drivers/infiniband/hw/ehca/ehca_mrmw.c

   1 /*
   2  *  IBM eServer eHCA Infiniband device driver for Linux on POWER
   3  *
   4  *  MR/MW functions
   5  *
   6  *  Authors: Dietmar Decker <ddecker@de.ibm.com>
   7  *           Christoph Raisch <raisch@de.ibm.com>
   8  *           Hoang-Nam Nguyen <hnguyen@de.ibm.com>
   9  *
  10  *  Copyright (c) 2005 IBM Corporation
  11  *
  12  *  All rights reserved.
  13  *
  14  *  This source code is distributed under a dual license of GPL v2.0 and OpenIB
  15  *  BSD.
  16  *
  17  * OpenIB BSD License
  18  *
  19  * Redistribution and use in source and binary forms, with or without
  20  * modification, are permitted provided that the following conditions are met:
  21  *
  22  * Redistributions of source code must retain the above copyright notice, this
  23  * list of conditions and the following disclaimer.
  24  *
  25  * Redistributions in binary form must reproduce the above copyright notice,
  26  * this list of conditions and the following disclaimer in the documentation
  27  * and/or other materials
  28  * provided with the distribution.
  29  *
  30  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  31  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  32  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  33  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  34  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  35  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  36  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  37  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  38  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  39  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  40  * POSSIBILITY OF SUCH DAMAGE.
  41  */
  42
  43 #include <linux/slab.h>
  44 #include <rdma/ib_umem.h>
  45
  46 #include "ehca_iverbs.h"
  47 #include "ehca_mrmw.h"
  48 #include "hcp_if.h"
  49 #include "hipz_hw.h"
  50
  51 #define NUM_CHUNKS(length, chunk_size) \
  52         (((length) + (chunk_size - 1)) / (chunk_size))
  53
  54 /* max number of rpages (per hcall register_rpages) */
  55 #define MAX_RPAGES 512
  56
  57 /* DMEM toleration management */
  58 #define EHCA_SECTSHIFT        SECTION_SIZE_BITS
  59 #define EHCA_SECTSIZE          (1UL << EHCA_SECTSHIFT)
  60 #define EHCA_HUGEPAGESHIFT     34
  61 #define EHCA_HUGEPAGE_SIZE     (1UL << EHCA_HUGEPAGESHIFT)
  62 #define EHCA_HUGEPAGE_PFN_MASK ((EHCA_HUGEPAGE_SIZE - 1) >> PAGE_SHIFT)
  63 #define EHCA_INVAL_ADDR        0xFFFFFFFFFFFFFFFFULL
  64 #define EHCA_DIR_INDEX_SHIFT 13                   /* 8k Entries in 64k block */
  65 #define EHCA_TOP_INDEX_SHIFT (EHCA_DIR_INDEX_SHIFT * 2)
  66 #define EHCA_MAP_ENTRIES (1 << EHCA_DIR_INDEX_SHIFT)
  67 #define EHCA_TOP_MAP_SIZE (0x10000)               /* currently fixed map size */
  68 #define EHCA_DIR_MAP_SIZE (0x10000)
  69 #define EHCA_ENT_MAP_SIZE (0x10000)
  70 #define EHCA_INDEX_MASK (EHCA_MAP_ENTRIES - 1)
  71
  72 static unsigned long ehca_mr_len;
  73
  74 /*
  75  * Memory map data structures
  76  */
  77 struct ehca_dir_bmap {
  78         u64 ent[EHCA_MAP_ENTRIES];
  79 };
  80 struct ehca_top_bmap {
  81         struct ehca_dir_bmap *dir[EHCA_MAP_ENTRIES];
  82 };
  83 struct ehca_bmap {
  84         struct ehca_top_bmap *top[EHCA_MAP_ENTRIES];
  85 };
  86
  87 static struct ehca_bmap *ehca_bmap;
  88
  89 static struct kmem_cache *mr_cache;
  90 static struct kmem_cache *mw_cache;
  91
  92 enum ehca_mr_pgsize {
  93         EHCA_MR_PGSIZE4K  = 0x1000L,
  94         EHCA_MR_PGSIZE64K = 0x10000L,
  95         EHCA_MR_PGSIZE1M  = 0x100000L,
  96         EHCA_MR_PGSIZE16M = 0x1000000L
  97 };
  98
  99 #define EHCA_MR_PGSHIFT4K  12
 100 #define EHCA_MR_PGSHIFT64K 16
 101 #define EHCA_MR_PGSHIFT1M  20
 102 #define EHCA_MR_PGSHIFT16M 24
 103
 104 static u64 ehca_map_vaddr(void *caddr);
 105
 106 static u32 ehca_encode_hwpage_size(u32 pgsize)
 107 {
 108         int log = ilog2(pgsize);
 109         WARN_ON(log < 12 || log > 24 || log & 3);
 110         return (log - 12) / 4;
 111 }
 112
 113 static u64 ehca_get_max_hwpage_size(struct ehca_shca *shca)
 114 {
 115         return 1UL << ilog2(shca->hca_cap_mr_pgsize);
 116 }
 117
 118 static struct ehca_mr *ehca_mr_new(void)
 119 {
 120         struct ehca_mr *me;
 121
 122         me = kmem_cache_zalloc(mr_cache, GFP_KERNEL);
 123         if (me)
 124                 spin_lock_init(&me->mrlock);
 125         else
 126                 ehca_gen_err("alloc failed");
 127
 128         return me;
 129 }
 130
 131 static void ehca_mr_delete(struct ehca_mr *me)
 132 {
 133         kmem_cache_free(mr_cache, me);
 134 }
 135
 136 static struct ehca_mw *ehca_mw_new(void)
 137 {
 138         struct ehca_mw *me;
 139
 140         me = kmem_cache_zalloc(mw_cache, GFP_KERNEL);
 141         if (me)
 142                 spin_lock_init(&me->mwlock);
 143         else
 144                 ehca_gen_err("alloc failed");
 145
 146         return me;
 147 }
 148
 149 static void ehca_mw_delete(struct ehca_mw *me)
 150 {
 151         kmem_cache_free(mw_cache, me);
 152 }
 153
 154 /*----------------------------------------------------------------------*/
 155
 156 struct ib_mr *ehca_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
 157 {
 158         struct ib_mr *ib_mr;
 159         int ret;
 160         struct ehca_mr *e_maxmr;
 161         struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
 162         struct ehca_shca *shca =
 163                 container_of(pd->device, struct ehca_shca, ib_device);
 164
 165         if (shca->maxmr) {
 166                 e_maxmr = ehca_mr_new();
 167                 if (!e_maxmr) {
 168                         ehca_err(&shca->ib_device, "out of memory");
 169                         ib_mr = ERR_PTR(-ENOMEM);
 170                         goto get_dma_mr_exit0;
 171                 }
 172
 173                 ret = ehca_reg_maxmr(shca, e_maxmr,
 174                                      (void *)ehca_map_vaddr((void *)KERNELBASE),
 175                                      mr_access_flags, e_pd,
 176                                      &e_maxmr->ib.ib_mr.lkey,
 177                                      &e_maxmr->ib.ib_mr.rkey);
 178                 if (ret) {
 179                         ehca_mr_delete(e_maxmr);
 180                         ib_mr = ERR_PTR(ret);
 181                         goto get_dma_mr_exit0;
 182                 }
 183                 ib_mr = &e_maxmr->ib.ib_mr;
 184         } else {
 185                 ehca_err(&shca->ib_device, "no internal max-MR exist!");
 186                 ib_mr = ERR_PTR(-EINVAL);
 187                 goto get_dma_mr_exit0;
 188         }
 189
 190 get_dma_mr_exit0:
 191         if (IS_ERR(ib_mr))
 192                 ehca_err(&shca->ib_device, "h_ret=%li pd=%p mr_access_flags=%x",
 193                          PTR_ERR(ib_mr), pd, mr_access_flags);
 194         return ib_mr;
 195 } /* end ehca_get_dma_mr() */
 196
 197 /*----------------------------------------------------------------------*/
 198
 199 struct ib_mr *ehca_reg_phys_mr(struct ib_pd *pd,
 200                                struct ib_phys_buf *phys_buf_array,
 201                                int num_phys_buf,
 202                                int mr_access_flags,
 203                                u64 *iova_start)
 204 {
 205         struct ib_mr *ib_mr;
 206         int ret;
 207         struct ehca_mr *e_mr;
 208         struct ehca_shca *shca =
 209                 container_of(pd->device, struct ehca_shca, ib_device);
 210         struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
 211
 212         u64 size;
 213
 214         if ((num_phys_buf <= 0) || !phys_buf_array) {
 215                 ehca_err(pd->device, "bad input values: num_phys_buf=%x "
 216                          "phys_buf_array=%p", num_phys_buf, phys_buf_array);
 217                 ib_mr = ERR_PTR(-EINVAL);
 218                 goto reg_phys_mr_exit0;
 219         }
 220         if (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
 221              !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
 222             ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
 223              !(mr_access_flags & IB_ACCESS_LOCAL_WRITE))) {
 224                 /*
 225                  * Remote Write Access requires Local Write Access
 226                  * Remote Atomic Access requires Local Write Access
 227                  */
 228                 ehca_err(pd->device, "bad input values: mr_access_flags=%x",
 229                          mr_access_flags);
 230                 ib_mr = ERR_PTR(-EINVAL);
 231                 goto reg_phys_mr_exit0;
 232         }
 233
 234         /* check physical buffer list and calculate size */
 235         ret = ehca_mr_chk_buf_and_calc_size(phys_buf_array, num_phys_buf,
 236                                             iova_start, &size);
 237         if (ret) {
 238                 ib_mr = ERR_PTR(ret);
 239                 goto reg_phys_mr_exit0;
 240         }
 241         if ((size == 0) ||
 242             (((u64)iova_start + size) < (u64)iova_start)) {
 243                 ehca_err(pd->device, "bad input values: size=%llx iova_start=%p",
 244                          size, iova_start);
 245                 ib_mr = ERR_PTR(-EINVAL);
 246                 goto reg_phys_mr_exit0;
 247         }
 248
 249         e_mr = ehca_mr_new();
 250         if (!e_mr) {
 251                 ehca_err(pd->device, "out of memory");
 252                 ib_mr = ERR_PTR(-ENOMEM);
 253                 goto reg_phys_mr_exit0;
 254         }
 255
 256         /* register MR on HCA */
 257         if (ehca_mr_is_maxmr(size, iova_start)) {
 258                 e_mr->flags |= EHCA_MR_FLAG_MAXMR;
 259                 ret = ehca_reg_maxmr(shca, e_mr, iova_start, mr_access_flags,
 260                                      e_pd, &e_mr->ib.ib_mr.lkey,
 261                                      &e_mr->ib.ib_mr.rkey);
 262                 if (ret) {
 263                         ib_mr = ERR_PTR(ret);
 264                         goto reg_phys_mr_exit1;
 265                 }
 266         } else {
 267                 struct ehca_mr_pginfo pginfo;
 268                 u32 num_kpages;
 269                 u32 num_hwpages;
 270                 u64 hw_pgsize;
 271
 272                 num_kpages = NUM_CHUNKS(((u64)iova_start % PAGE_SIZE) + size,
 273                                         PAGE_SIZE);
 274                 /* for kernel space we try most possible pgsize */
 275                 hw_pgsize = ehca_get_max_hwpage_size(shca);
 276                 num_hwpages = NUM_CHUNKS(((u64)iova_start % hw_pgsize) + size,
 277                                          hw_pgsize);
 278                 memset(&pginfo, 0, sizeof(pginfo));
 279                 pginfo.type = EHCA_MR_PGI_PHYS;
 280                 pginfo.num_kpages = num_kpages;
 281                 pginfo.hwpage_size = hw_pgsize;
 282                 pginfo.num_hwpages = num_hwpages;
 283                 pginfo.u.phy.num_phys_buf = num_phys_buf;
 284                 pginfo.u.phy.phys_buf_array = phys_buf_array;
 285                 pginfo.next_hwpage =
 286                         ((u64)iova_start & ~PAGE_MASK) / hw_pgsize;
 287
 288                 ret = ehca_reg_mr(shca, e_mr, iova_start, size, mr_access_flags,
 289                                   e_pd, &pginfo, &e_mr->ib.ib_mr.lkey,
 290                                   &e_mr->ib.ib_mr.rkey, EHCA_REG_MR);
 291                 if (ret) {
 292                         ib_mr = ERR_PTR(ret);
 293                         goto reg_phys_mr_exit1;
 294                 }
 295         }
 296
 297         /* successful registration of all pages */
 298         return &e_mr->ib.ib_mr;
 299
 300 reg_phys_mr_exit1:
 301         ehca_mr_delete(e_mr);
 302 reg_phys_mr_exit0:
 303         if (IS_ERR(ib_mr))
 304                 ehca_err(pd->device, "h_ret=%li pd=%p phys_buf_array=%p "
 305                          "num_phys_buf=%x mr_access_flags=%x iova_start=%p",
 306                          PTR_ERR(ib_mr), pd, phys_buf_array,
 307                          num_phys_buf, mr_access_flags, iova_start);
 308         return ib_mr;
 309 } /* end ehca_reg_phys_mr() */
 310
 311 /*----------------------------------------------------------------------*/
 312
 313 struct ib_mr *ehca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
 314                                u64 virt, int mr_access_flags,
 315                                struct ib_udata *udata)
 316 {
 317         struct ib_mr *ib_mr;
 318         struct ehca_mr *e_mr;
 319         struct ehca_shca *shca =
 320                 container_of(pd->device, struct ehca_shca, ib_device);
 321         struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
 322         struct ehca_mr_pginfo pginfo;
 323         int ret, page_shift;
 324         u32 num_kpages;
 325         u32 num_hwpages;
 326         u64 hwpage_size;
 327
 328         if (!pd) {
 329                 ehca_gen_err("bad pd=%p", pd);
 330                 return ERR_PTR(-EFAULT);
 331         }
 332
 333         if (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
 334              !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
 335             ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
 336              !(mr_access_flags & IB_ACCESS_LOCAL_WRITE))) {
 337                 /*
 338                  * Remote Write Access requires Local Write Access
 339                  * Remote Atomic Access requires Local Write Access
 340                  */
 341                 ehca_err(pd->device, "bad input values: mr_access_flags=%x",
 342                          mr_access_flags);
 343                 ib_mr = ERR_PTR(-EINVAL);
 344                 goto reg_user_mr_exit0;
 345         }
 346
 347         if (length == 0 || virt + length < virt) {
 348                 ehca_err(pd->device, "bad input values: length=%llx "
 349                          "virt_base=%llx", length, virt);
 350                 ib_mr = ERR_PTR(-EINVAL);
 351                 goto reg_user_mr_exit0;
 352         }
 353
 354         e_mr = ehca_mr_new();
 355         if (!e_mr) {
 356                 ehca_err(pd->device, "out of memory");
 357                 ib_mr = ERR_PTR(-ENOMEM);
 358                 goto reg_user_mr_exit0;
 359         }
 360
 361         e_mr->umem = ib_umem_get(pd->uobject->context, start, length,
 362                                  mr_access_flags, 0);
 363         if (IS_ERR(e_mr->umem)) {
 364                 ib_mr = (void *)e_mr->umem;
 365                 goto reg_user_mr_exit1;
 366         }
 367
 368         if (e_mr->umem->page_size != PAGE_SIZE) {
 369                 ehca_err(pd->device, "page size not supported, "
 370                          "e_mr->umem->page_size=%x", e_mr->umem->page_size);
 371                 ib_mr = ERR_PTR(-EINVAL);
 372                 goto reg_user_mr_exit2;
 373         }
 374
 375         /* determine number of MR pages */
 376         num_kpages = NUM_CHUNKS((virt % PAGE_SIZE) + length, PAGE_SIZE);
 377         /* select proper hw_pgsize */
 378         page_shift = PAGE_SHIFT;
 379         if (e_mr->umem->hugetlb) {
 380                 /* determine page_shift, clamp between 4K and 16M */
 381                 page_shift = (fls64(length - 1) + 3) & ~3;
 382                 page_shift = min(max(page_shift, EHCA_MR_PGSHIFT4K),
 383                                  EHCA_MR_PGSHIFT16M);
 384         }
 385         hwpage_size = 1UL << page_shift;
 386
 387         /* now that we have the desired page size, shift until it's
 388          * supported, too. 4K is always supported, so this terminates.
 389          */
 390         while (!(hwpage_size & shca->hca_cap_mr_pgsize))
 391                 hwpage_size >>= 4;
 392
 393 reg_user_mr_fallback:
 394         num_hwpages = NUM_CHUNKS((virt % hwpage_size) + length, hwpage_size);
 395         /* register MR on HCA */
 396         memset(&pginfo, 0, sizeof(pginfo));
 397         pginfo.type = EHCA_MR_PGI_USER;
 398         pginfo.hwpage_size = hwpage_size;
 399         pginfo.num_kpages = num_kpages;
 400         pginfo.num_hwpages = num_hwpages;
 401         pginfo.u.usr.region = e_mr->umem;
 402         pginfo.next_hwpage = e_mr->umem->offset / hwpage_size;
 403         pginfo.u.usr.next_chunk = list_prepare_entry(pginfo.u.usr.next_chunk,
 404                                                      (&e_mr->umem->chunk_list),
 405                                                      list);
 406
 407         ret = ehca_reg_mr(shca, e_mr, (u64 *)virt, length, mr_access_flags,
 408                           e_pd, &pginfo, &e_mr->ib.ib_mr.lkey,
 409                           &e_mr->ib.ib_mr.rkey, EHCA_REG_MR);
 410         if (ret == -EINVAL && pginfo.hwpage_size > PAGE_SIZE) {
 411                 ehca_warn(pd->device, "failed to register mr "
 412                           "with hwpage_size=%llx", hwpage_size);
 413                 ehca_info(pd->device, "try to register mr with "
 414                           "kpage_size=%lx", PAGE_SIZE);
 415                 /*
 416                  * this means kpages are not contiguous for a hw page
 417                  * try kernel page size as fallback solution
 418                  */
 419                 hwpage_size = PAGE_SIZE;
 420                 goto reg_user_mr_fallback;
 421         }
 422         if (ret) {
 423                 ib_mr = ERR_PTR(ret);
 424                 goto reg_user_mr_exit2;
 425         }
 426
 427         /* successful registration of all pages */
 428         return &e_mr->ib.ib_mr;
 429
 430 reg_user_mr_exit2:
 431         ib_umem_release(e_mr->umem);
 432 reg_user_mr_exit1:
 433         ehca_mr_delete(e_mr);
 434 reg_user_mr_exit0:
 435         if (IS_ERR(ib_mr))
 436                 ehca_err(pd->device, "rc=%li pd=%p mr_access_flags=%x udata=%p",
 437                          PTR_ERR(ib_mr), pd, mr_access_flags, udata);
 438         return ib_mr;
 439 } /* end ehca_reg_user_mr() */
 440
 441 /*----------------------------------------------------------------------*/
 442
 443 int ehca_rereg_phys_mr(struct ib_mr *mr,
 444                        int mr_rereg_mask,
 445                        struct ib_pd *pd,
 446                        struct ib_phys_buf *phys_buf_array,
 447                        int num_phys_buf,
 448                        int mr_access_flags,
 449                        u64 *iova_start)
 450 {
 451         int ret;
 452
 453         struct ehca_shca *shca =
 454                 container_of(mr->device, struct ehca_shca, ib_device);
 455         struct ehca_mr *e_mr = container_of(mr, struct ehca_mr, ib.ib_mr);
 456         u64 new_size;
 457         u64 *new_start;
 458         u32 new_acl;
 459         struct ehca_pd *new_pd;
 460         u32 tmp_lkey, tmp_rkey;
 461         unsigned long sl_flags;
 462         u32 num_kpages = 0;
 463         u32 num_hwpages = 0;
 464         struct ehca_mr_pginfo pginfo;
 465
 466         if (!(mr_rereg_mask & IB_MR_REREG_TRANS)) {
 467                 /* TODO not supported, because PHYP rereg hCall needs pages */
 468                 ehca_err(mr->device, "rereg without IB_MR_REREG_TRANS not "
 469                          "supported yet, mr_rereg_mask=%x", mr_rereg_mask);
 470                 ret = -EINVAL;
 471                 goto rereg_phys_mr_exit0;
 472         }
 473
 474         if (mr_rereg_mask & IB_MR_REREG_PD) {
 475                 if (!pd) {
 476                         ehca_err(mr->device, "rereg with bad pd, pd=%p "
 477                                  "mr_rereg_mask=%x", pd, mr_rereg_mask);
 478                         ret = -EINVAL;
 479                         goto rereg_phys_mr_exit0;
 480                 }
 481         }
 482
 483         if ((mr_rereg_mask &
 484              ~(IB_MR_REREG_TRANS | IB_MR_REREG_PD | IB_MR_REREG_ACCESS)) ||
 485             (mr_rereg_mask == 0)) {
 486                 ret = -EINVAL;
 487                 goto rereg_phys_mr_exit0;
 488         }
 489
 490         /* check other parameters */
 491         if (e_mr == shca->maxmr) {
 492                 /* should be impossible, however reject to be sure */
 493                 ehca_err(mr->device, "rereg internal max-MR impossible, mr=%p "
 494                          "shca->maxmr=%p mr->lkey=%x",
 495                          mr, shca->maxmr, mr->lkey);
 496                 ret = -EINVAL;
 497                 goto rereg_phys_mr_exit0;
 498         }
 499         if (mr_rereg_mask & IB_MR_REREG_TRANS) { /* transl., i.e. addr/size */
 500                 if (e_mr->flags & EHCA_MR_FLAG_FMR) {
 501                         ehca_err(mr->device, "not supported for FMR, mr=%p "
 502                                  "flags=%x", mr, e_mr->flags);
 503                         ret = -EINVAL;
 504                         goto rereg_phys_mr_exit0;
 505                 }
 506                 if (!phys_buf_array || num_phys_buf <= 0) {
 507                         ehca_err(mr->device, "bad input values mr_rereg_mask=%x"
 508                                  " phys_buf_array=%p num_phys_buf=%x",
 509                                  mr_rereg_mask, phys_buf_array, num_phys_buf);
 510                         ret = -EINVAL;
 511                         goto rereg_phys_mr_exit0;
 512                 }
 513         }
 514         if ((mr_rereg_mask & IB_MR_REREG_ACCESS) &&     /* change ACL */
 515             (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
 516               !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
 517              ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
 518               !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)))) {
 519                 /*
 520                  * Remote Write Access requires Local Write Access
 521                  * Remote Atomic Access requires Local Write Access
 522                  */
 523                 ehca_err(mr->device, "bad input values: mr_rereg_mask=%x "
 524                          "mr_access_flags=%x", mr_rereg_mask, mr_access_flags);
 525                 ret = -EINVAL;
 526                 goto rereg_phys_mr_exit0;
 527         }
 528
 529         /* set requested values dependent on rereg request */
 530         spin_lock_irqsave(&e_mr->mrlock, sl_flags);
 531         new_start = e_mr->start;
 532         new_size = e_mr->size;
 533         new_acl = e_mr->acl;
 534         new_pd = container_of(mr->pd, struct ehca_pd, ib_pd);
 535
 536         if (mr_rereg_mask & IB_MR_REREG_TRANS) {
 537                 u64 hw_pgsize = ehca_get_max_hwpage_size(shca);
 538
 539                 new_start = iova_start; /* change address */
 540                 /* check physical buffer list and calculate size */
 541                 ret = ehca_mr_chk_buf_and_calc_size(phys_buf_array,
 542                                                     num_phys_buf, iova_start,
 543                                                     &new_size);
 544                 if (ret)
 545                         goto rereg_phys_mr_exit1;
 546                 if ((new_size == 0) ||
 547                     (((u64)iova_start + new_size) < (u64)iova_start)) {
 548                         ehca_err(mr->device, "bad input values: new_size=%llx "
 549                                  "iova_start=%p", new_size, iova_start);
 550                         ret = -EINVAL;
 551                         goto rereg_phys_mr_exit1;
 552                 }
 553                 num_kpages = NUM_CHUNKS(((u64)new_start % PAGE_SIZE) +
 554                                         new_size, PAGE_SIZE);
 555                 num_hwpages = NUM_CHUNKS(((u64)new_start % hw_pgsize) +
 556                                          new_size, hw_pgsize);
 557                 memset(&pginfo, 0, sizeof(pginfo));
 558                 pginfo.type = EHCA_MR_PGI_PHYS;
 559                 pginfo.num_kpages = num_kpages;
 560                 pginfo.hwpage_size = hw_pgsize;
 561                 pginfo.num_hwpages = num_hwpages;
 562                 pginfo.u.phy.num_phys_buf = num_phys_buf;
 563                 pginfo.u.phy.phys_buf_array = phys_buf_array;
 564                 pginfo.next_hwpage =
 565                         ((u64)iova_start & ~PAGE_MASK) / hw_pgsize;
 566         }
 567         if (mr_rereg_mask & IB_MR_REREG_ACCESS)
 568                 new_acl = mr_access_flags;
 569         if (mr_rereg_mask & IB_MR_REREG_PD)
 570                 new_pd = container_of(pd, struct ehca_pd, ib_pd);
 571
 572         ret = ehca_rereg_mr(shca, e_mr, new_start, new_size, new_acl,
 573                             new_pd, &pginfo, &tmp_lkey, &tmp_rkey);
 574         if (ret)
 575                 goto rereg_phys_mr_exit1;
 576
 577         /* successful reregistration */
 578         if (mr_rereg_mask & IB_MR_REREG_PD)
 579                 mr->pd = pd;
 580         mr->lkey = tmp_lkey;
 581         mr->rkey = tmp_rkey;
 582
 583 rereg_phys_mr_exit1:
 584         spin_unlock_irqrestore(&e_mr->mrlock, sl_flags);
 585 rereg_phys_mr_exit0:
 586         if (ret)
 587                 ehca_err(mr->device, "ret=%i mr=%p mr_rereg_mask=%x pd=%p "
 588                          "phys_buf_array=%p num_phys_buf=%x mr_access_flags=%x "
 589                          "iova_start=%p",
 590                          ret, mr, mr_rereg_mask, pd, phys_buf_array,
 591                          num_phys_buf, mr_access_flags, iova_start);
 592         return ret;
 593 } /* end ehca_rereg_phys_mr() */
 594
 595 /*----------------------------------------------------------------------*/
 596
 597 int ehca_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr)
 598 {
 599         int ret = 0;
 600         u64 h_ret;
 601         struct ehca_shca *shca =
 602                 container_of(mr->device, struct ehca_shca, ib_device);
 603         struct ehca_mr *e_mr = container_of(mr, struct ehca_mr, ib.ib_mr);
 604         unsigned long sl_flags;
 605         struct ehca_mr_hipzout_parms hipzout;
 606
 607         if ((e_mr->flags & EHCA_MR_FLAG_FMR)) {
 608                 ehca_err(mr->device, "not supported for FMR, mr=%p e_mr=%p "
 609                          "e_mr->flags=%x", mr, e_mr, e_mr->flags);
 610                 ret = -EINVAL;
 611                 goto query_mr_exit0;
 612         }
 613
 614         memset(mr_attr, 0, sizeof(struct ib_mr_attr));
 615         spin_lock_irqsave(&e_mr->mrlock, sl_flags);
 616
 617         h_ret = hipz_h_query_mr(shca->ipz_hca_handle, e_mr, &hipzout);
 618         if (h_ret != H_SUCCESS) {
 619                 ehca_err(mr->device, "hipz_mr_query failed, h_ret=%lli mr=%p "
 620                          "hca_hndl=%llx mr_hndl=%llx lkey=%x",
 621                          h_ret, mr, shca->ipz_hca_handle.handle,
 622                          e_mr->ipz_mr_handle.handle, mr->lkey);
 623                 ret = ehca2ib_return_code(h_ret);
 624                 goto query_mr_exit1;
 625         }
 626         mr_attr->pd = mr->pd;
 627         mr_attr->device_virt_addr = hipzout.vaddr;
 628         mr_attr->size = hipzout.len;
 629         mr_attr->lkey = hipzout.lkey;
 630         mr_attr->rkey = hipzout.rkey;
 631         ehca_mrmw_reverse_map_acl(&hipzout.acl, &mr_attr->mr_access_flags);
 632
 633 query_mr_exit1:
 634         spin_unlock_irqrestore(&e_mr->mrlock, sl_flags);
 635 query_mr_exit0:
 636         if (ret)
 637                 ehca_err(mr->device, "ret=%i mr=%p mr_attr=%p",
 638                          ret, mr, mr_attr);
 639         return ret;
 640 } /* end ehca_query_mr() */
 641
 642 /*----------------------------------------------------------------------*/
 643
 644 int ehca_dereg_mr(struct ib_mr *mr)
 645 {
 646         int ret = 0;
 647         u64 h_ret;
 648         struct ehca_shca *shca =
 649                 container_of(mr->device, struct ehca_shca, ib_device);
 650         struct ehca_mr *e_mr = container_of(mr, struct ehca_mr, ib.ib_mr);
 651
 652         if ((e_mr->flags & EHCA_MR_FLAG_FMR)) {
 653                 ehca_err(mr->device, "not supported for FMR, mr=%p e_mr=%p "
 654                          "e_mr->flags=%x", mr, e_mr, e_mr->flags);
 655                 ret = -EINVAL;
 656                 goto dereg_mr_exit0;
 657         } else if (e_mr == shca->maxmr) {
 658                 /* should be impossible, however reject to be sure */
 659                 ehca_err(mr->device, "dereg internal max-MR impossible, mr=%p "
 660                          "shca->maxmr=%p mr->lkey=%x",
 661                          mr, shca->maxmr, mr->lkey);
 662                 ret = -EINVAL;
 663                 goto dereg_mr_exit0;
 664         }
 665
 666         /* TODO: BUSY: MR still has bound window(s) */
 667         h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_mr);
 668         if (h_ret != H_SUCCESS) {
 669                 ehca_err(mr->device, "hipz_free_mr failed, h_ret=%lli shca=%p "
 670                          "e_mr=%p hca_hndl=%llx mr_hndl=%llx mr->lkey=%x",
 671                          h_ret, shca, e_mr, shca->ipz_hca_handle.handle,
 672                          e_mr->ipz_mr_handle.handle, mr->lkey);
 673                 ret = ehca2ib_return_code(h_ret);
 674                 goto dereg_mr_exit0;
 675         }
 676
 677         if (e_mr->umem)
 678                 ib_umem_release(e_mr->umem);
 679
 680         /* successful deregistration */
 681         ehca_mr_delete(e_mr);
 682
 683 dereg_mr_exit0:
 684         if (ret)
 685                 ehca_err(mr->device, "ret=%i mr=%p", ret, mr);
 686         return ret;
 687 } /* end ehca_dereg_mr() */
 688
 689 /*----------------------------------------------------------------------*/
 690
 691 struct ib_mw *ehca_alloc_mw(struct ib_pd *pd)
 692 {
 693         struct ib_mw *ib_mw;
 694         u64 h_ret;
 695         struct ehca_mw *e_mw;
 696         struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
 697         struct ehca_shca *shca =
 698                 container_of(pd->device, struct ehca_shca, ib_device);
 699         struct ehca_mw_hipzout_parms hipzout;
 700
 701         e_mw = ehca_mw_new();
 702         if (!e_mw) {
 703                 ib_mw = ERR_PTR(-ENOMEM);
 704                 goto alloc_mw_exit0;
 705         }
 706
 707         h_ret = hipz_h_alloc_resource_mw(shca->ipz_hca_handle, e_mw,
 708                                          e_pd->fw_pd, &hipzout);
 709         if (h_ret != H_SUCCESS) {
 710                 ehca_err(pd->device, "hipz_mw_allocate failed, h_ret=%lli "
 711                          "shca=%p hca_hndl=%llx mw=%p",
 712                          h_ret, shca, shca->ipz_hca_handle.handle, e_mw);
 713                 ib_mw = ERR_PTR(ehca2ib_return_code(h_ret));
 714                 goto alloc_mw_exit1;
 715         }
 716         /* successful MW allocation */
 717         e_mw->ipz_mw_handle = hipzout.handle;
 718         e_mw->ib_mw.rkey    = hipzout.rkey;
 719         return &e_mw->ib_mw;
 720
 721 alloc_mw_exit1:
 722         ehca_mw_delete(e_mw);
 723 alloc_mw_exit0:
 724         if (IS_ERR(ib_mw))
 725                 ehca_err(pd->device, "h_ret=%li pd=%p", PTR_ERR(ib_mw), pd);
 726         return ib_mw;
 727 } /* end ehca_alloc_mw() */
 728
 729 /*----------------------------------------------------------------------*/
 730
 731 int ehca_bind_mw(struct ib_qp *qp,
 732                  struct ib_mw *mw,
 733                  struct ib_mw_bind *mw_bind)
 734 {
 735         /* TODO: not supported up to now */
 736         ehca_gen_err("bind MW currently not supported by HCAD");
 737
 738         return -EPERM;
 739 } /* end ehca_bind_mw() */
 740
 741 /*----------------------------------------------------------------------*/
 742
 743 int ehca_dealloc_mw(struct ib_mw *mw)
 744 {
 745         u64 h_ret;
 746         struct ehca_shca *shca =
 747                 container_of(mw->device, struct ehca_shca, ib_device);
 748         struct ehca_mw *e_mw = container_of(mw, struct ehca_mw, ib_mw);
 749
 750         h_ret = hipz_h_free_resource_mw(shca->ipz_hca_handle, e_mw);
 751         if (h_ret != H_SUCCESS) {
 752                 ehca_err(mw->device, "hipz_free_mw failed, h_ret=%lli shca=%p "
 753                          "mw=%p rkey=%x hca_hndl=%llx mw_hndl=%llx",
 754                          h_ret, shca, mw, mw->rkey, shca->ipz_hca_handle.handle,
 755                          e_mw->ipz_mw_handle.handle);
 756                 return ehca2ib_return_code(h_ret);
 757         }
 758         /* successful deallocation */
 759         ehca_mw_delete(e_mw);
 760         return 0;
 761 } /* end ehca_dealloc_mw() */
 762
 763 /*----------------------------------------------------------------------*/
 764
 765 struct ib_fmr *ehca_alloc_fmr(struct ib_pd *pd,
 766                               int mr_access_flags,
 767                               struct ib_fmr_attr *fmr_attr)
 768 {
 769         struct ib_fmr *ib_fmr;
 770         struct ehca_shca *shca =
 771                 container_of(pd->device, struct ehca_shca, ib_device);
 772         struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
 773         struct ehca_mr *e_fmr;
 774         int ret;
 775         u32 tmp_lkey, tmp_rkey;
 776         struct ehca_mr_pginfo pginfo;
 777         u64 hw_pgsize;
 778
 779         /* check other parameters */
 780         if (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
 781              !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
 782             ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
 783              !(mr_access_flags & IB_ACCESS_LOCAL_WRITE))) {
 784                 /*
 785                  * Remote Write Access requires Local Write Access
 786                  * Remote Atomic Access requires Local Write Access
 787                  */
 788                 ehca_err(pd->device, "bad input values: mr_access_flags=%x",
 789                          mr_access_flags);
 790                 ib_fmr = ERR_PTR(-EINVAL);
 791                 goto alloc_fmr_exit0;
 792         }
 793         if (mr_access_flags & IB_ACCESS_MW_BIND) {
 794                 ehca_err(pd->device, "bad input values: mr_access_flags=%x",
 795                          mr_access_flags);
 796                 ib_fmr = ERR_PTR(-EINVAL);
 797                 goto alloc_fmr_exit0;
 798         }
 799         if ((fmr_attr->max_pages == 0) || (fmr_attr->max_maps == 0)) {
 800                 ehca_err(pd->device, "bad input values: fmr_attr->max_pages=%x "
 801                          "fmr_attr->max_maps=%x fmr_attr->page_shift=%x",
 802                          fmr_attr->max_pages, fmr_attr->max_maps,
 803                          fmr_attr->page_shift);
 804                 ib_fmr = ERR_PTR(-EINVAL);
 805                 goto alloc_fmr_exit0;
 806         }
 807
 808         hw_pgsize = 1 << fmr_attr->page_shift;
 809         if (!(hw_pgsize & shca->hca_cap_mr_pgsize)) {
 810                 ehca_err(pd->device, "unsupported fmr_attr->page_shift=%x",
 811                          fmr_attr->page_shift);
 812                 ib_fmr = ERR_PTR(-EINVAL);
 813                 goto alloc_fmr_exit0;
 814         }
 815
 816         e_fmr = ehca_mr_new();
 817         if (!e_fmr) {
 818                 ib_fmr = ERR_PTR(-ENOMEM);
 819                 goto alloc_fmr_exit0;
 820         }
 821         e_fmr->flags |= EHCA_MR_FLAG_FMR;
 822
 823         /* register MR on HCA */
 824         memset(&pginfo, 0, sizeof(pginfo));
 825         pginfo.hwpage_size = hw_pgsize;
 826         /*
 827          * pginfo.num_hwpages==0, ie register_rpages() will not be called
 828          * but deferred to map_phys_fmr()
 829          */
 830         ret = ehca_reg_mr(shca, e_fmr, NULL,
 831                           fmr_attr->max_pages * (1 << fmr_attr->page_shift),
 832                           mr_access_flags, e_pd, &pginfo,
 833                           &tmp_lkey, &tmp_rkey, EHCA_REG_MR);
 834         if (ret) {
 835                 ib_fmr = ERR_PTR(ret);
 836                 goto alloc_fmr_exit1;
 837         }
 838
 839         /* successful */
 840         e_fmr->hwpage_size = hw_pgsize;
 841         e_fmr->fmr_page_size = 1 << fmr_attr->page_shift;
 842         e_fmr->fmr_max_pages = fmr_attr->max_pages;
 843         e_fmr->fmr_max_maps = fmr_attr->max_maps;
 844         e_fmr->fmr_map_cnt = 0;
 845         return &e_fmr->ib.ib_fmr;
 846
 847 alloc_fmr_exit1:
 848         ehca_mr_delete(e_fmr);
 849 alloc_fmr_exit0:
 850         return ib_fmr;
 851 } /* end ehca_alloc_fmr() */
 852
 853 /*----------------------------------------------------------------------*/
 854
 855 int ehca_map_phys_fmr(struct ib_fmr *fmr,
 856                       u64 *page_list,
 857                       int list_len,
 858                       u64 iova)
 859 {
 860         int ret;
 861         struct ehca_shca *shca =
 862                 container_of(fmr->device, struct ehca_shca, ib_device);
 863         struct ehca_mr *e_fmr = container_of(fmr, struct ehca_mr, ib.ib_fmr);
 864         struct ehca_pd *e_pd = container_of(fmr->pd, struct ehca_pd, ib_pd);
 865         struct ehca_mr_pginfo pginfo;
 866         u32 tmp_lkey, tmp_rkey;
 867
 868         if (!(e_fmr->flags & EHCA_MR_FLAG_FMR)) {
 869                 ehca_err(fmr->device, "not a FMR, e_fmr=%p e_fmr->flags=%x",
 870                          e_fmr, e_fmr->flags);
 871                 ret = -EINVAL;
 872                 goto map_phys_fmr_exit0;
 873         }
 874         ret = ehca_fmr_check_page_list(e_fmr, page_list, list_len);
 875         if (ret)
 876                 goto map_phys_fmr_exit0;
 877         if (iova % e_fmr->fmr_page_size) {
 878                 /* only whole-numbered pages */
 879                 ehca_err(fmr->device, "bad iova, iova=%llx fmr_page_size=%x",
 880                          iova, e_fmr->fmr_page_size);
 881                 ret = -EINVAL;
 882                 goto map_phys_fmr_exit0;
 883         }
 884         if (e_fmr->fmr_map_cnt >= e_fmr->fmr_max_maps) {
 885                 /* HCAD does not limit the maps, however trace this anyway */
 886                 ehca_info(fmr->device, "map limit exceeded, fmr=%p "
 887                           "e_fmr->fmr_map_cnt=%x e_fmr->fmr_max_maps=%x",
 888                           fmr, e_fmr->fmr_map_cnt, e_fmr->fmr_max_maps);
 889         }
 890
 891         memset(&pginfo, 0, sizeof(pginfo));
 892         pginfo.type = EHCA_MR_PGI_FMR;
 893         pginfo.num_kpages = list_len;
 894         pginfo.hwpage_size = e_fmr->hwpage_size;
 895         pginfo.num_hwpages =
 896                 list_len * e_fmr->fmr_page_size / pginfo.hwpage_size;
 897         pginfo.u.fmr.page_list = page_list;
 898         pginfo.next_hwpage =
 899                 (iova & (e_fmr->fmr_page_size-1)) / pginfo.hwpage_size;
 900         pginfo.u.fmr.fmr_pgsize = e_fmr->fmr_page_size;
 901
 902         ret = ehca_rereg_mr(shca, e_fmr, (u64 *)iova,
 903                             list_len * e_fmr->fmr_page_size,
 904                             e_fmr->acl, e_pd, &pginfo, &tmp_lkey, &tmp_rkey);
 905         if (ret)
 906                 goto map_phys_fmr_exit0;
 907
 908         /* successful reregistration */
 909         e_fmr->fmr_map_cnt++;
 910         e_fmr->ib.ib_fmr.lkey = tmp_lkey;
 911         e_fmr->ib.ib_fmr.rkey = tmp_rkey;
 912         return 0;
 913
 914 map_phys_fmr_exit0:
 915         if (ret)
 916                 ehca_err(fmr->device, "ret=%i fmr=%p page_list=%p list_len=%x "
 917                          "iova=%llx", ret, fmr, page_list, list_len, iova);
 918         return ret;
 919 } /* end ehca_map_phys_fmr() */
 920
 921 /*----------------------------------------------------------------------*/
 922
 923 int ehca_unmap_fmr(struct list_head *fmr_list)
 924 {
 925         int ret = 0;
 926         struct ib_fmr *ib_fmr;
 927         struct ehca_shca *shca = NULL;
 928         struct ehca_shca *prev_shca;
 929         struct ehca_mr *e_fmr;
 930         u32 num_fmr = 0;
 931         u32 unmap_fmr_cnt = 0;
 932
 933         /* check all FMR belong to same SHCA, and check internal flag */
 934         list_for_each_entry(ib_fmr, fmr_list, list) {
 935                 prev_shca = shca;
 936                 shca = container_of(ib_fmr->device, struct ehca_shca,
 937                                     ib_device);
 938                 e_fmr = container_of(ib_fmr, struct ehca_mr, ib.ib_fmr);
 939                 if ((shca != prev_shca) && prev_shca) {
 940                         ehca_err(&shca->ib_device, "SHCA mismatch, shca=%p "
 941                                  "prev_shca=%p e_fmr=%p",
 942                                  shca, prev_shca, e_fmr);
 943                         ret = -EINVAL;
 944                         goto unmap_fmr_exit0;
 945                 }
 946                 if (!(e_fmr->flags & EHCA_MR_FLAG_FMR)) {
 947                         ehca_err(&shca->ib_device, "not a FMR, e_fmr=%p "
 948                                  "e_fmr->flags=%x", e_fmr, e_fmr->flags);
 949                         ret = -EINVAL;
 950                         goto unmap_fmr_exit0;
 951                 }
 952                 num_fmr++;
 953         }
 954
 955         /* loop over all FMRs to unmap */
 956         list_for_each_entry(ib_fmr, fmr_list, list) {
 957                 unmap_fmr_cnt++;
 958                 e_fmr = container_of(ib_fmr, struct ehca_mr, ib.ib_fmr);
 959                 shca = container_of(ib_fmr->device, struct ehca_shca,
 960                                     ib_device);
 961                 ret = ehca_unmap_one_fmr(shca, e_fmr);
 962                 if (ret) {
 963                         /* unmap failed, stop unmapping of rest of FMRs */
 964                         ehca_err(&shca->ib_device, "unmap of one FMR failed, "
 965                                  "stop rest, e_fmr=%p num_fmr=%x "
 966                                  "unmap_fmr_cnt=%x lkey=%x", e_fmr, num_fmr,
 967                                  unmap_fmr_cnt, e_fmr->ib.ib_fmr.lkey);
 968                         goto unmap_fmr_exit0;
 969                 }
 970         }
 971
 972 unmap_fmr_exit0:
 973         if (ret)
 974                 ehca_gen_err("ret=%i fmr_list=%p num_fmr=%x unmap_fmr_cnt=%x",
 975                              ret, fmr_list, num_fmr, unmap_fmr_cnt);
 976         return ret;
 977 } /* end ehca_unmap_fmr() */
 978
 979 /*----------------------------------------------------------------------*/
 980
 981 int ehca_dealloc_fmr(struct ib_fmr *fmr)
 982 {
 983         int ret;
 984         u64 h_ret;
 985         struct ehca_shca *shca =
 986                 container_of(fmr->device, struct ehca_shca, ib_device);
 987         struct ehca_mr *e_fmr = container_of(fmr, struct ehca_mr, ib.ib_fmr);
 988
 989         if (!(e_fmr->flags & EHCA_MR_FLAG_FMR)) {
 990                 ehca_err(fmr->device, "not a FMR, e_fmr=%p e_fmr->flags=%x",
 991                          e_fmr, e_fmr->flags);
 992                 ret = -EINVAL;
 993                 goto free_fmr_exit0;
 994         }
 995
 996         h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_fmr);
 997         if (h_ret != H_SUCCESS) {
 998                 ehca_err(fmr->device, "hipz_free_mr failed, h_ret=%lli e_fmr=%p "
 999                          "hca_hndl=%llx fmr_hndl=%llx fmr->lkey=%x",
1000                          h_ret, e_fmr, shca->ipz_hca_handle.handle,
1001                          e_fmr->ipz_mr_handle.handle, fmr->lkey);
1002                 ret = ehca2ib_return_code(h_ret);
1003                 goto free_fmr_exit0;
1004         }
1005         /* successful deregistration */
1006         ehca_mr_delete(e_fmr);
1007         return 0;
1008
1009 free_fmr_exit0:
1010         if (ret)
1011                 ehca_err(&shca->ib_device, "ret=%i fmr=%p", ret, fmr);
1012         return ret;
1013 } /* end ehca_dealloc_fmr() */
1014
1015 /*----------------------------------------------------------------------*/
1016
1017 static int ehca_reg_bmap_mr_rpages(struct ehca_shca *shca,
1018                                    struct ehca_mr *e_mr,
1019                                    struct ehca_mr_pginfo *pginfo);
1020
1021 int ehca_reg_mr(struct ehca_shca *shca,
1022                 struct ehca_mr *e_mr,
1023                 u64 *iova_start,
1024                 u64 size,
1025                 int acl,
1026                 struct ehca_pd *e_pd,
1027                 struct ehca_mr_pginfo *pginfo,
1028                 u32 *lkey, /*OUT*/
1029                 u32 *rkey, /*OUT*/
1030                 enum ehca_reg_type reg_type)
1031 {
1032         int ret;
1033         u64 h_ret;
1034         u32 hipz_acl;
1035         struct ehca_mr_hipzout_parms hipzout;
1036
1037         ehca_mrmw_map_acl(acl, &hipz_acl);
1038         ehca_mrmw_set_pgsize_hipz_acl(pginfo->hwpage_size, &hipz_acl);
1039         if (ehca_use_hp_mr == 1)
1040                 hipz_acl |= 0x00000001;
1041
1042         h_ret = hipz_h_alloc_resource_mr(shca->ipz_hca_handle, e_mr,
1043                                          (u64)iova_start, size, hipz_acl,
1044                                          e_pd->fw_pd, &hipzout);
1045         if (h_ret != H_SUCCESS) {
1046                 ehca_err(&shca->ib_device, "hipz_alloc_mr failed, h_ret=%lli "
1047                          "hca_hndl=%llx", h_ret, shca->ipz_hca_handle.handle);
1048                 ret = ehca2ib_return_code(h_ret);
1049                 goto ehca_reg_mr_exit0;
1050         }
1051
1052         e_mr->ipz_mr_handle = hipzout.handle;
1053
1054         if (reg_type == EHCA_REG_BUSMAP_MR)
1055                 ret = ehca_reg_bmap_mr_rpages(shca, e_mr, pginfo);
1056         else if (reg_type == EHCA_REG_MR)
1057                 ret = ehca_reg_mr_rpages(shca, e_mr, pginfo);
1058         else
1059                 ret = -EINVAL;
1060
1061         if (ret)
1062                 goto ehca_reg_mr_exit1;
1063
1064         /* successful registration */
1065         e_mr->num_kpages = pginfo->num_kpages;
1066         e_mr->num_hwpages = pginfo->num_hwpages;
1067         e_mr->hwpage_size = pginfo->hwpage_size;
1068         e_mr->start = iova_start;
1069         e_mr->size = size;
1070         e_mr->acl = acl;
1071         *lkey = hipzout.lkey;
1072         *rkey = hipzout.rkey;
1073         return 0;
1074
1075 ehca_reg_mr_exit1:
1076         h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_mr);
1077         if (h_ret != H_SUCCESS) {
1078                 ehca_err(&shca->ib_device, "h_ret=%lli shca=%p e_mr=%p "
1079                          "iova_start=%p size=%llx acl=%x e_pd=%p lkey=%x "
1080                          "pginfo=%p num_kpages=%llx num_hwpages=%llx ret=%i",
1081                          h_ret, shca, e_mr, iova_start, size, acl, e_pd,
1082                          hipzout.lkey, pginfo, pginfo->num_kpages,
1083                          pginfo->num_hwpages, ret);
1084                 ehca_err(&shca->ib_device, "internal error in ehca_reg_mr, "
1085                          "not recoverable");
1086         }
1087 ehca_reg_mr_exit0:
1088         if (ret)
1089                 ehca_err(&shca->ib_device, "ret=%i shca=%p e_mr=%p "
1090                          "iova_start=%p size=%llx acl=%x e_pd=%p pginfo=%p "
1091                          "num_kpages=%llx num_hwpages=%llx",
1092                          ret, shca, e_mr, iova_start, size, acl, e_pd, pginfo,
1093                          pginfo->num_kpages, pginfo->num_hwpages);
1094         return ret;
1095 } /* end ehca_reg_mr() */
1096
1097 /*----------------------------------------------------------------------*/
1098
1099 int ehca_reg_mr_rpages(struct ehca_shca *shca,
1100                        struct ehca_mr *e_mr,
1101                        struct ehca_mr_pginfo *pginfo)
1102 {
1103         int ret = 0;
1104         u64 h_ret;
1105         u32 rnum;
1106         u64 rpage;
1107         u32 i;
1108         u64 *kpage;
1109
1110         if (!pginfo->num_hwpages) /* in case of fmr */
1111                 return 0;
1112
1113         kpage = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
1114         if (!kpage) {
1115                 ehca_err(&shca->ib_device, "kpage alloc failed");
1116                 ret = -ENOMEM;
1117                 goto ehca_reg_mr_rpages_exit0;
1118         }
1119
1120         /* max MAX_RPAGES ehca mr pages per register call */
1121         for (i = 0; i < NUM_CHUNKS(pginfo->num_hwpages, MAX_RPAGES); i++) {
1122
1123                 if (i == NUM_CHUNKS(pginfo->num_hwpages, MAX_RPAGES) - 1) {
1124                         rnum = pginfo->num_hwpages % MAX_RPAGES; /* last shot */
1125                         if (rnum == 0)
1126                                 rnum = MAX_RPAGES;      /* last shot is full */
1127                 } else
1128                         rnum = MAX_RPAGES;
1129
1130                 ret = ehca_set_pagebuf(pginfo, rnum, kpage);
1131                 if (ret) {
1132                         ehca_err(&shca->ib_device, "ehca_set_pagebuf "
1133                                  "bad rc, ret=%i rnum=%x kpage=%p",
1134                                  ret, rnum, kpage);
1135                         goto ehca_reg_mr_rpages_exit1;
1136                 }
1137
1138                 if (rnum > 1) {
1139                         rpage = virt_to_abs(kpage);
1140                         if (!rpage) {
1141                                 ehca_err(&shca->ib_device, "kpage=%p i=%x",
1142                                          kpage, i);
1143                                 ret = -EFAULT;
1144                                 goto ehca_reg_mr_rpages_exit1;
1145                         }
1146                 } else
1147                         rpage = *kpage;
1148
1149                 h_ret = hipz_h_register_rpage_mr(
1150                         shca->ipz_hca_handle, e_mr,
1151                         ehca_encode_hwpage_size(pginfo->hwpage_size),
1152                         0, rpage, rnum);
1153
1154                 if (i == NUM_CHUNKS(pginfo->num_hwpages, MAX_RPAGES) - 1) {
1155                         /*
1156                          * check for 'registration complete'==H_SUCCESS
1157                          * and for 'page registered'==H_PAGE_REGISTERED
1158                          */
1159                         if (h_ret != H_SUCCESS) {
1160                                 ehca_err(&shca->ib_device, "last "
1161                                          "hipz_reg_rpage_mr failed, h_ret=%lli "
1162                                          "e_mr=%p i=%x hca_hndl=%llx mr_hndl=%llx"
1163                                          " lkey=%x", h_ret, e_mr, i,
1164                                          shca->ipz_hca_handle.handle,
1165                                          e_mr->ipz_mr_handle.handle,
1166                                          e_mr->ib.ib_mr.lkey);
1167                                 ret = ehca2ib_return_code(h_ret);
1168                                 break;
1169                         } else
1170                                 ret = 0;
1171                 } else if (h_ret != H_PAGE_REGISTERED) {
1172                         ehca_err(&shca->ib_device, "hipz_reg_rpage_mr failed, "
1173                                  "h_ret=%lli e_mr=%p i=%x lkey=%x hca_hndl=%llx "
1174                                  "mr_hndl=%llx", h_ret, e_mr, i,
1175                                  e_mr->ib.ib_mr.lkey,
1176                                  shca->ipz_hca_handle.handle,
1177                                  e_mr->ipz_mr_handle.handle);
1178                         ret = ehca2ib_return_code(h_ret);
1179                         break;
1180                 } else
1181                         ret = 0;
1182         } /* end for(i) */
1183
1184
1185 ehca_reg_mr_rpages_exit1:
1186         ehca_free_fw_ctrlblock(kpage);
1187 ehca_reg_mr_rpages_exit0:
1188         if (ret)
1189                 ehca_err(&shca->ib_device, "ret=%i shca=%p e_mr=%p pginfo=%p "
1190                          "num_kpages=%llx num_hwpages=%llx", ret, shca, e_mr,
1191                          pginfo, pginfo->num_kpages, pginfo->num_hwpages);
1192         return ret;
1193 } /* end ehca_reg_mr_rpages() */
1194
1195 /*----------------------------------------------------------------------*/
1196
1197 inline int ehca_rereg_mr_rereg1(struct ehca_shca *shca,
1198                                 struct ehca_mr *e_mr,
1199                                 u64 *iova_start,
1200                                 u64 size,
1201                                 u32 acl,
1202                                 struct ehca_pd *e_pd,
1203                                 struct ehca_mr_pginfo *pginfo,
1204                                 u32 *lkey, /*OUT*/
1205                                 u32 *rkey) /*OUT*/
1206 {
1207         int ret;
1208         u64 h_ret;
1209         u32 hipz_acl;
1210         u64 *kpage;
1211         u64 rpage;
1212         struct ehca_mr_pginfo pginfo_save;
1213         struct ehca_mr_hipzout_parms hipzout;
1214
1215         ehca_mrmw_map_acl(acl, &hipz_acl);
1216         ehca_mrmw_set_pgsize_hipz_acl(pginfo->hwpage_size, &hipz_acl);
1217
1218         kpage = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
1219         if (!kpage) {
1220                 ehca_err(&shca->ib_device, "kpage alloc failed");
1221                 ret = -ENOMEM;
1222                 goto ehca_rereg_mr_rereg1_exit0;
1223         }
1224
1225         pginfo_save = *pginfo;
1226         ret = ehca_set_pagebuf(pginfo, pginfo->num_hwpages, kpage);
1227         if (ret) {
1228                 ehca_err(&shca->ib_device, "set pagebuf failed, e_mr=%p "
1229                          "pginfo=%p type=%x num_kpages=%llx num_hwpages=%llx "
1230                          "kpage=%p", e_mr, pginfo, pginfo->type,
1231                          pginfo->num_kpages, pginfo->num_hwpages, kpage);
1232                 goto ehca_rereg_mr_rereg1_exit1;
1233         }
1234         rpage = virt_to_abs(kpage);
1235         if (!rpage) {
1236                 ehca_err(&shca->ib_device, "kpage=%p", kpage);
1237                 ret = -EFAULT;
1238                 goto ehca_rereg_mr_rereg1_exit1;
1239         }
1240         h_ret = hipz_h_reregister_pmr(shca->ipz_hca_handle, e_mr,
1241                                       (u64)iova_start, size, hipz_acl,
1242                                       e_pd->fw_pd, rpage, &hipzout);
1243         if (h_ret != H_SUCCESS) {
1244                 /*
1245                  * reregistration unsuccessful, try it again with the 3 hCalls,
1246                  * e.g. this is required in case H_MR_CONDITION
1247                  * (MW bound or MR is shared)
1248                  */
1249                 ehca_warn(&shca->ib_device, "hipz_h_reregister_pmr failed "
1250                           "(Rereg1), h_ret=%lli e_mr=%p", h_ret, e_mr);
1251                 *pginfo = pginfo_save;
1252                 ret = -EAGAIN;
1253         } else if ((u64 *)hipzout.vaddr != iova_start) {
1254                 ehca_err(&shca->ib_device, "PHYP changed iova_start in "
1255                          "rereg_pmr, iova_start=%p iova_start_out=%llx e_mr=%p "
1256                          "mr_handle=%llx lkey=%x lkey_out=%x", iova_start,
1257                          hipzout.vaddr, e_mr, e_mr->ipz_mr_handle.handle,
1258                          e_mr->ib.ib_mr.lkey, hipzout.lkey);
1259                 ret = -EFAULT;
1260         } else {
1261                 /*
1262                  * successful reregistration
1263                  * note: start and start_out are identical for eServer HCAs
1264                  */
1265                 e_mr->num_kpages = pginfo->num_kpages;
1266                 e_mr->num_hwpages = pginfo->num_hwpages;
1267                 e_mr->hwpage_size = pginfo->hwpage_size;
1268                 e_mr->start = iova_start;
1269                 e_mr->size = size;
1270                 e_mr->acl = acl;
1271                 *lkey = hipzout.lkey;
1272                 *rkey = hipzout.rkey;
1273         }
1274
1275 ehca_rereg_mr_rereg1_exit1:
1276         ehca_free_fw_ctrlblock(kpage);
1277 ehca_rereg_mr_rereg1_exit0:
1278         if ( ret && (ret != -EAGAIN) )
1279                 ehca_err(&shca->ib_device, "ret=%i lkey=%x rkey=%x "
1280                          "pginfo=%p num_kpages=%llx num_hwpages=%llx",
1281                          ret, *lkey, *rkey, pginfo, pginfo->num_kpages,
1282                          pginfo->num_hwpages);
1283         return ret;
1284 } /* end ehca_rereg_mr_rereg1() */
1285
1286 /*----------------------------------------------------------------------*/
1287
1288 int ehca_rereg_mr(struct ehca_shca *shca,
1289                   struct ehca_mr *e_mr,
1290                   u64 *iova_start,
1291                   u64 size,
1292                   int acl,
1293                   struct ehca_pd *e_pd,
1294                   struct ehca_mr_pginfo *pginfo,
1295                   u32 *lkey,
1296                   u32 *rkey)
1297 {
1298         int ret = 0;
1299         u64 h_ret;
1300         int rereg_1_hcall = 1; /* 1: use hipz_h_reregister_pmr directly */
1301         int rereg_3_hcall = 0; /* 1: use 3 hipz calls for reregistration */
1302
1303         /* first determine reregistration hCall(s) */
1304         if ((pginfo->num_hwpages > MAX_RPAGES) ||
1305             (e_mr->num_hwpages > MAX_RPAGES) ||
1306             (pginfo->num_hwpages > e_mr->num_hwpages)) {
1307                 ehca_dbg(&shca->ib_device, "Rereg3 case, "
1308                          "pginfo->num_hwpages=%llx e_mr->num_hwpages=%x",
1309                          pginfo->num_hwpages, e_mr->num_hwpages);
1310                 rereg_1_hcall = 0;
1311                 rereg_3_hcall = 1;
1312         }
1313
1314         if (e_mr->flags & EHCA_MR_FLAG_MAXMR) { /* check for max-MR */
1315                 rereg_1_hcall = 0;
1316                 rereg_3_hcall = 1;
1317                 e_mr->flags &= ~EHCA_MR_FLAG_MAXMR;
1318                 ehca_err(&shca->ib_device, "Rereg MR for max-MR! e_mr=%p",
1319                          e_mr);
1320         }
1321
1322         if (rereg_1_hcall) {
1323                 ret = ehca_rereg_mr_rereg1(shca, e_mr, iova_start, size,
1324                                            acl, e_pd, pginfo, lkey, rkey);
1325                 if (ret) {
1326                         if (ret == -EAGAIN)
1327                                 rereg_3_hcall = 1;
1328                         else
1329                                 goto ehca_rereg_mr_exit0;
1330                 }
1331         }
1332
1333         if (rereg_3_hcall) {
1334                 struct ehca_mr save_mr;
1335
1336                 /* first deregister old MR */
1337                 h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_mr);
1338                 if (h_ret != H_SUCCESS) {
1339                         ehca_err(&shca->ib_device, "hipz_free_mr failed, "
1340                                  "h_ret=%lli e_mr=%p hca_hndl=%llx mr_hndl=%llx "
1341                                  "mr->lkey=%x",
1342                                  h_ret, e_mr, shca->ipz_hca_handle.handle,
1343                                  e_mr->ipz_mr_handle.handle,
1344                                  e_mr->ib.ib_mr.lkey);
1345                         ret = ehca2ib_return_code(h_ret);
1346                         goto ehca_rereg_mr_exit0;
1347                 }
1348                 /* clean ehca_mr_t, without changing struct ib_mr and lock */
1349                 save_mr = *e_mr;
1350                 ehca_mr_deletenew(e_mr);
1351
1352                 /* set some MR values */
1353                 e_mr->flags = save_mr.flags;
1354                 e_mr->hwpage_size = save_mr.hwpage_size;
1355                 e_mr->fmr_page_size = save_mr.fmr_page_size;
1356                 e_mr->fmr_max_pages = save_mr.fmr_max_pages;
1357                 e_mr->fmr_max_maps = save_mr.fmr_max_maps;
1358                 e_mr->fmr_map_cnt = save_mr.fmr_map_cnt;
1359
1360                 ret = ehca_reg_mr(shca, e_mr, iova_start, size, acl,
1361                                   e_pd, pginfo, lkey, rkey, EHCA_REG_MR);
1362                 if (ret) {
1363                         u32 offset = (u64)(&e_mr->flags) - (u64)e_mr;
1364                         memcpy(&e_mr->flags, &(save_mr.flags),
1365                                sizeof(struct ehca_mr) - offset);
1366                         goto ehca_rereg_mr_exit0;
1367                 }
1368         }
1369
1370 ehca_rereg_mr_exit0:
1371         if (ret)
1372                 ehca_err(&shca->ib_device, "ret=%i shca=%p e_mr=%p "
1373                          "iova_start=%p size=%llx acl=%x e_pd=%p pginfo=%p "
1374                          "num_kpages=%llx lkey=%x rkey=%x rereg_1_hcall=%x "
1375                          "rereg_3_hcall=%x", ret, shca, e_mr, iova_start, size,
1376                          acl, e_pd, pginfo, pginfo->num_kpages, *lkey, *rkey,
1377                          rereg_1_hcall, rereg_3_hcall);
1378         return ret;
1379 } /* end ehca_rereg_mr() */
1380
1381 /*----------------------------------------------------------------------*/
1382
1383 int ehca_unmap_one_fmr(struct ehca_shca *shca,
1384                        struct ehca_mr *e_fmr)
1385 {
1386         int ret = 0;
1387         u64 h_ret;
1388         struct ehca_pd *e_pd =
1389                 container_of(e_fmr->ib.ib_fmr.pd, struct ehca_pd, ib_pd);
1390         struct ehca_mr save_fmr;
1391         u32 tmp_lkey, tmp_rkey;
1392         struct ehca_mr_pginfo pginfo;
1393         struct ehca_mr_hipzout_parms hipzout;
1394         struct ehca_mr save_mr;
1395
1396         if (e_fmr->fmr_max_pages <= MAX_RPAGES) {
1397                 /*
1398                  * note: after using rereg hcall with len=0,
1399                  * rereg hcall must be used again for registering pages
1400                  */
1401                 h_ret = hipz_h_reregister_pmr(shca->ipz_hca_handle, e_fmr, 0,
1402                                               0, 0, e_pd->fw_pd, 0, &hipzout);
1403                 if (h_ret == H_SUCCESS) {
1404                         /* successful reregistration */
1405                         e_fmr->start = NULL;
1406                         e_fmr->size = 0;
1407                         tmp_lkey = hipzout.lkey;
1408                         tmp_rkey = hipzout.rkey;
1409                         return 0;
1410                 }
1411                 /*
1412                  * should not happen, because length checked above,
1413                  * FMRs are not shared and no MW bound to FMRs
1414                  */
1415                 ehca_err(&shca->ib_device, "hipz_reregister_pmr failed "
1416                          "(Rereg1), h_ret=%lli e_fmr=%p hca_hndl=%llx "
1417                          "mr_hndl=%llx lkey=%x lkey_out=%x",
1418                          h_ret, e_fmr, shca->ipz_hca_handle.handle,
1419                          e_fmr->ipz_mr_handle.handle,
1420                          e_fmr->ib.ib_fmr.lkey, hipzout.lkey);
1421                 /* try free and rereg */
1422         }
1423
1424         /* first free old FMR */
1425         h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_fmr);
1426         if (h_ret != H_SUCCESS) {
1427                 ehca_err(&shca->ib_device, "hipz_free_mr failed, "
1428                          "h_ret=%lli e_fmr=%p hca_hndl=%llx mr_hndl=%llx "
1429                          "lkey=%x",
1430                          h_ret, e_fmr, shca->ipz_hca_handle.handle,
1431                          e_fmr->ipz_mr_handle.handle,
1432                          e_fmr->ib.ib_fmr.lkey);
1433                 ret = ehca2ib_return_code(h_ret);
1434                 goto ehca_unmap_one_fmr_exit0;
1435         }
1436         /* clean ehca_mr_t, without changing lock */
1437         save_fmr = *e_fmr;
1438         ehca_mr_deletenew(e_fmr);
1439
1440         /* set some MR values */
1441         e_fmr->flags = save_fmr.flags;
1442         e_fmr->hwpage_size = save_fmr.hwpage_size;
1443         e_fmr->fmr_page_size = save_fmr.fmr_page_size;
1444         e_fmr->fmr_max_pages = save_fmr.fmr_max_pages;
1445         e_fmr->fmr_max_maps = save_fmr.fmr_max_maps;
1446         e_fmr->fmr_map_cnt = save_fmr.fmr_map_cnt;
1447         e_fmr->acl = save_fmr.acl;
1448
1449         memset(&pginfo, 0, sizeof(pginfo));
1450         pginfo.type = EHCA_MR_PGI_FMR;
1451         ret = ehca_reg_mr(shca, e_fmr, NULL,
1452                           (e_fmr->fmr_max_pages * e_fmr->fmr_page_size),
1453                           e_fmr->acl, e_pd, &pginfo, &tmp_lkey,
1454                           &tmp_rkey, EHCA_REG_MR);
1455         if (ret) {
1456                 u32 offset = (u64)(&e_fmr->flags) - (u64)e_fmr;
1457                 memcpy(&e_fmr->flags, &(save_mr.flags),
1458                        sizeof(struct ehca_mr) - offset);
1459         }
1460
1461 ehca_unmap_one_fmr_exit0:
1462         if (ret)
1463                 ehca_err(&shca->ib_device, "ret=%i tmp_lkey=%x tmp_rkey=%x "
1464                          "fmr_max_pages=%x",
1465                          ret, tmp_lkey, tmp_rkey, e_fmr->fmr_max_pages);
1466         return ret;
1467 } /* end ehca_unmap_one_fmr() */
1468
1469 /*----------------------------------------------------------------------*/
1470
1471 int ehca_reg_smr(struct ehca_shca *shca,
1472                  struct ehca_mr *e_origmr,
1473                  struct ehca_mr *e_newmr,
1474                  u64 *iova_start,
1475                  int acl,
1476                  struct ehca_pd *e_pd,
1477                  u32 *lkey, /*OUT*/
1478                  u32 *rkey) /*OUT*/
1479 {
1480         int ret = 0;
1481         u64 h_ret;
1482         u32 hipz_acl;
1483         struct ehca_mr_hipzout_parms hipzout;
1484
1485         ehca_mrmw_map_acl(acl, &hipz_acl);
1486         ehca_mrmw_set_pgsize_hipz_acl(e_origmr->hwpage_size, &hipz_acl);
1487
1488         h_ret = hipz_h_register_smr(shca->ipz_hca_handle, e_newmr, e_origmr,
1489                                     (u64)iova_start, hipz_acl, e_pd->fw_pd,
1490                                     &hipzout);
1491         if (h_ret != H_SUCCESS) {
1492                 ehca_err(&shca->ib_device, "hipz_reg_smr failed, h_ret=%lli "
1493                          "shca=%p e_origmr=%p e_newmr=%p iova_start=%p acl=%x "
1494                          "e_pd=%p hca_hndl=%llx mr_hndl=%llx lkey=%x",
1495                          h_ret, shca, e_origmr, e_newmr, iova_start, acl, e_pd,
1496                          shca->ipz_hca_handle.handle,
1497                          e_origmr->ipz_mr_handle.handle,
1498                          e_origmr->ib.ib_mr.lkey);
1499                 ret = ehca2ib_return_code(h_ret);
1500                 goto ehca_reg_smr_exit0;
1501         }
1502         /* successful registration */
1503         e_newmr->num_kpages = e_origmr->num_kpages;
1504         e_newmr->num_hwpages = e_origmr->num_hwpages;
1505         e_newmr->hwpage_size   = e_origmr->hwpage_size;
1506         e_newmr->start = iova_start;
1507         e_newmr->size = e_origmr->size;
1508         e_newmr->acl = acl;
1509         e_newmr->ipz_mr_handle = hipzout.handle;
1510         *lkey = hipzout.lkey;
1511         *rkey = hipzout.rkey;
1512         return 0;
1513
1514 ehca_reg_smr_exit0:
1515         if (ret)
1516                 ehca_err(&shca->ib_device, "ret=%i shca=%p e_origmr=%p "
1517                          "e_newmr=%p iova_start=%p acl=%x e_pd=%p",
1518                          ret, shca, e_origmr, e_newmr, iova_start, acl, e_pd);
1519         return ret;
1520 } /* end ehca_reg_smr() */
1521
1522 /*----------------------------------------------------------------------*/
1523 static inline void *ehca_calc_sectbase(int top, int dir, int idx)
1524 {
1525         unsigned long ret = idx;
1526         ret |= dir << EHCA_DIR_INDEX_SHIFT;
1527         ret |= top << EHCA_TOP_INDEX_SHIFT;
1528         return abs_to_virt(ret << SECTION_SIZE_BITS);
1529 }
1530
1531 #define ehca_bmap_valid(entry) \
1532         ((u64)entry != (u64)EHCA_INVAL_ADDR)
1533
1534 static u64 ehca_reg_mr_section(int top, int dir, int idx, u64 *kpage,
1535                                struct ehca_shca *shca, struct ehca_mr *mr,
1536                                struct ehca_mr_pginfo *pginfo)
1537 {
1538         u64 h_ret = 0;
1539         unsigned long page = 0;
1540         u64 rpage = virt_to_abs(kpage);
1541         int page_count;
1542
1543         void *sectbase = ehca_calc_sectbase(top, dir, idx);
1544         if ((unsigned long)sectbase & (pginfo->hwpage_size - 1)) {
1545                 ehca_err(&shca->ib_device, "reg_mr_section will probably fail:"
1546                                            "hwpage_size does not fit to "
1547                                            "section start address");
1548         }
1549         page_count = EHCA_SECTSIZE / pginfo->hwpage_size;
1550
1551         while (page < page_count) {
1552                 u64 rnum;
1553                 for (rnum = 0; (rnum < MAX_RPAGES) && (page < page_count);
1554                      rnum++) {
1555                         void *pg = sectbase + ((page++) * pginfo->hwpage_size);
1556                         kpage[rnum] = virt_to_abs(pg);
1557                 }
1558
1559                 h_ret = hipz_h_register_rpage_mr(shca->ipz_hca_handle, mr,
1560                         ehca_encode_hwpage_size(pginfo->hwpage_size),
1561                         0, rpage, rnum);
1562
1563                 if ((h_ret != H_SUCCESS) && (h_ret != H_PAGE_REGISTERED)) {
1564                         ehca_err(&shca->ib_device, "register_rpage_mr failed");
1565                         return h_ret;
1566                 }
1567         }
1568         return h_ret;
1569 }
1570
1571 static u64 ehca_reg_mr_sections(int top, int dir, u64 *kpage,
1572                                 struct ehca_shca *shca, struct ehca_mr *mr,
1573                                 struct ehca_mr_pginfo *pginfo)
1574 {
1575         u64 hret = H_SUCCESS;
1576         int idx;
1577
1578         for (idx = 0; idx < EHCA_MAP_ENTRIES; idx++) {
1579                 if (!ehca_bmap_valid(ehca_bmap->top[top]->dir[dir]->ent[idx]))
1580                         continue;
1581
1582                 hret = ehca_reg_mr_section(top, dir, idx, kpage, shca, mr,
1583                                            pginfo);
1584                 if ((hret != H_SUCCESS) && (hret != H_PAGE_REGISTERED))
1585                                 return hret;
1586         }
1587         return hret;
1588 }
1589
1590 static u64 ehca_reg_mr_dir_sections(int top, u64 *kpage, struct ehca_shca *shca,
1591                                     struct ehca_mr *mr,
1592                                     struct ehca_mr_pginfo *pginfo)
1593 {
1594         u64 hret = H_SUCCESS;
1595         int dir;
1596
1597         for (dir = 0; dir < EHCA_MAP_ENTRIES; dir++) {
1598                 if (!ehca_bmap_valid(ehca_bmap->top[top]->dir[dir]))
1599                         continue;
1600
1601                 hret = ehca_reg_mr_sections(top, dir, kpage, shca, mr, pginfo);
1602                 if ((hret != H_SUCCESS) && (hret != H_PAGE_REGISTERED))
1603                                 return hret;
1604         }
1605         return hret;
1606 }
1607
1608 /* register internal max-MR to internal SHCA */
1609 int ehca_reg_internal_maxmr(
1610         struct ehca_shca *shca,
1611         struct ehca_pd *e_pd,
1612         struct ehca_mr **e_maxmr)  /*OUT*/
1613 {
1614         int ret;
1615         struct ehca_mr *e_mr;
1616         u64 *iova_start;
1617         u64 size_maxmr;
1618         struct ehca_mr_pginfo pginfo;
1619         struct ib_phys_buf ib_pbuf;
1620         u32 num_kpages;
1621         u32 num_hwpages;
1622         u64 hw_pgsize;
1623
1624         if (!ehca_bmap) {
1625                 ret = -EFAULT;
1626                 goto ehca_reg_internal_maxmr_exit0;
1627         }
1628
1629         e_mr = ehca_mr_new();
1630         if (!e_mr) {
1631                 ehca_err(&shca->ib_device, "out of memory");
1632                 ret = -ENOMEM;
1633                 goto ehca_reg_internal_maxmr_exit0;
1634         }
1635         e_mr->flags |= EHCA_MR_FLAG_MAXMR;
1636
1637         /* register internal max-MR on HCA */
1638         size_maxmr = ehca_mr_len;
1639         iova_start = (u64 *)ehca_map_vaddr((void *)KERNELBASE);
1640         ib_pbuf.addr = 0;
1641         ib_pbuf.size = size_maxmr;
1642         num_kpages = NUM_CHUNKS(((u64)iova_start % PAGE_SIZE) + size_maxmr,
1643                                 PAGE_SIZE);
1644         hw_pgsize = ehca_get_max_hwpage_size(shca);
1645         num_hwpages = NUM_CHUNKS(((u64)iova_start % hw_pgsize) + size_maxmr,
1646                                  hw_pgsize);
1647
1648         memset(&pginfo, 0, sizeof(pginfo));
1649         pginfo.type = EHCA_MR_PGI_PHYS;
1650         pginfo.num_kpages = num_kpages;
1651         pginfo.num_hwpages = num_hwpages;
1652         pginfo.hwpage_size = hw_pgsize;
1653         pginfo.u.phy.num_phys_buf = 1;
1654         pginfo.u.phy.phys_buf_array = &ib_pbuf;
1655
1656         ret = ehca_reg_mr(shca, e_mr, iova_start, size_maxmr, 0, e_pd,
1657                           &pginfo, &e_mr->ib.ib_mr.lkey,
1658                           &e_mr->ib.ib_mr.rkey, EHCA_REG_BUSMAP_MR);
1659         if (ret) {
1660                 ehca_err(&shca->ib_device, "reg of internal max MR failed, "
1661                          "e_mr=%p iova_start=%p size_maxmr=%llx num_kpages=%x "
1662                          "num_hwpages=%x", e_mr, iova_start, size_maxmr,
1663                          num_kpages, num_hwpages);
1664                 goto ehca_reg_internal_maxmr_exit1;
1665         }
1666
1667         /* successful registration of all pages */
1668         e_mr->ib.ib_mr.device = e_pd->ib_pd.device;
1669         e_mr->ib.ib_mr.pd = &e_pd->ib_pd;
1670         e_mr->ib.ib_mr.uobject = NULL;
1671         atomic_inc(&(e_pd->ib_pd.usecnt));
1672         atomic_set(&(e_mr->ib.ib_mr.usecnt), 0);
1673         *e_maxmr = e_mr;
1674         return 0;
1675
1676 ehca_reg_internal_maxmr_exit1:
1677         ehca_mr_delete(e_mr);
1678 ehca_reg_internal_maxmr_exit0:
1679         if (ret)
1680                 ehca_err(&shca->ib_device, "ret=%i shca=%p e_pd=%p e_maxmr=%p",
1681                          ret, shca, e_pd, e_maxmr);
1682         return ret;
1683 } /* end ehca_reg_internal_maxmr() */
1684
1685 /*----------------------------------------------------------------------*/
1686
1687 int ehca_reg_maxmr(struct ehca_shca *shca,
1688                    struct ehca_mr *e_newmr,
1689                    u64 *iova_start,
1690                    int acl,
1691                    struct ehca_pd *e_pd,
1692                    u32 *lkey,
1693                    u32 *rkey)
1694 {
1695         u64 h_ret;
1696         struct ehca_mr *e_origmr = shca->maxmr;
1697         u32 hipz_acl;
1698         struct ehca_mr_hipzout_parms hipzout;
1699
1700         ehca_mrmw_map_acl(acl, &hipz_acl);
1701         ehca_mrmw_set_pgsize_hipz_acl(e_origmr->hwpage_size, &hipz_acl);
1702
1703         h_ret = hipz_h_register_smr(shca->ipz_hca_handle, e_newmr, e_origmr,
1704                                     (u64)iova_start, hipz_acl, e_pd->fw_pd,
1705                                     &hipzout);
1706         if (h_ret != H_SUCCESS) {
1707                 ehca_err(&shca->ib_device, "hipz_reg_smr failed, h_ret=%lli "
1708                          "e_origmr=%p hca_hndl=%llx mr_hndl=%llx lkey=%x",
1709                          h_ret, e_origmr, shca->ipz_hca_handle.handle,
1710                          e_origmr->ipz_mr_handle.handle,
1711                          e_origmr->ib.ib_mr.lkey);
1712                 return ehca2ib_return_code(h_ret);
1713         }
1714         /* successful registration */
1715         e_newmr->num_kpages = e_origmr->num_kpages;
1716         e_newmr->num_hwpages = e_origmr->num_hwpages;
1717         e_newmr->hwpage_size = e_origmr->hwpage_size;
1718         e_newmr->start = iova_start;
1719         e_newmr->size = e_origmr->size;
1720         e_newmr->acl = acl;
1721         e_newmr->ipz_mr_handle = hipzout.handle;
1722         *lkey = hipzout.lkey;
1723         *rkey = hipzout.rkey;
1724         return 0;
1725 } /* end ehca_reg_maxmr() */
1726
1727 /*----------------------------------------------------------------------*/
1728
1729 int ehca_dereg_internal_maxmr(struct ehca_shca *shca)
1730 {
1731         int ret;
1732         struct ehca_mr *e_maxmr;
1733         struct ib_pd *ib_pd;
1734
1735         if (!shca->maxmr) {
1736                 ehca_err(&shca->ib_device, "bad call, shca=%p", shca);
1737                 ret = -EINVAL;
1738                 goto ehca_dereg_internal_maxmr_exit0;
1739         }
1740
1741         e_maxmr = shca->maxmr;
1742         ib_pd = e_maxmr->ib.ib_mr.pd;
1743         shca->maxmr = NULL; /* remove internal max-MR indication from SHCA */
1744
1745         ret = ehca_dereg_mr(&e_maxmr->ib.ib_mr);
1746         if (ret) {
1747                 ehca_err(&shca->ib_device, "dereg internal max-MR failed, "
1748                          "ret=%i e_maxmr=%p shca=%p lkey=%x",
1749                          ret, e_maxmr, shca, e_maxmr->ib.ib_mr.lkey);
1750                 shca->maxmr = e_maxmr;
1751                 goto ehca_dereg_internal_maxmr_exit0;
1752         }
1753
1754         atomic_dec(&ib_pd->usecnt);
1755
1756 ehca_dereg_internal_maxmr_exit0:
1757         if (ret)
1758                 ehca_err(&shca->ib_device, "ret=%i shca=%p shca->maxmr=%p",
1759                          ret, shca, shca->maxmr);
1760         return ret;
1761 } /* end ehca_dereg_internal_maxmr() */
1762
1763 /*----------------------------------------------------------------------*/
1764
1765 /*
1766  * check physical buffer array of MR verbs for validness and
1767  * calculates MR size
1768  */
1769 int ehca_mr_chk_buf_and_calc_size(struct ib_phys_buf *phys_buf_array,
1770                                   int num_phys_buf,
1771                                   u64 *iova_start,
1772                                   u64 *size)
1773 {
1774         struct ib_phys_buf *pbuf = phys_buf_array;
1775         u64 size_count = 0;
1776         u32 i;
1777
1778         if (num_phys_buf == 0) {
1779                 ehca_gen_err("bad phys buf array len, num_phys_buf=0");
1780                 return -EINVAL;
1781         }
1782         /* check first buffer */
1783         if (((u64)iova_start & ~PAGE_MASK) != (pbuf->addr & ~PAGE_MASK)) {
1784                 ehca_gen_err("iova_start/addr mismatch, iova_start=%p "
1785                              "pbuf->addr=%llx pbuf->size=%llx",
1786                              iova_start, pbuf->addr, pbuf->size);
1787                 return -EINVAL;
1788         }
1789         if (((pbuf->addr + pbuf->size) % PAGE_SIZE) &&
1790             (num_phys_buf > 1)) {
1791                 ehca_gen_err("addr/size mismatch in 1st buf, pbuf->addr=%llx "
1792                              "pbuf->size=%llx", pbuf->addr, pbuf->size);
1793                 return -EINVAL;
1794         }
1795
1796         for (i = 0; i < num_phys_buf; i++) {
1797                 if ((i > 0) && (pbuf->addr % PAGE_SIZE)) {
1798                         ehca_gen_err("bad address, i=%x pbuf->addr=%llx "
1799                                      "pbuf->size=%llx",
1800                                      i, pbuf->addr, pbuf->size);
1801                         return -EINVAL;
1802                 }
1803                 if (((i > 0) && /* not 1st */
1804                      (i < (num_phys_buf - 1)) &&        /* not last */
1805                      (pbuf->size % PAGE_SIZE)) || (pbuf->size == 0)) {
1806                         ehca_gen_err("bad size, i=%x pbuf->size=%llx",
1807                                      i, pbuf->size);
1808                         return -EINVAL;
1809                 }
1810                 size_count += pbuf->size;
1811                 pbuf++;
1812         }
1813
1814         *size = size_count;
1815         return 0;
1816 } /* end ehca_mr_chk_buf_and_calc_size() */
1817
1818 /*----------------------------------------------------------------------*/
1819
1820 /* check page list of map FMR verb for validness */
1821 int ehca_fmr_check_page_list(struct ehca_mr *e_fmr,
1822                              u64 *page_list,
1823                              int list_len)
1824 {
1825         u32 i;
1826         u64 *page;
1827
1828         if ((list_len == 0) || (list_len > e_fmr->fmr_max_pages)) {
1829                 ehca_gen_err("bad list_len, list_len=%x "
1830                              "e_fmr->fmr_max_pages=%x fmr=%p",
1831                              list_len, e_fmr->fmr_max_pages, e_fmr);
1832                 return -EINVAL;
1833         }
1834
1835         /* each page must be aligned */
1836         page = page_list;
1837         for (i = 0; i < list_len; i++) {
1838                 if (*page % e_fmr->fmr_page_size) {
1839                         ehca_gen_err("bad page, i=%x *page=%llx page=%p fmr=%p "
1840                                      "fmr_page_size=%x", i, *page, page, e_fmr,
1841                                      e_fmr->fmr_page_size);
1842                         return -EINVAL;
1843                 }
1844                 page++;
1845         }
1846
1847         return 0;
1848 } /* end ehca_fmr_check_page_list() */
1849
1850 /*----------------------------------------------------------------------*/
1851
1852 /* PAGE_SIZE >= pginfo->hwpage_size */
1853 static int ehca_set_pagebuf_user1(struct ehca_mr_pginfo *pginfo,
1854                                   u32 number,
1855                                   u64 *kpage)
1856 {
1857         int ret = 0;
1858         struct ib_umem_chunk *prev_chunk;
1859         struct ib_umem_chunk *chunk;
1860         u64 pgaddr;
1861         u32 i = 0;
1862         u32 j = 0;
1863         int hwpages_per_kpage = PAGE_SIZE / pginfo->hwpage_size;
1864
1865         /* loop over desired chunk entries */
1866         chunk      = pginfo->u.usr.next_chunk;
1867         prev_chunk = pginfo->u.usr.next_chunk;
1868         list_for_each_entry_continue(
1869                 chunk, (&(pginfo->u.usr.region->chunk_list)), list) {
1870                 for (i = pginfo->u.usr.next_nmap; i < chunk->nmap; ) {
1871                         pgaddr = page_to_pfn(sg_page(&chunk->page_list[i]))
1872                                 << PAGE_SHIFT ;
1873                         *kpage = phys_to_abs(pgaddr +
1874                                              (pginfo->next_hwpage *
1875                                               pginfo->hwpage_size));
1876                         if ( !(*kpage) ) {
1877                                 ehca_gen_err("pgaddr=%llx "
1878                                              "chunk->page_list[i]=%llx "
1879                                              "i=%x next_hwpage=%llx",
1880                                              pgaddr, (u64)sg_dma_address(
1881                                                      &chunk->page_list[i]),
1882                                              i, pginfo->next_hwpage);
1883                                 return -EFAULT;
1884                         }
1885                         (pginfo->hwpage_cnt)++;
1886                         (pginfo->next_hwpage)++;
1887                         kpage++;
1888                         if (pginfo->next_hwpage % hwpages_per_kpage == 0) {
1889                                 (pginfo->kpage_cnt)++;
1890                                 (pginfo->u.usr.next_nmap)++;
1891                                 pginfo->next_hwpage = 0;
1892                                 i++;
1893                         }
1894                         j++;
1895                         if (j >= number) break;
1896                 }
1897                 if ((pginfo->u.usr.next_nmap >= chunk->nmap) &&
1898                     (j >= number)) {
1899                         pginfo->u.usr.next_nmap = 0;
1900                         prev_chunk = chunk;
1901                         break;
1902                 } else if (pginfo->u.usr.next_nmap >= chunk->nmap) {
1903                         pginfo->u.usr.next_nmap = 0;
1904                         prev_chunk = chunk;
1905                 } else if (j >= number)
1906                         break;
1907                 else
1908                         prev_chunk = chunk;
1909         }
1910         pginfo->u.usr.next_chunk =
1911                 list_prepare_entry(prev_chunk,
1912                                    (&(pginfo->u.usr.region->chunk_list)),
1913                                    list);
1914         return ret;
1915 }
1916
1917 /*
1918  * check given pages for contiguous layout
1919  * last page addr is returned in prev_pgaddr for further check
1920  */
1921 static int ehca_check_kpages_per_ate(struct scatterlist *page_list,
1922                                      int start_idx, int end_idx,
1923                                      u64 *prev_pgaddr)
1924 {
1925         int t;
1926         for (t = start_idx; t <= end_idx; t++) {
1927                 u64 pgaddr = page_to_pfn(sg_page(&page_list[t])) << PAGE_SHIFT;
1928                 if (ehca_debug_level >= 3)
1929                         ehca_gen_dbg("chunk_page=%llx value=%016llx", pgaddr,
1930                                      *(u64 *)abs_to_virt(phys_to_abs(pgaddr)));
1931                 if (pgaddr - PAGE_SIZE != *prev_pgaddr) {
1932                         ehca_gen_err("uncontiguous page found pgaddr=%llx "
1933                                      "prev_pgaddr=%llx page_list_i=%x",
1934                                      pgaddr, *prev_pgaddr, t);
1935                         return -EINVAL;
1936                 }
1937                 *prev_pgaddr = pgaddr;
1938         }
1939         return 0;
1940 }
1941
1942 /* PAGE_SIZE < pginfo->hwpage_size */
1943 static int ehca_set_pagebuf_user2(struct ehca_mr_pginfo *pginfo,
1944                                   u32 number,
1945                                   u64 *kpage)
1946 {
1947         int ret = 0;
1948         struct ib_umem_chunk *prev_chunk;
1949         struct ib_umem_chunk *chunk;
1950         u64 pgaddr, prev_pgaddr;
1951         u32 i = 0;
1952         u32 j = 0;
1953         int kpages_per_hwpage = pginfo->hwpage_size / PAGE_SIZE;
1954         int nr_kpages = kpages_per_hwpage;
1955
1956         /* loop over desired chunk entries */
1957         chunk      = pginfo->u.usr.next_chunk;
1958         prev_chunk = pginfo->u.usr.next_chunk;
1959         list_for_each_entry_continue(
1960                 chunk, (&(pginfo->u.usr.region->chunk_list)), list) {
1961                 for (i = pginfo->u.usr.next_nmap; i < chunk->nmap; ) {
1962                         if (nr_kpages == kpages_per_hwpage) {
1963                                 pgaddr = ( page_to_pfn(sg_page(&chunk->page_list[i]))
1964                                            << PAGE_SHIFT );
1965                                 *kpage = phys_to_abs(pgaddr);
1966                                 if ( !(*kpage) ) {
1967                                         ehca_gen_err("pgaddr=%llx i=%x",
1968                                                      pgaddr, i);
1969                                         ret = -EFAULT;
1970                                         return ret;
1971                                 }
1972                                 /*
1973                                  * The first page in a hwpage must be aligned;
1974                                  * the first MR page is exempt from this rule.
1975                                  */
1976                                 if (pgaddr & (pginfo->hwpage_size - 1)) {
1977                                         if (pginfo->hwpage_cnt) {
1978                                                 ehca_gen_err(
1979                                                         "invalid alignment "
1980                                                         "pgaddr=%llx i=%x "
1981                                                         "mr_pgsize=%llx",
1982                                                         pgaddr, i,
1983                                                         pginfo->hwpage_size);
1984                                                 ret = -EFAULT;
1985                                                 return ret;
1986                                         }
1987                                         /* first MR page */
1988                                         pginfo->kpage_cnt =
1989                                                 (pgaddr &
1990                                                  (pginfo->hwpage_size - 1)) >>
1991                                                 PAGE_SHIFT;
1992                                         nr_kpages -= pginfo->kpage_cnt;
1993                                         *kpage = phys_to_abs(
1994                                                 pgaddr &
1995                                                 ~(pginfo->hwpage_size - 1));
1996                                 }
1997                                 if (ehca_debug_level >= 3) {
1998                                         u64 val = *(u64 *)abs_to_virt(
1999                                                 phys_to_abs(pgaddr));
2000                                         ehca_gen_dbg("kpage=%llx chunk_page=%llx "
2001                                                      "value=%016llx",
2002                                                      *kpage, pgaddr, val);
2003                                 }
2004                                 prev_pgaddr = pgaddr;
2005                                 i++;
2006                                 pginfo->kpage_cnt++;
2007                                 pginfo->u.usr.next_nmap++;
2008                                 nr_kpages--;
2009                                 if (!nr_kpages)
2010                                         goto next_kpage;
2011                                 continue;
2012                         }
2013                         if (i + nr_kpages > chunk->nmap) {
2014                                 ret = ehca_check_kpages_per_ate(
2015                                         chunk->page_list, i,
2016                                         chunk->nmap - 1, &prev_pgaddr);
2017                                 if (ret) return ret;
2018                                 pginfo->kpage_cnt += chunk->nmap - i;
2019                                 pginfo->u.usr.next_nmap += chunk->nmap - i;
2020                                 nr_kpages -= chunk->nmap - i;
2021                                 break;
2022                         }
2023
2024                         ret = ehca_check_kpages_per_ate(chunk->page_list, i,
2025                                                         i + nr_kpages - 1,
2026                                                         &prev_pgaddr);
2027                         if (ret) return ret;
2028                         i += nr_kpages;
2029                         pginfo->kpage_cnt += nr_kpages;
2030                         pginfo->u.usr.next_nmap += nr_kpages;
2031 next_kpage:
2032                         nr_kpages = kpages_per_hwpage;
2033                         (pginfo->hwpage_cnt)++;
2034                         kpage++;
2035                         j++;
2036                         if (j >= number) break;
2037                 }
2038                 if ((pginfo->u.usr.next_nmap >= chunk->nmap) &&
2039                     (j >= number)) {
2040                         pginfo->u.usr.next_nmap = 0;
2041                         prev_chunk = chunk;
2042                         break;
2043                 } else if (pginfo->u.usr.next_nmap >= chunk->nmap) {
2044                         pginfo->u.usr.next_nmap = 0;
2045                         prev_chunk = chunk;
2046                 } else if (j >= number)
2047                         break;
2048                 else
2049                         prev_chunk = chunk;
2050         }
2051         pginfo->u.usr.next_chunk =
2052                 list_prepare_entry(prev_chunk,
2053                                    (&(pginfo->u.usr.region->chunk_list)),
2054                                    list);
2055         return ret;
2056 }
2057
2058 static int ehca_set_pagebuf_phys(struct ehca_mr_pginfo *pginfo,
2059                                  u32 number, u64 *kpage)
2060 {
2061         int ret = 0;
2062         struct ib_phys_buf *pbuf;
2063         u64 num_hw, offs_hw;
2064         u32 i = 0;
2065
2066         /* loop over desired phys_buf_array entries */
2067         while (i < number) {
2068                 pbuf   = pginfo->u.phy.phys_buf_array + pginfo->u.phy.next_buf;
2069                 num_hw  = NUM_CHUNKS((pbuf->addr % pginfo->hwpage_size) +
2070                                      pbuf->size, pginfo->hwpage_size);
2071                 offs_hw = (pbuf->addr & ~(pginfo->hwpage_size - 1)) /
2072                         pginfo->hwpage_size;
2073                 while (pginfo->next_hwpage < offs_hw + num_hw) {
2074                         /* sanity check */
2075                         if ((pginfo->kpage_cnt >= pginfo->num_kpages) ||
2076                             (pginfo->hwpage_cnt >= pginfo->num_hwpages)) {
2077                                 ehca_gen_err("kpage_cnt >= num_kpages, "
2078                                              "kpage_cnt=%llx num_kpages=%llx "
2079                                              "hwpage_cnt=%llx "
2080                                              "num_hwpages=%llx i=%x",
2081                                              pginfo->kpage_cnt,
2082                                              pginfo->num_kpages,
2083                                              pginfo->hwpage_cnt,
2084                                              pginfo->num_hwpages, i);
2085                                 return -EFAULT;
2086                         }
2087                         *kpage = phys_to_abs(
2088                                 (pbuf->addr & ~(pginfo->hwpage_size - 1)) +
2089                                 (pginfo->next_hwpage * pginfo->hwpage_size));
2090                         if ( !(*kpage) && pbuf->addr ) {
2091                                 ehca_gen_err("pbuf->addr=%llx pbuf->size=%llx "
2092                                              "next_hwpage=%llx", pbuf->addr,
2093                                              pbuf->size, pginfo->next_hwpage);
2094                                 return -EFAULT;
2095                         }
2096                         (pginfo->hwpage_cnt)++;
2097                         (pginfo->next_hwpage)++;
2098                         if (PAGE_SIZE >= pginfo->hwpage_size) {
2099                                 if (pginfo->next_hwpage %
2100                                     (PAGE_SIZE / pginfo->hwpage_size) == 0)
2101                                         (pginfo->kpage_cnt)++;
2102                         } else
2103                                 pginfo->kpage_cnt += pginfo->hwpage_size /
2104                                         PAGE_SIZE;
2105                         kpage++;
2106                         i++;
2107                         if (i >= number) break;
2108                 }
2109                 if (pginfo->next_hwpage >= offs_hw + num_hw) {
2110                         (pginfo->u.phy.next_buf)++;
2111                         pginfo->next_hwpage = 0;
2112                 }
2113         }
2114         return ret;
2115 }
2116
2117 static int ehca_set_pagebuf_fmr(struct ehca_mr_pginfo *pginfo,
2118                                 u32 number, u64 *kpage)
2119 {
2120         int ret = 0;
2121         u64 *fmrlist;
2122         u32 i;
2123
2124         /* loop over desired page_list entries */
2125         fmrlist = pginfo->u.fmr.page_list + pginfo->u.fmr.next_listelem;
2126         for (i = 0; i < number; i++) {
2127                 *kpage = phys_to_abs((*fmrlist & ~(pginfo->hwpage_size - 1)) +
2128                                      pginfo->next_hwpage * pginfo->hwpage_size);
2129                 if ( !(*kpage) ) {
2130                         ehca_gen_err("*fmrlist=%llx fmrlist=%p "
2131                                      "next_listelem=%llx next_hwpage=%llx",
2132                                      *fmrlist, fmrlist,
2133                                      pginfo->u.fmr.next_listelem,
2134                                      pginfo->next_hwpage);
2135                         return -EFAULT;
2136                 }
2137                 (pginfo->hwpage_cnt)++;
2138                 if (pginfo->u.fmr.fmr_pgsize >= pginfo->hwpage_size) {
2139                         if (pginfo->next_hwpage %
2140                             (pginfo->u.fmr.fmr_pgsize /
2141                              pginfo->hwpage_size) == 0) {
2142                                 (pginfo->kpage_cnt)++;
2143                                 (pginfo->u.fmr.next_listelem)++;
2144                                 fmrlist++;
2145                                 pginfo->next_hwpage = 0;
2146                         } else
2147                                 (pginfo->next_hwpage)++;
2148                 } else {
2149                         unsigned int cnt_per_hwpage = pginfo->hwpage_size /
2150                                 pginfo->u.fmr.fmr_pgsize;
2151                         unsigned int j;
2152                         u64 prev = *kpage;
2153                         /* check if adrs are contiguous */
2154                         for (j = 1; j < cnt_per_hwpage; j++) {
2155                                 u64 p = phys_to_abs(fmrlist[j] &
2156                                                     ~(pginfo->hwpage_size - 1));
2157                                 if (prev + pginfo->u.fmr.fmr_pgsize != p) {
2158                                         ehca_gen_err("uncontiguous fmr pages "
2159                                                      "found prev=%llx p=%llx "
2160                                                      "idx=%x", prev, p, i + j);
2161                                         return -EINVAL;
2162                                 }
2163                                 prev = p;
2164                         }
2165                         pginfo->kpage_cnt += cnt_per_hwpage;
2166                         pginfo->u.fmr.next_listelem += cnt_per_hwpage;
2167                         fmrlist += cnt_per_hwpage;
2168                 }
2169                 kpage++;
2170         }
2171         return ret;
2172 }
2173
2174 /* setup page buffer from page info */
2175 int ehca_set_pagebuf(struct ehca_mr_pginfo *pginfo,
2176                      u32 number,
2177                      u64 *kpage)
2178 {
2179         int ret;
2180
2181         switch (pginfo->type) {
2182         case EHCA_MR_PGI_PHYS:
2183                 ret = ehca_set_pagebuf_phys(pginfo, number, kpage);
2184                 break;
2185         case EHCA_MR_PGI_USER:
2186                 ret = PAGE_SIZE >= pginfo->hwpage_size ?
2187                         ehca_set_pagebuf_user1(pginfo, number, kpage) :
2188                         ehca_set_pagebuf_user2(pginfo, number, kpage);
2189                 break;
2190         case EHCA_MR_PGI_FMR:
2191                 ret = ehca_set_pagebuf_fmr(pginfo, number, kpage);
2192                 break;
2193         default:
2194                 ehca_gen_err("bad pginfo->type=%x", pginfo->type);
2195                 ret = -EFAULT;
2196                 break;
2197         }
2198         return ret;
2199 } /* end ehca_set_pagebuf() */
2200
2201 /*----------------------------------------------------------------------*/
2202
2203 /*
2204  * check MR if it is a max-MR, i.e. uses whole memory
2205  * in case it's a max-MR 1 is returned, else 0
2206  */
2207 int ehca_mr_is_maxmr(u64 size,
2208                      u64 *iova_start)
2209 {
2210         /* a MR is treated as max-MR only if it fits following: */
2211         if ((size == ehca_mr_len) &&
2212             (iova_start == (void *)ehca_map_vaddr((void *)KERNELBASE))) {
2213                 ehca_gen_dbg("this is a max-MR");
2214                 return 1;
2215         } else
2216                 return 0;
2217 } /* end ehca_mr_is_maxmr() */
2218
2219 /*----------------------------------------------------------------------*/
2220
2221 /* map access control for MR/MW. This routine is used for MR and MW. */
2222 void ehca_mrmw_map_acl(int ib_acl,
2223                        u32 *hipz_acl)
2224 {
2225         *hipz_acl = 0;
2226         if (ib_acl & IB_ACCESS_REMOTE_READ)
2227                 *hipz_acl |= HIPZ_ACCESSCTRL_R_READ;
2228         if (ib_acl & IB_ACCESS_REMOTE_WRITE)
2229                 *hipz_acl |= HIPZ_ACCESSCTRL_R_WRITE;
2230         if (ib_acl & IB_ACCESS_REMOTE_ATOMIC)
2231                 *hipz_acl |= HIPZ_ACCESSCTRL_R_ATOMIC;
2232         if (ib_acl & IB_ACCESS_LOCAL_WRITE)
2233                 *hipz_acl |= HIPZ_ACCESSCTRL_L_WRITE;
2234         if (ib_acl & IB_ACCESS_MW_BIND)
2235                 *hipz_acl |= HIPZ_ACCESSCTRL_MW_BIND;
2236 } /* end ehca_mrmw_map_acl() */
2237
2238 /*----------------------------------------------------------------------*/
2239
2240 /* sets page size in hipz access control for MR/MW. */
2241 void ehca_mrmw_set_pgsize_hipz_acl(u32 pgsize, u32 *hipz_acl) /*INOUT*/
2242 {
2243         *hipz_acl |= (ehca_encode_hwpage_size(pgsize) << 24);
2244 } /* end ehca_mrmw_set_pgsize_hipz_acl() */
2245
2246 /*----------------------------------------------------------------------*/
2247
2248 /*
2249  * reverse map access control for MR/MW.
2250  * This routine is used for MR and MW.
2251  */
2252 void ehca_mrmw_reverse_map_acl(const u32 *hipz_acl,
2253                                int *ib_acl) /*OUT*/
2254 {
2255         *ib_acl = 0;
2256         if (*hipz_acl & HIPZ_ACCESSCTRL_R_READ)
2257                 *ib_acl |= IB_ACCESS_REMOTE_READ;
2258         if (*hipz_acl & HIPZ_ACCESSCTRL_R_WRITE)
2259                 *ib_acl |= IB_ACCESS_REMOTE_WRITE;
2260         if (*hipz_acl & HIPZ_ACCESSCTRL_R_ATOMIC)
2261                 *ib_acl |= IB_ACCESS_REMOTE_ATOMIC;
2262         if (*hipz_acl & HIPZ_ACCESSCTRL_L_WRITE)
2263                 *ib_acl |= IB_ACCESS_LOCAL_WRITE;
2264         if (*hipz_acl & HIPZ_ACCESSCTRL_MW_BIND)
2265                 *ib_acl |= IB_ACCESS_MW_BIND;
2266 } /* end ehca_mrmw_reverse_map_acl() */
2267
2268
2269 /*----------------------------------------------------------------------*/
2270
2271 /*
2272  * MR destructor and constructor
2273  * used in Reregister MR verb, sets all fields in ehca_mr_t to 0,
2274  * except struct ib_mr and spinlock
2275  */
2276 void ehca_mr_deletenew(struct ehca_mr *mr)
2277 {
2278         mr->flags = 0;
2279         mr->num_kpages = 0;
2280         mr->num_hwpages = 0;
2281         mr->acl = 0;
2282         mr->start = NULL;
2283         mr->fmr_page_size = 0;
2284         mr->fmr_max_pages = 0;
2285         mr->fmr_max_maps = 0;
2286         mr->fmr_map_cnt = 0;
2287         memset(&mr->ipz_mr_handle, 0, sizeof(mr->ipz_mr_handle));
2288         memset(&mr->galpas, 0, sizeof(mr->galpas));
2289 } /* end ehca_mr_deletenew() */
2290
2291 int ehca_init_mrmw_cache(void)
2292 {
2293         mr_cache = kmem_cache_create("ehca_cache_mr",
2294                                      sizeof(struct ehca_mr), 0,
2295                                      SLAB_HWCACHE_ALIGN,
2296                                      NULL);
2297         if (!mr_cache)
2298                 return -ENOMEM;
2299         mw_cache = kmem_cache_create("ehca_cache_mw",
2300                                      sizeof(struct ehca_mw), 0,
2301                                      SLAB_HWCACHE_ALIGN,
2302                                      NULL);
2303         if (!mw_cache) {
2304                 kmem_cache_destroy(mr_cache);
2305                 mr_cache = NULL;
2306                 return -ENOMEM;
2307         }
2308         return 0;
2309 }
2310
2311 void ehca_cleanup_mrmw_cache(void)
2312 {
2313         if (mr_cache)
2314                 kmem_cache_destroy(mr_cache);
2315         if (mw_cache)
2316                 kmem_cache_destroy(mw_cache);
2317 }
2318
2319 static inline int ehca_init_top_bmap(struct ehca_top_bmap *ehca_top_bmap,
2320                                      int dir)
2321 {
2322         if (!ehca_bmap_valid(ehca_top_bmap->dir[dir])) {
2323                 ehca_top_bmap->dir[dir] =
2324                         kmalloc(sizeof(struct ehca_dir_bmap), GFP_KERNEL);
2325                 if (!ehca_top_bmap->dir[dir])
2326                         return -ENOMEM;
2327                 /* Set map block to 0xFF according to EHCA_INVAL_ADDR */
2328                 memset(ehca_top_bmap->dir[dir], 0xFF, EHCA_ENT_MAP_SIZE);
2329         }
2330         return 0;
2331 }
2332
2333 static inline int ehca_init_bmap(struct ehca_bmap *ehca_bmap, int top, int dir)
2334 {
2335         if (!ehca_bmap_valid(ehca_bmap->top[top])) {
2336                 ehca_bmap->top[top] =
2337                         kmalloc(sizeof(struct ehca_top_bmap), GFP_KERNEL);
2338                 if (!ehca_bmap->top[top])
2339                         return -ENOMEM;
2340                 /* Set map block to 0xFF according to EHCA_INVAL_ADDR */
2341                 memset(ehca_bmap->top[top], 0xFF, EHCA_DIR_MAP_SIZE);
2342         }
2343         return ehca_init_top_bmap(ehca_bmap->top[top], dir);
2344 }
2345
2346 static inline int ehca_calc_index(unsigned long i, unsigned long s)
2347 {
2348         return (i >> s) & EHCA_INDEX_MASK;
2349 }
2350
2351 void ehca_destroy_busmap(void)
2352 {
2353         int top, dir;
2354
2355         if (!ehca_bmap)
2356                 return;
2357
2358         for (top = 0; top < EHCA_MAP_ENTRIES; top++) {
2359                 if (!ehca_bmap_valid(ehca_bmap->top[top]))
2360                         continue;
2361                 for (dir = 0; dir < EHCA_MAP_ENTRIES; dir++) {
2362                         if (!ehca_bmap_valid(ehca_bmap->top[top]->dir[dir]))
2363                                 continue;
2364
2365                         kfree(ehca_bmap->top[top]->dir[dir]);
2366                 }
2367
2368                 kfree(ehca_bmap->top[top]);
2369         }
2370
2371         kfree(ehca_bmap);
2372         ehca_bmap = NULL;
2373 }
2374
2375 static int ehca_update_busmap(unsigned long pfn, unsigned long nr_pages)
2376 {
2377         unsigned long i, start_section, end_section;
2378         int top, dir, idx;
2379
2380         if (!nr_pages)
2381                 return 0;
2382
2383         if (!ehca_bmap) {
2384                 ehca_bmap = kmalloc(sizeof(struct ehca_bmap), GFP_KERNEL);
2385                 if (!ehca_bmap)
2386                         return -ENOMEM;
2387                 /* Set map block to 0xFF according to EHCA_INVAL_ADDR */
2388                 memset(ehca_bmap, 0xFF, EHCA_TOP_MAP_SIZE);
2389         }
2390
2391         start_section = phys_to_abs(pfn * PAGE_SIZE) / EHCA_SECTSIZE;
2392         end_section = phys_to_abs((pfn + nr_pages) * PAGE_SIZE) / EHCA_SECTSIZE;
2393         for (i = start_section; i < end_section; i++) {
2394                 int ret;
2395                 top = ehca_calc_index(i, EHCA_TOP_INDEX_SHIFT);
2396                 dir = ehca_calc_index(i, EHCA_DIR_INDEX_SHIFT);
2397                 idx = i & EHCA_INDEX_MASK;
2398
2399                 ret = ehca_init_bmap(ehca_bmap, top, dir);
2400                 if (ret) {
2401                         ehca_destroy_busmap();
2402                         return ret;
2403                 }
2404                 ehca_bmap->top[top]->dir[dir]->ent[idx] = ehca_mr_len;
2405                 ehca_mr_len += EHCA_SECTSIZE;
2406         }
2407         return 0;
2408 }
2409
2410 static int ehca_is_hugepage(unsigned long pfn)
2411 {
2412         int page_order;
2413
2414         if (pfn & EHCA_HUGEPAGE_PFN_MASK)
2415                 return 0;
2416
2417         page_order = compound_order(pfn_to_page(pfn));
2418         if (page_order + PAGE_SHIFT != EHCA_HUGEPAGESHIFT)
2419                 return 0;
2420
2421         return 1;
2422 }
2423
2424 static int ehca_create_busmap_callback(unsigned long initial_pfn,
2425                                        unsigned long total_nr_pages, void *arg)
2426 {
2427         int ret;
2428         unsigned long pfn, start_pfn, end_pfn, nr_pages;
2429
2430         if ((total_nr_pages * PAGE_SIZE) < EHCA_HUGEPAGE_SIZE)
2431                 return ehca_update_busmap(initial_pfn, total_nr_pages);
2432
2433         /* Given chunk is >= 16GB -> check for hugepages */
2434         start_pfn = initial_pfn;
2435         end_pfn = initial_pfn + total_nr_pages;
2436         pfn = start_pfn;
2437
2438         while (pfn < end_pfn) {
2439                 if (ehca_is_hugepage(pfn)) {
2440                         /* Add mem found in front of the hugepage */
2441                         nr_pages = pfn - start_pfn;
2442                         ret = ehca_update_busmap(start_pfn, nr_pages);
2443                         if (ret)
2444                                 return ret;
2445                         /* Skip the hugepage */
2446                         pfn += (EHCA_HUGEPAGE_SIZE / PAGE_SIZE);
2447                         start_pfn = pfn;
2448                 } else
2449                         pfn += (EHCA_SECTSIZE / PAGE_SIZE);
2450         }
2451
2452         /* Add mem found behind the hugepage(s)  */
2453         nr_pages = pfn - start_pfn;
2454         return ehca_update_busmap(start_pfn, nr_pages);
2455 }
2456
2457 int ehca_create_busmap(void)
2458 {
2459         int ret;
2460
2461         ehca_mr_len = 0;
2462         ret = walk_system_ram_range(0, 1ULL << MAX_PHYSMEM_BITS, NULL,
2463                                    ehca_create_busmap_callback);
2464         return ret;
2465 }
2466
2467 static int ehca_reg_bmap_mr_rpages(struct ehca_shca *shca,
2468                                    struct ehca_mr *e_mr,
2469                                    struct ehca_mr_pginfo *pginfo)
2470 {
2471         int top;
2472         u64 hret, *kpage;
2473
2474         kpage = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
2475         if (!kpage) {
2476                 ehca_err(&shca->ib_device, "kpage alloc failed");
2477                 return -ENOMEM;
2478         }
2479         for (top = 0; top < EHCA_MAP_ENTRIES; top++) {
2480                 if (!ehca_bmap_valid(ehca_bmap->top[top]))
2481                         continue;
2482                 hret = ehca_reg_mr_dir_sections(top, kpage, shca, e_mr, pginfo);
2483                 if ((hret != H_PAGE_REGISTERED) && (hret != H_SUCCESS))
2484                         break;
2485         }
2486
2487         ehca_free_fw_ctrlblock(kpage);
2488
2489         if (hret == H_SUCCESS)
2490                 return 0; /* Everything is fine */
2491         else {
2492                 ehca_err(&shca->ib_device, "ehca_reg_bmap_mr_rpages failed, "
2493                                  "h_ret=%lli e_mr=%p top=%x lkey=%x "
2494                                  "hca_hndl=%llx mr_hndl=%llx", hret, e_mr, top,
2495                                  e_mr->ib.ib_mr.lkey,
2496                                  shca->ipz_hca_handle.handle,
2497                                  e_mr->ipz_mr_handle.handle);
2498                 return ehca2ib_return_code(hret);
2499         }
2500 }
2501
2502 static u64 ehca_map_vaddr(void *caddr)
2503 {
2504         int top, dir, idx;
2505         unsigned long abs_addr, offset;
2506         u64 entry;
2507
2508         if (!ehca_bmap)
2509                 return EHCA_INVAL_ADDR;
2510
2511         abs_addr = virt_to_abs(caddr);
2512         top = ehca_calc_index(abs_addr, EHCA_TOP_INDEX_SHIFT + EHCA_SECTSHIFT);
2513         if (!ehca_bmap_valid(ehca_bmap->top[top]))
2514                 return EHCA_INVAL_ADDR;
2515
2516         dir = ehca_calc_index(abs_addr, EHCA_DIR_INDEX_SHIFT + EHCA_SECTSHIFT);
2517         if (!ehca_bmap_valid(ehca_bmap->top[top]->dir[dir]))
2518                 return EHCA_INVAL_ADDR;
2519
2520         idx = ehca_calc_index(abs_addr, EHCA_SECTSHIFT);
2521
2522         entry = ehca_bmap->top[top]->dir[dir]->ent[idx];
2523         if (ehca_bmap_valid(entry)) {
2524                 offset = (unsigned long)caddr & (EHCA_SECTSIZE - 1);
2525                 return entry | offset;
2526         } else
2527                 return EHCA_INVAL_ADDR;
2528 }
2529
2530 static int ehca_dma_mapping_error(struct ib_device *dev, u64 dma_addr)
2531 {
2532         return dma_addr == EHCA_INVAL_ADDR;
2533 }
2534
2535 static u64 ehca_dma_map_single(struct ib_device *dev, void *cpu_addr,
2536                                size_t size, enum dma_data_direction direction)
2537 {
2538         if (cpu_addr)
2539                 return ehca_map_vaddr(cpu_addr);
2540         else
2541                 return EHCA_INVAL_ADDR;
2542 }
2543
2544 static void ehca_dma_unmap_single(struct ib_device *dev, u64 addr, size_t size,
2545                                   enum dma_data_direction direction)
2546 {
2547         /* This is only a stub; nothing to be done here */
2548 }
2549
2550 static u64 ehca_dma_map_page(struct ib_device *dev, struct page *page,
2551                              unsigned long offset, size_t size,
2552                              enum dma_data_direction direction)
2553 {
2554         u64 addr;
2555
2556         if (offset + size > PAGE_SIZE)
2557                 return EHCA_INVAL_ADDR;
2558
2559         addr = ehca_map_vaddr(page_address(page));
2560         if (!ehca_dma_mapping_error(dev, addr))
2561                 addr += offset;
2562
2563         return addr;
2564 }
2565
2566 static void ehca_dma_unmap_page(struct ib_device *dev, u64 addr, size_t size,
2567                                 enum dma_data_direction direction)
2568 {
2569         /* This is only a stub; nothing to be done here */
2570 }
2571
2572 static int ehca_dma_map_sg(struct ib_device *dev, struct scatterlist *sgl,
2573                            int nents, enum dma_data_direction direction)
2574 {
2575         struct scatterlist *sg;
2576         int i;
2577
2578         for_each_sg(sgl, sg, nents, i) {
2579                 u64 addr;
2580                 addr = ehca_map_vaddr(sg_virt(sg));
2581                 if (ehca_dma_mapping_error(dev, addr))
2582                         return 0;
2583
2584                 sg->dma_address = addr;
2585                 sg->dma_length = sg->length;
2586         }
2587         return nents;
2588 }
2589
2590 static void ehca_dma_unmap_sg(struct ib_device *dev, struct scatterlist *sg,
2591                               int nents, enum dma_data_direction direction)
2592 {
2593         /* This is only a stub; nothing to be done here */
2594 }
2595
2596 static u64 ehca_dma_address(struct ib_device *dev, struct scatterlist *sg)
2597 {
2598         return sg->dma_address;
2599 }
2600
2601 static unsigned int ehca_dma_len(struct ib_device *dev, struct scatterlist *sg)
2602 {
2603         return sg->length;
2604 }
2605
2606 static void ehca_dma_sync_single_for_cpu(struct ib_device *dev, u64 addr,
2607                                          size_t size,
2608                                          enum dma_data_direction dir)
2609 {
2610         dma_sync_single_for_cpu(dev->dma_device, addr, size, dir);
2611 }
2612
2613 static void ehca_dma_sync_single_for_device(struct ib_device *dev, u64 addr,
2614                                             size_t size,
2615                                             enum dma_data_direction dir)
2616 {
2617         dma_sync_single_for_device(dev->dma_device, addr, size, dir);
2618 }
2619
2620 static void *ehca_dma_alloc_coherent(struct ib_device *dev, size_t size,
2621                                      u64 *dma_handle, gfp_t flag)
2622 {
2623         struct page *p;
2624         void *addr = NULL;
2625         u64 dma_addr;
2626
2627         p = alloc_pages(flag, get_order(size));
2628         if (p) {
2629                 addr = page_address(p);
2630                 dma_addr = ehca_map_vaddr(addr);
2631                 if (ehca_dma_mapping_error(dev, dma_addr)) {
2632                         free_pages((unsigned long)addr, get_order(size));
2633                         return NULL;
2634                 }
2635                 if (dma_handle)
2636                         *dma_handle = dma_addr;
2637                 return addr;
2638         }
2639         return NULL;
2640 }
2641
2642 static void ehca_dma_free_coherent(struct ib_device *dev, size_t size,
2643                                    void *cpu_addr, u64 dma_handle)
2644 {
2645         if (cpu_addr && size)
2646                 free_pages((unsigned long)cpu_addr, get_order(size));
2647 }
2648
2649
2650 struct ib_dma_mapping_ops ehca_dma_mapping_ops = {
2651         .mapping_error          = ehca_dma_mapping_error,
2652         .map_single             = ehca_dma_map_single,
2653         .unmap_single           = ehca_dma_unmap_single,
2654         .map_page               = ehca_dma_map_page,
2655         .unmap_page             = ehca_dma_unmap_page,
2656         .map_sg                 = ehca_dma_map_sg,
2657         .unmap_sg               = ehca_dma_unmap_sg,
2658         .dma_address            = ehca_dma_address,
2659         .dma_len                = ehca_dma_len,
2660         .sync_single_for_cpu    = ehca_dma_sync_single_for_cpu,
2661         .sync_single_for_device = ehca_dma_sync_single_for_device,
2662         .alloc_coherent         = ehca_dma_alloc_coherent,
2663         .free_coherent          = ehca_dma_free_coherent,
2664 };