drivers/gpu/drm/i915/i915_dma.c

   1 /* i915_dma.c -- DMA support for the I915 -*- linux-c -*-
   2  */
   3 /*
   4  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the
   9  * "Software"), to deal in the Software without restriction, including
  10  * without limitation the rights to use, copy, modify, merge, publish,
  11  * distribute, sub license, and/or sell copies of the Software, and to
  12  * permit persons to whom the Software is furnished to do so, subject to
  13  * the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the
  16  * next paragraph) shall be included in all copies or substantial portions
  17  * of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  22  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  23  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  24  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  25  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26  *
  27  */
  28
  29 #include "drmP.h"
  30 #include "drm.h"
  31 #include "drm_crtc_helper.h"
  32 #include "drm_fb_helper.h"
  33 #include "intel_drv.h"
  34 #include "i915_drm.h"
  35 #include "i915_drv.h"
  36 #include "i915_trace.h"
  37 #include <linux/vgaarb.h>
  38
  39 /* Really want an OS-independent resettable timer.  Would like to have
  40  * this loop run for (eg) 3 sec, but have the timer reset every time
  41  * the head pointer changes, so that EBUSY only happens if the ring
  42  * actually stalls for (eg) 3 seconds.
  43  */
  44 int i915_wait_ring(struct drm_device * dev, int n, const char *caller)
  45 {
  46         drm_i915_private_t *dev_priv = dev->dev_private;
  47         drm_i915_ring_buffer_t *ring = &(dev_priv->ring);
  48         u32 acthd_reg = IS_I965G(dev) ? ACTHD_I965 : ACTHD;
  49         u32 last_acthd = I915_READ(acthd_reg);
  50         u32 acthd;
  51         u32 last_head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
  52         int i;
  53
  54         trace_i915_ring_wait_begin (dev);
  55
  56         for (i = 0; i < 100000; i++) {
  57                 ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
  58                 acthd = I915_READ(acthd_reg);
  59                 ring->space = ring->head - (ring->tail + 8);
  60                 if (ring->space < 0)
  61                         ring->space += ring->Size;
  62                 if (ring->space >= n) {
  63                         trace_i915_ring_wait_end (dev);
  64                         return 0;
  65                 }
  66
  67                 if (dev->primary->master) {
  68                         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
  69                         if (master_priv->sarea_priv)
  70                                 master_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
  71                 }
  72
  73
  74                 if (ring->head != last_head)
  75                         i = 0;
  76                 if (acthd != last_acthd)
  77                         i = 0;
  78
  79                 last_head = ring->head;
  80                 last_acthd = acthd;
  81                 msleep_interruptible(10);
  82
  83         }
  84
  85         trace_i915_ring_wait_end (dev);
  86         return -EBUSY;
  87 }
  88
  89 /* As a ringbuffer is only allowed to wrap between instructions, fill
  90  * the tail with NOOPs.
  91  */
  92 int i915_wrap_ring(struct drm_device *dev)
  93 {
  94         drm_i915_private_t *dev_priv = dev->dev_private;
  95         volatile unsigned int *virt;
  96         int rem;
  97
  98         rem = dev_priv->ring.Size - dev_priv->ring.tail;
  99         if (dev_priv->ring.space < rem) {
 100                 int ret = i915_wait_ring(dev, rem, __func__);
 101                 if (ret)
 102                         return ret;
 103         }
 104         dev_priv->ring.space -= rem;
 105
 106         virt = (unsigned int *)
 107                 (dev_priv->ring.virtual_start + dev_priv->ring.tail);
 108         rem /= 4;
 109         while (rem--)
 110                 *virt++ = MI_NOOP;
 111
 112         dev_priv->ring.tail = 0;
 113
 114         return 0;
 115 }
 116
 117 /**
 118  * Sets up the hardware status page for devices that need a physical address
 119  * in the register.
 120  */
 121 static int i915_init_phys_hws(struct drm_device *dev)
 122 {
 123         drm_i915_private_t *dev_priv = dev->dev_private;
 124         /* Program Hardware Status Page */
 125         dev_priv->status_page_dmah =
 126                 drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE);
 127
 128         if (!dev_priv->status_page_dmah) {
 129                 DRM_ERROR("Can not allocate hardware status page\n");
 130                 return -ENOMEM;
 131         }
 132         dev_priv->hw_status_page = dev_priv->status_page_dmah->vaddr;
 133         dev_priv->dma_status_page = dev_priv->status_page_dmah->busaddr;
 134
 135         memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
 136
 137         I915_WRITE(HWS_PGA, dev_priv->dma_status_page);
 138         DRM_DEBUG_DRIVER("Enabled hardware status page\n");
 139         return 0;
 140 }
 141
 142 /**
 143  * Frees the hardware status page, whether it's a physical address or a virtual
 144  * address set up by the X Server.
 145  */
 146 static void i915_free_hws(struct drm_device *dev)
 147 {
 148         drm_i915_private_t *dev_priv = dev->dev_private;
 149         if (dev_priv->status_page_dmah) {
 150                 drm_pci_free(dev, dev_priv->status_page_dmah);
 151                 dev_priv->status_page_dmah = NULL;
 152         }
 153
 154         if (dev_priv->status_gfx_addr) {
 155                 dev_priv->status_gfx_addr = 0;
 156                 drm_core_ioremapfree(&dev_priv->hws_map, dev);
 157         }
 158
 159         /* Need to rewrite hardware status page */
 160         I915_WRITE(HWS_PGA, 0x1ffff000);
 161 }
 162
 163 void i915_kernel_lost_context(struct drm_device * dev)
 164 {
 165         drm_i915_private_t *dev_priv = dev->dev_private;
 166         struct drm_i915_master_private *master_priv;
 167         drm_i915_ring_buffer_t *ring = &(dev_priv->ring);
 168
 169         /*
 170          * We should never lose context on the ring with modesetting
 171          * as we don't expose it to userspace
 172          */
 173         if (drm_core_check_feature(dev, DRIVER_MODESET))
 174                 return;
 175
 176         ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
 177         ring->tail = I915_READ(PRB0_TAIL) & TAIL_ADDR;
 178         ring->space = ring->head - (ring->tail + 8);
 179         if (ring->space < 0)
 180                 ring->space += ring->Size;
 181
 182         if (!dev->primary->master)
 183                 return;
 184
 185         master_priv = dev->primary->master->driver_priv;
 186         if (ring->head == ring->tail && master_priv->sarea_priv)
 187                 master_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY;
 188 }
 189
 190 static int i915_dma_cleanup(struct drm_device * dev)
 191 {
 192         drm_i915_private_t *dev_priv = dev->dev_private;
 193         /* Make sure interrupts are disabled here because the uninstall ioctl
 194          * may not have been called from userspace and after dev_private
 195          * is freed, it's too late.
 196          */
 197         if (dev->irq_enabled)
 198                 drm_irq_uninstall(dev);
 199
 200         if (dev_priv->ring.virtual_start) {
 201                 drm_core_ioremapfree(&dev_priv->ring.map, dev);
 202                 dev_priv->ring.virtual_start = NULL;
 203                 dev_priv->ring.map.handle = NULL;
 204                 dev_priv->ring.map.size = 0;
 205         }
 206
 207         /* Clear the HWS virtual address at teardown */
 208         if (I915_NEED_GFX_HWS(dev))
 209                 i915_free_hws(dev);
 210
 211         return 0;
 212 }
 213
 214 static int i915_initialize(struct drm_device * dev, drm_i915_init_t * init)
 215 {
 216         drm_i915_private_t *dev_priv = dev->dev_private;
 217         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 218
 219         master_priv->sarea = drm_getsarea(dev);
 220         if (master_priv->sarea) {
 221                 master_priv->sarea_priv = (drm_i915_sarea_t *)
 222                         ((u8 *)master_priv->sarea->handle + init->sarea_priv_offset);
 223         } else {
 224                 DRM_DEBUG_DRIVER("sarea not found assuming DRI2 userspace\n");
 225         }
 226
 227         if (init->ring_size != 0) {
 228                 if (dev_priv->ring.ring_obj != NULL) {
 229                         i915_dma_cleanup(dev);
 230                         DRM_ERROR("Client tried to initialize ringbuffer in "
 231                                   "GEM mode\n");
 232                         return -EINVAL;
 233                 }
 234
 235                 dev_priv->ring.Size = init->ring_size;
 236
 237                 dev_priv->ring.map.offset = init->ring_start;
 238                 dev_priv->ring.map.size = init->ring_size;
 239                 dev_priv->ring.map.type = 0;
 240                 dev_priv->ring.map.flags = 0;
 241                 dev_priv->ring.map.mtrr = 0;
 242
 243                 drm_core_ioremap_wc(&dev_priv->ring.map, dev);
 244
 245                 if (dev_priv->ring.map.handle == NULL) {
 246                         i915_dma_cleanup(dev);
 247                         DRM_ERROR("can not ioremap virtual address for"
 248                                   " ring buffer\n");
 249                         return -ENOMEM;
 250                 }
 251         }
 252
 253         dev_priv->ring.virtual_start = dev_priv->ring.map.handle;
 254
 255         dev_priv->cpp = init->cpp;
 256         dev_priv->back_offset = init->back_offset;
 257         dev_priv->front_offset = init->front_offset;
 258         dev_priv->current_page = 0;
 259         if (master_priv->sarea_priv)
 260                 master_priv->sarea_priv->pf_current_page = 0;
 261
 262         /* Allow hardware batchbuffers unless told otherwise.
 263          */
 264         dev_priv->allow_batchbuffer = 1;
 265
 266         return 0;
 267 }
 268
 269 static int i915_dma_resume(struct drm_device * dev)
 270 {
 271         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 272
 273         DRM_DEBUG_DRIVER("%s\n", __func__);
 274
 275         if (dev_priv->ring.map.handle == NULL) {
 276                 DRM_ERROR("can not ioremap virtual address for"
 277                           " ring buffer\n");
 278                 return -ENOMEM;
 279         }
 280
 281         /* Program Hardware Status Page */
 282         if (!dev_priv->hw_status_page) {
 283                 DRM_ERROR("Can not find hardware status page\n");
 284                 return -EINVAL;
 285         }
 286         DRM_DEBUG_DRIVER("hw status page @ %p\n",
 287                                 dev_priv->hw_status_page);
 288
 289         if (dev_priv->status_gfx_addr != 0)
 290                 I915_WRITE(HWS_PGA, dev_priv->status_gfx_addr);
 291         else
 292                 I915_WRITE(HWS_PGA, dev_priv->dma_status_page);
 293         DRM_DEBUG_DRIVER("Enabled hardware status page\n");
 294
 295         return 0;
 296 }
 297
 298 static int i915_dma_init(struct drm_device *dev, void *data,
 299                          struct drm_file *file_priv)
 300 {
 301         drm_i915_init_t *init = data;
 302         int retcode = 0;
 303
 304         switch (init->func) {
 305         case I915_INIT_DMA:
 306                 retcode = i915_initialize(dev, init);
 307                 break;
 308         case I915_CLEANUP_DMA:
 309                 retcode = i915_dma_cleanup(dev);
 310                 break;
 311         case I915_RESUME_DMA:
 312                 retcode = i915_dma_resume(dev);
 313                 break;
 314         default:
 315                 retcode = -EINVAL;
 316                 break;
 317         }
 318
 319         return retcode;
 320 }
 321
 322 /* Implement basically the same security restrictions as hardware does
 323  * for MI_BATCH_NON_SECURE.  These can be made stricter at any time.
 324  *
 325  * Most of the calculations below involve calculating the size of a
 326  * particular instruction.  It's important to get the size right as
 327  * that tells us where the next instruction to check is.  Any illegal
 328  * instruction detected will be given a size of zero, which is a
 329  * signal to abort the rest of the buffer.
 330  */
 331 static int do_validate_cmd(int cmd)
 332 {
 333         switch (((cmd >> 29) & 0x7)) {
 334         case 0x0:
 335                 switch ((cmd >> 23) & 0x3f) {
 336                 case 0x0:
 337                         return 1;       /* MI_NOOP */
 338                 case 0x4:
 339                         return 1;       /* MI_FLUSH */
 340                 default:
 341                         return 0;       /* disallow everything else */
 342                 }
 343                 break;
 344         case 0x1:
 345                 return 0;       /* reserved */
 346         case 0x2:
 347                 return (cmd & 0xff) + 2;        /* 2d commands */
 348         case 0x3:
 349                 if (((cmd >> 24) & 0x1f) <= 0x18)
 350                         return 1;
 351
 352                 switch ((cmd >> 24) & 0x1f) {
 353                 case 0x1c:
 354                         return 1;
 355                 case 0x1d:
 356                         switch ((cmd >> 16) & 0xff) {
 357                         case 0x3:
 358                                 return (cmd & 0x1f) + 2;
 359                         case 0x4:
 360                                 return (cmd & 0xf) + 2;
 361                         default:
 362                                 return (cmd & 0xffff) + 2;
 363                         }
 364                 case 0x1e:
 365                         if (cmd & (1 << 23))
 366                                 return (cmd & 0xffff) + 1;
 367                         else
 368                                 return 1;
 369                 case 0x1f:
 370                         if ((cmd & (1 << 23)) == 0)     /* inline vertices */
 371                                 return (cmd & 0x1ffff) + 2;
 372                         else if (cmd & (1 << 17))       /* indirect random */
 373                                 if ((cmd & 0xffff) == 0)
 374                                         return 0;       /* unknown length, too hard */
 375                                 else
 376                                         return (((cmd & 0xffff) + 1) / 2) + 1;
 377                         else
 378                                 return 2;       /* indirect sequential */
 379                 default:
 380                         return 0;
 381                 }
 382         default:
 383                 return 0;
 384         }
 385
 386         return 0;
 387 }
 388
 389 static int validate_cmd(int cmd)
 390 {
 391         int ret = do_validate_cmd(cmd);
 392
 393 /*      printk("validate_cmd( %x ): %d\n", cmd, ret); */
 394
 395         return ret;
 396 }
 397
 398 static int i915_emit_cmds(struct drm_device * dev, int *buffer, int dwords)
 399 {
 400         drm_i915_private_t *dev_priv = dev->dev_private;
 401         int i;
 402         RING_LOCALS;
 403
 404         if ((dwords+1) * sizeof(int) >= dev_priv->ring.Size - 8)
 405                 return -EINVAL;
 406
 407         BEGIN_LP_RING((dwords+1)&~1);
 408
 409         for (i = 0; i < dwords;) {
 410                 int cmd, sz;
 411
 412                 cmd = buffer[i];
 413
 414                 if ((sz = validate_cmd(cmd)) == 0 || i + sz > dwords)
 415                         return -EINVAL;
 416
 417                 OUT_RING(cmd);
 418
 419                 while (++i, --sz) {
 420                         OUT_RING(buffer[i]);
 421                 }
 422         }
 423
 424         if (dwords & 1)
 425                 OUT_RING(0);
 426
 427         ADVANCE_LP_RING();
 428
 429         return 0;
 430 }
 431
 432 int
 433 i915_emit_box(struct drm_device *dev,
 434               struct drm_clip_rect *boxes,
 435               int i, int DR1, int DR4)
 436 {
 437         drm_i915_private_t *dev_priv = dev->dev_private;
 438         struct drm_clip_rect box = boxes[i];
 439         RING_LOCALS;
 440
 441         if (box.y2 <= box.y1 || box.x2 <= box.x1 || box.y2 <= 0 || box.x2 <= 0) {
 442                 DRM_ERROR("Bad box %d,%d..%d,%d\n",
 443                           box.x1, box.y1, box.x2, box.y2);
 444                 return -EINVAL;
 445         }
 446
 447         if (IS_I965G(dev)) {
 448                 BEGIN_LP_RING(4);
 449                 OUT_RING(GFX_OP_DRAWRECT_INFO_I965);
 450                 OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
 451                 OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
 452                 OUT_RING(DR4);
 453                 ADVANCE_LP_RING();
 454         } else {
 455                 BEGIN_LP_RING(6);
 456                 OUT_RING(GFX_OP_DRAWRECT_INFO);
 457                 OUT_RING(DR1);
 458                 OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
 459                 OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
 460                 OUT_RING(DR4);
 461                 OUT_RING(0);
 462                 ADVANCE_LP_RING();
 463         }
 464
 465         return 0;
 466 }
 467
 468 /* XXX: Emitting the counter should really be moved to part of the IRQ
 469  * emit. For now, do it in both places:
 470  */
 471
 472 static void i915_emit_breadcrumb(struct drm_device *dev)
 473 {
 474         drm_i915_private_t *dev_priv = dev->dev_private;
 475         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 476         RING_LOCALS;
 477
 478         dev_priv->counter++;
 479         if (dev_priv->counter > 0x7FFFFFFFUL)
 480                 dev_priv->counter = 0;
 481         if (master_priv->sarea_priv)
 482                 master_priv->sarea_priv->last_enqueue = dev_priv->counter;
 483
 484         BEGIN_LP_RING(4);
 485         OUT_RING(MI_STORE_DWORD_INDEX);
 486         OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
 487         OUT_RING(dev_priv->counter);
 488         OUT_RING(0);
 489         ADVANCE_LP_RING();
 490 }
 491
 492 static int i915_dispatch_cmdbuffer(struct drm_device * dev,
 493                                    drm_i915_cmdbuffer_t *cmd,
 494                                    struct drm_clip_rect *cliprects,
 495                                    void *cmdbuf)
 496 {
 497         int nbox = cmd->num_cliprects;
 498         int i = 0, count, ret;
 499
 500         if (cmd->sz & 0x3) {
 501                 DRM_ERROR("alignment");
 502                 return -EINVAL;
 503         }
 504
 505         i915_kernel_lost_context(dev);
 506
 507         count = nbox ? nbox : 1;
 508
 509         for (i = 0; i < count; i++) {
 510                 if (i < nbox) {
 511                         ret = i915_emit_box(dev, cliprects, i,
 512                                             cmd->DR1, cmd->DR4);
 513                         if (ret)
 514                                 return ret;
 515                 }
 516
 517                 ret = i915_emit_cmds(dev, cmdbuf, cmd->sz / 4);
 518                 if (ret)
 519                         return ret;
 520         }
 521
 522         i915_emit_breadcrumb(dev);
 523         return 0;
 524 }
 525
 526 static int i915_dispatch_batchbuffer(struct drm_device * dev,
 527                                      drm_i915_batchbuffer_t * batch,
 528                                      struct drm_clip_rect *cliprects)
 529 {
 530         drm_i915_private_t *dev_priv = dev->dev_private;
 531         int nbox = batch->num_cliprects;
 532         int i = 0, count;
 533         RING_LOCALS;
 534
 535         if ((batch->start | batch->used) & 0x7) {
 536                 DRM_ERROR("alignment");
 537                 return -EINVAL;
 538         }
 539
 540         i915_kernel_lost_context(dev);
 541
 542         count = nbox ? nbox : 1;
 543
 544         for (i = 0; i < count; i++) {
 545                 if (i < nbox) {
 546                         int ret = i915_emit_box(dev, cliprects, i,
 547                                                 batch->DR1, batch->DR4);
 548                         if (ret)
 549                                 return ret;
 550                 }
 551
 552                 if (!IS_I830(dev) && !IS_845G(dev)) {
 553                         BEGIN_LP_RING(2);
 554                         if (IS_I965G(dev)) {
 555                                 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6) | MI_BATCH_NON_SECURE_I965);
 556                                 OUT_RING(batch->start);
 557                         } else {
 558                                 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
 559                                 OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 560                         }
 561                         ADVANCE_LP_RING();
 562                 } else {
 563                         BEGIN_LP_RING(4);
 564                         OUT_RING(MI_BATCH_BUFFER);
 565                         OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 566                         OUT_RING(batch->start + batch->used - 4);
 567                         OUT_RING(0);
 568                         ADVANCE_LP_RING();
 569                 }
 570         }
 571
 572         i915_emit_breadcrumb(dev);
 573
 574         return 0;
 575 }
 576
 577 static int i915_dispatch_flip(struct drm_device * dev)
 578 {
 579         drm_i915_private_t *dev_priv = dev->dev_private;
 580         struct drm_i915_master_private *master_priv =
 581                 dev->primary->master->driver_priv;
 582         RING_LOCALS;
 583
 584         if (!master_priv->sarea_priv)
 585                 return -EINVAL;
 586
 587         DRM_DEBUG_DRIVER("%s: page=%d pfCurrentPage=%d\n",
 588                           __func__,
 589                          dev_priv->current_page,
 590                          master_priv->sarea_priv->pf_current_page);
 591
 592         i915_kernel_lost_context(dev);
 593
 594         BEGIN_LP_RING(2);
 595         OUT_RING(MI_FLUSH | MI_READ_FLUSH);
 596         OUT_RING(0);
 597         ADVANCE_LP_RING();
 598
 599         BEGIN_LP_RING(6);
 600         OUT_RING(CMD_OP_DISPLAYBUFFER_INFO | ASYNC_FLIP);
 601         OUT_RING(0);
 602         if (dev_priv->current_page == 0) {
 603                 OUT_RING(dev_priv->back_offset);
 604                 dev_priv->current_page = 1;
 605         } else {
 606                 OUT_RING(dev_priv->front_offset);
 607                 dev_priv->current_page = 0;
 608         }
 609         OUT_RING(0);
 610         ADVANCE_LP_RING();
 611
 612         BEGIN_LP_RING(2);
 613         OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_A_FLIP);
 614         OUT_RING(0);
 615         ADVANCE_LP_RING();
 616
 617         master_priv->sarea_priv->last_enqueue = dev_priv->counter++;
 618
 619         BEGIN_LP_RING(4);
 620         OUT_RING(MI_STORE_DWORD_INDEX);
 621         OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
 622         OUT_RING(dev_priv->counter);
 623         OUT_RING(0);
 624         ADVANCE_LP_RING();
 625
 626         master_priv->sarea_priv->pf_current_page = dev_priv->current_page;
 627         return 0;
 628 }
 629
 630 static int i915_quiescent(struct drm_device * dev)
 631 {
 632         drm_i915_private_t *dev_priv = dev->dev_private;
 633
 634         i915_kernel_lost_context(dev);
 635         return i915_wait_ring(dev, dev_priv->ring.Size - 8, __func__);
 636 }
 637
 638 static int i915_flush_ioctl(struct drm_device *dev, void *data,
 639                             struct drm_file *file_priv)
 640 {
 641         int ret;
 642
 643         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 644
 645         mutex_lock(&dev->struct_mutex);
 646         ret = i915_quiescent(dev);
 647         mutex_unlock(&dev->struct_mutex);
 648
 649         return ret;
 650 }
 651
 652 static int i915_batchbuffer(struct drm_device *dev, void *data,
 653                             struct drm_file *file_priv)
 654 {
 655         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 656         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 657         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 658             master_priv->sarea_priv;
 659         drm_i915_batchbuffer_t *batch = data;
 660         int ret;
 661         struct drm_clip_rect *cliprects = NULL;
 662
 663         if (!dev_priv->allow_batchbuffer) {
 664                 DRM_ERROR("Batchbuffer ioctl disabled\n");
 665                 return -EINVAL;
 666         }
 667
 668         DRM_DEBUG_DRIVER("i915 batchbuffer, start %x used %d cliprects %d\n",
 669                         batch->start, batch->used, batch->num_cliprects);
 670
 671         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 672
 673         if (batch->num_cliprects < 0)
 674                 return -EINVAL;
 675
 676         if (batch->num_cliprects) {
 677                 cliprects = kcalloc(batch->num_cliprects,
 678                                     sizeof(struct drm_clip_rect),
 679                                     GFP_KERNEL);
 680                 if (cliprects == NULL)
 681                         return -ENOMEM;
 682
 683                 ret = copy_from_user(cliprects, batch->cliprects,
 684                                      batch->num_cliprects *
 685                                      sizeof(struct drm_clip_rect));
 686                 if (ret != 0)
 687                         goto fail_free;
 688         }
 689
 690         mutex_lock(&dev->struct_mutex);
 691         ret = i915_dispatch_batchbuffer(dev, batch, cliprects);
 692         mutex_unlock(&dev->struct_mutex);
 693
 694         if (sarea_priv)
 695                 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
 696
 697 fail_free:
 698         kfree(cliprects);
 699
 700         return ret;
 701 }
 702
 703 static int i915_cmdbuffer(struct drm_device *dev, void *data,
 704                           struct drm_file *file_priv)
 705 {
 706         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 707         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 708         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 709             master_priv->sarea_priv;
 710         drm_i915_cmdbuffer_t *cmdbuf = data;
 711         struct drm_clip_rect *cliprects = NULL;
 712         void *batch_data;
 713         int ret;
 714
 715         DRM_DEBUG_DRIVER("i915 cmdbuffer, buf %p sz %d cliprects %d\n",
 716                         cmdbuf->buf, cmdbuf->sz, cmdbuf->num_cliprects);
 717
 718         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 719
 720         if (cmdbuf->num_cliprects < 0)
 721                 return -EINVAL;
 722
 723         batch_data = kmalloc(cmdbuf->sz, GFP_KERNEL);
 724         if (batch_data == NULL)
 725                 return -ENOMEM;
 726
 727         ret = copy_from_user(batch_data, cmdbuf->buf, cmdbuf->sz);
 728         if (ret != 0)
 729                 goto fail_batch_free;
 730
 731         if (cmdbuf->num_cliprects) {
 732                 cliprects = kcalloc(cmdbuf->num_cliprects,
 733                                     sizeof(struct drm_clip_rect), GFP_KERNEL);
 734                 if (cliprects == NULL)
 735                         goto fail_batch_free;
 736
 737                 ret = copy_from_user(cliprects, cmdbuf->cliprects,
 738                                      cmdbuf->num_cliprects *
 739                                      sizeof(struct drm_clip_rect));
 740                 if (ret != 0)
 741                         goto fail_clip_free;
 742         }
 743
 744         mutex_lock(&dev->struct_mutex);
 745         ret = i915_dispatch_cmdbuffer(dev, cmdbuf, cliprects, batch_data);
 746         mutex_unlock(&dev->struct_mutex);
 747         if (ret) {
 748                 DRM_ERROR("i915_dispatch_cmdbuffer failed\n");
 749                 goto fail_clip_free;
 750         }
 751
 752         if (sarea_priv)
 753                 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
 754
 755 fail_clip_free:
 756         kfree(cliprects);
 757 fail_batch_free:
 758         kfree(batch_data);
 759
 760         return ret;
 761 }
 762
 763 static int i915_flip_bufs(struct drm_device *dev, void *data,
 764                           struct drm_file *file_priv)
 765 {
 766         int ret;
 767
 768         DRM_DEBUG_DRIVER("%s\n", __func__);
 769
 770         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 771
 772         mutex_lock(&dev->struct_mutex);
 773         ret = i915_dispatch_flip(dev);
 774         mutex_unlock(&dev->struct_mutex);
 775
 776         return ret;
 777 }
 778
 779 static int i915_getparam(struct drm_device *dev, void *data,
 780                          struct drm_file *file_priv)
 781 {
 782         drm_i915_private_t *dev_priv = dev->dev_private;
 783         drm_i915_getparam_t *param = data;
 784         int value;
 785
 786         if (!dev_priv) {
 787                 DRM_ERROR("called with no initialization\n");
 788                 return -EINVAL;
 789         }
 790
 791         switch (param->param) {
 792         case I915_PARAM_IRQ_ACTIVE:
 793                 value = dev->pdev->irq ? 1 : 0;
 794                 break;
 795         case I915_PARAM_ALLOW_BATCHBUFFER:
 796                 value = dev_priv->allow_batchbuffer ? 1 : 0;
 797                 break;
 798         case I915_PARAM_LAST_DISPATCH:
 799                 value = READ_BREADCRUMB(dev_priv);
 800                 break;
 801         case I915_PARAM_CHIPSET_ID:
 802                 value = dev->pci_device;
 803                 break;
 804         case I915_PARAM_HAS_GEM:
 805                 value = dev_priv->has_gem;
 806                 break;
 807         case I915_PARAM_NUM_FENCES_AVAIL:
 808                 value = dev_priv->num_fence_regs - dev_priv->fence_reg_start;
 809                 break;
 810         case I915_PARAM_HAS_OVERLAY:
 811                 value = dev_priv->overlay ? 1 : 0;
 812                 break;
 813         case I915_PARAM_HAS_PAGEFLIPPING:
 814                 value = 1;
 815                 break;
 816         case I915_PARAM_HAS_EXECBUF2:
 817                 /* depends on GEM */
 818                 value = dev_priv->has_gem;
 819                 break;
 820         default:
 821                 DRM_DEBUG_DRIVER("Unknown parameter %d\n",
 822                                  param->param);
 823                 return -EINVAL;
 824         }
 825
 826         if (DRM_COPY_TO_USER(param->value, &value, sizeof(int))) {
 827                 DRM_ERROR("DRM_COPY_TO_USER failed\n");
 828                 return -EFAULT;
 829         }
 830
 831         return 0;
 832 }
 833
 834 static int i915_setparam(struct drm_device *dev, void *data,
 835                          struct drm_file *file_priv)
 836 {
 837         drm_i915_private_t *dev_priv = dev->dev_private;
 838         drm_i915_setparam_t *param = data;
 839
 840         if (!dev_priv) {
 841                 DRM_ERROR("called with no initialization\n");
 842                 return -EINVAL;
 843         }
 844
 845         switch (param->param) {
 846         case I915_SETPARAM_USE_MI_BATCHBUFFER_START:
 847                 break;
 848         case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY:
 849                 dev_priv->tex_lru_log_granularity = param->value;
 850                 break;
 851         case I915_SETPARAM_ALLOW_BATCHBUFFER:
 852                 dev_priv->allow_batchbuffer = param->value;
 853                 break;
 854         case I915_SETPARAM_NUM_USED_FENCES:
 855                 if (param->value > dev_priv->num_fence_regs ||
 856                     param->value < 0)
 857                         return -EINVAL;
 858                 /* Userspace can use first N regs */
 859                 dev_priv->fence_reg_start = param->value;
 860                 break;
 861         default:
 862                 DRM_DEBUG_DRIVER("unknown parameter %d\n",
 863                                         param->param);
 864                 return -EINVAL;
 865         }
 866
 867         return 0;
 868 }
 869
 870 static int i915_set_status_page(struct drm_device *dev, void *data,
 871                                 struct drm_file *file_priv)
 872 {
 873         drm_i915_private_t *dev_priv = dev->dev_private;
 874         drm_i915_hws_addr_t *hws = data;
 875
 876         if (!I915_NEED_GFX_HWS(dev))
 877                 return -EINVAL;
 878
 879         if (!dev_priv) {
 880                 DRM_ERROR("called with no initialization\n");
 881                 return -EINVAL;
 882         }
 883
 884         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 885                 WARN(1, "tried to set status page when mode setting active\n");
 886                 return 0;
 887         }
 888
 889         DRM_DEBUG_DRIVER("set status page addr 0x%08x\n", (u32)hws->addr);
 890
 891         dev_priv->status_gfx_addr = hws->addr & (0x1ffff<<12);
 892
 893         dev_priv->hws_map.offset = dev->agp->base + hws->addr;
 894         dev_priv->hws_map.size = 4*1024;
 895         dev_priv->hws_map.type = 0;
 896         dev_priv->hws_map.flags = 0;
 897         dev_priv->hws_map.mtrr = 0;
 898
 899         drm_core_ioremap_wc(&dev_priv->hws_map, dev);
 900         if (dev_priv->hws_map.handle == NULL) {
 901                 i915_dma_cleanup(dev);
 902                 dev_priv->status_gfx_addr = 0;
 903                 DRM_ERROR("can not ioremap virtual address for"
 904                                 " G33 hw status page\n");
 905                 return -ENOMEM;
 906         }
 907         dev_priv->hw_status_page = dev_priv->hws_map.handle;
 908
 909         memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
 910         I915_WRITE(HWS_PGA, dev_priv->status_gfx_addr);
 911         DRM_DEBUG_DRIVER("load hws HWS_PGA with gfx mem 0x%x\n",
 912                                 dev_priv->status_gfx_addr);
 913         DRM_DEBUG_DRIVER("load hws at %p\n",
 914                                 dev_priv->hw_status_page);
 915         return 0;
 916 }
 917
 918 static int i915_get_bridge_dev(struct drm_device *dev)
 919 {
 920         struct drm_i915_private *dev_priv = dev->dev_private;
 921
 922         dev_priv->bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0,0));
 923         if (!dev_priv->bridge_dev) {
 924                 DRM_ERROR("bridge device not found\n");
 925                 return -1;
 926         }
 927         return 0;
 928 }
 929
 930 /**
 931  * i915_probe_agp - get AGP bootup configuration
 932  * @pdev: PCI device
 933  * @aperture_size: returns AGP aperture configured size
 934  * @preallocated_size: returns size of BIOS preallocated AGP space
 935  *
 936  * Since Intel integrated graphics are UMA, the BIOS has to set aside
 937  * some RAM for the framebuffer at early boot.  This code figures out
 938  * how much was set aside so we can use it for our own purposes.
 939  */
 940 static int i915_probe_agp(struct drm_device *dev, uint32_t *aperture_size,
 941                           uint32_t *preallocated_size,
 942                           uint32_t *start)
 943 {
 944         struct drm_i915_private *dev_priv = dev->dev_private;
 945         u16 tmp = 0;
 946         unsigned long overhead;
 947         unsigned long stolen;
 948
 949         /* Get the fb aperture size and "stolen" memory amount. */
 950         pci_read_config_word(dev_priv->bridge_dev, INTEL_GMCH_CTRL, &tmp);
 951
 952         *aperture_size = 1024 * 1024;
 953         *preallocated_size = 1024 * 1024;
 954
 955         switch (dev->pdev->device) {
 956         case PCI_DEVICE_ID_INTEL_82830_CGC:
 957         case PCI_DEVICE_ID_INTEL_82845G_IG:
 958         case PCI_DEVICE_ID_INTEL_82855GM_IG:
 959         case PCI_DEVICE_ID_INTEL_82865_IG:
 960                 if ((tmp & INTEL_GMCH_MEM_MASK) == INTEL_GMCH_MEM_64M)
 961                         *aperture_size *= 64;
 962                 else
 963                         *aperture_size *= 128;
 964                 break;
 965         default:
 966                 /* 9xx supports large sizes, just look at the length */
 967                 *aperture_size = pci_resource_len(dev->pdev, 2);
 968                 break;
 969         }
 970
 971         /*
 972          * Some of the preallocated space is taken by the GTT
 973          * and popup.  GTT is 1K per MB of aperture size, and popup is 4K.
 974          */
 975         if (IS_G4X(dev) || IS_PINEVIEW(dev) || IS_IRONLAKE(dev))
 976                 overhead = 4096;
 977         else
 978                 overhead = (*aperture_size / 1024) + 4096;
 979
 980         switch (tmp & INTEL_GMCH_GMS_MASK) {
 981         case INTEL_855_GMCH_GMS_DISABLED:
 982                 DRM_ERROR("video memory is disabled\n");
 983                 return -1;
 984         case INTEL_855_GMCH_GMS_STOLEN_1M:
 985                 stolen = 1 * 1024 * 1024;
 986                 break;
 987         case INTEL_855_GMCH_GMS_STOLEN_4M:
 988                 stolen = 4 * 1024 * 1024;
 989                 break;
 990         case INTEL_855_GMCH_GMS_STOLEN_8M:
 991                 stolen = 8 * 1024 * 1024;
 992                 break;
 993         case INTEL_855_GMCH_GMS_STOLEN_16M:
 994                 stolen = 16 * 1024 * 1024;
 995                 break;
 996         case INTEL_855_GMCH_GMS_STOLEN_32M:
 997                 stolen = 32 * 1024 * 1024;
 998                 break;
 999         case INTEL_915G_GMCH_GMS_STOLEN_48M:
1000                 stolen = 48 * 1024 * 1024;
1001                 break;
1002         case INTEL_915G_GMCH_GMS_STOLEN_64M:
1003                 stolen = 64 * 1024 * 1024;
1004                 break;
1005         case INTEL_GMCH_GMS_STOLEN_128M:
1006                 stolen = 128 * 1024 * 1024;
1007                 break;
1008         case INTEL_GMCH_GMS_STOLEN_256M:
1009                 stolen = 256 * 1024 * 1024;
1010                 break;
1011         case INTEL_GMCH_GMS_STOLEN_96M:
1012                 stolen = 96 * 1024 * 1024;
1013                 break;
1014         case INTEL_GMCH_GMS_STOLEN_160M:
1015                 stolen = 160 * 1024 * 1024;
1016                 break;
1017         case INTEL_GMCH_GMS_STOLEN_224M:
1018                 stolen = 224 * 1024 * 1024;
1019                 break;
1020         case INTEL_GMCH_GMS_STOLEN_352M:
1021                 stolen = 352 * 1024 * 1024;
1022                 break;
1023         default:
1024                 DRM_ERROR("unexpected GMCH_GMS value: 0x%02x\n",
1025                         tmp & INTEL_GMCH_GMS_MASK);
1026                 return -1;
1027         }
1028         *preallocated_size = stolen - overhead;
1029         *start = overhead;
1030
1031         return 0;
1032 }
1033
1034 #define PTE_ADDRESS_MASK                0xfffff000
1035 #define PTE_ADDRESS_MASK_HIGH           0x000000f0 /* i915+ */
1036 #define PTE_MAPPING_TYPE_UNCACHED       (0 << 1)
1037 #define PTE_MAPPING_TYPE_DCACHE         (1 << 1) /* i830 only */
1038 #define PTE_MAPPING_TYPE_CACHED         (3 << 1)
1039 #define PTE_MAPPING_TYPE_MASK           (3 << 1)
1040 #define PTE_VALID                       (1 << 0)
1041
1042 /**
1043  * i915_gtt_to_phys - take a GTT address and turn it into a physical one
1044  * @dev: drm device
1045  * @gtt_addr: address to translate
1046  *
1047  * Some chip functions require allocations from stolen space but need the
1048  * physical address of the memory in question.  We use this routine
1049  * to get a physical address suitable for register programming from a given
1050  * GTT address.
1051  */
1052 static unsigned long i915_gtt_to_phys(struct drm_device *dev,
1053                                       unsigned long gtt_addr)
1054 {
1055         unsigned long *gtt;
1056         unsigned long entry, phys;
1057         int gtt_bar = IS_I9XX(dev) ? 0 : 1;
1058         int gtt_offset, gtt_size;
1059
1060         if (IS_I965G(dev)) {
1061                 if (IS_G4X(dev) || IS_IRONLAKE(dev)) {
1062                         gtt_offset = 2*1024*1024;
1063                         gtt_size = 2*1024*1024;
1064                 } else {
1065                         gtt_offset = 512*1024;
1066                         gtt_size = 512*1024;
1067                 }
1068         } else {
1069                 gtt_bar = 3;
1070                 gtt_offset = 0;
1071                 gtt_size = pci_resource_len(dev->pdev, gtt_bar);
1072         }
1073
1074         gtt = ioremap_wc(pci_resource_start(dev->pdev, gtt_bar) + gtt_offset,
1075                          gtt_size);
1076         if (!gtt) {
1077                 DRM_ERROR("ioremap of GTT failed\n");
1078                 return 0;
1079         }
1080
1081         entry = *(volatile u32 *)(gtt + (gtt_addr / 1024));
1082
1083         DRM_DEBUG_DRIVER("GTT addr: 0x%08lx, PTE: 0x%08lx\n", gtt_addr, entry);
1084
1085         /* Mask out these reserved bits on this hardware. */
1086         if (!IS_I9XX(dev) || IS_I915G(dev) || IS_I915GM(dev) ||
1087             IS_I945G(dev) || IS_I945GM(dev)) {
1088                 entry &= ~PTE_ADDRESS_MASK_HIGH;
1089         }
1090
1091         /* If it's not a mapping type we know, then bail. */
1092         if ((entry & PTE_MAPPING_TYPE_MASK) != PTE_MAPPING_TYPE_UNCACHED &&
1093             (entry & PTE_MAPPING_TYPE_MASK) != PTE_MAPPING_TYPE_CACHED) {
1094                 iounmap(gtt);
1095                 return 0;
1096         }
1097
1098         if (!(entry & PTE_VALID)) {
1099                 DRM_ERROR("bad GTT entry in stolen space\n");
1100                 iounmap(gtt);
1101                 return 0;
1102         }
1103
1104         iounmap(gtt);
1105
1106         phys =(entry & PTE_ADDRESS_MASK) |
1107                 ((uint64_t)(entry & PTE_ADDRESS_MASK_HIGH) << (32 - 4));
1108
1109         DRM_DEBUG_DRIVER("GTT addr: 0x%08lx, phys addr: 0x%08lx\n", gtt_addr, phys);
1110
1111         return phys;
1112 }
1113
1114 static void i915_warn_stolen(struct drm_device *dev)
1115 {
1116         DRM_ERROR("not enough stolen space for compressed buffer, disabling\n");
1117         DRM_ERROR("hint: you may be able to increase stolen memory size in the BIOS to avoid this\n");
1118 }
1119
1120 static void i915_setup_compression(struct drm_device *dev, int size)
1121 {
1122         struct drm_i915_private *dev_priv = dev->dev_private;
1123         struct drm_mm_node *compressed_fb, *compressed_llb;
1124         unsigned long cfb_base;
1125         unsigned long ll_base = 0;
1126
1127         /* Leave 1M for line length buffer & misc. */
1128         compressed_fb = drm_mm_search_free(&dev_priv->vram, size, 4096, 0);
1129         if (!compressed_fb) {
1130                 i915_warn_stolen(dev);
1131                 return;
1132         }
1133
1134         compressed_fb = drm_mm_get_block(compressed_fb, size, 4096);
1135         if (!compressed_fb) {
1136                 i915_warn_stolen(dev);
1137                 return;
1138         }
1139
1140         cfb_base = i915_gtt_to_phys(dev, compressed_fb->start);
1141         if (!cfb_base) {
1142                 DRM_ERROR("failed to get stolen phys addr, disabling FBC\n");
1143                 drm_mm_put_block(compressed_fb);
1144         }
1145
1146         if (!IS_GM45(dev)) {
1147                 compressed_llb = drm_mm_search_free(&dev_priv->vram, 4096,
1148                                                     4096, 0);
1149                 if (!compressed_llb) {
1150                         i915_warn_stolen(dev);
1151                         return;
1152                 }
1153
1154                 compressed_llb = drm_mm_get_block(compressed_llb, 4096, 4096);
1155                 if (!compressed_llb) {
1156                         i915_warn_stolen(dev);
1157                         return;
1158                 }
1159
1160                 ll_base = i915_gtt_to_phys(dev, compressed_llb->start);
1161                 if (!ll_base) {
1162                         DRM_ERROR("failed to get stolen phys addr, disabling FBC\n");
1163                         drm_mm_put_block(compressed_fb);
1164                         drm_mm_put_block(compressed_llb);
1165                 }
1166         }
1167
1168         dev_priv->cfb_size = size;
1169
1170         if (IS_GM45(dev)) {
1171                 g4x_disable_fbc(dev);
1172                 I915_WRITE(DPFC_CB_BASE, compressed_fb->start);
1173         } else {
1174                 i8xx_disable_fbc(dev);
1175                 I915_WRITE(FBC_CFB_BASE, cfb_base);
1176                 I915_WRITE(FBC_LL_BASE, ll_base);
1177         }
1178
1179         DRM_DEBUG("FBC base 0x%08lx, ll base 0x%08lx, size %dM\n", cfb_base,
1180                   ll_base, size >> 20);
1181 }
1182
1183 /* true = enable decode, false = disable decoder */
1184 static unsigned int i915_vga_set_decode(void *cookie, bool state)
1185 {
1186         struct drm_device *dev = cookie;
1187
1188         intel_modeset_vga_set_state(dev, state);
1189         if (state)
1190                 return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
1191                        VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1192         else
1193                 return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1194 }
1195
1196 static int i915_load_modeset_init(struct drm_device *dev,
1197                                   unsigned long prealloc_start,
1198                                   unsigned long prealloc_size,
1199                                   unsigned long agp_size)
1200 {
1201         struct drm_i915_private *dev_priv = dev->dev_private;
1202         int fb_bar = IS_I9XX(dev) ? 2 : 0;
1203         int ret = 0;
1204
1205         dev->mode_config.fb_base = drm_get_resource_start(dev, fb_bar) &
1206                 0xff000000;
1207
1208         /* Basic memrange allocator for stolen space (aka vram) */
1209         drm_mm_init(&dev_priv->vram, 0, prealloc_size);
1210         DRM_INFO("set up %ldM of stolen space\n", prealloc_size / (1024*1024));
1211
1212         /* We're off and running w/KMS */
1213         dev_priv->mm.suspended = 0;
1214
1215         /* Let GEM Manage from end of prealloc space to end of aperture.
1216          *
1217          * However, leave one page at the end still bound to the scratch page.
1218          * There are a number of places where the hardware apparently
1219          * prefetches past the end of the object, and we've seen multiple
1220          * hangs with the GPU head pointer stuck in a batchbuffer bound
1221          * at the last page of the aperture.  One page should be enough to
1222          * keep any prefetching inside of the aperture.
1223          */
1224         i915_gem_do_init(dev, prealloc_size, agp_size - 4096);
1225
1226         mutex_lock(&dev->struct_mutex);
1227         ret = i915_gem_init_ringbuffer(dev);
1228         mutex_unlock(&dev->struct_mutex);
1229         if (ret)
1230                 goto out;
1231
1232         /* Try to set up FBC with a reasonable compressed buffer size */
1233         if (I915_HAS_FBC(dev) && i915_powersave) {
1234                 int cfb_size;
1235
1236                 /* Try to get an 8M buffer... */
1237                 if (prealloc_size > (9*1024*1024))
1238                         cfb_size = 8*1024*1024;
1239                 else /* fall back to 7/8 of the stolen space */
1240                         cfb_size = prealloc_size * 7 / 8;
1241                 i915_setup_compression(dev, cfb_size);
1242         }
1243
1244         /* Allow hardware batchbuffers unless told otherwise.
1245          */
1246         dev_priv->allow_batchbuffer = 1;
1247
1248         ret = intel_init_bios(dev);
1249         if (ret)
1250                 DRM_INFO("failed to find VBIOS tables\n");
1251
1252         /* if we have > 1 VGA cards, then disable the radeon VGA resources */
1253         ret = vga_client_register(dev->pdev, dev, NULL, i915_vga_set_decode);
1254         if (ret)
1255                 goto destroy_ringbuffer;
1256
1257         intel_modeset_init(dev);
1258
1259         ret = drm_irq_install(dev);
1260         if (ret)
1261                 goto destroy_ringbuffer;
1262
1263         /* Always safe in the mode setting case. */
1264         /* FIXME: do pre/post-mode set stuff in core KMS code */
1265         dev->vblank_disable_allowed = 1;
1266
1267         /*
1268          * Initialize the hardware status page IRQ location.
1269          */
1270
1271         I915_WRITE(INSTPM, (1 << 5) | (1 << 21));
1272
1273         drm_helper_initial_config(dev);
1274
1275         return 0;
1276
1277 destroy_ringbuffer:
1278         i915_gem_cleanup_ringbuffer(dev);
1279 out:
1280         return ret;
1281 }
1282
1283 int i915_master_create(struct drm_device *dev, struct drm_master *master)
1284 {
1285         struct drm_i915_master_private *master_priv;
1286
1287         master_priv = kzalloc(sizeof(*master_priv), GFP_KERNEL);
1288         if (!master_priv)
1289                 return -ENOMEM;
1290
1291         master->driver_priv = master_priv;
1292         return 0;
1293 }
1294
1295 void i915_master_destroy(struct drm_device *dev, struct drm_master *master)
1296 {
1297         struct drm_i915_master_private *master_priv = master->driver_priv;
1298
1299         if (!master_priv)
1300                 return;
1301
1302         kfree(master_priv);
1303
1304         master->driver_priv = NULL;
1305 }
1306
1307 static void i915_get_mem_freq(struct drm_device *dev)
1308 {
1309         drm_i915_private_t *dev_priv = dev->dev_private;
1310         u32 tmp;
1311
1312         if (!IS_PINEVIEW(dev))
1313                 return;
1314
1315         tmp = I915_READ(CLKCFG);
1316
1317         switch (tmp & CLKCFG_FSB_MASK) {
1318         case CLKCFG_FSB_533:
1319                 dev_priv->fsb_freq = 533; /* 133*4 */
1320                 break;
1321         case CLKCFG_FSB_800:
1322                 dev_priv->fsb_freq = 800; /* 200*4 */
1323                 break;
1324         case CLKCFG_FSB_667:
1325                 dev_priv->fsb_freq =  667; /* 167*4 */
1326                 break;
1327         case CLKCFG_FSB_400:
1328                 dev_priv->fsb_freq = 400; /* 100*4 */
1329                 break;
1330         }
1331
1332         switch (tmp & CLKCFG_MEM_MASK) {
1333         case CLKCFG_MEM_533:
1334                 dev_priv->mem_freq = 533;
1335                 break;
1336         case CLKCFG_MEM_667:
1337                 dev_priv->mem_freq = 667;
1338                 break;
1339         case CLKCFG_MEM_800:
1340                 dev_priv->mem_freq = 800;
1341                 break;
1342         }
1343 }
1344
1345 /**
1346  * i915_driver_load - setup chip and create an initial config
1347  * @dev: DRM device
1348  * @flags: startup flags
1349  *
1350  * The driver load routine has to do several things:
1351  *   - drive output discovery via intel_modeset_init()
1352  *   - initialize the memory manager
1353  *   - allocate initial config memory
1354  *   - setup the DRM framebuffer with the allocated memory
1355  */
1356 int i915_driver_load(struct drm_device *dev, unsigned long flags)
1357 {
1358         struct drm_i915_private *dev_priv = dev->dev_private;
1359         resource_size_t base, size;
1360         int ret = 0, mmio_bar;
1361         uint32_t agp_size, prealloc_size, prealloc_start;
1362
1363         /* i915 has 4 more counters */
1364         dev->counters += 4;
1365         dev->types[6] = _DRM_STAT_IRQ;
1366         dev->types[7] = _DRM_STAT_PRIMARY;
1367         dev->types[8] = _DRM_STAT_SECONDARY;
1368         dev->types[9] = _DRM_STAT_DMA;
1369
1370         dev_priv = kzalloc(sizeof(drm_i915_private_t), GFP_KERNEL);
1371         if (dev_priv == NULL)
1372                 return -ENOMEM;
1373
1374         dev->dev_private = (void *)dev_priv;
1375         dev_priv->dev = dev;
1376         dev_priv->info = (struct intel_device_info *) flags;
1377
1378         /* Add register map (needed for suspend/resume) */
1379         mmio_bar = IS_I9XX(dev) ? 0 : 1;
1380         base = drm_get_resource_start(dev, mmio_bar);
1381         size = drm_get_resource_len(dev, mmio_bar);
1382
1383         if (i915_get_bridge_dev(dev)) {
1384                 ret = -EIO;
1385                 goto free_priv;
1386         }
1387
1388         dev_priv->regs = ioremap(base, size);
1389         if (!dev_priv->regs) {
1390                 DRM_ERROR("failed to map registers\n");
1391                 ret = -EIO;
1392                 goto put_bridge;
1393         }
1394
1395         dev_priv->mm.gtt_mapping =
1396                 io_mapping_create_wc(dev->agp->base,
1397                                      dev->agp->agp_info.aper_size * 1024*1024);
1398         if (dev_priv->mm.gtt_mapping == NULL) {
1399                 ret = -EIO;
1400                 goto out_rmmap;
1401         }
1402
1403         /* Set up a WC MTRR for non-PAT systems.  This is more common than
1404          * one would think, because the kernel disables PAT on first
1405          * generation Core chips because WC PAT gets overridden by a UC
1406          * MTRR if present.  Even if a UC MTRR isn't present.
1407          */
1408         dev_priv->mm.gtt_mtrr = mtrr_add(dev->agp->base,
1409                                          dev->agp->agp_info.aper_size *
1410                                          1024 * 1024,
1411                                          MTRR_TYPE_WRCOMB, 1);
1412         if (dev_priv->mm.gtt_mtrr < 0) {
1413                 DRM_INFO("MTRR allocation failed.  Graphics "
1414                          "performance may suffer.\n");
1415         }
1416
1417         ret = i915_probe_agp(dev, &agp_size, &prealloc_size, &prealloc_start);
1418         if (ret)
1419                 goto out_iomapfree;
1420
1421         dev_priv->wq = create_singlethread_workqueue("i915");
1422         if (dev_priv->wq == NULL) {
1423                 DRM_ERROR("Failed to create our workqueue.\n");
1424                 ret = -ENOMEM;
1425                 goto out_iomapfree;
1426         }
1427
1428         /* enable GEM by default */
1429         dev_priv->has_gem = 1;
1430
1431         if (prealloc_size > agp_size * 3 / 4) {
1432                 DRM_ERROR("Detected broken video BIOS with %d/%dkB of video "
1433                           "memory stolen.\n",
1434                           prealloc_size / 1024, agp_size / 1024);
1435                 DRM_ERROR("Disabling GEM. (try reducing stolen memory or "
1436                           "updating the BIOS to fix).\n");
1437                 dev_priv->has_gem = 0;
1438         }
1439
1440         dev->driver->get_vblank_counter = i915_get_vblank_counter;
1441         dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
1442         if (IS_G4X(dev) || IS_IRONLAKE(dev)) {
1443                 dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
1444                 dev->driver->get_vblank_counter = gm45_get_vblank_counter;
1445         }
1446
1447         i915_gem_load(dev);
1448
1449         /* Init HWS */
1450         if (!I915_NEED_GFX_HWS(dev)) {
1451                 ret = i915_init_phys_hws(dev);
1452                 if (ret != 0)
1453                         goto out_workqueue_free;
1454         }
1455
1456         i915_get_mem_freq(dev);
1457
1458         /* On the 945G/GM, the chipset reports the MSI capability on the
1459          * integrated graphics even though the support isn't actually there
1460          * according to the published specs.  It doesn't appear to function
1461          * correctly in testing on 945G.
1462          * This may be a side effect of MSI having been made available for PEG
1463          * and the registers being closely associated.
1464          *
1465          * According to chipset errata, on the 965GM, MSI interrupts may
1466          * be lost or delayed, but we use them anyways to avoid
1467          * stuck interrupts on some machines.
1468          */
1469         if (!IS_I945G(dev) && !IS_I945GM(dev))
1470                 pci_enable_msi(dev->pdev);
1471
1472         spin_lock_init(&dev_priv->user_irq_lock);
1473         spin_lock_init(&dev_priv->error_lock);
1474         dev_priv->user_irq_refcount = 0;
1475         dev_priv->trace_irq_seqno = 0;
1476
1477         ret = drm_vblank_init(dev, I915_NUM_PIPE);
1478
1479         if (ret) {
1480                 (void) i915_driver_unload(dev);
1481                 return ret;
1482         }
1483
1484         /* Start out suspended */
1485         dev_priv->mm.suspended = 1;
1486
1487         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
1488                 ret = i915_load_modeset_init(dev, prealloc_start,
1489                                              prealloc_size, agp_size);
1490                 if (ret < 0) {
1491                         DRM_ERROR("failed to init modeset\n");
1492                         goto out_workqueue_free;
1493                 }
1494         }
1495
1496         /* Must be done after probing outputs */
1497         intel_opregion_init(dev, 0);
1498
1499         setup_timer(&dev_priv->hangcheck_timer, i915_hangcheck_elapsed,
1500                     (unsigned long) dev);
1501         return 0;
1502
1503 out_workqueue_free:
1504         destroy_workqueue(dev_priv->wq);
1505 out_iomapfree:
1506         io_mapping_free(dev_priv->mm.gtt_mapping);
1507 out_rmmap:
1508         iounmap(dev_priv->regs);
1509 put_bridge:
1510         pci_dev_put(dev_priv->bridge_dev);
1511 free_priv:
1512         kfree(dev_priv);
1513         return ret;
1514 }
1515
1516 int i915_driver_unload(struct drm_device *dev)
1517 {
1518         struct drm_i915_private *dev_priv = dev->dev_private;
1519
1520         destroy_workqueue(dev_priv->wq);
1521         del_timer_sync(&dev_priv->hangcheck_timer);
1522
1523         io_mapping_free(dev_priv->mm.gtt_mapping);
1524         if (dev_priv->mm.gtt_mtrr >= 0) {
1525                 mtrr_del(dev_priv->mm.gtt_mtrr, dev->agp->base,
1526                          dev->agp->agp_info.aper_size * 1024 * 1024);
1527                 dev_priv->mm.gtt_mtrr = -1;
1528         }
1529
1530         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
1531                 /*
1532                  * free the memory space allocated for the child device
1533                  * config parsed from VBT
1534                  */
1535                 if (dev_priv->child_dev && dev_priv->child_dev_num) {
1536                         kfree(dev_priv->child_dev);
1537                         dev_priv->child_dev = NULL;
1538                         dev_priv->child_dev_num = 0;
1539                 }
1540                 drm_irq_uninstall(dev);
1541                 vga_client_register(dev->pdev, NULL, NULL, NULL);
1542         }
1543
1544         if (dev->pdev->msi_enabled)
1545                 pci_disable_msi(dev->pdev);
1546
1547         if (dev_priv->regs != NULL)
1548                 iounmap(dev_priv->regs);
1549
1550         intel_opregion_free(dev, 0);
1551
1552         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
1553                 intel_modeset_cleanup(dev);
1554
1555                 i915_gem_free_all_phys_object(dev);
1556
1557                 mutex_lock(&dev->struct_mutex);
1558                 i915_gem_cleanup_ringbuffer(dev);
1559                 mutex_unlock(&dev->struct_mutex);
1560                 drm_mm_takedown(&dev_priv->vram);
1561                 i915_gem_lastclose(dev);
1562
1563                 intel_cleanup_overlay(dev);
1564         }
1565
1566         pci_dev_put(dev_priv->bridge_dev);
1567         kfree(dev->dev_private);
1568
1569         return 0;
1570 }
1571
1572 int i915_driver_open(struct drm_device *dev, struct drm_file *file_priv)
1573 {
1574         struct drm_i915_file_private *i915_file_priv;
1575
1576         DRM_DEBUG_DRIVER("\n");
1577         i915_file_priv = (struct drm_i915_file_private *)
1578             kmalloc(sizeof(*i915_file_priv), GFP_KERNEL);
1579
1580         if (!i915_file_priv)
1581                 return -ENOMEM;
1582
1583         file_priv->driver_priv = i915_file_priv;
1584
1585         INIT_LIST_HEAD(&i915_file_priv->mm.request_list);
1586
1587         return 0;
1588 }
1589
1590 /**
1591  * i915_driver_lastclose - clean up after all DRM clients have exited
1592  * @dev: DRM device
1593  *
1594  * Take care of cleaning up after all DRM clients have exited.  In the
1595  * mode setting case, we want to restore the kernel's initial mode (just
1596  * in case the last client left us in a bad state).
1597  *
1598  * Additionally, in the non-mode setting case, we'll tear down the AGP
1599  * and DMA structures, since the kernel won't be using them, and clea
1600  * up any GEM state.
1601  */
1602 void i915_driver_lastclose(struct drm_device * dev)
1603 {
1604         drm_i915_private_t *dev_priv = dev->dev_private;
1605
1606         if (!dev_priv || drm_core_check_feature(dev, DRIVER_MODESET)) {
1607                 drm_fb_helper_restore();
1608                 return;
1609         }
1610
1611         i915_gem_lastclose(dev);
1612
1613         if (dev_priv->agp_heap)
1614                 i915_mem_takedown(&(dev_priv->agp_heap));
1615
1616         i915_dma_cleanup(dev);
1617 }
1618
1619 void i915_driver_preclose(struct drm_device * dev, struct drm_file *file_priv)
1620 {
1621         drm_i915_private_t *dev_priv = dev->dev_private;
1622         i915_gem_release(dev, file_priv);
1623         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1624                 i915_mem_release(dev, file_priv, dev_priv->agp_heap);
1625 }
1626
1627 void i915_driver_postclose(struct drm_device *dev, struct drm_file *file_priv)
1628 {
1629         struct drm_i915_file_private *i915_file_priv = file_priv->driver_priv;
1630
1631         kfree(i915_file_priv);
1632 }
1633
1634 struct drm_ioctl_desc i915_ioctls[] = {
1635         DRM_IOCTL_DEF(DRM_I915_INIT, i915_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1636         DRM_IOCTL_DEF(DRM_I915_FLUSH, i915_flush_ioctl, DRM_AUTH),
1637         DRM_IOCTL_DEF(DRM_I915_FLIP, i915_flip_bufs, DRM_AUTH),
1638         DRM_IOCTL_DEF(DRM_I915_BATCHBUFFER, i915_batchbuffer, DRM_AUTH),
1639         DRM_IOCTL_DEF(DRM_I915_IRQ_EMIT, i915_irq_emit, DRM_AUTH),
1640         DRM_IOCTL_DEF(DRM_I915_IRQ_WAIT, i915_irq_wait, DRM_AUTH),
1641         DRM_IOCTL_DEF(DRM_I915_GETPARAM, i915_getparam, DRM_AUTH),
1642         DRM_IOCTL_DEF(DRM_I915_SETPARAM, i915_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1643         DRM_IOCTL_DEF(DRM_I915_ALLOC, i915_mem_alloc, DRM_AUTH),
1644         DRM_IOCTL_DEF(DRM_I915_FREE, i915_mem_free, DRM_AUTH),
1645         DRM_IOCTL_DEF(DRM_I915_INIT_HEAP, i915_mem_init_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1646         DRM_IOCTL_DEF(DRM_I915_CMDBUFFER, i915_cmdbuffer, DRM_AUTH),
1647         DRM_IOCTL_DEF(DRM_I915_DESTROY_HEAP,  i915_mem_destroy_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY ),
1648         DRM_IOCTL_DEF(DRM_I915_SET_VBLANK_PIPE,  i915_vblank_pipe_set, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY ),
1649         DRM_IOCTL_DEF(DRM_I915_GET_VBLANK_PIPE,  i915_vblank_pipe_get, DRM_AUTH ),
1650         DRM_IOCTL_DEF(DRM_I915_VBLANK_SWAP, i915_vblank_swap, DRM_AUTH),
1651         DRM_IOCTL_DEF(DRM_I915_HWS_ADDR, i915_set_status_page, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1652         DRM_IOCTL_DEF(DRM_I915_GEM_INIT, i915_gem_init_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1653         DRM_IOCTL_DEF(DRM_I915_GEM_EXECBUFFER, i915_gem_execbuffer, DRM_AUTH),
1654         DRM_IOCTL_DEF(DRM_I915_GEM_EXECBUFFER2, i915_gem_execbuffer2, DRM_AUTH),
1655         DRM_IOCTL_DEF(DRM_I915_GEM_PIN, i915_gem_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY),
1656         DRM_IOCTL_DEF(DRM_I915_GEM_UNPIN, i915_gem_unpin_ioctl, DRM_AUTH|DRM_ROOT_ONLY),
1657         DRM_IOCTL_DEF(DRM_I915_GEM_BUSY, i915_gem_busy_ioctl, DRM_AUTH),
1658         DRM_IOCTL_DEF(DRM_I915_GEM_THROTTLE, i915_gem_throttle_ioctl, DRM_AUTH),
1659         DRM_IOCTL_DEF(DRM_I915_GEM_ENTERVT, i915_gem_entervt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1660         DRM_IOCTL_DEF(DRM_I915_GEM_LEAVEVT, i915_gem_leavevt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1661         DRM_IOCTL_DEF(DRM_I915_GEM_CREATE, i915_gem_create_ioctl, 0),
1662         DRM_IOCTL_DEF(DRM_I915_GEM_PREAD, i915_gem_pread_ioctl, 0),
1663         DRM_IOCTL_DEF(DRM_I915_GEM_PWRITE, i915_gem_pwrite_ioctl, 0),
1664         DRM_IOCTL_DEF(DRM_I915_GEM_MMAP, i915_gem_mmap_ioctl, 0),
1665         DRM_IOCTL_DEF(DRM_I915_GEM_MMAP_GTT, i915_gem_mmap_gtt_ioctl, 0),
1666         DRM_IOCTL_DEF(DRM_I915_GEM_SET_DOMAIN, i915_gem_set_domain_ioctl, 0),
1667         DRM_IOCTL_DEF(DRM_I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, 0),
1668         DRM_IOCTL_DEF(DRM_I915_GEM_SET_TILING, i915_gem_set_tiling, 0),
1669         DRM_IOCTL_DEF(DRM_I915_GEM_GET_TILING, i915_gem_get_tiling, 0),
1670         DRM_IOCTL_DEF(DRM_I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, 0),
1671         DRM_IOCTL_DEF(DRM_I915_GET_PIPE_FROM_CRTC_ID, intel_get_pipe_from_crtc_id, 0),
1672         DRM_IOCTL_DEF(DRM_I915_GEM_MADVISE, i915_gem_madvise_ioctl, 0),
1673         DRM_IOCTL_DEF(DRM_I915_OVERLAY_PUT_IMAGE, intel_overlay_put_image, DRM_MASTER|DRM_CONTROL_ALLOW),
1674         DRM_IOCTL_DEF(DRM_I915_OVERLAY_ATTRS, intel_overlay_attrs, DRM_MASTER|DRM_CONTROL_ALLOW),
1675 };
1676
1677 int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);
1678
1679 /**
1680  * Determine if the device really is AGP or not.
1681  *
1682  * All Intel graphics chipsets are treated as AGP, even if they are really
1683  * PCI-e.
1684  *
1685  * \param dev   The device to be tested.
1686  *
1687  * \returns
1688  * A value of 1 is always retured to indictate every i9x5 is AGP.
1689  */
1690 int i915_driver_device_is_agp(struct drm_device * dev)
1691 {
1692         return 1;
1693 }