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 <asm/current.h>
  44
  45 #include <rdma/ib_umem.h>
  46
  47 #include "ehca_iverbs.h"
  48 #include "ehca_mrmw.h"
  49 #include "hcp_if.h"
  50 #include "hipz_hw.h"
  51
  52 #define NUM_CHUNKS(length, chunk_size) \
  53         (((length) + (chunk_size - 1)) / (chunk_size))
  54 /* max number of rpages (per hcall register_rpages) */
  55 #define MAX_RPAGES 512
  56
  57 static struct kmem_cache *mr_cache;
  58 static struct kmem_cache *mw_cache;
  59
  60 enum ehca_mr_pgsize {
  61         EHCA_MR_PGSIZE4K  = 0x1000L,
  62         EHCA_MR_PGSIZE64K = 0x10000L,
  63         EHCA_MR_PGSIZE1M  = 0x100000L,
  64         EHCA_MR_PGSIZE16M = 0x1000000L
  65 };
  66
  67 extern int ehca_mr_largepage;
  68
  69 static u32 ehca_encode_hwpage_size(u32 pgsize)
  70 {
  71         u32 idx = 0;
  72         pgsize >>= 12;
  73         /*
  74          * map mr page size into hw code:
  75          * 0, 1, 2, 3 for 4K, 64K, 1M, 64M
  76          */
  77         while (!(pgsize & 1)) {
  78                 idx++;
  79                 pgsize >>= 4;
  80         }
  81         return idx;
  82 }
  83
  84 static u64 ehca_get_max_hwpage_size(struct ehca_shca *shca)
  85 {
  86         if (shca->hca_cap_mr_pgsize & HCA_CAP_MR_PGSIZE_16M)
  87                 return EHCA_MR_PGSIZE16M;
  88         return EHCA_MR_PGSIZE4K;
  89 }
  90
  91 static struct ehca_mr *ehca_mr_new(void)
  92 {
  93         struct ehca_mr *me;
  94
  95         me = kmem_cache_zalloc(mr_cache, GFP_KERNEL);
  96         if (me)
  97                 spin_lock_init(&me->mrlock);
  98         else
  99                 ehca_gen_err("alloc failed");
 100
 101         return me;
 102 }
 103
 104 static void ehca_mr_delete(struct ehca_mr *me)
 105 {
 106         kmem_cache_free(mr_cache, me);
 107 }
 108
 109 static struct ehca_mw *ehca_mw_new(void)
 110 {
 111         struct ehca_mw *me;
 112
 113         me = kmem_cache_zalloc(mw_cache, GFP_KERNEL);
 114         if (me)
 115                 spin_lock_init(&me->mwlock);
 116         else
 117                 ehca_gen_err("alloc failed");
 118
 119         return me;
 120 }
 121
 122 static void ehca_mw_delete(struct ehca_mw *me)
 123 {
 124         kmem_cache_free(mw_cache, me);
 125 }
 126
 127 /*----------------------------------------------------------------------*/
 128
 129 struct ib_mr *ehca_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
 130 {
 131         struct ib_mr *ib_mr;
 132         int ret;
 133         struct ehca_mr *e_maxmr;
 134         struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
 135         struct ehca_shca *shca =
 136                 container_of(pd->device, struct ehca_shca, ib_device);
 137
 138         if (shca->maxmr) {
 139                 e_maxmr = ehca_mr_new();
 140                 if (!e_maxmr) {
 141                         ehca_err(&shca->ib_device, "out of memory");
 142                         ib_mr = ERR_PTR(-ENOMEM);
 143                         goto get_dma_mr_exit0;
 144                 }
 145
 146                 ret = ehca_reg_maxmr(shca, e_maxmr, (u64 *)KERNELBASE,
 147                                      mr_access_flags, e_pd,
 148                                      &e_maxmr->ib.ib_mr.lkey,
 149                                      &e_maxmr->ib.ib_mr.rkey);
 150                 if (ret) {
 151                         ehca_mr_delete(e_maxmr);
 152                         ib_mr = ERR_PTR(ret);
 153                         goto get_dma_mr_exit0;
 154                 }
 155                 ib_mr = &e_maxmr->ib.ib_mr;
 156         } else {
 157                 ehca_err(&shca->ib_device, "no internal max-MR exist!");
 158                 ib_mr = ERR_PTR(-EINVAL);
 159                 goto get_dma_mr_exit0;
 160         }
 161
 162 get_dma_mr_exit0:
 163         if (IS_ERR(ib_mr))
 164                 ehca_err(&shca->ib_device, "rc=%lx pd=%p mr_access_flags=%x ",
 165                          PTR_ERR(ib_mr), pd, mr_access_flags);
 166         return ib_mr;
 167 } /* end ehca_get_dma_mr() */
 168
 169 /*----------------------------------------------------------------------*/
 170
 171 struct ib_mr *ehca_reg_phys_mr(struct ib_pd *pd,
 172                                struct ib_phys_buf *phys_buf_array,
 173                                int num_phys_buf,
 174                                int mr_access_flags,
 175                                u64 *iova_start)
 176 {
 177         struct ib_mr *ib_mr;
 178         int ret;
 179         struct ehca_mr *e_mr;
 180         struct ehca_shca *shca =
 181                 container_of(pd->device, struct ehca_shca, ib_device);
 182         struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
 183
 184         u64 size;
 185
 186         if ((num_phys_buf <= 0) || !phys_buf_array) {
 187                 ehca_err(pd->device, "bad input values: num_phys_buf=%x "
 188                          "phys_buf_array=%p", num_phys_buf, phys_buf_array);
 189                 ib_mr = ERR_PTR(-EINVAL);
 190                 goto reg_phys_mr_exit0;
 191         }
 192         if (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
 193              !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
 194             ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
 195              !(mr_access_flags & IB_ACCESS_LOCAL_WRITE))) {
 196                 /*
 197                  * Remote Write Access requires Local Write Access
 198                  * Remote Atomic Access requires Local Write Access
 199                  */
 200                 ehca_err(pd->device, "bad input values: mr_access_flags=%x",
 201                          mr_access_flags);
 202                 ib_mr = ERR_PTR(-EINVAL);
 203                 goto reg_phys_mr_exit0;
 204         }
 205
 206         /* check physical buffer list and calculate size */
 207         ret = ehca_mr_chk_buf_and_calc_size(phys_buf_array, num_phys_buf,
 208                                             iova_start, &size);
 209         if (ret) {
 210                 ib_mr = ERR_PTR(ret);
 211                 goto reg_phys_mr_exit0;
 212         }
 213         if ((size == 0) ||
 214             (((u64)iova_start + size) < (u64)iova_start)) {
 215                 ehca_err(pd->device, "bad input values: size=%lx iova_start=%p",
 216                          size, iova_start);
 217                 ib_mr = ERR_PTR(-EINVAL);
 218                 goto reg_phys_mr_exit0;
 219         }
 220
 221         e_mr = ehca_mr_new();
 222         if (!e_mr) {
 223                 ehca_err(pd->device, "out of memory");
 224                 ib_mr = ERR_PTR(-ENOMEM);
 225                 goto reg_phys_mr_exit0;
 226         }
 227
 228         /* register MR on HCA */
 229         if (ehca_mr_is_maxmr(size, iova_start)) {
 230                 e_mr->flags |= EHCA_MR_FLAG_MAXMR;
 231                 ret = ehca_reg_maxmr(shca, e_mr, iova_start, mr_access_flags,
 232                                      e_pd, &e_mr->ib.ib_mr.lkey,
 233                                      &e_mr->ib.ib_mr.rkey);
 234                 if (ret) {
 235                         ib_mr = ERR_PTR(ret);
 236                         goto reg_phys_mr_exit1;
 237                 }
 238         } else {
 239                 struct ehca_mr_pginfo pginfo;
 240                 u32 num_kpages;
 241                 u32 num_hwpages;
 242                 u64 hw_pgsize;
 243
 244                 num_kpages = NUM_CHUNKS(((u64)iova_start % PAGE_SIZE) + size,
 245                                         PAGE_SIZE);
 246                 /* for kernel space we try most possible pgsize */
 247                 hw_pgsize = ehca_get_max_hwpage_size(shca);
 248                 num_hwpages = NUM_CHUNKS(((u64)iova_start % hw_pgsize) + size,
 249                                          hw_pgsize);
 250                 memset(&pginfo, 0, sizeof(pginfo));
 251                 pginfo.type = EHCA_MR_PGI_PHYS;
 252                 pginfo.num_kpages = num_kpages;
 253                 pginfo.hwpage_size = hw_pgsize;
 254                 pginfo.num_hwpages = num_hwpages;
 255                 pginfo.u.phy.num_phys_buf = num_phys_buf;
 256                 pginfo.u.phy.phys_buf_array = phys_buf_array;
 257                 pginfo.next_hwpage =
 258                         ((u64)iova_start & ~(hw_pgsize - 1)) / hw_pgsize;
 259
 260                 ret = ehca_reg_mr(shca, e_mr, iova_start, size, mr_access_flags,
 261                                   e_pd, &pginfo, &e_mr->ib.ib_mr.lkey,
 262                                   &e_mr->ib.ib_mr.rkey);
 263                 if (ret) {
 264                         ib_mr = ERR_PTR(ret);
 265                         goto reg_phys_mr_exit1;
 266                 }
 267         }
 268
 269         /* successful registration of all pages */
 270         return &e_mr->ib.ib_mr;
 271
 272 reg_phys_mr_exit1:
 273         ehca_mr_delete(e_mr);
 274 reg_phys_mr_exit0:
 275         if (IS_ERR(ib_mr))
 276                 ehca_err(pd->device, "rc=%lx pd=%p phys_buf_array=%p "
 277                          "num_phys_buf=%x mr_access_flags=%x iova_start=%p",
 278                          PTR_ERR(ib_mr), pd, phys_buf_array,
 279                          num_phys_buf, mr_access_flags, iova_start);
 280         return ib_mr;
 281 } /* end ehca_reg_phys_mr() */
 282
 283 /*----------------------------------------------------------------------*/
 284
 285 struct ib_mr *ehca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
 286                                u64 virt, int mr_access_flags,
 287                                struct ib_udata *udata)
 288 {
 289         struct ib_mr *ib_mr;
 290         struct ehca_mr *e_mr;
 291         struct ehca_shca *shca =
 292                 container_of(pd->device, struct ehca_shca, ib_device);
 293         struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
 294         struct ehca_mr_pginfo pginfo;
 295         int ret;
 296         u32 num_kpages;
 297         u32 num_hwpages;
 298         u64 hwpage_size;
 299
 300         if (!pd) {
 301                 ehca_gen_err("bad pd=%p", pd);
 302                 return ERR_PTR(-EFAULT);
 303         }
 304
 305         if (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
 306              !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
 307             ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
 308              !(mr_access_flags & IB_ACCESS_LOCAL_WRITE))) {
 309                 /*
 310                  * Remote Write Access requires Local Write Access
 311                  * Remote Atomic Access requires Local Write Access
 312                  */
 313                 ehca_err(pd->device, "bad input values: mr_access_flags=%x",
 314                          mr_access_flags);
 315                 ib_mr = ERR_PTR(-EINVAL);
 316                 goto reg_user_mr_exit0;
 317         }
 318
 319         if (length == 0 || virt + length < virt) {
 320                 ehca_err(pd->device, "bad input values: length=%lx "
 321                          "virt_base=%lx", length, virt);
 322                 ib_mr = ERR_PTR(-EINVAL);
 323                 goto reg_user_mr_exit0;
 324         }
 325
 326         e_mr = ehca_mr_new();
 327         if (!e_mr) {
 328                 ehca_err(pd->device, "out of memory");
 329                 ib_mr = ERR_PTR(-ENOMEM);
 330                 goto reg_user_mr_exit0;
 331         }
 332
 333         e_mr->umem = ib_umem_get(pd->uobject->context, start, length,
 334                                  mr_access_flags);
 335         if (IS_ERR(e_mr->umem)) {
 336                 ib_mr = (void *)e_mr->umem;
 337                 goto reg_user_mr_exit1;
 338         }
 339
 340         if (e_mr->umem->page_size != PAGE_SIZE) {
 341                 ehca_err(pd->device, "page size not supported, "
 342                          "e_mr->umem->page_size=%x", e_mr->umem->page_size);
 343                 ib_mr = ERR_PTR(-EINVAL);
 344                 goto reg_user_mr_exit2;
 345         }
 346
 347         /* determine number of MR pages */
 348         num_kpages = NUM_CHUNKS((virt % PAGE_SIZE) + length, PAGE_SIZE);
 349         /* select proper hw_pgsize */
 350         if (ehca_mr_largepage &&
 351             (shca->hca_cap_mr_pgsize & HCA_CAP_MR_PGSIZE_16M)) {
 352                 if (length <= EHCA_MR_PGSIZE4K
 353                     && PAGE_SIZE == EHCA_MR_PGSIZE4K)
 354                         hwpage_size = EHCA_MR_PGSIZE4K;
 355                 else if (length <= EHCA_MR_PGSIZE64K)
 356                         hwpage_size = EHCA_MR_PGSIZE64K;
 357                 else if (length <= EHCA_MR_PGSIZE1M)
 358                         hwpage_size = EHCA_MR_PGSIZE1M;
 359                 else
 360                         hwpage_size = EHCA_MR_PGSIZE16M;
 361         } else
 362                 hwpage_size = EHCA_MR_PGSIZE4K;
 363         ehca_dbg(pd->device, "hwpage_size=%lx", hwpage_size);
 364
 365 reg_user_mr_fallback:
 366         num_hwpages = NUM_CHUNKS((virt % hwpage_size) + length, hwpage_size);
 367         /* register MR on HCA */
 368         memset(&pginfo, 0, sizeof(pginfo));
 369         pginfo.type = EHCA_MR_PGI_USER;
 370         pginfo.hwpage_size = hwpage_size;
 371         pginfo.num_kpages = num_kpages;
 372         pginfo.num_hwpages = num_hwpages;
 373         pginfo.u.usr.region = e_mr->umem;
 374         pginfo.next_hwpage = e_mr->umem->offset / hwpage_size;
 375         pginfo.u.usr.next_chunk = list_prepare_entry(pginfo.u.usr.next_chunk,
 376                                                      (&e_mr->umem->chunk_list),
 377                                                      list);
 378
 379         ret = ehca_reg_mr(shca, e_mr, (u64 *)virt, length, mr_access_flags,
 380                           e_pd, &pginfo, &e_mr->ib.ib_mr.lkey,
 381                           &e_mr->ib.ib_mr.rkey);
 382         if (ret == -EINVAL && pginfo.hwpage_size > PAGE_SIZE) {
 383                 ehca_warn(pd->device, "failed to register mr "
 384                           "with hwpage_size=%lx", hwpage_size);
 385                 ehca_info(pd->device, "try to register mr with "
 386                           "kpage_size=%lx", PAGE_SIZE);
 387                 /*
 388                  * this means kpages are not contiguous for a hw page
 389                  * try kernel page size as fallback solution
 390                  */
 391                 hwpage_size = PAGE_SIZE;
 392                 goto reg_user_mr_fallback;
 393         }
 394         if (ret) {
 395                 ib_mr = ERR_PTR(ret);
 396                 goto reg_user_mr_exit2;
 397         }
 398
 399         /* successful registration of all pages */
 400         return &e_mr->ib.ib_mr;
 401
 402 reg_user_mr_exit2:
 403         ib_umem_release(e_mr->umem);
 404 reg_user_mr_exit1:
 405         ehca_mr_delete(e_mr);
 406 reg_user_mr_exit0:
 407         if (IS_ERR(ib_mr))
 408                 ehca_err(pd->device, "rc=%lx pd=%p mr_access_flags=%x"
 409                          " udata=%p",
 410                          PTR_ERR(ib_mr), pd, mr_access_flags, udata);
 411         return ib_mr;
 412 } /* end ehca_reg_user_mr() */
 413
 414 /*----------------------------------------------------------------------*/
 415
 416 int ehca_rereg_phys_mr(struct ib_mr *mr,
 417                        int mr_rereg_mask,
 418                        struct ib_pd *pd,
 419                        struct ib_phys_buf *phys_buf_array,
 420                        int num_phys_buf,
 421                        int mr_access_flags,
 422                        u64 *iova_start)
 423 {
 424         int ret;
 425
 426         struct ehca_shca *shca =
 427                 container_of(mr->device, struct ehca_shca, ib_device);
 428         struct ehca_mr *e_mr = container_of(mr, struct ehca_mr, ib.ib_mr);
 429         struct ehca_pd *my_pd = container_of(mr->pd, struct ehca_pd, ib_pd);
 430         u64 new_size;
 431         u64 *new_start;
 432         u32 new_acl;
 433         struct ehca_pd *new_pd;
 434         u32 tmp_lkey, tmp_rkey;
 435         unsigned long sl_flags;
 436         u32 num_kpages = 0;
 437         u32 num_hwpages = 0;
 438         struct ehca_mr_pginfo pginfo;
 439         u32 cur_pid = current->tgid;
 440
 441         if (my_pd->ib_pd.uobject && my_pd->ib_pd.uobject->context &&
 442             (my_pd->ownpid != cur_pid)) {
 443                 ehca_err(mr->device, "Invalid caller pid=%x ownpid=%x",
 444                          cur_pid, my_pd->ownpid);
 445                 ret = -EINVAL;
 446                 goto rereg_phys_mr_exit0;
 447         }
 448
 449         if (!(mr_rereg_mask & IB_MR_REREG_TRANS)) {
 450                 /* TODO not supported, because PHYP rereg hCall needs pages */
 451                 ehca_err(mr->device, "rereg without IB_MR_REREG_TRANS not "
 452                          "supported yet, mr_rereg_mask=%x", mr_rereg_mask);
 453                 ret = -EINVAL;
 454                 goto rereg_phys_mr_exit0;
 455         }
 456
 457         if (mr_rereg_mask & IB_MR_REREG_PD) {
 458                 if (!pd) {
 459                         ehca_err(mr->device, "rereg with bad pd, pd=%p "
 460                                  "mr_rereg_mask=%x", pd, mr_rereg_mask);
 461                         ret = -EINVAL;
 462                         goto rereg_phys_mr_exit0;
 463                 }
 464         }
 465
 466         if ((mr_rereg_mask &
 467              ~(IB_MR_REREG_TRANS | IB_MR_REREG_PD | IB_MR_REREG_ACCESS)) ||
 468             (mr_rereg_mask == 0)) {
 469                 ret = -EINVAL;
 470                 goto rereg_phys_mr_exit0;
 471         }
 472
 473         /* check other parameters */
 474         if (e_mr == shca->maxmr) {
 475                 /* should be impossible, however reject to be sure */
 476                 ehca_err(mr->device, "rereg internal max-MR impossible, mr=%p "
 477                          "shca->maxmr=%p mr->lkey=%x",
 478                          mr, shca->maxmr, mr->lkey);
 479                 ret = -EINVAL;
 480                 goto rereg_phys_mr_exit0;
 481         }
 482         if (mr_rereg_mask & IB_MR_REREG_TRANS) { /* transl., i.e. addr/size */
 483                 if (e_mr->flags & EHCA_MR_FLAG_FMR) {
 484                         ehca_err(mr->device, "not supported for FMR, mr=%p "
 485                                  "flags=%x", mr, e_mr->flags);
 486                         ret = -EINVAL;
 487                         goto rereg_phys_mr_exit0;
 488                 }
 489                 if (!phys_buf_array || num_phys_buf <= 0) {
 490                         ehca_err(mr->device, "bad input values mr_rereg_mask=%x"
 491                                  " phys_buf_array=%p num_phys_buf=%x",
 492                                  mr_rereg_mask, phys_buf_array, num_phys_buf);
 493                         ret = -EINVAL;
 494                         goto rereg_phys_mr_exit0;
 495                 }
 496         }
 497         if ((mr_rereg_mask & IB_MR_REREG_ACCESS) &&     /* change ACL */
 498             (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
 499               !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
 500              ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
 501               !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)))) {
 502                 /*
 503                  * Remote Write Access requires Local Write Access
 504                  * Remote Atomic Access requires Local Write Access
 505                  */
 506                 ehca_err(mr->device, "bad input values: mr_rereg_mask=%x "
 507                          "mr_access_flags=%x", mr_rereg_mask, mr_access_flags);
 508                 ret = -EINVAL;
 509                 goto rereg_phys_mr_exit0;
 510         }
 511
 512         /* set requested values dependent on rereg request */
 513         spin_lock_irqsave(&e_mr->mrlock, sl_flags);
 514         new_start = e_mr->start;
 515         new_size = e_mr->size;
 516         new_acl = e_mr->acl;
 517         new_pd = container_of(mr->pd, struct ehca_pd, ib_pd);
 518
 519         if (mr_rereg_mask & IB_MR_REREG_TRANS) {
 520                 u64 hw_pgsize = ehca_get_max_hwpage_size(shca);
 521
 522                 new_start = iova_start; /* change address */
 523                 /* check physical buffer list and calculate size */
 524                 ret = ehca_mr_chk_buf_and_calc_size(phys_buf_array,
 525                                                     num_phys_buf, iova_start,
 526                                                     &new_size);
 527                 if (ret)
 528                         goto rereg_phys_mr_exit1;
 529                 if ((new_size == 0) ||
 530                     (((u64)iova_start + new_size) < (u64)iova_start)) {
 531                         ehca_err(mr->device, "bad input values: new_size=%lx "
 532                                  "iova_start=%p", new_size, iova_start);
 533                         ret = -EINVAL;
 534                         goto rereg_phys_mr_exit1;
 535                 }
 536                 num_kpages = NUM_CHUNKS(((u64)new_start % PAGE_SIZE) +
 537                                         new_size, PAGE_SIZE);
 538                 num_hwpages = NUM_CHUNKS(((u64)new_start % hw_pgsize) +
 539                                          new_size, hw_pgsize);
 540                 memset(&pginfo, 0, sizeof(pginfo));
 541                 pginfo.type = EHCA_MR_PGI_PHYS;
 542                 pginfo.num_kpages = num_kpages;
 543                 pginfo.hwpage_size = hw_pgsize;
 544                 pginfo.num_hwpages = num_hwpages;
 545                 pginfo.u.phy.num_phys_buf = num_phys_buf;
 546                 pginfo.u.phy.phys_buf_array = phys_buf_array;
 547                 pginfo.next_hwpage =
 548                         ((u64)iova_start & ~(hw_pgsize - 1)) / hw_pgsize;
 549         }
 550         if (mr_rereg_mask & IB_MR_REREG_ACCESS)
 551                 new_acl = mr_access_flags;
 552         if (mr_rereg_mask & IB_MR_REREG_PD)
 553                 new_pd = container_of(pd, struct ehca_pd, ib_pd);
 554
 555         ret = ehca_rereg_mr(shca, e_mr, new_start, new_size, new_acl,
 556                             new_pd, &pginfo, &tmp_lkey, &tmp_rkey);
 557         if (ret)
 558                 goto rereg_phys_mr_exit1;
 559
 560         /* successful reregistration */
 561         if (mr_rereg_mask & IB_MR_REREG_PD)
 562                 mr->pd = pd;
 563         mr->lkey = tmp_lkey;
 564         mr->rkey = tmp_rkey;
 565
 566 rereg_phys_mr_exit1:
 567         spin_unlock_irqrestore(&e_mr->mrlock, sl_flags);
 568 rereg_phys_mr_exit0:
 569         if (ret)
 570                 ehca_err(mr->device, "ret=%x mr=%p mr_rereg_mask=%x pd=%p "
 571                          "phys_buf_array=%p num_phys_buf=%x mr_access_flags=%x "
 572                          "iova_start=%p",
 573                          ret, mr, mr_rereg_mask, pd, phys_buf_array,
 574                          num_phys_buf, mr_access_flags, iova_start);
 575         return ret;
 576 } /* end ehca_rereg_phys_mr() */
 577
 578 /*----------------------------------------------------------------------*/
 579
 580 int ehca_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr)
 581 {
 582         int ret = 0;
 583         u64 h_ret;
 584         struct ehca_shca *shca =
 585                 container_of(mr->device, struct ehca_shca, ib_device);
 586         struct ehca_mr *e_mr = container_of(mr, struct ehca_mr, ib.ib_mr);
 587         struct ehca_pd *my_pd = container_of(mr->pd, struct ehca_pd, ib_pd);
 588         u32 cur_pid = current->tgid;
 589         unsigned long sl_flags;
 590         struct ehca_mr_hipzout_parms hipzout;
 591
 592         if (my_pd->ib_pd.uobject && my_pd->ib_pd.uobject->context &&
 593             (my_pd->ownpid != cur_pid)) {
 594                 ehca_err(mr->device, "Invalid caller pid=%x ownpid=%x",
 595                          cur_pid, my_pd->ownpid);
 596                 ret = -EINVAL;
 597                 goto query_mr_exit0;
 598         }
 599
 600         if ((e_mr->flags & EHCA_MR_FLAG_FMR)) {
 601                 ehca_err(mr->device, "not supported for FMR, mr=%p e_mr=%p "
 602                          "e_mr->flags=%x", mr, e_mr, e_mr->flags);
 603                 ret = -EINVAL;
 604                 goto query_mr_exit0;
 605         }
 606
 607         memset(mr_attr, 0, sizeof(struct ib_mr_attr));
 608         spin_lock_irqsave(&e_mr->mrlock, sl_flags);
 609
 610         h_ret = hipz_h_query_mr(shca->ipz_hca_handle, e_mr, &hipzout);
 611         if (h_ret != H_SUCCESS) {
 612                 ehca_err(mr->device, "hipz_mr_query failed, h_ret=%lx mr=%p "
 613                          "hca_hndl=%lx mr_hndl=%lx lkey=%x",
 614                          h_ret, mr, shca->ipz_hca_handle.handle,
 615                          e_mr->ipz_mr_handle.handle, mr->lkey);
 616                 ret = ehca2ib_return_code(h_ret);
 617                 goto query_mr_exit1;
 618         }
 619         mr_attr->pd = mr->pd;
 620         mr_attr->device_virt_addr = hipzout.vaddr;
 621         mr_attr->size = hipzout.len;
 622         mr_attr->lkey = hipzout.lkey;
 623         mr_attr->rkey = hipzout.rkey;
 624         ehca_mrmw_reverse_map_acl(&hipzout.acl, &mr_attr->mr_access_flags);
 625
 626 query_mr_exit1:
 627         spin_unlock_irqrestore(&e_mr->mrlock, sl_flags);
 628 query_mr_exit0:
 629         if (ret)
 630                 ehca_err(mr->device, "ret=%x mr=%p mr_attr=%p",
 631                          ret, mr, mr_attr);
 632         return ret;
 633 } /* end ehca_query_mr() */
 634
 635 /*----------------------------------------------------------------------*/
 636
 637 int ehca_dereg_mr(struct ib_mr *mr)
 638 {
 639         int ret = 0;
 640         u64 h_ret;
 641         struct ehca_shca *shca =
 642                 container_of(mr->device, struct ehca_shca, ib_device);
 643         struct ehca_mr *e_mr = container_of(mr, struct ehca_mr, ib.ib_mr);
 644         struct ehca_pd *my_pd = container_of(mr->pd, struct ehca_pd, ib_pd);
 645         u32 cur_pid = current->tgid;
 646
 647         if (my_pd->ib_pd.uobject && my_pd->ib_pd.uobject->context &&
 648             (my_pd->ownpid != cur_pid)) {
 649                 ehca_err(mr->device, "Invalid caller pid=%x ownpid=%x",
 650                          cur_pid, my_pd->ownpid);
 651                 ret = -EINVAL;
 652                 goto dereg_mr_exit0;
 653         }
 654
 655         if ((e_mr->flags & EHCA_MR_FLAG_FMR)) {
 656                 ehca_err(mr->device, "not supported for FMR, mr=%p e_mr=%p "
 657                          "e_mr->flags=%x", mr, e_mr, e_mr->flags);
 658                 ret = -EINVAL;
 659                 goto dereg_mr_exit0;
 660         } else if (e_mr == shca->maxmr) {
 661                 /* should be impossible, however reject to be sure */
 662                 ehca_err(mr->device, "dereg internal max-MR impossible, mr=%p "
 663                          "shca->maxmr=%p mr->lkey=%x",
 664                          mr, shca->maxmr, mr->lkey);
 665                 ret = -EINVAL;
 666                 goto dereg_mr_exit0;
 667         }
 668
 669         /* TODO: BUSY: MR still has bound window(s) */
 670         h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_mr);
 671         if (h_ret != H_SUCCESS) {
 672                 ehca_err(mr->device, "hipz_free_mr failed, h_ret=%lx shca=%p "
 673                          "e_mr=%p hca_hndl=%lx mr_hndl=%lx mr->lkey=%x",
 674                          h_ret, shca, e_mr, shca->ipz_hca_handle.handle,
 675                          e_mr->ipz_mr_handle.handle, mr->lkey);
 676                 ret = ehca2ib_return_code(h_ret);
 677                 goto dereg_mr_exit0;
 678         }
 679
 680         if (e_mr->umem)
 681                 ib_umem_release(e_mr->umem);
 682
 683         /* successful deregistration */
 684         ehca_mr_delete(e_mr);
 685
 686 dereg_mr_exit0:
 687         if (ret)
 688                 ehca_err(mr->device, "ret=%x mr=%p", ret, mr);
 689         return ret;
 690 } /* end ehca_dereg_mr() */
 691
 692 /*----------------------------------------------------------------------*/
 693
 694 struct ib_mw *ehca_alloc_mw(struct ib_pd *pd)
 695 {
 696         struct ib_mw *ib_mw;
 697         u64 h_ret;
 698         struct ehca_mw *e_mw;
 699         struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
 700         struct ehca_shca *shca =
 701                 container_of(pd->device, struct ehca_shca, ib_device);
 702         struct ehca_mw_hipzout_parms hipzout;
 703
 704         e_mw = ehca_mw_new();
 705         if (!e_mw) {
 706                 ib_mw = ERR_PTR(-ENOMEM);
 707                 goto alloc_mw_exit0;
 708         }
 709
 710         h_ret = hipz_h_alloc_resource_mw(shca->ipz_hca_handle, e_mw,
 711                                          e_pd->fw_pd, &hipzout);
 712         if (h_ret != H_SUCCESS) {
 713                 ehca_err(pd->device, "hipz_mw_allocate failed, h_ret=%lx "
 714                          "shca=%p hca_hndl=%lx mw=%p",
 715                          h_ret, shca, shca->ipz_hca_handle.handle, e_mw);
 716                 ib_mw = ERR_PTR(ehca2ib_return_code(h_ret));
 717                 goto alloc_mw_exit1;
 718         }
 719         /* successful MW allocation */
 720         e_mw->ipz_mw_handle = hipzout.handle;
 721         e_mw->ib_mw.rkey    = hipzout.rkey;
 722         return &e_mw->ib_mw;
 723
 724 alloc_mw_exit1:
 725         ehca_mw_delete(e_mw);
 726 alloc_mw_exit0:
 727         if (IS_ERR(ib_mw))
 728                 ehca_err(pd->device, "rc=%lx pd=%p", PTR_ERR(ib_mw), pd);
 729         return ib_mw;
 730 } /* end ehca_alloc_mw() */
 731
 732 /*----------------------------------------------------------------------*/
 733
 734 int ehca_bind_mw(struct ib_qp *qp,
 735                  struct ib_mw *mw,
 736                  struct ib_mw_bind *mw_bind)
 737 {
 738         /* TODO: not supported up to now */
 739         ehca_gen_err("bind MW currently not supported by HCAD");
 740
 741         return -EPERM;
 742 } /* end ehca_bind_mw() */
 743
 744 /*----------------------------------------------------------------------*/
 745
 746 int ehca_dealloc_mw(struct ib_mw *mw)
 747 {
 748         u64 h_ret;
 749         struct ehca_shca *shca =
 750                 container_of(mw->device, struct ehca_shca, ib_device);
 751         struct ehca_mw *e_mw = container_of(mw, struct ehca_mw, ib_mw);
 752
 753         h_ret = hipz_h_free_resource_mw(shca->ipz_hca_handle, e_mw);
 754         if (h_ret != H_SUCCESS) {
 755                 ehca_err(mw->device, "hipz_free_mw failed, h_ret=%lx shca=%p "
 756                          "mw=%p rkey=%x hca_hndl=%lx mw_hndl=%lx",
 757                          h_ret, shca, mw, mw->rkey, shca->ipz_hca_handle.handle,
 758                          e_mw->ipz_mw_handle.handle);
 759                 return ehca2ib_return_code(h_ret);
 760         }
 761         /* successful deallocation */
 762         ehca_mw_delete(e_mw);
 763         return 0;
 764 } /* end ehca_dealloc_mw() */
 765
 766 /*----------------------------------------------------------------------*/
 767
 768 struct ib_fmr *ehca_alloc_fmr(struct ib_pd *pd,
 769                               int mr_access_flags,
 770                               struct ib_fmr_attr *fmr_attr)
 771 {
 772         struct ib_fmr *ib_fmr;
 773         struct ehca_shca *shca =
 774                 container_of(pd->device, struct ehca_shca, ib_device);
 775         struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
 776         struct ehca_mr *e_fmr;
 777         int ret;
 778         u32 tmp_lkey, tmp_rkey;
 779         struct ehca_mr_pginfo pginfo;
 780         u64 hw_pgsize;
 781
 782         /* check other parameters */
 783         if (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
 784              !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
 785             ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
 786              !(mr_access_flags & IB_ACCESS_LOCAL_WRITE))) {
 787                 /*
 788                  * Remote Write Access requires Local Write Access
 789                  * Remote Atomic Access requires Local Write Access
 790                  */
 791                 ehca_err(pd->device, "bad input values: mr_access_flags=%x",
 792                          mr_access_flags);
 793                 ib_fmr = ERR_PTR(-EINVAL);
 794                 goto alloc_fmr_exit0;
 795         }
 796         if (mr_access_flags & IB_ACCESS_MW_BIND) {
 797                 ehca_err(pd->device, "bad input values: mr_access_flags=%x",
 798                          mr_access_flags);
 799                 ib_fmr = ERR_PTR(-EINVAL);
 800                 goto alloc_fmr_exit0;
 801         }
 802         if ((fmr_attr->max_pages == 0) || (fmr_attr->max_maps == 0)) {
 803                 ehca_err(pd->device, "bad input values: fmr_attr->max_pages=%x "
 804                          "fmr_attr->max_maps=%x fmr_attr->page_shift=%x",
 805                          fmr_attr->max_pages, fmr_attr->max_maps,
 806                          fmr_attr->page_shift);
 807                 ib_fmr = ERR_PTR(-EINVAL);
 808                 goto alloc_fmr_exit0;
 809         }
 810         hw_pgsize = ehca_get_max_hwpage_size(shca);
 811         if ((1 << fmr_attr->page_shift) != hw_pgsize) {
 812                 ehca_err(pd->device, "unsupported fmr_attr->page_shift=%x",
 813                          fmr_attr->page_shift);
 814                 ib_fmr = ERR_PTR(-EINVAL);
 815                 goto alloc_fmr_exit0;
 816         }
 817
 818         e_fmr = ehca_mr_new();
 819         if (!e_fmr) {
 820                 ib_fmr = ERR_PTR(-ENOMEM);
 821                 goto alloc_fmr_exit0;
 822         }
 823         e_fmr->flags |= EHCA_MR_FLAG_FMR;
 824
 825         /* register MR on HCA */
 826         memset(&pginfo, 0, sizeof(pginfo));
 827         /*
 828          * pginfo.num_hwpages==0, ie register_rpages() will not be called
 829          * but deferred to map_phys_fmr()
 830          */
 831         ret = ehca_reg_mr(shca, e_fmr, NULL,
 832                           fmr_attr->max_pages * (1 << fmr_attr->page_shift),
 833                           mr_access_flags, e_pd, &pginfo,
 834                           &tmp_lkey, &tmp_rkey);
 835         if (ret) {
 836                 ib_fmr = ERR_PTR(ret);
 837                 goto alloc_fmr_exit1;
 838         }
 839
 840         /* successful */
 841         e_fmr->hwpage_size = hw_pgsize;
 842         e_fmr->fmr_page_size = 1 << fmr_attr->page_shift;
 843         e_fmr->fmr_max_pages = fmr_attr->max_pages;
 844         e_fmr->fmr_max_maps = fmr_attr->max_maps;
 845         e_fmr->fmr_map_cnt = 0;
 846         return &e_fmr->ib.ib_fmr;
 847
 848 alloc_fmr_exit1:
 849         ehca_mr_delete(e_fmr);
 850 alloc_fmr_exit0:
 851         if (IS_ERR(ib_fmr))
 852                 ehca_err(pd->device, "rc=%lx pd=%p mr_access_flags=%x "
 853                          "fmr_attr=%p", PTR_ERR(ib_fmr), pd,
 854                          mr_access_flags, fmr_attr);
 855         return ib_fmr;
 856 } /* end ehca_alloc_fmr() */
 857
 858 /*----------------------------------------------------------------------*/
 859
 860 int ehca_map_phys_fmr(struct ib_fmr *fmr,
 861                       u64 *page_list,
 862                       int list_len,
 863                       u64 iova)
 864 {
 865         int ret;
 866         struct ehca_shca *shca =
 867                 container_of(fmr->device, struct ehca_shca, ib_device);
 868         struct ehca_mr *e_fmr = container_of(fmr, struct ehca_mr, ib.ib_fmr);
 869         struct ehca_pd *e_pd = container_of(fmr->pd, struct ehca_pd, ib_pd);
 870         struct ehca_mr_pginfo pginfo;
 871         u32 tmp_lkey, tmp_rkey;
 872
 873         if (!(e_fmr->flags & EHCA_MR_FLAG_FMR)) {
 874                 ehca_err(fmr->device, "not a FMR, e_fmr=%p e_fmr->flags=%x",
 875                          e_fmr, e_fmr->flags);
 876                 ret = -EINVAL;
 877                 goto map_phys_fmr_exit0;
 878         }
 879         ret = ehca_fmr_check_page_list(e_fmr, page_list, list_len);
 880         if (ret)
 881                 goto map_phys_fmr_exit0;
 882         if (iova % e_fmr->fmr_page_size) {
 883                 /* only whole-numbered pages */
 884                 ehca_err(fmr->device, "bad iova, iova=%lx fmr_page_size=%x",
 885                          iova, e_fmr->fmr_page_size);
 886                 ret = -EINVAL;
 887                 goto map_phys_fmr_exit0;
 888         }
 889         if (e_fmr->fmr_map_cnt >= e_fmr->fmr_max_maps) {
 890                 /* HCAD does not limit the maps, however trace this anyway */
 891                 ehca_info(fmr->device, "map limit exceeded, fmr=%p "
 892                           "e_fmr->fmr_map_cnt=%x e_fmr->fmr_max_maps=%x",
 893                           fmr, e_fmr->fmr_map_cnt, e_fmr->fmr_max_maps);
 894         }
 895
 896         memset(&pginfo, 0, sizeof(pginfo));
 897         pginfo.type = EHCA_MR_PGI_FMR;
 898         pginfo.num_kpages = list_len;
 899         pginfo.hwpage_size = e_fmr->hwpage_size;
 900         pginfo.num_hwpages =
 901                 list_len * e_fmr->fmr_page_size / pginfo.hwpage_size;
 902         pginfo.u.fmr.page_list = page_list;
 903         pginfo.next_hwpage =
 904                 (iova & (e_fmr->fmr_page_size-1)) / pginfo.hwpage_size;
 905         pginfo.u.fmr.fmr_pgsize = e_fmr->fmr_page_size;
 906
 907         ret = ehca_rereg_mr(shca, e_fmr, (u64 *)iova,
 908                             list_len * e_fmr->fmr_page_size,
 909                             e_fmr->acl, e_pd, &pginfo, &tmp_lkey, &tmp_rkey);
 910         if (ret)
 911                 goto map_phys_fmr_exit0;
 912
 913         /* successful reregistration */
 914         e_fmr->fmr_map_cnt++;
 915         e_fmr->ib.ib_fmr.lkey = tmp_lkey;
 916         e_fmr->ib.ib_fmr.rkey = tmp_rkey;
 917         return 0;
 918
 919 map_phys_fmr_exit0:
 920         if (ret)
 921                 ehca_err(fmr->device, "ret=%x fmr=%p page_list=%p list_len=%x "
 922                          "iova=%lx", ret, fmr, page_list, list_len, iova);
 923         return ret;
 924 } /* end ehca_map_phys_fmr() */
 925
 926 /*----------------------------------------------------------------------*/
 927
 928 int ehca_unmap_fmr(struct list_head *fmr_list)
 929 {
 930         int ret = 0;
 931         struct ib_fmr *ib_fmr;
 932         struct ehca_shca *shca = NULL;
 933         struct ehca_shca *prev_shca;
 934         struct ehca_mr *e_fmr;
 935         u32 num_fmr = 0;
 936         u32 unmap_fmr_cnt = 0;
 937
 938         /* check all FMR belong to same SHCA, and check internal flag */
 939         list_for_each_entry(ib_fmr, fmr_list, list) {
 940                 prev_shca = shca;
 941                 if (!ib_fmr) {
 942                         ehca_gen_err("bad fmr=%p in list", ib_fmr);
 943                         ret = -EINVAL;
 944                         goto unmap_fmr_exit0;
 945                 }
 946                 shca = container_of(ib_fmr->device, struct ehca_shca,
 947                                     ib_device);
 948                 e_fmr = container_of(ib_fmr, struct ehca_mr, ib.ib_fmr);
 949                 if ((shca != prev_shca) && prev_shca) {
 950                         ehca_err(&shca->ib_device, "SHCA mismatch, shca=%p "
 951                                  "prev_shca=%p e_fmr=%p",
 952                                  shca, prev_shca, e_fmr);
 953                         ret = -EINVAL;
 954                         goto unmap_fmr_exit0;
 955                 }
 956                 if (!(e_fmr->flags & EHCA_MR_FLAG_FMR)) {
 957                         ehca_err(&shca->ib_device, "not a FMR, e_fmr=%p "
 958                                  "e_fmr->flags=%x", e_fmr, e_fmr->flags);
 959                         ret = -EINVAL;
 960                         goto unmap_fmr_exit0;
 961                 }
 962                 num_fmr++;
 963         }
 964
 965         /* loop over all FMRs to unmap */
 966         list_for_each_entry(ib_fmr, fmr_list, list) {
 967                 unmap_fmr_cnt++;
 968                 e_fmr = container_of(ib_fmr, struct ehca_mr, ib.ib_fmr);
 969                 shca = container_of(ib_fmr->device, struct ehca_shca,
 970                                     ib_device);
 971                 ret = ehca_unmap_one_fmr(shca, e_fmr);
 972                 if (ret) {
 973                         /* unmap failed, stop unmapping of rest of FMRs */
 974                         ehca_err(&shca->ib_device, "unmap of one FMR failed, "
 975                                  "stop rest, e_fmr=%p num_fmr=%x "
 976                                  "unmap_fmr_cnt=%x lkey=%x", e_fmr, num_fmr,
 977                                  unmap_fmr_cnt, e_fmr->ib.ib_fmr.lkey);
 978                         goto unmap_fmr_exit0;
 979                 }
 980         }
 981
 982 unmap_fmr_exit0:
 983         if (ret)
 984                 ehca_gen_err("ret=%x fmr_list=%p num_fmr=%x unmap_fmr_cnt=%x",
 985                              ret, fmr_list, num_fmr, unmap_fmr_cnt);
 986         return ret;
 987 } /* end ehca_unmap_fmr() */
 988
 989 /*----------------------------------------------------------------------*/
 990
 991 int ehca_dealloc_fmr(struct ib_fmr *fmr)
 992 {
 993         int ret;
 994         u64 h_ret;
 995         struct ehca_shca *shca =
 996                 container_of(fmr->device, struct ehca_shca, ib_device);
 997         struct ehca_mr *e_fmr = container_of(fmr, struct ehca_mr, ib.ib_fmr);
 998
 999         if (!(e_fmr->flags & EHCA_MR_FLAG_FMR)) {
1000                 ehca_err(fmr->device, "not a FMR, e_fmr=%p e_fmr->flags=%x",
1001                          e_fmr, e_fmr->flags);
1002                 ret = -EINVAL;
1003                 goto free_fmr_exit0;
1004         }
1005
1006         h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_fmr);
1007         if (h_ret != H_SUCCESS) {
1008                 ehca_err(fmr->device, "hipz_free_mr failed, h_ret=%lx e_fmr=%p "
1009                          "hca_hndl=%lx fmr_hndl=%lx fmr->lkey=%x",
1010                          h_ret, e_fmr, shca->ipz_hca_handle.handle,
1011                          e_fmr->ipz_mr_handle.handle, fmr->lkey);
1012                 ret = ehca2ib_return_code(h_ret);
1013                 goto free_fmr_exit0;
1014         }
1015         /* successful deregistration */
1016         ehca_mr_delete(e_fmr);
1017         return 0;
1018
1019 free_fmr_exit0:
1020         if (ret)
1021                 ehca_err(&shca->ib_device, "ret=%x fmr=%p", ret, fmr);
1022         return ret;
1023 } /* end ehca_dealloc_fmr() */
1024
1025 /*----------------------------------------------------------------------*/
1026
1027 int ehca_reg_mr(struct ehca_shca *shca,
1028                 struct ehca_mr *e_mr,
1029                 u64 *iova_start,
1030                 u64 size,
1031                 int acl,
1032                 struct ehca_pd *e_pd,
1033                 struct ehca_mr_pginfo *pginfo,
1034                 u32 *lkey, /*OUT*/
1035                 u32 *rkey) /*OUT*/
1036 {
1037         int ret;
1038         u64 h_ret;
1039         u32 hipz_acl;
1040         struct ehca_mr_hipzout_parms hipzout;
1041
1042         ehca_mrmw_map_acl(acl, &hipz_acl);
1043         ehca_mrmw_set_pgsize_hipz_acl(pginfo->hwpage_size, &hipz_acl);
1044         if (ehca_use_hp_mr == 1)
1045                 hipz_acl |= 0x00000001;
1046
1047         h_ret = hipz_h_alloc_resource_mr(shca->ipz_hca_handle, e_mr,
1048                                          (u64)iova_start, size, hipz_acl,
1049                                          e_pd->fw_pd, &hipzout);
1050         if (h_ret != H_SUCCESS) {
1051                 ehca_err(&shca->ib_device, "hipz_alloc_mr failed, h_ret=%lx "
1052                          "hca_hndl=%lx", h_ret, shca->ipz_hca_handle.handle);
1053                 ret = ehca2ib_return_code(h_ret);
1054                 goto ehca_reg_mr_exit0;
1055         }
1056
1057         e_mr->ipz_mr_handle = hipzout.handle;
1058
1059         ret = ehca_reg_mr_rpages(shca, e_mr, pginfo);
1060         if (ret)
1061                 goto ehca_reg_mr_exit1;
1062
1063         /* successful registration */
1064         e_mr->num_kpages = pginfo->num_kpages;
1065         e_mr->num_hwpages = pginfo->num_hwpages;
1066         e_mr->hwpage_size = pginfo->hwpage_size;
1067         e_mr->start = iova_start;
1068         e_mr->size = size;
1069         e_mr->acl = acl;
1070         *lkey = hipzout.lkey;
1071         *rkey = hipzout.rkey;
1072         return 0;
1073
1074 ehca_reg_mr_exit1:
1075         h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_mr);
1076         if (h_ret != H_SUCCESS) {
1077                 ehca_err(&shca->ib_device, "h_ret=%lx shca=%p e_mr=%p "
1078                          "iova_start=%p size=%lx acl=%x e_pd=%p lkey=%x "
1079                          "pginfo=%p num_kpages=%lx num_hwpages=%lx ret=%x",
1080                          h_ret, shca, e_mr, iova_start, size, acl, e_pd,
1081                          hipzout.lkey, pginfo, pginfo->num_kpages,
1082                          pginfo->num_hwpages, ret);
1083                 ehca_err(&shca->ib_device, "internal error in ehca_reg_mr, "
1084                          "not recoverable");
1085         }
1086 ehca_reg_mr_exit0:
1087         if (ret)
1088                 ehca_err(&shca->ib_device, "ret=%x shca=%p e_mr=%p "
1089                          "iova_start=%p size=%lx acl=%x e_pd=%p pginfo=%p "
1090                          "num_kpages=%lx num_hwpages=%lx",
1091                          ret, shca, e_mr, iova_start, size, acl, e_pd, pginfo,
1092                          pginfo->num_kpages, pginfo->num_hwpages);
1093         return ret;
1094 } /* end ehca_reg_mr() */
1095
1096 /*----------------------------------------------------------------------*/
1097
1098 int ehca_reg_mr_rpages(struct ehca_shca *shca,
1099                        struct ehca_mr *e_mr,
1100                        struct ehca_mr_pginfo *pginfo)
1101 {
1102         int ret = 0;
1103         u64 h_ret;
1104         u32 rnum;
1105         u64 rpage;
1106         u32 i;
1107         u64 *kpage;
1108
1109         if (!pginfo->num_hwpages) /* in case of fmr */
1110                 return 0;
1111
1112         kpage = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
1113         if (!kpage) {
1114                 ehca_err(&shca->ib_device, "kpage alloc failed");
1115                 ret = -ENOMEM;
1116                 goto ehca_reg_mr_rpages_exit0;
1117         }
1118
1119         /* max MAX_RPAGES ehca mr pages per register call */
1120         for (i = 0; i < NUM_CHUNKS(pginfo->num_hwpages, MAX_RPAGES); i++) {
1121
1122                 if (i == NUM_CHUNKS(pginfo->num_hwpages, MAX_RPAGES) - 1) {
1123                         rnum = pginfo->num_hwpages % MAX_RPAGES; /* last shot */
1124                         if (rnum == 0)
1125                                 rnum = MAX_RPAGES;      /* last shot is full */
1126                 } else
1127                         rnum = MAX_RPAGES;
1128
1129                 ret = ehca_set_pagebuf(pginfo, rnum, kpage);
1130                 if (ret) {
1131                         ehca_err(&shca->ib_device, "ehca_set_pagebuf "
1132                                  "bad rc, ret=%x rnum=%x kpage=%p",
1133                                  ret, rnum, kpage);
1134                         goto ehca_reg_mr_rpages_exit1;
1135                 }
1136
1137                 if (rnum > 1) {
1138                         rpage = virt_to_abs(kpage);
1139                         if (!rpage) {
1140                                 ehca_err(&shca->ib_device, "kpage=%p i=%x",
1141                                          kpage, i);
1142                                 ret = -EFAULT;
1143                                 goto ehca_reg_mr_rpages_exit1;
1144                         }
1145                 } else
1146                         rpage = *kpage;
1147
1148                 h_ret = hipz_h_register_rpage_mr(
1149                         shca->ipz_hca_handle, e_mr,
1150                         ehca_encode_hwpage_size(pginfo->hwpage_size),
1151                         0, rpage, rnum);
1152
1153                 if (i == NUM_CHUNKS(pginfo->num_hwpages, MAX_RPAGES) - 1) {
1154                         /*
1155                          * check for 'registration complete'==H_SUCCESS
1156                          * and for 'page registered'==H_PAGE_REGISTERED
1157                          */
1158                         if (h_ret != H_SUCCESS) {
1159                                 ehca_err(&shca->ib_device, "last "
1160                                          "hipz_reg_rpage_mr failed, h_ret=%lx "
1161                                          "e_mr=%p i=%x hca_hndl=%lx mr_hndl=%lx"
1162                                          " lkey=%x", h_ret, e_mr, i,
1163                                          shca->ipz_hca_handle.handle,
1164                                          e_mr->ipz_mr_handle.handle,
1165                                          e_mr->ib.ib_mr.lkey);
1166                                 ret = ehca2ib_return_code(h_ret);
1167                                 break;
1168                         } else
1169                                 ret = 0;
1170                 } else if (h_ret != H_PAGE_REGISTERED) {
1171                         ehca_err(&shca->ib_device, "hipz_reg_rpage_mr failed, "
1172                                  "h_ret=%lx e_mr=%p i=%x lkey=%x hca_hndl=%lx "
1173                                  "mr_hndl=%lx", h_ret, e_mr, i,
1174                                  e_mr->ib.ib_mr.lkey,
1175                                  shca->ipz_hca_handle.handle,
1176                                  e_mr->ipz_mr_handle.handle);
1177                         ret = ehca2ib_return_code(h_ret);
1178                         break;
1179                 } else
1180                         ret = 0;
1181         } /* end for(i) */
1182
1183
1184 ehca_reg_mr_rpages_exit1:
1185         ehca_free_fw_ctrlblock(kpage);
1186 ehca_reg_mr_rpages_exit0:
1187         if (ret)
1188                 ehca_err(&shca->ib_device, "ret=%x shca=%p e_mr=%p pginfo=%p "
1189                          "num_kpages=%lx num_hwpages=%lx", ret, shca, e_mr,
1190                          pginfo, pginfo->num_kpages, pginfo->num_hwpages);
1191         return ret;
1192 } /* end ehca_reg_mr_rpages() */
1193
1194 /*----------------------------------------------------------------------*/
1195
1196 inline int ehca_rereg_mr_rereg1(struct ehca_shca *shca,
1197                                 struct ehca_mr *e_mr,
1198                                 u64 *iova_start,
1199                                 u64 size,
1200                                 u32 acl,
1201                                 struct ehca_pd *e_pd,
1202                                 struct ehca_mr_pginfo *pginfo,
1203                                 u32 *lkey, /*OUT*/
1204                                 u32 *rkey) /*OUT*/
1205 {
1206         int ret;
1207         u64 h_ret;
1208         u32 hipz_acl;
1209         u64 *kpage;
1210         u64 rpage;
1211         struct ehca_mr_pginfo pginfo_save;
1212         struct ehca_mr_hipzout_parms hipzout;
1213
1214         ehca_mrmw_map_acl(acl, &hipz_acl);
1215         ehca_mrmw_set_pgsize_hipz_acl(pginfo->hwpage_size, &hipz_acl);
1216
1217         kpage = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
1218         if (!kpage) {
1219                 ehca_err(&shca->ib_device, "kpage alloc failed");
1220                 ret = -ENOMEM;
1221                 goto ehca_rereg_mr_rereg1_exit0;
1222         }
1223
1224         pginfo_save = *pginfo;
1225         ret = ehca_set_pagebuf(pginfo, pginfo->num_hwpages, kpage);
1226         if (ret) {
1227                 ehca_err(&shca->ib_device, "set pagebuf failed, e_mr=%p "
1228                          "pginfo=%p type=%x num_kpages=%lx num_hwpages=%lx "
1229                          "kpage=%p", e_mr, pginfo, pginfo->type,
1230                          pginfo->num_kpages, pginfo->num_hwpages, kpage);
1231                 goto ehca_rereg_mr_rereg1_exit1;
1232         }
1233         rpage = virt_to_abs(kpage);
1234         if (!rpage) {
1235                 ehca_err(&shca->ib_device, "kpage=%p", kpage);
1236                 ret = -EFAULT;
1237                 goto ehca_rereg_mr_rereg1_exit1;
1238         }
1239         h_ret = hipz_h_reregister_pmr(shca->ipz_hca_handle, e_mr,
1240                                       (u64)iova_start, size, hipz_acl,
1241                                       e_pd->fw_pd, rpage, &hipzout);
1242         if (h_ret != H_SUCCESS) {
1243                 /*
1244                  * reregistration unsuccessful, try it again with the 3 hCalls,
1245                  * e.g. this is required in case H_MR_CONDITION
1246                  * (MW bound or MR is shared)
1247                  */
1248                 ehca_warn(&shca->ib_device, "hipz_h_reregister_pmr failed "
1249                           "(Rereg1), h_ret=%lx e_mr=%p", h_ret, e_mr);
1250                 *pginfo = pginfo_save;
1251                 ret = -EAGAIN;
1252         } else if ((u64 *)hipzout.vaddr != iova_start) {
1253                 ehca_err(&shca->ib_device, "PHYP changed iova_start in "
1254                          "rereg_pmr, iova_start=%p iova_start_out=%lx e_mr=%p "
1255                          "mr_handle=%lx lkey=%x lkey_out=%x", iova_start,
1256                          hipzout.vaddr, e_mr, e_mr->ipz_mr_handle.handle,
1257                          e_mr->ib.ib_mr.lkey, hipzout.lkey);
1258                 ret = -EFAULT;
1259         } else {
1260                 /*
1261                  * successful reregistration
1262                  * note: start and start_out are identical for eServer HCAs
1263                  */
1264                 e_mr->num_kpages = pginfo->num_kpages;
1265                 e_mr->num_hwpages = pginfo->num_hwpages;
1266                 e_mr->hwpage_size = pginfo->hwpage_size;
1267                 e_mr->start = iova_start;
1268                 e_mr->size = size;
1269                 e_mr->acl = acl;
1270                 *lkey = hipzout.lkey;
1271                 *rkey = hipzout.rkey;
1272         }
1273
1274 ehca_rereg_mr_rereg1_exit1:
1275         ehca_free_fw_ctrlblock(kpage);
1276 ehca_rereg_mr_rereg1_exit0:
1277         if ( ret && (ret != -EAGAIN) )
1278                 ehca_err(&shca->ib_device, "ret=%x lkey=%x rkey=%x "
1279                          "pginfo=%p num_kpages=%lx num_hwpages=%lx",
1280                          ret, *lkey, *rkey, pginfo, pginfo->num_kpages,
1281                          pginfo->num_hwpages);
1282         return ret;
1283 } /* end ehca_rereg_mr_rereg1() */
1284
1285 /*----------------------------------------------------------------------*/
1286
1287 int ehca_rereg_mr(struct ehca_shca *shca,
1288                   struct ehca_mr *e_mr,
1289                   u64 *iova_start,
1290                   u64 size,
1291                   int acl,
1292                   struct ehca_pd *e_pd,
1293                   struct ehca_mr_pginfo *pginfo,
1294                   u32 *lkey,
1295                   u32 *rkey)
1296 {
1297         int ret = 0;
1298         u64 h_ret;
1299         int rereg_1_hcall = 1; /* 1: use hipz_h_reregister_pmr directly */
1300         int rereg_3_hcall = 0; /* 1: use 3 hipz calls for reregistration */
1301
1302         /* first determine reregistration hCall(s) */
1303         if ((pginfo->num_hwpages > MAX_RPAGES) ||
1304             (e_mr->num_hwpages > MAX_RPAGES) ||
1305             (pginfo->num_hwpages > e_mr->num_hwpages)) {
1306                 ehca_dbg(&shca->ib_device, "Rereg3 case, "
1307                          "pginfo->num_hwpages=%lx e_mr->num_hwpages=%x",
1308                          pginfo->num_hwpages, e_mr->num_hwpages);
1309                 rereg_1_hcall = 0;
1310                 rereg_3_hcall = 1;
1311         }
1312
1313         if (e_mr->flags & EHCA_MR_FLAG_MAXMR) { /* check for max-MR */
1314                 rereg_1_hcall = 0;
1315                 rereg_3_hcall = 1;
1316                 e_mr->flags &= ~EHCA_MR_FLAG_MAXMR;
1317                 ehca_err(&shca->ib_device, "Rereg MR for max-MR! e_mr=%p",
1318                          e_mr);
1319         }
1320
1321         if (rereg_1_hcall) {
1322                 ret = ehca_rereg_mr_rereg1(shca, e_mr, iova_start, size,
1323                                            acl, e_pd, pginfo, lkey, rkey);
1324                 if (ret) {
1325                         if (ret == -EAGAIN)
1326                                 rereg_3_hcall = 1;
1327                         else
1328                                 goto ehca_rereg_mr_exit0;
1329                 }
1330         }
1331
1332         if (rereg_3_hcall) {
1333                 struct ehca_mr save_mr;
1334
1335                 /* first deregister old MR */
1336                 h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_mr);
1337                 if (h_ret != H_SUCCESS) {
1338                         ehca_err(&shca->ib_device, "hipz_free_mr failed, "
1339                                  "h_ret=%lx e_mr=%p hca_hndl=%lx mr_hndl=%lx "
1340                                  "mr->lkey=%x",
1341                                  h_ret, e_mr, shca->ipz_hca_handle.handle,
1342                                  e_mr->ipz_mr_handle.handle,
1343                                  e_mr->ib.ib_mr.lkey);
1344                         ret = ehca2ib_return_code(h_ret);
1345                         goto ehca_rereg_mr_exit0;
1346                 }
1347                 /* clean ehca_mr_t, without changing struct ib_mr and lock */
1348                 save_mr = *e_mr;
1349                 ehca_mr_deletenew(e_mr);
1350
1351                 /* set some MR values */
1352                 e_mr->flags = save_mr.flags;
1353                 e_mr->hwpage_size = save_mr.hwpage_size;
1354                 e_mr->fmr_page_size = save_mr.fmr_page_size;
1355                 e_mr->fmr_max_pages = save_mr.fmr_max_pages;
1356                 e_mr->fmr_max_maps = save_mr.fmr_max_maps;
1357                 e_mr->fmr_map_cnt = save_mr.fmr_map_cnt;
1358
1359                 ret = ehca_reg_mr(shca, e_mr, iova_start, size, acl,
1360                                   e_pd, pginfo, lkey, rkey);
1361                 if (ret) {
1362                         u32 offset = (u64)(&e_mr->flags) - (u64)e_mr;
1363                         memcpy(&e_mr->flags, &(save_mr.flags),
1364                                sizeof(struct ehca_mr) - offset);
1365                         goto ehca_rereg_mr_exit0;
1366                 }
1367         }
1368
1369 ehca_rereg_mr_exit0:
1370         if (ret)
1371                 ehca_err(&shca->ib_device, "ret=%x shca=%p e_mr=%p "
1372                          "iova_start=%p size=%lx acl=%x e_pd=%p pginfo=%p "
1373                          "num_kpages=%lx lkey=%x rkey=%x rereg_1_hcall=%x "
1374                          "rereg_3_hcall=%x", ret, shca, e_mr, iova_start, size,
1375                          acl, e_pd, pginfo, pginfo->num_kpages, *lkey, *rkey,
1376                          rereg_1_hcall, rereg_3_hcall);
1377         return ret;
1378 } /* end ehca_rereg_mr() */
1379
1380 /*----------------------------------------------------------------------*/
1381
1382 int ehca_unmap_one_fmr(struct ehca_shca *shca,
1383                        struct ehca_mr *e_fmr)
1384 {
1385         int ret = 0;
1386         u64 h_ret;
1387         struct ehca_pd *e_pd =
1388                 container_of(e_fmr->ib.ib_fmr.pd, struct ehca_pd, ib_pd);
1389         struct ehca_mr save_fmr;
1390         u32 tmp_lkey, tmp_rkey;
1391         struct ehca_mr_pginfo pginfo;
1392         struct ehca_mr_hipzout_parms hipzout;
1393         struct ehca_mr save_mr;
1394
1395         if (e_fmr->fmr_max_pages <= MAX_RPAGES) {
1396                 /*
1397                  * note: after using rereg hcall with len=0,
1398                  * rereg hcall must be used again for registering pages
1399                  */
1400                 h_ret = hipz_h_reregister_pmr(shca->ipz_hca_handle, e_fmr, 0,
1401                                               0, 0, e_pd->fw_pd, 0, &hipzout);
1402                 if (h_ret == H_SUCCESS) {
1403                         /* successful reregistration */
1404                         e_fmr->start = NULL;
1405                         e_fmr->size = 0;
1406                         tmp_lkey = hipzout.lkey;
1407                         tmp_rkey = hipzout.rkey;
1408                         return 0;
1409                 }
1410                 /*
1411                  * should not happen, because length checked above,
1412                  * FMRs are not shared and no MW bound to FMRs
1413                  */
1414                 ehca_err(&shca->ib_device, "hipz_reregister_pmr failed "
1415                          "(Rereg1), h_ret=%lx e_fmr=%p hca_hndl=%lx "
1416                          "mr_hndl=%lx lkey=%x lkey_out=%x",
1417                          h_ret, e_fmr, shca->ipz_hca_handle.handle,
1418                          e_fmr->ipz_mr_handle.handle,
1419                          e_fmr->ib.ib_fmr.lkey, hipzout.lkey);
1420                 /* try free and rereg */
1421         }
1422
1423         /* first free old FMR */
1424         h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_fmr);
1425         if (h_ret != H_SUCCESS) {
1426                 ehca_err(&shca->ib_device, "hipz_free_mr failed, "
1427                          "h_ret=%lx e_fmr=%p hca_hndl=%lx mr_hndl=%lx "
1428                          "lkey=%x",
1429                          h_ret, e_fmr, shca->ipz_hca_handle.handle,
1430                          e_fmr->ipz_mr_handle.handle,
1431                          e_fmr->ib.ib_fmr.lkey);
1432                 ret = ehca2ib_return_code(h_ret);
1433                 goto ehca_unmap_one_fmr_exit0;
1434         }
1435         /* clean ehca_mr_t, without changing lock */
1436         save_fmr = *e_fmr;
1437         ehca_mr_deletenew(e_fmr);
1438
1439         /* set some MR values */
1440         e_fmr->flags = save_fmr.flags;
1441         e_fmr->hwpage_size = save_fmr.hwpage_size;
1442         e_fmr->fmr_page_size = save_fmr.fmr_page_size;
1443         e_fmr->fmr_max_pages = save_fmr.fmr_max_pages;
1444         e_fmr->fmr_max_maps = save_fmr.fmr_max_maps;
1445         e_fmr->fmr_map_cnt = save_fmr.fmr_map_cnt;
1446         e_fmr->acl = save_fmr.acl;
1447
1448         memset(&pginfo, 0, sizeof(pginfo));
1449         pginfo.type = EHCA_MR_PGI_FMR;
1450         ret = ehca_reg_mr(shca, e_fmr, NULL,
1451                           (e_fmr->fmr_max_pages * e_fmr->fmr_page_size),
1452                           e_fmr->acl, e_pd, &pginfo, &tmp_lkey,
1453                           &tmp_rkey);
1454         if (ret) {
1455                 u32 offset = (u64)(&e_fmr->flags) - (u64)e_fmr;
1456                 memcpy(&e_fmr->flags, &(save_mr.flags),
1457                        sizeof(struct ehca_mr) - offset);
1458         }
1459
1460 ehca_unmap_one_fmr_exit0:
1461         if (ret)
1462                 ehca_err(&shca->ib_device, "ret=%x tmp_lkey=%x tmp_rkey=%x "
1463                          "fmr_max_pages=%x",
1464                          ret, tmp_lkey, tmp_rkey, e_fmr->fmr_max_pages);
1465         return ret;
1466 } /* end ehca_unmap_one_fmr() */
1467
1468 /*----------------------------------------------------------------------*/
1469
1470 int ehca_reg_smr(struct ehca_shca *shca,
1471                  struct ehca_mr *e_origmr,
1472                  struct ehca_mr *e_newmr,
1473                  u64 *iova_start,
1474                  int acl,
1475                  struct ehca_pd *e_pd,
1476                  u32 *lkey, /*OUT*/
1477                  u32 *rkey) /*OUT*/
1478 {
1479         int ret = 0;
1480         u64 h_ret;
1481         u32 hipz_acl;
1482         struct ehca_mr_hipzout_parms hipzout;
1483
1484         ehca_mrmw_map_acl(acl, &hipz_acl);
1485         ehca_mrmw_set_pgsize_hipz_acl(e_origmr->hwpage_size, &hipz_acl);
1486
1487         h_ret = hipz_h_register_smr(shca->ipz_hca_handle, e_newmr, e_origmr,
1488                                     (u64)iova_start, hipz_acl, e_pd->fw_pd,
1489                                     &hipzout);
1490         if (h_ret != H_SUCCESS) {
1491                 ehca_err(&shca->ib_device, "hipz_reg_smr failed, h_ret=%lx "
1492                          "shca=%p e_origmr=%p e_newmr=%p iova_start=%p acl=%x "
1493                          "e_pd=%p hca_hndl=%lx mr_hndl=%lx lkey=%x",
1494                          h_ret, shca, e_origmr, e_newmr, iova_start, acl, e_pd,
1495                          shca->ipz_hca_handle.handle,
1496                          e_origmr->ipz_mr_handle.handle,
1497                          e_origmr->ib.ib_mr.lkey);
1498                 ret = ehca2ib_return_code(h_ret);
1499                 goto ehca_reg_smr_exit0;
1500         }
1501         /* successful registration */
1502         e_newmr->num_kpages = e_origmr->num_kpages;
1503         e_newmr->num_hwpages = e_origmr->num_hwpages;
1504         e_newmr->hwpage_size   = e_origmr->hwpage_size;
1505         e_newmr->start = iova_start;
1506         e_newmr->size = e_origmr->size;
1507         e_newmr->acl = acl;
1508         e_newmr->ipz_mr_handle = hipzout.handle;
1509         *lkey = hipzout.lkey;
1510         *rkey = hipzout.rkey;
1511         return 0;
1512
1513 ehca_reg_smr_exit0:
1514         if (ret)
1515                 ehca_err(&shca->ib_device, "ret=%x shca=%p e_origmr=%p "
1516                          "e_newmr=%p iova_start=%p acl=%x e_pd=%p",
1517                          ret, shca, e_origmr, e_newmr, iova_start, acl, e_pd);
1518         return ret;
1519 } /* end ehca_reg_smr() */
1520
1521 /*----------------------------------------------------------------------*/
1522
1523 /* register internal max-MR to internal SHCA */
1524 int ehca_reg_internal_maxmr(
1525         struct ehca_shca *shca,
1526         struct ehca_pd *e_pd,
1527         struct ehca_mr **e_maxmr)  /*OUT*/
1528 {
1529         int ret;
1530         struct ehca_mr *e_mr;
1531         u64 *iova_start;
1532         u64 size_maxmr;
1533         struct ehca_mr_pginfo pginfo;
1534         struct ib_phys_buf ib_pbuf;
1535         u32 num_kpages;
1536         u32 num_hwpages;
1537         u64 hw_pgsize;
1538
1539         e_mr = ehca_mr_new();
1540         if (!e_mr) {
1541                 ehca_err(&shca->ib_device, "out of memory");
1542                 ret = -ENOMEM;
1543                 goto ehca_reg_internal_maxmr_exit0;
1544         }
1545         e_mr->flags |= EHCA_MR_FLAG_MAXMR;
1546
1547         /* register internal max-MR on HCA */
1548         size_maxmr = (u64)high_memory - PAGE_OFFSET;
1549         iova_start = (u64 *)KERNELBASE;
1550         ib_pbuf.addr = 0;
1551         ib_pbuf.size = size_maxmr;
1552         num_kpages = NUM_CHUNKS(((u64)iova_start % PAGE_SIZE) + size_maxmr,
1553                                 PAGE_SIZE);
1554         hw_pgsize = ehca_get_max_hwpage_size(shca);
1555         num_hwpages = NUM_CHUNKS(((u64)iova_start % hw_pgsize) + size_maxmr,
1556                                  hw_pgsize);
1557
1558         memset(&pginfo, 0, sizeof(pginfo));
1559         pginfo.type = EHCA_MR_PGI_PHYS;
1560         pginfo.num_kpages = num_kpages;
1561         pginfo.num_hwpages = num_hwpages;
1562         pginfo.hwpage_size = hw_pgsize;
1563         pginfo.u.phy.num_phys_buf = 1;
1564         pginfo.u.phy.phys_buf_array = &ib_pbuf;
1565
1566         ret = ehca_reg_mr(shca, e_mr, iova_start, size_maxmr, 0, e_pd,
1567                           &pginfo, &e_mr->ib.ib_mr.lkey,
1568                           &e_mr->ib.ib_mr.rkey);
1569         if (ret) {
1570                 ehca_err(&shca->ib_device, "reg of internal max MR failed, "
1571                          "e_mr=%p iova_start=%p size_maxmr=%lx num_kpages=%x "
1572                          "num_hwpages=%x", e_mr, iova_start, size_maxmr,
1573                          num_kpages, num_hwpages);
1574                 goto ehca_reg_internal_maxmr_exit1;
1575         }
1576
1577         /* successful registration of all pages */
1578         e_mr->ib.ib_mr.device = e_pd->ib_pd.device;
1579         e_mr->ib.ib_mr.pd = &e_pd->ib_pd;
1580         e_mr->ib.ib_mr.uobject = NULL;
1581         atomic_inc(&(e_pd->ib_pd.usecnt));
1582         atomic_set(&(e_mr->ib.ib_mr.usecnt), 0);
1583         *e_maxmr = e_mr;
1584         return 0;
1585
1586 ehca_reg_internal_maxmr_exit1:
1587         ehca_mr_delete(e_mr);
1588 ehca_reg_internal_maxmr_exit0:
1589         if (ret)
1590                 ehca_err(&shca->ib_device, "ret=%x shca=%p e_pd=%p e_maxmr=%p",
1591                          ret, shca, e_pd, e_maxmr);
1592         return ret;
1593 } /* end ehca_reg_internal_maxmr() */
1594
1595 /*----------------------------------------------------------------------*/
1596
1597 int ehca_reg_maxmr(struct ehca_shca *shca,
1598                    struct ehca_mr *e_newmr,
1599                    u64 *iova_start,
1600                    int acl,
1601                    struct ehca_pd *e_pd,
1602                    u32 *lkey,
1603                    u32 *rkey)
1604 {
1605         u64 h_ret;
1606         struct ehca_mr *e_origmr = shca->maxmr;
1607         u32 hipz_acl;
1608         struct ehca_mr_hipzout_parms hipzout;
1609
1610         ehca_mrmw_map_acl(acl, &hipz_acl);
1611         ehca_mrmw_set_pgsize_hipz_acl(e_origmr->hwpage_size, &hipz_acl);
1612
1613         h_ret = hipz_h_register_smr(shca->ipz_hca_handle, e_newmr, e_origmr,
1614                                     (u64)iova_start, hipz_acl, e_pd->fw_pd,
1615                                     &hipzout);
1616         if (h_ret != H_SUCCESS) {
1617                 ehca_err(&shca->ib_device, "hipz_reg_smr failed, h_ret=%lx "
1618                          "e_origmr=%p hca_hndl=%lx mr_hndl=%lx lkey=%x",
1619                          h_ret, e_origmr, shca->ipz_hca_handle.handle,
1620                          e_origmr->ipz_mr_handle.handle,
1621                          e_origmr->ib.ib_mr.lkey);
1622                 return ehca2ib_return_code(h_ret);
1623         }
1624         /* successful registration */
1625         e_newmr->num_kpages = e_origmr->num_kpages;
1626         e_newmr->num_hwpages = e_origmr->num_hwpages;
1627         e_newmr->hwpage_size = e_origmr->hwpage_size;
1628         e_newmr->start = iova_start;
1629         e_newmr->size = e_origmr->size;
1630         e_newmr->acl = acl;
1631         e_newmr->ipz_mr_handle = hipzout.handle;
1632         *lkey = hipzout.lkey;
1633         *rkey = hipzout.rkey;
1634         return 0;
1635 } /* end ehca_reg_maxmr() */
1636
1637 /*----------------------------------------------------------------------*/
1638
1639 int ehca_dereg_internal_maxmr(struct ehca_shca *shca)
1640 {
1641         int ret;
1642         struct ehca_mr *e_maxmr;
1643         struct ib_pd *ib_pd;
1644
1645         if (!shca->maxmr) {
1646                 ehca_err(&shca->ib_device, "bad call, shca=%p", shca);
1647                 ret = -EINVAL;
1648                 goto ehca_dereg_internal_maxmr_exit0;
1649         }
1650
1651         e_maxmr = shca->maxmr;
1652         ib_pd = e_maxmr->ib.ib_mr.pd;
1653         shca->maxmr = NULL; /* remove internal max-MR indication from SHCA */
1654
1655         ret = ehca_dereg_mr(&e_maxmr->ib.ib_mr);
1656         if (ret) {
1657                 ehca_err(&shca->ib_device, "dereg internal max-MR failed, "
1658                          "ret=%x e_maxmr=%p shca=%p lkey=%x",
1659                          ret, e_maxmr, shca, e_maxmr->ib.ib_mr.lkey);
1660                 shca->maxmr = e_maxmr;
1661                 goto ehca_dereg_internal_maxmr_exit0;
1662         }
1663
1664         atomic_dec(&ib_pd->usecnt);
1665
1666 ehca_dereg_internal_maxmr_exit0:
1667         if (ret)
1668                 ehca_err(&shca->ib_device, "ret=%x shca=%p shca->maxmr=%p",
1669                          ret, shca, shca->maxmr);
1670         return ret;
1671 } /* end ehca_dereg_internal_maxmr() */
1672
1673 /*----------------------------------------------------------------------*/
1674
1675 /*
1676  * check physical buffer array of MR verbs for validness and
1677  * calculates MR size
1678  */
1679 int ehca_mr_chk_buf_and_calc_size(struct ib_phys_buf *phys_buf_array,
1680                                   int num_phys_buf,
1681                                   u64 *iova_start,
1682                                   u64 *size)
1683 {
1684         struct ib_phys_buf *pbuf = phys_buf_array;
1685         u64 size_count = 0;
1686         u32 i;
1687
1688         if (num_phys_buf == 0) {
1689                 ehca_gen_err("bad phys buf array len, num_phys_buf=0");
1690                 return -EINVAL;
1691         }
1692         /* check first buffer */
1693         if (((u64)iova_start & ~PAGE_MASK) != (pbuf->addr & ~PAGE_MASK)) {
1694                 ehca_gen_err("iova_start/addr mismatch, iova_start=%p "
1695                              "pbuf->addr=%lx pbuf->size=%lx",
1696                              iova_start, pbuf->addr, pbuf->size);
1697                 return -EINVAL;
1698         }
1699         if (((pbuf->addr + pbuf->size) % PAGE_SIZE) &&
1700             (num_phys_buf > 1)) {
1701                 ehca_gen_err("addr/size mismatch in 1st buf, pbuf->addr=%lx "
1702                              "pbuf->size=%lx", pbuf->addr, pbuf->size);
1703                 return -EINVAL;
1704         }
1705
1706         for (i = 0; i < num_phys_buf; i++) {
1707                 if ((i > 0) && (pbuf->addr % PAGE_SIZE)) {
1708                         ehca_gen_err("bad address, i=%x pbuf->addr=%lx "
1709                                      "pbuf->size=%lx",
1710                                      i, pbuf->addr, pbuf->size);
1711                         return -EINVAL;
1712                 }
1713                 if (((i > 0) && /* not 1st */
1714                      (i < (num_phys_buf - 1)) &&        /* not last */
1715                      (pbuf->size % PAGE_SIZE)) || (pbuf->size == 0)) {
1716                         ehca_gen_err("bad size, i=%x pbuf->size=%lx",
1717                                      i, pbuf->size);
1718                         return -EINVAL;
1719                 }
1720                 size_count += pbuf->size;
1721                 pbuf++;
1722         }
1723
1724         *size = size_count;
1725         return 0;
1726 } /* end ehca_mr_chk_buf_and_calc_size() */
1727
1728 /*----------------------------------------------------------------------*/
1729
1730 /* check page list of map FMR verb for validness */
1731 int ehca_fmr_check_page_list(struct ehca_mr *e_fmr,
1732                              u64 *page_list,
1733                              int list_len)
1734 {
1735         u32 i;
1736         u64 *page;
1737
1738         if ((list_len == 0) || (list_len > e_fmr->fmr_max_pages)) {
1739                 ehca_gen_err("bad list_len, list_len=%x "
1740                              "e_fmr->fmr_max_pages=%x fmr=%p",
1741                              list_len, e_fmr->fmr_max_pages, e_fmr);
1742                 return -EINVAL;
1743         }
1744
1745         /* each page must be aligned */
1746         page = page_list;
1747         for (i = 0; i < list_len; i++) {
1748                 if (*page % e_fmr->fmr_page_size) {
1749                         ehca_gen_err("bad page, i=%x *page=%lx page=%p fmr=%p "
1750                                      "fmr_page_size=%x", i, *page, page, e_fmr,
1751                                      e_fmr->fmr_page_size);
1752                         return -EINVAL;
1753                 }
1754                 page++;
1755         }
1756
1757         return 0;
1758 } /* end ehca_fmr_check_page_list() */
1759
1760 /*----------------------------------------------------------------------*/
1761
1762 /* PAGE_SIZE >= pginfo->hwpage_size */
1763 static int ehca_set_pagebuf_user1(struct ehca_mr_pginfo *pginfo,
1764                                   u32 number,
1765                                   u64 *kpage)
1766 {
1767         int ret = 0;
1768         struct ib_umem_chunk *prev_chunk;
1769         struct ib_umem_chunk *chunk;
1770         u64 pgaddr;
1771         u32 i = 0;
1772         u32 j = 0;
1773         int hwpages_per_kpage = PAGE_SIZE / pginfo->hwpage_size;
1774
1775         /* loop over desired chunk entries */
1776         chunk      = pginfo->u.usr.next_chunk;
1777         prev_chunk = pginfo->u.usr.next_chunk;
1778         list_for_each_entry_continue(
1779                 chunk, (&(pginfo->u.usr.region->chunk_list)), list) {
1780                 for (i = pginfo->u.usr.next_nmap; i < chunk->nmap; ) {
1781                         pgaddr = page_to_pfn(chunk->page_list[i].page)
1782                                 << PAGE_SHIFT ;
1783                         *kpage = phys_to_abs(pgaddr +
1784                                              (pginfo->next_hwpage *
1785                                               pginfo->hwpage_size));
1786                         if ( !(*kpage) ) {
1787                                 ehca_gen_err("pgaddr=%lx "
1788                                              "chunk->page_list[i]=%lx "
1789                                              "i=%x next_hwpage=%lx",
1790                                              pgaddr, (u64)sg_dma_address(
1791                                                      &chunk->page_list[i]),
1792                                              i, pginfo->next_hwpage);
1793                                 return -EFAULT;
1794                         }
1795                         (pginfo->hwpage_cnt)++;
1796                         (pginfo->next_hwpage)++;
1797                         kpage++;
1798                         if (pginfo->next_hwpage % hwpages_per_kpage == 0) {
1799                                 (pginfo->kpage_cnt)++;
1800                                 (pginfo->u.usr.next_nmap)++;
1801                                 pginfo->next_hwpage = 0;
1802                                 i++;
1803                         }
1804                         j++;
1805                         if (j >= number) break;
1806                 }
1807                 if ((pginfo->u.usr.next_nmap >= chunk->nmap) &&
1808                     (j >= number)) {
1809                         pginfo->u.usr.next_nmap = 0;
1810                         prev_chunk = chunk;
1811                         break;
1812                 } else if (pginfo->u.usr.next_nmap >= chunk->nmap) {
1813                         pginfo->u.usr.next_nmap = 0;
1814                         prev_chunk = chunk;
1815                 } else if (j >= number)
1816                         break;
1817                 else
1818                         prev_chunk = chunk;
1819         }
1820         pginfo->u.usr.next_chunk =
1821                 list_prepare_entry(prev_chunk,
1822                                    (&(pginfo->u.usr.region->chunk_list)),
1823                                    list);
1824         return ret;
1825 }
1826
1827 /*
1828  * check given pages for contiguous layout
1829  * last page addr is returned in prev_pgaddr for further check
1830  */
1831 static int ehca_check_kpages_per_ate(struct scatterlist *page_list,
1832                                      int start_idx, int end_idx,
1833                                      u64 *prev_pgaddr)
1834 {
1835         int t;
1836         for (t = start_idx; t <= end_idx; t++) {
1837                 u64 pgaddr = page_to_pfn(page_list[t].page) << PAGE_SHIFT;
1838                 ehca_gen_dbg("chunk_page=%lx value=%016lx", pgaddr,
1839                              *(u64 *)abs_to_virt(phys_to_abs(pgaddr)));
1840                 if (pgaddr - PAGE_SIZE != *prev_pgaddr) {
1841                         ehca_gen_err("uncontiguous page found pgaddr=%lx "
1842                                      "prev_pgaddr=%lx page_list_i=%x",
1843                                      pgaddr, *prev_pgaddr, t);
1844                         return -EINVAL;
1845                 }
1846                 *prev_pgaddr = pgaddr;
1847         }
1848         return 0;
1849 }
1850
1851 /* PAGE_SIZE < pginfo->hwpage_size */
1852 static int ehca_set_pagebuf_user2(struct ehca_mr_pginfo *pginfo,
1853                                   u32 number,
1854                                   u64 *kpage)
1855 {
1856         int ret = 0;
1857         struct ib_umem_chunk *prev_chunk;
1858         struct ib_umem_chunk *chunk;
1859         u64 pgaddr, prev_pgaddr;
1860         u32 i = 0;
1861         u32 j = 0;
1862         int kpages_per_hwpage = pginfo->hwpage_size / PAGE_SIZE;
1863         int nr_kpages = kpages_per_hwpage;
1864
1865         /* loop over desired chunk entries */
1866         chunk      = pginfo->u.usr.next_chunk;
1867         prev_chunk = pginfo->u.usr.next_chunk;
1868         list_for_each_entry_continue(
1869                 chunk, (&(pginfo->u.usr.region->chunk_list)), list) {
1870                 for (i = pginfo->u.usr.next_nmap; i < chunk->nmap; ) {
1871                         if (nr_kpages == kpages_per_hwpage) {
1872                                 pgaddr = ( page_to_pfn(chunk->page_list[i].page)
1873                                            << PAGE_SHIFT );
1874                                 *kpage = phys_to_abs(pgaddr);
1875                                 if ( !(*kpage) ) {
1876                                         ehca_gen_err("pgaddr=%lx i=%x",
1877                                                      pgaddr, i);
1878                                         ret = -EFAULT;
1879                                         return ret;
1880                                 }
1881                                 /*
1882                                  * The first page in a hwpage must be aligned;
1883                                  * the first MR page is exempt from this rule.
1884                                  */
1885                                 if (pgaddr & (pginfo->hwpage_size - 1)) {
1886                                         if (pginfo->hwpage_cnt) {
1887                                                 ehca_gen_err(
1888                                                         "invalid alignment "
1889                                                         "pgaddr=%lx i=%x "
1890                                                         "mr_pgsize=%lx",
1891                                                         pgaddr, i,
1892                                                         pginfo->hwpage_size);
1893                                                 ret = -EFAULT;
1894                                                 return ret;
1895                                         }
1896                                         /* first MR page */
1897                                         pginfo->kpage_cnt =
1898                                                 (pgaddr &
1899                                                  (pginfo->hwpage_size - 1)) >>
1900                                                 PAGE_SHIFT;
1901                                         nr_kpages -= pginfo->kpage_cnt;
1902                                         *kpage = phys_to_abs(
1903                                                 pgaddr &
1904                                                 ~(pginfo->hwpage_size - 1));
1905                                 }
1906                                 ehca_gen_dbg("kpage=%lx chunk_page=%lx "
1907                                              "value=%016lx", *kpage, pgaddr,
1908                                              *(u64 *)abs_to_virt(
1909                                                      phys_to_abs(pgaddr)));
1910                                 prev_pgaddr = pgaddr;
1911                                 i++;
1912                                 pginfo->kpage_cnt++;
1913                                 pginfo->u.usr.next_nmap++;
1914                                 nr_kpages--;
1915                                 if (!nr_kpages)
1916                                         goto next_kpage;
1917                                 continue;
1918                         }
1919                         if (i + nr_kpages > chunk->nmap) {
1920                                 ret = ehca_check_kpages_per_ate(
1921                                         chunk->page_list, i,
1922                                         chunk->nmap - 1, &prev_pgaddr);
1923                                 if (ret) return ret;
1924                                 pginfo->kpage_cnt += chunk->nmap - i;
1925                                 pginfo->u.usr.next_nmap += chunk->nmap - i;
1926                                 nr_kpages -= chunk->nmap - i;
1927                                 break;
1928                         }
1929
1930                         ret = ehca_check_kpages_per_ate(chunk->page_list, i,
1931                                                         i + nr_kpages - 1,
1932                                                         &prev_pgaddr);
1933                         if (ret) return ret;
1934                         i += nr_kpages;
1935                         pginfo->kpage_cnt += nr_kpages;
1936                         pginfo->u.usr.next_nmap += nr_kpages;
1937 next_kpage:
1938                         nr_kpages = kpages_per_hwpage;
1939                         (pginfo->hwpage_cnt)++;
1940                         kpage++;
1941                         j++;
1942                         if (j >= number) break;
1943                 }
1944                 if ((pginfo->u.usr.next_nmap >= chunk->nmap) &&
1945                     (j >= number)) {
1946                         pginfo->u.usr.next_nmap = 0;
1947                         prev_chunk = chunk;
1948                         break;
1949                 } else if (pginfo->u.usr.next_nmap >= chunk->nmap) {
1950                         pginfo->u.usr.next_nmap = 0;
1951                         prev_chunk = chunk;
1952                 } else if (j >= number)
1953                         break;
1954                 else
1955                         prev_chunk = chunk;
1956         }
1957         pginfo->u.usr.next_chunk =
1958                 list_prepare_entry(prev_chunk,
1959                                    (&(pginfo->u.usr.region->chunk_list)),
1960                                    list);
1961         return ret;
1962 }
1963
1964 int ehca_set_pagebuf_phys(struct ehca_mr_pginfo *pginfo,
1965                           u32 number,
1966                           u64 *kpage)
1967 {
1968         int ret = 0;
1969         struct ib_phys_buf *pbuf;
1970         u64 num_hw, offs_hw;
1971         u32 i = 0;
1972
1973         /* loop over desired phys_buf_array entries */
1974         while (i < number) {
1975                 pbuf   = pginfo->u.phy.phys_buf_array + pginfo->u.phy.next_buf;
1976                 num_hw  = NUM_CHUNKS((pbuf->addr % pginfo->hwpage_size) +
1977                                      pbuf->size, pginfo->hwpage_size);
1978                 offs_hw = (pbuf->addr & ~(pginfo->hwpage_size - 1)) /
1979                         pginfo->hwpage_size;
1980                 while (pginfo->next_hwpage < offs_hw + num_hw) {
1981                         /* sanity check */
1982                         if ((pginfo->kpage_cnt >= pginfo->num_kpages) ||
1983                             (pginfo->hwpage_cnt >= pginfo->num_hwpages)) {
1984                                 ehca_gen_err("kpage_cnt >= num_kpages, "
1985                                              "kpage_cnt=%lx num_kpages=%lx "
1986                                              "hwpage_cnt=%lx "
1987                                              "num_hwpages=%lx i=%x",
1988                                              pginfo->kpage_cnt,
1989                                              pginfo->num_kpages,
1990                                              pginfo->hwpage_cnt,
1991                                              pginfo->num_hwpages, i);
1992                                 return -EFAULT;
1993                         }
1994                         *kpage = phys_to_abs(
1995                                 (pbuf->addr & ~(pginfo->hwpage_size - 1)) +
1996                                 (pginfo->next_hwpage * pginfo->hwpage_size));
1997                         if ( !(*kpage) && pbuf->addr ) {
1998                                 ehca_gen_err("pbuf->addr=%lx pbuf->size=%lx "
1999                                              "next_hwpage=%lx", pbuf->addr,
2000                                              pbuf->size, pginfo->next_hwpage);
2001                                 return -EFAULT;
2002                         }
2003                         (pginfo->hwpage_cnt)++;
2004                         (pginfo->next_hwpage)++;
2005                         if (PAGE_SIZE >= pginfo->hwpage_size) {
2006                                 if (pginfo->next_hwpage %
2007                                     (PAGE_SIZE / pginfo->hwpage_size) == 0)
2008                                         (pginfo->kpage_cnt)++;
2009                         } else
2010                                 pginfo->kpage_cnt += pginfo->hwpage_size /
2011                                         PAGE_SIZE;
2012                         kpage++;
2013                         i++;
2014                         if (i >= number) break;
2015                 }
2016                 if (pginfo->next_hwpage >= offs_hw + num_hw) {
2017                         (pginfo->u.phy.next_buf)++;
2018                         pginfo->next_hwpage = 0;
2019                 }
2020         }
2021         return ret;
2022 }
2023
2024 int ehca_set_pagebuf_fmr(struct ehca_mr_pginfo *pginfo,
2025                          u32 number,
2026                          u64 *kpage)
2027 {
2028         int ret = 0;
2029         u64 *fmrlist;
2030         u32 i;
2031
2032         /* loop over desired page_list entries */
2033         fmrlist = pginfo->u.fmr.page_list + pginfo->u.fmr.next_listelem;
2034         for (i = 0; i < number; i++) {
2035                 *kpage = phys_to_abs((*fmrlist & ~(pginfo->hwpage_size - 1)) +
2036                                      pginfo->next_hwpage * pginfo->hwpage_size);
2037                 if ( !(*kpage) ) {
2038                         ehca_gen_err("*fmrlist=%lx fmrlist=%p "
2039                                      "next_listelem=%lx next_hwpage=%lx",
2040                                      *fmrlist, fmrlist,
2041                                      pginfo->u.fmr.next_listelem,
2042                                      pginfo->next_hwpage);
2043                         return -EFAULT;
2044                 }
2045                 (pginfo->hwpage_cnt)++;
2046                 if (pginfo->u.fmr.fmr_pgsize >= pginfo->hwpage_size) {
2047                         if (pginfo->next_hwpage %
2048                             (pginfo->u.fmr.fmr_pgsize /
2049                              pginfo->hwpage_size) == 0) {
2050                                 (pginfo->kpage_cnt)++;
2051                                 (pginfo->u.fmr.next_listelem)++;
2052                                 fmrlist++;
2053                                 pginfo->next_hwpage = 0;
2054                         } else
2055                                 (pginfo->next_hwpage)++;
2056                 } else {
2057                         unsigned int cnt_per_hwpage = pginfo->hwpage_size /
2058                                 pginfo->u.fmr.fmr_pgsize;
2059                         unsigned int j;
2060                         u64 prev = *kpage;
2061                         /* check if adrs are contiguous */
2062                         for (j = 1; j < cnt_per_hwpage; j++) {
2063                                 u64 p = phys_to_abs(fmrlist[j] &
2064                                                     ~(pginfo->hwpage_size - 1));
2065                                 if (prev + pginfo->u.fmr.fmr_pgsize != p) {
2066                                         ehca_gen_err("uncontiguous fmr pages "
2067                                                      "found prev=%lx p=%lx "
2068                                                      "idx=%x", prev, p, i + j);
2069                                         return -EINVAL;
2070                                 }
2071                                 prev = p;
2072                         }
2073                         pginfo->kpage_cnt += cnt_per_hwpage;
2074                         pginfo->u.fmr.next_listelem += cnt_per_hwpage;
2075                         fmrlist += cnt_per_hwpage;
2076                 }
2077                 kpage++;
2078         }
2079         return ret;
2080 }
2081
2082 /* setup page buffer from page info */
2083 int ehca_set_pagebuf(struct ehca_mr_pginfo *pginfo,
2084                      u32 number,
2085                      u64 *kpage)
2086 {
2087         int ret;
2088
2089         switch (pginfo->type) {
2090         case EHCA_MR_PGI_PHYS:
2091                 ret = ehca_set_pagebuf_phys(pginfo, number, kpage);
2092                 break;
2093         case EHCA_MR_PGI_USER:
2094                 ret = PAGE_SIZE >= pginfo->hwpage_size ?
2095                         ehca_set_pagebuf_user1(pginfo, number, kpage) :
2096                         ehca_set_pagebuf_user2(pginfo, number, kpage);
2097                 break;
2098         case EHCA_MR_PGI_FMR:
2099                 ret = ehca_set_pagebuf_fmr(pginfo, number, kpage);
2100                 break;
2101         default:
2102                 ehca_gen_err("bad pginfo->type=%x", pginfo->type);
2103                 ret = -EFAULT;
2104                 break;
2105         }
2106         return ret;
2107 } /* end ehca_set_pagebuf() */
2108
2109 /*----------------------------------------------------------------------*/
2110
2111 /*
2112  * check MR if it is a max-MR, i.e. uses whole memory
2113  * in case it's a max-MR 1 is returned, else 0
2114  */
2115 int ehca_mr_is_maxmr(u64 size,
2116                      u64 *iova_start)
2117 {
2118         /* a MR is treated as max-MR only if it fits following: */
2119         if ((size == ((u64)high_memory - PAGE_OFFSET)) &&
2120             (iova_start == (void *)KERNELBASE)) {
2121                 ehca_gen_dbg("this is a max-MR");
2122                 return 1;
2123         } else
2124                 return 0;
2125 } /* end ehca_mr_is_maxmr() */
2126
2127 /*----------------------------------------------------------------------*/
2128
2129 /* map access control for MR/MW. This routine is used for MR and MW. */
2130 void ehca_mrmw_map_acl(int ib_acl,
2131                        u32 *hipz_acl)
2132 {
2133         *hipz_acl = 0;
2134         if (ib_acl & IB_ACCESS_REMOTE_READ)
2135                 *hipz_acl |= HIPZ_ACCESSCTRL_R_READ;
2136         if (ib_acl & IB_ACCESS_REMOTE_WRITE)
2137                 *hipz_acl |= HIPZ_ACCESSCTRL_R_WRITE;
2138         if (ib_acl & IB_ACCESS_REMOTE_ATOMIC)
2139                 *hipz_acl |= HIPZ_ACCESSCTRL_R_ATOMIC;
2140         if (ib_acl & IB_ACCESS_LOCAL_WRITE)
2141                 *hipz_acl |= HIPZ_ACCESSCTRL_L_WRITE;
2142         if (ib_acl & IB_ACCESS_MW_BIND)
2143                 *hipz_acl |= HIPZ_ACCESSCTRL_MW_BIND;
2144 } /* end ehca_mrmw_map_acl() */
2145
2146 /*----------------------------------------------------------------------*/
2147
2148 /* sets page size in hipz access control for MR/MW. */
2149 void ehca_mrmw_set_pgsize_hipz_acl(u32 pgsize, u32 *hipz_acl) /*INOUT*/
2150 {
2151         *hipz_acl |= (ehca_encode_hwpage_size(pgsize) << 24);
2152 } /* end ehca_mrmw_set_pgsize_hipz_acl() */
2153
2154 /*----------------------------------------------------------------------*/
2155
2156 /*
2157  * reverse map access control for MR/MW.
2158  * This routine is used for MR and MW.
2159  */
2160 void ehca_mrmw_reverse_map_acl(const u32 *hipz_acl,
2161                                int *ib_acl) /*OUT*/
2162 {
2163         *ib_acl = 0;
2164         if (*hipz_acl & HIPZ_ACCESSCTRL_R_READ)
2165                 *ib_acl |= IB_ACCESS_REMOTE_READ;
2166         if (*hipz_acl & HIPZ_ACCESSCTRL_R_WRITE)
2167                 *ib_acl |= IB_ACCESS_REMOTE_WRITE;
2168         if (*hipz_acl & HIPZ_ACCESSCTRL_R_ATOMIC)
2169                 *ib_acl |= IB_ACCESS_REMOTE_ATOMIC;
2170         if (*hipz_acl & HIPZ_ACCESSCTRL_L_WRITE)
2171                 *ib_acl |= IB_ACCESS_LOCAL_WRITE;
2172         if (*hipz_acl & HIPZ_ACCESSCTRL_MW_BIND)
2173                 *ib_acl |= IB_ACCESS_MW_BIND;
2174 } /* end ehca_mrmw_reverse_map_acl() */
2175
2176
2177 /*----------------------------------------------------------------------*/
2178
2179 /*
2180  * MR destructor and constructor
2181  * used in Reregister MR verb, sets all fields in ehca_mr_t to 0,
2182  * except struct ib_mr and spinlock
2183  */
2184 void ehca_mr_deletenew(struct ehca_mr *mr)
2185 {
2186         mr->flags = 0;
2187         mr->num_kpages = 0;
2188         mr->num_hwpages = 0;
2189         mr->acl = 0;
2190         mr->start = NULL;
2191         mr->fmr_page_size = 0;
2192         mr->fmr_max_pages = 0;
2193         mr->fmr_max_maps = 0;
2194         mr->fmr_map_cnt = 0;
2195         memset(&mr->ipz_mr_handle, 0, sizeof(mr->ipz_mr_handle));
2196         memset(&mr->galpas, 0, sizeof(mr->galpas));
2197 } /* end ehca_mr_deletenew() */
2198
2199 int ehca_init_mrmw_cache(void)
2200 {
2201         mr_cache = kmem_cache_create("ehca_cache_mr",
2202                                      sizeof(struct ehca_mr), 0,
2203                                      SLAB_HWCACHE_ALIGN,
2204                                      NULL);
2205         if (!mr_cache)
2206                 return -ENOMEM;
2207         mw_cache = kmem_cache_create("ehca_cache_mw",
2208                                      sizeof(struct ehca_mw), 0,
2209                                      SLAB_HWCACHE_ALIGN,
2210                                      NULL);
2211         if (!mw_cache) {
2212                 kmem_cache_destroy(mr_cache);
2213                 mr_cache = NULL;
2214                 return -ENOMEM;
2215         }
2216         return 0;
2217 }
2218
2219 void ehca_cleanup_mrmw_cache(void)
2220 {
2221         if (mr_cache)
2222                 kmem_cache_destroy(mr_cache);
2223         if (mw_cache)
2224                 kmem_cache_destroy(mw_cache);
2225 }