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1/*2 * Copyright (c) 2016 Hisilicon Limited.3 *4 * This software is available to you under a choice of one of two5 * licenses. You may choose to be licensed under the terms of the GNU6 * General Public License (GPL) Version 2, available from the file7 * COPYING in the main directory of this source tree, or the8 * OpenIB.org BSD license below:9 *10 * Redistribution and use in source and binary forms, with or11 * without modification, are permitted provided that the following12 * conditions are met:13 *14 * - Redistributions of source code must retain the above15 * copyright notice, this list of conditions and the following16 * disclaimer.17 *18 * - Redistributions in binary form must reproduce the above19 * copyright notice, this list of conditions and the following20 * disclaimer in the documentation and/or other materials21 * provided with the distribution.22 *23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE30 * SOFTWARE.31 */32 33#include <rdma/ib_umem.h>34#include <rdma/uverbs_ioctl.h>35#include "hns_roce_device.h"36#include "hns_roce_cmd.h"37#include "hns_roce_hem.h"38#include "hns_roce_common.h"39 40static u8 get_least_load_bankid_for_cq(struct hns_roce_bank *bank)41{42 u32 least_load = bank[0].inuse;43 u8 bankid = 0;44 u32 bankcnt;45 u8 i;46 47 for (i = 1; i < HNS_ROCE_CQ_BANK_NUM; i++) {48 bankcnt = bank[i].inuse;49 if (bankcnt < least_load) {50 least_load = bankcnt;51 bankid = i;52 }53 }54 55 return bankid;56}57 58static int alloc_cqn(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq)59{60 struct hns_roce_cq_table *cq_table = &hr_dev->cq_table;61 struct hns_roce_bank *bank;62 u8 bankid;63 int id;64 65 mutex_lock(&cq_table->bank_mutex);66 bankid = get_least_load_bankid_for_cq(cq_table->bank);67 bank = &cq_table->bank[bankid];68 69 id = ida_alloc_range(&bank->ida, bank->min, bank->max, GFP_KERNEL);70 if (id < 0) {71 mutex_unlock(&cq_table->bank_mutex);72 return id;73 }74 75 /* the lower 2 bits is bankid */76 hr_cq->cqn = (id << CQ_BANKID_SHIFT) | bankid;77 bank->inuse++;78 mutex_unlock(&cq_table->bank_mutex);79 80 return 0;81}82 83static inline u8 get_cq_bankid(unsigned long cqn)84{85 /* The lower 2 bits of CQN are used to hash to different banks */86 return (u8)(cqn & GENMASK(1, 0));87}88 89static void free_cqn(struct hns_roce_dev *hr_dev, unsigned long cqn)90{91 struct hns_roce_cq_table *cq_table = &hr_dev->cq_table;92 struct hns_roce_bank *bank;93 94 bank = &cq_table->bank[get_cq_bankid(cqn)];95 96 ida_free(&bank->ida, cqn >> CQ_BANKID_SHIFT);97 98 mutex_lock(&cq_table->bank_mutex);99 bank->inuse--;100 mutex_unlock(&cq_table->bank_mutex);101}102 103static int hns_roce_create_cqc(struct hns_roce_dev *hr_dev,104 struct hns_roce_cq *hr_cq,105 u64 *mtts, dma_addr_t dma_handle)106{107 struct ib_device *ibdev = &hr_dev->ib_dev;108 struct hns_roce_cmd_mailbox *mailbox;109 int ret;110 111 mailbox = hns_roce_alloc_cmd_mailbox(hr_dev);112 if (IS_ERR(mailbox)) {113 ibdev_err(ibdev, "failed to alloc mailbox for CQC.\n");114 return PTR_ERR(mailbox);115 }116 117 hr_dev->hw->write_cqc(hr_dev, hr_cq, mailbox->buf, mtts, dma_handle);118 119 ret = hns_roce_create_hw_ctx(hr_dev, mailbox, HNS_ROCE_CMD_CREATE_CQC,120 hr_cq->cqn);121 if (ret)122 ibdev_err(ibdev,123 "failed to send create cmd for CQ(0x%lx), ret = %d.\n",124 hr_cq->cqn, ret);125 126 hns_roce_free_cmd_mailbox(hr_dev, mailbox);127 128 return ret;129}130 131static int alloc_cqc(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq)132{133 struct hns_roce_cq_table *cq_table = &hr_dev->cq_table;134 struct ib_device *ibdev = &hr_dev->ib_dev;135 u64 mtts[MTT_MIN_COUNT] = {};136 int ret;137 138 ret = hns_roce_mtr_find(hr_dev, &hr_cq->mtr, 0, mtts, ARRAY_SIZE(mtts));139 if (ret) {140 ibdev_err(ibdev, "failed to find CQ mtr, ret = %d.\n", ret);141 return ret;142 }143 144 /* Get CQC memory HEM(Hardware Entry Memory) table */145 ret = hns_roce_table_get(hr_dev, &cq_table->table, hr_cq->cqn);146 if (ret) {147 ibdev_err(ibdev, "failed to get CQ(0x%lx) context, ret = %d.\n",148 hr_cq->cqn, ret);149 return ret;150 }151 152 ret = xa_err(xa_store_irq(&cq_table->array, hr_cq->cqn, hr_cq, GFP_KERNEL));153 if (ret) {154 ibdev_err(ibdev, "failed to xa_store CQ, ret = %d.\n", ret);155 goto err_put;156 }157 158 ret = hns_roce_create_cqc(hr_dev, hr_cq, mtts,159 hns_roce_get_mtr_ba(&hr_cq->mtr));160 if (ret)161 goto err_xa;162 163 return 0;164 165err_xa:166 xa_erase_irq(&cq_table->array, hr_cq->cqn);167err_put:168 hns_roce_table_put(hr_dev, &cq_table->table, hr_cq->cqn);169 170 return ret;171}172 173static void free_cqc(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq)174{175 struct hns_roce_cq_table *cq_table = &hr_dev->cq_table;176 struct device *dev = hr_dev->dev;177 int ret;178 179 ret = hns_roce_destroy_hw_ctx(hr_dev, HNS_ROCE_CMD_DESTROY_CQC,180 hr_cq->cqn);181 if (ret)182 dev_err(dev, "DESTROY_CQ failed (%d) for CQN %06lx\n", ret,183 hr_cq->cqn);184 185 xa_erase_irq(&cq_table->array, hr_cq->cqn);186 187 /* Waiting interrupt process procedure carried out */188 synchronize_irq(hr_dev->eq_table.eq[hr_cq->vector].irq);189 190 /* 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);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; /* used as cqe index */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 uverbs_attr_bundle *attrs)357{358 struct hns_roce_dev *hr_dev = to_hr_dev(ib_cq->device);359 struct ib_udata *udata = &attrs->driver_udata;360 struct hns_roce_ib_create_cq_resp resp = {};361 struct hns_roce_cq *hr_cq = to_hr_cq(ib_cq);362 struct ib_device *ibdev = &hr_dev->ib_dev;363 struct hns_roce_ib_create_cq ucmd = {};364 int ret;365 366 if (attr->flags) {367 ret = -EOPNOTSUPP;368 goto err_out;369 }370 371 ret = verify_cq_create_attr(hr_dev, attr);372 if (ret)373 goto err_out;374 375 if (udata) {376 ret = get_cq_ucmd(hr_cq, udata, &ucmd);377 if (ret)378 goto err_out;379 }380 381 set_cq_param(hr_cq, attr->cqe, attr->comp_vector, &ucmd);382 383 ret = set_cqe_size(hr_cq, udata, &ucmd);384 if (ret)385 goto err_out;386 387 ret = alloc_cq_buf(hr_dev, hr_cq, udata, ucmd.buf_addr);388 if (ret) {389 ibdev_err(ibdev, "failed to alloc CQ buf, ret = %d.\n", ret);390 goto err_out;391 }392 393 ret = alloc_cq_db(hr_dev, hr_cq, udata, ucmd.db_addr, &resp);394 if (ret) {395 ibdev_err(ibdev, "failed to alloc CQ db, ret = %d.\n", ret);396 goto err_cq_buf;397 }398 399 ret = alloc_cqn(hr_dev, hr_cq);400 if (ret) {401 ibdev_err(ibdev, "failed to alloc CQN, ret = %d.\n", ret);402 goto err_cq_db;403 }404 405 ret = alloc_cqc(hr_dev, hr_cq);406 if (ret) {407 ibdev_err(ibdev,408 "failed to alloc CQ context, ret = %d.\n", ret);409 goto err_cqn;410 }411 412 if (udata) {413 resp.cqn = hr_cq->cqn;414 ret = ib_copy_to_udata(udata, &resp,415 min(udata->outlen, sizeof(resp)));416 if (ret)417 goto err_cqc;418 }419 420 hr_cq->cons_index = 0;421 hr_cq->arm_sn = 1;422 refcount_set(&hr_cq->refcount, 1);423 init_completion(&hr_cq->free);424 425 return 0;426 427err_cqc:428 free_cqc(hr_dev, hr_cq);429err_cqn:430 free_cqn(hr_dev, hr_cq->cqn);431err_cq_db:432 free_cq_db(hr_dev, hr_cq, udata);433err_cq_buf:434 free_cq_buf(hr_dev, hr_cq);435err_out:436 atomic64_inc(&hr_dev->dfx_cnt[HNS_ROCE_DFX_CQ_CREATE_ERR_CNT]);437 438 return ret;439}440 441int hns_roce_destroy_cq(struct ib_cq *ib_cq, struct ib_udata *udata)442{443 struct hns_roce_dev *hr_dev = to_hr_dev(ib_cq->device);444 struct hns_roce_cq *hr_cq = to_hr_cq(ib_cq);445 446 free_cqc(hr_dev, hr_cq);447 free_cqn(hr_dev, hr_cq->cqn);448 free_cq_db(hr_dev, hr_cq, udata);449 free_cq_buf(hr_dev, hr_cq);450 451 return 0;452}453 454void hns_roce_cq_completion(struct hns_roce_dev *hr_dev, u32 cqn)455{456 struct hns_roce_cq *hr_cq;457 struct ib_cq *ibcq;458 459 hr_cq = xa_load(&hr_dev->cq_table.array,460 cqn & (hr_dev->caps.num_cqs - 1));461 if (!hr_cq) {462 dev_warn(hr_dev->dev, "completion event for bogus CQ 0x%06x\n",463 cqn);464 return;465 }466 467 ++hr_cq->arm_sn;468 ibcq = &hr_cq->ib_cq;469 if (ibcq->comp_handler)470 ibcq->comp_handler(ibcq, ibcq->cq_context);471}472 473void hns_roce_cq_event(struct hns_roce_dev *hr_dev, u32 cqn, int event_type)474{475 struct device *dev = hr_dev->dev;476 struct hns_roce_cq *hr_cq;477 struct ib_event event;478 struct ib_cq *ibcq;479 480 if (event_type != HNS_ROCE_EVENT_TYPE_CQ_ID_INVALID &&481 event_type != HNS_ROCE_EVENT_TYPE_CQ_ACCESS_ERROR &&482 event_type != HNS_ROCE_EVENT_TYPE_CQ_OVERFLOW) {483 dev_err(dev, "unexpected event type 0x%x on CQ 0x%06x\n",484 event_type, cqn);485 return;486 }487 488 xa_lock(&hr_dev->cq_table.array);489 hr_cq = xa_load(&hr_dev->cq_table.array,490 cqn & (hr_dev->caps.num_cqs - 1));491 if (hr_cq)492 refcount_inc(&hr_cq->refcount);493 xa_unlock(&hr_dev->cq_table.array);494 if (!hr_cq) {495 dev_warn(dev, "async event for bogus CQ 0x%06x\n", cqn);496 return;497 }498 499 ibcq = &hr_cq->ib_cq;500 if (ibcq->event_handler) {501 event.device = ibcq->device;502 event.element.cq = ibcq;503 event.event = IB_EVENT_CQ_ERR;504 ibcq->event_handler(&event, ibcq->cq_context);505 }506 507 if (refcount_dec_and_test(&hr_cq->refcount))508 complete(&hr_cq->free);509}510 511void hns_roce_init_cq_table(struct hns_roce_dev *hr_dev)512{513 struct hns_roce_cq_table *cq_table = &hr_dev->cq_table;514 unsigned int reserved_from_bot;515 unsigned int i;516 517 mutex_init(&cq_table->bank_mutex);518 xa_init(&cq_table->array);519 520 reserved_from_bot = hr_dev->caps.reserved_cqs;521 522 for (i = 0; i < reserved_from_bot; i++) {523 cq_table->bank[get_cq_bankid(i)].inuse++;524 cq_table->bank[get_cq_bankid(i)].min++;525 }526 527 for (i = 0; i < HNS_ROCE_CQ_BANK_NUM; i++) {528 ida_init(&cq_table->bank[i].ida);529 cq_table->bank[i].max = hr_dev->caps.num_cqs /530 HNS_ROCE_CQ_BANK_NUM - 1;531 }532}533 534void hns_roce_cleanup_cq_table(struct hns_roce_dev *hr_dev)535{536 int i;537 538 for (i = 0; i < HNS_ROCE_CQ_BANK_NUM; i++)539 ida_destroy(&hr_dev->cq_table.bank[i].ida);540 mutex_destroy(&hr_dev->cq_table.bank_mutex);541}542