1/* 2 * linux/drivers/net/ethernet/ibm/ehea/ehea_qmr.c 3 * 4 * eHEA ethernet device driver for IBM eServer System p 5 * 6 * (C) Copyright IBM Corp. 2006 7 * 8 * Authors: 9 * Christoph Raisch <raisch@de.ibm.com> 10 * Jan-Bernd Themann <themann@de.ibm.com> 11 * Thomas Klein <tklein@de.ibm.com> 12 * 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License as published by 16 * the Free Software Foundation; either version 2, or (at your option) 17 * any later version. 18 * 19 * This program is distributed in the hope that it will be useful, 20 * but WITHOUT ANY WARRANTY; without even the implied warranty of 21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 22 * GNU General Public License for more details. 23 * 24 * You should have received a copy of the GNU General Public License 25 * along with this program; if not, write to the Free Software 26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 27 */ 28 29#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 30 31#include <linux/mm.h> 32#include <linux/slab.h> 33#include "ehea.h" 34#include "ehea_phyp.h" 35#include "ehea_qmr.h" 36 37static struct ehea_bmap *ehea_bmap; 38 39static void *hw_qpageit_get_inc(struct hw_queue *queue) 40{ 41 void *retvalue = hw_qeit_get(queue); 42 43 queue->current_q_offset += queue->pagesize; 44 if (queue->current_q_offset > queue->queue_length) { 45 queue->current_q_offset -= queue->pagesize; 46 retvalue = NULL; 47 } else if (((u64) retvalue) & (EHEA_PAGESIZE-1)) { 48 pr_err("not on pageboundary\n"); 49 retvalue = NULL; 50 } 51 return retvalue; 52} 53 54static int hw_queue_ctor(struct hw_queue *queue, const u32 nr_of_pages, 55 const u32 pagesize, const u32 qe_size) 56{ 57 int pages_per_kpage = PAGE_SIZE / pagesize; 58 int i, k; 59 60 if ((pagesize > PAGE_SIZE) || (!pages_per_kpage)) { 61 pr_err("pagesize conflict! kernel pagesize=%d, ehea pagesize=%d\n", 62 (int)PAGE_SIZE, (int)pagesize); 63 return -EINVAL; 64 } 65 66 queue->queue_length = nr_of_pages * pagesize; 67 queue->queue_pages = kmalloc_array(nr_of_pages, sizeof(void *), 68 GFP_KERNEL); 69 if (!queue->queue_pages) 70 return -ENOMEM; 71 72 /* 73 * allocate pages for queue: 74 * outer loop allocates whole kernel pages (page aligned) and 75 * inner loop divides a kernel page into smaller hea queue pages 76 */ 77 i = 0; 78 while (i < nr_of_pages) { 79 u8 *kpage = (u8 *)get_zeroed_page(GFP_KERNEL); 80 if (!kpage) 81 goto out_nomem; 82 for (k = 0; k < pages_per_kpage && i < nr_of_pages; k++) { 83 (queue->queue_pages)[i] = (struct ehea_page *)kpage; 84 kpage += pagesize; 85 i++; 86 } 87 } 88 89 queue->current_q_offset = 0; 90 queue->qe_size = qe_size; 91 queue->pagesize = pagesize; 92 queue->toggle_state = 1; 93 94 return 0; 95out_nomem: 96 for (i = 0; i < nr_of_pages; i += pages_per_kpage) { 97 if (!(queue->queue_pages)[i]) 98 break; 99 free_page((unsigned long)(queue->queue_pages)[i]); 100 } 101 return -ENOMEM; 102} 103 104static void hw_queue_dtor(struct hw_queue *queue) 105{ 106 int pages_per_kpage; 107 int i, nr_pages; 108 109 if (!queue || !queue->queue_pages) 110 return; 111 112 pages_per_kpage = PAGE_SIZE / queue->pagesize; 113 114 nr_pages = queue->queue_length / queue->pagesize; 115 116 for (i = 0; i < nr_pages; i += pages_per_kpage) 117 free_page((unsigned long)(queue->queue_pages)[i]); 118 119 kfree(queue->queue_pages); 120} 121 122struct ehea_cq *ehea_create_cq(struct ehea_adapter *adapter, 123 int nr_of_cqe, u64 eq_handle, u32 cq_token) 124{ 125 struct ehea_cq *cq; 126 struct h_epa epa; 127 u64 *cq_handle_ref, hret, rpage; 128 u32 act_nr_of_entries, act_pages, counter; 129 int ret; 130 void *vpage; 131 132 cq = kzalloc(sizeof(*cq), GFP_KERNEL); 133 if (!cq) 134 goto out_nomem; 135 136 cq->attr.max_nr_of_cqes = nr_of_cqe; 137 cq->attr.cq_token = cq_token; 138 cq->attr.eq_handle = eq_handle; 139 140 cq->adapter = adapter; 141 142 cq_handle_ref = &cq->fw_handle; 143 act_nr_of_entries = 0; 144 act_pages = 0; 145 146 hret = ehea_h_alloc_resource_cq(adapter->handle, &cq->attr, 147 &cq->fw_handle, &cq->epas); 148 if (hret != H_SUCCESS) { 149 pr_err("alloc_resource_cq failed\n"); 150 goto out_freemem; 151 } 152 153 ret = hw_queue_ctor(&cq->hw_queue, cq->attr.nr_pages, 154 EHEA_PAGESIZE, sizeof(struct ehea_cqe)); 155 if (ret) 156 goto out_freeres; 157 158 for (counter = 0; counter < cq->attr.nr_pages; counter++) { 159 vpage = hw_qpageit_get_inc(&cq->hw_queue); 160 if (!vpage) { 161 pr_err("hw_qpageit_get_inc failed\n"); 162 goto out_kill_hwq; 163 } 164 165 rpage = __pa(vpage); 166 hret = ehea_h_register_rpage(adapter->handle, 167 0, EHEA_CQ_REGISTER_ORIG, 168 cq->fw_handle, rpage, 1); 169 if (hret < H_SUCCESS) { 170 pr_err("register_rpage_cq failed ehea_cq=%p hret=%llx counter=%i act_pages=%i\n", 171 cq, hret, counter, cq->attr.nr_pages); 172 goto out_kill_hwq; 173 } 174 175 if (counter == (cq->attr.nr_pages - 1)) { 176 vpage = hw_qpageit_get_inc(&cq->hw_queue); 177 178 if ((hret != H_SUCCESS) || (vpage)) { 179 pr_err("registration of pages not complete hret=%llx\n", 180 hret); 181 goto out_kill_hwq; 182 } 183 } else { 184 if (hret != H_PAGE_REGISTERED) { 185 pr_err("CQ: registration of page failed hret=%llx\n", 186 hret); 187 goto out_kill_hwq; 188 } 189 } 190 } 191 192 hw_qeit_reset(&cq->hw_queue); 193 epa = cq->epas.kernel; 194 ehea_reset_cq_ep(cq); 195 ehea_reset_cq_n1(cq); 196 197 return cq; 198 199out_kill_hwq: 200 hw_queue_dtor(&cq->hw_queue); 201 202out_freeres: 203 ehea_h_free_resource(adapter->handle, cq->fw_handle, FORCE_FREE); 204 205out_freemem: 206 kfree(cq); 207 208out_nomem: 209 return NULL; 210} 211 212static u64 ehea_destroy_cq_res(struct ehea_cq *cq, u64 force) 213{ 214 u64 hret; 215 u64 adapter_handle = cq->adapter->handle; 216 217 /* deregister all previous registered pages */ 218 hret = ehea_h_free_resource(adapter_handle, cq->fw_handle, force); 219 if (hret != H_SUCCESS) 220 return hret; 221 222 hw_queue_dtor(&cq->hw_queue); 223 kfree(cq); 224 225 return hret; 226} 227 228int ehea_destroy_cq(struct ehea_cq *cq) 229{ 230 u64 hret, aer, aerr; 231 if (!cq) 232 return 0; 233 234 hcp_epas_dtor(&cq->epas); 235 hret = ehea_destroy_cq_res(cq, NORMAL_FREE); 236 if (hret == H_R_STATE) { 237 ehea_error_data(cq->adapter, cq->fw_handle, &aer, &aerr); 238 hret = ehea_destroy_cq_res(cq, FORCE_FREE); 239 } 240 241 if (hret != H_SUCCESS) { 242 pr_err("destroy CQ failed\n"); 243 return -EIO; 244 } 245 246 return 0; 247} 248 249struct ehea_eq *ehea_create_eq(struct ehea_adapter *adapter, 250 const enum ehea_eq_type type, 251 const u32 max_nr_of_eqes, const u8 eqe_gen) 252{ 253 int ret, i; 254 u64 hret, rpage; 255 void *vpage; 256 struct ehea_eq *eq; 257 258 eq = kzalloc(sizeof(*eq), GFP_KERNEL); 259 if (!eq) 260 return NULL; 261 262 eq->adapter = adapter; 263 eq->attr.type = type; 264 eq->attr.max_nr_of_eqes = max_nr_of_eqes; 265 eq->attr.eqe_gen = eqe_gen; 266 spin_lock_init(&eq->spinlock); 267 268 hret = ehea_h_alloc_resource_eq(adapter->handle, 269 &eq->attr, &eq->fw_handle); 270 if (hret != H_SUCCESS) { 271 pr_err("alloc_resource_eq failed\n"); 272 goto out_freemem; 273 } 274 275 ret = hw_queue_ctor(&eq->hw_queue, eq->attr.nr_pages, 276 EHEA_PAGESIZE, sizeof(struct ehea_eqe)); 277 if (ret) { 278 pr_err("can't allocate eq pages\n"); 279 goto out_freeres; 280 } 281 282 for (i = 0; i < eq->attr.nr_pages; i++) { 283 vpage = hw_qpageit_get_inc(&eq->hw_queue); 284 if (!vpage) { 285 pr_err("hw_qpageit_get_inc failed\n"); 286 hret = H_RESOURCE; 287 goto out_kill_hwq; 288 } 289 290 rpage = __pa(vpage); 291 292 hret = ehea_h_register_rpage(adapter->handle, 0, 293 EHEA_EQ_REGISTER_ORIG, 294 eq->fw_handle, rpage, 1); 295 296 if (i == (eq->attr.nr_pages - 1)) { 297 /* last page */ 298 vpage = hw_qpageit_get_inc(&eq->hw_queue); 299 if ((hret != H_SUCCESS) || (vpage)) 300 goto out_kill_hwq; 301 302 } else { 303 if (hret != H_PAGE_REGISTERED) 304 goto out_kill_hwq; 305 306 } 307 } 308 309 hw_qeit_reset(&eq->hw_queue); 310 return eq; 311 312out_kill_hwq: 313 hw_queue_dtor(&eq->hw_queue); 314 315out_freeres: 316 ehea_h_free_resource(adapter->handle, eq->fw_handle, FORCE_FREE); 317 318out_freemem: 319 kfree(eq); 320 return NULL; 321} 322 323struct ehea_eqe *ehea_poll_eq(struct ehea_eq *eq) 324{ 325 struct ehea_eqe *eqe; 326 unsigned long flags; 327 328 spin_lock_irqsave(&eq->spinlock, flags); 329 eqe = hw_eqit_eq_get_inc_valid(&eq->hw_queue); 330 spin_unlock_irqrestore(&eq->spinlock, flags); 331 332 return eqe; 333} 334 335static u64 ehea_destroy_eq_res(struct ehea_eq *eq, u64 force) 336{ 337 u64 hret; 338 unsigned long flags; 339 340 spin_lock_irqsave(&eq->spinlock, flags); 341 342 hret = ehea_h_free_resource(eq->adapter->handle, eq->fw_handle, force); 343 spin_unlock_irqrestore(&eq->spinlock, flags); 344 345 if (hret != H_SUCCESS) 346 return hret; 347 348 hw_queue_dtor(&eq->hw_queue); 349 kfree(eq); 350 351 return hret; 352} 353 354int ehea_destroy_eq(struct ehea_eq *eq) 355{ 356 u64 hret, aer, aerr; 357 if (!eq) 358 return 0; 359 360 hcp_epas_dtor(&eq->epas); 361 362 hret = ehea_destroy_eq_res(eq, NORMAL_FREE); 363 if (hret == H_R_STATE) { 364 ehea_error_data(eq->adapter, eq->fw_handle, &aer, &aerr); 365 hret = ehea_destroy_eq_res(eq, FORCE_FREE); 366 } 367 368 if (hret != H_SUCCESS) { 369 pr_err("destroy EQ failed\n"); 370 return -EIO; 371 } 372 373 return 0; 374} 375 376/* allocates memory for a queue and registers pages in phyp */ 377static int ehea_qp_alloc_register(struct ehea_qp *qp, struct hw_queue *hw_queue, 378 int nr_pages, int wqe_size, int act_nr_sges, 379 struct ehea_adapter *adapter, int h_call_q_selector) 380{ 381 u64 hret, rpage; 382 int ret, cnt; 383 void *vpage; 384 385 ret = hw_queue_ctor(hw_queue, nr_pages, EHEA_PAGESIZE, wqe_size); 386 if (ret) 387 return ret; 388 389 for (cnt = 0; cnt < nr_pages; cnt++) { 390 vpage = hw_qpageit_get_inc(hw_queue); 391 if (!vpage) { 392 pr_err("hw_qpageit_get_inc failed\n"); 393 goto out_kill_hwq; 394 } 395 rpage = __pa(vpage); 396 hret = ehea_h_register_rpage(adapter->handle, 397 0, h_call_q_selector, 398 qp->fw_handle, rpage, 1); 399 if (hret < H_SUCCESS) { 400 pr_err("register_rpage_qp failed\n"); 401 goto out_kill_hwq; 402 } 403 } 404 hw_qeit_reset(hw_queue); 405 return 0; 406 407out_kill_hwq: 408 hw_queue_dtor(hw_queue); 409 return -EIO; 410} 411 412static inline u32 map_wqe_size(u8 wqe_enc_size) 413{ 414 return 128 << wqe_enc_size; 415} 416 417struct ehea_qp *ehea_create_qp(struct ehea_adapter *adapter, 418 u32 pd, struct ehea_qp_init_attr *init_attr) 419{ 420 int ret; 421 u64 hret; 422 struct ehea_qp *qp; 423 u32 wqe_size_in_bytes_sq, wqe_size_in_bytes_rq1; 424 u32 wqe_size_in_bytes_rq2, wqe_size_in_bytes_rq3; 425 426 427 qp = kzalloc(sizeof(*qp), GFP_KERNEL); 428 if (!qp) 429 return NULL; 430 431 qp->adapter = adapter; 432 433 hret = ehea_h_alloc_resource_qp(adapter->handle, init_attr, pd, 434 &qp->fw_handle, &qp->epas); 435 if (hret != H_SUCCESS) { 436 pr_err("ehea_h_alloc_resource_qp failed\n"); 437 goto out_freemem; 438 } 439 440 wqe_size_in_bytes_sq = map_wqe_size(init_attr->act_wqe_size_enc_sq); 441 wqe_size_in_bytes_rq1 = map_wqe_size(init_attr->act_wqe_size_enc_rq1); 442 wqe_size_in_bytes_rq2 = map_wqe_size(init_attr->act_wqe_size_enc_rq2); 443 wqe_size_in_bytes_rq3 = map_wqe_size(init_attr->act_wqe_size_enc_rq3); 444 445 ret = ehea_qp_alloc_register(qp, &qp->hw_squeue, init_attr->nr_sq_pages, 446 wqe_size_in_bytes_sq, 447 init_attr->act_wqe_size_enc_sq, adapter, 448 0); 449 if (ret) { 450 pr_err("can't register for sq ret=%x\n", ret); 451 goto out_freeres; 452 } 453 454 ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue1, 455 init_attr->nr_rq1_pages, 456 wqe_size_in_bytes_rq1, 457 init_attr->act_wqe_size_enc_rq1, 458 adapter, 1); 459 if (ret) { 460 pr_err("can't register for rq1 ret=%x\n", ret); 461 goto out_kill_hwsq; 462 } 463 464 if (init_attr->rq_count > 1) { 465 ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue2, 466 init_attr->nr_rq2_pages, 467 wqe_size_in_bytes_rq2, 468 init_attr->act_wqe_size_enc_rq2, 469 adapter, 2); 470 if (ret) { 471 pr_err("can't register for rq2 ret=%x\n", ret); 472 goto out_kill_hwr1q; 473 } 474 } 475 476 if (init_attr->rq_count > 2) { 477 ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue3, 478 init_attr->nr_rq3_pages, 479 wqe_size_in_bytes_rq3, 480 init_attr->act_wqe_size_enc_rq3, 481 adapter, 3); 482 if (ret) { 483 pr_err("can't register for rq3 ret=%x\n", ret); 484 goto out_kill_hwr2q; 485 } 486 } 487 488 qp->init_attr = *init_attr; 489 490 return qp; 491 492out_kill_hwr2q: 493 hw_queue_dtor(&qp->hw_rqueue2); 494 495out_kill_hwr1q: 496 hw_queue_dtor(&qp->hw_rqueue1); 497 498out_kill_hwsq: 499 hw_queue_dtor(&qp->hw_squeue); 500 501out_freeres: 502 ehea_h_disable_and_get_hea(adapter->handle, qp->fw_handle); 503 ehea_h_free_resource(adapter->handle, qp->fw_handle, FORCE_FREE); 504 505out_freemem: 506 kfree(qp); 507 return NULL; 508} 509 510static u64 ehea_destroy_qp_res(struct ehea_qp *qp, u64 force) 511{ 512 u64 hret; 513 struct ehea_qp_init_attr *qp_attr = &qp->init_attr; 514 515 516 ehea_h_disable_and_get_hea(qp->adapter->handle, qp->fw_handle); 517 hret = ehea_h_free_resource(qp->adapter->handle, qp->fw_handle, force); 518 if (hret != H_SUCCESS) 519 return hret; 520 521 hw_queue_dtor(&qp->hw_squeue); 522 hw_queue_dtor(&qp->hw_rqueue1); 523 524 if (qp_attr->rq_count > 1) 525 hw_queue_dtor(&qp->hw_rqueue2); 526 if (qp_attr->rq_count > 2) 527 hw_queue_dtor(&qp->hw_rqueue3); 528 kfree(qp); 529 530 return hret; 531} 532 533int ehea_destroy_qp(struct ehea_qp *qp) 534{ 535 u64 hret, aer, aerr; 536 if (!qp) 537 return 0; 538 539 hcp_epas_dtor(&qp->epas); 540 541 hret = ehea_destroy_qp_res(qp, NORMAL_FREE); 542 if (hret == H_R_STATE) { 543 ehea_error_data(qp->adapter, qp->fw_handle, &aer, &aerr); 544 hret = ehea_destroy_qp_res(qp, FORCE_FREE); 545 } 546 547 if (hret != H_SUCCESS) { 548 pr_err("destroy QP failed\n"); 549 return -EIO; 550 } 551 552 return 0; 553} 554 555static inline int ehea_calc_index(unsigned long i, unsigned long s) 556{ 557 return (i >> s) & EHEA_INDEX_MASK; 558} 559 560static inline int ehea_init_top_bmap(struct ehea_top_bmap *ehea_top_bmap, 561 int dir) 562{ 563 if (!ehea_top_bmap->dir[dir]) { 564 ehea_top_bmap->dir[dir] = 565 kzalloc(sizeof(struct ehea_dir_bmap), GFP_KERNEL); 566 if (!ehea_top_bmap->dir[dir]) 567 return -ENOMEM; 568 } 569 return 0; 570} 571 572static inline int ehea_init_bmap(struct ehea_bmap *ehea_bmap, int top, int dir) 573{ 574 if (!ehea_bmap->top[top]) { 575 ehea_bmap->top[top] = 576 kzalloc(sizeof(struct ehea_top_bmap), GFP_KERNEL); 577 if (!ehea_bmap->top[top]) 578 return -ENOMEM; 579 } 580 return ehea_init_top_bmap(ehea_bmap->top[top], dir); 581} 582 583static DEFINE_MUTEX(ehea_busmap_mutex); 584static unsigned long ehea_mr_len; 585 586#define EHEA_BUSMAP_ADD_SECT 1 587#define EHEA_BUSMAP_REM_SECT 0 588 589static void ehea_rebuild_busmap(void) 590{ 591 u64 vaddr = EHEA_BUSMAP_START; 592 int top, dir, idx; 593 594 for (top = 0; top < EHEA_MAP_ENTRIES; top++) { 595 struct ehea_top_bmap *ehea_top; 596 int valid_dir_entries = 0; 597 598 if (!ehea_bmap->top[top]) 599 continue; 600 ehea_top = ehea_bmap->top[top]; 601 for (dir = 0; dir < EHEA_MAP_ENTRIES; dir++) { 602 struct ehea_dir_bmap *ehea_dir; 603 int valid_entries = 0; 604 605 if (!ehea_top->dir[dir]) 606 continue; 607 valid_dir_entries++; 608 ehea_dir = ehea_top->dir[dir]; 609 for (idx = 0; idx < EHEA_MAP_ENTRIES; idx++) { 610 if (!ehea_dir->ent[idx]) 611 continue; 612 valid_entries++; 613 ehea_dir->ent[idx] = vaddr; 614 vaddr += EHEA_SECTSIZE; 615 } 616 if (!valid_entries) { 617 ehea_top->dir[dir] = NULL; 618 kfree(ehea_dir); 619 } 620 } 621 if (!valid_dir_entries) { 622 ehea_bmap->top[top] = NULL; 623 kfree(ehea_top); 624 } 625 } 626} 627 628static int ehea_update_busmap(unsigned long pfn, unsigned long nr_pages, int add) 629{ 630 unsigned long i, start_section, end_section; 631 632 if (!nr_pages) 633 return 0; 634 635 if (!ehea_bmap) { 636 ehea_bmap = kzalloc(sizeof(struct ehea_bmap), GFP_KERNEL); 637 if (!ehea_bmap) 638 return -ENOMEM; 639 } 640 641 start_section = (pfn * PAGE_SIZE) / EHEA_SECTSIZE; 642 end_section = start_section + ((nr_pages * PAGE_SIZE) / EHEA_SECTSIZE); 643 /* Mark entries as valid or invalid only; address is assigned later */ 644 for (i = start_section; i < end_section; i++) { 645 u64 flag; 646 int top = ehea_calc_index(i, EHEA_TOP_INDEX_SHIFT); 647 int dir = ehea_calc_index(i, EHEA_DIR_INDEX_SHIFT); 648 int idx = i & EHEA_INDEX_MASK; 649 650 if (add) { 651 int ret = ehea_init_bmap(ehea_bmap, top, dir); 652 if (ret) 653 return ret; 654 flag = 1; /* valid */ 655 ehea_mr_len += EHEA_SECTSIZE; 656 } else { 657 if (!ehea_bmap->top[top]) 658 continue; 659 if (!ehea_bmap->top[top]->dir[dir]) 660 continue; 661 flag = 0; /* invalid */ 662 ehea_mr_len -= EHEA_SECTSIZE; 663 } 664 665 ehea_bmap->top[top]->dir[dir]->ent[idx] = flag; 666 } 667 ehea_rebuild_busmap(); /* Assign contiguous addresses for mr */ 668 return 0; 669} 670 671int ehea_add_sect_bmap(unsigned long pfn, unsigned long nr_pages) 672{ 673 int ret; 674 675 mutex_lock(&ehea_busmap_mutex); 676 ret = ehea_update_busmap(pfn, nr_pages, EHEA_BUSMAP_ADD_SECT); 677 mutex_unlock(&ehea_busmap_mutex); 678 return ret; 679} 680 681int ehea_rem_sect_bmap(unsigned long pfn, unsigned long nr_pages) 682{ 683 int ret; 684 685 mutex_lock(&ehea_busmap_mutex); 686 ret = ehea_update_busmap(pfn, nr_pages, EHEA_BUSMAP_REM_SECT); 687 mutex_unlock(&ehea_busmap_mutex); 688 return ret; 689} 690 691static int ehea_is_hugepage(unsigned long pfn) 692{ 693 int page_order; 694 695 if (pfn & EHEA_HUGEPAGE_PFN_MASK) 696 return 0; 697 698 page_order = compound_order(pfn_to_page(pfn)); 699 if (page_order + PAGE_SHIFT != EHEA_HUGEPAGESHIFT) 700 return 0; 701 702 return 1; 703} 704 705static int ehea_create_busmap_callback(unsigned long initial_pfn, 706 unsigned long total_nr_pages, void *arg) 707{ 708 int ret; 709 unsigned long pfn, start_pfn, end_pfn, nr_pages; 710 711 if ((total_nr_pages * PAGE_SIZE) < EHEA_HUGEPAGE_SIZE) 712 return ehea_update_busmap(initial_pfn, total_nr_pages, 713 EHEA_BUSMAP_ADD_SECT); 714 715 /* Given chunk is >= 16GB -> check for hugepages */ 716 start_pfn = initial_pfn; 717 end_pfn = initial_pfn + total_nr_pages; 718 pfn = start_pfn; 719 720 while (pfn < end_pfn) { 721 if (ehea_is_hugepage(pfn)) { 722 /* Add mem found in front of the hugepage */ 723 nr_pages = pfn - start_pfn; 724 ret = ehea_update_busmap(start_pfn, nr_pages, 725 EHEA_BUSMAP_ADD_SECT); 726 if (ret) 727 return ret; 728 729 /* Skip the hugepage */ 730 pfn += (EHEA_HUGEPAGE_SIZE / PAGE_SIZE); 731 start_pfn = pfn; 732 } else 733 pfn += (EHEA_SECTSIZE / PAGE_SIZE); 734 } 735 736 /* Add mem found behind the hugepage(s) */ 737 nr_pages = pfn - start_pfn; 738 return ehea_update_busmap(start_pfn, nr_pages, EHEA_BUSMAP_ADD_SECT); 739} 740 741int ehea_create_busmap(void) 742{ 743 int ret; 744 745 mutex_lock(&ehea_busmap_mutex); 746 ehea_mr_len = 0; 747 ret = walk_system_ram_range(0, 1ULL << MAX_PHYSMEM_BITS, NULL, 748 ehea_create_busmap_callback); 749 mutex_unlock(&ehea_busmap_mutex); 750 return ret; 751} 752 753void ehea_destroy_busmap(void) 754{ 755 int top, dir; 756 mutex_lock(&ehea_busmap_mutex); 757 if (!ehea_bmap) 758 goto out_destroy; 759 760 for (top = 0; top < EHEA_MAP_ENTRIES; top++) { 761 if (!ehea_bmap->top[top]) 762 continue; 763 764 for (dir = 0; dir < EHEA_MAP_ENTRIES; dir++) { 765 if (!ehea_bmap->top[top]->dir[dir]) 766 continue; 767 768 kfree(ehea_bmap->top[top]->dir[dir]); 769 } 770 771 kfree(ehea_bmap->top[top]); 772 } 773 774 kfree(ehea_bmap); 775 ehea_bmap = NULL; 776out_destroy: 777 mutex_unlock(&ehea_busmap_mutex); 778} 779 780u64 ehea_map_vaddr(void *caddr) 781{ 782 int top, dir, idx; 783 unsigned long index, offset; 784 785 if (!ehea_bmap) 786 return EHEA_INVAL_ADDR; 787 788 index = __pa(caddr) >> SECTION_SIZE_BITS; 789 top = (index >> EHEA_TOP_INDEX_SHIFT) & EHEA_INDEX_MASK; 790 if (!ehea_bmap->top[top]) 791 return EHEA_INVAL_ADDR; 792 793 dir = (index >> EHEA_DIR_INDEX_SHIFT) & EHEA_INDEX_MASK; 794 if (!ehea_bmap->top[top]->dir[dir]) 795 return EHEA_INVAL_ADDR; 796 797 idx = index & EHEA_INDEX_MASK; 798 if (!ehea_bmap->top[top]->dir[dir]->ent[idx]) 799 return EHEA_INVAL_ADDR; 800 801 offset = (unsigned long)caddr & (EHEA_SECTSIZE - 1); 802 return ehea_bmap->top[top]->dir[dir]->ent[idx] | offset; 803} 804 805static inline void *ehea_calc_sectbase(int top, int dir, int idx) 806{ 807 unsigned long ret = idx; 808 ret |= dir << EHEA_DIR_INDEX_SHIFT; 809 ret |= top << EHEA_TOP_INDEX_SHIFT; 810 return __va(ret << SECTION_SIZE_BITS); 811} 812 813static u64 ehea_reg_mr_section(int top, int dir, int idx, u64 *pt, 814 struct ehea_adapter *adapter, 815 struct ehea_mr *mr) 816{ 817 void *pg; 818 u64 j, m, hret; 819 unsigned long k = 0; 820 u64 pt_abs = __pa(pt); 821 822 void *sectbase = ehea_calc_sectbase(top, dir, idx); 823 824 for (j = 0; j < (EHEA_PAGES_PER_SECTION / EHEA_MAX_RPAGE); j++) { 825 826 for (m = 0; m < EHEA_MAX_RPAGE; m++) { 827 pg = sectbase + ((k++) * EHEA_PAGESIZE); 828 pt[m] = __pa(pg); 829 } 830 hret = ehea_h_register_rpage_mr(adapter->handle, mr->handle, 0, 831 0, pt_abs, EHEA_MAX_RPAGE); 832 833 if ((hret != H_SUCCESS) && 834 (hret != H_PAGE_REGISTERED)) { 835 ehea_h_free_resource(adapter->handle, mr->handle, 836 FORCE_FREE); 837 pr_err("register_rpage_mr failed\n"); 838 return hret; 839 } 840 } 841 return hret; 842} 843 844static u64 ehea_reg_mr_sections(int top, int dir, u64 *pt, 845 struct ehea_adapter *adapter, 846 struct ehea_mr *mr) 847{ 848 u64 hret = H_SUCCESS; 849 int idx; 850 851 for (idx = 0; idx < EHEA_MAP_ENTRIES; idx++) { 852 if (!ehea_bmap->top[top]->dir[dir]->ent[idx]) 853 continue; 854 855 hret = ehea_reg_mr_section(top, dir, idx, pt, adapter, mr); 856 if ((hret != H_SUCCESS) && (hret != H_PAGE_REGISTERED)) 857 return hret; 858 } 859 return hret; 860} 861 862static u64 ehea_reg_mr_dir_sections(int top, u64 *pt, 863 struct ehea_adapter *adapter, 864 struct ehea_mr *mr) 865{ 866 u64 hret = H_SUCCESS; 867 int dir; 868 869 for (dir = 0; dir < EHEA_MAP_ENTRIES; dir++) { 870 if (!ehea_bmap->top[top]->dir[dir]) 871 continue; 872 873 hret = ehea_reg_mr_sections(top, dir, pt, adapter, mr); 874 if ((hret != H_SUCCESS) && (hret != H_PAGE_REGISTERED)) 875 return hret; 876 } 877 return hret; 878} 879 880int ehea_reg_kernel_mr(struct ehea_adapter *adapter, struct ehea_mr *mr) 881{ 882 int ret; 883 u64 *pt; 884 u64 hret; 885 u32 acc_ctrl = EHEA_MR_ACC_CTRL; 886 887 unsigned long top; 888 889 pt = (void *)get_zeroed_page(GFP_KERNEL); 890 if (!pt) { 891 pr_err("no mem\n"); 892 ret = -ENOMEM; 893 goto out; 894 } 895 896 hret = ehea_h_alloc_resource_mr(adapter->handle, EHEA_BUSMAP_START, 897 ehea_mr_len, acc_ctrl, adapter->pd, 898 &mr->handle, &mr->lkey); 899 900 if (hret != H_SUCCESS) { 901 pr_err("alloc_resource_mr failed\n"); 902 ret = -EIO; 903 goto out; 904 } 905 906 if (!ehea_bmap) { 907 ehea_h_free_resource(adapter->handle, mr->handle, FORCE_FREE); 908 pr_err("no busmap available\n"); 909 ret = -EIO; 910 goto out; 911 } 912 913 for (top = 0; top < EHEA_MAP_ENTRIES; top++) { 914 if (!ehea_bmap->top[top]) 915 continue; 916 917 hret = ehea_reg_mr_dir_sections(top, pt, adapter, mr); 918 if((hret != H_PAGE_REGISTERED) && (hret != H_SUCCESS)) 919 break; 920 } 921 922 if (hret != H_SUCCESS) { 923 ehea_h_free_resource(adapter->handle, mr->handle, FORCE_FREE); 924 pr_err("registering mr failed\n"); 925 ret = -EIO; 926 goto out; 927 } 928 929 mr->vaddr = EHEA_BUSMAP_START; 930 mr->adapter = adapter; 931 ret = 0; 932out: 933 free_page((unsigned long)pt); 934 return ret; 935} 936 937int ehea_rem_mr(struct ehea_mr *mr) 938{ 939 u64 hret; 940 941 if (!mr || !mr->adapter) 942 return -EINVAL; 943 944 hret = ehea_h_free_resource(mr->adapter->handle, mr->handle, 945 FORCE_FREE); 946 if (hret != H_SUCCESS) { 947 pr_err("destroy MR failed\n"); 948 return -EIO; 949 } 950 951 return 0; 952} 953 954int ehea_gen_smr(struct ehea_adapter *adapter, struct ehea_mr *old_mr, 955 struct ehea_mr *shared_mr) 956{ 957 u64 hret; 958 959 hret = ehea_h_register_smr(adapter->handle, old_mr->handle, 960 old_mr->vaddr, EHEA_MR_ACC_CTRL, 961 adapter->pd, shared_mr); 962 if (hret != H_SUCCESS) 963 return -EIO; 964 965 shared_mr->adapter = adapter; 966 967 return 0; 968} 969 970static void print_error_data(u64 *data) 971{ 972 int length; 973 u64 type = EHEA_BMASK_GET(ERROR_DATA_TYPE, data[2]); 974 u64 resource = data[1]; 975 976 length = EHEA_BMASK_GET(ERROR_DATA_LENGTH, data[0]); 977 978 if (length > EHEA_PAGESIZE) 979 length = EHEA_PAGESIZE; 980 981 if (type == EHEA_AER_RESTYPE_QP) 982 pr_err("QP (resource=%llX) state: AER=0x%llX, AERR=0x%llX, port=%llX\n", 983 resource, data[6], data[12], data[22]); 984 else if (type == EHEA_AER_RESTYPE_CQ) 985 pr_err("CQ (resource=%llX) state: AER=0x%llX\n", 986 resource, data[6]); 987 else if (type == EHEA_AER_RESTYPE_EQ) 988 pr_err("EQ (resource=%llX) state: AER=0x%llX\n", 989 resource, data[6]); 990 991 ehea_dump(data, length, "error data"); 992} 993 994u64 ehea_error_data(struct ehea_adapter *adapter, u64 res_handle, 995 u64 *aer, u64 *aerr) 996{ 997 unsigned long ret; 998 u64 *rblock; 999 u64 type = 0; 1000 1001 rblock = (void *)get_zeroed_page(GFP_KERNEL); 1002 if (!rblock) { 1003 pr_err("Cannot allocate rblock memory\n"); 1004 goto out; 1005 } 1006 1007 ret = ehea_h_error_data(adapter->handle, res_handle, rblock); 1008 1009 if (ret == H_SUCCESS) { 1010 type = EHEA_BMASK_GET(ERROR_DATA_TYPE, rblock[2]); 1011 *aer = rblock[6]; 1012 *aerr = rblock[12]; 1013 print_error_data(rblock); 1014 } else if (ret == H_R_STATE) { 1015 pr_err("No error data available: %llX\n", res_handle); 1016 } else 1017 pr_err("Error data could not be fetched: %llX\n", res_handle); 1018 1019 free_page((unsigned long)rblock); 1020out: 1021 return type; 1022} 1023