git.oblomov.eu Git - linux-2.6/blob - 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 <rdma/ib_umem.h>
  44
  45 #include "ehca_iverbs.h"
  46 #include "ehca_mrmw.h"
  47 #include "hcp_if.h"
  48 #include "hipz_hw.h"
  49
  50 #define NUM_CHUNKS(length, chunk_size) \
  51         (((length) + (chunk_size - 1)) / (chunk_size))
  52
  53 /* max number of rpages (per hcall register_rpages) */
  54 #define MAX_RPAGES 512
  55
  56 static struct kmem_cache *mr_cache;
  57 static struct kmem_cache *mw_cache;
  58
  59 enum ehca_mr_pgsize {
  60         EHCA_MR_PGSIZE4K  = 0x1000L,
  61         EHCA_MR_PGSIZE64K = 0x10000L,
  62         EHCA_MR_PGSIZE1M  = 0x100000L,
  63         EHCA_MR_PGSIZE16M = 0x1000000L
  64 };
  65
  66 #define EHCA_MR_PGSHIFT4K  12
  67 #define EHCA_MR_PGSHIFT64K 16
  68 #define EHCA_MR_PGSHIFT1M  20
  69 #define EHCA_MR_PGSHIFT16M 24
  70
  71 static u32 ehca_encode_hwpage_size(u32 pgsize)
  72 {
  73         int log = ilog2(pgsize);
  74         WARN_ON(log < 12 || log > 24 || log & 3);
  75         return (log - 12) / 4;
  76 }
  77
  78 static u64 ehca_get_max_hwpage_size(struct ehca_shca *shca)
  79 {
  80         return 1UL << ilog2(shca->hca_cap_mr_pgsize);
  81 }
  82
  83 static struct ehca_mr *ehca_mr_new(void)
  84 {
  85         struct ehca_mr *me;
  86
  87         me = kmem_cache_zalloc(mr_cache, GFP_KERNEL);
  88         if (me)
  89                 spin_lock_init(&me->mrlock);
  90         else
  91                 ehca_gen_err("alloc failed");
  92
  93         return me;
  94 }
  95
  96 static void ehca_mr_delete(struct ehca_mr *me)
  97 {
  98         kmem_cache_free(mr_cache, me);
  99 }
 100
 101 static struct ehca_mw *ehca_mw_new(void)
 102 {
 103         struct ehca_mw *me;
 104
 105         me = kmem_cache_zalloc(mw_cache, GFP_KERNEL);
 106         if (me)
 107                 spin_lock_init(&me->mwlock);
 108         else
 109                 ehca_gen_err("alloc failed");
 110
 111         return me;
 112 }
 113
 114 static void ehca_mw_delete(struct ehca_mw *me)
 115 {
 116         kmem_cache_free(mw_cache, me);
 117 }
 118
 119 /*----------------------------------------------------------------------*/
 120
 121 struct ib_mr *ehca_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
 122 {
 123         struct ib_mr *ib_mr;
 124         int ret;
 125         struct ehca_mr *e_maxmr;
 126         struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
 127         struct ehca_shca *shca =
 128                 container_of(pd->device, struct ehca_shca, ib_device);
 129
 130         if (shca->maxmr) {
 131                 e_maxmr = ehca_mr_new();
 132                 if (!e_maxmr) {
 133                         ehca_err(&shca->ib_device, "out of memory");
 134                         ib_mr = ERR_PTR(-ENOMEM);
 135                         goto get_dma_mr_exit0;
 136                 }
 137
 138                 ret = ehca_reg_maxmr(shca, e_maxmr, (u64 *)KERNELBASE,
 139                                      mr_access_flags, e_pd,
 140                                      &e_maxmr->ib.ib_mr.lkey,
 141                                      &e_maxmr->ib.ib_mr.rkey);
 142                 if (ret) {
 143                         ehca_mr_delete(e_maxmr);
 144                         ib_mr = ERR_PTR(ret);
 145                         goto get_dma_mr_exit0;
 146                 }
 147                 ib_mr = &e_maxmr->ib.ib_mr;
 148         } else {
 149                 ehca_err(&shca->ib_device, "no internal max-MR exist!");
 150                 ib_mr = ERR_PTR(-EINVAL);
 151                 goto get_dma_mr_exit0;
 152         }
 153
 154 get_dma_mr_exit0:
 155         if (IS_ERR(ib_mr))
 156                 ehca_err(&shca->ib_device, "h_ret=%li pd=%p mr_access_flags=%x",
 157                          PTR_ERR(ib_mr), pd, mr_access_flags);
 158         return ib_mr;
 159 } /* end ehca_get_dma_mr() */
 160
 161 /*----------------------------------------------------------------------*/
 162
 163 struct ib_mr *ehca_reg_phys_mr(struct ib_pd *pd,
 164                                struct ib_phys_buf *phys_buf_array,
 165                                int num_phys_buf,
 166                                int mr_access_flags,
 167                                u64 *iova_start)
 168 {
 169         struct ib_mr *ib_mr;
 170         int ret;
 171         struct ehca_mr *e_mr;
 172         struct ehca_shca *shca =
 173                 container_of(pd->device, struct ehca_shca, ib_device);
 174         struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
 175
 176         u64 size;
 177
 178         if ((num_phys_buf <= 0) || !phys_buf_array) {
 179                 ehca_err(pd->device, "bad input values: num_phys_buf=%x "
 180                          "phys_buf_array=%p", num_phys_buf, phys_buf_array);
 181                 ib_mr = ERR_PTR(-EINVAL);
 182                 goto reg_phys_mr_exit0;
 183         }
 184         if (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
 185              !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
 186             ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
 187              !(mr_access_flags & IB_ACCESS_LOCAL_WRITE))) {
 188                 /*
 189                  * Remote Write Access requires Local Write Access
 190                  * Remote Atomic Access requires Local Write Access
 191                  */
 192                 ehca_err(pd->device, "bad input values: mr_access_flags=%x",
 193                          mr_access_flags);
 194                 ib_mr = ERR_PTR(-EINVAL);
 195                 goto reg_phys_mr_exit0;
 196         }
 197
 198         /* check physical buffer list and calculate size */
 199         ret = ehca_mr_chk_buf_and_calc_size(phys_buf_array, num_phys_buf,
 200                                             iova_start, &size);
 201         if (ret) {
 202                 ib_mr = ERR_PTR(ret);
 203                 goto reg_phys_mr_exit0;
 204         }
 205         if ((size == 0) ||
 206             (((u64)iova_start + size) < (u64)iova_start)) {
 207                 ehca_err(pd->device, "bad input values: size=%lx iova_start=%p",
 208                          size, iova_start);
 209                 ib_mr = ERR_PTR(-EINVAL);
 210                 goto reg_phys_mr_exit0;
 211         }
 212
 213         e_mr = ehca_mr_new();
 214         if (!e_mr) {
 215                 ehca_err(pd->device, "out of memory");
 216                 ib_mr = ERR_PTR(-ENOMEM);
 217                 goto reg_phys_mr_exit0;
 218         }
 219
 220         /* register MR on HCA */
 221         if (ehca_mr_is_maxmr(size, iova_start)) {
 222                 e_mr->flags |= EHCA_MR_FLAG_MAXMR;
 223                 ret = ehca_reg_maxmr(shca, e_mr, iova_start, mr_access_flags,
 224                                      e_pd, &e_mr->ib.ib_mr.lkey,
 225                                      &e_mr->ib.ib_mr.rkey);
 226                 if (ret) {
 227                         ib_mr = ERR_PTR(ret);
 228                         goto reg_phys_mr_exit1;
 229                 }
 230         } else {
 231                 struct ehca_mr_pginfo pginfo;
 232                 u32 num_kpages;
 233                 u32 num_hwpages;
 234                 u64 hw_pgsize;
 235
 236                 num_kpages = NUM_CHUNKS(((u64)iova_start % PAGE_SIZE) + size,
 237                                         PAGE_SIZE);
 238                 /* for kernel space we try most possible pgsize */
 239                 hw_pgsize = ehca_get_max_hwpage_size(shca);
 240                 num_hwpages = NUM_CHUNKS(((u64)iova_start % hw_pgsize) + size,
 241                                          hw_pgsize);
 242                 memset(&pginfo, 0, sizeof(pginfo));
 243                 pginfo.type = EHCA_MR_PGI_PHYS;
 244                 pginfo.num_kpages = num_kpages;
 245                 pginfo.hwpage_size = hw_pgsize;
 246                 pginfo.num_hwpages = num_hwpages;
 247                 pginfo.u.phy.num_phys_buf = num_phys_buf;
 248                 pginfo.u.phy.phys_buf_array = phys_buf_array;
 249                 pginfo.next_hwpage =
 250                         ((u64)iova_start & ~PAGE_MASK) / hw_pgsize;
 251
 252                 ret = ehca_reg_mr(shca, e_mr, iova_start, size, mr_access_flags,
 253                                   e_pd, &pginfo, &e_mr->ib.ib_mr.lkey,
 254                                   &e_mr->ib.ib_mr.rkey);
 255                 if (ret) {
 256                         ib_mr = ERR_PTR(ret);
 257                         goto reg_phys_mr_exit1;
 258                 }
 259         }
 260
 261         /* successful registration of all pages */
 262         return &e_mr->ib.ib_mr;
 263
 264 reg_phys_mr_exit1:
 265         ehca_mr_delete(e_mr);
 266 reg_phys_mr_exit0:
 267         if (IS_ERR(ib_mr))
 268                 ehca_err(pd->device, "h_ret=%li pd=%p phys_buf_array=%p "
 269                          "num_phys_buf=%x mr_access_flags=%x iova_start=%p",
 270                          PTR_ERR(ib_mr), pd, phys_buf_array,
 271                          num_phys_buf, mr_access_flags, iova_start);
 272         return ib_mr;
 273 } /* end ehca_reg_phys_mr() */
 274
 275 /*----------------------------------------------------------------------*/
 276
 277 struct ib_mr *ehca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
 278                                u64 virt, int mr_access_flags,
 279                                struct ib_udata *udata)
 280 {
 281         struct ib_mr *ib_mr;
 282         struct ehca_mr *e_mr;
 283         struct ehca_shca *shca =
 284                 container_of(pd->device, struct ehca_shca, ib_device);
 285         struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
 286         struct ehca_mr_pginfo pginfo;
 287         int ret, page_shift;
 288         u32 num_kpages;
 289         u32 num_hwpages;
 290         u64 hwpage_size;
 291
 292         if (!pd) {
 293                 ehca_gen_err("bad pd=%p", pd);
 294                 return ERR_PTR(-EFAULT);
 295         }
 296
 297         if (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
 298              !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
 299             ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
 300              !(mr_access_flags & IB_ACCESS_LOCAL_WRITE))) {
 301                 /*
 302                  * Remote Write Access requires Local Write Access
 303                  * Remote Atomic Access requires Local Write Access
 304                  */
 305                 ehca_err(pd->device, "bad input values: mr_access_flags=%x",
 306                          mr_access_flags);
 307                 ib_mr = ERR_PTR(-EINVAL);
 308                 goto reg_user_mr_exit0;
 309         }
 310
 311         if (length == 0 || virt + length < virt) {
 312                 ehca_err(pd->device, "bad input values: length=%lx "
 313                          "virt_base=%lx", length, virt);
 314                 ib_mr = ERR_PTR(-EINVAL);
 315                 goto reg_user_mr_exit0;
 316         }
 317
 318         e_mr = ehca_mr_new();
 319         if (!e_mr) {
 320                 ehca_err(pd->device, "out of memory");
 321                 ib_mr = ERR_PTR(-ENOMEM);
 322                 goto reg_user_mr_exit0;
 323         }
 324
 325         e_mr->umem = ib_umem_get(pd->uobject->context, start, length,
 326                                  mr_access_flags, 0);
 327         if (IS_ERR(e_mr->umem)) {
 328                 ib_mr = (void *)e_mr->umem;
 329                 goto reg_user_mr_exit1;
 330         }
 331
 332         if (e_mr->umem->page_size != PAGE_SIZE) {
 333                 ehca_err(pd->device, "page size not supported, "
 334                          "e_mr->umem->page_size=%x", e_mr->umem->page_size);
 335                 ib_mr = ERR_PTR(-EINVAL);
 336                 goto reg_user_mr_exit2;
 337         }
 338
 339         /* determine number of MR pages */
 340         num_kpages = NUM_CHUNKS((virt % PAGE_SIZE) + length, PAGE_SIZE);
 341         /* select proper hw_pgsize */
 342         page_shift = PAGE_SHIFT;
 343         if (e_mr->umem->hugetlb) {
 344                 /* determine page_shift, clamp between 4K and 16M */
 345                 page_shift = (fls64(length - 1) + 3) & ~3;
 346                 page_shift = min(max(page_shift, EHCA_MR_PGSHIFT4K),
 347                                  EHCA_MR_PGSHIFT16M);
 348         }
 349         hwpage_size = 1UL << page_shift;
 350
 351         /* now that we have the desired page size, shift until it's
 352          * supported, too. 4K is always supported, so this terminates.
 353          */
 354         while (!(hwpage_size & shca->hca_cap_mr_pgsize))
 355                 hwpage_size >>= 4;
 356
 357 reg_user_mr_fallback:
 358         num_hwpages = NUM_CHUNKS((virt % hwpage_size) + length, hwpage_size);
 359         /* register MR on HCA */
 360         memset(&pginfo, 0, sizeof(pginfo));
 361         pginfo.type = EHCA_MR_PGI_USER;
 362         pginfo.hwpage_size = hwpage_size;
 363         pginfo.num_kpages = num_kpages;
 364         pginfo.num_hwpages = num_hwpages;
 365         pginfo.u.usr.region = e_mr->umem;
 366         pginfo.next_hwpage = e_mr->umem->offset / hwpage_size;
 367         pginfo.u.usr.next_chunk = list_prepare_entry(pginfo.u.usr.next_chunk,
 368                                                      (&e_mr->umem->chunk_list),
 369                                                      list);
 370
 371         ret = ehca_reg_mr(shca, e_mr, (u64 *)virt, length, mr_access_flags,
 372                           e_pd, &pginfo, &e_mr->ib.ib_mr.lkey,
 373                           &e_mr->ib.ib_mr.rkey);
 374         if (ret == -EINVAL && pginfo.hwpage_size > PAGE_SIZE) {
 375                 ehca_warn(pd->device, "failed to register mr "
 376                           "with hwpage_size=%lx", hwpage_size);
 377                 ehca_info(pd->device, "try to register mr with "
 378                           "kpage_size=%lx", PAGE_SIZE);
 379                 /*
 380                  * this means kpages are not contiguous for a hw page
 381                  * try kernel page size as fallback solution
 382                  */
 383                 hwpage_size = PAGE_SIZE;
 384                 goto reg_user_mr_fallback;
 385         }
 386         if (ret) {
 387                 ib_mr = ERR_PTR(ret);
 388                 goto reg_user_mr_exit2;
 389         }
 390
 391         /* successful registration of all pages */
 392         return &e_mr->ib.ib_mr;
 393
 394 reg_user_mr_exit2:
 395         ib_umem_release(e_mr->umem);
 396 reg_user_mr_exit1:
 397         ehca_mr_delete(e_mr);
 398 reg_user_mr_exit0:
 399         if (IS_ERR(ib_mr))
 400                 ehca_err(pd->device, "rc=%li pd=%p mr_access_flags=%x udata=%p",
 401                          PTR_ERR(ib_mr), pd, mr_access_flags, udata);
 402         return ib_mr;
 403 } /* end ehca_reg_user_mr() */
 404
 405 /*----------------------------------------------------------------------*/
 406
 407 int ehca_rereg_phys_mr(struct ib_mr *mr,
 408                        int mr_rereg_mask,
 409                        struct ib_pd *pd,
 410                        struct ib_phys_buf *phys_buf_array,
 411                        int num_phys_buf,
 412                        int mr_access_flags,
 413                        u64 *iova_start)
 414 {
 415         int ret;
 416
 417         struct ehca_shca *shca =
 418                 container_of(mr->device, struct ehca_shca, ib_device);
 419         struct ehca_mr *e_mr = container_of(mr, struct ehca_mr, ib.ib_mr);
 420         u64 new_size;
 421         u64 *new_start;
 422         u32 new_acl;
 423         struct ehca_pd *new_pd;
 424         u32 tmp_lkey, tmp_rkey;
 425         unsigned long sl_flags;
 426         u32 num_kpages = 0;
 427         u32 num_hwpages = 0;
 428         struct ehca_mr_pginfo pginfo;
 429
 430         if (!(mr_rereg_mask & IB_MR_REREG_TRANS)) {
 431                 /* TODO not supported, because PHYP rereg hCall needs pages */
 432                 ehca_err(mr->device, "rereg without IB_MR_REREG_TRANS not "
 433                          "supported yet, mr_rereg_mask=%x", mr_rereg_mask);
 434                 ret = -EINVAL;
 435                 goto rereg_phys_mr_exit0;
 436         }
 437
 438         if (mr_rereg_mask & IB_MR_REREG_PD) {
 439                 if (!pd) {
 440                         ehca_err(mr->device, "rereg with bad pd, pd=%p "
 441                                  "mr_rereg_mask=%x", pd, mr_rereg_mask);
 442                         ret = -EINVAL;
 443                         goto rereg_phys_mr_exit0;
 444                 }
 445         }
 446
 447         if ((mr_rereg_mask &
 448              ~(IB_MR_REREG_TRANS | IB_MR_REREG_PD | IB_MR_REREG_ACCESS)) ||
 449             (mr_rereg_mask == 0)) {
 450                 ret = -EINVAL;
 451                 goto rereg_phys_mr_exit0;
 452         }
 453
 454         /* check other parameters */
 455         if (e_mr == shca->maxmr) {
 456                 /* should be impossible, however reject to be sure */
 457                 ehca_err(mr->device, "rereg internal max-MR impossible, mr=%p "
 458                          "shca->maxmr=%p mr->lkey=%x",
 459                          mr, shca->maxmr, mr->lkey);
 460                 ret = -EINVAL;
 461                 goto rereg_phys_mr_exit0;
 462         }
 463         if (mr_rereg_mask & IB_MR_REREG_TRANS) { /* transl., i.e. addr/size */
 464                 if (e_mr->flags & EHCA_MR_FLAG_FMR) {
 465                         ehca_err(mr->device, "not supported for FMR, mr=%p "
 466                                  "flags=%x", mr, e_mr->flags);
 467                         ret = -EINVAL;
 468                         goto rereg_phys_mr_exit0;
 469                 }
 470                 if (!phys_buf_array || num_phys_buf <= 0) {
 471                         ehca_err(mr->device, "bad input values mr_rereg_mask=%x"
 472                                  " phys_buf_array=%p num_phys_buf=%x",
 473                                  mr_rereg_mask, phys_buf_array, num_phys_buf);
 474                         ret = -EINVAL;
 475                         goto rereg_phys_mr_exit0;
 476                 }
 477         }
 478         if ((mr_rereg_mask & IB_MR_REREG_ACCESS) &&     /* change ACL */
 479             (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
 480               !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
 481              ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
 482               !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)))) {
 483                 /*
 484                  * Remote Write Access requires Local Write Access
 485                  * Remote Atomic Access requires Local Write Access
 486                  */
 487                 ehca_err(mr->device, "bad input values: mr_rereg_mask=%x "
 488                          "mr_access_flags=%x", mr_rereg_mask, mr_access_flags);
 489                 ret = -EINVAL;
 490                 goto rereg_phys_mr_exit0;
 491         }
 492
 493         /* set requested values dependent on rereg request */
 494         spin_lock_irqsave(&e_mr->mrlock, sl_flags);
 495         new_start = e_mr->start;
 496         new_size = e_mr->size;
 497         new_acl = e_mr->acl;
 498         new_pd = container_of(mr->pd, struct ehca_pd, ib_pd);
 499
 500         if (mr_rereg_mask & IB_MR_REREG_TRANS) {
 501                 u64 hw_pgsize = ehca_get_max_hwpage_size(shca);
 502
 503                 new_start = iova_start; /* change address */
 504                 /* check physical buffer list and calculate size */
 505                 ret = ehca_mr_chk_buf_and_calc_size(phys_buf_array,
 506                                                     num_phys_buf, iova_start,
 507                                                     &new_size);
 508                 if (ret)
 509                         goto rereg_phys_mr_exit1;
 510                 if ((new_size == 0) ||
 511                     (((u64)iova_start + new_size) < (u64)iova_start)) {
 512                         ehca_err(mr->device, "bad input values: new_size=%lx "
 513                                  "iova_start=%p", new_size, iova_start);
 514                         ret = -EINVAL;
 515                         goto rereg_phys_mr_exit1;
 516                 }
 517                 num_kpages = NUM_CHUNKS(((u64)new_start % PAGE_SIZE) +
 518                                         new_size, PAGE_SIZE);
 519                 num_hwpages = NUM_CHUNKS(((u64)new_start % hw_pgsize) +
 520                                          new_size, hw_pgsize);
 521                 memset(&pginfo, 0, sizeof(pginfo));
 522                 pginfo.type = EHCA_MR_PGI_PHYS;
 523                 pginfo.num_kpages = num_kpages;
 524                 pginfo.hwpage_size = hw_pgsize;
 525                 pginfo.num_hwpages = num_hwpages;
 526                 pginfo.u.phy.num_phys_buf = num_phys_buf;
 527                 pginfo.u.phy.phys_buf_array = phys_buf_array;
 528                 pginfo.next_hwpage =
 529                         ((u64)iova_start & ~PAGE_MASK) / hw_pgsize;
 530         }
 531         if (mr_rereg_mask & IB_MR_REREG_ACCESS)
 532                 new_acl = mr_access_flags;
 533         if (mr_rereg_mask & IB_MR_REREG_PD)
 534                 new_pd = container_of(pd, struct ehca_pd, ib_pd);
 535
 536         ret = ehca_rereg_mr(shca, e_mr, new_start, new_size, new_acl,
 537                             new_pd, &pginfo, &tmp_lkey, &tmp_rkey);
 538         if (ret)
 539                 goto rereg_phys_mr_exit1;
 540
 541         /* successful reregistration */
 542         if (mr_rereg_mask & IB_MR_REREG_PD)
 543                 mr->pd = pd;
 544         mr->lkey = tmp_lkey;
 545         mr->rkey = tmp_rkey;
 546
 547 rereg_phys_mr_exit1:
 548         spin_unlock_irqrestore(&e_mr->mrlock, sl_flags);
 549 rereg_phys_mr_exit0:
 550         if (ret)
 551                 ehca_err(mr->device, "ret=%i mr=%p mr_rereg_mask=%x pd=%p "
 552                          "phys_buf_array=%p num_phys_buf=%x mr_access_flags=%x "
 553                          "iova_start=%p",
 554                          ret, mr, mr_rereg_mask, pd, phys_buf_array,
 555                          num_phys_buf, mr_access_flags, iova_start);
 556         return ret;
 557 } /* end ehca_rereg_phys_mr() */
 558
 559 /*----------------------------------------------------------------------*/
 560
 561 int ehca_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr)
 562 {
 563         int ret = 0;
 564         u64 h_ret;
 565         struct ehca_shca *shca =
 566                 container_of(mr->device, struct ehca_shca, ib_device);
 567         struct ehca_mr *e_mr = container_of(mr, struct ehca_mr, ib.ib_mr);
 568         unsigned long sl_flags;
 569         struct ehca_mr_hipzout_parms hipzout;
 570
 571         if ((e_mr->flags & EHCA_MR_FLAG_FMR)) {
 572                 ehca_err(mr->device, "not supported for FMR, mr=%p e_mr=%p "
 573                          "e_mr->flags=%x", mr, e_mr, e_mr->flags);
 574                 ret = -EINVAL;
 575                 goto query_mr_exit0;
 576         }
 577
 578         memset(mr_attr, 0, sizeof(struct ib_mr_attr));
 579         spin_lock_irqsave(&e_mr->mrlock, sl_flags);
 580
 581         h_ret = hipz_h_query_mr(shca->ipz_hca_handle, e_mr, &hipzout);
 582         if (h_ret != H_SUCCESS) {
 583                 ehca_err(mr->device, "hipz_mr_query failed, h_ret=%li mr=%p "
 584                          "hca_hndl=%lx mr_hndl=%lx lkey=%x",
 585                          h_ret, mr, shca->ipz_hca_handle.handle,
 586                          e_mr->ipz_mr_handle.handle, mr->lkey);
 587                 ret = ehca2ib_return_code(h_ret);
 588                 goto query_mr_exit1;
 589         }
 590         mr_attr->pd = mr->pd;
 591         mr_attr->device_virt_addr = hipzout.vaddr;
 592         mr_attr->size = hipzout.len;
 593         mr_attr->lkey = hipzout.lkey;
 594         mr_attr->rkey = hipzout.rkey;
 595         ehca_mrmw_reverse_map_acl(&hipzout.acl, &mr_attr->mr_access_flags);
 596
 597 query_mr_exit1:
 598         spin_unlock_irqrestore(&e_mr->mrlock, sl_flags);
 599 query_mr_exit0:
 600         if (ret)
 601                 ehca_err(mr->device, "ret=%i mr=%p mr_attr=%p",
 602                          ret, mr, mr_attr);
 603         return ret;
 604 } /* end ehca_query_mr() */
 605
 606 /*----------------------------------------------------------------------*/
 607
 608 int ehca_dereg_mr(struct ib_mr *mr)
 609 {
 610         int ret = 0;
 611         u64 h_ret;
 612         struct ehca_shca *shca =
 613                 container_of(mr->device, struct ehca_shca, ib_device);
 614         struct ehca_mr *e_mr = container_of(mr, struct ehca_mr, ib.ib_mr);
 615
 616         if ((e_mr->flags & EHCA_MR_FLAG_FMR)) {
 617                 ehca_err(mr->device, "not supported for FMR, mr=%p e_mr=%p "
 618                          "e_mr->flags=%x", mr, e_mr, e_mr->flags);
 619                 ret = -EINVAL;
 620                 goto dereg_mr_exit0;
 621         } else if (e_mr == shca->maxmr) {
 622                 /* should be impossible, however reject to be sure */
 623                 ehca_err(mr->device, "dereg internal max-MR impossible, mr=%p "
 624                          "shca->maxmr=%p mr->lkey=%x",
 625                          mr, shca->maxmr, mr->lkey);
 626                 ret = -EINVAL;
 627                 goto dereg_mr_exit0;
 628         }
 629
 630         /* TODO: BUSY: MR still has bound window(s) */
 631         h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_mr);
 632         if (h_ret != H_SUCCESS) {
 633                 ehca_err(mr->device, "hipz_free_mr failed, h_ret=%li shca=%p "
 634                          "e_mr=%p hca_hndl=%lx mr_hndl=%lx mr->lkey=%x",
 635                          h_ret, shca, e_mr, shca->ipz_hca_handle.handle,
 636                          e_mr->ipz_mr_handle.handle, mr->lkey);
 637                 ret = ehca2ib_return_code(h_ret);
 638                 goto dereg_mr_exit0;
 639         }
 640
 641         if (e_mr->umem)
 642                 ib_umem_release(e_mr->umem);
 643
 644         /* successful deregistration */
 645         ehca_mr_delete(e_mr);
 646
 647 dereg_mr_exit0:
 648         if (ret)
 649                 ehca_err(mr->device, "ret=%i mr=%p", ret, mr);
 650         return ret;
 651 } /* end ehca_dereg_mr() */
 652
 653 /*----------------------------------------------------------------------*/
 654
 655 struct ib_mw *ehca_alloc_mw(struct ib_pd *pd)
 656 {
 657         struct ib_mw *ib_mw;
 658         u64 h_ret;
 659         struct ehca_mw *e_mw;
 660         struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
 661         struct ehca_shca *shca =
 662                 container_of(pd->device, struct ehca_shca, ib_device);
 663         struct ehca_mw_hipzout_parms hipzout;
 664
 665         e_mw = ehca_mw_new();
 666         if (!e_mw) {
 667                 ib_mw = ERR_PTR(-ENOMEM);
 668                 goto alloc_mw_exit0;
 669         }
 670
 671         h_ret = hipz_h_alloc_resource_mw(shca->ipz_hca_handle, e_mw,
 672                                          e_pd->fw_pd, &hipzout);
 673         if (h_ret != H_SUCCESS) {
 674                 ehca_err(pd->device, "hipz_mw_allocate failed, h_ret=%li "
 675                          "shca=%p hca_hndl=%lx mw=%p",
 676                          h_ret, shca, shca->ipz_hca_handle.handle, e_mw);
 677                 ib_mw = ERR_PTR(ehca2ib_return_code(h_ret));
 678                 goto alloc_mw_exit1;
 679         }
 680         /* successful MW allocation */
 681         e_mw->ipz_mw_handle = hipzout.handle;
 682         e_mw->ib_mw.rkey    = hipzout.rkey;
 683         return &e_mw->ib_mw;
 684
 685 alloc_mw_exit1:
 686         ehca_mw_delete(e_mw);
 687 alloc_mw_exit0:
 688         if (IS_ERR(ib_mw))
 689                 ehca_err(pd->device, "h_ret=%li pd=%p", PTR_ERR(ib_mw), pd);
 690         return ib_mw;
 691 } /* end ehca_alloc_mw() */
 692
 693 /*----------------------------------------------------------------------*/
 694
 695 int ehca_bind_mw(struct ib_qp *qp,
 696                  struct ib_mw *mw,
 697                  struct ib_mw_bind *mw_bind)
 698 {
 699         /* TODO: not supported up to now */
 700         ehca_gen_err("bind MW currently not supported by HCAD");
 701
 702         return -EPERM;
 703 } /* end ehca_bind_mw() */
 704
 705 /*----------------------------------------------------------------------*/
 706
 707 int ehca_dealloc_mw(struct ib_mw *mw)
 708 {
 709         u64 h_ret;
 710         struct ehca_shca *shca =
 711                 container_of(mw->device, struct ehca_shca, ib_device);
 712         struct ehca_mw *e_mw = container_of(mw, struct ehca_mw, ib_mw);
 713
 714         h_ret = hipz_h_free_resource_mw(shca->ipz_hca_handle, e_mw);
 715         if (h_ret != H_SUCCESS) {
 716                 ehca_err(mw->device, "hipz_free_mw failed, h_ret=%li shca=%p "
 717                          "mw=%p rkey=%x hca_hndl=%lx mw_hndl=%lx",
 718                          h_ret, shca, mw, mw->rkey, shca->ipz_hca_handle.handle,
 719                          e_mw->ipz_mw_handle.handle);
 720                 return ehca2ib_return_code(h_ret);
 721         }
 722         /* successful deallocation */
 723         ehca_mw_delete(e_mw);
 724         return 0;
 725 } /* end ehca_dealloc_mw() */
 726
 727 /*----------------------------------------------------------------------*/
 728
 729 struct ib_fmr *ehca_alloc_fmr(struct ib_pd *pd,
 730                               int mr_access_flags,
 731                               struct ib_fmr_attr *fmr_attr)
 732 {
 733         struct ib_fmr *ib_fmr;
 734         struct ehca_shca *shca =
 735                 container_of(pd->device, struct ehca_shca, ib_device);
 736         struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
 737         struct ehca_mr *e_fmr;
 738         int ret;
 739         u32 tmp_lkey, tmp_rkey;
 740         struct ehca_mr_pginfo pginfo;
 741         u64 hw_pgsize;
 742
 743         /* check other parameters */
 744         if (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
 745              !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
 746             ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
 747              !(mr_access_flags & IB_ACCESS_LOCAL_WRITE))) {
 748                 /*
 749                  * Remote Write Access requires Local Write Access
 750                  * Remote Atomic Access requires Local Write Access
 751                  */
 752                 ehca_err(pd->device, "bad input values: mr_access_flags=%x",
 753                          mr_access_flags);
 754                 ib_fmr = ERR_PTR(-EINVAL);
 755                 goto alloc_fmr_exit0;
 756         }
 757         if (mr_access_flags & IB_ACCESS_MW_BIND) {
 758                 ehca_err(pd->device, "bad input values: mr_access_flags=%x",
 759                          mr_access_flags);
 760                 ib_fmr = ERR_PTR(-EINVAL);
 761                 goto alloc_fmr_exit0;
 762         }
 763         if ((fmr_attr->max_pages == 0) || (fmr_attr->max_maps == 0)) {
 764                 ehca_err(pd->device, "bad input values: fmr_attr->max_pages=%x "
 765                          "fmr_attr->max_maps=%x fmr_attr->page_shift=%x",
 766                          fmr_attr->max_pages, fmr_attr->max_maps,
 767                          fmr_attr->page_shift);
 768                 ib_fmr = ERR_PTR(-EINVAL);
 769                 goto alloc_fmr_exit0;
 770         }
 771
 772         hw_pgsize = 1 << fmr_attr->page_shift;
 773         if (!(hw_pgsize & shca->hca_cap_mr_pgsize)) {
 774                 ehca_err(pd->device, "unsupported fmr_attr->page_shift=%x",
 775                          fmr_attr->page_shift);
 776                 ib_fmr = ERR_PTR(-EINVAL);
 777                 goto alloc_fmr_exit0;
 778         }
 779
 780         e_fmr = ehca_mr_new();
 781         if (!e_fmr) {
 782                 ib_fmr = ERR_PTR(-ENOMEM);
 783                 goto alloc_fmr_exit0;
 784         }
 785         e_fmr->flags |= EHCA_MR_FLAG_FMR;
 786
 787         /* register MR on HCA */
 788         memset(&pginfo, 0, sizeof(pginfo));
 789         pginfo.hwpage_size = hw_pgsize;
 790         /*
 791          * pginfo.num_hwpages==0, ie register_rpages() will not be called
 792          * but deferred to map_phys_fmr()
 793          */
 794         ret = ehca_reg_mr(shca, e_fmr, NULL,
 795                           fmr_attr->max_pages * (1 << fmr_attr->page_shift),
 796                           mr_access_flags, e_pd, &pginfo,
 797                           &tmp_lkey, &tmp_rkey);
 798         if (ret) {
 799                 ib_fmr = ERR_PTR(ret);
 800                 goto alloc_fmr_exit1;
 801         }
 802
 803         /* successful */
 804         e_fmr->hwpage_size = hw_pgsize;
 805         e_fmr->fmr_page_size = 1 << fmr_attr->page_shift;
 806         e_fmr->fmr_max_pages = fmr_attr->max_pages;
 807         e_fmr->fmr_max_maps = fmr_attr->max_maps;
 808         e_fmr->fmr_map_cnt = 0;
 809         return &e_fmr->ib.ib_fmr;
 810
 811 alloc_fmr_exit1:
 812         ehca_mr_delete(e_fmr);
 813 alloc_fmr_exit0:
 814         return ib_fmr;
 815 } /* end ehca_alloc_fmr() */
 816
 817 /*----------------------------------------------------------------------*/
 818
 819 int ehca_map_phys_fmr(struct ib_fmr *fmr,
 820                       u64 *page_list,
 821                       int list_len,
 822                       u64 iova)
 823 {
 824         int ret;
 825         struct ehca_shca *shca =
 826                 container_of(fmr->device, struct ehca_shca, ib_device);
 827         struct ehca_mr *e_fmr = container_of(fmr, struct ehca_mr, ib.ib_fmr);
 828         struct ehca_pd *e_pd = container_of(fmr->pd, struct ehca_pd, ib_pd);
 829         struct ehca_mr_pginfo pginfo;
 830         u32 tmp_lkey, tmp_rkey;
 831
 832         if (!(e_fmr->flags & EHCA_MR_FLAG_FMR)) {
 833                 ehca_err(fmr->device, "not a FMR, e_fmr=%p e_fmr->flags=%x",
 834                          e_fmr, e_fmr->flags);
 835                 ret = -EINVAL;
 836                 goto map_phys_fmr_exit0;
 837         }
 838         ret = ehca_fmr_check_page_list(e_fmr, page_list, list_len);
 839         if (ret)
 840                 goto map_phys_fmr_exit0;
 841         if (iova % e_fmr->fmr_page_size) {
 842                 /* only whole-numbered pages */
 843                 ehca_err(fmr->device, "bad iova, iova=%lx fmr_page_size=%x",
 844                          iova, e_fmr->fmr_page_size);
 845                 ret = -EINVAL;
 846                 goto map_phys_fmr_exit0;
 847         }
 848         if (e_fmr->fmr_map_cnt >= e_fmr->fmr_max_maps) {
 849                 /* HCAD does not limit the maps, however trace this anyway */
 850                 ehca_info(fmr->device, "map limit exceeded, fmr=%p "
 851                           "e_fmr->fmr_map_cnt=%x e_fmr->fmr_max_maps=%x",
 852                           fmr, e_fmr->fmr_map_cnt, e_fmr->fmr_max_maps);
 853         }
 854
 855         memset(&pginfo, 0, sizeof(pginfo));
 856         pginfo.type = EHCA_MR_PGI_FMR;
 857         pginfo.num_kpages = list_len;
 858         pginfo.hwpage_size = e_fmr->hwpage_size;
 859         pginfo.num_hwpages =
 860                 list_len * e_fmr->fmr_page_size / pginfo.hwpage_size;
 861         pginfo.u.fmr.page_list = page_list;
 862         pginfo.next_hwpage =
 863                 (iova & (e_fmr->fmr_page_size-1)) / pginfo.hwpage_size;
 864         pginfo.u.fmr.fmr_pgsize = e_fmr->fmr_page_size;
 865
 866         ret = ehca_rereg_mr(shca, e_fmr, (u64 *)iova,
 867                             list_len * e_fmr->fmr_page_size,
 868                             e_fmr->acl, e_pd, &pginfo, &tmp_lkey, &tmp_rkey);
 869         if (ret)
 870                 goto map_phys_fmr_exit0;
 871
 872         /* successful reregistration */
 873         e_fmr->fmr_map_cnt++;
 874         e_fmr->ib.ib_fmr.lkey = tmp_lkey;
 875         e_fmr->ib.ib_fmr.rkey = tmp_rkey;
 876         return 0;
 877
 878 map_phys_fmr_exit0:
 879         if (ret)
 880                 ehca_err(fmr->device, "ret=%i fmr=%p page_list=%p list_len=%x "
 881                          "iova=%lx", ret, fmr, page_list, list_len, iova);
 882         return ret;
 883 } /* end ehca_map_phys_fmr() */
 884
 885 /*----------------------------------------------------------------------*/
 886
 887 int ehca_unmap_fmr(struct list_head *fmr_list)
 888 {
 889         int ret = 0;
 890         struct ib_fmr *ib_fmr;
 891         struct ehca_shca *shca = NULL;
 892         struct ehca_shca *prev_shca;
 893         struct ehca_mr *e_fmr;
 894         u32 num_fmr = 0;
 895         u32 unmap_fmr_cnt = 0;
 896
 897         /* check all FMR belong to same SHCA, and check internal flag */
 898         list_for_each_entry(ib_fmr, fmr_list, list) {
 899                 prev_shca = shca;
 900                 if (!ib_fmr) {
 901                         ehca_gen_err("bad fmr=%p in list", ib_fmr);
 902                         ret = -EINVAL;
 903                         goto unmap_fmr_exit0;
 904                 }
 905                 shca = container_of(ib_fmr->device, struct ehca_shca,
 906                                     ib_device);
 907                 e_fmr = container_of(ib_fmr, struct ehca_mr, ib.ib_fmr);
 908                 if ((shca != prev_shca) && prev_shca) {
 909                         ehca_err(&shca->ib_device, "SHCA mismatch, shca=%p "
 910                                  "prev_shca=%p e_fmr=%p",
 911                                  shca, prev_shca, e_fmr);
 912                         ret = -EINVAL;
 913                         goto unmap_fmr_exit0;
 914                 }
 915                 if (!(e_fmr->flags & EHCA_MR_FLAG_FMR)) {
 916                         ehca_err(&shca->ib_device, "not a FMR, e_fmr=%p "
 917                                  "e_fmr->flags=%x", e_fmr, e_fmr->flags);
 918                         ret = -EINVAL;
 919                         goto unmap_fmr_exit0;
 920                 }
 921                 num_fmr++;
 922         }
 923
 924         /* loop over all FMRs to unmap */
 925         list_for_each_entry(ib_fmr, fmr_list, list) {
 926                 unmap_fmr_cnt++;
 927                 e_fmr = container_of(ib_fmr, struct ehca_mr, ib.ib_fmr);
 928                 shca = container_of(ib_fmr->device, struct ehca_shca,
 929                                     ib_device);
 930                 ret = ehca_unmap_one_fmr(shca, e_fmr);
 931                 if (ret) {
 932                         /* unmap failed, stop unmapping of rest of FMRs */
 933                         ehca_err(&shca->ib_device, "unmap of one FMR failed, "
 934                                  "stop rest, e_fmr=%p num_fmr=%x "
 935                                  "unmap_fmr_cnt=%x lkey=%x", e_fmr, num_fmr,
 936                                  unmap_fmr_cnt, e_fmr->ib.ib_fmr.lkey);
 937                         goto unmap_fmr_exit0;
 938                 }
 939         }
 940
 941 unmap_fmr_exit0:
 942         if (ret)
 943                 ehca_gen_err("ret=%i fmr_list=%p num_fmr=%x unmap_fmr_cnt=%x",
 944                              ret, fmr_list, num_fmr, unmap_fmr_cnt);
 945         return ret;
 946 } /* end ehca_unmap_fmr() */
 947
 948 /*----------------------------------------------------------------------*/
 949
 950 int ehca_dealloc_fmr(struct ib_fmr *fmr)
 951 {
 952         int ret;
 953         u64 h_ret;
 954         struct ehca_shca *shca =
 955                 container_of(fmr->device, struct ehca_shca, ib_device);
 956         struct ehca_mr *e_fmr = container_of(fmr, struct ehca_mr, ib.ib_fmr);
 957
 958         if (!(e_fmr->flags & EHCA_MR_FLAG_FMR)) {
 959                 ehca_err(fmr->device, "not a FMR, e_fmr=%p e_fmr->flags=%x",
 960                          e_fmr, e_fmr->flags);
 961                 ret = -EINVAL;
 962                 goto free_fmr_exit0;
 963         }
 964
 965         h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_fmr);
 966         if (h_ret != H_SUCCESS) {
 967                 ehca_err(fmr->device, "hipz_free_mr failed, h_ret=%li e_fmr=%p "
 968                          "hca_hndl=%lx fmr_hndl=%lx fmr->lkey=%x",
 969                          h_ret, e_fmr, shca->ipz_hca_handle.handle,
 970                          e_fmr->ipz_mr_handle.handle, fmr->lkey);
 971                 ret = ehca2ib_return_code(h_ret);
 972                 goto free_fmr_exit0;
 973         }
 974         /* successful deregistration */
 975         ehca_mr_delete(e_fmr);
 976         return 0;
 977
 978 free_fmr_exit0:
 979         if (ret)
 980                 ehca_err(&shca->ib_device, "ret=%i fmr=%p", ret, fmr);
 981         return ret;
 982 } /* end ehca_dealloc_fmr() */
 983
 984 /*----------------------------------------------------------------------*/
 985
 986 int ehca_reg_mr(struct ehca_shca *shca,
 987                 struct ehca_mr *e_mr,
 988                 u64 *iova_start,
 989                 u64 size,
 990                 int acl,
 991                 struct ehca_pd *e_pd,
 992                 struct ehca_mr_pginfo *pginfo,
 993                 u32 *lkey, /*OUT*/
 994                 u32 *rkey) /*OUT*/
 995 {
 996         int ret;
 997         u64 h_ret;
 998         u32 hipz_acl;
 999         struct ehca_mr_hipzout_parms hipzout;
1000
1001         ehca_mrmw_map_acl(acl, &hipz_acl);
1002         ehca_mrmw_set_pgsize_hipz_acl(pginfo->hwpage_size, &hipz_acl);
1003         if (ehca_use_hp_mr == 1)
1004                 hipz_acl |= 0x00000001;
1005
1006         h_ret = hipz_h_alloc_resource_mr(shca->ipz_hca_handle, e_mr,
1007                                          (u64)iova_start, size, hipz_acl,
1008                                          e_pd->fw_pd, &hipzout);
1009         if (h_ret != H_SUCCESS) {
1010                 ehca_err(&shca->ib_device, "hipz_alloc_mr failed, h_ret=%li "
1011                          "hca_hndl=%lx", h_ret, shca->ipz_hca_handle.handle);
1012                 ret = ehca2ib_return_code(h_ret);
1013                 goto ehca_reg_mr_exit0;
1014         }
1015
1016         e_mr->ipz_mr_handle = hipzout.handle;
1017
1018         ret = ehca_reg_mr_rpages(shca, e_mr, pginfo);
1019         if (ret)
1020                 goto ehca_reg_mr_exit1;
1021
1022         /* successful registration */
1023         e_mr->num_kpages = pginfo->num_kpages;
1024         e_mr->num_hwpages = pginfo->num_hwpages;
1025         e_mr->hwpage_size = pginfo->hwpage_size;
1026         e_mr->start = iova_start;
1027         e_mr->size = size;
1028         e_mr->acl = acl;
1029         *lkey = hipzout.lkey;
1030         *rkey = hipzout.rkey;
1031         return 0;
1032
1033 ehca_reg_mr_exit1:
1034         h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_mr);
1035         if (h_ret != H_SUCCESS) {
1036                 ehca_err(&shca->ib_device, "h_ret=%li shca=%p e_mr=%p "
1037                          "iova_start=%p size=%lx acl=%x e_pd=%p lkey=%x "
1038                          "pginfo=%p num_kpages=%lx num_hwpages=%lx ret=%i",
1039                          h_ret, shca, e_mr, iova_start, size, acl, e_pd,
1040                          hipzout.lkey, pginfo, pginfo->num_kpages,
1041                          pginfo->num_hwpages, ret);
1042                 ehca_err(&shca->ib_device, "internal error in ehca_reg_mr, "
1043                          "not recoverable");
1044         }
1045 ehca_reg_mr_exit0:
1046         if (ret)
1047                 ehca_err(&shca->ib_device, "ret=%i shca=%p e_mr=%p "
1048                          "iova_start=%p size=%lx acl=%x e_pd=%p pginfo=%p "
1049                          "num_kpages=%lx num_hwpages=%lx",
1050                          ret, shca, e_mr, iova_start, size, acl, e_pd, pginfo,
1051                          pginfo->num_kpages, pginfo->num_hwpages);
1052         return ret;
1053 } /* end ehca_reg_mr() */
1054
1055 /*----------------------------------------------------------------------*/
1056
1057 int ehca_reg_mr_rpages(struct ehca_shca *shca,
1058                        struct ehca_mr *e_mr,
1059                        struct ehca_mr_pginfo *pginfo)
1060 {
1061         int ret = 0;
1062         u64 h_ret;
1063         u32 rnum;
1064         u64 rpage;
1065         u32 i;
1066         u64 *kpage;
1067
1068         if (!pginfo->num_hwpages) /* in case of fmr */
1069                 return 0;
1070
1071         kpage = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
1072         if (!kpage) {
1073                 ehca_err(&shca->ib_device, "kpage alloc failed");
1074                 ret = -ENOMEM;
1075                 goto ehca_reg_mr_rpages_exit0;
1076         }
1077
1078         /* max MAX_RPAGES ehca mr pages per register call */
1079         for (i = 0; i < NUM_CHUNKS(pginfo->num_hwpages, MAX_RPAGES); i++) {
1080
1081                 if (i == NUM_CHUNKS(pginfo->num_hwpages, MAX_RPAGES) - 1) {
1082                         rnum = pginfo->num_hwpages % MAX_RPAGES; /* last shot */
1083                         if (rnum == 0)
1084                                 rnum = MAX_RPAGES;      /* last shot is full */
1085                 } else
1086                         rnum = MAX_RPAGES;
1087
1088                 ret = ehca_set_pagebuf(pginfo, rnum, kpage);
1089                 if (ret) {
1090                         ehca_err(&shca->ib_device, "ehca_set_pagebuf "
1091                                  "bad rc, ret=%i rnum=%x kpage=%p",
1092                                  ret, rnum, kpage);
1093                         goto ehca_reg_mr_rpages_exit1;
1094                 }
1095
1096                 if (rnum > 1) {
1097                         rpage = virt_to_abs(kpage);
1098                         if (!rpage) {
1099                                 ehca_err(&shca->ib_device, "kpage=%p i=%x",
1100                                          kpage, i);
1101                                 ret = -EFAULT;
1102                                 goto ehca_reg_mr_rpages_exit1;
1103                         }
1104                 } else
1105                         rpage = *kpage;
1106
1107                 h_ret = hipz_h_register_rpage_mr(
1108                         shca->ipz_hca_handle, e_mr,
1109                         ehca_encode_hwpage_size(pginfo->hwpage_size),
1110                         0, rpage, rnum);
1111
1112                 if (i == NUM_CHUNKS(pginfo->num_hwpages, MAX_RPAGES) - 1) {
1113                         /*
1114                          * check for 'registration complete'==H_SUCCESS
1115                          * and for 'page registered'==H_PAGE_REGISTERED
1116                          */
1117                         if (h_ret != H_SUCCESS) {
1118                                 ehca_err(&shca->ib_device, "last "
1119                                          "hipz_reg_rpage_mr failed, h_ret=%li "
1120                                          "e_mr=%p i=%x hca_hndl=%lx mr_hndl=%lx"
1121                                          " lkey=%x", h_ret, e_mr, i,
1122                                          shca->ipz_hca_handle.handle,
1123                                          e_mr->ipz_mr_handle.handle,
1124                                          e_mr->ib.ib_mr.lkey);
1125                                 ret = ehca2ib_return_code(h_ret);
1126                                 break;
1127                         } else
1128                                 ret = 0;
1129                 } else if (h_ret != H_PAGE_REGISTERED) {
1130                         ehca_err(&shca->ib_device, "hipz_reg_rpage_mr failed, "
1131                                  "h_ret=%li e_mr=%p i=%x lkey=%x hca_hndl=%lx "
1132                                  "mr_hndl=%lx", h_ret, e_mr, i,
1133                                  e_mr->ib.ib_mr.lkey,
1134                                  shca->ipz_hca_handle.handle,
1135                                  e_mr->ipz_mr_handle.handle);
1136                         ret = ehca2ib_return_code(h_ret);
1137                         break;
1138                 } else
1139                         ret = 0;
1140         } /* end for(i) */
1141
1142
1143 ehca_reg_mr_rpages_exit1:
1144         ehca_free_fw_ctrlblock(kpage);
1145 ehca_reg_mr_rpages_exit0:
1146         if (ret)
1147                 ehca_err(&shca->ib_device, "ret=%i shca=%p e_mr=%p pginfo=%p "
1148                          "num_kpages=%lx num_hwpages=%lx", ret, shca, e_mr,
1149                          pginfo, pginfo->num_kpages, pginfo->num_hwpages);
1150         return ret;
1151 } /* end ehca_reg_mr_rpages() */
1152
1153 /*----------------------------------------------------------------------*/
1154
1155 inline int ehca_rereg_mr_rereg1(struct ehca_shca *shca,
1156                                 struct ehca_mr *e_mr,
1157                                 u64 *iova_start,
1158                                 u64 size,
1159                                 u32 acl,
1160                                 struct ehca_pd *e_pd,
1161                                 struct ehca_mr_pginfo *pginfo,
1162                                 u32 *lkey, /*OUT*/
1163                                 u32 *rkey) /*OUT*/
1164 {
1165         int ret;
1166         u64 h_ret;
1167         u32 hipz_acl;
1168         u64 *kpage;
1169         u64 rpage;
1170         struct ehca_mr_pginfo pginfo_save;
1171         struct ehca_mr_hipzout_parms hipzout;
1172
1173         ehca_mrmw_map_acl(acl, &hipz_acl);
1174         ehca_mrmw_set_pgsize_hipz_acl(pginfo->hwpage_size, &hipz_acl);
1175
1176         kpage = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
1177         if (!kpage) {
1178                 ehca_err(&shca->ib_device, "kpage alloc failed");
1179                 ret = -ENOMEM;
1180                 goto ehca_rereg_mr_rereg1_exit0;
1181         }
1182
1183         pginfo_save = *pginfo;
1184         ret = ehca_set_pagebuf(pginfo, pginfo->num_hwpages, kpage);
1185         if (ret) {
1186                 ehca_err(&shca->ib_device, "set pagebuf failed, e_mr=%p "
1187                          "pginfo=%p type=%x num_kpages=%lx num_hwpages=%lx "
1188                          "kpage=%p", e_mr, pginfo, pginfo->type,
1189                          pginfo->num_kpages, pginfo->num_hwpages, kpage);
1190                 goto ehca_rereg_mr_rereg1_exit1;
1191         }
1192         rpage = virt_to_abs(kpage);
1193         if (!rpage) {
1194                 ehca_err(&shca->ib_device, "kpage=%p", kpage);
1195                 ret = -EFAULT;
1196                 goto ehca_rereg_mr_rereg1_exit1;
1197         }
1198         h_ret = hipz_h_reregister_pmr(shca->ipz_hca_handle, e_mr,
1199                                       (u64)iova_start, size, hipz_acl,
1200                                       e_pd->fw_pd, rpage, &hipzout);
1201         if (h_ret != H_SUCCESS) {
1202                 /*
1203                  * reregistration unsuccessful, try it again with the 3 hCalls,
1204                  * e.g. this is required in case H_MR_CONDITION
1205                  * (MW bound or MR is shared)
1206                  */
1207                 ehca_warn(&shca->ib_device, "hipz_h_reregister_pmr failed "
1208                           "(Rereg1), h_ret=%li e_mr=%p", h_ret, e_mr);
1209                 *pginfo = pginfo_save;
1210                 ret = -EAGAIN;
1211         } else if ((u64 *)hipzout.vaddr != iova_start) {
1212                 ehca_err(&shca->ib_device, "PHYP changed iova_start in "
1213                          "rereg_pmr, iova_start=%p iova_start_out=%lx e_mr=%p "
1214                          "mr_handle=%lx lkey=%x lkey_out=%x", iova_start,
1215                          hipzout.vaddr, e_mr, e_mr->ipz_mr_handle.handle,
1216                          e_mr->ib.ib_mr.lkey, hipzout.lkey);
1217                 ret = -EFAULT;
1218         } else {
1219                 /*
1220                  * successful reregistration
1221                  * note: start and start_out are identical for eServer HCAs
1222                  */
1223                 e_mr->num_kpages = pginfo->num_kpages;
1224                 e_mr->num_hwpages = pginfo->num_hwpages;
1225                 e_mr->hwpage_size = pginfo->hwpage_size;
1226                 e_mr->start = iova_start;
1227                 e_mr->size = size;
1228                 e_mr->acl = acl;
1229                 *lkey = hipzout.lkey;
1230                 *rkey = hipzout.rkey;
1231         }
1232
1233 ehca_rereg_mr_rereg1_exit1:
1234         ehca_free_fw_ctrlblock(kpage);
1235 ehca_rereg_mr_rereg1_exit0:
1236         if ( ret && (ret != -EAGAIN) )
1237                 ehca_err(&shca->ib_device, "ret=%i lkey=%x rkey=%x "
1238                          "pginfo=%p num_kpages=%lx num_hwpages=%lx",
1239                          ret, *lkey, *rkey, pginfo, pginfo->num_kpages,
1240                          pginfo->num_hwpages);
1241         return ret;
1242 } /* end ehca_rereg_mr_rereg1() */
1243
1244 /*----------------------------------------------------------------------*/
1245
1246 int ehca_rereg_mr(struct ehca_shca *shca,
1247                   struct ehca_mr *e_mr,
1248                   u64 *iova_start,
1249                   u64 size,
1250                   int acl,
1251                   struct ehca_pd *e_pd,
1252                   struct ehca_mr_pginfo *pginfo,
1253                   u32 *lkey,
1254                   u32 *rkey)
1255 {
1256         int ret = 0;
1257         u64 h_ret;
1258         int rereg_1_hcall = 1; /* 1: use hipz_h_reregister_pmr directly */
1259         int rereg_3_hcall = 0; /* 1: use 3 hipz calls for reregistration */
1260
1261         /* first determine reregistration hCall(s) */
1262         if ((pginfo->num_hwpages > MAX_RPAGES) ||
1263             (e_mr->num_hwpages > MAX_RPAGES) ||
1264             (pginfo->num_hwpages > e_mr->num_hwpages)) {
1265                 ehca_dbg(&shca->ib_device, "Rereg3 case, "
1266                          "pginfo->num_hwpages=%lx e_mr->num_hwpages=%x",
1267                          pginfo->num_hwpages, e_mr->num_hwpages);
1268                 rereg_1_hcall = 0;
1269                 rereg_3_hcall = 1;
1270         }
1271
1272         if (e_mr->flags & EHCA_MR_FLAG_MAXMR) { /* check for max-MR */
1273                 rereg_1_hcall = 0;
1274                 rereg_3_hcall = 1;
1275                 e_mr->flags &= ~EHCA_MR_FLAG_MAXMR;
1276                 ehca_err(&shca->ib_device, "Rereg MR for max-MR! e_mr=%p",
1277                          e_mr);
1278         }
1279
1280         if (rereg_1_hcall) {
1281                 ret = ehca_rereg_mr_rereg1(shca, e_mr, iova_start, size,
1282                                            acl, e_pd, pginfo, lkey, rkey);
1283                 if (ret) {
1284                         if (ret == -EAGAIN)
1285                                 rereg_3_hcall = 1;
1286                         else
1287                                 goto ehca_rereg_mr_exit0;
1288                 }
1289         }
1290
1291         if (rereg_3_hcall) {
1292                 struct ehca_mr save_mr;
1293
1294                 /* first deregister old MR */
1295                 h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_mr);
1296                 if (h_ret != H_SUCCESS) {
1297                         ehca_err(&shca->ib_device, "hipz_free_mr failed, "
1298                                  "h_ret=%li e_mr=%p hca_hndl=%lx mr_hndl=%lx "
1299                                  "mr->lkey=%x",
1300                                  h_ret, e_mr, shca->ipz_hca_handle.handle,
1301                                  e_mr->ipz_mr_handle.handle,
1302                                  e_mr->ib.ib_mr.lkey);
1303                         ret = ehca2ib_return_code(h_ret);
1304                         goto ehca_rereg_mr_exit0;
1305                 }
1306                 /* clean ehca_mr_t, without changing struct ib_mr and lock */
1307                 save_mr = *e_mr;
1308                 ehca_mr_deletenew(e_mr);
1309
1310                 /* set some MR values */
1311                 e_mr->flags = save_mr.flags;
1312                 e_mr->hwpage_size = save_mr.hwpage_size;
1313                 e_mr->fmr_page_size = save_mr.fmr_page_size;
1314                 e_mr->fmr_max_pages = save_mr.fmr_max_pages;
1315                 e_mr->fmr_max_maps = save_mr.fmr_max_maps;
1316                 e_mr->fmr_map_cnt = save_mr.fmr_map_cnt;
1317
1318                 ret = ehca_reg_mr(shca, e_mr, iova_start, size, acl,
1319                                   e_pd, pginfo, lkey, rkey);
1320                 if (ret) {
1321                         u32 offset = (u64)(&e_mr->flags) - (u64)e_mr;
1322                         memcpy(&e_mr->flags, &(save_mr.flags),
1323                                sizeof(struct ehca_mr) - offset);
1324                         goto ehca_rereg_mr_exit0;
1325                 }
1326         }
1327
1328 ehca_rereg_mr_exit0:
1329         if (ret)
1330                 ehca_err(&shca->ib_device, "ret=%i shca=%p e_mr=%p "
1331                          "iova_start=%p size=%lx acl=%x e_pd=%p pginfo=%p "
1332                          "num_kpages=%lx lkey=%x rkey=%x rereg_1_hcall=%x "
1333                          "rereg_3_hcall=%x", ret, shca, e_mr, iova_start, size,
1334                          acl, e_pd, pginfo, pginfo->num_kpages, *lkey, *rkey,
1335                          rereg_1_hcall, rereg_3_hcall);
1336         return ret;
1337 } /* end ehca_rereg_mr() */
1338
1339 /*----------------------------------------------------------------------*/
1340
1341 int ehca_unmap_one_fmr(struct ehca_shca *shca,
1342                        struct ehca_mr *e_fmr)
1343 {
1344         int ret = 0;
1345         u64 h_ret;
1346         struct ehca_pd *e_pd =
1347                 container_of(e_fmr->ib.ib_fmr.pd, struct ehca_pd, ib_pd);
1348         struct ehca_mr save_fmr;
1349         u32 tmp_lkey, tmp_rkey;
1350         struct ehca_mr_pginfo pginfo;
1351         struct ehca_mr_hipzout_parms hipzout;
1352         struct ehca_mr save_mr;
1353
1354         if (e_fmr->fmr_max_pages <= MAX_RPAGES) {
1355                 /*
1356                  * note: after using rereg hcall with len=0,
1357                  * rereg hcall must be used again for registering pages
1358                  */
1359                 h_ret = hipz_h_reregister_pmr(shca->ipz_hca_handle, e_fmr, 0,
1360                                               0, 0, e_pd->fw_pd, 0, &hipzout);
1361                 if (h_ret == H_SUCCESS) {
1362                         /* successful reregistration */
1363                         e_fmr->start = NULL;
1364                         e_fmr->size = 0;
1365                         tmp_lkey = hipzout.lkey;
1366                         tmp_rkey = hipzout.rkey;
1367                         return 0;
1368                 }
1369                 /*
1370                  * should not happen, because length checked above,
1371                  * FMRs are not shared and no MW bound to FMRs
1372                  */
1373                 ehca_err(&shca->ib_device, "hipz_reregister_pmr failed "
1374                          "(Rereg1), h_ret=%li e_fmr=%p hca_hndl=%lx "
1375                          "mr_hndl=%lx lkey=%x lkey_out=%x",
1376                          h_ret, e_fmr, shca->ipz_hca_handle.handle,
1377                          e_fmr->ipz_mr_handle.handle,
1378                          e_fmr->ib.ib_fmr.lkey, hipzout.lkey);
1379                 /* try free and rereg */
1380         }
1381
1382         /* first free old FMR */
1383         h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_fmr);
1384         if (h_ret != H_SUCCESS) {
1385                 ehca_err(&shca->ib_device, "hipz_free_mr failed, "
1386                          "h_ret=%li e_fmr=%p hca_hndl=%lx mr_hndl=%lx "
1387                          "lkey=%x",
1388                          h_ret, e_fmr, shca->ipz_hca_handle.handle,
1389                          e_fmr->ipz_mr_handle.handle,
1390                          e_fmr->ib.ib_fmr.lkey);
1391                 ret = ehca2ib_return_code(h_ret);
1392                 goto ehca_unmap_one_fmr_exit0;
1393         }
1394         /* clean ehca_mr_t, without changing lock */
1395         save_fmr = *e_fmr;
1396         ehca_mr_deletenew(e_fmr);
1397
1398         /* set some MR values */
1399         e_fmr->flags = save_fmr.flags;
1400         e_fmr->hwpage_size = save_fmr.hwpage_size;
1401         e_fmr->fmr_page_size = save_fmr.fmr_page_size;
1402         e_fmr->fmr_max_pages = save_fmr.fmr_max_pages;
1403         e_fmr->fmr_max_maps = save_fmr.fmr_max_maps;
1404         e_fmr->fmr_map_cnt = save_fmr.fmr_map_cnt;
1405         e_fmr->acl = save_fmr.acl;
1406
1407         memset(&pginfo, 0, sizeof(pginfo));
1408         pginfo.type = EHCA_MR_PGI_FMR;
1409         ret = ehca_reg_mr(shca, e_fmr, NULL,
1410                           (e_fmr->fmr_max_pages * e_fmr->fmr_page_size),
1411                           e_fmr->acl, e_pd, &pginfo, &tmp_lkey,
1412                           &tmp_rkey);
1413         if (ret) {
1414                 u32 offset = (u64)(&e_fmr->flags) - (u64)e_fmr;
1415                 memcpy(&e_fmr->flags, &(save_mr.flags),
1416                        sizeof(struct ehca_mr) - offset);
1417         }
1418
1419 ehca_unmap_one_fmr_exit0:
1420         if (ret)
1421                 ehca_err(&shca->ib_device, "ret=%i tmp_lkey=%x tmp_rkey=%x "
1422                          "fmr_max_pages=%x",
1423                          ret, tmp_lkey, tmp_rkey, e_fmr->fmr_max_pages);
1424         return ret;
1425 } /* end ehca_unmap_one_fmr() */
1426
1427 /*----------------------------------------------------------------------*/
1428
1429 int ehca_reg_smr(struct ehca_shca *shca,
1430                  struct ehca_mr *e_origmr,
1431                  struct ehca_mr *e_newmr,
1432                  u64 *iova_start,
1433                  int acl,
1434                  struct ehca_pd *e_pd,
1435                  u32 *lkey, /*OUT*/
1436                  u32 *rkey) /*OUT*/
1437 {
1438         int ret = 0;
1439         u64 h_ret;
1440         u32 hipz_acl;
1441         struct ehca_mr_hipzout_parms hipzout;
1442
1443         ehca_mrmw_map_acl(acl, &hipz_acl);
1444         ehca_mrmw_set_pgsize_hipz_acl(e_origmr->hwpage_size, &hipz_acl);
1445
1446         h_ret = hipz_h_register_smr(shca->ipz_hca_handle, e_newmr, e_origmr,
1447                                     (u64)iova_start, hipz_acl, e_pd->fw_pd,
1448                                     &hipzout);
1449         if (h_ret != H_SUCCESS) {
1450                 ehca_err(&shca->ib_device, "hipz_reg_smr failed, h_ret=%li "
1451                          "shca=%p e_origmr=%p e_newmr=%p iova_start=%p acl=%x "
1452                          "e_pd=%p hca_hndl=%lx mr_hndl=%lx lkey=%x",
1453                          h_ret, shca, e_origmr, e_newmr, iova_start, acl, e_pd,
1454                          shca->ipz_hca_handle.handle,
1455                          e_origmr->ipz_mr_handle.handle,
1456                          e_origmr->ib.ib_mr.lkey);
1457                 ret = ehca2ib_return_code(h_ret);
1458                 goto ehca_reg_smr_exit0;
1459         }
1460         /* successful registration */
1461         e_newmr->num_kpages = e_origmr->num_kpages;
1462         e_newmr->num_hwpages = e_origmr->num_hwpages;
1463         e_newmr->hwpage_size   = e_origmr->hwpage_size;
1464         e_newmr->start = iova_start;
1465         e_newmr->size = e_origmr->size;
1466         e_newmr->acl = acl;
1467         e_newmr->ipz_mr_handle = hipzout.handle;
1468         *lkey = hipzout.lkey;
1469         *rkey = hipzout.rkey;
1470         return 0;
1471
1472 ehca_reg_smr_exit0:
1473         if (ret)
1474                 ehca_err(&shca->ib_device, "ret=%i shca=%p e_origmr=%p "
1475                          "e_newmr=%p iova_start=%p acl=%x e_pd=%p",
1476                          ret, shca, e_origmr, e_newmr, iova_start, acl, e_pd);
1477         return ret;
1478 } /* end ehca_reg_smr() */
1479
1480 /*----------------------------------------------------------------------*/
1481
1482 /* register internal max-MR to internal SHCA */
1483 int ehca_reg_internal_maxmr(
1484         struct ehca_shca *shca,
1485         struct ehca_pd *e_pd,
1486         struct ehca_mr **e_maxmr)  /*OUT*/
1487 {
1488         int ret;
1489         struct ehca_mr *e_mr;
1490         u64 *iova_start;
1491         u64 size_maxmr;
1492         struct ehca_mr_pginfo pginfo;
1493         struct ib_phys_buf ib_pbuf;
1494         u32 num_kpages;
1495         u32 num_hwpages;
1496         u64 hw_pgsize;
1497
1498         e_mr = ehca_mr_new();
1499         if (!e_mr) {
1500                 ehca_err(&shca->ib_device, "out of memory");
1501                 ret = -ENOMEM;
1502                 goto ehca_reg_internal_maxmr_exit0;
1503         }
1504         e_mr->flags |= EHCA_MR_FLAG_MAXMR;
1505
1506         /* register internal max-MR on HCA */
1507         size_maxmr = (u64)high_memory - PAGE_OFFSET;
1508         iova_start = (u64 *)KERNELBASE;
1509         ib_pbuf.addr = 0;
1510         ib_pbuf.size = size_maxmr;
1511         num_kpages = NUM_CHUNKS(((u64)iova_start % PAGE_SIZE) + size_maxmr,
1512                                 PAGE_SIZE);
1513         hw_pgsize = ehca_get_max_hwpage_size(shca);
1514         num_hwpages = NUM_CHUNKS(((u64)iova_start % hw_pgsize) + size_maxmr,
1515                                  hw_pgsize);
1516
1517         memset(&pginfo, 0, sizeof(pginfo));
1518         pginfo.type = EHCA_MR_PGI_PHYS;
1519         pginfo.num_kpages = num_kpages;
1520         pginfo.num_hwpages = num_hwpages;
1521         pginfo.hwpage_size = hw_pgsize;
1522         pginfo.u.phy.num_phys_buf = 1;
1523         pginfo.u.phy.phys_buf_array = &ib_pbuf;
1524
1525         ret = ehca_reg_mr(shca, e_mr, iova_start, size_maxmr, 0, e_pd,
1526                           &pginfo, &e_mr->ib.ib_mr.lkey,
1527                           &e_mr->ib.ib_mr.rkey);
1528         if (ret) {
1529                 ehca_err(&shca->ib_device, "reg of internal max MR failed, "
1530                          "e_mr=%p iova_start=%p size_maxmr=%lx num_kpages=%x "
1531                          "num_hwpages=%x", e_mr, iova_start, size_maxmr,
1532                          num_kpages, num_hwpages);
1533                 goto ehca_reg_internal_maxmr_exit1;
1534         }
1535
1536         /* successful registration of all pages */
1537         e_mr->ib.ib_mr.device = e_pd->ib_pd.device;
1538         e_mr->ib.ib_mr.pd = &e_pd->ib_pd;
1539         e_mr->ib.ib_mr.uobject = NULL;
1540         atomic_inc(&(e_pd->ib_pd.usecnt));
1541         atomic_set(&(e_mr->ib.ib_mr.usecnt), 0);
1542         *e_maxmr = e_mr;
1543         return 0;
1544
1545 ehca_reg_internal_maxmr_exit1:
1546         ehca_mr_delete(e_mr);
1547 ehca_reg_internal_maxmr_exit0:
1548         if (ret)
1549                 ehca_err(&shca->ib_device, "ret=%i shca=%p e_pd=%p e_maxmr=%p",
1550                          ret, shca, e_pd, e_maxmr);
1551         return ret;
1552 } /* end ehca_reg_internal_maxmr() */
1553
1554 /*----------------------------------------------------------------------*/
1555
1556 int ehca_reg_maxmr(struct ehca_shca *shca,
1557                    struct ehca_mr *e_newmr,
1558                    u64 *iova_start,
1559                    int acl,
1560                    struct ehca_pd *e_pd,
1561                    u32 *lkey,
1562                    u32 *rkey)
1563 {
1564         u64 h_ret;
1565         struct ehca_mr *e_origmr = shca->maxmr;
1566         u32 hipz_acl;
1567         struct ehca_mr_hipzout_parms hipzout;
1568
1569         ehca_mrmw_map_acl(acl, &hipz_acl);
1570         ehca_mrmw_set_pgsize_hipz_acl(e_origmr->hwpage_size, &hipz_acl);
1571
1572         h_ret = hipz_h_register_smr(shca->ipz_hca_handle, e_newmr, e_origmr,
1573                                     (u64)iova_start, hipz_acl, e_pd->fw_pd,
1574                                     &hipzout);
1575         if (h_ret != H_SUCCESS) {
1576                 ehca_err(&shca->ib_device, "hipz_reg_smr failed, h_ret=%li "
1577                          "e_origmr=%p hca_hndl=%lx mr_hndl=%lx lkey=%x",
1578                          h_ret, e_origmr, shca->ipz_hca_handle.handle,
1579                          e_origmr->ipz_mr_handle.handle,
1580                          e_origmr->ib.ib_mr.lkey);
1581                 return ehca2ib_return_code(h_ret);
1582         }
1583         /* successful registration */
1584         e_newmr->num_kpages = e_origmr->num_kpages;
1585         e_newmr->num_hwpages = e_origmr->num_hwpages;
1586         e_newmr->hwpage_size = e_origmr->hwpage_size;
1587         e_newmr->start = iova_start;
1588         e_newmr->size = e_origmr->size;
1589         e_newmr->acl = acl;
1590         e_newmr->ipz_mr_handle = hipzout.handle;
1591         *lkey = hipzout.lkey;
1592         *rkey = hipzout.rkey;
1593         return 0;
1594 } /* end ehca_reg_maxmr() */
1595
1596 /*----------------------------------------------------------------------*/
1597
1598 int ehca_dereg_internal_maxmr(struct ehca_shca *shca)
1599 {
1600         int ret;
1601         struct ehca_mr *e_maxmr;
1602         struct ib_pd *ib_pd;
1603
1604         if (!shca->maxmr) {
1605                 ehca_err(&shca->ib_device, "bad call, shca=%p", shca);
1606                 ret = -EINVAL;
1607                 goto ehca_dereg_internal_maxmr_exit0;
1608         }
1609
1610         e_maxmr = shca->maxmr;
1611         ib_pd = e_maxmr->ib.ib_mr.pd;
1612         shca->maxmr = NULL; /* remove internal max-MR indication from SHCA */
1613
1614         ret = ehca_dereg_mr(&e_maxmr->ib.ib_mr);
1615         if (ret) {
1616                 ehca_err(&shca->ib_device, "dereg internal max-MR failed, "
1617                          "ret=%i e_maxmr=%p shca=%p lkey=%x",
1618                          ret, e_maxmr, shca, e_maxmr->ib.ib_mr.lkey);
1619                 shca->maxmr = e_maxmr;
1620                 goto ehca_dereg_internal_maxmr_exit0;
1621         }
1622
1623         atomic_dec(&ib_pd->usecnt);
1624
1625 ehca_dereg_internal_maxmr_exit0:
1626         if (ret)
1627                 ehca_err(&shca->ib_device, "ret=%i shca=%p shca->maxmr=%p",
1628                          ret, shca, shca->maxmr);
1629         return ret;
1630 } /* end ehca_dereg_internal_maxmr() */
1631
1632 /*----------------------------------------------------------------------*/
1633
1634 /*
1635  * check physical buffer array of MR verbs for validness and
1636  * calculates MR size
1637  */
1638 int ehca_mr_chk_buf_and_calc_size(struct ib_phys_buf *phys_buf_array,
1639                                   int num_phys_buf,
1640                                   u64 *iova_start,
1641                                   u64 *size)
1642 {
1643         struct ib_phys_buf *pbuf = phys_buf_array;
1644         u64 size_count = 0;
1645         u32 i;
1646
1647         if (num_phys_buf == 0) {
1648                 ehca_gen_err("bad phys buf array len, num_phys_buf=0");
1649                 return -EINVAL;
1650         }
1651         /* check first buffer */
1652         if (((u64)iova_start & ~PAGE_MASK) != (pbuf->addr & ~PAGE_MASK)) {
1653                 ehca_gen_err("iova_start/addr mismatch, iova_start=%p "
1654                              "pbuf->addr=%lx pbuf->size=%lx",
1655                              iova_start, pbuf->addr, pbuf->size);
1656                 return -EINVAL;
1657         }
1658         if (((pbuf->addr + pbuf->size) % PAGE_SIZE) &&
1659             (num_phys_buf > 1)) {
1660                 ehca_gen_err("addr/size mismatch in 1st buf, pbuf->addr=%lx "
1661                              "pbuf->size=%lx", pbuf->addr, pbuf->size);
1662                 return -EINVAL;
1663         }
1664
1665         for (i = 0; i < num_phys_buf; i++) {
1666                 if ((i > 0) && (pbuf->addr % PAGE_SIZE)) {
1667                         ehca_gen_err("bad address, i=%x pbuf->addr=%lx "
1668                                      "pbuf->size=%lx",
1669                                      i, pbuf->addr, pbuf->size);
1670                         return -EINVAL;
1671                 }
1672                 if (((i > 0) && /* not 1st */
1673                      (i < (num_phys_buf - 1)) &&        /* not last */
1674                      (pbuf->size % PAGE_SIZE)) || (pbuf->size == 0)) {
1675                         ehca_gen_err("bad size, i=%x pbuf->size=%lx",
1676                                      i, pbuf->size);
1677                         return -EINVAL;
1678                 }
1679                 size_count += pbuf->size;
1680                 pbuf++;
1681         }
1682
1683         *size = size_count;
1684         return 0;
1685 } /* end ehca_mr_chk_buf_and_calc_size() */
1686
1687 /*----------------------------------------------------------------------*/
1688
1689 /* check page list of map FMR verb for validness */
1690 int ehca_fmr_check_page_list(struct ehca_mr *e_fmr,
1691                              u64 *page_list,
1692                              int list_len)
1693 {
1694         u32 i;
1695         u64 *page;
1696
1697         if ((list_len == 0) || (list_len > e_fmr->fmr_max_pages)) {
1698                 ehca_gen_err("bad list_len, list_len=%x "
1699                              "e_fmr->fmr_max_pages=%x fmr=%p",
1700                              list_len, e_fmr->fmr_max_pages, e_fmr);
1701                 return -EINVAL;
1702         }
1703
1704         /* each page must be aligned */
1705         page = page_list;
1706         for (i = 0; i < list_len; i++) {
1707                 if (*page % e_fmr->fmr_page_size) {
1708                         ehca_gen_err("bad page, i=%x *page=%lx page=%p fmr=%p "
1709                                      "fmr_page_size=%x", i, *page, page, e_fmr,
1710                                      e_fmr->fmr_page_size);
1711                         return -EINVAL;
1712                 }
1713                 page++;
1714         }
1715
1716         return 0;
1717 } /* end ehca_fmr_check_page_list() */
1718
1719 /*----------------------------------------------------------------------*/
1720
1721 /* PAGE_SIZE >= pginfo->hwpage_size */
1722 static int ehca_set_pagebuf_user1(struct ehca_mr_pginfo *pginfo,
1723                                   u32 number,
1724                                   u64 *kpage)
1725 {
1726         int ret = 0;
1727         struct ib_umem_chunk *prev_chunk;
1728         struct ib_umem_chunk *chunk;
1729         u64 pgaddr;
1730         u32 i = 0;
1731         u32 j = 0;
1732         int hwpages_per_kpage = PAGE_SIZE / pginfo->hwpage_size;
1733
1734         /* loop over desired chunk entries */
1735         chunk      = pginfo->u.usr.next_chunk;
1736         prev_chunk = pginfo->u.usr.next_chunk;
1737         list_for_each_entry_continue(
1738                 chunk, (&(pginfo->u.usr.region->chunk_list)), list) {
1739                 for (i = pginfo->u.usr.next_nmap; i < chunk->nmap; ) {
1740                         pgaddr = page_to_pfn(sg_page(&chunk->page_list[i]))
1741                                 << PAGE_SHIFT ;
1742                         *kpage = phys_to_abs(pgaddr +
1743                                              (pginfo->next_hwpage *
1744                                               pginfo->hwpage_size));
1745                         if ( !(*kpage) ) {
1746                                 ehca_gen_err("pgaddr=%lx "
1747                                              "chunk->page_list[i]=%lx "
1748                                              "i=%x next_hwpage=%lx",
1749                                              pgaddr, (u64)sg_dma_address(
1750                                                      &chunk->page_list[i]),
1751                                              i, pginfo->next_hwpage);
1752                                 return -EFAULT;
1753                         }
1754                         (pginfo->hwpage_cnt)++;
1755                         (pginfo->next_hwpage)++;
1756                         kpage++;
1757                         if (pginfo->next_hwpage % hwpages_per_kpage == 0) {
1758                                 (pginfo->kpage_cnt)++;
1759                                 (pginfo->u.usr.next_nmap)++;
1760                                 pginfo->next_hwpage = 0;
1761                                 i++;
1762                         }
1763                         j++;
1764                         if (j >= number) break;
1765                 }
1766                 if ((pginfo->u.usr.next_nmap >= chunk->nmap) &&
1767                     (j >= number)) {
1768                         pginfo->u.usr.next_nmap = 0;
1769                         prev_chunk = chunk;
1770                         break;
1771                 } else if (pginfo->u.usr.next_nmap >= chunk->nmap) {
1772                         pginfo->u.usr.next_nmap = 0;
1773                         prev_chunk = chunk;
1774                 } else if (j >= number)
1775                         break;
1776                 else
1777                         prev_chunk = chunk;
1778         }
1779         pginfo->u.usr.next_chunk =
1780                 list_prepare_entry(prev_chunk,
1781                                    (&(pginfo->u.usr.region->chunk_list)),
1782                                    list);
1783         return ret;
1784 }
1785
1786 /*
1787  * check given pages for contiguous layout
1788  * last page addr is returned in prev_pgaddr for further check
1789  */
1790 static int ehca_check_kpages_per_ate(struct scatterlist *page_list,
1791                                      int start_idx, int end_idx,
1792                                      u64 *prev_pgaddr)
1793 {
1794         int t;
1795         for (t = start_idx; t <= end_idx; t++) {
1796                 u64 pgaddr = page_to_pfn(sg_page(&page_list[t])) << PAGE_SHIFT;
1797                 if (ehca_debug_level >= 3)
1798                         ehca_gen_dbg("chunk_page=%lx value=%016lx", pgaddr,
1799                                      *(u64 *)abs_to_virt(phys_to_abs(pgaddr)));
1800                 if (pgaddr - PAGE_SIZE != *prev_pgaddr) {
1801                         ehca_gen_err("uncontiguous page found pgaddr=%lx "
1802                                      "prev_pgaddr=%lx page_list_i=%x",
1803                                      pgaddr, *prev_pgaddr, t);
1804                         return -EINVAL;
1805                 }
1806                 *prev_pgaddr = pgaddr;
1807         }
1808         return 0;
1809 }
1810
1811 /* PAGE_SIZE < pginfo->hwpage_size */
1812 static int ehca_set_pagebuf_user2(struct ehca_mr_pginfo *pginfo,
1813                                   u32 number,
1814                                   u64 *kpage)
1815 {
1816         int ret = 0;
1817         struct ib_umem_chunk *prev_chunk;
1818         struct ib_umem_chunk *chunk;
1819         u64 pgaddr, prev_pgaddr;
1820         u32 i = 0;
1821         u32 j = 0;
1822         int kpages_per_hwpage = pginfo->hwpage_size / PAGE_SIZE;
1823         int nr_kpages = kpages_per_hwpage;
1824
1825         /* loop over desired chunk entries */
1826         chunk      = pginfo->u.usr.next_chunk;
1827         prev_chunk = pginfo->u.usr.next_chunk;
1828         list_for_each_entry_continue(
1829                 chunk, (&(pginfo->u.usr.region->chunk_list)), list) {
1830                 for (i = pginfo->u.usr.next_nmap; i < chunk->nmap; ) {
1831                         if (nr_kpages == kpages_per_hwpage) {
1832                                 pgaddr = ( page_to_pfn(sg_page(&chunk->page_list[i]))
1833                                            << PAGE_SHIFT );
1834                                 *kpage = phys_to_abs(pgaddr);
1835                                 if ( !(*kpage) ) {
1836                                         ehca_gen_err("pgaddr=%lx i=%x",
1837                                                      pgaddr, i);
1838                                         ret = -EFAULT;
1839                                         return ret;
1840                                 }
1841                                 /*
1842                                  * The first page in a hwpage must be aligned;
1843                                  * the first MR page is exempt from this rule.
1844                                  */
1845                                 if (pgaddr & (pginfo->hwpage_size - 1)) {
1846                                         if (pginfo->hwpage_cnt) {
1847                                                 ehca_gen_err(
1848                                                         "invalid alignment "
1849                                                         "pgaddr=%lx i=%x "
1850                                                         "mr_pgsize=%lx",
1851                                                         pgaddr, i,
1852                                                         pginfo->hwpage_size);
1853                                                 ret = -EFAULT;
1854                                                 return ret;
1855                                         }
1856                                         /* first MR page */
1857                                         pginfo->kpage_cnt =
1858                                                 (pgaddr &
1859                                                  (pginfo->hwpage_size - 1)) >>
1860                                                 PAGE_SHIFT;
1861                                         nr_kpages -= pginfo->kpage_cnt;
1862                                         *kpage = phys_to_abs(
1863                                                 pgaddr &
1864                                                 ~(pginfo->hwpage_size - 1));
1865                                 }
1866                                 if (ehca_debug_level >= 3) {
1867                                         u64 val = *(u64 *)abs_to_virt(
1868                                                 phys_to_abs(pgaddr));
1869                                         ehca_gen_dbg("kpage=%lx chunk_page=%lx "
1870                                                      "value=%016lx",
1871                                                      *kpage, pgaddr, val);
1872                                 }
1873                                 prev_pgaddr = pgaddr;
1874                                 i++;
1875                                 pginfo->kpage_cnt++;
1876                                 pginfo->u.usr.next_nmap++;
1877                                 nr_kpages--;
1878                                 if (!nr_kpages)
1879                                         goto next_kpage;
1880                                 continue;
1881                         }
1882                         if (i + nr_kpages > chunk->nmap) {
1883                                 ret = ehca_check_kpages_per_ate(
1884                                         chunk->page_list, i,
1885                                         chunk->nmap - 1, &prev_pgaddr);
1886                                 if (ret) return ret;
1887                                 pginfo->kpage_cnt += chunk->nmap - i;
1888                                 pginfo->u.usr.next_nmap += chunk->nmap - i;
1889                                 nr_kpages -= chunk->nmap - i;
1890                                 break;
1891                         }
1892
1893                         ret = ehca_check_kpages_per_ate(chunk->page_list, i,
1894                                                         i + nr_kpages - 1,
1895                                                         &prev_pgaddr);
1896                         if (ret) return ret;
1897                         i += nr_kpages;
1898                         pginfo->kpage_cnt += nr_kpages;
1899                         pginfo->u.usr.next_nmap += nr_kpages;
1900 next_kpage:
1901                         nr_kpages = kpages_per_hwpage;
1902                         (pginfo->hwpage_cnt)++;
1903                         kpage++;
1904                         j++;
1905                         if (j >= number) break;
1906                 }
1907                 if ((pginfo->u.usr.next_nmap >= chunk->nmap) &&
1908                     (j >= number)) {
1909                         pginfo->u.usr.next_nmap = 0;
1910                         prev_chunk = chunk;
1911                         break;
1912                 } else if (pginfo->u.usr.next_nmap >= chunk->nmap) {
1913                         pginfo->u.usr.next_nmap = 0;
1914                         prev_chunk = chunk;
1915                 } else if (j >= number)
1916                         break;
1917                 else
1918                         prev_chunk = chunk;
1919         }
1920         pginfo->u.usr.next_chunk =
1921                 list_prepare_entry(prev_chunk,
1922                                    (&(pginfo->u.usr.region->chunk_list)),
1923                                    list);
1924         return ret;
1925 }
1926
1927 static int ehca_set_pagebuf_phys(struct ehca_mr_pginfo *pginfo,
1928                                  u32 number, u64 *kpage)
1929 {
1930         int ret = 0;
1931         struct ib_phys_buf *pbuf;
1932         u64 num_hw, offs_hw;
1933         u32 i = 0;
1934
1935         /* loop over desired phys_buf_array entries */
1936         while (i < number) {
1937                 pbuf   = pginfo->u.phy.phys_buf_array + pginfo->u.phy.next_buf;
1938                 num_hw  = NUM_CHUNKS((pbuf->addr % pginfo->hwpage_size) +
1939                                      pbuf->size, pginfo->hwpage_size);
1940                 offs_hw = (pbuf->addr & ~(pginfo->hwpage_size - 1)) /
1941                         pginfo->hwpage_size;
1942                 while (pginfo->next_hwpage < offs_hw + num_hw) {
1943                         /* sanity check */
1944                         if ((pginfo->kpage_cnt >= pginfo->num_kpages) ||
1945                             (pginfo->hwpage_cnt >= pginfo->num_hwpages)) {
1946                                 ehca_gen_err("kpage_cnt >= num_kpages, "
1947                                              "kpage_cnt=%lx num_kpages=%lx "
1948                                              "hwpage_cnt=%lx "
1949                                              "num_hwpages=%lx i=%x",
1950                                              pginfo->kpage_cnt,
1951                                              pginfo->num_kpages,
1952                                              pginfo->hwpage_cnt,
1953                                              pginfo->num_hwpages, i);
1954                                 return -EFAULT;
1955                         }
1956                         *kpage = phys_to_abs(
1957                                 (pbuf->addr & ~(pginfo->hwpage_size - 1)) +
1958                                 (pginfo->next_hwpage * pginfo->hwpage_size));
1959                         if ( !(*kpage) && pbuf->addr ) {
1960                                 ehca_gen_err("pbuf->addr=%lx pbuf->size=%lx "
1961                                              "next_hwpage=%lx", pbuf->addr,
1962                                              pbuf->size, pginfo->next_hwpage);
1963                                 return -EFAULT;
1964                         }
1965                         (pginfo->hwpage_cnt)++;
1966                         (pginfo->next_hwpage)++;
1967                         if (PAGE_SIZE >= pginfo->hwpage_size) {
1968                                 if (pginfo->next_hwpage %
1969                                     (PAGE_SIZE / pginfo->hwpage_size) == 0)
1970                                         (pginfo->kpage_cnt)++;
1971                         } else
1972                                 pginfo->kpage_cnt += pginfo->hwpage_size /
1973                                         PAGE_SIZE;
1974                         kpage++;
1975                         i++;
1976                         if (i >= number) break;
1977                 }
1978                 if (pginfo->next_hwpage >= offs_hw + num_hw) {
1979                         (pginfo->u.phy.next_buf)++;
1980                         pginfo->next_hwpage = 0;
1981                 }
1982         }
1983         return ret;
1984 }
1985
1986 static int ehca_set_pagebuf_fmr(struct ehca_mr_pginfo *pginfo,
1987                                 u32 number, u64 *kpage)
1988 {
1989         int ret = 0;
1990         u64 *fmrlist;
1991         u32 i;
1992
1993         /* loop over desired page_list entries */
1994         fmrlist = pginfo->u.fmr.page_list + pginfo->u.fmr.next_listelem;
1995         for (i = 0; i < number; i++) {
1996                 *kpage = phys_to_abs((*fmrlist & ~(pginfo->hwpage_size - 1)) +
1997                                      pginfo->next_hwpage * pginfo->hwpage_size);
1998                 if ( !(*kpage) ) {
1999                         ehca_gen_err("*fmrlist=%lx fmrlist=%p "
2000                                      "next_listelem=%lx next_hwpage=%lx",
2001                                      *fmrlist, fmrlist,
2002                                      pginfo->u.fmr.next_listelem,
2003                                      pginfo->next_hwpage);
2004                         return -EFAULT;
2005                 }
2006                 (pginfo->hwpage_cnt)++;
2007                 if (pginfo->u.fmr.fmr_pgsize >= pginfo->hwpage_size) {
2008                         if (pginfo->next_hwpage %
2009                             (pginfo->u.fmr.fmr_pgsize /
2010                              pginfo->hwpage_size) == 0) {
2011                                 (pginfo->kpage_cnt)++;
2012                                 (pginfo->u.fmr.next_listelem)++;
2013                                 fmrlist++;
2014                                 pginfo->next_hwpage = 0;
2015                         } else
2016                                 (pginfo->next_hwpage)++;
2017                 } else {
2018                         unsigned int cnt_per_hwpage = pginfo->hwpage_size /
2019                                 pginfo->u.fmr.fmr_pgsize;
2020                         unsigned int j;
2021                         u64 prev = *kpage;
2022                         /* check if adrs are contiguous */
2023                         for (j = 1; j < cnt_per_hwpage; j++) {
2024                                 u64 p = phys_to_abs(fmrlist[j] &
2025                                                     ~(pginfo->hwpage_size - 1));
2026                                 if (prev + pginfo->u.fmr.fmr_pgsize != p) {
2027                                         ehca_gen_err("uncontiguous fmr pages "
2028                                                      "found prev=%lx p=%lx "
2029                                                      "idx=%x", prev, p, i + j);
2030                                         return -EINVAL;
2031                                 }
2032                                 prev = p;
2033                         }
2034                         pginfo->kpage_cnt += cnt_per_hwpage;
2035                         pginfo->u.fmr.next_listelem += cnt_per_hwpage;
2036                         fmrlist += cnt_per_hwpage;
2037                 }
2038                 kpage++;
2039         }
2040         return ret;
2041 }
2042
2043 /* setup page buffer from page info */
2044 int ehca_set_pagebuf(struct ehca_mr_pginfo *pginfo,
2045                      u32 number,
2046                      u64 *kpage)
2047 {
2048         int ret;
2049
2050         switch (pginfo->type) {
2051         case EHCA_MR_PGI_PHYS:
2052                 ret = ehca_set_pagebuf_phys(pginfo, number, kpage);
2053                 break;
2054         case EHCA_MR_PGI_USER:
2055                 ret = PAGE_SIZE >= pginfo->hwpage_size ?
2056                         ehca_set_pagebuf_user1(pginfo, number, kpage) :
2057                         ehca_set_pagebuf_user2(pginfo, number, kpage);
2058                 break;
2059         case EHCA_MR_PGI_FMR:
2060                 ret = ehca_set_pagebuf_fmr(pginfo, number, kpage);
2061                 break;
2062         default:
2063                 ehca_gen_err("bad pginfo->type=%x", pginfo->type);
2064                 ret = -EFAULT;
2065                 break;
2066         }
2067         return ret;
2068 } /* end ehca_set_pagebuf() */
2069
2070 /*----------------------------------------------------------------------*/
2071
2072 /*
2073  * check MR if it is a max-MR, i.e. uses whole memory
2074  * in case it's a max-MR 1 is returned, else 0
2075  */
2076 int ehca_mr_is_maxmr(u64 size,
2077                      u64 *iova_start)
2078 {
2079         /* a MR is treated as max-MR only if it fits following: */
2080         if ((size == ((u64)high_memory - PAGE_OFFSET)) &&
2081             (iova_start == (void *)KERNELBASE)) {
2082                 ehca_gen_dbg("this is a max-MR");
2083                 return 1;
2084         } else
2085                 return 0;
2086 } /* end ehca_mr_is_maxmr() */
2087
2088 /*----------------------------------------------------------------------*/
2089
2090 /* map access control for MR/MW. This routine is used for MR and MW. */
2091 void ehca_mrmw_map_acl(int ib_acl,
2092                        u32 *hipz_acl)
2093 {
2094         *hipz_acl = 0;
2095         if (ib_acl & IB_ACCESS_REMOTE_READ)
2096                 *hipz_acl |= HIPZ_ACCESSCTRL_R_READ;
2097         if (ib_acl & IB_ACCESS_REMOTE_WRITE)
2098                 *hipz_acl |= HIPZ_ACCESSCTRL_R_WRITE;
2099         if (ib_acl & IB_ACCESS_REMOTE_ATOMIC)
2100                 *hipz_acl |= HIPZ_ACCESSCTRL_R_ATOMIC;
2101         if (ib_acl & IB_ACCESS_LOCAL_WRITE)
2102                 *hipz_acl |= HIPZ_ACCESSCTRL_L_WRITE;
2103         if (ib_acl & IB_ACCESS_MW_BIND)
2104                 *hipz_acl |= HIPZ_ACCESSCTRL_MW_BIND;
2105 } /* end ehca_mrmw_map_acl() */
2106
2107 /*----------------------------------------------------------------------*/
2108
2109 /* sets page size in hipz access control for MR/MW. */
2110 void ehca_mrmw_set_pgsize_hipz_acl(u32 pgsize, u32 *hipz_acl) /*INOUT*/
2111 {
2112         *hipz_acl |= (ehca_encode_hwpage_size(pgsize) << 24);
2113 } /* end ehca_mrmw_set_pgsize_hipz_acl() */
2114
2115 /*----------------------------------------------------------------------*/
2116
2117 /*
2118  * reverse map access control for MR/MW.
2119  * This routine is used for MR and MW.
2120  */
2121 void ehca_mrmw_reverse_map_acl(const u32 *hipz_acl,
2122                                int *ib_acl) /*OUT*/
2123 {
2124         *ib_acl = 0;
2125         if (*hipz_acl & HIPZ_ACCESSCTRL_R_READ)
2126                 *ib_acl |= IB_ACCESS_REMOTE_READ;
2127         if (*hipz_acl & HIPZ_ACCESSCTRL_R_WRITE)
2128                 *ib_acl |= IB_ACCESS_REMOTE_WRITE;
2129         if (*hipz_acl & HIPZ_ACCESSCTRL_R_ATOMIC)
2130                 *ib_acl |= IB_ACCESS_REMOTE_ATOMIC;
2131         if (*hipz_acl & HIPZ_ACCESSCTRL_L_WRITE)
2132                 *ib_acl |= IB_ACCESS_LOCAL_WRITE;
2133         if (*hipz_acl & HIPZ_ACCESSCTRL_MW_BIND)
2134                 *ib_acl |= IB_ACCESS_MW_BIND;
2135 } /* end ehca_mrmw_reverse_map_acl() */
2136
2137
2138 /*----------------------------------------------------------------------*/
2139
2140 /*
2141  * MR destructor and constructor
2142  * used in Reregister MR verb, sets all fields in ehca_mr_t to 0,
2143  * except struct ib_mr and spinlock
2144  */
2145 void ehca_mr_deletenew(struct ehca_mr *mr)
2146 {
2147         mr->flags = 0;
2148         mr->num_kpages = 0;
2149         mr->num_hwpages = 0;
2150         mr->acl = 0;
2151         mr->start = NULL;
2152         mr->fmr_page_size = 0;
2153         mr->fmr_max_pages = 0;
2154         mr->fmr_max_maps = 0;
2155         mr->fmr_map_cnt = 0;
2156         memset(&mr->ipz_mr_handle, 0, sizeof(mr->ipz_mr_handle));
2157         memset(&mr->galpas, 0, sizeof(mr->galpas));
2158 } /* end ehca_mr_deletenew() */
2159
2160 int ehca_init_mrmw_cache(void)
2161 {
2162         mr_cache = kmem_cache_create("ehca_cache_mr",
2163                                      sizeof(struct ehca_mr), 0,
2164                                      SLAB_HWCACHE_ALIGN,
2165                                      NULL);
2166         if (!mr_cache)
2167                 return -ENOMEM;
2168         mw_cache = kmem_cache_create("ehca_cache_mw",
2169                                      sizeof(struct ehca_mw), 0,
2170                                      SLAB_HWCACHE_ALIGN,
2171                                      NULL);
2172         if (!mw_cache) {
2173                 kmem_cache_destroy(mr_cache);
2174                 mr_cache = NULL;
2175                 return -ENOMEM;
2176         }
2177         return 0;
2178 }
2179
2180 void ehca_cleanup_mrmw_cache(void)
2181 {
2182         if (mr_cache)
2183                 kmem_cache_destroy(mr_cache);
2184         if (mw_cache)
2185                 kmem_cache_destroy(mw_cache);
2186 }