2 * Copyright (c) 2016 Hisilicon Limited.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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"
41 static u8 get_least_load_bankid_for_cq(struct hns_roce_bank *bank)
43 u32 least_load = bank[0].inuse;
48 for (i = 1; i < HNS_ROCE_CQ_BANK_NUM; i++) {
49 bankcnt = bank[i].inuse;
50 if (bankcnt < least_load) {
59 static int alloc_cqn(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq)
61 struct hns_roce_cq_table *cq_table = &hr_dev->cq_table;
62 struct hns_roce_bank *bank;
66 mutex_lock(&cq_table->bank_mutex);
67 bankid = get_least_load_bankid_for_cq(cq_table->bank);
68 bank = &cq_table->bank[bankid];
70 id = ida_alloc_range(&bank->ida, bank->min, bank->max, GFP_KERNEL);
72 mutex_unlock(&cq_table->bank_mutex);
76 /* the lower 2 bits is bankid */
77 hr_cq->cqn = (id << CQ_BANKID_SHIFT) | bankid;
79 mutex_unlock(&cq_table->bank_mutex);
84 static inline u8 get_cq_bankid(unsigned long cqn)
86 /* The lower 2 bits of CQN are used to hash to different banks */
87 return (u8)(cqn & GENMASK(1, 0));
90 static void free_cqn(struct hns_roce_dev *hr_dev, unsigned long cqn)
92 struct hns_roce_cq_table *cq_table = &hr_dev->cq_table;
93 struct hns_roce_bank *bank;
95 bank = &cq_table->bank[get_cq_bankid(cqn)];
97 ida_free(&bank->ida, cqn >> CQ_BANKID_SHIFT);
99 mutex_lock(&cq_table->bank_mutex);
101 mutex_unlock(&cq_table->bank_mutex);
104 static int alloc_cqc(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq)
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;
113 ret = hns_roce_mtr_find(hr_dev, &hr_cq->mtr, 0, mtts, ARRAY_SIZE(mtts),
116 ibdev_err(ibdev, "failed to find CQ mtr, ret = %d.\n", ret);
120 /* Get CQC memory HEM(Hardware Entry Memory) table */
121 ret = hns_roce_table_get(hr_dev, &cq_table->table, hr_cq->cqn);
123 ibdev_err(ibdev, "failed to get CQ(0x%lx) context, ret = %d.\n",
128 ret = xa_err(xa_store(&cq_table->array, hr_cq->cqn, hr_cq, GFP_KERNEL));
130 ibdev_err(ibdev, "failed to xa_store CQ, ret = %d.\n", ret);
134 /* Allocate mailbox memory */
135 mailbox = hns_roce_alloc_cmd_mailbox(hr_dev);
136 if (IS_ERR(mailbox)) {
137 ret = PTR_ERR(mailbox);
141 hr_dev->hw->write_cqc(hr_dev, hr_cq, mailbox->buf, mtts, dma_handle);
143 /* Send mailbox to hw */
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);
149 "failed to send create cmd for CQ(0x%lx), ret = %d.\n",
154 hr_cq->cons_index = 0;
157 refcount_set(&hr_cq->refcount, 1);
158 init_completion(&hr_cq->free);
163 xa_erase(&cq_table->array, hr_cq->cqn);
166 hns_roce_table_put(hr_dev, &cq_table->table, hr_cq->cqn);
172 static void free_cqc(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq)
174 struct hns_roce_cq_table *cq_table = &hr_dev->cq_table;
175 struct device *dev = hr_dev->dev;
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);
182 dev_err(dev, "DESTROY_CQ failed (%d) for CQN %06lx\n", ret,
185 xa_erase(&cq_table->array, hr_cq->cqn);
187 /* Waiting interrupt process procedure carried out */
188 synchronize_irq(hr_dev->eq_table.eq[hr_cq->vector].irq);
190 /* wait for all interrupt processed */
191 if (refcount_dec_and_test(&hr_cq->refcount))
192 complete(&hr_cq->free);
193 wait_for_completion(&hr_cq->free);
195 hns_roce_table_put(hr_dev, &cq_table->table, hr_cq->cqn);
198 static int alloc_cq_buf(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq,
199 struct ib_udata *udata, unsigned long addr)
201 struct ib_device *ibdev = &hr_dev->ib_dev;
202 struct hns_roce_buf_attr buf_attr = {};
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;
210 ret = hns_roce_mtr_create(hr_dev, &hr_cq->mtr, &buf_attr,
211 hr_dev->caps.cqe_ba_pg_sz + PAGE_SHIFT,
214 ibdev_err(ibdev, "failed to alloc CQ mtr, ret = %d.\n", ret);
219 static void free_cq_buf(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq)
221 hns_roce_mtr_destroy(hr_dev, &hr_cq->mtr);
224 static 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)
228 bool has_db = hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_CQ_RECORD_DB;
229 struct hns_roce_ucontext *uctx;
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);
240 hr_cq->flags |= HNS_ROCE_CQ_FLAG_RECORD_DB;
241 resp->cap_flags |= HNS_ROCE_CQ_FLAG_RECORD_DB;
245 err = hns_roce_alloc_db(hr_dev, &hr_cq->db, 1);
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;
252 hr_cq->db_reg = hr_dev->reg_base + hr_dev->odb_offset +
253 DB_REG_OFFSET * hr_dev->priv_uar.index;
259 static void free_cq_db(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq,
260 struct ib_udata *udata)
262 struct hns_roce_ucontext *uctx;
264 if (!(hr_cq->flags & HNS_ROCE_CQ_FLAG_RECORD_DB))
267 hr_cq->flags &= ~HNS_ROCE_CQ_FLAG_RECORD_DB;
269 uctx = rdma_udata_to_drv_context(udata,
270 struct hns_roce_ucontext,
272 hns_roce_db_unmap_user(uctx, &hr_cq->db);
274 hns_roce_free_db(hr_dev, &hr_cq->db);
278 static int verify_cq_create_attr(struct hns_roce_dev *hr_dev,
279 const struct ib_cq_init_attr *attr)
281 struct ib_device *ibdev = &hr_dev->ib_dev;
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);
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);
298 static int get_cq_ucmd(struct hns_roce_cq *hr_cq, struct ib_udata *udata,
299 struct hns_roce_ib_create_cq *ucmd)
301 struct ib_device *ibdev = hr_cq->ib_cq.device;
304 ret = ib_copy_from_udata(ucmd, udata, min(udata->inlen, sizeof(*ucmd)));
306 ibdev_err(ibdev, "failed to copy CQ udata, ret = %d.\n", ret);
313 static void set_cq_param(struct hns_roce_cq *hr_cq, u32 cq_entries, int vector,
314 struct hns_roce_ib_create_cq *ucmd)
316 struct hns_roce_dev *hr_dev = to_hr_dev(hr_cq->ib_cq.device);
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; /* used as cqe index */
321 hr_cq->cq_depth = cq_entries;
322 hr_cq->vector = vector;
324 spin_lock_init(&hr_cq->lock);
325 INIT_LIST_HEAD(&hr_cq->sq_list);
326 INIT_LIST_HEAD(&hr_cq->rq_list);
329 static int set_cqe_size(struct hns_roce_cq *hr_cq, struct ib_udata *udata,
330 struct hns_roce_ib_create_cq *ucmd)
332 struct hns_roce_dev *hr_dev = to_hr_dev(hr_cq->ib_cq.device);
335 hr_cq->cqe_size = hr_dev->caps.cqe_sz;
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);
347 hr_cq->cqe_size = ucmd->cqe_size;
349 hr_cq->cqe_size = HNS_ROCE_V2_CQE_SIZE;
355 int hns_roce_create_cq(struct ib_cq *ib_cq, const struct ib_cq_init_attr *attr,
356 struct ib_udata *udata)
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 = {};
368 ret = verify_cq_create_attr(hr_dev, attr);
373 ret = get_cq_ucmd(hr_cq, udata, &ucmd);
378 set_cq_param(hr_cq, attr->cqe, attr->comp_vector, &ucmd);
380 ret = set_cqe_size(hr_cq, udata, &ucmd);
384 ret = alloc_cq_buf(hr_dev, hr_cq, udata, ucmd.buf_addr);
386 ibdev_err(ibdev, "failed to alloc CQ buf, ret = %d.\n", ret);
390 ret = alloc_cq_db(hr_dev, hr_cq, udata, ucmd.db_addr, &resp);
392 ibdev_err(ibdev, "failed to alloc CQ db, ret = %d.\n", ret);
396 ret = alloc_cqn(hr_dev, hr_cq);
398 ibdev_err(ibdev, "failed to alloc CQN, ret = %d.\n", ret);
402 ret = alloc_cqc(hr_dev, hr_cq);
405 "failed to alloc CQ context, ret = %d.\n", ret);
410 * For the QP created by kernel space, tptr value should be initialized
411 * to zero; For the QP created by user space, it will cause synchronous
412 * problems if tptr is set to zero here, so we initialize it in user
415 if (!udata && hr_cq->tptr_addr)
416 *hr_cq->tptr_addr = 0;
419 resp.cqn = hr_cq->cqn;
420 ret = ib_copy_to_udata(udata, &resp,
421 min(udata->outlen, sizeof(resp)));
429 free_cqc(hr_dev, hr_cq);
431 free_cqn(hr_dev, hr_cq->cqn);
433 free_cq_db(hr_dev, hr_cq, udata);
435 free_cq_buf(hr_dev, hr_cq);
439 int hns_roce_destroy_cq(struct ib_cq *ib_cq, struct ib_udata *udata)
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);
444 if (hr_dev->hw->destroy_cq)
445 hr_dev->hw->destroy_cq(ib_cq, udata);
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);
455 void hns_roce_cq_completion(struct hns_roce_dev *hr_dev, u32 cqn)
457 struct hns_roce_cq *hr_cq;
460 hr_cq = xa_load(&hr_dev->cq_table.array,
461 cqn & (hr_dev->caps.num_cqs - 1));
463 dev_warn(hr_dev->dev, "Completion event for bogus CQ 0x%06x\n",
469 ibcq = &hr_cq->ib_cq;
470 if (ibcq->comp_handler)
471 ibcq->comp_handler(ibcq, ibcq->cq_context);
474 void hns_roce_cq_event(struct hns_roce_dev *hr_dev, u32 cqn, int event_type)
476 struct device *dev = hr_dev->dev;
477 struct hns_roce_cq *hr_cq;
478 struct ib_event event;
481 hr_cq = xa_load(&hr_dev->cq_table.array,
482 cqn & (hr_dev->caps.num_cqs - 1));
484 dev_warn(dev, "Async event for bogus CQ 0x%06x\n", cqn);
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",
496 refcount_inc(&hr_cq->refcount);
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);
506 if (refcount_dec_and_test(&hr_cq->refcount))
507 complete(&hr_cq->free);
510 void hns_roce_init_cq_table(struct hns_roce_dev *hr_dev)
512 struct hns_roce_cq_table *cq_table = &hr_dev->cq_table;
513 unsigned int reserved_from_bot;
516 mutex_init(&cq_table->bank_mutex);
517 xa_init(&cq_table->array);
519 reserved_from_bot = hr_dev->caps.reserved_cqs;
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++;
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;
533 void hns_roce_cleanup_cq_table(struct hns_roce_dev *hr_dev)
537 for (i = 0; i < HNS_ROCE_CQ_BANK_NUM; i++)
538 ida_destroy(&hr_dev->cq_table.bank[i].ida);