drivers/char/drm/savage_bci.c

   1 /* savage_bci.c -- BCI support for Savage
   2  *
   3  * Copyright 2004  Felix Kuehling
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sub license,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial portions
  15  * of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  20  * NON-INFRINGEMENT. IN NO EVENT SHALL FELIX KUEHLING BE LIABLE FOR
  21  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
  22  * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25 #include "drmP.h"
  26 #include "savage_drm.h"
  27 #include "savage_drv.h"
  28
  29 /* Need a long timeout for shadow status updates can take a while
  30  * and so can waiting for events when the queue is full. */
  31 #define SAVAGE_DEFAULT_USEC_TIMEOUT     1000000 /* 1s */
  32 #define SAVAGE_EVENT_USEC_TIMEOUT       5000000 /* 5s */
  33 #define SAVAGE_FREELIST_DEBUG           0
  34
  35 static int
  36 savage_bci_wait_fifo_shadow(drm_savage_private_t * dev_priv, unsigned int n)
  37 {
  38         uint32_t mask = dev_priv->status_used_mask;
  39         uint32_t threshold = dev_priv->bci_threshold_hi;
  40         uint32_t status;
  41         int i;
  42
  43 #if SAVAGE_BCI_DEBUG
  44         if (n > dev_priv->cob_size + SAVAGE_BCI_FIFO_SIZE - threshold)
  45                 DRM_ERROR("Trying to emit %d words "
  46                           "(more than guaranteed space in COB)\n", n);
  47 #endif
  48
  49         for (i = 0; i < SAVAGE_DEFAULT_USEC_TIMEOUT; i++) {
  50                 DRM_MEMORYBARRIER();
  51                 status = dev_priv->status_ptr[0];
  52                 if ((status & mask) < threshold)
  53                         return 0;
  54                 DRM_UDELAY(1);
  55         }
  56
  57 #if SAVAGE_BCI_DEBUG
  58         DRM_ERROR("failed!\n");
  59         DRM_INFO("   status=0x%08x, threshold=0x%08x\n", status, threshold);
  60 #endif
  61         return DRM_ERR(EBUSY);
  62 }
  63
  64 static int
  65 savage_bci_wait_fifo_s3d(drm_savage_private_t * dev_priv, unsigned int n)
  66 {
  67         uint32_t maxUsed = dev_priv->cob_size + SAVAGE_BCI_FIFO_SIZE - n;
  68         uint32_t status;
  69         int i;
  70
  71         for (i = 0; i < SAVAGE_DEFAULT_USEC_TIMEOUT; i++) {
  72                 status = SAVAGE_READ(SAVAGE_STATUS_WORD0);
  73                 if ((status & SAVAGE_FIFO_USED_MASK_S3D) <= maxUsed)
  74                         return 0;
  75                 DRM_UDELAY(1);
  76         }
  77
  78 #if SAVAGE_BCI_DEBUG
  79         DRM_ERROR("failed!\n");
  80         DRM_INFO("   status=0x%08x\n", status);
  81 #endif
  82         return DRM_ERR(EBUSY);
  83 }
  84
  85 static int
  86 savage_bci_wait_fifo_s4(drm_savage_private_t * dev_priv, unsigned int n)
  87 {
  88         uint32_t maxUsed = dev_priv->cob_size + SAVAGE_BCI_FIFO_SIZE - n;
  89         uint32_t status;
  90         int i;
  91
  92         for (i = 0; i < SAVAGE_DEFAULT_USEC_TIMEOUT; i++) {
  93                 status = SAVAGE_READ(SAVAGE_ALT_STATUS_WORD0);
  94                 if ((status & SAVAGE_FIFO_USED_MASK_S4) <= maxUsed)
  95                         return 0;
  96                 DRM_UDELAY(1);
  97         }
  98
  99 #if SAVAGE_BCI_DEBUG
 100         DRM_ERROR("failed!\n");
 101         DRM_INFO("   status=0x%08x\n", status);
 102 #endif
 103         return DRM_ERR(EBUSY);
 104 }
 105
 106 /*
 107  * Waiting for events.
 108  *
 109  * The BIOSresets the event tag to 0 on mode changes. Therefore we
 110  * never emit 0 to the event tag. If we find a 0 event tag we know the
 111  * BIOS stomped on it and return success assuming that the BIOS waited
 112  * for engine idle.
 113  *
 114  * Note: if the Xserver uses the event tag it has to follow the same
 115  * rule. Otherwise there may be glitches every 2^16 events.
 116  */
 117 static int
 118 savage_bci_wait_event_shadow(drm_savage_private_t * dev_priv, uint16_t e)
 119 {
 120         uint32_t status;
 121         int i;
 122
 123         for (i = 0; i < SAVAGE_EVENT_USEC_TIMEOUT; i++) {
 124                 DRM_MEMORYBARRIER();
 125                 status = dev_priv->status_ptr[1];
 126                 if ((((status & 0xffff) - e) & 0xffff) <= 0x7fff ||
 127                     (status & 0xffff) == 0)
 128                         return 0;
 129                 DRM_UDELAY(1);
 130         }
 131
 132 #if SAVAGE_BCI_DEBUG
 133         DRM_ERROR("failed!\n");
 134         DRM_INFO("   status=0x%08x, e=0x%04x\n", status, e);
 135 #endif
 136
 137         return DRM_ERR(EBUSY);
 138 }
 139
 140 static int
 141 savage_bci_wait_event_reg(drm_savage_private_t * dev_priv, uint16_t e)
 142 {
 143         uint32_t status;
 144         int i;
 145
 146         for (i = 0; i < SAVAGE_EVENT_USEC_TIMEOUT; i++) {
 147                 status = SAVAGE_READ(SAVAGE_STATUS_WORD1);
 148                 if ((((status & 0xffff) - e) & 0xffff) <= 0x7fff ||
 149                     (status & 0xffff) == 0)
 150                         return 0;
 151                 DRM_UDELAY(1);
 152         }
 153
 154 #if SAVAGE_BCI_DEBUG
 155         DRM_ERROR("failed!\n");
 156         DRM_INFO("   status=0x%08x, e=0x%04x\n", status, e);
 157 #endif
 158
 159         return DRM_ERR(EBUSY);
 160 }
 161
 162 uint16_t savage_bci_emit_event(drm_savage_private_t * dev_priv,
 163                                unsigned int flags)
 164 {
 165         uint16_t count;
 166         BCI_LOCALS;
 167
 168         if (dev_priv->status_ptr) {
 169                 /* coordinate with Xserver */
 170                 count = dev_priv->status_ptr[1023];
 171                 if (count < dev_priv->event_counter)
 172                         dev_priv->event_wrap++;
 173         } else {
 174                 count = dev_priv->event_counter;
 175         }
 176         count = (count + 1) & 0xffff;
 177         if (count == 0) {
 178                 count++;        /* See the comment above savage_wait_event_*. */
 179                 dev_priv->event_wrap++;
 180         }
 181         dev_priv->event_counter = count;
 182         if (dev_priv->status_ptr)
 183                 dev_priv->status_ptr[1023] = (uint32_t) count;
 184
 185         if ((flags & (SAVAGE_WAIT_2D | SAVAGE_WAIT_3D))) {
 186                 unsigned int wait_cmd = BCI_CMD_WAIT;
 187                 if ((flags & SAVAGE_WAIT_2D))
 188                         wait_cmd |= BCI_CMD_WAIT_2D;
 189                 if ((flags & SAVAGE_WAIT_3D))
 190                         wait_cmd |= BCI_CMD_WAIT_3D;
 191                 BEGIN_BCI(2);
 192                 BCI_WRITE(wait_cmd);
 193         } else {
 194                 BEGIN_BCI(1);
 195         }
 196         BCI_WRITE(BCI_CMD_UPDATE_EVENT_TAG | (uint32_t) count);
 197
 198         return count;
 199 }
 200
 201 /*
 202  * Freelist management
 203  */
 204 static int savage_freelist_init(drm_device_t * dev)
 205 {
 206         drm_savage_private_t *dev_priv = dev->dev_private;
 207         drm_device_dma_t *dma = dev->dma;
 208         drm_buf_t *buf;
 209         drm_savage_buf_priv_t *entry;
 210         int i;
 211         DRM_DEBUG("count=%d\n", dma->buf_count);
 212
 213         dev_priv->head.next = &dev_priv->tail;
 214         dev_priv->head.prev = NULL;
 215         dev_priv->head.buf = NULL;
 216
 217         dev_priv->tail.next = NULL;
 218         dev_priv->tail.prev = &dev_priv->head;
 219         dev_priv->tail.buf = NULL;
 220
 221         for (i = 0; i < dma->buf_count; i++) {
 222                 buf = dma->buflist[i];
 223                 entry = buf->dev_private;
 224
 225                 SET_AGE(&entry->age, 0, 0);
 226                 entry->buf = buf;
 227
 228                 entry->next = dev_priv->head.next;
 229                 entry->prev = &dev_priv->head;
 230                 dev_priv->head.next->prev = entry;
 231                 dev_priv->head.next = entry;
 232         }
 233
 234         return 0;
 235 }
 236
 237 static drm_buf_t *savage_freelist_get(drm_device_t * dev)
 238 {
 239         drm_savage_private_t *dev_priv = dev->dev_private;
 240         drm_savage_buf_priv_t *tail = dev_priv->tail.prev;
 241         uint16_t event;
 242         unsigned int wrap;
 243         DRM_DEBUG("\n");
 244
 245         UPDATE_EVENT_COUNTER();
 246         if (dev_priv->status_ptr)
 247                 event = dev_priv->status_ptr[1] & 0xffff;
 248         else
 249                 event = SAVAGE_READ(SAVAGE_STATUS_WORD1) & 0xffff;
 250         wrap = dev_priv->event_wrap;
 251         if (event > dev_priv->event_counter)
 252                 wrap--;         /* hardware hasn't passed the last wrap yet */
 253
 254         DRM_DEBUG("   tail=0x%04x %d\n", tail->age.event, tail->age.wrap);
 255         DRM_DEBUG("   head=0x%04x %d\n", event, wrap);
 256
 257         if (tail->buf && (TEST_AGE(&tail->age, event, wrap) || event == 0)) {
 258                 drm_savage_buf_priv_t *next = tail->next;
 259                 drm_savage_buf_priv_t *prev = tail->prev;
 260                 prev->next = next;
 261                 next->prev = prev;
 262                 tail->next = tail->prev = NULL;
 263                 return tail->buf;
 264         }
 265
 266         DRM_DEBUG("returning NULL, tail->buf=%p!\n", tail->buf);
 267         return NULL;
 268 }
 269
 270 void savage_freelist_put(drm_device_t * dev, drm_buf_t * buf)
 271 {
 272         drm_savage_private_t *dev_priv = dev->dev_private;
 273         drm_savage_buf_priv_t *entry = buf->dev_private, *prev, *next;
 274
 275         DRM_DEBUG("age=0x%04x wrap=%d\n", entry->age.event, entry->age.wrap);
 276
 277         if (entry->next != NULL || entry->prev != NULL) {
 278                 DRM_ERROR("entry already on freelist.\n");
 279                 return;
 280         }
 281
 282         prev = &dev_priv->head;
 283         next = prev->next;
 284         prev->next = entry;
 285         next->prev = entry;
 286         entry->prev = prev;
 287         entry->next = next;
 288 }
 289
 290 /*
 291  * Command DMA
 292  */
 293 static int savage_dma_init(drm_savage_private_t * dev_priv)
 294 {
 295         unsigned int i;
 296
 297         dev_priv->nr_dma_pages = dev_priv->cmd_dma->size /
 298             (SAVAGE_DMA_PAGE_SIZE * 4);
 299         dev_priv->dma_pages = drm_alloc(sizeof(drm_savage_dma_page_t) *
 300                                         dev_priv->nr_dma_pages, DRM_MEM_DRIVER);
 301         if (dev_priv->dma_pages == NULL)
 302                 return DRM_ERR(ENOMEM);
 303
 304         for (i = 0; i < dev_priv->nr_dma_pages; ++i) {
 305                 SET_AGE(&dev_priv->dma_pages[i].age, 0, 0);
 306                 dev_priv->dma_pages[i].used = 0;
 307                 dev_priv->dma_pages[i].flushed = 0;
 308         }
 309         SET_AGE(&dev_priv->last_dma_age, 0, 0);
 310
 311         dev_priv->first_dma_page = 0;
 312         dev_priv->current_dma_page = 0;
 313
 314         return 0;
 315 }
 316
 317 void savage_dma_reset(drm_savage_private_t * dev_priv)
 318 {
 319         uint16_t event;
 320         unsigned int wrap, i;
 321         event = savage_bci_emit_event(dev_priv, 0);
 322         wrap = dev_priv->event_wrap;
 323         for (i = 0; i < dev_priv->nr_dma_pages; ++i) {
 324                 SET_AGE(&dev_priv->dma_pages[i].age, event, wrap);
 325                 dev_priv->dma_pages[i].used = 0;
 326                 dev_priv->dma_pages[i].flushed = 0;
 327         }
 328         SET_AGE(&dev_priv->last_dma_age, event, wrap);
 329         dev_priv->first_dma_page = dev_priv->current_dma_page = 0;
 330 }
 331
 332 void savage_dma_wait(drm_savage_private_t * dev_priv, unsigned int page)
 333 {
 334         uint16_t event;
 335         unsigned int wrap;
 336
 337         /* Faked DMA buffer pages don't age. */
 338         if (dev_priv->cmd_dma == &dev_priv->fake_dma)
 339                 return;
 340
 341         UPDATE_EVENT_COUNTER();
 342         if (dev_priv->status_ptr)
 343                 event = dev_priv->status_ptr[1] & 0xffff;
 344         else
 345                 event = SAVAGE_READ(SAVAGE_STATUS_WORD1) & 0xffff;
 346         wrap = dev_priv->event_wrap;
 347         if (event > dev_priv->event_counter)
 348                 wrap--;         /* hardware hasn't passed the last wrap yet */
 349
 350         if (dev_priv->dma_pages[page].age.wrap > wrap ||
 351             (dev_priv->dma_pages[page].age.wrap == wrap &&
 352              dev_priv->dma_pages[page].age.event > event)) {
 353                 if (dev_priv->wait_evnt(dev_priv,
 354                                         dev_priv->dma_pages[page].age.event)
 355                     < 0)
 356                         DRM_ERROR("wait_evnt failed!\n");
 357         }
 358 }
 359
 360 uint32_t *savage_dma_alloc(drm_savage_private_t * dev_priv, unsigned int n)
 361 {
 362         unsigned int cur = dev_priv->current_dma_page;
 363         unsigned int rest = SAVAGE_DMA_PAGE_SIZE -
 364             dev_priv->dma_pages[cur].used;
 365         unsigned int nr_pages = (n - rest + SAVAGE_DMA_PAGE_SIZE - 1) /
 366             SAVAGE_DMA_PAGE_SIZE;
 367         uint32_t *dma_ptr;
 368         unsigned int i;
 369
 370         DRM_DEBUG("cur=%u, cur->used=%u, n=%u, rest=%u, nr_pages=%u\n",
 371                   cur, dev_priv->dma_pages[cur].used, n, rest, nr_pages);
 372
 373         if (cur + nr_pages < dev_priv->nr_dma_pages) {
 374                 dma_ptr = (uint32_t *) dev_priv->cmd_dma->handle +
 375                     cur * SAVAGE_DMA_PAGE_SIZE + dev_priv->dma_pages[cur].used;
 376                 if (n < rest)
 377                         rest = n;
 378                 dev_priv->dma_pages[cur].used += rest;
 379                 n -= rest;
 380                 cur++;
 381         } else {
 382                 dev_priv->dma_flush(dev_priv);
 383                 nr_pages =
 384                     (n + SAVAGE_DMA_PAGE_SIZE - 1) / SAVAGE_DMA_PAGE_SIZE;
 385                 for (i = cur; i < dev_priv->nr_dma_pages; ++i) {
 386                         dev_priv->dma_pages[i].age = dev_priv->last_dma_age;
 387                         dev_priv->dma_pages[i].used = 0;
 388                         dev_priv->dma_pages[i].flushed = 0;
 389                 }
 390                 dma_ptr = (uint32_t *) dev_priv->cmd_dma->handle;
 391                 dev_priv->first_dma_page = cur = 0;
 392         }
 393         for (i = cur; nr_pages > 0; ++i, --nr_pages) {
 394 #if SAVAGE_DMA_DEBUG
 395                 if (dev_priv->dma_pages[i].used) {
 396                         DRM_ERROR("unflushed page %u: used=%u\n",
 397                                   i, dev_priv->dma_pages[i].used);
 398                 }
 399 #endif
 400                 if (n > SAVAGE_DMA_PAGE_SIZE)
 401                         dev_priv->dma_pages[i].used = SAVAGE_DMA_PAGE_SIZE;
 402                 else
 403                         dev_priv->dma_pages[i].used = n;
 404                 n -= SAVAGE_DMA_PAGE_SIZE;
 405         }
 406         dev_priv->current_dma_page = --i;
 407
 408         DRM_DEBUG("cur=%u, cur->used=%u, n=%u\n",
 409                   i, dev_priv->dma_pages[i].used, n);
 410
 411         savage_dma_wait(dev_priv, dev_priv->current_dma_page);
 412
 413         return dma_ptr;
 414 }
 415
 416 static void savage_dma_flush(drm_savage_private_t * dev_priv)
 417 {
 418         unsigned int first = dev_priv->first_dma_page;
 419         unsigned int cur = dev_priv->current_dma_page;
 420         uint16_t event;
 421         unsigned int wrap, pad, align, len, i;
 422         unsigned long phys_addr;
 423         BCI_LOCALS;
 424
 425         if (first == cur &&
 426             dev_priv->dma_pages[cur].used == dev_priv->dma_pages[cur].flushed)
 427                 return;
 428
 429         /* pad length to multiples of 2 entries
 430          * align start of next DMA block to multiles of 8 entries */
 431         pad = -dev_priv->dma_pages[cur].used & 1;
 432         align = -(dev_priv->dma_pages[cur].used + pad) & 7;
 433
 434         DRM_DEBUG("first=%u, cur=%u, first->flushed=%u, cur->used=%u, "
 435                   "pad=%u, align=%u\n",
 436                   first, cur, dev_priv->dma_pages[first].flushed,
 437                   dev_priv->dma_pages[cur].used, pad, align);
 438
 439         /* pad with noops */
 440         if (pad) {
 441                 uint32_t *dma_ptr = (uint32_t *) dev_priv->cmd_dma->handle +
 442                     cur * SAVAGE_DMA_PAGE_SIZE + dev_priv->dma_pages[cur].used;
 443                 dev_priv->dma_pages[cur].used += pad;
 444                 while (pad != 0) {
 445                         *dma_ptr++ = BCI_CMD_WAIT;
 446                         pad--;
 447                 }
 448         }
 449
 450         DRM_MEMORYBARRIER();
 451
 452         /* do flush ... */
 453         phys_addr = dev_priv->cmd_dma->offset +
 454             (first * SAVAGE_DMA_PAGE_SIZE +
 455              dev_priv->dma_pages[first].flushed) * 4;
 456         len = (cur - first) * SAVAGE_DMA_PAGE_SIZE +
 457             dev_priv->dma_pages[cur].used - dev_priv->dma_pages[first].flushed;
 458
 459         DRM_DEBUG("phys_addr=%lx, len=%u\n",
 460                   phys_addr | dev_priv->dma_type, len);
 461
 462         BEGIN_BCI(3);
 463         BCI_SET_REGISTERS(SAVAGE_DMABUFADDR, 1);
 464         BCI_WRITE(phys_addr | dev_priv->dma_type);
 465         BCI_DMA(len);
 466
 467         /* fix alignment of the start of the next block */
 468         dev_priv->dma_pages[cur].used += align;
 469
 470         /* age DMA pages */
 471         event = savage_bci_emit_event(dev_priv, 0);
 472         wrap = dev_priv->event_wrap;
 473         for (i = first; i < cur; ++i) {
 474                 SET_AGE(&dev_priv->dma_pages[i].age, event, wrap);
 475                 dev_priv->dma_pages[i].used = 0;
 476                 dev_priv->dma_pages[i].flushed = 0;
 477         }
 478         /* age the current page only when it's full */
 479         if (dev_priv->dma_pages[cur].used == SAVAGE_DMA_PAGE_SIZE) {
 480                 SET_AGE(&dev_priv->dma_pages[cur].age, event, wrap);
 481                 dev_priv->dma_pages[cur].used = 0;
 482                 dev_priv->dma_pages[cur].flushed = 0;
 483                 /* advance to next page */
 484                 cur++;
 485                 if (cur == dev_priv->nr_dma_pages)
 486                         cur = 0;
 487                 dev_priv->first_dma_page = dev_priv->current_dma_page = cur;
 488         } else {
 489                 dev_priv->first_dma_page = cur;
 490                 dev_priv->dma_pages[cur].flushed = dev_priv->dma_pages[i].used;
 491         }
 492         SET_AGE(&dev_priv->last_dma_age, event, wrap);
 493
 494         DRM_DEBUG("first=cur=%u, cur->used=%u, cur->flushed=%u\n", cur,
 495                   dev_priv->dma_pages[cur].used,
 496                   dev_priv->dma_pages[cur].flushed);
 497 }
 498
 499 static void savage_fake_dma_flush(drm_savage_private_t * dev_priv)
 500 {
 501         unsigned int i, j;
 502         BCI_LOCALS;
 503
 504         if (dev_priv->first_dma_page == dev_priv->current_dma_page &&
 505             dev_priv->dma_pages[dev_priv->current_dma_page].used == 0)
 506                 return;
 507
 508         DRM_DEBUG("first=%u, cur=%u, cur->used=%u\n",
 509                   dev_priv->first_dma_page, dev_priv->current_dma_page,
 510                   dev_priv->dma_pages[dev_priv->current_dma_page].used);
 511
 512         for (i = dev_priv->first_dma_page;
 513              i <= dev_priv->current_dma_page && dev_priv->dma_pages[i].used;
 514              ++i) {
 515                 uint32_t *dma_ptr = (uint32_t *) dev_priv->cmd_dma->handle +
 516                     i * SAVAGE_DMA_PAGE_SIZE;
 517 #if SAVAGE_DMA_DEBUG
 518                 /* Sanity check: all pages except the last one must be full. */
 519                 if (i < dev_priv->current_dma_page &&
 520                     dev_priv->dma_pages[i].used != SAVAGE_DMA_PAGE_SIZE) {
 521                         DRM_ERROR("partial DMA page %u: used=%u",
 522                                   i, dev_priv->dma_pages[i].used);
 523                 }
 524 #endif
 525                 BEGIN_BCI(dev_priv->dma_pages[i].used);
 526                 for (j = 0; j < dev_priv->dma_pages[i].used; ++j) {
 527                         BCI_WRITE(dma_ptr[j]);
 528                 }
 529                 dev_priv->dma_pages[i].used = 0;
 530         }
 531
 532         /* reset to first page */
 533         dev_priv->first_dma_page = dev_priv->current_dma_page = 0;
 534 }
 535
 536 int savage_driver_load(drm_device_t *dev, unsigned long chipset)
 537 {
 538         drm_savage_private_t *dev_priv;
 539
 540         dev_priv = drm_alloc(sizeof(drm_savage_private_t), DRM_MEM_DRIVER);
 541         if (dev_priv == NULL)
 542                 return DRM_ERR(ENOMEM);
 543
 544         memset(dev_priv, 0, sizeof(drm_savage_private_t));
 545         dev->dev_private = (void *)dev_priv;
 546
 547         dev_priv->chipset = (enum savage_family)chipset;
 548
 549         return 0;
 550 }
 551
 552
 553 /*
 554  * Initalize mappings. On Savage4 and SavageIX the alignment
 555  * and size of the aperture is not suitable for automatic MTRR setup
 556  * in drm_addmap. Therefore we add them manually before the maps are
 557  * initialized, and tear them down on last close.
 558  */
 559 int savage_driver_firstopen(drm_device_t *dev)
 560 {
 561         drm_savage_private_t *dev_priv = dev->dev_private;
 562         unsigned long mmio_base, fb_base, fb_size, aperture_base;
 563         /* fb_rsrc and aper_rsrc aren't really used currently, but still exist
 564          * in case we decide we need information on the BAR for BSD in the
 565          * future.
 566          */
 567         unsigned int fb_rsrc, aper_rsrc;
 568         int ret = 0;
 569
 570         dev_priv->mtrr[0].handle = -1;
 571         dev_priv->mtrr[1].handle = -1;
 572         dev_priv->mtrr[2].handle = -1;
 573         if (S3_SAVAGE3D_SERIES(dev_priv->chipset)) {
 574                 fb_rsrc = 0;
 575                 fb_base = drm_get_resource_start(dev, 0);
 576                 fb_size = SAVAGE_FB_SIZE_S3;
 577                 mmio_base = fb_base + SAVAGE_FB_SIZE_S3;
 578                 aper_rsrc = 0;
 579                 aperture_base = fb_base + SAVAGE_APERTURE_OFFSET;
 580                 /* this should always be true */
 581                 if (drm_get_resource_len(dev, 0) == 0x08000000) {
 582                         /* Don't make MMIO write-cobining! We need 3
 583                          * MTRRs. */
 584                         dev_priv->mtrr[0].base = fb_base;
 585                         dev_priv->mtrr[0].size = 0x01000000;
 586                         dev_priv->mtrr[0].handle =
 587                             mtrr_add(dev_priv->mtrr[0].base,
 588                                      dev_priv->mtrr[0].size, MTRR_TYPE_WRCOMB,
 589                                      1);
 590                         dev_priv->mtrr[1].base = fb_base + 0x02000000;
 591                         dev_priv->mtrr[1].size = 0x02000000;
 592                         dev_priv->mtrr[1].handle =
 593                             mtrr_add(dev_priv->mtrr[1].base,
 594                                      dev_priv->mtrr[1].size, MTRR_TYPE_WRCOMB,
 595                                      1);
 596                         dev_priv->mtrr[2].base = fb_base + 0x04000000;
 597                         dev_priv->mtrr[2].size = 0x04000000;
 598                         dev_priv->mtrr[2].handle =
 599                             mtrr_add(dev_priv->mtrr[2].base,
 600                                      dev_priv->mtrr[2].size, MTRR_TYPE_WRCOMB,
 601                                      1);
 602                 } else {
 603                         DRM_ERROR("strange pci_resource_len %08lx\n",
 604                                   drm_get_resource_len(dev, 0));
 605                 }
 606         } else if (dev_priv->chipset != S3_SUPERSAVAGE &&
 607                    dev_priv->chipset != S3_SAVAGE2000) {
 608                 mmio_base = drm_get_resource_start(dev, 0);
 609                 fb_rsrc = 1;
 610                 fb_base = drm_get_resource_start(dev, 1);
 611                 fb_size = SAVAGE_FB_SIZE_S4;
 612                 aper_rsrc = 1;
 613                 aperture_base = fb_base + SAVAGE_APERTURE_OFFSET;
 614                 /* this should always be true */
 615                 if (drm_get_resource_len(dev, 1) == 0x08000000) {
 616                         /* Can use one MTRR to cover both fb and
 617                          * aperture. */
 618                         dev_priv->mtrr[0].base = fb_base;
 619                         dev_priv->mtrr[0].size = 0x08000000;
 620                         dev_priv->mtrr[0].handle =
 621                             mtrr_add(dev_priv->mtrr[0].base,
 622                                      dev_priv->mtrr[0].size, MTRR_TYPE_WRCOMB,
 623                                      1);
 624                 } else {
 625                         DRM_ERROR("strange pci_resource_len %08lx\n",
 626                                   drm_get_resource_len(dev, 1));
 627                 }
 628         } else {
 629                 mmio_base = drm_get_resource_start(dev, 0);
 630                 fb_rsrc = 1;
 631                 fb_base = drm_get_resource_start(dev, 1);
 632                 fb_size = drm_get_resource_len(dev, 1);
 633                 aper_rsrc = 2;
 634                 aperture_base = drm_get_resource_start(dev, 2);
 635                 /* Automatic MTRR setup will do the right thing. */
 636         }
 637
 638         ret = drm_addmap(dev, mmio_base, SAVAGE_MMIO_SIZE, _DRM_REGISTERS,
 639                          _DRM_READ_ONLY, &dev_priv->mmio);
 640         if (ret)
 641                 return ret;
 642
 643         ret = drm_addmap(dev, fb_base, fb_size, _DRM_FRAME_BUFFER,
 644                          _DRM_WRITE_COMBINING, &dev_priv->fb);
 645         if (ret)
 646                 return ret;
 647
 648         ret = drm_addmap(dev, aperture_base, SAVAGE_APERTURE_SIZE,
 649                          _DRM_FRAME_BUFFER, _DRM_WRITE_COMBINING,
 650                          &dev_priv->aperture);
 651         if (ret)
 652                 return ret;
 653
 654         return ret;
 655 }
 656
 657 /*
 658  * Delete MTRRs and free device-private data.
 659  */
 660 void savage_driver_lastclose(drm_device_t *dev)
 661 {
 662         drm_savage_private_t *dev_priv = dev->dev_private;
 663         int i;
 664
 665         for (i = 0; i < 3; ++i)
 666                 if (dev_priv->mtrr[i].handle >= 0)
 667                         mtrr_del(dev_priv->mtrr[i].handle,
 668                                  dev_priv->mtrr[i].base,
 669                                  dev_priv->mtrr[i].size);
 670 }
 671
 672 int savage_driver_unload(drm_device_t *dev)
 673 {
 674         drm_savage_private_t *dev_priv = dev->dev_private;
 675
 676         drm_free(dev_priv, sizeof(drm_savage_private_t), DRM_MEM_DRIVER);
 677
 678         return 0;
 679 }
 680
 681 static int savage_do_init_bci(drm_device_t * dev, drm_savage_init_t * init)
 682 {
 683         drm_savage_private_t *dev_priv = dev->dev_private;
 684
 685         if (init->fb_bpp != 16 && init->fb_bpp != 32) {
 686                 DRM_ERROR("invalid frame buffer bpp %d!\n", init->fb_bpp);
 687                 return DRM_ERR(EINVAL);
 688         }
 689         if (init->depth_bpp != 16 && init->depth_bpp != 32) {
 690                 DRM_ERROR("invalid depth buffer bpp %d!\n", init->fb_bpp);
 691                 return DRM_ERR(EINVAL);
 692         }
 693         if (init->dma_type != SAVAGE_DMA_AGP &&
 694             init->dma_type != SAVAGE_DMA_PCI) {
 695                 DRM_ERROR("invalid dma memory type %d!\n", init->dma_type);
 696                 return DRM_ERR(EINVAL);
 697         }
 698
 699         dev_priv->cob_size = init->cob_size;
 700         dev_priv->bci_threshold_lo = init->bci_threshold_lo;
 701         dev_priv->bci_threshold_hi = init->bci_threshold_hi;
 702         dev_priv->dma_type = init->dma_type;
 703
 704         dev_priv->fb_bpp = init->fb_bpp;
 705         dev_priv->front_offset = init->front_offset;
 706         dev_priv->front_pitch = init->front_pitch;
 707         dev_priv->back_offset = init->back_offset;
 708         dev_priv->back_pitch = init->back_pitch;
 709         dev_priv->depth_bpp = init->depth_bpp;
 710         dev_priv->depth_offset = init->depth_offset;
 711         dev_priv->depth_pitch = init->depth_pitch;
 712
 713         dev_priv->texture_offset = init->texture_offset;
 714         dev_priv->texture_size = init->texture_size;
 715
 716         DRM_GETSAREA();
 717         if (!dev_priv->sarea) {
 718                 DRM_ERROR("could not find sarea!\n");
 719                 savage_do_cleanup_bci(dev);
 720                 return DRM_ERR(EINVAL);
 721         }
 722         if (init->status_offset != 0) {
 723                 dev_priv->status = drm_core_findmap(dev, init->status_offset);
 724                 if (!dev_priv->status) {
 725                         DRM_ERROR("could not find shadow status region!\n");
 726                         savage_do_cleanup_bci(dev);
 727                         return DRM_ERR(EINVAL);
 728                 }
 729         } else {
 730                 dev_priv->status = NULL;
 731         }
 732         if (dev_priv->dma_type == SAVAGE_DMA_AGP && init->buffers_offset) {
 733                 dev->agp_buffer_map = drm_core_findmap(dev,
 734                                                        init->buffers_offset);
 735                 if (!dev->agp_buffer_map) {
 736                         DRM_ERROR("could not find DMA buffer region!\n");
 737                         savage_do_cleanup_bci(dev);
 738                         return DRM_ERR(EINVAL);
 739                 }
 740                 drm_core_ioremap(dev->agp_buffer_map, dev);
 741                 if (!dev->agp_buffer_map) {
 742                         DRM_ERROR("failed to ioremap DMA buffer region!\n");
 743                         savage_do_cleanup_bci(dev);
 744                         return DRM_ERR(ENOMEM);
 745                 }
 746         }
 747         if (init->agp_textures_offset) {
 748                 dev_priv->agp_textures =
 749                     drm_core_findmap(dev, init->agp_textures_offset);
 750                 if (!dev_priv->agp_textures) {
 751                         DRM_ERROR("could not find agp texture region!\n");
 752                         savage_do_cleanup_bci(dev);
 753                         return DRM_ERR(EINVAL);
 754                 }
 755         } else {
 756                 dev_priv->agp_textures = NULL;
 757         }
 758
 759         if (init->cmd_dma_offset) {
 760                 if (S3_SAVAGE3D_SERIES(dev_priv->chipset)) {
 761                         DRM_ERROR("command DMA not supported on "
 762                                   "Savage3D/MX/IX.\n");
 763                         savage_do_cleanup_bci(dev);
 764                         return DRM_ERR(EINVAL);
 765                 }
 766                 if (dev->dma && dev->dma->buflist) {
 767                         DRM_ERROR("command and vertex DMA not supported "
 768                                   "at the same time.\n");
 769                         savage_do_cleanup_bci(dev);
 770                         return DRM_ERR(EINVAL);
 771                 }
 772                 dev_priv->cmd_dma = drm_core_findmap(dev, init->cmd_dma_offset);
 773                 if (!dev_priv->cmd_dma) {
 774                         DRM_ERROR("could not find command DMA region!\n");
 775                         savage_do_cleanup_bci(dev);
 776                         return DRM_ERR(EINVAL);
 777                 }
 778                 if (dev_priv->dma_type == SAVAGE_DMA_AGP) {
 779                         if (dev_priv->cmd_dma->type != _DRM_AGP) {
 780                                 DRM_ERROR("AGP command DMA region is not a "
 781                                           "_DRM_AGP map!\n");
 782                                 savage_do_cleanup_bci(dev);
 783                                 return DRM_ERR(EINVAL);
 784                         }
 785                         drm_core_ioremap(dev_priv->cmd_dma, dev);
 786                         if (!dev_priv->cmd_dma->handle) {
 787                                 DRM_ERROR("failed to ioremap command "
 788                                           "DMA region!\n");
 789                                 savage_do_cleanup_bci(dev);
 790                                 return DRM_ERR(ENOMEM);
 791                         }
 792                 } else if (dev_priv->cmd_dma->type != _DRM_CONSISTENT) {
 793                         DRM_ERROR("PCI command DMA region is not a "
 794                                   "_DRM_CONSISTENT map!\n");
 795                         savage_do_cleanup_bci(dev);
 796                         return DRM_ERR(EINVAL);
 797                 }
 798         } else {
 799                 dev_priv->cmd_dma = NULL;
 800         }
 801
 802         dev_priv->dma_flush = savage_dma_flush;
 803         if (!dev_priv->cmd_dma) {
 804                 DRM_DEBUG("falling back to faked command DMA.\n");
 805                 dev_priv->fake_dma.offset = 0;
 806                 dev_priv->fake_dma.size = SAVAGE_FAKE_DMA_SIZE;
 807                 dev_priv->fake_dma.type = _DRM_SHM;
 808                 dev_priv->fake_dma.handle = drm_alloc(SAVAGE_FAKE_DMA_SIZE,
 809                                                       DRM_MEM_DRIVER);
 810                 if (!dev_priv->fake_dma.handle) {
 811                         DRM_ERROR("could not allocate faked DMA buffer!\n");
 812                         savage_do_cleanup_bci(dev);
 813                         return DRM_ERR(ENOMEM);
 814                 }
 815                 dev_priv->cmd_dma = &dev_priv->fake_dma;
 816                 dev_priv->dma_flush = savage_fake_dma_flush;
 817         }
 818
 819         dev_priv->sarea_priv =
 820             (drm_savage_sarea_t *) ((uint8_t *) dev_priv->sarea->handle +
 821                                     init->sarea_priv_offset);
 822
 823         /* setup bitmap descriptors */
 824         {
 825                 unsigned int color_tile_format;
 826                 unsigned int depth_tile_format;
 827                 unsigned int front_stride, back_stride, depth_stride;
 828                 if (dev_priv->chipset <= S3_SAVAGE4) {
 829                         color_tile_format = dev_priv->fb_bpp == 16 ?
 830                             SAVAGE_BD_TILE_16BPP : SAVAGE_BD_TILE_32BPP;
 831                         depth_tile_format = dev_priv->depth_bpp == 16 ?
 832                             SAVAGE_BD_TILE_16BPP : SAVAGE_BD_TILE_32BPP;
 833                 } else {
 834                         color_tile_format = SAVAGE_BD_TILE_DEST;
 835                         depth_tile_format = SAVAGE_BD_TILE_DEST;
 836                 }
 837                 front_stride = dev_priv->front_pitch / (dev_priv->fb_bpp / 8);
 838                 back_stride = dev_priv->back_pitch / (dev_priv->fb_bpp / 8);
 839                 depth_stride =
 840                     dev_priv->depth_pitch / (dev_priv->depth_bpp / 8);
 841
 842                 dev_priv->front_bd = front_stride | SAVAGE_BD_BW_DISABLE |
 843                     (dev_priv->fb_bpp << SAVAGE_BD_BPP_SHIFT) |
 844                     (color_tile_format << SAVAGE_BD_TILE_SHIFT);
 845
 846                 dev_priv->back_bd = back_stride | SAVAGE_BD_BW_DISABLE |
 847                     (dev_priv->fb_bpp << SAVAGE_BD_BPP_SHIFT) |
 848                     (color_tile_format << SAVAGE_BD_TILE_SHIFT);
 849
 850                 dev_priv->depth_bd = depth_stride | SAVAGE_BD_BW_DISABLE |
 851                     (dev_priv->depth_bpp << SAVAGE_BD_BPP_SHIFT) |
 852                     (depth_tile_format << SAVAGE_BD_TILE_SHIFT);
 853         }
 854
 855         /* setup status and bci ptr */
 856         dev_priv->event_counter = 0;
 857         dev_priv->event_wrap = 0;
 858         dev_priv->bci_ptr = (volatile uint32_t *)
 859             ((uint8_t *) dev_priv->mmio->handle + SAVAGE_BCI_OFFSET);
 860         if (S3_SAVAGE3D_SERIES(dev_priv->chipset)) {
 861                 dev_priv->status_used_mask = SAVAGE_FIFO_USED_MASK_S3D;
 862         } else {
 863                 dev_priv->status_used_mask = SAVAGE_FIFO_USED_MASK_S4;
 864         }
 865         if (dev_priv->status != NULL) {
 866                 dev_priv->status_ptr =
 867                     (volatile uint32_t *)dev_priv->status->handle;
 868                 dev_priv->wait_fifo = savage_bci_wait_fifo_shadow;
 869                 dev_priv->wait_evnt = savage_bci_wait_event_shadow;
 870                 dev_priv->status_ptr[1023] = dev_priv->event_counter;
 871         } else {
 872                 dev_priv->status_ptr = NULL;
 873                 if (S3_SAVAGE3D_SERIES(dev_priv->chipset)) {
 874                         dev_priv->wait_fifo = savage_bci_wait_fifo_s3d;
 875                 } else {
 876                         dev_priv->wait_fifo = savage_bci_wait_fifo_s4;
 877                 }
 878                 dev_priv->wait_evnt = savage_bci_wait_event_reg;
 879         }
 880
 881         /* cliprect functions */
 882         if (S3_SAVAGE3D_SERIES(dev_priv->chipset))
 883                 dev_priv->emit_clip_rect = savage_emit_clip_rect_s3d;
 884         else
 885                 dev_priv->emit_clip_rect = savage_emit_clip_rect_s4;
 886
 887         if (savage_freelist_init(dev) < 0) {
 888                 DRM_ERROR("could not initialize freelist\n");
 889                 savage_do_cleanup_bci(dev);
 890                 return DRM_ERR(ENOMEM);
 891         }
 892
 893         if (savage_dma_init(dev_priv) < 0) {
 894                 DRM_ERROR("could not initialize command DMA\n");
 895                 savage_do_cleanup_bci(dev);
 896                 return DRM_ERR(ENOMEM);
 897         }
 898
 899         return 0;
 900 }
 901
 902 int savage_do_cleanup_bci(drm_device_t * dev)
 903 {
 904         drm_savage_private_t *dev_priv = dev->dev_private;
 905
 906         if (dev_priv->cmd_dma == &dev_priv->fake_dma) {
 907                 if (dev_priv->fake_dma.handle)
 908                         drm_free(dev_priv->fake_dma.handle,
 909                                  SAVAGE_FAKE_DMA_SIZE, DRM_MEM_DRIVER);
 910         } else if (dev_priv->cmd_dma && dev_priv->cmd_dma->handle &&
 911                    dev_priv->cmd_dma->type == _DRM_AGP &&
 912                    dev_priv->dma_type == SAVAGE_DMA_AGP)
 913                 drm_core_ioremapfree(dev_priv->cmd_dma, dev);
 914
 915         if (dev_priv->dma_type == SAVAGE_DMA_AGP &&
 916             dev->agp_buffer_map && dev->agp_buffer_map->handle) {
 917                 drm_core_ioremapfree(dev->agp_buffer_map, dev);
 918                 /* make sure the next instance (which may be running
 919                  * in PCI mode) doesn't try to use an old
 920                  * agp_buffer_map. */
 921                 dev->agp_buffer_map = NULL;
 922         }
 923
 924         if (dev_priv->dma_pages)
 925                 drm_free(dev_priv->dma_pages,
 926                          sizeof(drm_savage_dma_page_t) * dev_priv->nr_dma_pages,
 927                          DRM_MEM_DRIVER);
 928
 929         return 0;
 930 }
 931
 932 static int savage_bci_init(DRM_IOCTL_ARGS)
 933 {
 934         DRM_DEVICE;
 935         drm_savage_init_t init;
 936
 937         LOCK_TEST_WITH_RETURN(dev, filp);
 938
 939         DRM_COPY_FROM_USER_IOCTL(init, (drm_savage_init_t __user *) data,
 940                                  sizeof(init));
 941
 942         switch (init.func) {
 943         case SAVAGE_INIT_BCI:
 944                 return savage_do_init_bci(dev, &init);
 945         case SAVAGE_CLEANUP_BCI:
 946                 return savage_do_cleanup_bci(dev);
 947         }
 948
 949         return DRM_ERR(EINVAL);
 950 }
 951
 952 static int savage_bci_event_emit(DRM_IOCTL_ARGS)
 953 {
 954         DRM_DEVICE;
 955         drm_savage_private_t *dev_priv = dev->dev_private;
 956         drm_savage_event_emit_t event;
 957
 958         DRM_DEBUG("\n");
 959
 960         LOCK_TEST_WITH_RETURN(dev, filp);
 961
 962         DRM_COPY_FROM_USER_IOCTL(event, (drm_savage_event_emit_t __user *) data,
 963                                  sizeof(event));
 964
 965         event.count = savage_bci_emit_event(dev_priv, event.flags);
 966         event.count |= dev_priv->event_wrap << 16;
 967         DRM_COPY_TO_USER_IOCTL(&((drm_savage_event_emit_t __user *) data)->
 968                                count, event.count, sizeof(event.count));
 969         return 0;
 970 }
 971
 972 static int savage_bci_event_wait(DRM_IOCTL_ARGS)
 973 {
 974         DRM_DEVICE;
 975         drm_savage_private_t *dev_priv = dev->dev_private;
 976         drm_savage_event_wait_t event;
 977         unsigned int event_e, hw_e;
 978         unsigned int event_w, hw_w;
 979
 980         DRM_DEBUG("\n");
 981
 982         DRM_COPY_FROM_USER_IOCTL(event, (drm_savage_event_wait_t __user *) data,
 983                                  sizeof(event));
 984
 985         UPDATE_EVENT_COUNTER();
 986         if (dev_priv->status_ptr)
 987                 hw_e = dev_priv->status_ptr[1] & 0xffff;
 988         else
 989                 hw_e = SAVAGE_READ(SAVAGE_STATUS_WORD1) & 0xffff;
 990         hw_w = dev_priv->event_wrap;
 991         if (hw_e > dev_priv->event_counter)
 992                 hw_w--;         /* hardware hasn't passed the last wrap yet */
 993
 994         event_e = event.count & 0xffff;
 995         event_w = event.count >> 16;
 996
 997         /* Don't need to wait if
 998          * - event counter wrapped since the event was emitted or
 999          * - the hardware has advanced up to or over the event to wait for.
1000          */
1001         if (event_w < hw_w || (event_w == hw_w && event_e <= hw_e))
1002                 return 0;
1003         else
1004                 return dev_priv->wait_evnt(dev_priv, event_e);
1005 }
1006
1007 /*
1008  * DMA buffer management
1009  */
1010
1011 static int savage_bci_get_buffers(DRMFILE filp, drm_device_t * dev,
1012                                   drm_dma_t * d)
1013 {
1014         drm_buf_t *buf;
1015         int i;
1016
1017         for (i = d->granted_count; i < d->request_count; i++) {
1018                 buf = savage_freelist_get(dev);
1019                 if (!buf)
1020                         return DRM_ERR(EAGAIN);
1021
1022                 buf->filp = filp;
1023
1024                 if (DRM_COPY_TO_USER(&d->request_indices[i],
1025                                      &buf->idx, sizeof(buf->idx)))
1026                         return DRM_ERR(EFAULT);
1027                 if (DRM_COPY_TO_USER(&d->request_sizes[i],
1028                                      &buf->total, sizeof(buf->total)))
1029                         return DRM_ERR(EFAULT);
1030
1031                 d->granted_count++;
1032         }
1033         return 0;
1034 }
1035
1036 int savage_bci_buffers(DRM_IOCTL_ARGS)
1037 {
1038         DRM_DEVICE;
1039         drm_device_dma_t *dma = dev->dma;
1040         drm_dma_t d;
1041         int ret = 0;
1042
1043         LOCK_TEST_WITH_RETURN(dev, filp);
1044
1045         DRM_COPY_FROM_USER_IOCTL(d, (drm_dma_t __user *) data, sizeof(d));
1046
1047         /* Please don't send us buffers.
1048          */
1049         if (d.send_count != 0) {
1050                 DRM_ERROR("Process %d trying to send %d buffers via drmDMA\n",
1051                           DRM_CURRENTPID, d.send_count);
1052                 return DRM_ERR(EINVAL);
1053         }
1054
1055         /* We'll send you buffers.
1056          */
1057         if (d.request_count < 0 || d.request_count > dma->buf_count) {
1058                 DRM_ERROR("Process %d trying to get %d buffers (of %d max)\n",
1059                           DRM_CURRENTPID, d.request_count, dma->buf_count);
1060                 return DRM_ERR(EINVAL);
1061         }
1062
1063         d.granted_count = 0;
1064
1065         if (d.request_count) {
1066                 ret = savage_bci_get_buffers(filp, dev, &d);
1067         }
1068
1069         DRM_COPY_TO_USER_IOCTL((drm_dma_t __user *) data, d, sizeof(d));
1070
1071         return ret;
1072 }
1073
1074 void savage_reclaim_buffers(drm_device_t * dev, DRMFILE filp)
1075 {
1076         drm_device_dma_t *dma = dev->dma;
1077         drm_savage_private_t *dev_priv = dev->dev_private;
1078         int i;
1079
1080         if (!dma)
1081                 return;
1082         if (!dev_priv)
1083                 return;
1084         if (!dma->buflist)
1085                 return;
1086
1087         /*i830_flush_queue(dev); */
1088
1089         for (i = 0; i < dma->buf_count; i++) {
1090                 drm_buf_t *buf = dma->buflist[i];
1091                 drm_savage_buf_priv_t *buf_priv = buf->dev_private;
1092
1093                 if (buf->filp == filp && buf_priv &&
1094                     buf_priv->next == NULL && buf_priv->prev == NULL) {
1095                         uint16_t event;
1096                         DRM_DEBUG("reclaimed from client\n");
1097                         event = savage_bci_emit_event(dev_priv, SAVAGE_WAIT_3D);
1098                         SET_AGE(&buf_priv->age, event, dev_priv->event_wrap);
1099                         savage_freelist_put(dev, buf);
1100                 }
1101         }
1102
1103         drm_core_reclaim_buffers(dev, filp);
1104 }
1105
1106 drm_ioctl_desc_t savage_ioctls[] = {
1107         [DRM_IOCTL_NR(DRM_SAVAGE_BCI_INIT)] = {savage_bci_init, 1, 1},
1108         [DRM_IOCTL_NR(DRM_SAVAGE_BCI_CMDBUF)] = {savage_bci_cmdbuf, 1, 0},
1109         [DRM_IOCTL_NR(DRM_SAVAGE_BCI_EVENT_EMIT)] = {savage_bci_event_emit, 1, 0},
1110         [DRM_IOCTL_NR(DRM_SAVAGE_BCI_EVENT_WAIT)] = {savage_bci_event_wait, 1, 0},
1111 };
1112
1113 int savage_max_ioctl = DRM_ARRAY_SIZE(savage_ioctls);