1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
2 /*
3 * Copyright (c) 2018, Mellanox Technologies inc. All rights reserved.
4 */
5
6 #include <rdma/ib_user_verbs.h>
7 #include <rdma/ib_verbs.h>
8 #include <rdma/uverbs_types.h>
9 #include <rdma/uverbs_ioctl.h>
10 #include <rdma/mlx5_user_ioctl_cmds.h>
11 #include <rdma/mlx5_user_ioctl_verbs.h>
12 #include <rdma/ib_umem.h>
13 #include <rdma/uverbs_std_types.h>
14 #include <linux/mlx5/driver.h>
15 #include <linux/mlx5/fs.h>
16 #include "mlx5_ib.h"
17 #include "devx.h"
18 #include "qp.h"
19 #include <linux/xarray.h>
20
21 #define UVERBS_MODULE_NAME mlx5_ib
22 #include <rdma/uverbs_named_ioctl.h>
23
24 static void dispatch_event_fd(struct list_head *fd_list, const void *data);
25
26 enum devx_obj_flags {
27 DEVX_OBJ_FLAGS_INDIRECT_MKEY = 1 << 0,
28 DEVX_OBJ_FLAGS_DCT = 1 << 1,
29 DEVX_OBJ_FLAGS_CQ = 1 << 2,
30 };
31
32 struct devx_async_data {
33 struct mlx5_ib_dev *mdev;
34 struct list_head list;
35 struct devx_async_cmd_event_file *ev_file;
36 struct mlx5_async_work cb_work;
37 u16 cmd_out_len;
38 /* must be last field in this structure */
39 struct mlx5_ib_uapi_devx_async_cmd_hdr hdr;
40 };
41
42 struct devx_async_event_data {
43 struct list_head list; /* headed in ev_file->event_list */
44 struct mlx5_ib_uapi_devx_async_event_hdr hdr;
45 };
46
47 /* first level XA value data structure */
48 struct devx_event {
49 struct xarray object_ids; /* second XA level, Key = object id */
50 struct list_head unaffiliated_list;
51 };
52
53 /* second level XA value data structure */
54 struct devx_obj_event {
55 struct rcu_head rcu;
56 struct list_head obj_sub_list;
57 };
58
59 struct devx_event_subscription {
60 struct list_head file_list; /* headed in ev_file->
61 * subscribed_events_list
62 */
63 struct list_head xa_list; /* headed in devx_event->unaffiliated_list or
64 * devx_obj_event->obj_sub_list
65 */
66 struct list_head obj_list; /* headed in devx_object */
67 struct list_head event_list; /* headed in ev_file->event_list or in
68 * temp list via subscription
69 */
70
71 u8 is_cleaned:1;
72 u32 xa_key_level1;
73 u32 xa_key_level2;
74 struct rcu_head rcu;
75 u64 cookie;
76 struct devx_async_event_file *ev_file;
77 struct eventfd_ctx *eventfd;
78 };
79
80 struct devx_async_event_file {
81 struct ib_uobject uobj;
82 /* Head of events that are subscribed to this FD */
83 struct list_head subscribed_events_list;
84 spinlock_t lock;
85 wait_queue_head_t poll_wait;
86 struct list_head event_list;
87 struct mlx5_ib_dev *dev;
88 u8 omit_data:1;
89 u8 is_overflow_err:1;
90 u8 is_destroyed:1;
91 };
92
93 struct devx_umem {
94 struct mlx5_core_dev *mdev;
95 struct ib_umem *umem;
96 u32 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
103 struct devx_umem_reg_cmd {
104 void *in;
105 u32 inlen;
106 u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
107 };
108
109 static struct mlx5_ib_ucontext *
devx_ufile2uctx(const struct uverbs_attr_bundle * attrs)110 devx_ufile2uctx(const struct uverbs_attr_bundle *attrs)
111 {
112 return to_mucontext(ib_uverbs_get_ucontext(attrs));
113 }
114
mlx5_ib_devx_create(struct mlx5_ib_dev * dev,bool is_user)115 int 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
mlx5_ib_devx_destroy(struct mlx5_ib_dev * dev,u16 uid)148 void 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
is_legacy_unaffiliated_event_num(u16 event_num)159 static 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
is_legacy_obj_event_num(u16 event_num)169 static 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
get_legacy_obj_type(u16 opcode)193 static 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
get_dec_obj_type(struct devx_obj * obj,u16 event_num)209 static 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
get_event_obj_type(unsigned long event_type,struct mlx5_eqe * eqe)254 static 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
get_dec_obj_id(u64 obj_id)279 static 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 */
get_enc_obj_id(u32 opcode,u32 obj_id)289 static u64 get_enc_obj_id(u32 opcode, u32 obj_id)
290 {
291 return ((u64)opcode << 32) | obj_id;
292 }
293
devx_get_obj_id(const void * in)294 static 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
devx_is_valid_obj_id(struct uverbs_attr_bundle * attrs,struct ib_uobject * uobj,const void * in)520 static 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
563 if (qp->type == IB_QPT_RAW_PACKET ||
564 (qp->flags & IB_QP_CREATE_SOURCE_QPN)) {
565 struct mlx5_ib_raw_packet_qp *raw_packet_qp =
566 &qp->raw_packet_qp;
567 struct mlx5_ib_rq *rq = &raw_packet_qp->rq;
568 struct mlx5_ib_sq *sq = &raw_packet_qp->sq;
569
570 return (get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ,
571 rq->base.mqp.qpn) == obj_id ||
572 get_enc_obj_id(MLX5_CMD_OP_CREATE_SQ,
573 sq->base.mqp.qpn) == obj_id ||
574 get_enc_obj_id(MLX5_CMD_OP_CREATE_TIR,
575 rq->tirn) == obj_id ||
576 get_enc_obj_id(MLX5_CMD_OP_CREATE_TIS,
577 sq->tisn) == obj_id);
578 }
579
580 if (qp->type == MLX5_IB_QPT_DCT)
581 return get_enc_obj_id(MLX5_CMD_OP_CREATE_DCT,
582 qp->dct.mdct.mqp.qpn) == obj_id;
583 return get_enc_obj_id(MLX5_CMD_OP_CREATE_QP,
584 qp->ibqp.qp_num) == obj_id;
585 }
586
587 case UVERBS_OBJECT_WQ:
588 return get_enc_obj_id(MLX5_CMD_OP_CREATE_RQ,
589 to_mrwq(uobj->object)->core_qp.qpn) ==
590 obj_id;
591
592 case UVERBS_OBJECT_RWQ_IND_TBL:
593 return get_enc_obj_id(MLX5_CMD_OP_CREATE_RQT,
594 to_mrwq_ind_table(uobj->object)->rqtn) ==
595 obj_id;
596
597 case MLX5_IB_OBJECT_DEVX_OBJ:
598 return ((struct devx_obj *)uobj->object)->obj_id == obj_id;
599
600 default:
601 return false;
602 }
603 }
604
devx_set_umem_valid(const void * in)605 static void devx_set_umem_valid(const void *in)
606 {
607 u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
608
609 switch (opcode) {
610 case MLX5_CMD_OP_CREATE_MKEY:
611 MLX5_SET(create_mkey_in, in, mkey_umem_valid, 1);
612 break;
613 case MLX5_CMD_OP_CREATE_CQ:
614 {
615 void *cqc;
616
617 MLX5_SET(create_cq_in, in, cq_umem_valid, 1);
618 cqc = MLX5_ADDR_OF(create_cq_in, in, cq_context);
619 MLX5_SET(cqc, cqc, dbr_umem_valid, 1);
620 break;
621 }
622 case MLX5_CMD_OP_CREATE_QP:
623 {
624 void *qpc;
625
626 qpc = MLX5_ADDR_OF(create_qp_in, in, qpc);
627 MLX5_SET(qpc, qpc, dbr_umem_valid, 1);
628 MLX5_SET(create_qp_in, in, wq_umem_valid, 1);
629 break;
630 }
631
632 case MLX5_CMD_OP_CREATE_RQ:
633 {
634 void *rqc, *wq;
635
636 rqc = MLX5_ADDR_OF(create_rq_in, in, ctx);
637 wq = MLX5_ADDR_OF(rqc, rqc, wq);
638 MLX5_SET(wq, wq, dbr_umem_valid, 1);
639 MLX5_SET(wq, wq, wq_umem_valid, 1);
640 break;
641 }
642
643 case MLX5_CMD_OP_CREATE_SQ:
644 {
645 void *sqc, *wq;
646
647 sqc = MLX5_ADDR_OF(create_sq_in, in, ctx);
648 wq = MLX5_ADDR_OF(sqc, sqc, wq);
649 MLX5_SET(wq, wq, dbr_umem_valid, 1);
650 MLX5_SET(wq, wq, wq_umem_valid, 1);
651 break;
652 }
653
654 case MLX5_CMD_OP_MODIFY_CQ:
655 MLX5_SET(modify_cq_in, in, cq_umem_valid, 1);
656 break;
657
658 case MLX5_CMD_OP_CREATE_RMP:
659 {
660 void *rmpc, *wq;
661
662 rmpc = MLX5_ADDR_OF(create_rmp_in, in, ctx);
663 wq = MLX5_ADDR_OF(rmpc, rmpc, wq);
664 MLX5_SET(wq, wq, dbr_umem_valid, 1);
665 MLX5_SET(wq, wq, wq_umem_valid, 1);
666 break;
667 }
668
669 case MLX5_CMD_OP_CREATE_XRQ:
670 {
671 void *xrqc, *wq;
672
673 xrqc = MLX5_ADDR_OF(create_xrq_in, in, xrq_context);
674 wq = MLX5_ADDR_OF(xrqc, xrqc, wq);
675 MLX5_SET(wq, wq, dbr_umem_valid, 1);
676 MLX5_SET(wq, wq, wq_umem_valid, 1);
677 break;
678 }
679
680 case MLX5_CMD_OP_CREATE_XRC_SRQ:
681 {
682 void *xrc_srqc;
683
684 MLX5_SET(create_xrc_srq_in, in, xrc_srq_umem_valid, 1);
685 xrc_srqc = MLX5_ADDR_OF(create_xrc_srq_in, in,
686 xrc_srq_context_entry);
687 MLX5_SET(xrc_srqc, xrc_srqc, dbr_umem_valid, 1);
688 break;
689 }
690
691 default:
692 return;
693 }
694 }
695
devx_is_obj_create_cmd(const void * in,u16 * opcode)696 static bool devx_is_obj_create_cmd(const void *in, u16 *opcode)
697 {
698 *opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
699
700 switch (*opcode) {
701 case MLX5_CMD_OP_CREATE_GENERAL_OBJECT:
702 case MLX5_CMD_OP_CREATE_MKEY:
703 case MLX5_CMD_OP_CREATE_CQ:
704 case MLX5_CMD_OP_ALLOC_PD:
705 case MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN:
706 case MLX5_CMD_OP_CREATE_RMP:
707 case MLX5_CMD_OP_CREATE_SQ:
708 case MLX5_CMD_OP_CREATE_RQ:
709 case MLX5_CMD_OP_CREATE_RQT:
710 case MLX5_CMD_OP_CREATE_TIR:
711 case MLX5_CMD_OP_CREATE_TIS:
712 case MLX5_CMD_OP_ALLOC_Q_COUNTER:
713 case MLX5_CMD_OP_CREATE_FLOW_TABLE:
714 case MLX5_CMD_OP_CREATE_FLOW_GROUP:
715 case MLX5_CMD_OP_ALLOC_FLOW_COUNTER:
716 case MLX5_CMD_OP_ALLOC_PACKET_REFORMAT_CONTEXT:
717 case MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT:
718 case MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT:
719 case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
720 case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
721 case MLX5_CMD_OP_CREATE_QP:
722 case MLX5_CMD_OP_CREATE_SRQ:
723 case MLX5_CMD_OP_CREATE_XRC_SRQ:
724 case MLX5_CMD_OP_CREATE_DCT:
725 case MLX5_CMD_OP_CREATE_XRQ:
726 case MLX5_CMD_OP_ATTACH_TO_MCG:
727 case MLX5_CMD_OP_ALLOC_XRCD:
728 return true;
729 case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
730 {
731 u16 op_mod = MLX5_GET(set_fte_in, in, op_mod);
732 if (op_mod == 0)
733 return true;
734 return false;
735 }
736 case MLX5_CMD_OP_CREATE_PSV:
737 {
738 u8 num_psv = MLX5_GET(create_psv_in, in, num_psv);
739
740 if (num_psv == 1)
741 return true;
742 return false;
743 }
744 default:
745 return false;
746 }
747 }
748
devx_is_obj_modify_cmd(const void * in)749 static bool devx_is_obj_modify_cmd(const void *in)
750 {
751 u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
752
753 switch (opcode) {
754 case MLX5_CMD_OP_MODIFY_GENERAL_OBJECT:
755 case MLX5_CMD_OP_MODIFY_CQ:
756 case MLX5_CMD_OP_MODIFY_RMP:
757 case MLX5_CMD_OP_MODIFY_SQ:
758 case MLX5_CMD_OP_MODIFY_RQ:
759 case MLX5_CMD_OP_MODIFY_RQT:
760 case MLX5_CMD_OP_MODIFY_TIR:
761 case MLX5_CMD_OP_MODIFY_TIS:
762 case MLX5_CMD_OP_MODIFY_FLOW_TABLE:
763 case MLX5_CMD_OP_MODIFY_SCHEDULING_ELEMENT:
764 case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
765 case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
766 case MLX5_CMD_OP_RST2INIT_QP:
767 case MLX5_CMD_OP_INIT2RTR_QP:
768 case MLX5_CMD_OP_INIT2INIT_QP:
769 case MLX5_CMD_OP_RTR2RTS_QP:
770 case MLX5_CMD_OP_RTS2RTS_QP:
771 case MLX5_CMD_OP_SQERR2RTS_QP:
772 case MLX5_CMD_OP_2ERR_QP:
773 case MLX5_CMD_OP_2RST_QP:
774 case MLX5_CMD_OP_ARM_XRC_SRQ:
775 case MLX5_CMD_OP_ARM_RQ:
776 case MLX5_CMD_OP_ARM_DCT_FOR_KEY_VIOLATION:
777 case MLX5_CMD_OP_ARM_XRQ:
778 case MLX5_CMD_OP_SET_XRQ_DC_PARAMS_ENTRY:
779 case MLX5_CMD_OP_RELEASE_XRQ_ERROR:
780 case MLX5_CMD_OP_MODIFY_XRQ:
781 return true;
782 case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
783 {
784 u16 op_mod = MLX5_GET(set_fte_in, in, op_mod);
785
786 if (op_mod == 1)
787 return true;
788 return false;
789 }
790 default:
791 return false;
792 }
793 }
794
devx_is_obj_query_cmd(const void * in)795 static bool devx_is_obj_query_cmd(const void *in)
796 {
797 u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
798
799 switch (opcode) {
800 case MLX5_CMD_OP_QUERY_GENERAL_OBJECT:
801 case MLX5_CMD_OP_QUERY_MKEY:
802 case MLX5_CMD_OP_QUERY_CQ:
803 case MLX5_CMD_OP_QUERY_RMP:
804 case MLX5_CMD_OP_QUERY_SQ:
805 case MLX5_CMD_OP_QUERY_RQ:
806 case MLX5_CMD_OP_QUERY_RQT:
807 case MLX5_CMD_OP_QUERY_TIR:
808 case MLX5_CMD_OP_QUERY_TIS:
809 case MLX5_CMD_OP_QUERY_Q_COUNTER:
810 case MLX5_CMD_OP_QUERY_FLOW_TABLE:
811 case MLX5_CMD_OP_QUERY_FLOW_GROUP:
812 case MLX5_CMD_OP_QUERY_FLOW_TABLE_ENTRY:
813 case MLX5_CMD_OP_QUERY_FLOW_COUNTER:
814 case MLX5_CMD_OP_QUERY_MODIFY_HEADER_CONTEXT:
815 case MLX5_CMD_OP_QUERY_SCHEDULING_ELEMENT:
816 case MLX5_CMD_OP_QUERY_L2_TABLE_ENTRY:
817 case MLX5_CMD_OP_QUERY_QP:
818 case MLX5_CMD_OP_QUERY_SRQ:
819 case MLX5_CMD_OP_QUERY_XRC_SRQ:
820 case MLX5_CMD_OP_QUERY_DCT:
821 case MLX5_CMD_OP_QUERY_XRQ:
822 case MLX5_CMD_OP_QUERY_XRQ_DC_PARAMS_ENTRY:
823 case MLX5_CMD_OP_QUERY_XRQ_ERROR_PARAMS:
824 case MLX5_CMD_OP_QUERY_PACKET_REFORMAT_CONTEXT:
825 return true;
826 default:
827 return false;
828 }
829 }
830
devx_is_whitelist_cmd(void * in)831 static bool devx_is_whitelist_cmd(void *in)
832 {
833 u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
834
835 switch (opcode) {
836 case MLX5_CMD_OP_QUERY_HCA_CAP:
837 case MLX5_CMD_OP_QUERY_HCA_VPORT_CONTEXT:
838 case MLX5_CMD_OP_QUERY_ESW_VPORT_CONTEXT:
839 return true;
840 default:
841 return false;
842 }
843 }
844
devx_get_uid(struct mlx5_ib_ucontext * c,void * cmd_in)845 static int devx_get_uid(struct mlx5_ib_ucontext *c, void *cmd_in)
846 {
847 if (devx_is_whitelist_cmd(cmd_in)) {
848 struct mlx5_ib_dev *dev;
849
850 if (c->devx_uid)
851 return c->devx_uid;
852
853 dev = to_mdev(c->ibucontext.device);
854 if (dev->devx_whitelist_uid)
855 return dev->devx_whitelist_uid;
856
857 return -EOPNOTSUPP;
858 }
859
860 if (!c->devx_uid)
861 return -EINVAL;
862
863 return c->devx_uid;
864 }
865
devx_is_general_cmd(void * in,struct mlx5_ib_dev * dev)866 static bool devx_is_general_cmd(void *in, struct mlx5_ib_dev *dev)
867 {
868 u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
869
870 /* Pass all cmds for vhca_tunnel as general, tracking is done in FW */
871 if ((MLX5_CAP_GEN_64(dev->mdev, vhca_tunnel_commands) &&
872 MLX5_GET(general_obj_in_cmd_hdr, in, vhca_tunnel_id)) ||
873 (opcode >= MLX5_CMD_OP_GENERAL_START &&
874 opcode < MLX5_CMD_OP_GENERAL_END))
875 return true;
876
877 switch (opcode) {
878 case MLX5_CMD_OP_QUERY_HCA_CAP:
879 case MLX5_CMD_OP_QUERY_HCA_VPORT_CONTEXT:
880 case MLX5_CMD_OP_QUERY_ESW_VPORT_CONTEXT:
881 case MLX5_CMD_OP_QUERY_VPORT_STATE:
882 case MLX5_CMD_OP_QUERY_ADAPTER:
883 case MLX5_CMD_OP_QUERY_ISSI:
884 case MLX5_CMD_OP_QUERY_NIC_VPORT_CONTEXT:
885 case MLX5_CMD_OP_QUERY_ROCE_ADDRESS:
886 case MLX5_CMD_OP_QUERY_VNIC_ENV:
887 case MLX5_CMD_OP_QUERY_VPORT_COUNTER:
888 case MLX5_CMD_OP_GET_DROPPED_PACKET_LOG:
889 case MLX5_CMD_OP_NOP:
890 case MLX5_CMD_OP_QUERY_CONG_STATUS:
891 case MLX5_CMD_OP_QUERY_CONG_PARAMS:
892 case MLX5_CMD_OP_QUERY_CONG_STATISTICS:
893 case MLX5_CMD_OP_QUERY_LAG:
894 return true;
895 default:
896 return false;
897 }
898 }
899
UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_QUERY_EQN)900 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_QUERY_EQN)(
901 struct uverbs_attr_bundle *attrs)
902 {
903 struct mlx5_ib_ucontext *c;
904 struct mlx5_ib_dev *dev;
905 int user_vector;
906 int dev_eqn;
907 int err;
908
909 if (uverbs_copy_from(&user_vector, attrs,
910 MLX5_IB_ATTR_DEVX_QUERY_EQN_USER_VEC))
911 return -EFAULT;
912
913 c = devx_ufile2uctx(attrs);
914 if (IS_ERR(c))
915 return PTR_ERR(c);
916 dev = to_mdev(c->ibucontext.device);
917
918 err = mlx5_vector2eqn(dev->mdev, user_vector, &dev_eqn);
919 if (err < 0)
920 return err;
921
922 if (uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_QUERY_EQN_DEV_EQN,
923 &dev_eqn, sizeof(dev_eqn)))
924 return -EFAULT;
925
926 return 0;
927 }
928
929 /*
930 *Security note:
931 * The hardware protection mechanism works like this: Each device object that
932 * is subject to UAR doorbells (QP/SQ/CQ) gets a UAR ID (called uar_page in
933 * the device specification manual) upon its creation. Then upon doorbell,
934 * hardware fetches the object context for which the doorbell was rang, and
935 * validates that the UAR through which the DB was rang matches the UAR ID
936 * of the object.
937 * If no match the doorbell is silently ignored by the hardware. Of course,
938 * the user cannot ring a doorbell on a UAR that was not mapped to it.
939 * Now in devx, as the devx kernel does not manipulate the QP/SQ/CQ command
940 * mailboxes (except tagging them with UID), we expose to the user its UAR
941 * ID, so it can embed it in these objects in the expected specification
942 * format. So the only thing the user can do is hurt itself by creating a
943 * QP/SQ/CQ with a UAR ID other than his, and then in this case other users
944 * may ring a doorbell on its objects.
945 * The consequence of that will be that another user can schedule a QP/SQ
946 * of the buggy user for execution (just insert it to the hardware schedule
947 * queue or arm its CQ for event generation), no further harm is expected.
948 */
UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_QUERY_UAR)949 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_QUERY_UAR)(
950 struct uverbs_attr_bundle *attrs)
951 {
952 struct mlx5_ib_ucontext *c;
953 struct mlx5_ib_dev *dev;
954 u32 user_idx;
955 s32 dev_idx;
956
957 c = devx_ufile2uctx(attrs);
958 if (IS_ERR(c))
959 return PTR_ERR(c);
960 dev = to_mdev(c->ibucontext.device);
961
962 if (uverbs_copy_from(&user_idx, attrs,
963 MLX5_IB_ATTR_DEVX_QUERY_UAR_USER_IDX))
964 return -EFAULT;
965
966 dev_idx = bfregn_to_uar_index(dev, &c->bfregi, user_idx, true);
967 if (dev_idx < 0)
968 return dev_idx;
969
970 if (uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_QUERY_UAR_DEV_IDX,
971 &dev_idx, sizeof(dev_idx)))
972 return -EFAULT;
973
974 return 0;
975 }
976
UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OTHER)977 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OTHER)(
978 struct uverbs_attr_bundle *attrs)
979 {
980 struct mlx5_ib_ucontext *c;
981 struct mlx5_ib_dev *dev;
982 void *cmd_in = uverbs_attr_get_alloced_ptr(
983 attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_IN);
984 int cmd_out_len = uverbs_attr_get_len(attrs,
985 MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT);
986 void *cmd_out;
987 int err;
988 int uid;
989
990 c = devx_ufile2uctx(attrs);
991 if (IS_ERR(c))
992 return PTR_ERR(c);
993 dev = to_mdev(c->ibucontext.device);
994
995 uid = devx_get_uid(c, cmd_in);
996 if (uid < 0)
997 return uid;
998
999 /* Only white list of some general HCA commands are allowed for this method. */
1000 if (!devx_is_general_cmd(cmd_in, dev))
1001 return -EINVAL;
1002
1003 cmd_out = uverbs_zalloc(attrs, cmd_out_len);
1004 if (IS_ERR(cmd_out))
1005 return PTR_ERR(cmd_out);
1006
1007 MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1008 err = mlx5_cmd_exec(dev->mdev, cmd_in,
1009 uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_IN),
1010 cmd_out, cmd_out_len);
1011 if (err)
1012 return err;
1013
1014 return uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT, cmd_out,
1015 cmd_out_len);
1016 }
1017
devx_obj_build_destroy_cmd(void * in,void * out,void * din,u32 * dinlen,u32 * obj_id)1018 static void devx_obj_build_destroy_cmd(void *in, void *out, void *din,
1019 u32 *dinlen,
1020 u32 *obj_id)
1021 {
1022 u16 obj_type = MLX5_GET(general_obj_in_cmd_hdr, in, obj_type);
1023 u16 uid = MLX5_GET(general_obj_in_cmd_hdr, in, uid);
1024
1025 *obj_id = MLX5_GET(general_obj_out_cmd_hdr, out, obj_id);
1026 *dinlen = MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr);
1027
1028 MLX5_SET(general_obj_in_cmd_hdr, din, obj_id, *obj_id);
1029 MLX5_SET(general_obj_in_cmd_hdr, din, uid, uid);
1030
1031 switch (MLX5_GET(general_obj_in_cmd_hdr, in, opcode)) {
1032 case MLX5_CMD_OP_CREATE_GENERAL_OBJECT:
1033 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_GENERAL_OBJECT);
1034 MLX5_SET(general_obj_in_cmd_hdr, din, obj_type, obj_type);
1035 break;
1036
1037 case MLX5_CMD_OP_CREATE_UMEM:
1038 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1039 MLX5_CMD_OP_DESTROY_UMEM);
1040 break;
1041 case MLX5_CMD_OP_CREATE_MKEY:
1042 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_MKEY);
1043 break;
1044 case MLX5_CMD_OP_CREATE_CQ:
1045 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_CQ);
1046 break;
1047 case MLX5_CMD_OP_ALLOC_PD:
1048 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DEALLOC_PD);
1049 break;
1050 case MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN:
1051 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1052 MLX5_CMD_OP_DEALLOC_TRANSPORT_DOMAIN);
1053 break;
1054 case MLX5_CMD_OP_CREATE_RMP:
1055 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_RMP);
1056 break;
1057 case MLX5_CMD_OP_CREATE_SQ:
1058 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_SQ);
1059 break;
1060 case MLX5_CMD_OP_CREATE_RQ:
1061 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_RQ);
1062 break;
1063 case MLX5_CMD_OP_CREATE_RQT:
1064 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_RQT);
1065 break;
1066 case MLX5_CMD_OP_CREATE_TIR:
1067 *obj_id = MLX5_GET(create_tir_out, out, tirn);
1068 MLX5_SET(destroy_tir_in, din, opcode, MLX5_CMD_OP_DESTROY_TIR);
1069 MLX5_SET(destroy_tir_in, din, tirn, *obj_id);
1070 break;
1071 case MLX5_CMD_OP_CREATE_TIS:
1072 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_TIS);
1073 break;
1074 case MLX5_CMD_OP_ALLOC_Q_COUNTER:
1075 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1076 MLX5_CMD_OP_DEALLOC_Q_COUNTER);
1077 break;
1078 case MLX5_CMD_OP_CREATE_FLOW_TABLE:
1079 *dinlen = MLX5_ST_SZ_BYTES(destroy_flow_table_in);
1080 *obj_id = MLX5_GET(create_flow_table_out, out, table_id);
1081 MLX5_SET(destroy_flow_table_in, din, other_vport,
1082 MLX5_GET(create_flow_table_in, in, other_vport));
1083 MLX5_SET(destroy_flow_table_in, din, vport_number,
1084 MLX5_GET(create_flow_table_in, in, vport_number));
1085 MLX5_SET(destroy_flow_table_in, din, table_type,
1086 MLX5_GET(create_flow_table_in, in, table_type));
1087 MLX5_SET(destroy_flow_table_in, din, table_id, *obj_id);
1088 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1089 MLX5_CMD_OP_DESTROY_FLOW_TABLE);
1090 break;
1091 case MLX5_CMD_OP_CREATE_FLOW_GROUP:
1092 *dinlen = MLX5_ST_SZ_BYTES(destroy_flow_group_in);
1093 *obj_id = MLX5_GET(create_flow_group_out, out, group_id);
1094 MLX5_SET(destroy_flow_group_in, din, other_vport,
1095 MLX5_GET(create_flow_group_in, in, other_vport));
1096 MLX5_SET(destroy_flow_group_in, din, vport_number,
1097 MLX5_GET(create_flow_group_in, in, vport_number));
1098 MLX5_SET(destroy_flow_group_in, din, table_type,
1099 MLX5_GET(create_flow_group_in, in, table_type));
1100 MLX5_SET(destroy_flow_group_in, din, table_id,
1101 MLX5_GET(create_flow_group_in, in, table_id));
1102 MLX5_SET(destroy_flow_group_in, din, group_id, *obj_id);
1103 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1104 MLX5_CMD_OP_DESTROY_FLOW_GROUP);
1105 break;
1106 case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
1107 *dinlen = MLX5_ST_SZ_BYTES(delete_fte_in);
1108 *obj_id = MLX5_GET(set_fte_in, in, flow_index);
1109 MLX5_SET(delete_fte_in, din, other_vport,
1110 MLX5_GET(set_fte_in, in, other_vport));
1111 MLX5_SET(delete_fte_in, din, vport_number,
1112 MLX5_GET(set_fte_in, in, vport_number));
1113 MLX5_SET(delete_fte_in, din, table_type,
1114 MLX5_GET(set_fte_in, in, table_type));
1115 MLX5_SET(delete_fte_in, din, table_id,
1116 MLX5_GET(set_fte_in, in, table_id));
1117 MLX5_SET(delete_fte_in, din, flow_index, *obj_id);
1118 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1119 MLX5_CMD_OP_DELETE_FLOW_TABLE_ENTRY);
1120 break;
1121 case MLX5_CMD_OP_ALLOC_FLOW_COUNTER:
1122 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1123 MLX5_CMD_OP_DEALLOC_FLOW_COUNTER);
1124 break;
1125 case MLX5_CMD_OP_ALLOC_PACKET_REFORMAT_CONTEXT:
1126 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1127 MLX5_CMD_OP_DEALLOC_PACKET_REFORMAT_CONTEXT);
1128 break;
1129 case MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT:
1130 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1131 MLX5_CMD_OP_DEALLOC_MODIFY_HEADER_CONTEXT);
1132 break;
1133 case MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT:
1134 *dinlen = MLX5_ST_SZ_BYTES(destroy_scheduling_element_in);
1135 *obj_id = MLX5_GET(create_scheduling_element_out, out,
1136 scheduling_element_id);
1137 MLX5_SET(destroy_scheduling_element_in, din,
1138 scheduling_hierarchy,
1139 MLX5_GET(create_scheduling_element_in, in,
1140 scheduling_hierarchy));
1141 MLX5_SET(destroy_scheduling_element_in, din,
1142 scheduling_element_id, *obj_id);
1143 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1144 MLX5_CMD_OP_DESTROY_SCHEDULING_ELEMENT);
1145 break;
1146 case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
1147 *dinlen = MLX5_ST_SZ_BYTES(delete_vxlan_udp_dport_in);
1148 *obj_id = MLX5_GET(add_vxlan_udp_dport_in, in, vxlan_udp_port);
1149 MLX5_SET(delete_vxlan_udp_dport_in, din, vxlan_udp_port, *obj_id);
1150 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1151 MLX5_CMD_OP_DELETE_VXLAN_UDP_DPORT);
1152 break;
1153 case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
1154 *dinlen = MLX5_ST_SZ_BYTES(delete_l2_table_entry_in);
1155 *obj_id = MLX5_GET(set_l2_table_entry_in, in, table_index);
1156 MLX5_SET(delete_l2_table_entry_in, din, table_index, *obj_id);
1157 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1158 MLX5_CMD_OP_DELETE_L2_TABLE_ENTRY);
1159 break;
1160 case MLX5_CMD_OP_CREATE_QP:
1161 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_QP);
1162 break;
1163 case MLX5_CMD_OP_CREATE_SRQ:
1164 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_SRQ);
1165 break;
1166 case MLX5_CMD_OP_CREATE_XRC_SRQ:
1167 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1168 MLX5_CMD_OP_DESTROY_XRC_SRQ);
1169 break;
1170 case MLX5_CMD_OP_CREATE_DCT:
1171 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_DCT);
1172 break;
1173 case MLX5_CMD_OP_CREATE_XRQ:
1174 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DESTROY_XRQ);
1175 break;
1176 case MLX5_CMD_OP_ATTACH_TO_MCG:
1177 *dinlen = MLX5_ST_SZ_BYTES(detach_from_mcg_in);
1178 MLX5_SET(detach_from_mcg_in, din, qpn,
1179 MLX5_GET(attach_to_mcg_in, in, qpn));
1180 memcpy(MLX5_ADDR_OF(detach_from_mcg_in, din, multicast_gid),
1181 MLX5_ADDR_OF(attach_to_mcg_in, in, multicast_gid),
1182 MLX5_FLD_SZ_BYTES(attach_to_mcg_in, multicast_gid));
1183 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DETACH_FROM_MCG);
1184 break;
1185 case MLX5_CMD_OP_ALLOC_XRCD:
1186 MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DEALLOC_XRCD);
1187 break;
1188 case MLX5_CMD_OP_CREATE_PSV:
1189 MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
1190 MLX5_CMD_OP_DESTROY_PSV);
1191 MLX5_SET(destroy_psv_in, din, psvn,
1192 MLX5_GET(create_psv_out, out, psv0_index));
1193 break;
1194 default:
1195 /* The entry must match to one of the devx_is_obj_create_cmd */
1196 WARN_ON(true);
1197 break;
1198 }
1199 }
1200
devx_handle_mkey_indirect(struct devx_obj * obj,struct mlx5_ib_dev * dev,void * in,void * out)1201 static int devx_handle_mkey_indirect(struct devx_obj *obj,
1202 struct mlx5_ib_dev *dev,
1203 void *in, void *out)
1204 {
1205 struct mlx5_ib_devx_mr *devx_mr = &obj->devx_mr;
1206 struct mlx5_core_mkey *mkey;
1207 void *mkc;
1208 u8 key;
1209
1210 mkey = &devx_mr->mmkey;
1211 mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry);
1212 key = MLX5_GET(mkc, mkc, mkey_7_0);
1213 mkey->key = mlx5_idx_to_mkey(
1214 MLX5_GET(create_mkey_out, out, mkey_index)) | key;
1215 mkey->type = MLX5_MKEY_INDIRECT_DEVX;
1216 mkey->iova = MLX5_GET64(mkc, mkc, start_addr);
1217 mkey->size = MLX5_GET64(mkc, mkc, len);
1218 mkey->pd = MLX5_GET(mkc, mkc, pd);
1219 devx_mr->ndescs = MLX5_GET(mkc, mkc, translations_octword_size);
1220
1221 return xa_err(xa_store(&dev->odp_mkeys, mlx5_base_mkey(mkey->key), mkey,
1222 GFP_KERNEL));
1223 }
1224
devx_handle_mkey_create(struct mlx5_ib_dev * dev,struct devx_obj * obj,void * in,int in_len)1225 static int devx_handle_mkey_create(struct mlx5_ib_dev *dev,
1226 struct devx_obj *obj,
1227 void *in, int in_len)
1228 {
1229 int min_len = MLX5_BYTE_OFF(create_mkey_in, memory_key_mkey_entry) +
1230 MLX5_FLD_SZ_BYTES(create_mkey_in,
1231 memory_key_mkey_entry);
1232 void *mkc;
1233 u8 access_mode;
1234
1235 if (in_len < min_len)
1236 return -EINVAL;
1237
1238 mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry);
1239
1240 access_mode = MLX5_GET(mkc, mkc, access_mode_1_0);
1241 access_mode |= MLX5_GET(mkc, mkc, access_mode_4_2) << 2;
1242
1243 if (access_mode == MLX5_MKC_ACCESS_MODE_KLMS ||
1244 access_mode == MLX5_MKC_ACCESS_MODE_KSM) {
1245 if (IS_ENABLED(CONFIG_INFINIBAND_ON_DEMAND_PAGING))
1246 obj->flags |= DEVX_OBJ_FLAGS_INDIRECT_MKEY;
1247 return 0;
1248 }
1249
1250 MLX5_SET(create_mkey_in, in, mkey_umem_valid, 1);
1251 return 0;
1252 }
1253
devx_cleanup_subscription(struct mlx5_ib_dev * dev,struct devx_event_subscription * sub)1254 static void devx_cleanup_subscription(struct mlx5_ib_dev *dev,
1255 struct devx_event_subscription *sub)
1256 {
1257 struct devx_event *event;
1258 struct devx_obj_event *xa_val_level2;
1259
1260 if (sub->is_cleaned)
1261 return;
1262
1263 sub->is_cleaned = 1;
1264 list_del_rcu(&sub->xa_list);
1265
1266 if (list_empty(&sub->obj_list))
1267 return;
1268
1269 list_del_rcu(&sub->obj_list);
1270 /* check whether key level 1 for this obj_sub_list is empty */
1271 event = xa_load(&dev->devx_event_table.event_xa,
1272 sub->xa_key_level1);
1273 WARN_ON(!event);
1274
1275 xa_val_level2 = xa_load(&event->object_ids, sub->xa_key_level2);
1276 if (list_empty(&xa_val_level2->obj_sub_list)) {
1277 xa_erase(&event->object_ids,
1278 sub->xa_key_level2);
1279 kfree_rcu(xa_val_level2, rcu);
1280 }
1281 }
1282
devx_obj_cleanup(struct ib_uobject * uobject,enum rdma_remove_reason why,struct uverbs_attr_bundle * attrs)1283 static int devx_obj_cleanup(struct ib_uobject *uobject,
1284 enum rdma_remove_reason why,
1285 struct uverbs_attr_bundle *attrs)
1286 {
1287 u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
1288 struct mlx5_devx_event_table *devx_event_table;
1289 struct devx_obj *obj = uobject->object;
1290 struct devx_event_subscription *sub_entry, *tmp;
1291 struct mlx5_ib_dev *dev;
1292 int ret;
1293
1294 dev = mlx5_udata_to_mdev(&attrs->driver_udata);
1295 if (obj->flags & DEVX_OBJ_FLAGS_INDIRECT_MKEY) {
1296 /*
1297 * The pagefault_single_data_segment() does commands against
1298 * the mmkey, we must wait for that to stop before freeing the
1299 * mkey, as another allocation could get the same mkey #.
1300 */
1301 xa_erase(&obj->ib_dev->odp_mkeys,
1302 mlx5_base_mkey(obj->devx_mr.mmkey.key));
1303 synchronize_srcu(&dev->odp_srcu);
1304 }
1305
1306 if (obj->flags & DEVX_OBJ_FLAGS_DCT)
1307 ret = mlx5_core_destroy_dct(obj->ib_dev, &obj->core_dct);
1308 else if (obj->flags & DEVX_OBJ_FLAGS_CQ)
1309 ret = mlx5_core_destroy_cq(obj->ib_dev->mdev, &obj->core_cq);
1310 else
1311 ret = mlx5_cmd_exec(obj->ib_dev->mdev, obj->dinbox,
1312 obj->dinlen, out, sizeof(out));
1313 if (ib_is_destroy_retryable(ret, why, uobject))
1314 return ret;
1315
1316 devx_event_table = &dev->devx_event_table;
1317
1318 mutex_lock(&devx_event_table->event_xa_lock);
1319 list_for_each_entry_safe(sub_entry, tmp, &obj->event_sub, obj_list)
1320 devx_cleanup_subscription(dev, sub_entry);
1321 mutex_unlock(&devx_event_table->event_xa_lock);
1322
1323 kfree(obj);
1324 return ret;
1325 }
1326
devx_cq_comp(struct mlx5_core_cq * mcq,struct mlx5_eqe * eqe)1327 static void devx_cq_comp(struct mlx5_core_cq *mcq, struct mlx5_eqe *eqe)
1328 {
1329 struct devx_obj *obj = container_of(mcq, struct devx_obj, core_cq);
1330 struct mlx5_devx_event_table *table;
1331 struct devx_event *event;
1332 struct devx_obj_event *obj_event;
1333 u32 obj_id = mcq->cqn;
1334
1335 table = &obj->ib_dev->devx_event_table;
1336 rcu_read_lock();
1337 event = xa_load(&table->event_xa, MLX5_EVENT_TYPE_COMP);
1338 if (!event)
1339 goto out;
1340
1341 obj_event = xa_load(&event->object_ids, obj_id);
1342 if (!obj_event)
1343 goto out;
1344
1345 dispatch_event_fd(&obj_event->obj_sub_list, eqe);
1346 out:
1347 rcu_read_unlock();
1348 }
1349
UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_CREATE)1350 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_CREATE)(
1351 struct uverbs_attr_bundle *attrs)
1352 {
1353 void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN);
1354 int cmd_out_len = uverbs_attr_get_len(attrs,
1355 MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT);
1356 int cmd_in_len = uverbs_attr_get_len(attrs,
1357 MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN);
1358 void *cmd_out;
1359 struct ib_uobject *uobj = uverbs_attr_get_uobject(
1360 attrs, MLX5_IB_ATTR_DEVX_OBJ_CREATE_HANDLE);
1361 struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1362 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1363 struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
1364 u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
1365 struct devx_obj *obj;
1366 u16 obj_type = 0;
1367 int err;
1368 int uid;
1369 u32 obj_id;
1370 u16 opcode;
1371
1372 if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id))
1373 return -EINVAL;
1374
1375 uid = devx_get_uid(c, cmd_in);
1376 if (uid < 0)
1377 return uid;
1378
1379 if (!devx_is_obj_create_cmd(cmd_in, &opcode))
1380 return -EINVAL;
1381
1382 cmd_out = uverbs_zalloc(attrs, cmd_out_len);
1383 if (IS_ERR(cmd_out))
1384 return PTR_ERR(cmd_out);
1385
1386 obj = kzalloc(sizeof(struct devx_obj), GFP_KERNEL);
1387 if (!obj)
1388 return -ENOMEM;
1389
1390 MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1391 if (opcode == MLX5_CMD_OP_CREATE_MKEY) {
1392 err = devx_handle_mkey_create(dev, obj, cmd_in, cmd_in_len);
1393 if (err)
1394 goto obj_free;
1395 } else {
1396 devx_set_umem_valid(cmd_in);
1397 }
1398
1399 if (opcode == MLX5_CMD_OP_CREATE_DCT) {
1400 obj->flags |= DEVX_OBJ_FLAGS_DCT;
1401 err = mlx5_core_create_dct(dev, &obj->core_dct, cmd_in,
1402 cmd_in_len, cmd_out, cmd_out_len);
1403 } else if (opcode == MLX5_CMD_OP_CREATE_CQ) {
1404 obj->flags |= DEVX_OBJ_FLAGS_CQ;
1405 obj->core_cq.comp = devx_cq_comp;
1406 err = mlx5_core_create_cq(dev->mdev, &obj->core_cq,
1407 cmd_in, cmd_in_len, cmd_out,
1408 cmd_out_len);
1409 } else {
1410 err = mlx5_cmd_exec(dev->mdev, cmd_in,
1411 cmd_in_len,
1412 cmd_out, cmd_out_len);
1413 }
1414
1415 if (err)
1416 goto obj_free;
1417
1418 if (opcode == MLX5_CMD_OP_ALLOC_FLOW_COUNTER) {
1419 u8 bulk = MLX5_GET(alloc_flow_counter_in,
1420 cmd_in,
1421 flow_counter_bulk);
1422 obj->flow_counter_bulk_size = 128UL * bulk;
1423 }
1424
1425 uobj->object = obj;
1426 INIT_LIST_HEAD(&obj->event_sub);
1427 obj->ib_dev = dev;
1428 devx_obj_build_destroy_cmd(cmd_in, cmd_out, obj->dinbox, &obj->dinlen,
1429 &obj_id);
1430 WARN_ON(obj->dinlen > MLX5_MAX_DESTROY_INBOX_SIZE_DW * sizeof(u32));
1431
1432 err = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT, cmd_out, cmd_out_len);
1433 if (err)
1434 goto obj_destroy;
1435
1436 if (opcode == MLX5_CMD_OP_CREATE_GENERAL_OBJECT)
1437 obj_type = MLX5_GET(general_obj_in_cmd_hdr, cmd_in, obj_type);
1438 obj->obj_id = get_enc_obj_id(opcode | obj_type << 16, obj_id);
1439
1440 if (obj->flags & DEVX_OBJ_FLAGS_INDIRECT_MKEY) {
1441 err = devx_handle_mkey_indirect(obj, dev, cmd_in, cmd_out);
1442 if (err)
1443 goto obj_destroy;
1444 }
1445 return 0;
1446
1447 obj_destroy:
1448 if (obj->flags & DEVX_OBJ_FLAGS_DCT)
1449 mlx5_core_destroy_dct(obj->ib_dev, &obj->core_dct);
1450 else if (obj->flags & DEVX_OBJ_FLAGS_CQ)
1451 mlx5_core_destroy_cq(obj->ib_dev->mdev, &obj->core_cq);
1452 else
1453 mlx5_cmd_exec(obj->ib_dev->mdev, obj->dinbox, obj->dinlen, out,
1454 sizeof(out));
1455 obj_free:
1456 kfree(obj);
1457 return err;
1458 }
1459
UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_MODIFY)1460 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_MODIFY)(
1461 struct uverbs_attr_bundle *attrs)
1462 {
1463 void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN);
1464 int cmd_out_len = uverbs_attr_get_len(attrs,
1465 MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT);
1466 struct ib_uobject *uobj = uverbs_attr_get_uobject(attrs,
1467 MLX5_IB_ATTR_DEVX_OBJ_MODIFY_HANDLE);
1468 struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1469 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1470 struct mlx5_ib_dev *mdev = to_mdev(c->ibucontext.device);
1471 void *cmd_out;
1472 int err;
1473 int uid;
1474
1475 if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id))
1476 return -EINVAL;
1477
1478 uid = devx_get_uid(c, cmd_in);
1479 if (uid < 0)
1480 return uid;
1481
1482 if (!devx_is_obj_modify_cmd(cmd_in))
1483 return -EINVAL;
1484
1485 if (!devx_is_valid_obj_id(attrs, uobj, cmd_in))
1486 return -EINVAL;
1487
1488 cmd_out = uverbs_zalloc(attrs, cmd_out_len);
1489 if (IS_ERR(cmd_out))
1490 return PTR_ERR(cmd_out);
1491
1492 MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1493 devx_set_umem_valid(cmd_in);
1494
1495 err = mlx5_cmd_exec(mdev->mdev, cmd_in,
1496 uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN),
1497 cmd_out, cmd_out_len);
1498 if (err)
1499 return err;
1500
1501 return uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT,
1502 cmd_out, cmd_out_len);
1503 }
1504
UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_QUERY)1505 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_QUERY)(
1506 struct uverbs_attr_bundle *attrs)
1507 {
1508 void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN);
1509 int cmd_out_len = uverbs_attr_get_len(attrs,
1510 MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT);
1511 struct ib_uobject *uobj = uverbs_attr_get_uobject(attrs,
1512 MLX5_IB_ATTR_DEVX_OBJ_QUERY_HANDLE);
1513 struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1514 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1515 void *cmd_out;
1516 int err;
1517 int uid;
1518 struct mlx5_ib_dev *mdev = to_mdev(c->ibucontext.device);
1519
1520 if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id))
1521 return -EINVAL;
1522
1523 uid = devx_get_uid(c, cmd_in);
1524 if (uid < 0)
1525 return uid;
1526
1527 if (!devx_is_obj_query_cmd(cmd_in))
1528 return -EINVAL;
1529
1530 if (!devx_is_valid_obj_id(attrs, uobj, cmd_in))
1531 return -EINVAL;
1532
1533 cmd_out = uverbs_zalloc(attrs, cmd_out_len);
1534 if (IS_ERR(cmd_out))
1535 return PTR_ERR(cmd_out);
1536
1537 MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1538 err = mlx5_cmd_exec(mdev->mdev, cmd_in,
1539 uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN),
1540 cmd_out, cmd_out_len);
1541 if (err)
1542 return err;
1543
1544 return uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT,
1545 cmd_out, cmd_out_len);
1546 }
1547
1548 struct devx_async_event_queue {
1549 spinlock_t lock;
1550 wait_queue_head_t poll_wait;
1551 struct list_head event_list;
1552 atomic_t bytes_in_use;
1553 u8 is_destroyed:1;
1554 };
1555
1556 struct devx_async_cmd_event_file {
1557 struct ib_uobject uobj;
1558 struct devx_async_event_queue ev_queue;
1559 struct mlx5_async_ctx async_ctx;
1560 };
1561
devx_init_event_queue(struct devx_async_event_queue * ev_queue)1562 static void devx_init_event_queue(struct devx_async_event_queue *ev_queue)
1563 {
1564 spin_lock_init(&ev_queue->lock);
1565 INIT_LIST_HEAD(&ev_queue->event_list);
1566 init_waitqueue_head(&ev_queue->poll_wait);
1567 atomic_set(&ev_queue->bytes_in_use, 0);
1568 ev_queue->is_destroyed = 0;
1569 }
1570
UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC)1571 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC)(
1572 struct uverbs_attr_bundle *attrs)
1573 {
1574 struct devx_async_cmd_event_file *ev_file;
1575
1576 struct ib_uobject *uobj = uverbs_attr_get_uobject(
1577 attrs, MLX5_IB_ATTR_DEVX_ASYNC_CMD_FD_ALLOC_HANDLE);
1578 struct mlx5_ib_dev *mdev = mlx5_udata_to_mdev(&attrs->driver_udata);
1579
1580 ev_file = container_of(uobj, struct devx_async_cmd_event_file,
1581 uobj);
1582 devx_init_event_queue(&ev_file->ev_queue);
1583 mlx5_cmd_init_async_ctx(mdev->mdev, &ev_file->async_ctx);
1584 return 0;
1585 }
1586
UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC)1587 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC)(
1588 struct uverbs_attr_bundle *attrs)
1589 {
1590 struct ib_uobject *uobj = uverbs_attr_get_uobject(
1591 attrs, MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_HANDLE);
1592 struct devx_async_event_file *ev_file;
1593 struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1594 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1595 struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
1596 u32 flags;
1597 int err;
1598
1599 err = uverbs_get_flags32(&flags, attrs,
1600 MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_FLAGS,
1601 MLX5_IB_UAPI_DEVX_CR_EV_CH_FLAGS_OMIT_DATA);
1602
1603 if (err)
1604 return err;
1605
1606 ev_file = container_of(uobj, struct devx_async_event_file,
1607 uobj);
1608 spin_lock_init(&ev_file->lock);
1609 INIT_LIST_HEAD(&ev_file->event_list);
1610 init_waitqueue_head(&ev_file->poll_wait);
1611 if (flags & MLX5_IB_UAPI_DEVX_CR_EV_CH_FLAGS_OMIT_DATA)
1612 ev_file->omit_data = 1;
1613 INIT_LIST_HEAD(&ev_file->subscribed_events_list);
1614 ev_file->dev = dev;
1615 get_device(&dev->ib_dev.dev);
1616 return 0;
1617 }
1618
devx_query_callback(int status,struct mlx5_async_work * context)1619 static void devx_query_callback(int status, struct mlx5_async_work *context)
1620 {
1621 struct devx_async_data *async_data =
1622 container_of(context, struct devx_async_data, cb_work);
1623 struct devx_async_cmd_event_file *ev_file = async_data->ev_file;
1624 struct devx_async_event_queue *ev_queue = &ev_file->ev_queue;
1625 unsigned long flags;
1626
1627 /*
1628 * Note that if the struct devx_async_cmd_event_file uobj begins to be
1629 * destroyed it will block at mlx5_cmd_cleanup_async_ctx() until this
1630 * routine returns, ensuring that it always remains valid here.
1631 */
1632 spin_lock_irqsave(&ev_queue->lock, flags);
1633 list_add_tail(&async_data->list, &ev_queue->event_list);
1634 spin_unlock_irqrestore(&ev_queue->lock, flags);
1635
1636 wake_up_interruptible(&ev_queue->poll_wait);
1637 }
1638
1639 #define MAX_ASYNC_BYTES_IN_USE (1024 * 1024) /* 1MB */
1640
UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_ASYNC_QUERY)1641 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_ASYNC_QUERY)(
1642 struct uverbs_attr_bundle *attrs)
1643 {
1644 void *cmd_in = uverbs_attr_get_alloced_ptr(attrs,
1645 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_CMD_IN);
1646 struct ib_uobject *uobj = uverbs_attr_get_uobject(
1647 attrs,
1648 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_HANDLE);
1649 u16 cmd_out_len;
1650 struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1651 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1652 struct ib_uobject *fd_uobj;
1653 int err;
1654 int uid;
1655 struct mlx5_ib_dev *mdev = to_mdev(c->ibucontext.device);
1656 struct devx_async_cmd_event_file *ev_file;
1657 struct devx_async_data *async_data;
1658
1659 if (MLX5_GET(general_obj_in_cmd_hdr, cmd_in, vhca_tunnel_id))
1660 return -EINVAL;
1661
1662 uid = devx_get_uid(c, cmd_in);
1663 if (uid < 0)
1664 return uid;
1665
1666 if (!devx_is_obj_query_cmd(cmd_in))
1667 return -EINVAL;
1668
1669 err = uverbs_get_const(&cmd_out_len, attrs,
1670 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_OUT_LEN);
1671 if (err)
1672 return err;
1673
1674 if (!devx_is_valid_obj_id(attrs, uobj, cmd_in))
1675 return -EINVAL;
1676
1677 fd_uobj = uverbs_attr_get_uobject(attrs,
1678 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_FD);
1679 if (IS_ERR(fd_uobj))
1680 return PTR_ERR(fd_uobj);
1681
1682 ev_file = container_of(fd_uobj, struct devx_async_cmd_event_file,
1683 uobj);
1684
1685 if (atomic_add_return(cmd_out_len, &ev_file->ev_queue.bytes_in_use) >
1686 MAX_ASYNC_BYTES_IN_USE) {
1687 atomic_sub(cmd_out_len, &ev_file->ev_queue.bytes_in_use);
1688 return -EAGAIN;
1689 }
1690
1691 async_data = kvzalloc(struct_size(async_data, hdr.out_data,
1692 cmd_out_len), GFP_KERNEL);
1693 if (!async_data) {
1694 err = -ENOMEM;
1695 goto sub_bytes;
1696 }
1697
1698 err = uverbs_copy_from(&async_data->hdr.wr_id, attrs,
1699 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_WR_ID);
1700 if (err)
1701 goto free_async;
1702
1703 async_data->cmd_out_len = cmd_out_len;
1704 async_data->mdev = mdev;
1705 async_data->ev_file = ev_file;
1706
1707 MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, uid);
1708 err = mlx5_cmd_exec_cb(&ev_file->async_ctx, cmd_in,
1709 uverbs_attr_get_len(attrs,
1710 MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_CMD_IN),
1711 async_data->hdr.out_data,
1712 async_data->cmd_out_len,
1713 devx_query_callback, &async_data->cb_work);
1714
1715 if (err)
1716 goto free_async;
1717
1718 return 0;
1719
1720 free_async:
1721 kvfree(async_data);
1722 sub_bytes:
1723 atomic_sub(cmd_out_len, &ev_file->ev_queue.bytes_in_use);
1724 return err;
1725 }
1726
1727 static void
subscribe_event_xa_dealloc(struct mlx5_devx_event_table * devx_event_table,u32 key_level1,bool is_level2,u32 key_level2)1728 subscribe_event_xa_dealloc(struct mlx5_devx_event_table *devx_event_table,
1729 u32 key_level1,
1730 bool is_level2,
1731 u32 key_level2)
1732 {
1733 struct devx_event *event;
1734 struct devx_obj_event *xa_val_level2;
1735
1736 /* Level 1 is valid for future use, no need to free */
1737 if (!is_level2)
1738 return;
1739
1740 event = xa_load(&devx_event_table->event_xa, key_level1);
1741 WARN_ON(!event);
1742
1743 xa_val_level2 = xa_load(&event->object_ids,
1744 key_level2);
1745 if (list_empty(&xa_val_level2->obj_sub_list)) {
1746 xa_erase(&event->object_ids,
1747 key_level2);
1748 kfree_rcu(xa_val_level2, rcu);
1749 }
1750 }
1751
1752 static int
subscribe_event_xa_alloc(struct mlx5_devx_event_table * devx_event_table,u32 key_level1,bool is_level2,u32 key_level2)1753 subscribe_event_xa_alloc(struct mlx5_devx_event_table *devx_event_table,
1754 u32 key_level1,
1755 bool is_level2,
1756 u32 key_level2)
1757 {
1758 struct devx_obj_event *obj_event;
1759 struct devx_event *event;
1760 int err;
1761
1762 event = xa_load(&devx_event_table->event_xa, key_level1);
1763 if (!event) {
1764 event = kzalloc(sizeof(*event), GFP_KERNEL);
1765 if (!event)
1766 return -ENOMEM;
1767
1768 INIT_LIST_HEAD(&event->unaffiliated_list);
1769 xa_init(&event->object_ids);
1770
1771 err = xa_insert(&devx_event_table->event_xa,
1772 key_level1,
1773 event,
1774 GFP_KERNEL);
1775 if (err) {
1776 kfree(event);
1777 return err;
1778 }
1779 }
1780
1781 if (!is_level2)
1782 return 0;
1783
1784 obj_event = xa_load(&event->object_ids, key_level2);
1785 if (!obj_event) {
1786 obj_event = kzalloc(sizeof(*obj_event), GFP_KERNEL);
1787 if (!obj_event)
1788 /* Level1 is valid for future use, no need to free */
1789 return -ENOMEM;
1790
1791 err = xa_insert(&event->object_ids,
1792 key_level2,
1793 obj_event,
1794 GFP_KERNEL);
1795 if (err)
1796 return err;
1797 INIT_LIST_HEAD(&obj_event->obj_sub_list);
1798 }
1799
1800 return 0;
1801 }
1802
is_valid_events_legacy(int num_events,u16 * event_type_num_list,struct devx_obj * obj)1803 static bool is_valid_events_legacy(int num_events, u16 *event_type_num_list,
1804 struct devx_obj *obj)
1805 {
1806 int i;
1807
1808 for (i = 0; i < num_events; i++) {
1809 if (obj) {
1810 if (!is_legacy_obj_event_num(event_type_num_list[i]))
1811 return false;
1812 } else if (!is_legacy_unaffiliated_event_num(
1813 event_type_num_list[i])) {
1814 return false;
1815 }
1816 }
1817
1818 return true;
1819 }
1820
1821 #define MAX_SUPP_EVENT_NUM 255
is_valid_events(struct mlx5_core_dev * dev,int num_events,u16 * event_type_num_list,struct devx_obj * obj)1822 static bool is_valid_events(struct mlx5_core_dev *dev,
1823 int num_events, u16 *event_type_num_list,
1824 struct devx_obj *obj)
1825 {
1826 __be64 *aff_events;
1827 __be64 *unaff_events;
1828 int mask_entry;
1829 int mask_bit;
1830 int i;
1831
1832 if (MLX5_CAP_GEN(dev, event_cap)) {
1833 aff_events = MLX5_CAP_DEV_EVENT(dev,
1834 user_affiliated_events);
1835 unaff_events = MLX5_CAP_DEV_EVENT(dev,
1836 user_unaffiliated_events);
1837 } else {
1838 return is_valid_events_legacy(num_events, event_type_num_list,
1839 obj);
1840 }
1841
1842 for (i = 0; i < num_events; i++) {
1843 if (event_type_num_list[i] > MAX_SUPP_EVENT_NUM)
1844 return false;
1845
1846 mask_entry = event_type_num_list[i] / 64;
1847 mask_bit = event_type_num_list[i] % 64;
1848
1849 if (obj) {
1850 /* CQ completion */
1851 if (event_type_num_list[i] == 0)
1852 continue;
1853
1854 if (!(be64_to_cpu(aff_events[mask_entry]) &
1855 (1ull << mask_bit)))
1856 return false;
1857
1858 continue;
1859 }
1860
1861 if (!(be64_to_cpu(unaff_events[mask_entry]) &
1862 (1ull << mask_bit)))
1863 return false;
1864 }
1865
1866 return true;
1867 }
1868
1869 #define MAX_NUM_EVENTS 16
UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT)1870 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT)(
1871 struct uverbs_attr_bundle *attrs)
1872 {
1873 struct ib_uobject *devx_uobj = uverbs_attr_get_uobject(
1874 attrs,
1875 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_OBJ_HANDLE);
1876 struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
1877 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
1878 struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
1879 struct ib_uobject *fd_uobj;
1880 struct devx_obj *obj = NULL;
1881 struct devx_async_event_file *ev_file;
1882 struct mlx5_devx_event_table *devx_event_table = &dev->devx_event_table;
1883 u16 *event_type_num_list;
1884 struct devx_event_subscription *event_sub, *tmp_sub;
1885 struct list_head sub_list;
1886 int redirect_fd;
1887 bool use_eventfd = false;
1888 int num_events;
1889 int num_alloc_xa_entries = 0;
1890 u16 obj_type = 0;
1891 u64 cookie = 0;
1892 u32 obj_id = 0;
1893 int err;
1894 int i;
1895
1896 if (!c->devx_uid)
1897 return -EINVAL;
1898
1899 if (!IS_ERR(devx_uobj)) {
1900 obj = (struct devx_obj *)devx_uobj->object;
1901 if (obj)
1902 obj_id = get_dec_obj_id(obj->obj_id);
1903 }
1904
1905 fd_uobj = uverbs_attr_get_uobject(attrs,
1906 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_HANDLE);
1907 if (IS_ERR(fd_uobj))
1908 return PTR_ERR(fd_uobj);
1909
1910 ev_file = container_of(fd_uobj, struct devx_async_event_file,
1911 uobj);
1912
1913 if (uverbs_attr_is_valid(attrs,
1914 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_NUM)) {
1915 err = uverbs_copy_from(&redirect_fd, attrs,
1916 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_NUM);
1917 if (err)
1918 return err;
1919
1920 use_eventfd = true;
1921 }
1922
1923 if (uverbs_attr_is_valid(attrs,
1924 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_COOKIE)) {
1925 if (use_eventfd)
1926 return -EINVAL;
1927
1928 err = uverbs_copy_from(&cookie, attrs,
1929 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_COOKIE);
1930 if (err)
1931 return err;
1932 }
1933
1934 num_events = uverbs_attr_ptr_get_array_size(
1935 attrs, MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_TYPE_NUM_LIST,
1936 sizeof(u16));
1937
1938 if (num_events < 0)
1939 return num_events;
1940
1941 if (num_events > MAX_NUM_EVENTS)
1942 return -EINVAL;
1943
1944 event_type_num_list = uverbs_attr_get_alloced_ptr(attrs,
1945 MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_TYPE_NUM_LIST);
1946
1947 if (!is_valid_events(dev->mdev, num_events, event_type_num_list, obj))
1948 return -EINVAL;
1949
1950 INIT_LIST_HEAD(&sub_list);
1951
1952 /* Protect from concurrent subscriptions to same XA entries to allow
1953 * both to succeed
1954 */
1955 mutex_lock(&devx_event_table->event_xa_lock);
1956 for (i = 0; i < num_events; i++) {
1957 u32 key_level1;
1958
1959 if (obj)
1960 obj_type = get_dec_obj_type(obj,
1961 event_type_num_list[i]);
1962 key_level1 = event_type_num_list[i] | obj_type << 16;
1963
1964 err = subscribe_event_xa_alloc(devx_event_table,
1965 key_level1,
1966 obj,
1967 obj_id);
1968 if (err)
1969 goto err;
1970
1971 num_alloc_xa_entries++;
1972 event_sub = kzalloc(sizeof(*event_sub), GFP_KERNEL);
1973 if (!event_sub) {
1974 err = -ENOMEM;
1975 goto err;
1976 }
1977
1978 list_add_tail(&event_sub->event_list, &sub_list);
1979 uverbs_uobject_get(&ev_file->uobj);
1980 if (use_eventfd) {
1981 event_sub->eventfd =
1982 eventfd_ctx_fdget(redirect_fd);
1983
1984 if (IS_ERR(event_sub->eventfd)) {
1985 err = PTR_ERR(event_sub->eventfd);
1986 event_sub->eventfd = NULL;
1987 goto err;
1988 }
1989 }
1990
1991 event_sub->cookie = cookie;
1992 event_sub->ev_file = ev_file;
1993 /* May be needed upon cleanup the devx object/subscription */
1994 event_sub->xa_key_level1 = key_level1;
1995 event_sub->xa_key_level2 = obj_id;
1996 INIT_LIST_HEAD(&event_sub->obj_list);
1997 }
1998
1999 /* Once all the allocations and the XA data insertions were done we
2000 * can go ahead and add all the subscriptions to the relevant lists
2001 * without concern of a failure.
2002 */
2003 list_for_each_entry_safe(event_sub, tmp_sub, &sub_list, event_list) {
2004 struct devx_event *event;
2005 struct devx_obj_event *obj_event;
2006
2007 list_del_init(&event_sub->event_list);
2008
2009 spin_lock_irq(&ev_file->lock);
2010 list_add_tail_rcu(&event_sub->file_list,
2011 &ev_file->subscribed_events_list);
2012 spin_unlock_irq(&ev_file->lock);
2013
2014 event = xa_load(&devx_event_table->event_xa,
2015 event_sub->xa_key_level1);
2016 WARN_ON(!event);
2017
2018 if (!obj) {
2019 list_add_tail_rcu(&event_sub->xa_list,
2020 &event->unaffiliated_list);
2021 continue;
2022 }
2023
2024 obj_event = xa_load(&event->object_ids, obj_id);
2025 WARN_ON(!obj_event);
2026 list_add_tail_rcu(&event_sub->xa_list,
2027 &obj_event->obj_sub_list);
2028 list_add_tail_rcu(&event_sub->obj_list,
2029 &obj->event_sub);
2030 }
2031
2032 mutex_unlock(&devx_event_table->event_xa_lock);
2033 return 0;
2034
2035 err:
2036 list_for_each_entry_safe(event_sub, tmp_sub, &sub_list, event_list) {
2037 list_del(&event_sub->event_list);
2038
2039 subscribe_event_xa_dealloc(devx_event_table,
2040 event_sub->xa_key_level1,
2041 obj,
2042 obj_id);
2043
2044 if (event_sub->eventfd)
2045 eventfd_ctx_put(event_sub->eventfd);
2046 uverbs_uobject_put(&event_sub->ev_file->uobj);
2047 kfree(event_sub);
2048 }
2049
2050 mutex_unlock(&devx_event_table->event_xa_lock);
2051 return err;
2052 }
2053
devx_umem_get(struct mlx5_ib_dev * dev,struct ib_ucontext * ucontext,struct uverbs_attr_bundle * attrs,struct devx_umem * obj)2054 static int devx_umem_get(struct mlx5_ib_dev *dev, struct ib_ucontext *ucontext,
2055 struct uverbs_attr_bundle *attrs,
2056 struct devx_umem *obj)
2057 {
2058 u64 addr;
2059 size_t size;
2060 u32 access;
2061 int npages;
2062 int err;
2063 u32 page_mask;
2064
2065 if (uverbs_copy_from(&addr, attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_ADDR) ||
2066 uverbs_copy_from(&size, attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_LEN))
2067 return -EFAULT;
2068
2069 err = uverbs_get_flags32(&access, attrs,
2070 MLX5_IB_ATTR_DEVX_UMEM_REG_ACCESS,
2071 IB_ACCESS_LOCAL_WRITE |
2072 IB_ACCESS_REMOTE_WRITE |
2073 IB_ACCESS_REMOTE_READ);
2074 if (err)
2075 return err;
2076
2077 err = ib_check_mr_access(access);
2078 if (err)
2079 return err;
2080
2081 obj->umem = ib_umem_get(&dev->ib_dev, addr, size, access);
2082 if (IS_ERR(obj->umem))
2083 return PTR_ERR(obj->umem);
2084
2085 mlx5_ib_cont_pages(obj->umem, obj->umem->address,
2086 MLX5_MKEY_PAGE_SHIFT_MASK, &npages,
2087 &obj->page_shift, &obj->ncont, NULL);
2088
2089 if (!npages) {
2090 ib_umem_release(obj->umem);
2091 return -EINVAL;
2092 }
2093
2094 page_mask = (1 << obj->page_shift) - 1;
2095 obj->page_offset = obj->umem->address & page_mask;
2096
2097 return 0;
2098 }
2099
devx_umem_reg_cmd_alloc(struct uverbs_attr_bundle * attrs,struct devx_umem * obj,struct devx_umem_reg_cmd * cmd)2100 static int devx_umem_reg_cmd_alloc(struct uverbs_attr_bundle *attrs,
2101 struct devx_umem *obj,
2102 struct devx_umem_reg_cmd *cmd)
2103 {
2104 cmd->inlen = MLX5_ST_SZ_BYTES(create_umem_in) +
2105 (MLX5_ST_SZ_BYTES(mtt) * obj->ncont);
2106 cmd->in = uverbs_zalloc(attrs, cmd->inlen);
2107 return PTR_ERR_OR_ZERO(cmd->in);
2108 }
2109
devx_umem_reg_cmd_build(struct mlx5_ib_dev * dev,struct devx_umem * obj,struct devx_umem_reg_cmd * cmd)2110 static void devx_umem_reg_cmd_build(struct mlx5_ib_dev *dev,
2111 struct devx_umem *obj,
2112 struct devx_umem_reg_cmd *cmd)
2113 {
2114 void *umem;
2115 __be64 *mtt;
2116
2117 umem = MLX5_ADDR_OF(create_umem_in, cmd->in, umem);
2118 mtt = (__be64 *)MLX5_ADDR_OF(umem, umem, mtt);
2119
2120 MLX5_SET(create_umem_in, cmd->in, opcode, MLX5_CMD_OP_CREATE_UMEM);
2121 MLX5_SET64(umem, umem, num_of_mtt, obj->ncont);
2122 MLX5_SET(umem, umem, log_page_size, obj->page_shift -
2123 MLX5_ADAPTER_PAGE_SHIFT);
2124 MLX5_SET(umem, umem, page_offset, obj->page_offset);
2125 mlx5_ib_populate_pas(dev, obj->umem, obj->page_shift, mtt,
2126 (obj->umem->writable ? MLX5_IB_MTT_WRITE : 0) |
2127 MLX5_IB_MTT_READ);
2128 }
2129
UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_UMEM_REG)2130 static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_UMEM_REG)(
2131 struct uverbs_attr_bundle *attrs)
2132 {
2133 struct devx_umem_reg_cmd cmd;
2134 struct devx_umem *obj;
2135 struct ib_uobject *uobj = uverbs_attr_get_uobject(
2136 attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE);
2137 u32 obj_id;
2138 struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
2139 &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
2140 struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
2141 int err;
2142
2143 if (!c->devx_uid)
2144 return -EINVAL;
2145
2146 obj = kzalloc(sizeof(struct devx_umem), GFP_KERNEL);
2147 if (!obj)
2148 return -ENOMEM;
2149
2150 err = devx_umem_get(dev, &c->ibucontext, attrs, obj);
2151 if (err)
2152 goto err_obj_free;
2153
2154 err = devx_umem_reg_cmd_alloc(attrs, obj, &cmd);
2155 if (err)
2156 goto err_umem_release;
2157
2158 devx_umem_reg_cmd_build(dev, obj, &cmd);
2159
2160 MLX5_SET(create_umem_in, cmd.in, uid, c->devx_uid);
2161 err = mlx5_cmd_exec(dev->mdev, cmd.in, cmd.inlen, cmd.out,
2162 sizeof(cmd.out));
2163 if (err)
2164 goto err_umem_release;
2165
2166 obj->mdev = dev->mdev;
2167 uobj->object = obj;
2168 devx_obj_build_destroy_cmd(cmd.in, cmd.out, obj->dinbox, &obj->dinlen, &obj_id);
2169 uverbs_finalize_uobj_create(attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE);
2170
2171 err = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_OUT_ID, &obj_id,
2172 sizeof(obj_id));
2173 return err;
2174
2175 err_umem_release:
2176 ib_umem_release(obj->umem);
2177 err_obj_free:
2178 kfree(obj);
2179 return err;
2180 }
2181
devx_umem_cleanup(struct ib_uobject * uobject,enum rdma_remove_reason why,struct uverbs_attr_bundle * attrs)2182 static int devx_umem_cleanup(struct ib_uobject *uobject,
2183 enum rdma_remove_reason why,
2184 struct uverbs_attr_bundle *attrs)
2185 {
2186 struct devx_umem *obj = uobject->object;
2187 u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
2188 int err;
2189
2190 err = mlx5_cmd_exec(obj->mdev, obj->dinbox, obj->dinlen, out, sizeof(out));
2191 if (ib_is_destroy_retryable(err, why, uobject))
2192 return err;
2193
2194 ib_umem_release(obj->umem);
2195 kfree(obj);
2196 return 0;
2197 }
2198
is_unaffiliated_event(struct mlx5_core_dev * dev,unsigned long event_type)2199 static bool is_unaffiliated_event(struct mlx5_core_dev *dev,
2200 unsigned long event_type)
2201 {
2202 __be64 *unaff_events;
2203 int mask_entry;
2204 int mask_bit;
2205
2206 if (!MLX5_CAP_GEN(dev, event_cap))
2207 return is_legacy_unaffiliated_event_num(event_type);
2208
2209 unaff_events = MLX5_CAP_DEV_EVENT(dev,
2210 user_unaffiliated_events);
2211 WARN_ON(event_type > MAX_SUPP_EVENT_NUM);
2212
2213 mask_entry = event_type / 64;
2214 mask_bit = event_type % 64;
2215
2216 if (!(be64_to_cpu(unaff_events[mask_entry]) & (1ull << mask_bit)))
2217 return false;
2218
2219 return true;
2220 }
2221
devx_get_obj_id_from_event(unsigned long event_type,void * data)2222 static u32 devx_get_obj_id_from_event(unsigned long event_type, void *data)
2223 {
2224 struct mlx5_eqe *eqe = data;
2225 u32 obj_id = 0;
2226
2227 switch (event_type) {
2228 case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR:
2229 case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT:
2230 case MLX5_EVENT_TYPE_PATH_MIG:
2231 case MLX5_EVENT_TYPE_COMM_EST:
2232 case MLX5_EVENT_TYPE_SQ_DRAINED:
2233 case MLX5_EVENT_TYPE_SRQ_LAST_WQE:
2234 case MLX5_EVENT_TYPE_WQ_CATAS_ERROR:
2235 case MLX5_EVENT_TYPE_PATH_MIG_FAILED:
2236 case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
2237 case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR:
2238 obj_id = be32_to_cpu(eqe->data.qp_srq.qp_srq_n) & 0xffffff;
2239 break;
2240 case MLX5_EVENT_TYPE_XRQ_ERROR:
2241 obj_id = be32_to_cpu(eqe->data.xrq_err.type_xrqn) & 0xffffff;
2242 break;
2243 case MLX5_EVENT_TYPE_DCT_DRAINED:
2244 case MLX5_EVENT_TYPE_DCT_KEY_VIOLATION:
2245 obj_id = be32_to_cpu(eqe->data.dct.dctn) & 0xffffff;
2246 break;
2247 case MLX5_EVENT_TYPE_CQ_ERROR:
2248 obj_id = be32_to_cpu(eqe->data.cq_err.cqn) & 0xffffff;
2249 break;
2250 default:
2251 obj_id = MLX5_GET(affiliated_event_header, &eqe->data, obj_id);
2252 break;
2253 }
2254
2255 return obj_id;
2256 }
2257
deliver_event(struct devx_event_subscription * event_sub,const void * data)2258 static int deliver_event(struct devx_event_subscription *event_sub,
2259 const void *data)
2260 {
2261 struct devx_async_event_file *ev_file;
2262 struct devx_async_event_data *event_data;
2263 unsigned long flags;
2264
2265 ev_file = event_sub->ev_file;
2266
2267 if (ev_file->omit_data) {
2268 spin_lock_irqsave(&ev_file->lock, flags);
2269 if (!list_empty(&event_sub->event_list) ||
2270 ev_file->is_destroyed) {
2271 spin_unlock_irqrestore(&ev_file->lock, flags);
2272 return 0;
2273 }
2274
2275 list_add_tail(&event_sub->event_list, &ev_file->event_list);
2276 spin_unlock_irqrestore(&ev_file->lock, flags);
2277 wake_up_interruptible(&ev_file->poll_wait);
2278 return 0;
2279 }
2280
2281 event_data = kzalloc(sizeof(*event_data) + sizeof(struct mlx5_eqe),
2282 GFP_ATOMIC);
2283 if (!event_data) {
2284 spin_lock_irqsave(&ev_file->lock, flags);
2285 ev_file->is_overflow_err = 1;
2286 spin_unlock_irqrestore(&ev_file->lock, flags);
2287 return -ENOMEM;
2288 }
2289
2290 event_data->hdr.cookie = event_sub->cookie;
2291 memcpy(event_data->hdr.out_data, data, sizeof(struct mlx5_eqe));
2292
2293 spin_lock_irqsave(&ev_file->lock, flags);
2294 if (!ev_file->is_destroyed)
2295 list_add_tail(&event_data->list, &ev_file->event_list);
2296 else
2297 kfree(event_data);
2298 spin_unlock_irqrestore(&ev_file->lock, flags);
2299 wake_up_interruptible(&ev_file->poll_wait);
2300
2301 return 0;
2302 }
2303
dispatch_event_fd(struct list_head * fd_list,const void * data)2304 static void dispatch_event_fd(struct list_head *fd_list,
2305 const void *data)
2306 {
2307 struct devx_event_subscription *item;
2308
2309 list_for_each_entry_rcu(item, fd_list, xa_list) {
2310 if (item->eventfd)
2311 eventfd_signal(item->eventfd, 1);
2312 else
2313 deliver_event(item, data);
2314 }
2315 }
2316
devx_event_notifier(struct notifier_block * nb,unsigned long event_type,void * data)2317 static int devx_event_notifier(struct notifier_block *nb,
2318 unsigned long event_type, void *data)
2319 {
2320 struct mlx5_devx_event_table *table;
2321 struct mlx5_ib_dev *dev;
2322 struct devx_event *event;
2323 struct devx_obj_event *obj_event;
2324 u16 obj_type = 0;
2325 bool is_unaffiliated;
2326 u32 obj_id;
2327
2328 /* Explicit filtering to kernel events which may occur frequently */
2329 if (event_type == MLX5_EVENT_TYPE_CMD ||
2330 event_type == MLX5_EVENT_TYPE_PAGE_REQUEST)
2331 return NOTIFY_OK;
2332
2333 table = container_of(nb, struct mlx5_devx_event_table, devx_nb.nb);
2334 dev = container_of(table, struct mlx5_ib_dev, devx_event_table);
2335 is_unaffiliated = is_unaffiliated_event(dev->mdev, event_type);
2336
2337 if (!is_unaffiliated)
2338 obj_type = get_event_obj_type(event_type, data);
2339
2340 rcu_read_lock();
2341 event = xa_load(&table->event_xa, event_type | (obj_type << 16));
2342 if (!event) {
2343 rcu_read_unlock();
2344 return NOTIFY_DONE;
2345 }
2346
2347 if (is_unaffiliated) {
2348 dispatch_event_fd(&event->unaffiliated_list, data);
2349 rcu_read_unlock();
2350 return NOTIFY_OK;
2351 }
2352
2353 obj_id = devx_get_obj_id_from_event(event_type, data);
2354 obj_event = xa_load(&event->object_ids, obj_id);
2355 if (!obj_event) {
2356 rcu_read_unlock();
2357 return NOTIFY_DONE;
2358 }
2359
2360 dispatch_event_fd(&obj_event->obj_sub_list, data);
2361
2362 rcu_read_unlock();
2363 return NOTIFY_OK;
2364 }
2365
mlx5_ib_devx_init(struct mlx5_ib_dev * dev)2366 int mlx5_ib_devx_init(struct mlx5_ib_dev *dev)
2367 {
2368 struct mlx5_devx_event_table *table = &dev->devx_event_table;
2369 int uid;
2370
2371 uid = mlx5_ib_devx_create(dev, false);
2372 if (uid > 0) {
2373 dev->devx_whitelist_uid = uid;
2374 xa_init(&table->event_xa);
2375 mutex_init(&table->event_xa_lock);
2376 MLX5_NB_INIT(&table->devx_nb, devx_event_notifier, NOTIFY_ANY);
2377 mlx5_eq_notifier_register(dev->mdev, &table->devx_nb);
2378 }
2379
2380 return 0;
2381 }
2382
mlx5_ib_devx_cleanup(struct mlx5_ib_dev * dev)2383 void mlx5_ib_devx_cleanup(struct mlx5_ib_dev *dev)
2384 {
2385 struct mlx5_devx_event_table *table = &dev->devx_event_table;
2386 struct devx_event_subscription *sub, *tmp;
2387 struct devx_event *event;
2388 void *entry;
2389 unsigned long id;
2390
2391 if (dev->devx_whitelist_uid) {
2392 mlx5_eq_notifier_unregister(dev->mdev, &table->devx_nb);
2393 mutex_lock(&dev->devx_event_table.event_xa_lock);
2394 xa_for_each(&table->event_xa, id, entry) {
2395 event = entry;
2396 list_for_each_entry_safe(
2397 sub, tmp, &event->unaffiliated_list, xa_list)
2398 devx_cleanup_subscription(dev, sub);
2399 kfree(entry);
2400 }
2401 mutex_unlock(&dev->devx_event_table.event_xa_lock);
2402 xa_destroy(&table->event_xa);
2403
2404 mlx5_ib_devx_destroy(dev, dev->devx_whitelist_uid);
2405 }
2406 }
2407
devx_async_cmd_event_read(struct file * filp,char __user * buf,size_t count,loff_t * pos)2408 static ssize_t devx_async_cmd_event_read(struct file *filp, char __user *buf,
2409 size_t count, loff_t *pos)
2410 {
2411 struct devx_async_cmd_event_file *comp_ev_file = filp->private_data;
2412 struct devx_async_event_queue *ev_queue = &comp_ev_file->ev_queue;
2413 struct devx_async_data *event;
2414 int ret = 0;
2415 size_t eventsz;
2416
2417 spin_lock_irq(&ev_queue->lock);
2418
2419 while (list_empty(&ev_queue->event_list)) {
2420 spin_unlock_irq(&ev_queue->lock);
2421
2422 if (filp->f_flags & O_NONBLOCK)
2423 return -EAGAIN;
2424
2425 if (wait_event_interruptible(
2426 ev_queue->poll_wait,
2427 (!list_empty(&ev_queue->event_list) ||
2428 ev_queue->is_destroyed))) {
2429 return -ERESTARTSYS;
2430 }
2431
2432 spin_lock_irq(&ev_queue->lock);
2433 if (ev_queue->is_destroyed) {
2434 spin_unlock_irq(&ev_queue->lock);
2435 return -EIO;
2436 }
2437 }
2438
2439 event = list_entry(ev_queue->event_list.next,
2440 struct devx_async_data, list);
2441 eventsz = event->cmd_out_len +
2442 sizeof(struct mlx5_ib_uapi_devx_async_cmd_hdr);
2443
2444 if (eventsz > count) {
2445 spin_unlock_irq(&ev_queue->lock);
2446 return -ENOSPC;
2447 }
2448
2449 list_del(ev_queue->event_list.next);
2450 spin_unlock_irq(&ev_queue->lock);
2451
2452 if (copy_to_user(buf, &event->hdr, eventsz))
2453 ret = -EFAULT;
2454 else
2455 ret = eventsz;
2456
2457 atomic_sub(event->cmd_out_len, &ev_queue->bytes_in_use);
2458 kvfree(event);
2459 return ret;
2460 }
2461
devx_async_cmd_event_poll(struct file * filp,struct poll_table_struct * wait)2462 static __poll_t devx_async_cmd_event_poll(struct file *filp,
2463 struct poll_table_struct *wait)
2464 {
2465 struct devx_async_cmd_event_file *comp_ev_file = filp->private_data;
2466 struct devx_async_event_queue *ev_queue = &comp_ev_file->ev_queue;
2467 __poll_t pollflags = 0;
2468
2469 poll_wait(filp, &ev_queue->poll_wait, wait);
2470
2471 spin_lock_irq(&ev_queue->lock);
2472 if (ev_queue->is_destroyed)
2473 pollflags = EPOLLIN | EPOLLRDNORM | EPOLLRDHUP;
2474 else if (!list_empty(&ev_queue->event_list))
2475 pollflags = EPOLLIN | EPOLLRDNORM;
2476 spin_unlock_irq(&ev_queue->lock);
2477
2478 return pollflags;
2479 }
2480
2481 static const struct file_operations devx_async_cmd_event_fops = {
2482 .owner = THIS_MODULE,
2483 .read = devx_async_cmd_event_read,
2484 .poll = devx_async_cmd_event_poll,
2485 .release = uverbs_uobject_fd_release,
2486 .llseek = no_llseek,
2487 };
2488
devx_async_event_read(struct file * filp,char __user * buf,size_t count,loff_t * pos)2489 static ssize_t devx_async_event_read(struct file *filp, char __user *buf,
2490 size_t count, loff_t *pos)
2491 {
2492 struct devx_async_event_file *ev_file = filp->private_data;
2493 struct devx_event_subscription *event_sub;
2494 struct devx_async_event_data *event;
2495 int ret = 0;
2496 size_t eventsz;
2497 bool omit_data;
2498 void *event_data;
2499
2500 omit_data = ev_file->omit_data;
2501
2502 spin_lock_irq(&ev_file->lock);
2503
2504 if (ev_file->is_overflow_err) {
2505 ev_file->is_overflow_err = 0;
2506 spin_unlock_irq(&ev_file->lock);
2507 return -EOVERFLOW;
2508 }
2509
2510
2511 while (list_empty(&ev_file->event_list)) {
2512 spin_unlock_irq(&ev_file->lock);
2513
2514 if (filp->f_flags & O_NONBLOCK)
2515 return -EAGAIN;
2516
2517 if (wait_event_interruptible(ev_file->poll_wait,
2518 (!list_empty(&ev_file->event_list) ||
2519 ev_file->is_destroyed))) {
2520 return -ERESTARTSYS;
2521 }
2522
2523 spin_lock_irq(&ev_file->lock);
2524 if (ev_file->is_destroyed) {
2525 spin_unlock_irq(&ev_file->lock);
2526 return -EIO;
2527 }
2528 }
2529
2530 if (omit_data) {
2531 event_sub = list_first_entry(&ev_file->event_list,
2532 struct devx_event_subscription,
2533 event_list);
2534 eventsz = sizeof(event_sub->cookie);
2535 event_data = &event_sub->cookie;
2536 } else {
2537 event = list_first_entry(&ev_file->event_list,
2538 struct devx_async_event_data, list);
2539 eventsz = sizeof(struct mlx5_eqe) +
2540 sizeof(struct mlx5_ib_uapi_devx_async_event_hdr);
2541 event_data = &event->hdr;
2542 }
2543
2544 if (eventsz > count) {
2545 spin_unlock_irq(&ev_file->lock);
2546 return -EINVAL;
2547 }
2548
2549 if (omit_data)
2550 list_del_init(&event_sub->event_list);
2551 else
2552 list_del(&event->list);
2553
2554 spin_unlock_irq(&ev_file->lock);
2555
2556 if (copy_to_user(buf, event_data, eventsz))
2557 /* This points to an application issue, not a kernel concern */
2558 ret = -EFAULT;
2559 else
2560 ret = eventsz;
2561
2562 if (!omit_data)
2563 kfree(event);
2564 return ret;
2565 }
2566
devx_async_event_poll(struct file * filp,struct poll_table_struct * wait)2567 static __poll_t devx_async_event_poll(struct file *filp,
2568 struct poll_table_struct *wait)
2569 {
2570 struct devx_async_event_file *ev_file = filp->private_data;
2571 __poll_t pollflags = 0;
2572
2573 poll_wait(filp, &ev_file->poll_wait, wait);
2574
2575 spin_lock_irq(&ev_file->lock);
2576 if (ev_file->is_destroyed)
2577 pollflags = EPOLLIN | EPOLLRDNORM | EPOLLRDHUP;
2578 else if (!list_empty(&ev_file->event_list))
2579 pollflags = EPOLLIN | EPOLLRDNORM;
2580 spin_unlock_irq(&ev_file->lock);
2581
2582 return pollflags;
2583 }
2584
devx_free_subscription(struct rcu_head * rcu)2585 static void devx_free_subscription(struct rcu_head *rcu)
2586 {
2587 struct devx_event_subscription *event_sub =
2588 container_of(rcu, struct devx_event_subscription, rcu);
2589
2590 if (event_sub->eventfd)
2591 eventfd_ctx_put(event_sub->eventfd);
2592 uverbs_uobject_put(&event_sub->ev_file->uobj);
2593 kfree(event_sub);
2594 }
2595
2596 static const struct file_operations devx_async_event_fops = {
2597 .owner = THIS_MODULE,
2598 .read = devx_async_event_read,
2599 .poll = devx_async_event_poll,
2600 .release = uverbs_uobject_fd_release,
2601 .llseek = no_llseek,
2602 };
2603
devx_async_cmd_event_destroy_uobj(struct ib_uobject * uobj,enum rdma_remove_reason why)2604 static int devx_async_cmd_event_destroy_uobj(struct ib_uobject *uobj,
2605 enum rdma_remove_reason why)
2606 {
2607 struct devx_async_cmd_event_file *comp_ev_file =
2608 container_of(uobj, struct devx_async_cmd_event_file,
2609 uobj);
2610 struct devx_async_event_queue *ev_queue = &comp_ev_file->ev_queue;
2611 struct devx_async_data *entry, *tmp;
2612
2613 spin_lock_irq(&ev_queue->lock);
2614 ev_queue->is_destroyed = 1;
2615 spin_unlock_irq(&ev_queue->lock);
2616 wake_up_interruptible(&ev_queue->poll_wait);
2617
2618 mlx5_cmd_cleanup_async_ctx(&comp_ev_file->async_ctx);
2619
2620 spin_lock_irq(&comp_ev_file->ev_queue.lock);
2621 list_for_each_entry_safe(entry, tmp,
2622 &comp_ev_file->ev_queue.event_list, list) {
2623 list_del(&entry->list);
2624 kvfree(entry);
2625 }
2626 spin_unlock_irq(&comp_ev_file->ev_queue.lock);
2627 return 0;
2628 };
2629
devx_async_event_destroy_uobj(struct ib_uobject * uobj,enum rdma_remove_reason why)2630 static int devx_async_event_destroy_uobj(struct ib_uobject *uobj,
2631 enum rdma_remove_reason why)
2632 {
2633 struct devx_async_event_file *ev_file =
2634 container_of(uobj, struct devx_async_event_file,
2635 uobj);
2636 struct devx_event_subscription *event_sub, *event_sub_tmp;
2637 struct mlx5_ib_dev *dev = ev_file->dev;
2638
2639 spin_lock_irq(&ev_file->lock);
2640 ev_file->is_destroyed = 1;
2641
2642 /* free the pending events allocation */
2643 if (ev_file->omit_data) {
2644 struct devx_event_subscription *event_sub, *tmp;
2645
2646 list_for_each_entry_safe(event_sub, tmp, &ev_file->event_list,
2647 event_list)
2648 list_del_init(&event_sub->event_list);
2649
2650 } else {
2651 struct devx_async_event_data *entry, *tmp;
2652
2653 list_for_each_entry_safe(entry, tmp, &ev_file->event_list,
2654 list) {
2655 list_del(&entry->list);
2656 kfree(entry);
2657 }
2658 }
2659
2660 spin_unlock_irq(&ev_file->lock);
2661 wake_up_interruptible(&ev_file->poll_wait);
2662
2663 mutex_lock(&dev->devx_event_table.event_xa_lock);
2664 /* delete the subscriptions which are related to this FD */
2665 list_for_each_entry_safe(event_sub, event_sub_tmp,
2666 &ev_file->subscribed_events_list, file_list) {
2667 devx_cleanup_subscription(dev, event_sub);
2668 list_del_rcu(&event_sub->file_list);
2669 /* subscription may not be used by the read API any more */
2670 call_rcu(&event_sub->rcu, devx_free_subscription);
2671 }
2672 mutex_unlock(&dev->devx_event_table.event_xa_lock);
2673
2674 put_device(&dev->ib_dev.dev);
2675 return 0;
2676 };
2677
2678 DECLARE_UVERBS_NAMED_METHOD(
2679 MLX5_IB_METHOD_DEVX_UMEM_REG,
2680 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE,
2681 MLX5_IB_OBJECT_DEVX_UMEM,
2682 UVERBS_ACCESS_NEW,
2683 UA_MANDATORY),
2684 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_ADDR,
2685 UVERBS_ATTR_TYPE(u64),
2686 UA_MANDATORY),
2687 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_LEN,
2688 UVERBS_ATTR_TYPE(u64),
2689 UA_MANDATORY),
2690 UVERBS_ATTR_FLAGS_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_ACCESS,
2691 enum ib_access_flags),
2692 UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_DEVX_UMEM_REG_OUT_ID,
2693 UVERBS_ATTR_TYPE(u32),
2694 UA_MANDATORY));
2695
2696 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
2697 MLX5_IB_METHOD_DEVX_UMEM_DEREG,
2698 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_UMEM_DEREG_HANDLE,
2699 MLX5_IB_OBJECT_DEVX_UMEM,
2700 UVERBS_ACCESS_DESTROY,
2701 UA_MANDATORY));
2702
2703 DECLARE_UVERBS_NAMED_METHOD(
2704 MLX5_IB_METHOD_DEVX_QUERY_EQN,
2705 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_QUERY_EQN_USER_VEC,
2706 UVERBS_ATTR_TYPE(u32),
2707 UA_MANDATORY),
2708 UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_DEVX_QUERY_EQN_DEV_EQN,
2709 UVERBS_ATTR_TYPE(u32),
2710 UA_MANDATORY));
2711
2712 DECLARE_UVERBS_NAMED_METHOD(
2713 MLX5_IB_METHOD_DEVX_QUERY_UAR,
2714 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_QUERY_UAR_USER_IDX,
2715 UVERBS_ATTR_TYPE(u32),
2716 UA_MANDATORY),
2717 UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_DEVX_QUERY_UAR_DEV_IDX,
2718 UVERBS_ATTR_TYPE(u32),
2719 UA_MANDATORY));
2720
2721 DECLARE_UVERBS_NAMED_METHOD(
2722 MLX5_IB_METHOD_DEVX_OTHER,
2723 UVERBS_ATTR_PTR_IN(
2724 MLX5_IB_ATTR_DEVX_OTHER_CMD_IN,
2725 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2726 UA_MANDATORY,
2727 UA_ALLOC_AND_COPY),
2728 UVERBS_ATTR_PTR_OUT(
2729 MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT,
2730 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
2731 UA_MANDATORY));
2732
2733 DECLARE_UVERBS_NAMED_METHOD(
2734 MLX5_IB_METHOD_DEVX_OBJ_CREATE,
2735 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_CREATE_HANDLE,
2736 MLX5_IB_OBJECT_DEVX_OBJ,
2737 UVERBS_ACCESS_NEW,
2738 UA_MANDATORY),
2739 UVERBS_ATTR_PTR_IN(
2740 MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN,
2741 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2742 UA_MANDATORY,
2743 UA_ALLOC_AND_COPY),
2744 UVERBS_ATTR_PTR_OUT(
2745 MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT,
2746 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
2747 UA_MANDATORY));
2748
2749 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
2750 MLX5_IB_METHOD_DEVX_OBJ_DESTROY,
2751 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_DESTROY_HANDLE,
2752 MLX5_IB_OBJECT_DEVX_OBJ,
2753 UVERBS_ACCESS_DESTROY,
2754 UA_MANDATORY));
2755
2756 DECLARE_UVERBS_NAMED_METHOD(
2757 MLX5_IB_METHOD_DEVX_OBJ_MODIFY,
2758 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_MODIFY_HANDLE,
2759 UVERBS_IDR_ANY_OBJECT,
2760 UVERBS_ACCESS_WRITE,
2761 UA_MANDATORY),
2762 UVERBS_ATTR_PTR_IN(
2763 MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN,
2764 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2765 UA_MANDATORY,
2766 UA_ALLOC_AND_COPY),
2767 UVERBS_ATTR_PTR_OUT(
2768 MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT,
2769 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
2770 UA_MANDATORY));
2771
2772 DECLARE_UVERBS_NAMED_METHOD(
2773 MLX5_IB_METHOD_DEVX_OBJ_QUERY,
2774 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_QUERY_HANDLE,
2775 UVERBS_IDR_ANY_OBJECT,
2776 UVERBS_ACCESS_READ,
2777 UA_MANDATORY),
2778 UVERBS_ATTR_PTR_IN(
2779 MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN,
2780 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2781 UA_MANDATORY,
2782 UA_ALLOC_AND_COPY),
2783 UVERBS_ATTR_PTR_OUT(
2784 MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT,
2785 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
2786 UA_MANDATORY));
2787
2788 DECLARE_UVERBS_NAMED_METHOD(
2789 MLX5_IB_METHOD_DEVX_OBJ_ASYNC_QUERY,
2790 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_QUERY_HANDLE,
2791 UVERBS_IDR_ANY_OBJECT,
2792 UVERBS_ACCESS_READ,
2793 UA_MANDATORY),
2794 UVERBS_ATTR_PTR_IN(
2795 MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN,
2796 UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
2797 UA_MANDATORY,
2798 UA_ALLOC_AND_COPY),
2799 UVERBS_ATTR_CONST_IN(MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_OUT_LEN,
2800 u16, UA_MANDATORY),
2801 UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_FD,
2802 MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
2803 UVERBS_ACCESS_READ,
2804 UA_MANDATORY),
2805 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_OBJ_QUERY_ASYNC_WR_ID,
2806 UVERBS_ATTR_TYPE(u64),
2807 UA_MANDATORY));
2808
2809 DECLARE_UVERBS_NAMED_METHOD(
2810 MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT,
2811 UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_HANDLE,
2812 MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
2813 UVERBS_ACCESS_READ,
2814 UA_MANDATORY),
2815 UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_OBJ_HANDLE,
2816 MLX5_IB_OBJECT_DEVX_OBJ,
2817 UVERBS_ACCESS_READ,
2818 UA_OPTIONAL),
2819 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_TYPE_NUM_LIST,
2820 UVERBS_ATTR_MIN_SIZE(sizeof(u16)),
2821 UA_MANDATORY,
2822 UA_ALLOC_AND_COPY),
2823 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_COOKIE,
2824 UVERBS_ATTR_TYPE(u64),
2825 UA_OPTIONAL),
2826 UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_SUBSCRIBE_EVENT_FD_NUM,
2827 UVERBS_ATTR_TYPE(u32),
2828 UA_OPTIONAL));
2829
2830 DECLARE_UVERBS_GLOBAL_METHODS(MLX5_IB_OBJECT_DEVX,
2831 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OTHER),
2832 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_QUERY_UAR),
2833 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_QUERY_EQN),
2834 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT));
2835
2836 DECLARE_UVERBS_NAMED_OBJECT(MLX5_IB_OBJECT_DEVX_OBJ,
2837 UVERBS_TYPE_ALLOC_IDR(devx_obj_cleanup),
2838 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_CREATE),
2839 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_DESTROY),
2840 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_MODIFY),
2841 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_QUERY),
2842 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OBJ_ASYNC_QUERY));
2843
2844 DECLARE_UVERBS_NAMED_OBJECT(MLX5_IB_OBJECT_DEVX_UMEM,
2845 UVERBS_TYPE_ALLOC_IDR(devx_umem_cleanup),
2846 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_UMEM_REG),
2847 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_UMEM_DEREG));
2848
2849
2850 DECLARE_UVERBS_NAMED_METHOD(
2851 MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC,
2852 UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_ASYNC_CMD_FD_ALLOC_HANDLE,
2853 MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
2854 UVERBS_ACCESS_NEW,
2855 UA_MANDATORY));
2856
2857 DECLARE_UVERBS_NAMED_OBJECT(
2858 MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
2859 UVERBS_TYPE_ALLOC_FD(sizeof(struct devx_async_cmd_event_file),
2860 devx_async_cmd_event_destroy_uobj,
2861 &devx_async_cmd_event_fops, "[devx_async_cmd]",
2862 O_RDONLY),
2863 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC));
2864
2865 DECLARE_UVERBS_NAMED_METHOD(
2866 MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC,
2867 UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_HANDLE,
2868 MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
2869 UVERBS_ACCESS_NEW,
2870 UA_MANDATORY),
2871 UVERBS_ATTR_FLAGS_IN(MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_FLAGS,
2872 enum mlx5_ib_uapi_devx_create_event_channel_flags,
2873 UA_MANDATORY));
2874
2875 DECLARE_UVERBS_NAMED_OBJECT(
2876 MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
2877 UVERBS_TYPE_ALLOC_FD(sizeof(struct devx_async_event_file),
2878 devx_async_event_destroy_uobj,
2879 &devx_async_event_fops, "[devx_async_event]",
2880 O_RDONLY),
2881 &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC));
2882
devx_is_supported(struct ib_device * device)2883 static bool devx_is_supported(struct ib_device *device)
2884 {
2885 struct mlx5_ib_dev *dev = to_mdev(device);
2886
2887 return MLX5_CAP_GEN(dev->mdev, log_max_uctx);
2888 }
2889
2890 const struct uapi_definition mlx5_ib_devx_defs[] = {
2891 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
2892 MLX5_IB_OBJECT_DEVX,
2893 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
2894 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
2895 MLX5_IB_OBJECT_DEVX_OBJ,
2896 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
2897 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
2898 MLX5_IB_OBJECT_DEVX_UMEM,
2899 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
2900 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
2901 MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
2902 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
2903 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
2904 MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
2905 UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
2906 {},
2907 };
2908