drivers/staging/gma500/psb_gtt.c

   1 /*
   2  * Copyright (c) 2007, Intel Corporation.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  * Authors: Thomas Hellstrom <thomas-at-tungstengraphics.com>
  19  */
  20
  21 #include <drm/drmP.h>
  22 #include "psb_drv.h"
  23 #include "psb_pvr_glue.h"
  24
  25 static inline uint32_t psb_gtt_mask_pte(uint32_t pfn, int type)
  26 {
  27         uint32_t mask = PSB_PTE_VALID;
  28
  29         if (type & PSB_MMU_CACHED_MEMORY)
  30                 mask |= PSB_PTE_CACHED;
  31         if (type & PSB_MMU_RO_MEMORY)
  32                 mask |= PSB_PTE_RO;
  33         if (type & PSB_MMU_WO_MEMORY)
  34                 mask |= PSB_PTE_WO;
  35
  36         return (pfn << PAGE_SHIFT) | mask;
  37 }
  38
  39 struct psb_gtt *psb_gtt_alloc(struct drm_device *dev)
  40 {
  41         struct psb_gtt *tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);
  42
  43         if (!tmp)
  44                 return NULL;
  45
  46         init_rwsem(&tmp->sem);
  47         tmp->dev = dev;
  48
  49         return tmp;
  50 }
  51
  52 void psb_gtt_takedown(struct psb_gtt *pg, int free)
  53 {
  54         struct drm_psb_private *dev_priv = pg->dev->dev_private;
  55
  56         if (!pg)
  57                 return;
  58
  59         if (pg->gtt_map) {
  60                 iounmap(pg->gtt_map);
  61                 pg->gtt_map = NULL;
  62         }
  63         if (pg->initialized) {
  64                 pci_write_config_word(pg->dev->pdev, PSB_GMCH_CTRL,
  65                                       pg->gmch_ctrl);
  66                 PSB_WVDC32(pg->pge_ctl, PSB_PGETBL_CTL);
  67                 (void) PSB_RVDC32(PSB_PGETBL_CTL);
  68         }
  69         if (free)
  70                 kfree(pg);
  71 }
  72
  73 int psb_gtt_init(struct psb_gtt *pg, int resume)
  74 {
  75         struct drm_device *dev = pg->dev;
  76         struct drm_psb_private *dev_priv = dev->dev_private;
  77         unsigned gtt_pages;
  78         unsigned long stolen_size, vram_stolen_size, ci_stolen_size;
  79         unsigned long rar_stolen_size;
  80         unsigned i, num_pages;
  81         unsigned pfn_base;
  82         uint32_t ci_pages, vram_pages;
  83         uint32_t tt_pages;
  84         uint32_t *ttm_gtt_map;
  85         uint32_t dvmt_mode = 0;
  86
  87         int ret = 0;
  88         uint32_t pte;
  89
  90         pci_read_config_word(dev->pdev, PSB_GMCH_CTRL, &pg->gmch_ctrl);
  91         pci_write_config_word(dev->pdev, PSB_GMCH_CTRL,
  92                               pg->gmch_ctrl | _PSB_GMCH_ENABLED);
  93
  94         pg->pge_ctl = PSB_RVDC32(PSB_PGETBL_CTL);
  95         PSB_WVDC32(pg->pge_ctl | _PSB_PGETBL_ENABLED, PSB_PGETBL_CTL);
  96         (void) PSB_RVDC32(PSB_PGETBL_CTL);
  97
  98         pg->initialized = 1;
  99
 100         pg->gtt_phys_start = pg->pge_ctl & PAGE_MASK;
 101
 102         pg->gatt_start = pci_resource_start(dev->pdev, PSB_GATT_RESOURCE);
 103         /* fix me: video mmu has hw bug to access 0x0D0000000,
 104          * then make gatt start at 0x0e000,0000 */
 105         pg->mmu_gatt_start = PSB_MEM_TT_START;
 106         pg->gtt_start = pci_resource_start(dev->pdev, PSB_GTT_RESOURCE);
 107         gtt_pages =
 108             pci_resource_len(dev->pdev, PSB_GTT_RESOURCE) >> PAGE_SHIFT;
 109         pg->gatt_pages = pci_resource_len(dev->pdev, PSB_GATT_RESOURCE)
 110             >> PAGE_SHIFT;
 111
 112         pci_read_config_dword(dev->pdev, PSB_BSM, &pg->stolen_base);
 113         vram_stolen_size = pg->gtt_phys_start - pg->stolen_base - PAGE_SIZE;
 114
 115         /* CI is not included in the stolen size since the TOPAZ MMU bug */
 116         ci_stolen_size = dev_priv->ci_region_size;
 117         /* Don't add CI & RAR share buffer space
 118          * managed by TTM to stolen_size */
 119         stolen_size = vram_stolen_size;
 120
 121         rar_stolen_size = dev_priv->rar_region_size;
 122
 123         printk(KERN_INFO"GMMADR(region 0) start: 0x%08x (%dM).\n",
 124                 pg->gatt_start, pg->gatt_pages/256);
 125         printk(KERN_INFO"GTTADR(region 3) start: 0x%08x (can map %dM RAM), and actual RAM base 0x%08x.\n",
 126                 pg->gtt_start, gtt_pages * 4, pg->gtt_phys_start);
 127         printk(KERN_INFO "Stole memory information\n");
 128         printk(KERN_INFO "      base in RAM: 0x%x\n", pg->stolen_base);
 129         printk(KERN_INFO "      size: %luK, calculated by (GTT RAM base) - (Stolen base), seems wrong\n",
 130                 vram_stolen_size/1024);
 131         dvmt_mode = (pg->gmch_ctrl >> 4) & 0x7;
 132         printk(KERN_INFO "      the correct size should be: %dM(dvmt mode=%d)\n",
 133                 (dvmt_mode == 1) ? 1 : (2 << (dvmt_mode - 1)), dvmt_mode);
 134
 135         if (ci_stolen_size > 0)
 136                 printk(KERN_INFO"CI Stole memory: RAM base = 0x%08x, size = %lu M\n",
 137                                 dev_priv->ci_region_start,
 138                                 ci_stolen_size / 1024 / 1024);
 139         if (rar_stolen_size > 0)
 140                 printk(KERN_INFO "RAR Stole memory: RAM base = 0x%08x, size = %lu M\n",
 141                         dev_priv->rar_region_start,
 142                         rar_stolen_size / 1024 / 1024);
 143
 144         if (resume && (gtt_pages != pg->gtt_pages) &&
 145             (stolen_size != pg->stolen_size)) {
 146                 DRM_ERROR("GTT resume error.\n");
 147                 ret = -EINVAL;
 148                 goto out_err;
 149         }
 150
 151         pg->gtt_pages = gtt_pages;
 152         pg->stolen_size = stolen_size;
 153         pg->vram_stolen_size = vram_stolen_size;
 154         pg->ci_stolen_size = ci_stolen_size;
 155         pg->rar_stolen_size = rar_stolen_size;
 156         pg->gtt_map =
 157             ioremap_nocache(pg->gtt_phys_start, gtt_pages << PAGE_SHIFT);
 158         if (!pg->gtt_map) {
 159                 DRM_ERROR("Failure to map gtt.\n");
 160                 ret = -ENOMEM;
 161                 goto out_err;
 162         }
 163
 164         pg->vram_addr = ioremap_wc(pg->stolen_base, stolen_size);
 165         if (!pg->vram_addr) {
 166                 DRM_ERROR("Failure to map stolen base.\n");
 167                 ret = -ENOMEM;
 168                 goto out_err;
 169         }
 170
 171         DRM_DEBUG("%s: vram kernel virtual address %p\n", pg->vram_addr);
 172
 173         tt_pages = (pg->gatt_pages < PSB_TT_PRIV0_PLIMIT) ?
 174                 (pg->gatt_pages) : PSB_TT_PRIV0_PLIMIT;
 175
 176         ttm_gtt_map = pg->gtt_map + tt_pages / 2;
 177
 178         /*
 179          * insert vram stolen pages.
 180          */
 181
 182         pfn_base = pg->stolen_base >> PAGE_SHIFT;
 183         vram_pages = num_pages = vram_stolen_size >> PAGE_SHIFT;
 184         printk(KERN_INFO"Set up %d stolen pages starting at 0x%08x, GTT offset %dK\n",
 185                 num_pages, pfn_base, 0);
 186         for (i = 0; i < num_pages; ++i) {
 187                 pte = psb_gtt_mask_pte(pfn_base + i, 0);
 188                 iowrite32(pte, pg->gtt_map + i);
 189         }
 190
 191         /*
 192          * Init rest of gtt managed by IMG.
 193          */
 194         pfn_base = page_to_pfn(dev_priv->scratch_page);
 195         pte = psb_gtt_mask_pte(pfn_base, 0);
 196         for (; i < tt_pages / 2 - 1; ++i)
 197                 iowrite32(pte, pg->gtt_map + i);
 198
 199         /*
 200          * insert CI stolen pages
 201          */
 202
 203         pfn_base = dev_priv->ci_region_start >> PAGE_SHIFT;
 204         ci_pages = num_pages = ci_stolen_size >> PAGE_SHIFT;
 205         printk(KERN_INFO"Set up %d CI stolen pages starting at 0x%08x, GTT offset %dK\n",
 206                num_pages, pfn_base, (ttm_gtt_map - pg->gtt_map) * 4);
 207         for (i = 0; i < num_pages; ++i) {
 208                 pte = psb_gtt_mask_pte(pfn_base + i, 0);
 209                 iowrite32(pte, ttm_gtt_map + i);
 210         }
 211
 212         /*
 213          * insert RAR stolen pages
 214          */
 215         if (rar_stolen_size != 0) {
 216                 pfn_base = dev_priv->rar_region_start >> PAGE_SHIFT;
 217                 num_pages = rar_stolen_size >> PAGE_SHIFT;
 218                 printk(KERN_INFO"Set up %d RAR stolen pages starting at 0x%08x, GTT offset %dK\n",
 219                         num_pages, pfn_base,
 220                         (ttm_gtt_map - pg->gtt_map + i) * 4);
 221                 for (; i < num_pages + ci_pages; ++i) {
 222                         pte = psb_gtt_mask_pte(pfn_base + i - ci_pages, 0);
 223                         iowrite32(pte, ttm_gtt_map + i);
 224                 }
 225         }
 226         /*
 227          * Init rest of gtt managed by TTM.
 228          */
 229
 230         pfn_base = page_to_pfn(dev_priv->scratch_page);
 231         pte = psb_gtt_mask_pte(pfn_base, 0);
 232         PSB_DEBUG_INIT("Initializing the rest of a total "
 233                        "of %d gtt pages.\n", pg->gatt_pages);
 234
 235         for (; i < pg->gatt_pages - tt_pages / 2; ++i)
 236                 iowrite32(pte, ttm_gtt_map + i);
 237         (void) ioread32(pg->gtt_map + i - 1);
 238
 239         return 0;
 240
 241 out_err:
 242         psb_gtt_takedown(pg, 0);
 243         return ret;
 244 }
 245
 246 int psb_gtt_insert_pages(struct psb_gtt *pg, struct page **pages,
 247                          unsigned offset_pages, unsigned num_pages,
 248                          unsigned desired_tile_stride,
 249                          unsigned hw_tile_stride, int type)
 250 {
 251         unsigned rows = 1;
 252         unsigned add;
 253         unsigned row_add;
 254         unsigned i;
 255         unsigned j;
 256         uint32_t *cur_page = NULL;
 257         uint32_t pte;
 258
 259         if (hw_tile_stride)
 260                 rows = num_pages / desired_tile_stride;
 261         else
 262                 desired_tile_stride = num_pages;
 263
 264         add = desired_tile_stride;
 265         row_add = hw_tile_stride;
 266
 267         down_read(&pg->sem);
 268         for (i = 0; i < rows; ++i) {
 269                 cur_page = pg->gtt_map + offset_pages;
 270                 for (j = 0; j < desired_tile_stride; ++j) {
 271                         pte =
 272                             psb_gtt_mask_pte(page_to_pfn(*pages++), type);
 273                         iowrite32(pte, cur_page++);
 274                 }
 275                 offset_pages += add;
 276         }
 277         (void) ioread32(cur_page - 1);
 278         up_read(&pg->sem);
 279
 280         return 0;
 281 }
 282
 283 int psb_gtt_insert_phys_addresses(struct psb_gtt *pg, dma_addr_t *pPhysFrames,
 284                         unsigned offset_pages, unsigned num_pages, int type)
 285 {
 286         unsigned j;
 287         uint32_t *cur_page = NULL;
 288         uint32_t pte;
 289         u32 ba;
 290
 291         down_read(&pg->sem);
 292         cur_page = pg->gtt_map + offset_pages;
 293         for (j = 0; j < num_pages; ++j) {
 294                 ba = *pPhysFrames++;
 295                 pte =  psb_gtt_mask_pte(ba >> PAGE_SHIFT, type);
 296                 iowrite32(pte, cur_page++);
 297         }
 298         (void) ioread32(cur_page - 1);
 299         up_read(&pg->sem);
 300         return 0;
 301 }
 302
 303 int psb_gtt_remove_pages(struct psb_gtt *pg, unsigned offset_pages,
 304                          unsigned num_pages, unsigned desired_tile_stride,
 305                          unsigned hw_tile_stride, int rc_prot)
 306 {
 307         struct drm_psb_private *dev_priv = pg->dev->dev_private;
 308         unsigned rows = 1;
 309         unsigned add;
 310         unsigned row_add;
 311         unsigned i;
 312         unsigned j;
 313         uint32_t *cur_page = NULL;
 314         unsigned pfn_base = page_to_pfn(dev_priv->scratch_page);
 315         uint32_t pte = psb_gtt_mask_pte(pfn_base, 0);
 316
 317         if (hw_tile_stride)
 318                 rows = num_pages / desired_tile_stride;
 319         else
 320                 desired_tile_stride = num_pages;
 321
 322         add = desired_tile_stride;
 323         row_add = hw_tile_stride;
 324
 325         if (rc_prot)
 326                 down_read(&pg->sem);
 327         for (i = 0; i < rows; ++i) {
 328                 cur_page = pg->gtt_map + offset_pages;
 329                 for (j = 0; j < desired_tile_stride; ++j)
 330                         iowrite32(pte, cur_page++);
 331
 332                 offset_pages += add;
 333         }
 334         (void) ioread32(cur_page - 1);
 335         if (rc_prot)
 336                 up_read(&pg->sem);
 337
 338         return 0;
 339 }
 340
 341 int psb_gtt_mm_init(struct psb_gtt *pg)
 342 {
 343         struct psb_gtt_mm *gtt_mm;
 344         struct drm_psb_private *dev_priv = pg->dev->dev_private;
 345         struct drm_open_hash *ht;
 346         struct drm_mm *mm;
 347         int ret;
 348         uint32_t tt_start;
 349         uint32_t tt_size;
 350
 351         if (!pg || !pg->initialized) {
 352                 DRM_DEBUG("Invalid gtt struct\n");
 353                 return -EINVAL;
 354         }
 355
 356         gtt_mm =  kzalloc(sizeof(struct psb_gtt_mm), GFP_KERNEL);
 357         if (!gtt_mm)
 358                 return -ENOMEM;
 359
 360         spin_lock_init(&gtt_mm->lock);
 361
 362         ht = &gtt_mm->hash;
 363         ret = drm_ht_create(ht, 20);
 364         if (ret) {
 365                 DRM_DEBUG("Create hash table failed(%d)\n", ret);
 366                 goto err_free;
 367         }
 368
 369         tt_start = (pg->stolen_size + PAGE_SIZE - 1) >> PAGE_SHIFT;
 370         tt_start = (tt_start < pg->gatt_pages) ? tt_start : pg->gatt_pages;
 371         tt_size = (pg->gatt_pages < PSB_TT_PRIV0_PLIMIT) ?
 372                         (pg->gatt_pages) : PSB_TT_PRIV0_PLIMIT;
 373
 374         mm = &gtt_mm->base;
 375
 376         /*will use tt_start ~ 128M for IMG TT buffers*/
 377         ret = drm_mm_init(mm, tt_start, ((tt_size / 2) - tt_start));
 378         if (ret) {
 379                 DRM_DEBUG("drm_mm_int error(%d)\n", ret);
 380                 goto err_mm_init;
 381         }
 382
 383         gtt_mm->count = 0;
 384
 385         dev_priv->gtt_mm = gtt_mm;
 386
 387         DRM_INFO("PSB GTT mem manager ready, tt_start %ld, tt_size %ld pages\n",
 388                 (unsigned long)tt_start,
 389                 (unsigned long)((tt_size / 2) - tt_start));
 390         return 0;
 391 err_mm_init:
 392         drm_ht_remove(ht);
 393
 394 err_free:
 395         kfree(gtt_mm);
 396         return ret;
 397 }
 398
 399 /**
 400  * Delete all hash entries;
 401  */
 402 void psb_gtt_mm_takedown(void)
 403 {
 404         return;
 405 }
 406
 407 static int psb_gtt_mm_get_ht_by_pid_locked(struct psb_gtt_mm *mm,
 408                                     u32 tgid,
 409                                     struct psb_gtt_hash_entry **hentry)
 410 {
 411         struct drm_hash_item *entry;
 412         struct psb_gtt_hash_entry *psb_entry;
 413         int ret;
 414
 415         ret = drm_ht_find_item(&mm->hash, tgid, &entry);
 416         if (ret) {
 417                 DRM_DEBUG("Cannot find entry pid=%ld\n", tgid);
 418                 return ret;
 419         }
 420
 421         psb_entry = container_of(entry, struct psb_gtt_hash_entry, item);
 422         if (!psb_entry) {
 423                 DRM_DEBUG("Invalid entry");
 424                 return -EINVAL;
 425         }
 426
 427         *hentry = psb_entry;
 428         return 0;
 429 }
 430
 431
 432 static int psb_gtt_mm_insert_ht_locked(struct psb_gtt_mm *mm,
 433                                        u32 tgid,
 434                                        struct psb_gtt_hash_entry *hentry)
 435 {
 436         struct drm_hash_item *item;
 437         int ret;
 438
 439         if (!hentry) {
 440                 DRM_DEBUG("Invalid parameters\n");
 441                 return -EINVAL;
 442         }
 443
 444         item = &hentry->item;
 445         item->key = tgid;
 446
 447         /**
 448          * NOTE: drm_ht_insert_item will perform such a check
 449         ret = psb_gtt_mm_get_ht_by_pid(mm, tgid, &tmp);
 450         if (!ret) {
 451                 DRM_DEBUG("Entry already exists for pid %ld\n", tgid);
 452                 return -EAGAIN;
 453         }
 454         */
 455
 456         /*Insert the given entry*/
 457         ret = drm_ht_insert_item(&mm->hash, item);
 458         if (ret) {
 459                 DRM_DEBUG("Insert failure\n");
 460                 return ret;
 461         }
 462
 463         mm->count++;
 464
 465         return 0;
 466 }
 467
 468 static int psb_gtt_mm_alloc_insert_ht(struct psb_gtt_mm *mm,
 469                                       u32 tgid,
 470                                       struct psb_gtt_hash_entry **entry)
 471 {
 472         struct psb_gtt_hash_entry *hentry;
 473         int ret;
 474
 475         /*if the hentry for this tgid exists, just get it and return*/
 476         spin_lock(&mm->lock);
 477         ret = psb_gtt_mm_get_ht_by_pid_locked(mm, tgid, &hentry);
 478         if (!ret) {
 479                 DRM_DEBUG("Entry for tgid %ld exist, hentry %p\n",
 480                           tgid, hentry);
 481                 *entry = hentry;
 482                 spin_unlock(&mm->lock);
 483                 return 0;
 484         }
 485         spin_unlock(&mm->lock);
 486
 487         DRM_DEBUG("Entry for tgid %ld doesn't exist, will create it\n", tgid);
 488
 489         hentry = kzalloc(sizeof(struct psb_gtt_hash_entry), GFP_KERNEL);
 490         if (!hentry) {
 491                 DRM_DEBUG("Kmalloc failled\n");
 492                 return -ENOMEM;
 493         }
 494
 495         ret = drm_ht_create(&hentry->ht, 20);
 496         if (ret) {
 497                 DRM_DEBUG("Create hash table failed\n");
 498                 return ret;
 499         }
 500
 501         spin_lock(&mm->lock);
 502         ret = psb_gtt_mm_insert_ht_locked(mm, tgid, hentry);
 503         spin_unlock(&mm->lock);
 504
 505         if (!ret)
 506                 *entry = hentry;
 507
 508         return ret;
 509 }
 510
 511 static struct psb_gtt_hash_entry *
 512 psb_gtt_mm_remove_ht_locked(struct psb_gtt_mm *mm, u32 tgid)
 513 {
 514         struct psb_gtt_hash_entry *tmp;
 515         int ret;
 516
 517         ret = psb_gtt_mm_get_ht_by_pid_locked(mm, tgid, &tmp);
 518         if (ret) {
 519                 DRM_DEBUG("Cannot find entry pid %ld\n", tgid);
 520                 return NULL;
 521         }
 522
 523         /*remove it from ht*/
 524         drm_ht_remove_item(&mm->hash, &tmp->item);
 525
 526         mm->count--;
 527
 528         return tmp;
 529 }
 530
 531 static int psb_gtt_mm_remove_free_ht_locked(struct psb_gtt_mm *mm, u32 tgid)
 532 {
 533         struct psb_gtt_hash_entry *entry;
 534
 535         entry = psb_gtt_mm_remove_ht_locked(mm, tgid);
 536
 537         if (!entry) {
 538                 DRM_DEBUG("Invalid entry");
 539                 return -EINVAL;
 540         }
 541
 542         /*delete ht*/
 543         drm_ht_remove(&entry->ht);
 544
 545         /*free this entry*/
 546         kfree(entry);
 547         return 0;
 548 }
 549
 550 static int
 551 psb_gtt_mm_get_mem_mapping_locked(struct drm_open_hash *ht,
 552                            u32 key,
 553                            struct psb_gtt_mem_mapping **hentry)
 554 {
 555         struct drm_hash_item *entry;
 556         struct psb_gtt_mem_mapping *mapping;
 557         int ret;
 558
 559         ret = drm_ht_find_item(ht, key, &entry);
 560         if (ret) {
 561                 DRM_DEBUG("Cannot find key %ld\n", key);
 562                 return ret;
 563         }
 564
 565         mapping =  container_of(entry, struct psb_gtt_mem_mapping, item);
 566         if (!mapping) {
 567                 DRM_DEBUG("Invalid entry\n");
 568                 return -EINVAL;
 569         }
 570
 571         *hentry = mapping;
 572         return 0;
 573 }
 574
 575 static int
 576 psb_gtt_mm_insert_mem_mapping_locked(struct drm_open_hash *ht,
 577                               u32 key,
 578                               struct psb_gtt_mem_mapping *hentry)
 579 {
 580         struct drm_hash_item *item;
 581         struct psb_gtt_hash_entry *entry;
 582         int ret;
 583
 584         if (!hentry) {
 585                 DRM_DEBUG("hentry is NULL\n");
 586                 return -EINVAL;
 587         }
 588
 589         item = &hentry->item;
 590         item->key = key;
 591
 592         ret = drm_ht_insert_item(ht, item);
 593         if (ret) {
 594                 DRM_DEBUG("insert_item failed\n");
 595                 return ret;
 596         }
 597
 598         entry = container_of(ht, struct psb_gtt_hash_entry, ht);
 599         if (entry)
 600                 entry->count++;
 601
 602         return 0;
 603 }
 604
 605 static int
 606 psb_gtt_mm_alloc_insert_mem_mapping(struct psb_gtt_mm *mm,
 607                                     struct drm_open_hash *ht,
 608                                     u32 key,
 609                                     struct drm_mm_node *node,
 610                                     struct psb_gtt_mem_mapping **entry)
 611 {
 612         struct psb_gtt_mem_mapping *mapping;
 613         int ret;
 614
 615         if (!node || !ht) {
 616                 DRM_DEBUG("parameter error\n");
 617                 return -EINVAL;
 618         }
 619
 620         /*try to get this mem_map */
 621         spin_lock(&mm->lock);
 622         ret = psb_gtt_mm_get_mem_mapping_locked(ht, key, &mapping);
 623         if (!ret) {
 624                 DRM_DEBUG("mapping entry for key %ld exists, entry %p\n",
 625                           key, mapping);
 626                 *entry = mapping;
 627                 spin_unlock(&mm->lock);
 628                 return 0;
 629         }
 630         spin_unlock(&mm->lock);
 631
 632         DRM_DEBUG("Mapping entry for key %ld doesn't exist, will create it\n",
 633                   key);
 634
 635         mapping = kzalloc(sizeof(struct psb_gtt_mem_mapping), GFP_KERNEL);
 636         if (!mapping) {
 637                 DRM_DEBUG("kmalloc failed\n");
 638                 return -ENOMEM;
 639         }
 640
 641         mapping->node = node;
 642
 643         spin_lock(&mm->lock);
 644         ret = psb_gtt_mm_insert_mem_mapping_locked(ht, key, mapping);
 645         spin_unlock(&mm->lock);
 646
 647         if (!ret)
 648                 *entry = mapping;
 649
 650         return ret;
 651 }
 652
 653 static struct psb_gtt_mem_mapping *
 654 psb_gtt_mm_remove_mem_mapping_locked(struct drm_open_hash *ht, u32 key)
 655 {
 656         struct psb_gtt_mem_mapping *tmp;
 657         struct psb_gtt_hash_entry *entry;
 658         int ret;
 659
 660         ret = psb_gtt_mm_get_mem_mapping_locked(ht, key, &tmp);
 661         if (ret) {
 662                 DRM_DEBUG("Cannot find key %ld\n", key);
 663                 return NULL;
 664         }
 665
 666         drm_ht_remove_item(ht, &tmp->item);
 667
 668         entry = container_of(ht, struct psb_gtt_hash_entry, ht);
 669         if (entry)
 670                 entry->count--;
 671
 672         return tmp;
 673 }
 674
 675 static int psb_gtt_mm_remove_free_mem_mapping_locked(struct drm_open_hash *ht,
 676                                               u32 key,
 677                                               struct drm_mm_node **node)
 678 {
 679         struct psb_gtt_mem_mapping *entry;
 680
 681         entry = psb_gtt_mm_remove_mem_mapping_locked(ht, key);
 682         if (!entry) {
 683                 DRM_DEBUG("entry is NULL\n");
 684                 return -EINVAL;
 685         }
 686
 687         *node = entry->node;
 688
 689         kfree(entry);
 690         return 0;
 691 }
 692
 693 static int psb_gtt_add_node(struct psb_gtt_mm *mm,
 694                             u32 tgid,
 695                             u32 key,
 696                             struct drm_mm_node *node,
 697                             struct psb_gtt_mem_mapping **entry)
 698 {
 699         struct psb_gtt_hash_entry *hentry;
 700         struct psb_gtt_mem_mapping *mapping;
 701         int ret;
 702
 703         ret = psb_gtt_mm_alloc_insert_ht(mm, tgid, &hentry);
 704         if (ret) {
 705                 DRM_DEBUG("alloc_insert failed\n");
 706                 return ret;
 707         }
 708
 709         ret = psb_gtt_mm_alloc_insert_mem_mapping(mm,
 710                                                   &hentry->ht,
 711                                                   key,
 712                                                   node,
 713                                                   &mapping);
 714         if (ret) {
 715                 DRM_DEBUG("mapping alloc_insert failed\n");
 716                 return ret;
 717         }
 718
 719         *entry = mapping;
 720
 721         return 0;
 722 }
 723
 724 static int psb_gtt_remove_node(struct psb_gtt_mm *mm,
 725                                u32 tgid,
 726                                u32 key,
 727                                struct drm_mm_node **node)
 728 {
 729         struct psb_gtt_hash_entry *hentry;
 730         struct drm_mm_node *tmp;
 731         int ret;
 732
 733         spin_lock(&mm->lock);
 734         ret = psb_gtt_mm_get_ht_by_pid_locked(mm, tgid, &hentry);
 735         if (ret) {
 736                 DRM_DEBUG("Cannot find entry for pid %ld\n", tgid);
 737                 spin_unlock(&mm->lock);
 738                 return ret;
 739         }
 740         spin_unlock(&mm->lock);
 741
 742         /*remove mapping entry*/
 743         spin_lock(&mm->lock);
 744         ret = psb_gtt_mm_remove_free_mem_mapping_locked(&hentry->ht,
 745                                                         key,
 746                                                         &tmp);
 747         if (ret) {
 748                 DRM_DEBUG("remove_free failed\n");
 749                 spin_unlock(&mm->lock);
 750                 return ret;
 751         }
 752
 753         *node = tmp;
 754
 755         /*check the count of mapping entry*/
 756         if (!hentry->count) {
 757                 DRM_DEBUG("count of mapping entry is zero, tgid=%ld\n", tgid);
 758                 psb_gtt_mm_remove_free_ht_locked(mm, tgid);
 759         }
 760
 761         spin_unlock(&mm->lock);
 762
 763         return 0;
 764 }
 765
 766 static int psb_gtt_mm_alloc_mem(struct psb_gtt_mm *mm,
 767                                 uint32_t pages,
 768                                 uint32_t align,
 769                                 struct drm_mm_node **node)
 770 {
 771         struct drm_mm_node *tmp_node;
 772         int ret;
 773
 774         do {
 775                 ret = drm_mm_pre_get(&mm->base);
 776                 if (unlikely(ret)) {
 777                         DRM_DEBUG("drm_mm_pre_get error\n");
 778                         return ret;
 779                 }
 780
 781                 spin_lock(&mm->lock);
 782                 tmp_node = drm_mm_search_free(&mm->base, pages, align, 1);
 783                 if (unlikely(!tmp_node)) {
 784                         DRM_DEBUG("No free node found\n");
 785                         spin_unlock(&mm->lock);
 786                         break;
 787                 }
 788
 789                 tmp_node = drm_mm_get_block_atomic(tmp_node, pages, align);
 790                 spin_unlock(&mm->lock);
 791         } while (!tmp_node);
 792
 793         if (!tmp_node) {
 794                 DRM_DEBUG("Node allocation failed\n");
 795                 return -ENOMEM;
 796         }
 797
 798         *node = tmp_node;
 799         return 0;
 800 }
 801
 802 static void psb_gtt_mm_free_mem(struct psb_gtt_mm *mm, struct drm_mm_node *node)
 803 {
 804         spin_lock(&mm->lock);
 805         drm_mm_put_block(node);
 806         spin_unlock(&mm->lock);
 807 }
 808
 809 int psb_gtt_map_meminfo(struct drm_device *dev,
 810                         void *hKernelMemInfo,
 811                         uint32_t *offset)
 812 {
 813         return -EINVAL;
 814         /* FIXMEAC */
 815 #if 0
 816         struct drm_psb_private *dev_priv
 817                = (struct drm_psb_private *)dev->dev_private;
 818         void *psKernelMemInfo;
 819         struct psb_gtt_mm *mm = dev_priv->gtt_mm;
 820         struct psb_gtt *pg = dev_priv->pg;
 821         uint32_t size, pages, offset_pages;
 822         void *kmem;
 823         struct drm_mm_node *node;
 824         struct page **page_list;
 825         struct psb_gtt_mem_mapping *mapping = NULL;
 826         int ret;
 827
 828         ret = psb_get_meminfo_by_handle(hKernelMemInfo, &psKernelMemInfo);
 829         if (ret) {
 830                 DRM_DEBUG("Cannot find kernelMemInfo handle %ld\n",
 831                           hKernelMemInfo);
 832                 return -EINVAL;
 833         }
 834
 835         DRM_DEBUG("Got psKernelMemInfo %p for handle %lx\n",
 836                   psKernelMemInfo, (u32)hKernelMemInfo);
 837         size = psKernelMemInfo->ui32AllocSize;
 838         kmem = psKernelMemInfo->pvLinAddrKM;
 839         pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
 840
 841         DRM_DEBUG("KerMemInfo size %ld, cpuVadr %lx, pages %ld, osMemHdl %lx\n",
 842                   size, kmem, pages, psKernelMemInfo->sMemBlk.hOSMemHandle);
 843
 844         if (!kmem)
 845                 DRM_DEBUG("kmem is NULL");
 846
 847         /*get pages*/
 848         ret = psb_get_pages_by_mem_handle(psKernelMemInfo->sMemBlk.hOSMemHandle,
 849                                           &page_list);
 850         if (ret) {
 851                 DRM_DEBUG("get pages error\n");
 852                 return ret;
 853         }
 854
 855         DRM_DEBUG("get %ld pages\n", pages);
 856
 857         /*alloc memory in TT apeture*/
 858         ret = psb_gtt_mm_alloc_mem(mm, pages, 0, &node);
 859         if (ret) {
 860                 DRM_DEBUG("alloc TT memory error\n");
 861                 goto failed_pages_alloc;
 862         }
 863
 864         /*update psb_gtt_mm*/
 865         ret = psb_gtt_add_node(mm,
 866                                task_tgid_nr(current),
 867                                (u32)hKernelMemInfo,
 868                                node,
 869                                &mapping);
 870         if (ret) {
 871                 DRM_DEBUG("add_node failed");
 872                 goto failed_add_node;
 873         }
 874
 875         node = mapping->node;
 876         offset_pages = node->start;
 877
 878         DRM_DEBUG("get free node for %ld pages, offset %ld pages",
 879                   pages, offset_pages);
 880
 881         /*update gtt*/
 882         psb_gtt_insert_pages(pg, page_list,
 883                              (unsigned)offset_pages,
 884                              (unsigned)pages,
 885                              0,
 886                              0,
 887                              0);
 888
 889         *offset = offset_pages;
 890         return 0;
 891
 892 failed_add_node:
 893         psb_gtt_mm_free_mem(mm, node);
 894 failed_pages_alloc:
 895         kfree(page_list);
 896         return ret;
 897 #endif
 898 }
 899
 900 int psb_gtt_unmap_meminfo(struct drm_device *dev, void * hKernelMemInfo)
 901 {
 902         struct drm_psb_private *dev_priv
 903                = (struct drm_psb_private *)dev->dev_private;
 904         struct psb_gtt_mm *mm = dev_priv->gtt_mm;
 905         struct psb_gtt *pg = dev_priv->pg;
 906         uint32_t pages, offset_pages;
 907         struct drm_mm_node *node;
 908         int ret;
 909
 910         ret = psb_gtt_remove_node(mm,
 911                         task_tgid_nr(current),
 912                         (u32)hKernelMemInfo,
 913                         &node);
 914         if (ret) {
 915                 DRM_DEBUG("remove node failed\n");
 916                 return ret;
 917         }
 918
 919         /*remove gtt entries*/
 920         offset_pages = node->start;
 921         pages = node->size;
 922
 923         psb_gtt_remove_pages(pg, offset_pages, pages, 0, 0, 1);
 924
 925
 926         /*free tt node*/
 927
 928         psb_gtt_mm_free_mem(mm, node);
 929         return 0;
 930 }
 931
 932 int psb_gtt_map_meminfo_ioctl(struct drm_device *dev, void *data,
 933                                struct drm_file *file_priv)
 934 {
 935         struct psb_gtt_mapping_arg *arg
 936                = (struct psb_gtt_mapping_arg *)data;
 937         uint32_t *offset_pages = &arg->offset_pages;
 938
 939         DRM_DEBUG("\n");
 940
 941         return psb_gtt_map_meminfo(dev, arg->hKernelMemInfo, offset_pages);
 942 }
 943
 944 int psb_gtt_unmap_meminfo_ioctl(struct drm_device *dev, void *data,
 945                                 struct drm_file *file_priv)
 946 {
 947
 948         struct psb_gtt_mapping_arg *arg
 949                = (struct psb_gtt_mapping_arg *)data;
 950
 951         DRM_DEBUG("\n");
 952
 953         return psb_gtt_unmap_meminfo(dev, arg->hKernelMemInfo);
 954 }
 955
 956 int psb_gtt_map_pvr_memory(struct drm_device *dev,  unsigned int hHandle,
 957                         unsigned int ui32TaskId, dma_addr_t *pPages,
 958                         unsigned int ui32PagesNum, unsigned int *ui32Offset)
 959 {
 960         struct drm_psb_private *dev_priv = dev->dev_private;
 961         struct psb_gtt_mm *mm = dev_priv->gtt_mm;
 962         struct psb_gtt *pg = dev_priv->pg;
 963         uint32_t size, pages, offset_pages;
 964         struct drm_mm_node *node = NULL;
 965         struct psb_gtt_mem_mapping *mapping = NULL;
 966         int ret;
 967
 968         size = ui32PagesNum * PAGE_SIZE;
 969         pages = 0;
 970
 971         /*alloc memory in TT apeture*/
 972         ret = psb_gtt_mm_alloc_mem(mm, ui32PagesNum, 0, &node);
 973         if (ret) {
 974                 DRM_DEBUG("alloc TT memory error\n");
 975                 goto failed_pages_alloc;
 976         }
 977
 978    /*update psb_gtt_mm*/
 979         ret = psb_gtt_add_node(mm,
 980                                                    (u32)ui32TaskId,
 981                                                    (u32)hHandle,
 982                                                    node,
 983                                                    &mapping);
 984         if (ret) {
 985                 DRM_DEBUG("add_node failed");
 986                 goto failed_add_node;
 987         }
 988
 989         node = mapping->node;
 990         offset_pages = node->start;
 991
 992         DRM_DEBUG("get free node for %ld pages, offset %ld pages",
 993                                                         pages, offset_pages);
 994
 995         /*update gtt*/
 996         psb_gtt_insert_phys_addresses(pg, pPages, (unsigned)offset_pages,
 997                                                 (unsigned)ui32PagesNum, 0);
 998
 999         *ui32Offset = offset_pages;
1000         return 0;
1001
1002 failed_add_node:
1003         psb_gtt_mm_free_mem(mm, node);
1004 failed_pages_alloc:
1005         return ret;
1006 }
1007
1008
1009 int psb_gtt_unmap_pvr_memory(struct drm_device *dev, unsigned int hHandle,
1010                                                 unsigned int ui32TaskId)
1011 {
1012         struct drm_psb_private *dev_priv = dev->dev_private;
1013         struct psb_gtt_mm *mm = dev_priv->gtt_mm;
1014         struct psb_gtt *pg = dev_priv->pg;
1015         uint32_t pages, offset_pages;
1016         struct drm_mm_node *node;
1017         int ret;
1018
1019         ret = psb_gtt_remove_node(mm, (u32)ui32TaskId, (u32)hHandle, &node);
1020         if (ret) {
1021                 printk(KERN_ERR "remove node failed\n");
1022                 return ret;
1023         }
1024
1025         /*remove gtt entries*/
1026         offset_pages = node->start;
1027         pages = node->size;
1028
1029         psb_gtt_remove_pages(pg, offset_pages, pages, 0, 0, 1);
1030
1031         /*free tt node*/
1032         psb_gtt_mm_free_mem(mm, node);
1033         return 0;
1034 }