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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 static void *hw_qpageit_get_inc(struct hw_queue *queue)
  35 {
  36         void *retvalue = hw_qeit_get(queue);
  37
  38         queue->current_q_offset += queue->pagesize;
  39         if (queue->current_q_offset > queue->queue_length) {
  40                 queue->current_q_offset -= queue->pagesize;
  41                 retvalue = NULL;
  42         } else if (((u64) retvalue) & (EHEA_PAGESIZE-1)) {
  43                 ehea_error("not on pageboundary");
  44                 retvalue = NULL;
  45         }
  46         return retvalue;
  47 }
  48
  49 static int hw_queue_ctor(struct hw_queue *queue, const u32 nr_of_pages,
  50                           const u32 pagesize, const u32 qe_size)
  51 {
  52         int pages_per_kpage = PAGE_SIZE / pagesize;
  53         int i, k;
  54
  55         if ((pagesize > PAGE_SIZE) || (!pages_per_kpage)) {
  56                 ehea_error("pagesize conflict! kernel pagesize=%d, "
  57                            "ehea pagesize=%d", (int)PAGE_SIZE, (int)pagesize);
  58                 return -EINVAL;
  59         }
  60
  61         queue->queue_length = nr_of_pages * pagesize;
  62         queue->queue_pages = kmalloc(nr_of_pages * sizeof(void*), GFP_KERNEL);
  63         if (!queue->queue_pages) {
  64                 ehea_error("no mem for queue_pages");
  65                 return -ENOMEM;
  66         }
  67
  68         /*
  69          * allocate pages for queue:
  70          * outer loop allocates whole kernel pages (page aligned) and
  71          * inner loop divides a kernel page into smaller hea queue pages
  72          */
  73         i = 0;
  74         while (i < nr_of_pages) {
  75                 u8 *kpage = (u8*)get_zeroed_page(GFP_KERNEL);
  76                 if (!kpage)
  77                         goto out_nomem;
  78                 for (k = 0; k < pages_per_kpage && i < nr_of_pages; k++) {
  79                         (queue->queue_pages)[i] = (struct ehea_page*)kpage;
  80                         kpage += pagesize;
  81                         i++;
  82                 }
  83         }
  84
  85         queue->current_q_offset = 0;
  86         queue->qe_size = qe_size;
  87         queue->pagesize = pagesize;
  88         queue->toggle_state = 1;
  89
  90         return 0;
  91 out_nomem:
  92         for (i = 0; i < nr_of_pages; i += pages_per_kpage) {
  93                 if (!(queue->queue_pages)[i])
  94                         break;
  95                 free_page((unsigned long)(queue->queue_pages)[i]);
  96         }
  97         return -ENOMEM;
  98 }
  99
 100 static void hw_queue_dtor(struct hw_queue *queue)
 101 {
 102         int pages_per_kpage = PAGE_SIZE / queue->pagesize;
 103         int i, nr_pages;
 104
 105         if (!queue || !queue->queue_pages)
 106                 return;
 107
 108         nr_pages = queue->queue_length / queue->pagesize;
 109
 110         for (i = 0; i < nr_pages; i += pages_per_kpage)
 111                 free_page((unsigned long)(queue->queue_pages)[i]);
 112
 113         kfree(queue->queue_pages);
 114 }
 115
 116 struct ehea_cq *ehea_create_cq(struct ehea_adapter *adapter,
 117                                int nr_of_cqe, u64 eq_handle, u32 cq_token)
 118 {
 119         struct ehea_cq *cq;
 120         struct h_epa epa;
 121         u64 *cq_handle_ref, hret, rpage;
 122         u32 act_nr_of_entries, act_pages, counter;
 123         int ret;
 124         void *vpage;
 125
 126         cq = kzalloc(sizeof(*cq), GFP_KERNEL);
 127         if (!cq) {
 128                 ehea_error("no mem for cq");
 129                 goto out_nomem;
 130         }
 131
 132         cq->attr.max_nr_of_cqes = nr_of_cqe;
 133         cq->attr.cq_token = cq_token;
 134         cq->attr.eq_handle = eq_handle;
 135
 136         cq->adapter = adapter;
 137
 138         cq_handle_ref = &cq->fw_handle;
 139         act_nr_of_entries = 0;
 140         act_pages = 0;
 141
 142         hret = ehea_h_alloc_resource_cq(adapter->handle, &cq->attr,
 143                                         &cq->fw_handle, &cq->epas);
 144         if (hret != H_SUCCESS) {
 145                 ehea_error("alloc_resource_cq failed");
 146                 goto out_freemem;
 147         }
 148
 149         ret = hw_queue_ctor(&cq->hw_queue, cq->attr.nr_pages,
 150                             EHEA_PAGESIZE, sizeof(struct ehea_cqe));
 151         if (ret)
 152                 goto out_freeres;
 153
 154         for (counter = 0; counter < cq->attr.nr_pages; counter++) {
 155                 vpage = hw_qpageit_get_inc(&cq->hw_queue);
 156                 if (!vpage) {
 157                         ehea_error("hw_qpageit_get_inc failed");
 158                         goto out_kill_hwq;
 159                 }
 160
 161                 rpage = virt_to_abs(vpage);
 162                 hret = ehea_h_register_rpage(adapter->handle,
 163                                              0, EHEA_CQ_REGISTER_ORIG,
 164                                              cq->fw_handle, rpage, 1);
 165                 if (hret < H_SUCCESS) {
 166                         ehea_error("register_rpage_cq failed ehea_cq=%p "
 167                                    "hret=%lx counter=%i act_pages=%i",
 168                                    cq, hret, counter, cq->attr.nr_pages);
 169                         goto out_kill_hwq;
 170                 }
 171
 172                 if (counter == (cq->attr.nr_pages - 1)) {
 173                         vpage = hw_qpageit_get_inc(&cq->hw_queue);
 174
 175                         if ((hret != H_SUCCESS) || (vpage)) {
 176                                 ehea_error("registration of pages not "
 177                                            "complete hret=%lx\n", hret);
 178                                 goto out_kill_hwq;
 179                         }
 180                 } else {
 181                         if ((hret != H_PAGE_REGISTERED) || (!vpage)) {
 182                                 ehea_error("CQ: registration of page failed "
 183                                            "hret=%lx\n", hret);
 184                                 goto out_kill_hwq;
 185                         }
 186                 }
 187         }
 188
 189         hw_qeit_reset(&cq->hw_queue);
 190         epa = cq->epas.kernel;
 191         ehea_reset_cq_ep(cq);
 192         ehea_reset_cq_n1(cq);
 193
 194         return cq;
 195
 196 out_kill_hwq:
 197         hw_queue_dtor(&cq->hw_queue);
 198
 199 out_freeres:
 200         ehea_h_free_resource(adapter->handle, cq->fw_handle, FORCE_FREE);
 201
 202 out_freemem:
 203         kfree(cq);
 204
 205 out_nomem:
 206         return NULL;
 207 }
 208
 209 u64 ehea_destroy_cq_res(struct ehea_cq *cq, u64 force)
 210 {
 211         u64 hret;
 212         u64 adapter_handle = cq->adapter->handle;
 213
 214         /* deregister all previous registered pages */
 215         hret = ehea_h_free_resource(adapter_handle, cq->fw_handle, force);
 216         if (hret != H_SUCCESS)
 217                 return hret;
 218
 219         hw_queue_dtor(&cq->hw_queue);
 220         kfree(cq);
 221
 222         return hret;
 223 }
 224
 225 int ehea_destroy_cq(struct ehea_cq *cq)
 226 {
 227         u64 hret;
 228         if (!cq)
 229                 return 0;
 230
 231         if ((hret = ehea_destroy_cq_res(cq, NORMAL_FREE)) == H_R_STATE) {
 232                 ehea_error_data(cq->adapter, cq->fw_handle);
 233                 hret = ehea_destroy_cq_res(cq, FORCE_FREE);
 234         }
 235
 236         if (hret != H_SUCCESS) {
 237                 ehea_error("destroy CQ failed");
 238                 return -EIO;
 239         }
 240
 241         return 0;
 242 }
 243
 244 struct ehea_eq *ehea_create_eq(struct ehea_adapter *adapter,
 245                                const enum ehea_eq_type type,
 246                                const u32 max_nr_of_eqes, const u8 eqe_gen)
 247 {
 248         int ret, i;
 249         u64 hret, rpage;
 250         void *vpage;
 251         struct ehea_eq *eq;
 252
 253         eq = kzalloc(sizeof(*eq), GFP_KERNEL);
 254         if (!eq) {
 255                 ehea_error("no mem for eq");
 256                 return NULL;
 257         }
 258
 259         eq->adapter = adapter;
 260         eq->attr.type = type;
 261         eq->attr.max_nr_of_eqes = max_nr_of_eqes;
 262         eq->attr.eqe_gen = eqe_gen;
 263         spin_lock_init(&eq->spinlock);
 264
 265         hret = ehea_h_alloc_resource_eq(adapter->handle,
 266                                         &eq->attr, &eq->fw_handle);
 267         if (hret != H_SUCCESS) {
 268                 ehea_error("alloc_resource_eq failed");
 269                 goto out_freemem;
 270         }
 271
 272         ret = hw_queue_ctor(&eq->hw_queue, eq->attr.nr_pages,
 273                             EHEA_PAGESIZE, sizeof(struct ehea_eqe));
 274         if (ret) {
 275                 ehea_error("can't allocate eq pages");
 276                 goto out_freeres;
 277         }
 278
 279         for (i = 0; i < eq->attr.nr_pages; i++) {
 280                 vpage = hw_qpageit_get_inc(&eq->hw_queue);
 281                 if (!vpage) {
 282                         ehea_error("hw_qpageit_get_inc failed");
 283                         hret = H_RESOURCE;
 284                         goto out_kill_hwq;
 285                 }
 286
 287                 rpage = virt_to_abs(vpage);
 288
 289                 hret = ehea_h_register_rpage(adapter->handle, 0,
 290                                              EHEA_EQ_REGISTER_ORIG,
 291                                              eq->fw_handle, rpage, 1);
 292
 293                 if (i == (eq->attr.nr_pages - 1)) {
 294                         /* last page */
 295                         vpage = hw_qpageit_get_inc(&eq->hw_queue);
 296                         if ((hret != H_SUCCESS) || (vpage)) {
 297                                 goto out_kill_hwq;
 298                         }
 299                 } else {
 300                         if ((hret != H_PAGE_REGISTERED) || (!vpage)) {
 301                                 goto out_kill_hwq;
 302                         }
 303                 }
 304         }
 305
 306         hw_qeit_reset(&eq->hw_queue);
 307         return eq;
 308
 309 out_kill_hwq:
 310         hw_queue_dtor(&eq->hw_queue);
 311
 312 out_freeres:
 313         ehea_h_free_resource(adapter->handle, eq->fw_handle, FORCE_FREE);
 314
 315 out_freemem:
 316         kfree(eq);
 317         return NULL;
 318 }
 319
 320 struct ehea_eqe *ehea_poll_eq(struct ehea_eq *eq)
 321 {
 322         struct ehea_eqe *eqe;
 323         unsigned long flags;
 324
 325         spin_lock_irqsave(&eq->spinlock, flags);
 326         eqe = (struct ehea_eqe*)hw_eqit_eq_get_inc_valid(&eq->hw_queue);
 327         spin_unlock_irqrestore(&eq->spinlock, flags);
 328
 329         return eqe;
 330 }
 331
 332 u64 ehea_destroy_eq_res(struct ehea_eq *eq, u64 force)
 333 {
 334         u64 hret;
 335         unsigned long flags;
 336
 337         spin_lock_irqsave(&eq->spinlock, flags);
 338
 339         hret = ehea_h_free_resource(eq->adapter->handle, eq->fw_handle, force);
 340         spin_unlock_irqrestore(&eq->spinlock, flags);
 341
 342         if (hret != H_SUCCESS)
 343                 return hret;
 344
 345         hw_queue_dtor(&eq->hw_queue);
 346         kfree(eq);
 347
 348         return hret;
 349 }
 350
 351 int ehea_destroy_eq(struct ehea_eq *eq)
 352 {
 353         u64 hret;
 354         if (!eq)
 355                 return 0;
 356
 357         if ((hret = ehea_destroy_eq_res(eq, NORMAL_FREE)) == H_R_STATE) {
 358                 ehea_error_data(eq->adapter, eq->fw_handle);
 359                 hret = ehea_destroy_eq_res(eq, FORCE_FREE);
 360         }
 361
 362         if (hret != H_SUCCESS) {
 363                 ehea_error("destroy EQ failed");
 364                 return -EIO;
 365         }
 366
 367         return 0;
 368 }
 369
 370 /**
 371  * allocates memory for a queue and registers pages in phyp
 372  */
 373 int ehea_qp_alloc_register(struct ehea_qp *qp, struct hw_queue *hw_queue,
 374                            int nr_pages, int wqe_size, int act_nr_sges,
 375                            struct ehea_adapter *adapter, int h_call_q_selector)
 376 {
 377         u64 hret, rpage;
 378         int ret, cnt;
 379         void *vpage;
 380
 381         ret = hw_queue_ctor(hw_queue, nr_pages, EHEA_PAGESIZE, wqe_size);
 382         if (ret)
 383                 return ret;
 384
 385         for (cnt = 0; cnt < nr_pages; cnt++) {
 386                 vpage = hw_qpageit_get_inc(hw_queue);
 387                 if (!vpage) {
 388                         ehea_error("hw_qpageit_get_inc failed");
 389                         goto out_kill_hwq;
 390                 }
 391                 rpage = virt_to_abs(vpage);
 392                 hret = ehea_h_register_rpage(adapter->handle,
 393                                              0, h_call_q_selector,
 394                                              qp->fw_handle, rpage, 1);
 395                 if (hret < H_SUCCESS) {
 396                         ehea_error("register_rpage_qp failed");
 397                         goto out_kill_hwq;
 398                 }
 399         }
 400         hw_qeit_reset(hw_queue);
 401         return 0;
 402
 403 out_kill_hwq:
 404         hw_queue_dtor(hw_queue);
 405         return -EIO;
 406 }
 407
 408 static inline u32 map_wqe_size(u8 wqe_enc_size)
 409 {
 410         return 128 << wqe_enc_size;
 411 }
 412
 413 struct ehea_qp *ehea_create_qp(struct ehea_adapter *adapter,
 414                                u32 pd, struct ehea_qp_init_attr *init_attr)
 415 {
 416         int ret;
 417         u64 hret;
 418         struct ehea_qp *qp;
 419         u32 wqe_size_in_bytes_sq, wqe_size_in_bytes_rq1;
 420         u32 wqe_size_in_bytes_rq2, wqe_size_in_bytes_rq3;
 421
 422
 423         qp = kzalloc(sizeof(*qp), GFP_KERNEL);
 424         if (!qp) {
 425                 ehea_error("no mem for qp");
 426                 return NULL;
 427         }
 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                 ehea_error("ehea_h_alloc_resource_qp failed");
 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                 ehea_error("can't register for sq ret=%x", 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                 ehea_error("can't register for rq1 ret=%x", 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                         ehea_error("can't register for rq2 ret=%x", 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                         ehea_error("can't register for rq3 ret=%x", 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 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;
 534         if (!qp)
 535                 return 0;
 536
 537         if ((hret = ehea_destroy_qp_res(qp, NORMAL_FREE)) == H_R_STATE) {
 538                 ehea_error_data(qp->adapter, qp->fw_handle);
 539                 hret = ehea_destroy_qp_res(qp, FORCE_FREE);
 540         }
 541
 542         if (hret != H_SUCCESS) {
 543                 ehea_error("destroy QP failed");
 544                 return -EIO;
 545         }
 546
 547         return 0;
 548 }
 549
 550 int ehea_reg_kernel_mr(struct ehea_adapter *adapter, struct ehea_mr *mr)
 551 {
 552         int i, k, ret;
 553         u64 hret, pt_abs, start, end, nr_pages;
 554         u32 acc_ctrl = EHEA_MR_ACC_CTRL;
 555         u64 *pt;
 556
 557         start = KERNELBASE;
 558         end = (u64)high_memory;
 559         nr_pages = (end - start) / EHEA_PAGESIZE;
 560
 561         pt =  kzalloc(PAGE_SIZE, GFP_KERNEL);
 562         if (!pt) {
 563                 ehea_error("no mem");
 564                 ret = -ENOMEM;
 565                 goto out;
 566         }
 567         pt_abs = virt_to_abs(pt);
 568
 569         hret = ehea_h_alloc_resource_mr(adapter->handle, start, end - start,
 570                                         acc_ctrl, adapter->pd,
 571                                         &mr->handle, &mr->lkey);
 572         if (hret != H_SUCCESS) {
 573                 ehea_error("alloc_resource_mr failed");
 574                 ret = -EIO;
 575                 goto out;
 576         }
 577
 578         mr->vaddr = KERNELBASE;
 579         k = 0;
 580
 581         while (nr_pages > 0) {
 582                 if (nr_pages > 1) {
 583                         u64 num_pages = min(nr_pages, (u64)512);
 584                         for (i = 0; i < num_pages; i++)
 585                                 pt[i] = virt_to_abs((void*)(((u64)start) +
 586                                                             ((k++) *
 587                                                              EHEA_PAGESIZE)));
 588
 589                         hret = ehea_h_register_rpage_mr(adapter->handle,
 590                                                         mr->handle, 0,
 591                                                         0, (u64)pt_abs,
 592                                                         num_pages);
 593                         nr_pages -= num_pages;
 594                 } else {
 595                         u64 abs_adr = virt_to_abs((void*)(((u64)start) +
 596                                                           (k * EHEA_PAGESIZE)));
 597
 598                         hret = ehea_h_register_rpage_mr(adapter->handle,
 599                                                         mr->handle, 0,
 600                                                         0, abs_adr,1);
 601                         nr_pages--;
 602                 }
 603
 604                 if ((hret != H_SUCCESS) && (hret != H_PAGE_REGISTERED)) {
 605                         ehea_h_free_resource(adapter->handle,
 606                                              mr->handle, FORCE_FREE);
 607                         ehea_error("register_rpage_mr failed");
 608                         ret = -EIO;
 609                         goto out;
 610                 }
 611         }
 612
 613         if (hret != H_SUCCESS) {
 614                 ehea_h_free_resource(adapter->handle, mr->handle,
 615                                      FORCE_FREE);
 616                 ehea_error("register_rpage failed for last page");
 617                 ret = -EIO;
 618                 goto out;
 619         }
 620
 621         mr->adapter = adapter;
 622         ret = 0;
 623 out:
 624         kfree(pt);
 625         return ret;
 626 }
 627
 628 int ehea_rem_mr(struct ehea_mr *mr)
 629 {
 630         u64 hret;
 631
 632         if (!mr || !mr->adapter)
 633                 return -EINVAL;
 634
 635         hret = ehea_h_free_resource(mr->adapter->handle, mr->handle,
 636                                     FORCE_FREE);
 637         if (hret != H_SUCCESS) {
 638                 ehea_error("destroy MR failed");
 639                 return -EIO;
 640         }
 641
 642         return 0;
 643 }
 644
 645 int ehea_gen_smr(struct ehea_adapter *adapter, struct ehea_mr *old_mr,
 646                  struct ehea_mr *shared_mr)
 647 {
 648         u64 hret;
 649
 650         hret = ehea_h_register_smr(adapter->handle, old_mr->handle,
 651                                    old_mr->vaddr, EHEA_MR_ACC_CTRL,
 652                                    adapter->pd, shared_mr);
 653         if (hret != H_SUCCESS)
 654                 return -EIO;
 655
 656         shared_mr->adapter = adapter;
 657
 658         return 0;
 659 }
 660
 661 void print_error_data(u64 *data)
 662 {
 663         int length;
 664         u64 type = EHEA_BMASK_GET(ERROR_DATA_TYPE, data[2]);
 665         u64 resource = data[1];
 666
 667         length = EHEA_BMASK_GET(ERROR_DATA_LENGTH, data[0]);
 668
 669         if (length > EHEA_PAGESIZE)
 670                 length = EHEA_PAGESIZE;
 671
 672         if (type == 0x8) /* Queue Pair */
 673                 ehea_error("QP (resource=%lX) state: AER=0x%lX, AERR=0x%lX, "
 674                            "port=%lX", resource, data[6], data[12], data[22]);
 675
 676         if (type == 0x4) /* Completion Queue */
 677                 ehea_error("CQ (resource=%lX) state: AER=0x%lX", resource,
 678                            data[6]);
 679
 680         if (type == 0x3) /* Event Queue */
 681                 ehea_error("EQ (resource=%lX) state: AER=0x%lX", resource,
 682                            data[6]);
 683
 684         ehea_dump(data, length, "error data");
 685 }
 686
 687 void ehea_error_data(struct ehea_adapter *adapter, u64 res_handle)
 688 {
 689         unsigned long ret;
 690         u64 *rblock;
 691
 692         rblock = kzalloc(PAGE_SIZE, GFP_KERNEL);
 693         if (!rblock) {
 694                 ehea_error("Cannot allocate rblock memory.");
 695                 return;
 696         }
 697
 698         ret = ehea_h_error_data(adapter->handle,
 699                                 res_handle,
 700                                 rblock);
 701
 702         if (ret == H_R_STATE)
 703                 ehea_error("No error data is available: %lX.", res_handle);
 704         else if (ret == H_SUCCESS)
 705                 print_error_data(rblock);
 706         else
 707                 ehea_error("Error data could not be fetched: %lX", res_handle);
 708
 709         kfree(rblock);
 710 }