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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
24static void dispatch_event_fd(struct list_head *fd_list, const void *data);
25
26enum 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
32struct 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
42struct 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 */
48struct 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 */
54struct devx_obj_event {
55 struct rcu_head rcu;
56 struct list_head obj_sub_list;
57};
58
59struct 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
80struct 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
93struct devx_umem {
94 struct mlx5_core_dev *mdev;
95 struct ib_umem *umem;
96 u32 dinlen;
97 u32 dinbox[MLX5_ST_SZ_DW(destroy_umem_in)];
98};
99
100struct devx_umem_reg_cmd {
101 void *in;
102 u32 inlen;
103 u32 out[MLX5_ST_SZ_DW(create_umem_out)];
104};
105
106static struct mlx5_ib_ucontext *
107devx_ufile2uctx(const struct uverbs_attr_bundle *attrs)
108{
109 return to_mucontext(ib_uverbs_get_ucontext(attrs));
110}
111
112int mlx5_ib_devx_create(struct mlx5_ib_dev *dev, bool is_user)
113{
114 u32 in[MLX5_ST_SZ_DW(create_uctx_in)] = {};
115 u32 out[MLX5_ST_SZ_DW(create_uctx_out)] = {};
116 void *uctx;
117 int err;
118 u16 uid;
119 u32 cap = 0;
120
121 /* 0 means not supported */
122 if (!MLX5_CAP_GEN(dev->mdev, log_max_uctx))
123 return -EINVAL;
124
125 uctx = MLX5_ADDR_OF(create_uctx_in, in, uctx);
126 if (is_user && capable(CAP_NET_RAW) &&
127 (MLX5_CAP_GEN(dev->mdev, uctx_cap) & MLX5_UCTX_CAP_RAW_TX))
128 cap |= MLX5_UCTX_CAP_RAW_TX;
129 if (is_user && capable(CAP_SYS_RAWIO) &&
130 (MLX5_CAP_GEN(dev->mdev, uctx_cap) &
131 MLX5_UCTX_CAP_INTERNAL_DEV_RES))
132 cap |= MLX5_UCTX_CAP_INTERNAL_DEV_RES;
133
134 MLX5_SET(create_uctx_in, in, opcode, MLX5_CMD_OP_CREATE_UCTX);
135 MLX5_SET(uctx, uctx, cap, cap);
136
137 err = mlx5_cmd_exec(dev->mdev, in, sizeof(in), out, sizeof(out));
138 if (err)
139 return err;
140
141 uid = MLX5_GET(create_uctx_out, out, uid);
142 return uid;
143}
144
145void mlx5_ib_devx_destroy(struct mlx5_ib_dev *dev, u16 uid)
146{
147 u32 in[MLX5_ST_SZ_DW(destroy_uctx_in)] = {};
148 u32 out[MLX5_ST_SZ_DW(destroy_uctx_out)] = {};
149
150 MLX5_SET(destroy_uctx_in, in, opcode, MLX5_CMD_OP_DESTROY_UCTX);
151 MLX5_SET(destroy_uctx_in, in, uid, uid);
152
153 mlx5_cmd_exec(dev->mdev, in, sizeof(in), out, sizeof(out));
154}
155
156static 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
166static 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
190static 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
206static 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
251static 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
276static 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 */
286static u64 get_enc_obj_id(u32 opcode, u32 obj_id)
287{
288 return ((u64)opcode << 32) | obj_id;
289}
290
291static u32 devx_get_created_obj_id(const void *in, const void *out, u16 opcode)
292{
293 switch (opcode) {
294 case MLX5_CMD_OP_CREATE_GENERAL_OBJECT:
295 return MLX5_GET(general_obj_out_cmd_hdr, out, obj_id);
296 case MLX5_CMD_OP_CREATE_UMEM:
297 return MLX5_GET(create_umem_out, out, umem_id);
298 case MLX5_CMD_OP_CREATE_MKEY:
299 return MLX5_GET(create_mkey_out, out, mkey_index);
300 case MLX5_CMD_OP_CREATE_CQ:
301 return MLX5_GET(create_cq_out, out, cqn);
302 case MLX5_CMD_OP_ALLOC_PD:
303 return MLX5_GET(alloc_pd_out, out, pd);
304 case MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN:
305 return MLX5_GET(alloc_transport_domain_out, out,
306 transport_domain);
307 case MLX5_CMD_OP_CREATE_RMP:
308 return MLX5_GET(create_rmp_out, out, rmpn);
309 case MLX5_CMD_OP_CREATE_SQ:
310 return MLX5_GET(create_sq_out, out, sqn);
311 case MLX5_CMD_OP_CREATE_RQ:
312 return MLX5_GET(create_rq_out, out, rqn);
313 case MLX5_CMD_OP_CREATE_RQT:
314 return MLX5_GET(create_rqt_out, out, rqtn);
315 case MLX5_CMD_OP_CREATE_TIR:
316 return MLX5_GET(create_tir_out, out, tirn);
317 case MLX5_CMD_OP_CREATE_TIS:
318 return MLX5_GET(create_tis_out, out, tisn);
319 case MLX5_CMD_OP_ALLOC_Q_COUNTER:
320 return MLX5_GET(alloc_q_counter_out, out, counter_set_id);
321 case MLX5_CMD_OP_CREATE_FLOW_TABLE:
322 return MLX5_GET(create_flow_table_out, out, table_id);
323 case MLX5_CMD_OP_CREATE_FLOW_GROUP:
324 return MLX5_GET(create_flow_group_out, out, group_id);
325 case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
326 return MLX5_GET(set_fte_in, in, flow_index);
327 case MLX5_CMD_OP_ALLOC_FLOW_COUNTER:
328 return MLX5_GET(alloc_flow_counter_out, out, flow_counter_id);
329 case MLX5_CMD_OP_ALLOC_PACKET_REFORMAT_CONTEXT:
330 return MLX5_GET(alloc_packet_reformat_context_out, out,
331 packet_reformat_id);
332 case MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT:
333 return MLX5_GET(alloc_modify_header_context_out, out,
334 modify_header_id);
335 case MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT:
336 return MLX5_GET(create_scheduling_element_out, out,
337 scheduling_element_id);
338 case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
339 return MLX5_GET(add_vxlan_udp_dport_in, in, vxlan_udp_port);
340 case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
341 return MLX5_GET(set_l2_table_entry_in, in, table_index);
342 case MLX5_CMD_OP_CREATE_QP:
343 return MLX5_GET(create_qp_out, out, qpn);
344 case MLX5_CMD_OP_CREATE_SRQ:
345 return MLX5_GET(create_srq_out, out, srqn);
346 case MLX5_CMD_OP_CREATE_XRC_SRQ:
347 return MLX5_GET(create_xrc_srq_out, out, xrc_srqn);
348 case MLX5_CMD_OP_CREATE_DCT:
349 return MLX5_GET(create_dct_out, out, dctn);
350 case MLX5_CMD_OP_CREATE_XRQ:
351 return MLX5_GET(create_xrq_out, out, xrqn);
352 case MLX5_CMD_OP_ATTACH_TO_MCG:
353 return MLX5_GET(attach_to_mcg_in, in, qpn);
354 case MLX5_CMD_OP_ALLOC_XRCD:
355 return MLX5_GET(alloc_xrcd_out, out, xrcd);
356 case MLX5_CMD_OP_CREATE_PSV:
357 return MLX5_GET(create_psv_out, out, psv0_index);
358 default:
359 /* The entry must match to one of the devx_is_obj_create_cmd */
360 WARN_ON(true);
361 return 0;
362 }
363}
364
365static u64 devx_get_obj_id(const void *in)
366{
367 u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
368 u64 obj_id;
369
370 switch (opcode) {
371 case MLX5_CMD_OP_MODIFY_GENERAL_OBJECT:
372 case MLX5_CMD_OP_QUERY_GENERAL_OBJECT:
373 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_GENERAL_OBJECT |
374 MLX5_GET(general_obj_in_cmd_hdr, in,
375 obj_type) << 16,
376 MLX5_GET(general_obj_in_cmd_hdr, in,
377 obj_id));
378 break;
379 case MLX5_CMD_OP_QUERY_MKEY:
380 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_MKEY,
381 MLX5_GET(query_mkey_in, in,
382 mkey_index));
383 break;
384 case MLX5_CMD_OP_QUERY_CQ:
385 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_CQ,
386 MLX5_GET(query_cq_in, in, cqn));
387 break;
388 case MLX5_CMD_OP_MODIFY_CQ:
389 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_CQ,
390 MLX5_GET(modify_cq_in, in, cqn));
391 break;
392 case MLX5_CMD_OP_QUERY_SQ:
393 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SQ,
394 MLX5_GET(query_sq_in, in, sqn));
395 break;
396 case MLX5_CMD_OP_MODIFY_SQ:
397 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SQ,
398 MLX5_GET(modify_sq_in, in, sqn));
399 break;
400 case MLX5_CMD_OP_QUERY_RQ:
401 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ,
402 MLX5_GET(query_rq_in, in, rqn));
403 break;
404 case MLX5_CMD_OP_MODIFY_RQ:
405 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ,
406 MLX5_GET(modify_rq_in, in, rqn));
407 break;
408 case MLX5_CMD_OP_QUERY_RMP:
409 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RMP,
410 MLX5_GET(query_rmp_in, in, rmpn));
411 break;
412 case MLX5_CMD_OP_MODIFY_RMP:
413 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RMP,
414 MLX5_GET(modify_rmp_in, in, rmpn));
415 break;
416 case MLX5_CMD_OP_QUERY_RQT:
417 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQT,
418 MLX5_GET(query_rqt_in, in, rqtn));
419 break;
420 case MLX5_CMD_OP_MODIFY_RQT:
421 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQT,
422 MLX5_GET(modify_rqt_in, in, rqtn));
423 break;
424 case MLX5_CMD_OP_QUERY_TIR:
425 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_TIR,
426 MLX5_GET(query_tir_in, in, tirn));
427 break;
428 case MLX5_CMD_OP_MODIFY_TIR:
429 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_TIR,
430 MLX5_GET(modify_tir_in, in, tirn));
431 break;
432 case MLX5_CMD_OP_QUERY_TIS:
433 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_TIS,
434 MLX5_GET(query_tis_in, in, tisn));
435 break;
436 case MLX5_CMD_OP_MODIFY_TIS:
437 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_TIS,
438 MLX5_GET(modify_tis_in, in, tisn));
439 break;
440 case MLX5_CMD_OP_QUERY_FLOW_TABLE:
441 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_FLOW_TABLE,
442 MLX5_GET(query_flow_table_in, in,
443 table_id));
444 break;
445 case MLX5_CMD_OP_MODIFY_FLOW_TABLE:
446 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_FLOW_TABLE,
447 MLX5_GET(modify_flow_table_in, in,
448 table_id));
449 break;
450 case MLX5_CMD_OP_QUERY_FLOW_GROUP:
451 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_FLOW_GROUP,
452 MLX5_GET(query_flow_group_in, in,
453 group_id));
454 break;
455 case MLX5_CMD_OP_QUERY_FLOW_TABLE_ENTRY:
456 obj_id = get_enc_obj_id(MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY,
457 MLX5_GET(query_fte_in, in,
458 flow_index));
459 break;
460 case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
461 obj_id = get_enc_obj_id(MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY,
462 MLX5_GET(set_fte_in, in, flow_index));
463 break;
464 case MLX5_CMD_OP_QUERY_Q_COUNTER:
465 obj_id = get_enc_obj_id(MLX5_CMD_OP_ALLOC_Q_COUNTER,
466 MLX5_GET(query_q_counter_in, in,
467 counter_set_id));
468 break;
469 case MLX5_CMD_OP_QUERY_FLOW_COUNTER:
470 obj_id = get_enc_obj_id(MLX5_CMD_OP_ALLOC_FLOW_COUNTER,
471 MLX5_GET(query_flow_counter_in, in,
472 flow_counter_id));
473 break;
474 case MLX5_CMD_OP_QUERY_MODIFY_HEADER_CONTEXT:
475 obj_id = get_enc_obj_id(MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT,
476 MLX5_GET(query_modify_header_context_in,
477 in, modify_header_id));
478 break;
479 case MLX5_CMD_OP_QUERY_SCHEDULING_ELEMENT:
480 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT,
481 MLX5_GET(query_scheduling_element_in,
482 in, scheduling_element_id));
483 break;
484 case MLX5_CMD_OP_MODIFY_SCHEDULING_ELEMENT:
485 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT,
486 MLX5_GET(modify_scheduling_element_in,
487 in, scheduling_element_id));
488 break;
489 case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
490 obj_id = get_enc_obj_id(MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT,
491 MLX5_GET(add_vxlan_udp_dport_in, in,
492 vxlan_udp_port));
493 break;
494 case MLX5_CMD_OP_QUERY_L2_TABLE_ENTRY:
495 obj_id = get_enc_obj_id(MLX5_CMD_OP_SET_L2_TABLE_ENTRY,
496 MLX5_GET(query_l2_table_entry_in, in,
497 table_index));
498 break;
499 case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
500 obj_id = get_enc_obj_id(MLX5_CMD_OP_SET_L2_TABLE_ENTRY,
501 MLX5_GET(set_l2_table_entry_in, in,
502 table_index));
503 break;
504 case MLX5_CMD_OP_QUERY_QP:
505 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
506 MLX5_GET(query_qp_in, in, qpn));
507 break;
508 case MLX5_CMD_OP_RST2INIT_QP:
509 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
510 MLX5_GET(rst2init_qp_in, in, qpn));
511 break;
512 case MLX5_CMD_OP_INIT2INIT_QP:
513 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
514 MLX5_GET(init2init_qp_in, in, qpn));
515 break;
516 case MLX5_CMD_OP_INIT2RTR_QP:
517 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
518 MLX5_GET(init2rtr_qp_in, in, qpn));
519 break;
520 case MLX5_CMD_OP_RTR2RTS_QP:
521 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
522 MLX5_GET(rtr2rts_qp_in, in, qpn));
523 break;
524 case MLX5_CMD_OP_RTS2RTS_QP:
525 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
526 MLX5_GET(rts2rts_qp_in, in, qpn));
527 break;
528 case MLX5_CMD_OP_SQERR2RTS_QP:
529 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
530 MLX5_GET(sqerr2rts_qp_in, in, qpn));
531 break;
532 case MLX5_CMD_OP_2ERR_QP:
533 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
534 MLX5_GET(qp_2err_in, in, qpn));
535 break;
536 case MLX5_CMD_OP_2RST_QP:
537 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
538 MLX5_GET(qp_2rst_in, in, qpn));
539 break;
540 case MLX5_CMD_OP_QUERY_DCT:
541 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_DCT,
542 MLX5_GET(query_dct_in, in, dctn));
543 break;
544 case MLX5_CMD_OP_QUERY_XRQ:
545 case MLX5_CMD_OP_QUERY_XRQ_DC_PARAMS_ENTRY:
546 case MLX5_CMD_OP_QUERY_XRQ_ERROR_PARAMS:
547 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_XRQ,
548 MLX5_GET(query_xrq_in, in, xrqn));
549 break;
550 case MLX5_CMD_OP_QUERY_XRC_SRQ:
551 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_XRC_SRQ,
552 MLX5_GET(query_xrc_srq_in, in,
553 xrc_srqn));
554 break;
555 case MLX5_CMD_OP_ARM_XRC_SRQ:
556 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_XRC_SRQ,
557 MLX5_GET(arm_xrc_srq_in, in, xrc_srqn));
558 break;
559 case MLX5_CMD_OP_QUERY_SRQ:
560 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SRQ,
561 MLX5_GET(query_srq_in, in, srqn));
562 break;
563 case MLX5_CMD_OP_ARM_RQ:
564 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ,
565 MLX5_GET(arm_rq_in, in, srq_number));
566 break;
567 case MLX5_CMD_OP_ARM_DCT_FOR_KEY_VIOLATION:
568 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_DCT,
569 MLX5_GET(drain_dct_in, in, dctn));
570 break;
571 case MLX5_CMD_OP_ARM_XRQ:
572 case MLX5_CMD_OP_SET_XRQ_DC_PARAMS_ENTRY:
573 case MLX5_CMD_OP_RELEASE_XRQ_ERROR:
574 case MLX5_CMD_OP_MODIFY_XRQ:
575 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_XRQ,
576 MLX5_GET(arm_xrq_in, in, xrqn));
577 break;
578 case MLX5_CMD_OP_QUERY_PACKET_REFORMAT_CONTEXT:
579 obj_id = get_enc_obj_id
580 (MLX5_CMD_OP_ALLOC_PACKET_REFORMAT_CONTEXT,
581 MLX5_GET(query_packet_reformat_context_in,
582 in, packet_reformat_id));
583 break;
584 default:
585 obj_id = 0;
586 }
587
588 return obj_id;
589}
590
591static bool devx_is_valid_obj_id(struct uverbs_attr_bundle *attrs,
592 struct ib_uobject *uobj, const void *in)
593{
594 struct mlx5_ib_dev *dev = mlx5_udata_to_mdev(&attrs->driver_udata);
595 u64 obj_id = devx_get_obj_id(in);
596
597 if (!obj_id)
598 return false;
599
600 switch (uobj_get_object_id(uobj)) {
601 case UVERBS_OBJECT_CQ:
602 return get_enc_obj_id(MLX5_CMD_OP_CREATE_CQ,
603 to_mcq(uobj->object)->mcq.cqn) ==
604 obj_id;
605
606 case UVERBS_OBJECT_SRQ:
607 {
608 struct mlx5_core_srq *srq = &(to_msrq(uobj->object)->msrq);
609 u16 opcode;
610
611 switch (srq->common.res) {
612 case MLX5_RES_XSRQ:
613 opcode = MLX5_CMD_OP_CREATE_XRC_SRQ;
614 break;
615 case MLX5_RES_XRQ:
616 opcode = MLX5_CMD_OP_CREATE_XRQ;
617 break;
618 default:
619 if (!dev->mdev->issi)
620 opcode = MLX5_CMD_OP_CREATE_SRQ;
621 else
622 opcode = MLX5_CMD_OP_CREATE_RMP;
623 }
624
625 return get_enc_obj_id(opcode,
626 to_msrq(uobj->object)->msrq.srqn) ==
627 obj_id;
628 }
629
630 case UVERBS_OBJECT_QP:
631 {
632 struct mlx5_ib_qp *qp = to_mqp(uobj->object);
633
634 if (qp->type == IB_QPT_RAW_PACKET ||
635 (qp->flags & IB_QP_CREATE_SOURCE_QPN)) {
636 struct mlx5_ib_raw_packet_qp *raw_packet_qp =
637 &qp->raw_packet_qp;
638 struct mlx5_ib_rq *rq = &raw_packet_qp->rq;
639 struct mlx5_ib_sq *sq = &raw_packet_qp->sq;
640
641 return (get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ,
642 rq->base.mqp.qpn) == obj_id ||
643 get_enc_obj_id(MLX5_CMD_OP_CREATE_SQ,
644 sq->base.mqp.qpn) == obj_id ||
645 get_enc_obj_id(MLX5_CMD_OP_CREATE_TIR,
646 rq->tirn) == obj_id ||
647 get_enc_obj_id(MLX5_CMD_OP_CREATE_TIS,
648 sq->tisn) == obj_id);
649 }
650
651 if (qp->type == MLX5_IB_QPT_DCT)
652 return get_enc_obj_id(MLX5_CMD_OP_CREATE_DCT,
653 qp->dct.mdct.mqp.qpn) == obj_id;
654 return get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
655 qp->ibqp.qp_num) == obj_id;
656 }
657
658 case UVERBS_OBJECT_WQ:
659 return get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ,
660 to_mrwq(uobj->object)->core_qp.qpn) ==
661 obj_id;
662
663 case UVERBS_OBJECT_RWQ_IND_TBL:
664 return get_enc_obj_id(MLX5_CMD_OP_CREATE_RQT,
665 to_mrwq_ind_table(uobj->object)->rqtn) ==
666 obj_id;
667
668 case MLX5_IB_OBJECT_DEVX_OBJ:
669 {
670 u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
671 struct devx_obj *devx_uobj = uobj->object;
672
673 if (opcode == MLX5_CMD_OP_QUERY_FLOW_COUNTER &&
674 devx_uobj->flow_counter_bulk_size) {
675 u64 end;
676
677 end = devx_uobj->obj_id +
678 devx_uobj->flow_counter_bulk_size;
679 return devx_uobj->obj_id <= obj_id && end > obj_id;
680 }
681
682 return devx_uobj->obj_id == obj_id;
683 }
684
685 default:
686 return false;
687 }
688}
689
690static void devx_set_umem_valid(const void *in)
691{
692 u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
693
694 switch (opcode) {
695 case MLX5_CMD_OP_CREATE_MKEY:
696 MLX5_SET(create_mkey_in, in, mkey_umem_valid, 1);
697 break;
698 case MLX5_CMD_OP_CREATE_CQ:
699 {
700 void *cqc;
701
702 MLX5_SET(create_cq_in, in, cq_umem_valid, 1);
703 cqc = MLX5_ADDR_OF(create_cq_in, in, cq_context);
704 MLX5_SET(cqc, cqc, dbr_umem_valid, 1);
705 break;
706 }
707 case MLX5_CMD_OP_CREATE_QP:
708 {
709 void *qpc;
710
711 qpc = MLX5_ADDR_OF(create_qp_in, in, qpc);
712 MLX5_SET(qpc, qpc, dbr_umem_valid, 1);
713 MLX5_SET(create_qp_in, in, wq_umem_valid, 1);
714 break;
715 }
716
717 case MLX5_CMD_OP_CREATE_RQ:
718 {
719 void *rqc, *wq;
720
721 rqc = MLX5_ADDR_OF(create_rq_in, in, ctx);
722 wq = MLX5_ADDR_OF(rqc, rqc, wq);
723 MLX5_SET(wq, wq, dbr_umem_valid, 1);
724 MLX5_SET(wq, wq, wq_umem_valid, 1);
725 break;
726 }
727
728 case MLX5_CMD_OP_CREATE_SQ:
729 {
730 void *sqc, *wq;
731
732 sqc = MLX5_ADDR_OF(create_sq_in, in, ctx);
733 wq = MLX5_ADDR_OF(sqc, sqc, wq);
734 MLX5_SET(wq, wq, dbr_umem_valid, 1);
735 MLX5_SET(wq, wq, wq_umem_valid, 1);
736 break;
737 }
738
739 case MLX5_CMD_OP_MODIFY_CQ:
740 MLX5_SET(modify_cq_in, in, cq_umem_valid, 1);
741 break;
742
743 case MLX5_CMD_OP_CREATE_RMP:
744 {
745 void *rmpc, *wq;
746
747 rmpc = MLX5_ADDR_OF(create_rmp_in, in, ctx);
748 wq = MLX5_ADDR_OF(rmpc, rmpc, wq);
749 MLX5_SET(wq, wq, dbr_umem_valid, 1);
750 MLX5_SET(wq, wq, wq_umem_valid, 1);
751 break;
752 }
753
754 case MLX5_CMD_OP_CREATE_XRQ:
755 {
756 void *xrqc, *wq;
757
758 xrqc = MLX5_ADDR_OF(create_xrq_in, in, xrq_context);
759 wq = MLX5_ADDR_OF(xrqc, xrqc, wq);
760 MLX5_SET(wq, wq, dbr_umem_valid, 1);
761 MLX5_SET(wq, wq, wq_umem_valid, 1);
762 break;
763 }
764
765 case MLX5_CMD_OP_CREATE_XRC_SRQ:
766 {
767 void *xrc_srqc;
768
769 MLX5_SET(create_xrc_srq_in, in, xrc_srq_umem_valid, 1);
770 xrc_srqc = MLX5_ADDR_OF(create_xrc_srq_in, in,
771 xrc_srq_context_entry);
772 MLX5_SET(xrc_srqc, xrc_srqc, dbr_umem_valid, 1);
773 break;
774 }
775
776 default:
777 return;
778 }
779}
780
781static bool devx_is_obj_create_cmd(const void *in, u16 *opcode)
782{
783 *opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
784
785 switch (*opcode) {
786 case MLX5_CMD_OP_CREATE_GENERAL_OBJECT:
787 case MLX5_CMD_OP_CREATE_MKEY:
788 case MLX5_CMD_OP_CREATE_CQ:
789 case MLX5_CMD_OP_ALLOC_PD:
790 case MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN:
791 case MLX5_CMD_OP_CREATE_RMP:
792 case MLX5_CMD_OP_CREATE_SQ:
793 case MLX5_CMD_OP_CREATE_RQ:
794 case MLX5_CMD_OP_CREATE_RQT:
795 case MLX5_CMD_OP_CREATE_TIR:
796 case MLX5_CMD_OP_CREATE_TIS:
797 case MLX5_CMD_OP_ALLOC_Q_COUNTER:
798 case MLX5_CMD_OP_CREATE_FLOW_TABLE:
799 case MLX5_CMD_OP_CREATE_FLOW_GROUP:
800 case MLX5_CMD_OP_ALLOC_FLOW_COUNTER:
801 case MLX5_CMD_OP_ALLOC_PACKET_REFORMAT_CONTEXT:
802 case MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT:
803 case MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT:
804 case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
805 case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
806 case MLX5_CMD_OP_CREATE_QP:
807 case MLX5_CMD_OP_CREATE_SRQ:
808 case MLX5_CMD_OP_CREATE_XRC_SRQ:
809 case MLX5_CMD_OP_CREATE_DCT:
810 case MLX5_CMD_OP_CREATE_XRQ:
811 case MLX5_CMD_OP_ATTACH_TO_MCG:
812 case MLX5_CMD_OP_ALLOC_XRCD:
813 return true;
814 case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
815 {
816 u16 op_mod = MLX5_GET(set_fte_in, in, op_mod);
817 if (op_mod == 0)
818 return true;
819 return false;
820 }
821 case MLX5_CMD_OP_CREATE_PSV:
822 {
823 u8 num_psv = MLX5_GET(create_psv_in, in, num_psv);
824
825 if (num_psv == 1)
826 return true;
827 return false;
828 }
829 default:
830 return false;
831 }
832}
833
834static bool devx_is_obj_modify_cmd(const void *in)
835{
836 u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
837
838 switch (opcode) {
839 case MLX5_CMD_OP_MODIFY_GENERAL_OBJECT:
840 case MLX5_CMD_OP_MODIFY_CQ:
841 case MLX5_CMD_OP_MODIFY_RMP:
842 case MLX5_CMD_OP_MODIFY_SQ:
843 case MLX5_CMD_OP_MODIFY_RQ:
844 case MLX5_CMD_OP_MODIFY_RQT:
845 case MLX5_CMD_OP_MODIFY_TIR:
846 case MLX5_CMD_OP_MODIFY_TIS:
847 case MLX5_CMD_OP_MODIFY_FLOW_TABLE:
848 case MLX5_CMD_OP_MODIFY_SCHEDULING_ELEMENT:
849 case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
850 case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
851 case MLX5_CMD_OP_RST2INIT_QP:
852 case MLX5_CMD_OP_INIT2RTR_QP:
853 case MLX5_CMD_OP_INIT2INIT_QP:
854 case MLX5_CMD_OP_RTR2RTS_QP:
855 case MLX5_CMD_OP_RTS2RTS_QP:
856 case MLX5_CMD_OP_SQERR2RTS_QP:
857 case MLX5_CMD_OP_2ERR_QP:
858 case MLX5_CMD_OP_2RST_QP:
859 case MLX5_CMD_OP_ARM_XRC_SRQ:
860 case MLX5_CMD_OP_ARM_RQ:
861 case MLX5_CMD_OP_ARM_DCT_FOR_KEY_VIOLATION:
862 case MLX5_CMD_OP_ARM_XRQ:
863 case MLX5_CMD_OP_SET_XRQ_DC_PARAMS_ENTRY:
864 case MLX5_CMD_OP_RELEASE_XRQ_ERROR:
865 case MLX5_CMD_OP_MODIFY_XRQ:
866 return true;
867 case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
868 {
869 u16 op_mod = MLX5_GET(set_fte_in, in, op_mod);
870
871 if (op_mod == 1)
872 return true;
873 return false;
874 }
875 default:
876 return false;
877 }
878}
879
880static bool devx_is_obj_query_cmd(const void *in)
881{
882 u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
883
884 switch (opcode) {
885 case MLX5_CMD_OP_QUERY_GENERAL_OBJECT:
886 case MLX5_CMD_OP_QUERY_MKEY:
887 case MLX5_CMD_OP_QUERY_CQ:
888 case MLX5_CMD_OP_QUERY_RMP:
889 case MLX5_CMD_OP_QUERY_SQ:
890 case MLX5_CMD_OP_QUERY_RQ:
891 case MLX5_CMD_OP_QUERY_RQT:
892 case MLX5_CMD_OP_QUERY_TIR:
893 case MLX5_CMD_OP_QUERY_TIS:
894 case MLX5_CMD_OP_QUERY_Q_COUNTER:
895 case MLX5_CMD_OP_QUERY_FLOW_TABLE:
896 case MLX5_CMD_OP_QUERY_FLOW_GROUP:
897 case MLX5_CMD_OP_QUERY_FLOW_TABLE_ENTRY:
898 case MLX5_CMD_OP_QUERY_FLOW_COUNTER:
899 case MLX5_CMD_OP_QUERY_MODIFY_HEADER_CONTEXT:
900 case MLX5_CMD_OP_QUERY_SCHEDULING_ELEMENT:
901 case MLX5_CMD_OP_QUERY_L2_TABLE_ENTRY:
902 case MLX5_CMD_OP_QUERY_QP:
903 case MLX5_CMD_OP_QUERY_SRQ:
904 case MLX5_CMD_OP_QUERY_XRC_SRQ:
905 case MLX5_CMD_OP_QUERY_DCT:
906 case MLX5_CMD_OP_QUERY_XRQ:
907 case MLX5_CMD_OP_QUERY_XRQ_DC_PARAMS_ENTRY:
908 case MLX5_CMD_OP_QUERY_XRQ_ERROR_PARAMS:
909 case MLX5_CMD_OP_QUERY_PACKET_REFORMAT_CONTEXT:
910 return true;
911 default:
912 return false;
913 }
914}
915
916static bool devx_is_whitelist_cmd(void *in)
917{
918 u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
919
920 switch (opcode) {
921 case MLX5_CMD_OP_QUERY_HCA_CAP:
922 case MLX5_CMD_OP_QUERY_HCA_VPORT_CONTEXT:
923 case MLX5_CMD_OP_QUERY_ESW_VPORT_CONTEXT:
924 case MLX5_CMD_OP_QUERY_ESW_FUNCTIONS:
925 return true;
926 default:
927 return false;
928 }
929}
930
931static int devx_get_uid(struct mlx5_ib_ucontext *c, void *cmd_in)
932{
933 if (devx_is_whitelist_cmd(cmd_in)) {
934 struct mlx5_ib_dev *dev;
935
936 if (c->devx_uid)
937 return c->devx_uid;
938
939 dev = to_mdev(c->ibucontext.device);
940 if (dev->devx_whitelist_uid)
941 return dev->devx_whitelist_uid;
942
943 return -EOPNOTSUPP;
944 }
945
946 if (!c->devx_uid)
947 return -EINVAL;
948
949 return c->devx_uid;
950}
951
952static bool devx_is_general_cmd(void *in, struct mlx5_ib_dev *dev)
953{
954 u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
955
956 /* Pass all cmds for vhca_tunnel as general, tracking is done in FW */
957 if ((MLX5_CAP_GEN_64(dev->mdev, vhca_tunnel_commands) &&
958 MLX5_GET(general_obj_in_cmd_hdr, in, vhca_tunnel_id)) ||
959 (opcode >= MLX5_CMD_OP_GENERAL_START &&
960 opcode < MLX5_CMD_OP_GENERAL_END))
961 return true;
962
963 switch (opcode) {
964 case MLX5_CMD_OP_QUERY_HCA_CAP:
965 case MLX5_CMD_OP_QUERY_HCA_VPORT_CONTEXT:
966 case MLX5_CMD_OP_QUERY_ESW_VPORT_CONTEXT:
967 case MLX5_CMD_OP_QUERY_VPORT_STATE:
968 case MLX5_CMD_OP_QUERY_ADAPTER:
969 case MLX5_CMD_OP_QUERY_ISSI:
970 case MLX5_CMD_OP_QUERY_NIC_VPORT_CONTEXT:
971 case MLX5_CMD_OP_QUERY_ROCE_ADDRESS:
972 case MLX5_CMD_OP_QUERY_VNIC_ENV:
973 case MLX5_CMD_OP_QUERY_VPORT_COUNTER:
974 case MLX5_CMD_OP_GET_DROPPED_PACKET_LOG:
975 case MLX5_CMD_OP_NOP:
976 case MLX5_CMD_OP_QUERY_CONG_STATUS:
977 case MLX5_CMD_OP_QUERY_CONG_PARAMS:
978 case MLX5_CMD_OP_QUERY_CONG_STATISTICS:
979 case MLX5_CMD_OP_QUERY_LAG:
980 case MLX5_CMD_OP_QUERY_ESW_FUNCTIONS:
981 return true;
982 default:
983 return false;
984 }
985}
986
987static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_QUERY_EQN)(
988 struct uverbs_attr_bundle *attrs)
989{
990 struct mlx5_ib_ucontext *c;
991 struct mlx5_ib_dev *dev;
992 int user_vector;
993 int dev_eqn;
994 int err;
995
996 if (uverbs_copy_from(&user_vector, attrs,
997 MLX5_IB_ATTR_DEVX_QUERY_EQN_USER_VEC))
998 return -EFAULT;
999
1000 c = devx_ufile2uctx(attrs);
1001 if (IS_ERR(c))
1002 return PTR_ERR(c);
1003 dev = to_mdev(c->ibucontext.device);
1004
1005 err = mlx5_comp_eqn_get(dev->mdev, user_vector, &dev_eqn);
1006 if (err < 0)
1007 return err;
1008
1009 if (uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_QUERY_EQN_DEV_EQN,
1010 &dev_eqn, sizeof(dev_eqn)))
1011 return -EFAULT;
1012
1013 return 0;
1014}
1015
1016/*
1017 *Security note:
1018 * The hardware protection mechanism works like this: Each device object that
1019 * is subject to UAR doorbells (QP/SQ/CQ) gets a UAR ID (called uar_page in
1020 * the device specification manual) upon its creation. Then upon doorbell,
1021 * hardware fetches the object context for which the doorbell was rang, and
1022 * validates that the UAR through which the DB was rang matches the UAR ID
1023 * of the object.
1024 * If no match the doorbell is silently ignored by the hardware. Of course,
1025 * the user cannot ring a doorbell on a UAR that was not mapped to it.
1026 * Now in devx, as the devx kernel does not manipulate the QP/SQ/CQ command
1027 * mailboxes (except tagging them with UID), we expose to the user its UAR
1028 * ID, so it can embed it in these objects in the expected specification
1029 * format. So the only thing the user can do is hurt itself by creating a
1030 * QP/SQ/CQ with a UAR ID other than his, and then in this case other users
1031 * may ring a doorbell on its objects.
1032 * The consequence of that will be that another user can schedule a QP/SQ
1033 * of the buggy user for execution (just insert it to the hardware schedule
1034 * queue or arm its CQ for event generation), no further harm is expected.
1035 */
1036static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_QUERY_UAR)(
1037 struct uverbs_attr_bundle *attrs)
1038{
1039 struct mlx5_ib_ucontext *c;
1040 struct mlx5_ib_dev *dev;
1041 u32 user_idx;
1042 s32 dev_idx;
1043
1044 c = devx_ufile2uctx(attrs);
1045 if (IS_ERR(c))
1046 return PTR_ERR(c);
1047 dev = to_mdev(c->ibucontext.device);
1048
1049 if (uverbs_copy_from(&user_idx, attrs,
1050 MLX5_IB_ATTR_DEVX_QUERY_UAR_USER_IDX))
1051 return -EFAULT;
1052
1053 dev_idx = bfregn_to_uar_index(dev, &c->bfregi, user_idx, true);
1054 if (dev_idx < 0)
1055 return dev_idx;
1056
1057 if (uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_QUERY_UAR_DEV_IDX,
1058 &dev_idx, sizeof(dev_idx)))
1059 return -EFAULT;
1060
1061 return 0;
1062}
1063
1064static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OTHER)(
1065 struct uverbs_attr_bundle *attrs)
1066{
1067 struct mlx5_ib_ucontext *c;
1068 struct mlx5_ib_dev *dev;
1069 void *cmd_in = uverbs_attr_get_alloced_ptr(
1070 attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_IN);
1071 int cmd_out_len = uverbs_attr_get_len(attrs,
1072 MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT);
1073 void *cmd_out;
1074 int err, err2;
1075 int uid;
1076
1077 c = devx_ufile2uctx(attrs);
1078 if (IS_ERR(c))
1079 return PTR_ERR(c);
1080 dev = to_mdev(c->ibucontext.device);
1081
1082 uid = devx_get_uid(c, cmd_in);
1083 if (uid < 0)
1084 return uid;
1085
1086 /* Only white list of some general HCA commands are allowed for this method. */
1087 if (!devx_is_general_cmd(cmd_in, dev))
1088 return -EINVAL;
1089
1090 cmd_out = uverbs_zalloc(attrs, cmd_out_len);
1091 if (IS_ERR(cmd_out))
1092 return PTR_ERR(cmd_out);
1093
1094 MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1095 err = mlx5_cmd_do(dev->mdev, cmd_in,
1096 uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_IN),
1097 cmd_out, cmd_out_len);
1098 if (err && err != -EREMOTEIO)
1099 return err;
1100
1101 err2 = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT, cmd_out,
1102 cmd_out_len);
1103
1104 return err2 ?: err;
1105}
1106
1107static void devx_obj_build_destroy_cmd(void *in, void *out, void *din,
1108 u32 *dinlen,
1109 u32 *obj_id)
1110{
1111 u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
1112 u16 uid = MLX5_GET(general_obj_in_cmd_hdr, in, uid);
1113
1114 *obj_id = devx_get_created_obj_id(in, out, opcode);
1115 *dinlen = MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr);
1116 MLX5_SET(general_obj_in_cmd_hdr, din, uid, uid);
1117
1118 switch (opcode) {
1119 case MLX5_CMD_OP_CREATE_GENERAL_OBJECT:
1120 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_GENERAL_OBJECT);
1121 MLX5_SET(general_obj_in_cmd_hdr, din, obj_id, *obj_id);
1122 MLX5_SET(general_obj_in_cmd_hdr, din, obj_type,
1123 MLX5_GET(general_obj_in_cmd_hdr, in, obj_type));
1124 break;
1125
1126 case MLX5_CMD_OP_CREATE_UMEM:
1127 MLX5_SET(destroy_umem_in, din, opcode,
1128 MLX5_CMD_OP_DESTROY_UMEM);
1129 MLX5_SET(destroy_umem_in, din, umem_id, *obj_id);
1130 break;
1131 case MLX5_CMD_OP_CREATE_MKEY:
1132 MLX5_SET(destroy_mkey_in, din, opcode,
1133 MLX5_CMD_OP_DESTROY_MKEY);
1134 MLX5_SET(destroy_mkey_in, din, mkey_index, *obj_id);
1135 break;
1136 case MLX5_CMD_OP_CREATE_CQ:
1137 MLX5_SET(destroy_cq_in, din, opcode, MLX5_CMD_OP_DESTROY_CQ);
1138 MLX5_SET(destroy_cq_in, din, cqn, *obj_id);
1139 break;
1140 case MLX5_CMD_OP_ALLOC_PD:
1141 MLX5_SET(dealloc_pd_in, din, opcode, MLX5_CMD_OP_DEALLOC_PD);
1142 MLX5_SET(dealloc_pd_in, din, pd, *obj_id);
1143 break;
1144 case MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN:
1145 MLX5_SET(dealloc_transport_domain_in, din, opcode,
1146 MLX5_CMD_OP_DEALLOC_TRANSPORT_DOMAIN);
1147 MLX5_SET(dealloc_transport_domain_in, din, transport_domain,
1148 *obj_id);
1149 break;
1150 case MLX5_CMD_OP_CREATE_RMP:
1151 MLX5_SET(destroy_rmp_in, din, opcode, MLX5_CMD_OP_DESTROY_RMP);
1152 MLX5_SET(destroy_rmp_in, din, rmpn, *obj_id);
1153 break;
1154 case MLX5_CMD_OP_CREATE_SQ:
1155 MLX5_SET(destroy_sq_in, din, opcode, MLX5_CMD_OP_DESTROY_SQ);
1156 MLX5_SET(destroy_sq_in, din, sqn, *obj_id);
1157 break;
1158 case MLX5_CMD_OP_CREATE_RQ:
1159 MLX5_SET(destroy_rq_in, din, opcode, MLX5_CMD_OP_DESTROY_RQ);
1160 MLX5_SET(destroy_rq_in, din, rqn, *obj_id);
1161 break;
1162 case MLX5_CMD_OP_CREATE_RQT:
1163 MLX5_SET(destroy_rqt_in, din, opcode, MLX5_CMD_OP_DESTROY_RQT);
1164 MLX5_SET(destroy_rqt_in, din, rqtn, *obj_id);
1165 break;
1166 case MLX5_CMD_OP_CREATE_TIR:
1167 MLX5_SET(destroy_tir_in, din, opcode, MLX5_CMD_OP_DESTROY_TIR);
1168 MLX5_SET(destroy_tir_in, din, tirn, *obj_id);
1169 break;
1170 case MLX5_CMD_OP_CREATE_TIS:
1171 MLX5_SET(destroy_tis_in, din, opcode, MLX5_CMD_OP_DESTROY_TIS);
1172 MLX5_SET(destroy_tis_in, din, tisn, *obj_id);
1173 break;
1174 case MLX5_CMD_OP_ALLOC_Q_COUNTER:
1175 MLX5_SET(dealloc_q_counter_in, din, opcode,
1176 MLX5_CMD_OP_DEALLOC_Q_COUNTER);
1177 MLX5_SET(dealloc_q_counter_in, din, counter_set_id, *obj_id);
1178 break;
1179 case MLX5_CMD_OP_CREATE_FLOW_TABLE:
1180 *dinlen = MLX5_ST_SZ_BYTES(destroy_flow_table_in);
1181 MLX5_SET(destroy_flow_table_in, din, other_vport,
1182 MLX5_GET(create_flow_table_in, in, other_vport));
1183 MLX5_SET(destroy_flow_table_in, din, vport_number,
1184 MLX5_GET(create_flow_table_in, in, vport_number));
1185 MLX5_SET(destroy_flow_table_in, din, table_type,
1186 MLX5_GET(create_flow_table_in, in, table_type));
1187 MLX5_SET(destroy_flow_table_in, din, table_id, *obj_id);
1188 MLX5_SET(destroy_flow_table_in, din, opcode,
1189 MLX5_CMD_OP_DESTROY_FLOW_TABLE);
1190 break;
1191 case MLX5_CMD_OP_CREATE_FLOW_GROUP:
1192 *dinlen = MLX5_ST_SZ_BYTES(destroy_flow_group_in);
1193 MLX5_SET(destroy_flow_group_in, din, other_vport,
1194 MLX5_GET(create_flow_group_in, in, other_vport));
1195 MLX5_SET(destroy_flow_group_in, din, vport_number,
1196 MLX5_GET(create_flow_group_in, in, vport_number));
1197 MLX5_SET(destroy_flow_group_in, din, table_type,
1198 MLX5_GET(create_flow_group_in, in, table_type));
1199 MLX5_SET(destroy_flow_group_in, din, table_id,
1200 MLX5_GET(create_flow_group_in, in, table_id));
1201 MLX5_SET(destroy_flow_group_in, din, group_id, *obj_id);
1202 MLX5_SET(destroy_flow_group_in, din, opcode,
1203 MLX5_CMD_OP_DESTROY_FLOW_GROUP);
1204 break;
1205 case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
1206 *dinlen = MLX5_ST_SZ_BYTES(delete_fte_in);
1207 MLX5_SET(delete_fte_in, din, other_vport,
1208 MLX5_GET(set_fte_in, in, other_vport));
1209 MLX5_SET(delete_fte_in, din, vport_number,
1210 MLX5_GET(set_fte_in, in, vport_number));
1211 MLX5_SET(delete_fte_in, din, table_type,
1212 MLX5_GET(set_fte_in, in, table_type));
1213 MLX5_SET(delete_fte_in, din, table_id,
1214 MLX5_GET(set_fte_in, in, table_id));
1215 MLX5_SET(delete_fte_in, din, flow_index, *obj_id);
1216 MLX5_SET(delete_fte_in, din, opcode,
1217 MLX5_CMD_OP_DELETE_FLOW_TABLE_ENTRY);
1218 break;
1219 case MLX5_CMD_OP_ALLOC_FLOW_COUNTER:
1220 MLX5_SET(dealloc_flow_counter_in, din, opcode,
1221 MLX5_CMD_OP_DEALLOC_FLOW_COUNTER);
1222 MLX5_SET(dealloc_flow_counter_in, din, flow_counter_id,
1223 *obj_id);
1224 break;
1225 case MLX5_CMD_OP_ALLOC_PACKET_REFORMAT_CONTEXT:
1226 MLX5_SET(dealloc_packet_reformat_context_in, din, opcode,
1227 MLX5_CMD_OP_DEALLOC_PACKET_REFORMAT_CONTEXT);
1228 MLX5_SET(dealloc_packet_reformat_context_in, din,
1229 packet_reformat_id, *obj_id);
1230 break;
1231 case MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT:
1232 MLX5_SET(dealloc_modify_header_context_in, din, opcode,
1233 MLX5_CMD_OP_DEALLOC_MODIFY_HEADER_CONTEXT);
1234 MLX5_SET(dealloc_modify_header_context_in, din,
1235 modify_header_id, *obj_id);
1236 break;
1237 case MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT:
1238 *dinlen = MLX5_ST_SZ_BYTES(destroy_scheduling_element_in);
1239 MLX5_SET(destroy_scheduling_element_in, din,
1240 scheduling_hierarchy,
1241 MLX5_GET(create_scheduling_element_in, in,
1242 scheduling_hierarchy));
1243 MLX5_SET(destroy_scheduling_element_in, din,
1244 scheduling_element_id, *obj_id);
1245 MLX5_SET(destroy_scheduling_element_in, din, opcode,
1246 MLX5_CMD_OP_DESTROY_SCHEDULING_ELEMENT);
1247 break;
1248 case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
1249 *dinlen = MLX5_ST_SZ_BYTES(delete_vxlan_udp_dport_in);
1250 MLX5_SET(delete_vxlan_udp_dport_in, din, vxlan_udp_port, *obj_id);
1251 MLX5_SET(delete_vxlan_udp_dport_in, din, opcode,
1252 MLX5_CMD_OP_DELETE_VXLAN_UDP_DPORT);
1253 break;
1254 case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
1255 *dinlen = MLX5_ST_SZ_BYTES(delete_l2_table_entry_in);
1256 MLX5_SET(delete_l2_table_entry_in, din, table_index, *obj_id);
1257 MLX5_SET(delete_l2_table_entry_in, din, opcode,
1258 MLX5_CMD_OP_DELETE_L2_TABLE_ENTRY);
1259 break;
1260 case MLX5_CMD_OP_CREATE_QP:
1261 MLX5_SET(destroy_qp_in, din, opcode, MLX5_CMD_OP_DESTROY_QP);
1262 MLX5_SET(destroy_qp_in, din, qpn, *obj_id);
1263 break;
1264 case MLX5_CMD_OP_CREATE_SRQ:
1265 MLX5_SET(destroy_srq_in, din, opcode, MLX5_CMD_OP_DESTROY_SRQ);
1266 MLX5_SET(destroy_srq_in, din, srqn, *obj_id);
1267 break;
1268 case MLX5_CMD_OP_CREATE_XRC_SRQ:
1269 MLX5_SET(destroy_xrc_srq_in, din, opcode,
1270 MLX5_CMD_OP_DESTROY_XRC_SRQ);
1271 MLX5_SET(destroy_xrc_srq_in, din, xrc_srqn, *obj_id);
1272 break;
1273 case MLX5_CMD_OP_CREATE_DCT:
1274 MLX5_SET(destroy_dct_in, din, opcode, MLX5_CMD_OP_DESTROY_DCT);
1275 MLX5_SET(destroy_dct_in, din, dctn, *obj_id);
1276 break;
1277 case MLX5_CMD_OP_CREATE_XRQ:
1278 MLX5_SET(destroy_xrq_in, din, opcode, MLX5_CMD_OP_DESTROY_XRQ);
1279 MLX5_SET(destroy_xrq_in, din, xrqn, *obj_id);
1280 break;
1281 case MLX5_CMD_OP_ATTACH_TO_MCG:
1282 *dinlen = MLX5_ST_SZ_BYTES(detach_from_mcg_in);
1283 MLX5_SET(detach_from_mcg_in, din, qpn,
1284 MLX5_GET(attach_to_mcg_in, in, qpn));
1285 memcpy(MLX5_ADDR_OF(detach_from_mcg_in, din, multicast_gid),
1286 MLX5_ADDR_OF(attach_to_mcg_in, in, multicast_gid),
1287 MLX5_FLD_SZ_BYTES(attach_to_mcg_in, multicast_gid));
1288 MLX5_SET(detach_from_mcg_in, din, opcode,
1289 MLX5_CMD_OP_DETACH_FROM_MCG);
1290 MLX5_SET(detach_from_mcg_in, din, qpn, *obj_id);
1291 break;
1292 case MLX5_CMD_OP_ALLOC_XRCD:
1293 MLX5_SET(dealloc_xrcd_in, din, opcode,
1294 MLX5_CMD_OP_DEALLOC_XRCD);
1295 MLX5_SET(dealloc_xrcd_in, din, xrcd, *obj_id);
1296 break;
1297 case MLX5_CMD_OP_CREATE_PSV:
1298 MLX5_SET(destroy_psv_in, din, opcode,
1299 MLX5_CMD_OP_DESTROY_PSV);
1300 MLX5_SET(destroy_psv_in, din, psvn, *obj_id);
1301 break;
1302 default:
1303 /* The entry must match to one of the devx_is_obj_create_cmd */
1304 WARN_ON(true);
1305 break;
1306 }
1307}
1308
1309static int devx_handle_mkey_indirect(struct devx_obj *obj,
1310 struct mlx5_ib_dev *dev,
1311 void *in, void *out)
1312{
1313 struct mlx5_ib_mkey *mkey = &obj->mkey;
1314 void *mkc;
1315 u8 key;
1316
1317 mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry);
1318 key = MLX5_GET(mkc, mkc, mkey_7_0);
1319 mkey->key = mlx5_idx_to_mkey(
1320 MLX5_GET(create_mkey_out, out, mkey_index)) | key;
1321 mkey->type = MLX5_MKEY_INDIRECT_DEVX;
1322 mkey->ndescs = MLX5_GET(mkc, mkc, translations_octword_size);
1323 init_waitqueue_head(&mkey->wait);
1324
1325 return mlx5r_store_odp_mkey(dev, mkey);
1326}
1327
1328static int devx_handle_mkey_create(struct mlx5_ib_dev *dev,
1329 struct devx_obj *obj,
1330 void *in, int in_len)
1331{
1332 int min_len = MLX5_BYTE_OFF(create_mkey_in, memory_key_mkey_entry) +
1333 MLX5_FLD_SZ_BYTES(create_mkey_in,
1334 memory_key_mkey_entry);
1335 void *mkc;
1336 u8 access_mode;
1337
1338 if (in_len < min_len)
1339 return -EINVAL;
1340
1341 mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry);
1342
1343 access_mode = MLX5_GET(mkc, mkc, access_mode_1_0);
1344 access_mode |= MLX5_GET(mkc, mkc, access_mode_4_2) << 2;
1345
1346 if (access_mode == MLX5_MKC_ACCESS_MODE_KLMS ||
1347 access_mode == MLX5_MKC_ACCESS_MODE_KSM) {
1348 if (IS_ENABLED(CONFIG_INFINIBAND_ON_DEMAND_PAGING))
1349 obj->flags |= DEVX_OBJ_FLAGS_INDIRECT_MKEY;
1350 return 0;
1351 }
1352
1353 MLX5_SET(create_mkey_in, in, mkey_umem_valid, 1);
1354 return 0;
1355}
1356
1357static void devx_cleanup_subscription(struct mlx5_ib_dev *dev,
1358 struct devx_event_subscription *sub)
1359{
1360 struct devx_event *event;
1361 struct devx_obj_event *xa_val_level2;
1362
1363 if (sub->is_cleaned)
1364 return;
1365
1366 sub->is_cleaned = 1;
1367 list_del_rcu(&sub->xa_list);
1368
1369 if (list_empty(&sub->obj_list))
1370 return;
1371
1372 list_del_rcu(&sub->obj_list);
1373 /* check whether key level 1 for this obj_sub_list is empty */
1374 event = xa_load(&dev->devx_event_table.event_xa,
1375 sub->xa_key_level1);
1376 WARN_ON(!event);
1377
1378 xa_val_level2 = xa_load(&event->object_ids, sub->xa_key_level2);
1379 if (list_empty(&xa_val_level2->obj_sub_list)) {
1380 xa_erase(&event->object_ids,
1381 sub->xa_key_level2);
1382 kfree_rcu(xa_val_level2, rcu);
1383 }
1384}
1385
1386static int devx_obj_cleanup(struct ib_uobject *uobject,
1387 enum rdma_remove_reason why,
1388 struct uverbs_attr_bundle *attrs)
1389{
1390 u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
1391 struct mlx5_devx_event_table *devx_event_table;
1392 struct devx_obj *obj = uobject->object;
1393 struct devx_event_subscription *sub_entry, *tmp;
1394 struct mlx5_ib_dev *dev;
1395 int ret;
1396
1397 dev = mlx5_udata_to_mdev(&attrs->driver_udata);
1398 if (obj->flags & DEVX_OBJ_FLAGS_INDIRECT_MKEY &&
1399 xa_erase(&obj->ib_dev->odp_mkeys,
1400 mlx5_base_mkey(obj->mkey.key)))
1401 /*
1402 * The pagefault_single_data_segment() does commands against
1403 * the mmkey, we must wait for that to stop before freeing the
1404 * mkey, as another allocation could get the same mkey #.
1405 */
1406 mlx5r_deref_wait_odp_mkey(&obj->mkey);
1407
1408 if (obj->flags & DEVX_OBJ_FLAGS_DCT)
1409 ret = mlx5_core_destroy_dct(obj->ib_dev, &obj->core_dct);
1410 else if (obj->flags & DEVX_OBJ_FLAGS_CQ)
1411 ret = mlx5_core_destroy_cq(obj->ib_dev->mdev, &obj->core_cq);
1412 else
1413 ret = mlx5_cmd_exec(obj->ib_dev->mdev, obj->dinbox,
1414 obj->dinlen, out, sizeof(out));
1415 if (ret)
1416 return ret;
1417
1418 devx_event_table = &dev->devx_event_table;
1419
1420 mutex_lock(&devx_event_table->event_xa_lock);
1421 list_for_each_entry_safe(sub_entry, tmp, &obj->event_sub, obj_list)
1422 devx_cleanup_subscription(dev, sub_entry);
1423 mutex_unlock(&devx_event_table->event_xa_lock);
1424
1425 kfree(obj);
1426 return ret;
1427}
1428
1429static void devx_cq_comp(struct mlx5_core_cq *mcq, struct mlx5_eqe *eqe)
1430{
1431 struct devx_obj *obj = container_of(mcq, struct devx_obj, core_cq);
1432 struct mlx5_devx_event_table *table;
1433 struct devx_event *event;
1434 struct devx_obj_event *obj_event;
1435 u32 obj_id = mcq->cqn;
1436
1437 table = &obj->ib_dev->devx_event_table;
1438 rcu_read_lock();
1439 event = xa_load(&table->event_xa, MLX5_EVENT_TYPE_COMP);
1440 if (!event)
1441 goto out;
1442
1443 obj_event = xa_load(&event->object_ids, obj_id);
1444 if (!obj_event)
1445 goto out;
1446
1447 dispatch_event_fd(&obj_event->obj_sub_list, eqe);
1448out:
1449 rcu_read_unlock();
1450}
1451
1452static bool is_apu_cq(struct mlx5_ib_dev *dev, const void *in)
1453{
1454 if (!MLX5_CAP_GEN(dev->mdev, apu) ||
1455 !MLX5_GET(cqc, MLX5_ADDR_OF(create_cq_in, in, cq_context), apu_cq))
1456 return false;
1457
1458 return true;
1459}
1460
1461static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_CREATE)(
1462 struct uverbs_attr_bundle *attrs)
1463{
1464 void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN);
1465 int cmd_out_len = uverbs_attr_get_len(attrs,
1466 MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT);
1467 int cmd_in_len = uverbs_attr_get_len(attrs,
1468 MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN);
1469 void *cmd_out;
1470 struct ib_uobject *uobj = uverbs_attr_get_uobject(
1471 attrs, MLX5_IB_ATTR_DEVX_OBJ_CREATE_HANDLE);
1472 struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1473 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1474 struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
1475 u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
1476 struct devx_obj *obj;
1477 u16 obj_type = 0;
1478 int err, err2 = 0;
1479 int uid;
1480 u32 obj_id;
1481 u16 opcode;
1482
1483 if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id))
1484 return -EINVAL;
1485
1486 uid = devx_get_uid(c, cmd_in);
1487 if (uid < 0)
1488 return uid;
1489
1490 if (!devx_is_obj_create_cmd(cmd_in, &opcode))
1491 return -EINVAL;
1492
1493 cmd_out = uverbs_zalloc(attrs, cmd_out_len);
1494 if (IS_ERR(cmd_out))
1495 return PTR_ERR(cmd_out);
1496
1497 obj = kzalloc(sizeof(struct devx_obj), GFP_KERNEL);
1498 if (!obj)
1499 return -ENOMEM;
1500
1501 MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1502 if (opcode == MLX5_CMD_OP_CREATE_MKEY) {
1503 err = devx_handle_mkey_create(dev, obj, cmd_in, cmd_in_len);
1504 if (err)
1505 goto obj_free;
1506 } else {
1507 devx_set_umem_valid(cmd_in);
1508 }
1509
1510 if (opcode == MLX5_CMD_OP_CREATE_DCT) {
1511 obj->flags |= DEVX_OBJ_FLAGS_DCT;
1512 err = mlx5_core_create_dct(dev, &obj->core_dct, cmd_in,
1513 cmd_in_len, cmd_out, cmd_out_len);
1514 } else if (opcode == MLX5_CMD_OP_CREATE_CQ &&
1515 !is_apu_cq(dev, cmd_in)) {
1516 obj->flags |= DEVX_OBJ_FLAGS_CQ;
1517 obj->core_cq.comp = devx_cq_comp;
1518 err = mlx5_create_cq(dev->mdev, &obj->core_cq,
1519 cmd_in, cmd_in_len, cmd_out,
1520 cmd_out_len);
1521 } else {
1522 err = mlx5_cmd_do(dev->mdev, cmd_in, cmd_in_len,
1523 cmd_out, cmd_out_len);
1524 }
1525
1526 if (err == -EREMOTEIO)
1527 err2 = uverbs_copy_to(attrs,
1528 MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT,
1529 cmd_out, cmd_out_len);
1530 if (err)
1531 goto obj_free;
1532
1533 if (opcode == MLX5_CMD_OP_ALLOC_FLOW_COUNTER) {
1534 u32 bulk = MLX5_GET(alloc_flow_counter_in,
1535 cmd_in,
1536 flow_counter_bulk_log_size);
1537
1538 if (bulk)
1539 bulk = 1 << bulk;
1540 else
1541 bulk = 128UL * MLX5_GET(alloc_flow_counter_in,
1542 cmd_in,
1543 flow_counter_bulk);
1544 obj->flow_counter_bulk_size = bulk;
1545 }
1546
1547 uobj->object = obj;
1548 INIT_LIST_HEAD(&obj->event_sub);
1549 obj->ib_dev = dev;
1550 devx_obj_build_destroy_cmd(cmd_in, cmd_out, obj->dinbox, &obj->dinlen,
1551 &obj_id);
1552 WARN_ON(obj->dinlen > MLX5_MAX_DESTROY_INBOX_SIZE_DW * sizeof(u32));
1553
1554 err = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT, cmd_out, cmd_out_len);
1555 if (err)
1556 goto obj_destroy;
1557
1558 if (opcode == MLX5_CMD_OP_CREATE_GENERAL_OBJECT)
1559 obj_type = MLX5_GET(general_obj_in_cmd_hdr, cmd_in, obj_type);
1560 obj->obj_id = get_enc_obj_id(opcode | obj_type << 16, obj_id);
1561
1562 if (obj->flags & DEVX_OBJ_FLAGS_INDIRECT_MKEY) {
1563 err = devx_handle_mkey_indirect(obj, dev, cmd_in, cmd_out);
1564 if (err)
1565 goto obj_destroy;
1566 }
1567 return 0;
1568
1569obj_destroy:
1570 if (obj->flags & DEVX_OBJ_FLAGS_DCT)
1571 mlx5_core_destroy_dct(obj->ib_dev, &obj->core_dct);
1572 else if (obj->flags & DEVX_OBJ_FLAGS_CQ)
1573 mlx5_core_destroy_cq(obj->ib_dev->mdev, &obj->core_cq);
1574 else
1575 mlx5_cmd_exec(obj->ib_dev->mdev, obj->dinbox, obj->dinlen, out,
1576 sizeof(out));
1577obj_free:
1578 kfree(obj);
1579 return err2 ?: err;
1580}
1581
1582static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_MODIFY)(
1583 struct uverbs_attr_bundle *attrs)
1584{
1585 void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN);
1586 int cmd_out_len = uverbs_attr_get_len(attrs,
1587 MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT);
1588 struct ib_uobject *uobj = uverbs_attr_get_uobject(attrs,
1589 MLX5_IB_ATTR_DEVX_OBJ_MODIFY_HANDLE);
1590 struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1591 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1592 struct mlx5_ib_dev *mdev = to_mdev(c->ibucontext.device);
1593 void *cmd_out;
1594 int err, err2;
1595 int uid;
1596
1597 if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id))
1598 return -EINVAL;
1599
1600 uid = devx_get_uid(c, cmd_in);
1601 if (uid < 0)
1602 return uid;
1603
1604 if (!devx_is_obj_modify_cmd(cmd_in))
1605 return -EINVAL;
1606
1607 if (!devx_is_valid_obj_id(attrs, uobj, cmd_in))
1608 return -EINVAL;
1609
1610 cmd_out = uverbs_zalloc(attrs, cmd_out_len);
1611 if (IS_ERR(cmd_out))
1612 return PTR_ERR(cmd_out);
1613
1614 MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1615 devx_set_umem_valid(cmd_in);
1616
1617 err = mlx5_cmd_do(mdev->mdev, cmd_in,
1618 uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN),
1619 cmd_out, cmd_out_len);
1620 if (err && err != -EREMOTEIO)
1621 return err;
1622
1623 err2 = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT,
1624 cmd_out, cmd_out_len);
1625
1626 return err2 ?: err;
1627}
1628
1629static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_QUERY)(
1630 struct uverbs_attr_bundle *attrs)
1631{
1632 void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN);
1633 int cmd_out_len = uverbs_attr_get_len(attrs,
1634 MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT);
1635 struct ib_uobject *uobj = uverbs_attr_get_uobject(attrs,
1636 MLX5_IB_ATTR_DEVX_OBJ_QUERY_HANDLE);
1637 struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1638 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1639 void *cmd_out;
1640 int err, err2;
1641 int uid;
1642 struct mlx5_ib_dev *mdev = to_mdev(c->ibucontext.device);
1643
1644 if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id))
1645 return -EINVAL;
1646
1647 uid = devx_get_uid(c, cmd_in);
1648 if (uid < 0)
1649 return uid;
1650
1651 if (!devx_is_obj_query_cmd(cmd_in))
1652 return -EINVAL;
1653
1654 if (!devx_is_valid_obj_id(attrs, uobj, cmd_in))
1655 return -EINVAL;
1656
1657 cmd_out = uverbs_zalloc(attrs, cmd_out_len);
1658 if (IS_ERR(cmd_out))
1659 return PTR_ERR(cmd_out);
1660
1661 MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1662 err = mlx5_cmd_do(mdev->mdev, cmd_in,
1663 uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN),
1664 cmd_out, cmd_out_len);
1665 if (err && err != -EREMOTEIO)
1666 return err;
1667
1668 err2 = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT,
1669 cmd_out, cmd_out_len);
1670
1671 return err2 ?: err;
1672}
1673
1674struct devx_async_event_queue {
1675 spinlock_t lock;
1676 wait_queue_head_t poll_wait;
1677 struct list_head event_list;
1678 atomic_t bytes_in_use;
1679 u8 is_destroyed:1;
1680};
1681
1682struct devx_async_cmd_event_file {
1683 struct ib_uobject uobj;
1684 struct devx_async_event_queue ev_queue;
1685 struct mlx5_async_ctx async_ctx;
1686};
1687
1688static void devx_init_event_queue(struct devx_async_event_queue *ev_queue)
1689{
1690 spin_lock_init(&ev_queue->lock);
1691 INIT_LIST_HEAD(&ev_queue->event_list);
1692 init_waitqueue_head(&ev_queue->poll_wait);
1693 atomic_set(&ev_queue->bytes_in_use, 0);
1694 ev_queue->is_destroyed = 0;
1695}
1696
1697static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC)(
1698 struct uverbs_attr_bundle *attrs)
1699{
1700 struct devx_async_cmd_event_file *ev_file;
1701
1702 struct ib_uobject *uobj = uverbs_attr_get_uobject(
1703 attrs, MLX5_IB_ATTR_DEVX_ASYNC_CMD_FD_ALLOC_HANDLE);
1704 struct mlx5_ib_dev *mdev = mlx5_udata_to_mdev(&attrs->driver_udata);
1705
1706 ev_file = container_of(uobj, struct devx_async_cmd_event_file,
1707 uobj);
1708 devx_init_event_queue(&ev_file->ev_queue);
1709 mlx5_cmd_init_async_ctx(mdev->mdev, &ev_file->async_ctx);
1710 return 0;
1711}
1712
1713static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC)(
1714 struct uverbs_attr_bundle *attrs)
1715{
1716 struct ib_uobject *uobj = uverbs_attr_get_uobject(
1717 attrs, MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_HANDLE);
1718 struct devx_async_event_file *ev_file;
1719 struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1720 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1721 struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
1722 u32 flags;
1723 int err;
1724
1725 err = uverbs_get_flags32(&flags, attrs,
1726 MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_FLAGS,
1727 MLX5_IB_UAPI_DEVX_CR_EV_CH_FLAGS_OMIT_DATA);
1728
1729 if (err)
1730 return err;
1731
1732 ev_file = container_of(uobj, struct devx_async_event_file,
1733 uobj);
1734 spin_lock_init(&ev_file->lock);
1735 INIT_LIST_HEAD(&ev_file->event_list);
1736 init_waitqueue_head(&ev_file->poll_wait);
1737 if (flags & MLX5_IB_UAPI_DEVX_CR_EV_CH_FLAGS_OMIT_DATA)
1738 ev_file->omit_data = 1;
1739 INIT_LIST_HEAD(&ev_file->subscribed_events_list);
1740 ev_file->dev = dev;
1741 get_device(&dev->ib_dev.dev);
1742 return 0;
1743}
1744
1745static void devx_query_callback(int status, struct mlx5_async_work *context)
1746{
1747 struct devx_async_data *async_data =
1748 container_of(context, struct devx_async_data, cb_work);
1749 struct devx_async_cmd_event_file *ev_file = async_data->ev_file;
1750 struct devx_async_event_queue *ev_queue = &ev_file->ev_queue;
1751 unsigned long flags;
1752
1753 /*
1754 * Note that if the struct devx_async_cmd_event_file uobj begins to be
1755 * destroyed it will block at mlx5_cmd_cleanup_async_ctx() until this
1756 * routine returns, ensuring that it always remains valid here.
1757 */
1758 spin_lock_irqsave(&ev_queue->lock, flags);
1759 list_add_tail(&async_data->list, &ev_queue->event_list);
1760 spin_unlock_irqrestore(&ev_queue->lock, flags);
1761
1762 wake_up_interruptible(&ev_queue->poll_wait);
1763}
1764
1765#define MAX_ASYNC_BYTES_IN_USE (1024 * 1024) /* 1MB */
1766
1767static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_ASYNC_QUERY)(
1768 struct uverbs_attr_bundle *attrs)
1769{
1770 void *cmd_in = uverbs_attr_get_alloced_ptr(attrs,
1771 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_CMD_IN);
1772 struct ib_uobject *uobj = uverbs_attr_get_uobject(
1773 attrs,
1774 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_HANDLE);
1775 u16 cmd_out_len;
1776 struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1777 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1778 struct ib_uobject *fd_uobj;
1779 int err;
1780 int uid;
1781 struct mlx5_ib_dev *mdev = to_mdev(c->ibucontext.device);
1782 struct devx_async_cmd_event_file *ev_file;
1783 struct devx_async_data *async_data;
1784
1785 if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id))
1786 return -EINVAL;
1787
1788 uid = devx_get_uid(c, cmd_in);
1789 if (uid < 0)
1790 return uid;
1791
1792 if (!devx_is_obj_query_cmd(cmd_in))
1793 return -EINVAL;
1794
1795 err = uverbs_get_const(&cmd_out_len, attrs,
1796 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_OUT_LEN);
1797 if (err)
1798 return err;
1799
1800 if (!devx_is_valid_obj_id(attrs, uobj, cmd_in))
1801 return -EINVAL;
1802
1803 fd_uobj = uverbs_attr_get_uobject(attrs,
1804 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_FD);
1805 if (IS_ERR(fd_uobj))
1806 return PTR_ERR(fd_uobj);
1807
1808 ev_file = container_of(fd_uobj, struct devx_async_cmd_event_file,
1809 uobj);
1810
1811 if (atomic_add_return(cmd_out_len, &ev_file->ev_queue.bytes_in_use) >
1812 MAX_ASYNC_BYTES_IN_USE) {
1813 atomic_sub(cmd_out_len, &ev_file->ev_queue.bytes_in_use);
1814 return -EAGAIN;
1815 }
1816
1817 async_data = kvzalloc(struct_size(async_data, hdr.out_data,
1818 cmd_out_len), GFP_KERNEL);
1819 if (!async_data) {
1820 err = -ENOMEM;
1821 goto sub_bytes;
1822 }
1823
1824 err = uverbs_copy_from(&async_data->hdr.wr_id, attrs,
1825 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_WR_ID);
1826 if (err)
1827 goto free_async;
1828
1829 async_data->cmd_out_len = cmd_out_len;
1830 async_data->mdev = mdev;
1831 async_data->ev_file = ev_file;
1832
1833 MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1834 err = mlx5_cmd_exec_cb(&ev_file->async_ctx, cmd_in,
1835 uverbs_attr_get_len(attrs,
1836 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_CMD_IN),
1837 async_data->hdr.out_data,
1838 async_data->cmd_out_len,
1839 devx_query_callback, &async_data->cb_work);
1840
1841 if (err)
1842 goto free_async;
1843
1844 return 0;
1845
1846free_async:
1847 kvfree(async_data);
1848sub_bytes:
1849 atomic_sub(cmd_out_len, &ev_file->ev_queue.bytes_in_use);
1850 return err;
1851}
1852
1853static void
1854subscribe_event_xa_dealloc(struct mlx5_devx_event_table *devx_event_table,
1855 u32 key_level1,
1856 bool is_level2,
1857 u32 key_level2)
1858{
1859 struct devx_event *event;
1860 struct devx_obj_event *xa_val_level2;
1861
1862 /* Level 1 is valid for future use, no need to free */
1863 if (!is_level2)
1864 return;
1865
1866 event = xa_load(&devx_event_table->event_xa, key_level1);
1867 WARN_ON(!event);
1868
1869 xa_val_level2 = xa_load(&event->object_ids,
1870 key_level2);
1871 if (list_empty(&xa_val_level2->obj_sub_list)) {
1872 xa_erase(&event->object_ids,
1873 key_level2);
1874 kfree_rcu(xa_val_level2, rcu);
1875 }
1876}
1877
1878static int
1879subscribe_event_xa_alloc(struct mlx5_devx_event_table *devx_event_table,
1880 u32 key_level1,
1881 bool is_level2,
1882 u32 key_level2)
1883{
1884 struct devx_obj_event *obj_event;
1885 struct devx_event *event;
1886 int err;
1887
1888 event = xa_load(&devx_event_table->event_xa, key_level1);
1889 if (!event) {
1890 event = kzalloc(sizeof(*event), GFP_KERNEL);
1891 if (!event)
1892 return -ENOMEM;
1893
1894 INIT_LIST_HEAD(&event->unaffiliated_list);
1895 xa_init(&event->object_ids);
1896
1897 err = xa_insert(&devx_event_table->event_xa,
1898 key_level1,
1899 event,
1900 GFP_KERNEL);
1901 if (err) {
1902 kfree(event);
1903 return err;
1904 }
1905 }
1906
1907 if (!is_level2)
1908 return 0;
1909
1910 obj_event = xa_load(&event->object_ids, key_level2);
1911 if (!obj_event) {
1912 obj_event = kzalloc(sizeof(*obj_event), GFP_KERNEL);
1913 if (!obj_event)
1914 /* Level1 is valid for future use, no need to free */
1915 return -ENOMEM;
1916
1917 err = xa_insert(&event->object_ids,
1918 key_level2,
1919 obj_event,
1920 GFP_KERNEL);
1921 if (err) {
1922 kfree(obj_event);
1923 return err;
1924 }
1925 INIT_LIST_HEAD(&obj_event->obj_sub_list);
1926 }
1927
1928 return 0;
1929}
1930
1931static bool is_valid_events_legacy(int num_events, u16 *event_type_num_list,
1932 struct devx_obj *obj)
1933{
1934 int i;
1935
1936 for (i = 0; i < num_events; i++) {
1937 if (obj) {
1938 if (!is_legacy_obj_event_num(event_type_num_list[i]))
1939 return false;
1940 } else if (!is_legacy_unaffiliated_event_num(
1941 event_type_num_list[i])) {
1942 return false;
1943 }
1944 }
1945
1946 return true;
1947}
1948
1949#define MAX_SUPP_EVENT_NUM 255
1950static bool is_valid_events(struct mlx5_core_dev *dev,
1951 int num_events, u16 *event_type_num_list,
1952 struct devx_obj *obj)
1953{
1954 __be64 *aff_events;
1955 __be64 *unaff_events;
1956 int mask_entry;
1957 int mask_bit;
1958 int i;
1959
1960 if (MLX5_CAP_GEN(dev, event_cap)) {
1961 aff_events = MLX5_CAP_DEV_EVENT(dev,
1962 user_affiliated_events);
1963 unaff_events = MLX5_CAP_DEV_EVENT(dev,
1964 user_unaffiliated_events);
1965 } else {
1966 return is_valid_events_legacy(num_events, event_type_num_list,
1967 obj);
1968 }
1969
1970 for (i = 0; i < num_events; i++) {
1971 if (event_type_num_list[i] > MAX_SUPP_EVENT_NUM)
1972 return false;
1973
1974 mask_entry = event_type_num_list[i] / 64;
1975 mask_bit = event_type_num_list[i] % 64;
1976
1977 if (obj) {
1978 /* CQ completion */
1979 if (event_type_num_list[i] == 0)
1980 continue;
1981
1982 if (!(be64_to_cpu(aff_events[mask_entry]) &
1983 (1ull << mask_bit)))
1984 return false;
1985
1986 continue;
1987 }
1988
1989 if (!(be64_to_cpu(unaff_events[mask_entry]) &
1990 (1ull << mask_bit)))
1991 return false;
1992 }
1993
1994 return true;
1995}
1996
1997#define MAX_NUM_EVENTS 16
1998static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT)(
1999 struct uverbs_attr_bundle *attrs)
2000{
2001 struct ib_uobject *devx_uobj = uverbs_attr_get_uobject(
2002 attrs,
2003 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_OBJ_HANDLE);
2004 struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
2005 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
2006 struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
2007 struct ib_uobject *fd_uobj;
2008 struct devx_obj *obj = NULL;
2009 struct devx_async_event_file *ev_file;
2010 struct mlx5_devx_event_table *devx_event_table = &dev->devx_event_table;
2011 u16 *event_type_num_list;
2012 struct devx_event_subscription *event_sub, *tmp_sub;
2013 struct list_head sub_list;
2014 int redirect_fd;
2015 bool use_eventfd = false;
2016 int num_events;
2017 u16 obj_type = 0;
2018 u64 cookie = 0;
2019 u32 obj_id = 0;
2020 int err;
2021 int i;
2022
2023 if (!c->devx_uid)
2024 return -EINVAL;
2025
2026 if (!IS_ERR(devx_uobj)) {
2027 obj = (struct devx_obj *)devx_uobj->object;
2028 if (obj)
2029 obj_id = get_dec_obj_id(obj->obj_id);
2030 }
2031
2032 fd_uobj = uverbs_attr_get_uobject(attrs,
2033 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_HANDLE);
2034 if (IS_ERR(fd_uobj))
2035 return PTR_ERR(fd_uobj);
2036
2037 ev_file = container_of(fd_uobj, struct devx_async_event_file,
2038 uobj);
2039
2040 if (uverbs_attr_is_valid(attrs,
2041 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_NUM)) {
2042 err = uverbs_copy_from(&redirect_fd, attrs,
2043 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_NUM);
2044 if (err)
2045 return err;
2046
2047 use_eventfd = true;
2048 }
2049
2050 if (uverbs_attr_is_valid(attrs,
2051 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_COOKIE)) {
2052 if (use_eventfd)
2053 return -EINVAL;
2054
2055 err = uverbs_copy_from(&cookie, attrs,
2056 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_COOKIE);
2057 if (err)
2058 return err;
2059 }
2060
2061 num_events = uverbs_attr_ptr_get_array_size(
2062 attrs, MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_TYPE_NUM_LIST,
2063 sizeof(u16));
2064
2065 if (num_events < 0)
2066 return num_events;
2067
2068 if (num_events > MAX_NUM_EVENTS)
2069 return -EINVAL;
2070
2071 event_type_num_list = uverbs_attr_get_alloced_ptr(attrs,
2072 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_TYPE_NUM_LIST);
2073
2074 if (!is_valid_events(dev->mdev, num_events, event_type_num_list, obj))
2075 return -EINVAL;
2076
2077 INIT_LIST_HEAD(&sub_list);
2078
2079 /* Protect from concurrent subscriptions to same XA entries to allow
2080 * both to succeed
2081 */
2082 mutex_lock(&devx_event_table->event_xa_lock);
2083 for (i = 0; i < num_events; i++) {
2084 u32 key_level1;
2085
2086 if (obj)
2087 obj_type = get_dec_obj_type(obj,
2088 event_type_num_list[i]);
2089 key_level1 = event_type_num_list[i] | obj_type << 16;
2090
2091 err = subscribe_event_xa_alloc(devx_event_table,
2092 key_level1,
2093 obj,
2094 obj_id);
2095 if (err)
2096 goto err;
2097
2098 event_sub = kzalloc(sizeof(*event_sub), GFP_KERNEL);
2099 if (!event_sub) {
2100 err = -ENOMEM;
2101 goto err;
2102 }
2103
2104 list_add_tail(&event_sub->event_list, &sub_list);
2105 uverbs_uobject_get(&ev_file->uobj);
2106 if (use_eventfd) {
2107 event_sub->eventfd =
2108 eventfd_ctx_fdget(redirect_fd);
2109
2110 if (IS_ERR(event_sub->eventfd)) {
2111 err = PTR_ERR(event_sub->eventfd);
2112 event_sub->eventfd = NULL;
2113 goto err;
2114 }
2115 }
2116
2117 event_sub->cookie = cookie;
2118 event_sub->ev_file = ev_file;
2119 /* May be needed upon cleanup the devx object/subscription */
2120 event_sub->xa_key_level1 = key_level1;
2121 event_sub->xa_key_level2 = obj_id;
2122 INIT_LIST_HEAD(&event_sub->obj_list);
2123 }
2124
2125 /* Once all the allocations and the XA data insertions were done we
2126 * can go ahead and add all the subscriptions to the relevant lists
2127 * without concern of a failure.
2128 */
2129 list_for_each_entry_safe(event_sub, tmp_sub, &sub_list, event_list) {
2130 struct devx_event *event;
2131 struct devx_obj_event *obj_event;
2132
2133 list_del_init(&event_sub->event_list);
2134
2135 spin_lock_irq(&ev_file->lock);
2136 list_add_tail_rcu(&event_sub->file_list,
2137 &ev_file->subscribed_events_list);
2138 spin_unlock_irq(&ev_file->lock);
2139
2140 event = xa_load(&devx_event_table->event_xa,
2141 event_sub->xa_key_level1);
2142 WARN_ON(!event);
2143
2144 if (!obj) {
2145 list_add_tail_rcu(&event_sub->xa_list,
2146 &event->unaffiliated_list);
2147 continue;
2148 }
2149
2150 obj_event = xa_load(&event->object_ids, obj_id);
2151 WARN_ON(!obj_event);
2152 list_add_tail_rcu(&event_sub->xa_list,
2153 &obj_event->obj_sub_list);
2154 list_add_tail_rcu(&event_sub->obj_list,
2155 &obj->event_sub);
2156 }
2157
2158 mutex_unlock(&devx_event_table->event_xa_lock);
2159 return 0;
2160
2161err:
2162 list_for_each_entry_safe(event_sub, tmp_sub, &sub_list, event_list) {
2163 list_del(&event_sub->event_list);
2164
2165 subscribe_event_xa_dealloc(devx_event_table,
2166 event_sub->xa_key_level1,
2167 obj,
2168 obj_id);
2169
2170 if (event_sub->eventfd)
2171 eventfd_ctx_put(event_sub->eventfd);
2172 uverbs_uobject_put(&event_sub->ev_file->uobj);
2173 kfree(event_sub);
2174 }
2175
2176 mutex_unlock(&devx_event_table->event_xa_lock);
2177 return err;
2178}
2179
2180static int devx_umem_get(struct mlx5_ib_dev *dev, struct ib_ucontext *ucontext,
2181 struct uverbs_attr_bundle *attrs,
2182 struct devx_umem *obj, u32 access_flags)
2183{
2184 u64 addr;
2185 size_t size;
2186 int err;
2187
2188 if (uverbs_copy_from(&addr, attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_ADDR) ||
2189 uverbs_copy_from(&size, attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_LEN))
2190 return -EFAULT;
2191
2192 err = ib_check_mr_access(&dev->ib_dev, access_flags);
2193 if (err)
2194 return err;
2195
2196 if (uverbs_attr_is_valid(attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_DMABUF_FD)) {
2197 struct ib_umem_dmabuf *umem_dmabuf;
2198 int dmabuf_fd;
2199
2200 err = uverbs_get_raw_fd(&dmabuf_fd, attrs,
2201 MLX5_IB_ATTR_DEVX_UMEM_REG_DMABUF_FD);
2202 if (err)
2203 return -EFAULT;
2204
2205 umem_dmabuf = ib_umem_dmabuf_get_pinned(
2206 &dev->ib_dev, addr, size, dmabuf_fd, access_flags);
2207 if (IS_ERR(umem_dmabuf))
2208 return PTR_ERR(umem_dmabuf);
2209 obj->umem = &umem_dmabuf->umem;
2210 } else {
2211 obj->umem = ib_umem_get(&dev->ib_dev, addr, size, access_flags);
2212 if (IS_ERR(obj->umem))
2213 return PTR_ERR(obj->umem);
2214 }
2215 return 0;
2216}
2217
2218static unsigned int devx_umem_find_best_pgsize(struct ib_umem *umem,
2219 unsigned long pgsz_bitmap)
2220{
2221 unsigned long page_size;
2222
2223 /* Don't bother checking larger page sizes as offset must be zero and
2224 * total DEVX umem length must be equal to total umem length.
2225 */
2226 pgsz_bitmap &= GENMASK_ULL(max_t(u64, order_base_2(umem->length),
2227 PAGE_SHIFT),
2228 MLX5_ADAPTER_PAGE_SHIFT);
2229 if (!pgsz_bitmap)
2230 return 0;
2231
2232 page_size = ib_umem_find_best_pgoff(umem, pgsz_bitmap, U64_MAX);
2233 if (!page_size)
2234 return 0;
2235
2236 /* If the page_size is less than the CPU page size then we can use the
2237 * offset and create a umem which is a subset of the page list.
2238 * For larger page sizes we can't be sure the DMA list reflects the
2239 * VA so we must ensure that the umem extent is exactly equal to the
2240 * page list. Reduce the page size until one of these cases is true.
2241 */
2242 while ((ib_umem_dma_offset(umem, page_size) != 0 ||
2243 (umem->length % page_size) != 0) &&
2244 page_size > PAGE_SIZE)
2245 page_size /= 2;
2246
2247 return page_size;
2248}
2249
2250static int devx_umem_reg_cmd_alloc(struct mlx5_ib_dev *dev,
2251 struct uverbs_attr_bundle *attrs,
2252 struct devx_umem *obj,
2253 struct devx_umem_reg_cmd *cmd,
2254 int access)
2255{
2256 unsigned long pgsz_bitmap;
2257 unsigned int page_size;
2258 __be64 *mtt;
2259 void *umem;
2260 int ret;
2261
2262 /*
2263 * If the user does not pass in pgsz_bitmap then the user promises not
2264 * to use umem_offset!=0 in any commands that allocate on top of the
2265 * umem.
2266 *
2267 * If the user wants to use a umem_offset then it must pass in
2268 * pgsz_bitmap which guides the maximum page size and thus maximum
2269 * object alignment inside the umem. See the PRM.
2270 *
2271 * Users are not allowed to use IOVA here, mkeys are not supported on
2272 * umem.
2273 */
2274 ret = uverbs_get_const_default(&pgsz_bitmap, attrs,
2275 MLX5_IB_ATTR_DEVX_UMEM_REG_PGSZ_BITMAP,
2276 GENMASK_ULL(63,
2277 min(PAGE_SHIFT, MLX5_ADAPTER_PAGE_SHIFT)));
2278 if (ret)
2279 return ret;
2280
2281 page_size = devx_umem_find_best_pgsize(obj->umem, pgsz_bitmap);
2282 if (!page_size)
2283 return -EINVAL;
2284
2285 cmd->inlen = MLX5_ST_SZ_BYTES(create_umem_in) +
2286 (MLX5_ST_SZ_BYTES(mtt) *
2287 ib_umem_num_dma_blocks(obj->umem, page_size));
2288 cmd->in = uverbs_zalloc(attrs, cmd->inlen);
2289 if (IS_ERR(cmd->in))
2290 return PTR_ERR(cmd->in);
2291
2292 umem = MLX5_ADDR_OF(create_umem_in, cmd->in, umem);
2293 mtt = (__be64 *)MLX5_ADDR_OF(umem, umem, mtt);
2294
2295 MLX5_SET(create_umem_in, cmd->in, opcode, MLX5_CMD_OP_CREATE_UMEM);
2296 MLX5_SET64(umem, umem, num_of_mtt,
2297 ib_umem_num_dma_blocks(obj->umem, page_size));
2298 MLX5_SET(umem, umem, log_page_size,
2299 order_base_2(page_size) - MLX5_ADAPTER_PAGE_SHIFT);
2300 MLX5_SET(umem, umem, page_offset,
2301 ib_umem_dma_offset(obj->umem, page_size));
2302
2303 if (mlx5_umem_needs_ats(dev, obj->umem, access))
2304 MLX5_SET(umem, umem, ats, 1);
2305
2306 mlx5_ib_populate_pas(obj->umem, page_size, mtt,
2307 (obj->umem->writable ? MLX5_IB_MTT_WRITE : 0) |
2308 MLX5_IB_MTT_READ);
2309 return 0;
2310}
2311
2312static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_UMEM_REG)(
2313 struct uverbs_attr_bundle *attrs)
2314{
2315 struct devx_umem_reg_cmd cmd;
2316 struct devx_umem *obj;
2317 struct ib_uobject *uobj = uverbs_attr_get_uobject(
2318 attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE);
2319 u32 obj_id;
2320 struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
2321 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
2322 struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
2323 int access_flags;
2324 int err;
2325
2326 if (!c->devx_uid)
2327 return -EINVAL;
2328
2329 err = uverbs_get_flags32(&access_flags, attrs,
2330 MLX5_IB_ATTR_DEVX_UMEM_REG_ACCESS,
2331 IB_ACCESS_LOCAL_WRITE |
2332 IB_ACCESS_REMOTE_WRITE |
2333 IB_ACCESS_REMOTE_READ |
2334 IB_ACCESS_RELAXED_ORDERING);
2335 if (err)
2336 return err;
2337
2338 obj = kzalloc(sizeof(struct devx_umem), GFP_KERNEL);
2339 if (!obj)
2340 return -ENOMEM;
2341
2342 err = devx_umem_get(dev, &c->ibucontext, attrs, obj, access_flags);
2343 if (err)
2344 goto err_obj_free;
2345
2346 err = devx_umem_reg_cmd_alloc(dev, attrs, obj, &cmd, access_flags);
2347 if (err)
2348 goto err_umem_release;
2349
2350 MLX5_SET(create_umem_in, cmd.in, uid, c->devx_uid);
2351 err = mlx5_cmd_exec(dev->mdev, cmd.in, cmd.inlen, cmd.out,
2352 sizeof(cmd.out));
2353 if (err)
2354 goto err_umem_release;
2355
2356 obj->mdev = dev->mdev;
2357 uobj->object = obj;
2358 devx_obj_build_destroy_cmd(cmd.in, cmd.out, obj->dinbox, &obj->dinlen, &obj_id);
2359 uverbs_finalize_uobj_create(attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE);
2360
2361 err = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_OUT_ID, &obj_id,
2362 sizeof(obj_id));
2363 return err;
2364
2365err_umem_release:
2366 ib_umem_release(obj->umem);
2367err_obj_free:
2368 kfree(obj);
2369 return err;
2370}
2371
2372static int devx_umem_cleanup(struct ib_uobject *uobject,
2373 enum rdma_remove_reason why,
2374 struct uverbs_attr_bundle *attrs)
2375{
2376 struct devx_umem *obj = uobject->object;
2377 u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
2378 int err;
2379
2380 err = mlx5_cmd_exec(obj->mdev, obj->dinbox, obj->dinlen, out, sizeof(out));
2381 if (err)
2382 return err;
2383
2384 ib_umem_release(obj->umem);
2385 kfree(obj);
2386 return 0;
2387}
2388
2389static bool is_unaffiliated_event(struct mlx5_core_dev *dev,
2390 unsigned long event_type)
2391{
2392 __be64 *unaff_events;
2393 int mask_entry;
2394 int mask_bit;
2395
2396 if (!MLX5_CAP_GEN(dev, event_cap))
2397 return is_legacy_unaffiliated_event_num(event_type);
2398
2399 unaff_events = MLX5_CAP_DEV_EVENT(dev,
2400 user_unaffiliated_events);
2401 WARN_ON(event_type > MAX_SUPP_EVENT_NUM);
2402
2403 mask_entry = event_type / 64;
2404 mask_bit = event_type % 64;
2405
2406 if (!(be64_to_cpu(unaff_events[mask_entry]) & (1ull << mask_bit)))
2407 return false;
2408
2409 return true;
2410}
2411
2412static u32 devx_get_obj_id_from_event(unsigned long event_type, void *data)
2413{
2414 struct mlx5_eqe *eqe = data;
2415 u32 obj_id = 0;
2416
2417 switch (event_type) {
2418 case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR:
2419 case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT:
2420 case MLX5_EVENT_TYPE_PATH_MIG:
2421 case MLX5_EVENT_TYPE_COMM_EST:
2422 case MLX5_EVENT_TYPE_SQ_DRAINED:
2423 case MLX5_EVENT_TYPE_SRQ_LAST_WQE:
2424 case MLX5_EVENT_TYPE_WQ_CATAS_ERROR:
2425 case MLX5_EVENT_TYPE_PATH_MIG_FAILED:
2426 case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
2427 case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR:
2428 obj_id = be32_to_cpu(eqe->data.qp_srq.qp_srq_n) & 0xffffff;
2429 break;
2430 case MLX5_EVENT_TYPE_XRQ_ERROR:
2431 obj_id = be32_to_cpu(eqe->data.xrq_err.type_xrqn) & 0xffffff;
2432 break;
2433 case MLX5_EVENT_TYPE_DCT_DRAINED:
2434 case MLX5_EVENT_TYPE_DCT_KEY_VIOLATION:
2435 obj_id = be32_to_cpu(eqe->data.dct.dctn) & 0xffffff;
2436 break;
2437 case MLX5_EVENT_TYPE_CQ_ERROR:
2438 obj_id = be32_to_cpu(eqe->data.cq_err.cqn) & 0xffffff;
2439 break;
2440 default:
2441 obj_id = MLX5_GET(affiliated_event_header, &eqe->data, obj_id);
2442 break;
2443 }
2444
2445 return obj_id;
2446}
2447
2448static int deliver_event(struct devx_event_subscription *event_sub,
2449 const void *data)
2450{
2451 struct devx_async_event_file *ev_file;
2452 struct devx_async_event_data *event_data;
2453 unsigned long flags;
2454
2455 ev_file = event_sub->ev_file;
2456
2457 if (ev_file->omit_data) {
2458 spin_lock_irqsave(&ev_file->lock, flags);
2459 if (!list_empty(&event_sub->event_list) ||
2460 ev_file->is_destroyed) {
2461 spin_unlock_irqrestore(&ev_file->lock, flags);
2462 return 0;
2463 }
2464
2465 list_add_tail(&event_sub->event_list, &ev_file->event_list);
2466 spin_unlock_irqrestore(&ev_file->lock, flags);
2467 wake_up_interruptible(&ev_file->poll_wait);
2468 return 0;
2469 }
2470
2471 event_data = kzalloc(sizeof(*event_data) + sizeof(struct mlx5_eqe),
2472 GFP_ATOMIC);
2473 if (!event_data) {
2474 spin_lock_irqsave(&ev_file->lock, flags);
2475 ev_file->is_overflow_err = 1;
2476 spin_unlock_irqrestore(&ev_file->lock, flags);
2477 return -ENOMEM;
2478 }
2479
2480 event_data->hdr.cookie = event_sub->cookie;
2481 memcpy(event_data->hdr.out_data, data, sizeof(struct mlx5_eqe));
2482
2483 spin_lock_irqsave(&ev_file->lock, flags);
2484 if (!ev_file->is_destroyed)
2485 list_add_tail(&event_data->list, &ev_file->event_list);
2486 else
2487 kfree(event_data);
2488 spin_unlock_irqrestore(&ev_file->lock, flags);
2489 wake_up_interruptible(&ev_file->poll_wait);
2490
2491 return 0;
2492}
2493
2494static void dispatch_event_fd(struct list_head *fd_list,
2495 const void *data)
2496{
2497 struct devx_event_subscription *item;
2498
2499 list_for_each_entry_rcu(item, fd_list, xa_list) {
2500 if (item->eventfd)
2501 eventfd_signal(item->eventfd);
2502 else
2503 deliver_event(item, data);
2504 }
2505}
2506
2507static int devx_event_notifier(struct notifier_block *nb,
2508 unsigned long event_type, void *data)
2509{
2510 struct mlx5_devx_event_table *table;
2511 struct mlx5_ib_dev *dev;
2512 struct devx_event *event;
2513 struct devx_obj_event *obj_event;
2514 u16 obj_type = 0;
2515 bool is_unaffiliated;
2516 u32 obj_id;
2517
2518 /* Explicit filtering to kernel events which may occur frequently */
2519 if (event_type == MLX5_EVENT_TYPE_CMD ||
2520 event_type == MLX5_EVENT_TYPE_PAGE_REQUEST)
2521 return NOTIFY_OK;
2522
2523 table = container_of(nb, struct mlx5_devx_event_table, devx_nb.nb);
2524 dev = container_of(table, struct mlx5_ib_dev, devx_event_table);
2525 is_unaffiliated = is_unaffiliated_event(dev->mdev, event_type);
2526
2527 if (!is_unaffiliated)
2528 obj_type = get_event_obj_type(event_type, data);
2529
2530 rcu_read_lock();
2531 event = xa_load(&table->event_xa, event_type | (obj_type << 16));
2532 if (!event) {
2533 rcu_read_unlock();
2534 return NOTIFY_DONE;
2535 }
2536
2537 if (is_unaffiliated) {
2538 dispatch_event_fd(&event->unaffiliated_list, data);
2539 rcu_read_unlock();
2540 return NOTIFY_OK;
2541 }
2542
2543 obj_id = devx_get_obj_id_from_event(event_type, data);
2544 obj_event = xa_load(&event->object_ids, obj_id);
2545 if (!obj_event) {
2546 rcu_read_unlock();
2547 return NOTIFY_DONE;
2548 }
2549
2550 dispatch_event_fd(&obj_event->obj_sub_list, data);
2551
2552 rcu_read_unlock();
2553 return NOTIFY_OK;
2554}
2555
2556int mlx5_ib_devx_init(struct mlx5_ib_dev *dev)
2557{
2558 struct mlx5_devx_event_table *table = &dev->devx_event_table;
2559 int uid;
2560
2561 uid = mlx5_ib_devx_create(dev, false);
2562 if (uid > 0) {
2563 dev->devx_whitelist_uid = uid;
2564 xa_init(&table->event_xa);
2565 mutex_init(&table->event_xa_lock);
2566 MLX5_NB_INIT(&table->devx_nb, devx_event_notifier, NOTIFY_ANY);
2567 mlx5_eq_notifier_register(dev->mdev, &table->devx_nb);
2568 }
2569
2570 return 0;
2571}
2572
2573void mlx5_ib_devx_cleanup(struct mlx5_ib_dev *dev)
2574{
2575 struct mlx5_devx_event_table *table = &dev->devx_event_table;
2576 struct devx_event_subscription *sub, *tmp;
2577 struct devx_event *event;
2578 void *entry;
2579 unsigned long id;
2580
2581 if (dev->devx_whitelist_uid) {
2582 mlx5_eq_notifier_unregister(dev->mdev, &table->devx_nb);
2583 mutex_lock(&dev->devx_event_table.event_xa_lock);
2584 xa_for_each(&table->event_xa, id, entry) {
2585 event = entry;
2586 list_for_each_entry_safe(
2587 sub, tmp, &event->unaffiliated_list, xa_list)
2588 devx_cleanup_subscription(dev, sub);
2589 kfree(entry);
2590 }
2591 mutex_unlock(&dev->devx_event_table.event_xa_lock);
2592 xa_destroy(&table->event_xa);
2593
2594 mlx5_ib_devx_destroy(dev, dev->devx_whitelist_uid);
2595 }
2596}
2597
2598static ssize_t devx_async_cmd_event_read(struct file *filp, char __user *buf,
2599 size_t count, loff_t *pos)
2600{
2601 struct devx_async_cmd_event_file *comp_ev_file = filp->private_data;
2602 struct devx_async_event_queue *ev_queue = &comp_ev_file->ev_queue;
2603 struct devx_async_data *event;
2604 int ret = 0;
2605 size_t eventsz;
2606
2607 spin_lock_irq(&ev_queue->lock);
2608
2609 while (list_empty(&ev_queue->event_list)) {
2610 spin_unlock_irq(&ev_queue->lock);
2611
2612 if (filp->f_flags & O_NONBLOCK)
2613 return -EAGAIN;
2614
2615 if (wait_event_interruptible(
2616 ev_queue->poll_wait,
2617 (!list_empty(&ev_queue->event_list) ||
2618 ev_queue->is_destroyed))) {
2619 return -ERESTARTSYS;
2620 }
2621
2622 spin_lock_irq(&ev_queue->lock);
2623 if (ev_queue->is_destroyed) {
2624 spin_unlock_irq(&ev_queue->lock);
2625 return -EIO;
2626 }
2627 }
2628
2629 event = list_entry(ev_queue->event_list.next,
2630 struct devx_async_data, list);
2631 eventsz = event->cmd_out_len +
2632 sizeof(struct mlx5_ib_uapi_devx_async_cmd_hdr);
2633
2634 if (eventsz > count) {
2635 spin_unlock_irq(&ev_queue->lock);
2636 return -ENOSPC;
2637 }
2638
2639 list_del(ev_queue->event_list.next);
2640 spin_unlock_irq(&ev_queue->lock);
2641
2642 if (copy_to_user(buf, &event->hdr, eventsz))
2643 ret = -EFAULT;
2644 else
2645 ret = eventsz;
2646
2647 atomic_sub(event->cmd_out_len, &ev_queue->bytes_in_use);
2648 kvfree(event);
2649 return ret;
2650}
2651
2652static __poll_t devx_async_cmd_event_poll(struct file *filp,
2653 struct poll_table_struct *wait)
2654{
2655 struct devx_async_cmd_event_file *comp_ev_file = filp->private_data;
2656 struct devx_async_event_queue *ev_queue = &comp_ev_file->ev_queue;
2657 __poll_t pollflags = 0;
2658
2659 poll_wait(filp, &ev_queue->poll_wait, wait);
2660
2661 spin_lock_irq(&ev_queue->lock);
2662 if (ev_queue->is_destroyed)
2663 pollflags = EPOLLIN | EPOLLRDNORM | EPOLLRDHUP;
2664 else if (!list_empty(&ev_queue->event_list))
2665 pollflags = EPOLLIN | EPOLLRDNORM;
2666 spin_unlock_irq(&ev_queue->lock);
2667
2668 return pollflags;
2669}
2670
2671static const struct file_operations devx_async_cmd_event_fops = {
2672 .owner = THIS_MODULE,
2673 .read = devx_async_cmd_event_read,
2674 .poll = devx_async_cmd_event_poll,
2675 .release = uverbs_uobject_fd_release,
2676 .llseek = no_llseek,
2677};
2678
2679static ssize_t devx_async_event_read(struct file *filp, char __user *buf,
2680 size_t count, loff_t *pos)
2681{
2682 struct devx_async_event_file *ev_file = filp->private_data;
2683 struct devx_event_subscription *event_sub;
2684 struct devx_async_event_data *event;
2685 int ret = 0;
2686 size_t eventsz;
2687 bool omit_data;
2688 void *event_data;
2689
2690 omit_data = ev_file->omit_data;
2691
2692 spin_lock_irq(&ev_file->lock);
2693
2694 if (ev_file->is_overflow_err) {
2695 ev_file->is_overflow_err = 0;
2696 spin_unlock_irq(&ev_file->lock);
2697 return -EOVERFLOW;
2698 }
2699
2700
2701 while (list_empty(&ev_file->event_list)) {
2702 spin_unlock_irq(&ev_file->lock);
2703
2704 if (filp->f_flags & O_NONBLOCK)
2705 return -EAGAIN;
2706
2707 if (wait_event_interruptible(ev_file->poll_wait,
2708 (!list_empty(&ev_file->event_list) ||
2709 ev_file->is_destroyed))) {
2710 return -ERESTARTSYS;
2711 }
2712
2713 spin_lock_irq(&ev_file->lock);
2714 if (ev_file->is_destroyed) {
2715 spin_unlock_irq(&ev_file->lock);
2716 return -EIO;
2717 }
2718 }
2719
2720 if (omit_data) {
2721 event_sub = list_first_entry(&ev_file->event_list,
2722 struct devx_event_subscription,
2723 event_list);
2724 eventsz = sizeof(event_sub->cookie);
2725 event_data = &event_sub->cookie;
2726 } else {
2727 event = list_first_entry(&ev_file->event_list,
2728 struct devx_async_event_data, list);
2729 eventsz = sizeof(struct mlx5_eqe) +
2730 sizeof(struct mlx5_ib_uapi_devx_async_event_hdr);
2731 event_data = &event->hdr;
2732 }
2733
2734 if (eventsz > count) {
2735 spin_unlock_irq(&ev_file->lock);
2736 return -EINVAL;
2737 }
2738
2739 if (omit_data)
2740 list_del_init(&event_sub->event_list);
2741 else
2742 list_del(&event->list);
2743
2744 spin_unlock_irq(&ev_file->lock);
2745
2746 if (copy_to_user(buf, event_data, eventsz))
2747 /* This points to an application issue, not a kernel concern */
2748 ret = -EFAULT;
2749 else
2750 ret = eventsz;
2751
2752 if (!omit_data)
2753 kfree(event);
2754 return ret;
2755}
2756
2757static __poll_t devx_async_event_poll(struct file *filp,
2758 struct poll_table_struct *wait)
2759{
2760 struct devx_async_event_file *ev_file = filp->private_data;
2761 __poll_t pollflags = 0;
2762
2763 poll_wait(filp, &ev_file->poll_wait, wait);
2764
2765 spin_lock_irq(&ev_file->lock);
2766 if (ev_file->is_destroyed)
2767 pollflags = EPOLLIN | EPOLLRDNORM | EPOLLRDHUP;
2768 else if (!list_empty(&ev_file->event_list))
2769 pollflags = EPOLLIN | EPOLLRDNORM;
2770 spin_unlock_irq(&ev_file->lock);
2771
2772 return pollflags;
2773}
2774
2775static void devx_free_subscription(struct rcu_head *rcu)
2776{
2777 struct devx_event_subscription *event_sub =
2778 container_of(rcu, struct devx_event_subscription, rcu);
2779
2780 if (event_sub->eventfd)
2781 eventfd_ctx_put(event_sub->eventfd);
2782 uverbs_uobject_put(&event_sub->ev_file->uobj);
2783 kfree(event_sub);
2784}
2785
2786static const struct file_operations devx_async_event_fops = {
2787 .owner = THIS_MODULE,
2788 .read = devx_async_event_read,
2789 .poll = devx_async_event_poll,
2790 .release = uverbs_uobject_fd_release,
2791 .llseek = no_llseek,
2792};
2793
2794static void devx_async_cmd_event_destroy_uobj(struct ib_uobject *uobj,
2795 enum rdma_remove_reason why)
2796{
2797 struct devx_async_cmd_event_file *comp_ev_file =
2798 container_of(uobj, struct devx_async_cmd_event_file,
2799 uobj);
2800 struct devx_async_event_queue *ev_queue = &comp_ev_file->ev_queue;
2801 struct devx_async_data *entry, *tmp;
2802
2803 spin_lock_irq(&ev_queue->lock);
2804 ev_queue->is_destroyed = 1;
2805 spin_unlock_irq(&ev_queue->lock);
2806 wake_up_interruptible(&ev_queue->poll_wait);
2807
2808 mlx5_cmd_cleanup_async_ctx(&comp_ev_file->async_ctx);
2809
2810 spin_lock_irq(&comp_ev_file->ev_queue.lock);
2811 list_for_each_entry_safe(entry, tmp,
2812 &comp_ev_file->ev_queue.event_list, list) {
2813 list_del(&entry->list);
2814 kvfree(entry);
2815 }
2816 spin_unlock_irq(&comp_ev_file->ev_queue.lock);
2817};
2818
2819static void devx_async_event_destroy_uobj(struct ib_uobject *uobj,
2820 enum rdma_remove_reason why)
2821{
2822 struct devx_async_event_file *ev_file =
2823 container_of(uobj, struct devx_async_event_file,
2824 uobj);
2825 struct devx_event_subscription *event_sub, *event_sub_tmp;
2826 struct mlx5_ib_dev *dev = ev_file->dev;
2827
2828 spin_lock_irq(&ev_file->lock);
2829 ev_file->is_destroyed = 1;
2830
2831 /* free the pending events allocation */
2832 if (ev_file->omit_data) {
2833 struct devx_event_subscription *event_sub, *tmp;
2834
2835 list_for_each_entry_safe(event_sub, tmp, &ev_file->event_list,
2836 event_list)
2837 list_del_init(&event_sub->event_list);
2838
2839 } else {
2840 struct devx_async_event_data *entry, *tmp;
2841
2842 list_for_each_entry_safe(entry, tmp, &ev_file->event_list,
2843 list) {
2844 list_del(&entry->list);
2845 kfree(entry);
2846 }
2847 }
2848
2849 spin_unlock_irq(&ev_file->lock);
2850 wake_up_interruptible(&ev_file->poll_wait);
2851
2852 mutex_lock(&dev->devx_event_table.event_xa_lock);
2853 /* delete the subscriptions which are related to this FD */
2854 list_for_each_entry_safe(event_sub, event_sub_tmp,
2855 &ev_file->subscribed_events_list, file_list) {
2856 devx_cleanup_subscription(dev, event_sub);
2857 list_del_rcu(&event_sub->file_list);
2858 /* subscription may not be used by the read API any more */
2859 call_rcu(&event_sub->rcu, devx_free_subscription);
2860 }
2861 mutex_unlock(&dev->devx_event_table.event_xa_lock);
2862
2863 put_device(&dev->ib_dev.dev);
2864};
2865
2866DECLARE_UVERBS_NAMED_METHOD(
2867 MLX5_IB_METHOD_DEVX_UMEM_REG,
2868 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE,
2869 MLX5_IB_OBJECT_DEVX_UMEM,
2870 UVERBS_ACCESS_NEW,
2871 UA_MANDATORY),
2872 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_ADDR,
2873 UVERBS_ATTR_TYPE(u64),
2874 UA_MANDATORY),
2875 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_LEN,
2876 UVERBS_ATTR_TYPE(u64),
2877 UA_MANDATORY),
2878 UVERBS_ATTR_RAW_FD(MLX5_IB_ATTR_DEVX_UMEM_REG_DMABUF_FD,
2879 UA_OPTIONAL),
2880 UVERBS_ATTR_FLAGS_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_ACCESS,
2881 enum ib_access_flags),
2882 UVERBS_ATTR_CONST_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_PGSZ_BITMAP,
2883 u64),
2884 UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_DEVX_UMEM_REG_OUT_ID,
2885 UVERBS_ATTR_TYPE(u32),
2886 UA_MANDATORY));
2887
2888DECLARE_UVERBS_NAMED_METHOD_DESTROY(
2889 MLX5_IB_METHOD_DEVX_UMEM_DEREG,
2890 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_UMEM_DEREG_HANDLE,
2891 MLX5_IB_OBJECT_DEVX_UMEM,
2892 UVERBS_ACCESS_DESTROY,
2893 UA_MANDATORY));
2894
2895DECLARE_UVERBS_NAMED_METHOD(
2896 MLX5_IB_METHOD_DEVX_QUERY_EQN,
2897 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_QUERY_EQN_USER_VEC,
2898 UVERBS_ATTR_TYPE(u32),
2899 UA_MANDATORY),
2900 UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_DEVX_QUERY_EQN_DEV_EQN,
2901 UVERBS_ATTR_TYPE(u32),
2902 UA_MANDATORY));
2903
2904DECLARE_UVERBS_NAMED_METHOD(
2905 MLX5_IB_METHOD_DEVX_QUERY_UAR,
2906 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_QUERY_UAR_USER_IDX,
2907 UVERBS_ATTR_TYPE(u32),
2908 UA_MANDATORY),
2909 UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_DEVX_QUERY_UAR_DEV_IDX,
2910 UVERBS_ATTR_TYPE(u32),
2911 UA_MANDATORY));
2912
2913DECLARE_UVERBS_NAMED_METHOD(
2914 MLX5_IB_METHOD_DEVX_OTHER,
2915 UVERBS_ATTR_PTR_IN(
2916 MLX5_IB_ATTR_DEVX_OTHER_CMD_IN,
2917 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2918 UA_MANDATORY,
2919 UA_ALLOC_AND_COPY),
2920 UVERBS_ATTR_PTR_OUT(
2921 MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT,
2922 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
2923 UA_MANDATORY));
2924
2925DECLARE_UVERBS_NAMED_METHOD(
2926 MLX5_IB_METHOD_DEVX_OBJ_CREATE,
2927 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_CREATE_HANDLE,
2928 MLX5_IB_OBJECT_DEVX_OBJ,
2929 UVERBS_ACCESS_NEW,
2930 UA_MANDATORY),
2931 UVERBS_ATTR_PTR_IN(
2932 MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN,
2933 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2934 UA_MANDATORY,
2935 UA_ALLOC_AND_COPY),
2936 UVERBS_ATTR_PTR_OUT(
2937 MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT,
2938 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
2939 UA_MANDATORY));
2940
2941DECLARE_UVERBS_NAMED_METHOD_DESTROY(
2942 MLX5_IB_METHOD_DEVX_OBJ_DESTROY,
2943 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_DESTROY_HANDLE,
2944 MLX5_IB_OBJECT_DEVX_OBJ,
2945 UVERBS_ACCESS_DESTROY,
2946 UA_MANDATORY));
2947
2948DECLARE_UVERBS_NAMED_METHOD(
2949 MLX5_IB_METHOD_DEVX_OBJ_MODIFY,
2950 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_MODIFY_HANDLE,
2951 UVERBS_IDR_ANY_OBJECT,
2952 UVERBS_ACCESS_READ,
2953 UA_MANDATORY),
2954 UVERBS_ATTR_PTR_IN(
2955 MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN,
2956 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2957 UA_MANDATORY,
2958 UA_ALLOC_AND_COPY),
2959 UVERBS_ATTR_PTR_OUT(
2960 MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT,
2961 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
2962 UA_MANDATORY));
2963
2964DECLARE_UVERBS_NAMED_METHOD(
2965 MLX5_IB_METHOD_DEVX_OBJ_QUERY,
2966 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_QUERY_HANDLE,
2967 UVERBS_IDR_ANY_OBJECT,
2968 UVERBS_ACCESS_READ,
2969 UA_MANDATORY),
2970 UVERBS_ATTR_PTR_IN(
2971 MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN,
2972 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2973 UA_MANDATORY,
2974 UA_ALLOC_AND_COPY),
2975 UVERBS_ATTR_PTR_OUT(
2976 MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT,
2977 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
2978 UA_MANDATORY));
2979
2980DECLARE_UVERBS_NAMED_METHOD(
2981 MLX5_IB_METHOD_DEVX_OBJ_ASYNC_QUERY,
2982 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_QUERY_HANDLE,
2983 UVERBS_IDR_ANY_OBJECT,
2984 UVERBS_ACCESS_READ,
2985 UA_MANDATORY),
2986 UVERBS_ATTR_PTR_IN(
2987 MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN,
2988 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2989 UA_MANDATORY,
2990 UA_ALLOC_AND_COPY),
2991 UVERBS_ATTR_CONST_IN(MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_OUT_LEN,
2992 u16, UA_MANDATORY),
2993 UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_FD,
2994 MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
2995 UVERBS_ACCESS_READ,
2996 UA_MANDATORY),
2997 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_WR_ID,
2998 UVERBS_ATTR_TYPE(u64),
2999 UA_MANDATORY));
3000
3001DECLARE_UVERBS_NAMED_METHOD(
3002 MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT,
3003 UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_HANDLE,
3004 MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
3005 UVERBS_ACCESS_READ,
3006 UA_MANDATORY),
3007 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_OBJ_HANDLE,
3008 MLX5_IB_OBJECT_DEVX_OBJ,
3009 UVERBS_ACCESS_READ,
3010 UA_OPTIONAL),
3011 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_TYPE_NUM_LIST,
3012 UVERBS_ATTR_MIN_SIZE(sizeof(u16)),
3013 UA_MANDATORY,
3014 UA_ALLOC_AND_COPY),
3015 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_COOKIE,
3016 UVERBS_ATTR_TYPE(u64),
3017 UA_OPTIONAL),
3018 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_NUM,
3019 UVERBS_ATTR_TYPE(u32),
3020 UA_OPTIONAL));
3021
3022DECLARE_UVERBS_GLOBAL_METHODS(MLX5_IB_OBJECT_DEVX,
3023 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OTHER),
3024 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_QUERY_UAR),
3025 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_QUERY_EQN),
3026 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT));
3027
3028DECLARE_UVERBS_NAMED_OBJECT(MLX5_IB_OBJECT_DEVX_OBJ,
3029 UVERBS_TYPE_ALLOC_IDR(devx_obj_cleanup),
3030 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_CREATE),
3031 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_DESTROY),
3032 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_MODIFY),
3033 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_QUERY),
3034 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_ASYNC_QUERY));
3035
3036DECLARE_UVERBS_NAMED_OBJECT(MLX5_IB_OBJECT_DEVX_UMEM,
3037 UVERBS_TYPE_ALLOC_IDR(devx_umem_cleanup),
3038 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_UMEM_REG),
3039 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_UMEM_DEREG));
3040
3041
3042DECLARE_UVERBS_NAMED_METHOD(
3043 MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC,
3044 UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_ASYNC_CMD_FD_ALLOC_HANDLE,
3045 MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
3046 UVERBS_ACCESS_NEW,
3047 UA_MANDATORY));
3048
3049DECLARE_UVERBS_NAMED_OBJECT(
3050 MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
3051 UVERBS_TYPE_ALLOC_FD(sizeof(struct devx_async_cmd_event_file),
3052 devx_async_cmd_event_destroy_uobj,
3053 &devx_async_cmd_event_fops, "[devx_async_cmd]",
3054 O_RDONLY),
3055 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC));
3056
3057DECLARE_UVERBS_NAMED_METHOD(
3058 MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC,
3059 UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_HANDLE,
3060 MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
3061 UVERBS_ACCESS_NEW,
3062 UA_MANDATORY),
3063 UVERBS_ATTR_FLAGS_IN(MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_FLAGS,
3064 enum mlx5_ib_uapi_devx_create_event_channel_flags,
3065 UA_MANDATORY));
3066
3067DECLARE_UVERBS_NAMED_OBJECT(
3068 MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
3069 UVERBS_TYPE_ALLOC_FD(sizeof(struct devx_async_event_file),
3070 devx_async_event_destroy_uobj,
3071 &devx_async_event_fops, "[devx_async_event]",
3072 O_RDONLY),
3073 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC));
3074
3075static bool devx_is_supported(struct ib_device *device)
3076{
3077 struct mlx5_ib_dev *dev = to_mdev(device);
3078
3079 return MLX5_CAP_GEN(dev->mdev, log_max_uctx);
3080}
3081
3082const struct uapi_definition mlx5_ib_devx_defs[] = {
3083 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
3084 MLX5_IB_OBJECT_DEVX,
3085 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
3086 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
3087 MLX5_IB_OBJECT_DEVX_OBJ,
3088 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
3089 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
3090 MLX5_IB_OBJECT_DEVX_UMEM,
3091 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
3092 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
3093 MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
3094 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
3095 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
3096 MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
3097 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
3098 {},
3099};
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
24static void dispatch_event_fd(struct list_head *fd_list, const void *data);
25
26enum 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
32struct 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
42struct 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 */
48struct 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 */
54struct devx_obj_event {
55 struct rcu_head rcu;
56 struct list_head obj_sub_list;
57};
58
59struct 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
80struct 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
93struct devx_umem {
94 struct mlx5_core_dev *mdev;
95 struct ib_umem *umem;
96 u32 page_offset;
97 int page_shift;
98 int ncont;
99 u32 dinlen;
100 u32 dinbox[MLX5_ST_SZ_DW(general_obj_in_cmd_hdr)];
101};
102
103struct devx_umem_reg_cmd {
104 void *in;
105 u32 inlen;
106 u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
107};
108
109static struct mlx5_ib_ucontext *
110devx_ufile2uctx(const struct uverbs_attr_bundle *attrs)
111{
112 return to_mucontext(ib_uverbs_get_ucontext(attrs));
113}
114
115int mlx5_ib_devx_create(struct mlx5_ib_dev *dev, bool is_user)
116{
117 u32 in[MLX5_ST_SZ_DW(create_uctx_in)] = {0};
118 u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)] = {0};
119 void *uctx;
120 int err;
121 u16 uid;
122 u32 cap = 0;
123
124 /* 0 means not supported */
125 if (!MLX5_CAP_GEN(dev->mdev, log_max_uctx))
126 return -EINVAL;
127
128 uctx = MLX5_ADDR_OF(create_uctx_in, in, uctx);
129 if (is_user && capable(CAP_NET_RAW) &&
130 (MLX5_CAP_GEN(dev->mdev, uctx_cap) & MLX5_UCTX_CAP_RAW_TX))
131 cap |= MLX5_UCTX_CAP_RAW_TX;
132 if (is_user && capable(CAP_SYS_RAWIO) &&
133 (MLX5_CAP_GEN(dev->mdev, uctx_cap) &
134 MLX5_UCTX_CAP_INTERNAL_DEV_RES))
135 cap |= MLX5_UCTX_CAP_INTERNAL_DEV_RES;
136
137 MLX5_SET(create_uctx_in, in, opcode, MLX5_CMD_OP_CREATE_UCTX);
138 MLX5_SET(uctx, uctx, cap, cap);
139
140 err = mlx5_cmd_exec(dev->mdev, in, sizeof(in), out, sizeof(out));
141 if (err)
142 return err;
143
144 uid = MLX5_GET(general_obj_out_cmd_hdr, out, obj_id);
145 return uid;
146}
147
148void mlx5_ib_devx_destroy(struct mlx5_ib_dev *dev, u16 uid)
149{
150 u32 in[MLX5_ST_SZ_DW(destroy_uctx_in)] = {0};
151 u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)] = {0};
152
153 MLX5_SET(destroy_uctx_in, in, opcode, MLX5_CMD_OP_DESTROY_UCTX);
154 MLX5_SET(destroy_uctx_in, in, uid, uid);
155
156 mlx5_cmd_exec(dev->mdev, in, sizeof(in), out, sizeof(out));
157}
158
159static bool is_legacy_unaffiliated_event_num(u16 event_num)
160{
161 switch (event_num) {
162 case MLX5_EVENT_TYPE_PORT_CHANGE:
163 return true;
164 default:
165 return false;
166 }
167}
168
169static bool is_legacy_obj_event_num(u16 event_num)
170{
171 switch (event_num) {
172 case MLX5_EVENT_TYPE_PATH_MIG:
173 case MLX5_EVENT_TYPE_COMM_EST:
174 case MLX5_EVENT_TYPE_SQ_DRAINED:
175 case MLX5_EVENT_TYPE_SRQ_LAST_WQE:
176 case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT:
177 case MLX5_EVENT_TYPE_CQ_ERROR:
178 case MLX5_EVENT_TYPE_WQ_CATAS_ERROR:
179 case MLX5_EVENT_TYPE_PATH_MIG_FAILED:
180 case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
181 case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR:
182 case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR:
183 case MLX5_EVENT_TYPE_DCT_DRAINED:
184 case MLX5_EVENT_TYPE_COMP:
185 case MLX5_EVENT_TYPE_DCT_KEY_VIOLATION:
186 case MLX5_EVENT_TYPE_XRQ_ERROR:
187 return true;
188 default:
189 return false;
190 }
191}
192
193static u16 get_legacy_obj_type(u16 opcode)
194{
195 switch (opcode) {
196 case MLX5_CMD_OP_CREATE_RQ:
197 return MLX5_EVENT_QUEUE_TYPE_RQ;
198 case MLX5_CMD_OP_CREATE_QP:
199 return MLX5_EVENT_QUEUE_TYPE_QP;
200 case MLX5_CMD_OP_CREATE_SQ:
201 return MLX5_EVENT_QUEUE_TYPE_SQ;
202 case MLX5_CMD_OP_CREATE_DCT:
203 return MLX5_EVENT_QUEUE_TYPE_DCT;
204 default:
205 return 0;
206 }
207}
208
209static u16 get_dec_obj_type(struct devx_obj *obj, u16 event_num)
210{
211 u16 opcode;
212
213 opcode = (obj->obj_id >> 32) & 0xffff;
214
215 if (is_legacy_obj_event_num(event_num))
216 return get_legacy_obj_type(opcode);
217
218 switch (opcode) {
219 case MLX5_CMD_OP_CREATE_GENERAL_OBJECT:
220 return (obj->obj_id >> 48);
221 case MLX5_CMD_OP_CREATE_RQ:
222 return MLX5_OBJ_TYPE_RQ;
223 case MLX5_CMD_OP_CREATE_QP:
224 return MLX5_OBJ_TYPE_QP;
225 case MLX5_CMD_OP_CREATE_SQ:
226 return MLX5_OBJ_TYPE_SQ;
227 case MLX5_CMD_OP_CREATE_DCT:
228 return MLX5_OBJ_TYPE_DCT;
229 case MLX5_CMD_OP_CREATE_TIR:
230 return MLX5_OBJ_TYPE_TIR;
231 case MLX5_CMD_OP_CREATE_TIS:
232 return MLX5_OBJ_TYPE_TIS;
233 case MLX5_CMD_OP_CREATE_PSV:
234 return MLX5_OBJ_TYPE_PSV;
235 case MLX5_OBJ_TYPE_MKEY:
236 return MLX5_OBJ_TYPE_MKEY;
237 case MLX5_CMD_OP_CREATE_RMP:
238 return MLX5_OBJ_TYPE_RMP;
239 case MLX5_CMD_OP_CREATE_XRC_SRQ:
240 return MLX5_OBJ_TYPE_XRC_SRQ;
241 case MLX5_CMD_OP_CREATE_XRQ:
242 return MLX5_OBJ_TYPE_XRQ;
243 case MLX5_CMD_OP_CREATE_RQT:
244 return MLX5_OBJ_TYPE_RQT;
245 case MLX5_CMD_OP_ALLOC_FLOW_COUNTER:
246 return MLX5_OBJ_TYPE_FLOW_COUNTER;
247 case MLX5_CMD_OP_CREATE_CQ:
248 return MLX5_OBJ_TYPE_CQ;
249 default:
250 return 0;
251 }
252}
253
254static u16 get_event_obj_type(unsigned long event_type, struct mlx5_eqe *eqe)
255{
256 switch (event_type) {
257 case MLX5_EVENT_TYPE_WQ_CATAS_ERROR:
258 case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR:
259 case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
260 case MLX5_EVENT_TYPE_SRQ_LAST_WQE:
261 case MLX5_EVENT_TYPE_PATH_MIG:
262 case MLX5_EVENT_TYPE_PATH_MIG_FAILED:
263 case MLX5_EVENT_TYPE_COMM_EST:
264 case MLX5_EVENT_TYPE_SQ_DRAINED:
265 case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT:
266 case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR:
267 return eqe->data.qp_srq.type;
268 case MLX5_EVENT_TYPE_CQ_ERROR:
269 case MLX5_EVENT_TYPE_XRQ_ERROR:
270 return 0;
271 case MLX5_EVENT_TYPE_DCT_DRAINED:
272 case MLX5_EVENT_TYPE_DCT_KEY_VIOLATION:
273 return MLX5_EVENT_QUEUE_TYPE_DCT;
274 default:
275 return MLX5_GET(affiliated_event_header, &eqe->data, obj_type);
276 }
277}
278
279static u32 get_dec_obj_id(u64 obj_id)
280{
281 return (obj_id & 0xffffffff);
282}
283
284/*
285 * As the obj_id in the firmware is not globally unique the object type
286 * must be considered upon checking for a valid object id.
287 * For that the opcode of the creator command is encoded as part of the obj_id.
288 */
289static u64 get_enc_obj_id(u32 opcode, u32 obj_id)
290{
291 return ((u64)opcode << 32) | obj_id;
292}
293
294static u64 devx_get_obj_id(const void *in)
295{
296 u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
297 u64 obj_id;
298
299 switch (opcode) {
300 case MLX5_CMD_OP_MODIFY_GENERAL_OBJECT:
301 case MLX5_CMD_OP_QUERY_GENERAL_OBJECT:
302 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_GENERAL_OBJECT |
303 MLX5_GET(general_obj_in_cmd_hdr, in,
304 obj_type) << 16,
305 MLX5_GET(general_obj_in_cmd_hdr, in,
306 obj_id));
307 break;
308 case MLX5_CMD_OP_QUERY_MKEY:
309 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_MKEY,
310 MLX5_GET(query_mkey_in, in,
311 mkey_index));
312 break;
313 case MLX5_CMD_OP_QUERY_CQ:
314 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_CQ,
315 MLX5_GET(query_cq_in, in, cqn));
316 break;
317 case MLX5_CMD_OP_MODIFY_CQ:
318 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_CQ,
319 MLX5_GET(modify_cq_in, in, cqn));
320 break;
321 case MLX5_CMD_OP_QUERY_SQ:
322 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SQ,
323 MLX5_GET(query_sq_in, in, sqn));
324 break;
325 case MLX5_CMD_OP_MODIFY_SQ:
326 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SQ,
327 MLX5_GET(modify_sq_in, in, sqn));
328 break;
329 case MLX5_CMD_OP_QUERY_RQ:
330 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ,
331 MLX5_GET(query_rq_in, in, rqn));
332 break;
333 case MLX5_CMD_OP_MODIFY_RQ:
334 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ,
335 MLX5_GET(modify_rq_in, in, rqn));
336 break;
337 case MLX5_CMD_OP_QUERY_RMP:
338 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RMP,
339 MLX5_GET(query_rmp_in, in, rmpn));
340 break;
341 case MLX5_CMD_OP_MODIFY_RMP:
342 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RMP,
343 MLX5_GET(modify_rmp_in, in, rmpn));
344 break;
345 case MLX5_CMD_OP_QUERY_RQT:
346 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQT,
347 MLX5_GET(query_rqt_in, in, rqtn));
348 break;
349 case MLX5_CMD_OP_MODIFY_RQT:
350 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQT,
351 MLX5_GET(modify_rqt_in, in, rqtn));
352 break;
353 case MLX5_CMD_OP_QUERY_TIR:
354 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_TIR,
355 MLX5_GET(query_tir_in, in, tirn));
356 break;
357 case MLX5_CMD_OP_MODIFY_TIR:
358 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_TIR,
359 MLX5_GET(modify_tir_in, in, tirn));
360 break;
361 case MLX5_CMD_OP_QUERY_TIS:
362 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_TIS,
363 MLX5_GET(query_tis_in, in, tisn));
364 break;
365 case MLX5_CMD_OP_MODIFY_TIS:
366 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_TIS,
367 MLX5_GET(modify_tis_in, in, tisn));
368 break;
369 case MLX5_CMD_OP_QUERY_FLOW_TABLE:
370 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_FLOW_TABLE,
371 MLX5_GET(query_flow_table_in, in,
372 table_id));
373 break;
374 case MLX5_CMD_OP_MODIFY_FLOW_TABLE:
375 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_FLOW_TABLE,
376 MLX5_GET(modify_flow_table_in, in,
377 table_id));
378 break;
379 case MLX5_CMD_OP_QUERY_FLOW_GROUP:
380 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_FLOW_GROUP,
381 MLX5_GET(query_flow_group_in, in,
382 group_id));
383 break;
384 case MLX5_CMD_OP_QUERY_FLOW_TABLE_ENTRY:
385 obj_id = get_enc_obj_id(MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY,
386 MLX5_GET(query_fte_in, in,
387 flow_index));
388 break;
389 case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
390 obj_id = get_enc_obj_id(MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY,
391 MLX5_GET(set_fte_in, in, flow_index));
392 break;
393 case MLX5_CMD_OP_QUERY_Q_COUNTER:
394 obj_id = get_enc_obj_id(MLX5_CMD_OP_ALLOC_Q_COUNTER,
395 MLX5_GET(query_q_counter_in, in,
396 counter_set_id));
397 break;
398 case MLX5_CMD_OP_QUERY_FLOW_COUNTER:
399 obj_id = get_enc_obj_id(MLX5_CMD_OP_ALLOC_FLOW_COUNTER,
400 MLX5_GET(query_flow_counter_in, in,
401 flow_counter_id));
402 break;
403 case MLX5_CMD_OP_QUERY_MODIFY_HEADER_CONTEXT:
404 obj_id = get_enc_obj_id(MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT,
405 MLX5_GET(general_obj_in_cmd_hdr, in,
406 obj_id));
407 break;
408 case MLX5_CMD_OP_QUERY_SCHEDULING_ELEMENT:
409 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT,
410 MLX5_GET(query_scheduling_element_in,
411 in, scheduling_element_id));
412 break;
413 case MLX5_CMD_OP_MODIFY_SCHEDULING_ELEMENT:
414 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT,
415 MLX5_GET(modify_scheduling_element_in,
416 in, scheduling_element_id));
417 break;
418 case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
419 obj_id = get_enc_obj_id(MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT,
420 MLX5_GET(add_vxlan_udp_dport_in, in,
421 vxlan_udp_port));
422 break;
423 case MLX5_CMD_OP_QUERY_L2_TABLE_ENTRY:
424 obj_id = get_enc_obj_id(MLX5_CMD_OP_SET_L2_TABLE_ENTRY,
425 MLX5_GET(query_l2_table_entry_in, in,
426 table_index));
427 break;
428 case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
429 obj_id = get_enc_obj_id(MLX5_CMD_OP_SET_L2_TABLE_ENTRY,
430 MLX5_GET(set_l2_table_entry_in, in,
431 table_index));
432 break;
433 case MLX5_CMD_OP_QUERY_QP:
434 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
435 MLX5_GET(query_qp_in, in, qpn));
436 break;
437 case MLX5_CMD_OP_RST2INIT_QP:
438 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
439 MLX5_GET(rst2init_qp_in, in, qpn));
440 break;
441 case MLX5_CMD_OP_INIT2INIT_QP:
442 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
443 MLX5_GET(init2init_qp_in, in, qpn));
444 break;
445 case MLX5_CMD_OP_INIT2RTR_QP:
446 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
447 MLX5_GET(init2rtr_qp_in, in, qpn));
448 break;
449 case MLX5_CMD_OP_RTR2RTS_QP:
450 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
451 MLX5_GET(rtr2rts_qp_in, in, qpn));
452 break;
453 case MLX5_CMD_OP_RTS2RTS_QP:
454 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
455 MLX5_GET(rts2rts_qp_in, in, qpn));
456 break;
457 case MLX5_CMD_OP_SQERR2RTS_QP:
458 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
459 MLX5_GET(sqerr2rts_qp_in, in, qpn));
460 break;
461 case MLX5_CMD_OP_2ERR_QP:
462 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
463 MLX5_GET(qp_2err_in, in, qpn));
464 break;
465 case MLX5_CMD_OP_2RST_QP:
466 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
467 MLX5_GET(qp_2rst_in, in, qpn));
468 break;
469 case MLX5_CMD_OP_QUERY_DCT:
470 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_DCT,
471 MLX5_GET(query_dct_in, in, dctn));
472 break;
473 case MLX5_CMD_OP_QUERY_XRQ:
474 case MLX5_CMD_OP_QUERY_XRQ_DC_PARAMS_ENTRY:
475 case MLX5_CMD_OP_QUERY_XRQ_ERROR_PARAMS:
476 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_XRQ,
477 MLX5_GET(query_xrq_in, in, xrqn));
478 break;
479 case MLX5_CMD_OP_QUERY_XRC_SRQ:
480 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_XRC_SRQ,
481 MLX5_GET(query_xrc_srq_in, in,
482 xrc_srqn));
483 break;
484 case MLX5_CMD_OP_ARM_XRC_SRQ:
485 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_XRC_SRQ,
486 MLX5_GET(arm_xrc_srq_in, in, xrc_srqn));
487 break;
488 case MLX5_CMD_OP_QUERY_SRQ:
489 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_SRQ,
490 MLX5_GET(query_srq_in, in, srqn));
491 break;
492 case MLX5_CMD_OP_ARM_RQ:
493 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ,
494 MLX5_GET(arm_rq_in, in, srq_number));
495 break;
496 case MLX5_CMD_OP_ARM_DCT_FOR_KEY_VIOLATION:
497 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_DCT,
498 MLX5_GET(drain_dct_in, in, dctn));
499 break;
500 case MLX5_CMD_OP_ARM_XRQ:
501 case MLX5_CMD_OP_SET_XRQ_DC_PARAMS_ENTRY:
502 case MLX5_CMD_OP_RELEASE_XRQ_ERROR:
503 case MLX5_CMD_OP_MODIFY_XRQ:
504 obj_id = get_enc_obj_id(MLX5_CMD_OP_CREATE_XRQ,
505 MLX5_GET(arm_xrq_in, in, xrqn));
506 break;
507 case MLX5_CMD_OP_QUERY_PACKET_REFORMAT_CONTEXT:
508 obj_id = get_enc_obj_id
509 (MLX5_CMD_OP_ALLOC_PACKET_REFORMAT_CONTEXT,
510 MLX5_GET(query_packet_reformat_context_in,
511 in, packet_reformat_id));
512 break;
513 default:
514 obj_id = 0;
515 }
516
517 return obj_id;
518}
519
520static bool devx_is_valid_obj_id(struct uverbs_attr_bundle *attrs,
521 struct ib_uobject *uobj, const void *in)
522{
523 struct mlx5_ib_dev *dev = mlx5_udata_to_mdev(&attrs->driver_udata);
524 u64 obj_id = devx_get_obj_id(in);
525
526 if (!obj_id)
527 return false;
528
529 switch (uobj_get_object_id(uobj)) {
530 case UVERBS_OBJECT_CQ:
531 return get_enc_obj_id(MLX5_CMD_OP_CREATE_CQ,
532 to_mcq(uobj->object)->mcq.cqn) ==
533 obj_id;
534
535 case UVERBS_OBJECT_SRQ:
536 {
537 struct mlx5_core_srq *srq = &(to_msrq(uobj->object)->msrq);
538 u16 opcode;
539
540 switch (srq->common.res) {
541 case MLX5_RES_XSRQ:
542 opcode = MLX5_CMD_OP_CREATE_XRC_SRQ;
543 break;
544 case MLX5_RES_XRQ:
545 opcode = MLX5_CMD_OP_CREATE_XRQ;
546 break;
547 default:
548 if (!dev->mdev->issi)
549 opcode = MLX5_CMD_OP_CREATE_SRQ;
550 else
551 opcode = MLX5_CMD_OP_CREATE_RMP;
552 }
553
554 return get_enc_obj_id(opcode,
555 to_msrq(uobj->object)->msrq.srqn) ==
556 obj_id;
557 }
558
559 case UVERBS_OBJECT_QP:
560 {
561 struct mlx5_ib_qp *qp = to_mqp(uobj->object);
562 enum ib_qp_type qp_type = qp->ibqp.qp_type;
563
564 if (qp_type == IB_QPT_RAW_PACKET ||
565 (qp->flags & IB_QP_CREATE_SOURCE_QPN)) {
566 struct mlx5_ib_raw_packet_qp *raw_packet_qp =
567 &qp->raw_packet_qp;
568 struct mlx5_ib_rq *rq = &raw_packet_qp->rq;
569 struct mlx5_ib_sq *sq = &raw_packet_qp->sq;
570
571 return (get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ,
572 rq->base.mqp.qpn) == obj_id ||
573 get_enc_obj_id(MLX5_CMD_OP_CREATE_SQ,
574 sq->base.mqp.qpn) == obj_id ||
575 get_enc_obj_id(MLX5_CMD_OP_CREATE_TIR,
576 rq->tirn) == obj_id ||
577 get_enc_obj_id(MLX5_CMD_OP_CREATE_TIS,
578 sq->tisn) == obj_id);
579 }
580
581 if (qp_type == MLX5_IB_QPT_DCT)
582 return get_enc_obj_id(MLX5_CMD_OP_CREATE_DCT,
583 qp->dct.mdct.mqp.qpn) == obj_id;
584
585 return get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
586 qp->ibqp.qp_num) == obj_id;
587 }
588
589 case UVERBS_OBJECT_WQ:
590 return get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ,
591 to_mrwq(uobj->object)->core_qp.qpn) ==
592 obj_id;
593
594 case UVERBS_OBJECT_RWQ_IND_TBL:
595 return get_enc_obj_id(MLX5_CMD_OP_CREATE_RQT,
596 to_mrwq_ind_table(uobj->object)->rqtn) ==
597 obj_id;
598
599 case MLX5_IB_OBJECT_DEVX_OBJ:
600 return ((struct devx_obj *)uobj->object)->obj_id == obj_id;
601
602 default:
603 return false;
604 }
605}
606
607static void devx_set_umem_valid(const void *in)
608{
609 u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
610
611 switch (opcode) {
612 case MLX5_CMD_OP_CREATE_MKEY:
613 MLX5_SET(create_mkey_in, in, mkey_umem_valid, 1);
614 break;
615 case MLX5_CMD_OP_CREATE_CQ:
616 {
617 void *cqc;
618
619 MLX5_SET(create_cq_in, in, cq_umem_valid, 1);
620 cqc = MLX5_ADDR_OF(create_cq_in, in, cq_context);
621 MLX5_SET(cqc, cqc, dbr_umem_valid, 1);
622 break;
623 }
624 case MLX5_CMD_OP_CREATE_QP:
625 {
626 void *qpc;
627
628 qpc = MLX5_ADDR_OF(create_qp_in, in, qpc);
629 MLX5_SET(qpc, qpc, dbr_umem_valid, 1);
630 MLX5_SET(create_qp_in, in, wq_umem_valid, 1);
631 break;
632 }
633
634 case MLX5_CMD_OP_CREATE_RQ:
635 {
636 void *rqc, *wq;
637
638 rqc = MLX5_ADDR_OF(create_rq_in, in, ctx);
639 wq = MLX5_ADDR_OF(rqc, rqc, wq);
640 MLX5_SET(wq, wq, dbr_umem_valid, 1);
641 MLX5_SET(wq, wq, wq_umem_valid, 1);
642 break;
643 }
644
645 case MLX5_CMD_OP_CREATE_SQ:
646 {
647 void *sqc, *wq;
648
649 sqc = MLX5_ADDR_OF(create_sq_in, in, ctx);
650 wq = MLX5_ADDR_OF(sqc, sqc, wq);
651 MLX5_SET(wq, wq, dbr_umem_valid, 1);
652 MLX5_SET(wq, wq, wq_umem_valid, 1);
653 break;
654 }
655
656 case MLX5_CMD_OP_MODIFY_CQ:
657 MLX5_SET(modify_cq_in, in, cq_umem_valid, 1);
658 break;
659
660 case MLX5_CMD_OP_CREATE_RMP:
661 {
662 void *rmpc, *wq;
663
664 rmpc = MLX5_ADDR_OF(create_rmp_in, in, ctx);
665 wq = MLX5_ADDR_OF(rmpc, rmpc, wq);
666 MLX5_SET(wq, wq, dbr_umem_valid, 1);
667 MLX5_SET(wq, wq, wq_umem_valid, 1);
668 break;
669 }
670
671 case MLX5_CMD_OP_CREATE_XRQ:
672 {
673 void *xrqc, *wq;
674
675 xrqc = MLX5_ADDR_OF(create_xrq_in, in, xrq_context);
676 wq = MLX5_ADDR_OF(xrqc, xrqc, wq);
677 MLX5_SET(wq, wq, dbr_umem_valid, 1);
678 MLX5_SET(wq, wq, wq_umem_valid, 1);
679 break;
680 }
681
682 case MLX5_CMD_OP_CREATE_XRC_SRQ:
683 {
684 void *xrc_srqc;
685
686 MLX5_SET(create_xrc_srq_in, in, xrc_srq_umem_valid, 1);
687 xrc_srqc = MLX5_ADDR_OF(create_xrc_srq_in, in,
688 xrc_srq_context_entry);
689 MLX5_SET(xrc_srqc, xrc_srqc, dbr_umem_valid, 1);
690 break;
691 }
692
693 default:
694 return;
695 }
696}
697
698static bool devx_is_obj_create_cmd(const void *in, u16 *opcode)
699{
700 *opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
701
702 switch (*opcode) {
703 case MLX5_CMD_OP_CREATE_GENERAL_OBJECT:
704 case MLX5_CMD_OP_CREATE_MKEY:
705 case MLX5_CMD_OP_CREATE_CQ:
706 case MLX5_CMD_OP_ALLOC_PD:
707 case MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN:
708 case MLX5_CMD_OP_CREATE_RMP:
709 case MLX5_CMD_OP_CREATE_SQ:
710 case MLX5_CMD_OP_CREATE_RQ:
711 case MLX5_CMD_OP_CREATE_RQT:
712 case MLX5_CMD_OP_CREATE_TIR:
713 case MLX5_CMD_OP_CREATE_TIS:
714 case MLX5_CMD_OP_ALLOC_Q_COUNTER:
715 case MLX5_CMD_OP_CREATE_FLOW_TABLE:
716 case MLX5_CMD_OP_CREATE_FLOW_GROUP:
717 case MLX5_CMD_OP_ALLOC_FLOW_COUNTER:
718 case MLX5_CMD_OP_ALLOC_PACKET_REFORMAT_CONTEXT:
719 case MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT:
720 case MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT:
721 case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
722 case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
723 case MLX5_CMD_OP_CREATE_QP:
724 case MLX5_CMD_OP_CREATE_SRQ:
725 case MLX5_CMD_OP_CREATE_XRC_SRQ:
726 case MLX5_CMD_OP_CREATE_DCT:
727 case MLX5_CMD_OP_CREATE_XRQ:
728 case MLX5_CMD_OP_ATTACH_TO_MCG:
729 case MLX5_CMD_OP_ALLOC_XRCD:
730 return true;
731 case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
732 {
733 u16 op_mod = MLX5_GET(set_fte_in, in, op_mod);
734 if (op_mod == 0)
735 return true;
736 return false;
737 }
738 case MLX5_CMD_OP_CREATE_PSV:
739 {
740 u8 num_psv = MLX5_GET(create_psv_in, in, num_psv);
741
742 if (num_psv == 1)
743 return true;
744 return false;
745 }
746 default:
747 return false;
748 }
749}
750
751static bool devx_is_obj_modify_cmd(const void *in)
752{
753 u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
754
755 switch (opcode) {
756 case MLX5_CMD_OP_MODIFY_GENERAL_OBJECT:
757 case MLX5_CMD_OP_MODIFY_CQ:
758 case MLX5_CMD_OP_MODIFY_RMP:
759 case MLX5_CMD_OP_MODIFY_SQ:
760 case MLX5_CMD_OP_MODIFY_RQ:
761 case MLX5_CMD_OP_MODIFY_RQT:
762 case MLX5_CMD_OP_MODIFY_TIR:
763 case MLX5_CMD_OP_MODIFY_TIS:
764 case MLX5_CMD_OP_MODIFY_FLOW_TABLE:
765 case MLX5_CMD_OP_MODIFY_SCHEDULING_ELEMENT:
766 case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
767 case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
768 case MLX5_CMD_OP_RST2INIT_QP:
769 case MLX5_CMD_OP_INIT2RTR_QP:
770 case MLX5_CMD_OP_INIT2INIT_QP:
771 case MLX5_CMD_OP_RTR2RTS_QP:
772 case MLX5_CMD_OP_RTS2RTS_QP:
773 case MLX5_CMD_OP_SQERR2RTS_QP:
774 case MLX5_CMD_OP_2ERR_QP:
775 case MLX5_CMD_OP_2RST_QP:
776 case MLX5_CMD_OP_ARM_XRC_SRQ:
777 case MLX5_CMD_OP_ARM_RQ:
778 case MLX5_CMD_OP_ARM_DCT_FOR_KEY_VIOLATION:
779 case MLX5_CMD_OP_ARM_XRQ:
780 case MLX5_CMD_OP_SET_XRQ_DC_PARAMS_ENTRY:
781 case MLX5_CMD_OP_RELEASE_XRQ_ERROR:
782 case MLX5_CMD_OP_MODIFY_XRQ:
783 return true;
784 case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
785 {
786 u16 op_mod = MLX5_GET(set_fte_in, in, op_mod);
787
788 if (op_mod == 1)
789 return true;
790 return false;
791 }
792 default:
793 return false;
794 }
795}
796
797static bool devx_is_obj_query_cmd(const void *in)
798{
799 u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
800
801 switch (opcode) {
802 case MLX5_CMD_OP_QUERY_GENERAL_OBJECT:
803 case MLX5_CMD_OP_QUERY_MKEY:
804 case MLX5_CMD_OP_QUERY_CQ:
805 case MLX5_CMD_OP_QUERY_RMP:
806 case MLX5_CMD_OP_QUERY_SQ:
807 case MLX5_CMD_OP_QUERY_RQ:
808 case MLX5_CMD_OP_QUERY_RQT:
809 case MLX5_CMD_OP_QUERY_TIR:
810 case MLX5_CMD_OP_QUERY_TIS:
811 case MLX5_CMD_OP_QUERY_Q_COUNTER:
812 case MLX5_CMD_OP_QUERY_FLOW_TABLE:
813 case MLX5_CMD_OP_QUERY_FLOW_GROUP:
814 case MLX5_CMD_OP_QUERY_FLOW_TABLE_ENTRY:
815 case MLX5_CMD_OP_QUERY_FLOW_COUNTER:
816 case MLX5_CMD_OP_QUERY_MODIFY_HEADER_CONTEXT:
817 case MLX5_CMD_OP_QUERY_SCHEDULING_ELEMENT:
818 case MLX5_CMD_OP_QUERY_L2_TABLE_ENTRY:
819 case MLX5_CMD_OP_QUERY_QP:
820 case MLX5_CMD_OP_QUERY_SRQ:
821 case MLX5_CMD_OP_QUERY_XRC_SRQ:
822 case MLX5_CMD_OP_QUERY_DCT:
823 case MLX5_CMD_OP_QUERY_XRQ:
824 case MLX5_CMD_OP_QUERY_XRQ_DC_PARAMS_ENTRY:
825 case MLX5_CMD_OP_QUERY_XRQ_ERROR_PARAMS:
826 case MLX5_CMD_OP_QUERY_PACKET_REFORMAT_CONTEXT:
827 return true;
828 default:
829 return false;
830 }
831}
832
833static bool devx_is_whitelist_cmd(void *in)
834{
835 u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
836
837 switch (opcode) {
838 case MLX5_CMD_OP_QUERY_HCA_CAP:
839 case MLX5_CMD_OP_QUERY_HCA_VPORT_CONTEXT:
840 case MLX5_CMD_OP_QUERY_ESW_VPORT_CONTEXT:
841 return true;
842 default:
843 return false;
844 }
845}
846
847static int devx_get_uid(struct mlx5_ib_ucontext *c, void *cmd_in)
848{
849 if (devx_is_whitelist_cmd(cmd_in)) {
850 struct mlx5_ib_dev *dev;
851
852 if (c->devx_uid)
853 return c->devx_uid;
854
855 dev = to_mdev(c->ibucontext.device);
856 if (dev->devx_whitelist_uid)
857 return dev->devx_whitelist_uid;
858
859 return -EOPNOTSUPP;
860 }
861
862 if (!c->devx_uid)
863 return -EINVAL;
864
865 return c->devx_uid;
866}
867
868static bool devx_is_general_cmd(void *in, struct mlx5_ib_dev *dev)
869{
870 u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
871
872 /* Pass all cmds for vhca_tunnel as general, tracking is done in FW */
873 if ((MLX5_CAP_GEN_64(dev->mdev, vhca_tunnel_commands) &&
874 MLX5_GET(general_obj_in_cmd_hdr, in, vhca_tunnel_id)) ||
875 (opcode >= MLX5_CMD_OP_GENERAL_START &&
876 opcode < MLX5_CMD_OP_GENERAL_END))
877 return true;
878
879 switch (opcode) {
880 case MLX5_CMD_OP_QUERY_HCA_CAP:
881 case MLX5_CMD_OP_QUERY_HCA_VPORT_CONTEXT:
882 case MLX5_CMD_OP_QUERY_ESW_VPORT_CONTEXT:
883 case MLX5_CMD_OP_QUERY_VPORT_STATE:
884 case MLX5_CMD_OP_QUERY_ADAPTER:
885 case MLX5_CMD_OP_QUERY_ISSI:
886 case MLX5_CMD_OP_QUERY_NIC_VPORT_CONTEXT:
887 case MLX5_CMD_OP_QUERY_ROCE_ADDRESS:
888 case MLX5_CMD_OP_QUERY_VNIC_ENV:
889 case MLX5_CMD_OP_QUERY_VPORT_COUNTER:
890 case MLX5_CMD_OP_GET_DROPPED_PACKET_LOG:
891 case MLX5_CMD_OP_NOP:
892 case MLX5_CMD_OP_QUERY_CONG_STATUS:
893 case MLX5_CMD_OP_QUERY_CONG_PARAMS:
894 case MLX5_CMD_OP_QUERY_CONG_STATISTICS:
895 case MLX5_CMD_OP_QUERY_LAG:
896 return true;
897 default:
898 return false;
899 }
900}
901
902static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_QUERY_EQN)(
903 struct uverbs_attr_bundle *attrs)
904{
905 struct mlx5_ib_ucontext *c;
906 struct mlx5_ib_dev *dev;
907 int user_vector;
908 int dev_eqn;
909 unsigned int irqn;
910 int err;
911
912 if (uverbs_copy_from(&user_vector, attrs,
913 MLX5_IB_ATTR_DEVX_QUERY_EQN_USER_VEC))
914 return -EFAULT;
915
916 c = devx_ufile2uctx(attrs);
917 if (IS_ERR(c))
918 return PTR_ERR(c);
919 dev = to_mdev(c->ibucontext.device);
920
921 err = mlx5_vector2eqn(dev->mdev, user_vector, &dev_eqn, &irqn);
922 if (err < 0)
923 return err;
924
925 if (uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_QUERY_EQN_DEV_EQN,
926 &dev_eqn, sizeof(dev_eqn)))
927 return -EFAULT;
928
929 return 0;
930}
931
932/*
933 *Security note:
934 * The hardware protection mechanism works like this: Each device object that
935 * is subject to UAR doorbells (QP/SQ/CQ) gets a UAR ID (called uar_page in
936 * the device specification manual) upon its creation. Then upon doorbell,
937 * hardware fetches the object context for which the doorbell was rang, and
938 * validates that the UAR through which the DB was rang matches the UAR ID
939 * of the object.
940 * If no match the doorbell is silently ignored by the hardware. Of course,
941 * the user cannot ring a doorbell on a UAR that was not mapped to it.
942 * Now in devx, as the devx kernel does not manipulate the QP/SQ/CQ command
943 * mailboxes (except tagging them with UID), we expose to the user its UAR
944 * ID, so it can embed it in these objects in the expected specification
945 * format. So the only thing the user can do is hurt itself by creating a
946 * QP/SQ/CQ with a UAR ID other than his, and then in this case other users
947 * may ring a doorbell on its objects.
948 * The consequence of that will be that another user can schedule a QP/SQ
949 * of the buggy user for execution (just insert it to the hardware schedule
950 * queue or arm its CQ for event generation), no further harm is expected.
951 */
952static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_QUERY_UAR)(
953 struct uverbs_attr_bundle *attrs)
954{
955 struct mlx5_ib_ucontext *c;
956 struct mlx5_ib_dev *dev;
957 u32 user_idx;
958 s32 dev_idx;
959
960 c = devx_ufile2uctx(attrs);
961 if (IS_ERR(c))
962 return PTR_ERR(c);
963 dev = to_mdev(c->ibucontext.device);
964
965 if (uverbs_copy_from(&user_idx, attrs,
966 MLX5_IB_ATTR_DEVX_QUERY_UAR_USER_IDX))
967 return -EFAULT;
968
969 dev_idx = bfregn_to_uar_index(dev, &c->bfregi, user_idx, true);
970 if (dev_idx < 0)
971 return dev_idx;
972
973 if (uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_QUERY_UAR_DEV_IDX,
974 &dev_idx, sizeof(dev_idx)))
975 return -EFAULT;
976
977 return 0;
978}
979
980static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OTHER)(
981 struct uverbs_attr_bundle *attrs)
982{
983 struct mlx5_ib_ucontext *c;
984 struct mlx5_ib_dev *dev;
985 void *cmd_in = uverbs_attr_get_alloced_ptr(
986 attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_IN);
987 int cmd_out_len = uverbs_attr_get_len(attrs,
988 MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT);
989 void *cmd_out;
990 int err;
991 int uid;
992
993 c = devx_ufile2uctx(attrs);
994 if (IS_ERR(c))
995 return PTR_ERR(c);
996 dev = to_mdev(c->ibucontext.device);
997
998 uid = devx_get_uid(c, cmd_in);
999 if (uid < 0)
1000 return uid;
1001
1002 /* Only white list of some general HCA commands are allowed for this method. */
1003 if (!devx_is_general_cmd(cmd_in, dev))
1004 return -EINVAL;
1005
1006 cmd_out = uverbs_zalloc(attrs, cmd_out_len);
1007 if (IS_ERR(cmd_out))
1008 return PTR_ERR(cmd_out);
1009
1010 MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1011 err = mlx5_cmd_exec(dev->mdev, cmd_in,
1012 uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_IN),
1013 cmd_out, cmd_out_len);
1014 if (err)
1015 return err;
1016
1017 return uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT, cmd_out,
1018 cmd_out_len);
1019}
1020
1021static void devx_obj_build_destroy_cmd(void *in, void *out, void *din,
1022 u32 *dinlen,
1023 u32 *obj_id)
1024{
1025 u16 obj_type = MLX5_GET(general_obj_in_cmd_hdr, in, obj_type);
1026 u16 uid = MLX5_GET(general_obj_in_cmd_hdr, in, uid);
1027
1028 *obj_id = MLX5_GET(general_obj_out_cmd_hdr, out, obj_id);
1029 *dinlen = MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr);
1030
1031 MLX5_SET(general_obj_in_cmd_hdr, din, obj_id, *obj_id);
1032 MLX5_SET(general_obj_in_cmd_hdr, din, uid, uid);
1033
1034 switch (MLX5_GET(general_obj_in_cmd_hdr, in, opcode)) {
1035 case MLX5_CMD_OP_CREATE_GENERAL_OBJECT:
1036 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_GENERAL_OBJECT);
1037 MLX5_SET(general_obj_in_cmd_hdr, din, obj_type, obj_type);
1038 break;
1039
1040 case MLX5_CMD_OP_CREATE_UMEM:
1041 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1042 MLX5_CMD_OP_DESTROY_UMEM);
1043 break;
1044 case MLX5_CMD_OP_CREATE_MKEY:
1045 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_MKEY);
1046 break;
1047 case MLX5_CMD_OP_CREATE_CQ:
1048 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_CQ);
1049 break;
1050 case MLX5_CMD_OP_ALLOC_PD:
1051 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DEALLOC_PD);
1052 break;
1053 case MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN:
1054 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1055 MLX5_CMD_OP_DEALLOC_TRANSPORT_DOMAIN);
1056 break;
1057 case MLX5_CMD_OP_CREATE_RMP:
1058 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_RMP);
1059 break;
1060 case MLX5_CMD_OP_CREATE_SQ:
1061 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_SQ);
1062 break;
1063 case MLX5_CMD_OP_CREATE_RQ:
1064 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_RQ);
1065 break;
1066 case MLX5_CMD_OP_CREATE_RQT:
1067 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_RQT);
1068 break;
1069 case MLX5_CMD_OP_CREATE_TIR:
1070 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_TIR);
1071 break;
1072 case MLX5_CMD_OP_CREATE_TIS:
1073 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_TIS);
1074 break;
1075 case MLX5_CMD_OP_ALLOC_Q_COUNTER:
1076 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1077 MLX5_CMD_OP_DEALLOC_Q_COUNTER);
1078 break;
1079 case MLX5_CMD_OP_CREATE_FLOW_TABLE:
1080 *dinlen = MLX5_ST_SZ_BYTES(destroy_flow_table_in);
1081 *obj_id = MLX5_GET(create_flow_table_out, out, table_id);
1082 MLX5_SET(destroy_flow_table_in, din, other_vport,
1083 MLX5_GET(create_flow_table_in, in, other_vport));
1084 MLX5_SET(destroy_flow_table_in, din, vport_number,
1085 MLX5_GET(create_flow_table_in, in, vport_number));
1086 MLX5_SET(destroy_flow_table_in, din, table_type,
1087 MLX5_GET(create_flow_table_in, in, table_type));
1088 MLX5_SET(destroy_flow_table_in, din, table_id, *obj_id);
1089 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1090 MLX5_CMD_OP_DESTROY_FLOW_TABLE);
1091 break;
1092 case MLX5_CMD_OP_CREATE_FLOW_GROUP:
1093 *dinlen = MLX5_ST_SZ_BYTES(destroy_flow_group_in);
1094 *obj_id = MLX5_GET(create_flow_group_out, out, group_id);
1095 MLX5_SET(destroy_flow_group_in, din, other_vport,
1096 MLX5_GET(create_flow_group_in, in, other_vport));
1097 MLX5_SET(destroy_flow_group_in, din, vport_number,
1098 MLX5_GET(create_flow_group_in, in, vport_number));
1099 MLX5_SET(destroy_flow_group_in, din, table_type,
1100 MLX5_GET(create_flow_group_in, in, table_type));
1101 MLX5_SET(destroy_flow_group_in, din, table_id,
1102 MLX5_GET(create_flow_group_in, in, table_id));
1103 MLX5_SET(destroy_flow_group_in, din, group_id, *obj_id);
1104 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1105 MLX5_CMD_OP_DESTROY_FLOW_GROUP);
1106 break;
1107 case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
1108 *dinlen = MLX5_ST_SZ_BYTES(delete_fte_in);
1109 *obj_id = MLX5_GET(set_fte_in, in, flow_index);
1110 MLX5_SET(delete_fte_in, din, other_vport,
1111 MLX5_GET(set_fte_in, in, other_vport));
1112 MLX5_SET(delete_fte_in, din, vport_number,
1113 MLX5_GET(set_fte_in, in, vport_number));
1114 MLX5_SET(delete_fte_in, din, table_type,
1115 MLX5_GET(set_fte_in, in, table_type));
1116 MLX5_SET(delete_fte_in, din, table_id,
1117 MLX5_GET(set_fte_in, in, table_id));
1118 MLX5_SET(delete_fte_in, din, flow_index, *obj_id);
1119 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1120 MLX5_CMD_OP_DELETE_FLOW_TABLE_ENTRY);
1121 break;
1122 case MLX5_CMD_OP_ALLOC_FLOW_COUNTER:
1123 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1124 MLX5_CMD_OP_DEALLOC_FLOW_COUNTER);
1125 break;
1126 case MLX5_CMD_OP_ALLOC_PACKET_REFORMAT_CONTEXT:
1127 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1128 MLX5_CMD_OP_DEALLOC_PACKET_REFORMAT_CONTEXT);
1129 break;
1130 case MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT:
1131 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1132 MLX5_CMD_OP_DEALLOC_MODIFY_HEADER_CONTEXT);
1133 break;
1134 case MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT:
1135 *dinlen = MLX5_ST_SZ_BYTES(destroy_scheduling_element_in);
1136 *obj_id = MLX5_GET(create_scheduling_element_out, out,
1137 scheduling_element_id);
1138 MLX5_SET(destroy_scheduling_element_in, din,
1139 scheduling_hierarchy,
1140 MLX5_GET(create_scheduling_element_in, in,
1141 scheduling_hierarchy));
1142 MLX5_SET(destroy_scheduling_element_in, din,
1143 scheduling_element_id, *obj_id);
1144 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1145 MLX5_CMD_OP_DESTROY_SCHEDULING_ELEMENT);
1146 break;
1147 case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
1148 *dinlen = MLX5_ST_SZ_BYTES(delete_vxlan_udp_dport_in);
1149 *obj_id = MLX5_GET(add_vxlan_udp_dport_in, in, vxlan_udp_port);
1150 MLX5_SET(delete_vxlan_udp_dport_in, din, vxlan_udp_port, *obj_id);
1151 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1152 MLX5_CMD_OP_DELETE_VXLAN_UDP_DPORT);
1153 break;
1154 case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
1155 *dinlen = MLX5_ST_SZ_BYTES(delete_l2_table_entry_in);
1156 *obj_id = MLX5_GET(set_l2_table_entry_in, in, table_index);
1157 MLX5_SET(delete_l2_table_entry_in, din, table_index, *obj_id);
1158 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1159 MLX5_CMD_OP_DELETE_L2_TABLE_ENTRY);
1160 break;
1161 case MLX5_CMD_OP_CREATE_QP:
1162 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_QP);
1163 break;
1164 case MLX5_CMD_OP_CREATE_SRQ:
1165 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_SRQ);
1166 break;
1167 case MLX5_CMD_OP_CREATE_XRC_SRQ:
1168 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1169 MLX5_CMD_OP_DESTROY_XRC_SRQ);
1170 break;
1171 case MLX5_CMD_OP_CREATE_DCT:
1172 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_DCT);
1173 break;
1174 case MLX5_CMD_OP_CREATE_XRQ:
1175 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_XRQ);
1176 break;
1177 case MLX5_CMD_OP_ATTACH_TO_MCG:
1178 *dinlen = MLX5_ST_SZ_BYTES(detach_from_mcg_in);
1179 MLX5_SET(detach_from_mcg_in, din, qpn,
1180 MLX5_GET(attach_to_mcg_in, in, qpn));
1181 memcpy(MLX5_ADDR_OF(detach_from_mcg_in, din, multicast_gid),
1182 MLX5_ADDR_OF(attach_to_mcg_in, in, multicast_gid),
1183 MLX5_FLD_SZ_BYTES(attach_to_mcg_in, multicast_gid));
1184 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DETACH_FROM_MCG);
1185 break;
1186 case MLX5_CMD_OP_ALLOC_XRCD:
1187 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DEALLOC_XRCD);
1188 break;
1189 case MLX5_CMD_OP_CREATE_PSV:
1190 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1191 MLX5_CMD_OP_DESTROY_PSV);
1192 MLX5_SET(destroy_psv_in, din, psvn,
1193 MLX5_GET(create_psv_out, out, psv0_index));
1194 break;
1195 default:
1196 /* The entry must match to one of the devx_is_obj_create_cmd */
1197 WARN_ON(true);
1198 break;
1199 }
1200}
1201
1202static int devx_handle_mkey_indirect(struct devx_obj *obj,
1203 struct mlx5_ib_dev *dev,
1204 void *in, void *out)
1205{
1206 struct mlx5_ib_devx_mr *devx_mr = &obj->devx_mr;
1207 struct mlx5_core_mkey *mkey;
1208 void *mkc;
1209 u8 key;
1210
1211 mkey = &devx_mr->mmkey;
1212 mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry);
1213 key = MLX5_GET(mkc, mkc, mkey_7_0);
1214 mkey->key = mlx5_idx_to_mkey(
1215 MLX5_GET(create_mkey_out, out, mkey_index)) | key;
1216 mkey->type = MLX5_MKEY_INDIRECT_DEVX;
1217 mkey->iova = MLX5_GET64(mkc, mkc, start_addr);
1218 mkey->size = MLX5_GET64(mkc, mkc, len);
1219 mkey->pd = MLX5_GET(mkc, mkc, pd);
1220 devx_mr->ndescs = MLX5_GET(mkc, mkc, translations_octword_size);
1221
1222 return xa_err(xa_store(&dev->odp_mkeys, mlx5_base_mkey(mkey->key), mkey,
1223 GFP_KERNEL));
1224}
1225
1226static int devx_handle_mkey_create(struct mlx5_ib_dev *dev,
1227 struct devx_obj *obj,
1228 void *in, int in_len)
1229{
1230 int min_len = MLX5_BYTE_OFF(create_mkey_in, memory_key_mkey_entry) +
1231 MLX5_FLD_SZ_BYTES(create_mkey_in,
1232 memory_key_mkey_entry);
1233 void *mkc;
1234 u8 access_mode;
1235
1236 if (in_len < min_len)
1237 return -EINVAL;
1238
1239 mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry);
1240
1241 access_mode = MLX5_GET(mkc, mkc, access_mode_1_0);
1242 access_mode |= MLX5_GET(mkc, mkc, access_mode_4_2) << 2;
1243
1244 if (access_mode == MLX5_MKC_ACCESS_MODE_KLMS ||
1245 access_mode == MLX5_MKC_ACCESS_MODE_KSM) {
1246 if (IS_ENABLED(CONFIG_INFINIBAND_ON_DEMAND_PAGING))
1247 obj->flags |= DEVX_OBJ_FLAGS_INDIRECT_MKEY;
1248 return 0;
1249 }
1250
1251 MLX5_SET(create_mkey_in, in, mkey_umem_valid, 1);
1252 return 0;
1253}
1254
1255static void devx_cleanup_subscription(struct mlx5_ib_dev *dev,
1256 struct devx_event_subscription *sub)
1257{
1258 struct devx_event *event;
1259 struct devx_obj_event *xa_val_level2;
1260
1261 if (sub->is_cleaned)
1262 return;
1263
1264 sub->is_cleaned = 1;
1265 list_del_rcu(&sub->xa_list);
1266
1267 if (list_empty(&sub->obj_list))
1268 return;
1269
1270 list_del_rcu(&sub->obj_list);
1271 /* check whether key level 1 for this obj_sub_list is empty */
1272 event = xa_load(&dev->devx_event_table.event_xa,
1273 sub->xa_key_level1);
1274 WARN_ON(!event);
1275
1276 xa_val_level2 = xa_load(&event->object_ids, sub->xa_key_level2);
1277 if (list_empty(&xa_val_level2->obj_sub_list)) {
1278 xa_erase(&event->object_ids,
1279 sub->xa_key_level2);
1280 kfree_rcu(xa_val_level2, rcu);
1281 }
1282}
1283
1284static int devx_obj_cleanup(struct ib_uobject *uobject,
1285 enum rdma_remove_reason why,
1286 struct uverbs_attr_bundle *attrs)
1287{
1288 u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
1289 struct mlx5_devx_event_table *devx_event_table;
1290 struct devx_obj *obj = uobject->object;
1291 struct devx_event_subscription *sub_entry, *tmp;
1292 struct mlx5_ib_dev *dev;
1293 int ret;
1294
1295 dev = mlx5_udata_to_mdev(&attrs->driver_udata);
1296 if (obj->flags & DEVX_OBJ_FLAGS_INDIRECT_MKEY) {
1297 /*
1298 * The pagefault_single_data_segment() does commands against
1299 * the mmkey, we must wait for that to stop before freeing the
1300 * mkey, as another allocation could get the same mkey #.
1301 */
1302 xa_erase(&obj->ib_dev->odp_mkeys,
1303 mlx5_base_mkey(obj->devx_mr.mmkey.key));
1304 synchronize_srcu(&dev->odp_srcu);
1305 }
1306
1307 if (obj->flags & DEVX_OBJ_FLAGS_DCT)
1308 ret = mlx5_core_destroy_dct(obj->ib_dev, &obj->core_dct);
1309 else if (obj->flags & DEVX_OBJ_FLAGS_CQ)
1310 ret = mlx5_core_destroy_cq(obj->ib_dev->mdev, &obj->core_cq);
1311 else
1312 ret = mlx5_cmd_exec(obj->ib_dev->mdev, obj->dinbox,
1313 obj->dinlen, out, sizeof(out));
1314 if (ib_is_destroy_retryable(ret, why, uobject))
1315 return ret;
1316
1317 devx_event_table = &dev->devx_event_table;
1318
1319 mutex_lock(&devx_event_table->event_xa_lock);
1320 list_for_each_entry_safe(sub_entry, tmp, &obj->event_sub, obj_list)
1321 devx_cleanup_subscription(dev, sub_entry);
1322 mutex_unlock(&devx_event_table->event_xa_lock);
1323
1324 kfree(obj);
1325 return ret;
1326}
1327
1328static void devx_cq_comp(struct mlx5_core_cq *mcq, struct mlx5_eqe *eqe)
1329{
1330 struct devx_obj *obj = container_of(mcq, struct devx_obj, core_cq);
1331 struct mlx5_devx_event_table *table;
1332 struct devx_event *event;
1333 struct devx_obj_event *obj_event;
1334 u32 obj_id = mcq->cqn;
1335
1336 table = &obj->ib_dev->devx_event_table;
1337 rcu_read_lock();
1338 event = xa_load(&table->event_xa, MLX5_EVENT_TYPE_COMP);
1339 if (!event)
1340 goto out;
1341
1342 obj_event = xa_load(&event->object_ids, obj_id);
1343 if (!obj_event)
1344 goto out;
1345
1346 dispatch_event_fd(&obj_event->obj_sub_list, eqe);
1347out:
1348 rcu_read_unlock();
1349}
1350
1351static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_CREATE)(
1352 struct uverbs_attr_bundle *attrs)
1353{
1354 void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN);
1355 int cmd_out_len = uverbs_attr_get_len(attrs,
1356 MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT);
1357 int cmd_in_len = uverbs_attr_get_len(attrs,
1358 MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN);
1359 void *cmd_out;
1360 struct ib_uobject *uobj = uverbs_attr_get_uobject(
1361 attrs, MLX5_IB_ATTR_DEVX_OBJ_CREATE_HANDLE);
1362 struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1363 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1364 struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
1365 u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
1366 struct devx_obj *obj;
1367 u16 obj_type = 0;
1368 int err;
1369 int uid;
1370 u32 obj_id;
1371 u16 opcode;
1372
1373 if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id))
1374 return -EINVAL;
1375
1376 uid = devx_get_uid(c, cmd_in);
1377 if (uid < 0)
1378 return uid;
1379
1380 if (!devx_is_obj_create_cmd(cmd_in, &opcode))
1381 return -EINVAL;
1382
1383 cmd_out = uverbs_zalloc(attrs, cmd_out_len);
1384 if (IS_ERR(cmd_out))
1385 return PTR_ERR(cmd_out);
1386
1387 obj = kzalloc(sizeof(struct devx_obj), GFP_KERNEL);
1388 if (!obj)
1389 return -ENOMEM;
1390
1391 MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1392 if (opcode == MLX5_CMD_OP_CREATE_MKEY) {
1393 err = devx_handle_mkey_create(dev, obj, cmd_in, cmd_in_len);
1394 if (err)
1395 goto obj_free;
1396 } else {
1397 devx_set_umem_valid(cmd_in);
1398 }
1399
1400 if (opcode == MLX5_CMD_OP_CREATE_DCT) {
1401 obj->flags |= DEVX_OBJ_FLAGS_DCT;
1402 err = mlx5_core_create_dct(dev, &obj->core_dct, cmd_in,
1403 cmd_in_len, cmd_out, cmd_out_len);
1404 } else if (opcode == MLX5_CMD_OP_CREATE_CQ) {
1405 obj->flags |= DEVX_OBJ_FLAGS_CQ;
1406 obj->core_cq.comp = devx_cq_comp;
1407 err = mlx5_core_create_cq(dev->mdev, &obj->core_cq,
1408 cmd_in, cmd_in_len, cmd_out,
1409 cmd_out_len);
1410 } else {
1411 err = mlx5_cmd_exec(dev->mdev, cmd_in,
1412 cmd_in_len,
1413 cmd_out, cmd_out_len);
1414 }
1415
1416 if (err)
1417 goto obj_free;
1418
1419 if (opcode == MLX5_CMD_OP_ALLOC_FLOW_COUNTER) {
1420 u8 bulk = MLX5_GET(alloc_flow_counter_in,
1421 cmd_in,
1422 flow_counter_bulk);
1423 obj->flow_counter_bulk_size = 128UL * bulk;
1424 }
1425
1426 uobj->object = obj;
1427 INIT_LIST_HEAD(&obj->event_sub);
1428 obj->ib_dev = dev;
1429 devx_obj_build_destroy_cmd(cmd_in, cmd_out, obj->dinbox, &obj->dinlen,
1430 &obj_id);
1431 WARN_ON(obj->dinlen > MLX5_MAX_DESTROY_INBOX_SIZE_DW * sizeof(u32));
1432
1433 err = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT, cmd_out, cmd_out_len);
1434 if (err)
1435 goto obj_destroy;
1436
1437 if (opcode == MLX5_CMD_OP_CREATE_GENERAL_OBJECT)
1438 obj_type = MLX5_GET(general_obj_in_cmd_hdr, cmd_in, obj_type);
1439 obj->obj_id = get_enc_obj_id(opcode | obj_type << 16, obj_id);
1440
1441 if (obj->flags & DEVX_OBJ_FLAGS_INDIRECT_MKEY) {
1442 err = devx_handle_mkey_indirect(obj, dev, cmd_in, cmd_out);
1443 if (err)
1444 goto obj_destroy;
1445 }
1446 return 0;
1447
1448obj_destroy:
1449 if (obj->flags & DEVX_OBJ_FLAGS_DCT)
1450 mlx5_core_destroy_dct(obj->ib_dev, &obj->core_dct);
1451 else if (obj->flags & DEVX_OBJ_FLAGS_CQ)
1452 mlx5_core_destroy_cq(obj->ib_dev->mdev, &obj->core_cq);
1453 else
1454 mlx5_cmd_exec(obj->ib_dev->mdev, obj->dinbox, obj->dinlen, out,
1455 sizeof(out));
1456obj_free:
1457 kfree(obj);
1458 return err;
1459}
1460
1461static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_MODIFY)(
1462 struct uverbs_attr_bundle *attrs)
1463{
1464 void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN);
1465 int cmd_out_len = uverbs_attr_get_len(attrs,
1466 MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT);
1467 struct ib_uobject *uobj = uverbs_attr_get_uobject(attrs,
1468 MLX5_IB_ATTR_DEVX_OBJ_MODIFY_HANDLE);
1469 struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1470 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1471 struct mlx5_ib_dev *mdev = to_mdev(c->ibucontext.device);
1472 void *cmd_out;
1473 int err;
1474 int uid;
1475
1476 if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id))
1477 return -EINVAL;
1478
1479 uid = devx_get_uid(c, cmd_in);
1480 if (uid < 0)
1481 return uid;
1482
1483 if (!devx_is_obj_modify_cmd(cmd_in))
1484 return -EINVAL;
1485
1486 if (!devx_is_valid_obj_id(attrs, uobj, cmd_in))
1487 return -EINVAL;
1488
1489 cmd_out = uverbs_zalloc(attrs, cmd_out_len);
1490 if (IS_ERR(cmd_out))
1491 return PTR_ERR(cmd_out);
1492
1493 MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1494 devx_set_umem_valid(cmd_in);
1495
1496 err = mlx5_cmd_exec(mdev->mdev, cmd_in,
1497 uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN),
1498 cmd_out, cmd_out_len);
1499 if (err)
1500 return err;
1501
1502 return uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT,
1503 cmd_out, cmd_out_len);
1504}
1505
1506static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_QUERY)(
1507 struct uverbs_attr_bundle *attrs)
1508{
1509 void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN);
1510 int cmd_out_len = uverbs_attr_get_len(attrs,
1511 MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT);
1512 struct ib_uobject *uobj = uverbs_attr_get_uobject(attrs,
1513 MLX5_IB_ATTR_DEVX_OBJ_QUERY_HANDLE);
1514 struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1515 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1516 void *cmd_out;
1517 int err;
1518 int uid;
1519 struct mlx5_ib_dev *mdev = to_mdev(c->ibucontext.device);
1520
1521 if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id))
1522 return -EINVAL;
1523
1524 uid = devx_get_uid(c, cmd_in);
1525 if (uid < 0)
1526 return uid;
1527
1528 if (!devx_is_obj_query_cmd(cmd_in))
1529 return -EINVAL;
1530
1531 if (!devx_is_valid_obj_id(attrs, uobj, cmd_in))
1532 return -EINVAL;
1533
1534 cmd_out = uverbs_zalloc(attrs, cmd_out_len);
1535 if (IS_ERR(cmd_out))
1536 return PTR_ERR(cmd_out);
1537
1538 MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1539 err = mlx5_cmd_exec(mdev->mdev, cmd_in,
1540 uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN),
1541 cmd_out, cmd_out_len);
1542 if (err)
1543 return err;
1544
1545 return uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT,
1546 cmd_out, cmd_out_len);
1547}
1548
1549struct devx_async_event_queue {
1550 spinlock_t lock;
1551 wait_queue_head_t poll_wait;
1552 struct list_head event_list;
1553 atomic_t bytes_in_use;
1554 u8 is_destroyed:1;
1555};
1556
1557struct devx_async_cmd_event_file {
1558 struct ib_uobject uobj;
1559 struct devx_async_event_queue ev_queue;
1560 struct mlx5_async_ctx async_ctx;
1561};
1562
1563static void devx_init_event_queue(struct devx_async_event_queue *ev_queue)
1564{
1565 spin_lock_init(&ev_queue->lock);
1566 INIT_LIST_HEAD(&ev_queue->event_list);
1567 init_waitqueue_head(&ev_queue->poll_wait);
1568 atomic_set(&ev_queue->bytes_in_use, 0);
1569 ev_queue->is_destroyed = 0;
1570}
1571
1572static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC)(
1573 struct uverbs_attr_bundle *attrs)
1574{
1575 struct devx_async_cmd_event_file *ev_file;
1576
1577 struct ib_uobject *uobj = uverbs_attr_get_uobject(
1578 attrs, MLX5_IB_ATTR_DEVX_ASYNC_CMD_FD_ALLOC_HANDLE);
1579 struct mlx5_ib_dev *mdev = mlx5_udata_to_mdev(&attrs->driver_udata);
1580
1581 ev_file = container_of(uobj, struct devx_async_cmd_event_file,
1582 uobj);
1583 devx_init_event_queue(&ev_file->ev_queue);
1584 mlx5_cmd_init_async_ctx(mdev->mdev, &ev_file->async_ctx);
1585 return 0;
1586}
1587
1588static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC)(
1589 struct uverbs_attr_bundle *attrs)
1590{
1591 struct ib_uobject *uobj = uverbs_attr_get_uobject(
1592 attrs, MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_HANDLE);
1593 struct devx_async_event_file *ev_file;
1594 struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1595 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1596 struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
1597 u32 flags;
1598 int err;
1599
1600 err = uverbs_get_flags32(&flags, attrs,
1601 MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_FLAGS,
1602 MLX5_IB_UAPI_DEVX_CR_EV_CH_FLAGS_OMIT_DATA);
1603
1604 if (err)
1605 return err;
1606
1607 ev_file = container_of(uobj, struct devx_async_event_file,
1608 uobj);
1609 spin_lock_init(&ev_file->lock);
1610 INIT_LIST_HEAD(&ev_file->event_list);
1611 init_waitqueue_head(&ev_file->poll_wait);
1612 if (flags & MLX5_IB_UAPI_DEVX_CR_EV_CH_FLAGS_OMIT_DATA)
1613 ev_file->omit_data = 1;
1614 INIT_LIST_HEAD(&ev_file->subscribed_events_list);
1615 ev_file->dev = dev;
1616 get_device(&dev->ib_dev.dev);
1617 return 0;
1618}
1619
1620static void devx_query_callback(int status, struct mlx5_async_work *context)
1621{
1622 struct devx_async_data *async_data =
1623 container_of(context, struct devx_async_data, cb_work);
1624 struct devx_async_cmd_event_file *ev_file = async_data->ev_file;
1625 struct devx_async_event_queue *ev_queue = &ev_file->ev_queue;
1626 unsigned long flags;
1627
1628 /*
1629 * Note that if the struct devx_async_cmd_event_file uobj begins to be
1630 * destroyed it will block at mlx5_cmd_cleanup_async_ctx() until this
1631 * routine returns, ensuring that it always remains valid here.
1632 */
1633 spin_lock_irqsave(&ev_queue->lock, flags);
1634 list_add_tail(&async_data->list, &ev_queue->event_list);
1635 spin_unlock_irqrestore(&ev_queue->lock, flags);
1636
1637 wake_up_interruptible(&ev_queue->poll_wait);
1638}
1639
1640#define MAX_ASYNC_BYTES_IN_USE (1024 * 1024) /* 1MB */
1641
1642static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_ASYNC_QUERY)(
1643 struct uverbs_attr_bundle *attrs)
1644{
1645 void *cmd_in = uverbs_attr_get_alloced_ptr(attrs,
1646 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_CMD_IN);
1647 struct ib_uobject *uobj = uverbs_attr_get_uobject(
1648 attrs,
1649 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_HANDLE);
1650 u16 cmd_out_len;
1651 struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1652 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1653 struct ib_uobject *fd_uobj;
1654 int err;
1655 int uid;
1656 struct mlx5_ib_dev *mdev = to_mdev(c->ibucontext.device);
1657 struct devx_async_cmd_event_file *ev_file;
1658 struct devx_async_data *async_data;
1659
1660 if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id))
1661 return -EINVAL;
1662
1663 uid = devx_get_uid(c, cmd_in);
1664 if (uid < 0)
1665 return uid;
1666
1667 if (!devx_is_obj_query_cmd(cmd_in))
1668 return -EINVAL;
1669
1670 err = uverbs_get_const(&cmd_out_len, attrs,
1671 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_OUT_LEN);
1672 if (err)
1673 return err;
1674
1675 if (!devx_is_valid_obj_id(attrs, uobj, cmd_in))
1676 return -EINVAL;
1677
1678 fd_uobj = uverbs_attr_get_uobject(attrs,
1679 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_FD);
1680 if (IS_ERR(fd_uobj))
1681 return PTR_ERR(fd_uobj);
1682
1683 ev_file = container_of(fd_uobj, struct devx_async_cmd_event_file,
1684 uobj);
1685
1686 if (atomic_add_return(cmd_out_len, &ev_file->ev_queue.bytes_in_use) >
1687 MAX_ASYNC_BYTES_IN_USE) {
1688 atomic_sub(cmd_out_len, &ev_file->ev_queue.bytes_in_use);
1689 return -EAGAIN;
1690 }
1691
1692 async_data = kvzalloc(struct_size(async_data, hdr.out_data,
1693 cmd_out_len), GFP_KERNEL);
1694 if (!async_data) {
1695 err = -ENOMEM;
1696 goto sub_bytes;
1697 }
1698
1699 err = uverbs_copy_from(&async_data->hdr.wr_id, attrs,
1700 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_WR_ID);
1701 if (err)
1702 goto free_async;
1703
1704 async_data->cmd_out_len = cmd_out_len;
1705 async_data->mdev = mdev;
1706 async_data->ev_file = ev_file;
1707
1708 MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1709 err = mlx5_cmd_exec_cb(&ev_file->async_ctx, cmd_in,
1710 uverbs_attr_get_len(attrs,
1711 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_CMD_IN),
1712 async_data->hdr.out_data,
1713 async_data->cmd_out_len,
1714 devx_query_callback, &async_data->cb_work);
1715
1716 if (err)
1717 goto free_async;
1718
1719 return 0;
1720
1721free_async:
1722 kvfree(async_data);
1723sub_bytes:
1724 atomic_sub(cmd_out_len, &ev_file->ev_queue.bytes_in_use);
1725 return err;
1726}
1727
1728static void
1729subscribe_event_xa_dealloc(struct mlx5_devx_event_table *devx_event_table,
1730 u32 key_level1,
1731 bool is_level2,
1732 u32 key_level2)
1733{
1734 struct devx_event *event;
1735 struct devx_obj_event *xa_val_level2;
1736
1737 /* Level 1 is valid for future use, no need to free */
1738 if (!is_level2)
1739 return;
1740
1741 event = xa_load(&devx_event_table->event_xa, key_level1);
1742 WARN_ON(!event);
1743
1744 xa_val_level2 = xa_load(&event->object_ids,
1745 key_level2);
1746 if (list_empty(&xa_val_level2->obj_sub_list)) {
1747 xa_erase(&event->object_ids,
1748 key_level2);
1749 kfree_rcu(xa_val_level2, rcu);
1750 }
1751}
1752
1753static int
1754subscribe_event_xa_alloc(struct mlx5_devx_event_table *devx_event_table,
1755 u32 key_level1,
1756 bool is_level2,
1757 u32 key_level2)
1758{
1759 struct devx_obj_event *obj_event;
1760 struct devx_event *event;
1761 int err;
1762
1763 event = xa_load(&devx_event_table->event_xa, key_level1);
1764 if (!event) {
1765 event = kzalloc(sizeof(*event), GFP_KERNEL);
1766 if (!event)
1767 return -ENOMEM;
1768
1769 INIT_LIST_HEAD(&event->unaffiliated_list);
1770 xa_init(&event->object_ids);
1771
1772 err = xa_insert(&devx_event_table->event_xa,
1773 key_level1,
1774 event,
1775 GFP_KERNEL);
1776 if (err) {
1777 kfree(event);
1778 return err;
1779 }
1780 }
1781
1782 if (!is_level2)
1783 return 0;
1784
1785 obj_event = xa_load(&event->object_ids, key_level2);
1786 if (!obj_event) {
1787 obj_event = kzalloc(sizeof(*obj_event), GFP_KERNEL);
1788 if (!obj_event)
1789 /* Level1 is valid for future use, no need to free */
1790 return -ENOMEM;
1791
1792 err = xa_insert(&event->object_ids,
1793 key_level2,
1794 obj_event,
1795 GFP_KERNEL);
1796 if (err)
1797 return err;
1798 INIT_LIST_HEAD(&obj_event->obj_sub_list);
1799 }
1800
1801 return 0;
1802}
1803
1804static bool is_valid_events_legacy(int num_events, u16 *event_type_num_list,
1805 struct devx_obj *obj)
1806{
1807 int i;
1808
1809 for (i = 0; i < num_events; i++) {
1810 if (obj) {
1811 if (!is_legacy_obj_event_num(event_type_num_list[i]))
1812 return false;
1813 } else if (!is_legacy_unaffiliated_event_num(
1814 event_type_num_list[i])) {
1815 return false;
1816 }
1817 }
1818
1819 return true;
1820}
1821
1822#define MAX_SUPP_EVENT_NUM 255
1823static bool is_valid_events(struct mlx5_core_dev *dev,
1824 int num_events, u16 *event_type_num_list,
1825 struct devx_obj *obj)
1826{
1827 __be64 *aff_events;
1828 __be64 *unaff_events;
1829 int mask_entry;
1830 int mask_bit;
1831 int i;
1832
1833 if (MLX5_CAP_GEN(dev, event_cap)) {
1834 aff_events = MLX5_CAP_DEV_EVENT(dev,
1835 user_affiliated_events);
1836 unaff_events = MLX5_CAP_DEV_EVENT(dev,
1837 user_unaffiliated_events);
1838 } else {
1839 return is_valid_events_legacy(num_events, event_type_num_list,
1840 obj);
1841 }
1842
1843 for (i = 0; i < num_events; i++) {
1844 if (event_type_num_list[i] > MAX_SUPP_EVENT_NUM)
1845 return false;
1846
1847 mask_entry = event_type_num_list[i] / 64;
1848 mask_bit = event_type_num_list[i] % 64;
1849
1850 if (obj) {
1851 /* CQ completion */
1852 if (event_type_num_list[i] == 0)
1853 continue;
1854
1855 if (!(be64_to_cpu(aff_events[mask_entry]) &
1856 (1ull << mask_bit)))
1857 return false;
1858
1859 continue;
1860 }
1861
1862 if (!(be64_to_cpu(unaff_events[mask_entry]) &
1863 (1ull << mask_bit)))
1864 return false;
1865 }
1866
1867 return true;
1868}
1869
1870#define MAX_NUM_EVENTS 16
1871static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT)(
1872 struct uverbs_attr_bundle *attrs)
1873{
1874 struct ib_uobject *devx_uobj = uverbs_attr_get_uobject(
1875 attrs,
1876 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_OBJ_HANDLE);
1877 struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1878 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1879 struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
1880 struct ib_uobject *fd_uobj;
1881 struct devx_obj *obj = NULL;
1882 struct devx_async_event_file *ev_file;
1883 struct mlx5_devx_event_table *devx_event_table = &dev->devx_event_table;
1884 u16 *event_type_num_list;
1885 struct devx_event_subscription *event_sub, *tmp_sub;
1886 struct list_head sub_list;
1887 int redirect_fd;
1888 bool use_eventfd = false;
1889 int num_events;
1890 int num_alloc_xa_entries = 0;
1891 u16 obj_type = 0;
1892 u64 cookie = 0;
1893 u32 obj_id = 0;
1894 int err;
1895 int i;
1896
1897 if (!c->devx_uid)
1898 return -EINVAL;
1899
1900 if (!IS_ERR(devx_uobj)) {
1901 obj = (struct devx_obj *)devx_uobj->object;
1902 if (obj)
1903 obj_id = get_dec_obj_id(obj->obj_id);
1904 }
1905
1906 fd_uobj = uverbs_attr_get_uobject(attrs,
1907 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_HANDLE);
1908 if (IS_ERR(fd_uobj))
1909 return PTR_ERR(fd_uobj);
1910
1911 ev_file = container_of(fd_uobj, struct devx_async_event_file,
1912 uobj);
1913
1914 if (uverbs_attr_is_valid(attrs,
1915 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_NUM)) {
1916 err = uverbs_copy_from(&redirect_fd, attrs,
1917 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_NUM);
1918 if (err)
1919 return err;
1920
1921 use_eventfd = true;
1922 }
1923
1924 if (uverbs_attr_is_valid(attrs,
1925 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_COOKIE)) {
1926 if (use_eventfd)
1927 return -EINVAL;
1928
1929 err = uverbs_copy_from(&cookie, attrs,
1930 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_COOKIE);
1931 if (err)
1932 return err;
1933 }
1934
1935 num_events = uverbs_attr_ptr_get_array_size(
1936 attrs, MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_TYPE_NUM_LIST,
1937 sizeof(u16));
1938
1939 if (num_events < 0)
1940 return num_events;
1941
1942 if (num_events > MAX_NUM_EVENTS)
1943 return -EINVAL;
1944
1945 event_type_num_list = uverbs_attr_get_alloced_ptr(attrs,
1946 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_TYPE_NUM_LIST);
1947
1948 if (!is_valid_events(dev->mdev, num_events, event_type_num_list, obj))
1949 return -EINVAL;
1950
1951 INIT_LIST_HEAD(&sub_list);
1952
1953 /* Protect from concurrent subscriptions to same XA entries to allow
1954 * both to succeed
1955 */
1956 mutex_lock(&devx_event_table->event_xa_lock);
1957 for (i = 0; i < num_events; i++) {
1958 u32 key_level1;
1959
1960 if (obj)
1961 obj_type = get_dec_obj_type(obj,
1962 event_type_num_list[i]);
1963 key_level1 = event_type_num_list[i] | obj_type << 16;
1964
1965 err = subscribe_event_xa_alloc(devx_event_table,
1966 key_level1,
1967 obj,
1968 obj_id);
1969 if (err)
1970 goto err;
1971
1972 num_alloc_xa_entries++;
1973 event_sub = kzalloc(sizeof(*event_sub), GFP_KERNEL);
1974 if (!event_sub)
1975 goto err;
1976
1977 list_add_tail(&event_sub->event_list, &sub_list);
1978 uverbs_uobject_get(&ev_file->uobj);
1979 if (use_eventfd) {
1980 event_sub->eventfd =
1981 eventfd_ctx_fdget(redirect_fd);
1982
1983 if (IS_ERR(event_sub->eventfd)) {
1984 err = PTR_ERR(event_sub->eventfd);
1985 event_sub->eventfd = NULL;
1986 goto err;
1987 }
1988 }
1989
1990 event_sub->cookie = cookie;
1991 event_sub->ev_file = ev_file;
1992 /* May be needed upon cleanup the devx object/subscription */
1993 event_sub->xa_key_level1 = key_level1;
1994 event_sub->xa_key_level2 = obj_id;
1995 INIT_LIST_HEAD(&event_sub->obj_list);
1996 }
1997
1998 /* Once all the allocations and the XA data insertions were done we
1999 * can go ahead and add all the subscriptions to the relevant lists
2000 * without concern of a failure.
2001 */
2002 list_for_each_entry_safe(event_sub, tmp_sub, &sub_list, event_list) {
2003 struct devx_event *event;
2004 struct devx_obj_event *obj_event;
2005
2006 list_del_init(&event_sub->event_list);
2007
2008 spin_lock_irq(&ev_file->lock);
2009 list_add_tail_rcu(&event_sub->file_list,
2010 &ev_file->subscribed_events_list);
2011 spin_unlock_irq(&ev_file->lock);
2012
2013 event = xa_load(&devx_event_table->event_xa,
2014 event_sub->xa_key_level1);
2015 WARN_ON(!event);
2016
2017 if (!obj) {
2018 list_add_tail_rcu(&event_sub->xa_list,
2019 &event->unaffiliated_list);
2020 continue;
2021 }
2022
2023 obj_event = xa_load(&event->object_ids, obj_id);
2024 WARN_ON(!obj_event);
2025 list_add_tail_rcu(&event_sub->xa_list,
2026 &obj_event->obj_sub_list);
2027 list_add_tail_rcu(&event_sub->obj_list,
2028 &obj->event_sub);
2029 }
2030
2031 mutex_unlock(&devx_event_table->event_xa_lock);
2032 return 0;
2033
2034err:
2035 list_for_each_entry_safe(event_sub, tmp_sub, &sub_list, event_list) {
2036 list_del(&event_sub->event_list);
2037
2038 subscribe_event_xa_dealloc(devx_event_table,
2039 event_sub->xa_key_level1,
2040 obj,
2041 obj_id);
2042
2043 if (event_sub->eventfd)
2044 eventfd_ctx_put(event_sub->eventfd);
2045 uverbs_uobject_put(&event_sub->ev_file->uobj);
2046 kfree(event_sub);
2047 }
2048
2049 mutex_unlock(&devx_event_table->event_xa_lock);
2050 return err;
2051}
2052
2053static int devx_umem_get(struct mlx5_ib_dev *dev, struct ib_ucontext *ucontext,
2054 struct uverbs_attr_bundle *attrs,
2055 struct devx_umem *obj)
2056{
2057 u64 addr;
2058 size_t size;
2059 u32 access;
2060 int npages;
2061 int err;
2062 u32 page_mask;
2063
2064 if (uverbs_copy_from(&addr, attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_ADDR) ||
2065 uverbs_copy_from(&size, attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_LEN))
2066 return -EFAULT;
2067
2068 err = uverbs_get_flags32(&access, attrs,
2069 MLX5_IB_ATTR_DEVX_UMEM_REG_ACCESS,
2070 IB_ACCESS_LOCAL_WRITE |
2071 IB_ACCESS_REMOTE_WRITE |
2072 IB_ACCESS_REMOTE_READ);
2073 if (err)
2074 return err;
2075
2076 err = ib_check_mr_access(access);
2077 if (err)
2078 return err;
2079
2080 obj->umem = ib_umem_get(&dev->ib_dev, addr, size, access);
2081 if (IS_ERR(obj->umem))
2082 return PTR_ERR(obj->umem);
2083
2084 mlx5_ib_cont_pages(obj->umem, obj->umem->address,
2085 MLX5_MKEY_PAGE_SHIFT_MASK, &npages,
2086 &obj->page_shift, &obj->ncont, NULL);
2087
2088 if (!npages) {
2089 ib_umem_release(obj->umem);
2090 return -EINVAL;
2091 }
2092
2093 page_mask = (1 << obj->page_shift) - 1;
2094 obj->page_offset = obj->umem->address & page_mask;
2095
2096 return 0;
2097}
2098
2099static int devx_umem_reg_cmd_alloc(struct uverbs_attr_bundle *attrs,
2100 struct devx_umem *obj,
2101 struct devx_umem_reg_cmd *cmd)
2102{
2103 cmd->inlen = MLX5_ST_SZ_BYTES(create_umem_in) +
2104 (MLX5_ST_SZ_BYTES(mtt) * obj->ncont);
2105 cmd->in = uverbs_zalloc(attrs, cmd->inlen);
2106 return PTR_ERR_OR_ZERO(cmd->in);
2107}
2108
2109static void devx_umem_reg_cmd_build(struct mlx5_ib_dev *dev,
2110 struct devx_umem *obj,
2111 struct devx_umem_reg_cmd *cmd)
2112{
2113 void *umem;
2114 __be64 *mtt;
2115
2116 umem = MLX5_ADDR_OF(create_umem_in, cmd->in, umem);
2117 mtt = (__be64 *)MLX5_ADDR_OF(umem, umem, mtt);
2118
2119 MLX5_SET(create_umem_in, cmd->in, opcode, MLX5_CMD_OP_CREATE_UMEM);
2120 MLX5_SET64(umem, umem, num_of_mtt, obj->ncont);
2121 MLX5_SET(umem, umem, log_page_size, obj->page_shift -
2122 MLX5_ADAPTER_PAGE_SHIFT);
2123 MLX5_SET(umem, umem, page_offset, obj->page_offset);
2124 mlx5_ib_populate_pas(dev, obj->umem, obj->page_shift, mtt,
2125 (obj->umem->writable ? MLX5_IB_MTT_WRITE : 0) |
2126 MLX5_IB_MTT_READ);
2127}
2128
2129static 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(attrs, obj, &cmd);
2154 if (err)
2155 goto err_umem_release;
2156
2157 devx_umem_reg_cmd_build(dev, obj, &cmd);
2158
2159 MLX5_SET(create_umem_in, cmd.in, uid, c->devx_uid);
2160 err = mlx5_cmd_exec(dev->mdev, cmd.in, cmd.inlen, cmd.out,
2161 sizeof(cmd.out));
2162 if (err)
2163 goto err_umem_release;
2164
2165 obj->mdev = dev->mdev;
2166 uobj->object = obj;
2167 devx_obj_build_destroy_cmd(cmd.in, cmd.out, obj->dinbox, &obj->dinlen, &obj_id);
2168 uverbs_finalize_uobj_create(attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE);
2169
2170 err = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_OUT_ID, &obj_id,
2171 sizeof(obj_id));
2172 return err;
2173
2174err_umem_release:
2175 ib_umem_release(obj->umem);
2176err_obj_free:
2177 kfree(obj);
2178 return err;
2179}
2180
2181static int devx_umem_cleanup(struct ib_uobject *uobject,
2182 enum rdma_remove_reason why,
2183 struct uverbs_attr_bundle *attrs)
2184{
2185 struct devx_umem *obj = uobject->object;
2186 u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
2187 int err;
2188
2189 err = mlx5_cmd_exec(obj->mdev, obj->dinbox, obj->dinlen, out, sizeof(out));
2190 if (ib_is_destroy_retryable(err, why, uobject))
2191 return err;
2192
2193 ib_umem_release(obj->umem);
2194 kfree(obj);
2195 return 0;
2196}
2197
2198static bool is_unaffiliated_event(struct mlx5_core_dev *dev,
2199 unsigned long event_type)
2200{
2201 __be64 *unaff_events;
2202 int mask_entry;
2203 int mask_bit;
2204
2205 if (!MLX5_CAP_GEN(dev, event_cap))
2206 return is_legacy_unaffiliated_event_num(event_type);
2207
2208 unaff_events = MLX5_CAP_DEV_EVENT(dev,
2209 user_unaffiliated_events);
2210 WARN_ON(event_type > MAX_SUPP_EVENT_NUM);
2211
2212 mask_entry = event_type / 64;
2213 mask_bit = event_type % 64;
2214
2215 if (!(be64_to_cpu(unaff_events[mask_entry]) & (1ull << mask_bit)))
2216 return false;
2217
2218 return true;
2219}
2220
2221static u32 devx_get_obj_id_from_event(unsigned long event_type, void *data)
2222{
2223 struct mlx5_eqe *eqe = data;
2224 u32 obj_id = 0;
2225
2226 switch (event_type) {
2227 case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR:
2228 case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT:
2229 case MLX5_EVENT_TYPE_PATH_MIG:
2230 case MLX5_EVENT_TYPE_COMM_EST:
2231 case MLX5_EVENT_TYPE_SQ_DRAINED:
2232 case MLX5_EVENT_TYPE_SRQ_LAST_WQE:
2233 case MLX5_EVENT_TYPE_WQ_CATAS_ERROR:
2234 case MLX5_EVENT_TYPE_PATH_MIG_FAILED:
2235 case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
2236 case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR:
2237 obj_id = be32_to_cpu(eqe->data.qp_srq.qp_srq_n) & 0xffffff;
2238 break;
2239 case MLX5_EVENT_TYPE_XRQ_ERROR:
2240 obj_id = be32_to_cpu(eqe->data.xrq_err.type_xrqn) & 0xffffff;
2241 break;
2242 case MLX5_EVENT_TYPE_DCT_DRAINED:
2243 case MLX5_EVENT_TYPE_DCT_KEY_VIOLATION:
2244 obj_id = be32_to_cpu(eqe->data.dct.dctn) & 0xffffff;
2245 break;
2246 case MLX5_EVENT_TYPE_CQ_ERROR:
2247 obj_id = be32_to_cpu(eqe->data.cq_err.cqn) & 0xffffff;
2248 break;
2249 default:
2250 obj_id = MLX5_GET(affiliated_event_header, &eqe->data, obj_id);
2251 break;
2252 }
2253
2254 return obj_id;
2255}
2256
2257static int deliver_event(struct devx_event_subscription *event_sub,
2258 const void *data)
2259{
2260 struct devx_async_event_file *ev_file;
2261 struct devx_async_event_data *event_data;
2262 unsigned long flags;
2263
2264 ev_file = event_sub->ev_file;
2265
2266 if (ev_file->omit_data) {
2267 spin_lock_irqsave(&ev_file->lock, flags);
2268 if (!list_empty(&event_sub->event_list) ||
2269 ev_file->is_destroyed) {
2270 spin_unlock_irqrestore(&ev_file->lock, flags);
2271 return 0;
2272 }
2273
2274 list_add_tail(&event_sub->event_list, &ev_file->event_list);
2275 spin_unlock_irqrestore(&ev_file->lock, flags);
2276 wake_up_interruptible(&ev_file->poll_wait);
2277 return 0;
2278 }
2279
2280 event_data = kzalloc(sizeof(*event_data) + sizeof(struct mlx5_eqe),
2281 GFP_ATOMIC);
2282 if (!event_data) {
2283 spin_lock_irqsave(&ev_file->lock, flags);
2284 ev_file->is_overflow_err = 1;
2285 spin_unlock_irqrestore(&ev_file->lock, flags);
2286 return -ENOMEM;
2287 }
2288
2289 event_data->hdr.cookie = event_sub->cookie;
2290 memcpy(event_data->hdr.out_data, data, sizeof(struct mlx5_eqe));
2291
2292 spin_lock_irqsave(&ev_file->lock, flags);
2293 if (!ev_file->is_destroyed)
2294 list_add_tail(&event_data->list, &ev_file->event_list);
2295 else
2296 kfree(event_data);
2297 spin_unlock_irqrestore(&ev_file->lock, flags);
2298 wake_up_interruptible(&ev_file->poll_wait);
2299
2300 return 0;
2301}
2302
2303static void dispatch_event_fd(struct list_head *fd_list,
2304 const void *data)
2305{
2306 struct devx_event_subscription *item;
2307
2308 list_for_each_entry_rcu(item, fd_list, xa_list) {
2309 if (item->eventfd)
2310 eventfd_signal(item->eventfd, 1);
2311 else
2312 deliver_event(item, data);
2313 }
2314}
2315
2316static int devx_event_notifier(struct notifier_block *nb,
2317 unsigned long event_type, void *data)
2318{
2319 struct mlx5_devx_event_table *table;
2320 struct mlx5_ib_dev *dev;
2321 struct devx_event *event;
2322 struct devx_obj_event *obj_event;
2323 u16 obj_type = 0;
2324 bool is_unaffiliated;
2325 u32 obj_id;
2326
2327 /* Explicit filtering to kernel events which may occur frequently */
2328 if (event_type == MLX5_EVENT_TYPE_CMD ||
2329 event_type == MLX5_EVENT_TYPE_PAGE_REQUEST)
2330 return NOTIFY_OK;
2331
2332 table = container_of(nb, struct mlx5_devx_event_table, devx_nb.nb);
2333 dev = container_of(table, struct mlx5_ib_dev, devx_event_table);
2334 is_unaffiliated = is_unaffiliated_event(dev->mdev, event_type);
2335
2336 if (!is_unaffiliated)
2337 obj_type = get_event_obj_type(event_type, data);
2338
2339 rcu_read_lock();
2340 event = xa_load(&table->event_xa, event_type | (obj_type << 16));
2341 if (!event) {
2342 rcu_read_unlock();
2343 return NOTIFY_DONE;
2344 }
2345
2346 if (is_unaffiliated) {
2347 dispatch_event_fd(&event->unaffiliated_list, data);
2348 rcu_read_unlock();
2349 return NOTIFY_OK;
2350 }
2351
2352 obj_id = devx_get_obj_id_from_event(event_type, data);
2353 obj_event = xa_load(&event->object_ids, obj_id);
2354 if (!obj_event) {
2355 rcu_read_unlock();
2356 return NOTIFY_DONE;
2357 }
2358
2359 dispatch_event_fd(&obj_event->obj_sub_list, data);
2360
2361 rcu_read_unlock();
2362 return NOTIFY_OK;
2363}
2364
2365int mlx5_ib_devx_init(struct mlx5_ib_dev *dev)
2366{
2367 struct mlx5_devx_event_table *table = &dev->devx_event_table;
2368 int uid;
2369
2370 uid = mlx5_ib_devx_create(dev, false);
2371 if (uid > 0) {
2372 dev->devx_whitelist_uid = uid;
2373 xa_init(&table->event_xa);
2374 mutex_init(&table->event_xa_lock);
2375 MLX5_NB_INIT(&table->devx_nb, devx_event_notifier, NOTIFY_ANY);
2376 mlx5_eq_notifier_register(dev->mdev, &table->devx_nb);
2377 }
2378
2379 return 0;
2380}
2381
2382void mlx5_ib_devx_cleanup(struct mlx5_ib_dev *dev)
2383{
2384 struct mlx5_devx_event_table *table = &dev->devx_event_table;
2385 struct devx_event_subscription *sub, *tmp;
2386 struct devx_event *event;
2387 void *entry;
2388 unsigned long id;
2389
2390 if (dev->devx_whitelist_uid) {
2391 mlx5_eq_notifier_unregister(dev->mdev, &table->devx_nb);
2392 mutex_lock(&dev->devx_event_table.event_xa_lock);
2393 xa_for_each(&table->event_xa, id, entry) {
2394 event = entry;
2395 list_for_each_entry_safe(
2396 sub, tmp, &event->unaffiliated_list, xa_list)
2397 devx_cleanup_subscription(dev, sub);
2398 kfree(entry);
2399 }
2400 mutex_unlock(&dev->devx_event_table.event_xa_lock);
2401 xa_destroy(&table->event_xa);
2402
2403 mlx5_ib_devx_destroy(dev, dev->devx_whitelist_uid);
2404 }
2405}
2406
2407static ssize_t devx_async_cmd_event_read(struct file *filp, char __user *buf,
2408 size_t count, loff_t *pos)
2409{
2410 struct devx_async_cmd_event_file *comp_ev_file = filp->private_data;
2411 struct devx_async_event_queue *ev_queue = &comp_ev_file->ev_queue;
2412 struct devx_async_data *event;
2413 int ret = 0;
2414 size_t eventsz;
2415
2416 spin_lock_irq(&ev_queue->lock);
2417
2418 while (list_empty(&ev_queue->event_list)) {
2419 spin_unlock_irq(&ev_queue->lock);
2420
2421 if (filp->f_flags & O_NONBLOCK)
2422 return -EAGAIN;
2423
2424 if (wait_event_interruptible(
2425 ev_queue->poll_wait,
2426 (!list_empty(&ev_queue->event_list) ||
2427 ev_queue->is_destroyed))) {
2428 return -ERESTARTSYS;
2429 }
2430
2431 spin_lock_irq(&ev_queue->lock);
2432 if (ev_queue->is_destroyed) {
2433 spin_unlock_irq(&ev_queue->lock);
2434 return -EIO;
2435 }
2436 }
2437
2438 event = list_entry(ev_queue->event_list.next,
2439 struct devx_async_data, list);
2440 eventsz = event->cmd_out_len +
2441 sizeof(struct mlx5_ib_uapi_devx_async_cmd_hdr);
2442
2443 if (eventsz > count) {
2444 spin_unlock_irq(&ev_queue->lock);
2445 return -ENOSPC;
2446 }
2447
2448 list_del(ev_queue->event_list.next);
2449 spin_unlock_irq(&ev_queue->lock);
2450
2451 if (copy_to_user(buf, &event->hdr, eventsz))
2452 ret = -EFAULT;
2453 else
2454 ret = eventsz;
2455
2456 atomic_sub(event->cmd_out_len, &ev_queue->bytes_in_use);
2457 kvfree(event);
2458 return ret;
2459}
2460
2461static __poll_t devx_async_cmd_event_poll(struct file *filp,
2462 struct poll_table_struct *wait)
2463{
2464 struct devx_async_cmd_event_file *comp_ev_file = filp->private_data;
2465 struct devx_async_event_queue *ev_queue = &comp_ev_file->ev_queue;
2466 __poll_t pollflags = 0;
2467
2468 poll_wait(filp, &ev_queue->poll_wait, wait);
2469
2470 spin_lock_irq(&ev_queue->lock);
2471 if (ev_queue->is_destroyed)
2472 pollflags = EPOLLIN | EPOLLRDNORM | EPOLLRDHUP;
2473 else if (!list_empty(&ev_queue->event_list))
2474 pollflags = EPOLLIN | EPOLLRDNORM;
2475 spin_unlock_irq(&ev_queue->lock);
2476
2477 return pollflags;
2478}
2479
2480static const struct file_operations devx_async_cmd_event_fops = {
2481 .owner = THIS_MODULE,
2482 .read = devx_async_cmd_event_read,
2483 .poll = devx_async_cmd_event_poll,
2484 .release = uverbs_uobject_fd_release,
2485 .llseek = no_llseek,
2486};
2487
2488static ssize_t devx_async_event_read(struct file *filp, char __user *buf,
2489 size_t count, loff_t *pos)
2490{
2491 struct devx_async_event_file *ev_file = filp->private_data;
2492 struct devx_event_subscription *event_sub;
2493 struct devx_async_event_data *event;
2494 int ret = 0;
2495 size_t eventsz;
2496 bool omit_data;
2497 void *event_data;
2498
2499 omit_data = ev_file->omit_data;
2500
2501 spin_lock_irq(&ev_file->lock);
2502
2503 if (ev_file->is_overflow_err) {
2504 ev_file->is_overflow_err = 0;
2505 spin_unlock_irq(&ev_file->lock);
2506 return -EOVERFLOW;
2507 }
2508
2509
2510 while (list_empty(&ev_file->event_list)) {
2511 spin_unlock_irq(&ev_file->lock);
2512
2513 if (filp->f_flags & O_NONBLOCK)
2514 return -EAGAIN;
2515
2516 if (wait_event_interruptible(ev_file->poll_wait,
2517 (!list_empty(&ev_file->event_list) ||
2518 ev_file->is_destroyed))) {
2519 return -ERESTARTSYS;
2520 }
2521
2522 spin_lock_irq(&ev_file->lock);
2523 if (ev_file->is_destroyed) {
2524 spin_unlock_irq(&ev_file->lock);
2525 return -EIO;
2526 }
2527 }
2528
2529 if (omit_data) {
2530 event_sub = list_first_entry(&ev_file->event_list,
2531 struct devx_event_subscription,
2532 event_list);
2533 eventsz = sizeof(event_sub->cookie);
2534 event_data = &event_sub->cookie;
2535 } else {
2536 event = list_first_entry(&ev_file->event_list,
2537 struct devx_async_event_data, list);
2538 eventsz = sizeof(struct mlx5_eqe) +
2539 sizeof(struct mlx5_ib_uapi_devx_async_event_hdr);
2540 event_data = &event->hdr;
2541 }
2542
2543 if (eventsz > count) {
2544 spin_unlock_irq(&ev_file->lock);
2545 return -EINVAL;
2546 }
2547
2548 if (omit_data)
2549 list_del_init(&event_sub->event_list);
2550 else
2551 list_del(&event->list);
2552
2553 spin_unlock_irq(&ev_file->lock);
2554
2555 if (copy_to_user(buf, event_data, eventsz))
2556 /* This points to an application issue, not a kernel concern */
2557 ret = -EFAULT;
2558 else
2559 ret = eventsz;
2560
2561 if (!omit_data)
2562 kfree(event);
2563 return ret;
2564}
2565
2566static __poll_t devx_async_event_poll(struct file *filp,
2567 struct poll_table_struct *wait)
2568{
2569 struct devx_async_event_file *ev_file = filp->private_data;
2570 __poll_t pollflags = 0;
2571
2572 poll_wait(filp, &ev_file->poll_wait, wait);
2573
2574 spin_lock_irq(&ev_file->lock);
2575 if (ev_file->is_destroyed)
2576 pollflags = EPOLLIN | EPOLLRDNORM | EPOLLRDHUP;
2577 else if (!list_empty(&ev_file->event_list))
2578 pollflags = EPOLLIN | EPOLLRDNORM;
2579 spin_unlock_irq(&ev_file->lock);
2580
2581 return pollflags;
2582}
2583
2584static void devx_free_subscription(struct rcu_head *rcu)
2585{
2586 struct devx_event_subscription *event_sub =
2587 container_of(rcu, struct devx_event_subscription, rcu);
2588
2589 if (event_sub->eventfd)
2590 eventfd_ctx_put(event_sub->eventfd);
2591 uverbs_uobject_put(&event_sub->ev_file->uobj);
2592 kfree(event_sub);
2593}
2594
2595static const struct file_operations devx_async_event_fops = {
2596 .owner = THIS_MODULE,
2597 .read = devx_async_event_read,
2598 .poll = devx_async_event_poll,
2599 .release = uverbs_uobject_fd_release,
2600 .llseek = no_llseek,
2601};
2602
2603static int devx_async_cmd_event_destroy_uobj(struct ib_uobject *uobj,
2604 enum rdma_remove_reason why)
2605{
2606 struct devx_async_cmd_event_file *comp_ev_file =
2607 container_of(uobj, struct devx_async_cmd_event_file,
2608 uobj);
2609 struct devx_async_event_queue *ev_queue = &comp_ev_file->ev_queue;
2610 struct devx_async_data *entry, *tmp;
2611
2612 spin_lock_irq(&ev_queue->lock);
2613 ev_queue->is_destroyed = 1;
2614 spin_unlock_irq(&ev_queue->lock);
2615 wake_up_interruptible(&ev_queue->poll_wait);
2616
2617 mlx5_cmd_cleanup_async_ctx(&comp_ev_file->async_ctx);
2618
2619 spin_lock_irq(&comp_ev_file->ev_queue.lock);
2620 list_for_each_entry_safe(entry, tmp,
2621 &comp_ev_file->ev_queue.event_list, list) {
2622 list_del(&entry->list);
2623 kvfree(entry);
2624 }
2625 spin_unlock_irq(&comp_ev_file->ev_queue.lock);
2626 return 0;
2627};
2628
2629static int devx_async_event_destroy_uobj(struct ib_uobject *uobj,
2630 enum rdma_remove_reason why)
2631{
2632 struct devx_async_event_file *ev_file =
2633 container_of(uobj, struct devx_async_event_file,
2634 uobj);
2635 struct devx_event_subscription *event_sub, *event_sub_tmp;
2636 struct mlx5_ib_dev *dev = ev_file->dev;
2637
2638 spin_lock_irq(&ev_file->lock);
2639 ev_file->is_destroyed = 1;
2640
2641 /* free the pending events allocation */
2642 if (ev_file->omit_data) {
2643 struct devx_event_subscription *event_sub, *tmp;
2644
2645 list_for_each_entry_safe(event_sub, tmp, &ev_file->event_list,
2646 event_list)
2647 list_del_init(&event_sub->event_list);
2648
2649 } else {
2650 struct devx_async_event_data *entry, *tmp;
2651
2652 list_for_each_entry_safe(entry, tmp, &ev_file->event_list,
2653 list) {
2654 list_del(&entry->list);
2655 kfree(entry);
2656 }
2657 }
2658
2659 spin_unlock_irq(&ev_file->lock);
2660 wake_up_interruptible(&ev_file->poll_wait);
2661
2662 mutex_lock(&dev->devx_event_table.event_xa_lock);
2663 /* delete the subscriptions which are related to this FD */
2664 list_for_each_entry_safe(event_sub, event_sub_tmp,
2665 &ev_file->subscribed_events_list, file_list) {
2666 devx_cleanup_subscription(dev, event_sub);
2667 list_del_rcu(&event_sub->file_list);
2668 /* subscription may not be used by the read API any more */
2669 call_rcu(&event_sub->rcu, devx_free_subscription);
2670 }
2671 mutex_unlock(&dev->devx_event_table.event_xa_lock);
2672
2673 put_device(&dev->ib_dev.dev);
2674 return 0;
2675};
2676
2677DECLARE_UVERBS_NAMED_METHOD(
2678 MLX5_IB_METHOD_DEVX_UMEM_REG,
2679 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE,
2680 MLX5_IB_OBJECT_DEVX_UMEM,
2681 UVERBS_ACCESS_NEW,
2682 UA_MANDATORY),
2683 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_ADDR,
2684 UVERBS_ATTR_TYPE(u64),
2685 UA_MANDATORY),
2686 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_LEN,
2687 UVERBS_ATTR_TYPE(u64),
2688 UA_MANDATORY),
2689 UVERBS_ATTR_FLAGS_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_ACCESS,
2690 enum ib_access_flags),
2691 UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_DEVX_UMEM_REG_OUT_ID,
2692 UVERBS_ATTR_TYPE(u32),
2693 UA_MANDATORY));
2694
2695DECLARE_UVERBS_NAMED_METHOD_DESTROY(
2696 MLX5_IB_METHOD_DEVX_UMEM_DEREG,
2697 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_UMEM_DEREG_HANDLE,
2698 MLX5_IB_OBJECT_DEVX_UMEM,
2699 UVERBS_ACCESS_DESTROY,
2700 UA_MANDATORY));
2701
2702DECLARE_UVERBS_NAMED_METHOD(
2703 MLX5_IB_METHOD_DEVX_QUERY_EQN,
2704 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_QUERY_EQN_USER_VEC,
2705 UVERBS_ATTR_TYPE(u32),
2706 UA_MANDATORY),
2707 UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_DEVX_QUERY_EQN_DEV_EQN,
2708 UVERBS_ATTR_TYPE(u32),
2709 UA_MANDATORY));
2710
2711DECLARE_UVERBS_NAMED_METHOD(
2712 MLX5_IB_METHOD_DEVX_QUERY_UAR,
2713 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_QUERY_UAR_USER_IDX,
2714 UVERBS_ATTR_TYPE(u32),
2715 UA_MANDATORY),
2716 UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_DEVX_QUERY_UAR_DEV_IDX,
2717 UVERBS_ATTR_TYPE(u32),
2718 UA_MANDATORY));
2719
2720DECLARE_UVERBS_NAMED_METHOD(
2721 MLX5_IB_METHOD_DEVX_OTHER,
2722 UVERBS_ATTR_PTR_IN(
2723 MLX5_IB_ATTR_DEVX_OTHER_CMD_IN,
2724 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2725 UA_MANDATORY,
2726 UA_ALLOC_AND_COPY),
2727 UVERBS_ATTR_PTR_OUT(
2728 MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT,
2729 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
2730 UA_MANDATORY));
2731
2732DECLARE_UVERBS_NAMED_METHOD(
2733 MLX5_IB_METHOD_DEVX_OBJ_CREATE,
2734 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_CREATE_HANDLE,
2735 MLX5_IB_OBJECT_DEVX_OBJ,
2736 UVERBS_ACCESS_NEW,
2737 UA_MANDATORY),
2738 UVERBS_ATTR_PTR_IN(
2739 MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN,
2740 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2741 UA_MANDATORY,
2742 UA_ALLOC_AND_COPY),
2743 UVERBS_ATTR_PTR_OUT(
2744 MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT,
2745 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
2746 UA_MANDATORY));
2747
2748DECLARE_UVERBS_NAMED_METHOD_DESTROY(
2749 MLX5_IB_METHOD_DEVX_OBJ_DESTROY,
2750 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_DESTROY_HANDLE,
2751 MLX5_IB_OBJECT_DEVX_OBJ,
2752 UVERBS_ACCESS_DESTROY,
2753 UA_MANDATORY));
2754
2755DECLARE_UVERBS_NAMED_METHOD(
2756 MLX5_IB_METHOD_DEVX_OBJ_MODIFY,
2757 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_MODIFY_HANDLE,
2758 UVERBS_IDR_ANY_OBJECT,
2759 UVERBS_ACCESS_WRITE,
2760 UA_MANDATORY),
2761 UVERBS_ATTR_PTR_IN(
2762 MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN,
2763 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2764 UA_MANDATORY,
2765 UA_ALLOC_AND_COPY),
2766 UVERBS_ATTR_PTR_OUT(
2767 MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT,
2768 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
2769 UA_MANDATORY));
2770
2771DECLARE_UVERBS_NAMED_METHOD(
2772 MLX5_IB_METHOD_DEVX_OBJ_QUERY,
2773 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_QUERY_HANDLE,
2774 UVERBS_IDR_ANY_OBJECT,
2775 UVERBS_ACCESS_READ,
2776 UA_MANDATORY),
2777 UVERBS_ATTR_PTR_IN(
2778 MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN,
2779 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2780 UA_MANDATORY,
2781 UA_ALLOC_AND_COPY),
2782 UVERBS_ATTR_PTR_OUT(
2783 MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT,
2784 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
2785 UA_MANDATORY));
2786
2787DECLARE_UVERBS_NAMED_METHOD(
2788 MLX5_IB_METHOD_DEVX_OBJ_ASYNC_QUERY,
2789 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_QUERY_HANDLE,
2790 UVERBS_IDR_ANY_OBJECT,
2791 UVERBS_ACCESS_READ,
2792 UA_MANDATORY),
2793 UVERBS_ATTR_PTR_IN(
2794 MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN,
2795 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2796 UA_MANDATORY,
2797 UA_ALLOC_AND_COPY),
2798 UVERBS_ATTR_CONST_IN(MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_OUT_LEN,
2799 u16, UA_MANDATORY),
2800 UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_FD,
2801 MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
2802 UVERBS_ACCESS_READ,
2803 UA_MANDATORY),
2804 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_WR_ID,
2805 UVERBS_ATTR_TYPE(u64),
2806 UA_MANDATORY));
2807
2808DECLARE_UVERBS_NAMED_METHOD(
2809 MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT,
2810 UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_HANDLE,
2811 MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
2812 UVERBS_ACCESS_READ,
2813 UA_MANDATORY),
2814 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_OBJ_HANDLE,
2815 MLX5_IB_OBJECT_DEVX_OBJ,
2816 UVERBS_ACCESS_READ,
2817 UA_OPTIONAL),
2818 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_TYPE_NUM_LIST,
2819 UVERBS_ATTR_MIN_SIZE(sizeof(u16)),
2820 UA_MANDATORY,
2821 UA_ALLOC_AND_COPY),
2822 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_COOKIE,
2823 UVERBS_ATTR_TYPE(u64),
2824 UA_OPTIONAL),
2825 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_NUM,
2826 UVERBS_ATTR_TYPE(u32),
2827 UA_OPTIONAL));
2828
2829DECLARE_UVERBS_GLOBAL_METHODS(MLX5_IB_OBJECT_DEVX,
2830 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OTHER),
2831 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_QUERY_UAR),
2832 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_QUERY_EQN),
2833 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT));
2834
2835DECLARE_UVERBS_NAMED_OBJECT(MLX5_IB_OBJECT_DEVX_OBJ,
2836 UVERBS_TYPE_ALLOC_IDR(devx_obj_cleanup),
2837 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_CREATE),
2838 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_DESTROY),
2839 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_MODIFY),
2840 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_QUERY),
2841 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_ASYNC_QUERY));
2842
2843DECLARE_UVERBS_NAMED_OBJECT(MLX5_IB_OBJECT_DEVX_UMEM,
2844 UVERBS_TYPE_ALLOC_IDR(devx_umem_cleanup),
2845 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_UMEM_REG),
2846 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_UMEM_DEREG));
2847
2848
2849DECLARE_UVERBS_NAMED_METHOD(
2850 MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC,
2851 UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_ASYNC_CMD_FD_ALLOC_HANDLE,
2852 MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
2853 UVERBS_ACCESS_NEW,
2854 UA_MANDATORY));
2855
2856DECLARE_UVERBS_NAMED_OBJECT(
2857 MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
2858 UVERBS_TYPE_ALLOC_FD(sizeof(struct devx_async_cmd_event_file),
2859 devx_async_cmd_event_destroy_uobj,
2860 &devx_async_cmd_event_fops, "[devx_async_cmd]",
2861 O_RDONLY),
2862 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC));
2863
2864DECLARE_UVERBS_NAMED_METHOD(
2865 MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC,
2866 UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_HANDLE,
2867 MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
2868 UVERBS_ACCESS_NEW,
2869 UA_MANDATORY),
2870 UVERBS_ATTR_FLAGS_IN(MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_FLAGS,
2871 enum mlx5_ib_uapi_devx_create_event_channel_flags,
2872 UA_MANDATORY));
2873
2874DECLARE_UVERBS_NAMED_OBJECT(
2875 MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
2876 UVERBS_TYPE_ALLOC_FD(sizeof(struct devx_async_event_file),
2877 devx_async_event_destroy_uobj,
2878 &devx_async_event_fops, "[devx_async_event]",
2879 O_RDONLY),
2880 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC));
2881
2882static bool devx_is_supported(struct ib_device *device)
2883{
2884 struct mlx5_ib_dev *dev = to_mdev(device);
2885
2886 return MLX5_CAP_GEN(dev->mdev, log_max_uctx);
2887}
2888
2889const struct uapi_definition mlx5_ib_devx_defs[] = {
2890 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
2891 MLX5_IB_OBJECT_DEVX,
2892 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
2893 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
2894 MLX5_IB_OBJECT_DEVX_OBJ,
2895 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
2896 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
2897 MLX5_IB_OBJECT_DEVX_UMEM,
2898 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
2899 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
2900 MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
2901 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
2902 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
2903 MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
2904 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
2905 {},
2906};