_devx_async_cmd_hdr hdr; 38 }; 39 40 struct devx_async_event_data { 41 struct list_head list; /* headed in ev_file->event_list */ 42 struct mlx5_ib_uapi_devx_async_event_hdr hdr; 43 }; 44 45 /* first level XA value data structure */ 46 struct devx_event { 47 struct xarray object_ids; /* second XA level, Key = object id */ 48 struct list_head unaffiliated_list; 49 }; 50 51 /* second level XA value data structure */ 52 struct devx_obj_event { 53 struct rcu_head rcu; 54 struct list_head obj_sub_list; 55 }; 56 57 struct devx_event_subscription { 58 struct list_head file_list; /* headed in ev_file-> 59 * subscribed_events_list 60 */ 61 struct list_head xa_list; /* headed in devx_event->unaffiliated_list or 62 * devx_obj_event->obj_sub_list 63 */ 64 struct list_head obj_list; /* headed in devx_object */ 65 struct list_head event_list; /* headed in ev_file->event_list or in 66 * temp list via subscription 67 */ 68 69 u8 is_cleaned:1; 70 u32 xa_key_level1; 71 u32 xa_key_level2; 72 struct rcu_head rcu; 73 u64 cookie; 74 struct devx_async_event_file *ev_file; 75 struct file *filp; /* Upon hot unplug we need a direct access to */ 76 struct eventfd_ctx *eventfd; 77 }; 78 79 struct devx_async_event_file { 80 struct ib_uobject uobj; 81 /* Head of events that are subscribed to this FD */ 82 struct list_head subscribed_events_list; 83 spinlock_t lock; 84 wait_queue_head_t poll_wait; 85 struct list_head event_list; 86 struct mlx5_ib_dev *dev; 87 u8 omit_data:1; 88 u8 is_overflow_err:1; 89 u8 is_destroyed:1; 90 }; 91 92 #define MLX5_MAX_DESTROY_INBOX_SIZE_DW MLX5_ST_SZ_DW(delete_fte_in) 93 struct devx_obj { 94 struct mlx5_ib_dev *ib_dev; 95 u64 obj_id; 96 u32 dinlen; /* destroy inbox length */ 97 u32 dinbox[MLX5_MAX_DESTROY_INBOX_SIZE_DW]; 98 u32 flags; 99 union { 100 struct mlx5_ib_devx_mr devx_mr; 101 struct mlx5_core_dct core_dct; 102 struct mlx5_core_cq core_cq; 103 }; 104 struct list_head event_sub; /* holds devx_event_subscription entries */ 105 }; 106 107 struct devx_umem { 108 struct mlx5_core_dev *mdev; 109 struct ib_umem *umem; 110 u32 page_offset; 111 int page_shift; 112 int ncont; 113 u32 dinlen; 114 u32 dinbox[MLX5_ST_SZ_DW(general_obj_in_cmd_hdr)]; 115 }; 116 117 struct devx_umem_reg_cmd { 118 void *in; 119 u32 inlen; 120 u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)]; 121 }; 122 123 static struct mlx5_ib_ucontext * 124 devx_ufile2uctx(const struct uverbs_attr_bundle *attrs) 125 { 126 return to_mucontext(ib_uverbs_get_ucontext(attrs)); 127 } 128 129 int mlx5_ib_devx_create(struct mlx5_ib_dev *dev, bool is_user) 130 { 131 u32 in[MLX5_ST_SZ_DW(create_uctx_in)] = {0}; 132 u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)] = {0}; 133 void *uctx; 134 int err; 135 u16 uid; 136 u32 cap = 0; 137 138 /* 0 means not supported */ 139 if (!MLX5_CAP_GEN(dev->mdev, log_max_uctx)) 140 return -EINVAL; 141 142 uctx = MLX5_ADDR_OF(create_uctx_in, in, uctx); 143 if (is_user && capable(CAP_NET_RAW) && 144 (MLX5_CAP_GEN(dev->mdev, uctx_cap) & MLX5_UCTX_CAP_RAW_TX)) 145 cap |= MLX5_UCTX_CAP_RAW_TX; 146 if (is_user && capable(CAP_SYS_RAWIO) && 147 (MLX5_CAP_GEN(dev->mdev, uctx_cap) & 148 MLX5_UCTX_CAP_INTERNAL_DEV_RES)) 149 cap |= MLX5_UCTX_CAP_INTERNAL_DEV_RES; 150 151 MLX5_SET(create_uctx_in, in, opcode, MLX5_CMD_OP_CREATE_UCTX); 152 MLX5_SET(uctx, uctx, cap, cap); 153 154 err = mlx5_cmd_exec(dev->mdev, in, sizeof(in), out, sizeof(out)); 155 if (err) 156 return err; 157 158 uid = MLX5_GET(general_obj_out_cmd_hdr, out, obj_id); 159 return uid; 160 } 161 162 void mlx5_ib_devx_destroy(struct mlx5_ib_dev *dev, u16 uid) 163 { 164 u32 in[MLX5_ST_SZ_DW(destroy_uctx_in)] = {0}; 165 u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)] = {0}; 166 167 MLX5_SET(destroy_uctx_in, in, opcode, MLX5_CMD_OP_DESTROY_UCTX); 168 MLX5_SET(destroy_uctx_in, in, uid, uid); 169 170 mlx5_cmd_exec(dev->mdev, in, sizeof(in), out, sizeof(out)); 171 } 172 173 bool mlx5_ib_devx_is_flow_dest(void *obj, int *dest_id, int *dest_type) 174 { 175 struct devx_obj *devx_obj = obj; 176 u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, devx_obj->dinbox, opcode); 177 178 switch (opcode) { 179 case MLX5_CMD_OP_DESTROY_TIR: 180 *dest_type = MLX5_FLOW_DESTINATION_TYPE_TIR; 181 *dest_id = MLX5_GET(general_obj_in_cmd_hdr, devx_obj->dinbox, 182 obj_id); 183 return true; 184 185 case MLX5_CMD_OP_DESTROY_FLOW_TABLE: 186 *dest_type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE; 187 *dest_id = MLX5_GET(destroy_flow_table_in, devx_obj->dinbox, 188 table_id); 189 return true; 190 default: 191 return false; 192 } 193 } 194 195 bool mlx5_ib_devx_is_flow_counter(void *obj, u32 *counter_id) 196 { 197 struct devx_obj *devx_obj = obj; 198 u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, devx_obj->dinbox, opcode); 199 200 if (opcode == MLX5_CMD_OP_DEALLOC_FLOW_COUNTER) { 201 *counter_id = MLX5_GET(dealloc_flow_counter_in, 202 devx_obj->dinbox, 203 flow_counter_id); 204 return true; 205 } 206 207 return false; 208 } 209 210 static bool is_legacy_unaffiliated_event_num(u16 event_num) 211 { 212 switch (event_num) { 213 case MLX5_EVENT_TYPE_PORT_CHANGE: 214 return true; 215 default: 216 return false; 217 } 218 } 219 220 static bool is_legacy_obj_event_num(u16 event_num) 221 { 222 switch (event_num) { 223 case MLX5_EVENT_TYPE_PATH_MIG: 224 case MLX5_EVENT_TYPE_COMM_EST: 225 case MLX5_EVENT_TYPE_SQ_DRAINED: 226 case MLX5_EVENT_TYPE_SRQ_LAST_WQE: 227 case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT: 228 case MLX5_EVENT_TYPE_CQ_ERROR: 229 case MLX5_EVENT_TYPE_WQ_CATAS_ERROR: 230 case MLX5_EVENT_TYPE_PATH_MIG_FAILED: 231 case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR: 232 case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR: 233 case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR: 234 case MLX5_EVENT_TYPE_DCT_DRAINED: 235 case MLX5_EVENT_TYPE_COMP: 236 return true; 237 default: 238 return false; 239 } 240 } 241 242 static u16 get_legacy_obj_type(u16 opcode) 243 { 244 switch (opcode) { 245 case MLX5_CMD_OP_CREATE_RQ: 246 return MLX5_EVENT_QUEUE_TYPE_RQ; 247 case MLX5_CMD_OP_CREATE_QP: 248 return MLX5_EVENT_QUEUE_TYPE_QP; 249 case MLX5_CMD_OP_CREATE_SQ: 250 return MLX5_EVENT_QUEUE_TYPE_SQ; 251 case MLX5_CMD_OP_CREATE_DCT: 252 return MLX5_EVENT_QUEUE_TYPE_DCT; 253 default: 254 return 0; 255 } 256 } 257 258 static u16 get_dec_obj_type(struct devx_obj *obj, u16 event_num) 259 { 260 u16 opcode; 261 262 opcode = (obj->obj_id >> 32) & 0xffff; 263 264 if (is_legacy_obj_event_num(event_num)) 265 return get_legacy_obj_type(opcode); 266 267 switch (opcode) { 268 case MLX5_CMD_OP_CREATE_GENERAL_OBJECT: 269 return (obj->obj_id >> 48); 270 case MLX5_CMD_OP_CREATE_RQ: 271 return MLX5_OBJ_TYPE_RQ; 272 case MLX5_CMD_OP_CREATE_QP: 273 return MLX5_OBJ_TYPE_QP; 274 case MLX5_CMD_OP_CREATE_SQ: 275 return MLX5_OBJ_TYPE_SQ; 276 case MLX5_CMD_OP_CREATE_DCT: 277 return MLX5_OBJ_TYPE_DCT; 278 case MLX5_CMD_OP_CREATE_TIR: 279 return MLX5_OBJ_TYPE_TIR; 280 case MLX5_CMD_OP_CREATE_TIS: 281 return MLX5_OBJ_TYPE_TIS; 282 case MLX5_CMD_OP_CREATE_PSV: 283 return MLX5_OBJ_TYPE_PSV; 284 case MLX5_OBJ_TYPE_MKEY: 285 return MLX5_OBJ_TYPE_MKEY; 286 case MLX5_CMD_OP_CREATE_RMP: 287 return MLX5_OBJ_TYPE_RMP; 288 case MLX5_CMD_OP_CREATE_XRC_SRQ: 289 return MLX5_OBJ_TYPE_XRC_SRQ; 290 case MLX5_CMD_OP_CREATE_XRQ: 291 return MLX5_OBJ_TYPE_XRQ; 292 case MLX5_CMD_OP_CREATE_RQT: 293 return MLX5_OBJ_TYPE_RQT; 294 case MLX5_CMD_OP_ALLOC_FLOW_COUNTER: 295 return MLX5_OBJ_TYPE_FLOW_COUNTER; 296 case MLX5_CMD_OP_CREATE_CQ: 297 return MLX5_OBJ_TYPE_CQ; 298 default: 299 return 0; 300 } 301 } 302 303 static u16 get_event_obj_type(unsigned long event_type, struct mlx5_eqe *eqe) 304 { 305 switch (event_type) { 306 case MLX5_EVENT_TYPE_WQ_CATAS_ERROR: 307 case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR: 308 case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR: 309 case MLX5_EVENT_TYPE_SRQ_LAST_WQE: 310 case MLX5_EVENT_TYPE_PATH_MIG: 311 case MLX5_EVENT_TYPE_PATH_MIG_FAILED: 312 case MLX5_EVENT_TYPE_COMM_EST: 313 case MLX5_EVENT_TYPE_SQ_DRAINED: 314 case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT: 315 case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR: 316 return eqe->data.qp_srq.type; 317 case MLX5_EVENT_TYPE_CQ_ERROR: 318 return 0; 319 case MLX5_EVENT_TYPE_DCT_DRAINED: 320 return MLX5_EVENT_QUEUE_TYPE_DCT; 321 default: 322 return MLX5_GET(affiliated_event_header, &eqe->data, obj_type); 323 } 324 } 325 326 static u32 get_dec_obj_id(u64 obj_id) 327 { 328 return (obj_id & 0xffffffff); 329 } 330 331 /* 332 * As the obj_id in the firmware is not globally unique the object type 333 * must be considered upon checking for a valid object id. 334 * For that the opcode of the creator command is encoded as part of the obj_id. 335 */ 336 static u64 get_enc_obj_id(u32 opcode, u32 obj_id) 337 { 338 return ((u64)opcode << 32) | obj_id; 339 } 340 341 static u64 devx_get_obj_id(const void *in) 342 { 343 u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode); 344 u64 obj_id; 345 346 switch (opcode) { 347 case MLX5_CMD_OP_MODIFY_GENERAL_OBJECT: 348 case MLX5_CMD_OP_QUERY_GENERAL_OBJECT: 349 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_GENERAL_OBJECT | 350 MLX5_GET(general_obj_in_cmd_hdr, in, 351 obj_type) << 16, 352 MLX5_GET(general_obj_in_cmd_hdr, in, 353 obj_id)); 354 break; 355 case MLX5_CMD_OP_QUERY_MKEY: 356 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_MKEY, 357 MLX5_GET(query_mkey_in, in, 358 mkey_index)); 359 break; 360 case MLX5_CMD_OP_QUERY_CQ: 361 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_CQ, 362 MLX5_GET(query_cq_in, in, cqn)); 363 break; 364 case MLX5_CMD_OP_MODIFY_CQ: 365 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_CQ, 366 MLX5_GET(modify_cq_in, in, cqn)); 367 break; 368 case MLX5_CMD_OP_QUERY_SQ: 369 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SQ, 370 MLX5_GET(query_sq_in, in, sqn)); 371 break; 372 case MLX5_CMD_OP_MODIFY_SQ: 373 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SQ, 374 MLX5_GET(modify_sq_in, in, sqn)); 375 break; 376 case MLX5_CMD_OP_QUERY_RQ: 377 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ, 378 MLX5_GET(query_rq_in, in, rqn)); 379 break; 380 case MLX5_CMD_OP_MODIFY_RQ: 381 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ, 382 MLX5_GET(modify_rq_in, in, rqn)); 383 break; 384 case MLX5_CMD_OP_QUERY_RMP: 385 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RMP, 386 MLX5_GET(query_rmp_in, in, rmpn)); 387 break; 388 case MLX5_CMD_OP_MODIFY_RMP: 389 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RMP, 390 MLX5_GET(modify_rmp_in, in, rmpn)); 391 break; 392 case MLX5_CMD_OP_QUERY_RQT: 393 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQT, 394 MLX5_GET(query_rqt_in, in, rqtn)); 395 break; 396 case MLX5_CMD_OP_MODIFY_RQT: 397 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQT, 398 MLX5_GET(modify_rqt_in, in, rqtn)); 399 break; 400 case MLX5_CMD_OP_QUERY_TIR: 401 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_TIR, 402 MLX5_GET(query_tir_in, in, tirn)); 403 break; 404 case MLX5_CMD_OP_MODIFY_TIR: 405 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_TIR, 406 MLX5_GET(modify_tir_in, in, tirn)); 407 break; 408 case MLX5_CMD_OP_QUERY_TIS: 409 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_TIS, 410 MLX5_GET(query_tis_in, in, tisn)); 411 break; 412 case MLX5_CMD_OP_MODIFY_TIS: 413 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_TIS, 414 MLX5_GET(modify_tis_in, in, tisn)); 415 break; 416 case MLX5_CMD_OP_QUERY_FLOW_TABLE: 417 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_FLOW_TABLE, 418 MLX5_GET(query_flow_table_in, in, 419 table_id)); 420 break; 421 case MLX5_CMD_OP_MODIFY_FLOW_TABLE: 422 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_FLOW_TABLE, 423 MLX5_GET(modify_flow_table_in, in, 424 table_id)); 425 break; 426 case MLX5_CMD_OP_QUERY_FLOW_GROUP: 427 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_FLOW_GROUP, 428 MLX5_GET(query_flow_group_in, in, 429 group_id)); 430 break; 431 case MLX5_CMD_OP_QUERY_FLOW_TABLE_ENTRY: 432 obj_id = get_enc_obj_id(MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY, 433 MLX5_GET(query_fte_in, in, 434 flow_index)); 435 break; 436 case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY: 437 obj_id = get_enc_obj_id(MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY, 438 MLX5_GET(set_fte_in, in, flow_index)); 439 break; 440 case MLX5_CMD_OP_QUERY_Q_COUNTER: 441 obj_id = get_enc_obj_id(MLX5_CMD_OP_ALLOC_Q_COUNTER, 442 MLX5_GET(query_q_counter_in, in, 443 counter_set_id)); 444 break; 445 case MLX5_CMD_OP_QUERY_FLOW_COUNTER: 446 obj_id = get_enc_obj_id(MLX5_CMD_OP_ALLOC_FLOW_COUNTER, 447 MLX5_GET(query_flow_counter_in, in, 448 flow_counter_id)); 449 break; 450 case MLX5_CMD_OP_QUERY_MODIFY_HEADER_CONTEXT: 451 obj_id = get_enc_obj_id(MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT, 452 MLX5_GET(general_obj_in_cmd_hdr, in, 453 obj_id)); 454 break; 455 case MLX5_CMD_OP_QUERY_SCHEDULING_ELEMENT: 456 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT, 457 MLX5_GET(query_scheduling_element_in, 458 in, scheduling_element_id)); 459 break; 460 case MLX5_CMD_OP_MODIFY_SCHEDULING_ELEMENT: 461 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT, 462 MLX5_GET(modify_scheduling_element_in, 463 in, scheduling_element_id)); 464 break; 465 case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT: 466 obj_id = get_enc_obj_id(MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT, 467 MLX5_GET(add_vxlan_udp_dport_in, in, 468 vxlan_udp_port)); 469 break; 470 case MLX5_CMD_OP_QUERY_L2_TABLE_ENTRY: 471 obj_id = get_enc_obj_id(MLX5_CMD_OP_SET_L2_TABLE_ENTRY, 472 MLX5_GET(query_l2_table_entry_in, in, 473 table_index)); 474 break; 475 case MLX5_CMD_OP_SET_L2_TABLE_ENTRY: 476 obj_id = get_enc_obj_id(MLX5_CMD_OP_SET_L2_TABLE_ENTRY, 477 MLX5_GET(set_l2_table_entry_in, in, 478 table_index)); 479 break; 480 case MLX5_CMD_OP_QUERY_QP: 481 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP, 482 MLX5_GET(query_qp_in, in, qpn)); 483 break; 484 case MLX5_CMD_OP_RST2INIT_QP: 485 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP, 486 MLX5_GET(rst2init_qp_in, in, qpn)); 487 break; 488 case MLX5_CMD_OP_INIT2RTR_QP: 489 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP, 490 MLX5_GET(init2rtr_qp_in, in, qpn)); 491 break; 492 case MLX5_CMD_OP_RTR2RTS_QP: 493 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP, 494 MLX5_GET(rtr2rts_qp_in, in, qpn)); 495 break; 496 case MLX5_CMD_OP_RTS2RTS_QP: 497 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP, 498 MLX5_GET(rts2rts_qp_in, in, qpn)); 499 break; 500 case MLX5_CMD_OP_SQERR2RTS_QP: 501 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP, 502 MLX5_GET(sqerr2rts_qp_in, in, qpn)); 503 break; 504 case MLX5_CMD_OP_2ERR_QP: 505 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP, 506 MLX5_GET(qp_2err_in, in, qpn)); 507 break; 508 case MLX5_CMD_OP_2RST_QP: 509 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP, 510 MLX5_GET(qp_2rst_in, in, qpn)); 511 break; 512 case MLX5_CMD_OP_QUERY_DCT: 513 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_DCT, 514 MLX5_GET(query_dct_in, in, dctn)); 515 break; 516 case MLX5_CMD_OP_QUERY_XRQ: 517 case MLX5_CMD_OP_QUERY_XRQ_DC_PARAMS_ENTRY: 518 case MLX5_CMD_OP_QUERY_XRQ_ERROR_PARAMS: 519 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_XRQ, 520 MLX5_GET(query_xrq_in, in, xrqn)); 521 break; 522 case MLX5_CMD_OP_QUERY_XRC_SRQ: 523 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_XRC_SRQ, 524 MLX5_GET(query_xrc_srq_in, in, 525 xrc_srqn)); 526 break; 527 case MLX5_CMD_OP_ARM_XRC_SRQ: 528 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_XRC_SRQ, 529 MLX5_GET(arm_xrc_srq_in, in, xrc_srqn)); 530 break; 531 case MLX5_CMD_OP_QUERY_SRQ: 532 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SRQ, 533 MLX5_GET(query_srq_in, in, srqn)); 534 break; 535 case MLX5_CMD_OP_ARM_RQ: 536 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ, 537 MLX5_GET(arm_rq_in, in, srq_number)); 538 break; 539 case MLX5_CMD_OP_ARM_DCT_FOR_KEY_VIOLATION: 540 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_DCT, 541 MLX5_GET(drain_dct_in, in, dctn)); 542 break; 543 case MLX5_CMD_OP_ARM_XRQ: 544 case MLX5_CMD_OP_SET_XRQ_DC_PARAMS_ENTRY: 545 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_XRQ, 546 MLX5_GET(arm_xrq_in, in, xrqn)); 547 break; 548 case MLX5_CMD_OP_QUERY_PACKET_REFORMAT_CONTEXT: 549 obj_id = get_enc_obj_id 550 (MLX5_CMD_OP_ALLOC_PACKET_REFORMAT_CONTEXT, 551 MLX5_GET(query_packet_reformat_context_in, 552 in, packet_reformat_id)); 553 break; 554 default: 555 obj_id = 0; 556 } 557 558 return obj_id; 559 } 560 561 static bool devx_is_valid_obj_id(struct uverbs_attr_bundle *attrs, 562 struct ib_uobject *uobj, const void *in) 563 { 564 struct mlx5_ib_dev *dev = mlx5_udata_to_mdev(&attrs->driver_udata); 565 u64 obj_id = devx_get_obj_id(in); 566 567 if (!obj_id) 568 return false; 569 570 switch (uobj_get_object_id(uobj)) { 571 case UVERBS_OBJECT_CQ: 572 return get_enc_obj_id(MLX5_CMD_OP_CREATE_CQ, 573 to_mcq(uobj->object)->mcq.cqn) == 574 obj_id; 575 576 case UVERBS_OBJECT_SRQ: 577 { 578 struct mlx5_core_srq *srq = &(to_msrq(uobj->object)->msrq); 579 u16 opcode; 580 581 switch (srq->common.res) { 582 case MLX5_RES_XSRQ: 583 opcode = MLX5_CMD_OP_CREATE_XRC_SRQ; 584 break; 585 case MLX5_RES_XRQ: 586 opcode = MLX5_CMD_OP_CREATE_XRQ; 587 break; 588 default: 589 if (!dev->mdev->issi) 590 opcode = MLX5_CMD_OP_CREATE_SRQ; 591 else 592 opcode = MLX5_CMD_OP_CREATE_RMP; 593 } 594 595 return get_enc_obj_id(opcode, 596 to_msrq(uobj->object)->msrq.srqn) == 597 obj_id; 598 } 599 600 case UVERBS_OBJECT_QP: 601 { 602 struct mlx5_ib_qp *qp = to_mqp(uobj->object); 603 enum ib_qp_type qp_type = qp->ibqp.qp_type; 604 605 if (qp_type == IB_QPT_RAW_PACKET || 606 (qp->flags & MLX5_IB_QP_UNDERLAY)) { 607 struct mlx5_ib_raw_packet_qp *raw_packet_qp = 608 &qp->raw_packet_qp; 609 struct mlx5_ib_rq *rq = &raw_packet_qp->rq; 610 struct mlx5_ib_sq *sq = &raw_packet_qp->sq; 611 612 return (get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ, 613 rq->base.mqp.qpn) == obj_id || 614 get_enc_obj_id(MLX5_CMD_OP_CREATE_SQ, 615 sq->base.mqp.qpn) == obj_id || 616 get_enc_obj_id(MLX5_CMD_OP_CREATE_TIR, 617 rq->tirn) == obj_id || 618 get_enc_obj_id(MLX5_CMD_OP_CREATE_TIS, 619 sq->tisn) == obj_id); 620 } 621 622 if (qp_type == MLX5_IB_QPT_DCT) 623 return get_enc_obj_id(MLX5_CMD_OP_CREATE_DCT, 624 qp->dct.mdct.mqp.qpn) == obj_id; 625 626 return get_enc_obj_id(MLX5_CMD_OP_CREATE_QP, 627 qp->ibqp.qp_num) == obj_id; 628 } 629 630 case UVERBS_OBJECT_WQ: 631 return get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ, 632 to_mrwq(uobj->object)->core_qp.qpn) == 633 obj_id; 634 635 case UVERBS_OBJECT_RWQ_IND_TBL: 636 return get_enc_obj_id(MLX5_CMD_OP_CREATE_RQT, 637 to_mrwq_ind_table(uobj->object)->rqtn) == 638 obj_id; 639 640 case MLX5_IB_OBJECT_DEVX_OBJ: 641 return ((struct devx_obj *)uobj->object)->obj_id == obj_id; 642 643 default: 644 return false; 645 } 646 } 647 648 static void devx_set_umem_valid(const void *in) 649 { 650 u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode); 651 652 switch (opcode) { 653 case MLX5_CMD_OP_CREATE_MKEY: 654 MLX5_SET(create_mkey_in, in, mkey_umem_valid, 1); 655 break; 656 case MLX5_CMD_OP_CREATE_CQ: 657 { 658 void *cqc; 659 660 MLX5_SET(create_cq_in, in, cq_umem_valid, 1); 661 cqc = MLX5_ADDR_OF(create_cq_in, in, cq_context); 662 MLX5_SET(cqc, cqc, dbr_umem_valid, 1); 663 break; 664 } 665 case MLX5_CMD_OP_CREATE_QP: 666 { 667 void *qpc; 668 669 qpc = MLX5_ADDR_OF(create_qp_in, in, qpc); 670 MLX5_SET(qpc, qpc, dbr_umem_valid, 1); 671 MLX5_SET(create_qp_in, in, wq_umem_valid, 1); 672 break; 673 } 674 675 case MLX5_CMD_OP_CREATE_RQ: 676 { 677 void *rqc, *wq; 678 679 rqc = MLX5_ADDR_OF(create_rq_in, in, ctx); 680 wq = MLX5_ADDR_OF(rqc, rqc, wq); 681 MLX5_SET(wq, wq, dbr_umem_valid, 1); 682 MLX5_SET(wq, wq, wq_umem_valid, 1); 683 break; 684 } 685 686 case MLX5_CMD_OP_CREATE_SQ: 687 { 688 void *sqc, *wq; 689 690 sqc = MLX5_ADDR_OF(create_sq_in, in, ctx); 691 wq = MLX5_ADDR_OF(sqc, sqc, wq); 692 MLX5_SET(wq, wq, dbr_umem_valid, 1); 693 MLX5_SET(wq, wq, wq_umem_valid, 1); 694 break; 695 } 696 697 case MLX5_CMD_OP_MODIFY_CQ: 698 MLX5_SET(modify_cq_in, in, cq_umem_valid, 1); 699 break; 700 701 case MLX5_CMD_OP_CREATE_RMP: 702 { 703 void *rmpc, *wq; 704 705 rmpc = MLX5_ADDR_OF(create_rmp_in, in, ctx); 706 wq = MLX5_ADDR_OF(rmpc, rmpc, wq); 707 MLX5_SET(wq, wq, dbr_umem_valid, 1); 708 MLX5_SET(wq, wq, wq_umem_valid, 1); 709 break; 710 } 711 712 case MLX5_CMD_OP_CREATE_XRQ: 713 { 714 void *xrqc, *wq; 715 716 xrqc = MLX5_ADDR_OF(create_xrq_in, in, xrq_context); 717 wq = MLX5_ADDR_OF(xrqc, xrqc, wq); 718 MLX5_SET(wq, wq, dbr_umem_valid, 1); 719 MLX5_SET(wq, wq, wq_umem_valid, 1); 720 break; 721 } 722 723 case MLX5_CMD_OP_CREATE_XRC_SRQ: 724 { 725 void *xrc_srqc; 726 727 MLX5_SET(create_xrc_srq_in, in, xrc_srq_umem_valid, 1); 728 xrc_srqc = MLX5_ADDR_OF(create_xrc_srq_in, in, 729 xrc_srq_context_entry); 730 MLX5_SET(xrc_srqc, xrc_srqc, dbr_umem_valid, 1); 731 break; 732 } 733 734 default: 735 return; 736 } 737 } 738 739 static bool devx_is_obj_create_cmd(const void *in, u16 *opcode) 740 { 741 *opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode); 742 743 switch (*opcode) { 744 case MLX5_CMD_OP_CREATE_GENERAL_OBJECT: 745 case MLX5_CMD_OP_CREATE_MKEY: 746 case MLX5_CMD_OP_CREATE_CQ: 747 case MLX5_CMD_OP_ALLOC_PD: 748 case MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN: 749 case MLX5_CMD_OP_CREATE_RMP: 750 case MLX5_CMD_OP_CREATE_SQ: 751 case MLX5_CMD_OP_CREATE_RQ: 752 case MLX5_CMD_OP_CREATE_RQT: 753 case MLX5_CMD_OP_CREATE_TIR: 754 case MLX5_CMD_OP_CREATE_TIS: 755 case MLX5_CMD_OP_ALLOC_Q_COUNTER: 756 case MLX5_CMD_OP_CREATE_FLOW_TABLE: 757 case MLX5_CMD_OP_CREATE_FLOW_GROUP: 758 case MLX5_CMD_OP_ALLOC_FLOW_COUNTER: 759 case MLX5_CMD_OP_ALLOC_PACKET_REFORMAT_CONTEXT: 760 case MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT: 761 case MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT: 762 case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT: 763 case MLX5_CMD_OP_SET_L2_TABLE_ENTRY: 764 case MLX5_CMD_OP_CREATE_QP: 765 case MLX5_CMD_OP_CREATE_SRQ: 766 case MLX5_CMD_OP_CREATE_XRC_SRQ: 767 case MLX5_CMD_OP_CREATE_DCT: 768 case MLX5_CMD_OP_CREATE_XRQ: 769 case MLX5_CMD_OP_ATTACH_TO_MCG: 770 case MLX5_CMD_OP_ALLOC_XRCD: 771 return true; 772 case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY: 773 { 774 u16 op_mod = MLX5_GET(set_fte_in, in, op_mod); 775 if (op_mod == 0) 776 return true; 777 return false; 778 } 779 default: 780 return false; 781 } 782 } 783 784 static bool devx_is_obj_modify_cmd(const void *in) 785 { 786 u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode); 787 788 switch (opcode) { 789 case MLX5_CMD_OP_MODIFY_GENERAL_OBJECT: 790 case MLX5_CMD_OP_MODIFY_CQ: 791 case MLX5_CMD_OP_MODIFY_RMP: 792 case MLX5_CMD_OP_MODIFY_SQ: 793 case MLX5_CMD_OP_MODIFY_RQ: 794 case MLX5_CMD_OP_MODIFY_RQT: 795 case MLX5_CMD_OP_MODIFY_TIR: 796 case MLX5_CMD_OP_MODIFY_TIS: 797 case MLX5_CMD_OP_MODIFY_FLOW_TABLE: 798 case MLX5_CMD_OP_MODIFY_SCHEDULING_ELEMENT: 799 case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT: 800 case MLX5_CMD_OP_SET_L2_TABLE_ENTRY: 801 case MLX5_CMD_OP_RST2INIT_QP: 802 case MLX5_CMD_OP_INIT2RTR_QP: 803 case MLX5_CMD_OP_RTR2RTS_QP: 804 case MLX5_CMD_OP_RTS2RTS_QP: 805 case MLX5_CMD_OP_SQERR2RTS_QP: 806 case MLX5_CMD_OP_2ERR_QP: 807 case MLX5_CMD_OP_2RST_QP: 808 case MLX5_CMD_OP_ARM_XRC_SRQ: 809 case MLX5_CMD_OP_ARM_RQ: 810 case MLX5_CMD_OP_ARM_DCT_FOR_KEY_VIOLATION: 811 case MLX5_CMD_OP_ARM_XRQ: 812 case MLX5_CMD_OP_SET_XRQ_DC_PARAMS_ENTRY: 813 return true; 814 case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY: 815 { 816 u16 op_mod = MLX5_GET(set_fte_in, in, op_mod); 817 818 if (op_mod == 1) 819 return true; 820 return false; 821 } 822 default: 823 return false; 824 } 825 } 826 827 static bool devx_is_obj_query_cmd(const void *in) 828 { 829 u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode); 830 831 switch (opcode) { 832 case MLX5_CMD_OP_QUERY_GENERAL_OBJECT: 833 case MLX5_CMD_OP_QUERY_MKEY: 834 case MLX5_CMD_OP_QUERY_CQ: 835 case MLX5_CMD_OP_QUERY_RMP: 836 case MLX5_CMD_OP_QUERY_SQ: 837 case MLX5_CMD_OP_QUERY_RQ: 838 case MLX5_CMD_OP_QUERY_RQT: 839 case MLX5_CMD_OP_QUERY_TIR: 840 case MLX5_CMD_OP_QUERY_TIS: 841 case MLX5_CMD_OP_QUERY_Q_COUNTER: 842 case MLX5_CMD_OP_QUERY_FLOW_TABLE: 843 case MLX5_CMD_OP_QUERY_FLOW_GROUP: 844 case MLX5_CMD_OP_QUERY_FLOW_TABLE_ENTRY: 845 case MLX5_CMD_OP_QUERY_FLOW_COUNTER: 846 case MLX5_CMD_OP_QUERY_MODIFY_HEADER_CONTEXT: 847 case MLX5_CMD_OP_QUERY_SCHEDULING_ELEMENT: 848 case MLX5_CMD_OP_QUERY_L2_TABLE_ENTRY: 849 case MLX5_CMD_OP_QUERY_QP: 850 case MLX5_CMD_OP_QUERY_SRQ: 851 case MLX5_CMD_OP_QUERY_XRC_SRQ: 852 case MLX5_CMD_OP_QUERY_DCT: 853 case MLX5_CMD_OP_QUERY_XRQ: 854 case MLX5_CMD_OP_QUERY_XRQ_DC_PARAMS_ENTRY: 855 case MLX5_CMD_OP_QUERY_XRQ_ERROR_PARAMS: 856 case MLX5_CMD_OP_QUERY_PACKET_REFORMAT_CONTEXT: 857 return true; 858 default: 859 return false; 860 } 861 } 862 863 static bool devx_is_whitelist_cmd(void *in) 864 { 865 u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode); 866 867 switch (opcode) { 868 case MLX5_CMD_OP_QUERY_HCA_CAP: 869 case MLX5_CMD_OP_QUERY_HCA_VPORT_CONTEXT: 870 case MLX5_CMD_OP_QUERY_ESW_VPORT_CONTEXT: 871 return true; 872 default: 873 return false; 874 } 875 } 876 877 static int devx_get_uid(struct mlx5_ib_ucontext *c, void *cmd_in) 878 { 879 if (devx_is_whitelist_cmd(cmd_in)) { 880 struct mlx5_ib_dev *dev; 881 882 if (c->devx_uid) 883 return c->devx_uid; 884 885 dev = to_mdev(c->ibucontext.device); 886 if (dev->devx_whitelist_uid) 887 return dev->devx_whitelist_uid; 888 889 return -EOPNOTSUPP; 890 } 891 892 if (!c->devx_uid) 893 return -EINVAL; 894 895 return c->devx_uid; 896 } 897 898 static bool devx_is_general_cmd(void *in, struct mlx5_ib_dev *dev) 899 { 900 u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode); 901 902 /* Pass all cmds for vhca_tunnel as general, tracking is done in FW */ 903 if ((MLX5_CAP_GEN_64(dev->mdev, vhca_tunnel_commands) && 904 MLX5_GET(general_obj_in_cmd_hdr, in, vhca_tunnel_id)) || 905 (opcode >= MLX5_CMD_OP_GENERAL_START && 906 opcode < MLX5_CMD_OP_GENERAL_END)) 907 return true; 908 909 switch (opcode) { 910 case MLX5_CMD_OP_QUERY_HCA_CAP: 911 case MLX5_CMD_OP_QUERY_HCA_VPORT_CONTEXT: 912 case MLX5_CMD_OP_QUERY_ESW_VPORT_CONTEXT: 913 case MLX5_CMD_OP_QUERY_VPORT_STATE: 914 case MLX5_CMD_OP_QUERY_ADAPTER: 915 case MLX5_CMD_OP_QUERY_ISSI: 916 case MLX5_CMD_OP_QUERY_NIC_VPORT_CONTEXT: 917 case MLX5_CMD_OP_QUERY_ROCE_ADDRESS: 918 case MLX5_CMD_OP_QUERY_VNIC_ENV: 919 case MLX5_CMD_OP_QUERY_VPORT_COUNTER: 920 case MLX5_CMD_OP_GET_DROPPED_PACKET_LOG: 921 case MLX5_CMD_OP_NOP: 922 case MLX5_CMD_OP_QUERY_CONG_STATUS: 923 case MLX5_CMD_OP_QUERY_CONG_PARAMS: 924 case MLX5_CMD_OP_QUERY_CONG_STATISTICS: 925 case MLX5_CMD_OP_QUERY_LAG: 926 return true; 927 default: 928 return false; 929 } 930 } 931 932 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_QUERY_EQN)( 933 struct uverbs_attr_bundle *attrs) 934 { 935 struct mlx5_ib_ucontext *c; 936 struct mlx5_ib_dev *dev; 937 int user_vector; 938 int dev_eqn; 939 unsigned int irqn; 940 int err; 941 942 if (uverbs_copy_from(&user_vector, attrs, 943 MLX5_IB_ATTR_DEVX_QUERY_EQN_USER_VEC)) 944 return -EFAULT; 945 946 c = devx_ufile2uctx(attrs); 947 if (IS_ERR(c)) 948 return PTR_ERR(c); 949 dev = to_mdev(c->ibucontext.device); 950 951 err = mlx5_vector2eqn(dev->mdev, user_vector, &dev_eqn, &irqn); 952 if (err < 0) 953 return err; 954 955 if (uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_QUERY_EQN_DEV_EQN, 956 &dev_eqn, sizeof(dev_eqn))) 957 return -EFAULT; 958 959 return 0; 960 } 961 962 /* 963 *Security note: 964 * The hardware protection mechanism works like this: Each device object that 965 * is subject to UAR doorbells (QP/SQ/CQ) gets a UAR ID (called uar_page in 966 * the device specification manual) upon its creation. Then upon doorbell, 967 * hardware fetches the object context for which the doorbell was rang, and 968 * validates that the UAR through which the DB was rang matches the UAR ID 969 * of the object. 970 * If no match the doorbell is silently ignored by the hardware. Of course, 971 * the user cannot ring a doorbell on a UAR that was not mapped to it. 972 * Now in devx, as the devx kernel does not manipulate the QP/SQ/CQ command 973 * mailboxes (except tagging them with UID), we expose to the user its UAR 974 * ID, so it can embed it in these objects in the expected specification 975 * format. So the only thing the user can do is hurt itself by creating a 976 * QP/SQ/CQ with a UAR ID other than his, and then in this case other users 977 * may ring a doorbell on its objects. 978 * The consequence of that will be that another user can schedule a QP/SQ 979 * of the buggy user for execution (just insert it to the hardware schedule 980 * queue or arm its CQ for event generation), no further harm is expected. 981 */ 982 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_QUERY_UAR)( 983 struct uverbs_attr_bundle *attrs) 984 { 985 struct mlx5_ib_ucontext *c; 986 struct mlx5_ib_dev *dev; 987 u32 user_idx; 988 s32 dev_idx; 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 if (uverbs_copy_from(&user_idx, attrs, 996 MLX5_IB_ATTR_DEVX_QUERY_UAR_USER_IDX)) 997 return -EFAULT; 998 999 dev_idx = bfregn_to_uar_index(dev, &c->bfregi, user_idx, true); 1000 if (dev_idx < 0) 1001 return dev_idx; 1002 1003 if (uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_QUERY_UAR_DEV_IDX, 1004 &dev_idx, sizeof(dev_idx))) 1005 return -EFAULT; 1006 1007 return 0; 1008 } 1009 1010 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OTHER)( 1011 struct uverbs_attr_bundle *attrs) 1012 { 1013 struct mlx5_ib_ucontext *c; 1014 struct mlx5_ib_dev *dev; 1015 void *cmd_in = uverbs_attr_get_alloced_ptr( 1016 attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_IN); 1017 int cmd_out_len = uverbs_attr_get_len(attrs, 1018 MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT); 1019 void *cmd_out; 1020 int err; 1021 int uid; 1022 1023 c = devx_ufile2uctx(attrs); 1024 if (IS_ERR(c)) 1025 return PTR_ERR(c); 1026 dev = to_mdev(c->ibucontext.device); 1027 1028 uid = devx_get_uid(c, cmd_in); 1029 if (uid < 0) 1030 return uid; 1031 1032 /* Only white list of some general HCA commands are allowed for this method. */ 1033 if (!devx_is_general_cmd(cmd_in, dev)) 1034 return -EINVAL; 1035 1036 cmd_out = uverbs_zalloc(attrs, cmd_out_len); 1037 if (IS_ERR(cmd_out)) 1038 return PTR_ERR(cmd_out); 1039 1040 MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid); 1041 err = mlx5_cmd_exec(dev->mdev, cmd_in, 1042 uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_IN), 1043 cmd_out, cmd_out_len); 1044 if (err) 1045 return err; 1046 1047 return uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT, cmd_out, 1048 cmd_out_len); 1049 } 1050 1051 static void devx_obj_build_destroy_cmd(void *in, void *out, void *din, 1052 u32 *dinlen, 1053 u32 *obj_id) 1054 { 1055 u16 obj_type = MLX5_GET(general_obj_in_cmd_hdr, in, obj_type); 1056 u16 uid = MLX5_GET(general_obj_in_cmd_hdr, in, uid); 1057 1058 *obj_id = MLX5_GET(general_obj_out_cmd_hdr, out, obj_id); 1059 *dinlen = MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr); 1060 1061 MLX5_SET(general_obj_in_cmd_hdr, din, obj_id, *obj_id); 1062 MLX5_SET(general_obj_in_cmd_hdr, din, uid, uid); 1063 1064 switch (MLX5_GET(general_obj_in_cmd_hdr, in, opcode)) { 1065 case MLX5_CMD_OP_CREATE_GENERAL_OBJECT: 1066 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_GENERAL_OBJECT); 1067 MLX5_SET(general_obj_in_cmd_hdr, din, obj_type, obj_type); 1068 break; 1069 1070 case MLX5_CMD_OP_CREATE_UMEM: 1071 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, 1072 MLX5_CMD_OP_DESTROY_UMEM); 1073 break; 1074 case MLX5_CMD_OP_CREATE_MKEY: 1075 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_MKEY); 1076 break; 1077 case MLX5_CMD_OP_CREATE_CQ: 1078 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_CQ); 1079 break; 1080 case MLX5_CMD_OP_ALLOC_PD: 1081 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DEALLOC_PD); 1082 break; 1083 case MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN: 1084 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, 1085 MLX5_CMD_OP_DEALLOC_TRANSPORT_DOMAIN); 1086 break; 1087 case MLX5_CMD_OP_CREATE_RMP: 1088 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_RMP); 1089 break; 1090 case MLX5_CMD_OP_CREATE_SQ: 1091 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_SQ); 1092 break; 1093 case MLX5_CMD_OP_CREATE_RQ: 1094 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_RQ); 1095 break; 1096 case MLX5_CMD_OP_CREATE_RQT: 1097 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_RQT); 1098 break; 1099 case MLX5_CMD_OP_CREATE_TIR: 1100 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_TIR); 1101 break; 1102 case MLX5_CMD_OP_CREATE_TIS: 1103 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_TIS); 1104 break; 1105 case MLX5_CMD_OP_ALLOC_Q_COUNTER: 1106 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, 1107 MLX5_CMD_OP_DEALLOC_Q_COUNTER); 1108 break; 1109 case MLX5_CMD_OP_CREATE_FLOW_TABLE: 1110 *dinlen = MLX5_ST_SZ_BYTES(destroy_flow_table_in); 1111 *obj_id = MLX5_GET(create_flow_table_out, out, table_id); 1112 MLX5_SET(destroy_flow_table_in, din, other_vport, 1113 MLX5_GET(create_flow_table_in, in, other_vport)); 1114 MLX5_SET(destroy_flow_table_in, din, vport_number, 1115 MLX5_GET(create_flow_table_in, in, vport_number)); 1116 MLX5_SET(destroy_flow_table_in, din, table_type, 1117 MLX5_GET(create_flow_table_in, in, table_type)); 1118 MLX5_SET(destroy_flow_table_in, din, table_id, *obj_id); 1119 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, 1120 MLX5_CMD_OP_DESTROY_FLOW_TABLE); 1121 break; 1122 case MLX5_CMD_OP_CREATE_FLOW_GROUP: 1123 *dinlen = MLX5_ST_SZ_BYTES(destroy_flow_group_in); 1124 *obj_id = MLX5_GET(create_flow_group_out, out, group_id); 1125 MLX5_SET(destroy_flow_group_in, din, other_vport, 1126 MLX5_GET(create_flow_group_in, in, other_vport)); 1127 MLX5_SET(destroy_flow_group_in, din, vport_number, 1128 MLX5_GET(create_flow_group_in, in, vport_number)); 1129 MLX5_SET(destroy_flow_group_in, din, table_type, 1130 MLX5_GET(create_flow_group_in, in, table_type)); 1131 MLX5_SET(destroy_flow_group_in, din, table_id, 1132 MLX5_GET(create_flow_group_in, in, table_id)); 1133 MLX5_SET(destroy_flow_group_in, din, group_id, *obj_id); 1134 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, 1135 MLX5_CMD_OP_DESTROY_FLOW_GROUP); 1136 break; 1137 case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY: 1138 *dinlen = MLX5_ST_SZ_BYTES(delete_fte_in); 1139 *obj_id = MLX5_GET(set_fte_in, in, flow_index); 1140 MLX5_SET(delete_fte_in, din, other_vport, 1141 MLX5_GET(set_fte_in, in, other_vport)); 1142 MLX5_SET(delete_fte_in, din, vport_number, 1143 MLX5_GET(set_fte_in, in, vport_number)); 1144 MLX5_SET(delete_fte_in, din, table_type, 1145 MLX5_GET(set_fte_in, in, table_type)); 1146 MLX5_SET(delete_fte_in, din, table_id, 1147 MLX5_GET(set_fte_in, in, table_id)); 1148 MLX5_SET(delete_fte_in, din, flow_index, *obj_id); 1149 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, 1150 MLX5_CMD_OP_DELETE_FLOW_TABLE_ENTRY); 1151 break; 1152 case MLX5_CMD_OP_ALLOC_FLOW_COUNTER: 1153 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, 1154 MLX5_CMD_OP_DEALLOC_FLOW_COUNTER); 1155 break; 1156 case MLX5_CMD_OP_ALLOC_PACKET_REFORMAT_CONTEXT: 1157 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, 1158 MLX5_CMD_OP_DEALLOC_PACKET_REFORMAT_CONTEXT); 1159 break; 1160 case MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT: 1161 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, 1162 MLX5_CMD_OP_DEALLOC_MODIFY_HEADER_CONTEXT); 1163 break; 1164 case MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT: 1165 *dinlen = MLX5_ST_SZ_BYTES(destroy_scheduling_element_in); 1166 *obj_id = MLX5_GET(create_scheduling_element_out, out, 1167 scheduling_element_id); 1168 MLX5_SET(destroy_scheduling_element_in, din, 1169 scheduling_hierarchy, 1170 MLX5_GET(create_scheduling_element_in, in, 1171 scheduling_hierarchy)); 1172 MLX5_SET(destroy_scheduling_element_in, din, 1173 scheduling_element_id, *obj_id); 1174 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, 1175 MLX5_CMD_OP_DESTROY_SCHEDULING_ELEMENT); 1176 break; 1177 case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT: 1178 *dinlen = MLX5_ST_SZ_BYTES(delete_vxlan_udp_dport_in); 1179 *obj_id = MLX5_GET(add_vxlan_udp_dport_in, in, vxlan_udp_port); 1180 MLX5_SET(delete_vxlan_udp_dport_in, din, vxlan_udp_port, *obj_id); 1181 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, 1182 MLX5_CMD_OP_DELETE_VXLAN_UDP_DPORT); 1183 break; 1184 case MLX5_CMD_OP_SET_L2_TABLE_ENTRY: 1185 *dinlen = MLX5_ST_SZ_BYTES(delete_l2_table_entry_in); 1186 *obj_id = MLX5_GET(set_l2_table_entry_in, in, table_index); 1187 MLX5_SET(delete_l2_table_entry_in, din, table_index, *obj_id); 1188 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, 1189 MLX5_CMD_OP_DELETE_L2_TABLE_ENTRY); 1190 break; 1191 case MLX5_CMD_OP_CREATE_QP: 1192 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_QP); 1193 break; 1194 case MLX5_CMD_OP_CREATE_SRQ: 1195 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_SRQ); 1196 break; 1197 case MLX5_CMD_OP_CREATE_XRC_SRQ: 1198 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, 1199 MLX5_CMD_OP_DESTROY_XRC_SRQ); 1200 break; 1201 case MLX5_CMD_OP_CREATE_DCT: 1202 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_DCT); 1203 break; 1204 case MLX5_CMD_OP_CREATE_XRQ: 1205 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_XRQ); 1206 break; 1207 case MLX5_CMD_OP_ATTACH_TO_MCG: 1208 *dinlen = MLX5_ST_SZ_BYTES(detach_from_mcg_in); 1209 MLX5_SET(detach_from_mcg_in, din, qpn, 1210 MLX5_GET(attach_to_mcg_in, in, qpn)); 1211 memcpy(MLX5_ADDR_OF(detach_from_mcg_in, din, multicast_gid), 1212 MLX5_ADDR_OF(attach_to_mcg_in, in, multicast_gid), 1213 MLX5_FLD_SZ_BYTES(attach_to_mcg_in, multicast_gid)); 1214 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DETACH_FROM_MCG); 1215 break; 1216 case MLX5_CMD_OP_ALLOC_XRCD: 1217 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DEALLOC_XRCD); 1218 break; 1219 default: 1220 /* The entry must match to one of the devx_is_obj_create_cmd */ 1221 WARN_ON(true); 1222 break; 1223 } 1224 } 1225 1226 static int devx_handle_mkey_indirect(struct devx_obj *obj, 1227 struct mlx5_ib_dev *dev, 1228 void *in, void *out) 1229 { 1230 struct mlx5_ib_devx_mr *devx_mr = &obj->devx_mr; 1231 struct mlx5_core_mkey *mkey; 1232 void *mkc; 1233 u8 key; 1234 1235 mkey = &devx_mr->mmkey; 1236 mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry); 1237 key = MLX5_GET(mkc, mkc, mkey_7_0); 1238 mkey->key = mlx5_idx_to_mkey( 1239 MLX5_GET(create_mkey_out, out, mkey_index)) | key; 1240 mkey->type = MLX5_MKEY_INDIRECT_DEVX; 1241 mkey->iova = MLX5_GET64(mkc, mkc, start_addr); 1242 mkey->size = MLX5_GET64(mkc, mkc, len); 1243 mkey->pd = MLX5_GET(mkc, mkc, pd); 1244 devx_mr->ndescs = MLX5_GET(mkc, mkc, translations_octword_size); 1245 1246 return xa_err(xa_store(&dev->mdev->priv.mkey_table, 1247 mlx5_base_mkey(mkey->key), mkey, GFP_KERNEL)); 1248 } 1249 1250 static int devx_handle_mkey_create(struct mlx5_ib_dev *dev, 1251 struct devx_obj *obj, 1252 void *in, int in_len) 1253 { 1254 int min_len = MLX5_BYTE_OFF(create_mkey_in, memory_key_mkey_entry) + 1255 MLX5_FLD_SZ_BYTES(create_mkey_in, 1256 memory_key_mkey_entry); 1257 void *mkc; 1258 u8 access_mode; 1259 1260 if (in_len < min_len) 1261 return -EINVAL; 1262 1263 mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry); 1264 1265 access_mode = MLX5_GET(mkc, mkc, access_mode_1_0); 1266 access_mode |= MLX5_GET(mkc, mkc, access_mode_4_2) << 2; 1267 1268 if (access_mode == MLX5_MKC_ACCESS_MODE_KLMS || 1269 access_mode == MLX5_MKC_ACCESS_MODE_KSM) { 1270 if (IS_ENABLED(CONFIG_INFINIBAND_ON_DEMAND_PAGING)) 1271 obj->flags |= DEVX_OBJ_FLAGS_INDIRECT_MKEY; 1272 return 0; 1273 } 1274 1275 MLX5_SET(create_mkey_in, in, mkey_umem_valid, 1); 1276 return 0; 1277 } 1278 1279 static void devx_free_indirect_mkey(struct rcu_head *rcu) 1280 { 1281 kfree(container_of(rcu, struct devx_obj, devx_mr.rcu)); 1282 } 1283 1284 /* This function to delete from the radix tree needs to be called before 1285 * destroying the underlying mkey. Otherwise a race might occur in case that 1286 * other thread will get the same mkey before this one will be deleted, 1287 * in that case it will fail via inserting to the tree its own data. 1288 * 1289 * Note: 1290 * An error in the destroy is not expected unless there is some other indirect 1291 * mkey which points to this one. In a kernel cleanup flow it will be just 1292 * destroyed in the iterative destruction call. In a user flow, in case 1293 * the application didn't close in the expected order it's its own problem, 1294 * the mkey won't be part of the tree, in both cases the kernel is safe. 1295 */ 1296 static void devx_cleanup_mkey(struct devx_obj *obj) 1297 { 1298 xa_erase(&obj->ib_dev->mdev->priv.mkey_table, 1299 mlx5_base_mkey(obj->devx_mr.mmkey.key)); 1300 } 1301 1302 static void devx_cleanup_subscription(struct mlx5_ib_dev *dev, 1303 struct devx_event_subscription *sub) 1304 { 1305 struct devx_event *event; 1306 struct devx_obj_event *xa_val_level2; 1307 1308 if (sub->is_cleaned) 1309 return; 1310 1311 sub->is_cleaned = 1; 1312 list_del_rcu(&sub->xa_list); 1313 1314 if (list_empty(&sub->obj_list)) 1315 return; 1316 1317 list_del_rcu(&sub->obj_list); 1318 /* check whether key level 1 for this obj_sub_list is empty */ 1319 event = xa_load(&dev->devx_event_table.event_xa, 1320 sub->xa_key_level1); 1321 WARN_ON(!event); 1322 1323 xa_val_level2 = xa_load(&event->object_ids, sub->xa_key_level2); 1324 if (list_empty(&xa_val_level2->obj_sub_list)) { 1325 xa_erase(&event->object_ids, 1326 sub->xa_key_level2); 1327 kfree_rcu(xa_val_level2, rcu); 1328 } 1329 } 1330 1331 static int devx_obj_cleanup(struct ib_uobject *uobject, 1332 enum rdma_remove_reason why, 1333 struct uverbs_attr_bundle *attrs) 1334 { 1335 u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)]; 1336 struct mlx5_devx_event_table *devx_event_table; 1337 struct devx_obj *obj = uobject->object; 1338 struct devx_event_subscription *sub_entry, *tmp; 1339 struct mlx5_ib_dev *dev; 1340 int ret; 1341 1342 dev = mlx5_udata_to_mdev(&attrs->driver_udata); 1343 if (obj->flags & DEVX_OBJ_FLAGS_INDIRECT_MKEY) 1344 devx_cleanup_mkey(obj); 1345 1346 if (obj->flags & DEVX_OBJ_FLAGS_DCT) 1347 ret = mlx5_core_destroy_dct(obj->ib_dev->mdev, &obj->core_dct); 1348 else if (obj->flags & DEVX_OBJ_FLAGS_CQ) 1349 ret = mlx5_core_destroy_cq(obj->ib_dev->mdev, &obj->core_cq); 1350 else 1351 ret = mlx5_cmd_exec(obj->ib_dev->mdev, obj->dinbox, 1352 obj->dinlen, out, sizeof(out)); 1353 if (ib_is_destroy_retryable(ret, why, uobject)) 1354 return ret; 1355 1356 devx_event_table = &dev->devx_event_table; 1357 1358 mutex_lock(&devx_event_table->event_xa_lock); 1359 list_for_each_entry_safe(sub_entry, tmp, &obj->event_sub, obj_list) 1360 devx_cleanup_subscription(dev, sub_entry); 1361 mutex_unlock(&devx_event_table->event_xa_lock); 1362 1363 if (obj->flags & DEVX_OBJ_FLAGS_INDIRECT_MKEY) { 1364 call_srcu(&dev->mr_srcu, &obj->devx_mr.rcu, 1365 devx_free_indirect_mkey); 1366 return ret; 1367 } 1368 1369 kfree(obj); 1370 return ret; 1371 } 1372 1373 static void devx_cq_comp(struct mlx5_core_cq *mcq, struct mlx5_eqe *eqe) 1374 { 1375 struct devx_obj *obj = container_of(mcq, struct devx_obj, core_cq); 1376 struct mlx5_devx_event_table *table; 1377 struct devx_event *event; 1378 struct devx_obj_event *obj_event; 1379 u32 obj_id = mcq->cqn; 1380 1381 table = &obj->ib_dev->devx_event_table; 1382 rcu_read_lock(); 1383 event = xa_load(&table->event_xa, MLX5_EVENT_TYPE_COMP); 1384 if (!event) 1385 goto out; 1386 1387 obj_event = xa_load(&event->object_ids, obj_id); 1388 if (!obj_event) 1389 goto out; 1390 1391 dispatch_event_fd(&obj_event->obj_sub_list, eqe); 1392 out: 1393 rcu_read_unlock(); 1394 } 1395 1396 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_CREATE)( 1397 struct uverbs_attr_bundle *attrs) 1398 { 1399 void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN); 1400 int cmd_out_len = uverbs_attr_get_len(attrs, 1401 MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT); 1402 int cmd_in_len = uverbs_attr_get_len(attrs, 1403 MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN); 1404 void *cmd_out; 1405 struct ib_uobject *uobj = uverbs_attr_get_uobject( 1406 attrs, MLX5_IB_ATTR_DEVX_OBJ_CREATE_HANDLE); 1407 struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context( 1408 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext); 1409 struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device); 1410 u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)]; 1411 struct devx_obj *obj; 1412 u16 obj_type = 0; 1413 int err; 1414 int uid; 1415 u32 obj_id; 1416 u16 opcode; 1417 1418 if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id)) 1419 return -EINVAL; 1420 1421 uid = devx_get_uid(c, cmd_in); 1422 if (uid < 0) 1423 return uid; 1424 1425 if (!devx_is_obj_create_cmd(cmd_in, &opcode)) 1426 return -EINVAL; 1427 1428 cmd_out = uverbs_zalloc(attrs, cmd_out_len); 1429 if (IS_ERR(cmd_out)) 1430 return PTR_ERR(cmd_out); 1431 1432 obj = kzalloc(sizeof(struct devx_obj), GFP_KERNEL); 1433 if (!obj) 1434 return -ENOMEM; 1435 1436 MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid); 1437 if (opcode == MLX5_CMD_OP_CREATE_MKEY) { 1438 err = devx_handle_mkey_create(dev, obj, cmd_in, cmd_in_len); 1439 if (err) 1440 goto obj_free; 1441 } else { 1442 devx_set_umem_valid(cmd_in); 1443 } 1444 1445 if (opcode == MLX5_CMD_OP_CREATE_DCT) { 1446 obj->flags |= DEVX_OBJ_FLAGS_DCT; 1447 err = mlx5_core_create_dct(dev->mdev, &obj->core_dct, 1448 cmd_in, cmd_in_len, 1449 cmd_out, cmd_out_len); 1450 } else if (opcode == MLX5_CMD_OP_CREATE_CQ) { 1451 obj->flags |= DEVX_OBJ_FLAGS_CQ; 1452 obj->core_cq.comp = devx_cq_comp; 1453 err = mlx5_core_create_cq(dev->mdev, &obj->core_cq, 1454 cmd_in, cmd_in_len, cmd_out, 1455 cmd_out_len); 1456 } else { 1457 err = mlx5_cmd_exec(dev->mdev, cmd_in, 1458 cmd_in_len, 1459 cmd_out, cmd_out_len); 1460 } 1461 1462 if (err) 1463 goto obj_free; 1464 1465 uobj->object = obj; 1466 INIT_LIST_HEAD(&obj->event_sub); 1467 obj->ib_dev = dev; 1468 devx_obj_build_destroy_cmd(cmd_in, cmd_out, obj->dinbox, &obj->dinlen, 1469 &obj_id); 1470 WARN_ON(obj->dinlen > MLX5_MAX_DESTROY_INBOX_SIZE_DW * sizeof(u32)); 1471 1472 if (obj->flags & DEVX_OBJ_FLAGS_INDIRECT_MKEY) { 1473 err = devx_handle_mkey_indirect(obj, dev, cmd_in, cmd_out); 1474 if (err) 1475 goto obj_destroy; 1476 } 1477 1478 err = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT, cmd_out, cmd_out_len); 1479 if (err) 1480 goto err_copy; 1481 1482 if (opcode == MLX5_CMD_OP_CREATE_GENERAL_OBJECT) 1483 obj_type = MLX5_GET(general_obj_in_cmd_hdr, cmd_in, obj_type); 1484 1485 obj->obj_id = get_enc_obj_id(opcode | obj_type << 16, obj_id); 1486 1487 return 0; 1488 1489 err_copy: 1490 if (obj->flags & DEVX_OBJ_FLAGS_INDIRECT_MKEY) 1491 devx_cleanup_mkey(obj); 1492 obj_destroy: 1493 if (obj->flags & DEVX_OBJ_FLAGS_DCT) 1494 mlx5_core_destroy_dct(obj->ib_dev->mdev, &obj->core_dct); 1495 else if (obj->flags & DEVX_OBJ_FLAGS_CQ) 1496 mlx5_core_destroy_cq(obj->ib_dev->mdev, &obj->core_cq); 1497 else 1498 mlx5_cmd_exec(obj->ib_dev->mdev, obj->dinbox, obj->dinlen, out, 1499 sizeof(out)); 1500 obj_free: 1501 kfree(obj); 1502 return err; 1503 } 1504 1505 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_MODIFY)( 1506 struct uverbs_attr_bundle *attrs) 1507 { 1508 void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN); 1509 int cmd_out_len = uverbs_attr_get_len(attrs, 1510 MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT); 1511 struct ib_uobject *uobj = uverbs_attr_get_uobject(attrs, 1512 MLX5_IB_ATTR_DEVX_OBJ_MODIFY_HANDLE); 1513 struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context( 1514 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext); 1515 struct mlx5_ib_dev *mdev = to_mdev(c->ibucontext.device); 1516 void *cmd_out; 1517 int err; 1518 int uid; 1519 1520 if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id)) 1521 return -EINVAL; 1522 1523 uid = devx_get_uid(c, cmd_in); 1524 if (uid < 0) 1525 return uid; 1526 1527 if (!devx_is_obj_modify_cmd(cmd_in)) 1528 return -EINVAL; 1529 1530 if (!devx_is_valid_obj_id(attrs, uobj, cmd_in)) 1531 return -EINVAL; 1532 1533 cmd_out = uverbs_zalloc(attrs, cmd_out_len); 1534 if (IS_ERR(cmd_out)) 1535 return PTR_ERR(cmd_out); 1536 1537 MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid); 1538 devx_set_umem_valid(cmd_in); 1539 1540 err = mlx5_cmd_exec(mdev->mdev, cmd_in, 1541 uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN), 1542 cmd_out, cmd_out_len); 1543 if (err) 1544 return err; 1545 1546 return uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT, 1547 cmd_out, cmd_out_len); 1548 } 1549 1550 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_QUERY)( 1551 struct uverbs_attr_bundle *attrs) 1552 { 1553 void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN); 1554 int cmd_out_len = uverbs_attr_get_len(attrs, 1555 MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT); 1556 struct ib_uobject *uobj = uverbs_attr_get_uobject(attrs, 1557 MLX5_IB_ATTR_DEVX_OBJ_QUERY_HANDLE); 1558 struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context( 1559 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext); 1560 void *cmd_out; 1561 int err; 1562 int uid; 1563 struct mlx5_ib_dev *mdev = to_mdev(c->ibucontext.device); 1564 1565 if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id)) 1566 return -EINVAL; 1567 1568 uid = devx_get_uid(c, cmd_in); 1569 if (uid < 0) 1570 return uid; 1571 1572 if (!devx_is_obj_query_cmd(cmd_in)) 1573 return -EINVAL; 1574 1575 if (!devx_is_valid_obj_id(attrs, uobj, cmd_in)) 1576 return -EINVAL; 1577 1578 cmd_out = uverbs_zalloc(attrs, cmd_out_len); 1579 if (IS_ERR(cmd_out)) 1580 return PTR_ERR(cmd_out); 1581 1582 MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid); 1583 err = mlx5_cmd_exec(mdev->mdev, cmd_in, 1584 uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN), 1585 cmd_out, cmd_out_len); 1586 if (err) 1587 return err; 1588 1589 return uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT, 1590 cmd_out, cmd_out_len); 1591 } 1592 1593 struct devx_async_event_queue { 1594 spinlock_t lock; 1595 wait_queue_head_t poll_wait; 1596 struct list_head event_list; 1597 atomic_t bytes_in_use; 1598 u8 is_destroyed:1; 1599 }; 1600 1601 struct devx_async_cmd_event_file { 1602 struct ib_uobject uobj; 1603 struct devx_async_event_queue ev_queue; 1604 struct mlx5_async_ctx async_ctx; 1605 }; 1606 1607 static void devx_init_event_queue(struct devx_async_event_queue *ev_queue) 1608 { 1609 spin_lock_init(&ev_queue->lock); 1610 INIT_LIST_HEAD(&ev_queue->event_list); 1611 init_waitqueue_head(&ev_queue->poll_wait); 1612 atomic_set(&ev_queue->bytes_in_use, 0); 1613 ev_queue->is_destroyed = 0; 1614 } 1615 1616 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC)( 1617 struct uverbs_attr_bundle *attrs) 1618 { 1619 struct devx_async_cmd_event_file *ev_file; 1620 1621 struct ib_uobject *uobj = uverbs_attr_get_uobject( 1622 attrs, MLX5_IB_ATTR_DEVX_ASYNC_CMD_FD_ALLOC_HANDLE); 1623 struct mlx5_ib_dev *mdev = mlx5_udata_to_mdev(&attrs->driver_udata); 1624 1625 ev_file = container_of(uobj, struct devx_async_cmd_event_file, 1626 uobj); 1627 devx_init_event_queue(&ev_file->ev_queue); 1628 mlx5_cmd_init_async_ctx(mdev->mdev, &ev_file->async_ctx); 1629 return 0; 1630 } 1631 1632 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC)( 1633 struct uverbs_attr_bundle *attrs) 1634 { 1635 struct ib_uobject *uobj = uverbs_attr_get_uobject( 1636 attrs, MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_HANDLE); 1637 struct devx_async_event_file *ev_file; 1638 struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context( 1639 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext); 1640 struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device); 1641 u32 flags; 1642 int err; 1643 1644 err = uverbs_get_flags32(&flags, attrs, 1645 MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_FLAGS, 1646 MLX5_IB_UAPI_DEVX_CR_EV_CH_FLAGS_OMIT_DATA); 1647 1648 if (err) 1649 return err; 1650 1651 ev_file = container_of(uobj, struct devx_async_event_file, 1652 uobj); 1653 spin_lock_init(&ev_file->lock); 1654 INIT_LIST_HEAD(&ev_file->event_list); 1655 init_waitqueue_head(&ev_file->poll_wait); 1656 if (flags & MLX5_IB_UAPI_DEVX_CR_EV_CH_FLAGS_OMIT_DATA) 1657 ev_file->omit_data = 1; 1658 INIT_LIST_HEAD(&ev_file->subscribed_events_list); 1659 ev_file->dev = dev; 1660 get_device(&dev->ib_dev.dev); 1661 return 0; 1662 } 1663 1664 static void devx_query_callback(int status, struct mlx5_async_work *context) 1665 { 1666 struct devx_async_data *async_data = 1667 container_of(context, struct devx_async_data, cb_work); 1668 struct ib_uobject *fd_uobj = async_data->fd_uobj; 1669 struct devx_async_cmd_event_file *ev_file; 1670 struct devx_async_event_queue *ev_queue; 1671 unsigned long flags; 1672 1673 ev_file = container_of(fd_uobj, struct devx_async_cmd_event_file, 1674 uobj); 1675 ev_queue = &ev_file->ev_queue; 1676 1677 spin_lock_irqsave(&ev_queue->lock, flags); 1678 list_add_tail(&async_data->list, &ev_queue->event_list); 1679 spin_unlock_irqrestore(&ev_queue->lock, flags); 1680 1681 wake_up_interruptible(&ev_queue->poll_wait); 1682 fput(fd_uobj->object); 1683 } 1684 1685 #define MAX_ASYNC_BYTES_IN_USE (1024 * 1024) /* 1MB */ 1686 1687 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_ASYNC_QUERY)( 1688 struct uverbs_attr_bundle *attrs) 1689 { 1690 void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, 1691 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_CMD_IN); 1692 struct ib_uobject *uobj = uverbs_attr_get_uobject( 1693 attrs, 1694 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_HANDLE); 1695 u16 cmd_out_len; 1696 struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context( 1697 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext); 1698 struct ib_uobject *fd_uobj; 1699 int err; 1700 int uid; 1701 struct mlx5_ib_dev *mdev = to_mdev(c->ibucontext.device); 1702 struct devx_async_cmd_event_file *ev_file; 1703 struct devx_async_data *async_data; 1704 1705 if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id)) 1706 return -EINVAL; 1707 1708 uid = devx_get_uid(c, cmd_in); 1709 if (uid < 0) 1710 return uid; 1711 1712 if (!devx_is_obj_query_cmd(cmd_in)) 1713 return -EINVAL; 1714 1715 err = uverbs_get_const(&cmd_out_len, attrs, 1716 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_OUT_LEN); 1717 if (err) 1718 return err; 1719 1720 if (!devx_is_valid_obj_id(attrs, uobj, cmd_in)) 1721 return -EINVAL; 1722 1723 fd_uobj = uverbs_attr_get_uobject(attrs, 1724 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_FD); 1725 if (IS_ERR(fd_uobj)) 1726 return PTR_ERR(fd_uobj); 1727 1728 ev_file = container_of(fd_uobj, struct devx_async_cmd_event_file, 1729 uobj); 1730 1731 if (atomic_add_return(cmd_out_len, &ev_file->ev_queue.bytes_in_use) > 1732 MAX_ASYNC_BYTES_IN_USE) { 1733 atomic_sub(cmd_out_len, &ev_file->ev_queue.bytes_in_use); 1734 return -EAGAIN; 1735 } 1736 1737 async_data = kvzalloc(struct_size(async_data, hdr.out_data, 1738 cmd_out_len), GFP_KERNEL); 1739 if (!async_data) { 1740 err = -ENOMEM; 1741 goto sub_bytes; 1742 } 1743 1744 err = uverbs_copy_from(&async_data->hdr.wr_id, attrs, 1745 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_WR_ID); 1746 if (err) 1747 goto free_async; 1748 1749 async_data->cmd_out_len = cmd_out_len; 1750 async_data->mdev = mdev; 1751 async_data->fd_uobj = fd_uobj; 1752 1753 get_file(fd_uobj->object); 1754 MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid); 1755 err = mlx5_cmd_exec_cb(&ev_file->async_ctx, cmd_in, 1756 uverbs_attr_get_len(attrs, 1757 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_CMD_IN), 1758 async_data->hdr.out_data, 1759 async_data->cmd_out_len, 1760 devx_query_callback, &async_data->cb_work); 1761 1762 if (err) 1763 goto cb_err; 1764 1765 return 0; 1766 1767 cb_err: 1768 fput(fd_uobj->object); 1769 free_async: 1770 kvfree(async_data); 1771 sub_bytes: 1772 atomic_sub(cmd_out_len, &ev_file->ev_queue.bytes_in_use); 1773 return err; 1774 } 1775 1776 static void 1777 subscribe_event_xa_dealloc(struct mlx5_devx_event_table *devx_event_table, 1778 u32 key_level1, 1779 bool is_level2, 1780 u32 key_level2) 1781 { 1782 struct devx_event *event; 1783 struct devx_obj_event *xa_val_level2; 1784 1785 /* Level 1 is valid for future use, no need to free */ 1786 if (!is_level2) 1787 return; 1788 1789 event = xa_load(&devx_event_table->event_xa, key_level1); 1790 WARN_ON(!event); 1791 1792 xa_val_level2 = xa_load(&event->object_ids, 1793 key_level2); 1794 if (list_empty(&xa_val_level2->obj_sub_list)) { 1795 xa_erase(&event->object_ids, 1796 key_level2); 1797 kfree_rcu(xa_val_level2, rcu); 1798 } 1799 } 1800 1801 static int 1802 subscribe_event_xa_alloc(struct mlx5_devx_event_table *devx_event_table, 1803 u32 key_level1, 1804 bool is_level2, 1805 u32 key_level2) 1806 { 1807 struct devx_obj_event *obj_event; 1808 struct devx_event *event; 1809 int err; 1810 1811 event = xa_load(&devx_event_table->event_xa, key_level1); 1812 if (!event) { 1813 event = kzalloc(sizeof(*event), GFP_KERNEL); 1814 if (!event) 1815 return -ENOMEM; 1816 1817 INIT_LIST_HEAD(&event->unaffiliated_list); 1818 xa_init(&event->object_ids); 1819 1820 err = xa_insert(&devx_event_table->event_xa, 1821 key_level1, 1822 event, 1823 GFP_KERNEL); 1824 if (err) { 1825 kfree(event); 1826 return err; 1827 } 1828 } 1829 1830 if (!is_level2) 1831 return 0; 1832 1833 obj_event = xa_load(&event->object_ids, key_level2); 1834 if (!obj_event) { 1835 obj_event = kzalloc(sizeof(*obj_event), GFP_KERNEL); 1836 if (!obj_event) 1837 /* Level1 is valid for future use, no need to free */ 1838 return -ENOMEM; 1839 1840 err = xa_insert(&event->object_ids, 1841 key_level2, 1842 obj_event, 1843 GFP_KERNEL); 1844 if (err) 1845 return err; 1846 INIT_LIST_HEAD(&obj_event->obj_sub_list); 1847 } 1848 1849 return 0; 1850 } 1851 1852 static bool is_valid_events_legacy(int num_events, u16 *event_type_num_list, 1853 struct devx_obj *obj) 1854 { 1855 int i; 1856 1857 for (i = 0; i < num_events; i++) { 1858 if (obj) { 1859 if (!is_legacy_obj_event_num(event_type_num_list[i])) 1860 return false; 1861 } else if (!is_legacy_unaffiliated_event_num( 1862 event_type_num_list[i])) { 1863 return false; 1864 } 1865 } 1866 1867 return true; 1868 } 1869 1870 #define MAX_SUPP_EVENT_NUM 255 1871 static bool is_valid_events(struct mlx5_core_dev *dev, 1872 int num_events, u16 *event_type_num_list, 1873 struct devx_obj *obj) 1874 { 1875 __be64 *aff_events; 1876 __be64 *unaff_events; 1877 int mask_entry; 1878 int mask_bit; 1879 int i; 1880 1881 if (MLX5_CAP_GEN(dev, event_cap)) { 1882 aff_events = MLX5_CAP_DEV_EVENT(dev, 1883 user_affiliated_events); 1884 unaff_events = MLX5_CAP_DEV_EVENT(dev, 1885 user_unaffiliated_events); 1886 } else { 1887 return is_valid_events_legacy(num_events, event_type_num_list, 1888 obj); 1889 } 1890 1891 for (i = 0; i < num_events; i++) { 1892 if (event_type_num_list[i] > MAX_SUPP_EVENT_NUM) 1893 return false; 1894 1895 mask_entry = event_type_num_list[i] / 64; 1896 mask_bit = event_type_num_list[i] % 64; 1897 1898 if (obj) { 1899 /* CQ completion */ 1900 if (event_type_num_list[i] == 0) 1901 continue; 1902 1903 if (!(be64_to_cpu(aff_events[mask_entry]) & 1904 (1ull << mask_bit))) 1905 return false; 1906 1907 continue; 1908 } 1909 1910 if (!(be64_to_cpu(unaff_events[mask_entry]) & 1911 (1ull << mask_bit))) 1912 return false; 1913 } 1914 1915 return true; 1916 } 1917 1918 #define MAX_NUM_EVENTS 16 1919 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT)( 1920 struct uverbs_attr_bundle *attrs) 1921 { 1922 struct ib_uobject *devx_uobj = uverbs_attr_get_uobject( 1923 attrs, 1924 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_OBJ_HANDLE); 1925 struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context( 1926 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext); 1927 struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device); 1928 struct ib_uobject *fd_uobj; 1929 struct devx_obj *obj = NULL; 1930 struct devx_async_event_file *ev_file; 1931 struct mlx5_devx_event_table *devx_event_table = &dev->devx_event_table; 1932 u16 *event_type_num_list; 1933 struct devx_event_subscription *event_sub, *tmp_sub; 1934 struct list_head sub_list; 1935 int redirect_fd; 1936 bool use_eventfd = false; 1937 int num_events; 1938 int num_alloc_xa_entries = 0; 1939 u16 obj_type = 0; 1940 u64 cookie = 0; 1941 u32 obj_id = 0; 1942 int err; 1943 int i; 1944 1945 if (!c->devx_uid) 1946 return -EINVAL; 1947 1948 if (!IS_ERR(devx_uobj)) { 1949 obj = (struct devx_obj *)devx_uobj->object; 1950 if (obj) 1951 obj_id = get_dec_obj_id(obj->obj_id); 1952 } 1953 1954 fd_uobj = uverbs_attr_get_uobject(attrs, 1955 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_HANDLE); 1956 if (IS_ERR(fd_uobj)) 1957 return PTR_ERR(fd_uobj); 1958 1959 ev_file = container_of(fd_uobj, struct devx_async_event_file, 1960 uobj); 1961 1962 if (uverbs_attr_is_valid(attrs, 1963 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_NUM)) { 1964 err = uverbs_copy_from(&redirect_fd, attrs, 1965 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_NUM); 1966 if (err) 1967 return err; 1968 1969 use_eventfd = true; 1970 } 1971 1972 if (uverbs_attr_is_valid(attrs, 1973 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_COOKIE)) { 1974 if (use_eventfd) 1975 return -EINVAL; 1976 1977 err = uverbs_copy_from(&cookie, attrs, 1978 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_COOKIE); 1979 if (err) 1980 return err; 1981 } 1982 1983 num_events = uverbs_attr_ptr_get_array_size( 1984 attrs, MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_TYPE_NUM_LIST, 1985 sizeof(u16)); 1986 1987 if (num_events < 0) 1988 return num_events; 1989 1990 if (num_events > MAX_NUM_EVENTS) 1991 return -EINVAL; 1992 1993 event_type_num_list = uverbs_attr_get_alloced_ptr(attrs, 1994 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_TYPE_NUM_LIST); 1995 1996 if (!is_valid_events(dev->mdev, num_events, event_type_num_list, obj)) 1997 return -EINVAL; 1998 1999 INIT_LIST_HEAD(&sub_list); 2000 2001 /* Protect from concurrent subscriptions to same XA entries to allow 2002 * both to succeed 2003 */ 2004 mutex_lock(&devx_event_table->event_xa_lock); 2005 for (i = 0; i < num_events; i++) { 2006 u32 key_level1; 2007 2008 if (obj) 2009 obj_type = get_dec_obj_type(obj, 2010 event_type_num_list[i]); 2011 key_level1 = event_type_num_list[i] | obj_type << 16; 2012 2013 err = subscribe_event_xa_alloc(devx_event_table, 2014 key_level1, 2015 obj, 2016 obj_id); 2017 if (err) 2018 goto err; 2019 2020 num_alloc_xa_entries++; 2021 event_sub = kzalloc(sizeof(*event_sub), GFP_KERNEL); 2022 if (!event_sub) 2023 goto err; 2024 2025 list_add_tail(&event_sub->event_list, &sub_list); 2026 if (use_eventfd) { 2027 event_sub->eventfd = 2028 eventfd_ctx_fdget(redirect_fd); 2029 2030 if (IS_ERR(event_sub->eventfd)) { 2031 err = PTR_ERR(event_sub->eventfd); 2032 event_sub->eventfd = NULL; 2033 goto err; 2034 } 2035 } 2036 2037 event_sub->cookie = cookie; 2038 event_sub->ev_file = ev_file; 2039 event_sub->filp = fd_uobj->object; 2040 /* May be needed upon cleanup the devx object/subscription */ 2041 event_sub->xa_key_level1 = key_level1; 2042 event_sub->xa_key_level2 = obj_id; 2043 INIT_LIST_HEAD(&event_sub->obj_list); 2044 } 2045 2046 /* Once all the allocations and the XA data insertions were done we 2047 * can go ahead and add all the subscriptions to the relevant lists 2048 * without concern of a failure. 2049 */ 2050 list_for_each_entry_safe(event_sub, tmp_sub, &sub_list, event_list) { 2051 struct devx_event *event; 2052 struct devx_obj_event *obj_event; 2053 2054 list_del_init(&event_sub->event_list); 2055 2056 spin_lock_irq(&ev_file->lock); 2057 list_add_tail_rcu(&event_sub->file_list, 2058 &ev_file->subscribed_events_list); 2059 spin_unlock_irq(&ev_file->lock); 2060 2061 event = xa_load(&devx_event_table->event_xa, 2062 event_sub->xa_key_level1); 2063 WARN_ON(!event); 2064 2065 if (!obj) { 2066 list_add_tail_rcu(&event_sub->xa_list, 2067 &event->unaffiliated_list); 2068 continue; 2069 } 2070 2071 obj_event = xa_load(&event->object_ids, obj_id); 2072 WARN_ON(!obj_event); 2073 list_add_tail_rcu(&event_sub->xa_list, 2074 &obj_event->obj_sub_list); 2075 list_add_tail_rcu(&event_sub->obj_list, 2076 &obj->event_sub); 2077 } 2078 2079 mutex_unlock(&devx_event_table->event_xa_lock); 2080 return 0; 2081 2082 err: 2083 list_for_each_entry_safe(event_sub, tmp_sub, &sub_list, event_list) { 2084 list_del(&event_sub->event_list); 2085 2086 subscribe_event_xa_dealloc(devx_event_table, 2087 event_sub->xa_key_level1, 2088 obj, 2089 obj_id); 2090 2091 if (event_sub->eventfd) 2092 eventfd_ctx_put(event_sub->eventfd); 2093 2094 kfree(event_sub); 2095 } 2096 2097 mutex_unlock(&devx_event_table->event_xa_lock); 2098 return err; 2099 } 2100 2101 static int devx_umem_get(struct mlx5_ib_dev *dev, struct ib_ucontext *ucontext, 2102 struct uverbs_attr_bundle *attrs, 2103 struct devx_umem *obj) 2104 { 2105 u64 addr; 2106 size_t size; 2107 u32 access; 2108 int npages; 2109 int err; 2110 u32 page_mask; 2111 2112 if (uverbs_copy_from(&addr, attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_ADDR) || 2113 uverbs_copy_from(&size, attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_LEN)) 2114 return -EFAULT; 2115 2116 err = uverbs_get_flags32(&access, attrs, 2117 MLX5_IB_ATTR_DEVX_UMEM_REG_ACCESS, 2118 IB_ACCESS_LOCAL_WRITE | 2119 IB_ACCESS_REMOTE_WRITE | 2120 IB_ACCESS_REMOTE_READ); 2121 if (err) 2122 return err; 2123 2124 err = ib_check_mr_access(access); 2125 if (err) 2126 return err; 2127 2128 obj->umem = ib_umem_get(&attrs->driver_udata, addr, size, access, 0); 2129 if (IS_ERR(obj->umem)) 2130 return PTR_ERR(obj->umem); 2131 2132 mlx5_ib_cont_pages(obj->umem, obj->umem->address, 2133 MLX5_MKEY_PAGE_SHIFT_MASK, &npages, 2134 &obj->page_shift, &obj->ncont, NULL); 2135 2136 if (!npages) { 2137 ib_umem_release(obj->umem); 2138 return -EINVAL; 2139 } 2140 2141 page_mask = (1 << obj->page_shift) - 1; 2142 obj->page_offset = obj->umem->address & page_mask; 2143 2144 return 0; 2145 } 2146 2147 static int devx_umem_reg_cmd_alloc(struct uverbs_attr_bundle *attrs, 2148 struct devx_umem *obj, 2149 struct devx_umem_reg_cmd *cmd) 2150 { 2151 cmd->inlen = MLX5_ST_SZ_BYTES(create_umem_in) + 2152 (MLX5_ST_SZ_BYTES(mtt) * obj->ncont); 2153 cmd->in = uverbs_zalloc(attrs, cmd->inlen); 2154 return PTR_ERR_OR_ZERO(cmd->in); 2155 } 2156 2157 static void devx_umem_reg_cmd_build(struct mlx5_ib_dev *dev, 2158 struct devx_umem *obj, 2159 struct devx_umem_reg_cmd *cmd) 2160 { 2161 void *umem; 2162 __be64 *mtt; 2163 2164 umem = MLX5_ADDR_OF(create_umem_in, cmd->in, umem); 2165 mtt = (__be64 *)MLX5_ADDR_OF(umem, umem, mtt); 2166 2167 MLX5_SET(create_umem_in, cmd->in, opcode, MLX5_CMD_OP_CREATE_UMEM); 2168 MLX5_SET64(umem, umem, num_of_mtt, obj->ncont); 2169 MLX5_SET(umem, umem, log_page_size, obj->page_shift - 2170 MLX5_ADAPTER_PAGE_SHIFT); 2171 MLX5_SET(umem, umem, page_offset, obj->page_offset); 2172 mlx5_ib_populate_pas(dev, obj->umem, obj->page_shift, mtt, 2173 (obj->umem->writable ? MLX5_IB_MTT_WRITE : 0) | 2174 MLX5_IB_MTT_READ); 2175 } 2176 2177 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_UMEM_REG)( 2178 struct uverbs_attr_bundle *attrs) 2179 { 2180 struct devx_umem_reg_cmd cmd; 2181 struct devx_umem *obj; 2182 struct ib_uobject *uobj = uverbs_attr_get_uobject( 2183 attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE); 2184 u32 obj_id; 2185 struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context( 2186 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext); 2187 struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device); 2188 int err; 2189 2190 if (!c->devx_uid) 2191 return -EINVAL; 2192 2193 obj = kzalloc(sizeof(struct devx_umem), GFP_KERNEL); 2194 if (!obj) 2195 return -ENOMEM; 2196 2197 err = devx_umem_get(dev, &c->ibucontext, attrs, obj); 2198 if (err) 2199 goto err_obj_free; 2200 2201 err = devx_umem_reg_cmd_alloc(attrs, obj, &cmd); 2202 if (err) 2203 goto err_umem_release; 2204 2205 devx_umem_reg_cmd_build(dev, obj, &cmd); 2206 2207 MLX5_SET(create_umem_in, cmd.in, uid, c->devx_uid); 2208 err = mlx5_cmd_exec(dev->mdev, cmd.in, cmd.inlen, cmd.out, 2209 sizeof(cmd.out)); 2210 if (err) 2211 goto err_umem_release; 2212 2213 obj->mdev = dev->mdev; 2214 uobj->object = obj; 2215 devx_obj_build_destroy_cmd(cmd.in, cmd.out, obj->dinbox, &obj->dinlen, &obj_id); 2216 err = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_OUT_ID, &obj_id, sizeof(obj_id)); 2217 if (err) 2218 goto err_umem_destroy; 2219 2220 return 0; 2221 2222 err_umem_destroy: 2223 mlx5_cmd_exec(obj->mdev, obj->dinbox, obj->dinlen, cmd.out, sizeof(cmd.out)); 2224 err_umem_release: 2225 ib_umem_release(obj->umem); 2226 err_obj_free: 2227 kfree(obj); 2228 return err; 2229 } 2230 2231 static int devx_umem_cleanup(struct ib_uobject *uobject, 2232 enum rdma_remove_reason why, 2233 struct uverbs_attr_bundle *attrs) 2234 { 2235 struct devx_umem *obj = uobject->object; 2236 u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)]; 2237 int err; 2238 2239 err = mlx5_cmd_exec(obj->mdev, obj->dinbox, obj->dinlen, out, sizeof(out)); 2240 if (ib_is_destroy_retryable(err, why, uobject)) 2241 return err; 2242 2243 ib_umem_release(obj->umem); 2244 kfree(obj); 2245 return 0; 2246 } 2247 2248 static bool is_unaffiliated_event(struct mlx5_core_dev *dev, 2249 unsigned long event_type) 2250 { 2251 __be64 *unaff_events; 2252 int mask_entry; 2253 int mask_bit; 2254 2255 if (!MLX5_CAP_GEN(dev, event_cap)) 2256 return is_legacy_unaffiliated_event_num(event_type); 2257 2258 unaff_events = MLX5_CAP_DEV_EVENT(dev, 2259 user_unaffiliated_events); 2260 WARN_ON(event_type > MAX_SUPP_EVENT_NUM); 2261 2262 mask_entry = event_type / 64; 2263 mask_bit = event_type % 64; 2264 2265 if (!(be64_to_cpu(unaff_events[mask_entry]) & (1ull << mask_bit))) 2266 return false; 2267 2268 return true; 2269 } 2270 2271 static u32 devx_get_obj_id_from_event(unsigned long event_type, void *data) 2272 { 2273 struct mlx5_eqe *eqe = data; 2274 u32 obj_id = 0; 2275 2276 switch (event_type) { 2277 case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR: 2278 case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT: 2279 case MLX5_EVENT_TYPE_PATH_MIG: 2280 case MLX5_EVENT_TYPE_COMM_EST: 2281 case MLX5_EVENT_TYPE_SQ_DRAINED: 2282 case MLX5_EVENT_TYPE_SRQ_LAST_WQE: 2283 case MLX5_EVENT_TYPE_WQ_CATAS_ERROR: 2284 case MLX5_EVENT_TYPE_PATH_MIG_FAILED: 2285 case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR: 2286 case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR: 2287 obj_id = be32_to_cpu(eqe->data.qp_srq.qp_srq_n) & 0xffffff; 2288 break; 2289 case MLX5_EVENT_TYPE_DCT_DRAINED: 2290 obj_id = be32_to_cpu(eqe->data.dct.dctn) & 0xffffff; 2291 break; 2292 case MLX5_EVENT_TYPE_CQ_ERROR: 2293 obj_id = be32_to_cpu(eqe->data.cq_err.cqn) & 0xffffff; 2294 break; 2295 default: 2296 obj_id = MLX5_GET(affiliated_event_header, &eqe->data, obj_id); 2297 break; 2298 } 2299 2300 return obj_id; 2301 } 2302 2303 static int deliver_event(struct devx_event_subscription *event_sub, 2304 const void *data) 2305 { 2306 struct devx_async_event_file *ev_file; 2307 struct devx_async_event_data *event_data; 2308 unsigned long flags; 2309 2310 ev_file = event_sub->ev_file; 2311 2312 if (ev_file->omit_data) { 2313 spin_lock_irqsave(&ev_file->lock, flags); 2314 if (!list_empty(&event_sub->event_list)) { 2315 spin_unlock_irqrestore(&ev_file->lock, flags); 2316 return 0; 2317 } 2318 2319 list_add_tail(&event_sub->event_list, &ev_file->event_list); 2320 spin_unlock_irqrestore(&ev_file->lock, flags); 2321 wake_up_interruptible(&ev_file->poll_wait); 2322 return 0; 2323 } 2324 2325 event_data = kzalloc(sizeof(*event_data) + sizeof(struct mlx5_eqe), 2326 GFP_ATOMIC); 2327 if (!event_data) { 2328 spin_lock_irqsave(&ev_file->lock, flags); 2329 ev_file->is_overflow_err = 1; 2330 spin_unlock_irqrestore(&ev_file->lock, flags); 2331 return -ENOMEM; 2332 } 2333 2334 event_data->hdr.cookie = event_sub->cookie; 2335 memcpy(event_data->hdr.out_data, data, sizeof(struct mlx5_eqe)); 2336 2337 spin_lock_irqsave(&ev_file->lock, flags); 2338 list_add_tail(&event_data->list, &ev_file->event_list); 2339 spin_unlock_irqrestore(&ev_file->lock, flags); 2340 wake_up_interruptible(&ev_file->poll_wait); 2341 2342 return 0; 2343 } 2344 2345 static void dispatch_event_fd(struct list_head *fd_list, 2346 const void *data) 2347 { 2348 struct devx_event_subscription *item; 2349 2350 list_for_each_entry_rcu(item, fd_list, xa_list) { 2351 if (!get_file_rcu(item->filp)) 2352 continue; 2353 2354 if (item->eventfd) { 2355 eventfd_signal(item->eventfd, 1); 2356 fput(item->filp); 2357 continue; 2358 } 2359 2360 deliver_event(item, data); 2361 fput(item->filp); 2362 } 2363 } 2364 2365 static int devx_event_notifier(struct notifier_block *nb, 2366 unsigned long event_type, void *data) 2367 { 2368 struct mlx5_devx_event_table *table; 2369 struct mlx5_ib_dev *dev; 2370 struct devx_event *event; 2371 struct devx_obj_event *obj_event; 2372 u16 obj_type = 0; 2373 bool is_unaffiliated; 2374 u32 obj_id; 2375 2376 /* Explicit filtering to kernel events which may occur frequently */ 2377 if (event_type == MLX5_EVENT_TYPE_CMD || 2378 event_type == MLX5_EVENT_TYPE_PAGE_REQUEST) 2379 return NOTIFY_OK; 2380 2381 table = container_of(nb, struct mlx5_devx_event_table, devx_nb.nb); 2382 dev = container_of(table, struct mlx5_ib_dev, devx_event_table); 2383 is_unaffiliated = is_unaffiliated_event(dev->mdev, event_type); 2384 2385 if (!is_unaffiliated) 2386 obj_type = get_event_obj_type(event_type, data); 2387 2388 rcu_read_lock(); 2389 event = xa_load(&table->event_xa, event_type | (obj_type << 16)); 2390 if (!event) { 2391 rcu_read_unlock(); 2392 return NOTIFY_DONE; 2393 } 2394 2395 if (is_unaffiliated) { 2396 dispatch_event_fd(&event->unaffiliated_list, data); 2397 rcu_read_unlock(); 2398 return NOTIFY_OK; 2399 } 2400 2401 obj_id = devx_get_obj_id_from_event(event_type, data); 2402 obj_event = xa_load(&event->object_ids, obj_id); 2403 if (!obj_event) { 2404 rcu_read_unlock(); 2405 return NOTIFY_DONE; 2406 } 2407 2408 dispatch_event_fd(&obj_event->obj_sub_list, data); 2409 2410 rcu_read_unlock(); 2411 return NOTIFY_OK; 2412 } 2413 2414 void mlx5_ib_devx_init_event_table(struct mlx5_ib_dev *dev) 2415 { 2416 struct mlx5_devx_event_table *table = &dev->devx_event_table; 2417 2418 xa_init(&table->event_xa); 2419 mutex_init(&table->event_xa_lock); 2420 MLX5_NB_INIT(&table->devx_nb, devx_event_notifier, NOTIFY_ANY); 2421 mlx5_eq_notifier_register(dev->mdev, &table->devx_nb); 2422 } 2423 2424 void mlx5_ib_devx_cleanup_event_table(struct mlx5_ib_dev *dev) 2425 { 2426 struct mlx5_devx_event_table *table = &dev->devx_event_table; 2427 struct devx_event_subscription *sub, *tmp; 2428 struct devx_event *event; 2429 void *entry; 2430 unsigned long id; 2431 2432 mlx5_eq_notifier_unregister(dev->mdev, &table->devx_nb); 2433 mutex_lock(&dev->devx_event_table.event_xa_lock); 2434 xa_for_each(&table->event_xa, id, entry) { 2435 event = entry; 2436 list_for_each_entry_safe(sub, tmp, &event->unaffiliated_list, 2437 xa_list) 2438 devx_cleanup_subscription(dev, sub); 2439 kfree(entry); 2440 } 2441 mutex_unlock(&dev->devx_event_table.event_xa_lock); 2442 xa_destroy(&table->event_xa); 2443 } 2444 2445 static ssize_t devx_async_cmd_event_read(struct file *filp, char __user *buf, 2446 size_t count, loff_t *pos) 2447 { 2448 struct devx_async_cmd_event_file *comp_ev_file = filp->private_data; 2449 struct devx_async_event_queue *ev_queue = &comp_ev_file->ev_queue; 2450 struct devx_async_data *event; 2451 int ret = 0; 2452 size_t eventsz; 2453 2454 spin_lock_irq(&ev_queue->lock); 2455 2456 while (list_empty(&ev_queue->event_list)) { 2457 spin_unlock_irq(&ev_queue->lock); 2458 2459 if (filp->f_flags & O_NONBLOCK) 2460 return -EAGAIN; 2461 2462 if (wait_event_interruptible( 2463 ev_queue->poll_wait, 2464 (!list_empty(&ev_queue->event_list) || 2465 ev_queue->is_destroyed))) { 2466 return -ERESTARTSYS; 2467 } 2468 2469 if (list_empty(&ev_queue->event_list) && 2470 ev_queue->is_destroyed) 2471 return -EIO; 2472 2473 spin_lock_irq(&ev_queue->lock); 2474 } 2475 2476 event = list_entry(ev_queue->event_list.next, 2477 struct devx_async_data, list); 2478 eventsz = event->cmd_out_len + 2479 sizeof(struct mlx5_ib_uapi_devx_async_cmd_hdr); 2480 2481 if (eventsz > count) { 2482 spin_unlock_irq(&ev_queue->lock); 2483 return -ENOSPC; 2484 } 2485 2486 list_del(ev_queue->event_list.next); 2487 spin_unlock_irq(&ev_queue->lock); 2488 2489 if (copy_to_user(buf, &event->hdr, eventsz)) 2490 ret = -EFAULT; 2491 else 2492 ret = eventsz; 2493 2494 atomic_sub(event->cmd_out_len, &ev_queue->bytes_in_use); 2495 kvfree(event); 2496 return ret; 2497 } 2498 2499 static int devx_async_cmd_event_close(struct inode *inode, struct file *filp) 2500 { 2501 struct ib_uobject *uobj = filp->private_data; 2502 struct devx_async_cmd_event_file *comp_ev_file = container_of( 2503 uobj, struct devx_async_cmd_event_file, uobj); 2504 struct devx_async_data *entry, *tmp; 2505 2506 spin_lock_irq(&comp_ev_file->ev_queue.lock); 2507 list_for_each_entry_safe(entry, tmp, 2508 &comp_ev_file->ev_queue.event_list, list) 2509 kvfree(entry); 2510 spin_unlock_irq(&comp_ev_file->ev_queue.lock); 2511 2512 uverbs_close_fd(filp); 2513 return 0; 2514 } 2515 2516 static __poll_t devx_async_cmd_event_poll(struct file *filp, 2517 struct poll_table_struct *wait) 2518 { 2519 struct devx_async_cmd_event_file *comp_ev_file = filp->private_data; 2520 struct devx_async_event_queue *ev_queue = &comp_ev_file->ev_queue; 2521 __poll_t pollflags = 0; 2522 2523 poll_wait(filp, &ev_queue->poll_wait, wait); 2524 2525 spin_lock_irq(&ev_queue->lock); 2526 if (ev_queue->is_destroyed) 2527 pollflags = EPOLLIN | EPOLLRDNORM | EPOLLRDHUP; 2528 else if (!list_empty(&ev_queue->event_list)) 2529 pollflags = EPOLLIN | EPOLLRDNORM; 2530 spin_unlock_irq(&ev_queue->lock); 2531 2532 return pollflags; 2533 } 2534 2535 static const struct file_operations devx_async_cmd_event_fops = { 2536 .owner = THIS_MODULE, 2537 .read = devx_async_cmd_event_read, 2538 .poll = devx_async_cmd_event_poll, 2539 .release = devx_async_cmd_event_close, 2540 .llseek = no_llseek, 2541 }; 2542 2543 static ssize_t devx_async_event_read(struct file *filp, char __user *buf, 2544 size_t count, loff_t *pos) 2545 { 2546 struct devx_async_event_file *ev_file = filp->private_data; 2547 struct devx_event_subscription *event_sub; 2548 struct devx_async_event_data *uninitialized_var(event); 2549 int ret = 0; 2550 size_t eventsz; 2551 bool omit_data; 2552 void *event_data; 2553 2554 omit_data = ev_file->omit_data; 2555 2556 spin_lock_irq(&ev_file->lock); 2557 2558 if (ev_file->is_overflow_err) { 2559 ev_file->is_overflow_err = 0; 2560 spin_unlock_irq(&ev_file->lock); 2561 return -EOVERFLOW; 2562 } 2563 2564 if (ev_file->is_destroyed) { 2565 spin_unlock_irq(&ev_file->lock); 2566 return -EIO; 2567 } 2568 2569 while (list_empty(&ev_file->event_list)) { 2570 spin_unlock_irq(&ev_file->lock); 2571 2572 if (filp->f_flags & O_NONBLOCK) 2573 return -EAGAIN; 2574 2575 if (wait_event_interruptible(ev_file->poll_wait, 2576 (!list_empty(&ev_file->event_list) || 2577 ev_file->is_destroyed))) { 2578 return -ERESTARTSYS; 2579 } 2580 2581 spin_lock_irq(&ev_file->lock); 2582 if (ev_file->is_destroyed) { 2583 spin_unlock_irq(&ev_file->lock); 2584 return -EIO; 2585 } 2586 } 2587 2588 if (omit_data) { 2589 event_sub = list_first_entry(&ev_file->event_list, 2590 struct devx_event_subscription, 2591 event_list); 2592 eventsz = sizeof(event_sub->cookie); 2593 event_data = &event_sub->cookie; 2594 } else { 2595 event = list_first_entry(&ev_file->event_list, 2596 struct devx_async_event_data, list); 2597 eventsz = sizeof(struct mlx5_eqe) + 2598 sizeof(struct mlx5_ib_uapi_devx_async_event_hdr); 2599 event_data = &event->hdr; 2600 } 2601 2602 if (eventsz > count) { 2603 spin_unlock_irq(&ev_file->lock); 2604 return -EINVAL; 2605 } 2606 2607 if (omit_data) 2608 list_del_init(&event_sub->event_list); 2609 else 2610 list_del(&event->list); 2611 2612 spin_unlock_irq(&ev_file->lock); 2613 2614 if (copy_to_user(buf, event_data, eventsz)) 2615 /* This points to an application issue, not a kernel concern */ 2616 ret = -EFAULT; 2617 else 2618 ret = eventsz; 2619 2620 if (!omit_data) 2621 kfree(event); 2622 return ret; 2623 } 2624 2625 static __poll_t devx_async_event_poll(struct file *filp, 2626 struct poll_table_struct *wait) 2627 { 2628 struct devx_async_event_file *ev_file = filp->private_data; 2629 __poll_t pollflags = 0; 2630 2631 poll_wait(filp, &ev_file->poll_wait, wait); 2632 2633 spin_lock_irq(&ev_file->lock); 2634 if (ev_file->is_destroyed) 2635 pollflags = EPOLLIN | EPOLLRDNORM | EPOLLRDHUP; 2636 else if (!list_empty(&ev_file->event_list)) 2637 pollflags = EPOLLIN | EPOLLRDNORM; 2638 spin_unlock_irq(&ev_file->lock); 2639 2640 return pollflags; 2641 } 2642 2643 static int devx_async_event_close(struct inode *inode, struct file *filp) 2644 { 2645 struct devx_async_event_file *ev_file = filp->private_data; 2646 struct devx_event_subscription *event_sub, *event_sub_tmp; 2647 struct devx_async_event_data *entry, *tmp; 2648 struct mlx5_ib_dev *dev = ev_file->dev; 2649 2650 mutex_lock(&dev->devx_event_table.event_xa_lock); 2651 /* delete the subscriptions which are related to this FD */ 2652 list_for_each_entry_safe(event_sub, event_sub_tmp, 2653 &ev_file->subscribed_events_list, file_list) { 2654 devx_cleanup_subscription(dev, event_sub); 2655 if (event_sub->eventfd) 2656 eventfd_ctx_put(event_sub->eventfd); 2657 2658 list_del_rcu(&event_sub->file_list); 2659 /* subscription may not be used by the read API any more */ 2660 kfree_rcu(event_sub, rcu); 2661 } 2662 2663 mutex_unlock(&dev->devx_event_table.event_xa_lock); 2664 2665 /* free the pending events allocation */ 2666 if (!ev_file->omit_data) { 2667 spin_lock_irq(&ev_file->lock); 2668 list_for_each_entry_safe(entry, tmp, 2669 &ev_file->event_list, list) 2670 kfree(entry); /* read can't come any more */ 2671 spin_unlock_irq(&ev_file->lock); 2672 } 2673 2674 uverbs_close_fd(filp); 2675 put_device(&dev->ib_dev.dev); 2676 return 0; 2677 } 2678 2679 static const struct file_operations devx_async_event_fops = { 2680 .owner = THIS_MODULE, 2681 .read = devx_async_event_read, 2682 .poll = devx_async_event_poll, 2683 .release = devx_async_event_close, 2684 .llseek = no_llseek, 2685 }; 2686 2687 static int devx_hot_unplug_async_cmd_event_file(struct ib_uobject *uobj, 2688 enum rdma_remove_reason why) 2689 { 2690 struct devx_async_cmd_event_file *comp_ev_file = 2691 container_of(uobj, struct devx_async_cmd_event_file, 2692 uobj); 2693 struct devx_async_event_queue *ev_queue = &comp_ev_file->ev_queue; 2694 2695 spin_lock_irq(&ev_queue->lock); 2696 ev_queue->is_destroyed = 1; 2697 spin_unlock_irq(&ev_queue->lock); 2698 2699 if (why == RDMA_REMOVE_DRIVER_REMOVE) 2700 wake_up_interruptible(&ev_queue->poll_wait); 2701 2702 mlx5_cmd_cleanup_async_ctx(&comp_ev_file->async_ctx); 2703 return 0; 2704 }; 2705 2706 static int devx_hot_unplug_async_event_file(struct ib_uobject *uobj, 2707 enum rdma_remove_reason why) 2708 { 2709 struct devx_async_event_file *ev_file = 2710 container_of(uobj, struct devx_async_event_file, 2711 uobj); 2712 2713 spin_lock_irq(&ev_file->lock); 2714 ev_file->is_destroyed = 1; 2715 spin_unlock_irq(&ev_file->lock); 2716 2717 wake_up_interruptible(&ev_file->poll_wait); 2718 return 0; 2719 }; 2720 2721 DECLARE_UVERBS_NAMED_METHOD( 2722 MLX5_IB_METHOD_DEVX_UMEM_REG, 2723 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE, 2724 MLX5_IB_OBJECT_DEVX_UMEM, 2725 UVERBS_ACCESS_NEW, 2726 UA_MANDATORY), 2727 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_ADDR, 2728 UVERBS_ATTR_TYPE(u64), 2729 UA_MANDATORY), 2730 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_LEN, 2731 UVERBS_ATTR_TYPE(u64), 2732 UA_MANDATORY), 2733 UVERBS_ATTR_FLAGS_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_ACCESS, 2734 enum ib_access_flags), 2735 UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_DEVX_UMEM_REG_OUT_ID, 2736 UVERBS_ATTR_TYPE(u32), 2737 UA_MANDATORY)); 2738 2739 DECLARE_UVERBS_NAMED_METHOD_DESTROY( 2740 MLX5_IB_METHOD_DEVX_UMEM_DEREG, 2741 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_UMEM_DEREG_HANDLE, 2742 MLX5_IB_OBJECT_DEVX_UMEM, 2743 UVERBS_ACCESS_DESTROY, 2744 UA_MANDATORY)); 2745 2746 DECLARE_UVERBS_NAMED_METHOD( 2747 MLX5_IB_METHOD_DEVX_QUERY_EQN, 2748 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_QUERY_EQN_USER_VEC, 2749 UVERBS_ATTR_TYPE(u32), 2750 UA_MANDATORY), 2751 UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_DEVX_QUERY_EQN_DEV_EQN, 2752 UVERBS_ATTR_TYPE(u32), 2753 UA_MANDATORY)); 2754 2755 DECLARE_UVERBS_NAMED_METHOD( 2756 MLX5_IB_METHOD_DEVX_QUERY_UAR, 2757 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_QUERY_UAR_USER_IDX, 2758 UVERBS_ATTR_TYPE(u32), 2759 UA_MANDATORY), 2760 UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_DEVX_QUERY_UAR_DEV_IDX, 2761 UVERBS_ATTR_TYPE(u32), 2762 UA_MANDATORY)); 2763 2764 DECLARE_UVERBS_NAMED_METHOD( 2765 MLX5_IB_METHOD_DEVX_OTHER, 2766 UVERBS_ATTR_PTR_IN( 2767 MLX5_IB_ATTR_DEVX_OTHER_CMD_IN, 2768 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)), 2769 UA_MANDATORY, 2770 UA_ALLOC_AND_COPY), 2771 UVERBS_ATTR_PTR_OUT( 2772 MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT, 2773 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)), 2774 UA_MANDATORY)); 2775 2776 DECLARE_UVERBS_NAMED_METHOD( 2777 MLX5_IB_METHOD_DEVX_OBJ_CREATE, 2778 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_CREATE_HANDLE, 2779 MLX5_IB_OBJECT_DEVX_OBJ, 2780 UVERBS_ACCESS_NEW, 2781 UA_MANDATORY), 2782 UVERBS_ATTR_PTR_IN( 2783 MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN, 2784 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)), 2785 UA_MANDATORY, 2786 UA_ALLOC_AND_COPY), 2787 UVERBS_ATTR_PTR_OUT( 2788 MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT, 2789 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)), 2790 UA_MANDATORY)); 2791 2792 DECLARE_UVERBS_NAMED_METHOD_DESTROY( 2793 MLX5_IB_METHOD_DEVX_OBJ_DESTROY, 2794 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_DESTROY_HANDLE, 2795 MLX5_IB_OBJECT_DEVX_OBJ, 2796 UVERBS_ACCESS_DESTROY, 2797 UA_MANDATORY)); 2798 2799 DECLARE_UVERBS_NAMED_METHOD( 2800 MLX5_IB_METHOD_DEVX_OBJ_MODIFY, 2801 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_MODIFY_HANDLE, 2802 UVERBS_IDR_ANY_OBJECT, 2803 UVERBS_ACCESS_WRITE, 2804 UA_MANDATORY), 2805 UVERBS_ATTR_PTR_IN( 2806 MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN, 2807 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)), 2808 UA_MANDATORY, 2809 UA_ALLOC_AND_COPY), 2810 UVERBS_ATTR_PTR_OUT( 2811 MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT, 2812 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)), 2813 UA_MANDATORY)); 2814 2815 DECLARE_UVERBS_NAMED_METHOD( 2816 MLX5_IB_METHOD_DEVX_OBJ_QUERY, 2817 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_QUERY_HANDLE, 2818 UVERBS_IDR_ANY_OBJECT, 2819 UVERBS_ACCESS_READ, 2820 UA_MANDATORY), 2821 UVERBS_ATTR_PTR_IN( 2822 MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN, 2823 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)), 2824 UA_MANDATORY, 2825 UA_ALLOC_AND_COPY), 2826 UVERBS_ATTR_PTR_OUT( 2827 MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT, 2828 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)), 2829 UA_MANDATORY)); 2830 2831 DECLARE_UVERBS_NAMED_METHOD( 2832 MLX5_IB_METHOD_DEVX_OBJ_ASYNC_QUERY, 2833 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_QUERY_HANDLE, 2834 UVERBS_IDR_ANY_OBJECT, 2835 UVERBS_ACCESS_READ, 2836 UA_MANDATORY), 2837 UVERBS_ATTR_PTR_IN( 2838 MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN, 2839 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)), 2840 UA_MANDATORY, 2841 UA_ALLOC_AND_COPY), 2842 UVERBS_ATTR_CONST_IN(MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_OUT_LEN, 2843 u16, UA_MANDATORY), 2844 UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_FD, 2845 MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD, 2846 UVERBS_ACCESS_READ, 2847 UA_MANDATORY), 2848 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_WR_ID, 2849 UVERBS_ATTR_TYPE(u64), 2850 UA_MANDATORY)); 2851 2852 DECLARE_UVERBS_NAMED_METHOD( 2853 MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT, 2854 UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_HANDLE, 2855 MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD, 2856 UVERBS_ACCESS_READ, 2857 UA_MANDATORY), 2858 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_OBJ_HANDLE, 2859 MLX5_IB_OBJECT_DEVX_OBJ, 2860 UVERBS_ACCESS_READ, 2861 UA_OPTIONAL), 2862 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_TYPE_NUM_LIST, 2863 UVERBS_ATTR_MIN_SIZE(sizeof(u16)), 2864 UA_MANDATORY, 2865 UA_ALLOC_AND_COPY), 2866 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_COOKIE, 2867 UVERBS_ATTR_TYPE(u64), 2868 UA_OPTIONAL), 2869 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_NUM, 2870 UVERBS_ATTR_TYPE(u32), 2871 UA_OPTIONAL)); 2872 2873 DECLARE_UVERBS_GLOBAL_METHODS(MLX5_IB_OBJECT_DEVX, 2874 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OTHER), 2875 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_QUERY_UAR), 2876 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_QUERY_EQN), 2877 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT)); 2878 2879 DECLARE_UVERBS_NAMED_OBJECT(MLX5_IB_OBJECT_DEVX_OBJ, 2880 UVERBS_TYPE_ALLOC_IDR(devx_obj_cleanup), 2881 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_CREATE), 2882 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_DESTROY), 2883 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_MODIFY), 2884 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_QUERY), 2885 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_ASYNC_QUERY)); 2886 2887 DECLARE_UVERBS_NAMED_OBJECT(MLX5_IB_OBJECT_DEVX_UMEM, 2888 UVERBS_TYPE_ALLOC_IDR(devx_umem_cleanup), 2889 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_UMEM_REG), 2890 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_UMEM_DEREG)); 2891 2892 2893 DECLARE_UVERBS_NAMED_METHOD( 2894 MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC, 2895 UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_ASYNC_CMD_FD_ALLOC_HANDLE, 2896 MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD, 2897 UVERBS_ACCESS_NEW, 2898 UA_MANDATORY)); 2899 2900 DECLARE_UVERBS_NAMED_OBJECT( 2901 MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD, 2902 UVERBS_TYPE_ALLOC_FD(sizeof(struct devx_async_cmd_event_file), 2903 devx_hot_unplug_async_cmd_event_file, 2904 &devx_async_cmd_event_fops, "[devx_async_cmd]", 2905 O_RDONLY), 2906 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC)); 2907 2908 DECLARE_UVERBS_NAMED_METHOD( 2909 MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC, 2910 UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_HANDLE, 2911 MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD, 2912 UVERBS_ACCESS_NEW, 2913 UA_MANDATORY), 2914 UVERBS_ATTR_FLAGS_IN(MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_FLAGS, 2915 enum mlx5_ib_uapi_devx_create_event_channel_flags, 2916 UA_MANDATORY)); 2917 2918 DECLARE_UVERBS_NAMED_OBJECT( 2919 MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD, 2920 UVERBS_TYPE_ALLOC_FD(sizeof(struct devx_async_event_file), 2921 devx_hot_unplug_async_event_file, 2922 &devx_async_event_fops, "[devx_async_event]", 2923 O_RDONLY), 2924 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC)); 2925 2926 static bool devx_is_supported(struct ib_device *device) 2927 { 2928 struct mlx5_ib_dev *dev = to_mdev(device); 2929 2930 return MLX5_CAP_GEN(dev->mdev, log_max_uctx); 2931 } 2932 2933 const struct uapi_definition mlx5_ib_devx_defs[] = { 2934 UAPI_DEF_CHAIN_OBJ_TREE_NAMED( 2935 MLX5_IB_OBJECT_DEVX, 2936 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)), 2937 UAPI_DEF_CHAIN_OBJ_TREE_NAMED( 2938 MLX5_IB_OBJECT_DEVX_OBJ, 2939 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)), 2940 UAPI_DEF_CHAIN_OBJ_TREE_NAMED( 2941 MLX5_IB_OBJECT_DEVX_UMEM, 2942 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)), 2943 UAPI_DEF_CHAIN_OBJ_TREE_NAMED( 2944 MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD, 2945 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)), 2946 UAPI_DEF_CHAIN_OBJ_TREE_NAMED( 2947 MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD, 2948 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)), 2949 {}, 2950 }; 2951