1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * linux/drivers/net/ethernet/ibm/ehea/ehea_qmr.c 4 * 5 * eHEA ethernet device driver for IBM eServer System p 6 * 7 * (C) Copyright IBM Corp. 2006 8 * 9 * Authors: 10 * Christoph Raisch <raisch@de.ibm.com> 11 * Jan-Bernd Themann <themann@de.ibm.com> 12 * Thomas Klein <tklein@de.ibm.com> 13 */ 14 15 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 16 17 #include <linux/mm.h> 18 #include <linux/slab.h> 19 #include "ehea.h" 20 #include "ehea_phyp.h" 21 #include "ehea_qmr.h" 22 23 static struct ehea_bmap *ehea_bmap; 24 25 static void *hw_qpageit_get_inc(struct hw_queue *queue) 26 { 27 void *retvalue = hw_qeit_get(queue); 28 29 queue->current_q_offset += queue->pagesize; 30 if (queue->current_q_offset > queue->queue_length) { 31 queue->current_q_offset -= queue->pagesize; 32 retvalue = NULL; 33 } else if (((u64) retvalue) & (EHEA_PAGESIZE-1)) { 34 pr_err("not on pageboundary\n"); 35 retvalue = NULL; 36 } 37 return retvalue; 38 } 39 40 static int hw_queue_ctor(struct hw_queue *queue, const u32 nr_of_pages, 41 const u32 pagesize, const u32 qe_size) 42 { 43 int pages_per_kpage = PAGE_SIZE / pagesize; 44 int i, k; 45 46 if ((pagesize > PAGE_SIZE) || (!pages_per_kpage)) { 47 pr_err("pagesize conflict! kernel pagesize=%d, ehea pagesize=%d\n", 48 (int)PAGE_SIZE, (int)pagesize); 49 return -EINVAL; 50 } 51 52 queue->queue_length = nr_of_pages * pagesize; 53 queue->queue_pages = kmalloc_array(nr_of_pages, sizeof(void *), 54 GFP_KERNEL); 55 if (!queue->queue_pages) 56 return -ENOMEM; 57 58 /* 59 * allocate pages for queue: 60 * outer loop allocates whole kernel pages (page aligned) and 61 * inner loop divides a kernel page into smaller hea queue pages 62 */ 63 i = 0; 64 while (i < nr_of_pages) { 65 u8 *kpage = (u8 *)get_zeroed_page(GFP_KERNEL); 66 if (!kpage) 67 goto out_nomem; 68 for (k = 0; k < pages_per_kpage && i < nr_of_pages; k++) { 69 (queue->queue_pages)[i] = (struct ehea_page *)kpage; 70 kpage += pagesize; 71 i++; 72 } 73 } 74 75 queue->current_q_offset = 0; 76 queue->qe_size = qe_size; 77 queue->pagesize = pagesize; 78 queue->toggle_state = 1; 79 80 return 0; 81 out_nomem: 82 for (i = 0; i < nr_of_pages; i += pages_per_kpage) { 83 if (!(queue->queue_pages)[i]) 84 break; 85 free_page((unsigned long)(queue->queue_pages)[i]); 86 } 87 return -ENOMEM; 88 } 89 90 static void hw_queue_dtor(struct hw_queue *queue) 91 { 92 int pages_per_kpage; 93 int i, nr_pages; 94 95 if (!queue || !queue->queue_pages) 96 return; 97 98 pages_per_kpage = PAGE_SIZE / queue->pagesize; 99 100 nr_pages = queue->queue_length / queue->pagesize; 101 102 for (i = 0; i < nr_pages; i += pages_per_kpage) 103 free_page((unsigned long)(queue->queue_pages)[i]); 104 105 kfree(queue->queue_pages); 106 } 107 108 struct ehea_cq *ehea_create_cq(struct ehea_adapter *adapter, 109 int nr_of_cqe, u64 eq_handle, u32 cq_token) 110 { 111 struct ehea_cq *cq; 112 u64 hret, rpage; 113 u32 counter; 114 int ret; 115 void *vpage; 116 117 cq = kzalloc(sizeof(*cq), GFP_KERNEL); 118 if (!cq) 119 goto out_nomem; 120 121 cq->attr.max_nr_of_cqes = nr_of_cqe; 122 cq->attr.cq_token = cq_token; 123 cq->attr.eq_handle = eq_handle; 124 125 cq->adapter = adapter; 126 127 hret = ehea_h_alloc_resource_cq(adapter->handle, &cq->attr, 128 &cq->fw_handle, &cq->epas); 129 if (hret != H_SUCCESS) { 130 pr_err("alloc_resource_cq failed\n"); 131 goto out_freemem; 132 } 133 134 ret = hw_queue_ctor(&cq->hw_queue, cq->attr.nr_pages, 135 EHEA_PAGESIZE, sizeof(struct ehea_cqe)); 136 if (ret) 137 goto out_freeres; 138 139 for (counter = 0; counter < cq->attr.nr_pages; counter++) { 140 vpage = hw_qpageit_get_inc(&cq->hw_queue); 141 if (!vpage) { 142 pr_err("hw_qpageit_get_inc failed\n"); 143 goto out_kill_hwq; 144 } 145 146 rpage = __pa(vpage); 147 hret = ehea_h_register_rpage(adapter->handle, 148 0, EHEA_CQ_REGISTER_ORIG, 149 cq->fw_handle, rpage, 1); 150 if (hret < H_SUCCESS) { 151 pr_err("register_rpage_cq failed ehea_cq=%p hret=%llx counter=%i act_pages=%i\n", 152 cq, hret, counter, cq->attr.nr_pages); 153 goto out_kill_hwq; 154 } 155 156 if (counter == (cq->attr.nr_pages - 1)) { 157 vpage = hw_qpageit_get_inc(&cq->hw_queue); 158 159 if ((hret != H_SUCCESS) || (vpage)) { 160 pr_err("registration of pages not complete hret=%llx\n", 161 hret); 162 goto out_kill_hwq; 163 } 164 } else { 165 if (hret != H_PAGE_REGISTERED) { 166 pr_err("CQ: registration of page failed hret=%llx\n", 167 hret); 168 goto out_kill_hwq; 169 } 170 } 171 } 172 173 hw_qeit_reset(&cq->hw_queue); 174 ehea_reset_cq_ep(cq); 175 ehea_reset_cq_n1(cq); 176 177 return cq; 178 179 out_kill_hwq: 180 hw_queue_dtor(&cq->hw_queue); 181 182 out_freeres: 183 ehea_h_free_resource(adapter->handle, cq->fw_handle, FORCE_FREE); 184 185 out_freemem: 186 kfree(cq); 187 188 out_nomem: 189 return NULL; 190 } 191 192 static u64 ehea_destroy_cq_res(struct ehea_cq *cq, u64 force) 193 { 194 u64 hret; 195 u64 adapter_handle = cq->adapter->handle; 196 197 /* deregister all previous registered pages */ 198 hret = ehea_h_free_resource(adapter_handle, cq->fw_handle, force); 199 if (hret != H_SUCCESS) 200 return hret; 201 202 hw_queue_dtor(&cq->hw_queue); 203 kfree(cq); 204 205 return hret; 206 } 207 208 int ehea_destroy_cq(struct ehea_cq *cq) 209 { 210 u64 hret, aer, aerr; 211 if (!cq) 212 return 0; 213 214 hcp_epas_dtor(&cq->epas); 215 hret = ehea_destroy_cq_res(cq, NORMAL_FREE); 216 if (hret == H_R_STATE) { 217 ehea_error_data(cq->adapter, cq->fw_handle, &aer, &aerr); 218 hret = ehea_destroy_cq_res(cq, FORCE_FREE); 219 } 220 221 if (hret != H_SUCCESS) { 222 pr_err("destroy CQ failed\n"); 223 return -EIO; 224 } 225 226 return 0; 227 } 228 229 struct ehea_eq *ehea_create_eq(struct ehea_adapter *adapter, 230 const enum ehea_eq_type type, 231 const u32 max_nr_of_eqes, const u8 eqe_gen) 232 { 233 int ret, i; 234 u64 hret, rpage; 235 void *vpage; 236 struct ehea_eq *eq; 237 238 eq = kzalloc(sizeof(*eq), GFP_KERNEL); 239 if (!eq) 240 return NULL; 241 242 eq->adapter = adapter; 243 eq->attr.type = type; 244 eq->attr.max_nr_of_eqes = max_nr_of_eqes; 245 eq->attr.eqe_gen = eqe_gen; 246 spin_lock_init(&eq->spinlock); 247 248 hret = ehea_h_alloc_resource_eq(adapter->handle, 249 &eq->attr, &eq->fw_handle); 250 if (hret != H_SUCCESS) { 251 pr_err("alloc_resource_eq failed\n"); 252 goto out_freemem; 253 } 254 255 ret = hw_queue_ctor(&eq->hw_queue, eq->attr.nr_pages, 256 EHEA_PAGESIZE, sizeof(struct ehea_eqe)); 257 if (ret) { 258 pr_err("can't allocate eq pages\n"); 259 goto out_freeres; 260 } 261 262 for (i = 0; i < eq->attr.nr_pages; i++) { 263 vpage = hw_qpageit_get_inc(&eq->hw_queue); 264 if (!vpage) { 265 pr_err("hw_qpageit_get_inc failed\n"); 266 hret = H_RESOURCE; 267 goto out_kill_hwq; 268 } 269 270 rpage = __pa(vpage); 271 272 hret = ehea_h_register_rpage(adapter->handle, 0, 273 EHEA_EQ_REGISTER_ORIG, 274 eq->fw_handle, rpage, 1); 275 276 if (i == (eq->attr.nr_pages - 1)) { 277 /* last page */ 278 vpage = hw_qpageit_get_inc(&eq->hw_queue); 279 if ((hret != H_SUCCESS) || (vpage)) 280 goto out_kill_hwq; 281 282 } else { 283 if (hret != H_PAGE_REGISTERED) 284 goto out_kill_hwq; 285 286 } 287 } 288 289 hw_qeit_reset(&eq->hw_queue); 290 return eq; 291 292 out_kill_hwq: 293 hw_queue_dtor(&eq->hw_queue); 294 295 out_freeres: 296 ehea_h_free_resource(adapter->handle, eq->fw_handle, FORCE_FREE); 297 298 out_freemem: 299 kfree(eq); 300 return NULL; 301 } 302 303 struct ehea_eqe *ehea_poll_eq(struct ehea_eq *eq) 304 { 305 struct ehea_eqe *eqe; 306 unsigned long flags; 307 308 spin_lock_irqsave(&eq->spinlock, flags); 309 eqe = hw_eqit_eq_get_inc_valid(&eq->hw_queue); 310 spin_unlock_irqrestore(&eq->spinlock, flags); 311 312 return eqe; 313 } 314 315 static u64 ehea_destroy_eq_res(struct ehea_eq *eq, u64 force) 316 { 317 u64 hret; 318 unsigned long flags; 319 320 spin_lock_irqsave(&eq->spinlock, flags); 321 322 hret = ehea_h_free_resource(eq->adapter->handle, eq->fw_handle, force); 323 spin_unlock_irqrestore(&eq->spinlock, flags); 324 325 if (hret != H_SUCCESS) 326 return hret; 327 328 hw_queue_dtor(&eq->hw_queue); 329 kfree(eq); 330 331 return hret; 332 } 333 334 int ehea_destroy_eq(struct ehea_eq *eq) 335 { 336 u64 hret, aer, aerr; 337 if (!eq) 338 return 0; 339 340 hcp_epas_dtor(&eq->epas); 341 342 hret = ehea_destroy_eq_res(eq, NORMAL_FREE); 343 if (hret == H_R_STATE) { 344 ehea_error_data(eq->adapter, eq->fw_handle, &aer, &aerr); 345 hret = ehea_destroy_eq_res(eq, FORCE_FREE); 346 } 347 348 if (hret != H_SUCCESS) { 349 pr_err("destroy EQ failed\n"); 350 return -EIO; 351 } 352 353 return 0; 354 } 355 356 /* allocates memory for a queue and registers pages in phyp */ 357 static int ehea_qp_alloc_register(struct ehea_qp *qp, struct hw_queue *hw_queue, 358 int nr_pages, int wqe_size, int act_nr_sges, 359 struct ehea_adapter *adapter, int h_call_q_selector) 360 { 361 u64 hret, rpage; 362 int ret, cnt; 363 void *vpage; 364 365 ret = hw_queue_ctor(hw_queue, nr_pages, EHEA_PAGESIZE, wqe_size); 366 if (ret) 367 return ret; 368 369 for (cnt = 0; cnt < nr_pages; cnt++) { 370 vpage = hw_qpageit_get_inc(hw_queue); 371 if (!vpage) { 372 pr_err("hw_qpageit_get_inc failed\n"); 373 goto out_kill_hwq; 374 } 375 rpage = __pa(vpage); 376 hret = ehea_h_register_rpage(adapter->handle, 377 0, h_call_q_selector, 378 qp->fw_handle, rpage, 1); 379 if (hret < H_SUCCESS) { 380 pr_err("register_rpage_qp failed\n"); 381 goto out_kill_hwq; 382 } 383 } 384 hw_qeit_reset(hw_queue); 385 return 0; 386 387 out_kill_hwq: 388 hw_queue_dtor(hw_queue); 389 return -EIO; 390 } 391 392 static inline u32 map_wqe_size(u8 wqe_enc_size) 393 { 394 return 128 << wqe_enc_size; 395 } 396 397 struct ehea_qp *ehea_create_qp(struct ehea_adapter *adapter, 398 u32 pd, struct ehea_qp_init_attr *init_attr) 399 { 400 int ret; 401 u64 hret; 402 struct ehea_qp *qp; 403 u32 wqe_size_in_bytes_sq, wqe_size_in_bytes_rq1; 404 u32 wqe_size_in_bytes_rq2, wqe_size_in_bytes_rq3; 405 406 407 qp = kzalloc(sizeof(*qp), GFP_KERNEL); 408 if (!qp) 409 return NULL; 410 411 qp->adapter = adapter; 412 413 hret = ehea_h_alloc_resource_qp(adapter->handle, init_attr, pd, 414 &qp->fw_handle, &qp->epas); 415 if (hret != H_SUCCESS) { 416 pr_err("ehea_h_alloc_resource_qp failed\n"); 417 goto out_freemem; 418 } 419 420 wqe_size_in_bytes_sq = map_wqe_size(init_attr->act_wqe_size_enc_sq); 421 wqe_size_in_bytes_rq1 = map_wqe_size(init_attr->act_wqe_size_enc_rq1); 422 wqe_size_in_bytes_rq2 = map_wqe_size(init_attr->act_wqe_size_enc_rq2); 423 wqe_size_in_bytes_rq3 = map_wqe_size(init_attr->act_wqe_size_enc_rq3); 424 425 ret = ehea_qp_alloc_register(qp, &qp->hw_squeue, init_attr->nr_sq_pages, 426 wqe_size_in_bytes_sq, 427 init_attr->act_wqe_size_enc_sq, adapter, 428 0); 429 if (ret) { 430 pr_err("can't register for sq ret=%x\n", ret); 431 goto out_freeres; 432 } 433 434 ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue1, 435 init_attr->nr_rq1_pages, 436 wqe_size_in_bytes_rq1, 437 init_attr->act_wqe_size_enc_rq1, 438 adapter, 1); 439 if (ret) { 440 pr_err("can't register for rq1 ret=%x\n", ret); 441 goto out_kill_hwsq; 442 } 443 444 if (init_attr->rq_count > 1) { 445 ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue2, 446 init_attr->nr_rq2_pages, 447 wqe_size_in_bytes_rq2, 448 init_attr->act_wqe_size_enc_rq2, 449 adapter, 2); 450 if (ret) { 451 pr_err("can't register for rq2 ret=%x\n", ret); 452 goto out_kill_hwr1q; 453 } 454 } 455 456 if (init_attr->rq_count > 2) { 457 ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue3, 458 init_attr->nr_rq3_pages, 459 wqe_size_in_bytes_rq3, 460 init_attr->act_wqe_size_enc_rq3, 461 adapter, 3); 462 if (ret) { 463 pr_err("can't register for rq3 ret=%x\n", ret); 464 goto out_kill_hwr2q; 465 } 466 } 467 468 qp->init_attr = *init_attr; 469 470 return qp; 471 472 out_kill_hwr2q: 473 hw_queue_dtor(&qp->hw_rqueue2); 474 475 out_kill_hwr1q: 476 hw_queue_dtor(&qp->hw_rqueue1); 477 478 out_kill_hwsq: 479 hw_queue_dtor(&qp->hw_squeue); 480 481 out_freeres: 482 ehea_h_disable_and_get_hea(adapter->handle, qp->fw_handle); 483 ehea_h_free_resource(adapter->handle, qp->fw_handle, FORCE_FREE); 484 485 out_freemem: 486 kfree(qp); 487 return NULL; 488 } 489 490 static u64 ehea_destroy_qp_res(struct ehea_qp *qp, u64 force) 491 { 492 u64 hret; 493 struct ehea_qp_init_attr *qp_attr = &qp->init_attr; 494 495 496 ehea_h_disable_and_get_hea(qp->adapter->handle, qp->fw_handle); 497 hret = ehea_h_free_resource(qp->adapter->handle, qp->fw_handle, force); 498 if (hret != H_SUCCESS) 499 return hret; 500 501 hw_queue_dtor(&qp->hw_squeue); 502 hw_queue_dtor(&qp->hw_rqueue1); 503 504 if (qp_attr->rq_count > 1) 505 hw_queue_dtor(&qp->hw_rqueue2); 506 if (qp_attr->rq_count > 2) 507 hw_queue_dtor(&qp->hw_rqueue3); 508 kfree(qp); 509 510 return hret; 511 } 512 513 int ehea_destroy_qp(struct ehea_qp *qp) 514 { 515 u64 hret, aer, aerr; 516 if (!qp) 517 return 0; 518 519 hcp_epas_dtor(&qp->epas); 520 521 hret = ehea_destroy_qp_res(qp, NORMAL_FREE); 522 if (hret == H_R_STATE) { 523 ehea_error_data(qp->adapter, qp->fw_handle, &aer, &aerr); 524 hret = ehea_destroy_qp_res(qp, FORCE_FREE); 525 } 526 527 if (hret != H_SUCCESS) { 528 pr_err("destroy QP failed\n"); 529 return -EIO; 530 } 531 532 return 0; 533 } 534 535 static inline int ehea_calc_index(unsigned long i, unsigned long s) 536 { 537 return (i >> s) & EHEA_INDEX_MASK; 538 } 539 540 static inline int ehea_init_top_bmap(struct ehea_top_bmap *ehea_top_bmap, 541 int dir) 542 { 543 if (!ehea_top_bmap->dir[dir]) { 544 ehea_top_bmap->dir[dir] = 545 kzalloc(sizeof(struct ehea_dir_bmap), GFP_KERNEL); 546 if (!ehea_top_bmap->dir[dir]) 547 return -ENOMEM; 548 } 549 return 0; 550 } 551 552 static inline int ehea_init_bmap(struct ehea_bmap *ehea_bmap, int top, int dir) 553 { 554 if (!ehea_bmap->top[top]) { 555 ehea_bmap->top[top] = 556 kzalloc(sizeof(struct ehea_top_bmap), GFP_KERNEL); 557 if (!ehea_bmap->top[top]) 558 return -ENOMEM; 559 } 560 return ehea_init_top_bmap(ehea_bmap->top[top], dir); 561 } 562 563 static DEFINE_MUTEX(ehea_busmap_mutex); 564 static unsigned long ehea_mr_len; 565 566 #define EHEA_BUSMAP_ADD_SECT 1 567 #define EHEA_BUSMAP_REM_SECT 0 568 569 static void ehea_rebuild_busmap(void) 570 { 571 u64 vaddr = EHEA_BUSMAP_START; 572 int top, dir, idx; 573 574 for (top = 0; top < EHEA_MAP_ENTRIES; top++) { 575 struct ehea_top_bmap *ehea_top; 576 int valid_dir_entries = 0; 577 578 if (!ehea_bmap->top[top]) 579 continue; 580 ehea_top = ehea_bmap->top[top]; 581 for (dir = 0; dir < EHEA_MAP_ENTRIES; dir++) { 582 struct ehea_dir_bmap *ehea_dir; 583 int valid_entries = 0; 584 585 if (!ehea_top->dir[dir]) 586 continue; 587 valid_dir_entries++; 588 ehea_dir = ehea_top->dir[dir]; 589 for (idx = 0; idx < EHEA_MAP_ENTRIES; idx++) { 590 if (!ehea_dir->ent[idx]) 591 continue; 592 valid_entries++; 593 ehea_dir->ent[idx] = vaddr; 594 vaddr += EHEA_SECTSIZE; 595 } 596 if (!valid_entries) { 597 ehea_top->dir[dir] = NULL; 598 kfree(ehea_dir); 599 } 600 } 601 if (!valid_dir_entries) { 602 ehea_bmap->top[top] = NULL; 603 kfree(ehea_top); 604 } 605 } 606 } 607 608 static int ehea_update_busmap(unsigned long pfn, unsigned long nr_pages, int add) 609 { 610 unsigned long i, start_section, end_section; 611 612 if (!nr_pages) 613 return 0; 614 615 if (!ehea_bmap) { 616 ehea_bmap = kzalloc(sizeof(struct ehea_bmap), GFP_KERNEL); 617 if (!ehea_bmap) 618 return -ENOMEM; 619 } 620 621 start_section = (pfn * PAGE_SIZE) / EHEA_SECTSIZE; 622 end_section = start_section + ((nr_pages * PAGE_SIZE) / EHEA_SECTSIZE); 623 /* Mark entries as valid or invalid only; address is assigned later */ 624 for (i = start_section; i < end_section; i++) { 625 u64 flag; 626 int top = ehea_calc_index(i, EHEA_TOP_INDEX_SHIFT); 627 int dir = ehea_calc_index(i, EHEA_DIR_INDEX_SHIFT); 628 int idx = i & EHEA_INDEX_MASK; 629 630 if (add) { 631 int ret = ehea_init_bmap(ehea_bmap, top, dir); 632 if (ret) 633 return ret; 634 flag = 1; /* valid */ 635 ehea_mr_len += EHEA_SECTSIZE; 636 } else { 637 if (!ehea_bmap->top[top]) 638 continue; 639 if (!ehea_bmap->top[top]->dir[dir]) 640 continue; 641 flag = 0; /* invalid */ 642 ehea_mr_len -= EHEA_SECTSIZE; 643 } 644 645 ehea_bmap->top[top]->dir[dir]->ent[idx] = flag; 646 } 647 ehea_rebuild_busmap(); /* Assign contiguous addresses for mr */ 648 return 0; 649 } 650 651 int ehea_add_sect_bmap(unsigned long pfn, unsigned long nr_pages) 652 { 653 int ret; 654 655 mutex_lock(&ehea_busmap_mutex); 656 ret = ehea_update_busmap(pfn, nr_pages, EHEA_BUSMAP_ADD_SECT); 657 mutex_unlock(&ehea_busmap_mutex); 658 return ret; 659 } 660 661 int ehea_rem_sect_bmap(unsigned long pfn, unsigned long nr_pages) 662 { 663 int ret; 664 665 mutex_lock(&ehea_busmap_mutex); 666 ret = ehea_update_busmap(pfn, nr_pages, EHEA_BUSMAP_REM_SECT); 667 mutex_unlock(&ehea_busmap_mutex); 668 return ret; 669 } 670 671 static int ehea_is_hugepage(unsigned long pfn) 672 { 673 if (pfn & EHEA_HUGEPAGE_PFN_MASK) 674 return 0; 675 676 if (page_shift(pfn_to_page(pfn)) != EHEA_HUGEPAGESHIFT) 677 return 0; 678 679 return 1; 680 } 681 682 static int ehea_create_busmap_callback(unsigned long initial_pfn, 683 unsigned long total_nr_pages, void *arg) 684 { 685 int ret; 686 unsigned long pfn, start_pfn, end_pfn, nr_pages; 687 688 if ((total_nr_pages * PAGE_SIZE) < EHEA_HUGEPAGE_SIZE) 689 return ehea_update_busmap(initial_pfn, total_nr_pages, 690 EHEA_BUSMAP_ADD_SECT); 691 692 /* Given chunk is >= 16GB -> check for hugepages */ 693 start_pfn = initial_pfn; 694 end_pfn = initial_pfn + total_nr_pages; 695 pfn = start_pfn; 696 697 while (pfn < end_pfn) { 698 if (ehea_is_hugepage(pfn)) { 699 /* Add mem found in front of the hugepage */ 700 nr_pages = pfn - start_pfn; 701 ret = ehea_update_busmap(start_pfn, nr_pages, 702 EHEA_BUSMAP_ADD_SECT); 703 if (ret) 704 return ret; 705 706 /* Skip the hugepage */ 707 pfn += (EHEA_HUGEPAGE_SIZE / PAGE_SIZE); 708 start_pfn = pfn; 709 } else 710 pfn += (EHEA_SECTSIZE / PAGE_SIZE); 711 } 712 713 /* Add mem found behind the hugepage(s) */ 714 nr_pages = pfn - start_pfn; 715 return ehea_update_busmap(start_pfn, nr_pages, EHEA_BUSMAP_ADD_SECT); 716 } 717 718 int ehea_create_busmap(void) 719 { 720 int ret; 721 722 mutex_lock(&ehea_busmap_mutex); 723 ehea_mr_len = 0; 724 ret = walk_system_ram_range(0, 1ULL << MAX_PHYSMEM_BITS, NULL, 725 ehea_create_busmap_callback); 726 mutex_unlock(&ehea_busmap_mutex); 727 return ret; 728 } 729 730 void ehea_destroy_busmap(void) 731 { 732 int top, dir; 733 mutex_lock(&ehea_busmap_mutex); 734 if (!ehea_bmap) 735 goto out_destroy; 736 737 for (top = 0; top < EHEA_MAP_ENTRIES; top++) { 738 if (!ehea_bmap->top[top]) 739 continue; 740 741 for (dir = 0; dir < EHEA_MAP_ENTRIES; dir++) { 742 if (!ehea_bmap->top[top]->dir[dir]) 743 continue; 744 745 kfree(ehea_bmap->top[top]->dir[dir]); 746 } 747 748 kfree(ehea_bmap->top[top]); 749 } 750 751 kfree(ehea_bmap); 752 ehea_bmap = NULL; 753 out_destroy: 754 mutex_unlock(&ehea_busmap_mutex); 755 } 756 757 u64 ehea_map_vaddr(void *caddr) 758 { 759 int top, dir, idx; 760 unsigned long index, offset; 761 762 if (!ehea_bmap) 763 return EHEA_INVAL_ADDR; 764 765 index = __pa(caddr) >> SECTION_SIZE_BITS; 766 top = (index >> EHEA_TOP_INDEX_SHIFT) & EHEA_INDEX_MASK; 767 if (!ehea_bmap->top[top]) 768 return EHEA_INVAL_ADDR; 769 770 dir = (index >> EHEA_DIR_INDEX_SHIFT) & EHEA_INDEX_MASK; 771 if (!ehea_bmap->top[top]->dir[dir]) 772 return EHEA_INVAL_ADDR; 773 774 idx = index & EHEA_INDEX_MASK; 775 if (!ehea_bmap->top[top]->dir[dir]->ent[idx]) 776 return EHEA_INVAL_ADDR; 777 778 offset = (unsigned long)caddr & (EHEA_SECTSIZE - 1); 779 return ehea_bmap->top[top]->dir[dir]->ent[idx] | offset; 780 } 781 782 static inline void *ehea_calc_sectbase(int top, int dir, int idx) 783 { 784 unsigned long ret = idx; 785 ret |= dir << EHEA_DIR_INDEX_SHIFT; 786 ret |= top << EHEA_TOP_INDEX_SHIFT; 787 return __va(ret << SECTION_SIZE_BITS); 788 } 789 790 static u64 ehea_reg_mr_section(int top, int dir, int idx, u64 *pt, 791 struct ehea_adapter *adapter, 792 struct ehea_mr *mr) 793 { 794 void *pg; 795 u64 j, m, hret; 796 unsigned long k = 0; 797 u64 pt_abs = __pa(pt); 798 799 void *sectbase = ehea_calc_sectbase(top, dir, idx); 800 801 for (j = 0; j < (EHEA_PAGES_PER_SECTION / EHEA_MAX_RPAGE); j++) { 802 803 for (m = 0; m < EHEA_MAX_RPAGE; m++) { 804 pg = sectbase + ((k++) * EHEA_PAGESIZE); 805 pt[m] = __pa(pg); 806 } 807 hret = ehea_h_register_rpage_mr(adapter->handle, mr->handle, 0, 808 0, pt_abs, EHEA_MAX_RPAGE); 809 810 if ((hret != H_SUCCESS) && 811 (hret != H_PAGE_REGISTERED)) { 812 ehea_h_free_resource(adapter->handle, mr->handle, 813 FORCE_FREE); 814 pr_err("register_rpage_mr failed\n"); 815 return hret; 816 } 817 } 818 return hret; 819 } 820 821 static u64 ehea_reg_mr_sections(int top, int dir, u64 *pt, 822 struct ehea_adapter *adapter, 823 struct ehea_mr *mr) 824 { 825 u64 hret = H_SUCCESS; 826 int idx; 827 828 for (idx = 0; idx < EHEA_MAP_ENTRIES; idx++) { 829 if (!ehea_bmap->top[top]->dir[dir]->ent[idx]) 830 continue; 831 832 hret = ehea_reg_mr_section(top, dir, idx, pt, adapter, mr); 833 if ((hret != H_SUCCESS) && (hret != H_PAGE_REGISTERED)) 834 return hret; 835 } 836 return hret; 837 } 838 839 static u64 ehea_reg_mr_dir_sections(int top, u64 *pt, 840 struct ehea_adapter *adapter, 841 struct ehea_mr *mr) 842 { 843 u64 hret = H_SUCCESS; 844 int dir; 845 846 for (dir = 0; dir < EHEA_MAP_ENTRIES; dir++) { 847 if (!ehea_bmap->top[top]->dir[dir]) 848 continue; 849 850 hret = ehea_reg_mr_sections(top, dir, pt, adapter, mr); 851 if ((hret != H_SUCCESS) && (hret != H_PAGE_REGISTERED)) 852 return hret; 853 } 854 return hret; 855 } 856 857 int ehea_reg_kernel_mr(struct ehea_adapter *adapter, struct ehea_mr *mr) 858 { 859 int ret; 860 u64 *pt; 861 u64 hret; 862 u32 acc_ctrl = EHEA_MR_ACC_CTRL; 863 864 unsigned long top; 865 866 pt = (void *)get_zeroed_page(GFP_KERNEL); 867 if (!pt) { 868 pr_err("no mem\n"); 869 ret = -ENOMEM; 870 goto out; 871 } 872 873 hret = ehea_h_alloc_resource_mr(adapter->handle, EHEA_BUSMAP_START, 874 ehea_mr_len, acc_ctrl, adapter->pd, 875 &mr->handle, &mr->lkey); 876 877 if (hret != H_SUCCESS) { 878 pr_err("alloc_resource_mr failed\n"); 879 ret = -EIO; 880 goto out; 881 } 882 883 if (!ehea_bmap) { 884 ehea_h_free_resource(adapter->handle, mr->handle, FORCE_FREE); 885 pr_err("no busmap available\n"); 886 ret = -EIO; 887 goto out; 888 } 889 890 for (top = 0; top < EHEA_MAP_ENTRIES; top++) { 891 if (!ehea_bmap->top[top]) 892 continue; 893 894 hret = ehea_reg_mr_dir_sections(top, pt, adapter, mr); 895 if((hret != H_PAGE_REGISTERED) && (hret != H_SUCCESS)) 896 break; 897 } 898 899 if (hret != H_SUCCESS) { 900 ehea_h_free_resource(adapter->handle, mr->handle, FORCE_FREE); 901 pr_err("registering mr failed\n"); 902 ret = -EIO; 903 goto out; 904 } 905 906 mr->vaddr = EHEA_BUSMAP_START; 907 mr->adapter = adapter; 908 ret = 0; 909 out: 910 free_page((unsigned long)pt); 911 return ret; 912 } 913 914 int ehea_rem_mr(struct ehea_mr *mr) 915 { 916 u64 hret; 917 918 if (!mr || !mr->adapter) 919 return -EINVAL; 920 921 hret = ehea_h_free_resource(mr->adapter->handle, mr->handle, 922 FORCE_FREE); 923 if (hret != H_SUCCESS) { 924 pr_err("destroy MR failed\n"); 925 return -EIO; 926 } 927 928 return 0; 929 } 930 931 int ehea_gen_smr(struct ehea_adapter *adapter, struct ehea_mr *old_mr, 932 struct ehea_mr *shared_mr) 933 { 934 u64 hret; 935 936 hret = ehea_h_register_smr(adapter->handle, old_mr->handle, 937 old_mr->vaddr, EHEA_MR_ACC_CTRL, 938 adapter->pd, shared_mr); 939 if (hret != H_SUCCESS) 940 return -EIO; 941 942 shared_mr->adapter = adapter; 943 944 return 0; 945 } 946 947 static void print_error_data(u64 *data) 948 { 949 int length; 950 u64 type = EHEA_BMASK_GET(ERROR_DATA_TYPE, data[2]); 951 u64 resource = data[1]; 952 953 length = EHEA_BMASK_GET(ERROR_DATA_LENGTH, data[0]); 954 955 if (length > EHEA_PAGESIZE) 956 length = EHEA_PAGESIZE; 957 958 if (type == EHEA_AER_RESTYPE_QP) 959 pr_err("QP (resource=%llX) state: AER=0x%llX, AERR=0x%llX, port=%llX\n", 960 resource, data[6], data[12], data[22]); 961 else if (type == EHEA_AER_RESTYPE_CQ) 962 pr_err("CQ (resource=%llX) state: AER=0x%llX\n", 963 resource, data[6]); 964 else if (type == EHEA_AER_RESTYPE_EQ) 965 pr_err("EQ (resource=%llX) state: AER=0x%llX\n", 966 resource, data[6]); 967 968 ehea_dump(data, length, "error data"); 969 } 970 971 u64 ehea_error_data(struct ehea_adapter *adapter, u64 res_handle, 972 u64 *aer, u64 *aerr) 973 { 974 unsigned long ret; 975 u64 *rblock; 976 u64 type = 0; 977 978 rblock = (void *)get_zeroed_page(GFP_KERNEL); 979 if (!rblock) { 980 pr_err("Cannot allocate rblock memory\n"); 981 goto out; 982 } 983 984 ret = ehea_h_error_data(adapter->handle, res_handle, rblock); 985 986 if (ret == H_SUCCESS) { 987 type = EHEA_BMASK_GET(ERROR_DATA_TYPE, rblock[2]); 988 *aer = rblock[6]; 989 *aerr = rblock[12]; 990 print_error_data(rblock); 991 } else if (ret == H_R_STATE) { 992 pr_err("No error data available: %llX\n", res_handle); 993 } else 994 pr_err("Error data could not be fetched: %llX\n", res_handle); 995 996 free_page((unsigned long)rblock); 997 out: 998 return type; 999 } 1000