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   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 work_struct ehea_rereg_mr_task;
  38
  39
  40 static void *hw_qpageit_get_inc(struct hw_queue *queue)
  41 {
  42         void *retvalue = hw_qeit_get(queue);
  43
  44         queue->current_q_offset += queue->pagesize;
  45         if (queue->current_q_offset > queue->queue_length) {
  46                 queue->current_q_offset -= queue->pagesize;
  47                 retvalue = NULL;
  48         } else if (((u64) retvalue) & (EHEA_PAGESIZE-1)) {
  49                 ehea_error("not on pageboundary");
  50                 retvalue = NULL;
  51         }
  52         return retvalue;
  53 }
  54
  55 static int hw_queue_ctor(struct hw_queue *queue, const u32 nr_of_pages,
  56                           const u32 pagesize, const u32 qe_size)
  57 {
  58         int pages_per_kpage = PAGE_SIZE / pagesize;
  59         int i, k;
  60
  61         if ((pagesize > PAGE_SIZE) || (!pages_per_kpage)) {
  62                 ehea_error("pagesize conflict! kernel pagesize=%d, "
  63                            "ehea pagesize=%d", (int)PAGE_SIZE, (int)pagesize);
  64                 return -EINVAL;
  65         }
  66
  67         queue->queue_length = nr_of_pages * pagesize;
  68         queue->queue_pages = kmalloc(nr_of_pages * sizeof(void*), GFP_KERNEL);
  69         if (!queue->queue_pages) {
  70                 ehea_error("no mem for queue_pages");
  71                 return -ENOMEM;
  72         }
  73
  74         /*
  75          * allocate pages for queue:
  76          * outer loop allocates whole kernel pages (page aligned) and
  77          * inner loop divides a kernel page into smaller hea queue pages
  78          */
  79         i = 0;
  80         while (i < nr_of_pages) {
  81                 u8 *kpage = (u8*)get_zeroed_page(GFP_KERNEL);
  82                 if (!kpage)
  83                         goto out_nomem;
  84                 for (k = 0; k < pages_per_kpage && i < nr_of_pages; k++) {
  85                         (queue->queue_pages)[i] = (struct ehea_page*)kpage;
  86                         kpage += pagesize;
  87                         i++;
  88                 }
  89         }
  90
  91         queue->current_q_offset = 0;
  92         queue->qe_size = qe_size;
  93         queue->pagesize = pagesize;
  94         queue->toggle_state = 1;
  95
  96         return 0;
  97 out_nomem:
  98         for (i = 0; i < nr_of_pages; i += pages_per_kpage) {
  99                 if (!(queue->queue_pages)[i])
 100                         break;
 101                 free_page((unsigned long)(queue->queue_pages)[i]);
 102         }
 103         return -ENOMEM;
 104 }
 105
 106 static void hw_queue_dtor(struct hw_queue *queue)
 107 {
 108         int pages_per_kpage = PAGE_SIZE / queue->pagesize;
 109         int i, nr_pages;
 110
 111         if (!queue || !queue->queue_pages)
 112                 return;
 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 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                 ehea_error("no mem for cq");
 135                 goto out_nomem;
 136         }
 137
 138         cq->attr.max_nr_of_cqes = nr_of_cqe;
 139         cq->attr.cq_token = cq_token;
 140         cq->attr.eq_handle = eq_handle;
 141
 142         cq->adapter = adapter;
 143
 144         cq_handle_ref = &cq->fw_handle;
 145         act_nr_of_entries = 0;
 146         act_pages = 0;
 147
 148         hret = ehea_h_alloc_resource_cq(adapter->handle, &cq->attr,
 149                                         &cq->fw_handle, &cq->epas);
 150         if (hret != H_SUCCESS) {
 151                 ehea_error("alloc_resource_cq failed");
 152                 goto out_freemem;
 153         }
 154
 155         ret = hw_queue_ctor(&cq->hw_queue, cq->attr.nr_pages,
 156                             EHEA_PAGESIZE, sizeof(struct ehea_cqe));
 157         if (ret)
 158                 goto out_freeres;
 159
 160         for (counter = 0; counter < cq->attr.nr_pages; counter++) {
 161                 vpage = hw_qpageit_get_inc(&cq->hw_queue);
 162                 if (!vpage) {
 163                         ehea_error("hw_qpageit_get_inc failed");
 164                         goto out_kill_hwq;
 165                 }
 166
 167                 rpage = virt_to_abs(vpage);
 168                 hret = ehea_h_register_rpage(adapter->handle,
 169                                              0, EHEA_CQ_REGISTER_ORIG,
 170                                              cq->fw_handle, rpage, 1);
 171                 if (hret < H_SUCCESS) {
 172                         ehea_error("register_rpage_cq failed ehea_cq=%p "
 173                                    "hret=%lx counter=%i act_pages=%i",
 174                                    cq, hret, counter, cq->attr.nr_pages);
 175                         goto out_kill_hwq;
 176                 }
 177
 178                 if (counter == (cq->attr.nr_pages - 1)) {
 179                         vpage = hw_qpageit_get_inc(&cq->hw_queue);
 180
 181                         if ((hret != H_SUCCESS) || (vpage)) {
 182                                 ehea_error("registration of pages not "
 183                                            "complete hret=%lx\n", hret);
 184                                 goto out_kill_hwq;
 185                         }
 186                 } else {
 187                         if ((hret != H_PAGE_REGISTERED) || (!vpage)) {
 188                                 ehea_error("CQ: registration of page failed "
 189                                            "hret=%lx\n", hret);
 190                                 goto out_kill_hwq;
 191                         }
 192                 }
 193         }
 194
 195         hw_qeit_reset(&cq->hw_queue);
 196         epa = cq->epas.kernel;
 197         ehea_reset_cq_ep(cq);
 198         ehea_reset_cq_n1(cq);
 199
 200         return cq;
 201
 202 out_kill_hwq:
 203         hw_queue_dtor(&cq->hw_queue);
 204
 205 out_freeres:
 206         ehea_h_free_resource(adapter->handle, cq->fw_handle, FORCE_FREE);
 207
 208 out_freemem:
 209         kfree(cq);
 210
 211 out_nomem:
 212         return NULL;
 213 }
 214
 215 u64 ehea_destroy_cq_res(struct ehea_cq *cq, u64 force)
 216 {
 217         u64 hret;
 218         u64 adapter_handle = cq->adapter->handle;
 219
 220         /* deregister all previous registered pages */
 221         hret = ehea_h_free_resource(adapter_handle, cq->fw_handle, force);
 222         if (hret != H_SUCCESS)
 223                 return hret;
 224
 225         hw_queue_dtor(&cq->hw_queue);
 226         kfree(cq);
 227
 228         return hret;
 229 }
 230
 231 int ehea_destroy_cq(struct ehea_cq *cq)
 232 {
 233         u64 hret;
 234         if (!cq)
 235                 return 0;
 236
 237         hcp_epas_dtor(&cq->epas);
 238
 239         if ((hret = ehea_destroy_cq_res(cq, NORMAL_FREE)) == H_R_STATE) {
 240                 ehea_error_data(cq->adapter, cq->fw_handle);
 241                 hret = ehea_destroy_cq_res(cq, FORCE_FREE);
 242         }
 243
 244         if (hret != H_SUCCESS) {
 245                 ehea_error("destroy CQ failed");
 246                 return -EIO;
 247         }
 248
 249         return 0;
 250 }
 251
 252 struct ehea_eq *ehea_create_eq(struct ehea_adapter *adapter,
 253                                const enum ehea_eq_type type,
 254                                const u32 max_nr_of_eqes, const u8 eqe_gen)
 255 {
 256         int ret, i;
 257         u64 hret, rpage;
 258         void *vpage;
 259         struct ehea_eq *eq;
 260
 261         eq = kzalloc(sizeof(*eq), GFP_KERNEL);
 262         if (!eq) {
 263                 ehea_error("no mem for eq");
 264                 return NULL;
 265         }
 266
 267         eq->adapter = adapter;
 268         eq->attr.type = type;
 269         eq->attr.max_nr_of_eqes = max_nr_of_eqes;
 270         eq->attr.eqe_gen = eqe_gen;
 271         spin_lock_init(&eq->spinlock);
 272
 273         hret = ehea_h_alloc_resource_eq(adapter->handle,
 274                                         &eq->attr, &eq->fw_handle);
 275         if (hret != H_SUCCESS) {
 276                 ehea_error("alloc_resource_eq failed");
 277                 goto out_freemem;
 278         }
 279
 280         ret = hw_queue_ctor(&eq->hw_queue, eq->attr.nr_pages,
 281                             EHEA_PAGESIZE, sizeof(struct ehea_eqe));
 282         if (ret) {
 283                 ehea_error("can't allocate eq pages");
 284                 goto out_freeres;
 285         }
 286
 287         for (i = 0; i < eq->attr.nr_pages; i++) {
 288                 vpage = hw_qpageit_get_inc(&eq->hw_queue);
 289                 if (!vpage) {
 290                         ehea_error("hw_qpageit_get_inc failed");
 291                         hret = H_RESOURCE;
 292                         goto out_kill_hwq;
 293                 }
 294
 295                 rpage = virt_to_abs(vpage);
 296
 297                 hret = ehea_h_register_rpage(adapter->handle, 0,
 298                                              EHEA_EQ_REGISTER_ORIG,
 299                                              eq->fw_handle, rpage, 1);
 300
 301                 if (i == (eq->attr.nr_pages - 1)) {
 302                         /* last page */
 303                         vpage = hw_qpageit_get_inc(&eq->hw_queue);
 304                         if ((hret != H_SUCCESS) || (vpage)) {
 305                                 goto out_kill_hwq;
 306                         }
 307                 } else {
 308                         if ((hret != H_PAGE_REGISTERED) || (!vpage)) {
 309                                 goto out_kill_hwq;
 310                         }
 311                 }
 312         }
 313
 314         hw_qeit_reset(&eq->hw_queue);
 315         return eq;
 316
 317 out_kill_hwq:
 318         hw_queue_dtor(&eq->hw_queue);
 319
 320 out_freeres:
 321         ehea_h_free_resource(adapter->handle, eq->fw_handle, FORCE_FREE);
 322
 323 out_freemem:
 324         kfree(eq);
 325         return NULL;
 326 }
 327
 328 struct ehea_eqe *ehea_poll_eq(struct ehea_eq *eq)
 329 {
 330         struct ehea_eqe *eqe;
 331         unsigned long flags;
 332
 333         spin_lock_irqsave(&eq->spinlock, flags);
 334         eqe = (struct ehea_eqe*)hw_eqit_eq_get_inc_valid(&eq->hw_queue);
 335         spin_unlock_irqrestore(&eq->spinlock, flags);
 336
 337         return eqe;
 338 }
 339
 340 u64 ehea_destroy_eq_res(struct ehea_eq *eq, u64 force)
 341 {
 342         u64 hret;
 343         unsigned long flags;
 344
 345         spin_lock_irqsave(&eq->spinlock, flags);
 346
 347         hret = ehea_h_free_resource(eq->adapter->handle, eq->fw_handle, force);
 348         spin_unlock_irqrestore(&eq->spinlock, flags);
 349
 350         if (hret != H_SUCCESS)
 351                 return hret;
 352
 353         hw_queue_dtor(&eq->hw_queue);
 354         kfree(eq);
 355
 356         return hret;
 357 }
 358
 359 int ehea_destroy_eq(struct ehea_eq *eq)
 360 {
 361         u64 hret;
 362         if (!eq)
 363                 return 0;
 364
 365         hcp_epas_dtor(&eq->epas);
 366
 367         if ((hret = ehea_destroy_eq_res(eq, NORMAL_FREE)) == H_R_STATE) {
 368                 ehea_error_data(eq->adapter, eq->fw_handle);
 369                 hret = ehea_destroy_eq_res(eq, FORCE_FREE);
 370         }
 371
 372         if (hret != H_SUCCESS) {
 373                 ehea_error("destroy EQ failed");
 374                 return -EIO;
 375         }
 376
 377         return 0;
 378 }
 379
 380 /**
 381  * allocates memory for a queue and registers pages in phyp
 382  */
 383 int ehea_qp_alloc_register(struct ehea_qp *qp, struct hw_queue *hw_queue,
 384                            int nr_pages, int wqe_size, int act_nr_sges,
 385                            struct ehea_adapter *adapter, int h_call_q_selector)
 386 {
 387         u64 hret, rpage;
 388         int ret, cnt;
 389         void *vpage;
 390
 391         ret = hw_queue_ctor(hw_queue, nr_pages, EHEA_PAGESIZE, wqe_size);
 392         if (ret)
 393                 return ret;
 394
 395         for (cnt = 0; cnt < nr_pages; cnt++) {
 396                 vpage = hw_qpageit_get_inc(hw_queue);
 397                 if (!vpage) {
 398                         ehea_error("hw_qpageit_get_inc failed");
 399                         goto out_kill_hwq;
 400                 }
 401                 rpage = virt_to_abs(vpage);
 402                 hret = ehea_h_register_rpage(adapter->handle,
 403                                              0, h_call_q_selector,
 404                                              qp->fw_handle, rpage, 1);
 405                 if (hret < H_SUCCESS) {
 406                         ehea_error("register_rpage_qp failed");
 407                         goto out_kill_hwq;
 408                 }
 409         }
 410         hw_qeit_reset(hw_queue);
 411         return 0;
 412
 413 out_kill_hwq:
 414         hw_queue_dtor(hw_queue);
 415         return -EIO;
 416 }
 417
 418 static inline u32 map_wqe_size(u8 wqe_enc_size)
 419 {
 420         return 128 << wqe_enc_size;
 421 }
 422
 423 struct ehea_qp *ehea_create_qp(struct ehea_adapter *adapter,
 424                                u32 pd, struct ehea_qp_init_attr *init_attr)
 425 {
 426         int ret;
 427         u64 hret;
 428         struct ehea_qp *qp;
 429         u32 wqe_size_in_bytes_sq, wqe_size_in_bytes_rq1;
 430         u32 wqe_size_in_bytes_rq2, wqe_size_in_bytes_rq3;
 431
 432
 433         qp = kzalloc(sizeof(*qp), GFP_KERNEL);
 434         if (!qp) {
 435                 ehea_error("no mem for qp");
 436                 return NULL;
 437         }
 438
 439         qp->adapter = adapter;
 440
 441         hret = ehea_h_alloc_resource_qp(adapter->handle, init_attr, pd,
 442                                         &qp->fw_handle, &qp->epas);
 443         if (hret != H_SUCCESS) {
 444                 ehea_error("ehea_h_alloc_resource_qp failed");
 445                 goto out_freemem;
 446         }
 447
 448         wqe_size_in_bytes_sq = map_wqe_size(init_attr->act_wqe_size_enc_sq);
 449         wqe_size_in_bytes_rq1 = map_wqe_size(init_attr->act_wqe_size_enc_rq1);
 450         wqe_size_in_bytes_rq2 = map_wqe_size(init_attr->act_wqe_size_enc_rq2);
 451         wqe_size_in_bytes_rq3 = map_wqe_size(init_attr->act_wqe_size_enc_rq3);
 452
 453         ret = ehea_qp_alloc_register(qp, &qp->hw_squeue, init_attr->nr_sq_pages,
 454                                      wqe_size_in_bytes_sq,
 455                                      init_attr->act_wqe_size_enc_sq, adapter,
 456                                      0);
 457         if (ret) {
 458                 ehea_error("can't register for sq ret=%x", ret);
 459                 goto out_freeres;
 460         }
 461
 462         ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue1,
 463                                      init_attr->nr_rq1_pages,
 464                                      wqe_size_in_bytes_rq1,
 465                                      init_attr->act_wqe_size_enc_rq1,
 466                                      adapter, 1);
 467         if (ret) {
 468                 ehea_error("can't register for rq1 ret=%x", ret);
 469                 goto out_kill_hwsq;
 470         }
 471
 472         if (init_attr->rq_count > 1) {
 473                 ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue2,
 474                                              init_attr->nr_rq2_pages,
 475                                              wqe_size_in_bytes_rq2,
 476                                              init_attr->act_wqe_size_enc_rq2,
 477                                              adapter, 2);
 478                 if (ret) {
 479                         ehea_error("can't register for rq2 ret=%x", ret);
 480                         goto out_kill_hwr1q;
 481                 }
 482         }
 483
 484         if (init_attr->rq_count > 2) {
 485                 ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue3,
 486                                              init_attr->nr_rq3_pages,
 487                                              wqe_size_in_bytes_rq3,
 488                                              init_attr->act_wqe_size_enc_rq3,
 489                                              adapter, 3);
 490                 if (ret) {
 491                         ehea_error("can't register for rq3 ret=%x", ret);
 492                         goto out_kill_hwr2q;
 493                 }
 494         }
 495
 496         qp->init_attr = *init_attr;
 497
 498         return qp;
 499
 500 out_kill_hwr2q:
 501         hw_queue_dtor(&qp->hw_rqueue2);
 502
 503 out_kill_hwr1q:
 504         hw_queue_dtor(&qp->hw_rqueue1);
 505
 506 out_kill_hwsq:
 507         hw_queue_dtor(&qp->hw_squeue);
 508
 509 out_freeres:
 510         ehea_h_disable_and_get_hea(adapter->handle, qp->fw_handle);
 511         ehea_h_free_resource(adapter->handle, qp->fw_handle, FORCE_FREE);
 512
 513 out_freemem:
 514         kfree(qp);
 515         return NULL;
 516 }
 517
 518 u64 ehea_destroy_qp_res(struct ehea_qp *qp, u64 force)
 519 {
 520         u64 hret;
 521         struct ehea_qp_init_attr *qp_attr = &qp->init_attr;
 522
 523
 524         ehea_h_disable_and_get_hea(qp->adapter->handle, qp->fw_handle);
 525         hret = ehea_h_free_resource(qp->adapter->handle, qp->fw_handle, force);
 526         if (hret != H_SUCCESS)
 527                 return hret;
 528
 529         hw_queue_dtor(&qp->hw_squeue);
 530         hw_queue_dtor(&qp->hw_rqueue1);
 531
 532         if (qp_attr->rq_count > 1)
 533                 hw_queue_dtor(&qp->hw_rqueue2);
 534         if (qp_attr->rq_count > 2)
 535                 hw_queue_dtor(&qp->hw_rqueue3);
 536         kfree(qp);
 537
 538         return hret;
 539 }
 540
 541 int ehea_destroy_qp(struct ehea_qp *qp)
 542 {
 543         u64 hret;
 544         if (!qp)
 545                 return 0;
 546
 547         hcp_epas_dtor(&qp->epas);
 548
 549         if ((hret = ehea_destroy_qp_res(qp, NORMAL_FREE)) == H_R_STATE) {
 550                 ehea_error_data(qp->adapter, qp->fw_handle);
 551                 hret = ehea_destroy_qp_res(qp, FORCE_FREE);
 552         }
 553
 554         if (hret != H_SUCCESS) {
 555                 ehea_error("destroy QP failed");
 556                 return -EIO;
 557         }
 558
 559         return 0;
 560 }
 561
 562 int ehea_create_busmap( void )
 563 {
 564         u64 vaddr = EHEA_BUSMAP_START;
 565         unsigned long high_section_index = 0;
 566         int i;
 567
 568         /*
 569          * Sections are not in ascending order -> Loop over all sections and
 570          * find the highest PFN to compute the required map size.
 571         */
 572         ehea_bmap.valid_sections = 0;
 573
 574         for (i = 0; i < NR_MEM_SECTIONS; i++)
 575                 if (valid_section_nr(i))
 576                         high_section_index = i;
 577
 578         ehea_bmap.entries = high_section_index + 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                         ehea_bmap.valid_sections++;
 591                 } else
 592                         ehea_bmap.vaddr[i] = 0;
 593         }
 594
 595         return 0;
 596 }
 597
 598 void ehea_destroy_busmap( void )
 599 {
 600         vfree(ehea_bmap.vaddr);
 601 }
 602
 603 u64 ehea_map_vaddr(void *caddr)
 604 {
 605         u64 mapped_addr;
 606         unsigned long index = __pa(caddr) >> SECTION_SIZE_BITS;
 607
 608         if (likely(index < ehea_bmap.entries)) {
 609                 mapped_addr = ehea_bmap.vaddr[index];
 610                 if (likely(mapped_addr))
 611                         mapped_addr |= (((unsigned long)caddr)
 612                                         & (EHEA_SECTSIZE - 1));
 613                 else
 614                         mapped_addr = -1;
 615         } else
 616                 mapped_addr = -1;
 617
 618         if (unlikely(mapped_addr == -1))
 619                 if (!test_and_set_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
 620                         schedule_work(&ehea_rereg_mr_task);
 621
 622         return mapped_addr;
 623 }
 624
 625 int ehea_reg_kernel_mr(struct ehea_adapter *adapter, struct ehea_mr *mr)
 626 {
 627         int ret;
 628         u64 *pt;
 629         void *pg;
 630         u64 hret, pt_abs, i, j, m, mr_len;
 631         u32 acc_ctrl = EHEA_MR_ACC_CTRL;
 632
 633         mr_len = ehea_bmap.valid_sections * EHEA_SECTSIZE;
 634
 635         pt =  kzalloc(PAGE_SIZE, GFP_KERNEL);
 636         if (!pt) {
 637                 ehea_error("no mem");
 638                 ret = -ENOMEM;
 639                 goto out;
 640         }
 641         pt_abs = virt_to_abs(pt);
 642
 643         hret = ehea_h_alloc_resource_mr(adapter->handle,
 644                                         EHEA_BUSMAP_START, mr_len,
 645                                         acc_ctrl, adapter->pd,
 646                                         &mr->handle, &mr->lkey);
 647         if (hret != H_SUCCESS) {
 648                 ehea_error("alloc_resource_mr failed");
 649                 ret = -EIO;
 650                 goto out;
 651         }
 652
 653         for (i = 0 ; i < ehea_bmap.entries; i++)
 654                 if (ehea_bmap.vaddr[i]) {
 655                         void *sectbase = __va(i << SECTION_SIZE_BITS);
 656                         unsigned long k = 0;
 657
 658                         for (j = 0; j < (EHEA_PAGES_PER_SECTION /
 659                                          EHEA_MAX_RPAGE); j++) {
 660
 661                                 for (m = 0; m < EHEA_MAX_RPAGE; m++) {
 662                                         pg = sectbase + ((k++) * EHEA_PAGESIZE);
 663                                         pt[m] = virt_to_abs(pg);
 664                                 }
 665
 666                                 hret = ehea_h_register_rpage_mr(adapter->handle,
 667                                                                 mr->handle,
 668                                                                 0, 0, pt_abs,
 669                                                                 EHEA_MAX_RPAGE);
 670                                 if ((hret != H_SUCCESS)
 671                                     && (hret != H_PAGE_REGISTERED)) {
 672                                         ehea_h_free_resource(adapter->handle,
 673                                                              mr->handle,
 674                                                              FORCE_FREE);
 675                                         ehea_error("register_rpage_mr failed");
 676                                         ret = -EIO;
 677                                         goto out;
 678                                 }
 679                         }
 680                 }
 681
 682         if (hret != H_SUCCESS) {
 683                 ehea_h_free_resource(adapter->handle, mr->handle, FORCE_FREE);
 684                 ehea_error("registering mr failed");
 685                 ret = -EIO;
 686                 goto out;
 687         }
 688
 689         mr->vaddr = EHEA_BUSMAP_START;
 690         mr->adapter = adapter;
 691         ret = 0;
 692 out:
 693         kfree(pt);
 694         return ret;
 695 }
 696
 697 int ehea_rem_mr(struct ehea_mr *mr)
 698 {
 699         u64 hret;
 700
 701         if (!mr || !mr->adapter)
 702                 return -EINVAL;
 703
 704         hret = ehea_h_free_resource(mr->adapter->handle, mr->handle,
 705                                     FORCE_FREE);
 706         if (hret != H_SUCCESS) {
 707                 ehea_error("destroy MR failed");
 708                 return -EIO;
 709         }
 710
 711         return 0;
 712 }
 713
 714 int ehea_gen_smr(struct ehea_adapter *adapter, struct ehea_mr *old_mr,
 715                  struct ehea_mr *shared_mr)
 716 {
 717         u64 hret;
 718
 719         hret = ehea_h_register_smr(adapter->handle, old_mr->handle,
 720                                    old_mr->vaddr, EHEA_MR_ACC_CTRL,
 721                                    adapter->pd, shared_mr);
 722         if (hret != H_SUCCESS)
 723                 return -EIO;
 724
 725         shared_mr->adapter = adapter;
 726
 727         return 0;
 728 }
 729
 730 void print_error_data(u64 *data)
 731 {
 732         int length;
 733         u64 type = EHEA_BMASK_GET(ERROR_DATA_TYPE, data[2]);
 734         u64 resource = data[1];
 735
 736         length = EHEA_BMASK_GET(ERROR_DATA_LENGTH, data[0]);
 737
 738         if (length > EHEA_PAGESIZE)
 739                 length = EHEA_PAGESIZE;
 740
 741         if (type == 0x8) /* Queue Pair */
 742                 ehea_error("QP (resource=%lX) state: AER=0x%lX, AERR=0x%lX, "
 743                            "port=%lX", resource, data[6], data[12], data[22]);
 744
 745         if (type == 0x4) /* Completion Queue */
 746                 ehea_error("CQ (resource=%lX) state: AER=0x%lX", resource,
 747                            data[6]);
 748
 749         if (type == 0x3) /* Event Queue */
 750                 ehea_error("EQ (resource=%lX) state: AER=0x%lX", resource,
 751                            data[6]);
 752
 753         ehea_dump(data, length, "error data");
 754 }
 755
 756 void ehea_error_data(struct ehea_adapter *adapter, u64 res_handle)
 757 {
 758         unsigned long ret;
 759         u64 *rblock;
 760
 761         rblock = kzalloc(PAGE_SIZE, GFP_KERNEL);
 762         if (!rblock) {
 763                 ehea_error("Cannot allocate rblock memory.");
 764                 return;
 765         }
 766
 767         ret = ehea_h_error_data(adapter->handle,
 768                                 res_handle,
 769                                 rblock);
 770
 771         if (ret == H_R_STATE)
 772                 ehea_error("No error data is available: %lX.", res_handle);
 773         else if (ret == H_SUCCESS)
 774                 print_error_data(rblock);
 775         else
 776                 ehea_error("Error data could not be fetched: %lX", res_handle);
 777
 778         kfree(rblock);
 779 }