1 /* 2 * Copyright (c) 2016 Hisilicon Limited. 3 * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved. 4 * 5 * This software is available to you under a choice of one of two 6 * licenses. You may choose to be licensed under the terms of the GNU 7 * General Public License (GPL) Version 2, available from the file 8 * COPYING in the main directory of this source tree, or the 9 * OpenIB.org BSD license below: 10 * 11 * Redistribution and use in source and binary forms, with or 12 * without modification, are permitted provided that the following 13 * conditions are met: 14 * 15 * - Redistributions of source code must retain the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer. 18 * 19 * - Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials 22 * provided with the distribution. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31 * SOFTWARE. 32 */ 33 34 #include <linux/platform_device.h> 35 #include <linux/vmalloc.h> 36 #include <rdma/ib_umem.h> 37 #include "hns_roce_device.h" 38 #include "hns_roce_cmd.h" 39 #include "hns_roce_hem.h" 40 41 static u32 hw_index_to_key(unsigned long ind) 42 { 43 return (u32)(ind >> 24) | (ind << 8); 44 } 45 46 unsigned long key_to_hw_index(u32 key) 47 { 48 return (key << 24) | (key >> 8); 49 } 50 51 static int hns_roce_hw_create_mpt(struct hns_roce_dev *hr_dev, 52 struct hns_roce_cmd_mailbox *mailbox, 53 unsigned long mpt_index) 54 { 55 return hns_roce_cmd_mbox(hr_dev, mailbox->dma, 0, mpt_index, 0, 56 HNS_ROCE_CMD_CREATE_MPT, 57 HNS_ROCE_CMD_TIMEOUT_MSECS); 58 } 59 60 int hns_roce_hw_destroy_mpt(struct hns_roce_dev *hr_dev, 61 struct hns_roce_cmd_mailbox *mailbox, 62 unsigned long mpt_index) 63 { 64 return hns_roce_cmd_mbox(hr_dev, 0, mailbox ? mailbox->dma : 0, 65 mpt_index, !mailbox, HNS_ROCE_CMD_DESTROY_MPT, 66 HNS_ROCE_CMD_TIMEOUT_MSECS); 67 } 68 69 static int alloc_mr_key(struct hns_roce_dev *hr_dev, struct hns_roce_mr *mr, 70 u32 pd, u64 iova, u64 size, u32 access) 71 { 72 struct ib_device *ibdev = &hr_dev->ib_dev; 73 unsigned long obj = 0; 74 int err; 75 76 /* Allocate a key for mr from mr_table */ 77 err = hns_roce_bitmap_alloc(&hr_dev->mr_table.mtpt_bitmap, &obj); 78 if (err) { 79 ibdev_err(ibdev, 80 "failed to alloc bitmap for MR key, ret = %d.\n", 81 err); 82 return -ENOMEM; 83 } 84 85 mr->iova = iova; /* MR va starting addr */ 86 mr->size = size; /* MR addr range */ 87 mr->pd = pd; /* MR num */ 88 mr->access = access; /* MR access permit */ 89 mr->enabled = 0; /* MR active status */ 90 mr->key = hw_index_to_key(obj); /* MR key */ 91 92 err = hns_roce_table_get(hr_dev, &hr_dev->mr_table.mtpt_table, obj); 93 if (err) { 94 ibdev_err(ibdev, "failed to alloc mtpt, ret = %d.\n", err); 95 goto err_free_bitmap; 96 } 97 98 return 0; 99 err_free_bitmap: 100 hns_roce_bitmap_free(&hr_dev->mr_table.mtpt_bitmap, obj, BITMAP_NO_RR); 101 return err; 102 } 103 104 static void free_mr_key(struct hns_roce_dev *hr_dev, struct hns_roce_mr *mr) 105 { 106 unsigned long obj = key_to_hw_index(mr->key); 107 108 hns_roce_table_put(hr_dev, &hr_dev->mr_table.mtpt_table, obj); 109 hns_roce_bitmap_free(&hr_dev->mr_table.mtpt_bitmap, obj, BITMAP_NO_RR); 110 } 111 112 static int alloc_mr_pbl(struct hns_roce_dev *hr_dev, struct hns_roce_mr *mr, 113 size_t length, struct ib_udata *udata, u64 start, 114 int access) 115 { 116 struct ib_device *ibdev = &hr_dev->ib_dev; 117 bool is_fast = mr->type == MR_TYPE_FRMR; 118 struct hns_roce_buf_attr buf_attr = {}; 119 int err; 120 121 mr->pbl_hop_num = is_fast ? 1 : hr_dev->caps.pbl_hop_num; 122 buf_attr.page_shift = is_fast ? PAGE_SHIFT : 123 hr_dev->caps.pbl_buf_pg_sz + PAGE_SHIFT; 124 buf_attr.region[0].size = length; 125 buf_attr.region[0].hopnum = mr->pbl_hop_num; 126 buf_attr.region_count = 1; 127 buf_attr.fixed_page = true; 128 buf_attr.user_access = access; 129 /* fast MR's buffer is alloced before mapping, not at creation */ 130 buf_attr.mtt_only = is_fast; 131 132 err = hns_roce_mtr_create(hr_dev, &mr->pbl_mtr, &buf_attr, 133 hr_dev->caps.pbl_ba_pg_sz + HNS_HW_PAGE_SHIFT, 134 udata, start); 135 if (err) 136 ibdev_err(ibdev, "failed to alloc pbl mtr, ret = %d.\n", err); 137 else 138 mr->npages = mr->pbl_mtr.hem_cfg.buf_pg_count; 139 140 return err; 141 } 142 143 static void free_mr_pbl(struct hns_roce_dev *hr_dev, struct hns_roce_mr *mr) 144 { 145 hns_roce_mtr_destroy(hr_dev, &mr->pbl_mtr); 146 } 147 148 static void hns_roce_mr_free(struct hns_roce_dev *hr_dev, 149 struct hns_roce_mr *mr) 150 { 151 struct ib_device *ibdev = &hr_dev->ib_dev; 152 int ret; 153 154 if (mr->enabled) { 155 ret = hns_roce_hw_destroy_mpt(hr_dev, NULL, 156 key_to_hw_index(mr->key) & 157 (hr_dev->caps.num_mtpts - 1)); 158 if (ret) 159 ibdev_warn(ibdev, "failed to destroy mpt, ret = %d.\n", 160 ret); 161 } 162 163 free_mr_pbl(hr_dev, mr); 164 free_mr_key(hr_dev, mr); 165 } 166 167 static int hns_roce_mr_enable(struct hns_roce_dev *hr_dev, 168 struct hns_roce_mr *mr) 169 { 170 int ret; 171 unsigned long mtpt_idx = key_to_hw_index(mr->key); 172 struct device *dev = hr_dev->dev; 173 struct hns_roce_cmd_mailbox *mailbox; 174 175 /* Allocate mailbox memory */ 176 mailbox = hns_roce_alloc_cmd_mailbox(hr_dev); 177 if (IS_ERR(mailbox)) { 178 ret = PTR_ERR(mailbox); 179 return ret; 180 } 181 182 if (mr->type != MR_TYPE_FRMR) 183 ret = hr_dev->hw->write_mtpt(hr_dev, mailbox->buf, mr, 184 mtpt_idx); 185 else 186 ret = hr_dev->hw->frmr_write_mtpt(hr_dev, mailbox->buf, mr); 187 if (ret) { 188 dev_err(dev, "Write mtpt fail!\n"); 189 goto err_page; 190 } 191 192 ret = hns_roce_hw_create_mpt(hr_dev, mailbox, 193 mtpt_idx & (hr_dev->caps.num_mtpts - 1)); 194 if (ret) { 195 dev_err(dev, "CREATE_MPT failed (%d)\n", ret); 196 goto err_page; 197 } 198 199 mr->enabled = 1; 200 hns_roce_free_cmd_mailbox(hr_dev, mailbox); 201 202 return 0; 203 204 err_page: 205 hns_roce_free_cmd_mailbox(hr_dev, mailbox); 206 207 return ret; 208 } 209 210 int hns_roce_init_mr_table(struct hns_roce_dev *hr_dev) 211 { 212 struct hns_roce_mr_table *mr_table = &hr_dev->mr_table; 213 int ret; 214 215 ret = hns_roce_bitmap_init(&mr_table->mtpt_bitmap, 216 hr_dev->caps.num_mtpts, 217 hr_dev->caps.num_mtpts - 1, 218 hr_dev->caps.reserved_mrws, 0); 219 return ret; 220 } 221 222 void hns_roce_cleanup_mr_table(struct hns_roce_dev *hr_dev) 223 { 224 struct hns_roce_mr_table *mr_table = &hr_dev->mr_table; 225 226 hns_roce_bitmap_cleanup(&mr_table->mtpt_bitmap); 227 } 228 229 struct ib_mr *hns_roce_get_dma_mr(struct ib_pd *pd, int acc) 230 { 231 struct hns_roce_dev *hr_dev = to_hr_dev(pd->device); 232 struct hns_roce_mr *mr; 233 int ret; 234 235 mr = kzalloc(sizeof(*mr), GFP_KERNEL); 236 if (mr == NULL) 237 return ERR_PTR(-ENOMEM); 238 239 mr->type = MR_TYPE_DMA; 240 241 /* Allocate memory region key */ 242 hns_roce_hem_list_init(&mr->pbl_mtr.hem_list); 243 ret = alloc_mr_key(hr_dev, mr, to_hr_pd(pd)->pdn, 0, 0, acc); 244 if (ret) 245 goto err_free; 246 247 ret = hns_roce_mr_enable(to_hr_dev(pd->device), mr); 248 if (ret) 249 goto err_mr; 250 251 mr->ibmr.rkey = mr->ibmr.lkey = mr->key; 252 253 return &mr->ibmr; 254 err_mr: 255 free_mr_key(hr_dev, mr); 256 257 err_free: 258 kfree(mr); 259 return ERR_PTR(ret); 260 } 261 262 struct ib_mr *hns_roce_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, 263 u64 virt_addr, int access_flags, 264 struct ib_udata *udata) 265 { 266 struct hns_roce_dev *hr_dev = to_hr_dev(pd->device); 267 struct hns_roce_mr *mr; 268 int ret; 269 270 mr = kzalloc(sizeof(*mr), GFP_KERNEL); 271 if (!mr) 272 return ERR_PTR(-ENOMEM); 273 274 mr->type = MR_TYPE_MR; 275 ret = alloc_mr_key(hr_dev, mr, to_hr_pd(pd)->pdn, virt_addr, length, 276 access_flags); 277 if (ret) 278 goto err_alloc_mr; 279 280 ret = alloc_mr_pbl(hr_dev, mr, length, udata, start, access_flags); 281 if (ret) 282 goto err_alloc_key; 283 284 ret = hns_roce_mr_enable(hr_dev, mr); 285 if (ret) 286 goto err_alloc_pbl; 287 288 mr->ibmr.rkey = mr->ibmr.lkey = mr->key; 289 mr->ibmr.length = length; 290 291 return &mr->ibmr; 292 293 err_alloc_pbl: 294 free_mr_pbl(hr_dev, mr); 295 err_alloc_key: 296 free_mr_key(hr_dev, mr); 297 err_alloc_mr: 298 kfree(mr); 299 return ERR_PTR(ret); 300 } 301 302 static int rereg_mr_trans(struct ib_mr *ibmr, int flags, 303 u64 start, u64 length, 304 u64 virt_addr, int mr_access_flags, 305 struct hns_roce_cmd_mailbox *mailbox, 306 u32 pdn, struct ib_udata *udata) 307 { 308 struct hns_roce_dev *hr_dev = to_hr_dev(ibmr->device); 309 struct ib_device *ibdev = &hr_dev->ib_dev; 310 struct hns_roce_mr *mr = to_hr_mr(ibmr); 311 int ret; 312 313 free_mr_pbl(hr_dev, mr); 314 ret = alloc_mr_pbl(hr_dev, mr, length, udata, start, mr_access_flags); 315 if (ret) { 316 ibdev_err(ibdev, "failed to create mr PBL, ret = %d.\n", ret); 317 return ret; 318 } 319 320 ret = hr_dev->hw->rereg_write_mtpt(hr_dev, mr, flags, pdn, 321 mr_access_flags, virt_addr, 322 length, mailbox->buf); 323 if (ret) { 324 ibdev_err(ibdev, "failed to write mtpt, ret = %d.\n", ret); 325 free_mr_pbl(hr_dev, mr); 326 } 327 328 return ret; 329 } 330 331 int hns_roce_rereg_user_mr(struct ib_mr *ibmr, int flags, u64 start, u64 length, 332 u64 virt_addr, int mr_access_flags, struct ib_pd *pd, 333 struct ib_udata *udata) 334 { 335 struct hns_roce_dev *hr_dev = to_hr_dev(ibmr->device); 336 struct ib_device *ib_dev = &hr_dev->ib_dev; 337 struct hns_roce_mr *mr = to_hr_mr(ibmr); 338 struct hns_roce_cmd_mailbox *mailbox; 339 unsigned long mtpt_idx; 340 u32 pdn = 0; 341 int ret; 342 343 if (!mr->enabled) 344 return -EINVAL; 345 346 mailbox = hns_roce_alloc_cmd_mailbox(hr_dev); 347 if (IS_ERR(mailbox)) 348 return PTR_ERR(mailbox); 349 350 mtpt_idx = key_to_hw_index(mr->key) & (hr_dev->caps.num_mtpts - 1); 351 ret = hns_roce_cmd_mbox(hr_dev, 0, mailbox->dma, mtpt_idx, 0, 352 HNS_ROCE_CMD_QUERY_MPT, 353 HNS_ROCE_CMD_TIMEOUT_MSECS); 354 if (ret) 355 goto free_cmd_mbox; 356 357 ret = hns_roce_hw_destroy_mpt(hr_dev, NULL, mtpt_idx); 358 if (ret) 359 ibdev_warn(ib_dev, "failed to destroy MPT, ret = %d.\n", ret); 360 361 mr->enabled = 0; 362 363 if (flags & IB_MR_REREG_PD) 364 pdn = to_hr_pd(pd)->pdn; 365 366 if (flags & IB_MR_REREG_TRANS) { 367 ret = rereg_mr_trans(ibmr, flags, 368 start, length, 369 virt_addr, mr_access_flags, 370 mailbox, pdn, udata); 371 if (ret) 372 goto free_cmd_mbox; 373 } else { 374 ret = hr_dev->hw->rereg_write_mtpt(hr_dev, mr, flags, pdn, 375 mr_access_flags, virt_addr, 376 length, mailbox->buf); 377 if (ret) 378 goto free_cmd_mbox; 379 } 380 381 ret = hns_roce_hw_create_mpt(hr_dev, mailbox, mtpt_idx); 382 if (ret) { 383 ibdev_err(ib_dev, "failed to create MPT, ret = %d.\n", ret); 384 goto free_cmd_mbox; 385 } 386 387 mr->enabled = 1; 388 if (flags & IB_MR_REREG_ACCESS) 389 mr->access = mr_access_flags; 390 391 hns_roce_free_cmd_mailbox(hr_dev, mailbox); 392 393 return 0; 394 395 free_cmd_mbox: 396 hns_roce_free_cmd_mailbox(hr_dev, mailbox); 397 398 return ret; 399 } 400 401 int hns_roce_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata) 402 { 403 struct hns_roce_dev *hr_dev = to_hr_dev(ibmr->device); 404 struct hns_roce_mr *mr = to_hr_mr(ibmr); 405 int ret = 0; 406 407 if (hr_dev->hw->dereg_mr) { 408 ret = hr_dev->hw->dereg_mr(hr_dev, mr, udata); 409 } else { 410 hns_roce_mr_free(hr_dev, mr); 411 kfree(mr); 412 } 413 414 return ret; 415 } 416 417 struct ib_mr *hns_roce_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type, 418 u32 max_num_sg) 419 { 420 struct hns_roce_dev *hr_dev = to_hr_dev(pd->device); 421 struct device *dev = hr_dev->dev; 422 struct hns_roce_mr *mr; 423 u64 length; 424 int ret; 425 426 if (mr_type != IB_MR_TYPE_MEM_REG) 427 return ERR_PTR(-EINVAL); 428 429 if (max_num_sg > HNS_ROCE_FRMR_MAX_PA) { 430 dev_err(dev, "max_num_sg larger than %d\n", 431 HNS_ROCE_FRMR_MAX_PA); 432 return ERR_PTR(-EINVAL); 433 } 434 435 mr = kzalloc(sizeof(*mr), GFP_KERNEL); 436 if (!mr) 437 return ERR_PTR(-ENOMEM); 438 439 mr->type = MR_TYPE_FRMR; 440 441 /* Allocate memory region key */ 442 length = max_num_sg * (1 << PAGE_SHIFT); 443 ret = alloc_mr_key(hr_dev, mr, to_hr_pd(pd)->pdn, 0, length, 0); 444 if (ret) 445 goto err_free; 446 447 ret = alloc_mr_pbl(hr_dev, mr, length, NULL, 0, 0); 448 if (ret) 449 goto err_key; 450 451 ret = hns_roce_mr_enable(hr_dev, mr); 452 if (ret) 453 goto err_pbl; 454 455 mr->ibmr.rkey = mr->ibmr.lkey = mr->key; 456 mr->ibmr.length = length; 457 458 return &mr->ibmr; 459 460 err_key: 461 free_mr_key(hr_dev, mr); 462 err_pbl: 463 free_mr_pbl(hr_dev, mr); 464 err_free: 465 kfree(mr); 466 return ERR_PTR(ret); 467 } 468 469 static int hns_roce_set_page(struct ib_mr *ibmr, u64 addr) 470 { 471 struct hns_roce_mr *mr = to_hr_mr(ibmr); 472 473 if (likely(mr->npages < mr->pbl_mtr.hem_cfg.buf_pg_count)) { 474 mr->page_list[mr->npages++] = addr; 475 return 0; 476 } 477 478 return -ENOBUFS; 479 } 480 481 int hns_roce_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents, 482 unsigned int *sg_offset) 483 { 484 struct hns_roce_dev *hr_dev = to_hr_dev(ibmr->device); 485 struct ib_device *ibdev = &hr_dev->ib_dev; 486 struct hns_roce_mr *mr = to_hr_mr(ibmr); 487 struct hns_roce_mtr *mtr = &mr->pbl_mtr; 488 int ret = 0; 489 490 mr->npages = 0; 491 mr->page_list = kvcalloc(mr->pbl_mtr.hem_cfg.buf_pg_count, 492 sizeof(dma_addr_t), GFP_KERNEL); 493 if (!mr->page_list) 494 return ret; 495 496 ret = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, hns_roce_set_page); 497 if (ret < 1) { 498 ibdev_err(ibdev, "failed to store sg pages %d %d, cnt = %d.\n", 499 mr->npages, mr->pbl_mtr.hem_cfg.buf_pg_count, ret); 500 goto err_page_list; 501 } 502 503 mtr->hem_cfg.region[0].offset = 0; 504 mtr->hem_cfg.region[0].count = mr->npages; 505 mtr->hem_cfg.region[0].hopnum = mr->pbl_hop_num; 506 mtr->hem_cfg.region_count = 1; 507 ret = hns_roce_mtr_map(hr_dev, mtr, mr->page_list, mr->npages); 508 if (ret) { 509 ibdev_err(ibdev, "failed to map sg mtr, ret = %d.\n", ret); 510 ret = 0; 511 } else { 512 mr->pbl_mtr.hem_cfg.buf_pg_shift = ilog2(ibmr->page_size); 513 ret = mr->npages; 514 } 515 516 err_page_list: 517 kvfree(mr->page_list); 518 mr->page_list = NULL; 519 520 return ret; 521 } 522 523 static void hns_roce_mw_free(struct hns_roce_dev *hr_dev, 524 struct hns_roce_mw *mw) 525 { 526 struct device *dev = hr_dev->dev; 527 int ret; 528 529 if (mw->enabled) { 530 ret = hns_roce_hw_destroy_mpt(hr_dev, NULL, 531 key_to_hw_index(mw->rkey) & 532 (hr_dev->caps.num_mtpts - 1)); 533 if (ret) 534 dev_warn(dev, "MW DESTROY_MPT failed (%d)\n", ret); 535 536 hns_roce_table_put(hr_dev, &hr_dev->mr_table.mtpt_table, 537 key_to_hw_index(mw->rkey)); 538 } 539 540 hns_roce_bitmap_free(&hr_dev->mr_table.mtpt_bitmap, 541 key_to_hw_index(mw->rkey), BITMAP_NO_RR); 542 } 543 544 static int hns_roce_mw_enable(struct hns_roce_dev *hr_dev, 545 struct hns_roce_mw *mw) 546 { 547 struct hns_roce_mr_table *mr_table = &hr_dev->mr_table; 548 struct hns_roce_cmd_mailbox *mailbox; 549 struct device *dev = hr_dev->dev; 550 unsigned long mtpt_idx = key_to_hw_index(mw->rkey); 551 int ret; 552 553 /* prepare HEM entry memory */ 554 ret = hns_roce_table_get(hr_dev, &mr_table->mtpt_table, mtpt_idx); 555 if (ret) 556 return ret; 557 558 mailbox = hns_roce_alloc_cmd_mailbox(hr_dev); 559 if (IS_ERR(mailbox)) { 560 ret = PTR_ERR(mailbox); 561 goto err_table; 562 } 563 564 ret = hr_dev->hw->mw_write_mtpt(mailbox->buf, mw); 565 if (ret) { 566 dev_err(dev, "MW write mtpt fail!\n"); 567 goto err_page; 568 } 569 570 ret = hns_roce_hw_create_mpt(hr_dev, mailbox, 571 mtpt_idx & (hr_dev->caps.num_mtpts - 1)); 572 if (ret) { 573 dev_err(dev, "MW CREATE_MPT failed (%d)\n", ret); 574 goto err_page; 575 } 576 577 mw->enabled = 1; 578 579 hns_roce_free_cmd_mailbox(hr_dev, mailbox); 580 581 return 0; 582 583 err_page: 584 hns_roce_free_cmd_mailbox(hr_dev, mailbox); 585 586 err_table: 587 hns_roce_table_put(hr_dev, &mr_table->mtpt_table, mtpt_idx); 588 589 return ret; 590 } 591 592 struct ib_mw *hns_roce_alloc_mw(struct ib_pd *ib_pd, enum ib_mw_type type, 593 struct ib_udata *udata) 594 { 595 struct hns_roce_dev *hr_dev = to_hr_dev(ib_pd->device); 596 struct hns_roce_mw *mw; 597 unsigned long index = 0; 598 int ret; 599 600 mw = kmalloc(sizeof(*mw), GFP_KERNEL); 601 if (!mw) 602 return ERR_PTR(-ENOMEM); 603 604 /* Allocate a key for mw from bitmap */ 605 ret = hns_roce_bitmap_alloc(&hr_dev->mr_table.mtpt_bitmap, &index); 606 if (ret) 607 goto err_bitmap; 608 609 mw->rkey = hw_index_to_key(index); 610 611 mw->ibmw.rkey = mw->rkey; 612 mw->ibmw.type = type; 613 mw->pdn = to_hr_pd(ib_pd)->pdn; 614 mw->pbl_hop_num = hr_dev->caps.pbl_hop_num; 615 mw->pbl_ba_pg_sz = hr_dev->caps.pbl_ba_pg_sz; 616 mw->pbl_buf_pg_sz = hr_dev->caps.pbl_buf_pg_sz; 617 618 ret = hns_roce_mw_enable(hr_dev, mw); 619 if (ret) 620 goto err_mw; 621 622 return &mw->ibmw; 623 624 err_mw: 625 hns_roce_mw_free(hr_dev, mw); 626 627 err_bitmap: 628 kfree(mw); 629 630 return ERR_PTR(ret); 631 } 632 633 int hns_roce_dealloc_mw(struct ib_mw *ibmw) 634 { 635 struct hns_roce_dev *hr_dev = to_hr_dev(ibmw->device); 636 struct hns_roce_mw *mw = to_hr_mw(ibmw); 637 638 hns_roce_mw_free(hr_dev, mw); 639 kfree(mw); 640 641 return 0; 642 } 643 644 static int mtr_map_region(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr, 645 dma_addr_t *pages, struct hns_roce_buf_region *region) 646 { 647 __le64 *mtts; 648 int offset; 649 int count; 650 int npage; 651 u64 addr; 652 int end; 653 int i; 654 655 /* if hopnum is 0, buffer cannot store BAs, so skip write mtt */ 656 if (!region->hopnum) 657 return 0; 658 659 offset = region->offset; 660 end = offset + region->count; 661 npage = 0; 662 while (offset < end) { 663 mtts = hns_roce_hem_list_find_mtt(hr_dev, &mtr->hem_list, 664 offset, &count, NULL); 665 if (!mtts) 666 return -ENOBUFS; 667 668 for (i = 0; i < count; i++) { 669 if (hr_dev->hw_rev == HNS_ROCE_HW_VER1) 670 addr = to_hr_hw_page_addr(pages[npage]); 671 else 672 addr = pages[npage]; 673 674 mtts[i] = cpu_to_le64(addr); 675 npage++; 676 } 677 offset += count; 678 } 679 680 return 0; 681 } 682 683 static inline bool mtr_has_mtt(struct hns_roce_buf_attr *attr) 684 { 685 int i; 686 687 for (i = 0; i < attr->region_count; i++) 688 if (attr->region[i].hopnum != HNS_ROCE_HOP_NUM_0 && 689 attr->region[i].hopnum > 0) 690 return true; 691 692 /* because the mtr only one root base address, when hopnum is 0 means 693 * root base address equals the first buffer address, thus all alloced 694 * memory must in a continuous space accessed by direct mode. 695 */ 696 return false; 697 } 698 699 static inline size_t mtr_bufs_size(struct hns_roce_buf_attr *attr) 700 { 701 size_t size = 0; 702 int i; 703 704 for (i = 0; i < attr->region_count; i++) 705 size += attr->region[i].size; 706 707 return size; 708 } 709 710 static inline int mtr_umem_page_count(struct ib_umem *umem, 711 unsigned int page_shift) 712 { 713 int count = ib_umem_page_count(umem); 714 715 if (page_shift >= PAGE_SHIFT) 716 count >>= page_shift - PAGE_SHIFT; 717 else 718 count <<= PAGE_SHIFT - page_shift; 719 720 return count; 721 } 722 723 static inline size_t mtr_kmem_direct_size(bool is_direct, size_t alloc_size, 724 unsigned int page_shift) 725 { 726 if (is_direct) 727 return ALIGN(alloc_size, 1 << page_shift); 728 else 729 return HNS_HW_DIRECT_PAGE_COUNT << page_shift; 730 } 731 732 /* 733 * check the given pages in continuous address space 734 * Returns 0 on success, or the error page num. 735 */ 736 static inline int mtr_check_direct_pages(dma_addr_t *pages, int page_count, 737 unsigned int page_shift) 738 { 739 size_t page_size = 1 << page_shift; 740 int i; 741 742 for (i = 1; i < page_count; i++) 743 if (pages[i] - pages[i - 1] != page_size) 744 return i; 745 746 return 0; 747 } 748 749 static void mtr_free_bufs(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr) 750 { 751 /* release user buffers */ 752 if (mtr->umem) { 753 ib_umem_release(mtr->umem); 754 mtr->umem = NULL; 755 } 756 757 /* release kernel buffers */ 758 if (mtr->kmem) { 759 hns_roce_buf_free(hr_dev, mtr->kmem); 760 kfree(mtr->kmem); 761 mtr->kmem = NULL; 762 } 763 } 764 765 static int mtr_alloc_bufs(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr, 766 struct hns_roce_buf_attr *buf_attr, bool is_direct, 767 struct ib_udata *udata, unsigned long user_addr) 768 { 769 struct ib_device *ibdev = &hr_dev->ib_dev; 770 unsigned int max_pg_shift = buf_attr->page_shift; 771 unsigned int best_pg_shift = 0; 772 int all_pg_count = 0; 773 size_t direct_size; 774 size_t total_size; 775 unsigned long tmp; 776 int ret = 0; 777 778 total_size = mtr_bufs_size(buf_attr); 779 if (total_size < 1) { 780 ibdev_err(ibdev, "Failed to check mtr size\n"); 781 return -EINVAL; 782 } 783 784 if (udata) { 785 mtr->kmem = NULL; 786 mtr->umem = ib_umem_get(ibdev, user_addr, total_size, 787 buf_attr->user_access); 788 if (IS_ERR_OR_NULL(mtr->umem)) { 789 ibdev_err(ibdev, "Failed to get umem, ret %ld\n", 790 PTR_ERR(mtr->umem)); 791 return -ENOMEM; 792 } 793 if (buf_attr->fixed_page) { 794 best_pg_shift = max_pg_shift; 795 } else { 796 tmp = GENMASK(max_pg_shift, 0); 797 ret = ib_umem_find_best_pgsz(mtr->umem, tmp, user_addr); 798 best_pg_shift = (ret <= PAGE_SIZE) ? 799 PAGE_SHIFT : ilog2(ret); 800 } 801 all_pg_count = mtr_umem_page_count(mtr->umem, best_pg_shift); 802 ret = 0; 803 } else { 804 mtr->umem = NULL; 805 mtr->kmem = kzalloc(sizeof(*mtr->kmem), GFP_KERNEL); 806 if (!mtr->kmem) { 807 ibdev_err(ibdev, "Failed to alloc kmem\n"); 808 return -ENOMEM; 809 } 810 direct_size = mtr_kmem_direct_size(is_direct, total_size, 811 max_pg_shift); 812 ret = hns_roce_buf_alloc(hr_dev, total_size, direct_size, 813 mtr->kmem, max_pg_shift); 814 if (ret) { 815 ibdev_err(ibdev, "Failed to alloc kmem, ret %d\n", ret); 816 goto err_alloc_mem; 817 } else { 818 best_pg_shift = max_pg_shift; 819 all_pg_count = mtr->kmem->npages; 820 } 821 } 822 823 /* must bigger than minimum hardware page shift */ 824 if (best_pg_shift < HNS_HW_PAGE_SHIFT || all_pg_count < 1) { 825 ret = -EINVAL; 826 ibdev_err(ibdev, "Failed to check mtr page shift %d count %d\n", 827 best_pg_shift, all_pg_count); 828 goto err_alloc_mem; 829 } 830 831 mtr->hem_cfg.buf_pg_shift = best_pg_shift; 832 mtr->hem_cfg.buf_pg_count = all_pg_count; 833 834 return 0; 835 err_alloc_mem: 836 mtr_free_bufs(hr_dev, mtr); 837 return ret; 838 } 839 840 static int mtr_get_pages(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr, 841 dma_addr_t *pages, int count, unsigned int page_shift) 842 { 843 struct ib_device *ibdev = &hr_dev->ib_dev; 844 int npage; 845 int err; 846 847 if (mtr->umem) 848 npage = hns_roce_get_umem_bufs(hr_dev, pages, count, 0, 849 mtr->umem, page_shift); 850 else 851 npage = hns_roce_get_kmem_bufs(hr_dev, pages, count, 0, 852 mtr->kmem); 853 854 if (mtr->hem_cfg.is_direct && npage > 1) { 855 err = mtr_check_direct_pages(pages, npage, page_shift); 856 if (err) { 857 ibdev_err(ibdev, "Failed to check %s direct page-%d\n", 858 mtr->umem ? "user" : "kernel", err); 859 npage = err; 860 } 861 } 862 863 return npage; 864 } 865 866 int hns_roce_mtr_map(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr, 867 dma_addr_t *pages, int page_cnt) 868 { 869 struct ib_device *ibdev = &hr_dev->ib_dev; 870 struct hns_roce_buf_region *r; 871 int err; 872 int i; 873 874 /* 875 * Only use the first page address as root ba when hopnum is 0, this 876 * is because the addresses of all pages are consecutive in this case. 877 */ 878 if (mtr->hem_cfg.is_direct) { 879 mtr->hem_cfg.root_ba = pages[0]; 880 return 0; 881 } 882 883 for (i = 0; i < mtr->hem_cfg.region_count; i++) { 884 r = &mtr->hem_cfg.region[i]; 885 if (r->offset + r->count > page_cnt) { 886 err = -EINVAL; 887 ibdev_err(ibdev, 888 "Failed to check mtr%d end %d + %d, max %d\n", 889 i, r->offset, r->count, page_cnt); 890 return err; 891 } 892 893 err = mtr_map_region(hr_dev, mtr, &pages[r->offset], r); 894 if (err) { 895 ibdev_err(ibdev, 896 "Failed to map mtr%d offset %d, err %d\n", 897 i, r->offset, err); 898 return err; 899 } 900 } 901 902 return 0; 903 } 904 905 int hns_roce_mtr_find(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr, 906 int offset, u64 *mtt_buf, int mtt_max, u64 *base_addr) 907 { 908 struct hns_roce_hem_cfg *cfg = &mtr->hem_cfg; 909 int start_index; 910 int mtt_count; 911 int total = 0; 912 __le64 *mtts; 913 int npage; 914 u64 addr; 915 int left; 916 917 if (!mtt_buf || mtt_max < 1) 918 goto done; 919 920 /* no mtt memory in direct mode, so just return the buffer address */ 921 if (cfg->is_direct) { 922 start_index = offset >> HNS_HW_PAGE_SHIFT; 923 for (mtt_count = 0; mtt_count < cfg->region_count && 924 total < mtt_max; mtt_count++) { 925 npage = cfg->region[mtt_count].offset; 926 if (npage < start_index) 927 continue; 928 929 addr = cfg->root_ba + (npage << HNS_HW_PAGE_SHIFT); 930 if (hr_dev->hw_rev == HNS_ROCE_HW_VER1) 931 mtt_buf[total] = to_hr_hw_page_addr(addr); 932 else 933 mtt_buf[total] = addr; 934 935 total++; 936 } 937 938 goto done; 939 } 940 941 start_index = offset >> cfg->buf_pg_shift; 942 left = mtt_max; 943 while (left > 0) { 944 mtt_count = 0; 945 mtts = hns_roce_hem_list_find_mtt(hr_dev, &mtr->hem_list, 946 start_index + total, 947 &mtt_count, NULL); 948 if (!mtts || !mtt_count) 949 goto done; 950 951 npage = min(mtt_count, left); 952 left -= npage; 953 for (mtt_count = 0; mtt_count < npage; mtt_count++) 954 mtt_buf[total++] = le64_to_cpu(mtts[mtt_count]); 955 } 956 957 done: 958 if (base_addr) 959 *base_addr = cfg->root_ba; 960 961 return total; 962 } 963 964 static int mtr_init_buf_cfg(struct hns_roce_dev *hr_dev, 965 struct hns_roce_buf_attr *attr, 966 struct hns_roce_hem_cfg *cfg, 967 unsigned int *buf_page_shift) 968 { 969 struct hns_roce_buf_region *r; 970 unsigned int page_shift = 0; 971 int page_cnt = 0; 972 size_t buf_size; 973 int region_cnt; 974 975 if (cfg->is_direct) { 976 buf_size = cfg->buf_pg_count << cfg->buf_pg_shift; 977 page_cnt = DIV_ROUND_UP(buf_size, HNS_HW_PAGE_SIZE); 978 /* 979 * When HEM buffer use level-0 addressing, the page size equals 980 * the buffer size, and the the page size = 4K * 2^N. 981 */ 982 cfg->buf_pg_shift = HNS_HW_PAGE_SHIFT + order_base_2(page_cnt); 983 if (attr->region_count > 1) { 984 cfg->buf_pg_count = page_cnt; 985 page_shift = HNS_HW_PAGE_SHIFT; 986 } else { 987 cfg->buf_pg_count = 1; 988 page_shift = cfg->buf_pg_shift; 989 if (buf_size != 1 << page_shift) { 990 ibdev_err(&hr_dev->ib_dev, 991 "failed to check direct size %zu shift %d.\n", 992 buf_size, page_shift); 993 return -EINVAL; 994 } 995 } 996 } else { 997 page_shift = cfg->buf_pg_shift; 998 } 999 1000 /* convert buffer size to page index and page count */ 1001 for (page_cnt = 0, region_cnt = 0; page_cnt < cfg->buf_pg_count && 1002 region_cnt < attr->region_count && 1003 region_cnt < ARRAY_SIZE(cfg->region); region_cnt++) { 1004 r = &cfg->region[region_cnt]; 1005 r->offset = page_cnt; 1006 buf_size = hr_hw_page_align(attr->region[region_cnt].size); 1007 r->count = DIV_ROUND_UP(buf_size, 1 << page_shift); 1008 page_cnt += r->count; 1009 r->hopnum = to_hr_hem_hopnum(attr->region[region_cnt].hopnum, 1010 r->count); 1011 } 1012 1013 if (region_cnt < 1) { 1014 ibdev_err(&hr_dev->ib_dev, 1015 "failed to check mtr region count, pages = %d.\n", 1016 cfg->buf_pg_count); 1017 return -ENOBUFS; 1018 } 1019 1020 cfg->region_count = region_cnt; 1021 *buf_page_shift = page_shift; 1022 1023 return page_cnt; 1024 } 1025 1026 /** 1027 * hns_roce_mtr_create - Create hns memory translate region. 1028 * 1029 * @mtr: memory translate region 1030 * @buf_attr: buffer attribute for creating mtr 1031 * @ba_page_shift: page shift for multi-hop base address table 1032 * @udata: user space context, if it's NULL, means kernel space 1033 * @user_addr: userspace virtual address to start at 1034 */ 1035 int hns_roce_mtr_create(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr, 1036 struct hns_roce_buf_attr *buf_attr, 1037 unsigned int ba_page_shift, struct ib_udata *udata, 1038 unsigned long user_addr) 1039 { 1040 struct hns_roce_hem_cfg *cfg = &mtr->hem_cfg; 1041 struct ib_device *ibdev = &hr_dev->ib_dev; 1042 unsigned int buf_page_shift = 0; 1043 dma_addr_t *pages = NULL; 1044 int all_pg_cnt; 1045 int get_pg_cnt; 1046 int ret = 0; 1047 1048 /* if disable mtt, all pages must in a continuous address range */ 1049 cfg->is_direct = !mtr_has_mtt(buf_attr); 1050 1051 /* if buffer only need mtt, just init the hem cfg */ 1052 if (buf_attr->mtt_only) { 1053 cfg->buf_pg_shift = buf_attr->page_shift; 1054 cfg->buf_pg_count = mtr_bufs_size(buf_attr) >> 1055 buf_attr->page_shift; 1056 mtr->umem = NULL; 1057 mtr->kmem = NULL; 1058 } else { 1059 ret = mtr_alloc_bufs(hr_dev, mtr, buf_attr, cfg->is_direct, 1060 udata, user_addr); 1061 if (ret) { 1062 ibdev_err(ibdev, 1063 "failed to alloc mtr bufs, ret = %d.\n", ret); 1064 return ret; 1065 } 1066 } 1067 1068 all_pg_cnt = mtr_init_buf_cfg(hr_dev, buf_attr, cfg, &buf_page_shift); 1069 if (all_pg_cnt < 1) { 1070 ret = -ENOBUFS; 1071 ibdev_err(ibdev, "failed to init mtr buf cfg.\n"); 1072 goto err_alloc_bufs; 1073 } 1074 1075 hns_roce_hem_list_init(&mtr->hem_list); 1076 if (!cfg->is_direct) { 1077 ret = hns_roce_hem_list_request(hr_dev, &mtr->hem_list, 1078 cfg->region, cfg->region_count, 1079 ba_page_shift); 1080 if (ret) { 1081 ibdev_err(ibdev, "failed to request mtr hem, ret = %d.\n", 1082 ret); 1083 goto err_alloc_bufs; 1084 } 1085 cfg->root_ba = mtr->hem_list.root_ba; 1086 cfg->ba_pg_shift = ba_page_shift; 1087 } else { 1088 cfg->ba_pg_shift = cfg->buf_pg_shift; 1089 } 1090 1091 /* no buffer to map */ 1092 if (buf_attr->mtt_only) 1093 return 0; 1094 1095 /* alloc a tmp array to store buffer's dma address */ 1096 pages = kvcalloc(all_pg_cnt, sizeof(dma_addr_t), GFP_KERNEL); 1097 if (!pages) { 1098 ret = -ENOMEM; 1099 ibdev_err(ibdev, "failed to alloc mtr page list %d.\n", 1100 all_pg_cnt); 1101 goto err_alloc_hem_list; 1102 } 1103 1104 get_pg_cnt = mtr_get_pages(hr_dev, mtr, pages, all_pg_cnt, 1105 buf_page_shift); 1106 if (get_pg_cnt != all_pg_cnt) { 1107 ibdev_err(ibdev, "failed to get mtr page %d != %d.\n", 1108 get_pg_cnt, all_pg_cnt); 1109 ret = -ENOBUFS; 1110 goto err_alloc_page_list; 1111 } 1112 1113 /* write buffer's dma address to BA table */ 1114 ret = hns_roce_mtr_map(hr_dev, mtr, pages, all_pg_cnt); 1115 if (ret) { 1116 ibdev_err(ibdev, "failed to map mtr pages, ret = %d.\n", ret); 1117 goto err_alloc_page_list; 1118 } 1119 1120 /* drop tmp array */ 1121 kvfree(pages); 1122 return 0; 1123 err_alloc_page_list: 1124 kvfree(pages); 1125 err_alloc_hem_list: 1126 hns_roce_hem_list_release(hr_dev, &mtr->hem_list); 1127 err_alloc_bufs: 1128 mtr_free_bufs(hr_dev, mtr); 1129 return ret; 1130 } 1131 1132 void hns_roce_mtr_destroy(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr) 1133 { 1134 /* release multi-hop addressing resource */ 1135 hns_roce_hem_list_release(hr_dev, &mtr->hem_list); 1136 1137 /* free buffers */ 1138 mtr_free_bufs(hr_dev, mtr); 1139 } 1140