drivers/net/ehea/ehea_qmr.c

   1 /*
   2  *  linux/drivers/net/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 #include <linux/mm.h>
  30 #include "ehea.h"
  31 #include "ehea_phyp.h"
  32 #include "ehea_qmr.h"
  33
  34
  35 struct ehea_busmap ehea_bmap = { 0, 0, NULL };
  36 extern u64 ehea_driver_flags;
  37 extern struct workqueue_struct *ehea_driver_wq;
  38 extern struct work_struct ehea_rereg_mr_task;
  39
  40
  41 static void *hw_qpageit_get_inc(struct hw_queue *queue)
  42 {
  43         void *retvalue = hw_qeit_get(queue);
  44
  45         queue->current_q_offset += queue->pagesize;
  46         if (queue->current_q_offset > queue->queue_length) {
  47                 queue->current_q_offset -= queue->pagesize;
  48                 retvalue = NULL;
  49         } else if (((u64) retvalue) & (EHEA_PAGESIZE-1)) {
  50                 ehea_error("not on pageboundary");
  51                 retvalue = NULL;
  52         }
  53         return retvalue;
  54 }
  55
  56 static int hw_queue_ctor(struct hw_queue *queue, const u32 nr_of_pages,
  57                           const u32 pagesize, const u32 qe_size)
  58 {
  59         int pages_per_kpage = PAGE_SIZE / pagesize;
  60         int i, k;
  61
  62         if ((pagesize > PAGE_SIZE) || (!pages_per_kpage)) {
  63                 ehea_error("pagesize conflict! kernel pagesize=%d, "
  64                            "ehea pagesize=%d", (int)PAGE_SIZE, (int)pagesize);
  65                 return -EINVAL;
  66         }
  67
  68         queue->queue_length = nr_of_pages * pagesize;
  69         queue->queue_pages = kmalloc(nr_of_pages * sizeof(void*), GFP_KERNEL);
  70         if (!queue->queue_pages) {
  71                 ehea_error("no mem for queue_pages");
  72                 return -ENOMEM;
  73         }
  74
  75         /*
  76          * allocate pages for queue:
  77          * outer loop allocates whole kernel pages (page aligned) and
  78          * inner loop divides a kernel page into smaller hea queue pages
  79          */
  80         i = 0;
  81         while (i < nr_of_pages) {
  82                 u8 *kpage = (u8*)get_zeroed_page(GFP_KERNEL);
  83                 if (!kpage)
  84                         goto out_nomem;
  85                 for (k = 0; k < pages_per_kpage && i < nr_of_pages; k++) {
  86                         (queue->queue_pages)[i] = (struct ehea_page*)kpage;
  87                         kpage += pagesize;
  88                         i++;
  89                 }
  90         }
  91
  92         queue->current_q_offset = 0;
  93         queue->qe_size = qe_size;
  94         queue->pagesize = pagesize;
  95         queue->toggle_state = 1;
  96
  97         return 0;
  98 out_nomem:
  99         for (i = 0; i < nr_of_pages; i += pages_per_kpage) {
 100                 if (!(queue->queue_pages)[i])
 101                         break;
 102                 free_page((unsigned long)(queue->queue_pages)[i]);
 103         }
 104         return -ENOMEM;
 105 }
 106
 107 static void hw_queue_dtor(struct hw_queue *queue)
 108 {
 109         int pages_per_kpage = PAGE_SIZE / queue->pagesize;
 110         int i, nr_pages;
 111
 112         if (!queue || !queue->queue_pages)
 113                 return;
 114
 115         nr_pages = queue->queue_length / queue->pagesize;
 116
 117         for (i = 0; i < nr_pages; i += pages_per_kpage)
 118                 free_page((unsigned long)(queue->queue_pages)[i]);
 119
 120         kfree(queue->queue_pages);
 121 }
 122
 123 struct ehea_cq *ehea_create_cq(struct ehea_adapter *adapter,
 124                                int nr_of_cqe, u64 eq_handle, u32 cq_token)
 125 {
 126         struct ehea_cq *cq;
 127         struct h_epa epa;
 128         u64 *cq_handle_ref, hret, rpage;
 129         u32 act_nr_of_entries, act_pages, counter;
 130         int ret;
 131         void *vpage;
 132
 133         cq = kzalloc(sizeof(*cq), GFP_KERNEL);
 134         if (!cq) {
 135                 ehea_error("no mem for cq");
 136                 goto out_nomem;
 137         }
 138
 139         cq->attr.max_nr_of_cqes = nr_of_cqe;
 140         cq->attr.cq_token = cq_token;
 141         cq->attr.eq_handle = eq_handle;
 142
 143         cq->adapter = adapter;
 144
 145         cq_handle_ref = &cq->fw_handle;
 146         act_nr_of_entries = 0;
 147         act_pages = 0;
 148
 149         hret = ehea_h_alloc_resource_cq(adapter->handle, &cq->attr,
 150                                         &cq->fw_handle, &cq->epas);
 151         if (hret != H_SUCCESS) {
 152                 ehea_error("alloc_resource_cq failed");
 153                 goto out_freemem;
 154         }
 155
 156         ret = hw_queue_ctor(&cq->hw_queue, cq->attr.nr_pages,
 157                             EHEA_PAGESIZE, sizeof(struct ehea_cqe));
 158         if (ret)
 159                 goto out_freeres;
 160
 161         for (counter = 0; counter < cq->attr.nr_pages; counter++) {
 162                 vpage = hw_qpageit_get_inc(&cq->hw_queue);
 163                 if (!vpage) {
 164                         ehea_error("hw_qpageit_get_inc failed");
 165                         goto out_kill_hwq;
 166                 }
 167
 168                 rpage = virt_to_abs(vpage);
 169                 hret = ehea_h_register_rpage(adapter->handle,
 170                                              0, EHEA_CQ_REGISTER_ORIG,
 171                                              cq->fw_handle, rpage, 1);
 172                 if (hret < H_SUCCESS) {
 173                         ehea_error("register_rpage_cq failed ehea_cq=%p "
 174                                    "hret=%lx counter=%i act_pages=%i",
 175                                    cq, hret, counter, cq->attr.nr_pages);
 176                         goto out_kill_hwq;
 177                 }
 178
 179                 if (counter == (cq->attr.nr_pages - 1)) {
 180                         vpage = hw_qpageit_get_inc(&cq->hw_queue);
 181
 182                         if ((hret != H_SUCCESS) || (vpage)) {
 183                                 ehea_error("registration of pages not "
 184                                            "complete hret=%lx\n", hret);
 185                                 goto out_kill_hwq;
 186                         }
 187                 } else {
 188                         if ((hret != H_PAGE_REGISTERED) || (!vpage)) {
 189                                 ehea_error("CQ: registration of page failed "
 190                                            "hret=%lx\n", hret);
 191                                 goto out_kill_hwq;
 192                         }
 193                 }
 194         }
 195
 196         hw_qeit_reset(&cq->hw_queue);
 197         epa = cq->epas.kernel;
 198         ehea_reset_cq_ep(cq);
 199         ehea_reset_cq_n1(cq);
 200
 201         return cq;
 202
 203 out_kill_hwq:
 204         hw_queue_dtor(&cq->hw_queue);
 205
 206 out_freeres:
 207         ehea_h_free_resource(adapter->handle, cq->fw_handle, FORCE_FREE);
 208
 209 out_freemem:
 210         kfree(cq);
 211
 212 out_nomem:
 213         return NULL;
 214 }
 215
 216 u64 ehea_destroy_cq_res(struct ehea_cq *cq, u64 force)
 217 {
 218         u64 hret;
 219         u64 adapter_handle = cq->adapter->handle;
 220
 221         /* deregister all previous registered pages */
 222         hret = ehea_h_free_resource(adapter_handle, cq->fw_handle, force);
 223         if (hret != H_SUCCESS)
 224                 return hret;
 225
 226         hw_queue_dtor(&cq->hw_queue);
 227         kfree(cq);
 228
 229         return hret;
 230 }
 231
 232 int ehea_destroy_cq(struct ehea_cq *cq)
 233 {
 234         u64 hret;
 235         if (!cq)
 236                 return 0;
 237
 238         if ((hret = ehea_destroy_cq_res(cq, NORMAL_FREE)) == H_R_STATE) {
 239                 ehea_error_data(cq->adapter, cq->fw_handle);
 240                 hret = ehea_destroy_cq_res(cq, FORCE_FREE);
 241         }
 242
 243         if (hret != H_SUCCESS) {
 244                 ehea_error("destroy CQ failed");
 245                 return -EIO;
 246         }
 247
 248         return 0;
 249 }
 250
 251 struct ehea_eq *ehea_create_eq(struct ehea_adapter *adapter,
 252                                const enum ehea_eq_type type,
 253                                const u32 max_nr_of_eqes, const u8 eqe_gen)
 254 {
 255         int ret, i;
 256         u64 hret, rpage;
 257         void *vpage;
 258         struct ehea_eq *eq;
 259
 260         eq = kzalloc(sizeof(*eq), GFP_KERNEL);
 261         if (!eq) {
 262                 ehea_error("no mem for eq");
 263                 return NULL;
 264         }
 265
 266         eq->adapter = adapter;
 267         eq->attr.type = type;
 268         eq->attr.max_nr_of_eqes = max_nr_of_eqes;
 269         eq->attr.eqe_gen = eqe_gen;
 270         spin_lock_init(&eq->spinlock);
 271
 272         hret = ehea_h_alloc_resource_eq(adapter->handle,
 273                                         &eq->attr, &eq->fw_handle);
 274         if (hret != H_SUCCESS) {
 275                 ehea_error("alloc_resource_eq failed");
 276                 goto out_freemem;
 277         }
 278
 279         ret = hw_queue_ctor(&eq->hw_queue, eq->attr.nr_pages,
 280                             EHEA_PAGESIZE, sizeof(struct ehea_eqe));
 281         if (ret) {
 282                 ehea_error("can't allocate eq pages");
 283                 goto out_freeres;
 284         }
 285
 286         for (i = 0; i < eq->attr.nr_pages; i++) {
 287                 vpage = hw_qpageit_get_inc(&eq->hw_queue);
 288                 if (!vpage) {
 289                         ehea_error("hw_qpageit_get_inc failed");
 290                         hret = H_RESOURCE;
 291                         goto out_kill_hwq;
 292                 }
 293
 294                 rpage = virt_to_abs(vpage);
 295
 296                 hret = ehea_h_register_rpage(adapter->handle, 0,
 297                                              EHEA_EQ_REGISTER_ORIG,
 298                                              eq->fw_handle, rpage, 1);
 299
 300                 if (i == (eq->attr.nr_pages - 1)) {
 301                         /* last page */
 302                         vpage = hw_qpageit_get_inc(&eq->hw_queue);
 303                         if ((hret != H_SUCCESS) || (vpage)) {
 304                                 goto out_kill_hwq;
 305                         }
 306                 } else {
 307                         if ((hret != H_PAGE_REGISTERED) || (!vpage)) {
 308                                 goto out_kill_hwq;
 309                         }
 310                 }
 311         }
 312
 313         hw_qeit_reset(&eq->hw_queue);
 314         return eq;
 315
 316 out_kill_hwq:
 317         hw_queue_dtor(&eq->hw_queue);
 318
 319 out_freeres:
 320         ehea_h_free_resource(adapter->handle, eq->fw_handle, FORCE_FREE);
 321
 322 out_freemem:
 323         kfree(eq);
 324         return NULL;
 325 }
 326
 327 struct ehea_eqe *ehea_poll_eq(struct ehea_eq *eq)
 328 {
 329         struct ehea_eqe *eqe;
 330         unsigned long flags;
 331
 332         spin_lock_irqsave(&eq->spinlock, flags);
 333         eqe = (struct ehea_eqe*)hw_eqit_eq_get_inc_valid(&eq->hw_queue);
 334         spin_unlock_irqrestore(&eq->spinlock, flags);
 335
 336         return eqe;
 337 }
 338
 339 u64 ehea_destroy_eq_res(struct ehea_eq *eq, u64 force)
 340 {
 341         u64 hret;
 342         unsigned long flags;
 343
 344         spin_lock_irqsave(&eq->spinlock, flags);
 345
 346         hret = ehea_h_free_resource(eq->adapter->handle, eq->fw_handle, force);
 347         spin_unlock_irqrestore(&eq->spinlock, flags);
 348
 349         if (hret != H_SUCCESS)
 350                 return hret;
 351
 352         hw_queue_dtor(&eq->hw_queue);
 353         kfree(eq);
 354
 355         return hret;
 356 }
 357
 358 int ehea_destroy_eq(struct ehea_eq *eq)
 359 {
 360         u64 hret;
 361         if (!eq)
 362                 return 0;
 363
 364         if ((hret = ehea_destroy_eq_res(eq, NORMAL_FREE)) == H_R_STATE) {
 365                 ehea_error_data(eq->adapter, eq->fw_handle);
 366                 hret = ehea_destroy_eq_res(eq, FORCE_FREE);
 367         }
 368
 369         if (hret != H_SUCCESS) {
 370                 ehea_error("destroy EQ failed");
 371                 return -EIO;
 372         }
 373
 374         return 0;
 375 }
 376
 377 /**
 378  * allocates memory for a queue and registers pages in phyp
 379  */
 380 int ehea_qp_alloc_register(struct ehea_qp *qp, struct hw_queue *hw_queue,
 381                            int nr_pages, int wqe_size, int act_nr_sges,
 382                            struct ehea_adapter *adapter, int h_call_q_selector)
 383 {
 384         u64 hret, rpage;
 385         int ret, cnt;
 386         void *vpage;
 387
 388         ret = hw_queue_ctor(hw_queue, nr_pages, EHEA_PAGESIZE, wqe_size);
 389         if (ret)
 390                 return ret;
 391
 392         for (cnt = 0; cnt < nr_pages; cnt++) {
 393                 vpage = hw_qpageit_get_inc(hw_queue);
 394                 if (!vpage) {
 395                         ehea_error("hw_qpageit_get_inc failed");
 396                         goto out_kill_hwq;
 397                 }
 398                 rpage = virt_to_abs(vpage);
 399                 hret = ehea_h_register_rpage(adapter->handle,
 400                                              0, h_call_q_selector,
 401                                              qp->fw_handle, rpage, 1);
 402                 if (hret < H_SUCCESS) {
 403                         ehea_error("register_rpage_qp failed");
 404                         goto out_kill_hwq;
 405                 }
 406         }
 407         hw_qeit_reset(hw_queue);
 408         return 0;
 409
 410 out_kill_hwq:
 411         hw_queue_dtor(hw_queue);
 412         return -EIO;
 413 }
 414
 415 static inline u32 map_wqe_size(u8 wqe_enc_size)
 416 {
 417         return 128 << wqe_enc_size;
 418 }
 419
 420 struct ehea_qp *ehea_create_qp(struct ehea_adapter *adapter,
 421                                u32 pd, struct ehea_qp_init_attr *init_attr)
 422 {
 423         int ret;
 424         u64 hret;
 425         struct ehea_qp *qp;
 426         u32 wqe_size_in_bytes_sq, wqe_size_in_bytes_rq1;
 427         u32 wqe_size_in_bytes_rq2, wqe_size_in_bytes_rq3;
 428
 429
 430         qp = kzalloc(sizeof(*qp), GFP_KERNEL);
 431         if (!qp) {
 432                 ehea_error("no mem for qp");
 433                 return NULL;
 434         }
 435
 436         qp->adapter = adapter;
 437
 438         hret = ehea_h_alloc_resource_qp(adapter->handle, init_attr, pd,
 439                                         &qp->fw_handle, &qp->epas);
 440         if (hret != H_SUCCESS) {
 441                 ehea_error("ehea_h_alloc_resource_qp failed");
 442                 goto out_freemem;
 443         }
 444
 445         wqe_size_in_bytes_sq = map_wqe_size(init_attr->act_wqe_size_enc_sq);
 446         wqe_size_in_bytes_rq1 = map_wqe_size(init_attr->act_wqe_size_enc_rq1);
 447         wqe_size_in_bytes_rq2 = map_wqe_size(init_attr->act_wqe_size_enc_rq2);
 448         wqe_size_in_bytes_rq3 = map_wqe_size(init_attr->act_wqe_size_enc_rq3);
 449
 450         ret = ehea_qp_alloc_register(qp, &qp->hw_squeue, init_attr->nr_sq_pages,
 451                                      wqe_size_in_bytes_sq,
 452                                      init_attr->act_wqe_size_enc_sq, adapter,
 453                                      0);
 454         if (ret) {
 455                 ehea_error("can't register for sq ret=%x", ret);
 456                 goto out_freeres;
 457         }
 458
 459         ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue1,
 460                                      init_attr->nr_rq1_pages,
 461                                      wqe_size_in_bytes_rq1,
 462                                      init_attr->act_wqe_size_enc_rq1,
 463                                      adapter, 1);
 464         if (ret) {
 465                 ehea_error("can't register for rq1 ret=%x", ret);
 466                 goto out_kill_hwsq;
 467         }
 468
 469         if (init_attr->rq_count > 1) {
 470                 ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue2,
 471                                              init_attr->nr_rq2_pages,
 472                                              wqe_size_in_bytes_rq2,
 473                                              init_attr->act_wqe_size_enc_rq2,
 474                                              adapter, 2);
 475                 if (ret) {
 476                         ehea_error("can't register for rq2 ret=%x", ret);
 477                         goto out_kill_hwr1q;
 478                 }
 479         }
 480
 481         if (init_attr->rq_count > 2) {
 482                 ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue3,
 483                                              init_attr->nr_rq3_pages,
 484                                              wqe_size_in_bytes_rq3,
 485                                              init_attr->act_wqe_size_enc_rq3,
 486                                              adapter, 3);
 487                 if (ret) {
 488                         ehea_error("can't register for rq3 ret=%x", ret);
 489                         goto out_kill_hwr2q;
 490                 }
 491         }
 492
 493         qp->init_attr = *init_attr;
 494
 495         return qp;
 496
 497 out_kill_hwr2q:
 498         hw_queue_dtor(&qp->hw_rqueue2);
 499
 500 out_kill_hwr1q:
 501         hw_queue_dtor(&qp->hw_rqueue1);
 502
 503 out_kill_hwsq:
 504         hw_queue_dtor(&qp->hw_squeue);
 505
 506 out_freeres:
 507         ehea_h_disable_and_get_hea(adapter->handle, qp->fw_handle);
 508         ehea_h_free_resource(adapter->handle, qp->fw_handle, FORCE_FREE);
 509
 510 out_freemem:
 511         kfree(qp);
 512         return NULL;
 513 }
 514
 515 u64 ehea_destroy_qp_res(struct ehea_qp *qp, u64 force)
 516 {
 517         u64 hret;
 518         struct ehea_qp_init_attr *qp_attr = &qp->init_attr;
 519
 520
 521         ehea_h_disable_and_get_hea(qp->adapter->handle, qp->fw_handle);
 522         hret = ehea_h_free_resource(qp->adapter->handle, qp->fw_handle, force);
 523         if (hret != H_SUCCESS)
 524                 return hret;
 525
 526         hw_queue_dtor(&qp->hw_squeue);
 527         hw_queue_dtor(&qp->hw_rqueue1);
 528
 529         if (qp_attr->rq_count > 1)
 530                 hw_queue_dtor(&qp->hw_rqueue2);
 531         if (qp_attr->rq_count > 2)
 532                 hw_queue_dtor(&qp->hw_rqueue3);
 533         kfree(qp);
 534
 535         return hret;
 536 }
 537
 538 int ehea_destroy_qp(struct ehea_qp *qp)
 539 {
 540         u64 hret;
 541         if (!qp)
 542                 return 0;
 543
 544         if ((hret = ehea_destroy_qp_res(qp, NORMAL_FREE)) == H_R_STATE) {
 545                 ehea_error_data(qp->adapter, qp->fw_handle);
 546                 hret = ehea_destroy_qp_res(qp, FORCE_FREE);
 547         }
 548
 549         if (hret != H_SUCCESS) {
 550                 ehea_error("destroy QP failed");
 551                 return -EIO;
 552         }
 553
 554         return 0;
 555 }
 556
 557 int ehea_create_busmap( void )
 558 {
 559         u64 vaddr = EHEA_BUSMAP_START;
 560         unsigned long abs_max_pfn = 0;
 561         unsigned long sec_max_pfn;
 562         int i;
 563
 564         /*
 565          * Sections are not in ascending order -> Loop over all sections and
 566          * find the highest PFN to compute the required map size.
 567         */
 568         ehea_bmap.valid_sections = 0;
 569
 570         for (i = 0; i < NR_MEM_SECTIONS; i++)
 571                 if (valid_section_nr(i)) {
 572                         sec_max_pfn = section_nr_to_pfn(i);
 573                         if (sec_max_pfn > abs_max_pfn)
 574                                 abs_max_pfn = sec_max_pfn;
 575                         ehea_bmap.valid_sections++;
 576                 }
 577
 578         ehea_bmap.entries = abs_max_pfn / EHEA_PAGES_PER_SECTION + 1;
 579         ehea_bmap.vaddr = vmalloc(ehea_bmap.entries * sizeof(*ehea_bmap.vaddr));
 580
 581         if (!ehea_bmap.vaddr)
 582                 return -ENOMEM;
 583
 584         for (i = 0 ; i < ehea_bmap.entries; i++) {
 585                 unsigned long pfn = section_nr_to_pfn(i);
 586
 587                 if (pfn_valid(pfn)) {
 588                         ehea_bmap.vaddr[i] = vaddr;
 589                         vaddr += EHEA_SECTSIZE;
 590                 } else
 591                         ehea_bmap.vaddr[i] = 0;
 592         }
 593
 594         return 0;
 595 }
 596
 597 void ehea_destroy_busmap( void )
 598 {
 599         vfree(ehea_bmap.vaddr);
 600 }
 601
 602 u64 ehea_map_vaddr(void *caddr)
 603 {
 604         u64 mapped_addr;
 605         unsigned long index = __pa(caddr) >> SECTION_SIZE_BITS;
 606
 607         if (likely(index < ehea_bmap.entries)) {
 608                 mapped_addr = ehea_bmap.vaddr[index];
 609                 if (likely(mapped_addr))
 610                         mapped_addr |= (((unsigned long)caddr)
 611                                         & (EHEA_SECTSIZE - 1));
 612                 else
 613                         mapped_addr = -1;
 614         } else
 615                 mapped_addr = -1;
 616
 617         if (unlikely(mapped_addr == -1))
 618                 if (!test_and_set_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
 619                         queue_work(ehea_driver_wq, &ehea_rereg_mr_task);
 620
 621         return mapped_addr;
 622 }
 623
 624 int ehea_reg_kernel_mr(struct ehea_adapter *adapter, struct ehea_mr *mr)
 625 {
 626         int ret;
 627         u64 *pt;
 628         void *pg;
 629         u64 hret, pt_abs, i, j, m, mr_len;
 630         u32 acc_ctrl = EHEA_MR_ACC_CTRL;
 631
 632         mr_len = ehea_bmap.valid_sections * EHEA_SECTSIZE;
 633
 634         pt =  kzalloc(EHEA_MAX_RPAGE * sizeof(u64), GFP_KERNEL);
 635         if (!pt) {
 636                 ehea_error("no mem");
 637                 ret = -ENOMEM;
 638                 goto out;
 639         }
 640         pt_abs = virt_to_abs(pt);
 641
 642         hret = ehea_h_alloc_resource_mr(adapter->handle,
 643                                         EHEA_BUSMAP_START, mr_len,
 644                                         acc_ctrl, adapter->pd,
 645                                         &mr->handle, &mr->lkey);
 646         if (hret != H_SUCCESS) {
 647                 ehea_error("alloc_resource_mr failed");
 648                 ret = -EIO;
 649                 goto out;
 650         }
 651
 652         for (i = 0 ; i < ehea_bmap.entries; i++)
 653                 if (ehea_bmap.vaddr[i]) {
 654                         void *sectbase = __va(i << SECTION_SIZE_BITS);
 655                         unsigned long k = 0;
 656
 657                         for (j = 0; j < (PAGES_PER_SECTION / EHEA_MAX_RPAGE);
 658                               j++) {
 659
 660                                 for (m = 0; m < EHEA_MAX_RPAGE; m++) {
 661                                         pg = sectbase + ((k++) * EHEA_PAGESIZE);
 662                                         pt[m] = virt_to_abs(pg);
 663                                 }
 664
 665                                 hret = ehea_h_register_rpage_mr(adapter->handle,
 666                                                                 mr->handle,
 667                                                                 0, 0, pt_abs,
 668                                                                 EHEA_MAX_RPAGE);
 669                                 if ((hret != H_SUCCESS)
 670                                     && (hret != H_PAGE_REGISTERED)) {
 671                                         ehea_h_free_resource(adapter->handle,
 672                                                              mr->handle,
 673                                                              FORCE_FREE);
 674                                         ehea_error("register_rpage_mr failed");
 675                                         ret = -EIO;
 676                                         goto out;
 677                                 }
 678                         }
 679                 }
 680
 681         if (hret != H_SUCCESS) {
 682                 ehea_h_free_resource(adapter->handle, mr->handle, FORCE_FREE);
 683                 ehea_error("registering mr failed");
 684                 ret = -EIO;
 685                 goto out;
 686         }
 687
 688         mr->vaddr = EHEA_BUSMAP_START;
 689         mr->adapter = adapter;
 690         ret = 0;
 691 out:
 692         kfree(pt);
 693         return ret;
 694 }
 695
 696 int ehea_rem_mr(struct ehea_mr *mr)
 697 {
 698         u64 hret;
 699
 700         if (!mr || !mr->adapter)
 701                 return -EINVAL;
 702
 703         hret = ehea_h_free_resource(mr->adapter->handle, mr->handle,
 704                                     FORCE_FREE);
 705         if (hret != H_SUCCESS) {
 706                 ehea_error("destroy MR failed");
 707                 return -EIO;
 708         }
 709
 710         return 0;
 711 }
 712
 713 int ehea_gen_smr(struct ehea_adapter *adapter, struct ehea_mr *old_mr,
 714                  struct ehea_mr *shared_mr)
 715 {
 716         u64 hret;
 717
 718         hret = ehea_h_register_smr(adapter->handle, old_mr->handle,
 719                                    old_mr->vaddr, EHEA_MR_ACC_CTRL,
 720                                    adapter->pd, shared_mr);
 721         if (hret != H_SUCCESS)
 722                 return -EIO;
 723
 724         shared_mr->adapter = adapter;
 725
 726         return 0;
 727 }
 728
 729 void print_error_data(u64 *data)
 730 {
 731         int length;
 732         u64 type = EHEA_BMASK_GET(ERROR_DATA_TYPE, data[2]);
 733         u64 resource = data[1];
 734
 735         length = EHEA_BMASK_GET(ERROR_DATA_LENGTH, data[0]);
 736
 737         if (length > EHEA_PAGESIZE)
 738                 length = EHEA_PAGESIZE;
 739
 740         if (type == 0x8) /* Queue Pair */
 741                 ehea_error("QP (resource=%lX) state: AER=0x%lX, AERR=0x%lX, "
 742                            "port=%lX", resource, data[6], data[12], data[22]);
 743
 744         if (type == 0x4) /* Completion Queue */
 745                 ehea_error("CQ (resource=%lX) state: AER=0x%lX", resource,
 746                            data[6]);
 747
 748         if (type == 0x3) /* Event Queue */
 749                 ehea_error("EQ (resource=%lX) state: AER=0x%lX", resource,
 750                            data[6]);
 751
 752         ehea_dump(data, length, "error data");
 753 }
 754
 755 void ehea_error_data(struct ehea_adapter *adapter, u64 res_handle)
 756 {
 757         unsigned long ret;
 758         u64 *rblock;
 759
 760         rblock = kzalloc(PAGE_SIZE, GFP_KERNEL);
 761         if (!rblock) {
 762                 ehea_error("Cannot allocate rblock memory.");
 763                 return;
 764         }
 765
 766         ret = ehea_h_error_data(adapter->handle,
 767                                 res_handle,
 768                                 rblock);
 769
 770         if (ret == H_R_STATE)
 771                 ehea_error("No error data is available: %lX.", res_handle);
 772         else if (ret == H_SUCCESS)
 773                 print_error_data(rblock);
 774         else
 775                 ehea_error("Error data could not be fetched: %lX", res_handle);
 776
 777         kfree(rblock);
 778 }