1// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
2/*
3 * Copyright (c) 2013-2018, Mellanox Technologies inc. All rights reserved.
4 */
5
6#include <linux/kernel.h>
7#include <linux/mlx5/driver.h>
8#include "mlx5_ib.h"
9#include "srq.h"
10#include "qp.h"
11
12static int get_pas_size(struct mlx5_srq_attr *in)
13{
14 u32 log_page_size = in->log_page_size + 12;
15 u32 log_srq_size = in->log_size;
16 u32 log_rq_stride = in->wqe_shift;
17 u32 page_offset = in->page_offset;
18 u32 po_quanta = 1 << (log_page_size - 6);
19 u32 rq_sz = 1 << (log_srq_size + 4 + log_rq_stride);
20 u32 page_size = 1 << log_page_size;
21 u32 rq_sz_po = rq_sz + (page_offset * po_quanta);
22 u32 rq_num_pas = DIV_ROUND_UP(rq_sz_po, page_size);
23
24 return rq_num_pas * sizeof(u64);
25}
26
27static void set_wq(void *wq, struct mlx5_srq_attr *in)
28{
29 MLX5_SET(wq, wq, wq_signature, !!(in->flags
30 & MLX5_SRQ_FLAG_WQ_SIG));
31 MLX5_SET(wq, wq, log_wq_pg_sz, in->log_page_size);
32 MLX5_SET(wq, wq, log_wq_stride, in->wqe_shift + 4);
33 MLX5_SET(wq, wq, log_wq_sz, in->log_size);
34 MLX5_SET(wq, wq, page_offset, in->page_offset);
35 MLX5_SET(wq, wq, lwm, in->lwm);
36 MLX5_SET(wq, wq, pd, in->pd);
37 MLX5_SET64(wq, wq, dbr_addr, in->db_record);
38}
39
40static void set_srqc(void *srqc, struct mlx5_srq_attr *in)
41{
42 MLX5_SET(srqc, srqc, wq_signature, !!(in->flags
43 & MLX5_SRQ_FLAG_WQ_SIG));
44 MLX5_SET(srqc, srqc, log_page_size, in->log_page_size);
45 MLX5_SET(srqc, srqc, log_rq_stride, in->wqe_shift);
46 MLX5_SET(srqc, srqc, log_srq_size, in->log_size);
47 MLX5_SET(srqc, srqc, page_offset, in->page_offset);
48 MLX5_SET(srqc, srqc, lwm, in->lwm);
49 MLX5_SET(srqc, srqc, pd, in->pd);
50 MLX5_SET64(srqc, srqc, dbr_addr, in->db_record);
51 MLX5_SET(srqc, srqc, xrcd, in->xrcd);
52 MLX5_SET(srqc, srqc, cqn, in->cqn);
53}
54
55static void get_wq(void *wq, struct mlx5_srq_attr *in)
56{
57 if (MLX5_GET(wq, wq, wq_signature))
58 in->flags &= MLX5_SRQ_FLAG_WQ_SIG;
59 in->log_page_size = MLX5_GET(wq, wq, log_wq_pg_sz);
60 in->wqe_shift = MLX5_GET(wq, wq, log_wq_stride) - 4;
61 in->log_size = MLX5_GET(wq, wq, log_wq_sz);
62 in->page_offset = MLX5_GET(wq, wq, page_offset);
63 in->lwm = MLX5_GET(wq, wq, lwm);
64 in->pd = MLX5_GET(wq, wq, pd);
65 in->db_record = MLX5_GET64(wq, wq, dbr_addr);
66}
67
68static void get_srqc(void *srqc, struct mlx5_srq_attr *in)
69{
70 if (MLX5_GET(srqc, srqc, wq_signature))
71 in->flags &= MLX5_SRQ_FLAG_WQ_SIG;
72 in->log_page_size = MLX5_GET(srqc, srqc, log_page_size);
73 in->wqe_shift = MLX5_GET(srqc, srqc, log_rq_stride);
74 in->log_size = MLX5_GET(srqc, srqc, log_srq_size);
75 in->page_offset = MLX5_GET(srqc, srqc, page_offset);
76 in->lwm = MLX5_GET(srqc, srqc, lwm);
77 in->pd = MLX5_GET(srqc, srqc, pd);
78 in->db_record = MLX5_GET64(srqc, srqc, dbr_addr);
79}
80
81struct mlx5_core_srq *mlx5_cmd_get_srq(struct mlx5_ib_dev *dev, u32 srqn)
82{
83 struct mlx5_srq_table *table = &dev->srq_table;
84 struct mlx5_core_srq *srq;
85
86 xa_lock_irq(&table->array);
87 srq = xa_load(&table->array, index: srqn);
88 if (srq)
89 refcount_inc(r: &srq->common.refcount);
90 xa_unlock_irq(&table->array);
91
92 return srq;
93}
94
95static int __set_srq_page_size(struct mlx5_srq_attr *in,
96 unsigned long page_size)
97{
98 if (!page_size)
99 return -EINVAL;
100 in->log_page_size = order_base_2(page_size) - MLX5_ADAPTER_PAGE_SHIFT;
101
102 if (WARN_ON(get_pas_size(in) !=
103 ib_umem_num_dma_blocks(in->umem, page_size) * sizeof(u64)))
104 return -EINVAL;
105 return 0;
106}
107
108#define set_srq_page_size(in, typ, log_pgsz_fld) \
109 __set_srq_page_size(in, mlx5_umem_find_best_quantized_pgoff( \
110 (in)->umem, typ, log_pgsz_fld, \
111 MLX5_ADAPTER_PAGE_SHIFT, page_offset, \
112 64, &(in)->page_offset))
113
114static int create_srq_cmd(struct mlx5_ib_dev *dev, struct mlx5_core_srq *srq,
115 struct mlx5_srq_attr *in)
116{
117 u32 create_out[MLX5_ST_SZ_DW(create_srq_out)] = {0};
118 void *create_in;
119 void *srqc;
120 void *pas;
121 int pas_size;
122 int inlen;
123 int err;
124
125 if (in->umem) {
126 err = set_srq_page_size(in, srqc, log_page_size);
127 if (err)
128 return err;
129 }
130
131 pas_size = get_pas_size(in);
132 inlen = MLX5_ST_SZ_BYTES(create_srq_in) + pas_size;
133 create_in = kvzalloc(inlen, GFP_KERNEL);
134 if (!create_in)
135 return -ENOMEM;
136
137 MLX5_SET(create_srq_in, create_in, uid, in->uid);
138 srqc = MLX5_ADDR_OF(create_srq_in, create_in, srq_context_entry);
139 pas = MLX5_ADDR_OF(create_srq_in, create_in, pas);
140
141 set_srqc(srqc, in);
142 if (in->umem)
143 mlx5_ib_populate_pas(
144 umem: in->umem,
145 page_size: 1UL << (in->log_page_size + MLX5_ADAPTER_PAGE_SHIFT),
146 pas, access_flags: 0);
147 else
148 memcpy(pas, in->pas, pas_size);
149
150 MLX5_SET(create_srq_in, create_in, opcode,
151 MLX5_CMD_OP_CREATE_SRQ);
152
153 err = mlx5_cmd_exec(dev: dev->mdev, in: create_in, in_size: inlen, out: create_out,
154 out_size: sizeof(create_out));
155 kvfree(addr: create_in);
156 if (!err) {
157 srq->srqn = MLX5_GET(create_srq_out, create_out, srqn);
158 srq->uid = in->uid;
159 }
160
161 return err;
162}
163
164static int destroy_srq_cmd(struct mlx5_ib_dev *dev, struct mlx5_core_srq *srq)
165{
166 u32 in[MLX5_ST_SZ_DW(destroy_srq_in)] = {};
167
168 MLX5_SET(destroy_srq_in, in, opcode, MLX5_CMD_OP_DESTROY_SRQ);
169 MLX5_SET(destroy_srq_in, in, srqn, srq->srqn);
170 MLX5_SET(destroy_srq_in, in, uid, srq->uid);
171
172 return mlx5_cmd_exec_in(dev->mdev, destroy_srq, in);
173}
174
175static int arm_srq_cmd(struct mlx5_ib_dev *dev, struct mlx5_core_srq *srq,
176 u16 lwm, int is_srq)
177{
178 u32 in[MLX5_ST_SZ_DW(arm_rq_in)] = {};
179
180 MLX5_SET(arm_rq_in, in, opcode, MLX5_CMD_OP_ARM_RQ);
181 MLX5_SET(arm_rq_in, in, op_mod, MLX5_ARM_RQ_IN_OP_MOD_SRQ);
182 MLX5_SET(arm_rq_in, in, srq_number, srq->srqn);
183 MLX5_SET(arm_rq_in, in, lwm, lwm);
184 MLX5_SET(arm_rq_in, in, uid, srq->uid);
185
186 return mlx5_cmd_exec_in(dev->mdev, arm_rq, in);
187}
188
189static int query_srq_cmd(struct mlx5_ib_dev *dev, struct mlx5_core_srq *srq,
190 struct mlx5_srq_attr *out)
191{
192 u32 in[MLX5_ST_SZ_DW(query_srq_in)] = {};
193 u32 *srq_out;
194 void *srqc;
195 int err;
196
197 srq_out = kvzalloc(MLX5_ST_SZ_BYTES(query_srq_out), GFP_KERNEL);
198 if (!srq_out)
199 return -ENOMEM;
200
201 MLX5_SET(query_srq_in, in, opcode, MLX5_CMD_OP_QUERY_SRQ);
202 MLX5_SET(query_srq_in, in, srqn, srq->srqn);
203 err = mlx5_cmd_exec_inout(dev->mdev, query_srq, in, srq_out);
204 if (err)
205 goto out;
206
207 srqc = MLX5_ADDR_OF(query_srq_out, srq_out, srq_context_entry);
208 get_srqc(srqc, in: out);
209 if (MLX5_GET(srqc, srqc, state) != MLX5_SRQC_STATE_GOOD)
210 out->flags |= MLX5_SRQ_FLAG_ERR;
211out:
212 kvfree(addr: srq_out);
213 return err;
214}
215
216static int create_xrc_srq_cmd(struct mlx5_ib_dev *dev,
217 struct mlx5_core_srq *srq,
218 struct mlx5_srq_attr *in)
219{
220 u32 create_out[MLX5_ST_SZ_DW(create_xrc_srq_out)];
221 void *create_in;
222 void *xrc_srqc;
223 void *pas;
224 int pas_size;
225 int inlen;
226 int err;
227
228 if (in->umem) {
229 err = set_srq_page_size(in, xrc_srqc, log_page_size);
230 if (err)
231 return err;
232 }
233
234 pas_size = get_pas_size(in);
235 inlen = MLX5_ST_SZ_BYTES(create_xrc_srq_in) + pas_size;
236 create_in = kvzalloc(inlen, GFP_KERNEL);
237 if (!create_in)
238 return -ENOMEM;
239
240 MLX5_SET(create_xrc_srq_in, create_in, uid, in->uid);
241 xrc_srqc = MLX5_ADDR_OF(create_xrc_srq_in, create_in,
242 xrc_srq_context_entry);
243 pas = MLX5_ADDR_OF(create_xrc_srq_in, create_in, pas);
244
245 set_srqc(srqc: xrc_srqc, in);
246 MLX5_SET(xrc_srqc, xrc_srqc, user_index, in->user_index);
247 if (in->umem)
248 mlx5_ib_populate_pas(
249 umem: in->umem,
250 page_size: 1UL << (in->log_page_size + MLX5_ADAPTER_PAGE_SHIFT),
251 pas, access_flags: 0);
252 else
253 memcpy(pas, in->pas, pas_size);
254 MLX5_SET(create_xrc_srq_in, create_in, opcode,
255 MLX5_CMD_OP_CREATE_XRC_SRQ);
256
257 memset(create_out, 0, sizeof(create_out));
258 err = mlx5_cmd_exec(dev: dev->mdev, in: create_in, in_size: inlen, out: create_out,
259 out_size: sizeof(create_out));
260 if (err)
261 goto out;
262
263 srq->srqn = MLX5_GET(create_xrc_srq_out, create_out, xrc_srqn);
264 srq->uid = in->uid;
265out:
266 kvfree(addr: create_in);
267 return err;
268}
269
270static int destroy_xrc_srq_cmd(struct mlx5_ib_dev *dev,
271 struct mlx5_core_srq *srq)
272{
273 u32 in[MLX5_ST_SZ_DW(destroy_xrc_srq_in)] = {};
274
275 MLX5_SET(destroy_xrc_srq_in, in, opcode, MLX5_CMD_OP_DESTROY_XRC_SRQ);
276 MLX5_SET(destroy_xrc_srq_in, in, xrc_srqn, srq->srqn);
277 MLX5_SET(destroy_xrc_srq_in, in, uid, srq->uid);
278
279 return mlx5_cmd_exec_in(dev->mdev, destroy_xrc_srq, in);
280}
281
282static int arm_xrc_srq_cmd(struct mlx5_ib_dev *dev, struct mlx5_core_srq *srq,
283 u16 lwm)
284{
285 u32 in[MLX5_ST_SZ_DW(arm_xrc_srq_in)] = {};
286
287 MLX5_SET(arm_xrc_srq_in, in, opcode, MLX5_CMD_OP_ARM_XRC_SRQ);
288 MLX5_SET(arm_xrc_srq_in, in, op_mod,
289 MLX5_ARM_XRC_SRQ_IN_OP_MOD_XRC_SRQ);
290 MLX5_SET(arm_xrc_srq_in, in, xrc_srqn, srq->srqn);
291 MLX5_SET(arm_xrc_srq_in, in, lwm, lwm);
292 MLX5_SET(arm_xrc_srq_in, in, uid, srq->uid);
293
294 return mlx5_cmd_exec_in(dev->mdev, arm_xrc_srq, in);
295}
296
297static int query_xrc_srq_cmd(struct mlx5_ib_dev *dev,
298 struct mlx5_core_srq *srq,
299 struct mlx5_srq_attr *out)
300{
301 u32 in[MLX5_ST_SZ_DW(query_xrc_srq_in)] = {};
302 u32 *xrcsrq_out;
303 void *xrc_srqc;
304 int err;
305
306 xrcsrq_out = kvzalloc(MLX5_ST_SZ_BYTES(query_xrc_srq_out), GFP_KERNEL);
307 if (!xrcsrq_out)
308 return -ENOMEM;
309
310 MLX5_SET(query_xrc_srq_in, in, opcode, MLX5_CMD_OP_QUERY_XRC_SRQ);
311 MLX5_SET(query_xrc_srq_in, in, xrc_srqn, srq->srqn);
312
313 err = mlx5_cmd_exec_inout(dev->mdev, query_xrc_srq, in, xrcsrq_out);
314 if (err)
315 goto out;
316
317 xrc_srqc = MLX5_ADDR_OF(query_xrc_srq_out, xrcsrq_out,
318 xrc_srq_context_entry);
319 get_srqc(srqc: xrc_srqc, in: out);
320 if (MLX5_GET(xrc_srqc, xrc_srqc, state) != MLX5_XRC_SRQC_STATE_GOOD)
321 out->flags |= MLX5_SRQ_FLAG_ERR;
322
323out:
324 kvfree(addr: xrcsrq_out);
325 return err;
326}
327
328static int create_rmp_cmd(struct mlx5_ib_dev *dev, struct mlx5_core_srq *srq,
329 struct mlx5_srq_attr *in)
330{
331 void *create_out = NULL;
332 void *create_in = NULL;
333 void *rmpc;
334 void *wq;
335 void *pas;
336 int pas_size;
337 int outlen;
338 int inlen;
339 int err;
340
341 if (in->umem) {
342 err = set_srq_page_size(in, wq, log_wq_pg_sz);
343 if (err)
344 return err;
345 }
346
347 pas_size = get_pas_size(in);
348 inlen = MLX5_ST_SZ_BYTES(create_rmp_in) + pas_size;
349 outlen = MLX5_ST_SZ_BYTES(create_rmp_out);
350 create_in = kvzalloc(inlen, GFP_KERNEL);
351 create_out = kvzalloc(outlen, GFP_KERNEL);
352 if (!create_in || !create_out) {
353 err = -ENOMEM;
354 goto out;
355 }
356
357 rmpc = MLX5_ADDR_OF(create_rmp_in, create_in, ctx);
358 wq = MLX5_ADDR_OF(rmpc, rmpc, wq);
359
360 MLX5_SET(rmpc, rmpc, state, MLX5_RMPC_STATE_RDY);
361 MLX5_SET(create_rmp_in, create_in, uid, in->uid);
362 pas = MLX5_ADDR_OF(rmpc, rmpc, wq.pas);
363
364 set_wq(wq, in);
365 if (in->umem)
366 mlx5_ib_populate_pas(
367 umem: in->umem,
368 page_size: 1UL << (in->log_page_size + MLX5_ADAPTER_PAGE_SHIFT),
369 pas, access_flags: 0);
370 else
371 memcpy(pas, in->pas, pas_size);
372
373 MLX5_SET(create_rmp_in, create_in, opcode, MLX5_CMD_OP_CREATE_RMP);
374 err = mlx5_cmd_exec(dev: dev->mdev, in: create_in, in_size: inlen, out: create_out, out_size: outlen);
375 if (!err) {
376 srq->srqn = MLX5_GET(create_rmp_out, create_out, rmpn);
377 srq->uid = in->uid;
378 }
379
380out:
381 kvfree(addr: create_in);
382 kvfree(addr: create_out);
383 return err;
384}
385
386static int destroy_rmp_cmd(struct mlx5_ib_dev *dev, struct mlx5_core_srq *srq)
387{
388 u32 in[MLX5_ST_SZ_DW(destroy_rmp_in)] = {};
389
390 MLX5_SET(destroy_rmp_in, in, opcode, MLX5_CMD_OP_DESTROY_RMP);
391 MLX5_SET(destroy_rmp_in, in, rmpn, srq->srqn);
392 MLX5_SET(destroy_rmp_in, in, uid, srq->uid);
393 return mlx5_cmd_exec_in(dev->mdev, destroy_rmp, in);
394}
395
396static int arm_rmp_cmd(struct mlx5_ib_dev *dev, struct mlx5_core_srq *srq,
397 u16 lwm)
398{
399 void *out = NULL;
400 void *in = NULL;
401 void *rmpc;
402 void *wq;
403 void *bitmask;
404 int outlen;
405 int inlen;
406 int err;
407
408 inlen = MLX5_ST_SZ_BYTES(modify_rmp_in);
409 outlen = MLX5_ST_SZ_BYTES(modify_rmp_out);
410
411 in = kvzalloc(inlen, GFP_KERNEL);
412 out = kvzalloc(outlen, GFP_KERNEL);
413 if (!in || !out) {
414 err = -ENOMEM;
415 goto out;
416 }
417
418 rmpc = MLX5_ADDR_OF(modify_rmp_in, in, ctx);
419 bitmask = MLX5_ADDR_OF(modify_rmp_in, in, bitmask);
420 wq = MLX5_ADDR_OF(rmpc, rmpc, wq);
421
422 MLX5_SET(modify_rmp_in, in, rmp_state, MLX5_RMPC_STATE_RDY);
423 MLX5_SET(modify_rmp_in, in, rmpn, srq->srqn);
424 MLX5_SET(modify_rmp_in, in, uid, srq->uid);
425 MLX5_SET(wq, wq, lwm, lwm);
426 MLX5_SET(rmp_bitmask, bitmask, lwm, 1);
427 MLX5_SET(rmpc, rmpc, state, MLX5_RMPC_STATE_RDY);
428 MLX5_SET(modify_rmp_in, in, opcode, MLX5_CMD_OP_MODIFY_RMP);
429
430 err = mlx5_cmd_exec_inout(dev->mdev, modify_rmp, in, out);
431
432out:
433 kvfree(addr: in);
434 kvfree(addr: out);
435 return err;
436}
437
438static int query_rmp_cmd(struct mlx5_ib_dev *dev, struct mlx5_core_srq *srq,
439 struct mlx5_srq_attr *out)
440{
441 u32 *rmp_out = NULL;
442 u32 *rmp_in = NULL;
443 void *rmpc;
444 int outlen;
445 int inlen;
446 int err;
447
448 outlen = MLX5_ST_SZ_BYTES(query_rmp_out);
449 inlen = MLX5_ST_SZ_BYTES(query_rmp_in);
450
451 rmp_out = kvzalloc(outlen, GFP_KERNEL);
452 rmp_in = kvzalloc(inlen, GFP_KERNEL);
453 if (!rmp_out || !rmp_in) {
454 err = -ENOMEM;
455 goto out;
456 }
457
458 MLX5_SET(query_rmp_in, rmp_in, opcode, MLX5_CMD_OP_QUERY_RMP);
459 MLX5_SET(query_rmp_in, rmp_in, rmpn, srq->srqn);
460 err = mlx5_cmd_exec_inout(dev->mdev, query_rmp, rmp_in, rmp_out);
461 if (err)
462 goto out;
463
464 rmpc = MLX5_ADDR_OF(query_rmp_out, rmp_out, rmp_context);
465 get_wq(MLX5_ADDR_OF(rmpc, rmpc, wq), in: out);
466 if (MLX5_GET(rmpc, rmpc, state) != MLX5_RMPC_STATE_RDY)
467 out->flags |= MLX5_SRQ_FLAG_ERR;
468
469out:
470 kvfree(addr: rmp_out);
471 kvfree(addr: rmp_in);
472 return err;
473}
474
475static int create_xrq_cmd(struct mlx5_ib_dev *dev, struct mlx5_core_srq *srq,
476 struct mlx5_srq_attr *in)
477{
478 u32 create_out[MLX5_ST_SZ_DW(create_xrq_out)] = {0};
479 void *create_in;
480 void *xrqc;
481 void *wq;
482 void *pas;
483 int pas_size;
484 int inlen;
485 int err;
486
487 if (in->umem) {
488 err = set_srq_page_size(in, wq, log_wq_pg_sz);
489 if (err)
490 return err;
491 }
492
493 pas_size = get_pas_size(in);
494 inlen = MLX5_ST_SZ_BYTES(create_xrq_in) + pas_size;
495 create_in = kvzalloc(inlen, GFP_KERNEL);
496 if (!create_in)
497 return -ENOMEM;
498
499 xrqc = MLX5_ADDR_OF(create_xrq_in, create_in, xrq_context);
500 wq = MLX5_ADDR_OF(xrqc, xrqc, wq);
501 pas = MLX5_ADDR_OF(xrqc, xrqc, wq.pas);
502
503 set_wq(wq, in);
504 if (in->umem)
505 mlx5_ib_populate_pas(
506 umem: in->umem,
507 page_size: 1UL << (in->log_page_size + MLX5_ADAPTER_PAGE_SHIFT),
508 pas, access_flags: 0);
509 else
510 memcpy(pas, in->pas, pas_size);
511
512 if (in->type == IB_SRQT_TM) {
513 MLX5_SET(xrqc, xrqc, topology, MLX5_XRQC_TOPOLOGY_TAG_MATCHING);
514 if (in->flags & MLX5_SRQ_FLAG_RNDV)
515 MLX5_SET(xrqc, xrqc, offload, MLX5_XRQC_OFFLOAD_RNDV);
516 MLX5_SET(xrqc, xrqc,
517 tag_matching_topology_context.log_matching_list_sz,
518 in->tm_log_list_size);
519 }
520 MLX5_SET(xrqc, xrqc, user_index, in->user_index);
521 MLX5_SET(xrqc, xrqc, cqn, in->cqn);
522 MLX5_SET(create_xrq_in, create_in, opcode, MLX5_CMD_OP_CREATE_XRQ);
523 MLX5_SET(create_xrq_in, create_in, uid, in->uid);
524 err = mlx5_cmd_exec(dev: dev->mdev, in: create_in, in_size: inlen, out: create_out,
525 out_size: sizeof(create_out));
526 kvfree(addr: create_in);
527 if (!err) {
528 srq->srqn = MLX5_GET(create_xrq_out, create_out, xrqn);
529 srq->uid = in->uid;
530 }
531
532 return err;
533}
534
535static int destroy_xrq_cmd(struct mlx5_ib_dev *dev, struct mlx5_core_srq *srq)
536{
537 u32 in[MLX5_ST_SZ_DW(destroy_xrq_in)] = {};
538
539 MLX5_SET(destroy_xrq_in, in, opcode, MLX5_CMD_OP_DESTROY_XRQ);
540 MLX5_SET(destroy_xrq_in, in, xrqn, srq->srqn);
541 MLX5_SET(destroy_xrq_in, in, uid, srq->uid);
542
543 return mlx5_cmd_exec_in(dev->mdev, destroy_xrq, in);
544}
545
546static int arm_xrq_cmd(struct mlx5_ib_dev *dev,
547 struct mlx5_core_srq *srq,
548 u16 lwm)
549{
550 u32 in[MLX5_ST_SZ_DW(arm_rq_in)] = {};
551
552 MLX5_SET(arm_rq_in, in, opcode, MLX5_CMD_OP_ARM_RQ);
553 MLX5_SET(arm_rq_in, in, op_mod, MLX5_ARM_RQ_IN_OP_MOD_XRQ);
554 MLX5_SET(arm_rq_in, in, srq_number, srq->srqn);
555 MLX5_SET(arm_rq_in, in, lwm, lwm);
556 MLX5_SET(arm_rq_in, in, uid, srq->uid);
557
558 return mlx5_cmd_exec_in(dev->mdev, arm_rq, in);
559}
560
561static int query_xrq_cmd(struct mlx5_ib_dev *dev, struct mlx5_core_srq *srq,
562 struct mlx5_srq_attr *out)
563{
564 u32 in[MLX5_ST_SZ_DW(query_xrq_in)] = {};
565 u32 *xrq_out;
566 int outlen = MLX5_ST_SZ_BYTES(query_xrq_out);
567 void *xrqc;
568 int err;
569
570 xrq_out = kvzalloc(outlen, GFP_KERNEL);
571 if (!xrq_out)
572 return -ENOMEM;
573
574 MLX5_SET(query_xrq_in, in, opcode, MLX5_CMD_OP_QUERY_XRQ);
575 MLX5_SET(query_xrq_in, in, xrqn, srq->srqn);
576
577 err = mlx5_cmd_exec_inout(dev->mdev, query_xrq, in, xrq_out);
578 if (err)
579 goto out;
580
581 xrqc = MLX5_ADDR_OF(query_xrq_out, xrq_out, xrq_context);
582 get_wq(MLX5_ADDR_OF(xrqc, xrqc, wq), in: out);
583 if (MLX5_GET(xrqc, xrqc, state) != MLX5_XRQC_STATE_GOOD)
584 out->flags |= MLX5_SRQ_FLAG_ERR;
585 out->tm_next_tag =
586 MLX5_GET(xrqc, xrqc,
587 tag_matching_topology_context.append_next_index);
588 out->tm_hw_phase_cnt =
589 MLX5_GET(xrqc, xrqc,
590 tag_matching_topology_context.hw_phase_cnt);
591 out->tm_sw_phase_cnt =
592 MLX5_GET(xrqc, xrqc,
593 tag_matching_topology_context.sw_phase_cnt);
594
595out:
596 kvfree(addr: xrq_out);
597 return err;
598}
599
600static int create_srq_split(struct mlx5_ib_dev *dev, struct mlx5_core_srq *srq,
601 struct mlx5_srq_attr *in)
602{
603 if (!dev->mdev->issi)
604 return create_srq_cmd(dev, srq, in);
605 switch (srq->common.res) {
606 case MLX5_RES_XSRQ:
607 return create_xrc_srq_cmd(dev, srq, in);
608 case MLX5_RES_XRQ:
609 return create_xrq_cmd(dev, srq, in);
610 default:
611 return create_rmp_cmd(dev, srq, in);
612 }
613}
614
615static int destroy_srq_split(struct mlx5_ib_dev *dev, struct mlx5_core_srq *srq)
616{
617 if (!dev->mdev->issi)
618 return destroy_srq_cmd(dev, srq);
619 switch (srq->common.res) {
620 case MLX5_RES_XSRQ:
621 return destroy_xrc_srq_cmd(dev, srq);
622 case MLX5_RES_XRQ:
623 return destroy_xrq_cmd(dev, srq);
624 default:
625 return destroy_rmp_cmd(dev, srq);
626 }
627}
628
629int mlx5_cmd_create_srq(struct mlx5_ib_dev *dev, struct mlx5_core_srq *srq,
630 struct mlx5_srq_attr *in)
631{
632 struct mlx5_srq_table *table = &dev->srq_table;
633 int err;
634
635 switch (in->type) {
636 case IB_SRQT_XRC:
637 srq->common.res = MLX5_RES_XSRQ;
638 break;
639 case IB_SRQT_TM:
640 srq->common.res = MLX5_RES_XRQ;
641 break;
642 default:
643 srq->common.res = MLX5_RES_SRQ;
644 }
645
646 err = create_srq_split(dev, srq, in);
647 if (err)
648 return err;
649
650 refcount_set(r: &srq->common.refcount, n: 1);
651 init_completion(x: &srq->common.free);
652
653 err = xa_err(entry: xa_store_irq(xa: &table->array, index: srq->srqn, entry: srq, GFP_KERNEL));
654 if (err)
655 goto err_destroy_srq_split;
656
657 return 0;
658
659err_destroy_srq_split:
660 destroy_srq_split(dev, srq);
661
662 return err;
663}
664
665int mlx5_cmd_destroy_srq(struct mlx5_ib_dev *dev, struct mlx5_core_srq *srq)
666{
667 struct mlx5_srq_table *table = &dev->srq_table;
668 struct mlx5_core_srq *tmp;
669 int err;
670
671 /* Delete entry, but leave index occupied */
672 tmp = xa_cmpxchg_irq(xa: &table->array, index: srq->srqn, old: srq, XA_ZERO_ENTRY, gfp: 0);
673 if (WARN_ON(tmp != srq))
674 return xa_err(entry: tmp) ?: -EINVAL;
675
676 err = destroy_srq_split(dev, srq);
677 if (err) {
678 /*
679 * We don't need to check returned result for an error,
680 * because we are storing in pre-allocated space xarray
681 * entry and it can't fail at this stage.
682 */
683 xa_cmpxchg_irq(xa: &table->array, index: srq->srqn, XA_ZERO_ENTRY, entry: srq, gfp: 0);
684 return err;
685 }
686 xa_erase_irq(xa: &table->array, index: srq->srqn);
687
688 mlx5_core_res_put(res: &srq->common);
689 wait_for_completion(&srq->common.free);
690 return 0;
691}
692
693int mlx5_cmd_query_srq(struct mlx5_ib_dev *dev, struct mlx5_core_srq *srq,
694 struct mlx5_srq_attr *out)
695{
696 if (!dev->mdev->issi)
697 return query_srq_cmd(dev, srq, out);
698 switch (srq->common.res) {
699 case MLX5_RES_XSRQ:
700 return query_xrc_srq_cmd(dev, srq, out);
701 case MLX5_RES_XRQ:
702 return query_xrq_cmd(dev, srq, out);
703 default:
704 return query_rmp_cmd(dev, srq, out);
705 }
706}
707
708int mlx5_cmd_arm_srq(struct mlx5_ib_dev *dev, struct mlx5_core_srq *srq,
709 u16 lwm, int is_srq)
710{
711 if (!dev->mdev->issi)
712 return arm_srq_cmd(dev, srq, lwm, is_srq);
713 switch (srq->common.res) {
714 case MLX5_RES_XSRQ:
715 return arm_xrc_srq_cmd(dev, srq, lwm);
716 case MLX5_RES_XRQ:
717 return arm_xrq_cmd(dev, srq, lwm);
718 default:
719 return arm_rmp_cmd(dev, srq, lwm);
720 }
721}
722
723static int srq_event_notifier(struct notifier_block *nb,
724 unsigned long type, void *data)
725{
726 struct mlx5_srq_table *table;
727 struct mlx5_core_srq *srq;
728 struct mlx5_eqe *eqe;
729 u32 srqn;
730
731 if (type != MLX5_EVENT_TYPE_SRQ_CATAS_ERROR &&
732 type != MLX5_EVENT_TYPE_SRQ_RQ_LIMIT)
733 return NOTIFY_DONE;
734
735 table = container_of(nb, struct mlx5_srq_table, nb);
736
737 eqe = data;
738 srqn = be32_to_cpu(eqe->data.qp_srq.qp_srq_n) & 0xffffff;
739
740 xa_lock(&table->array);
741 srq = xa_load(&table->array, index: srqn);
742 if (srq)
743 refcount_inc(r: &srq->common.refcount);
744 xa_unlock(&table->array);
745
746 if (!srq)
747 return NOTIFY_OK;
748
749 srq->event(srq, eqe->type);
750
751 mlx5_core_res_put(res: &srq->common);
752
753 return NOTIFY_OK;
754}
755
756int mlx5_init_srq_table(struct mlx5_ib_dev *dev)
757{
758 struct mlx5_srq_table *table = &dev->srq_table;
759
760 memset(table, 0, sizeof(*table));
761 xa_init_flags(xa: &table->array, XA_FLAGS_LOCK_IRQ);
762
763 table->nb.notifier_call = srq_event_notifier;
764 mlx5_notifier_register(dev: dev->mdev, nb: &table->nb);
765
766 return 0;
767}
768
769void mlx5_cleanup_srq_table(struct mlx5_ib_dev *dev)
770{
771 struct mlx5_srq_table *table = &dev->srq_table;
772
773 mlx5_notifier_unregister(dev: dev->mdev, nb: &table->nb);
774}
775

source code of linux/drivers/infiniband/hw/mlx5/srq_cmd.c