1 /* 2 * Copyright (c) 2016 Hisilicon Limited. 3 * 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: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 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. 22 * 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 30 * SOFTWARE. 31 */ 32 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 41 static 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 59 static 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 /* the lower 2 bits is bankid */ 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 84 static inline u8 get_cq_bankid(unsigned long cqn) 85 { 86 /* The lower 2 bits of CQN are used to hash to different banks */ 87 return (u8)(cqn & GENMASK(1, 0)); 88 } 89 90 static 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 } 103 104 static 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 /* Get CQC memory HEM(Hardware Entry Memory) table */ 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 /* Allocate mailbox memory */ 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 /* 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); 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; 161 162 err_xa: 163 xa_erase(&cq_table->array, hr_cq->cqn); 164 165 err_put: 166 hns_roce_table_put(hr_dev, &cq_table->table, hr_cq->cqn); 167 168 err_out: 169 return ret; 170 } 171 172 static 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 /* 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 } 197 198 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) 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 } 218 219 static 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 } 223 224 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) 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 } 258 259 static 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 } 277 278 static 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 } 297 298 static 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 } 312 313 static void set_cq_param(struct hns_roce_cq *hr_cq, u32 cq_entries, int vector, 314 struct hns_roce_ib_create_cq *ucmd) 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 } 328 329 static void 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 if (udata->inlen >= offsetofend(typeof(*ucmd), cqe_size)) 336 hr_cq->cqe_size = ucmd->cqe_size; 337 else 338 hr_cq->cqe_size = HNS_ROCE_V2_CQE_SIZE; 339 } else { 340 hr_cq->cqe_size = hr_dev->caps.cqe_sz; 341 } 342 } 343 344 int hns_roce_create_cq(struct ib_cq *ib_cq, const struct ib_cq_init_attr *attr, 345 struct ib_udata *udata) 346 { 347 struct hns_roce_dev *hr_dev = to_hr_dev(ib_cq->device); 348 struct hns_roce_ib_create_cq_resp resp = {}; 349 struct hns_roce_cq *hr_cq = to_hr_cq(ib_cq); 350 struct ib_device *ibdev = &hr_dev->ib_dev; 351 struct hns_roce_ib_create_cq ucmd = {}; 352 int ret; 353 354 if (attr->flags) 355 return -EOPNOTSUPP; 356 357 ret = verify_cq_create_attr(hr_dev, attr); 358 if (ret) 359 return ret; 360 361 if (udata) { 362 ret = get_cq_ucmd(hr_cq, udata, &ucmd); 363 if (ret) 364 return ret; 365 } 366 367 set_cq_param(hr_cq, attr->cqe, attr->comp_vector, &ucmd); 368 369 set_cqe_size(hr_cq, udata, &ucmd); 370 371 ret = alloc_cq_buf(hr_dev, hr_cq, udata, ucmd.buf_addr); 372 if (ret) { 373 ibdev_err(ibdev, "failed to alloc CQ buf, ret = %d.\n", ret); 374 return ret; 375 } 376 377 ret = alloc_cq_db(hr_dev, hr_cq, udata, ucmd.db_addr, &resp); 378 if (ret) { 379 ibdev_err(ibdev, "failed to alloc CQ db, ret = %d.\n", ret); 380 goto err_cq_buf; 381 } 382 383 ret = alloc_cqn(hr_dev, hr_cq); 384 if (ret) { 385 ibdev_err(ibdev, "failed to alloc CQN, ret = %d.\n", ret); 386 goto err_cq_db; 387 } 388 389 ret = alloc_cqc(hr_dev, hr_cq); 390 if (ret) { 391 ibdev_err(ibdev, 392 "failed to alloc CQ context, ret = %d.\n", ret); 393 goto err_cqn; 394 } 395 396 /* 397 * For the QP created by kernel space, tptr value should be initialized 398 * to zero; For the QP created by user space, it will cause synchronous 399 * problems if tptr is set to zero here, so we initialize it in user 400 * space. 401 */ 402 if (!udata && hr_cq->tptr_addr) 403 *hr_cq->tptr_addr = 0; 404 405 if (udata) { 406 resp.cqn = hr_cq->cqn; 407 ret = ib_copy_to_udata(udata, &resp, 408 min(udata->outlen, sizeof(resp))); 409 if (ret) 410 goto err_cqc; 411 } 412 413 return 0; 414 415 err_cqc: 416 free_cqc(hr_dev, hr_cq); 417 err_cqn: 418 free_cqn(hr_dev, hr_cq->cqn); 419 err_cq_db: 420 free_cq_db(hr_dev, hr_cq, udata); 421 err_cq_buf: 422 free_cq_buf(hr_dev, hr_cq); 423 return ret; 424 } 425 426 int hns_roce_destroy_cq(struct ib_cq *ib_cq, struct ib_udata *udata) 427 { 428 struct hns_roce_dev *hr_dev = to_hr_dev(ib_cq->device); 429 struct hns_roce_cq *hr_cq = to_hr_cq(ib_cq); 430 431 if (hr_dev->hw->destroy_cq) 432 hr_dev->hw->destroy_cq(ib_cq, udata); 433 434 free_cqc(hr_dev, hr_cq); 435 free_cqn(hr_dev, hr_cq->cqn); 436 free_cq_db(hr_dev, hr_cq, udata); 437 free_cq_buf(hr_dev, hr_cq); 438 439 return 0; 440 } 441 442 void hns_roce_cq_completion(struct hns_roce_dev *hr_dev, u32 cqn) 443 { 444 struct hns_roce_cq *hr_cq; 445 struct ib_cq *ibcq; 446 447 hr_cq = xa_load(&hr_dev->cq_table.array, 448 cqn & (hr_dev->caps.num_cqs - 1)); 449 if (!hr_cq) { 450 dev_warn(hr_dev->dev, "Completion event for bogus CQ 0x%06x\n", 451 cqn); 452 return; 453 } 454 455 ++hr_cq->arm_sn; 456 ibcq = &hr_cq->ib_cq; 457 if (ibcq->comp_handler) 458 ibcq->comp_handler(ibcq, ibcq->cq_context); 459 } 460 461 void hns_roce_cq_event(struct hns_roce_dev *hr_dev, u32 cqn, int event_type) 462 { 463 struct device *dev = hr_dev->dev; 464 struct hns_roce_cq *hr_cq; 465 struct ib_event event; 466 struct ib_cq *ibcq; 467 468 hr_cq = xa_load(&hr_dev->cq_table.array, 469 cqn & (hr_dev->caps.num_cqs - 1)); 470 if (!hr_cq) { 471 dev_warn(dev, "Async event for bogus CQ 0x%06x\n", cqn); 472 return; 473 } 474 475 if (event_type != HNS_ROCE_EVENT_TYPE_CQ_ID_INVALID && 476 event_type != HNS_ROCE_EVENT_TYPE_CQ_ACCESS_ERROR && 477 event_type != HNS_ROCE_EVENT_TYPE_CQ_OVERFLOW) { 478 dev_err(dev, "Unexpected event type 0x%x on CQ 0x%06x\n", 479 event_type, cqn); 480 return; 481 } 482 483 refcount_inc(&hr_cq->refcount); 484 485 ibcq = &hr_cq->ib_cq; 486 if (ibcq->event_handler) { 487 event.device = ibcq->device; 488 event.element.cq = ibcq; 489 event.event = IB_EVENT_CQ_ERR; 490 ibcq->event_handler(&event, ibcq->cq_context); 491 } 492 493 if (refcount_dec_and_test(&hr_cq->refcount)) 494 complete(&hr_cq->free); 495 } 496 497 void hns_roce_init_cq_table(struct hns_roce_dev *hr_dev) 498 { 499 struct hns_roce_cq_table *cq_table = &hr_dev->cq_table; 500 unsigned int reserved_from_bot; 501 unsigned int i; 502 503 mutex_init(&cq_table->bank_mutex); 504 xa_init(&cq_table->array); 505 506 reserved_from_bot = hr_dev->caps.reserved_cqs; 507 508 for (i = 0; i < reserved_from_bot; i++) { 509 cq_table->bank[get_cq_bankid(i)].inuse++; 510 cq_table->bank[get_cq_bankid(i)].min++; 511 } 512 513 for (i = 0; i < HNS_ROCE_CQ_BANK_NUM; i++) { 514 ida_init(&cq_table->bank[i].ida); 515 cq_table->bank[i].max = hr_dev->caps.num_cqs / 516 HNS_ROCE_CQ_BANK_NUM - 1; 517 } 518 } 519 520 void hns_roce_cleanup_cq_table(struct hns_roce_dev *hr_dev) 521 { 522 int i; 523 524 for (i = 0; i < HNS_ROCE_CQ_BANK_NUM; i++) 525 ida_destroy(&hr_dev->cq_table.bank[i].ida); 526 } 527