drivers/infiniband/hw/mthca/mthca

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This source file includes following definitions.
mthca_buddy_alloc
mthca_buddy_free
mthca_buddy_init
mthca_buddy_cleanup
mthca_alloc_mtt_range
__mthca_alloc_mtt
mthca_alloc_mtt
mthca_free_mtt
__mthca_write_mtt
mthca_write_mtt_size
mthca_tavor_write_mtt_seg
mthca_arbel_write_mtt_seg
mthca_write_mtt
tavor_hw_index_to_key
tavor_key_to_hw_index
arbel_hw_index_to_key
arbel_key_to_hw_index
hw_index_to_key
key_to_hw_index
adjust_key
mthca_mr_alloc
mthca_mr_alloc_notrans
mthca_mr_alloc_phys
mthca_free_region
mthca_free_mr
mthca_fmr_alloc
mthca_free_fmr
mthca_check_fmr
mthca_tavor_map_phys_fmr
mthca_arbel_map_phys_fmr
mthca_tavor_fmr_unmap
mthca_arbel_fmr_unmap
mthca_init_mr_table
mthca_cleanup_mr_table
   1 /*
   2  * Copyright (c) 2004 Topspin Communications.  All rights reserved.
   3  * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the
   9  * OpenIB.org BSD license below:
  10  *
  11  *     Redistribution and use in source and binary forms, with or
  12  *     without modification, are permitted provided that the following
  13  *     conditions are met:
  14  *
  15  *      - Redistributions of source code must retain the above
  16  *        copyright notice, this list of conditions and the following
  17  *        disclaimer.
  18  *
  19  *      - Redistributions in binary form must reproduce the above
  20  *        copyright notice, this list of conditions and the following
  21  *        disclaimer in the documentation and/or other materials
  22  *        provided with the distribution.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31  * SOFTWARE.
  32  */
  33 
  34 #include <linux/slab.h>
  35 #include <linux/errno.h>
  36 
  37 #include "mthca_dev.h"
  38 #include "mthca_cmd.h"
  39 #include "mthca_memfree.h"
  40 
  41 struct mthca_mtt {
  42         struct mthca_buddy *buddy;
  43         int                 order;
  44         u32                 first_seg;
  45 };
  46 
  47 /*
  48  * Must be packed because mtt_seg is 64 bits but only aligned to 32 bits.
  49  */
  50 struct mthca_mpt_entry {
  51         __be32 flags;
  52         __be32 page_size;
  53         __be32 key;
  54         __be32 pd;
  55         __be64 start;
  56         __be64 length;
  57         __be32 lkey;
  58         __be32 window_count;
  59         __be32 window_count_limit;
  60         __be64 mtt_seg;
  61         __be32 mtt_sz;          /* Arbel only */
  62         u32    reserved[2];
  63 } __packed;
  64 
  65 #define MTHCA_MPT_FLAG_SW_OWNS       (0xfUL << 28)
  66 #define MTHCA_MPT_FLAG_MIO           (1 << 17)
  67 #define MTHCA_MPT_FLAG_BIND_ENABLE   (1 << 15)
  68 #define MTHCA_MPT_FLAG_PHYSICAL      (1 <<  9)
  69 #define MTHCA_MPT_FLAG_REGION        (1 <<  8)
  70 
  71 #define MTHCA_MTT_FLAG_PRESENT       1
  72 
  73 #define MTHCA_MPT_STATUS_SW 0xF0
  74 #define MTHCA_MPT_STATUS_HW 0x00
  75 
  76 #define SINAI_FMR_KEY_INC 0x1000000
  77 
  78 /*
  79  * Buddy allocator for MTT segments (currently not very efficient
  80  * since it doesn't keep a free list and just searches linearly
  81  * through the bitmaps)
  82  */
  83 
  84 static u32 mthca_buddy_alloc(struct mthca_buddy *buddy, int order)
  85 {
  86         int o;
  87         int m;
  88         u32 seg;
  89 
  90         spin_lock(&buddy->lock);
  91 
  92         for (o = order; o <= buddy->max_order; ++o)
  93                 if (buddy->num_free[o]) {
  94                         m = 1 << (buddy->max_order - o);
  95                         seg = find_first_bit(buddy->bits[o], m);
  96                         if (seg < m)
  97                                 goto found;
  98                 }
  99 
 100         spin_unlock(&buddy->lock);
 101         return -1;
 102 
 103  found:
 104         clear_bit(seg, buddy->bits[o]);
 105         --buddy->num_free[o];
 106 
 107         while (o > order) {
 108                 --o;
 109                 seg <<= 1;
 110                 set_bit(seg ^ 1, buddy->bits[o]);
 111                 ++buddy->num_free[o];
 112         }
 113 
 114         spin_unlock(&buddy->lock);
 115 
 116         seg <<= order;
 117 
 118         return seg;
 119 }
 120 
 121 static void mthca_buddy_free(struct mthca_buddy *buddy, u32 seg, int order)
 122 {
 123         seg >>= order;
 124 
 125         spin_lock(&buddy->lock);
 126 
 127         while (test_bit(seg ^ 1, buddy->bits[order])) {
 128                 clear_bit(seg ^ 1, buddy->bits[order]);
 129                 --buddy->num_free[order];
 130                 seg >>= 1;
 131                 ++order;
 132         }
 133 
 134         set_bit(seg, buddy->bits[order]);
 135         ++buddy->num_free[order];
 136 
 137         spin_unlock(&buddy->lock);
 138 }
 139 
 140 static int mthca_buddy_init(struct mthca_buddy *buddy, int max_order)
 141 {
 142         int i, s;
 143 
 144         buddy->max_order = max_order;
 145         spin_lock_init(&buddy->lock);
 146 
 147         buddy->bits = kcalloc(buddy->max_order + 1, sizeof(long *),
 148                               GFP_KERNEL);
 149         buddy->num_free = kcalloc((buddy->max_order + 1), sizeof *buddy->num_free,
 150                                   GFP_KERNEL);
 151         if (!buddy->bits || !buddy->num_free)
 152                 goto err_out;
 153 
 154         for (i = 0; i <= buddy->max_order; ++i) {
 155                 s = BITS_TO_LONGS(1 << (buddy->max_order - i));
 156                 buddy->bits[i] = kmalloc_array(s, sizeof(long), GFP_KERNEL);
 157                 if (!buddy->bits[i])
 158                         goto err_out_free;
 159                 bitmap_zero(buddy->bits[i],
 160                             1 << (buddy->max_order - i));
 161         }
 162 
 163         set_bit(0, buddy->bits[buddy->max_order]);
 164         buddy->num_free[buddy->max_order] = 1;
 165 
 166         return 0;
 167 
 168 err_out_free:
 169         for (i = 0; i <= buddy->max_order; ++i)
 170                 kfree(buddy->bits[i]);
 171 
 172 err_out:
 173         kfree(buddy->bits);
 174         kfree(buddy->num_free);
 175 
 176         return -ENOMEM;
 177 }
 178 
 179 static void mthca_buddy_cleanup(struct mthca_buddy *buddy)
 180 {
 181         int i;
 182 
 183         for (i = 0; i <= buddy->max_order; ++i)
 184                 kfree(buddy->bits[i]);
 185 
 186         kfree(buddy->bits);
 187         kfree(buddy->num_free);
 188 }
 189 
 190 static u32 mthca_alloc_mtt_range(struct mthca_dev *dev, int order,
 191                                  struct mthca_buddy *buddy)
 192 {
 193         u32 seg = mthca_buddy_alloc(buddy, order);
 194 
 195         if (seg == -1)
 196                 return -1;
 197 
 198         if (mthca_is_memfree(dev))
 199                 if (mthca_table_get_range(dev, dev->mr_table.mtt_table, seg,
 200                                           seg + (1 << order) - 1)) {
 201                         mthca_buddy_free(buddy, seg, order);
 202                         seg = -1;
 203                 }
 204 
 205         return seg;
 206 }
 207 
 208 static struct mthca_mtt *__mthca_alloc_mtt(struct mthca_dev *dev, int size,
 209                                            struct mthca_buddy *buddy)
 210 {
 211         struct mthca_mtt *mtt;
 212         int i;
 213 
 214         if (size <= 0)
 215                 return ERR_PTR(-EINVAL);
 216 
 217         mtt = kmalloc(sizeof *mtt, GFP_KERNEL);
 218         if (!mtt)
 219                 return ERR_PTR(-ENOMEM);
 220 
 221         mtt->buddy = buddy;
 222         mtt->order = 0;
 223         for (i = dev->limits.mtt_seg_size / 8; i < size; i <<= 1)
 224                 ++mtt->order;
 225 
 226         mtt->first_seg = mthca_alloc_mtt_range(dev, mtt->order, buddy);
 227         if (mtt->first_seg == -1) {
 228                 kfree(mtt);
 229                 return ERR_PTR(-ENOMEM);
 230         }
 231 
 232         return mtt;
 233 }
 234 
 235 struct mthca_mtt *mthca_alloc_mtt(struct mthca_dev *dev, int size)
 236 {
 237         return __mthca_alloc_mtt(dev, size, &dev->mr_table.mtt_buddy);
 238 }
 239 
 240 void mthca_free_mtt(struct mthca_dev *dev, struct mthca_mtt *mtt)
 241 {
 242         if (!mtt)
 243                 return;
 244 
 245         mthca_buddy_free(mtt->buddy, mtt->first_seg, mtt->order);
 246 
 247         mthca_table_put_range(dev, dev->mr_table.mtt_table,
 248                               mtt->first_seg,
 249                               mtt->first_seg + (1 << mtt->order) - 1);
 250 
 251         kfree(mtt);
 252 }
 253 
 254 static int __mthca_write_mtt(struct mthca_dev *dev, struct mthca_mtt *mtt,
 255                              int start_index, u64 *buffer_list, int list_len)
 256 {
 257         struct mthca_mailbox *mailbox;
 258         __be64 *mtt_entry;
 259         int err = 0;
 260         int i;
 261 
 262         mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
 263         if (IS_ERR(mailbox))
 264                 return PTR_ERR(mailbox);
 265         mtt_entry = mailbox->buf;
 266 
 267         while (list_len > 0) {
 268                 mtt_entry[0] = cpu_to_be64(dev->mr_table.mtt_base +
 269                                            mtt->first_seg * dev->limits.mtt_seg_size +
 270                                            start_index * 8);
 271                 mtt_entry[1] = 0;
 272                 for (i = 0; i < list_len && i < MTHCA_MAILBOX_SIZE / 8 - 2; ++i)
 273                         mtt_entry[i + 2] = cpu_to_be64(buffer_list[i] |
 274                                                        MTHCA_MTT_FLAG_PRESENT);
 275 
 276                 /*
 277                  * If we have an odd number of entries to write, add
 278                  * one more dummy entry for firmware efficiency.
 279                  */
 280                 if (i & 1)
 281                         mtt_entry[i + 2] = 0;
 282 
 283                 err = mthca_WRITE_MTT(dev, mailbox, (i + 1) & ~1);
 284                 if (err) {
 285                         mthca_warn(dev, "WRITE_MTT failed (%d)\n", err);
 286                         goto out;
 287                 }
 288 
 289                 list_len    -= i;
 290                 start_index += i;
 291                 buffer_list += i;
 292         }
 293 
 294 out:
 295         mthca_free_mailbox(dev, mailbox);
 296         return err;
 297 }
 298 
 299 int mthca_write_mtt_size(struct mthca_dev *dev)
 300 {
 301         if (dev->mr_table.fmr_mtt_buddy != &dev->mr_table.mtt_buddy ||
 302             !(dev->mthca_flags & MTHCA_FLAG_FMR))
 303                 /*
 304                  * Be friendly to WRITE_MTT command
 305                  * and leave two empty slots for the
 306                  * index and reserved fields of the
 307                  * mailbox.
 308                  */
 309                 return PAGE_SIZE / sizeof (u64) - 2;
 310 
 311         /* For Arbel, all MTTs must fit in the same page. */
 312         return mthca_is_memfree(dev) ? (PAGE_SIZE / sizeof (u64)) : 0x7ffffff;
 313 }
 314 
 315 static void mthca_tavor_write_mtt_seg(struct mthca_dev *dev,
 316                                       struct mthca_mtt *mtt, int start_index,
 317                                       u64 *buffer_list, int list_len)
 318 {
 319         u64 __iomem *mtts;
 320         int i;
 321 
 322         mtts = dev->mr_table.tavor_fmr.mtt_base + mtt->first_seg * dev->limits.mtt_seg_size +
 323                 start_index * sizeof (u64);
 324         for (i = 0; i < list_len; ++i)
 325                 mthca_write64_raw(cpu_to_be64(buffer_list[i] | MTHCA_MTT_FLAG_PRESENT),
 326                                   mtts + i);
 327 }
 328 
 329 static void mthca_arbel_write_mtt_seg(struct mthca_dev *dev,
 330                                       struct mthca_mtt *mtt, int start_index,
 331                                       u64 *buffer_list, int list_len)
 332 {
 333         __be64 *mtts;
 334         dma_addr_t dma_handle;
 335         int i;
 336         int s = start_index * sizeof (u64);
 337 
 338         /* For Arbel, all MTTs must fit in the same page. */
 339         BUG_ON(s / PAGE_SIZE != (s + list_len * sizeof(u64) - 1) / PAGE_SIZE);
 340         /* Require full segments */
 341         BUG_ON(s % dev->limits.mtt_seg_size);
 342 
 343         mtts = mthca_table_find(dev->mr_table.mtt_table, mtt->first_seg +
 344                                 s / dev->limits.mtt_seg_size, &dma_handle);
 345 
 346         BUG_ON(!mtts);
 347 
 348         dma_sync_single_for_cpu(&dev->pdev->dev, dma_handle,
 349                                 list_len * sizeof (u64), DMA_TO_DEVICE);
 350 
 351         for (i = 0; i < list_len; ++i)
 352                 mtts[i] = cpu_to_be64(buffer_list[i] | MTHCA_MTT_FLAG_PRESENT);
 353 
 354         dma_sync_single_for_device(&dev->pdev->dev, dma_handle,
 355                                    list_len * sizeof (u64), DMA_TO_DEVICE);
 356 }
 357 
 358 int mthca_write_mtt(struct mthca_dev *dev, struct mthca_mtt *mtt,
 359                     int start_index, u64 *buffer_list, int list_len)
 360 {
 361         int size = mthca_write_mtt_size(dev);
 362         int chunk;
 363 
 364         if (dev->mr_table.fmr_mtt_buddy != &dev->mr_table.mtt_buddy ||
 365             !(dev->mthca_flags & MTHCA_FLAG_FMR))
 366                 return __mthca_write_mtt(dev, mtt, start_index, buffer_list, list_len);
 367 
 368         while (list_len > 0) {
 369                 chunk = min(size, list_len);
 370                 if (mthca_is_memfree(dev))
 371                         mthca_arbel_write_mtt_seg(dev, mtt, start_index,
 372                                                   buffer_list, chunk);
 373                 else
 374                         mthca_tavor_write_mtt_seg(dev, mtt, start_index,
 375                                                   buffer_list, chunk);
 376 
 377                 list_len    -= chunk;
 378                 start_index += chunk;
 379                 buffer_list += chunk;
 380         }
 381 
 382         return 0;
 383 }
 384 
 385 static inline u32 tavor_hw_index_to_key(u32 ind)
 386 {
 387         return ind;
 388 }
 389 
 390 static inline u32 tavor_key_to_hw_index(u32 key)
 391 {
 392         return key;
 393 }
 394 
 395 static inline u32 arbel_hw_index_to_key(u32 ind)
 396 {
 397         return (ind >> 24) | (ind << 8);
 398 }
 399 
 400 static inline u32 arbel_key_to_hw_index(u32 key)
 401 {
 402         return (key << 24) | (key >> 8);
 403 }
 404 
 405 static inline u32 hw_index_to_key(struct mthca_dev *dev, u32 ind)
 406 {
 407         if (mthca_is_memfree(dev))
 408                 return arbel_hw_index_to_key(ind);
 409         else
 410                 return tavor_hw_index_to_key(ind);
 411 }
 412 
 413 static inline u32 key_to_hw_index(struct mthca_dev *dev, u32 key)
 414 {
 415         if (mthca_is_memfree(dev))
 416                 return arbel_key_to_hw_index(key);
 417         else
 418                 return tavor_key_to_hw_index(key);
 419 }
 420 
 421 static inline u32 adjust_key(struct mthca_dev *dev, u32 key)
 422 {
 423         if (dev->mthca_flags & MTHCA_FLAG_SINAI_OPT)
 424                 return ((key << 20) & 0x800000) | (key & 0x7fffff);
 425         else
 426                 return key;
 427 }
 428 
 429 int mthca_mr_alloc(struct mthca_dev *dev, u32 pd, int buffer_size_shift,
 430                    u64 iova, u64 total_size, u32 access, struct mthca_mr *mr)
 431 {
 432         struct mthca_mailbox *mailbox;
 433         struct mthca_mpt_entry *mpt_entry;
 434         u32 key;
 435         int i;
 436         int err;
 437 
 438         WARN_ON(buffer_size_shift >= 32);
 439 
 440         key = mthca_alloc(&dev->mr_table.mpt_alloc);
 441         if (key == -1)
 442                 return -ENOMEM;
 443         key = adjust_key(dev, key);
 444         mr->ibmr.rkey = mr->ibmr.lkey = hw_index_to_key(dev, key);
 445 
 446         if (mthca_is_memfree(dev)) {
 447                 err = mthca_table_get(dev, dev->mr_table.mpt_table, key);
 448                 if (err)
 449                         goto err_out_mpt_free;
 450         }
 451 
 452         mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
 453         if (IS_ERR(mailbox)) {
 454                 err = PTR_ERR(mailbox);
 455                 goto err_out_table;
 456         }
 457         mpt_entry = mailbox->buf;
 458 
 459         mpt_entry->flags = cpu_to_be32(MTHCA_MPT_FLAG_SW_OWNS     |
 460                                        MTHCA_MPT_FLAG_MIO         |
 461                                        MTHCA_MPT_FLAG_REGION      |
 462                                        access);
 463         if (!mr->mtt)
 464                 mpt_entry->flags |= cpu_to_be32(MTHCA_MPT_FLAG_PHYSICAL);
 465 
 466         mpt_entry->page_size = cpu_to_be32(buffer_size_shift - 12);
 467         mpt_entry->key       = cpu_to_be32(key);
 468         mpt_entry->pd        = cpu_to_be32(pd);
 469         mpt_entry->start     = cpu_to_be64(iova);
 470         mpt_entry->length    = cpu_to_be64(total_size);
 471 
 472         memset(&mpt_entry->lkey, 0,
 473                sizeof *mpt_entry - offsetof(struct mthca_mpt_entry, lkey));
 474 
 475         if (mr->mtt)
 476                 mpt_entry->mtt_seg =
 477                         cpu_to_be64(dev->mr_table.mtt_base +
 478                                     mr->mtt->first_seg * dev->limits.mtt_seg_size);
 479 
 480         if (0) {
 481                 mthca_dbg(dev, "Dumping MPT entry %08x:\n", mr->ibmr.lkey);
 482                 for (i = 0; i < sizeof (struct mthca_mpt_entry) / 4; ++i) {
 483                         if (i % 4 == 0)
 484                                 printk("[%02x] ", i * 4);
 485                         printk(" %08x", be32_to_cpu(((__be32 *) mpt_entry)[i]));
 486                         if ((i + 1) % 4 == 0)
 487                                 printk("\n");
 488                 }
 489         }
 490 
 491         err = mthca_SW2HW_MPT(dev, mailbox,
 492                               key & (dev->limits.num_mpts - 1));
 493         if (err) {
 494                 mthca_warn(dev, "SW2HW_MPT failed (%d)\n", err);
 495                 goto err_out_mailbox;
 496         }
 497 
 498         mthca_free_mailbox(dev, mailbox);
 499         return err;
 500 
 501 err_out_mailbox:
 502         mthca_free_mailbox(dev, mailbox);
 503 
 504 err_out_table:
 505         mthca_table_put(dev, dev->mr_table.mpt_table, key);
 506 
 507 err_out_mpt_free:
 508         mthca_free(&dev->mr_table.mpt_alloc, key);
 509         return err;
 510 }
 511 
 512 int mthca_mr_alloc_notrans(struct mthca_dev *dev, u32 pd,
 513                            u32 access, struct mthca_mr *mr)
 514 {
 515         mr->mtt = NULL;
 516         return mthca_mr_alloc(dev, pd, 12, 0, ~0ULL, access, mr);
 517 }
 518 
 519 int mthca_mr_alloc_phys(struct mthca_dev *dev, u32 pd,
 520                         u64 *buffer_list, int buffer_size_shift,
 521                         int list_len, u64 iova, u64 total_size,
 522                         u32 access, struct mthca_mr *mr)
 523 {
 524         int err;
 525 
 526         mr->mtt = mthca_alloc_mtt(dev, list_len);
 527         if (IS_ERR(mr->mtt))
 528                 return PTR_ERR(mr->mtt);
 529 
 530         err = mthca_write_mtt(dev, mr->mtt, 0, buffer_list, list_len);
 531         if (err) {
 532                 mthca_free_mtt(dev, mr->mtt);
 533                 return err;
 534         }
 535 
 536         err = mthca_mr_alloc(dev, pd, buffer_size_shift, iova,
 537                              total_size, access, mr);
 538         if (err)
 539                 mthca_free_mtt(dev, mr->mtt);
 540 
 541         return err;
 542 }
 543 
 544 /* Free mr or fmr */
 545 static void mthca_free_region(struct mthca_dev *dev, u32 lkey)
 546 {
 547         mthca_table_put(dev, dev->mr_table.mpt_table,
 548                         key_to_hw_index(dev, lkey));
 549 
 550         mthca_free(&dev->mr_table.mpt_alloc, key_to_hw_index(dev, lkey));
 551 }
 552 
 553 void mthca_free_mr(struct mthca_dev *dev, struct mthca_mr *mr)
 554 {
 555         int err;
 556 
 557         err = mthca_HW2SW_MPT(dev, NULL,
 558                               key_to_hw_index(dev, mr->ibmr.lkey) &
 559                               (dev->limits.num_mpts - 1));
 560         if (err)
 561                 mthca_warn(dev, "HW2SW_MPT failed (%d)\n", err);
 562 
 563         mthca_free_region(dev, mr->ibmr.lkey);
 564         mthca_free_mtt(dev, mr->mtt);
 565 }
 566 
 567 int mthca_fmr_alloc(struct mthca_dev *dev, u32 pd,
 568                     u32 access, struct mthca_fmr *mr)
 569 {
 570         struct mthca_mpt_entry *mpt_entry;
 571         struct mthca_mailbox *mailbox;
 572         u64 mtt_seg;
 573         u32 key, idx;
 574         int list_len = mr->attr.max_pages;
 575         int err = -ENOMEM;
 576         int i;
 577 
 578         if (mr->attr.page_shift < 12 || mr->attr.page_shift >= 32)
 579                 return -EINVAL;
 580 
 581         /* For Arbel, all MTTs must fit in the same page. */
 582         if (mthca_is_memfree(dev) &&
 583             mr->attr.max_pages * sizeof *mr->mem.arbel.mtts > PAGE_SIZE)
 584                 return -EINVAL;
 585 
 586         mr->maps = 0;
 587 
 588         key = mthca_alloc(&dev->mr_table.mpt_alloc);
 589         if (key == -1)
 590                 return -ENOMEM;
 591         key = adjust_key(dev, key);
 592 
 593         idx = key & (dev->limits.num_mpts - 1);
 594         mr->ibmr.rkey = mr->ibmr.lkey = hw_index_to_key(dev, key);
 595 
 596         if (mthca_is_memfree(dev)) {
 597                 err = mthca_table_get(dev, dev->mr_table.mpt_table, key);
 598                 if (err)
 599                         goto err_out_mpt_free;
 600 
 601                 mr->mem.arbel.mpt = mthca_table_find(dev->mr_table.mpt_table, key, NULL);
 602                 BUG_ON(!mr->mem.arbel.mpt);
 603         } else
 604                 mr->mem.tavor.mpt = dev->mr_table.tavor_fmr.mpt_base +
 605                         sizeof *(mr->mem.tavor.mpt) * idx;
 606 
 607         mr->mtt = __mthca_alloc_mtt(dev, list_len, dev->mr_table.fmr_mtt_buddy);
 608         if (IS_ERR(mr->mtt)) {
 609                 err = PTR_ERR(mr->mtt);
 610                 goto err_out_table;
 611         }
 612 
 613         mtt_seg = mr->mtt->first_seg * dev->limits.mtt_seg_size;
 614 
 615         if (mthca_is_memfree(dev)) {
 616                 mr->mem.arbel.mtts = mthca_table_find(dev->mr_table.mtt_table,
 617                                                       mr->mtt->first_seg,
 618                                                       &mr->mem.arbel.dma_handle);
 619                 BUG_ON(!mr->mem.arbel.mtts);
 620         } else
 621                 mr->mem.tavor.mtts = dev->mr_table.tavor_fmr.mtt_base + mtt_seg;
 622 
 623         mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
 624         if (IS_ERR(mailbox)) {
 625                 err = PTR_ERR(mailbox);
 626                 goto err_out_free_mtt;
 627         }
 628 
 629         mpt_entry = mailbox->buf;
 630 
 631         mpt_entry->flags = cpu_to_be32(MTHCA_MPT_FLAG_SW_OWNS     |
 632                                        MTHCA_MPT_FLAG_MIO         |
 633                                        MTHCA_MPT_FLAG_REGION      |
 634                                        access);
 635 
 636         mpt_entry->page_size = cpu_to_be32(mr->attr.page_shift - 12);
 637         mpt_entry->key       = cpu_to_be32(key);
 638         mpt_entry->pd        = cpu_to_be32(pd);
 639         memset(&mpt_entry->start, 0,
 640                sizeof *mpt_entry - offsetof(struct mthca_mpt_entry, start));
 641         mpt_entry->mtt_seg   = cpu_to_be64(dev->mr_table.mtt_base + mtt_seg);
 642 
 643         if (0) {
 644                 mthca_dbg(dev, "Dumping MPT entry %08x:\n", mr->ibmr.lkey);
 645                 for (i = 0; i < sizeof (struct mthca_mpt_entry) / 4; ++i) {
 646                         if (i % 4 == 0)
 647                                 printk("[%02x] ", i * 4);
 648                         printk(" %08x", be32_to_cpu(((__be32 *) mpt_entry)[i]));
 649                         if ((i + 1) % 4 == 0)
 650                                 printk("\n");
 651                 }
 652         }
 653 
 654         err = mthca_SW2HW_MPT(dev, mailbox,
 655                               key & (dev->limits.num_mpts - 1));
 656         if (err) {
 657                 mthca_warn(dev, "SW2HW_MPT failed (%d)\n", err);
 658                 goto err_out_mailbox_free;
 659         }
 660 
 661         mthca_free_mailbox(dev, mailbox);
 662         return 0;
 663 
 664 err_out_mailbox_free:
 665         mthca_free_mailbox(dev, mailbox);
 666 
 667 err_out_free_mtt:
 668         mthca_free_mtt(dev, mr->mtt);
 669 
 670 err_out_table:
 671         mthca_table_put(dev, dev->mr_table.mpt_table, key);
 672 
 673 err_out_mpt_free:
 674         mthca_free(&dev->mr_table.mpt_alloc, key);
 675         return err;
 676 }
 677 
 678 int mthca_free_fmr(struct mthca_dev *dev, struct mthca_fmr *fmr)
 679 {
 680         if (fmr->maps)
 681                 return -EBUSY;
 682 
 683         mthca_free_region(dev, fmr->ibmr.lkey);
 684         mthca_free_mtt(dev, fmr->mtt);
 685 
 686         return 0;
 687 }
 688 
 689 static inline int mthca_check_fmr(struct mthca_fmr *fmr, u64 *page_list,
 690                                   int list_len, u64 iova)
 691 {
 692         int i, page_mask;
 693 
 694         if (list_len > fmr->attr.max_pages)
 695                 return -EINVAL;
 696 
 697         page_mask = (1 << fmr->attr.page_shift) - 1;
 698 
 699         /* We are getting page lists, so va must be page aligned. */
 700         if (iova & page_mask)
 701                 return -EINVAL;
 702 
 703         /* Trust the user not to pass misaligned data in page_list */
 704         if (0)
 705                 for (i = 0; i < list_len; ++i) {
 706                         if (page_list[i] & ~page_mask)
 707                                 return -EINVAL;
 708                 }
 709 
 710         if (fmr->maps >= fmr->attr.max_maps)
 711                 return -EINVAL;
 712 
 713         return 0;
 714 }
 715 
 716 
 717 int mthca_tavor_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
 718                              int list_len, u64 iova)
 719 {
 720         struct mthca_fmr *fmr = to_mfmr(ibfmr);
 721         struct mthca_dev *dev = to_mdev(ibfmr->device);
 722         struct mthca_mpt_entry mpt_entry;
 723         u32 key;
 724         int i, err;
 725 
 726         err = mthca_check_fmr(fmr, page_list, list_len, iova);
 727         if (err)
 728                 return err;
 729 
 730         ++fmr->maps;
 731 
 732         key = tavor_key_to_hw_index(fmr->ibmr.lkey);
 733         key += dev->limits.num_mpts;
 734         fmr->ibmr.lkey = fmr->ibmr.rkey = tavor_hw_index_to_key(key);
 735 
 736         writeb(MTHCA_MPT_STATUS_SW, fmr->mem.tavor.mpt);
 737 
 738         for (i = 0; i < list_len; ++i) {
 739                 __be64 mtt_entry = cpu_to_be64(page_list[i] |
 740                                                MTHCA_MTT_FLAG_PRESENT);
 741                 mthca_write64_raw(mtt_entry, fmr->mem.tavor.mtts + i);
 742         }
 743 
 744         mpt_entry.lkey   = cpu_to_be32(key);
 745         mpt_entry.length = cpu_to_be64(list_len * (1ull << fmr->attr.page_shift));
 746         mpt_entry.start  = cpu_to_be64(iova);
 747 
 748         __raw_writel((__force u32) mpt_entry.lkey, &fmr->mem.tavor.mpt->key);
 749         memcpy_toio(&fmr->mem.tavor.mpt->start, &mpt_entry.start,
 750                     offsetof(struct mthca_mpt_entry, window_count) -
 751                     offsetof(struct mthca_mpt_entry, start));
 752 
 753         writeb(MTHCA_MPT_STATUS_HW, fmr->mem.tavor.mpt);
 754 
 755         return 0;
 756 }
 757 
 758 int mthca_arbel_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
 759                              int list_len, u64 iova)
 760 {
 761         struct mthca_fmr *fmr = to_mfmr(ibfmr);
 762         struct mthca_dev *dev = to_mdev(ibfmr->device);
 763         u32 key;
 764         int i, err;
 765 
 766         err = mthca_check_fmr(fmr, page_list, list_len, iova);
 767         if (err)
 768                 return err;
 769 
 770         ++fmr->maps;
 771 
 772         key = arbel_key_to_hw_index(fmr->ibmr.lkey);
 773         if (dev->mthca_flags & MTHCA_FLAG_SINAI_OPT)
 774                 key += SINAI_FMR_KEY_INC;
 775         else
 776                 key += dev->limits.num_mpts;
 777         fmr->ibmr.lkey = fmr->ibmr.rkey = arbel_hw_index_to_key(key);
 778 
 779         *(u8 *) fmr->mem.arbel.mpt = MTHCA_MPT_STATUS_SW;
 780 
 781         wmb();
 782 
 783         dma_sync_single_for_cpu(&dev->pdev->dev, fmr->mem.arbel.dma_handle,
 784                                 list_len * sizeof(u64), DMA_TO_DEVICE);
 785 
 786         for (i = 0; i < list_len; ++i)
 787                 fmr->mem.arbel.mtts[i] = cpu_to_be64(page_list[i] |
 788                                                      MTHCA_MTT_FLAG_PRESENT);
 789 
 790         dma_sync_single_for_device(&dev->pdev->dev, fmr->mem.arbel.dma_handle,
 791                                    list_len * sizeof(u64), DMA_TO_DEVICE);
 792 
 793         fmr->mem.arbel.mpt->key    = cpu_to_be32(key);
 794         fmr->mem.arbel.mpt->lkey   = cpu_to_be32(key);
 795         fmr->mem.arbel.mpt->length = cpu_to_be64(list_len * (1ull << fmr->attr.page_shift));
 796         fmr->mem.arbel.mpt->start  = cpu_to_be64(iova);
 797 
 798         wmb();
 799 
 800         *(u8 *) fmr->mem.arbel.mpt = MTHCA_MPT_STATUS_HW;
 801 
 802         wmb();
 803 
 804         return 0;
 805 }
 806 
 807 void mthca_tavor_fmr_unmap(struct mthca_dev *dev, struct mthca_fmr *fmr)
 808 {
 809         if (!fmr->maps)
 810                 return;
 811 
 812         fmr->maps = 0;
 813 
 814         writeb(MTHCA_MPT_STATUS_SW, fmr->mem.tavor.mpt);
 815 }
 816 
 817 void mthca_arbel_fmr_unmap(struct mthca_dev *dev, struct mthca_fmr *fmr)
 818 {
 819         if (!fmr->maps)
 820                 return;
 821 
 822         fmr->maps = 0;
 823 
 824         *(u8 *) fmr->mem.arbel.mpt = MTHCA_MPT_STATUS_SW;
 825 }
 826 
 827 int mthca_init_mr_table(struct mthca_dev *dev)
 828 {
 829         phys_addr_t addr;
 830         int mpts, mtts, err, i;
 831 
 832         err = mthca_alloc_init(&dev->mr_table.mpt_alloc,
 833                                dev->limits.num_mpts,
 834                                ~0, dev->limits.reserved_mrws);
 835         if (err)
 836                 return err;
 837 
 838         if (!mthca_is_memfree(dev) &&
 839             (dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN))
 840                 dev->limits.fmr_reserved_mtts = 0;
 841         else
 842                 dev->mthca_flags |= MTHCA_FLAG_FMR;
 843 
 844         if (dev->mthca_flags & MTHCA_FLAG_SINAI_OPT)
 845                 mthca_dbg(dev, "Memory key throughput optimization activated.\n");
 846 
 847         err = mthca_buddy_init(&dev->mr_table.mtt_buddy,
 848                                fls(dev->limits.num_mtt_segs - 1));
 849 
 850         if (err)
 851                 goto err_mtt_buddy;
 852 
 853         dev->mr_table.tavor_fmr.mpt_base = NULL;
 854         dev->mr_table.tavor_fmr.mtt_base = NULL;
 855 
 856         if (dev->limits.fmr_reserved_mtts) {
 857                 i = fls(dev->limits.fmr_reserved_mtts - 1);
 858 
 859                 if (i >= 31) {
 860                         mthca_warn(dev, "Unable to reserve 2^31 FMR MTTs.\n");
 861                         err = -EINVAL;
 862                         goto err_fmr_mpt;
 863                 }
 864                 mpts = mtts = 1 << i;
 865         } else {
 866                 mtts = dev->limits.num_mtt_segs;
 867                 mpts = dev->limits.num_mpts;
 868         }
 869 
 870         if (!mthca_is_memfree(dev) &&
 871             (dev->mthca_flags & MTHCA_FLAG_FMR)) {
 872 
 873                 addr = pci_resource_start(dev->pdev, 4) +
 874                         ((pci_resource_len(dev->pdev, 4) - 1) &
 875                          dev->mr_table.mpt_base);
 876 
 877                 dev->mr_table.tavor_fmr.mpt_base =
 878                         ioremap(addr, mpts * sizeof(struct mthca_mpt_entry));
 879 
 880                 if (!dev->mr_table.tavor_fmr.mpt_base) {
 881                         mthca_warn(dev, "MPT ioremap for FMR failed.\n");
 882                         err = -ENOMEM;
 883                         goto err_fmr_mpt;
 884                 }
 885 
 886                 addr = pci_resource_start(dev->pdev, 4) +
 887                         ((pci_resource_len(dev->pdev, 4) - 1) &
 888                          dev->mr_table.mtt_base);
 889 
 890                 dev->mr_table.tavor_fmr.mtt_base =
 891                         ioremap(addr, mtts * dev->limits.mtt_seg_size);
 892                 if (!dev->mr_table.tavor_fmr.mtt_base) {
 893                         mthca_warn(dev, "MTT ioremap for FMR failed.\n");
 894                         err = -ENOMEM;
 895                         goto err_fmr_mtt;
 896                 }
 897         }
 898 
 899         if (dev->limits.fmr_reserved_mtts) {
 900                 err = mthca_buddy_init(&dev->mr_table.tavor_fmr.mtt_buddy, fls(mtts - 1));
 901                 if (err)
 902                         goto err_fmr_mtt_buddy;
 903 
 904                 /* Prevent regular MRs from using FMR keys */
 905                 err = mthca_buddy_alloc(&dev->mr_table.mtt_buddy, fls(mtts - 1));
 906                 if (err)
 907                         goto err_reserve_fmr;
 908 
 909                 dev->mr_table.fmr_mtt_buddy =
 910                         &dev->mr_table.tavor_fmr.mtt_buddy;
 911         } else
 912                 dev->mr_table.fmr_mtt_buddy = &dev->mr_table.mtt_buddy;
 913 
 914         /* FMR table is always the first, take reserved MTTs out of there */
 915         if (dev->limits.reserved_mtts) {
 916                 i = fls(dev->limits.reserved_mtts - 1);
 917 
 918                 if (mthca_alloc_mtt_range(dev, i,
 919                                           dev->mr_table.fmr_mtt_buddy) == -1) {
 920                         mthca_warn(dev, "MTT table of order %d is too small.\n",
 921                                   dev->mr_table.fmr_mtt_buddy->max_order);
 922                         err = -ENOMEM;
 923                         goto err_reserve_mtts;
 924                 }
 925         }
 926 
 927         return 0;
 928 
 929 err_reserve_mtts:
 930 err_reserve_fmr:
 931         if (dev->limits.fmr_reserved_mtts)
 932                 mthca_buddy_cleanup(&dev->mr_table.tavor_fmr.mtt_buddy);
 933 
 934 err_fmr_mtt_buddy:
 935         if (dev->mr_table.tavor_fmr.mtt_base)
 936                 iounmap(dev->mr_table.tavor_fmr.mtt_base);
 937 
 938 err_fmr_mtt:
 939         if (dev->mr_table.tavor_fmr.mpt_base)
 940                 iounmap(dev->mr_table.tavor_fmr.mpt_base);
 941 
 942 err_fmr_mpt:
 943         mthca_buddy_cleanup(&dev->mr_table.mtt_buddy);
 944 
 945 err_mtt_buddy:
 946         mthca_alloc_cleanup(&dev->mr_table.mpt_alloc);
 947 
 948         return err;
 949 }
 950 
 951 void mthca_cleanup_mr_table(struct mthca_dev *dev)
 952 {
 953         /* XXX check if any MRs are still allocated? */
 954         if (dev->limits.fmr_reserved_mtts)
 955                 mthca_buddy_cleanup(&dev->mr_table.tavor_fmr.mtt_buddy);
 956 
 957         mthca_buddy_cleanup(&dev->mr_table.mtt_buddy);
 958 
 959         if (dev->mr_table.tavor_fmr.mtt_base)
 960                 iounmap(dev->mr_table.tavor_fmr.mtt_base);
 961         if (dev->mr_table.tavor_fmr.mpt_base)
 962                 iounmap(dev->mr_table.tavor_fmr.mpt_base);
 963 
 964         mthca_alloc_cleanup(&dev->mr_table.mpt_alloc);
 965 }
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/infiniband/hw/mthca/mthca_mr.c

DEFINITIONS
