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