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33#include <linux/platform_device.h>
34#include <rdma/ib_umem.h>
35#include <rdma/uverbs_ioctl.h>
36#include "hns_roce_device.h"
37#include "hns_roce_cmd.h"
38#include "hns_roce_hem.h"
39#include "hns_roce_common.h"
40
41static u8 get_least_load_bankid_for_cq(struct hns_roce_bank *bank)
42{
43 u32 least_load = bank[0].inuse;
44 u8 bankid = 0;
45 u32 bankcnt;
46 u8 i;
47
48 for (i = 1; i < HNS_ROCE_CQ_BANK_NUM; i++) {
49 bankcnt = bank[i].inuse;
50 if (bankcnt < least_load) {
51 least_load = bankcnt;
52 bankid = i;
53 }
54 }
55
56 return bankid;
57}
58
59static int alloc_cqn(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq)
60{
61 struct hns_roce_cq_table *cq_table = &hr_dev->cq_table;
62 struct hns_roce_bank *bank;
63 u8 bankid;
64 int id;
65
66 mutex_lock(&cq_table->bank_mutex);
67 bankid = get_least_load_bankid_for_cq(cq_table->bank);
68 bank = &cq_table->bank[bankid];
69
70 id = ida_alloc_range(&bank->ida, bank->min, bank->max, GFP_KERNEL);
71 if (id < 0) {
72 mutex_unlock(&cq_table->bank_mutex);
73 return id;
74 }
75
76
77 hr_cq->cqn = (id << CQ_BANKID_SHIFT) | bankid;
78 bank->inuse++;
79 mutex_unlock(&cq_table->bank_mutex);
80
81 return 0;
82}
83
84static inline u8 get_cq_bankid(unsigned long cqn)
85{
86
87 return (u8)(cqn & GENMASK(1, 0));
88}
89
90static void free_cqn(struct hns_roce_dev *hr_dev, unsigned long cqn)
91{
92 struct hns_roce_cq_table *cq_table = &hr_dev->cq_table;
93 struct hns_roce_bank *bank;
94
95 bank = &cq_table->bank[get_cq_bankid(cqn)];
96
97 ida_free(&bank->ida, cqn >> CQ_BANKID_SHIFT);
98
99 mutex_lock(&cq_table->bank_mutex);
100 bank->inuse--;
101 mutex_unlock(&cq_table->bank_mutex);
102}
103
104static int alloc_cqc(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq)
105{
106 struct hns_roce_cq_table *cq_table = &hr_dev->cq_table;
107 struct ib_device *ibdev = &hr_dev->ib_dev;
108 struct hns_roce_cmd_mailbox *mailbox;
109 u64 mtts[MTT_MIN_COUNT] = { 0 };
110 dma_addr_t dma_handle;
111 int ret;
112
113 ret = hns_roce_mtr_find(hr_dev, &hr_cq->mtr, 0, mtts, ARRAY_SIZE(mtts),
114 &dma_handle);
115 if (!ret) {
116 ibdev_err(ibdev, "failed to find CQ mtr, ret = %d.\n", ret);
117 return -EINVAL;
118 }
119
120
121 ret = hns_roce_table_get(hr_dev, &cq_table->table, hr_cq->cqn);
122 if (ret) {
123 ibdev_err(ibdev, "failed to get CQ(0x%lx) context, ret = %d.\n",
124 hr_cq->cqn, ret);
125 goto err_out;
126 }
127
128 ret = xa_err(xa_store(&cq_table->array, hr_cq->cqn, hr_cq, GFP_KERNEL));
129 if (ret) {
130 ibdev_err(ibdev, "failed to xa_store CQ, ret = %d.\n", ret);
131 goto err_put;
132 }
133
134
135 mailbox = hns_roce_alloc_cmd_mailbox(hr_dev);
136 if (IS_ERR(mailbox)) {
137 ret = PTR_ERR(mailbox);
138 goto err_xa;
139 }
140
141 hr_dev->hw->write_cqc(hr_dev, hr_cq, mailbox->buf, mtts, dma_handle);
142
143
144 ret = hns_roce_cmd_mbox(hr_dev, mailbox->dma, 0, hr_cq->cqn, 0,
145 HNS_ROCE_CMD_CREATE_CQC, HNS_ROCE_CMD_TIMEOUT_MSECS);
146 hns_roce_free_cmd_mailbox(hr_dev, mailbox);
147 if (ret) {
148 ibdev_err(ibdev,
149 "failed to send create cmd for CQ(0x%lx), ret = %d.\n",
150 hr_cq->cqn, ret);
151 goto err_xa;
152 }
153
154 hr_cq->cons_index = 0;
155 hr_cq->arm_sn = 1;
156
157 refcount_set(&hr_cq->refcount, 1);
158 init_completion(&hr_cq->free);
159
160 return 0;
161
162err_xa:
163 xa_erase(&cq_table->array, hr_cq->cqn);
164
165err_put:
166 hns_roce_table_put(hr_dev, &cq_table->table, hr_cq->cqn);
167
168err_out:
169 return ret;
170}
171
172static void free_cqc(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq)
173{
174 struct hns_roce_cq_table *cq_table = &hr_dev->cq_table;
175 struct device *dev = hr_dev->dev;
176 int ret;
177
178 ret = hns_roce_cmd_mbox(hr_dev, 0, 0, hr_cq->cqn, 1,
179 HNS_ROCE_CMD_DESTROY_CQC,
180 HNS_ROCE_CMD_TIMEOUT_MSECS);
181 if (ret)
182 dev_err(dev, "DESTROY_CQ failed (%d) for CQN %06lx\n", ret,
183 hr_cq->cqn);
184
185 xa_erase(&cq_table->array, hr_cq->cqn);
186
187
188 synchronize_irq(hr_dev->eq_table.eq[hr_cq->vector].irq);
189
190
191 if (refcount_dec_and_test(&hr_cq->refcount))
192 complete(&hr_cq->free);
193 wait_for_completion(&hr_cq->free);
194
195 hns_roce_table_put(hr_dev, &cq_table->table, hr_cq->cqn);
196}
197
198static int alloc_cq_buf(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq,
199 struct ib_udata *udata, unsigned long addr)
200{
201 struct ib_device *ibdev = &hr_dev->ib_dev;
202 struct hns_roce_buf_attr buf_attr = {};
203 int ret;
204
205 buf_attr.page_shift = hr_dev->caps.cqe_buf_pg_sz + PAGE_SHIFT;
206 buf_attr.region[0].size = hr_cq->cq_depth * hr_cq->cqe_size;
207 buf_attr.region[0].hopnum = hr_dev->caps.cqe_hop_num;
208 buf_attr.region_count = 1;
209
210 ret = hns_roce_mtr_create(hr_dev, &hr_cq->mtr, &buf_attr,
211 hr_dev->caps.cqe_ba_pg_sz + PAGE_SHIFT,
212 udata, addr);
213 if (ret)
214 ibdev_err(ibdev, "failed to alloc CQ mtr, ret = %d.\n", ret);
215
216 return ret;
217}
218
219static void free_cq_buf(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq)
220{
221 hns_roce_mtr_destroy(hr_dev, &hr_cq->mtr);
222}
223
224static int alloc_cq_db(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq,
225 struct ib_udata *udata, unsigned long addr,
226 struct hns_roce_ib_create_cq_resp *resp)
227{
228 bool has_db = hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_CQ_RECORD_DB;
229 struct hns_roce_ucontext *uctx;
230 int err;
231
232 if (udata) {
233 if (has_db &&
234 udata->outlen >= offsetofend(typeof(*resp), cap_flags)) {
235 uctx = rdma_udata_to_drv_context(udata,
236 struct hns_roce_ucontext, ibucontext);
237 err = hns_roce_db_map_user(uctx, addr, &hr_cq->db);
238 if (err)
239 return err;
240 hr_cq->flags |= HNS_ROCE_CQ_FLAG_RECORD_DB;
241 resp->cap_flags |= HNS_ROCE_CQ_FLAG_RECORD_DB;
242 }
243 } else {
244 if (has_db) {
245 err = hns_roce_alloc_db(hr_dev, &hr_cq->db, 1);
246 if (err)
247 return err;
248 hr_cq->set_ci_db = hr_cq->db.db_record;
249 *hr_cq->set_ci_db = 0;
250 hr_cq->flags |= HNS_ROCE_CQ_FLAG_RECORD_DB;
251 }
252 hr_cq->db_reg = hr_dev->reg_base + hr_dev->odb_offset +
253 DB_REG_OFFSET * hr_dev->priv_uar.index;
254 }
255
256 return 0;
257}
258
259static void free_cq_db(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq,
260 struct ib_udata *udata)
261{
262 struct hns_roce_ucontext *uctx;
263
264 if (!(hr_cq->flags & HNS_ROCE_CQ_FLAG_RECORD_DB))
265 return;
266
267 hr_cq->flags &= ~HNS_ROCE_CQ_FLAG_RECORD_DB;
268 if (udata) {
269 uctx = rdma_udata_to_drv_context(udata,
270 struct hns_roce_ucontext,
271 ibucontext);
272 hns_roce_db_unmap_user(uctx, &hr_cq->db);
273 } else {
274 hns_roce_free_db(hr_dev, &hr_cq->db);
275 }
276}
277
278static int verify_cq_create_attr(struct hns_roce_dev *hr_dev,
279 const struct ib_cq_init_attr *attr)
280{
281 struct ib_device *ibdev = &hr_dev->ib_dev;
282
283 if (!attr->cqe || attr->cqe > hr_dev->caps.max_cqes) {
284 ibdev_err(ibdev, "failed to check CQ count %u, max = %u.\n",
285 attr->cqe, hr_dev->caps.max_cqes);
286 return -EINVAL;
287 }
288
289 if (attr->comp_vector >= hr_dev->caps.num_comp_vectors) {
290 ibdev_err(ibdev, "failed to check CQ vector = %u, max = %d.\n",
291 attr->comp_vector, hr_dev->caps.num_comp_vectors);
292 return -EINVAL;
293 }
294
295 return 0;
296}
297
298static int get_cq_ucmd(struct hns_roce_cq *hr_cq, struct ib_udata *udata,
299 struct hns_roce_ib_create_cq *ucmd)
300{
301 struct ib_device *ibdev = hr_cq->ib_cq.device;
302 int ret;
303
304 ret = ib_copy_from_udata(ucmd, udata, min(udata->inlen, sizeof(*ucmd)));
305 if (ret) {
306 ibdev_err(ibdev, "failed to copy CQ udata, ret = %d.\n", ret);
307 return ret;
308 }
309
310 return 0;
311}
312
313static void set_cq_param(struct hns_roce_cq *hr_cq, u32 cq_entries, int vector,
314 struct hns_roce_ib_create_cq *ucmd)
315{
316 struct hns_roce_dev *hr_dev = to_hr_dev(hr_cq->ib_cq.device);
317
318 cq_entries = max(cq_entries, hr_dev->caps.min_cqes);
319 cq_entries = roundup_pow_of_two(cq_entries);
320 hr_cq->ib_cq.cqe = cq_entries - 1;
321 hr_cq->cq_depth = cq_entries;
322 hr_cq->vector = vector;
323
324 spin_lock_init(&hr_cq->lock);
325 INIT_LIST_HEAD(&hr_cq->sq_list);
326 INIT_LIST_HEAD(&hr_cq->rq_list);
327}
328
329static int set_cqe_size(struct hns_roce_cq *hr_cq, struct ib_udata *udata,
330 struct hns_roce_ib_create_cq *ucmd)
331{
332 struct hns_roce_dev *hr_dev = to_hr_dev(hr_cq->ib_cq.device);
333
334 if (!udata) {
335 hr_cq->cqe_size = hr_dev->caps.cqe_sz;
336 return 0;
337 }
338
339 if (udata->inlen >= offsetofend(typeof(*ucmd), cqe_size)) {
340 if (ucmd->cqe_size != HNS_ROCE_V2_CQE_SIZE &&
341 ucmd->cqe_size != HNS_ROCE_V3_CQE_SIZE) {
342 ibdev_err(&hr_dev->ib_dev,
343 "invalid cqe size %u.\n", ucmd->cqe_size);
344 return -EINVAL;
345 }
346
347 hr_cq->cqe_size = ucmd->cqe_size;
348 } else {
349 hr_cq->cqe_size = HNS_ROCE_V2_CQE_SIZE;
350 }
351
352 return 0;
353}
354
355int hns_roce_create_cq(struct ib_cq *ib_cq, const struct ib_cq_init_attr *attr,
356 struct ib_udata *udata)
357{
358 struct hns_roce_dev *hr_dev = to_hr_dev(ib_cq->device);
359 struct hns_roce_ib_create_cq_resp resp = {};
360 struct hns_roce_cq *hr_cq = to_hr_cq(ib_cq);
361 struct ib_device *ibdev = &hr_dev->ib_dev;
362 struct hns_roce_ib_create_cq ucmd = {};
363 int ret;
364
365 if (attr->flags)
366 return -EOPNOTSUPP;
367
368 ret = verify_cq_create_attr(hr_dev, attr);
369 if (ret)
370 return ret;
371
372 if (udata) {
373 ret = get_cq_ucmd(hr_cq, udata, &ucmd);
374 if (ret)
375 return ret;
376 }
377
378 set_cq_param(hr_cq, attr->cqe, attr->comp_vector, &ucmd);
379
380 ret = set_cqe_size(hr_cq, udata, &ucmd);
381 if (ret)
382 return ret;
383
384 ret = alloc_cq_buf(hr_dev, hr_cq, udata, ucmd.buf_addr);
385 if (ret) {
386 ibdev_err(ibdev, "failed to alloc CQ buf, ret = %d.\n", ret);
387 return ret;
388 }
389
390 ret = alloc_cq_db(hr_dev, hr_cq, udata, ucmd.db_addr, &resp);
391 if (ret) {
392 ibdev_err(ibdev, "failed to alloc CQ db, ret = %d.\n", ret);
393 goto err_cq_buf;
394 }
395
396 ret = alloc_cqn(hr_dev, hr_cq);
397 if (ret) {
398 ibdev_err(ibdev, "failed to alloc CQN, ret = %d.\n", ret);
399 goto err_cq_db;
400 }
401
402 ret = alloc_cqc(hr_dev, hr_cq);
403 if (ret) {
404 ibdev_err(ibdev,
405 "failed to alloc CQ context, ret = %d.\n", ret);
406 goto err_cqn;
407 }
408
409
410
411
412
413
414
415 if (!udata && hr_cq->tptr_addr)
416 *hr_cq->tptr_addr = 0;
417
418 if (udata) {
419 resp.cqn = hr_cq->cqn;
420 ret = ib_copy_to_udata(udata, &resp,
421 min(udata->outlen, sizeof(resp)));
422 if (ret)
423 goto err_cqc;
424 }
425
426 return 0;
427
428err_cqc:
429 free_cqc(hr_dev, hr_cq);
430err_cqn:
431 free_cqn(hr_dev, hr_cq->cqn);
432err_cq_db:
433 free_cq_db(hr_dev, hr_cq, udata);
434err_cq_buf:
435 free_cq_buf(hr_dev, hr_cq);
436 return ret;
437}
438
439int hns_roce_destroy_cq(struct ib_cq *ib_cq, struct ib_udata *udata)
440{
441 struct hns_roce_dev *hr_dev = to_hr_dev(ib_cq->device);
442 struct hns_roce_cq *hr_cq = to_hr_cq(ib_cq);
443
444 if (hr_dev->hw->destroy_cq)
445 hr_dev->hw->destroy_cq(ib_cq, udata);
446
447 free_cqc(hr_dev, hr_cq);
448 free_cqn(hr_dev, hr_cq->cqn);
449 free_cq_db(hr_dev, hr_cq, udata);
450 free_cq_buf(hr_dev, hr_cq);
451
452 return 0;
453}
454
455void hns_roce_cq_completion(struct hns_roce_dev *hr_dev, u32 cqn)
456{
457 struct hns_roce_cq *hr_cq;
458 struct ib_cq *ibcq;
459
460 hr_cq = xa_load(&hr_dev->cq_table.array,
461 cqn & (hr_dev->caps.num_cqs - 1));
462 if (!hr_cq) {
463 dev_warn(hr_dev->dev, "Completion event for bogus CQ 0x%06x\n",
464 cqn);
465 return;
466 }
467
468 ++hr_cq->arm_sn;
469 ibcq = &hr_cq->ib_cq;
470 if (ibcq->comp_handler)
471 ibcq->comp_handler(ibcq, ibcq->cq_context);
472}
473
474void hns_roce_cq_event(struct hns_roce_dev *hr_dev, u32 cqn, int event_type)
475{
476 struct device *dev = hr_dev->dev;
477 struct hns_roce_cq *hr_cq;
478 struct ib_event event;
479 struct ib_cq *ibcq;
480
481 hr_cq = xa_load(&hr_dev->cq_table.array,
482 cqn & (hr_dev->caps.num_cqs - 1));
483 if (!hr_cq) {
484 dev_warn(dev, "Async event for bogus CQ 0x%06x\n", cqn);
485 return;
486 }
487
488 if (event_type != HNS_ROCE_EVENT_TYPE_CQ_ID_INVALID &&
489 event_type != HNS_ROCE_EVENT_TYPE_CQ_ACCESS_ERROR &&
490 event_type != HNS_ROCE_EVENT_TYPE_CQ_OVERFLOW) {
491 dev_err(dev, "Unexpected event type 0x%x on CQ 0x%06x\n",
492 event_type, cqn);
493 return;
494 }
495
496 refcount_inc(&hr_cq->refcount);
497
498 ibcq = &hr_cq->ib_cq;
499 if (ibcq->event_handler) {
500 event.device = ibcq->device;
501 event.element.cq = ibcq;
502 event.event = IB_EVENT_CQ_ERR;
503 ibcq->event_handler(&event, ibcq->cq_context);
504 }
505
506 if (refcount_dec_and_test(&hr_cq->refcount))
507 complete(&hr_cq->free);
508}
509
510void hns_roce_init_cq_table(struct hns_roce_dev *hr_dev)
511{
512 struct hns_roce_cq_table *cq_table = &hr_dev->cq_table;
513 unsigned int reserved_from_bot;
514 unsigned int i;
515
516 mutex_init(&cq_table->bank_mutex);
517 xa_init(&cq_table->array);
518
519 reserved_from_bot = hr_dev->caps.reserved_cqs;
520
521 for (i = 0; i < reserved_from_bot; i++) {
522 cq_table->bank[get_cq_bankid(i)].inuse++;
523 cq_table->bank[get_cq_bankid(i)].min++;
524 }
525
526 for (i = 0; i < HNS_ROCE_CQ_BANK_NUM; i++) {
527 ida_init(&cq_table->bank[i].ida);
528 cq_table->bank[i].max = hr_dev->caps.num_cqs /
529 HNS_ROCE_CQ_BANK_NUM - 1;
530 }
531}
532
533void hns_roce_cleanup_cq_table(struct hns_roce_dev *hr_dev)
534{
535 int i;
536
537 for (i = 0; i < HNS_ROCE_CQ_BANK_NUM; i++)
538 ida_destroy(&hr_dev->cq_table.bank[i].ida);
539}
540
