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